Commit | Line | Data |
---|---|---|
570d7624 | 1 | /* File IO for GNU Emacs. |
e9bffc61 | 2 | |
ba318903 | 3 | Copyright (C) 1985-1988, 1993-2014 Free Software Foundation, Inc. |
570d7624 JB |
4 | |
5 | This file is part of GNU Emacs. | |
6 | ||
9ec0b715 | 7 | GNU Emacs is free software: you can redistribute it and/or modify |
570d7624 | 8 | it under the terms of the GNU General Public License as published by |
9ec0b715 GM |
9 | the Free Software Foundation, either version 3 of the License, or |
10 | (at your option) any later version. | |
570d7624 JB |
11 | |
12 | GNU Emacs is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
9ec0b715 | 18 | along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. */ |
570d7624 | 19 | |
18160b98 | 20 | #include <config.h> |
77a28bbf | 21 | #include <limits.h> |
bb369dc6 | 22 | #include <fcntl.h> |
406af475 | 23 | #include "sysstdio.h" |
570d7624 JB |
24 | #include <sys/types.h> |
25 | #include <sys/stat.h> | |
29beb080 | 26 | #include <unistd.h> |
29beb080 | 27 | |
5b9c0a1d | 28 | #ifdef HAVE_PWD_H |
570d7624 | 29 | #include <pwd.h> |
bfb61299 JB |
30 | #endif |
31 | ||
570d7624 JB |
32 | #include <errno.h> |
33 | ||
574c05e2 KK |
34 | #ifdef HAVE_LIBSELINUX |
35 | #include <selinux/selinux.h> | |
36 | #include <selinux/context.h> | |
37 | #endif | |
38 | ||
ffdc270a | 39 | #ifdef HAVE_ACL_SET_FILE |
7c3d167f RF |
40 | #include <sys/acl.h> |
41 | #endif | |
42 | ||
620f13b0 PE |
43 | #include <c-ctype.h> |
44 | ||
570d7624 | 45 | #include "lisp.h" |
8d4e077b | 46 | #include "intervals.h" |
db327c7e | 47 | #include "character.h" |
e5560ff7 | 48 | #include "buffer.h" |
6fdaa9a0 | 49 | #include "coding.h" |
570d7624 | 50 | #include "window.h" |
67c08d6c | 51 | #include "blockinput.h" |
addccbd0 | 52 | #include "region-cache.h" |
385ed61f KL |
53 | #include "frame.h" |
54 | #include "dispextern.h" | |
570d7624 | 55 | |
5e570b75 RS |
56 | #ifdef WINDOWSNT |
57 | #define NOMINMAX 1 | |
58 | #include <windows.h> | |
bb385a92 | 59 | #include <sys/file.h> |
a68089e4 | 60 | #include "w32.h" |
5e570b75 RS |
61 | #endif /* not WINDOWSNT */ |
62 | ||
7990d02a EZ |
63 | #ifdef MSDOS |
64 | #include "msdos.h" | |
65 | #include <sys/param.h> | |
7990d02a | 66 | #endif |
7990d02a | 67 | |
199607e4 | 68 | #ifdef DOS_NT |
199607e4 | 69 | /* On Windows, drive letters must be alphabetic - on DOS, the Netware |
a5bb9bd3 | 70 | redirector allows the six letters between 'Z' and 'a' as well. */ |
199607e4 RS |
71 | #ifdef MSDOS |
72 | #define IS_DRIVE(x) ((x) >= 'A' && (x) <= 'z') | |
73 | #endif | |
74 | #ifdef WINDOWSNT | |
620f13b0 | 75 | #define IS_DRIVE(x) c_isalpha (x) |
199607e4 | 76 | #endif |
f54b565c | 77 | /* Need to lower-case the drive letter, or else expanded |
53964682 | 78 | filenames will sometimes compare unequal, because |
f54b565c | 79 | `expand-file-name' doesn't always down-case the drive letter. */ |
620f13b0 | 80 | #define DRIVE_LETTER(x) c_tolower (x) |
199607e4 RS |
81 | #endif |
82 | ||
de5bf5d3 | 83 | #include "systime.h" |
ffdc270a | 84 | #include <acl.h> |
8654f9d7 PE |
85 | #include <allocator.h> |
86 | #include <careadlinkat.h> | |
d35af63c | 87 | #include <stat-time.h> |
570d7624 JB |
88 | |
89 | #ifdef HPUX | |
90 | #include <netio.h> | |
47e7b9e5 | 91 | #endif |
570d7624 | 92 | |
9c856db9 | 93 | #include "commands.h" |
9c856db9 | 94 | |
f75d7a91 PE |
95 | /* True during writing of auto-save files. */ |
96 | static bool auto_saving; | |
570d7624 | 97 | |
a560b856 PE |
98 | /* Emacs's real umask. */ |
99 | static mode_t realmask; | |
100 | ||
71873e2b | 101 | /* Nonzero umask during creation of auto-save directories. */ |
f75d7a91 | 102 | static mode_t auto_saving_dir_umask; |
09450bae | 103 | |
570d7624 | 104 | /* Set by auto_save_1 to mode of original file so Fwrite_region will create |
71873e2b | 105 | a new file with the same mode as the original. */ |
f75d7a91 | 106 | static mode_t auto_save_mode_bits; |
570d7624 | 107 | |
71873e2b | 108 | /* Set by auto_save_1 if an error occurred during the last auto-save. */ |
f75d7a91 | 109 | static bool auto_save_error_occurred; |
ca730bf0 | 110 | |
9fe43ff6 PE |
111 | /* If VALID_TIMESTAMP_FILE_SYSTEM, then TIMESTAMP_FILE_SYSTEM is the device |
112 | number of a file system where time stamps were observed to to work. */ | |
113 | static bool valid_timestamp_file_system; | |
114 | static dev_t timestamp_file_system; | |
115 | ||
356a6224 KH |
116 | /* The symbol bound to coding-system-for-read when |
117 | insert-file-contents is called for recovering a file. This is not | |
118 | an actual coding system name, but just an indicator to tell | |
119 | insert-file-contents to use `emacs-mule' with a special flag for | |
120 | auto saving and recovering a file. */ | |
955cbe7b | 121 | static Lisp_Object Qauto_save_coding; |
356a6224 | 122 | |
f6c9b683 RS |
123 | /* Property name of a file name handler, |
124 | which gives a list of operations it handles.. */ | |
955cbe7b | 125 | static Lisp_Object Qoperations; |
f6c9b683 | 126 | |
71873e2b | 127 | /* Lisp functions for translating file formats. */ |
955cbe7b | 128 | static Lisp_Object Qformat_decode, Qformat_annotate_function; |
0d420e88 | 129 | |
2080470e | 130 | /* Lisp function for setting buffer-file-coding-system and the |
b6426b03 | 131 | multibyteness of the current buffer after inserting a file. */ |
955cbe7b | 132 | static Lisp_Object Qafter_insert_file_set_coding; |
b6426b03 | 133 | |
955cbe7b | 134 | static Lisp_Object Qwrite_region_annotate_functions; |
67fbc0cb CY |
135 | /* Each time an annotation function changes the buffer, the new buffer |
136 | is added here. */ | |
5045092b | 137 | static Lisp_Object Vwrite_region_annotation_buffers; |
67fbc0cb | 138 | |
955cbe7b | 139 | static Lisp_Object Qdelete_by_moving_to_trash; |
d2b66acf | 140 | |
6cf29fe8 | 141 | /* Lisp function for moving files to trash. */ |
955cbe7b | 142 | static Lisp_Object Qmove_file_to_trash; |
6cf29fe8 | 143 | |
8719abec | 144 | /* Lisp function for recursively copying directories. */ |
955cbe7b | 145 | static Lisp_Object Qcopy_directory; |
8719abec CY |
146 | |
147 | /* Lisp function for recursively deleting directories. */ | |
955cbe7b | 148 | static Lisp_Object Qdelete_directory; |
8719abec | 149 | |
ee041f2d SM |
150 | static Lisp_Object Qsubstitute_env_in_file_name; |
151 | ||
86dfb7a8 | 152 | Lisp_Object Qfile_error, Qfile_notify_error; |
955cbe7b PE |
153 | static Lisp_Object Qfile_already_exists, Qfile_date_error; |
154 | static Lisp_Object Qexcl; | |
15c65264 RS |
155 | Lisp_Object Qfile_name_history; |
156 | ||
955cbe7b | 157 | static Lisp_Object Qcar_less_than_car; |
d6a3cc15 | 158 | |
f75d7a91 PE |
159 | static bool a_write (int, Lisp_Object, ptrdiff_t, ptrdiff_t, |
160 | Lisp_Object *, struct coding_system *); | |
161 | static bool e_write (int, Lisp_Object, ptrdiff_t, ptrdiff_t, | |
162 | struct coding_system *); | |
ce51c54c | 163 | |
ec7adf26 | 164 | \f |
3d798ba7 PE |
165 | /* Return true if FILENAME exists. */ |
166 | ||
167 | static bool | |
168 | check_existing (const char *filename) | |
169 | { | |
170 | return faccessat (AT_FDCWD, filename, F_OK, AT_EACCESS) == 0; | |
171 | } | |
172 | ||
173 | /* Return true if file FILENAME exists and can be executed. */ | |
174 | ||
175 | static bool | |
176 | check_executable (char *filename) | |
177 | { | |
178 | return faccessat (AT_FDCWD, filename, X_OK, AT_EACCESS) == 0; | |
179 | } | |
180 | ||
181 | /* Return true if file FILENAME exists and can be accessed | |
182 | according to AMODE, which should include W_OK. | |
183 | On failure, return false and set errno. */ | |
184 | ||
185 | static bool | |
186 | check_writable (const char *filename, int amode) | |
187 | { | |
188 | #ifdef MSDOS | |
189 | /* FIXME: an faccessat implementation should be added to the | |
190 | DOS/Windows ports and this #ifdef branch should be removed. */ | |
191 | struct stat st; | |
192 | if (stat (filename, &st) < 0) | |
193 | return 0; | |
194 | errno = EPERM; | |
195 | return (st.st_mode & S_IWRITE || S_ISDIR (st.st_mode)); | |
196 | #else /* not MSDOS */ | |
197 | bool res = faccessat (AT_FDCWD, filename, amode, AT_EACCESS) == 0; | |
198 | #ifdef CYGWIN | |
199 | /* faccessat may have returned failure because Cygwin couldn't | |
200 | determine the file's UID or GID; if so, we return success. */ | |
201 | if (!res) | |
202 | { | |
203 | int faccessat_errno = errno; | |
204 | struct stat st; | |
205 | if (stat (filename, &st) < 0) | |
206 | return 0; | |
207 | res = (st.st_uid == -1 || st.st_gid == -1); | |
208 | errno = faccessat_errno; | |
209 | } | |
210 | #endif /* CYGWIN */ | |
211 | return res; | |
212 | #endif /* not MSDOS */ | |
213 | } | |
214 | \f | |
a773ed9a | 215 | /* Signal a file-access failure. STRING describes the failure, |
a9757f6a PE |
216 | NAME the file involved, and ERRORNO the errno value. |
217 | ||
218 | If NAME is neither null nor a pair, package it up as a singleton | |
219 | list before reporting it; this saves report_file_errno's caller the | |
220 | trouble of preserving errno before calling list1. */ | |
a773ed9a | 221 | |
5d01d666 | 222 | void |
a9757f6a | 223 | report_file_errno (char const *string, Lisp_Object name, int errorno) |
570d7624 | 224 | { |
a9757f6a | 225 | Lisp_Object data = CONSP (name) || NILP (name) ? name : list1 (name); |
570d7624 | 226 | Lisp_Object errstring; |
d7259fdb | 227 | char *str; |
570d7624 | 228 | |
ca9c0567 | 229 | synchronize_system_messages_locale (); |
d7259fdb | 230 | str = strerror (errorno); |
d7ea76b4 | 231 | errstring = code_convert_string_norecord (build_unibyte_string (str), |
68c45bf0 PE |
232 | Vlocale_coding_system, 0); |
233 | ||
570d7624 | 234 | while (1) |
505ab9bc RS |
235 | switch (errorno) |
236 | { | |
237 | case EEXIST: | |
24b1ddad | 238 | xsignal (Qfile_already_exists, Fcons (errstring, data)); |
505ab9bc RS |
239 | break; |
240 | default: | |
241 | /* System error messages are capitalized. Downcase the initial | |
39824137 EZ |
242 | unless it is followed by a slash. (The slash case caters to |
243 | error messages that begin with "I/O" or, in German, "E/A".) */ | |
d5443ffd KH |
244 | if (STRING_MULTIBYTE (errstring) |
245 | && ! EQ (Faref (errstring, make_number (1)), make_number ('/'))) | |
6c0969ca KH |
246 | { |
247 | int c; | |
248 | ||
51b59d79 | 249 | str = SSDATA (errstring); |
5976c3fe | 250 | c = STRING_CHAR ((unsigned char *) str); |
5da9919f | 251 | Faset (errstring, make_number (0), make_number (downcase (c))); |
6c0969ca | 252 | } |
505ab9bc | 253 | |
24b1ddad | 254 | xsignal (Qfile_error, |
505ab9bc RS |
255 | Fcons (build_string (string), Fcons (errstring, data))); |
256 | } | |
570d7624 | 257 | } |
b5148e85 | 258 | |
a9757f6a | 259 | /* Signal a file-access failure that set errno. STRING describes the |
b648c163 PE |
260 | failure, NAME the file involved. When invoking this function, take |
261 | care to not use arguments such as build_string ("foo") that involve | |
262 | side effects that may set errno. */ | |
a9757f6a | 263 | |
a773ed9a | 264 | void |
a9757f6a | 265 | report_file_error (char const *string, Lisp_Object name) |
a773ed9a | 266 | { |
a9757f6a | 267 | report_file_errno (string, name, errno); |
a773ed9a PE |
268 | } |
269 | ||
27e498e6 PE |
270 | void |
271 | close_file_unwind (int fd) | |
b5148e85 | 272 | { |
a0931322 | 273 | emacs_close (fd); |
b5148e85 | 274 | } |
a1d2b64a | 275 | |
f4b1eb36 PE |
276 | void |
277 | fclose_unwind (void *arg) | |
278 | { | |
279 | FILE *stream = arg; | |
280 | fclose (stream); | |
281 | } | |
282 | ||
a1d2b64a RS |
283 | /* Restore point, having saved it as a marker. */ |
284 | ||
27e498e6 | 285 | void |
971de7fb | 286 | restore_point_unwind (Lisp_Object location) |
a1d2b64a | 287 | { |
ec7adf26 | 288 | Fgoto_char (location); |
bc923770 | 289 | unchain_marker (XMARKER (location)); |
a1d2b64a | 290 | } |
59c94f03 | 291 | |
570d7624 | 292 | \f |
955cbe7b PE |
293 | static Lisp_Object Qexpand_file_name; |
294 | static Lisp_Object Qsubstitute_in_file_name; | |
295 | static Lisp_Object Qdirectory_file_name; | |
296 | static Lisp_Object Qfile_name_directory; | |
297 | static Lisp_Object Qfile_name_nondirectory; | |
298 | static Lisp_Object Qunhandled_file_name_directory; | |
299 | static Lisp_Object Qfile_name_as_directory; | |
300 | static Lisp_Object Qcopy_file; | |
301 | static Lisp_Object Qmake_directory_internal; | |
302 | static Lisp_Object Qmake_directory; | |
303 | static Lisp_Object Qdelete_directory_internal; | |
32f4334d | 304 | Lisp_Object Qdelete_file; |
955cbe7b PE |
305 | static Lisp_Object Qrename_file; |
306 | static Lisp_Object Qadd_name_to_file; | |
307 | static Lisp_Object Qmake_symbolic_link; | |
32f4334d | 308 | Lisp_Object Qfile_exists_p; |
955cbe7b PE |
309 | static Lisp_Object Qfile_executable_p; |
310 | static Lisp_Object Qfile_readable_p; | |
311 | static Lisp_Object Qfile_writable_p; | |
312 | static Lisp_Object Qfile_symlink_p; | |
313 | static Lisp_Object Qaccess_file; | |
32f4334d | 314 | Lisp_Object Qfile_directory_p; |
955cbe7b PE |
315 | static Lisp_Object Qfile_regular_p; |
316 | static Lisp_Object Qfile_accessible_directory_p; | |
317 | static Lisp_Object Qfile_modes; | |
318 | static Lisp_Object Qset_file_modes; | |
319 | static Lisp_Object Qset_file_times; | |
320 | static Lisp_Object Qfile_selinux_context; | |
321 | static Lisp_Object Qset_file_selinux_context; | |
7c3d167f RF |
322 | static Lisp_Object Qfile_acl; |
323 | static Lisp_Object Qset_file_acl; | |
955cbe7b | 324 | static Lisp_Object Qfile_newer_than_file_p; |
32f4334d | 325 | Lisp_Object Qinsert_file_contents; |
3f011c7f | 326 | static Lisp_Object Qchoose_write_coding_system; |
32f4334d | 327 | Lisp_Object Qwrite_region; |
955cbe7b PE |
328 | static Lisp_Object Qverify_visited_file_modtime; |
329 | static Lisp_Object Qset_visited_file_modtime; | |
32f4334d | 330 | |
a7ca3326 | 331 | DEFUN ("find-file-name-handler", Ffind_file_name_handler, |
16a97296 | 332 | Sfind_file_name_handler, 2, 2, 0, |
8c1a1077 PJ |
333 | doc: /* Return FILENAME's handler function for OPERATION, if it has one. |
334 | Otherwise, return nil. | |
335 | A file name is handled if one of the regular expressions in | |
336 | `file-name-handler-alist' matches it. | |
337 | ||
338 | If OPERATION equals `inhibit-file-name-operation', then we ignore | |
339 | any handlers that are members of `inhibit-file-name-handlers', | |
340 | but we still do run any other handlers. This lets handlers | |
341 | use the standard functions without calling themselves recursively. */) | |
5842a27b | 342 | (Lisp_Object filename, Lisp_Object operation) |
32f4334d | 343 | { |
642ef245 | 344 | /* This function must not munge the match data. */ |
204ee271 | 345 | Lisp_Object chain, inhibited_handlers, result; |
d311d28c | 346 | ptrdiff_t pos = -1; |
642ef245 | 347 | |
204ee271 | 348 | result = Qnil; |
b7826503 | 349 | CHECK_STRING (filename); |
e4432095 | 350 | |
a65970a0 RS |
351 | if (EQ (operation, Vinhibit_file_name_operation)) |
352 | inhibited_handlers = Vinhibit_file_name_handlers; | |
353 | else | |
354 | inhibited_handlers = Qnil; | |
82c2d839 | 355 | |
93c30b5f | 356 | for (chain = Vfile_name_handler_alist; CONSP (chain); |
03699b14 | 357 | chain = XCDR (chain)) |
32f4334d RS |
358 | { |
359 | Lisp_Object elt; | |
03699b14 | 360 | elt = XCAR (chain); |
93c30b5f | 361 | if (CONSP (elt)) |
32f4334d | 362 | { |
f6c9b683 | 363 | Lisp_Object string = XCAR (elt); |
d311d28c | 364 | ptrdiff_t match_pos; |
f6c9b683 | 365 | Lisp_Object handler = XCDR (elt); |
68780e2a RS |
366 | Lisp_Object operations = Qnil; |
367 | ||
368 | if (SYMBOLP (handler)) | |
369 | operations = Fget (handler, Qoperations); | |
f6c9b683 | 370 | |
8d2ced53 | 371 | if (STRINGP (string) |
f6c9b683 RS |
372 | && (match_pos = fast_string_match (string, filename)) > pos |
373 | && (NILP (operations) || ! NILP (Fmemq (operation, operations)))) | |
a65970a0 | 374 | { |
f6c9b683 | 375 | Lisp_Object tem; |
a65970a0 | 376 | |
03699b14 | 377 | handler = XCDR (elt); |
a65970a0 RS |
378 | tem = Fmemq (handler, inhibited_handlers); |
379 | if (NILP (tem)) | |
8d2ced53 SM |
380 | { |
381 | result = handler; | |
382 | pos = match_pos; | |
383 | } | |
a65970a0 | 384 | } |
32f4334d | 385 | } |
642ef245 JB |
386 | |
387 | QUIT; | |
32f4334d | 388 | } |
8d2ced53 | 389 | return result; |
32f4334d RS |
390 | } |
391 | \f | |
a7ca3326 | 392 | DEFUN ("file-name-directory", Ffile_name_directory, Sfile_name_directory, |
8c1a1077 PJ |
393 | 1, 1, 0, |
394 | doc: /* Return the directory component in file name FILENAME. | |
395 | Return nil if FILENAME does not include a directory. | |
78379264 | 396 | Otherwise return a directory name. |
7c2fb837 | 397 | Given a Unix syntax file name, returns a string ending in slash. */) |
5842a27b | 398 | (Lisp_Object filename) |
570d7624 | 399 | { |
100c44b7 | 400 | #ifndef DOS_NT |
5976c3fe | 401 | register const char *beg; |
100c44b7 | 402 | #else |
5976c3fe | 403 | register char *beg; |
273ac8d1 | 404 | Lisp_Object tem_fn; |
100c44b7 | 405 | #endif |
5976c3fe | 406 | register const char *p; |
0bf2eed2 | 407 | Lisp_Object handler; |
570d7624 | 408 | |
b7826503 | 409 | CHECK_STRING (filename); |
570d7624 | 410 | |
0bf2eed2 RS |
411 | /* If the file name has special constructs in it, |
412 | call the corresponding file handler. */ | |
3b7f6e60 | 413 | handler = Ffind_file_name_handler (filename, Qfile_name_directory); |
0bf2eed2 | 414 | if (!NILP (handler)) |
2375c96a CY |
415 | { |
416 | Lisp_Object handled_name = call2 (handler, Qfile_name_directory, | |
417 | filename); | |
418 | return STRINGP (handled_name) ? handled_name : Qnil; | |
419 | } | |
0bf2eed2 | 420 | |
199607e4 | 421 | #ifdef DOS_NT |
5b71542d | 422 | beg = xlispstrdupa (filename); |
0f3f018c | 423 | #else |
5976c3fe | 424 | beg = SSDATA (filename); |
199607e4 | 425 | #endif |
d5db4077 | 426 | p = beg + SBYTES (filename); |
570d7624 | 427 | |
199607e4 | 428 | while (p != beg && !IS_DIRECTORY_SEP (p[-1]) |
199607e4 | 429 | #ifdef DOS_NT |
e1dbe924 | 430 | /* only recognize drive specifier at the beginning */ |
ba14e174 RS |
431 | && !(p[-1] == ':' |
432 | /* handle the "/:d:foo" and "/:foo" cases correctly */ | |
433 | && ((p == beg + 2 && !IS_DIRECTORY_SEP (*beg)) | |
434 | || (p == beg + 4 && IS_DIRECTORY_SEP (*beg)))) | |
199607e4 | 435 | #endif |
570d7624 JB |
436 | ) p--; |
437 | ||
438 | if (p == beg) | |
439 | return Qnil; | |
5e570b75 | 440 | #ifdef DOS_NT |
4c3c22f3 | 441 | /* Expansion of "c:" to drive and default directory. */ |
ba14e174 | 442 | if (p[-1] == ':') |
4c3c22f3 | 443 | { |
4c3c22f3 | 444 | /* MAXPATHLEN+1 is guaranteed to be enough space for getdefdir. */ |
5976c3fe PE |
445 | char *res = alloca (MAXPATHLEN + 1); |
446 | char *r = res; | |
ba14e174 RS |
447 | |
448 | if (p == beg + 4 && IS_DIRECTORY_SEP (*beg) && beg[1] == ':') | |
449 | { | |
e99a530f | 450 | memcpy (res, beg, 2); |
ba14e174 RS |
451 | beg += 2; |
452 | r += 2; | |
453 | } | |
454 | ||
620f13b0 | 455 | if (getdefdir (c_toupper (*beg) - 'A' + 1, r)) |
4c3c22f3 | 456 | { |
e7ac588e EZ |
457 | size_t l = strlen (res); |
458 | ||
459 | if (l > 3 || !IS_DIRECTORY_SEP (res[l - 1])) | |
4c3c22f3 RS |
460 | strcat (res, "/"); |
461 | beg = res; | |
462 | p = beg + strlen (beg); | |
1fd201bb | 463 | dostounix_filename (beg); |
f5c81c80 EZ |
464 | tem_fn = make_specified_string (beg, -1, p - beg, |
465 | STRING_MULTIBYTE (filename)); | |
4c3c22f3 | 466 | } |
f5c81c80 EZ |
467 | else |
468 | tem_fn = make_specified_string (beg - 2, -1, p - beg + 2, | |
469 | STRING_MULTIBYTE (filename)); | |
470 | } | |
471 | else if (STRING_MULTIBYTE (filename)) | |
472 | { | |
e7ac588e | 473 | tem_fn = make_specified_string (beg, -1, p - beg, 1); |
1fd201bb | 474 | dostounix_filename (SSDATA (tem_fn)); |
e7ac588e EZ |
475 | #ifdef WINDOWSNT |
476 | if (!NILP (Vw32_downcase_file_names)) | |
477 | tem_fn = Fdowncase (tem_fn); | |
478 | #endif | |
f5c81c80 EZ |
479 | } |
480 | else | |
481 | { | |
1fd201bb | 482 | dostounix_filename (beg); |
f5c81c80 | 483 | tem_fn = make_specified_string (beg, -1, p - beg, 0); |
4c3c22f3 | 484 | } |
f5c81c80 | 485 | return tem_fn; |
273ac8d1 | 486 | #else /* DOS_NT */ |
d7231f93 | 487 | return make_specified_string (beg, -1, p - beg, STRING_MULTIBYTE (filename)); |
273ac8d1 | 488 | #endif /* DOS_NT */ |
570d7624 JB |
489 | } |
490 | ||
a7ca3326 | 491 | DEFUN ("file-name-nondirectory", Ffile_name_nondirectory, |
60d67b83 | 492 | Sfile_name_nondirectory, 1, 1, 0, |
8c1a1077 PJ |
493 | doc: /* Return file name FILENAME sans its directory. |
494 | For example, in a Unix-syntax file name, | |
495 | this is everything after the last slash, | |
496 | or the entire name if it contains no slash. */) | |
5842a27b | 497 | (Lisp_Object filename) |
570d7624 | 498 | { |
5976c3fe | 499 | register const char *beg, *p, *end; |
0bf2eed2 | 500 | Lisp_Object handler; |
570d7624 | 501 | |
b7826503 | 502 | CHECK_STRING (filename); |
570d7624 | 503 | |
0bf2eed2 RS |
504 | /* If the file name has special constructs in it, |
505 | call the corresponding file handler. */ | |
3b7f6e60 | 506 | handler = Ffind_file_name_handler (filename, Qfile_name_nondirectory); |
0bf2eed2 | 507 | if (!NILP (handler)) |
2375c96a CY |
508 | { |
509 | Lisp_Object handled_name = call2 (handler, Qfile_name_nondirectory, | |
510 | filename); | |
511 | if (STRINGP (handled_name)) | |
512 | return handled_name; | |
513 | error ("Invalid handler in `file-name-handler-alist'"); | |
514 | } | |
0bf2eed2 | 515 | |
5976c3fe | 516 | beg = SSDATA (filename); |
d5db4077 | 517 | end = p = beg + SBYTES (filename); |
570d7624 | 518 | |
199607e4 | 519 | while (p != beg && !IS_DIRECTORY_SEP (p[-1]) |
199607e4 | 520 | #ifdef DOS_NT |
e1dbe924 | 521 | /* only recognize drive specifier at beginning */ |
ba14e174 RS |
522 | && !(p[-1] == ':' |
523 | /* handle the "/:d:foo" case correctly */ | |
524 | && (p == beg + 2 || (p == beg + 4 && IS_DIRECTORY_SEP (*beg)))) | |
199607e4 | 525 | #endif |
60d67b83 RS |
526 | ) |
527 | p--; | |
570d7624 | 528 | |
d7231f93 | 529 | return make_specified_string (p, -1, end - p, STRING_MULTIBYTE (filename)); |
570d7624 | 530 | } |
642ef245 | 531 | |
a7ca3326 | 532 | DEFUN ("unhandled-file-name-directory", Funhandled_file_name_directory, |
60d67b83 | 533 | Sunhandled_file_name_directory, 1, 1, 0, |
8c1a1077 PJ |
534 | doc: /* Return a directly usable directory name somehow associated with FILENAME. |
535 | A `directly usable' directory name is one that may be used without the | |
536 | intervention of any file handler. | |
537 | If FILENAME is a directly usable file itself, return | |
538 | \(file-name-directory FILENAME). | |
ca319910 SM |
539 | If FILENAME refers to a file which is not accessible from a local process, |
540 | then this should return nil. | |
8c1a1077 PJ |
541 | The `call-process' and `start-process' functions use this function to |
542 | get a current directory to run processes in. */) | |
5842a27b | 543 | (Lisp_Object filename) |
642ef245 JB |
544 | { |
545 | Lisp_Object handler; | |
546 | ||
547 | /* If the file name has special constructs in it, | |
548 | call the corresponding file handler. */ | |
49307295 | 549 | handler = Ffind_file_name_handler (filename, Qunhandled_file_name_directory); |
642ef245 | 550 | if (!NILP (handler)) |
2375c96a CY |
551 | { |
552 | Lisp_Object handled_name = call2 (handler, Qunhandled_file_name_directory, | |
553 | filename); | |
554 | return STRINGP (handled_name) ? handled_name : Qnil; | |
555 | } | |
642ef245 JB |
556 | |
557 | return Ffile_name_directory (filename); | |
558 | } | |
559 | ||
c365c355 PE |
560 | /* Maximum number of bytes that DST will be longer than SRC |
561 | in file_name_as_directory. This occurs when SRCLEN == 0. */ | |
562 | enum { file_name_as_directory_slop = 2 }; | |
563 | ||
f5c81c80 EZ |
564 | /* Convert from file name SRC of length SRCLEN to directory name in |
565 | DST. MULTIBYTE non-zero means the file name in SRC is a multibyte | |
566 | string. On UNIX, just make sure there is a terminating /. Return | |
567 | the length of DST in bytes. */ | |
570d7624 | 568 | |
c293e30c | 569 | static ptrdiff_t |
f5c81c80 EZ |
570 | file_name_as_directory (char *dst, const char *src, ptrdiff_t srclen, |
571 | bool multibyte) | |
c293e30c DA |
572 | { |
573 | if (srclen == 0) | |
8aa3a244 | 574 | { |
c293e30c DA |
575 | dst[0] = '.'; |
576 | dst[1] = '/'; | |
577 | dst[2] = '\0'; | |
578 | return 2; | |
8aa3a244 RS |
579 | } |
580 | ||
c365c355 | 581 | memcpy (dst, src, srclen); |
c293e30c | 582 | if (!IS_DIRECTORY_SEP (dst[srclen - 1])) |
c365c355 PE |
583 | dst[srclen++] = DIRECTORY_SEP; |
584 | dst[srclen] = 0; | |
199607e4 | 585 | #ifdef DOS_NT |
1fd201bb | 586 | dostounix_filename (dst); |
199607e4 | 587 | #endif |
c293e30c | 588 | return srclen; |
570d7624 JB |
589 | } |
590 | ||
a7ca3326 | 591 | DEFUN ("file-name-as-directory", Ffile_name_as_directory, |
570d7624 | 592 | Sfile_name_as_directory, 1, 1, 0, |
0dac4f85 | 593 | doc: /* Return a string representing the file name FILE interpreted as a directory. |
8c1a1077 PJ |
594 | This operation exists because a directory is also a file, but its name as |
595 | a directory is different from its name as a file. | |
596 | The result can be used as the value of `default-directory' | |
597 | or passed as second argument to `expand-file-name'. | |
7c2fb837 | 598 | For a Unix-syntax file name, just appends a slash. */) |
5842a27b | 599 | (Lisp_Object file) |
570d7624 JB |
600 | { |
601 | char *buf; | |
c293e30c | 602 | ptrdiff_t length; |
c365c355 PE |
603 | Lisp_Object handler, val; |
604 | USE_SAFE_ALLOCA; | |
570d7624 | 605 | |
b7826503 | 606 | CHECK_STRING (file); |
265a9e55 | 607 | if (NILP (file)) |
570d7624 | 608 | return Qnil; |
0bf2eed2 RS |
609 | |
610 | /* If the file name has special constructs in it, | |
611 | call the corresponding file handler. */ | |
49307295 | 612 | handler = Ffind_file_name_handler (file, Qfile_name_as_directory); |
0bf2eed2 | 613 | if (!NILP (handler)) |
2375c96a CY |
614 | { |
615 | Lisp_Object handled_name = call2 (handler, Qfile_name_as_directory, | |
616 | file); | |
617 | if (STRINGP (handled_name)) | |
618 | return handled_name; | |
619 | error ("Invalid handler in `file-name-handler-alist'"); | |
620 | } | |
0bf2eed2 | 621 | |
e7ac588e EZ |
622 | #ifdef WINDOWSNT |
623 | if (!NILP (Vw32_downcase_file_names)) | |
624 | file = Fdowncase (file); | |
625 | #endif | |
c365c355 | 626 | buf = SAFE_ALLOCA (SBYTES (file) + file_name_as_directory_slop + 1); |
f5c81c80 EZ |
627 | length = file_name_as_directory (buf, SSDATA (file), SBYTES (file), |
628 | STRING_MULTIBYTE (file)); | |
c365c355 PE |
629 | val = make_specified_string (buf, -1, length, STRING_MULTIBYTE (file)); |
630 | SAFE_FREE (); | |
631 | return val; | |
570d7624 JB |
632 | } |
633 | \f | |
f5c81c80 EZ |
634 | /* Convert from directory name SRC of length SRCLEN to file name in |
635 | DST. MULTIBYTE non-zero means the file name in SRC is a multibyte | |
636 | string. On UNIX, just make sure there isn't a terminating /. | |
637 | Return the length of DST in bytes. */ | |
570d7624 | 638 | |
c293e30c | 639 | static ptrdiff_t |
f5c81c80 | 640 | directory_file_name (char *dst, char *src, ptrdiff_t srclen, bool multibyte) |
570d7624 | 641 | { |
570d7624 | 642 | /* Process as Unix format: just remove any final slash. |
c365c355 PE |
643 | But leave "/" and "//" unchanged. */ |
644 | while (srclen > 1 | |
4592782e | 645 | #ifdef DOS_NT |
c365c355 | 646 | && !IS_ANY_SEP (src[srclen - 2]) |
4592782e | 647 | #endif |
c365c355 PE |
648 | && IS_DIRECTORY_SEP (src[srclen - 1]) |
649 | && ! (srclen == 2 && IS_DIRECTORY_SEP (src[0]))) | |
650 | srclen--; | |
651 | ||
652 | memcpy (dst, src, srclen); | |
653 | dst[srclen] = 0; | |
199607e4 | 654 | #ifdef DOS_NT |
1fd201bb | 655 | dostounix_filename (dst); |
125feee8 | 656 | #endif |
c293e30c | 657 | return srclen; |
570d7624 JB |
658 | } |
659 | ||
a7ca3326 | 660 | DEFUN ("directory-file-name", Fdirectory_file_name, Sdirectory_file_name, |
8c1a1077 PJ |
661 | 1, 1, 0, |
662 | doc: /* Returns the file name of the directory named DIRECTORY. | |
663 | This is the name of the file that holds the data for the directory DIRECTORY. | |
664 | This operation exists because a directory is also a file, but its name as | |
665 | a directory is different from its name as a file. | |
7c2fb837 | 666 | In Unix-syntax, this function just removes the final slash. */) |
5842a27b | 667 | (Lisp_Object directory) |
570d7624 JB |
668 | { |
669 | char *buf; | |
c293e30c | 670 | ptrdiff_t length; |
c365c355 PE |
671 | Lisp_Object handler, val; |
672 | USE_SAFE_ALLOCA; | |
570d7624 | 673 | |
b7826503 | 674 | CHECK_STRING (directory); |
570d7624 | 675 | |
265a9e55 | 676 | if (NILP (directory)) |
570d7624 | 677 | return Qnil; |
0bf2eed2 RS |
678 | |
679 | /* If the file name has special constructs in it, | |
680 | call the corresponding file handler. */ | |
49307295 | 681 | handler = Ffind_file_name_handler (directory, Qdirectory_file_name); |
0bf2eed2 | 682 | if (!NILP (handler)) |
2375c96a CY |
683 | { |
684 | Lisp_Object handled_name = call2 (handler, Qdirectory_file_name, | |
685 | directory); | |
686 | if (STRINGP (handled_name)) | |
687 | return handled_name; | |
688 | error ("Invalid handler in `file-name-handler-alist'"); | |
689 | } | |
0bf2eed2 | 690 | |
e7ac588e EZ |
691 | #ifdef WINDOWSNT |
692 | if (!NILP (Vw32_downcase_file_names)) | |
693 | directory = Fdowncase (directory); | |
694 | #endif | |
c365c355 | 695 | buf = SAFE_ALLOCA (SBYTES (directory) + 1); |
f5c81c80 EZ |
696 | length = directory_file_name (buf, SSDATA (directory), SBYTES (directory), |
697 | STRING_MULTIBYTE (directory)); | |
c365c355 PE |
698 | val = make_specified_string (buf, -1, length, STRING_MULTIBYTE (directory)); |
699 | SAFE_FREE (); | |
700 | return val; | |
570d7624 JB |
701 | } |
702 | ||
91433552 | 703 | static const char make_temp_name_tbl[64] = |
3ce839e4 RS |
704 | { |
705 | 'A','B','C','D','E','F','G','H', | |
706 | 'I','J','K','L','M','N','O','P', | |
707 | 'Q','R','S','T','U','V','W','X', | |
708 | 'Y','Z','a','b','c','d','e','f', | |
709 | 'g','h','i','j','k','l','m','n', | |
710 | 'o','p','q','r','s','t','u','v', | |
711 | 'w','x','y','z','0','1','2','3', | |
712 | '4','5','6','7','8','9','-','_' | |
713 | }; | |
cb613bb8 | 714 | |
3ce839e4 RS |
715 | static unsigned make_temp_name_count, make_temp_name_count_initialized_p; |
716 | ||
cb613bb8 | 717 | /* Value is a temporary file name starting with PREFIX, a string. |
efdc16c9 | 718 | |
cb613bb8 GM |
719 | The Emacs process number forms part of the result, so there is |
720 | no danger of generating a name being used by another process. | |
721 | In addition, this function makes an attempt to choose a name | |
722 | which has no existing file. To make this work, PREFIX should be | |
723 | an absolute file name. | |
efdc16c9 | 724 | |
f75d7a91 | 725 | BASE64_P means add the pid as 3 characters in base64 |
cb613bb8 GM |
726 | encoding. In this case, 6 characters will be added to PREFIX to |
727 | form the file name. Otherwise, if Emacs is running on a system | |
728 | with long file names, add the pid as a decimal number. | |
729 | ||
730 | This function signals an error if no unique file name could be | |
731 | generated. */ | |
732 | ||
733 | Lisp_Object | |
f75d7a91 | 734 | make_temp_name (Lisp_Object prefix, bool base64_p) |
570d7624 | 735 | { |
d0065ff1 EZ |
736 | Lisp_Object val, encoded_prefix; |
737 | int len; | |
a81d11a3 | 738 | printmax_t pid; |
5976c3fe | 739 | char *p, *data; |
a81d11a3 | 740 | char pidbuf[INT_BUFSIZE_BOUND (printmax_t)]; |
3ce839e4 | 741 | int pidlen; |
efdc16c9 | 742 | |
b7826503 | 743 | CHECK_STRING (prefix); |
3ce839e4 RS |
744 | |
745 | /* VAL is created by adding 6 characters to PREFIX. The first | |
746 | three are the PID of this process, in base 64, and the second | |
747 | three are incremented if the file already exists. This ensures | |
748 | 262144 unique file names per PID per PREFIX. */ | |
749 | ||
93f4cf88 | 750 | pid = getpid (); |
3ce839e4 | 751 | |
cb613bb8 GM |
752 | if (base64_p) |
753 | { | |
754 | pidbuf[0] = make_temp_name_tbl[pid & 63], pid >>= 6; | |
755 | pidbuf[1] = make_temp_name_tbl[pid & 63], pid >>= 6; | |
756 | pidbuf[2] = make_temp_name_tbl[pid & 63], pid >>= 6; | |
757 | pidlen = 3; | |
758 | } | |
759 | else | |
760 | { | |
3ce839e4 | 761 | #ifdef HAVE_LONG_FILE_NAMES |
a81d11a3 | 762 | pidlen = sprintf (pidbuf, "%"pMd, pid); |
3a3bfb18 | 763 | #else |
cb613bb8 GM |
764 | pidbuf[0] = make_temp_name_tbl[pid & 63], pid >>= 6; |
765 | pidbuf[1] = make_temp_name_tbl[pid & 63], pid >>= 6; | |
766 | pidbuf[2] = make_temp_name_tbl[pid & 63], pid >>= 6; | |
767 | pidlen = 3; | |
3ce839e4 | 768 | #endif |
cb613bb8 | 769 | } |
efdc16c9 | 770 | |
d0065ff1 EZ |
771 | encoded_prefix = ENCODE_FILE (prefix); |
772 | len = SBYTES (encoded_prefix); | |
773 | val = make_uninit_string (len + 3 + pidlen); | |
5976c3fe | 774 | data = SSDATA (val); |
d0065ff1 | 775 | memcpy (data, SSDATA (encoded_prefix), len); |
3ce839e4 RS |
776 | p = data + len; |
777 | ||
72af86bd | 778 | memcpy (p, pidbuf, pidlen); |
3ce839e4 RS |
779 | p += pidlen; |
780 | ||
781 | /* Here we try to minimize useless stat'ing when this function is | |
782 | invoked many times successively with the same PREFIX. We achieve | |
783 | this by initializing count to a random value, and incrementing it | |
f6a492a9 RS |
784 | afterwards. |
785 | ||
786 | We don't want make-temp-name to be called while dumping, | |
787 | because then make_temp_name_count_initialized_p would get set | |
788 | and then make_temp_name_count would not be set when Emacs starts. */ | |
789 | ||
3ce839e4 RS |
790 | if (!make_temp_name_count_initialized_p) |
791 | { | |
327eeec8 | 792 | make_temp_name_count = time (NULL); |
3ce839e4 RS |
793 | make_temp_name_count_initialized_p = 1; |
794 | } | |
795 | ||
796 | while (1) | |
797 | { | |
8a7777fc | 798 | unsigned num = make_temp_name_count; |
3ce839e4 RS |
799 | |
800 | p[0] = make_temp_name_tbl[num & 63], num >>= 6; | |
801 | p[1] = make_temp_name_tbl[num & 63], num >>= 6; | |
802 | p[2] = make_temp_name_tbl[num & 63], num >>= 6; | |
803 | ||
8a7777fc RS |
804 | /* Poor man's congruential RN generator. Replace with |
805 | ++make_temp_name_count for debugging. */ | |
806 | make_temp_name_count += 25229; | |
807 | make_temp_name_count %= 225307; | |
808 | ||
bb385a92 | 809 | if (!check_existing (data)) |
3ce839e4 RS |
810 | { |
811 | /* We want to return only if errno is ENOENT. */ | |
812 | if (errno == ENOENT) | |
d0065ff1 | 813 | return DECODE_FILE (val); |
3ce839e4 RS |
814 | else |
815 | /* The error here is dubious, but there is little else we | |
816 | can do. The alternatives are to return nil, which is | |
817 | as bad as (and in many cases worse than) throwing the | |
818 | error, or to ignore the error, which will likely result | |
8a7777fc | 819 | in looping through 225307 stat's, which is not only |
410ed5c3 PE |
820 | dog-slow, but also useless since eventually nil would |
821 | have to be returned anyway. */ | |
9869bb0b | 822 | report_file_error ("Cannot create temporary name for prefix", |
a9757f6a | 823 | prefix); |
3ce839e4 RS |
824 | /* not reached */ |
825 | } | |
826 | } | |
570d7624 | 827 | } |
3ce839e4 | 828 | |
cb613bb8 GM |
829 | |
830 | DEFUN ("make-temp-name", Fmake_temp_name, Smake_temp_name, 1, 1, 0, | |
8c1a1077 PJ |
831 | doc: /* Generate temporary file name (string) starting with PREFIX (a string). |
832 | The Emacs process number forms part of the result, | |
833 | so there is no danger of generating a name being used by another process. | |
834 | ||
835 | In addition, this function makes an attempt to choose a name | |
836 | which has no existing file. To make this work, | |
837 | PREFIX should be an absolute file name. | |
838 | ||
839 | There is a race condition between calling `make-temp-name' and creating the | |
840 | file which opens all kinds of security holes. For that reason, you should | |
f9e6f049 RS |
841 | probably use `make-temp-file' instead, except in three circumstances: |
842 | ||
843 | * If you are creating the file in the user's home directory. | |
844 | * If you are creating a directory rather than an ordinary file. | |
845 | * If you are taking special precautions as `make-temp-file' does. */) | |
5842a27b | 846 | (Lisp_Object prefix) |
cb613bb8 GM |
847 | { |
848 | return make_temp_name (prefix, 0); | |
849 | } | |
850 | ||
851 | ||
570d7624 | 852 | \f |
a7ca3326 | 853 | DEFUN ("expand-file-name", Fexpand_file_name, Sexpand_file_name, 1, 2, 0, |
8c1a1077 PJ |
854 | doc: /* Convert filename NAME to absolute, and canonicalize it. |
855 | Second arg DEFAULT-DIRECTORY is directory to start with if NAME is relative | |
d177e213 XF |
856 | \(does not start with slash or tilde); both the directory name and |
857 | a directory's file name are accepted. If DEFAULT-DIRECTORY is nil or | |
858 | missing, the current buffer's value of `default-directory' is used. | |
1b2a627f EZ |
859 | NAME should be a string that is a valid file name for the underlying |
860 | filesystem. | |
8c1a1077 PJ |
861 | File name components that are `.' are removed, and |
862 | so are file name components followed by `..', along with the `..' itself; | |
863 | note that these simplifications are done without checking the resulting | |
864 | file names in the file system. | |
15579471 EZ |
865 | Multiple consecutive slashes are collapsed into a single slash, |
866 | except at the beginning of the file name when they are significant (e.g., | |
867 | UNC file names on MS-Windows.) | |
8c1a1077 PJ |
868 | An initial `~/' expands to your home directory. |
869 | An initial `~USER/' expands to USER's home directory. | |
07114296 CY |
870 | See also the function `substitute-in-file-name'. |
871 | ||
872 | For technical reasons, this function can return correct but | |
873 | non-intuitive results for the root directory; for instance, | |
874 | \(expand-file-name ".." "/") returns "/..". For this reason, use | |
15579471 | 875 | \(directory-file-name (file-name-directory dirname)) to traverse a |
07114296 | 876 | filesystem tree, not (expand-file-name ".." dirname). */) |
5842a27b | 877 | (Lisp_Object name, Lisp_Object default_directory) |
570d7624 | 878 | { |
5b5a2ea1 SM |
879 | /* These point to SDATA and need to be careful with string-relocation |
880 | during GC (via DECODE_FILE). */ | |
2893f146 PE |
881 | char *nm; |
882 | const char *newdir; | |
5b5a2ea1 | 883 | /* This should only point to alloca'd data. */ |
5976c3fe | 884 | char *target; |
199607e4 | 885 | |
93f4cf88 | 886 | ptrdiff_t tlen; |
570d7624 | 887 | struct passwd *pw; |
5e570b75 | 888 | #ifdef DOS_NT |
199607e4 | 889 | int drive = 0; |
f75d7a91 PE |
890 | bool collapse_newdir = 1; |
891 | bool is_escaped = 0; | |
5e570b75 | 892 | #endif /* DOS_NT */ |
93f4cf88 | 893 | ptrdiff_t length; |
2375c96a | 894 | Lisp_Object handler, result, handled_name; |
fce31d69 | 895 | bool multibyte; |
9c06a1f3 | 896 | Lisp_Object hdir; |
c365c355 | 897 | USE_SAFE_ALLOCA; |
199607e4 | 898 | |
b7826503 | 899 | CHECK_STRING (name); |
570d7624 | 900 | |
0bf2eed2 RS |
901 | /* If the file name has special constructs in it, |
902 | call the corresponding file handler. */ | |
49307295 | 903 | handler = Ffind_file_name_handler (name, Qexpand_file_name); |
0bf2eed2 | 904 | if (!NILP (handler)) |
2375c96a CY |
905 | { |
906 | handled_name = call3 (handler, Qexpand_file_name, | |
907 | name, default_directory); | |
908 | if (STRINGP (handled_name)) | |
909 | return handled_name; | |
910 | error ("Invalid handler in `file-name-handler-alist'"); | |
911 | } | |
912 | ||
58fc9587 | 913 | |
3b7f6e60 EN |
914 | /* Use the buffer's default-directory if DEFAULT_DIRECTORY is omitted. */ |
915 | if (NILP (default_directory)) | |
4b4deea2 | 916 | default_directory = BVAR (current_buffer, directory); |
82330e7f | 917 | if (! STRINGP (default_directory)) |
dd693537 EZ |
918 | { |
919 | #ifdef DOS_NT | |
920 | /* "/" is not considered a root directory on DOS_NT, so using "/" | |
921 | here causes an infinite recursion in, e.g., the following: | |
922 | ||
923 | (let (default-directory) | |
924 | (expand-file-name "a")) | |
925 | ||
926 | To avoid this, we set default_directory to the root of the | |
927 | current drive. */ | |
dd693537 EZ |
928 | default_directory = build_string (emacs_root_dir ()); |
929 | #else | |
930 | default_directory = build_string ("/"); | |
931 | #endif | |
932 | } | |
58fc9587 | 933 | |
3b7f6e60 | 934 | if (!NILP (default_directory)) |
273e0829 | 935 | { |
3b7f6e60 | 936 | handler = Ffind_file_name_handler (default_directory, Qexpand_file_name); |
273e0829 | 937 | if (!NILP (handler)) |
2375c96a CY |
938 | { |
939 | handled_name = call3 (handler, Qexpand_file_name, | |
940 | name, default_directory); | |
941 | if (STRINGP (handled_name)) | |
942 | return handled_name; | |
943 | error ("Invalid handler in `file-name-handler-alist'"); | |
944 | } | |
273e0829 | 945 | } |
0bf2eed2 | 946 | |
5b5a2ea1 | 947 | { |
5976c3fe | 948 | char *o = SSDATA (default_directory); |
5b5a2ea1 SM |
949 | |
950 | /* Make sure DEFAULT_DIRECTORY is properly expanded. | |
951 | It would be better to do this down below where we actually use | |
952 | default_directory. Unfortunately, calling Fexpand_file_name recursively | |
953 | could invoke GC, and the strings might be relocated. This would | |
954 | be annoying because we have pointers into strings lying around | |
955 | that would need adjusting, and people would add new pointers to | |
956 | the code and forget to adjust them, resulting in intermittent bugs. | |
957 | Putting this call here avoids all that crud. | |
958 | ||
959 | The EQ test avoids infinite recursion. */ | |
960 | if (! NILP (default_directory) && !EQ (default_directory, name) | |
961 | /* Save time in some common cases - as long as default_directory | |
962 | is not relative, it can be canonicalized with name below (if it | |
963 | is needed at all) without requiring it to be expanded now. */ | |
01937013 | 964 | #ifdef DOS_NT |
5b5a2ea1 SM |
965 | /* Detect MSDOS file names with drive specifiers. */ |
966 | && ! (IS_DRIVE (o[0]) && IS_DEVICE_SEP (o[1]) | |
967 | && IS_DIRECTORY_SEP (o[2])) | |
199607e4 | 968 | #ifdef WINDOWSNT |
5b5a2ea1 SM |
969 | /* Detect Windows file names in UNC format. */ |
970 | && ! (IS_DIRECTORY_SEP (o[0]) && IS_DIRECTORY_SEP (o[1])) | |
01937013 | 971 | #endif |
199607e4 RS |
972 | #else /* not DOS_NT */ |
973 | /* Detect Unix absolute file names (/... alone is not absolute on | |
974 | DOS or Windows). */ | |
5b5a2ea1 | 975 | && ! (IS_DIRECTORY_SEP (o[0])) |
199607e4 | 976 | #endif /* not DOS_NT */ |
5b5a2ea1 SM |
977 | ) |
978 | { | |
979 | struct gcpro gcpro1; | |
f14b1c68 | 980 | |
5b5a2ea1 SM |
981 | GCPRO1 (name); |
982 | default_directory = Fexpand_file_name (default_directory, Qnil); | |
983 | UNGCPRO; | |
984 | } | |
985 | } | |
2b046a72 | 986 | multibyte = STRING_MULTIBYTE (name); |
6d060996 KH |
987 | if (multibyte != STRING_MULTIBYTE (default_directory)) |
988 | { | |
989 | if (multibyte) | |
d0065ff1 EZ |
990 | { |
991 | unsigned char *p = SDATA (name); | |
992 | ||
993 | while (*p && ASCII_BYTE_P (*p)) | |
994 | p++; | |
995 | if (*p == '\0') | |
996 | { | |
997 | /* NAME is a pure ASCII string, and DEFAULT_DIRECTORY is | |
998 | unibyte. Do not convert DEFAULT_DIRECTORY to | |
999 | multibyte; instead, convert NAME to a unibyte string, | |
1000 | so that the result of this function is also a unibyte | |
a67c4ae0 | 1001 | string. This is needed during bootstrapping and |
d0065ff1 EZ |
1002 | dumping, when Emacs cannot decode file names, because |
1003 | the locale environment is not set up. */ | |
1004 | name = make_unibyte_string (SSDATA (name), SBYTES (name)); | |
1005 | multibyte = 0; | |
1006 | } | |
1007 | else | |
1008 | default_directory = string_to_multibyte (default_directory); | |
1009 | } | |
6d060996 KH |
1010 | else |
1011 | { | |
1012 | name = string_to_multibyte (name); | |
1013 | multibyte = 1; | |
1014 | } | |
1015 | } | |
1016 | ||
e7ac588e EZ |
1017 | #ifdef WINDOWSNT |
1018 | if (!NILP (Vw32_downcase_file_names)) | |
1019 | default_directory = Fdowncase (default_directory); | |
1020 | #endif | |
1021 | ||
e8d32c7e | 1022 | /* Make a local copy of nm[] to protect it from GC in DECODE_FILE below. */ |
5b71542d | 1023 | nm = xlispstrdupa (name); |
199607e4 | 1024 | |
565f0b98 | 1025 | #ifdef DOS_NT |
f0f95d31 RS |
1026 | /* Note if special escape prefix is present, but remove for now. */ |
1027 | if (nm[0] == '/' && nm[1] == ':') | |
1028 | { | |
1029 | is_escaped = 1; | |
1030 | nm += 2; | |
1031 | } | |
1032 | ||
199607e4 | 1033 | /* Find and remove drive specifier if present; this makes nm absolute |
f0f95d31 RS |
1034 | even if the rest of the name appears to be relative. Only look for |
1035 | drive specifier at the beginning. */ | |
1036 | if (IS_DRIVE (nm[0]) && IS_DEVICE_SEP (nm[1])) | |
1037 | { | |
5976c3fe | 1038 | drive = (unsigned char) nm[0]; |
f0f95d31 RS |
1039 | nm += 2; |
1040 | } | |
bb1ff1f4 GV |
1041 | |
1042 | #ifdef WINDOWSNT | |
1043 | /* If we see "c://somedir", we want to strip the first slash after the | |
1044 | colon when stripping the drive letter. Otherwise, this expands to | |
1045 | "//somedir". */ | |
1046 | if (drive && IS_DIRECTORY_SEP (nm[0]) && IS_DIRECTORY_SEP (nm[1])) | |
1047 | nm++; | |
4c3c22f3 | 1048 | |
e8d32c7e | 1049 | /* Discard any previous drive specifier if nm is now in UNC format. */ |
199607e4 RS |
1050 | if (IS_DIRECTORY_SEP (nm[0]) && IS_DIRECTORY_SEP (nm[1])) |
1051 | { | |
1052 | drive = 0; | |
1053 | } | |
5b5a2ea1 SM |
1054 | #endif /* WINDOWSNT */ |
1055 | #endif /* DOS_NT */ | |
199607e4 | 1056 | |
214378ec GM |
1057 | /* If nm is absolute, look for `/./' or `/../' or `//''sequences; if |
1058 | none are found, we can probably return right away. We will avoid | |
1059 | allocating a new string if name is already fully expanded. */ | |
570d7624 | 1060 | if ( |
5e570b75 | 1061 | IS_DIRECTORY_SEP (nm[0]) |
199607e4 | 1062 | #ifdef MSDOS |
f0f95d31 | 1063 | && drive && !is_escaped |
199607e4 RS |
1064 | #endif |
1065 | #ifdef WINDOWSNT | |
f0f95d31 | 1066 | && (drive || IS_DIRECTORY_SEP (nm[1])) && !is_escaped |
199607e4 | 1067 | #endif |
570d7624 JB |
1068 | ) |
1069 | { | |
f14b1c68 JB |
1070 | /* If it turns out that the filename we want to return is just a |
1071 | suffix of FILENAME, we don't need to go through and edit | |
1072 | things; we just need to construct a new string using data | |
f75d7a91 PE |
1073 | starting at the middle of FILENAME. If we set LOSE, that |
1074 | means we've discovered that we can't do that cool trick. */ | |
1075 | bool lose = 0; | |
5976c3fe | 1076 | char *p = nm; |
f14b1c68 | 1077 | |
570d7624 JB |
1078 | while (*p) |
1079 | { | |
199607e4 | 1080 | /* Since we know the name is absolute, we can assume that each |
c77d647e JB |
1081 | element starts with a "/". */ |
1082 | ||
c77d647e | 1083 | /* "." and ".." are hairy. */ |
5e570b75 | 1084 | if (IS_DIRECTORY_SEP (p[0]) |
c77d647e | 1085 | && p[1] == '.' |
5e570b75 | 1086 | && (IS_DIRECTORY_SEP (p[2]) |
c77d647e | 1087 | || p[2] == 0 |
5e570b75 | 1088 | || (p[2] == '.' && (IS_DIRECTORY_SEP (p[3]) |
c77d647e | 1089 | || p[3] == 0)))) |
570d7624 | 1090 | lose = 1; |
c365c355 PE |
1091 | /* Replace multiple slashes with a single one, except |
1092 | leave leading "//" alone. */ | |
1093 | else if (IS_DIRECTORY_SEP (p[0]) | |
1094 | && IS_DIRECTORY_SEP (p[1]) | |
1095 | && (p != nm || IS_DIRECTORY_SEP (p[2]))) | |
214378ec | 1096 | lose = 1; |
570d7624 JB |
1097 | p++; |
1098 | } | |
1099 | if (!lose) | |
1100 | { | |
199607e4 | 1101 | #ifdef DOS_NT |
087fc47a JB |
1102 | /* Make sure directories are all separated with /, but |
1103 | avoid allocation of a new string when not required. */ | |
1fd201bb | 1104 | dostounix_filename (nm); |
199607e4 RS |
1105 | #ifdef WINDOWSNT |
1106 | if (IS_DIRECTORY_SEP (nm[1])) | |
1107 | { | |
42a5b22f | 1108 | if (strcmp (nm, SSDATA (name)) != 0) |
2b046a72 | 1109 | name = make_specified_string (nm, -1, strlen (nm), multibyte); |
199607e4 RS |
1110 | } |
1111 | else | |
1112 | #endif | |
e8d32c7e | 1113 | /* Drive must be set, so this is okay. */ |
5976c3fe | 1114 | if (strcmp (nm - 2, SSDATA (name)) != 0) |
199607e4 | 1115 | { |
3f817c73 KH |
1116 | char temp[] = " :"; |
1117 | ||
2b046a72 | 1118 | name = make_specified_string (nm, -1, p - nm, multibyte); |
3f817c73 KH |
1119 | temp[0] = DRIVE_LETTER (drive); |
1120 | name = concat2 (build_string (temp), name); | |
199607e4 | 1121 | } |
e7ac588e EZ |
1122 | #ifdef WINDOWSNT |
1123 | if (!NILP (Vw32_downcase_file_names)) | |
1124 | name = Fdowncase (name); | |
1125 | #endif | |
199607e4 RS |
1126 | return name; |
1127 | #else /* not DOS_NT */ | |
42a5b22f | 1128 | if (strcmp (nm, SSDATA (name)) == 0) |
570d7624 | 1129 | return name; |
2b046a72 | 1130 | return make_specified_string (nm, -1, strlen (nm), multibyte); |
5e570b75 | 1131 | #endif /* not DOS_NT */ |
570d7624 JB |
1132 | } |
1133 | } | |
1134 | ||
199607e4 RS |
1135 | /* At this point, nm might or might not be an absolute file name. We |
1136 | need to expand ~ or ~user if present, otherwise prefix nm with | |
1137 | default_directory if nm is not absolute, and finally collapse /./ | |
1138 | and /foo/../ sequences. | |
1139 | ||
1140 | We set newdir to be the appropriate prefix if one is needed: | |
1141 | - the relevant user directory if nm starts with ~ or ~user | |
1142 | - the specified drive's working dir (DOS/NT only) if nm does not | |
1143 | start with / | |
1144 | - the value of default_directory. | |
1145 | ||
1146 | Note that these prefixes are not guaranteed to be absolute (except | |
1147 | for the working dir of a drive). Therefore, to ensure we always | |
1148 | return an absolute name, if the final prefix is not absolute we | |
1149 | append it to the current working directory. */ | |
570d7624 JB |
1150 | |
1151 | newdir = 0; | |
1152 | ||
1153 | if (nm[0] == '~') /* prefix ~ */ | |
c77d647e | 1154 | { |
5e570b75 | 1155 | if (IS_DIRECTORY_SEP (nm[1]) |
c77d647e JB |
1156 | || nm[1] == 0) /* ~ by itself */ |
1157 | { | |
6d557778 EZ |
1158 | Lisp_Object tem; |
1159 | ||
5976c3fe PE |
1160 | if (!(newdir = egetenv ("HOME"))) |
1161 | newdir = ""; | |
199607e4 | 1162 | nm++; |
e8d32c7e | 1163 | /* `egetenv' may return a unibyte string, which will bite us since |
6d557778 | 1164 | we expect the directory to be multibyte. */ |
857fd372 EZ |
1165 | #ifdef WINDOWSNT |
1166 | if (newdir[0]) | |
1167 | { | |
1168 | char newdir_utf8[MAX_UTF8_PATH]; | |
1169 | ||
1170 | filename_from_ansi (newdir, newdir_utf8); | |
1171 | tem = build_string (newdir_utf8); | |
1172 | } | |
1173 | else | |
857fd372 | 1174 | #endif |
db50ad5f | 1175 | tem = build_string (newdir); |
f5c81c80 | 1176 | if (multibyte && !STRING_MULTIBYTE (tem)) |
9c06a1f3 EZ |
1177 | { |
1178 | hdir = DECODE_FILE (tem); | |
5976c3fe | 1179 | newdir = SSDATA (hdir); |
9c06a1f3 | 1180 | } |
5e570b75 | 1181 | #ifdef DOS_NT |
9a1dc3be | 1182 | collapse_newdir = 0; |
4c3c22f3 | 1183 | #endif |
c77d647e JB |
1184 | } |
1185 | else /* ~user/filename */ | |
1186 | { | |
5976c3fe | 1187 | char *o, *p; |
c365c355 PE |
1188 | for (p = nm; *p && !IS_DIRECTORY_SEP (*p); p++) |
1189 | continue; | |
1190 | o = SAFE_ALLOCA (p - nm + 1); | |
72af86bd | 1191 | memcpy (o, nm, p - nm); |
c365c355 | 1192 | o[p - nm] = 0; |
c77d647e | 1193 | |
4d7e6e51 | 1194 | block_input (); |
350e0088 | 1195 | pw = getpwnam (o + 1); |
4d7e6e51 | 1196 | unblock_input (); |
c77d647e JB |
1197 | if (pw) |
1198 | { | |
f5c81c80 EZ |
1199 | Lisp_Object tem; |
1200 | ||
5976c3fe | 1201 | newdir = pw->pw_dir; |
f5c81c80 EZ |
1202 | /* `getpwnam' may return a unibyte string, which will |
1203 | bite us since we expect the directory to be | |
1204 | multibyte. */ | |
1205 | tem = build_string (newdir); | |
1206 | if (multibyte && !STRING_MULTIBYTE (tem)) | |
1207 | { | |
1208 | hdir = DECODE_FILE (tem); | |
1209 | newdir = SSDATA (hdir); | |
1210 | } | |
c77d647e | 1211 | nm = p; |
199607e4 | 1212 | #ifdef DOS_NT |
9a1dc3be | 1213 | collapse_newdir = 0; |
199607e4 | 1214 | #endif |
c77d647e | 1215 | } |
e5d77022 | 1216 | |
c77d647e JB |
1217 | /* If we don't find a user of that name, leave the name |
1218 | unchanged; don't move nm forward to p. */ | |
1219 | } | |
1220 | } | |
570d7624 | 1221 | |
5e570b75 | 1222 | #ifdef DOS_NT |
199607e4 RS |
1223 | /* On DOS and Windows, nm is absolute if a drive name was specified; |
1224 | use the drive's current directory as the prefix if needed. */ | |
1225 | if (!newdir && drive) | |
1226 | { | |
e8d32c7e | 1227 | /* Get default directory if needed to make nm absolute. */ |
2893f146 | 1228 | char *adir = NULL; |
199607e4 RS |
1229 | if (!IS_DIRECTORY_SEP (nm[0])) |
1230 | { | |
2893f146 | 1231 | adir = alloca (MAXPATHLEN + 1); |
620f13b0 | 1232 | if (!getdefdir (c_toupper (drive) - 'A' + 1, adir)) |
2893f146 | 1233 | adir = NULL; |
f5c81c80 EZ |
1234 | else if (multibyte) |
1235 | { | |
1236 | Lisp_Object tem = build_string (adir); | |
1237 | ||
1238 | tem = DECODE_FILE (tem); | |
1239 | memcpy (adir, SSDATA (tem), SBYTES (tem) + 1); | |
1240 | } | |
199607e4 | 1241 | } |
2893f146 | 1242 | if (!adir) |
199607e4 | 1243 | { |
e8d32c7e | 1244 | /* Either nm starts with /, or drive isn't mounted. */ |
2893f146 PE |
1245 | adir = alloca (4); |
1246 | adir[0] = DRIVE_LETTER (drive); | |
1247 | adir[1] = ':'; | |
1248 | adir[2] = '/'; | |
1249 | adir[3] = 0; | |
199607e4 | 1250 | } |
2893f146 | 1251 | newdir = adir; |
199607e4 | 1252 | } |
5e570b75 | 1253 | #endif /* DOS_NT */ |
199607e4 RS |
1254 | |
1255 | /* Finally, if no prefix has been specified and nm is not absolute, | |
e8d32c7e | 1256 | then it must be expanded relative to default_directory. */ |
199607e4 | 1257 | |
34097368 | 1258 | if (1 |
199607e4 | 1259 | #ifndef DOS_NT |
e8d32c7e | 1260 | /* /... alone is not absolute on DOS and Windows. */ |
34097368 | 1261 | && !IS_DIRECTORY_SEP (nm[0]) |
199607e4 RS |
1262 | #endif |
1263 | #ifdef WINDOWSNT | |
34097368 | 1264 | && !(IS_DIRECTORY_SEP (nm[0]) && IS_DIRECTORY_SEP (nm[1])) |
199607e4 | 1265 | #endif |
570d7624 JB |
1266 | && !newdir) |
1267 | { | |
5976c3fe | 1268 | newdir = SSDATA (default_directory); |
f0f95d31 RS |
1269 | #ifdef DOS_NT |
1270 | /* Note if special escape prefix is present, but remove for now. */ | |
1271 | if (newdir[0] == '/' && newdir[1] == ':') | |
1272 | { | |
1273 | is_escaped = 1; | |
1274 | newdir += 2; | |
1275 | } | |
1276 | #endif | |
570d7624 JB |
1277 | } |
1278 | ||
5e570b75 | 1279 | #ifdef DOS_NT |
199607e4 RS |
1280 | if (newdir) |
1281 | { | |
e8d32c7e | 1282 | /* First ensure newdir is an absolute name. */ |
199607e4 RS |
1283 | if ( |
1284 | /* Detect MSDOS file names with drive specifiers. */ | |
1285 | ! (IS_DRIVE (newdir[0]) | |
1286 | && IS_DEVICE_SEP (newdir[1]) && IS_DIRECTORY_SEP (newdir[2])) | |
1287 | #ifdef WINDOWSNT | |
1288 | /* Detect Windows file names in UNC format. */ | |
1289 | && ! (IS_DIRECTORY_SEP (newdir[0]) && IS_DIRECTORY_SEP (newdir[1])) | |
1290 | #endif | |
1291 | ) | |
1292 | { | |
1293 | /* Effectively, let newdir be (expand-file-name newdir cwd). | |
1294 | Because of the admonition against calling expand-file-name | |
1295 | when we have pointers into lisp strings, we accomplish this | |
1296 | indirectly by prepending newdir to nm if necessary, and using | |
e8d32c7e | 1297 | cwd (or the wd of newdir's drive) as the new newdir. */ |
2893f146 | 1298 | char *adir; |
5c4a19a9 EZ |
1299 | #ifdef WINDOWSNT |
1300 | const int adir_size = MAX_UTF8_PATH; | |
1301 | #else | |
1302 | const int adir_size = MAXPATHLEN + 1; | |
1303 | #endif | |
f5c81c80 | 1304 | |
c70a4df6 | 1305 | if (IS_DRIVE (newdir[0]) && IS_DEVICE_SEP (newdir[1])) |
199607e4 | 1306 | { |
5976c3fe | 1307 | drive = (unsigned char) newdir[0]; |
199607e4 RS |
1308 | newdir += 2; |
1309 | } | |
1310 | if (!IS_DIRECTORY_SEP (nm[0])) | |
1311 | { | |
c293e30c | 1312 | ptrdiff_t newlen = strlen (newdir); |
c365c355 PE |
1313 | char *tmp = alloca (newlen + file_name_as_directory_slop |
1314 | + strlen (nm) + 1); | |
f5c81c80 | 1315 | file_name_as_directory (tmp, newdir, newlen, multibyte); |
199607e4 RS |
1316 | strcat (tmp, nm); |
1317 | nm = tmp; | |
1318 | } | |
5c4a19a9 | 1319 | adir = alloca (adir_size); |
199607e4 RS |
1320 | if (drive) |
1321 | { | |
620f13b0 | 1322 | if (!getdefdir (c_toupper (drive) - 'A' + 1, adir)) |
f5c81c80 | 1323 | strcpy (adir, "/"); |
199607e4 RS |
1324 | } |
1325 | else | |
5c4a19a9 | 1326 | getcwd (adir, adir_size); |
f5c81c80 EZ |
1327 | if (multibyte) |
1328 | { | |
1329 | Lisp_Object tem = build_string (adir); | |
1330 | ||
1331 | tem = DECODE_FILE (tem); | |
1332 | memcpy (adir, SSDATA (tem), SBYTES (tem) + 1); | |
1333 | } | |
2893f146 | 1334 | newdir = adir; |
199607e4 RS |
1335 | } |
1336 | ||
e8d32c7e | 1337 | /* Strip off drive name from prefix, if present. */ |
c70a4df6 | 1338 | if (IS_DRIVE (newdir[0]) && IS_DEVICE_SEP (newdir[1])) |
199607e4 RS |
1339 | { |
1340 | drive = newdir[0]; | |
1341 | newdir += 2; | |
1342 | } | |
1343 | ||
1344 | /* Keep only a prefix from newdir if nm starts with slash | |
82330e7f | 1345 | (//server/share for UNC, nothing otherwise). */ |
9a1dc3be | 1346 | if (IS_DIRECTORY_SEP (nm[0]) && collapse_newdir) |
199607e4 RS |
1347 | { |
1348 | #ifdef WINDOWSNT | |
1349 | if (IS_DIRECTORY_SEP (newdir[0]) && IS_DIRECTORY_SEP (newdir[1])) | |
1350 | { | |
2893f146 PE |
1351 | char *adir = strcpy (alloca (strlen (newdir) + 1), newdir); |
1352 | char *p = adir + 2; | |
199607e4 RS |
1353 | while (*p && !IS_DIRECTORY_SEP (*p)) p++; |
1354 | p++; | |
1355 | while (*p && !IS_DIRECTORY_SEP (*p)) p++; | |
1356 | *p = 0; | |
2893f146 | 1357 | newdir = adir; |
199607e4 RS |
1358 | } |
1359 | else | |
1360 | #endif | |
1361 | newdir = ""; | |
1362 | } | |
1363 | } | |
5e570b75 | 1364 | #endif /* DOS_NT */ |
199607e4 RS |
1365 | |
1366 | if (newdir) | |
bfb61299 | 1367 | { |
c365c355 PE |
1368 | /* Ignore any slash at the end of newdir, unless newdir is |
1369 | just "/" or "//". */ | |
199607e4 | 1370 | length = strlen (newdir); |
c365c355 PE |
1371 | while (length > 1 && IS_DIRECTORY_SEP (newdir[length - 1]) |
1372 | && ! (length == 2 && IS_DIRECTORY_SEP (newdir[0]))) | |
1373 | length--; | |
bfb61299 JB |
1374 | } |
1375 | else | |
c365c355 | 1376 | length = 0; |
570d7624 | 1377 | |
e8d32c7e | 1378 | /* Now concatenate the directory and name to new space in the stack frame. */ |
c365c355 | 1379 | tlen = length + file_name_as_directory_slop + strlen (nm) + 1; |
5e570b75 | 1380 | #ifdef DOS_NT |
f0f95d31 RS |
1381 | /* Reserve space for drive specifier and escape prefix, since either |
1382 | or both may need to be inserted. (The Microsoft x86 compiler | |
5e570b75 | 1383 | produces incorrect code if the following two lines are combined.) */ |
38182d90 | 1384 | target = alloca (tlen + 4); |
f0f95d31 | 1385 | target += 4; |
5e570b75 | 1386 | #else /* not DOS_NT */ |
c365c355 | 1387 | target = SAFE_ALLOCA (tlen); |
5e570b75 | 1388 | #endif /* not DOS_NT */ |
570d7624 JB |
1389 | *target = 0; |
1390 | ||
1391 | if (newdir) | |
1392 | { | |
5e570b75 | 1393 | if (nm[0] == 0 || IS_DIRECTORY_SEP (nm[0])) |
f5321b5c | 1394 | { |
3ea2d8b2 | 1395 | #ifdef DOS_NT |
f5321b5c RS |
1396 | /* If newdir is effectively "C:/", then the drive letter will have |
1397 | been stripped and newdir will be "/". Concatenating with an | |
1398 | absolute directory in nm produces "//", which will then be | |
1399 | incorrectly treated as a network share. Ignore newdir in | |
1400 | this case (keeping the drive letter). */ | |
efdc16c9 | 1401 | if (!(drive && nm[0] && IS_DIRECTORY_SEP (newdir[0]) |
f5321b5c RS |
1402 | && newdir[1] == '\0')) |
1403 | #endif | |
c365c355 PE |
1404 | { |
1405 | memcpy (target, newdir, length); | |
1406 | target[length] = 0; | |
1407 | } | |
f5321b5c | 1408 | } |
570d7624 | 1409 | else |
f5c81c80 | 1410 | file_name_as_directory (target, newdir, length, multibyte); |
570d7624 JB |
1411 | } |
1412 | ||
1413 | strcat (target, nm); | |
199607e4 | 1414 | |
214378ec GM |
1415 | /* Now canonicalize by removing `//', `/.' and `/foo/..' if they |
1416 | appear. */ | |
5b5a2ea1 | 1417 | { |
5976c3fe PE |
1418 | char *p = target; |
1419 | char *o = target; | |
570d7624 | 1420 | |
5b5a2ea1 SM |
1421 | while (*p) |
1422 | { | |
5b5a2ea1 SM |
1423 | if (!IS_DIRECTORY_SEP (*p)) |
1424 | { | |
1425 | *o++ = *p++; | |
1426 | } | |
1427 | else if (p[1] == '.' | |
1428 | && (IS_DIRECTORY_SEP (p[2]) | |
1429 | || p[2] == 0)) | |
1430 | { | |
1431 | /* If "/." is the entire filename, keep the "/". Otherwise, | |
1432 | just delete the whole "/.". */ | |
1433 | if (o == target && p[2] == '\0') | |
1434 | *o++ = *p; | |
1435 | p += 2; | |
1436 | } | |
1437 | else if (p[1] == '.' && p[2] == '.' | |
1438 | /* `/../' is the "superroot" on certain file systems. | |
1439 | Turned off on DOS_NT systems because they have no | |
1440 | "superroot" and because this causes us to produce | |
1441 | file names like "d:/../foo" which fail file-related | |
1442 | functions of the underlying OS. (To reproduce, try a | |
1443 | long series of "../../" in default_directory, longer | |
1444 | than the number of levels from the root.) */ | |
aa4060b9 | 1445 | #ifndef DOS_NT |
5b5a2ea1 | 1446 | && o != target |
aa4060b9 | 1447 | #endif |
5b5a2ea1 SM |
1448 | && (IS_DIRECTORY_SEP (p[3]) || p[3] == 0)) |
1449 | { | |
972ed246 | 1450 | #ifdef WINDOWSNT |
5976c3fe | 1451 | char *prev_o = o; |
972ed246 | 1452 | #endif |
7ba11bee PE |
1453 | while (o != target && (--o, !IS_DIRECTORY_SEP (*o))) |
1454 | continue; | |
972ed246 JR |
1455 | #ifdef WINDOWSNT |
1456 | /* Don't go below server level in UNC filenames. */ | |
1457 | if (o == target + 1 && IS_DIRECTORY_SEP (*o) | |
1458 | && IS_DIRECTORY_SEP (*target)) | |
1459 | o = prev_o; | |
1460 | else | |
1461 | #endif | |
5b5a2ea1 SM |
1462 | /* Keep initial / only if this is the whole name. */ |
1463 | if (o == target && IS_ANY_SEP (*o) && p[3] == 0) | |
1464 | ++o; | |
1465 | p += 3; | |
1466 | } | |
c365c355 PE |
1467 | else if (IS_DIRECTORY_SEP (p[1]) |
1468 | && (p != target || IS_DIRECTORY_SEP (p[2]))) | |
1469 | /* Collapse multiple "/", except leave leading "//" alone. */ | |
5b5a2ea1 SM |
1470 | p++; |
1471 | else | |
1472 | { | |
1473 | *o++ = *p++; | |
1474 | } | |
5b5a2ea1 | 1475 | } |
570d7624 | 1476 | |
5e570b75 | 1477 | #ifdef DOS_NT |
e8d32c7e | 1478 | /* At last, set drive name. */ |
5e570b75 | 1479 | #ifdef WINDOWSNT |
5b5a2ea1 SM |
1480 | /* Except for network file name. */ |
1481 | if (!(IS_DIRECTORY_SEP (target[0]) && IS_DIRECTORY_SEP (target[1]))) | |
5e570b75 | 1482 | #endif /* WINDOWSNT */ |
5b5a2ea1 | 1483 | { |
1088b922 | 1484 | if (!drive) emacs_abort (); |
5b5a2ea1 SM |
1485 | target -= 2; |
1486 | target[0] = DRIVE_LETTER (drive); | |
1487 | target[1] = ':'; | |
1488 | } | |
1489 | /* Reinsert the escape prefix if required. */ | |
1490 | if (is_escaped) | |
1491 | { | |
1492 | target -= 2; | |
1493 | target[0] = '/'; | |
1494 | target[1] = ':'; | |
1495 | } | |
5b5a2ea1 | 1496 | result = make_specified_string (target, -1, o - target, multibyte); |
1fd201bb | 1497 | dostounix_filename (SSDATA (result)); |
e7ac588e EZ |
1498 | #ifdef WINDOWSNT |
1499 | if (!NILP (Vw32_downcase_file_names)) | |
1500 | result = Fdowncase (result); | |
1501 | #endif | |
273ac8d1 EZ |
1502 | #else /* !DOS_NT */ |
1503 | result = make_specified_string (target, -1, o - target, multibyte); | |
1504 | #endif /* !DOS_NT */ | |
5b5a2ea1 | 1505 | } |
beb402de KG |
1506 | |
1507 | /* Again look to see if the file name has special constructs in it | |
1508 | and perhaps call the corresponding file handler. This is needed | |
1509 | for filenames such as "/foo/../user@host:/bar/../baz". Expanding | |
1510 | the ".." component gives us "/user@host:/bar/../baz" which needs | |
e8d32c7e | 1511 | to be expanded again. */ |
beb402de KG |
1512 | handler = Ffind_file_name_handler (result, Qexpand_file_name); |
1513 | if (!NILP (handler)) | |
2375c96a CY |
1514 | { |
1515 | handled_name = call3 (handler, Qexpand_file_name, | |
1516 | result, default_directory); | |
c365c355 PE |
1517 | if (! STRINGP (handled_name)) |
1518 | error ("Invalid handler in `file-name-handler-alist'"); | |
1519 | result = handled_name; | |
2375c96a | 1520 | } |
beb402de | 1521 | |
c365c355 | 1522 | SAFE_FREE (); |
beb402de | 1523 | return result; |
570d7624 | 1524 | } |
5e570b75 | 1525 | |
4887597a EZ |
1526 | #if 0 |
1527 | /* PLEASE DO NOT DELETE THIS COMMENTED-OUT VERSION! | |
1528 | This is the old version of expand-file-name, before it was thoroughly | |
1529 | rewritten for Emacs 10.31. We leave this version here commented-out, | |
1530 | because the code is very complex and likely to have subtle bugs. If | |
1531 | bugs _are_ found, it might be of interest to look at the old code and | |
1532 | see what did it do in the relevant situation. | |
1533 | ||
30f50381 GM |
1534 | Don't remove this code: it's true that it will be accessible |
1535 | from the repository, but a few years from deletion, people will | |
1536 | forget it is there. */ | |
4887597a EZ |
1537 | |
1538 | /* Changed this DEFUN to a DEAFUN, so as not to confuse `make-docfile'. */ | |
1539 | DEAFUN ("expand-file-name", Fexpand_file_name, Sexpand_file_name, 1, 2, 0, | |
1540 | "Convert FILENAME to absolute, and canonicalize it.\n\ | |
1541 | Second arg DEFAULT is directory to start with if FILENAME is relative\n\ | |
c70a4df6 | 1542 | \(does not start with slash); if DEFAULT is nil or missing,\n\ |
4887597a EZ |
1543 | the current buffer's value of default-directory is used.\n\ |
1544 | Filenames containing `.' or `..' as components are simplified;\n\ | |
1545 | initial `~/' expands to your home directory.\n\ | |
1546 | See also the function `substitute-in-file-name'.") | |
1547 | (name, defalt) | |
1548 | Lisp_Object name, defalt; | |
1549 | { | |
1550 | unsigned char *nm; | |
1551 | ||
1552 | register unsigned char *newdir, *p, *o; | |
93f4cf88 | 1553 | ptrdiff_t tlen; |
4887597a EZ |
1554 | unsigned char *target; |
1555 | struct passwd *pw; | |
4887597a | 1556 | |
b7826503 | 1557 | CHECK_STRING (name); |
d5db4077 | 1558 | nm = SDATA (name); |
4887597a EZ |
1559 | |
1560 | /* If nm is absolute, flush ...// and detect /./ and /../. | |
1561 | If no /./ or /../ we can return right away. */ | |
7c2fb837 | 1562 | if (nm[0] == '/') |
4887597a | 1563 | { |
f75d7a91 | 1564 | bool lose = 0; |
4887597a | 1565 | p = nm; |
4887597a EZ |
1566 | while (*p) |
1567 | { | |
ce2fe65a | 1568 | if (p[0] == '/' && p[1] == '/') |
4887597a EZ |
1569 | nm = p + 1; |
1570 | if (p[0] == '/' && p[1] == '~') | |
1571 | nm = p + 1, lose = 1; | |
1572 | if (p[0] == '/' && p[1] == '.' | |
1573 | && (p[2] == '/' || p[2] == 0 | |
1574 | || (p[2] == '.' && (p[3] == '/' || p[3] == 0)))) | |
1575 | lose = 1; | |
4887597a EZ |
1576 | p++; |
1577 | } | |
1578 | if (!lose) | |
1579 | { | |
d5db4077 | 1580 | if (nm == SDATA (name)) |
4887597a EZ |
1581 | return name; |
1582 | return build_string (nm); | |
1583 | } | |
1584 | } | |
1585 | ||
e8d32c7e | 1586 | /* Now determine directory to start with and put it in NEWDIR. */ |
4887597a EZ |
1587 | |
1588 | newdir = 0; | |
1589 | ||
1590 | if (nm[0] == '~') /* prefix ~ */ | |
7c2fb837 | 1591 | if (nm[1] == '/' || nm[1] == 0)/* ~/filename */ |
4887597a EZ |
1592 | { |
1593 | if (!(newdir = (unsigned char *) egetenv ("HOME"))) | |
1594 | newdir = (unsigned char *) ""; | |
1595 | nm++; | |
4887597a EZ |
1596 | } |
1597 | else /* ~user/filename */ | |
1598 | { | |
e8d32c7e | 1599 | /* Get past ~ to user. */ |
4887597a | 1600 | unsigned char *user = nm + 1; |
e8d32c7e | 1601 | /* Find end of name. */ |
8966b757 | 1602 | unsigned char *ptr = (unsigned char *) strchr (user, '/'); |
93f4cf88 | 1603 | ptrdiff_t len = ptr ? ptr - user : strlen (user); |
e8d32c7e | 1604 | /* Copy the user name into temp storage. */ |
38182d90 | 1605 | o = alloca (len + 1); |
72af86bd | 1606 | memcpy (o, user, len); |
4887597a EZ |
1607 | o[len] = 0; |
1608 | ||
e8d32c7e | 1609 | /* Look up the user name. */ |
4d7e6e51 | 1610 | block_input (); |
4887597a | 1611 | pw = (struct passwd *) getpwnam (o + 1); |
4d7e6e51 | 1612 | unblock_input (); |
4887597a EZ |
1613 | if (!pw) |
1614 | error ("\"%s\" isn't a registered user", o + 1); | |
1615 | ||
1616 | newdir = (unsigned char *) pw->pw_dir; | |
1617 | ||
1618 | /* Discard the user name from NM. */ | |
1619 | nm += len; | |
1620 | } | |
1621 | ||
7c2fb837 | 1622 | if (nm[0] != '/' && !newdir) |
4887597a EZ |
1623 | { |
1624 | if (NILP (defalt)) | |
1625 | defalt = current_buffer->directory; | |
b7826503 | 1626 | CHECK_STRING (defalt); |
d5db4077 | 1627 | newdir = SDATA (defalt); |
4887597a EZ |
1628 | } |
1629 | ||
e8d32c7e | 1630 | /* Now concatenate the directory and name to new space in the stack frame. */ |
4887597a EZ |
1631 | |
1632 | tlen = (newdir ? strlen (newdir) + 1 : 0) + strlen (nm) + 1; | |
38182d90 | 1633 | target = alloca (tlen); |
4887597a EZ |
1634 | *target = 0; |
1635 | ||
1636 | if (newdir) | |
1637 | { | |
4887597a EZ |
1638 | if (nm[0] == 0 || nm[0] == '/') |
1639 | strcpy (target, newdir); | |
1640 | else | |
4887597a EZ |
1641 | file_name_as_directory (target, newdir); |
1642 | } | |
1643 | ||
1644 | strcat (target, nm); | |
4887597a | 1645 | |
e8d32c7e | 1646 | /* Now canonicalize by removing /. and /foo/.. if they appear. */ |
4887597a EZ |
1647 | |
1648 | p = target; | |
1649 | o = target; | |
1650 | ||
1651 | while (*p) | |
1652 | { | |
4887597a EZ |
1653 | if (*p != '/') |
1654 | { | |
1655 | *o++ = *p++; | |
1656 | } | |
1657 | else if (!strncmp (p, "//", 2) | |
4887597a EZ |
1658 | ) |
1659 | { | |
1660 | o = target; | |
1661 | p++; | |
1662 | } | |
994a7262 RS |
1663 | else if (p[0] == '/' && p[1] == '.' |
1664 | && (p[2] == '/' || p[2] == 0)) | |
4887597a EZ |
1665 | p += 2; |
1666 | else if (!strncmp (p, "/..", 3) | |
1667 | /* `/../' is the "superroot" on certain file systems. */ | |
1668 | && o != target | |
1669 | && (p[3] == '/' || p[3] == 0)) | |
1670 | { | |
1671 | while (o != target && *--o != '/') | |
1672 | ; | |
4887597a EZ |
1673 | if (o == target && *o == '/') |
1674 | ++o; | |
1675 | p += 3; | |
1676 | } | |
1677 | else | |
1678 | { | |
1679 | *o++ = *p++; | |
1680 | } | |
4887597a EZ |
1681 | } |
1682 | ||
1683 | return make_string (target, o - target); | |
1684 | } | |
1685 | #endif | |
570d7624 | 1686 | \f |
c70a4df6 | 1687 | /* If /~ or // appears, discard everything through first slash. */ |
f75d7a91 | 1688 | static bool |
5976c3fe | 1689 | file_name_absolute_p (const char *filename) |
c70a4df6 SM |
1690 | { |
1691 | return | |
1692 | (IS_DIRECTORY_SEP (*filename) || *filename == '~' | |
c70a4df6 SM |
1693 | #ifdef DOS_NT |
1694 | || (IS_DRIVE (*filename) && IS_DEVICE_SEP (filename[1]) | |
1695 | && IS_DIRECTORY_SEP (filename[2])) | |
1696 | #endif | |
1697 | ); | |
1698 | } | |
1699 | ||
5976c3fe PE |
1700 | static char * |
1701 | search_embedded_absfilename (char *nm, char *endp) | |
c70a4df6 | 1702 | { |
5976c3fe | 1703 | char *p, *s; |
c70a4df6 SM |
1704 | |
1705 | for (p = nm + 1; p < endp; p++) | |
1706 | { | |
ce2fe65a | 1707 | if (IS_DIRECTORY_SEP (p[-1]) |
c70a4df6 | 1708 | && file_name_absolute_p (p) |
5e617bc2 | 1709 | #if defined (WINDOWSNT) || defined (CYGWIN) |
c70a4df6 SM |
1710 | /* // at start of file name is meaningful in Apollo, |
1711 | WindowsNT and Cygwin systems. */ | |
f34574c6 | 1712 | && !(IS_DIRECTORY_SEP (p[0]) && p - 1 == nm) |
e39a993c | 1713 | #endif /* not (WINDOWSNT || CYGWIN) */ |
ce2fe65a | 1714 | ) |
c70a4df6 | 1715 | { |
ce2fe65a | 1716 | for (s = p; *s && !IS_DIRECTORY_SEP (*s); s++); |
e8d32c7e | 1717 | if (p[0] == '~' && s > p + 1) /* We've got "/~something/". */ |
c70a4df6 | 1718 | { |
5976c3fe | 1719 | char *o = alloca (s - p + 1); |
c70a4df6 | 1720 | struct passwd *pw; |
72af86bd | 1721 | memcpy (o, p, s - p); |
c70a4df6 SM |
1722 | o [s - p] = 0; |
1723 | ||
1724 | /* If we have ~user and `user' exists, discard | |
1725 | everything up to ~. But if `user' does not exist, leave | |
1726 | ~user alone, it might be a literal file name. */ | |
4d7e6e51 | 1727 | block_input (); |
67c08d6c | 1728 | pw = getpwnam (o + 1); |
4d7e6e51 | 1729 | unblock_input (); |
67c08d6c | 1730 | if (pw) |
c70a4df6 | 1731 | return p; |
c70a4df6 SM |
1732 | } |
1733 | else | |
1734 | return p; | |
1735 | } | |
1736 | } | |
1737 | return NULL; | |
1738 | } | |
1739 | ||
a7ca3326 | 1740 | DEFUN ("substitute-in-file-name", Fsubstitute_in_file_name, |
8c1a1077 PJ |
1741 | Ssubstitute_in_file_name, 1, 1, 0, |
1742 | doc: /* Substitute environment variables referred to in FILENAME. | |
1743 | `$FOO' where FOO is an environment variable name means to substitute | |
1744 | the value of that variable. The variable name should be terminated | |
1745 | with a character not a letter, digit or underscore; otherwise, enclose | |
1746 | the entire variable name in braces. | |
c68845e0 GM |
1747 | |
1748 | If `/~' appears, all of FILENAME through that `/' is discarded. | |
1749 | If `//' appears, everything up to and including the first of | |
1750 | those `/' is discarded. */) | |
5842a27b | 1751 | (Lisp_Object filename) |
570d7624 | 1752 | { |
ee041f2d SM |
1753 | char *nm, *p, *x, *endp; |
1754 | bool substituted = false; | |
fce31d69 | 1755 | bool multibyte; |
5976c3fe | 1756 | char *xnm; |
8ce069f5 | 1757 | Lisp_Object handler; |
570d7624 | 1758 | |
b7826503 | 1759 | CHECK_STRING (filename); |
570d7624 | 1760 | |
58aec0d6 JR |
1761 | multibyte = STRING_MULTIBYTE (filename); |
1762 | ||
8ce069f5 RS |
1763 | /* If the file name has special constructs in it, |
1764 | call the corresponding file handler. */ | |
3b7f6e60 | 1765 | handler = Ffind_file_name_handler (filename, Qsubstitute_in_file_name); |
8ce069f5 | 1766 | if (!NILP (handler)) |
2375c96a CY |
1767 | { |
1768 | Lisp_Object handled_name = call2 (handler, Qsubstitute_in_file_name, | |
1769 | filename); | |
1770 | if (STRINGP (handled_name)) | |
1771 | return handled_name; | |
1772 | error ("Invalid handler in `file-name-handler-alist'"); | |
1773 | } | |
8ce069f5 | 1774 | |
58aec0d6 JR |
1775 | /* Always work on a copy of the string, in case GC happens during |
1776 | decode of environment variables, causing the original Lisp_String | |
1777 | data to be relocated. */ | |
5b71542d | 1778 | nm = xlispstrdupa (filename); |
0f3f018c | 1779 | |
58aec0d6 | 1780 | #ifdef DOS_NT |
1fd201bb | 1781 | dostounix_filename (nm); |
e7ac588e | 1782 | substituted = (memcmp (nm, SDATA (filename), SBYTES (filename)) != 0); |
a5a1cc06 | 1783 | #endif |
d5db4077 | 1784 | endp = nm + SBYTES (filename); |
570d7624 | 1785 | |
82330e7f | 1786 | /* If /~ or // appears, discard everything through first slash. */ |
c70a4df6 SM |
1787 | p = search_embedded_absfilename (nm, endp); |
1788 | if (p) | |
1789 | /* Start over with the new string, so we check the file-name-handler | |
1790 | again. Important with filenames like "/home/foo//:/hello///there" | |
ee7683eb | 1791 | which would substitute to "/:/hello///there" rather than "/there". */ |
c70a4df6 | 1792 | return Fsubstitute_in_file_name |
58aec0d6 | 1793 | (make_specified_string (p, -1, endp - p, multibyte)); |
570d7624 | 1794 | |
ee041f2d | 1795 | /* See if any variables are substituted into the string. */ |
570d7624 | 1796 | |
ee041f2d SM |
1797 | if (!NILP (Ffboundp (Qsubstitute_env_in_file_name))) |
1798 | { | |
1799 | Lisp_Object name | |
1800 | = (!substituted ? filename | |
1801 | : make_specified_string (nm, -1, endp - nm, multibyte)); | |
1802 | Lisp_Object tmp = call1 (Qsubstitute_env_in_file_name, name); | |
1803 | CHECK_STRING (tmp); | |
1804 | if (!EQ (tmp, name)) | |
1805 | substituted = true; | |
1806 | filename = tmp; | |
1807 | } | |
570d7624 JB |
1808 | |
1809 | if (!substituted) | |
e7ac588e EZ |
1810 | { |
1811 | #ifdef WINDOWSNT | |
1812 | if (!NILP (Vw32_downcase_file_names)) | |
1813 | filename = Fdowncase (filename); | |
1814 | #endif | |
1815 | return filename; | |
1816 | } | |
570d7624 | 1817 | |
ee041f2d SM |
1818 | xnm = SSDATA (filename); |
1819 | x = xnm + SBYTES (filename); | |
3d798ba7 | 1820 | |
82330e7f | 1821 | /* If /~ or // appears, discard everything through first slash. */ |
ce2fe65a | 1822 | while ((p = search_embedded_absfilename (xnm, x)) != NULL) |
c70a4df6 SM |
1823 | /* This time we do not start over because we've already expanded envvars |
1824 | and replaced $$ with $. Maybe we should start over as well, but we'd | |
1825 | need to quote some $ to $$ first. */ | |
1826 | xnm = p; | |
570d7624 | 1827 | |
e7ac588e EZ |
1828 | #ifdef WINDOWSNT |
1829 | if (!NILP (Vw32_downcase_file_names)) | |
1830 | { | |
1831 | Lisp_Object xname = make_specified_string (xnm, -1, x - xnm, multibyte); | |
1832 | ||
1833 | xname = Fdowncase (xname); | |
1834 | return xname; | |
1835 | } | |
1836 | else | |
1837 | #endif | |
ee041f2d SM |
1838 | return (xnm == SSDATA (filename) |
1839 | ? filename | |
1840 | : make_specified_string (xnm, -1, x - xnm, multibyte)); | |
570d7624 JB |
1841 | } |
1842 | \f | |
067ffa38 | 1843 | /* A slightly faster and more convenient way to get |
298b760e | 1844 | (directory-file-name (expand-file-name FOO)). */ |
067ffa38 | 1845 | |
570d7624 | 1846 | Lisp_Object |
971de7fb | 1847 | expand_and_dir_to_file (Lisp_Object filename, Lisp_Object defdir) |
570d7624 | 1848 | { |
199607e4 | 1849 | register Lisp_Object absname; |
570d7624 | 1850 | |
199607e4 | 1851 | absname = Fexpand_file_name (filename, defdir); |
7c2fb837 | 1852 | |
199607e4 | 1853 | /* Remove final slash, if any (unless this is the root dir). |
570d7624 | 1854 | stat behaves differently depending! */ |
d5db4077 KR |
1855 | if (SCHARS (absname) > 1 |
1856 | && IS_DIRECTORY_SEP (SREF (absname, SBYTES (absname) - 1)) | |
e8d32c7e | 1857 | && !IS_DEVICE_SEP (SREF (absname, SBYTES (absname) - 2))) |
ddc61f46 | 1858 | /* We cannot take shortcuts; they might be wrong for magic file names. */ |
199607e4 | 1859 | absname = Fdirectory_file_name (absname); |
199607e4 | 1860 | return absname; |
570d7624 JB |
1861 | } |
1862 | \f | |
3ed15d97 | 1863 | /* Signal an error if the file ABSNAME already exists. |
a560b856 | 1864 | If KNOWN_TO_EXIST, the file is known to exist. |
3ed15d97 RS |
1865 | QUERYSTRING is a name for the action that is being considered |
1866 | to alter the file. | |
a560b856 PE |
1867 | If INTERACTIVE, ask the user whether to proceed, |
1868 | and bypass the error if the user says to go ahead. | |
f75d7a91 | 1869 | If QUICK, ask for y or n, not yes or no. */ |
3ed15d97 | 1870 | |
f14b7e14 | 1871 | static void |
a560b856 PE |
1872 | barf_or_query_if_file_exists (Lisp_Object absname, bool known_to_exist, |
1873 | const char *querystring, bool interactive, | |
f75d7a91 | 1874 | bool quick) |
570d7624 | 1875 | { |
f75d7a91 | 1876 | Lisp_Object tem, encoded_filename; |
4018b5ef | 1877 | struct stat statbuf; |
570d7624 JB |
1878 | struct gcpro gcpro1; |
1879 | ||
643c73b9 RS |
1880 | encoded_filename = ENCODE_FILE (absname); |
1881 | ||
a560b856 | 1882 | if (! known_to_exist && lstat (SSDATA (encoded_filename), &statbuf) == 0) |
570d7624 | 1883 | { |
6e9b2be9 | 1884 | if (S_ISDIR (statbuf.st_mode)) |
c4f2d8d4 | 1885 | xsignal2 (Qfile_error, |
ad637907 | 1886 | build_string ("File is a directory"), absname); |
a560b856 PE |
1887 | known_to_exist = true; |
1888 | } | |
c4f2d8d4 | 1889 | |
a560b856 PE |
1890 | if (known_to_exist) |
1891 | { | |
570d7624 | 1892 | if (! interactive) |
24b1ddad KS |
1893 | xsignal2 (Qfile_already_exists, |
1894 | build_string ("File already exists"), absname); | |
570d7624 | 1895 | GCPRO1 (absname); |
67e8e2b8 RS |
1896 | tem = format2 ("File %s already exists; %s anyway? ", |
1897 | absname, build_string (querystring)); | |
b8b29dc9 | 1898 | if (quick) |
5616cc54 | 1899 | tem = call1 (intern ("y-or-n-p"), tem); |
b8b29dc9 RS |
1900 | else |
1901 | tem = do_yes_or_no_p (tem); | |
570d7624 | 1902 | UNGCPRO; |
265a9e55 | 1903 | if (NILP (tem)) |
24b1ddad KS |
1904 | xsignal2 (Qfile_already_exists, |
1905 | build_string ("File already exists"), absname); | |
3ed15d97 | 1906 | } |
570d7624 JB |
1907 | } |
1908 | ||
574c05e2 | 1909 | DEFUN ("copy-file", Fcopy_file, Scopy_file, 2, 6, |
7c0f6118 | 1910 | "fCopy file: \nGCopy %s to file: \np\nP", |
8c1a1077 PJ |
1911 | doc: /* Copy FILE to NEWNAME. Both args must be strings. |
1912 | If NEWNAME names a directory, copy FILE there. | |
795c20df CY |
1913 | |
1914 | This function always sets the file modes of the output file to match | |
1915 | the input file. | |
1916 | ||
1917 | The optional third argument OK-IF-ALREADY-EXISTS specifies what to do | |
1918 | if file NEWNAME already exists. If OK-IF-ALREADY-EXISTS is nil, we | |
1919 | signal a `file-already-exists' error without overwriting. If | |
1920 | OK-IF-ALREADY-EXISTS is a number, we request confirmation from the user | |
1921 | about overwriting; this is what happens in interactive use with M-x. | |
1922 | Any other value for OK-IF-ALREADY-EXISTS means to overwrite the | |
1923 | existing file. | |
c50f15d0 | 1924 | |
7f08b80e | 1925 | Fourth arg KEEP-TIME non-nil means give the output file the same |
8c1a1077 | 1926 | last-modified time as the old one. (This works on only some systems.) |
c50f15d0 | 1927 | |
7fce7dfe EZ |
1928 | A prefix arg makes KEEP-TIME non-nil. |
1929 | ||
586702ce | 1930 | If PRESERVE-UID-GID is non-nil, we try to transfer the |
574c05e2 KK |
1931 | uid and gid of FILE to NEWNAME. |
1932 | ||
a560b856 PE |
1933 | If PRESERVE-PERMISSIONS is non-nil, copy permissions of FILE to NEWNAME; |
1934 | this includes the file modes, along with ACL entries and SELinux | |
1935 | context if present. Otherwise, if NEWNAME is created its file | |
1936 | permission bits are those of FILE, masked by the default file | |
1937 | permissions. */) | |
1938 | (Lisp_Object file, Lisp_Object newname, Lisp_Object ok_if_already_exists, | |
1939 | Lisp_Object keep_time, Lisp_Object preserve_uid_gid, | |
1940 | Lisp_Object preserve_permissions) | |
570d7624 | 1941 | { |
32f4334d | 1942 | Lisp_Object handler; |
b1d1b865 | 1943 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; |
d311d28c | 1944 | ptrdiff_t count = SPECPDL_INDEX (); |
b1d1b865 | 1945 | Lisp_Object encoded_file, encoded_newname; |
574c05e2 KK |
1946 | #if HAVE_LIBSELINUX |
1947 | security_context_t con; | |
f75d7a91 | 1948 | int conlength = 0; |
574c05e2 | 1949 | #endif |
ffdc270a | 1950 | #ifdef WINDOWSNT |
ec4440cf | 1951 | int result; |
af025ae8 | 1952 | #else |
2db9da01 JB |
1953 | bool already_exists = false; |
1954 | mode_t new_mask; | |
af025ae8 EZ |
1955 | int ifd, ofd; |
1956 | int n; | |
1957 | char buf[16 * 1024]; | |
1958 | struct stat st; | |
7c3d167f | 1959 | #endif |
570d7624 | 1960 | |
b1d1b865 RS |
1961 | encoded_file = encoded_newname = Qnil; |
1962 | GCPRO4 (file, newname, encoded_file, encoded_newname); | |
b7826503 PJ |
1963 | CHECK_STRING (file); |
1964 | CHECK_STRING (newname); | |
b1d1b865 | 1965 | |
a9d14e54 | 1966 | if (!NILP (Ffile_directory_p (newname))) |
6b61353c | 1967 | newname = Fexpand_file_name (Ffile_name_nondirectory (file), newname); |
a9d14e54 GM |
1968 | else |
1969 | newname = Fexpand_file_name (newname, Qnil); | |
1970 | ||
3b7f6e60 | 1971 | file = Fexpand_file_name (file, Qnil); |
32f4334d | 1972 | |
0bf2eed2 | 1973 | /* If the input file name has special constructs in it, |
32f4334d | 1974 | call the corresponding file handler. */ |
3b7f6e60 | 1975 | handler = Ffind_file_name_handler (file, Qcopy_file); |
0bf2eed2 | 1976 | /* Likewise for output file name. */ |
51cf6d37 | 1977 | if (NILP (handler)) |
49307295 | 1978 | handler = Ffind_file_name_handler (newname, Qcopy_file); |
32f4334d | 1979 | if (!NILP (handler)) |
574c05e2 KK |
1980 | RETURN_UNGCPRO (call7 (handler, Qcopy_file, file, newname, |
1981 | ok_if_already_exists, keep_time, preserve_uid_gid, | |
a560b856 | 1982 | preserve_permissions)); |
32f4334d | 1983 | |
b1d1b865 RS |
1984 | encoded_file = ENCODE_FILE (file); |
1985 | encoded_newname = ENCODE_FILE (newname); | |
1986 | ||
a560b856 | 1987 | #ifdef WINDOWSNT |
265a9e55 | 1988 | if (NILP (ok_if_already_exists) |
93c30b5f | 1989 | || INTEGERP (ok_if_already_exists)) |
a560b856 PE |
1990 | barf_or_query_if_file_exists (newname, false, "copy to it", |
1991 | INTEGERP (ok_if_already_exists), false); | |
570d7624 | 1992 | |
ec4440cf EZ |
1993 | result = w32_copy_file (SSDATA (encoded_file), SSDATA (encoded_newname), |
1994 | !NILP (keep_time), !NILP (preserve_uid_gid), | |
a560b856 | 1995 | !NILP (preserve_permissions)); |
ec4440cf | 1996 | switch (result) |
66447e07 | 1997 | { |
ec4440cf EZ |
1998 | case -1: |
1999 | report_file_error ("Copying file", list2 (file, newname)); | |
2000 | case -2: | |
2001 | report_file_error ("Copying permissions from", file); | |
2002 | case -3: | |
2003 | xsignal2 (Qfile_date_error, | |
2004 | build_string ("Resetting file times"), newname); | |
2005 | case -4: | |
2006 | report_file_error ("Copying permissions to", newname); | |
66447e07 | 2007 | } |
e8691c59 | 2008 | #else /* not WINDOWSNT */ |
13336908 | 2009 | immediate_quit = 1; |
42a5b22f | 2010 | ifd = emacs_open (SSDATA (encoded_file), O_RDONLY, 0); |
13336908 RS |
2011 | immediate_quit = 0; |
2012 | ||
570d7624 | 2013 | if (ifd < 0) |
a9757f6a | 2014 | report_file_error ("Opening input file", file); |
570d7624 | 2015 | |
27e498e6 | 2016 | record_unwind_protect_int (close_file_unwind, ifd); |
b5148e85 | 2017 | |
d20704ef | 2018 | if (fstat (ifd, &st) != 0) |
a9757f6a | 2019 | report_file_error ("Input file status", file); |
f73b0ada | 2020 | |
a560b856 | 2021 | if (!NILP (preserve_permissions)) |
574c05e2 | 2022 | { |
7c3d167f RF |
2023 | #if HAVE_LIBSELINUX |
2024 | if (is_selinux_enabled ()) | |
2025 | { | |
2026 | conlength = fgetfilecon (ifd, &con); | |
2027 | if (conlength == -1) | |
a9757f6a | 2028 | report_file_error ("Doing fgetfilecon", file); |
7c3d167f RF |
2029 | } |
2030 | #endif | |
7c3d167f | 2031 | } |
574c05e2 | 2032 | |
d20704ef PE |
2033 | /* We can copy only regular files. */ |
2034 | if (!S_ISREG (st.st_mode)) | |
a9757f6a | 2035 | report_file_errno ("Non-regular file", file, |
a773ed9a | 2036 | S_ISDIR (st.st_mode) ? EISDIR : EINVAL); |
f73b0ada | 2037 | |
a773ed9a | 2038 | #ifndef MSDOS |
a560b856 | 2039 | new_mask = st.st_mode & (!NILP (preserve_uid_gid) ? 0700 : 0777); |
a773ed9a | 2040 | #else |
a560b856 | 2041 | new_mask = S_IREAD | S_IWRITE; |
a773ed9a | 2042 | #endif |
a560b856 PE |
2043 | |
2044 | ofd = emacs_open (SSDATA (encoded_newname), O_WRONLY | O_CREAT | O_EXCL, | |
2045 | new_mask); | |
2046 | if (ofd < 0 && errno == EEXIST) | |
2047 | { | |
2048 | if (NILP (ok_if_already_exists) || INTEGERP (ok_if_already_exists)) | |
2049 | barf_or_query_if_file_exists (newname, true, "copy to it", | |
2050 | INTEGERP (ok_if_already_exists), false); | |
2051 | already_exists = true; | |
2052 | ofd = emacs_open (SSDATA (encoded_newname), O_WRONLY, 0); | |
2053 | } | |
570d7624 | 2054 | if (ofd < 0) |
a9757f6a | 2055 | report_file_error ("Opening output file", newname); |
b5148e85 | 2056 | |
27e498e6 | 2057 | record_unwind_protect_int (close_file_unwind, ofd); |
570d7624 | 2058 | |
a560b856 PE |
2059 | if (already_exists) |
2060 | { | |
2061 | struct stat out_st; | |
2062 | if (fstat (ofd, &out_st) != 0) | |
2063 | report_file_error ("Output file status", newname); | |
2064 | if (st.st_dev == out_st.st_dev && st.st_ino == out_st.st_ino) | |
2065 | report_file_errno ("Input and output files are the same", | |
2066 | list2 (file, newname), 0); | |
2067 | if (ftruncate (ofd, 0) != 0) | |
2068 | report_file_error ("Truncating output file", newname); | |
2069 | } | |
2070 | ||
b5148e85 RS |
2071 | immediate_quit = 1; |
2072 | QUIT; | |
68c45bf0 | 2073 | while ((n = emacs_read (ifd, buf, sizeof buf)) > 0) |
4ebbdd67 | 2074 | if (emacs_write_sig (ofd, buf, n) != n) |
4e604a5d | 2075 | report_file_error ("Write error", newname); |
b5148e85 | 2076 | immediate_quit = 0; |
570d7624 | 2077 | |
b016179b | 2078 | #ifndef MSDOS |
ffdc270a | 2079 | /* Preserve the original file permissions, and if requested, also its |
b016179b | 2080 | owner and group. */ |
d20704ef | 2081 | { |
a560b856 PE |
2082 | mode_t preserved_permissions = st.st_mode & 07777; |
2083 | mode_t default_permissions = st.st_mode & 0777 & ~realmask; | |
d20704ef PE |
2084 | if (!NILP (preserve_uid_gid)) |
2085 | { | |
2086 | /* Attempt to change owner and group. If that doesn't work | |
2087 | attempt to change just the group, as that is sometimes allowed. | |
2088 | Adjust the mode mask to eliminate setuid or setgid bits | |
a560b856 PE |
2089 | or group permissions bits that are inappropriate if the |
2090 | owner or group are wrong. */ | |
d20704ef PE |
2091 | if (fchown (ofd, st.st_uid, st.st_gid) != 0) |
2092 | { | |
d20704ef | 2093 | if (fchown (ofd, -1, st.st_gid) == 0) |
a560b856 PE |
2094 | preserved_permissions &= ~04000; |
2095 | else | |
2096 | { | |
2097 | preserved_permissions &= ~06000; | |
2098 | ||
2099 | /* Copy the other bits to the group bits, since the | |
2100 | group is wrong. */ | |
2101 | preserved_permissions &= ~070; | |
2102 | preserved_permissions |= (preserved_permissions & 7) << 3; | |
2103 | default_permissions &= ~070; | |
2104 | default_permissions |= (default_permissions & 7) << 3; | |
2105 | } | |
d20704ef PE |
2106 | } |
2107 | } | |
ffdc270a | 2108 | |
a560b856 | 2109 | switch (!NILP (preserve_permissions) |
ffdc270a PE |
2110 | ? qcopy_acl (SSDATA (encoded_file), ifd, |
2111 | SSDATA (encoded_newname), ofd, | |
a560b856 PE |
2112 | preserved_permissions) |
2113 | : (already_exists | |
2114 | || (new_mask & ~realmask) == default_permissions) | |
2115 | ? 0 | |
2116 | : fchmod (ofd, default_permissions)) | |
ffdc270a | 2117 | { |
a9757f6a PE |
2118 | case -2: report_file_error ("Copying permissions from", file); |
2119 | case -1: report_file_error ("Copying permissions to", newname); | |
ffdc270a | 2120 | } |
d20704ef | 2121 | } |
b016179b | 2122 | #endif /* not MSDOS */ |
586702ce | 2123 | |
574c05e2 KK |
2124 | #if HAVE_LIBSELINUX |
2125 | if (conlength > 0) | |
2126 | { | |
24c51a09 | 2127 | /* Set the modified context back to the file. */ |
f75d7a91 | 2128 | bool fail = fsetfilecon (ofd, con) != 0; |
24c51a09 GM |
2129 | /* See http://debbugs.gnu.org/11245 for ENOTSUP. */ |
2130 | if (fail && errno != ENOTSUP) | |
a9757f6a | 2131 | report_file_error ("Doing fsetfilecon", newname); |
574c05e2 KK |
2132 | |
2133 | freecon (con); | |
2134 | } | |
2135 | #endif | |
2136 | ||
d20704ef | 2137 | if (!NILP (keep_time)) |
570d7624 | 2138 | { |
43aac990 PE |
2139 | struct timespec atime = get_stat_atime (&st); |
2140 | struct timespec mtime = get_stat_mtime (&st); | |
96c06863 | 2141 | if (set_file_times (ofd, SSDATA (encoded_newname), atime, mtime) != 0) |
d20704ef PE |
2142 | xsignal2 (Qfile_date_error, |
2143 | build_string ("Cannot set file date"), newname); | |
570d7624 JB |
2144 | } |
2145 | ||
d35af63c | 2146 | if (emacs_close (ofd) < 0) |
4e604a5d | 2147 | report_file_error ("Write error", newname); |
d35af63c | 2148 | |
68c45bf0 | 2149 | emacs_close (ifd); |
b016179b | 2150 | |
ed68db4d | 2151 | #ifdef MSDOS |
d20704ef PE |
2152 | /* In DJGPP v2.0 and later, fstat usually returns true file mode bits, |
2153 | and if it can't, it tells so. Otherwise, under MSDOS we usually | |
2154 | get only the READ bit, which will make the copied file read-only, | |
2155 | so it's better not to chmod at all. */ | |
2156 | if ((_djstat_flags & _STFAIL_WRITEBIT) == 0) | |
2157 | chmod (SDATA (encoded_newname), st.st_mode & 07777); | |
ed68db4d | 2158 | #endif /* MSDOS */ |
b016179b | 2159 | #endif /* not WINDOWSNT */ |
5acac34e | 2160 | |
b5148e85 RS |
2161 | /* Discard the unwind protects. */ |
2162 | specpdl_ptr = specpdl + count; | |
2163 | ||
570d7624 JB |
2164 | UNGCPRO; |
2165 | return Qnil; | |
2166 | } | |
385b6cc7 | 2167 | \f |
9bbe01fb | 2168 | DEFUN ("make-directory-internal", Fmake_directory_internal, |
353cfc19 | 2169 | Smake_directory_internal, 1, 1, 0, |
8c1a1077 | 2170 | doc: /* Create a new directory named DIRECTORY. */) |
5842a27b | 2171 | (Lisp_Object directory) |
570d7624 | 2172 | { |
5976c3fe | 2173 | const char *dir; |
32f4334d | 2174 | Lisp_Object handler; |
b1d1b865 | 2175 | Lisp_Object encoded_dir; |
570d7624 | 2176 | |
b7826503 | 2177 | CHECK_STRING (directory); |
3b7f6e60 | 2178 | directory = Fexpand_file_name (directory, Qnil); |
32f4334d | 2179 | |
3b7f6e60 | 2180 | handler = Ffind_file_name_handler (directory, Qmake_directory_internal); |
32f4334d | 2181 | if (!NILP (handler)) |
3b7f6e60 | 2182 | return call2 (handler, Qmake_directory_internal, directory); |
9bbe01fb | 2183 | |
b1d1b865 RS |
2184 | encoded_dir = ENCODE_FILE (directory); |
2185 | ||
5976c3fe | 2186 | dir = SSDATA (encoded_dir); |
570d7624 | 2187 | |
5e570b75 RS |
2188 | #ifdef WINDOWSNT |
2189 | if (mkdir (dir) != 0) | |
2190 | #else | |
09450bae | 2191 | if (mkdir (dir, 0777 & ~auto_saving_dir_umask) != 0) |
5e570b75 | 2192 | #endif |
a9757f6a | 2193 | report_file_error ("Creating directory", directory); |
570d7624 | 2194 | |
32f4334d | 2195 | return Qnil; |
570d7624 JB |
2196 | } |
2197 | ||
9d8f3bd9 MA |
2198 | DEFUN ("delete-directory-internal", Fdelete_directory_internal, |
2199 | Sdelete_directory_internal, 1, 1, 0, | |
efdc16c9 | 2200 | doc: /* Delete the directory named DIRECTORY. Does not follow symlinks. */) |
5842a27b | 2201 | (Lisp_Object directory) |
570d7624 | 2202 | { |
5976c3fe | 2203 | const char *dir; |
b1d1b865 | 2204 | Lisp_Object encoded_dir; |
570d7624 | 2205 | |
b7826503 | 2206 | CHECK_STRING (directory); |
3b7f6e60 | 2207 | directory = Fdirectory_file_name (Fexpand_file_name (directory, Qnil)); |
b1d1b865 | 2208 | encoded_dir = ENCODE_FILE (directory); |
5976c3fe | 2209 | dir = SSDATA (encoded_dir); |
b1d1b865 | 2210 | |
570d7624 | 2211 | if (rmdir (dir) != 0) |
a9757f6a | 2212 | report_file_error ("Removing directory", directory); |
570d7624 JB |
2213 | |
2214 | return Qnil; | |
2215 | } | |
2216 | ||
2e2bbddb | 2217 | DEFUN ("delete-file", Fdelete_file, Sdelete_file, 1, 2, |
f1a5d776 CY |
2218 | "(list (read-file-name \ |
2219 | (if (and delete-by-moving-to-trash (null current-prefix-arg)) \ | |
2220 | \"Move file to trash: \" \"Delete file: \") \ | |
2221 | nil default-directory (confirm-nonexistent-file-or-buffer)) \ | |
2222 | (null current-prefix-arg))", | |
efdc16c9 | 2223 | doc: /* Delete file named FILENAME. If it is a symlink, remove the symlink. |
53967e09 | 2224 | If file has multiple names, it continues to exist with the other names. |
f1a5d776 CY |
2225 | TRASH non-nil means to trash the file instead of deleting, provided |
2226 | `delete-by-moving-to-trash' is non-nil. | |
53967e09 | 2227 | |
f1a5d776 CY |
2228 | When called interactively, TRASH is t if no prefix argument is given. |
2229 | With a prefix argument, TRASH is nil. */) | |
5842a27b | 2230 | (Lisp_Object filename, Lisp_Object trash) |
570d7624 | 2231 | { |
32f4334d | 2232 | Lisp_Object handler; |
b1d1b865 | 2233 | Lisp_Object encoded_file; |
efdc16c9 | 2234 | struct gcpro gcpro1; |
b1d1b865 | 2235 | |
efdc16c9 | 2236 | GCPRO1 (filename); |
b4bd27c5 RS |
2237 | if (!NILP (Ffile_directory_p (filename)) |
2238 | && NILP (Ffile_symlink_p (filename))) | |
24b1ddad KS |
2239 | xsignal2 (Qfile_error, |
2240 | build_string ("Removing old name: is a directory"), | |
2241 | filename); | |
efdc16c9 | 2242 | UNGCPRO; |
570d7624 | 2243 | filename = Fexpand_file_name (filename, Qnil); |
32f4334d | 2244 | |
49307295 | 2245 | handler = Ffind_file_name_handler (filename, Qdelete_file); |
32f4334d | 2246 | if (!NILP (handler)) |
f5783df3 | 2247 | return call3 (handler, Qdelete_file, filename, trash); |
32f4334d | 2248 | |
f1a5d776 | 2249 | if (delete_by_moving_to_trash && !NILP (trash)) |
6cf29fe8 JR |
2250 | return call1 (Qmove_file_to_trash, filename); |
2251 | ||
b1d1b865 RS |
2252 | encoded_file = ENCODE_FILE (filename); |
2253 | ||
ce2fe65a | 2254 | if (unlink (SSDATA (encoded_file)) < 0) |
a9757f6a | 2255 | report_file_error ("Removing old name", filename); |
8a9b0da9 | 2256 | return Qnil; |
570d7624 JB |
2257 | } |
2258 | ||
385b6cc7 | 2259 | static Lisp_Object |
971de7fb | 2260 | internal_delete_file_1 (Lisp_Object ignore) |
385b6cc7 RS |
2261 | { |
2262 | return Qt; | |
2263 | } | |
2264 | ||
7d80ea23 | 2265 | /* Delete file FILENAME, returning true if successful. |
f1a5d776 | 2266 | This ignores `delete-by-moving-to-trash'. */ |
385b6cc7 | 2267 | |
7d80ea23 | 2268 | bool |
f1a5d776 | 2269 | internal_delete_file (Lisp_Object filename) |
385b6cc7 | 2270 | { |
b0728617 EZ |
2271 | Lisp_Object tem; |
2272 | ||
2273 | tem = internal_condition_case_2 (Fdelete_file, filename, Qnil, | |
2274 | Qt, internal_delete_file_1); | |
2275 | return NILP (tem); | |
385b6cc7 RS |
2276 | } |
2277 | \f | |
570d7624 | 2278 | DEFUN ("rename-file", Frename_file, Srename_file, 2, 3, |
7c0f6118 | 2279 | "fRename file: \nGRename %s to file: \np", |
a4e03fe5 | 2280 | doc: /* Rename FILE as NEWNAME. Both args must be strings. |
8c1a1077 PJ |
2281 | If file has names other than FILE, it continues to have those names. |
2282 | Signals a `file-already-exists' error if a file NEWNAME already exists | |
2283 | unless optional third argument OK-IF-ALREADY-EXISTS is non-nil. | |
2284 | A number as third arg means request confirmation if NEWNAME already exists. | |
2285 | This is what happens in interactive use with M-x. */) | |
5842a27b | 2286 | (Lisp_Object file, Lisp_Object newname, Lisp_Object ok_if_already_exists) |
570d7624 | 2287 | { |
32f4334d | 2288 | Lisp_Object handler; |
f72b5416 JD |
2289 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4, gcpro5; |
2290 | Lisp_Object encoded_file, encoded_newname, symlink_target; | |
570d7624 | 2291 | |
f72b5416 JD |
2292 | symlink_target = encoded_file = encoded_newname = Qnil; |
2293 | GCPRO5 (file, newname, encoded_file, encoded_newname, symlink_target); | |
b7826503 PJ |
2294 | CHECK_STRING (file); |
2295 | CHECK_STRING (newname); | |
3b7f6e60 | 2296 | file = Fexpand_file_name (file, Qnil); |
1ffc5c90 | 2297 | |
f83caf70 EZ |
2298 | if ((!NILP (Ffile_directory_p (newname))) |
2299 | #ifdef DOS_NT | |
2300 | /* If the file names are identical but for the case, | |
2301 | don't attempt to move directory to itself. */ | |
2302 | && (NILP (Fstring_equal (Fdowncase (file), Fdowncase (newname)))) | |
2303 | #endif | |
2304 | ) | |
8719abec | 2305 | { |
ce2fe65a AS |
2306 | Lisp_Object fname = (NILP (Ffile_directory_p (file)) |
2307 | ? file : Fdirectory_file_name (file)); | |
8719abec CY |
2308 | newname = Fexpand_file_name (Ffile_name_nondirectory (fname), newname); |
2309 | } | |
1ffc5c90 RS |
2310 | else |
2311 | newname = Fexpand_file_name (newname, Qnil); | |
32f4334d RS |
2312 | |
2313 | /* If the file name has special constructs in it, | |
2314 | call the corresponding file handler. */ | |
3b7f6e60 | 2315 | handler = Ffind_file_name_handler (file, Qrename_file); |
51cf6d37 | 2316 | if (NILP (handler)) |
49307295 | 2317 | handler = Ffind_file_name_handler (newname, Qrename_file); |
32f4334d | 2318 | if (!NILP (handler)) |
36712b0a | 2319 | RETURN_UNGCPRO (call4 (handler, Qrename_file, |
3b7f6e60 | 2320 | file, newname, ok_if_already_exists)); |
32f4334d | 2321 | |
b1d1b865 RS |
2322 | encoded_file = ENCODE_FILE (file); |
2323 | encoded_newname = ENCODE_FILE (newname); | |
2324 | ||
bc77278f EZ |
2325 | #ifdef DOS_NT |
2326 | /* If the file names are identical but for the case, don't ask for | |
2327 | confirmation: they simply want to change the letter-case of the | |
2328 | file name. */ | |
2329 | if (NILP (Fstring_equal (Fdowncase (file), Fdowncase (newname)))) | |
2330 | #endif | |
265a9e55 | 2331 | if (NILP (ok_if_already_exists) |
93c30b5f | 2332 | || INTEGERP (ok_if_already_exists)) |
a560b856 PE |
2333 | barf_or_query_if_file_exists (newname, false, "rename to it", |
2334 | INTEGERP (ok_if_already_exists), false); | |
ce2fe65a | 2335 | if (rename (SSDATA (encoded_file), SSDATA (encoded_newname)) < 0) |
570d7624 | 2336 | { |
b648c163 PE |
2337 | int rename_errno = errno; |
2338 | if (rename_errno == EXDEV) | |
570d7624 | 2339 | { |
d311d28c | 2340 | ptrdiff_t count; |
f72b5416 | 2341 | symlink_target = Ffile_symlink_p (file); |
440c7d00 JD |
2342 | if (! NILP (symlink_target)) |
2343 | Fmake_symbolic_link (symlink_target, newname, | |
f59abab9 | 2344 | NILP (ok_if_already_exists) ? Qnil : Qt); |
ae0d7250 | 2345 | else if (!NILP (Ffile_directory_p (file))) |
8719abec CY |
2346 | call4 (Qcopy_directory, file, newname, Qt, Qnil); |
2347 | else | |
2348 | /* We have already prompted if it was an integer, so don't | |
2349 | have copy-file prompt again. */ | |
586702ce | 2350 | Fcopy_file (file, newname, |
586702ce | 2351 | NILP (ok_if_already_exists) ? Qnil : Qt, |
574c05e2 | 2352 | Qt, Qt, Qt); |
d550c425 | 2353 | |
6bddfc97 | 2354 | count = SPECPDL_INDEX (); |
d2b66acf | 2355 | specbind (Qdelete_by_moving_to_trash, Qnil); |
8fab2362 | 2356 | |
ae0d7250 | 2357 | if (!NILP (Ffile_directory_p (file)) && NILP (symlink_target)) |
8719abec CY |
2358 | call2 (Qdelete_directory, file, Qt); |
2359 | else | |
f1a5d776 | 2360 | Fdelete_file (file, Qnil); |
6bddfc97 | 2361 | unbind_to (count, Qnil); |
570d7624 JB |
2362 | } |
2363 | else | |
b648c163 | 2364 | report_file_errno ("Renaming", list2 (file, newname), rename_errno); |
570d7624 JB |
2365 | } |
2366 | UNGCPRO; | |
2367 | return Qnil; | |
2368 | } | |
2369 | ||
2370 | DEFUN ("add-name-to-file", Fadd_name_to_file, Sadd_name_to_file, 2, 3, | |
7c0f6118 | 2371 | "fAdd name to file: \nGName to add to %s: \np", |
a4e03fe5 | 2372 | doc: /* Give FILE additional name NEWNAME. Both args must be strings. |
8c1a1077 PJ |
2373 | Signals a `file-already-exists' error if a file NEWNAME already exists |
2374 | unless optional third argument OK-IF-ALREADY-EXISTS is non-nil. | |
2375 | A number as third arg means request confirmation if NEWNAME already exists. | |
2376 | This is what happens in interactive use with M-x. */) | |
5842a27b | 2377 | (Lisp_Object file, Lisp_Object newname, Lisp_Object ok_if_already_exists) |
570d7624 | 2378 | { |
32f4334d | 2379 | Lisp_Object handler; |
b1d1b865 RS |
2380 | Lisp_Object encoded_file, encoded_newname; |
2381 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; | |
570d7624 | 2382 | |
b1d1b865 RS |
2383 | GCPRO4 (file, newname, encoded_file, encoded_newname); |
2384 | encoded_file = encoded_newname = Qnil; | |
b7826503 PJ |
2385 | CHECK_STRING (file); |
2386 | CHECK_STRING (newname); | |
3b7f6e60 | 2387 | file = Fexpand_file_name (file, Qnil); |
1ffc5c90 RS |
2388 | |
2389 | if (!NILP (Ffile_directory_p (newname))) | |
2390 | newname = Fexpand_file_name (Ffile_name_nondirectory (file), newname); | |
2391 | else | |
2392 | newname = Fexpand_file_name (newname, Qnil); | |
32f4334d RS |
2393 | |
2394 | /* If the file name has special constructs in it, | |
2395 | call the corresponding file handler. */ | |
3b7f6e60 | 2396 | handler = Ffind_file_name_handler (file, Qadd_name_to_file); |
32f4334d | 2397 | if (!NILP (handler)) |
3b7f6e60 | 2398 | RETURN_UNGCPRO (call4 (handler, Qadd_name_to_file, file, |
36712b0a | 2399 | newname, ok_if_already_exists)); |
32f4334d | 2400 | |
adc6741c RS |
2401 | /* If the new name has special constructs in it, |
2402 | call the corresponding file handler. */ | |
2403 | handler = Ffind_file_name_handler (newname, Qadd_name_to_file); | |
2404 | if (!NILP (handler)) | |
3b7f6e60 | 2405 | RETURN_UNGCPRO (call4 (handler, Qadd_name_to_file, file, |
adc6741c RS |
2406 | newname, ok_if_already_exists)); |
2407 | ||
b1d1b865 RS |
2408 | encoded_file = ENCODE_FILE (file); |
2409 | encoded_newname = ENCODE_FILE (newname); | |
2410 | ||
265a9e55 | 2411 | if (NILP (ok_if_already_exists) |
93c30b5f | 2412 | || INTEGERP (ok_if_already_exists)) |
a560b856 PE |
2413 | barf_or_query_if_file_exists (newname, false, "make it a new name", |
2414 | INTEGERP (ok_if_already_exists), false); | |
5e570b75 | 2415 | |
42a5b22f | 2416 | unlink (SSDATA (newname)); |
ce2fe65a | 2417 | if (link (SSDATA (encoded_file), SSDATA (encoded_newname)) < 0) |
b648c163 PE |
2418 | { |
2419 | int link_errno = errno; | |
2420 | report_file_errno ("Adding new name", list2 (file, newname), link_errno); | |
2421 | } | |
570d7624 JB |
2422 | |
2423 | UNGCPRO; | |
2424 | return Qnil; | |
2425 | } | |
2426 | ||
570d7624 | 2427 | DEFUN ("make-symbolic-link", Fmake_symbolic_link, Smake_symbolic_link, 2, 3, |
7c0f6118 | 2428 | "FMake symbolic link to file: \nGMake symbolic link to file %s: \np", |
68780e2a RS |
2429 | doc: /* Make a symbolic link to FILENAME, named LINKNAME. |
2430 | Both args must be strings. | |
8c1a1077 PJ |
2431 | Signals a `file-already-exists' error if a file LINKNAME already exists |
2432 | unless optional third argument OK-IF-ALREADY-EXISTS is non-nil. | |
2433 | A number as third arg means request confirmation if LINKNAME already exists. | |
2434 | This happens for interactive use with M-x. */) | |
5842a27b | 2435 | (Lisp_Object filename, Lisp_Object linkname, Lisp_Object ok_if_already_exists) |
570d7624 | 2436 | { |
32f4334d | 2437 | Lisp_Object handler; |
b1d1b865 RS |
2438 | Lisp_Object encoded_filename, encoded_linkname; |
2439 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; | |
570d7624 | 2440 | |
b1d1b865 RS |
2441 | GCPRO4 (filename, linkname, encoded_filename, encoded_linkname); |
2442 | encoded_filename = encoded_linkname = Qnil; | |
b7826503 PJ |
2443 | CHECK_STRING (filename); |
2444 | CHECK_STRING (linkname); | |
d9bc1c99 RS |
2445 | /* If the link target has a ~, we must expand it to get |
2446 | a truly valid file name. Otherwise, do not expand; | |
2447 | we want to permit links to relative file names. */ | |
d5db4077 | 2448 | if (SREF (filename, 0) == '~') |
d9bc1c99 | 2449 | filename = Fexpand_file_name (filename, Qnil); |
1ffc5c90 RS |
2450 | |
2451 | if (!NILP (Ffile_directory_p (linkname))) | |
dac24db4 | 2452 | linkname = Fexpand_file_name (Ffile_name_nondirectory (filename), linkname); |
1ffc5c90 RS |
2453 | else |
2454 | linkname = Fexpand_file_name (linkname, Qnil); | |
32f4334d RS |
2455 | |
2456 | /* If the file name has special constructs in it, | |
2457 | call the corresponding file handler. */ | |
49307295 | 2458 | handler = Ffind_file_name_handler (filename, Qmake_symbolic_link); |
32f4334d | 2459 | if (!NILP (handler)) |
36712b0a KH |
2460 | RETURN_UNGCPRO (call4 (handler, Qmake_symbolic_link, filename, |
2461 | linkname, ok_if_already_exists)); | |
32f4334d | 2462 | |
adc6741c RS |
2463 | /* If the new link name has special constructs in it, |
2464 | call the corresponding file handler. */ | |
2465 | handler = Ffind_file_name_handler (linkname, Qmake_symbolic_link); | |
2466 | if (!NILP (handler)) | |
2467 | RETURN_UNGCPRO (call4 (handler, Qmake_symbolic_link, filename, | |
2468 | linkname, ok_if_already_exists)); | |
2469 | ||
b1d1b865 RS |
2470 | encoded_filename = ENCODE_FILE (filename); |
2471 | encoded_linkname = ENCODE_FILE (linkname); | |
2472 | ||
265a9e55 | 2473 | if (NILP (ok_if_already_exists) |
93c30b5f | 2474 | || INTEGERP (ok_if_already_exists)) |
a560b856 PE |
2475 | barf_or_query_if_file_exists (linkname, false, "make it a link", |
2476 | INTEGERP (ok_if_already_exists), false); | |
ce2fe65a | 2477 | if (symlink (SSDATA (encoded_filename), SSDATA (encoded_linkname)) < 0) |
570d7624 JB |
2478 | { |
2479 | /* If we didn't complain already, silently delete existing file. */ | |
b648c163 | 2480 | int symlink_errno; |
570d7624 JB |
2481 | if (errno == EEXIST) |
2482 | { | |
42a5b22f | 2483 | unlink (SSDATA (encoded_linkname)); |
ce2fe65a AS |
2484 | if (symlink (SSDATA (encoded_filename), SSDATA (encoded_linkname)) |
2485 | >= 0) | |
1a04498e KH |
2486 | { |
2487 | UNGCPRO; | |
2488 | return Qnil; | |
2489 | } | |
570d7624 | 2490 | } |
d9d0d182 PE |
2491 | if (errno == ENOSYS) |
2492 | { | |
2493 | UNGCPRO; | |
2494 | xsignal1 (Qfile_error, | |
2495 | build_string ("Symbolic links are not supported")); | |
2496 | } | |
570d7624 | 2497 | |
b648c163 PE |
2498 | symlink_errno = errno; |
2499 | report_file_errno ("Making symbolic link", list2 (filename, linkname), | |
2500 | symlink_errno); | |
570d7624 JB |
2501 | } |
2502 | UNGCPRO; | |
2503 | return Qnil; | |
e89b536d | 2504 | } |
570d7624 | 2505 | |
570d7624 | 2506 | \f |
a7ca3326 | 2507 | DEFUN ("file-name-absolute-p", Ffile_name_absolute_p, Sfile_name_absolute_p, |
570d7624 | 2508 | 1, 1, 0, |
8c1a1077 PJ |
2509 | doc: /* Return t if file FILENAME specifies an absolute file name. |
2510 | On Unix, this is a name starting with a `/' or a `~'. */) | |
5842a27b | 2511 | (Lisp_Object filename) |
570d7624 | 2512 | { |
b7826503 | 2513 | CHECK_STRING (filename); |
5976c3fe | 2514 | return file_name_absolute_p (SSDATA (filename)) ? Qt : Qnil; |
570d7624 | 2515 | } |
3beeedfe | 2516 | \f |
a7ca3326 | 2517 | DEFUN ("file-exists-p", Ffile_exists_p, Sfile_exists_p, 1, 1, 0, |
68780e2a RS |
2518 | doc: /* Return t if file FILENAME exists (whether or not you can read it.) |
2519 | See also `file-readable-p' and `file-attributes'. | |
2520 | This returns nil for a symlink to a nonexistent file. | |
2521 | Use `file-symlink-p' to test for such links. */) | |
5842a27b | 2522 | (Lisp_Object filename) |
570d7624 | 2523 | { |
199607e4 | 2524 | Lisp_Object absname; |
32f4334d | 2525 | Lisp_Object handler; |
570d7624 | 2526 | |
b7826503 | 2527 | CHECK_STRING (filename); |
199607e4 | 2528 | absname = Fexpand_file_name (filename, Qnil); |
32f4334d RS |
2529 | |
2530 | /* If the file name has special constructs in it, | |
2531 | call the corresponding file handler. */ | |
199607e4 | 2532 | handler = Ffind_file_name_handler (absname, Qfile_exists_p); |
32f4334d | 2533 | if (!NILP (handler)) |
a773ed9a PE |
2534 | { |
2535 | Lisp_Object result = call2 (handler, Qfile_exists_p, absname); | |
2536 | errno = 0; | |
2537 | return result; | |
2538 | } | |
32f4334d | 2539 | |
b1d1b865 RS |
2540 | absname = ENCODE_FILE (absname); |
2541 | ||
3d798ba7 | 2542 | return check_existing (SSDATA (absname)) ? Qt : Qnil; |
570d7624 JB |
2543 | } |
2544 | ||
2545 | DEFUN ("file-executable-p", Ffile_executable_p, Sfile_executable_p, 1, 1, 0, | |
8c1a1077 PJ |
2546 | doc: /* Return t if FILENAME can be executed by you. |
2547 | For a directory, this means you can access files in that directory. */) | |
5842a27b | 2548 | (Lisp_Object filename) |
570d7624 | 2549 | { |
199607e4 | 2550 | Lisp_Object absname; |
32f4334d | 2551 | Lisp_Object handler; |
570d7624 | 2552 | |
b7826503 | 2553 | CHECK_STRING (filename); |
199607e4 | 2554 | absname = Fexpand_file_name (filename, Qnil); |
32f4334d RS |
2555 | |
2556 | /* If the file name has special constructs in it, | |
2557 | call the corresponding file handler. */ | |
199607e4 | 2558 | handler = Ffind_file_name_handler (absname, Qfile_executable_p); |
32f4334d | 2559 | if (!NILP (handler)) |
199607e4 | 2560 | return call2 (handler, Qfile_executable_p, absname); |
32f4334d | 2561 | |
b1d1b865 RS |
2562 | absname = ENCODE_FILE (absname); |
2563 | ||
42a5b22f | 2564 | return (check_executable (SSDATA (absname)) ? Qt : Qnil); |
570d7624 JB |
2565 | } |
2566 | ||
a7ca3326 | 2567 | DEFUN ("file-readable-p", Ffile_readable_p, Sfile_readable_p, 1, 1, 0, |
8c1a1077 PJ |
2568 | doc: /* Return t if file FILENAME exists and you can read it. |
2569 | See also `file-exists-p' and `file-attributes'. */) | |
5842a27b | 2570 | (Lisp_Object filename) |
570d7624 | 2571 | { |
199607e4 | 2572 | Lisp_Object absname; |
32f4334d | 2573 | Lisp_Object handler; |
570d7624 | 2574 | |
b7826503 | 2575 | CHECK_STRING (filename); |
199607e4 | 2576 | absname = Fexpand_file_name (filename, Qnil); |
32f4334d RS |
2577 | |
2578 | /* If the file name has special constructs in it, | |
2579 | call the corresponding file handler. */ | |
199607e4 | 2580 | handler = Ffind_file_name_handler (absname, Qfile_readable_p); |
32f4334d | 2581 | if (!NILP (handler)) |
199607e4 | 2582 | return call2 (handler, Qfile_readable_p, absname); |
32f4334d | 2583 | |
b1d1b865 | 2584 | absname = ENCODE_FILE (absname); |
73dcdb9f PE |
2585 | return (faccessat (AT_FDCWD, SSDATA (absname), R_OK, AT_EACCESS) == 0 |
2586 | ? Qt : Qnil); | |
570d7624 JB |
2587 | } |
2588 | ||
f793dc6c | 2589 | DEFUN ("file-writable-p", Ffile_writable_p, Sfile_writable_p, 1, 1, 0, |
8c1a1077 | 2590 | doc: /* Return t if file FILENAME can be written or created by you. */) |
5842a27b | 2591 | (Lisp_Object filename) |
f793dc6c | 2592 | { |
b1d1b865 | 2593 | Lisp_Object absname, dir, encoded; |
f793dc6c | 2594 | Lisp_Object handler; |
f793dc6c | 2595 | |
b7826503 | 2596 | CHECK_STRING (filename); |
199607e4 | 2597 | absname = Fexpand_file_name (filename, Qnil); |
f793dc6c RS |
2598 | |
2599 | /* If the file name has special constructs in it, | |
2600 | call the corresponding file handler. */ | |
199607e4 | 2601 | handler = Ffind_file_name_handler (absname, Qfile_writable_p); |
f793dc6c | 2602 | if (!NILP (handler)) |
199607e4 | 2603 | return call2 (handler, Qfile_writable_p, absname); |
f793dc6c | 2604 | |
b1d1b865 | 2605 | encoded = ENCODE_FILE (absname); |
73dcdb9f PE |
2606 | if (check_writable (SSDATA (encoded), W_OK)) |
2607 | return Qt; | |
2608 | if (errno != ENOENT) | |
2609 | return Qnil; | |
b1d1b865 | 2610 | |
199607e4 | 2611 | dir = Ffile_name_directory (absname); |
73dcdb9f | 2612 | eassert (!NILP (dir)); |
f793dc6c | 2613 | #ifdef MSDOS |
73dcdb9f | 2614 | dir = Fdirectory_file_name (dir); |
f793dc6c | 2615 | #endif /* MSDOS */ |
b1d1b865 RS |
2616 | |
2617 | dir = ENCODE_FILE (dir); | |
e3e8a75a GM |
2618 | #ifdef WINDOWSNT |
2619 | /* The read-only attribute of the parent directory doesn't affect | |
2620 | whether a file or directory can be created within it. Some day we | |
2621 | should check ACLs though, which do affect this. */ | |
73dcdb9f | 2622 | return file_directory_p (SDATA (dir)) ? Qt : Qnil; |
e3e8a75a | 2623 | #else |
73dcdb9f | 2624 | return check_writable (SSDATA (dir), W_OK | X_OK) ? Qt : Qnil; |
e3e8a75a | 2625 | #endif |
f793dc6c RS |
2626 | } |
2627 | \f | |
1f8653eb | 2628 | DEFUN ("access-file", Faccess_file, Saccess_file, 2, 2, 0, |
8c1a1077 PJ |
2629 | doc: /* Access file FILENAME, and get an error if that does not work. |
2630 | The second argument STRING is used in the error message. | |
a4e03fe5 | 2631 | If there is no error, returns nil. */) |
5842a27b | 2632 | (Lisp_Object filename, Lisp_Object string) |
1f8653eb | 2633 | { |
49475635 | 2634 | Lisp_Object handler, encoded_filename, absname; |
1f8653eb | 2635 | |
b7826503 | 2636 | CHECK_STRING (filename); |
49475635 EZ |
2637 | absname = Fexpand_file_name (filename, Qnil); |
2638 | ||
b7826503 | 2639 | CHECK_STRING (string); |
1f8653eb RS |
2640 | |
2641 | /* If the file name has special constructs in it, | |
2642 | call the corresponding file handler. */ | |
49475635 | 2643 | handler = Ffind_file_name_handler (absname, Qaccess_file); |
1f8653eb | 2644 | if (!NILP (handler)) |
49475635 | 2645 | return call3 (handler, Qaccess_file, absname, string); |
1f8653eb | 2646 | |
49475635 | 2647 | encoded_filename = ENCODE_FILE (absname); |
b1d1b865 | 2648 | |
a773ed9a | 2649 | if (faccessat (AT_FDCWD, SSDATA (encoded_filename), R_OK, AT_EACCESS) != 0) |
a9757f6a | 2650 | report_file_error (SSDATA (string), filename); |
1f8653eb RS |
2651 | |
2652 | return Qnil; | |
2653 | } | |
2654 | \f | |
8654f9d7 PE |
2655 | /* Relative to directory FD, return the symbolic link value of FILENAME. |
2656 | On failure, return nil. */ | |
2657 | Lisp_Object | |
2658 | emacs_readlinkat (int fd, char const *filename) | |
2659 | { | |
2660 | static struct allocator const emacs_norealloc_allocator = | |
2661 | { xmalloc, NULL, xfree, memory_full }; | |
2662 | Lisp_Object val; | |
2663 | char readlink_buf[1024]; | |
2664 | char *buf = careadlinkat (fd, filename, readlink_buf, sizeof readlink_buf, | |
2665 | &emacs_norealloc_allocator, readlinkat); | |
2666 | if (!buf) | |
2667 | return Qnil; | |
2668 | ||
eeccd06f | 2669 | val = build_unibyte_string (buf); |
8654f9d7 | 2670 | if (buf[0] == '/' && strchr (buf, ':')) |
eeccd06f | 2671 | val = concat2 (build_unibyte_string ("/:"), val); |
8654f9d7 PE |
2672 | if (buf != readlink_buf) |
2673 | xfree (buf); | |
2674 | val = DECODE_FILE (val); | |
2675 | return val; | |
2676 | } | |
2677 | ||
a7ca3326 | 2678 | DEFUN ("file-symlink-p", Ffile_symlink_p, Sfile_symlink_p, 1, 1, 0, |
8c1a1077 | 2679 | doc: /* Return non-nil if file FILENAME is the name of a symbolic link. |
1c353c74 | 2680 | The value is the link target, as a string. |
68780e2a RS |
2681 | Otherwise it returns nil. |
2682 | ||
2683 | This function returns t when given the name of a symlink that | |
2684 | points to a nonexistent file. */) | |
5842a27b | 2685 | (Lisp_Object filename) |
570d7624 | 2686 | { |
32f4334d | 2687 | Lisp_Object handler; |
570d7624 | 2688 | |
b7826503 | 2689 | CHECK_STRING (filename); |
570d7624 JB |
2690 | filename = Fexpand_file_name (filename, Qnil); |
2691 | ||
32f4334d RS |
2692 | /* If the file name has special constructs in it, |
2693 | call the corresponding file handler. */ | |
49307295 | 2694 | handler = Ffind_file_name_handler (filename, Qfile_symlink_p); |
32f4334d RS |
2695 | if (!NILP (handler)) |
2696 | return call2 (handler, Qfile_symlink_p, filename); | |
2697 | ||
b1d1b865 RS |
2698 | filename = ENCODE_FILE (filename); |
2699 | ||
8654f9d7 | 2700 | return emacs_readlinkat (AT_FDCWD, SSDATA (filename)); |
570d7624 JB |
2701 | } |
2702 | ||
a7ca3326 | 2703 | DEFUN ("file-directory-p", Ffile_directory_p, Sfile_directory_p, 1, 1, 0, |
8c1a1077 PJ |
2704 | doc: /* Return t if FILENAME names an existing directory. |
2705 | Symbolic links to directories count as directories. | |
2706 | See `file-symlink-p' to distinguish symlinks. */) | |
5842a27b | 2707 | (Lisp_Object filename) |
570d7624 | 2708 | { |
73dcdb9f | 2709 | Lisp_Object absname; |
32f4334d | 2710 | Lisp_Object handler; |
570d7624 | 2711 | |
4b4deea2 | 2712 | absname = expand_and_dir_to_file (filename, BVAR (current_buffer, directory)); |
570d7624 | 2713 | |
32f4334d RS |
2714 | /* If the file name has special constructs in it, |
2715 | call the corresponding file handler. */ | |
199607e4 | 2716 | handler = Ffind_file_name_handler (absname, Qfile_directory_p); |
32f4334d | 2717 | if (!NILP (handler)) |
199607e4 | 2718 | return call2 (handler, Qfile_directory_p, absname); |
32f4334d | 2719 | |
b1d1b865 RS |
2720 | absname = ENCODE_FILE (absname); |
2721 | ||
73dcdb9f PE |
2722 | return file_directory_p (SSDATA (absname)) ? Qt : Qnil; |
2723 | } | |
2724 | ||
2725 | /* Return true if FILE is a directory or a symlink to a directory. */ | |
2726 | bool | |
2727 | file_directory_p (char const *file) | |
2728 | { | |
2729 | #ifdef WINDOWSNT | |
2730 | /* This is cheaper than 'stat'. */ | |
2731 | return faccessat (AT_FDCWD, file, D_OK, AT_EACCESS) == 0; | |
2732 | #else | |
2733 | struct stat st; | |
2734 | return stat (file, &st) == 0 && S_ISDIR (st.st_mode); | |
2735 | #endif | |
570d7624 JB |
2736 | } |
2737 | ||
a7ca3326 | 2738 | DEFUN ("file-accessible-directory-p", Ffile_accessible_directory_p, |
16a97296 | 2739 | Sfile_accessible_directory_p, 1, 1, 0, |
e385ec41 RS |
2740 | doc: /* Return t if file FILENAME names a directory you can open. |
2741 | For the value to be t, FILENAME must specify the name of a directory as a file, | |
2742 | and the directory must allow you to open files in it. In order to use a | |
8c1a1077 PJ |
2743 | directory as a buffer's current directory, this predicate must return true. |
2744 | A directory name spec may be given instead; then the value is t | |
2745 | if the directory so specified exists and really is a readable and | |
2746 | searchable directory. */) | |
5842a27b | 2747 | (Lisp_Object filename) |
b72dea2a | 2748 | { |
73dcdb9f | 2749 | Lisp_Object absname; |
32f4334d | 2750 | Lisp_Object handler; |
73dcdb9f PE |
2751 | |
2752 | CHECK_STRING (filename); | |
2753 | absname = Fexpand_file_name (filename, Qnil); | |
32f4334d RS |
2754 | |
2755 | /* If the file name has special constructs in it, | |
2756 | call the corresponding file handler. */ | |
73dcdb9f | 2757 | handler = Ffind_file_name_handler (absname, Qfile_accessible_directory_p); |
32f4334d | 2758 | if (!NILP (handler)) |
a773ed9a PE |
2759 | { |
2760 | Lisp_Object r = call2 (handler, Qfile_accessible_directory_p, absname); | |
2761 | errno = 0; | |
2762 | return r; | |
2763 | } | |
32f4334d | 2764 | |
73dcdb9f PE |
2765 | absname = ENCODE_FILE (absname); |
2766 | return file_accessible_directory_p (SSDATA (absname)) ? Qt : Qnil; | |
2767 | } | |
2768 | ||
2769 | /* If FILE is a searchable directory or a symlink to a | |
2770 | searchable directory, return true. Otherwise return | |
2771 | false and set errno to an error number. */ | |
2772 | bool | |
2773 | file_accessible_directory_p (char const *file) | |
2774 | { | |
2775 | #ifdef DOS_NT | |
2776 | /* There's no need to test whether FILE is searchable, as the | |
2777 | searchable/executable bit is invented on DOS_NT platforms. */ | |
2778 | return file_directory_p (file); | |
2779 | #else | |
2780 | /* On POSIXish platforms, use just one system call; this avoids a | |
2781 | race and is typically faster. */ | |
2782 | ptrdiff_t len = strlen (file); | |
2783 | char const *dir; | |
2784 | bool ok; | |
2785 | int saved_errno; | |
2786 | USE_SAFE_ALLOCA; | |
2787 | ||
2788 | /* Normally a file "FOO" is an accessible directory if "FOO/." exists. | |
2789 | There are three exceptions: "", "/", and "//". Leave "" alone, | |
2790 | as it's invalid. Append only "." to the other two exceptions as | |
2791 | "/" and "//" are distinct on some platforms, whereas "/", "///", | |
2792 | "////", etc. are all equivalent. */ | |
2793 | if (! len) | |
2794 | dir = file; | |
2795 | else | |
2796 | { | |
2797 | /* Just check for trailing '/' when deciding whether to append '/'. | |
2798 | That's simpler than testing the two special cases "/" and "//", | |
2799 | and it's a safe optimization here. */ | |
2800 | char *buf = SAFE_ALLOCA (len + 3); | |
2801 | memcpy (buf, file, len); | |
31ff141c | 2802 | strcpy (buf + len, &"/."[file[len - 1] == '/']); |
73dcdb9f PE |
2803 | dir = buf; |
2804 | } | |
2805 | ||
2806 | ok = check_existing (dir); | |
2807 | saved_errno = errno; | |
2808 | SAFE_FREE (); | |
2809 | errno = saved_errno; | |
2810 | return ok; | |
2811 | #endif | |
b72dea2a JB |
2812 | } |
2813 | ||
f793dc6c | 2814 | DEFUN ("file-regular-p", Ffile_regular_p, Sfile_regular_p, 1, 1, 0, |
19a9c3b7 LH |
2815 | doc: /* Return t if FILENAME names a regular file. |
2816 | This is the sort of file that holds an ordinary stream of data bytes. | |
2817 | Symbolic links to regular files count as regular files. | |
2818 | See `file-symlink-p' to distinguish symlinks. */) | |
5842a27b | 2819 | (Lisp_Object filename) |
f793dc6c | 2820 | { |
199607e4 | 2821 | register Lisp_Object absname; |
f793dc6c RS |
2822 | struct stat st; |
2823 | Lisp_Object handler; | |
2824 | ||
4b4deea2 | 2825 | absname = expand_and_dir_to_file (filename, BVAR (current_buffer, directory)); |
f793dc6c RS |
2826 | |
2827 | /* If the file name has special constructs in it, | |
2828 | call the corresponding file handler. */ | |
199607e4 | 2829 | handler = Ffind_file_name_handler (absname, Qfile_regular_p); |
f793dc6c | 2830 | if (!NILP (handler)) |
199607e4 | 2831 | return call2 (handler, Qfile_regular_p, absname); |
f793dc6c | 2832 | |
b1d1b865 RS |
2833 | absname = ENCODE_FILE (absname); |
2834 | ||
c1c4693e RS |
2835 | #ifdef WINDOWSNT |
2836 | { | |
2837 | int result; | |
2838 | Lisp_Object tem = Vw32_get_true_file_attributes; | |
2839 | ||
2840 | /* Tell stat to use expensive method to get accurate info. */ | |
2841 | Vw32_get_true_file_attributes = Qt; | |
d5db4077 | 2842 | result = stat (SDATA (absname), &st); |
c1c4693e RS |
2843 | Vw32_get_true_file_attributes = tem; |
2844 | ||
2845 | if (result < 0) | |
2846 | return Qnil; | |
f68c809d | 2847 | return S_ISREG (st.st_mode) ? Qt : Qnil; |
c1c4693e RS |
2848 | } |
2849 | #else | |
42a5b22f | 2850 | if (stat (SSDATA (absname), &st) < 0) |
f793dc6c | 2851 | return Qnil; |
f68c809d | 2852 | return S_ISREG (st.st_mode) ? Qt : Qnil; |
c1c4693e | 2853 | #endif |
f793dc6c RS |
2854 | } |
2855 | \f | |
574c05e2 KK |
2856 | DEFUN ("file-selinux-context", Ffile_selinux_context, |
2857 | Sfile_selinux_context, 1, 1, 0, | |
fa74b241 CY |
2858 | doc: /* Return SELinux context of file named FILENAME. |
2859 | The return value is a list (USER ROLE TYPE RANGE), where the list | |
2860 | elements are strings naming the user, role, type, and range of the | |
2861 | file's SELinux security context. | |
2862 | ||
2863 | Return (nil nil nil nil) if the file is nonexistent or inaccessible, | |
2864 | or if SELinux is disabled, or if Emacs lacks SELinux support. */) | |
5842a27b | 2865 | (Lisp_Object filename) |
574c05e2 KK |
2866 | { |
2867 | Lisp_Object absname; | |
2868 | Lisp_Object values[4]; | |
2869 | Lisp_Object handler; | |
2870 | #if HAVE_LIBSELINUX | |
2871 | security_context_t con; | |
2872 | int conlength; | |
2873 | context_t context; | |
2874 | #endif | |
2875 | ||
4b4deea2 | 2876 | absname = expand_and_dir_to_file (filename, BVAR (current_buffer, directory)); |
574c05e2 KK |
2877 | |
2878 | /* If the file name has special constructs in it, | |
2879 | call the corresponding file handler. */ | |
2880 | handler = Ffind_file_name_handler (absname, Qfile_selinux_context); | |
2881 | if (!NILP (handler)) | |
2882 | return call2 (handler, Qfile_selinux_context, absname); | |
2883 | ||
2884 | absname = ENCODE_FILE (absname); | |
2885 | ||
2886 | values[0] = Qnil; | |
2887 | values[1] = Qnil; | |
2888 | values[2] = Qnil; | |
2889 | values[3] = Qnil; | |
2890 | #if HAVE_LIBSELINUX | |
2891 | if (is_selinux_enabled ()) | |
2892 | { | |
b14aac08 | 2893 | conlength = lgetfilecon (SSDATA (absname), &con); |
574c05e2 KK |
2894 | if (conlength > 0) |
2895 | { | |
2896 | context = context_new (con); | |
45841e65 KK |
2897 | if (context_user_get (context)) |
2898 | values[0] = build_string (context_user_get (context)); | |
2899 | if (context_role_get (context)) | |
2900 | values[1] = build_string (context_role_get (context)); | |
2901 | if (context_type_get (context)) | |
2902 | values[2] = build_string (context_type_get (context)); | |
2903 | if (context_range_get (context)) | |
2904 | values[3] = build_string (context_range_get (context)); | |
574c05e2 | 2905 | context_free (context); |
c6ba4138 | 2906 | freecon (con); |
574c05e2 | 2907 | } |
574c05e2 KK |
2908 | } |
2909 | #endif | |
2910 | ||
5e617bc2 | 2911 | return Flist (sizeof (values) / sizeof (values[0]), values); |
574c05e2 KK |
2912 | } |
2913 | \f | |
2914 | DEFUN ("set-file-selinux-context", Fset_file_selinux_context, | |
2915 | Sset_file_selinux_context, 2, 2, 0, | |
fa74b241 CY |
2916 | doc: /* Set SELinux context of file named FILENAME to CONTEXT. |
2917 | CONTEXT should be a list (USER ROLE TYPE RANGE), where the list | |
2918 | elements are strings naming the components of a SELinux context. | |
2919 | ||
ccad023b EZ |
2920 | Value is t if setting of SELinux context was successful, nil otherwise. |
2921 | ||
2922 | This function does nothing and returns nil if SELinux is disabled, | |
2923 | or if Emacs was not compiled with SELinux support. */) | |
5842a27b | 2924 | (Lisp_Object filename, Lisp_Object context) |
574c05e2 | 2925 | { |
0f4a96b5 | 2926 | Lisp_Object absname; |
574c05e2 | 2927 | Lisp_Object handler; |
0f4a96b5 JB |
2928 | #if HAVE_LIBSELINUX |
2929 | Lisp_Object encoded_absname; | |
574c05e2 KK |
2930 | Lisp_Object user = CAR_SAFE (context); |
2931 | Lisp_Object role = CAR_SAFE (CDR_SAFE (context)); | |
2932 | Lisp_Object type = CAR_SAFE (CDR_SAFE (CDR_SAFE (context))); | |
2933 | Lisp_Object range = CAR_SAFE (CDR_SAFE (CDR_SAFE (CDR_SAFE (context)))); | |
574c05e2 | 2934 | security_context_t con; |
f75d7a91 PE |
2935 | bool fail; |
2936 | int conlength; | |
574c05e2 KK |
2937 | context_t parsed_con; |
2938 | #endif | |
2939 | ||
4b4deea2 | 2940 | absname = Fexpand_file_name (filename, BVAR (current_buffer, directory)); |
574c05e2 KK |
2941 | |
2942 | /* If the file name has special constructs in it, | |
2943 | call the corresponding file handler. */ | |
2944 | handler = Ffind_file_name_handler (absname, Qset_file_selinux_context); | |
2945 | if (!NILP (handler)) | |
2946 | return call3 (handler, Qset_file_selinux_context, absname, context); | |
2947 | ||
0f4a96b5 | 2948 | #if HAVE_LIBSELINUX |
574c05e2 KK |
2949 | if (is_selinux_enabled ()) |
2950 | { | |
2951 | /* Get current file context. */ | |
a9b53ad3 | 2952 | encoded_absname = ENCODE_FILE (absname); |
b14aac08 | 2953 | conlength = lgetfilecon (SSDATA (encoded_absname), &con); |
574c05e2 KK |
2954 | if (conlength > 0) |
2955 | { | |
2956 | parsed_con = context_new (con); | |
2957 | /* Change the parts defined in the parameter.*/ | |
2958 | if (STRINGP (user)) | |
2959 | { | |
b14aac08 | 2960 | if (context_user_set (parsed_con, SSDATA (user))) |
574c05e2 KK |
2961 | error ("Doing context_user_set"); |
2962 | } | |
2963 | if (STRINGP (role)) | |
2964 | { | |
b14aac08 | 2965 | if (context_role_set (parsed_con, SSDATA (role))) |
574c05e2 KK |
2966 | error ("Doing context_role_set"); |
2967 | } | |
2968 | if (STRINGP (type)) | |
2969 | { | |
b14aac08 | 2970 | if (context_type_set (parsed_con, SSDATA (type))) |
574c05e2 KK |
2971 | error ("Doing context_type_set"); |
2972 | } | |
2973 | if (STRINGP (range)) | |
2974 | { | |
b14aac08 | 2975 | if (context_range_set (parsed_con, SSDATA (range))) |
574c05e2 KK |
2976 | error ("Doing context_range_set"); |
2977 | } | |
2978 | ||
24c51a09 | 2979 | /* Set the modified context back to the file. */ |
f75d7a91 PE |
2980 | fail = (lsetfilecon (SSDATA (encoded_absname), |
2981 | context_str (parsed_con)) | |
2982 | != 0); | |
24c51a09 GM |
2983 | /* See http://debbugs.gnu.org/11245 for ENOTSUP. */ |
2984 | if (fail && errno != ENOTSUP) | |
a9757f6a | 2985 | report_file_error ("Doing lsetfilecon", absname); |
574c05e2 KK |
2986 | |
2987 | context_free (parsed_con); | |
c6ba4138 | 2988 | freecon (con); |
c1fea2c0 | 2989 | return fail ? Qnil : Qt; |
574c05e2 KK |
2990 | } |
2991 | else | |
a9757f6a | 2992 | report_file_error ("Doing lgetfilecon", absname); |
574c05e2 KK |
2993 | } |
2994 | #endif | |
2995 | ||
2996 | return Qnil; | |
2997 | } | |
2998 | \f | |
7c3d167f | 2999 | DEFUN ("file-acl", Ffile_acl, Sfile_acl, 1, 1, 0, |
553081a5 SM |
3000 | doc: /* Return ACL entries of file named FILENAME. |
3001 | The entries are returned in a format suitable for use in `set-file-acl' | |
3002 | but is otherwise undocumented and subject to change. | |
7c3d167f | 3003 | Return nil if file does not exist or is not accessible, or if Emacs |
553081a5 | 3004 | was unable to determine the ACL entries. */) |
7c3d167f RF |
3005 | (Lisp_Object filename) |
3006 | { | |
3007 | Lisp_Object absname; | |
3008 | Lisp_Object handler; | |
ffdc270a | 3009 | #ifdef HAVE_ACL_SET_FILE |
7c3d167f RF |
3010 | acl_t acl; |
3011 | Lisp_Object acl_string; | |
3012 | char *str; | |
3013 | #endif | |
3014 | ||
3015 | absname = expand_and_dir_to_file (filename, | |
3016 | BVAR (current_buffer, directory)); | |
3017 | ||
3018 | /* If the file name has special constructs in it, | |
3019 | call the corresponding file handler. */ | |
3020 | handler = Ffind_file_name_handler (absname, Qfile_acl); | |
3021 | if (!NILP (handler)) | |
3022 | return call2 (handler, Qfile_acl, absname); | |
3023 | ||
ffdc270a | 3024 | #ifdef HAVE_ACL_SET_FILE |
7c3d167f RF |
3025 | absname = ENCODE_FILE (absname); |
3026 | ||
3027 | acl = acl_get_file (SSDATA (absname), ACL_TYPE_ACCESS); | |
3028 | if (acl == NULL) | |
3029 | return Qnil; | |
3030 | ||
3031 | str = acl_to_text (acl, NULL); | |
3032 | if (str == NULL) | |
3033 | { | |
3034 | acl_free (acl); | |
3035 | return Qnil; | |
3036 | } | |
3037 | ||
3038 | acl_string = build_string (str); | |
3039 | acl_free (str); | |
3040 | acl_free (acl); | |
3041 | ||
3042 | return acl_string; | |
3043 | #endif | |
3044 | ||
3045 | return Qnil; | |
3046 | } | |
3047 | ||
3048 | DEFUN ("set-file-acl", Fset_file_acl, Sset_file_acl, | |
3049 | 2, 2, 0, | |
3050 | doc: /* Set ACL of file named FILENAME to ACL-STRING. | |
3051 | ACL-STRING should contain the textual representation of the ACL | |
3052 | entries in a format suitable for the platform. | |
3053 | ||
ccad023b EZ |
3054 | Value is t if setting of ACL was successful, nil otherwise. |
3055 | ||
7c3d167f RF |
3056 | Setting ACL for local files requires Emacs to be built with ACL |
3057 | support. */) | |
3058 | (Lisp_Object filename, Lisp_Object acl_string) | |
3059 | { | |
3060 | Lisp_Object absname; | |
3061 | Lisp_Object handler; | |
ffdc270a | 3062 | #ifdef HAVE_ACL_SET_FILE |
7c3d167f RF |
3063 | Lisp_Object encoded_absname; |
3064 | acl_t acl; | |
3065 | bool fail; | |
3066 | #endif | |
3067 | ||
3068 | absname = Fexpand_file_name (filename, BVAR (current_buffer, directory)); | |
3069 | ||
3070 | /* If the file name has special constructs in it, | |
3071 | call the corresponding file handler. */ | |
3072 | handler = Ffind_file_name_handler (absname, Qset_file_acl); | |
3073 | if (!NILP (handler)) | |
3074 | return call3 (handler, Qset_file_acl, absname, acl_string); | |
3075 | ||
ffdc270a | 3076 | #ifdef HAVE_ACL_SET_FILE |
7c3d167f RF |
3077 | if (STRINGP (acl_string)) |
3078 | { | |
3079 | acl = acl_from_text (SSDATA (acl_string)); | |
3080 | if (acl == NULL) | |
3081 | { | |
a9757f6a | 3082 | report_file_error ("Converting ACL", absname); |
7c3d167f RF |
3083 | return Qnil; |
3084 | } | |
3085 | ||
3086 | encoded_absname = ENCODE_FILE (absname); | |
3087 | ||
3088 | fail = (acl_set_file (SSDATA (encoded_absname), ACL_TYPE_ACCESS, | |
3089 | acl) | |
3090 | != 0); | |
ffdc270a | 3091 | if (fail && acl_errno_valid (errno)) |
a9757f6a | 3092 | report_file_error ("Setting ACL", absname); |
7c3d167f RF |
3093 | |
3094 | acl_free (acl); | |
c1fea2c0 | 3095 | return fail ? Qnil : Qt; |
7c3d167f RF |
3096 | } |
3097 | #endif | |
3098 | ||
3099 | return Qnil; | |
3100 | } | |
3101 | \f | |
570d7624 | 3102 | DEFUN ("file-modes", Ffile_modes, Sfile_modes, 1, 1, 0, |
d4a42098 KS |
3103 | doc: /* Return mode bits of file named FILENAME, as an integer. |
3104 | Return nil, if file does not exist or is not accessible. */) | |
5842a27b | 3105 | (Lisp_Object filename) |
570d7624 | 3106 | { |
199607e4 | 3107 | Lisp_Object absname; |
570d7624 | 3108 | struct stat st; |
32f4334d | 3109 | Lisp_Object handler; |
570d7624 | 3110 | |
4b4deea2 | 3111 | absname = expand_and_dir_to_file (filename, BVAR (current_buffer, directory)); |
570d7624 | 3112 | |
32f4334d RS |
3113 | /* If the file name has special constructs in it, |
3114 | call the corresponding file handler. */ | |
199607e4 | 3115 | handler = Ffind_file_name_handler (absname, Qfile_modes); |
32f4334d | 3116 | if (!NILP (handler)) |
199607e4 | 3117 | return call2 (handler, Qfile_modes, absname); |
32f4334d | 3118 | |
b1d1b865 RS |
3119 | absname = ENCODE_FILE (absname); |
3120 | ||
42a5b22f | 3121 | if (stat (SSDATA (absname), &st) < 0) |
570d7624 | 3122 | return Qnil; |
3ace87e3 | 3123 | |
570d7624 JB |
3124 | return make_number (st.st_mode & 07777); |
3125 | } | |
3126 | ||
09fbdf6c MC |
3127 | DEFUN ("set-file-modes", Fset_file_modes, Sset_file_modes, 2, 2, |
3128 | "(let ((file (read-file-name \"File: \"))) \ | |
3129 | (list file (read-file-modes nil file)))", | |
8c1a1077 | 3130 | doc: /* Set mode bits of file named FILENAME to MODE (an integer). |
ea429250 EZ |
3131 | Only the 12 low bits of MODE are used. |
3132 | ||
3133 | Interactively, mode bits are read by `read-file-modes', which accepts | |
712adc82 | 3134 | symbolic notation, like the `chmod' command from GNU Coreutils. */) |
5842a27b | 3135 | (Lisp_Object filename, Lisp_Object mode) |
570d7624 | 3136 | { |
b1d1b865 | 3137 | Lisp_Object absname, encoded_absname; |
32f4334d | 3138 | Lisp_Object handler; |
570d7624 | 3139 | |
4b4deea2 | 3140 | absname = Fexpand_file_name (filename, BVAR (current_buffer, directory)); |
b7826503 | 3141 | CHECK_NUMBER (mode); |
570d7624 | 3142 | |
32f4334d RS |
3143 | /* If the file name has special constructs in it, |
3144 | call the corresponding file handler. */ | |
199607e4 | 3145 | handler = Ffind_file_name_handler (absname, Qset_file_modes); |
32f4334d | 3146 | if (!NILP (handler)) |
199607e4 | 3147 | return call3 (handler, Qset_file_modes, absname, mode); |
32f4334d | 3148 | |
b1d1b865 RS |
3149 | encoded_absname = ENCODE_FILE (absname); |
3150 | ||
18c52557 | 3151 | if (chmod (SSDATA (encoded_absname), XINT (mode) & 07777) < 0) |
a9757f6a | 3152 | report_file_error ("Doing chmod", absname); |
570d7624 JB |
3153 | |
3154 | return Qnil; | |
3155 | } | |
3156 | ||
c24e9a53 | 3157 | DEFUN ("set-default-file-modes", Fset_default_file_modes, Sset_default_file_modes, 1, 1, 0, |
8c1a1077 PJ |
3158 | doc: /* Set the file permission bits for newly created files. |
3159 | The argument MODE should be an integer; only the low 9 bits are used. | |
3160 | This setting is inherited by subprocesses. */) | |
5842a27b | 3161 | (Lisp_Object mode) |
36a8c287 | 3162 | { |
a560b856 | 3163 | mode_t oldrealmask, oldumask, newumask; |
b7826503 | 3164 | CHECK_NUMBER (mode); |
a560b856 PE |
3165 | oldrealmask = realmask; |
3166 | newumask = ~ XINT (mode) & 0777; | |
199607e4 | 3167 | |
a560b856 PE |
3168 | block_input (); |
3169 | realmask = newumask; | |
3170 | oldumask = umask (newumask); | |
3171 | unblock_input (); | |
36a8c287 | 3172 | |
a560b856 | 3173 | eassert (oldumask == oldrealmask); |
36a8c287 JB |
3174 | return Qnil; |
3175 | } | |
3176 | ||
c24e9a53 | 3177 | DEFUN ("default-file-modes", Fdefault_file_modes, Sdefault_file_modes, 0, 0, 0, |
8c1a1077 PJ |
3178 | doc: /* Return the default file protection for created files. |
3179 | The value is an integer. */) | |
5842a27b | 3180 | (void) |
36a8c287 | 3181 | { |
5f85ea58 | 3182 | Lisp_Object value; |
46283abe | 3183 | XSETINT (value, (~ realmask) & 0777); |
5f85ea58 | 3184 | return value; |
36a8c287 | 3185 | } |
819da85b | 3186 | \f |
819da85b EZ |
3187 | |
3188 | DEFUN ("set-file-times", Fset_file_times, Sset_file_times, 1, 2, 0, | |
f839df0c | 3189 | doc: /* Set times of file FILENAME to TIMESTAMP. |
819da85b EZ |
3190 | Set both access and modification times. |
3191 | Return t on success, else nil. | |
f839df0c | 3192 | Use the current time if TIMESTAMP is nil. TIMESTAMP is in the format of |
819da85b | 3193 | `current-time'. */) |
f839df0c | 3194 | (Lisp_Object filename, Lisp_Object timestamp) |
819da85b EZ |
3195 | { |
3196 | Lisp_Object absname, encoded_absname; | |
3197 | Lisp_Object handler; | |
43aac990 | 3198 | struct timespec t = lisp_time_argument (timestamp); |
819da85b | 3199 | |
4b4deea2 | 3200 | absname = Fexpand_file_name (filename, BVAR (current_buffer, directory)); |
819da85b EZ |
3201 | |
3202 | /* If the file name has special constructs in it, | |
3203 | call the corresponding file handler. */ | |
3204 | handler = Ffind_file_name_handler (absname, Qset_file_times); | |
3205 | if (!NILP (handler)) | |
f839df0c | 3206 | return call3 (handler, Qset_file_times, absname, timestamp); |
819da85b EZ |
3207 | |
3208 | encoded_absname = ENCODE_FILE (absname); | |
5df5e07c | 3209 | |
819da85b | 3210 | { |
96c06863 | 3211 | if (set_file_times (-1, SSDATA (encoded_absname), t, t) != 0) |
819da85b | 3212 | { |
0d9f584b | 3213 | #ifdef MSDOS |
819da85b | 3214 | /* Setting times on a directory always fails. */ |
73dcdb9f | 3215 | if (file_directory_p (SSDATA (encoded_absname))) |
819da85b EZ |
3216 | return Qnil; |
3217 | #endif | |
a9757f6a | 3218 | report_file_error ("Setting file times", absname); |
819da85b EZ |
3219 | } |
3220 | } | |
5df5e07c | 3221 | |
819da85b EZ |
3222 | return Qt; |
3223 | } | |
f793dc6c | 3224 | \f |
697c17a2 | 3225 | #ifdef HAVE_SYNC |
85ffea93 | 3226 | DEFUN ("unix-sync", Funix_sync, Sunix_sync, 0, 0, "", |
8c1a1077 | 3227 | doc: /* Tell Unix to finish all pending disk updates. */) |
5842a27b | 3228 | (void) |
85ffea93 RS |
3229 | { |
3230 | sync (); | |
3231 | return Qnil; | |
3232 | } | |
3233 | ||
697c17a2 | 3234 | #endif /* HAVE_SYNC */ |
85ffea93 | 3235 | |
570d7624 | 3236 | DEFUN ("file-newer-than-file-p", Ffile_newer_than_file_p, Sfile_newer_than_file_p, 2, 2, 0, |
8c1a1077 PJ |
3237 | doc: /* Return t if file FILE1 is newer than file FILE2. |
3238 | If FILE1 does not exist, the answer is nil; | |
3239 | otherwise, if FILE2 does not exist, the answer is t. */) | |
5842a27b | 3240 | (Lisp_Object file1, Lisp_Object file2) |
570d7624 | 3241 | { |
199607e4 | 3242 | Lisp_Object absname1, absname2; |
39adff0d | 3243 | struct stat st1, st2; |
32f4334d | 3244 | Lisp_Object handler; |
09121adc | 3245 | struct gcpro gcpro1, gcpro2; |
570d7624 | 3246 | |
b7826503 PJ |
3247 | CHECK_STRING (file1); |
3248 | CHECK_STRING (file2); | |
570d7624 | 3249 | |
199607e4 RS |
3250 | absname1 = Qnil; |
3251 | GCPRO2 (absname1, file2); | |
4b4deea2 TT |
3252 | absname1 = expand_and_dir_to_file (file1, BVAR (current_buffer, directory)); |
3253 | absname2 = expand_and_dir_to_file (file2, BVAR (current_buffer, directory)); | |
09121adc | 3254 | UNGCPRO; |
570d7624 | 3255 | |
32f4334d RS |
3256 | /* If the file name has special constructs in it, |
3257 | call the corresponding file handler. */ | |
199607e4 | 3258 | handler = Ffind_file_name_handler (absname1, Qfile_newer_than_file_p); |
51cf6d37 | 3259 | if (NILP (handler)) |
199607e4 | 3260 | handler = Ffind_file_name_handler (absname2, Qfile_newer_than_file_p); |
32f4334d | 3261 | if (!NILP (handler)) |
199607e4 | 3262 | return call3 (handler, Qfile_newer_than_file_p, absname1, absname2); |
32f4334d | 3263 | |
b1d1b865 RS |
3264 | GCPRO2 (absname1, absname2); |
3265 | absname1 = ENCODE_FILE (absname1); | |
3266 | absname2 = ENCODE_FILE (absname2); | |
3267 | UNGCPRO; | |
3268 | ||
39adff0d | 3269 | if (stat (SSDATA (absname1), &st1) < 0) |
570d7624 JB |
3270 | return Qnil; |
3271 | ||
39adff0d | 3272 | if (stat (SSDATA (absname2), &st2) < 0) |
570d7624 JB |
3273 | return Qt; |
3274 | ||
43aac990 | 3275 | return (timespec_cmp (get_stat_mtime (&st2), get_stat_mtime (&st1)) < 0 |
39adff0d | 3276 | ? Qt : Qnil); |
570d7624 JB |
3277 | } |
3278 | \f | |
6fdaa9a0 KH |
3279 | #ifndef READ_BUF_SIZE |
3280 | #define READ_BUF_SIZE (64 << 10) | |
3281 | #endif | |
d311d28c PE |
3282 | /* Some buffer offsets are stored in 'int' variables. */ |
3283 | verify (READ_BUF_SIZE <= INT_MAX); | |
6fdaa9a0 | 3284 | |
98a7d268 KH |
3285 | /* This function is called after Lisp functions to decide a coding |
3286 | system are called, or when they cause an error. Before they are | |
3287 | called, the current buffer is set unibyte and it contains only a | |
3288 | newly inserted text (thus the buffer was empty before the | |
3289 | insertion). | |
3290 | ||
3291 | The functions may set markers, overlays, text properties, or even | |
3292 | alter the buffer contents, change the current buffer. | |
3293 | ||
3294 | Here, we reset all those changes by: | |
3295 | o set back the current buffer. | |
3296 | o move all markers and overlays to BEG. | |
3297 | o remove all text properties. | |
3298 | o set back the buffer multibyteness. */ | |
f736ffbf | 3299 | |
27e498e6 | 3300 | static void |
971de7fb | 3301 | decide_coding_unwind (Lisp_Object unwind_data) |
f736ffbf | 3302 | { |
98a7d268 | 3303 | Lisp_Object multibyte, undo_list, buffer; |
f736ffbf | 3304 | |
98a7d268 KH |
3305 | multibyte = XCAR (unwind_data); |
3306 | unwind_data = XCDR (unwind_data); | |
3307 | undo_list = XCAR (unwind_data); | |
3308 | buffer = XCDR (unwind_data); | |
3309 | ||
a3d794a1 | 3310 | set_buffer_internal (XBUFFER (buffer)); |
98a7d268 KH |
3311 | adjust_markers_for_delete (BEG, BEG_BYTE, Z, Z_BYTE); |
3312 | adjust_overlays_for_delete (BEG, Z - BEG); | |
0c94c8d6 | 3313 | set_buffer_intervals (current_buffer, NULL); |
98a7d268 KH |
3314 | TEMP_SET_PT_BOTH (BEG, BEG_BYTE); |
3315 | ||
3316 | /* Now we are safe to change the buffer's multibyteness directly. */ | |
39eb03f1 PE |
3317 | bset_enable_multibyte_characters (current_buffer, multibyte); |
3318 | bset_undo_list (current_buffer, undo_list); | |
f736ffbf KH |
3319 | } |
3320 | ||
2ef88fd4 | 3321 | /* Read from a non-regular file. STATE is a Lisp_Save_Value |
3346c1d0 DA |
3322 | object where slot 0 is the file descriptor, slot 1 specifies |
3323 | an offset to put the read bytes, and slot 2 is the maximum | |
3324 | amount of bytes to read. Value is the number of bytes read. */ | |
55587f8a GM |
3325 | |
3326 | static Lisp_Object | |
2ef88fd4 | 3327 | read_non_regular (Lisp_Object state) |
55587f8a | 3328 | { |
d311d28c | 3329 | int nbytes; |
efdc16c9 | 3330 | |
1b978129 GM |
3331 | immediate_quit = 1; |
3332 | QUIT; | |
3346c1d0 | 3333 | nbytes = emacs_read (XSAVE_INTEGER (state, 0), |
5976c3fe | 3334 | ((char *) BEG_ADDR + PT_BYTE - BEG_BYTE |
3346c1d0 DA |
3335 | + XSAVE_INTEGER (state, 1)), |
3336 | XSAVE_INTEGER (state, 2)); | |
1b978129 | 3337 | immediate_quit = 0; |
e07469fa DA |
3338 | /* Fast recycle this object for the likely next call. */ |
3339 | free_misc (state); | |
1b978129 GM |
3340 | return make_number (nbytes); |
3341 | } | |
55587f8a | 3342 | |
2ef88fd4 DA |
3343 | |
3344 | /* Condition-case handler used when reading from non-regular files | |
3345 | in insert-file-contents. */ | |
1b978129 GM |
3346 | |
3347 | static Lisp_Object | |
2ef88fd4 | 3348 | read_non_regular_quit (Lisp_Object ignore) |
1b978129 | 3349 | { |
55587f8a GM |
3350 | return Qnil; |
3351 | } | |
3352 | ||
b3fbb395 PE |
3353 | /* Return the file offset that VAL represents, checking for type |
3354 | errors and overflow. */ | |
e69dafad | 3355 | static off_t |
b3fbb395 | 3356 | file_offset (Lisp_Object val) |
e69dafad | 3357 | { |
b3fbb395 PE |
3358 | if (RANGED_INTEGERP (0, val, TYPE_MAXIMUM (off_t))) |
3359 | return XINT (val); | |
3360 | ||
3361 | if (FLOATP (val)) | |
e69dafad | 3362 | { |
b3fbb395 | 3363 | double v = XFLOAT_DATA (val); |
7216e43b | 3364 | if (0 <= v |
b3fbb395 PE |
3365 | && (sizeof (off_t) < sizeof v |
3366 | ? v <= TYPE_MAXIMUM (off_t) | |
3367 | : v < TYPE_MAXIMUM (off_t))) | |
3368 | return v; | |
e69dafad | 3369 | } |
b3fbb395 PE |
3370 | |
3371 | wrong_type_argument (intern ("file-offset"), val); | |
e69dafad PE |
3372 | } |
3373 | ||
f0941253 | 3374 | /* Return a special time value indicating the error number ERRNUM. */ |
43aac990 | 3375 | static struct timespec |
f0941253 | 3376 | time_error_value (int errnum) |
dbeed9a6 | 3377 | { |
0497dc44 | 3378 | int ns = (errnum == ENOENT || errnum == EACCES || errnum == ENOTDIR |
dbeed9a6 PE |
3379 | ? NONEXISTENT_MODTIME_NSECS |
3380 | : UNKNOWN_MODTIME_NSECS); | |
43aac990 | 3381 | return make_timespec (0, ns); |
dbeed9a6 | 3382 | } |
55587f8a | 3383 | |
570d7624 | 3384 | DEFUN ("insert-file-contents", Finsert_file_contents, Sinsert_file_contents, |
8c1a1077 PJ |
3385 | 1, 5, 0, |
3386 | doc: /* Insert contents of file FILENAME after point. | |
cf6d2357 | 3387 | Returns list of absolute file name and number of characters inserted. |
6f2528d8 MR |
3388 | If second argument VISIT is non-nil, the buffer's visited filename and |
3389 | last save file modtime are set, and it is marked unmodified. If | |
3390 | visiting and the file does not exist, visiting is completed before the | |
3391 | error is signaled. | |
3392 | ||
3393 | The optional third and fourth arguments BEG and END specify what portion | |
3394 | of the file to insert. These arguments count bytes in the file, not | |
3395 | characters in the buffer. If VISIT is non-nil, BEG and END must be nil. | |
3396 | ||
3397 | If optional fifth argument REPLACE is non-nil, replace the current | |
3398 | buffer contents (in the accessible portion) with the file contents. | |
3399 | This is better than simply deleting and inserting the whole thing | |
3400 | because (1) it preserves some marker positions and (2) it puts less data | |
3401 | in the undo list. When REPLACE is non-nil, the second return value is | |
3402 | the number of characters that replace previous buffer contents. | |
3403 | ||
3404 | This function does code conversion according to the value of | |
3405 | `coding-system-for-read' or `file-coding-system-alist', and sets the | |
bb085aed EZ |
3406 | variable `last-coding-system-used' to the coding system actually used. |
3407 | ||
3408 | In addition, this function decodes the inserted text from known formats | |
3409 | by calling `format-decode', which see. */) | |
5842a27b | 3410 | (Lisp_Object filename, Lisp_Object visit, Lisp_Object beg, Lisp_Object end, Lisp_Object replace) |
570d7624 JB |
3411 | { |
3412 | struct stat st; | |
43aac990 | 3413 | struct timespec mtime; |
f75d7a91 | 3414 | int fd; |
d311d28c | 3415 | ptrdiff_t inserted = 0; |
f75d7a91 | 3416 | ptrdiff_t how_much; |
728f8f0a | 3417 | off_t beg_offset, end_offset; |
f75d7a91 | 3418 | int unprocessed; |
d311d28c | 3419 | ptrdiff_t count = SPECPDL_INDEX (); |
6f2528d8 MR |
3420 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4, gcpro5; |
3421 | Lisp_Object handler, val, insval, orig_filename, old_undo; | |
d6a3cc15 | 3422 | Lisp_Object p; |
d311d28c | 3423 | ptrdiff_t total = 0; |
f75d7a91 | 3424 | bool not_regular = 0; |
2ef88fd4 | 3425 | int save_errno = 0; |
5976c3fe | 3426 | char read_buf[READ_BUF_SIZE]; |
6fdaa9a0 | 3427 | struct coding_system coding; |
f75d7a91 PE |
3428 | bool replace_handled = 0; |
3429 | bool set_coding_system = 0; | |
db327c7e | 3430 | Lisp_Object coding_system; |
f75d7a91 | 3431 | bool read_quit = 0; |
22513e52 SM |
3432 | /* If the undo log only contains the insertion, there's no point |
3433 | keeping it. It's typically when we first fill a file-buffer. */ | |
3434 | bool empty_undo_list_p | |
3435 | = (!NILP (visit) && NILP (BVAR (current_buffer, undo_list)) | |
3436 | && BEG == Z); | |
490ee853 | 3437 | Lisp_Object old_Vdeactivate_mark = Vdeactivate_mark; |
f75d7a91 | 3438 | bool we_locked_file = 0; |
41d48a42 | 3439 | ptrdiff_t fd_index; |
32f4334d | 3440 | |
95385625 RS |
3441 | if (current_buffer->base_buffer && ! NILP (visit)) |
3442 | error ("Cannot do file visiting in an indirect buffer"); | |
3443 | ||
4b4deea2 | 3444 | if (!NILP (BVAR (current_buffer, read_only))) |
95385625 RS |
3445 | Fbarf_if_buffer_read_only (); |
3446 | ||
32f4334d | 3447 | val = Qnil; |
d6a3cc15 | 3448 | p = Qnil; |
b1d1b865 | 3449 | orig_filename = Qnil; |
6f2528d8 | 3450 | old_undo = Qnil; |
32f4334d | 3451 | |
6f2528d8 | 3452 | GCPRO5 (filename, val, p, orig_filename, old_undo); |
570d7624 | 3453 | |
b7826503 | 3454 | CHECK_STRING (filename); |
570d7624 JB |
3455 | filename = Fexpand_file_name (filename, Qnil); |
3456 | ||
1c157f8d KH |
3457 | /* The value Qnil means that the coding system is not yet |
3458 | decided. */ | |
3459 | coding_system = Qnil; | |
3460 | ||
32f4334d RS |
3461 | /* If the file name has special constructs in it, |
3462 | call the corresponding file handler. */ | |
49307295 | 3463 | handler = Ffind_file_name_handler (filename, Qinsert_file_contents); |
32f4334d RS |
3464 | if (!NILP (handler)) |
3465 | { | |
3d0387c0 RS |
3466 | val = call6 (handler, Qinsert_file_contents, filename, |
3467 | visit, beg, end, replace); | |
d311d28c PE |
3468 | if (CONSP (val) && CONSP (XCDR (val)) |
3469 | && RANGED_INTEGERP (0, XCAR (XCDR (val)), ZV - PT)) | |
03699b14 | 3470 | inserted = XINT (XCAR (XCDR (val))); |
32f4334d RS |
3471 | goto handled; |
3472 | } | |
3473 | ||
b1d1b865 RS |
3474 | orig_filename = filename; |
3475 | filename = ENCODE_FILE (filename); | |
3476 | ||
67722112 PE |
3477 | fd = emacs_open (SSDATA (filename), O_RDONLY, 0); |
3478 | if (fd < 0) | |
570d7624 | 3479 | { |
e5e9d610 | 3480 | save_errno = errno; |
265a9e55 | 3481 | if (NILP (visit)) |
a9757f6a | 3482 | report_file_error ("Opening input file", orig_filename); |
f0941253 | 3483 | mtime = time_error_value (save_errno); |
b885bf36 | 3484 | st.st_size = -1; |
0de6b8f4 | 3485 | if (!NILP (Vcoding_system_for_read)) |
22d92d6b | 3486 | Fset (Qbuffer_file_coding_system, Vcoding_system_for_read); |
570d7624 JB |
3487 | goto notfound; |
3488 | } | |
3489 | ||
41d48a42 PE |
3490 | fd_index = SPECPDL_INDEX (); |
3491 | record_unwind_protect_int (close_file_unwind, fd); | |
3492 | ||
67722112 PE |
3493 | /* Replacement should preserve point as it preserves markers. */ |
3494 | if (!NILP (replace)) | |
3495 | record_unwind_protect (restore_point_unwind, Fpoint_marker ()); | |
3496 | ||
67722112 | 3497 | if (fstat (fd, &st) != 0) |
a9757f6a | 3498 | report_file_error ("Input file status", orig_filename); |
67722112 PE |
3499 | mtime = get_stat_mtime (&st); |
3500 | ||
be53b411 JB |
3501 | /* This code will need to be changed in order to work on named |
3502 | pipes, and it's probably just not worth it. So we should at | |
3503 | least signal an error. */ | |
99bc28f4 | 3504 | if (!S_ISREG (st.st_mode)) |
330bfe57 | 3505 | { |
d4b8687b RS |
3506 | not_regular = 1; |
3507 | ||
3508 | if (! NILP (visit)) | |
3509 | goto notfound; | |
3510 | ||
3511 | if (! NILP (replace) || ! NILP (beg) || ! NILP (end)) | |
24b1ddad KS |
3512 | xsignal2 (Qfile_error, |
3513 | build_string ("not a regular file"), orig_filename); | |
330bfe57 | 3514 | } |
be53b411 | 3515 | |
9f57b6b4 KH |
3516 | if (!NILP (visit)) |
3517 | { | |
3518 | if (!NILP (beg) || !NILP (end)) | |
3519 | error ("Attempt to visit less than an entire file"); | |
3520 | if (BEG < Z && NILP (replace)) | |
3521 | error ("Cannot do file visiting in a non-empty buffer"); | |
3522 | } | |
7fded690 JB |
3523 | |
3524 | if (!NILP (beg)) | |
b3fbb395 | 3525 | beg_offset = file_offset (beg); |
7fded690 | 3526 | else |
728f8f0a | 3527 | beg_offset = 0; |
7fded690 JB |
3528 | |
3529 | if (!NILP (end)) | |
b3fbb395 | 3530 | end_offset = file_offset (end); |
7fded690 JB |
3531 | else |
3532 | { | |
728f8f0a PE |
3533 | if (not_regular) |
3534 | end_offset = TYPE_MAXIMUM (off_t); | |
3535 | else | |
d4b8687b | 3536 | { |
728f8f0a PE |
3537 | end_offset = st.st_size; |
3538 | ||
3539 | /* A negative size can happen on a platform that allows file | |
3540 | sizes greater than the maximum off_t value. */ | |
3541 | if (end_offset < 0) | |
3542 | buffer_overflow (); | |
68c45bf0 | 3543 | |
d21dd12d GM |
3544 | /* The file size returned from stat may be zero, but data |
3545 | may be readable nonetheless, for example when this is a | |
3546 | file in the /proc filesystem. */ | |
728f8f0a PE |
3547 | if (end_offset == 0) |
3548 | end_offset = READ_BUF_SIZE; | |
d4b8687b | 3549 | } |
7fded690 JB |
3550 | } |
3551 | ||
728f8f0a PE |
3552 | /* Check now whether the buffer will become too large, |
3553 | in the likely case where the file's length is not changing. | |
3554 | This saves a lot of needless work before a buffer overflow. */ | |
3555 | if (! not_regular) | |
3556 | { | |
3557 | /* The likely offset where we will stop reading. We could read | |
3558 | more (or less), if the file grows (or shrinks) as we read it. */ | |
3559 | off_t likely_end = min (end_offset, st.st_size); | |
3560 | ||
3561 | if (beg_offset < likely_end) | |
3562 | { | |
ce2fe65a AS |
3563 | ptrdiff_t buf_bytes |
3564 | = Z_BYTE - (!NILP (replace) ? ZV_BYTE - BEGV_BYTE : 0); | |
728f8f0a PE |
3565 | ptrdiff_t buf_growth_max = BUF_BYTES_MAX - buf_bytes; |
3566 | off_t likely_growth = likely_end - beg_offset; | |
3567 | if (buf_growth_max < likely_growth) | |
3568 | buffer_overflow (); | |
3569 | } | |
3570 | } | |
3571 | ||
3572 | /* Prevent redisplay optimizations. */ | |
3573 | current_buffer->clip_changed = 1; | |
3574 | ||
356a6224 | 3575 | if (EQ (Vcoding_system_for_read, Qauto_save_coding)) |
5560aecd | 3576 | { |
75421805 | 3577 | coding_system = coding_inherit_eol_type (Qutf_8_emacs, Qunix); |
5560aecd KH |
3578 | setup_coding_system (coding_system, &coding); |
3579 | /* Ensure we set Vlast_coding_system_used. */ | |
3580 | set_coding_system = 1; | |
3581 | } | |
356a6224 | 3582 | else if (BEG < Z) |
f736ffbf KH |
3583 | { |
3584 | /* Decide the coding system to use for reading the file now | |
3585 | because we can't use an optimized method for handling | |
3586 | `coding:' tag if the current buffer is not empty. */ | |
f736ffbf | 3587 | if (!NILP (Vcoding_system_for_read)) |
db327c7e | 3588 | coding_system = Vcoding_system_for_read; |
f736ffbf KH |
3589 | else |
3590 | { | |
3591 | /* Don't try looking inside a file for a coding system | |
3592 | specification if it is not seekable. */ | |
3593 | if (! not_regular && ! NILP (Vset_auto_coding_function)) | |
3594 | { | |
3595 | /* Find a coding system specified in the heading two | |
3596 | lines or in the tailing several lines of the file. | |
3597 | We assume that the 1K-byte and 3K-byte for heading | |
003a7eaa | 3598 | and tailing respectively are sufficient for this |
f736ffbf | 3599 | purpose. */ |
d311d28c | 3600 | int nread; |
f736ffbf KH |
3601 | |
3602 | if (st.st_size <= (1024 * 4)) | |
68c45bf0 | 3603 | nread = emacs_read (fd, read_buf, 1024 * 4); |
f736ffbf KH |
3604 | else |
3605 | { | |
68c45bf0 | 3606 | nread = emacs_read (fd, read_buf, 1024); |
4c95c9a5 | 3607 | if (nread == 1024) |
f736ffbf | 3608 | { |
4c95c9a5 PE |
3609 | int ntail; |
3610 | if (lseek (fd, - (1024 * 3), SEEK_END) < 0) | |
f736ffbf | 3611 | report_file_error ("Setting file position", |
a9757f6a | 3612 | orig_filename); |
4c95c9a5 PE |
3613 | ntail = emacs_read (fd, read_buf + nread, 1024 * 3); |
3614 | nread = ntail < 0 ? ntail : nread + ntail; | |
f736ffbf KH |
3615 | } |
3616 | } | |
feb9dc27 | 3617 | |
f736ffbf | 3618 | if (nread < 0) |
4e604a5d | 3619 | report_file_error ("Read error", orig_filename); |
f736ffbf KH |
3620 | else if (nread > 0) |
3621 | { | |
f736ffbf | 3622 | struct buffer *prev = current_buffer; |
f839df0c | 3623 | Lisp_Object workbuf; |
685fc579 | 3624 | struct buffer *buf; |
f736ffbf | 3625 | |
66322887 | 3626 | record_unwind_current_buffer (); |
1d92afcd | 3627 | |
f839df0c PE |
3628 | workbuf = Fget_buffer_create (build_string (" *code-converting-work*")); |
3629 | buf = XBUFFER (workbuf); | |
685fc579 | 3630 | |
29ea8ae9 | 3631 | delete_all_overlays (buf); |
39eb03f1 PE |
3632 | bset_directory (buf, BVAR (current_buffer, directory)); |
3633 | bset_read_only (buf, Qnil); | |
3634 | bset_filename (buf, Qnil); | |
3635 | bset_undo_list (buf, Qt); | |
fd318b54 DA |
3636 | eassert (buf->overlays_before == NULL); |
3637 | eassert (buf->overlays_after == NULL); | |
efdc16c9 | 3638 | |
685fc579 RS |
3639 | set_buffer_internal (buf); |
3640 | Ferase_buffer (); | |
39eb03f1 | 3641 | bset_enable_multibyte_characters (buf, Qnil); |
685fc579 | 3642 | |
b68864e5 | 3643 | insert_1_both ((char *) read_buf, nread, nread, 0, 0, 0); |
f736ffbf | 3644 | TEMP_SET_PT_BOTH (BEG, BEG_BYTE); |
db327c7e | 3645 | coding_system = call2 (Vset_auto_coding_function, |
8f924df7 | 3646 | filename, make_number (nread)); |
f736ffbf | 3647 | set_buffer_internal (prev); |
efdc16c9 | 3648 | |
f736ffbf KH |
3649 | /* Discard the unwind protect for recovering the |
3650 | current buffer. */ | |
3651 | specpdl_ptr--; | |
3652 | ||
3653 | /* Rewind the file for the actual read done later. */ | |
e69dafad | 3654 | if (lseek (fd, 0, SEEK_SET) < 0) |
a9757f6a | 3655 | report_file_error ("Setting file position", orig_filename); |
f736ffbf KH |
3656 | } |
3657 | } | |
feb9dc27 | 3658 | |
db327c7e | 3659 | if (NILP (coding_system)) |
f736ffbf KH |
3660 | { |
3661 | /* If we have not yet decided a coding system, check | |
3662 | file-coding-system-alist. */ | |
8f924df7 | 3663 | Lisp_Object args[6]; |
f736ffbf KH |
3664 | |
3665 | args[0] = Qinsert_file_contents, args[1] = orig_filename; | |
3666 | args[2] = visit, args[3] = beg, args[4] = end, args[5] = replace; | |
8f924df7 KH |
3667 | coding_system = Ffind_operation_coding_system (6, args); |
3668 | if (CONSP (coding_system)) | |
3669 | coding_system = XCAR (coding_system); | |
f736ffbf KH |
3670 | } |
3671 | } | |
c9e82392 | 3672 | |
db327c7e KH |
3673 | if (NILP (coding_system)) |
3674 | coding_system = Qundecided; | |
3675 | else | |
3676 | CHECK_CODING_SYSTEM (coding_system); | |
c8a6d68a | 3677 | |
4b4deea2 | 3678 | if (NILP (BVAR (current_buffer, enable_multibyte_characters))) |
237a6fd2 RS |
3679 | /* We must suppress all character code conversion except for |
3680 | end-of-line conversion. */ | |
db327c7e | 3681 | coding_system = raw_text_coding_system (coding_system); |
54369368 | 3682 | |
db327c7e KH |
3683 | setup_coding_system (coding_system, &coding); |
3684 | /* Ensure we set Vlast_coding_system_used. */ | |
3685 | set_coding_system = 1; | |
f736ffbf | 3686 | } |
6cf71bf1 | 3687 | |
3d0387c0 RS |
3688 | /* If requested, replace the accessible part of the buffer |
3689 | with the file contents. Avoid replacing text at the | |
3690 | beginning or end of the buffer that matches the file contents; | |
3dbcf3f6 RS |
3691 | that preserves markers pointing to the unchanged parts. |
3692 | ||
3693 | Here we implement this feature in an optimized way | |
3694 | for the case where code conversion is NOT needed. | |
3695 | The following if-statement handles the case of conversion | |
727a0b4a RS |
3696 | in a less optimal way. |
3697 | ||
3698 | If the code conversion is "automatic" then we try using this | |
3699 | method and hope for the best. | |
3700 | But if we discover the need for conversion, we give up on this method | |
3701 | and let the following if-statement handle the replace job. */ | |
3dbcf3f6 | 3702 | if (!NILP (replace) |
f736ffbf | 3703 | && BEGV < ZV |
db327c7e KH |
3704 | && (NILP (coding_system) |
3705 | || ! CODING_REQUIRE_DECODING (&coding))) | |
3d0387c0 | 3706 | { |
ec7adf26 RS |
3707 | /* same_at_start and same_at_end count bytes, |
3708 | because file access counts bytes | |
3709 | and BEG and END count bytes. */ | |
d311d28c PE |
3710 | ptrdiff_t same_at_start = BEGV_BYTE; |
3711 | ptrdiff_t same_at_end = ZV_BYTE; | |
3712 | ptrdiff_t overlap; | |
6fdaa9a0 | 3713 | /* There is still a possibility we will find the need to do code |
f75d7a91 | 3714 | conversion. If that happens, set this variable to |
727a0b4a | 3715 | give up on handling REPLACE in the optimized way. */ |
f75d7a91 | 3716 | bool giveup_match_end = 0; |
9c28748f | 3717 | |
728f8f0a | 3718 | if (beg_offset != 0) |
4d2a0879 | 3719 | { |
728f8f0a | 3720 | if (lseek (fd, beg_offset, SEEK_SET) < 0) |
a9757f6a | 3721 | report_file_error ("Setting file position", orig_filename); |
4d2a0879 RS |
3722 | } |
3723 | ||
3d0387c0 RS |
3724 | immediate_quit = 1; |
3725 | QUIT; | |
3726 | /* Count how many chars at the start of the file | |
3727 | match the text at the beginning of the buffer. */ | |
3728 | while (1) | |
3729 | { | |
d311d28c | 3730 | int nread, bufpos; |
3d0387c0 | 3731 | |
2ef88fd4 | 3732 | nread = emacs_read (fd, read_buf, sizeof read_buf); |
3d0387c0 | 3733 | if (nread < 0) |
4e604a5d | 3734 | report_file_error ("Read error", orig_filename); |
3d0387c0 RS |
3735 | else if (nread == 0) |
3736 | break; | |
6fdaa9a0 | 3737 | |
db327c7e | 3738 | if (CODING_REQUIRE_DETECTION (&coding)) |
727a0b4a | 3739 | { |
2ef88fd4 | 3740 | coding_system = detect_coding_system ((unsigned char *) read_buf, |
5976c3fe | 3741 | nread, nread, 1, 0, |
db327c7e KH |
3742 | coding_system); |
3743 | setup_coding_system (coding_system, &coding); | |
727a0b4a RS |
3744 | } |
3745 | ||
db327c7e KH |
3746 | if (CODING_REQUIRE_DECODING (&coding)) |
3747 | /* We found that the file should be decoded somehow. | |
727a0b4a RS |
3748 | Let's give up here. */ |
3749 | { | |
3750 | giveup_match_end = 1; | |
3751 | break; | |
3752 | } | |
3753 | ||
3d0387c0 | 3754 | bufpos = 0; |
ec7adf26 | 3755 | while (bufpos < nread && same_at_start < ZV_BYTE |
2ef88fd4 | 3756 | && FETCH_BYTE (same_at_start) == read_buf[bufpos]) |
3d0387c0 RS |
3757 | same_at_start++, bufpos++; |
3758 | /* If we found a discrepancy, stop the scan. | |
8e6208c5 | 3759 | Otherwise loop around and scan the next bufferful. */ |
3d0387c0 RS |
3760 | if (bufpos != nread) |
3761 | break; | |
3762 | } | |
3763 | immediate_quit = 0; | |
3764 | /* If the file matches the buffer completely, | |
3765 | there's no need to replace anything. */ | |
2ba8e008 | 3766 | if (same_at_start - BEGV_BYTE == end_offset - beg_offset) |
3d0387c0 | 3767 | { |
68c45bf0 | 3768 | emacs_close (fd); |
b6806029 | 3769 | clear_unwind_protect (fd_index); |
9d611ffe | 3770 | |
1051b3b3 | 3771 | /* Truncate the buffer to the size of the file. */ |
7dae4502 | 3772 | del_range_1 (same_at_start, same_at_end, 0, 0); |
3d0387c0 RS |
3773 | goto handled; |
3774 | } | |
3775 | immediate_quit = 1; | |
3776 | QUIT; | |
3777 | /* Count how many chars at the end of the file | |
6fdaa9a0 KH |
3778 | match the text at the end of the buffer. But, if we have |
3779 | already found that decoding is necessary, don't waste time. */ | |
3780 | while (!giveup_match_end) | |
3d0387c0 | 3781 | { |
728f8f0a PE |
3782 | int total_read, nread, bufpos, trial; |
3783 | off_t curpos; | |
3d0387c0 RS |
3784 | |
3785 | /* At what file position are we now scanning? */ | |
728f8f0a | 3786 | curpos = end_offset - (ZV_BYTE - same_at_end); |
fc81fa9e KH |
3787 | /* If the entire file matches the buffer tail, stop the scan. */ |
3788 | if (curpos == 0) | |
3789 | break; | |
3d0387c0 | 3790 | /* How much can we scan in the next step? */ |
2ef88fd4 | 3791 | trial = min (curpos, sizeof read_buf); |
728f8f0a | 3792 | if (lseek (fd, curpos - trial, SEEK_SET) < 0) |
a9757f6a | 3793 | report_file_error ("Setting file position", orig_filename); |
3d0387c0 | 3794 | |
b02439c8 | 3795 | total_read = nread = 0; |
3d0387c0 RS |
3796 | while (total_read < trial) |
3797 | { | |
2ef88fd4 | 3798 | nread = emacs_read (fd, read_buf + total_read, trial - total_read); |
2bd2273e | 3799 | if (nread < 0) |
4e604a5d | 3800 | report_file_error ("Read error", orig_filename); |
2bd2273e GM |
3801 | else if (nread == 0) |
3802 | break; | |
3d0387c0 RS |
3803 | total_read += nread; |
3804 | } | |
efdc16c9 | 3805 | |
8e6208c5 | 3806 | /* Scan this bufferful from the end, comparing with |
3d0387c0 RS |
3807 | the Emacs buffer. */ |
3808 | bufpos = total_read; | |
efdc16c9 | 3809 | |
3d0387c0 RS |
3810 | /* Compare with same_at_start to avoid counting some buffer text |
3811 | as matching both at the file's beginning and at the end. */ | |
3812 | while (bufpos > 0 && same_at_end > same_at_start | |
2ef88fd4 | 3813 | && FETCH_BYTE (same_at_end - 1) == read_buf[bufpos - 1]) |
3d0387c0 | 3814 | same_at_end--, bufpos--; |
727a0b4a | 3815 | |
3d0387c0 | 3816 | /* If we found a discrepancy, stop the scan. |
8e6208c5 | 3817 | Otherwise loop around and scan the preceding bufferful. */ |
3d0387c0 | 3818 | if (bufpos != 0) |
727a0b4a RS |
3819 | { |
3820 | /* If this discrepancy is because of code conversion, | |
3821 | we cannot use this method; giveup and try the other. */ | |
3822 | if (same_at_end > same_at_start | |
3823 | && FETCH_BYTE (same_at_end - 1) >= 0200 | |
4b4deea2 | 3824 | && ! NILP (BVAR (current_buffer, enable_multibyte_characters)) |
c8a6d68a | 3825 | && (CODING_MAY_REQUIRE_DECODING (&coding))) |
727a0b4a RS |
3826 | giveup_match_end = 1; |
3827 | break; | |
3828 | } | |
b02439c8 GM |
3829 | |
3830 | if (nread == 0) | |
3831 | break; | |
3d0387c0 RS |
3832 | } |
3833 | immediate_quit = 0; | |
9c28748f | 3834 | |
727a0b4a RS |
3835 | if (! giveup_match_end) |
3836 | { | |
d311d28c | 3837 | ptrdiff_t temp; |
ec7adf26 | 3838 | |
727a0b4a | 3839 | /* We win! We can handle REPLACE the optimized way. */ |
9c28748f | 3840 | |
20f6783d RS |
3841 | /* Extend the start of non-matching text area to multibyte |
3842 | character boundary. */ | |
4b4deea2 | 3843 | if (! NILP (BVAR (current_buffer, enable_multibyte_characters))) |
20f6783d RS |
3844 | while (same_at_start > BEGV_BYTE |
3845 | && ! CHAR_HEAD_P (FETCH_BYTE (same_at_start))) | |
3846 | same_at_start--; | |
3847 | ||
3848 | /* Extend the end of non-matching text area to multibyte | |
71312b68 | 3849 | character boundary. */ |
4b4deea2 | 3850 | if (! NILP (BVAR (current_buffer, enable_multibyte_characters))) |
ec7adf26 RS |
3851 | while (same_at_end < ZV_BYTE |
3852 | && ! CHAR_HEAD_P (FETCH_BYTE (same_at_end))) | |
71312b68 RS |
3853 | same_at_end++; |
3854 | ||
727a0b4a | 3855 | /* Don't try to reuse the same piece of text twice. */ |
ec7adf26 | 3856 | overlap = (same_at_start - BEGV_BYTE |
728f8f0a PE |
3857 | - (same_at_end |
3858 | + (! NILP (end) ? end_offset : st.st_size) - ZV_BYTE)); | |
727a0b4a RS |
3859 | if (overlap > 0) |
3860 | same_at_end += overlap; | |
9c28748f | 3861 | |
727a0b4a | 3862 | /* Arrange to read only the nonmatching middle part of the file. */ |
728f8f0a PE |
3863 | beg_offset += same_at_start - BEGV_BYTE; |
3864 | end_offset -= ZV_BYTE - same_at_end; | |
3dbcf3f6 | 3865 | |
de1e0d91 EZ |
3866 | invalidate_buffer_caches (current_buffer, |
3867 | BYTE_TO_CHAR (same_at_start), | |
3868 | BYTE_TO_CHAR (same_at_end)); | |
ec7adf26 | 3869 | del_range_byte (same_at_start, same_at_end, 0); |
727a0b4a | 3870 | /* Insert from the file at the proper position. */ |
ec7adf26 RS |
3871 | temp = BYTE_TO_CHAR (same_at_start); |
3872 | SET_PT_BOTH (temp, same_at_start); | |
727a0b4a RS |
3873 | |
3874 | /* If display currently starts at beginning of line, | |
3875 | keep it that way. */ | |
e74aeda8 | 3876 | if (XBUFFER (XWINDOW (selected_window)->contents) == current_buffer) |
c98ff5dd | 3877 | XWINDOW (selected_window)->start_at_line_beg = !NILP (Fbolp ()); |
727a0b4a RS |
3878 | |
3879 | replace_handled = 1; | |
3880 | } | |
3dbcf3f6 RS |
3881 | } |
3882 | ||
3883 | /* If requested, replace the accessible part of the buffer | |
3884 | with the file contents. Avoid replacing text at the | |
3885 | beginning or end of the buffer that matches the file contents; | |
3886 | that preserves markers pointing to the unchanged parts. | |
3887 | ||
3888 | Here we implement this feature for the case where code conversion | |
3889 | is needed, in a simple way that needs a lot of memory. | |
3890 | The preceding if-statement handles the case of no conversion | |
3891 | in a more optimized way. */ | |
f736ffbf | 3892 | if (!NILP (replace) && ! replace_handled && BEGV < ZV) |
3dbcf3f6 | 3893 | { |
d311d28c PE |
3894 | ptrdiff_t same_at_start = BEGV_BYTE; |
3895 | ptrdiff_t same_at_end = ZV_BYTE; | |
3896 | ptrdiff_t same_at_start_charpos; | |
3897 | ptrdiff_t inserted_chars; | |
3898 | ptrdiff_t overlap; | |
3899 | ptrdiff_t bufpos; | |
db327c7e | 3900 | unsigned char *decoded; |
d311d28c PE |
3901 | ptrdiff_t temp; |
3902 | ptrdiff_t this = 0; | |
3903 | ptrdiff_t this_count = SPECPDL_INDEX (); | |
f10fe38f PE |
3904 | bool multibyte |
3905 | = ! NILP (BVAR (current_buffer, enable_multibyte_characters)); | |
5b359650 | 3906 | Lisp_Object conversion_buffer; |
83aca1cb | 3907 | struct gcpro gcpro1; |
db327c7e | 3908 | |
5b359650 | 3909 | conversion_buffer = code_conversion_save (1, multibyte); |
3dbcf3f6 RS |
3910 | |
3911 | /* First read the whole file, performing code conversion into | |
3912 | CONVERSION_BUFFER. */ | |
3913 | ||
728f8f0a | 3914 | if (lseek (fd, beg_offset, SEEK_SET) < 0) |
a9757f6a | 3915 | report_file_error ("Setting file position", orig_filename); |
727a0b4a | 3916 | |
3dbcf3f6 RS |
3917 | inserted = 0; /* Bytes put into CONVERSION_BUFFER so far. */ |
3918 | unprocessed = 0; /* Bytes not processed in previous loop. */ | |
3919 | ||
2ba48777 | 3920 | GCPRO1 (conversion_buffer); |
b41b8a7e | 3921 | while (1) |
3dbcf3f6 | 3922 | { |
b41b8a7e PE |
3923 | /* Read at most READ_BUF_SIZE bytes at a time, to allow |
3924 | quitting while reading a huge file. */ | |
3dbcf3f6 RS |
3925 | |
3926 | /* Allow quitting out of the actual I/O. */ | |
3927 | immediate_quit = 1; | |
3928 | QUIT; | |
b41b8a7e PE |
3929 | this = emacs_read (fd, read_buf + unprocessed, |
3930 | READ_BUF_SIZE - unprocessed); | |
3dbcf3f6 RS |
3931 | immediate_quit = 0; |
3932 | ||
db327c7e | 3933 | if (this <= 0) |
43aae36e | 3934 | break; |
3dbcf3f6 | 3935 | |
bf1c0f27 SM |
3936 | BUF_TEMP_SET_PT (XBUFFER (conversion_buffer), |
3937 | BUF_Z (XBUFFER (conversion_buffer))); | |
5976c3fe PE |
3938 | decode_coding_c_string (&coding, (unsigned char *) read_buf, |
3939 | unprocessed + this, conversion_buffer); | |
db327c7e KH |
3940 | unprocessed = coding.carryover_bytes; |
3941 | if (coding.carryover_bytes > 0) | |
72af86bd | 3942 | memcpy (read_buf, coding.carryover, unprocessed); |
3dbcf3f6 | 3943 | } |
2ba48777 | 3944 | UNGCPRO; |
43aae36e | 3945 | if (this < 0) |
4e604a5d | 3946 | report_file_error ("Read error", orig_filename); |
41d48a42 | 3947 | emacs_close (fd); |
a0931322 | 3948 | clear_unwind_protect (fd_index); |
3dbcf3f6 | 3949 | |
db327c7e KH |
3950 | if (unprocessed > 0) |
3951 | { | |
3952 | coding.mode |= CODING_MODE_LAST_BLOCK; | |
5976c3fe PE |
3953 | decode_coding_c_string (&coding, (unsigned char *) read_buf, |
3954 | unprocessed, conversion_buffer); | |
db327c7e KH |
3955 | coding.mode &= ~CODING_MODE_LAST_BLOCK; |
3956 | } | |
3957 | ||
50b06221 | 3958 | coding_system = CODING_ID_NAME (coding.id); |
f6a07420 | 3959 | set_coding_system = 1; |
db327c7e | 3960 | decoded = BUF_BEG_ADDR (XBUFFER (conversion_buffer)); |
50342b35 KH |
3961 | inserted = (BUF_Z_BYTE (XBUFFER (conversion_buffer)) |
3962 | - BUF_BEG_BYTE (XBUFFER (conversion_buffer))); | |
db327c7e KH |
3963 | |
3964 | /* Compare the beginning of the converted string with the buffer | |
3965 | text. */ | |
3dbcf3f6 RS |
3966 | |
3967 | bufpos = 0; | |
3968 | while (bufpos < inserted && same_at_start < same_at_end | |
db327c7e | 3969 | && FETCH_BYTE (same_at_start) == decoded[bufpos]) |
3dbcf3f6 RS |
3970 | same_at_start++, bufpos++; |
3971 | ||
db327c7e | 3972 | /* If the file matches the head of buffer completely, |
3dbcf3f6 RS |
3973 | there's no need to replace anything. */ |
3974 | ||
3975 | if (bufpos == inserted) | |
3976 | { | |
3dbcf3f6 | 3977 | /* Truncate the buffer to the size of the file. */ |
0e64479a | 3978 | if (same_at_start != same_at_end) |
de1e0d91 EZ |
3979 | { |
3980 | invalidate_buffer_caches (current_buffer, | |
3981 | BYTE_TO_CHAR (same_at_start), | |
3982 | BYTE_TO_CHAR (same_at_end)); | |
3983 | del_range_byte (same_at_start, same_at_end, 0); | |
3984 | } | |
427f5aab | 3985 | inserted = 0; |
e8553dd1 KH |
3986 | |
3987 | unbind_to (this_count, Qnil); | |
3dbcf3f6 RS |
3988 | goto handled; |
3989 | } | |
3990 | ||
db327c7e KH |
3991 | /* Extend the start of non-matching text area to the previous |
3992 | multibyte character boundary. */ | |
4b4deea2 | 3993 | if (! NILP (BVAR (current_buffer, enable_multibyte_characters))) |
20f6783d RS |
3994 | while (same_at_start > BEGV_BYTE |
3995 | && ! CHAR_HEAD_P (FETCH_BYTE (same_at_start))) | |
3996 | same_at_start--; | |
3997 | ||
3dbcf3f6 RS |
3998 | /* Scan this bufferful from the end, comparing with |
3999 | the Emacs buffer. */ | |
4000 | bufpos = inserted; | |
4001 | ||
4002 | /* Compare with same_at_start to avoid counting some buffer text | |
4003 | as matching both at the file's beginning and at the end. */ | |
4004 | while (bufpos > 0 && same_at_end > same_at_start | |
db327c7e | 4005 | && FETCH_BYTE (same_at_end - 1) == decoded[bufpos - 1]) |
3dbcf3f6 RS |
4006 | same_at_end--, bufpos--; |
4007 | ||
db327c7e KH |
4008 | /* Extend the end of non-matching text area to the next |
4009 | multibyte character boundary. */ | |
4b4deea2 | 4010 | if (! NILP (BVAR (current_buffer, enable_multibyte_characters))) |
20f6783d RS |
4011 | while (same_at_end < ZV_BYTE |
4012 | && ! CHAR_HEAD_P (FETCH_BYTE (same_at_end))) | |
4013 | same_at_end++; | |
4014 | ||
3dbcf3f6 | 4015 | /* Don't try to reuse the same piece of text twice. */ |
ec7adf26 | 4016 | overlap = same_at_start - BEGV_BYTE - (same_at_end + inserted - ZV_BYTE); |
3dbcf3f6 RS |
4017 | if (overlap > 0) |
4018 | same_at_end += overlap; | |
4019 | ||
727a0b4a RS |
4020 | /* If display currently starts at beginning of line, |
4021 | keep it that way. */ | |
e74aeda8 | 4022 | if (XBUFFER (XWINDOW (selected_window)->contents) == current_buffer) |
c98ff5dd | 4023 | XWINDOW (selected_window)->start_at_line_beg = !NILP (Fbolp ()); |
727a0b4a | 4024 | |
3dbcf3f6 RS |
4025 | /* Replace the chars that we need to replace, |
4026 | and update INSERTED to equal the number of bytes | |
db327c7e | 4027 | we are taking from the decoded string. */ |
4b70e2c9 | 4028 | inserted -= (ZV_BYTE - same_at_end) + (same_at_start - BEGV_BYTE); |
427f5aab | 4029 | |
643c73b9 | 4030 | if (same_at_end != same_at_start) |
427f5aab | 4031 | { |
de1e0d91 EZ |
4032 | invalidate_buffer_caches (current_buffer, |
4033 | BYTE_TO_CHAR (same_at_start), | |
4034 | BYTE_TO_CHAR (same_at_end)); | |
427f5aab KH |
4035 | del_range_byte (same_at_start, same_at_end, 0); |
4036 | temp = GPT; | |
22513e52 | 4037 | eassert (same_at_start == GPT_BYTE); |
427f5aab KH |
4038 | same_at_start = GPT_BYTE; |
4039 | } | |
643c73b9 RS |
4040 | else |
4041 | { | |
643c73b9 | 4042 | temp = BYTE_TO_CHAR (same_at_start); |
643c73b9 | 4043 | } |
427f5aab KH |
4044 | /* Insert from the file at the proper position. */ |
4045 | SET_PT_BOTH (temp, same_at_start); | |
50342b35 KH |
4046 | same_at_start_charpos |
4047 | = buf_bytepos_to_charpos (XBUFFER (conversion_buffer), | |
7f5d2c72 SM |
4048 | same_at_start - BEGV_BYTE |
4049 | + BUF_BEG_BYTE (XBUFFER (conversion_buffer))); | |
22513e52 | 4050 | eassert (same_at_start_charpos == temp - (BEGV - BEG)); |
50342b35 KH |
4051 | inserted_chars |
4052 | = (buf_bytepos_to_charpos (XBUFFER (conversion_buffer), | |
7f5d2c72 SM |
4053 | same_at_start + inserted - BEGV_BYTE |
4054 | + BUF_BEG_BYTE (XBUFFER (conversion_buffer))) | |
50342b35 | 4055 | - same_at_start_charpos); |
d07af40d KH |
4056 | /* This binding is to avoid ask-user-about-supersession-threat |
4057 | being called in insert_from_buffer (via in | |
4058 | prepare_to_modify_buffer). */ | |
4059 | specbind (intern ("buffer-file-name"), Qnil); | |
db327c7e | 4060 | insert_from_buffer (XBUFFER (conversion_buffer), |
50342b35 | 4061 | same_at_start_charpos, inserted_chars, 0); |
427f5aab KH |
4062 | /* Set `inserted' to the number of inserted characters. */ |
4063 | inserted = PT - temp; | |
77343e1d KH |
4064 | /* Set point before the inserted characters. */ |
4065 | SET_PT_BOTH (temp, same_at_start); | |
3dbcf3f6 | 4066 | |
db327c7e | 4067 | unbind_to (this_count, Qnil); |
3dbcf3f6 | 4068 | |
3dbcf3f6 | 4069 | goto handled; |
3d0387c0 RS |
4070 | } |
4071 | ||
d4b8687b | 4072 | if (! not_regular) |
728f8f0a | 4073 | total = end_offset - beg_offset; |
d4b8687b RS |
4074 | else |
4075 | /* For a special file, all we can do is guess. */ | |
4076 | total = READ_BUF_SIZE; | |
570d7624 | 4077 | |
8b913b57 | 4078 | if (NILP (visit) && total > 0) |
68780e2a RS |
4079 | { |
4080 | #ifdef CLASH_DETECTION | |
4b4deea2 | 4081 | if (!NILP (BVAR (current_buffer, file_truename)) |
68780e2a | 4082 | /* Make binding buffer-file-name to nil effective. */ |
4b4deea2 | 4083 | && !NILP (BVAR (current_buffer, filename)) |
68780e2a RS |
4084 | && SAVE_MODIFF >= MODIFF) |
4085 | we_locked_file = 1; | |
4086 | #endif /* CLASH_DETECTION */ | |
4087 | prepare_to_modify_buffer (GPT, GPT, NULL); | |
4088 | } | |
570d7624 | 4089 | |
13002885 | 4090 | move_gap_both (PT, PT_BYTE); |
7fded690 JB |
4091 | if (GAP_SIZE < total) |
4092 | make_gap (total - GAP_SIZE); | |
4093 | ||
728f8f0a | 4094 | if (beg_offset != 0 || !NILP (replace)) |
7fded690 | 4095 | { |
728f8f0a | 4096 | if (lseek (fd, beg_offset, SEEK_SET) < 0) |
a9757f6a | 4097 | report_file_error ("Setting file position", orig_filename); |
7fded690 JB |
4098 | } |
4099 | ||
2ef88fd4 DA |
4100 | /* In the following loop, HOW_MUCH contains the total bytes read so |
4101 | far for a regular file, and not changed for a special file. But, | |
4102 | before exiting the loop, it is set to a negative value if I/O | |
4103 | error occurs. */ | |
a1d2b64a | 4104 | how_much = 0; |
efdc16c9 | 4105 | |
6fdaa9a0 KH |
4106 | /* Total bytes inserted. */ |
4107 | inserted = 0; | |
efdc16c9 | 4108 | |
2ef88fd4 DA |
4109 | /* Here, we don't do code conversion in the loop. It is done by |
4110 | decode_coding_gap after all data are read into the buffer. */ | |
4111 | { | |
4112 | ptrdiff_t gap_size = GAP_SIZE; | |
1b978129 | 4113 | |
2ef88fd4 DA |
4114 | while (how_much < total) |
4115 | { | |
4116 | /* try is reserved in some compilers (Microsoft C) */ | |
4117 | ptrdiff_t trytry = min (total - how_much, READ_BUF_SIZE); | |
4118 | ptrdiff_t this; | |
1b978129 | 4119 | |
2ef88fd4 DA |
4120 | if (not_regular) |
4121 | { | |
4122 | Lisp_Object nbytes; | |
4123 | ||
4124 | /* Maybe make more room. */ | |
4125 | if (gap_size < trytry) | |
4126 | { | |
4127 | make_gap (trytry - gap_size); | |
4128 | gap_size = GAP_SIZE - inserted; | |
4129 | } | |
4130 | ||
4131 | /* Read from the file, capturing `quit'. When an | |
4132 | error occurs, end the loop, and arrange for a quit | |
4133 | to be signaled after decoding the text we read. */ | |
4134 | nbytes = internal_condition_case_1 | |
4135 | (read_non_regular, | |
1396ac86 | 4136 | make_save_int_int_int (fd, inserted, trytry), |
2ef88fd4 DA |
4137 | Qerror, read_non_regular_quit); |
4138 | ||
4139 | if (NILP (nbytes)) | |
4140 | { | |
4141 | read_quit = 1; | |
4142 | break; | |
4143 | } | |
4144 | ||
4145 | this = XINT (nbytes); | |
4146 | } | |
4147 | else | |
4148 | { | |
4149 | /* Allow quitting out of the actual I/O. We don't make text | |
4150 | part of the buffer until all the reading is done, so a C-g | |
4151 | here doesn't do any harm. */ | |
4152 | immediate_quit = 1; | |
4153 | QUIT; | |
4154 | this = emacs_read (fd, | |
4155 | ((char *) BEG_ADDR + PT_BYTE - BEG_BYTE | |
4156 | + inserted), | |
4157 | trytry); | |
4158 | immediate_quit = 0; | |
4159 | } | |
4160 | ||
4161 | if (this <= 0) | |
4162 | { | |
4163 | how_much = this; | |
4164 | break; | |
4165 | } | |
4166 | ||
4167 | gap_size -= this; | |
4168 | ||
4169 | /* For a regular file, where TOTAL is the real size, | |
4170 | count HOW_MUCH to compare with it. | |
4171 | For a special file, where TOTAL is just a buffer size, | |
4172 | so don't bother counting in HOW_MUCH. | |
4173 | (INSERTED is where we count the number of characters inserted.) */ | |
4174 | if (! not_regular) | |
4175 | how_much += this; | |
4176 | inserted += this; | |
4177 | } | |
4178 | } | |
1b978129 | 4179 | |
e07469fa DA |
4180 | /* Now we have either read all the file data into the gap, |
4181 | or stop reading on I/O error or quit. If nothing was | |
4182 | read, undo marking the buffer modified. */ | |
68780e2a RS |
4183 | |
4184 | if (inserted == 0) | |
4185 | { | |
6840d350 | 4186 | #ifdef CLASH_DETECTION |
68780e2a | 4187 | if (we_locked_file) |
4b4deea2 | 4188 | unlock_file (BVAR (current_buffer, file_truename)); |
6840d350 | 4189 | #endif |
68780e2a RS |
4190 | Vdeactivate_mark = old_Vdeactivate_mark; |
4191 | } | |
83c1cf6d RS |
4192 | else |
4193 | Vdeactivate_mark = Qt; | |
68780e2a | 4194 | |
68c45bf0 | 4195 | emacs_close (fd); |
a0931322 | 4196 | clear_unwind_protect (fd_index); |
6fdaa9a0 | 4197 | |
2ef88fd4 | 4198 | if (how_much < 0) |
4e604a5d | 4199 | report_file_error ("Read error", orig_filename); |
2ef88fd4 DA |
4200 | |
4201 | /* Make the text read part of the buffer. */ | |
4202 | GAP_SIZE -= inserted; | |
4203 | GPT += inserted; | |
4204 | GPT_BYTE += inserted; | |
4205 | ZV += inserted; | |
4206 | ZV_BYTE += inserted; | |
4207 | Z += inserted; | |
4208 | Z_BYTE += inserted; | |
4209 | ||
4210 | if (GAP_SIZE > 0) | |
4211 | /* Put an anchor to ensure multi-byte form ends at gap. */ | |
4212 | *GPT_ADDR = 0; | |
4213 | ||
f8569325 DL |
4214 | notfound: |
4215 | ||
db327c7e | 4216 | if (NILP (coding_system)) |
c8a6d68a | 4217 | { |
2df42e09 | 4218 | /* The coding system is not yet decided. Decide it by an |
dfe35e7b RS |
4219 | optimized method for handling `coding:' tag. |
4220 | ||
4221 | Note that we can get here only if the buffer was empty | |
4222 | before the insertion. */ | |
f736ffbf | 4223 | |
2df42e09 | 4224 | if (!NILP (Vcoding_system_for_read)) |
db327c7e | 4225 | coding_system = Vcoding_system_for_read; |
2df42e09 KH |
4226 | else |
4227 | { | |
98a7d268 KH |
4228 | /* Since we are sure that the current buffer was empty |
4229 | before the insertion, we can toggle | |
4230 | enable-multibyte-characters directly here without taking | |
9a7f80aa KH |
4231 | care of marker adjustment. By this way, we can run Lisp |
4232 | program safely before decoding the inserted text. */ | |
98a7d268 | 4233 | Lisp_Object unwind_data; |
d311d28c | 4234 | ptrdiff_t count1 = SPECPDL_INDEX (); |
2df42e09 | 4235 | |
4b4deea2 TT |
4236 | unwind_data = Fcons (BVAR (current_buffer, enable_multibyte_characters), |
4237 | Fcons (BVAR (current_buffer, undo_list), | |
98a7d268 | 4238 | Fcurrent_buffer ())); |
39eb03f1 PE |
4239 | bset_enable_multibyte_characters (current_buffer, Qnil); |
4240 | bset_undo_list (current_buffer, Qt); | |
98a7d268 KH |
4241 | record_unwind_protect (decide_coding_unwind, unwind_data); |
4242 | ||
4243 | if (inserted > 0 && ! NILP (Vset_auto_coding_function)) | |
4244 | { | |
db327c7e | 4245 | coding_system = call2 (Vset_auto_coding_function, |
8f924df7 | 4246 | filename, make_number (inserted)); |
2df42e09 | 4247 | } |
f736ffbf | 4248 | |
db327c7e | 4249 | if (NILP (coding_system)) |
2df42e09 KH |
4250 | { |
4251 | /* If the coding system is not yet decided, check | |
4252 | file-coding-system-alist. */ | |
8f924df7 | 4253 | Lisp_Object args[6]; |
f736ffbf | 4254 | |
2df42e09 KH |
4255 | args[0] = Qinsert_file_contents, args[1] = orig_filename; |
4256 | args[2] = visit, args[3] = beg, args[4] = end, args[5] = Qnil; | |
8f924df7 KH |
4257 | coding_system = Ffind_operation_coding_system (6, args); |
4258 | if (CONSP (coding_system)) | |
4259 | coding_system = XCAR (coding_system); | |
f736ffbf | 4260 | } |
f839df0c | 4261 | unbind_to (count1, Qnil); |
98a7d268 | 4262 | inserted = Z_BYTE - BEG_BYTE; |
2df42e09 | 4263 | } |
f736ffbf | 4264 | |
db327c7e KH |
4265 | if (NILP (coding_system)) |
4266 | coding_system = Qundecided; | |
4267 | else | |
4268 | CHECK_CODING_SYSTEM (coding_system); | |
f736ffbf | 4269 | |
4b4deea2 | 4270 | if (NILP (BVAR (current_buffer, enable_multibyte_characters))) |
237a6fd2 | 4271 | /* We must suppress all character code conversion except for |
2df42e09 | 4272 | end-of-line conversion. */ |
db327c7e | 4273 | coding_system = raw_text_coding_system (coding_system); |
db327c7e KH |
4274 | setup_coding_system (coding_system, &coding); |
4275 | /* Ensure we set Vlast_coding_system_used. */ | |
4276 | set_coding_system = 1; | |
2df42e09 | 4277 | } |
f736ffbf | 4278 | |
db327c7e | 4279 | if (!NILP (visit)) |
8c3b9441 | 4280 | { |
db327c7e | 4281 | /* When we visit a file by raw-text, we change the buffer to |
9a7f80aa | 4282 | unibyte. */ |
db327c7e KH |
4283 | if (CODING_FOR_UNIBYTE (&coding) |
4284 | /* Can't do this if part of the buffer might be preserved. */ | |
4285 | && NILP (replace)) | |
4286 | /* Visiting a file with these coding system makes the buffer | |
4287 | unibyte. */ | |
39eb03f1 | 4288 | bset_enable_multibyte_characters (current_buffer, Qnil); |
8c3b9441 KH |
4289 | } |
4290 | ||
4b4deea2 | 4291 | coding.dst_multibyte = ! NILP (BVAR (current_buffer, enable_multibyte_characters)); |
5b359650 | 4292 | if (CODING_MAY_REQUIRE_DECODING (&coding) |
1c157f8d | 4293 | && (inserted > 0 || CODING_REQUIRE_FLUSHING (&coding))) |
2df42e09 | 4294 | { |
db327c7e KH |
4295 | move_gap_both (PT, PT_BYTE); |
4296 | GAP_SIZE += inserted; | |
4297 | ZV_BYTE -= inserted; | |
4298 | Z_BYTE -= inserted; | |
4299 | ZV -= inserted; | |
4300 | Z -= inserted; | |
4301 | decode_coding_gap (&coding, inserted, inserted); | |
4302 | inserted = coding.produced_char; | |
5b359650 | 4303 | coding_system = CODING_ID_NAME (coding.id); |
2df42e09 | 4304 | } |
db327c7e KH |
4305 | else if (inserted > 0) |
4306 | adjust_after_insert (PT, PT_BYTE, PT + inserted, PT_BYTE + inserted, | |
4307 | inserted); | |
570d7624 | 4308 | |
0068070e SM |
4309 | /* Call after-change hooks for the inserted text, aside from the case |
4310 | of normal visiting (not with REPLACE), which is done in a new buffer | |
4311 | "before" the buffer is changed. */ | |
4312 | if (inserted > 0 && total > 0 | |
4313 | && (NILP (visit) || !NILP (replace))) | |
4314 | { | |
4315 | signal_after_change (PT, 0, inserted); | |
4316 | update_compositions (PT, PT, CHECK_BORDER); | |
4317 | } | |
4318 | ||
cf6d2357 RS |
4319 | /* Now INSERTED is measured in characters. */ |
4320 | ||
32f4334d | 4321 | handled: |
570d7624 | 4322 | |
265a9e55 | 4323 | if (!NILP (visit)) |
570d7624 | 4324 | { |
22513e52 | 4325 | if (empty_undo_list_p) |
39eb03f1 | 4326 | bset_undo_list (current_buffer, Qnil); |
62bcf009 | 4327 | |
a7e82472 RS |
4328 | if (NILP (handler)) |
4329 | { | |
dbeed9a6 | 4330 | current_buffer->modtime = mtime; |
58b963f7 | 4331 | current_buffer->modtime_size = st.st_size; |
39eb03f1 | 4332 | bset_filename (current_buffer, orig_filename); |
a7e82472 | 4333 | } |
62bcf009 | 4334 | |
95385625 | 4335 | SAVE_MODIFF = MODIFF; |
0b5397c2 | 4336 | BUF_AUTOSAVE_MODIFF (current_buffer) = MODIFF; |
4b4deea2 | 4337 | XSETFASTINT (BVAR (current_buffer, save_length), Z - BEG); |
570d7624 | 4338 | #ifdef CLASH_DETECTION |
32f4334d RS |
4339 | if (NILP (handler)) |
4340 | { | |
4b4deea2 TT |
4341 | if (!NILP (BVAR (current_buffer, file_truename))) |
4342 | unlock_file (BVAR (current_buffer, file_truename)); | |
32f4334d RS |
4343 | unlock_file (filename); |
4344 | } | |
570d7624 | 4345 | #endif /* CLASH_DETECTION */ |
330bfe57 | 4346 | if (not_regular) |
24b1ddad KS |
4347 | xsignal2 (Qfile_error, |
4348 | build_string ("not a regular file"), orig_filename); | |
570d7624 JB |
4349 | } |
4350 | ||
b6426b03 | 4351 | if (set_coding_system) |
8f924df7 | 4352 | Vlast_coding_system_used = coding_system; |
b6426b03 | 4353 | |
2080470e | 4354 | if (! NILP (Ffboundp (Qafter_insert_file_set_coding))) |
b6426b03 | 4355 | { |
37a3c774 KH |
4356 | insval = call2 (Qafter_insert_file_set_coding, make_number (inserted), |
4357 | visit); | |
b6426b03 KH |
4358 | if (! NILP (insval)) |
4359 | { | |
d311d28c PE |
4360 | if (! RANGED_INTEGERP (0, insval, ZV - PT)) |
4361 | wrong_type_argument (intern ("inserted-chars"), insval); | |
b6426b03 KH |
4362 | inserted = XFASTINT (insval); |
4363 | } | |
4364 | } | |
4365 | ||
6420e80c | 4366 | /* Decode file format. */ |
c8a6d68a | 4367 | if (inserted > 0) |
0d420e88 | 4368 | { |
6420e80c | 4369 | /* Don't run point motion or modification hooks when decoding. */ |
d311d28c PE |
4370 | ptrdiff_t count1 = SPECPDL_INDEX (); |
4371 | ptrdiff_t old_inserted = inserted; | |
6f2528d8 MR |
4372 | specbind (Qinhibit_point_motion_hooks, Qt); |
4373 | specbind (Qinhibit_modification_hooks, Qt); | |
4374 | ||
6420e80c | 4375 | /* Save old undo list and don't record undo for decoding. */ |
4b4deea2 | 4376 | old_undo = BVAR (current_buffer, undo_list); |
39eb03f1 | 4377 | bset_undo_list (current_buffer, Qt); |
efdc16c9 | 4378 | |
6f2528d8 | 4379 | if (NILP (replace)) |
ed8e506f | 4380 | { |
6f2528d8 MR |
4381 | insval = call3 (Qformat_decode, |
4382 | Qnil, make_number (inserted), visit); | |
d311d28c PE |
4383 | if (! RANGED_INTEGERP (0, insval, ZV - PT)) |
4384 | wrong_type_argument (intern ("inserted-chars"), insval); | |
6f2528d8 MR |
4385 | inserted = XFASTINT (insval); |
4386 | } | |
4387 | else | |
4388 | { | |
4389 | /* If REPLACE is non-nil and we succeeded in not replacing the | |
6420e80c AS |
4390 | beginning or end of the buffer text with the file's contents, |
4391 | call format-decode with `point' positioned at the beginning | |
fa463103 | 4392 | of the buffer and `inserted' equaling the number of |
6420e80c AS |
4393 | characters in the buffer. Otherwise, format-decode might |
4394 | fail to correctly analyze the beginning or end of the buffer. | |
4395 | Hence we temporarily save `point' and `inserted' here and | |
4396 | restore `point' iff format-decode did not insert or delete | |
4397 | any text. Otherwise we leave `point' at point-min. */ | |
d311d28c PE |
4398 | ptrdiff_t opoint = PT; |
4399 | ptrdiff_t opoint_byte = PT_BYTE; | |
4400 | ptrdiff_t oinserted = ZV - BEGV; | |
4401 | EMACS_INT ochars_modiff = CHARS_MODIFF; | |
1f163f28 MA |
4402 | |
4403 | TEMP_SET_PT_BOTH (BEGV, BEGV_BYTE); | |
6f2528d8 MR |
4404 | insval = call3 (Qformat_decode, |
4405 | Qnil, make_number (oinserted), visit); | |
d311d28c PE |
4406 | if (! RANGED_INTEGERP (0, insval, ZV - PT)) |
4407 | wrong_type_argument (intern ("inserted-chars"), insval); | |
cac4219c MR |
4408 | if (ochars_modiff == CHARS_MODIFF) |
4409 | /* format_decode didn't modify buffer's characters => move | |
4410 | point back to position before inserted text and leave | |
6420e80c | 4411 | value of inserted alone. */ |
6f2528d8 | 4412 | SET_PT_BOTH (opoint, opoint_byte); |
cac4219c MR |
4413 | else |
4414 | /* format_decode modified buffer's characters => consider | |
6420e80c | 4415 | entire buffer changed and leave point at point-min. */ |
cac4219c | 4416 | inserted = XFASTINT (insval); |
ed8e506f | 4417 | } |
efdc16c9 | 4418 | |
6f2528d8 | 4419 | /* For consistency with format-decode call these now iff inserted > 0 |
6420e80c | 4420 | (martin 2007-06-28). */ |
6f2528d8 MR |
4421 | p = Vafter_insert_file_functions; |
4422 | while (CONSP (p)) | |
4423 | { | |
4424 | if (NILP (replace)) | |
4425 | { | |
4426 | insval = call1 (XCAR (p), make_number (inserted)); | |
4427 | if (!NILP (insval)) | |
4428 | { | |
d311d28c PE |
4429 | if (! RANGED_INTEGERP (0, insval, ZV - PT)) |
4430 | wrong_type_argument (intern ("inserted-chars"), insval); | |
6f2528d8 MR |
4431 | inserted = XFASTINT (insval); |
4432 | } | |
4433 | } | |
4434 | else | |
4435 | { | |
6420e80c AS |
4436 | /* For the rationale of this see the comment on |
4437 | format-decode above. */ | |
d311d28c PE |
4438 | ptrdiff_t opoint = PT; |
4439 | ptrdiff_t opoint_byte = PT_BYTE; | |
4440 | ptrdiff_t oinserted = ZV - BEGV; | |
4441 | EMACS_INT ochars_modiff = CHARS_MODIFF; | |
1f163f28 | 4442 | |
6f2528d8 MR |
4443 | TEMP_SET_PT_BOTH (BEGV, BEGV_BYTE); |
4444 | insval = call1 (XCAR (p), make_number (oinserted)); | |
4445 | if (!NILP (insval)) | |
4446 | { | |
d311d28c PE |
4447 | if (! RANGED_INTEGERP (0, insval, ZV - PT)) |
4448 | wrong_type_argument (intern ("inserted-chars"), insval); | |
cac4219c MR |
4449 | if (ochars_modiff == CHARS_MODIFF) |
4450 | /* after_insert_file_functions didn't modify | |
4451 | buffer's characters => move point back to | |
4452 | position before inserted text and leave value of | |
6420e80c | 4453 | inserted alone. */ |
6f2528d8 | 4454 | SET_PT_BOTH (opoint, opoint_byte); |
cac4219c MR |
4455 | else |
4456 | /* after_insert_file_functions did modify buffer's | |
4457 | characters => consider entire buffer changed and | |
6420e80c | 4458 | leave point at point-min. */ |
cac4219c | 4459 | inserted = XFASTINT (insval); |
6f2528d8 MR |
4460 | } |
4461 | } | |
4462 | ||
4463 | QUIT; | |
4464 | p = XCDR (p); | |
ed8e506f | 4465 | } |
efdc16c9 | 4466 | |
22513e52 | 4467 | if (!empty_undo_list_p) |
6f2528d8 | 4468 | { |
39eb03f1 | 4469 | bset_undo_list (current_buffer, old_undo); |
6420e80c | 4470 | if (CONSP (old_undo) && inserted != old_inserted) |
6f2528d8 | 4471 | { |
6420e80c AS |
4472 | /* Adjust the last undo record for the size change during |
4473 | the format conversion. */ | |
6f2528d8 | 4474 | Lisp_Object tem = XCAR (old_undo); |
6420e80c AS |
4475 | if (CONSP (tem) && INTEGERP (XCAR (tem)) |
4476 | && INTEGERP (XCDR (tem)) | |
4477 | && XFASTINT (XCDR (tem)) == PT + old_inserted) | |
4478 | XSETCDR (tem, make_number (PT + inserted)); | |
6f2528d8 MR |
4479 | } |
4480 | } | |
6f2528d8 | 4481 | else |
1bc99c9c | 4482 | /* If undo_list was Qt before, keep it that way. |
6420e80c | 4483 | Otherwise start with an empty undo_list. */ |
39eb03f1 | 4484 | bset_undo_list (current_buffer, EQ (old_undo, Qt) ? Qt : Qnil); |
efdc16c9 | 4485 | |
f839df0c | 4486 | unbind_to (count1, Qnil); |
0d420e88 BG |
4487 | } |
4488 | ||
f8569325 | 4489 | if (!NILP (visit) |
43aac990 | 4490 | && current_buffer->modtime.tv_nsec == NONEXISTENT_MODTIME_NSECS) |
f8569325 DL |
4491 | { |
4492 | /* If visiting nonexistent file, return nil. */ | |
a9757f6a | 4493 | report_file_errno ("Opening input file", orig_filename, save_errno); |
d6a3cc15 RS |
4494 | } |
4495 | ||
addccbd0 EZ |
4496 | /* We made a lot of deletions and insertions above, so invalidate |
4497 | the newline cache for the entire region of the inserted | |
4498 | characters. */ | |
c10e9ece EZ |
4499 | if (current_buffer->base_buffer && current_buffer->base_buffer->newline_cache) |
4500 | invalidate_region_cache (current_buffer->base_buffer, | |
4501 | current_buffer->base_buffer->newline_cache, | |
4502 | PT - BEG, Z - PT - inserted); | |
4503 | else if (current_buffer->newline_cache) | |
addccbd0 EZ |
4504 | invalidate_region_cache (current_buffer, |
4505 | current_buffer->newline_cache, | |
4506 | PT - BEG, Z - PT - inserted); | |
4507 | ||
1b978129 GM |
4508 | if (read_quit) |
4509 | Fsignal (Qquit, Qnil); | |
4510 | ||
2ef88fd4 | 4511 | /* Retval needs to be dealt with in all cases consistently. */ |
a1d2b64a | 4512 | if (NILP (val)) |
e07469fa | 4513 | val = list2 (orig_filename, make_number (inserted)); |
a1d2b64a RS |
4514 | |
4515 | RETURN_UNGCPRO (unbind_to (count, val)); | |
570d7624 | 4516 | } |
7fded690 | 4517 | \f |
f57e2426 | 4518 | static Lisp_Object build_annotations (Lisp_Object, Lisp_Object); |
d6a3cc15 | 4519 | |
27e498e6 | 4520 | static void |
971de7fb | 4521 | build_annotations_unwind (Lisp_Object arg) |
6fc6f94b | 4522 | { |
67fbc0cb | 4523 | Vwrite_region_annotation_buffers = arg; |
6fc6f94b RS |
4524 | } |
4525 | ||
7c82a4a9 SM |
4526 | /* Decide the coding-system to encode the data with. */ |
4527 | ||
9dbda100 GM |
4528 | DEFUN ("choose-write-coding-system", Fchoose_write_coding_system, |
4529 | Schoose_write_coding_system, 3, 6, 0, | |
4530 | doc: /* Choose the coding system for writing a file. | |
4531 | Arguments are as for `write-region'. | |
4532 | This function is for internal use only. It may prompt the user. */ ) | |
4533 | (Lisp_Object start, Lisp_Object end, Lisp_Object filename, | |
4534 | Lisp_Object append, Lisp_Object visit, Lisp_Object lockname) | |
7c82a4a9 SM |
4535 | { |
4536 | Lisp_Object val; | |
75421805 | 4537 | Lisp_Object eol_parent = Qnil; |
7c82a4a9 | 4538 | |
9dbda100 GM |
4539 | /* Mimic write-region behavior. */ |
4540 | if (NILP (start)) | |
4541 | { | |
4542 | XSETFASTINT (start, BEGV); | |
4543 | XSETFASTINT (end, ZV); | |
4544 | } | |
4545 | ||
6b61353c | 4546 | if (auto_saving |
4b4deea2 TT |
4547 | && NILP (Fstring_equal (BVAR (current_buffer, filename), |
4548 | BVAR (current_buffer, auto_save_file_name)))) | |
75421805 KH |
4549 | { |
4550 | val = Qutf_8_emacs; | |
4551 | eol_parent = Qunix; | |
4552 | } | |
7c82a4a9 | 4553 | else if (!NILP (Vcoding_system_for_write)) |
42b01e1e KH |
4554 | { |
4555 | val = Vcoding_system_for_write; | |
4556 | if (coding_system_require_warning | |
4557 | && !NILP (Ffboundp (Vselect_safe_coding_system_function))) | |
4558 | /* Confirm that VAL can surely encode the current region. */ | |
4559 | val = call5 (Vselect_safe_coding_system_function, | |
6c6f1994 | 4560 | start, end, list2 (Qt, val), |
42b01e1e KH |
4561 | Qnil, filename); |
4562 | } | |
7c82a4a9 SM |
4563 | else |
4564 | { | |
4565 | /* If the variable `buffer-file-coding-system' is set locally, | |
4566 | it means that the file was read with some kind of code | |
4567 | conversion or the variable is explicitly set by users. We | |
4568 | had better write it out with the same coding system even if | |
4569 | `enable-multibyte-characters' is nil. | |
4570 | ||
4571 | If it is not set locally, we anyway have to convert EOL | |
4572 | format if the default value of `buffer-file-coding-system' | |
4573 | tells that it is not Unix-like (LF only) format. */ | |
f75d7a91 PE |
4574 | bool using_default_coding = 0; |
4575 | bool force_raw_text = 0; | |
7c82a4a9 | 4576 | |
4b4deea2 | 4577 | val = BVAR (current_buffer, buffer_file_coding_system); |
7c82a4a9 SM |
4578 | if (NILP (val) |
4579 | || NILP (Flocal_variable_p (Qbuffer_file_coding_system, Qnil))) | |
4580 | { | |
4581 | val = Qnil; | |
4b4deea2 | 4582 | if (NILP (BVAR (current_buffer, enable_multibyte_characters))) |
7c82a4a9 SM |
4583 | force_raw_text = 1; |
4584 | } | |
efdc16c9 | 4585 | |
7c82a4a9 SM |
4586 | if (NILP (val)) |
4587 | { | |
4588 | /* Check file-coding-system-alist. */ | |
4589 | Lisp_Object args[7], coding_systems; | |
4590 | ||
4591 | args[0] = Qwrite_region; args[1] = start; args[2] = end; | |
4592 | args[3] = filename; args[4] = append; args[5] = visit; | |
4593 | args[6] = lockname; | |
4594 | coding_systems = Ffind_operation_coding_system (7, args); | |
4595 | if (CONSP (coding_systems) && !NILP (XCDR (coding_systems))) | |
4596 | val = XCDR (coding_systems); | |
4597 | } | |
4598 | ||
c934586d | 4599 | if (NILP (val)) |
7c82a4a9 SM |
4600 | { |
4601 | /* If we still have not decided a coding system, use the | |
4602 | default value of buffer-file-coding-system. */ | |
4b4deea2 | 4603 | val = BVAR (current_buffer, buffer_file_coding_system); |
7c82a4a9 SM |
4604 | using_default_coding = 1; |
4605 | } | |
efdc16c9 | 4606 | |
db327c7e KH |
4607 | if (! NILP (val) && ! force_raw_text) |
4608 | { | |
4609 | Lisp_Object spec, attrs; | |
4610 | ||
4611 | CHECK_CODING_SYSTEM_GET_SPEC (val, spec); | |
4612 | attrs = AREF (spec, 0); | |
4613 | if (EQ (CODING_ATTR_TYPE (attrs), Qraw_text)) | |
4614 | force_raw_text = 1; | |
4615 | } | |
4616 | ||
7c82a4a9 SM |
4617 | if (!force_raw_text |
4618 | && !NILP (Ffboundp (Vselect_safe_coding_system_function))) | |
4619 | /* Confirm that VAL can surely encode the current region. */ | |
905a4276 PJ |
4620 | val = call5 (Vselect_safe_coding_system_function, |
4621 | start, end, val, Qnil, filename); | |
7c82a4a9 | 4622 | |
db327c7e KH |
4623 | /* If the decided coding-system doesn't specify end-of-line |
4624 | format, we use that of | |
4625 | `default-buffer-file-coding-system'. */ | |
c934586d | 4626 | if (! using_default_coding |
4b4deea2 | 4627 | && ! NILP (BVAR (&buffer_defaults, buffer_file_coding_system))) |
db327c7e | 4628 | val = (coding_inherit_eol_type |
4b4deea2 | 4629 | (val, BVAR (&buffer_defaults, buffer_file_coding_system))); |
7c82a4a9 | 4630 | |
db327c7e KH |
4631 | /* If we decide not to encode text, use `raw-text' or one of its |
4632 | subsidiaries. */ | |
7c82a4a9 | 4633 | if (force_raw_text) |
db327c7e | 4634 | val = raw_text_coding_system (val); |
7c82a4a9 SM |
4635 | } |
4636 | ||
75421805 | 4637 | val = coding_inherit_eol_type (val, eol_parent); |
c934586d | 4638 | return val; |
7c82a4a9 SM |
4639 | } |
4640 | ||
a7ca3326 | 4641 | DEFUN ("write-region", Fwrite_region, Swrite_region, 3, 7, |
8c1a1077 PJ |
4642 | "r\nFWrite region to file: \ni\ni\ni\np", |
4643 | doc: /* Write current region into specified file. | |
c2efea25 RS |
4644 | When called from a program, requires three arguments: |
4645 | START, END and FILENAME. START and END are normally buffer positions | |
4646 | specifying the part of the buffer to write. | |
4647 | If START is nil, that means to use the entire buffer contents. | |
4648 | If START is a string, then output that string to the file | |
4649 | instead of any buffer contents; END is ignored. | |
4650 | ||
8c1a1077 | 4651 | Optional fourth argument APPEND if non-nil means |
b3fbb395 | 4652 | append to existing file contents (if any). If it is a number, |
8c1a1077 | 4653 | seek to that offset in the file before writing. |
36e50520 | 4654 | Optional fifth argument VISIT, if t or a string, means |
8c1a1077 PJ |
4655 | set the last-save-file-modtime of buffer to this file's modtime |
4656 | and mark buffer not modified. | |
4657 | If VISIT is a string, it is a second file name; | |
4658 | the output goes to FILENAME, but the buffer is marked as visiting VISIT. | |
4659 | VISIT is also the file name to lock and unlock for clash detection. | |
4660 | If VISIT is neither t nor nil nor a string, | |
5f4e6aa9 | 4661 | that means do not display the \"Wrote file\" message. |
8c1a1077 PJ |
4662 | The optional sixth arg LOCKNAME, if non-nil, specifies the name to |
4663 | use for locking and unlocking, overriding FILENAME and VISIT. | |
4664 | The optional seventh arg MUSTBENEW, if non-nil, insists on a check | |
4665 | for an existing file with the same name. If MUSTBENEW is `excl', | |
4666 | that means to get an error if the file already exists; never overwrite. | |
4667 | If MUSTBENEW is neither nil nor `excl', that means ask for | |
4668 | confirmation before overwriting, but do go ahead and overwrite the file | |
4669 | if the user confirms. | |
8c1a1077 PJ |
4670 | |
4671 | This does code conversion according to the value of | |
4672 | `coding-system-for-write', `buffer-file-coding-system', or | |
4673 | `file-coding-system-alist', and sets the variable | |
aacd8ba1 GM |
4674 | `last-coding-system-used' to the coding system actually used. |
4675 | ||
4676 | This calls `write-region-annotate-functions' at the start, and | |
4677 | `write-region-post-annotation-function' at the end. */) | |
94fcd171 PE |
4678 | (Lisp_Object start, Lisp_Object end, Lisp_Object filename, Lisp_Object append, |
4679 | Lisp_Object visit, Lisp_Object lockname, Lisp_Object mustbenew) | |
4680 | { | |
4681 | return write_region (start, end, filename, append, visit, lockname, mustbenew, | |
4682 | -1); | |
4683 | } | |
4684 | ||
4685 | /* Like Fwrite_region, except that if DESC is nonnegative, it is a file | |
4686 | descriptor for FILENAME, so do not open or close FILENAME. */ | |
4687 | ||
4688 | Lisp_Object | |
4689 | write_region (Lisp_Object start, Lisp_Object end, Lisp_Object filename, | |
4690 | Lisp_Object append, Lisp_Object visit, Lisp_Object lockname, | |
4691 | Lisp_Object mustbenew, int desc) | |
570d7624 | 4692 | { |
3a955a1f PE |
4693 | int open_flags; |
4694 | int mode; | |
4695 | off_t offset IF_LINT (= 0); | |
94fcd171 | 4696 | bool open_and_close_file = desc < 0; |
f75d7a91 | 4697 | bool ok; |
6bbd7a29 | 4698 | int save_errno = 0; |
5976c3fe | 4699 | const char *fn; |
570d7624 | 4700 | struct stat st; |
43aac990 | 4701 | struct timespec modtime; |
d311d28c | 4702 | ptrdiff_t count = SPECPDL_INDEX (); |
94fcd171 | 4703 | ptrdiff_t count1 IF_LINT (= 0); |
3eac9910 | 4704 | Lisp_Object handler; |
4ad827c5 | 4705 | Lisp_Object visit_file; |
65b7d3e7 | 4706 | Lisp_Object annotations; |
b1d1b865 | 4707 | Lisp_Object encoded_filename; |
f75d7a91 PE |
4708 | bool visiting = (EQ (visit, Qt) || STRINGP (visit)); |
4709 | bool quietly = !NILP (visit); | |
94fcd171 | 4710 | bool file_locked = 0; |
7204a979 | 4711 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4, gcpro5; |
6fc6f94b | 4712 | struct buffer *given_buffer; |
6fdaa9a0 | 4713 | struct coding_system coding; |
570d7624 | 4714 | |
d3a67486 | 4715 | if (current_buffer->base_buffer && visiting) |
95385625 RS |
4716 | error ("Cannot do file visiting in an indirect buffer"); |
4717 | ||
561cb8e1 | 4718 | if (!NILP (start) && !STRINGP (start)) |
570d7624 JB |
4719 | validate_region (&start, &end); |
4720 | ||
95c1c901 | 4721 | visit_file = Qnil; |
59fac292 | 4722 | GCPRO5 (start, filename, visit, visit_file, lockname); |
b56567b5 | 4723 | |
570d7624 | 4724 | filename = Fexpand_file_name (filename, Qnil); |
de1d0127 | 4725 | |
236a12f2 | 4726 | if (!NILP (mustbenew) && !EQ (mustbenew, Qexcl)) |
a560b856 | 4727 | barf_or_query_if_file_exists (filename, false, "overwrite", true, true); |
de1d0127 | 4728 | |
561cb8e1 | 4729 | if (STRINGP (visit)) |
e5176bae | 4730 | visit_file = Fexpand_file_name (visit, Qnil); |
4ad827c5 RS |
4731 | else |
4732 | visit_file = filename; | |
4733 | ||
7204a979 RS |
4734 | if (NILP (lockname)) |
4735 | lockname = visit_file; | |
4736 | ||
65b7d3e7 RS |
4737 | annotations = Qnil; |
4738 | ||
32f4334d RS |
4739 | /* If the file name has special constructs in it, |
4740 | call the corresponding file handler. */ | |
49307295 | 4741 | handler = Ffind_file_name_handler (filename, Qwrite_region); |
b56ad927 | 4742 | /* If FILENAME has no handler, see if VISIT has one. */ |
93c30b5f | 4743 | if (NILP (handler) && STRINGP (visit)) |
199607e4 | 4744 | handler = Ffind_file_name_handler (visit, Qwrite_region); |
3eac9910 | 4745 | |
32f4334d RS |
4746 | if (!NILP (handler)) |
4747 | { | |
32f4334d | 4748 | Lisp_Object val; |
51cf6d37 RS |
4749 | val = call6 (handler, Qwrite_region, start, end, |
4750 | filename, append, visit); | |
32f4334d | 4751 | |
d6a3cc15 | 4752 | if (visiting) |
32f4334d | 4753 | { |
95385625 | 4754 | SAVE_MODIFF = MODIFF; |
4b4deea2 | 4755 | XSETFASTINT (BVAR (current_buffer, save_length), Z - BEG); |
39eb03f1 | 4756 | bset_filename (current_buffer, visit_file); |
32f4334d | 4757 | } |
09121adc | 4758 | UNGCPRO; |
32f4334d RS |
4759 | return val; |
4760 | } | |
4761 | ||
4a38de71 KH |
4762 | record_unwind_protect (save_restriction_restore, save_restriction_save ()); |
4763 | ||
561cb8e1 RS |
4764 | /* Special kludge to simplify auto-saving. */ |
4765 | if (NILP (start)) | |
4766 | { | |
6b3d752c SM |
4767 | /* Do it later, so write-region-annotate-function can work differently |
4768 | if we save "the buffer" vs "a region". | |
4769 | This is useful in tar-mode. --Stef | |
2acfd7ae | 4770 | XSETFASTINT (start, BEG); |
6b3d752c | 4771 | XSETFASTINT (end, Z); */ |
4a38de71 | 4772 | Fwiden (); |
561cb8e1 RS |
4773 | } |
4774 | ||
67fbc0cb CY |
4775 | record_unwind_protect (build_annotations_unwind, |
4776 | Vwrite_region_annotation_buffers); | |
6c6f1994 | 4777 | Vwrite_region_annotation_buffers = list1 (Fcurrent_buffer ()); |
6fc6f94b RS |
4778 | |
4779 | given_buffer = current_buffer; | |
bf3428a1 RS |
4780 | |
4781 | if (!STRINGP (start)) | |
236a12f2 | 4782 | { |
bf3428a1 RS |
4783 | annotations = build_annotations (start, end); |
4784 | ||
4785 | if (current_buffer != given_buffer) | |
4786 | { | |
4787 | XSETFASTINT (start, BEGV); | |
4788 | XSETFASTINT (end, ZV); | |
4789 | } | |
236a12f2 SM |
4790 | } |
4791 | ||
6b3d752c SM |
4792 | if (NILP (start)) |
4793 | { | |
4794 | XSETFASTINT (start, BEGV); | |
4795 | XSETFASTINT (end, ZV); | |
4796 | } | |
4797 | ||
236a12f2 SM |
4798 | UNGCPRO; |
4799 | ||
4800 | GCPRO5 (start, filename, annotations, visit_file, lockname); | |
4801 | ||
59fac292 SM |
4802 | /* Decide the coding-system to encode the data with. |
4803 | We used to make this choice before calling build_annotations, but that | |
4804 | leads to problems when a write-annotate-function takes care of | |
4805 | unsavable chars (as was the case with X-Symbol). */ | |
538f3845 | 4806 | Vlast_coding_system_used = |
9dbda100 | 4807 | Fchoose_write_coding_system (start, end, filename, |
538f3845 | 4808 | append, visit, lockname); |
9dbda100 GM |
4809 | |
4810 | setup_coding_system (Vlast_coding_system_used, &coding); | |
4811 | ||
4812 | if (!STRINGP (start) && !NILP (BVAR (current_buffer, selective_display))) | |
4813 | coding.mode |= CODING_MODE_SELECTIVE_DISPLAY; | |
d6a3cc15 | 4814 | |
570d7624 | 4815 | #ifdef CLASH_DETECTION |
94fcd171 PE |
4816 | if (open_and_close_file && !auto_saving) |
4817 | { | |
4818 | lock_file (lockname); | |
4819 | file_locked = 1; | |
4820 | } | |
570d7624 JB |
4821 | #endif /* CLASH_DETECTION */ |
4822 | ||
b1d1b865 | 4823 | encoded_filename = ENCODE_FILE (filename); |
5976c3fe | 4824 | fn = SSDATA (encoded_filename); |
3a955a1f PE |
4825 | open_flags = O_WRONLY | O_BINARY | O_CREAT; |
4826 | open_flags |= EQ (mustbenew, Qexcl) ? O_EXCL : !NILP (append) ? 0 : O_TRUNC; | |
4827 | if (NUMBERP (append)) | |
4828 | offset = file_offset (append); | |
4829 | else if (!NILP (append)) | |
4830 | open_flags |= O_APPEND; | |
5e570b75 | 4831 | #ifdef DOS_NT |
3a955a1f PE |
4832 | mode = S_IREAD | S_IWRITE; |
4833 | #else | |
4834 | mode = auto_saving ? auto_save_mode_bits : 0666; | |
4835 | #endif | |
4836 | ||
94fcd171 | 4837 | if (open_and_close_file) |
570d7624 | 4838 | { |
94fcd171 PE |
4839 | desc = emacs_open (fn, open_flags, mode); |
4840 | if (desc < 0) | |
4841 | { | |
4842 | int open_errno = errno; | |
570d7624 | 4843 | #ifdef CLASH_DETECTION |
94fcd171 PE |
4844 | if (file_locked) |
4845 | unlock_file (lockname); | |
570d7624 | 4846 | #endif /* CLASH_DETECTION */ |
94fcd171 PE |
4847 | UNGCPRO; |
4848 | report_file_errno ("Opening output file", filename, open_errno); | |
4849 | } | |
570d7624 | 4850 | |
94fcd171 PE |
4851 | count1 = SPECPDL_INDEX (); |
4852 | record_unwind_protect_int (close_file_unwind, desc); | |
4853 | } | |
570d7624 | 4854 | |
3a955a1f | 4855 | if (NUMBERP (append)) |
43fb7d9a | 4856 | { |
3a955a1f | 4857 | off_t ret = lseek (desc, offset, SEEK_SET); |
43fb7d9a DL |
4858 | if (ret < 0) |
4859 | { | |
a773ed9a | 4860 | int lseek_errno = errno; |
570d7624 | 4861 | #ifdef CLASH_DETECTION |
94fcd171 PE |
4862 | if (file_locked) |
4863 | unlock_file (lockname); | |
570d7624 | 4864 | #endif /* CLASH_DETECTION */ |
43fb7d9a | 4865 | UNGCPRO; |
a9757f6a | 4866 | report_file_errno ("Lseek error", filename, lseek_errno); |
43fb7d9a DL |
4867 | } |
4868 | } | |
efdc16c9 | 4869 | |
43fb7d9a | 4870 | UNGCPRO; |
570d7624 | 4871 | |
570d7624 JB |
4872 | immediate_quit = 1; |
4873 | ||
561cb8e1 | 4874 | if (STRINGP (start)) |
f75d7a91 | 4875 | ok = a_write (desc, start, 0, SCHARS (start), &annotations, &coding); |
570d7624 | 4876 | else if (XINT (start) != XINT (end)) |
f75d7a91 PE |
4877 | ok = a_write (desc, Qnil, XINT (start), XINT (end) - XINT (start), |
4878 | &annotations, &coding); | |
69f6e679 RS |
4879 | else |
4880 | { | |
f75d7a91 | 4881 | /* If file was empty, still need to write the annotations. */ |
c8a6d68a | 4882 | coding.mode |= CODING_MODE_LAST_BLOCK; |
f75d7a91 | 4883 | ok = a_write (desc, Qnil, XINT (end), 0, &annotations, &coding); |
6fdaa9a0 | 4884 | } |
f75d7a91 | 4885 | save_errno = errno; |
6fdaa9a0 | 4886 | |
f75d7a91 PE |
4887 | if (ok && CODING_REQUIRE_FLUSHING (&coding) |
4888 | && !(coding.mode & CODING_MODE_LAST_BLOCK)) | |
6fdaa9a0 KH |
4889 | { |
4890 | /* We have to flush out a data. */ | |
c8a6d68a | 4891 | coding.mode |= CODING_MODE_LAST_BLOCK; |
f75d7a91 | 4892 | ok = e_write (desc, Qnil, 1, 1, &coding); |
69f6e679 | 4893 | save_errno = errno; |
570d7624 JB |
4894 | } |
4895 | ||
4896 | immediate_quit = 0; | |
4897 | ||
94fcd171 PE |
4898 | /* fsync is not crucial for temporary files. Nor for auto-save |
4899 | files, since they might lose some work anyway. */ | |
4900 | if (open_and_close_file && !auto_saving && !write_region_inhibit_fsync) | |
cb33c142 | 4901 | { |
cbee2131 PE |
4902 | /* Transfer data and metadata to disk, retrying if interrupted. |
4903 | fsync can report a write failure here, e.g., due to disk full | |
4904 | under NFS. But ignore EINVAL, which means fsync is not | |
4905 | supported on this file. */ | |
47d7532e PE |
4906 | while (fsync (desc) != 0) |
4907 | if (errno != EINTR) | |
4908 | { | |
4909 | if (errno != EINVAL) | |
4910 | ok = 0, save_errno = errno; | |
4911 | break; | |
4912 | } | |
cb33c142 | 4913 | } |
570d7624 | 4914 | |
43aac990 | 4915 | modtime = invalid_timespec (); |
d6453ce4 PE |
4916 | if (visiting) |
4917 | { | |
4918 | if (fstat (desc, &st) == 0) | |
4919 | modtime = get_stat_mtime (&st); | |
4920 | else | |
4921 | ok = 0, save_errno = errno; | |
4922 | } | |
4923 | ||
94fcd171 PE |
4924 | if (open_and_close_file) |
4925 | { | |
4926 | /* NFS can report a write failure now. */ | |
4927 | if (emacs_close (desc) < 0) | |
4928 | ok = 0, save_errno = errno; | |
570d7624 | 4929 | |
94fcd171 PE |
4930 | /* Discard the unwind protect for close_file_unwind. */ |
4931 | specpdl_ptr = specpdl + count1; | |
4932 | } | |
67fbc0cb | 4933 | |
9fe43ff6 PE |
4934 | /* Some file systems have a bug where st_mtime is not updated |
4935 | properly after a write. For example, CIFS might not see the | |
4936 | st_mtime change until after the file is opened again. | |
4937 | ||
4938 | Attempt to detect this file system bug, and update MODTIME to the | |
4939 | newer st_mtime if the bug appears to be present. This introduces | |
4940 | a race condition, so to avoid most instances of the race condition | |
4941 | on non-buggy file systems, skip this check if the most recently | |
4942 | encountered non-buggy file system was the current file system. | |
4943 | ||
4944 | A race condition can occur if some other process modifies the | |
4945 | file between the fstat above and the fstat below, but the race is | |
4946 | unlikely and a similar race between the last write and the fstat | |
4947 | above cannot possibly be closed anyway. */ | |
4948 | ||
43aac990 | 4949 | if (timespec_valid_p (modtime) |
9fe43ff6 PE |
4950 | && ! (valid_timestamp_file_system && st.st_dev == timestamp_file_system)) |
4951 | { | |
21cd50b8 | 4952 | int desc1 = emacs_open (fn, O_WRONLY | O_BINARY, 0); |
908589fd | 4953 | if (desc1 >= 0) |
9fe43ff6 PE |
4954 | { |
4955 | struct stat st1; | |
4956 | if (fstat (desc1, &st1) == 0 | |
4957 | && st.st_dev == st1.st_dev && st.st_ino == st1.st_ino) | |
4958 | { | |
8ea41ea9 PE |
4959 | /* Use the heuristic if it appears to be valid. With neither |
4960 | O_EXCL nor O_TRUNC, if Emacs happened to write nothing to the | |
4961 | file, the time stamp won't change. Also, some non-POSIX | |
4962 | systems don't update an empty file's time stamp when | |
4963 | truncating it. Finally, file systems with 100 ns or worse | |
4964 | resolution sometimes seem to have bugs: on a system with ns | |
4965 | resolution, checking ns % 100 incorrectly avoids the heuristic | |
4966 | 1% of the time, but the problem should be temporary as we will | |
4967 | try again on the next time stamp. */ | |
4968 | bool use_heuristic | |
4969 | = ((open_flags & (O_EXCL | O_TRUNC)) != 0 | |
4970 | && st.st_size != 0 | |
43aac990 | 4971 | && modtime.tv_nsec % 100 != 0); |
8ea41ea9 | 4972 | |
43aac990 | 4973 | struct timespec modtime1 = get_stat_mtime (&st1); |
8ea41ea9 | 4974 | if (use_heuristic |
43aac990 | 4975 | && timespec_cmp (modtime, modtime1) == 0 |
9fe43ff6 PE |
4976 | && st.st_size == st1.st_size) |
4977 | { | |
4978 | timestamp_file_system = st.st_dev; | |
4979 | valid_timestamp_file_system = 1; | |
4980 | } | |
4981 | else | |
4982 | { | |
4983 | st.st_size = st1.st_size; | |
4984 | modtime = modtime1; | |
4985 | } | |
4986 | } | |
4987 | emacs_close (desc1); | |
4988 | } | |
4989 | } | |
4990 | ||
67fbc0cb | 4991 | /* Call write-region-post-annotation-function. */ |
294fa707 | 4992 | while (CONSP (Vwrite_region_annotation_buffers)) |
67fbc0cb CY |
4993 | { |
4994 | Lisp_Object buf = XCAR (Vwrite_region_annotation_buffers); | |
4995 | if (!NILP (Fbuffer_live_p (buf))) | |
4996 | { | |
4997 | Fset_buffer (buf); | |
4998 | if (FUNCTIONP (Vwrite_region_post_annotation_function)) | |
4999 | call0 (Vwrite_region_post_annotation_function); | |
5000 | } | |
5001 | Vwrite_region_annotation_buffers | |
5002 | = XCDR (Vwrite_region_annotation_buffers); | |
5003 | } | |
5004 | ||
5005 | unbind_to (count, Qnil); | |
570d7624 JB |
5006 | |
5007 | #ifdef CLASH_DETECTION | |
94fcd171 | 5008 | if (file_locked) |
7204a979 | 5009 | unlock_file (lockname); |
570d7624 JB |
5010 | #endif /* CLASH_DETECTION */ |
5011 | ||
5012 | /* Do this before reporting IO error | |
5013 | to avoid a "file has changed on disk" warning on | |
5014 | next attempt to save. */ | |
43aac990 | 5015 | if (timespec_valid_p (modtime)) |
58b963f7 | 5016 | { |
d6453ce4 | 5017 | current_buffer->modtime = modtime; |
58b963f7 SM |
5018 | current_buffer->modtime_size = st.st_size; |
5019 | } | |
570d7624 | 5020 | |
f75d7a91 | 5021 | if (! ok) |
4e604a5d | 5022 | report_file_errno ("Write error", filename, save_errno); |
570d7624 | 5023 | |
d6a3cc15 | 5024 | if (visiting) |
570d7624 | 5025 | { |
95385625 | 5026 | SAVE_MODIFF = MODIFF; |
4b4deea2 | 5027 | XSETFASTINT (BVAR (current_buffer, save_length), Z - BEG); |
39eb03f1 | 5028 | bset_filename (current_buffer, visit_file); |
2ec9db5d | 5029 | update_mode_lines = 14; |
570d7624 | 5030 | } |
d6a3cc15 | 5031 | else if (quietly) |
6b61353c KH |
5032 | { |
5033 | if (auto_saving | |
4b4deea2 TT |
5034 | && ! NILP (Fstring_equal (BVAR (current_buffer, filename), |
5035 | BVAR (current_buffer, auto_save_file_name)))) | |
6b61353c KH |
5036 | SAVE_MODIFF = MODIFF; |
5037 | ||
5038 | return Qnil; | |
5039 | } | |
570d7624 JB |
5040 | |
5041 | if (!auto_saving) | |
3908c576 | 5042 | message_with_string ((NUMBERP (append) |
0c328a0e RS |
5043 | ? "Updated %s" |
5044 | : ! NILP (append) | |
5045 | ? "Added to %s" | |
5046 | : "Wrote %s"), | |
5047 | visit_file, 1); | |
570d7624 JB |
5048 | |
5049 | return Qnil; | |
5050 | } | |
ec7adf26 | 5051 | \f |
d6a3cc15 | 5052 | DEFUN ("car-less-than-car", Fcar_less_than_car, Scar_less_than_car, 2, 2, 0, |
8c1a1077 | 5053 | doc: /* Return t if (car A) is numerically less than (car B). */) |
5842a27b | 5054 | (Lisp_Object a, Lisp_Object b) |
d6a3cc15 | 5055 | { |
56a0e352 PE |
5056 | Lisp_Object args[2]; |
5057 | args[0] = Fcar (a); | |
5058 | args[1] = Fcar (b); | |
ebb99847 | 5059 | return Flss (2, args); |
d6a3cc15 RS |
5060 | } |
5061 | ||
5062 | /* Build the complete list of annotations appropriate for writing out | |
5063 | the text between START and END, by calling all the functions in | |
6fc6f94b RS |
5064 | write-region-annotate-functions and merging the lists they return. |
5065 | If one of these functions switches to a different buffer, we assume | |
5066 | that buffer contains altered text. Therefore, the caller must | |
5067 | make sure to restore the current buffer in all cases, | |
5068 | as save-excursion would do. */ | |
d6a3cc15 RS |
5069 | |
5070 | static Lisp_Object | |
971de7fb | 5071 | build_annotations (Lisp_Object start, Lisp_Object end) |
d6a3cc15 RS |
5072 | { |
5073 | Lisp_Object annotations; | |
5074 | Lisp_Object p, res; | |
5075 | struct gcpro gcpro1, gcpro2; | |
0a20b684 | 5076 | Lisp_Object original_buffer; |
f75d7a91 PE |
5077 | int i; |
5078 | bool used_global = 0; | |
0a20b684 RS |
5079 | |
5080 | XSETBUFFER (original_buffer, current_buffer); | |
d6a3cc15 RS |
5081 | |
5082 | annotations = Qnil; | |
5083 | p = Vwrite_region_annotate_functions; | |
5084 | GCPRO2 (annotations, p); | |
28c3eb5a | 5085 | while (CONSP (p)) |
d6a3cc15 | 5086 | { |
6fc6f94b | 5087 | struct buffer *given_buffer = current_buffer; |
bd235610 SM |
5088 | if (EQ (Qt, XCAR (p)) && !used_global) |
5089 | { /* Use the global value of the hook. */ | |
5090 | Lisp_Object arg[2]; | |
5091 | used_global = 1; | |
5092 | arg[0] = Fdefault_value (Qwrite_region_annotate_functions); | |
5093 | arg[1] = XCDR (p); | |
5094 | p = Fappend (2, arg); | |
5095 | continue; | |
5096 | } | |
6fc6f94b | 5097 | Vwrite_region_annotations_so_far = annotations; |
28c3eb5a | 5098 | res = call2 (XCAR (p), start, end); |
6fc6f94b RS |
5099 | /* If the function makes a different buffer current, |
5100 | assume that means this buffer contains altered text to be output. | |
5101 | Reset START and END from the buffer bounds | |
5102 | and discard all previous annotations because they should have | |
5103 | been dealt with by this function. */ | |
5104 | if (current_buffer != given_buffer) | |
5105 | { | |
67fbc0cb CY |
5106 | Vwrite_region_annotation_buffers |
5107 | = Fcons (Fcurrent_buffer (), | |
5108 | Vwrite_region_annotation_buffers); | |
3cf29f61 RS |
5109 | XSETFASTINT (start, BEGV); |
5110 | XSETFASTINT (end, ZV); | |
6fc6f94b RS |
5111 | annotations = Qnil; |
5112 | } | |
d6a3cc15 RS |
5113 | Flength (res); /* Check basic validity of return value */ |
5114 | annotations = merge (annotations, res, Qcar_less_than_car); | |
28c3eb5a | 5115 | p = XCDR (p); |
d6a3cc15 | 5116 | } |
0d420e88 BG |
5117 | |
5118 | /* Now do the same for annotation functions implied by the file-format */ | |
4b4deea2 TT |
5119 | if (auto_saving && (!EQ (BVAR (current_buffer, auto_save_file_format), Qt))) |
5120 | p = BVAR (current_buffer, auto_save_file_format); | |
0d420e88 | 5121 | else |
4b4deea2 | 5122 | p = BVAR (current_buffer, file_format); |
28c3eb5a | 5123 | for (i = 0; CONSP (p); p = XCDR (p), ++i) |
0d420e88 BG |
5124 | { |
5125 | struct buffer *given_buffer = current_buffer; | |
efdc16c9 | 5126 | |
0d420e88 | 5127 | Vwrite_region_annotations_so_far = annotations; |
532ed661 GM |
5128 | |
5129 | /* Value is either a list of annotations or nil if the function | |
5130 | has written annotations to a temporary buffer, which is now | |
5131 | current. */ | |
28c3eb5a | 5132 | res = call5 (Qformat_annotate_function, XCAR (p), start, end, |
532ed661 | 5133 | original_buffer, make_number (i)); |
0d420e88 BG |
5134 | if (current_buffer != given_buffer) |
5135 | { | |
3cf29f61 RS |
5136 | XSETFASTINT (start, BEGV); |
5137 | XSETFASTINT (end, ZV); | |
0d420e88 BG |
5138 | annotations = Qnil; |
5139 | } | |
efdc16c9 | 5140 | |
532ed661 GM |
5141 | if (CONSP (res)) |
5142 | annotations = merge (annotations, res, Qcar_less_than_car); | |
0d420e88 | 5143 | } |
6fdaa9a0 | 5144 | |
236a12f2 SM |
5145 | UNGCPRO; |
5146 | return annotations; | |
5147 | } | |
5148 | ||
ec7adf26 | 5149 | \f |
ce51c54c KH |
5150 | /* Write to descriptor DESC the NCHARS chars starting at POS of STRING. |
5151 | If STRING is nil, POS is the character position in the current buffer. | |
d6a3cc15 | 5152 | Intersperse with them the annotations from *ANNOT |
ce51c54c | 5153 | which fall within the range of POS to POS + NCHARS, |
d6a3cc15 RS |
5154 | each at its appropriate position. |
5155 | ||
ec7adf26 RS |
5156 | We modify *ANNOT by discarding elements as we use them up. |
5157 | ||
f75d7a91 | 5158 | Return true if successful. */ |
d6a3cc15 | 5159 | |
f75d7a91 | 5160 | static bool |
d311d28c | 5161 | a_write (int desc, Lisp_Object string, ptrdiff_t pos, |
f75d7a91 | 5162 | ptrdiff_t nchars, Lisp_Object *annot, |
8a2cbd72 | 5163 | struct coding_system *coding) |
d6a3cc15 RS |
5164 | { |
5165 | Lisp_Object tem; | |
d311d28c PE |
5166 | ptrdiff_t nextpos; |
5167 | ptrdiff_t lastpos = pos + nchars; | |
d6a3cc15 | 5168 | |
eb15aa18 | 5169 | while (NILP (*annot) || CONSP (*annot)) |
d6a3cc15 RS |
5170 | { |
5171 | tem = Fcar_safe (Fcar (*annot)); | |
ce51c54c | 5172 | nextpos = pos - 1; |
ec7adf26 | 5173 | if (INTEGERP (tem)) |
ce51c54c | 5174 | nextpos = XFASTINT (tem); |
ec7adf26 RS |
5175 | |
5176 | /* If there are no more annotations in this range, | |
5177 | output the rest of the range all at once. */ | |
ce51c54c KH |
5178 | if (! (nextpos >= pos && nextpos <= lastpos)) |
5179 | return e_write (desc, string, pos, lastpos, coding); | |
ec7adf26 RS |
5180 | |
5181 | /* Output buffer text up to the next annotation's position. */ | |
ce51c54c | 5182 | if (nextpos > pos) |
d6a3cc15 | 5183 | { |
f75d7a91 PE |
5184 | if (!e_write (desc, string, pos, nextpos, coding)) |
5185 | return 0; | |
ce51c54c | 5186 | pos = nextpos; |
d6a3cc15 | 5187 | } |
ec7adf26 | 5188 | /* Output the annotation. */ |
d6a3cc15 RS |
5189 | tem = Fcdr (Fcar (*annot)); |
5190 | if (STRINGP (tem)) | |
5191 | { | |
f75d7a91 PE |
5192 | if (!e_write (desc, tem, 0, SCHARS (tem), coding)) |
5193 | return 0; | |
d6a3cc15 RS |
5194 | } |
5195 | *annot = Fcdr (*annot); | |
5196 | } | |
f75d7a91 | 5197 | return 1; |
d6a3cc15 RS |
5198 | } |
5199 | ||
f8498081 DA |
5200 | /* Maximum number of characters that the next |
5201 | function encodes per one loop iteration. */ | |
5202 | ||
5203 | enum { E_WRITE_MAX = 8 * 1024 * 1024 }; | |
6fdaa9a0 | 5204 | |
ce51c54c KH |
5205 | /* Write text in the range START and END into descriptor DESC, |
5206 | encoding them with coding system CODING. If STRING is nil, START | |
5207 | and END are character positions of the current buffer, else they | |
f75d7a91 | 5208 | are indexes to the string STRING. Return true if successful. */ |
ec7adf26 | 5209 | |
f75d7a91 | 5210 | static bool |
d311d28c | 5211 | e_write (int desc, Lisp_Object string, ptrdiff_t start, ptrdiff_t end, |
8a2cbd72 | 5212 | struct coding_system *coding) |
570d7624 | 5213 | { |
ce51c54c KH |
5214 | if (STRINGP (string)) |
5215 | { | |
db327c7e | 5216 | start = 0; |
8f924df7 | 5217 | end = SCHARS (string); |
ce51c54c | 5218 | } |
570d7624 | 5219 | |
6fdaa9a0 KH |
5220 | /* We used to have a code for handling selective display here. But, |
5221 | now it is handled within encode_coding. */ | |
01ca97a2 KH |
5222 | |
5223 | while (start < end) | |
570d7624 | 5224 | { |
01ca97a2 | 5225 | if (STRINGP (string)) |
6ad568dd | 5226 | { |
01ca97a2 KH |
5227 | coding->src_multibyte = SCHARS (string) < SBYTES (string); |
5228 | if (CODING_REQUIRE_ENCODING (coding)) | |
5229 | { | |
f8498081 DA |
5230 | ptrdiff_t nchars = min (end - start, E_WRITE_MAX); |
5231 | ||
5232 | /* Avoid creating huge Lisp string in encode_coding_object. */ | |
5233 | if (nchars == E_WRITE_MAX) | |
5234 | coding->raw_destination = 1; | |
5235 | ||
5236 | encode_coding_object | |
5237 | (coding, string, start, string_char_to_byte (string, start), | |
5238 | start + nchars, string_char_to_byte (string, start + nchars), | |
5239 | Qt); | |
01ca97a2 KH |
5240 | } |
5241 | else | |
5242 | { | |
5243 | coding->dst_object = string; | |
5244 | coding->consumed_char = SCHARS (string); | |
5245 | coding->produced = SBYTES (string); | |
5246 | } | |
6ad568dd | 5247 | } |
db327c7e | 5248 | else |
6ad568dd | 5249 | { |
d311d28c PE |
5250 | ptrdiff_t start_byte = CHAR_TO_BYTE (start); |
5251 | ptrdiff_t end_byte = CHAR_TO_BYTE (end); | |
b4132433 | 5252 | |
01ca97a2 KH |
5253 | coding->src_multibyte = (end - start) < (end_byte - start_byte); |
5254 | if (CODING_REQUIRE_ENCODING (coding)) | |
5255 | { | |
f8498081 DA |
5256 | ptrdiff_t nchars = min (end - start, E_WRITE_MAX); |
5257 | ||
5258 | /* Likewise. */ | |
5259 | if (nchars == E_WRITE_MAX) | |
5260 | coding->raw_destination = 1; | |
5261 | ||
5262 | encode_coding_object | |
5263 | (coding, Fcurrent_buffer (), start, start_byte, | |
5264 | start + nchars, CHAR_TO_BYTE (start + nchars), Qt); | |
01ca97a2 KH |
5265 | } |
5266 | else | |
5267 | { | |
5268 | coding->dst_object = Qnil; | |
5269 | coding->dst_pos_byte = start_byte; | |
5270 | if (start >= GPT || end <= GPT) | |
5271 | { | |
5272 | coding->consumed_char = end - start; | |
5273 | coding->produced = end_byte - start_byte; | |
5274 | } | |
5275 | else | |
5276 | { | |
5277 | coding->consumed_char = GPT - start; | |
5278 | coding->produced = GPT_BYTE - start_byte; | |
5279 | } | |
5280 | } | |
c185d744 | 5281 | } |
01ca97a2 KH |
5282 | |
5283 | if (coding->produced > 0) | |
c185d744 | 5284 | { |
f8498081 DA |
5285 | char *buf = (coding->raw_destination ? (char *) coding->destination |
5286 | : (STRINGP (coding->dst_object) | |
5287 | ? SSDATA (coding->dst_object) | |
5288 | : (char *) BYTE_POS_ADDR (coding->dst_pos_byte))); | |
4ebbdd67 | 5289 | coding->produced -= emacs_write_sig (desc, buf, coding->produced); |
01ca97a2 | 5290 | |
f8498081 DA |
5291 | if (coding->raw_destination) |
5292 | { | |
5293 | /* We're responsible for freeing this, see | |
5294 | encode_coding_object to check why. */ | |
5295 | xfree (coding->destination); | |
5296 | coding->raw_destination = 0; | |
5297 | } | |
01ca97a2 | 5298 | if (coding->produced) |
f75d7a91 | 5299 | return 0; |
570d7624 | 5300 | } |
01ca97a2 | 5301 | start += coding->consumed_char; |
c185d744 KH |
5302 | } |
5303 | ||
f75d7a91 | 5304 | return 1; |
570d7624 | 5305 | } |
ec7adf26 | 5306 | \f |
a7ca3326 | 5307 | DEFUN ("verify-visited-file-modtime", Fverify_visited_file_modtime, |
ec1b9b17 | 5308 | Sverify_visited_file_modtime, 0, 1, 0, |
8c1a1077 | 5309 | doc: /* Return t if last mod time of BUF's visited file matches what BUF records. |
6b61353c | 5310 | This means that the file has not been changed since it was visited or saved. |
ec1b9b17 | 5311 | If BUF is omitted or nil, it defaults to the current buffer. |
6b61353c | 5312 | See Info node `(elisp)Modification Time' for more details. */) |
5842a27b | 5313 | (Lisp_Object buf) |
570d7624 JB |
5314 | { |
5315 | struct buffer *b; | |
5316 | struct stat st; | |
32f4334d | 5317 | Lisp_Object handler; |
b1d1b865 | 5318 | Lisp_Object filename; |
43aac990 | 5319 | struct timespec mtime; |
570d7624 | 5320 | |
ec1b9b17 GM |
5321 | if (NILP (buf)) |
5322 | b = current_buffer; | |
5323 | else | |
5324 | { | |
5325 | CHECK_BUFFER (buf); | |
5326 | b = XBUFFER (buf); | |
5327 | } | |
570d7624 | 5328 | |
4b4deea2 | 5329 | if (!STRINGP (BVAR (b, filename))) return Qt; |
43aac990 | 5330 | if (b->modtime.tv_nsec == UNKNOWN_MODTIME_NSECS) return Qt; |
570d7624 | 5331 | |
32f4334d RS |
5332 | /* If the file name has special constructs in it, |
5333 | call the corresponding file handler. */ | |
4b4deea2 | 5334 | handler = Ffind_file_name_handler (BVAR (b, filename), |
49307295 | 5335 | Qverify_visited_file_modtime); |
32f4334d | 5336 | if (!NILP (handler)) |
09121adc | 5337 | return call2 (handler, Qverify_visited_file_modtime, buf); |
32f4334d | 5338 | |
4b4deea2 | 5339 | filename = ENCODE_FILE (BVAR (b, filename)); |
b1d1b865 | 5340 | |
dbeed9a6 PE |
5341 | mtime = (stat (SSDATA (filename), &st) == 0 |
5342 | ? get_stat_mtime (&st) | |
f0941253 | 5343 | : time_error_value (errno)); |
43aac990 | 5344 | if (timespec_cmp (mtime, b->modtime) == 0 |
645c6a30 PE |
5345 | && (b->modtime_size < 0 |
5346 | || st.st_size == b->modtime_size)) | |
570d7624 JB |
5347 | return Qt; |
5348 | return Qnil; | |
5349 | } | |
5350 | ||
f5d5eccf | 5351 | DEFUN ("visited-file-modtime", Fvisited_file_modtime, |
8c1a1077 PJ |
5352 | Svisited_file_modtime, 0, 0, 0, |
5353 | doc: /* Return the current buffer's recorded visited file modification time. | |
d35af63c | 5354 | The value is a list of the form (HIGH LOW USEC PSEC), like the time values that |
1c4d7f3d LMI |
5355 | `file-attributes' returns. If the current buffer has no recorded file |
5356 | modification time, this function returns 0. If the visited file | |
954b166e | 5357 | doesn't exist, return -1. |
6b61353c | 5358 | See Info node `(elisp)Modification Time' for more details. */) |
5842a27b | 5359 | (void) |
f5d5eccf | 5360 | { |
43aac990 | 5361 | int ns = current_buffer->modtime.tv_nsec; |
954b166e PE |
5362 | if (ns < 0) |
5363 | return make_number (UNKNOWN_MODTIME_NSECS - ns); | |
d35af63c | 5364 | return make_lisp_time (current_buffer->modtime); |
f5d5eccf RS |
5365 | } |
5366 | ||
570d7624 | 5367 | DEFUN ("set-visited-file-modtime", Fset_visited_file_modtime, |
8c1a1077 PJ |
5368 | Sset_visited_file_modtime, 0, 1, 0, |
5369 | doc: /* Update buffer's recorded modification time from the visited file's time. | |
5370 | Useful if the buffer was not read from the file normally | |
5371 | or if the file itself has been changed for some known benign reason. | |
5372 | An argument specifies the modification time value to use | |
5373 | \(instead of that of the visited file), in the form of a list | |
954b166e PE |
5374 | \(HIGH LOW USEC PSEC) or an integer flag as returned by |
5375 | `visited-file-modtime'. */) | |
5376 | (Lisp_Object time_flag) | |
570d7624 | 5377 | { |
954b166e | 5378 | if (!NILP (time_flag)) |
58b963f7 | 5379 | { |
43aac990 | 5380 | struct timespec mtime; |
954b166e PE |
5381 | if (INTEGERP (time_flag)) |
5382 | { | |
5383 | CHECK_RANGED_INTEGER (time_flag, -1, 0); | |
43aac990 | 5384 | mtime = make_timespec (0, UNKNOWN_MODTIME_NSECS - XINT (time_flag)); |
954b166e PE |
5385 | } |
5386 | else | |
5387 | mtime = lisp_time_argument (time_flag); | |
5388 | ||
5389 | current_buffer->modtime = mtime; | |
58b963f7 SM |
5390 | current_buffer->modtime_size = -1; |
5391 | } | |
f5d5eccf RS |
5392 | else |
5393 | { | |
5394 | register Lisp_Object filename; | |
5395 | struct stat st; | |
5396 | Lisp_Object handler; | |
570d7624 | 5397 | |
4b4deea2 | 5398 | filename = Fexpand_file_name (BVAR (current_buffer, filename), Qnil); |
32f4334d | 5399 | |
f5d5eccf RS |
5400 | /* If the file name has special constructs in it, |
5401 | call the corresponding file handler. */ | |
49307295 | 5402 | handler = Ffind_file_name_handler (filename, Qset_visited_file_modtime); |
f5d5eccf | 5403 | if (!NILP (handler)) |
caf3c431 | 5404 | /* The handler can find the file name the same way we did. */ |
76c881b0 | 5405 | return call2 (handler, Qset_visited_file_modtime, Qnil); |
b1d1b865 RS |
5406 | |
5407 | filename = ENCODE_FILE (filename); | |
5408 | ||
42a5b22f | 5409 | if (stat (SSDATA (filename), &st) >= 0) |
58b963f7 | 5410 | { |
d35af63c | 5411 | current_buffer->modtime = get_stat_mtime (&st); |
58b963f7 SM |
5412 | current_buffer->modtime_size = st.st_size; |
5413 | } | |
f5d5eccf | 5414 | } |
570d7624 JB |
5415 | |
5416 | return Qnil; | |
5417 | } | |
5418 | \f | |
f14b7e14 | 5419 | static Lisp_Object |
f839df0c | 5420 | auto_save_error (Lisp_Object error_val) |
570d7624 | 5421 | { |
d7f31e22 | 5422 | Lisp_Object args[3], msg; |
b09cca6a | 5423 | int i; |
d7f31e22 | 5424 | struct gcpro gcpro1; |
efdc16c9 | 5425 | |
ca730bf0 CY |
5426 | auto_save_error_occurred = 1; |
5427 | ||
385ed61f | 5428 | ring_bell (XFRAME (selected_frame)); |
efdc16c9 | 5429 | |
d7f31e22 | 5430 | args[0] = build_string ("Auto-saving %s: %s"); |
4b4deea2 | 5431 | args[1] = BVAR (current_buffer, name); |
f839df0c | 5432 | args[2] = Ferror_message_string (error_val); |
d7f31e22 GM |
5433 | msg = Fformat (3, args); |
5434 | GCPRO1 (msg); | |
d7f31e22 GM |
5435 | |
5436 | for (i = 0; i < 3; ++i) | |
5437 | { | |
5438 | if (i == 0) | |
b09cca6a | 5439 | message3 (msg); |
d7f31e22 | 5440 | else |
b09cca6a | 5441 | message3_nolog (msg); |
d7f31e22 GM |
5442 | Fsleep_for (make_number (1), Qnil); |
5443 | } | |
5444 | ||
5445 | UNGCPRO; | |
570d7624 JB |
5446 | return Qnil; |
5447 | } | |
5448 | ||
f14b7e14 | 5449 | static Lisp_Object |
971de7fb | 5450 | auto_save_1 (void) |
570d7624 | 5451 | { |
570d7624 | 5452 | struct stat st; |
d4a42098 KS |
5453 | Lisp_Object modes; |
5454 | ||
5455 | auto_save_mode_bits = 0666; | |
570d7624 JB |
5456 | |
5457 | /* Get visited file's mode to become the auto save file's mode. */ | |
4b4deea2 | 5458 | if (! NILP (BVAR (current_buffer, filename))) |
d4a42098 | 5459 | { |
4b4deea2 | 5460 | if (stat (SSDATA (BVAR (current_buffer, filename)), &st) >= 0) |
d4a42098 | 5461 | /* But make sure we can overwrite it later! */ |
18c52557 | 5462 | auto_save_mode_bits = (st.st_mode | 0600) & 0777; |
ce2fe65a AS |
5463 | else if (modes = Ffile_modes (BVAR (current_buffer, filename)), |
5464 | INTEGERP (modes)) | |
d4a42098 | 5465 | /* Remote files don't cooperate with stat. */ |
18c52557 | 5466 | auto_save_mode_bits = (XINT (modes) | 0600) & 0777; |
d4a42098 | 5467 | } |
570d7624 JB |
5468 | |
5469 | return | |
4b4deea2 | 5470 | Fwrite_region (Qnil, Qnil, BVAR (current_buffer, auto_save_file_name), Qnil, |
699b53bc CY |
5471 | NILP (Vauto_save_visited_file_name) ? Qlambda : Qt, |
5472 | Qnil, Qnil); | |
570d7624 JB |
5473 | } |
5474 | ||
27e498e6 PE |
5475 | struct auto_save_unwind |
5476 | { | |
5477 | FILE *stream; | |
5478 | bool auto_raise; | |
5479 | }; | |
410ed5c3 | 5480 | |
27e498e6 PE |
5481 | static void |
5482 | do_auto_save_unwind (void *arg) | |
e54d3b5d | 5483 | { |
27e498e6 PE |
5484 | struct auto_save_unwind *p = arg; |
5485 | FILE *stream = p->stream; | |
5486 | minibuffer_auto_raise = p->auto_raise; | |
3be3c08e | 5487 | auto_saving = 0; |
fff7e982 | 5488 | if (stream != NULL) |
aab12958 | 5489 | { |
4d7e6e51 | 5490 | block_input (); |
aab12958 | 5491 | fclose (stream); |
4d7e6e51 | 5492 | unblock_input (); |
aab12958 | 5493 | } |
a8c828be RS |
5494 | } |
5495 | ||
5794dd61 | 5496 | static Lisp_Object |
971de7fb | 5497 | do_auto_save_make_dir (Lisp_Object dir) |
5794dd61 | 5498 | { |
09450bae | 5499 | Lisp_Object result; |
26816cbf | 5500 | |
09450bae PE |
5501 | auto_saving_dir_umask = 077; |
5502 | result = call2 (Qmake_directory, dir, Qt); | |
5503 | auto_saving_dir_umask = 0; | |
5504 | return result; | |
5794dd61 RS |
5505 | } |
5506 | ||
5507 | static Lisp_Object | |
971de7fb | 5508 | do_auto_save_eh (Lisp_Object ignore) |
5794dd61 | 5509 | { |
09450bae | 5510 | auto_saving_dir_umask = 0; |
5794dd61 RS |
5511 | return Qnil; |
5512 | } | |
5513 | ||
a7ca3326 | 5514 | DEFUN ("do-auto-save", Fdo_auto_save, Sdo_auto_save, 0, 2, "", |
8c1a1077 PJ |
5515 | doc: /* Auto-save all buffers that need it. |
5516 | This is all buffers that have auto-saving enabled | |
5517 | and are changed since last auto-saved. | |
5518 | Auto-saving writes the buffer into a file | |
5519 | so that your editing is not lost if the system crashes. | |
5520 | This file is not the file you visited; that changes only when you save. | |
5521 | Normally we run the normal hook `auto-save-hook' before saving. | |
5522 | ||
5523 | A non-nil NO-MESSAGE argument means do not print any message if successful. | |
5524 | A non-nil CURRENT-ONLY argument means save only current buffer. */) | |
5842a27b | 5525 | (Lisp_Object no_message, Lisp_Object current_only) |
570d7624 JB |
5526 | { |
5527 | struct buffer *old = current_buffer, *b; | |
dee091a3 | 5528 | Lisp_Object tail, buf, hook; |
f75d7a91 | 5529 | bool auto_saved = 0; |
f14b1c68 | 5530 | int do_handled_files; |
ff4c9993 | 5531 | Lisp_Object oquit; |
fff7e982 | 5532 | FILE *stream = NULL; |
d311d28c | 5533 | ptrdiff_t count = SPECPDL_INDEX (); |
f75d7a91 | 5534 | bool orig_minibuffer_auto_raise = minibuffer_auto_raise; |
fce31d69 | 5535 | bool old_message_p = 0; |
27e498e6 | 5536 | struct auto_save_unwind auto_save_unwind; |
d57563b6 | 5537 | struct gcpro gcpro1, gcpro2; |
38da540d RS |
5538 | |
5539 | if (max_specpdl_size < specpdl_size + 40) | |
5540 | max_specpdl_size = specpdl_size + 40; | |
5541 | ||
5542 | if (minibuf_level) | |
5543 | no_message = Qt; | |
5544 | ||
5794dd61 RS |
5545 | if (NILP (no_message)) |
5546 | { | |
5547 | old_message_p = push_message (); | |
27e498e6 | 5548 | record_unwind_protect_void (pop_message_unwind); |
5794dd61 | 5549 | } |
efdc16c9 | 5550 | |
ff4c9993 RS |
5551 | /* Ordinarily don't quit within this function, |
5552 | but don't make it impossible to quit (in case we get hung in I/O). */ | |
5553 | oquit = Vquit_flag; | |
5554 | Vquit_flag = Qnil; | |
570d7624 JB |
5555 | |
5556 | /* No GCPRO needed, because (when it matters) all Lisp_Object variables | |
5557 | point to non-strings reached from Vbuffer_alist. */ | |
5558 | ||
dee091a3 | 5559 | hook = intern ("auto-save-hook"); |
afbfe143 | 5560 | safe_run_hooks (hook); |
570d7624 | 5561 | |
e54d3b5d RS |
5562 | if (STRINGP (Vauto_save_list_file_name)) |
5563 | { | |
0894672f | 5564 | Lisp_Object listfile; |
efdc16c9 | 5565 | |
258fd2cb | 5566 | listfile = Fexpand_file_name (Vauto_save_list_file_name, Qnil); |
0894672f GM |
5567 | |
5568 | /* Don't try to create the directory when shutting down Emacs, | |
5569 | because creating the directory might signal an error, and | |
5570 | that would leave Emacs in a strange state. */ | |
5571 | if (!NILP (Vrun_hooks)) | |
5572 | { | |
5573 | Lisp_Object dir; | |
d57563b6 RS |
5574 | dir = Qnil; |
5575 | GCPRO2 (dir, listfile); | |
0894672f GM |
5576 | dir = Ffile_name_directory (listfile); |
5577 | if (NILP (Ffile_directory_p (dir))) | |
5794dd61 | 5578 | internal_condition_case_1 (do_auto_save_make_dir, |
09450bae | 5579 | dir, Qt, |
5794dd61 | 5580 | do_auto_save_eh); |
d57563b6 | 5581 | UNGCPRO; |
0894672f | 5582 | } |
efdc16c9 | 5583 | |
406af475 | 5584 | stream = emacs_fopen (SSDATA (listfile), "w"); |
1b335d29 | 5585 | } |
199607e4 | 5586 | |
27e498e6 PE |
5587 | auto_save_unwind.stream = stream; |
5588 | auto_save_unwind.auto_raise = minibuffer_auto_raise; | |
5589 | record_unwind_protect_ptr (do_auto_save_unwind, &auto_save_unwind); | |
a8c828be | 5590 | minibuffer_auto_raise = 0; |
3be3c08e | 5591 | auto_saving = 1; |
ca730bf0 | 5592 | auto_save_error_occurred = 0; |
3be3c08e | 5593 | |
6b61353c KH |
5594 | /* On first pass, save all files that don't have handlers. |
5595 | On second pass, save all files that do have handlers. | |
5596 | ||
5597 | If Emacs is crashing, the handlers may tweak what is causing | |
5598 | Emacs to crash in the first place, and it would be a shame if | |
5599 | Emacs failed to autosave perfectly ordinary files because it | |
5600 | couldn't handle some ange-ftp'd file. */ | |
5601 | ||
f14b1c68 | 5602 | for (do_handled_files = 0; do_handled_files < 2; do_handled_files++) |
8f3a2c26 | 5603 | FOR_EACH_LIVE_BUFFER (tail, buf) |
f14b1c68 | 5604 | { |
f14b1c68 | 5605 | b = XBUFFER (buf); |
199607e4 | 5606 | |
e54d3b5d | 5607 | /* Record all the buffers that have auto save mode |
258fd2cb RS |
5608 | in the special file that lists them. For each of these buffers, |
5609 | Record visited name (if any) and auto save name. */ | |
4b4deea2 | 5610 | if (STRINGP (BVAR (b, auto_save_file_name)) |
1b335d29 | 5611 | && stream != NULL && do_handled_files == 0) |
e54d3b5d | 5612 | { |
4d7e6e51 | 5613 | block_input (); |
4b4deea2 | 5614 | if (!NILP (BVAR (b, filename))) |
258fd2cb | 5615 | { |
4b4deea2 TT |
5616 | fwrite (SDATA (BVAR (b, filename)), 1, |
5617 | SBYTES (BVAR (b, filename)), stream); | |
258fd2cb | 5618 | } |
1b335d29 | 5619 | putc ('\n', stream); |
4b4deea2 TT |
5620 | fwrite (SDATA (BVAR (b, auto_save_file_name)), 1, |
5621 | SBYTES (BVAR (b, auto_save_file_name)), stream); | |
1b335d29 | 5622 | putc ('\n', stream); |
4d7e6e51 | 5623 | unblock_input (); |
e54d3b5d | 5624 | } |
17857782 | 5625 | |
f14b1c68 JB |
5626 | if (!NILP (current_only) |
5627 | && b != current_buffer) | |
5628 | continue; | |
e54d3b5d | 5629 | |
95385625 RS |
5630 | /* Don't auto-save indirect buffers. |
5631 | The base buffer takes care of it. */ | |
5632 | if (b->base_buffer) | |
5633 | continue; | |
5634 | ||
f14b1c68 JB |
5635 | /* Check for auto save enabled |
5636 | and file changed since last auto save | |
5637 | and file changed since last real save. */ | |
4b4deea2 | 5638 | if (STRINGP (BVAR (b, auto_save_file_name)) |
95385625 | 5639 | && BUF_SAVE_MODIFF (b) < BUF_MODIFF (b) |
0b5397c2 | 5640 | && BUF_AUTOSAVE_MODIFF (b) < BUF_MODIFF (b) |
82c2d839 | 5641 | /* -1 means we've turned off autosaving for a while--see below. */ |
4b4deea2 | 5642 | && XINT (BVAR (b, save_length)) >= 0 |
f14b1c68 | 5643 | && (do_handled_files |
4b4deea2 | 5644 | || NILP (Ffind_file_name_handler (BVAR (b, auto_save_file_name), |
49307295 | 5645 | Qwrite_region)))) |
f14b1c68 | 5646 | { |
43aac990 PE |
5647 | struct timespec before_time = current_timespec (); |
5648 | struct timespec after_time; | |
b60247d9 RS |
5649 | |
5650 | /* If we had a failure, don't try again for 20 minutes. */ | |
d311d28c | 5651 | if (b->auto_save_failure_time > 0 |
43aac990 | 5652 | && before_time.tv_sec - b->auto_save_failure_time < 1200) |
b60247d9 RS |
5653 | continue; |
5654 | ||
090101cf CY |
5655 | set_buffer_internal (b); |
5656 | if (NILP (Vauto_save_include_big_deletions) | |
4b4deea2 | 5657 | && (XFASTINT (BVAR (b, save_length)) * 10 |
4be941e3 | 5658 | > (BUF_Z (b) - BUF_BEG (b)) * 13) |
f14b1c68 JB |
5659 | /* A short file is likely to change a large fraction; |
5660 | spare the user annoying messages. */ | |
4b4deea2 | 5661 | && XFASTINT (BVAR (b, save_length)) > 5000 |
f14b1c68 | 5662 | /* These messages are frequent and annoying for `*mail*'. */ |
4b4deea2 | 5663 | && !EQ (BVAR (b, filename), Qnil) |
f14b1c68 JB |
5664 | && NILP (no_message)) |
5665 | { | |
5666 | /* It has shrunk too much; turn off auto-saving here. */ | |
a8c828be | 5667 | minibuffer_auto_raise = orig_minibuffer_auto_raise; |
fd91d0d4 | 5668 | message_with_string ("Buffer %s has shrunk a lot; auto save disabled in that buffer until next real save", |
4b4deea2 | 5669 | BVAR (b, name), 1); |
a8c828be | 5670 | minibuffer_auto_raise = 0; |
82c2d839 RS |
5671 | /* Turn off auto-saving until there's a real save, |
5672 | and prevent any more warnings. */ | |
4b4deea2 | 5673 | XSETINT (BVAR (b, save_length), -1); |
f14b1c68 JB |
5674 | Fsleep_for (make_number (1), Qnil); |
5675 | continue; | |
5676 | } | |
f14b1c68 JB |
5677 | if (!auto_saved && NILP (no_message)) |
5678 | message1 ("Auto-saving..."); | |
5679 | internal_condition_case (auto_save_1, Qt, auto_save_error); | |
f75d7a91 | 5680 | auto_saved = 1; |
0b5397c2 | 5681 | BUF_AUTOSAVE_MODIFF (b) = BUF_MODIFF (b); |
4b4deea2 | 5682 | XSETFASTINT (BVAR (current_buffer, save_length), Z - BEG); |
f14b1c68 | 5683 | set_buffer_internal (old); |
b60247d9 | 5684 | |
43aac990 | 5685 | after_time = current_timespec (); |
b60247d9 RS |
5686 | |
5687 | /* If auto-save took more than 60 seconds, | |
5688 | assume it was an NFS failure that got a timeout. */ | |
43aac990 PE |
5689 | if (after_time.tv_sec - before_time.tv_sec > 60) |
5690 | b->auto_save_failure_time = after_time.tv_sec; | |
f14b1c68 JB |
5691 | } |
5692 | } | |
570d7624 | 5693 | |
b67f2ca5 RS |
5694 | /* Prevent another auto save till enough input events come in. */ |
5695 | record_auto_save (); | |
570d7624 | 5696 | |
17857782 | 5697 | if (auto_saved && NILP (no_message)) |
f05b275b | 5698 | { |
5794dd61 | 5699 | if (old_message_p) |
31f3d831 | 5700 | { |
5794dd61 RS |
5701 | /* If we are going to restore an old message, |
5702 | give time to read ours. */ | |
83f8d903 | 5703 | sit_for (make_number (1), 0, 0); |
c71106e5 | 5704 | restore_message (); |
31f3d831 | 5705 | } |
ca730bf0 | 5706 | else if (!auto_save_error_occurred) |
31e31a15 CY |
5707 | /* Don't overwrite the error message if an error occurred. |
5708 | If we displayed a message and then restored a state | |
5794dd61 | 5709 | with no message, leave a "done" message on the screen. */ |
f05b275b KH |
5710 | message1 ("Auto-saving...done"); |
5711 | } | |
570d7624 | 5712 | |
ff4c9993 RS |
5713 | Vquit_flag = oquit; |
5714 | ||
5794dd61 | 5715 | /* This restores the message-stack status. */ |
e54d3b5d | 5716 | unbind_to (count, Qnil); |
570d7624 JB |
5717 | return Qnil; |
5718 | } | |
5719 | ||
5720 | DEFUN ("set-buffer-auto-saved", Fset_buffer_auto_saved, | |
8c1a1077 PJ |
5721 | Sset_buffer_auto_saved, 0, 0, 0, |
5722 | doc: /* Mark current buffer as auto-saved with its current text. | |
5723 | No auto-save file will be written until the buffer changes again. */) | |
5842a27b | 5724 | (void) |
570d7624 | 5725 | { |
0b5397c2 SM |
5726 | /* FIXME: This should not be called in indirect buffers, since |
5727 | they're not autosaved. */ | |
5728 | BUF_AUTOSAVE_MODIFF (current_buffer) = MODIFF; | |
4b4deea2 | 5729 | XSETFASTINT (BVAR (current_buffer, save_length), Z - BEG); |
d311d28c | 5730 | current_buffer->auto_save_failure_time = 0; |
b60247d9 RS |
5731 | return Qnil; |
5732 | } | |
5733 | ||
5734 | DEFUN ("clear-buffer-auto-save-failure", Fclear_buffer_auto_save_failure, | |
8c1a1077 PJ |
5735 | Sclear_buffer_auto_save_failure, 0, 0, 0, |
5736 | doc: /* Clear any record of a recent auto-save failure in the current buffer. */) | |
5842a27b | 5737 | (void) |
b60247d9 | 5738 | { |
d311d28c | 5739 | current_buffer->auto_save_failure_time = 0; |
570d7624 JB |
5740 | return Qnil; |
5741 | } | |
5742 | ||
5743 | DEFUN ("recent-auto-save-p", Frecent_auto_save_p, Srecent_auto_save_p, | |
8c1a1077 | 5744 | 0, 0, 0, |
68780e2a RS |
5745 | doc: /* Return t if current buffer has been auto-saved recently. |
5746 | More precisely, if it has been auto-saved since last read from or saved | |
5747 | in the visited file. If the buffer has no visited file, | |
5748 | then any auto-save counts as "recent". */) | |
5842a27b | 5749 | (void) |
570d7624 | 5750 | { |
0b5397c2 SM |
5751 | /* FIXME: maybe we should return nil for indirect buffers since |
5752 | they're never autosaved. */ | |
5753 | return (SAVE_MODIFF < BUF_AUTOSAVE_MODIFF (current_buffer) ? Qt : Qnil); | |
570d7624 JB |
5754 | } |
5755 | \f | |
5756 | /* Reading and completing file names */ | |
6e710ae5 | 5757 | |
88208bb8 JD |
5758 | DEFUN ("next-read-file-uses-dialog-p", Fnext_read_file_uses_dialog_p, |
5759 | Snext_read_file_uses_dialog_p, 0, 0, 0, | |
5760 | doc: /* Return t if a call to `read-file-name' will use a dialog. | |
5761 | The return value is only relevant for a call to `read-file-name' that happens | |
1a0de25c | 5762 | before any other event (mouse or keypress) is handled. */) |
5842a27b | 5763 | (void) |
88208bb8 | 5764 | { |
d7e642cc JD |
5765 | #if defined (USE_MOTIF) || defined (HAVE_NTGUI) || defined (USE_GTK) \ |
5766 | || defined (HAVE_NS) | |
88208bb8 JD |
5767 | if ((NILP (last_nonmenu_event) || CONSP (last_nonmenu_event)) |
5768 | && use_dialog_box | |
5769 | && use_file_dialog | |
7452b7bd | 5770 | && window_system_available (SELECTED_FRAME ())) |
88208bb8 JD |
5771 | return Qt; |
5772 | #endif | |
5773 | return Qnil; | |
5774 | } | |
d4a42098 | 5775 | |
dbd50d4b | 5776 | Lisp_Object |
971de7fb | 5777 | Fread_file_name (Lisp_Object prompt, Lisp_Object dir, Lisp_Object default_filename, Lisp_Object mustmatch, Lisp_Object initial, Lisp_Object predicate) |
570d7624 | 5778 | { |
fd4ead52 | 5779 | struct gcpro gcpro1; |
dbd50d4b | 5780 | Lisp_Object args[7]; |
a79485af | 5781 | |
71e1f69d | 5782 | GCPRO1 (default_filename); |
dbd50d4b SM |
5783 | args[0] = intern ("read-file-name"); |
5784 | args[1] = prompt; | |
5785 | args[2] = dir; | |
5786 | args[3] = default_filename; | |
5787 | args[4] = mustmatch; | |
5788 | args[5] = initial; | |
5789 | args[6] = predicate; | |
5790 | RETURN_UNGCPRO (Ffuncall (7, args)); | |
570d7624 | 5791 | } |
9c856db9 | 5792 | |
570d7624 | 5793 | \f |
9fe43ff6 PE |
5794 | void |
5795 | init_fileio (void) | |
5796 | { | |
a560b856 PE |
5797 | realmask = umask (0); |
5798 | umask (realmask); | |
5799 | ||
9fe43ff6 | 5800 | valid_timestamp_file_system = 0; |
1db72ad3 RF |
5801 | |
5802 | /* fsync can be a significant performance hit. Often it doesn't | |
5803 | suffice to make the file-save operation survive a crash. For | |
5804 | batch scripts, which are typically part of larger shell commands | |
5805 | that don't fsync other files, its effect on performance can be | |
5806 | significant so its utility is particularly questionable. | |
5807 | Hence, for now by default fsync is used only when interactive. | |
5808 | ||
5809 | For more on why fsync often fails to work on today's hardware, see: | |
5810 | Zheng M et al. Understanding the robustness of SSDs under power fault. | |
5811 | 11th USENIX Conf. on File and Storage Technologies, 2013 (FAST '13), 271-84 | |
5812 | http://www.usenix.org/system/files/conference/fast13/fast13-final80.pdf | |
5813 | ||
5814 | For more on why fsync does not suffice even if it works properly, see: | |
5815 | Roche X. Necessary step(s) to synchronize filename operations on disk. | |
5816 | Austin Group Defect 672, 2013-03-19 | |
5817 | http://austingroupbugs.net/view.php?id=672 */ | |
5818 | write_region_inhibit_fsync = noninteractive; | |
9fe43ff6 PE |
5819 | } |
5820 | ||
dfcf069d | 5821 | void |
971de7fb | 5822 | syms_of_fileio (void) |
570d7624 | 5823 | { |
cd3520a4 JB |
5824 | DEFSYM (Qoperations, "operations"); |
5825 | DEFSYM (Qexpand_file_name, "expand-file-name"); | |
5826 | DEFSYM (Qsubstitute_in_file_name, "substitute-in-file-name"); | |
5827 | DEFSYM (Qdirectory_file_name, "directory-file-name"); | |
5828 | DEFSYM (Qfile_name_directory, "file-name-directory"); | |
5829 | DEFSYM (Qfile_name_nondirectory, "file-name-nondirectory"); | |
5830 | DEFSYM (Qunhandled_file_name_directory, "unhandled-file-name-directory"); | |
5831 | DEFSYM (Qfile_name_as_directory, "file-name-as-directory"); | |
5832 | DEFSYM (Qcopy_file, "copy-file"); | |
5833 | DEFSYM (Qmake_directory_internal, "make-directory-internal"); | |
5834 | DEFSYM (Qmake_directory, "make-directory"); | |
5835 | DEFSYM (Qdelete_directory_internal, "delete-directory-internal"); | |
5836 | DEFSYM (Qdelete_file, "delete-file"); | |
5837 | DEFSYM (Qrename_file, "rename-file"); | |
5838 | DEFSYM (Qadd_name_to_file, "add-name-to-file"); | |
5839 | DEFSYM (Qmake_symbolic_link, "make-symbolic-link"); | |
5840 | DEFSYM (Qfile_exists_p, "file-exists-p"); | |
5841 | DEFSYM (Qfile_executable_p, "file-executable-p"); | |
5842 | DEFSYM (Qfile_readable_p, "file-readable-p"); | |
5843 | DEFSYM (Qfile_writable_p, "file-writable-p"); | |
5844 | DEFSYM (Qfile_symlink_p, "file-symlink-p"); | |
5845 | DEFSYM (Qaccess_file, "access-file"); | |
5846 | DEFSYM (Qfile_directory_p, "file-directory-p"); | |
5847 | DEFSYM (Qfile_regular_p, "file-regular-p"); | |
5848 | DEFSYM (Qfile_accessible_directory_p, "file-accessible-directory-p"); | |
5849 | DEFSYM (Qfile_modes, "file-modes"); | |
5850 | DEFSYM (Qset_file_modes, "set-file-modes"); | |
5851 | DEFSYM (Qset_file_times, "set-file-times"); | |
5852 | DEFSYM (Qfile_selinux_context, "file-selinux-context"); | |
5853 | DEFSYM (Qset_file_selinux_context, "set-file-selinux-context"); | |
7c3d167f RF |
5854 | DEFSYM (Qfile_acl, "file-acl"); |
5855 | DEFSYM (Qset_file_acl, "set-file-acl"); | |
cd3520a4 JB |
5856 | DEFSYM (Qfile_newer_than_file_p, "file-newer-than-file-p"); |
5857 | DEFSYM (Qinsert_file_contents, "insert-file-contents"); | |
9dbda100 | 5858 | DEFSYM (Qchoose_write_coding_system, "choose-write-coding-system"); |
cd3520a4 JB |
5859 | DEFSYM (Qwrite_region, "write-region"); |
5860 | DEFSYM (Qverify_visited_file_modtime, "verify-visited-file-modtime"); | |
5861 | DEFSYM (Qset_visited_file_modtime, "set-visited-file-modtime"); | |
5862 | DEFSYM (Qauto_save_coding, "auto-save-coding"); | |
5863 | ||
5864 | DEFSYM (Qfile_name_history, "file-name-history"); | |
642ef245 | 5865 | Fset (Qfile_name_history, Qnil); |
15c65264 | 5866 | |
cd3520a4 JB |
5867 | DEFSYM (Qfile_error, "file-error"); |
5868 | DEFSYM (Qfile_already_exists, "file-already-exists"); | |
5869 | DEFSYM (Qfile_date_error, "file-date-error"); | |
86dfb7a8 | 5870 | DEFSYM (Qfile_notify_error, "file-notify-error"); |
cd3520a4 | 5871 | DEFSYM (Qexcl, "excl"); |
570d7624 | 5872 | |
29208e82 | 5873 | DEFVAR_LISP ("file-name-coding-system", Vfile_name_coding_system, |
fb7ada5f | 5874 | doc: /* Coding system for encoding file names. |
7df14908 EZ |
5875 | If it is nil, `default-file-name-coding-system' (which see) is used. |
5876 | ||
5877 | On MS-Windows, the value of this variable is largely ignored if | |
6630df25 EZ |
5878 | \`w32-unicode-filenames' (which see) is non-nil. Emacs on Windows |
5879 | behaves as if file names were encoded in `utf-8'. */); | |
b1d1b865 RS |
5880 | Vfile_name_coding_system = Qnil; |
5881 | ||
cd913586 | 5882 | DEFVAR_LISP ("default-file-name-coding-system", |
29208e82 | 5883 | Vdefault_file_name_coding_system, |
8c1a1077 | 5884 | doc: /* Default coding system for encoding file names. |
346ebf53 | 5885 | This variable is used only when `file-name-coding-system' is nil. |
8c1a1077 | 5886 | |
346ebf53 | 5887 | This variable is set/changed by the command `set-language-environment'. |
8c1a1077 | 5888 | User should not set this variable manually, |
346ebf53 | 5889 | instead use `file-name-coding-system' to get a constant encoding |
7df14908 EZ |
5890 | of file names regardless of the current language environment. |
5891 | ||
5892 | On MS-Windows, the value of this variable is largely ignored if | |
6630df25 EZ |
5893 | \`w32-unicode-filenames' (which see) is non-nil. Emacs on Windows |
5894 | behaves as if file names were encoded in `utf-8'. */); | |
cd913586 KH |
5895 | Vdefault_file_name_coding_system = Qnil; |
5896 | ||
cd3520a4 JB |
5897 | DEFSYM (Qformat_decode, "format-decode"); |
5898 | DEFSYM (Qformat_annotate_function, "format-annotate-function"); | |
5899 | DEFSYM (Qafter_insert_file_set_coding, "after-insert-file-set-coding"); | |
5900 | DEFSYM (Qcar_less_than_car, "car-less-than-car"); | |
d6a3cc15 | 5901 | |
570d7624 | 5902 | Fput (Qfile_error, Qerror_conditions, |
d67b4f80 | 5903 | Fpurecopy (list2 (Qfile_error, Qerror))); |
570d7624 | 5904 | Fput (Qfile_error, Qerror_message, |
2a0213a6 | 5905 | build_pure_c_string ("File error")); |
570d7624 JB |
5906 | |
5907 | Fput (Qfile_already_exists, Qerror_conditions, | |
d67b4f80 | 5908 | Fpurecopy (list3 (Qfile_already_exists, Qfile_error, Qerror))); |
570d7624 | 5909 | Fput (Qfile_already_exists, Qerror_message, |
2a0213a6 | 5910 | build_pure_c_string ("File already exists")); |
570d7624 | 5911 | |
c0b7b21c | 5912 | Fput (Qfile_date_error, Qerror_conditions, |
d67b4f80 | 5913 | Fpurecopy (list3 (Qfile_date_error, Qfile_error, Qerror))); |
c0b7b21c | 5914 | Fput (Qfile_date_error, Qerror_message, |
2a0213a6 | 5915 | build_pure_c_string ("Cannot set file date")); |
c0b7b21c | 5916 | |
86dfb7a8 MA |
5917 | Fput (Qfile_notify_error, Qerror_conditions, |
5918 | Fpurecopy (list3 (Qfile_notify_error, Qfile_error, Qerror))); | |
5919 | Fput (Qfile_notify_error, Qerror_message, | |
5920 | build_pure_c_string ("File notification error")); | |
5921 | ||
29208e82 | 5922 | DEFVAR_LISP ("file-name-handler-alist", Vfile_name_handler_alist, |
a59225b1 CY |
5923 | doc: /* Alist of elements (REGEXP . HANDLER) for file names handled specially. |
5924 | If a file name matches REGEXP, all I/O on that file is done by calling | |
5925 | HANDLER. If a file name matches more than one handler, the handler | |
5926 | whose match starts last in the file name gets precedence. The | |
5927 | function `find-file-name-handler' checks this list for a handler for | |
5928 | its argument. | |
5929 | ||
5930 | HANDLER should be a function. The first argument given to it is the | |
5931 | name of the I/O primitive to be handled; the remaining arguments are | |
5932 | the arguments that were passed to that primitive. For example, if you | |
5933 | do (file-exists-p FILENAME) and FILENAME is handled by HANDLER, then | |
5934 | HANDLER is called like this: | |
5935 | ||
5936 | (funcall HANDLER 'file-exists-p FILENAME) | |
5937 | ||
5938 | Note that HANDLER must be able to handle all I/O primitives; if it has | |
5939 | nothing special to do for a primitive, it should reinvoke the | |
5940 | primitive to handle the operation \"the usual way\". | |
5941 | See Info node `(elisp)Magic File Names' for more details. */); | |
09121adc RS |
5942 | Vfile_name_handler_alist = Qnil; |
5943 | ||
0414b394 | 5944 | DEFVAR_LISP ("set-auto-coding-function", |
29208e82 | 5945 | Vset_auto_coding_function, |
8c1a1077 PJ |
5946 | doc: /* If non-nil, a function to call to decide a coding system of file. |
5947 | Two arguments are passed to this function: the file name | |
5948 | and the length of a file contents following the point. | |
5949 | This function should return a coding system to decode the file contents. | |
5950 | It should check the file name against `auto-coding-alist'. | |
5951 | If no coding system is decided, it should check a coding system | |
5952 | specified in the heading lines with the format: | |
5953 | -*- ... coding: CODING-SYSTEM; ... -*- | |
5954 | or local variable spec of the tailing lines with `coding:' tag. */); | |
0414b394 | 5955 | Vset_auto_coding_function = Qnil; |
c9e82392 | 5956 | |
29208e82 | 5957 | DEFVAR_LISP ("after-insert-file-functions", Vafter_insert_file_functions, |
8c1a1077 | 5958 | doc: /* A list of functions to be called at the end of `insert-file-contents'. |
0cf9f5b5 RS |
5959 | Each is passed one argument, the number of characters inserted, |
5960 | with point at the start of the inserted text. Each function | |
5961 | should leave point the same, and return the new character count. | |
cf6d2357 RS |
5962 | If `insert-file-contents' is intercepted by a handler from |
5963 | `file-name-handler-alist', that handler is responsible for calling the | |
5964 | functions in `after-insert-file-functions' if appropriate. */); | |
d6a3cc15 RS |
5965 | Vafter_insert_file_functions = Qnil; |
5966 | ||
29208e82 | 5967 | DEFVAR_LISP ("write-region-annotate-functions", Vwrite_region_annotate_functions, |
8c1a1077 PJ |
5968 | doc: /* A list of functions to be called at the start of `write-region'. |
5969 | Each is passed two arguments, START and END as for `write-region'. | |
5970 | These are usually two numbers but not always; see the documentation | |
5971 | for `write-region'. The function should return a list of pairs | |
5972 | of the form (POSITION . STRING), consisting of strings to be effectively | |
5973 | inserted at the specified positions of the file being written (1 means to | |
5974 | insert before the first byte written). The POSITIONs must be sorted into | |
67fbc0cb CY |
5975 | increasing order. |
5976 | ||
5977 | If there are several annotation functions, the lists returned by these | |
5978 | functions are merged destructively. As each annotation function runs, | |
5979 | the variable `write-region-annotations-so-far' contains a list of all | |
5980 | annotations returned by previous annotation functions. | |
5981 | ||
5982 | An annotation function can return with a different buffer current. | |
5983 | Doing so removes the annotations returned by previous functions, and | |
5984 | resets START and END to `point-min' and `point-max' of the new buffer. | |
5985 | ||
5986 | After `write-region' completes, Emacs calls the function stored in | |
5987 | `write-region-post-annotation-function', once for each buffer that was | |
5988 | current when building the annotations (i.e., at least once), with that | |
5989 | buffer current. */); | |
d6a3cc15 | 5990 | Vwrite_region_annotate_functions = Qnil; |
cd3520a4 | 5991 | DEFSYM (Qwrite_region_annotate_functions, "write-region-annotate-functions"); |
d6a3cc15 | 5992 | |
67fbc0cb | 5993 | DEFVAR_LISP ("write-region-post-annotation-function", |
29208e82 | 5994 | Vwrite_region_post_annotation_function, |
67fbc0cb CY |
5995 | doc: /* Function to call after `write-region' completes. |
5996 | The function is called with no arguments. If one or more of the | |
5997 | annotation functions in `write-region-annotate-functions' changed the | |
5998 | current buffer, the function stored in this variable is called for | |
5999 | each of those additional buffers as well, in addition to the original | |
6000 | buffer. The relevant buffer is current during each function call. */); | |
6001 | Vwrite_region_post_annotation_function = Qnil; | |
6002 | staticpro (&Vwrite_region_annotation_buffers); | |
6003 | ||
6fc6f94b | 6004 | DEFVAR_LISP ("write-region-annotations-so-far", |
29208e82 | 6005 | Vwrite_region_annotations_so_far, |
8c1a1077 PJ |
6006 | doc: /* When an annotation function is called, this holds the previous annotations. |
6007 | These are the annotations made by other annotation functions | |
6008 | that were already called. See also `write-region-annotate-functions'. */); | |
6fc6f94b RS |
6009 | Vwrite_region_annotations_so_far = Qnil; |
6010 | ||
29208e82 | 6011 | DEFVAR_LISP ("inhibit-file-name-handlers", Vinhibit_file_name_handlers, |
8c1a1077 PJ |
6012 | doc: /* A list of file name handlers that temporarily should not be used. |
6013 | This applies only to the operation `inhibit-file-name-operation'. */); | |
82c2d839 RS |
6014 | Vinhibit_file_name_handlers = Qnil; |
6015 | ||
29208e82 | 6016 | DEFVAR_LISP ("inhibit-file-name-operation", Vinhibit_file_name_operation, |
8c1a1077 | 6017 | doc: /* The operation for which `inhibit-file-name-handlers' is applicable. */); |
a65970a0 RS |
6018 | Vinhibit_file_name_operation = Qnil; |
6019 | ||
29208e82 | 6020 | DEFVAR_LISP ("auto-save-list-file-name", Vauto_save_list_file_name, |
8c1a1077 PJ |
6021 | doc: /* File name in which we write a list of all auto save file names. |
6022 | This variable is initialized automatically from `auto-save-list-file-prefix' | |
a2458031 | 6023 | shortly after Emacs reads your init file, if you have not yet given it |
8c1a1077 | 6024 | a non-nil value. */); |
e54d3b5d RS |
6025 | Vauto_save_list_file_name = Qnil; |
6026 | ||
29208e82 | 6027 | DEFVAR_LISP ("auto-save-visited-file-name", Vauto_save_visited_file_name, |
699b53bc CY |
6028 | doc: /* Non-nil says auto-save a buffer in the file it is visiting, when practical. |
6029 | Normally auto-save files are written under other names. */); | |
6030 | Vauto_save_visited_file_name = Qnil; | |
6031 | ||
29208e82 | 6032 | DEFVAR_LISP ("auto-save-include-big-deletions", Vauto_save_include_big_deletions, |
090101cf CY |
6033 | doc: /* If non-nil, auto-save even if a large part of the text is deleted. |
6034 | If nil, deleting a substantial portion of the text disables auto-save | |
6035 | in the buffer; this is the default behavior, because the auto-save | |
6036 | file is usually more useful if it contains the deleted text. */); | |
6037 | Vauto_save_include_big_deletions = Qnil; | |
6038 | ||
29208e82 | 6039 | DEFVAR_BOOL ("write-region-inhibit-fsync", write_region_inhibit_fsync, |
fb7ada5f | 6040 | doc: /* Non-nil means don't call fsync in `write-region'. |
e3f509dd | 6041 | This variable affects calls to `write-region' as well as save commands. |
cbee2131 PE |
6042 | Setting this to nil may avoid data loss if the system loses power or |
6043 | the operating system crashes. */); | |
1db72ad3 | 6044 | write_region_inhibit_fsync = 0; /* See also `init_fileio' above. */ |
ccf61795 | 6045 | |
29208e82 | 6046 | DEFVAR_BOOL ("delete-by-moving-to-trash", delete_by_moving_to_trash, |
6cf29fe8 | 6047 | doc: /* Specifies whether to use the system's trash can. |
f1a5d776 CY |
6048 | When non-nil, certain file deletion commands use the function |
6049 | `move-file-to-trash' instead of deleting files outright. | |
6050 | This includes interactive calls to `delete-file' and | |
6051 | `delete-directory' and the Dired deletion commands. */); | |
6cf29fe8 | 6052 | delete_by_moving_to_trash = 0; |
d67b4f80 | 6053 | Qdelete_by_moving_to_trash = intern_c_string ("delete-by-moving-to-trash"); |
cd3520a4 JB |
6054 | |
6055 | DEFSYM (Qmove_file_to_trash, "move-file-to-trash"); | |
6056 | DEFSYM (Qcopy_directory, "copy-directory"); | |
6057 | DEFSYM (Qdelete_directory, "delete-directory"); | |
ee041f2d | 6058 | DEFSYM (Qsubstitute_env_in_file_name, "substitute-env-in-file-name"); |
6cf29fe8 | 6059 | |
642ef245 | 6060 | defsubr (&Sfind_file_name_handler); |
570d7624 JB |
6061 | defsubr (&Sfile_name_directory); |
6062 | defsubr (&Sfile_name_nondirectory); | |
642ef245 | 6063 | defsubr (&Sunhandled_file_name_directory); |
570d7624 JB |
6064 | defsubr (&Sfile_name_as_directory); |
6065 | defsubr (&Sdirectory_file_name); | |
6066 | defsubr (&Smake_temp_name); | |
6067 | defsubr (&Sexpand_file_name); | |
6068 | defsubr (&Ssubstitute_in_file_name); | |
6069 | defsubr (&Scopy_file); | |
9bbe01fb | 6070 | defsubr (&Smake_directory_internal); |
9d8f3bd9 | 6071 | defsubr (&Sdelete_directory_internal); |
570d7624 JB |
6072 | defsubr (&Sdelete_file); |
6073 | defsubr (&Srename_file); | |
6074 | defsubr (&Sadd_name_to_file); | |
570d7624 | 6075 | defsubr (&Smake_symbolic_link); |
570d7624 JB |
6076 | defsubr (&Sfile_name_absolute_p); |
6077 | defsubr (&Sfile_exists_p); | |
6078 | defsubr (&Sfile_executable_p); | |
6079 | defsubr (&Sfile_readable_p); | |
6080 | defsubr (&Sfile_writable_p); | |
1f8653eb | 6081 | defsubr (&Saccess_file); |
570d7624 JB |
6082 | defsubr (&Sfile_symlink_p); |
6083 | defsubr (&Sfile_directory_p); | |
b72dea2a | 6084 | defsubr (&Sfile_accessible_directory_p); |
f793dc6c | 6085 | defsubr (&Sfile_regular_p); |
570d7624 JB |
6086 | defsubr (&Sfile_modes); |
6087 | defsubr (&Sset_file_modes); | |
819da85b | 6088 | defsubr (&Sset_file_times); |
574c05e2 | 6089 | defsubr (&Sfile_selinux_context); |
7c3d167f RF |
6090 | defsubr (&Sfile_acl); |
6091 | defsubr (&Sset_file_acl); | |
574c05e2 | 6092 | defsubr (&Sset_file_selinux_context); |
c24e9a53 RS |
6093 | defsubr (&Sset_default_file_modes); |
6094 | defsubr (&Sdefault_file_modes); | |
570d7624 JB |
6095 | defsubr (&Sfile_newer_than_file_p); |
6096 | defsubr (&Sinsert_file_contents); | |
9dbda100 | 6097 | defsubr (&Schoose_write_coding_system); |
570d7624 | 6098 | defsubr (&Swrite_region); |
d6a3cc15 | 6099 | defsubr (&Scar_less_than_car); |
570d7624 | 6100 | defsubr (&Sverify_visited_file_modtime); |
f5d5eccf | 6101 | defsubr (&Svisited_file_modtime); |
570d7624 JB |
6102 | defsubr (&Sset_visited_file_modtime); |
6103 | defsubr (&Sdo_auto_save); | |
6104 | defsubr (&Sset_buffer_auto_saved); | |
b60247d9 | 6105 | defsubr (&Sclear_buffer_auto_save_failure); |
570d7624 JB |
6106 | defsubr (&Srecent_auto_save_p); |
6107 | ||
88208bb8 | 6108 | defsubr (&Snext_read_file_uses_dialog_p); |
85ffea93 | 6109 | |
697c17a2 | 6110 | #ifdef HAVE_SYNC |
85ffea93 | 6111 | defsubr (&Sunix_sync); |
483a2e10 | 6112 | #endif |
570d7624 | 6113 | } |