Commit | Line | Data |
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570d7624 | 1 | /* File IO for GNU Emacs. |
e9bffc61 | 2 | |
ab422c4d | 3 | Copyright (C) 1985-1988, 1993-2013 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 | |
71873e2b | 98 | /* Nonzero umask during creation of auto-save directories. */ |
f75d7a91 | 99 | static mode_t auto_saving_dir_umask; |
09450bae | 100 | |
570d7624 | 101 | /* Set by auto_save_1 to mode of original file so Fwrite_region will create |
71873e2b | 102 | a new file with the same mode as the original. */ |
f75d7a91 | 103 | static mode_t auto_save_mode_bits; |
570d7624 | 104 | |
71873e2b | 105 | /* Set by auto_save_1 if an error occurred during the last auto-save. */ |
f75d7a91 | 106 | static bool auto_save_error_occurred; |
ca730bf0 | 107 | |
9fe43ff6 PE |
108 | /* If VALID_TIMESTAMP_FILE_SYSTEM, then TIMESTAMP_FILE_SYSTEM is the device |
109 | number of a file system where time stamps were observed to to work. */ | |
110 | static bool valid_timestamp_file_system; | |
111 | static dev_t timestamp_file_system; | |
112 | ||
356a6224 KH |
113 | /* The symbol bound to coding-system-for-read when |
114 | insert-file-contents is called for recovering a file. This is not | |
115 | an actual coding system name, but just an indicator to tell | |
116 | insert-file-contents to use `emacs-mule' with a special flag for | |
117 | auto saving and recovering a file. */ | |
955cbe7b | 118 | static Lisp_Object Qauto_save_coding; |
356a6224 | 119 | |
f6c9b683 RS |
120 | /* Property name of a file name handler, |
121 | which gives a list of operations it handles.. */ | |
955cbe7b | 122 | static Lisp_Object Qoperations; |
f6c9b683 | 123 | |
71873e2b | 124 | /* Lisp functions for translating file formats. */ |
955cbe7b | 125 | static Lisp_Object Qformat_decode, Qformat_annotate_function; |
0d420e88 | 126 | |
2080470e | 127 | /* Lisp function for setting buffer-file-coding-system and the |
b6426b03 | 128 | multibyteness of the current buffer after inserting a file. */ |
955cbe7b | 129 | static Lisp_Object Qafter_insert_file_set_coding; |
b6426b03 | 130 | |
955cbe7b | 131 | static Lisp_Object Qwrite_region_annotate_functions; |
67fbc0cb CY |
132 | /* Each time an annotation function changes the buffer, the new buffer |
133 | is added here. */ | |
5045092b | 134 | static Lisp_Object Vwrite_region_annotation_buffers; |
67fbc0cb | 135 | |
955cbe7b | 136 | static Lisp_Object Qdelete_by_moving_to_trash; |
d2b66acf | 137 | |
6cf29fe8 | 138 | /* Lisp function for moving files to trash. */ |
955cbe7b | 139 | static Lisp_Object Qmove_file_to_trash; |
6cf29fe8 | 140 | |
8719abec | 141 | /* Lisp function for recursively copying directories. */ |
955cbe7b | 142 | static Lisp_Object Qcopy_directory; |
8719abec CY |
143 | |
144 | /* Lisp function for recursively deleting directories. */ | |
955cbe7b | 145 | static Lisp_Object Qdelete_directory; |
8719abec | 146 | |
ee041f2d SM |
147 | static Lisp_Object Qsubstitute_env_in_file_name; |
148 | ||
86dfb7a8 | 149 | Lisp_Object Qfile_error, Qfile_notify_error; |
955cbe7b PE |
150 | static Lisp_Object Qfile_already_exists, Qfile_date_error; |
151 | static Lisp_Object Qexcl; | |
15c65264 RS |
152 | Lisp_Object Qfile_name_history; |
153 | ||
955cbe7b | 154 | static Lisp_Object Qcar_less_than_car; |
d6a3cc15 | 155 | |
f75d7a91 PE |
156 | static bool a_write (int, Lisp_Object, ptrdiff_t, ptrdiff_t, |
157 | Lisp_Object *, struct coding_system *); | |
158 | static bool e_write (int, Lisp_Object, ptrdiff_t, ptrdiff_t, | |
159 | struct coding_system *); | |
ce51c54c | 160 | |
ec7adf26 | 161 | \f |
3d798ba7 PE |
162 | /* Return true if FILENAME exists. */ |
163 | ||
164 | static bool | |
165 | check_existing (const char *filename) | |
166 | { | |
167 | return faccessat (AT_FDCWD, filename, F_OK, AT_EACCESS) == 0; | |
168 | } | |
169 | ||
170 | /* Return true if file FILENAME exists and can be executed. */ | |
171 | ||
172 | static bool | |
173 | check_executable (char *filename) | |
174 | { | |
175 | return faccessat (AT_FDCWD, filename, X_OK, AT_EACCESS) == 0; | |
176 | } | |
177 | ||
178 | /* Return true if file FILENAME exists and can be accessed | |
179 | according to AMODE, which should include W_OK. | |
180 | On failure, return false and set errno. */ | |
181 | ||
182 | static bool | |
183 | check_writable (const char *filename, int amode) | |
184 | { | |
185 | #ifdef MSDOS | |
186 | /* FIXME: an faccessat implementation should be added to the | |
187 | DOS/Windows ports and this #ifdef branch should be removed. */ | |
188 | struct stat st; | |
189 | if (stat (filename, &st) < 0) | |
190 | return 0; | |
191 | errno = EPERM; | |
192 | return (st.st_mode & S_IWRITE || S_ISDIR (st.st_mode)); | |
193 | #else /* not MSDOS */ | |
194 | bool res = faccessat (AT_FDCWD, filename, amode, AT_EACCESS) == 0; | |
195 | #ifdef CYGWIN | |
196 | /* faccessat may have returned failure because Cygwin couldn't | |
197 | determine the file's UID or GID; if so, we return success. */ | |
198 | if (!res) | |
199 | { | |
200 | int faccessat_errno = errno; | |
201 | struct stat st; | |
202 | if (stat (filename, &st) < 0) | |
203 | return 0; | |
204 | res = (st.st_uid == -1 || st.st_gid == -1); | |
205 | errno = faccessat_errno; | |
206 | } | |
207 | #endif /* CYGWIN */ | |
208 | return res; | |
209 | #endif /* not MSDOS */ | |
210 | } | |
211 | \f | |
a773ed9a | 212 | /* Signal a file-access failure. STRING describes the failure, |
a9757f6a PE |
213 | NAME the file involved, and ERRORNO the errno value. |
214 | ||
215 | If NAME is neither null nor a pair, package it up as a singleton | |
216 | list before reporting it; this saves report_file_errno's caller the | |
217 | trouble of preserving errno before calling list1. */ | |
a773ed9a | 218 | |
5d01d666 | 219 | void |
a9757f6a | 220 | report_file_errno (char const *string, Lisp_Object name, int errorno) |
570d7624 | 221 | { |
a9757f6a | 222 | Lisp_Object data = CONSP (name) || NILP (name) ? name : list1 (name); |
570d7624 | 223 | Lisp_Object errstring; |
d7259fdb | 224 | char *str; |
570d7624 | 225 | |
ca9c0567 | 226 | synchronize_system_messages_locale (); |
d7259fdb | 227 | str = strerror (errorno); |
d7ea76b4 | 228 | errstring = code_convert_string_norecord (build_unibyte_string (str), |
68c45bf0 PE |
229 | Vlocale_coding_system, 0); |
230 | ||
570d7624 | 231 | while (1) |
505ab9bc RS |
232 | switch (errorno) |
233 | { | |
234 | case EEXIST: | |
24b1ddad | 235 | xsignal (Qfile_already_exists, Fcons (errstring, data)); |
505ab9bc RS |
236 | break; |
237 | default: | |
238 | /* System error messages are capitalized. Downcase the initial | |
39824137 EZ |
239 | unless it is followed by a slash. (The slash case caters to |
240 | error messages that begin with "I/O" or, in German, "E/A".) */ | |
d5443ffd KH |
241 | if (STRING_MULTIBYTE (errstring) |
242 | && ! EQ (Faref (errstring, make_number (1)), make_number ('/'))) | |
6c0969ca KH |
243 | { |
244 | int c; | |
245 | ||
51b59d79 | 246 | str = SSDATA (errstring); |
5976c3fe | 247 | c = STRING_CHAR ((unsigned char *) str); |
5da9919f | 248 | Faset (errstring, make_number (0), make_number (downcase (c))); |
6c0969ca | 249 | } |
505ab9bc | 250 | |
24b1ddad | 251 | xsignal (Qfile_error, |
505ab9bc RS |
252 | Fcons (build_string (string), Fcons (errstring, data))); |
253 | } | |
570d7624 | 254 | } |
b5148e85 | 255 | |
a9757f6a | 256 | /* Signal a file-access failure that set errno. STRING describes the |
b648c163 PE |
257 | failure, NAME the file involved. When invoking this function, take |
258 | care to not use arguments such as build_string ("foo") that involve | |
259 | side effects that may set errno. */ | |
a9757f6a | 260 | |
a773ed9a | 261 | void |
a9757f6a | 262 | report_file_error (char const *string, Lisp_Object name) |
a773ed9a | 263 | { |
a9757f6a | 264 | report_file_errno (string, name, errno); |
a773ed9a PE |
265 | } |
266 | ||
27e498e6 PE |
267 | void |
268 | close_file_unwind (int fd) | |
b5148e85 | 269 | { |
a0931322 | 270 | emacs_close (fd); |
b5148e85 | 271 | } |
a1d2b64a | 272 | |
f4b1eb36 PE |
273 | void |
274 | fclose_unwind (void *arg) | |
275 | { | |
276 | FILE *stream = arg; | |
277 | fclose (stream); | |
278 | } | |
279 | ||
a1d2b64a RS |
280 | /* Restore point, having saved it as a marker. */ |
281 | ||
27e498e6 | 282 | void |
971de7fb | 283 | restore_point_unwind (Lisp_Object location) |
a1d2b64a | 284 | { |
ec7adf26 | 285 | Fgoto_char (location); |
bc923770 | 286 | unchain_marker (XMARKER (location)); |
a1d2b64a | 287 | } |
59c94f03 | 288 | |
570d7624 | 289 | \f |
955cbe7b PE |
290 | static Lisp_Object Qexpand_file_name; |
291 | static Lisp_Object Qsubstitute_in_file_name; | |
292 | static Lisp_Object Qdirectory_file_name; | |
293 | static Lisp_Object Qfile_name_directory; | |
294 | static Lisp_Object Qfile_name_nondirectory; | |
295 | static Lisp_Object Qunhandled_file_name_directory; | |
296 | static Lisp_Object Qfile_name_as_directory; | |
297 | static Lisp_Object Qcopy_file; | |
298 | static Lisp_Object Qmake_directory_internal; | |
299 | static Lisp_Object Qmake_directory; | |
300 | static Lisp_Object Qdelete_directory_internal; | |
32f4334d | 301 | Lisp_Object Qdelete_file; |
955cbe7b PE |
302 | static Lisp_Object Qrename_file; |
303 | static Lisp_Object Qadd_name_to_file; | |
304 | static Lisp_Object Qmake_symbolic_link; | |
32f4334d | 305 | Lisp_Object Qfile_exists_p; |
955cbe7b PE |
306 | static Lisp_Object Qfile_executable_p; |
307 | static Lisp_Object Qfile_readable_p; | |
308 | static Lisp_Object Qfile_writable_p; | |
309 | static Lisp_Object Qfile_symlink_p; | |
310 | static Lisp_Object Qaccess_file; | |
32f4334d | 311 | Lisp_Object Qfile_directory_p; |
955cbe7b PE |
312 | static Lisp_Object Qfile_regular_p; |
313 | static Lisp_Object Qfile_accessible_directory_p; | |
314 | static Lisp_Object Qfile_modes; | |
315 | static Lisp_Object Qset_file_modes; | |
316 | static Lisp_Object Qset_file_times; | |
317 | static Lisp_Object Qfile_selinux_context; | |
318 | static Lisp_Object Qset_file_selinux_context; | |
7c3d167f RF |
319 | static Lisp_Object Qfile_acl; |
320 | static Lisp_Object Qset_file_acl; | |
955cbe7b | 321 | static Lisp_Object Qfile_newer_than_file_p; |
32f4334d | 322 | Lisp_Object Qinsert_file_contents; |
3f011c7f | 323 | static Lisp_Object Qchoose_write_coding_system; |
32f4334d | 324 | Lisp_Object Qwrite_region; |
955cbe7b PE |
325 | static Lisp_Object Qverify_visited_file_modtime; |
326 | static Lisp_Object Qset_visited_file_modtime; | |
32f4334d | 327 | |
a7ca3326 | 328 | DEFUN ("find-file-name-handler", Ffind_file_name_handler, |
16a97296 | 329 | Sfind_file_name_handler, 2, 2, 0, |
8c1a1077 PJ |
330 | doc: /* Return FILENAME's handler function for OPERATION, if it has one. |
331 | Otherwise, return nil. | |
332 | A file name is handled if one of the regular expressions in | |
333 | `file-name-handler-alist' matches it. | |
334 | ||
335 | If OPERATION equals `inhibit-file-name-operation', then we ignore | |
336 | any handlers that are members of `inhibit-file-name-handlers', | |
337 | but we still do run any other handlers. This lets handlers | |
338 | use the standard functions without calling themselves recursively. */) | |
5842a27b | 339 | (Lisp_Object filename, Lisp_Object operation) |
32f4334d | 340 | { |
642ef245 | 341 | /* This function must not munge the match data. */ |
204ee271 | 342 | Lisp_Object chain, inhibited_handlers, result; |
d311d28c | 343 | ptrdiff_t pos = -1; |
642ef245 | 344 | |
204ee271 | 345 | result = Qnil; |
b7826503 | 346 | CHECK_STRING (filename); |
e4432095 | 347 | |
a65970a0 RS |
348 | if (EQ (operation, Vinhibit_file_name_operation)) |
349 | inhibited_handlers = Vinhibit_file_name_handlers; | |
350 | else | |
351 | inhibited_handlers = Qnil; | |
82c2d839 | 352 | |
93c30b5f | 353 | for (chain = Vfile_name_handler_alist; CONSP (chain); |
03699b14 | 354 | chain = XCDR (chain)) |
32f4334d RS |
355 | { |
356 | Lisp_Object elt; | |
03699b14 | 357 | elt = XCAR (chain); |
93c30b5f | 358 | if (CONSP (elt)) |
32f4334d | 359 | { |
f6c9b683 | 360 | Lisp_Object string = XCAR (elt); |
d311d28c | 361 | ptrdiff_t match_pos; |
f6c9b683 | 362 | Lisp_Object handler = XCDR (elt); |
68780e2a RS |
363 | Lisp_Object operations = Qnil; |
364 | ||
365 | if (SYMBOLP (handler)) | |
366 | operations = Fget (handler, Qoperations); | |
f6c9b683 | 367 | |
8d2ced53 | 368 | if (STRINGP (string) |
f6c9b683 RS |
369 | && (match_pos = fast_string_match (string, filename)) > pos |
370 | && (NILP (operations) || ! NILP (Fmemq (operation, operations)))) | |
a65970a0 | 371 | { |
f6c9b683 | 372 | Lisp_Object tem; |
a65970a0 | 373 | |
03699b14 | 374 | handler = XCDR (elt); |
a65970a0 RS |
375 | tem = Fmemq (handler, inhibited_handlers); |
376 | if (NILP (tem)) | |
8d2ced53 SM |
377 | { |
378 | result = handler; | |
379 | pos = match_pos; | |
380 | } | |
a65970a0 | 381 | } |
32f4334d | 382 | } |
642ef245 JB |
383 | |
384 | QUIT; | |
32f4334d | 385 | } |
8d2ced53 | 386 | return result; |
32f4334d RS |
387 | } |
388 | \f | |
a7ca3326 | 389 | DEFUN ("file-name-directory", Ffile_name_directory, Sfile_name_directory, |
8c1a1077 PJ |
390 | 1, 1, 0, |
391 | doc: /* Return the directory component in file name FILENAME. | |
392 | Return nil if FILENAME does not include a directory. | |
78379264 | 393 | Otherwise return a directory name. |
7c2fb837 | 394 | Given a Unix syntax file name, returns a string ending in slash. */) |
5842a27b | 395 | (Lisp_Object filename) |
570d7624 | 396 | { |
100c44b7 | 397 | #ifndef DOS_NT |
5976c3fe | 398 | register const char *beg; |
100c44b7 | 399 | #else |
5976c3fe | 400 | register char *beg; |
273ac8d1 | 401 | Lisp_Object tem_fn; |
100c44b7 | 402 | #endif |
5976c3fe | 403 | register const char *p; |
0bf2eed2 | 404 | Lisp_Object handler; |
570d7624 | 405 | |
b7826503 | 406 | CHECK_STRING (filename); |
570d7624 | 407 | |
0bf2eed2 RS |
408 | /* If the file name has special constructs in it, |
409 | call the corresponding file handler. */ | |
3b7f6e60 | 410 | handler = Ffind_file_name_handler (filename, Qfile_name_directory); |
0bf2eed2 | 411 | if (!NILP (handler)) |
2375c96a CY |
412 | { |
413 | Lisp_Object handled_name = call2 (handler, Qfile_name_directory, | |
414 | filename); | |
415 | return STRINGP (handled_name) ? handled_name : Qnil; | |
416 | } | |
0bf2eed2 | 417 | |
199607e4 | 418 | #ifdef DOS_NT |
5b71542d | 419 | beg = xlispstrdupa (filename); |
0f3f018c | 420 | #else |
5976c3fe | 421 | beg = SSDATA (filename); |
199607e4 | 422 | #endif |
d5db4077 | 423 | p = beg + SBYTES (filename); |
570d7624 | 424 | |
199607e4 | 425 | while (p != beg && !IS_DIRECTORY_SEP (p[-1]) |
199607e4 | 426 | #ifdef DOS_NT |
e1dbe924 | 427 | /* only recognize drive specifier at the beginning */ |
ba14e174 RS |
428 | && !(p[-1] == ':' |
429 | /* handle the "/:d:foo" and "/:foo" cases correctly */ | |
430 | && ((p == beg + 2 && !IS_DIRECTORY_SEP (*beg)) | |
431 | || (p == beg + 4 && IS_DIRECTORY_SEP (*beg)))) | |
199607e4 | 432 | #endif |
570d7624 JB |
433 | ) p--; |
434 | ||
435 | if (p == beg) | |
436 | return Qnil; | |
5e570b75 | 437 | #ifdef DOS_NT |
4c3c22f3 | 438 | /* Expansion of "c:" to drive and default directory. */ |
ba14e174 | 439 | if (p[-1] == ':') |
4c3c22f3 | 440 | { |
4c3c22f3 | 441 | /* MAXPATHLEN+1 is guaranteed to be enough space for getdefdir. */ |
5976c3fe PE |
442 | char *res = alloca (MAXPATHLEN + 1); |
443 | char *r = res; | |
ba14e174 RS |
444 | |
445 | if (p == beg + 4 && IS_DIRECTORY_SEP (*beg) && beg[1] == ':') | |
446 | { | |
e99a530f | 447 | memcpy (res, beg, 2); |
ba14e174 RS |
448 | beg += 2; |
449 | r += 2; | |
450 | } | |
451 | ||
620f13b0 | 452 | if (getdefdir (c_toupper (*beg) - 'A' + 1, r)) |
4c3c22f3 | 453 | { |
e7ac588e EZ |
454 | size_t l = strlen (res); |
455 | ||
456 | if (l > 3 || !IS_DIRECTORY_SEP (res[l - 1])) | |
4c3c22f3 RS |
457 | strcat (res, "/"); |
458 | beg = res; | |
459 | p = beg + strlen (beg); | |
1fd201bb | 460 | dostounix_filename (beg); |
f5c81c80 EZ |
461 | tem_fn = make_specified_string (beg, -1, p - beg, |
462 | STRING_MULTIBYTE (filename)); | |
4c3c22f3 | 463 | } |
f5c81c80 EZ |
464 | else |
465 | tem_fn = make_specified_string (beg - 2, -1, p - beg + 2, | |
466 | STRING_MULTIBYTE (filename)); | |
467 | } | |
468 | else if (STRING_MULTIBYTE (filename)) | |
469 | { | |
e7ac588e | 470 | tem_fn = make_specified_string (beg, -1, p - beg, 1); |
1fd201bb | 471 | dostounix_filename (SSDATA (tem_fn)); |
e7ac588e EZ |
472 | #ifdef WINDOWSNT |
473 | if (!NILP (Vw32_downcase_file_names)) | |
474 | tem_fn = Fdowncase (tem_fn); | |
475 | #endif | |
f5c81c80 EZ |
476 | } |
477 | else | |
478 | { | |
1fd201bb | 479 | dostounix_filename (beg); |
f5c81c80 | 480 | tem_fn = make_specified_string (beg, -1, p - beg, 0); |
4c3c22f3 | 481 | } |
f5c81c80 | 482 | return tem_fn; |
273ac8d1 | 483 | #else /* DOS_NT */ |
d7231f93 | 484 | return make_specified_string (beg, -1, p - beg, STRING_MULTIBYTE (filename)); |
273ac8d1 | 485 | #endif /* DOS_NT */ |
570d7624 JB |
486 | } |
487 | ||
a7ca3326 | 488 | DEFUN ("file-name-nondirectory", Ffile_name_nondirectory, |
60d67b83 | 489 | Sfile_name_nondirectory, 1, 1, 0, |
8c1a1077 PJ |
490 | doc: /* Return file name FILENAME sans its directory. |
491 | For example, in a Unix-syntax file name, | |
492 | this is everything after the last slash, | |
493 | or the entire name if it contains no slash. */) | |
5842a27b | 494 | (Lisp_Object filename) |
570d7624 | 495 | { |
5976c3fe | 496 | register const char *beg, *p, *end; |
0bf2eed2 | 497 | Lisp_Object handler; |
570d7624 | 498 | |
b7826503 | 499 | CHECK_STRING (filename); |
570d7624 | 500 | |
0bf2eed2 RS |
501 | /* If the file name has special constructs in it, |
502 | call the corresponding file handler. */ | |
3b7f6e60 | 503 | handler = Ffind_file_name_handler (filename, Qfile_name_nondirectory); |
0bf2eed2 | 504 | if (!NILP (handler)) |
2375c96a CY |
505 | { |
506 | Lisp_Object handled_name = call2 (handler, Qfile_name_nondirectory, | |
507 | filename); | |
508 | if (STRINGP (handled_name)) | |
509 | return handled_name; | |
510 | error ("Invalid handler in `file-name-handler-alist'"); | |
511 | } | |
0bf2eed2 | 512 | |
5976c3fe | 513 | beg = SSDATA (filename); |
d5db4077 | 514 | end = p = beg + SBYTES (filename); |
570d7624 | 515 | |
199607e4 | 516 | while (p != beg && !IS_DIRECTORY_SEP (p[-1]) |
199607e4 | 517 | #ifdef DOS_NT |
e1dbe924 | 518 | /* only recognize drive specifier at beginning */ |
ba14e174 RS |
519 | && !(p[-1] == ':' |
520 | /* handle the "/:d:foo" case correctly */ | |
521 | && (p == beg + 2 || (p == beg + 4 && IS_DIRECTORY_SEP (*beg)))) | |
199607e4 | 522 | #endif |
60d67b83 RS |
523 | ) |
524 | p--; | |
570d7624 | 525 | |
d7231f93 | 526 | return make_specified_string (p, -1, end - p, STRING_MULTIBYTE (filename)); |
570d7624 | 527 | } |
642ef245 | 528 | |
a7ca3326 | 529 | DEFUN ("unhandled-file-name-directory", Funhandled_file_name_directory, |
60d67b83 | 530 | Sunhandled_file_name_directory, 1, 1, 0, |
8c1a1077 PJ |
531 | doc: /* Return a directly usable directory name somehow associated with FILENAME. |
532 | A `directly usable' directory name is one that may be used without the | |
533 | intervention of any file handler. | |
534 | If FILENAME is a directly usable file itself, return | |
535 | \(file-name-directory FILENAME). | |
ca319910 SM |
536 | If FILENAME refers to a file which is not accessible from a local process, |
537 | then this should return nil. | |
8c1a1077 PJ |
538 | The `call-process' and `start-process' functions use this function to |
539 | get a current directory to run processes in. */) | |
5842a27b | 540 | (Lisp_Object filename) |
642ef245 JB |
541 | { |
542 | Lisp_Object handler; | |
543 | ||
544 | /* If the file name has special constructs in it, | |
545 | call the corresponding file handler. */ | |
49307295 | 546 | handler = Ffind_file_name_handler (filename, Qunhandled_file_name_directory); |
642ef245 | 547 | if (!NILP (handler)) |
2375c96a CY |
548 | { |
549 | Lisp_Object handled_name = call2 (handler, Qunhandled_file_name_directory, | |
550 | filename); | |
551 | return STRINGP (handled_name) ? handled_name : Qnil; | |
552 | } | |
642ef245 JB |
553 | |
554 | return Ffile_name_directory (filename); | |
555 | } | |
556 | ||
c365c355 PE |
557 | /* Maximum number of bytes that DST will be longer than SRC |
558 | in file_name_as_directory. This occurs when SRCLEN == 0. */ | |
559 | enum { file_name_as_directory_slop = 2 }; | |
560 | ||
f5c81c80 EZ |
561 | /* Convert from file name SRC of length SRCLEN to directory name in |
562 | DST. MULTIBYTE non-zero means the file name in SRC is a multibyte | |
563 | string. On UNIX, just make sure there is a terminating /. Return | |
564 | the length of DST in bytes. */ | |
570d7624 | 565 | |
c293e30c | 566 | static ptrdiff_t |
f5c81c80 EZ |
567 | file_name_as_directory (char *dst, const char *src, ptrdiff_t srclen, |
568 | bool multibyte) | |
c293e30c DA |
569 | { |
570 | if (srclen == 0) | |
8aa3a244 | 571 | { |
c293e30c DA |
572 | dst[0] = '.'; |
573 | dst[1] = '/'; | |
574 | dst[2] = '\0'; | |
575 | return 2; | |
8aa3a244 RS |
576 | } |
577 | ||
c365c355 | 578 | memcpy (dst, src, srclen); |
c293e30c | 579 | if (!IS_DIRECTORY_SEP (dst[srclen - 1])) |
c365c355 PE |
580 | dst[srclen++] = DIRECTORY_SEP; |
581 | dst[srclen] = 0; | |
199607e4 | 582 | #ifdef DOS_NT |
1fd201bb | 583 | dostounix_filename (dst); |
199607e4 | 584 | #endif |
c293e30c | 585 | return srclen; |
570d7624 JB |
586 | } |
587 | ||
a7ca3326 | 588 | DEFUN ("file-name-as-directory", Ffile_name_as_directory, |
570d7624 | 589 | Sfile_name_as_directory, 1, 1, 0, |
0dac4f85 | 590 | doc: /* Return a string representing the file name FILE interpreted as a directory. |
8c1a1077 PJ |
591 | This operation exists because a directory is also a file, but its name as |
592 | a directory is different from its name as a file. | |
593 | The result can be used as the value of `default-directory' | |
594 | or passed as second argument to `expand-file-name'. | |
7c2fb837 | 595 | For a Unix-syntax file name, just appends a slash. */) |
5842a27b | 596 | (Lisp_Object file) |
570d7624 JB |
597 | { |
598 | char *buf; | |
c293e30c | 599 | ptrdiff_t length; |
c365c355 PE |
600 | Lisp_Object handler, val; |
601 | USE_SAFE_ALLOCA; | |
570d7624 | 602 | |
b7826503 | 603 | CHECK_STRING (file); |
265a9e55 | 604 | if (NILP (file)) |
570d7624 | 605 | return Qnil; |
0bf2eed2 RS |
606 | |
607 | /* If the file name has special constructs in it, | |
608 | call the corresponding file handler. */ | |
49307295 | 609 | handler = Ffind_file_name_handler (file, Qfile_name_as_directory); |
0bf2eed2 | 610 | if (!NILP (handler)) |
2375c96a CY |
611 | { |
612 | Lisp_Object handled_name = call2 (handler, Qfile_name_as_directory, | |
613 | file); | |
614 | if (STRINGP (handled_name)) | |
615 | return handled_name; | |
616 | error ("Invalid handler in `file-name-handler-alist'"); | |
617 | } | |
0bf2eed2 | 618 | |
e7ac588e EZ |
619 | #ifdef WINDOWSNT |
620 | if (!NILP (Vw32_downcase_file_names)) | |
621 | file = Fdowncase (file); | |
622 | #endif | |
c365c355 | 623 | buf = SAFE_ALLOCA (SBYTES (file) + file_name_as_directory_slop + 1); |
f5c81c80 EZ |
624 | length = file_name_as_directory (buf, SSDATA (file), SBYTES (file), |
625 | STRING_MULTIBYTE (file)); | |
c365c355 PE |
626 | val = make_specified_string (buf, -1, length, STRING_MULTIBYTE (file)); |
627 | SAFE_FREE (); | |
628 | return val; | |
570d7624 JB |
629 | } |
630 | \f | |
f5c81c80 EZ |
631 | /* Convert from directory name SRC of length SRCLEN to file name in |
632 | DST. MULTIBYTE non-zero means the file name in SRC is a multibyte | |
633 | string. On UNIX, just make sure there isn't a terminating /. | |
634 | Return the length of DST in bytes. */ | |
570d7624 | 635 | |
c293e30c | 636 | static ptrdiff_t |
f5c81c80 | 637 | directory_file_name (char *dst, char *src, ptrdiff_t srclen, bool multibyte) |
570d7624 | 638 | { |
570d7624 | 639 | /* Process as Unix format: just remove any final slash. |
c365c355 PE |
640 | But leave "/" and "//" unchanged. */ |
641 | while (srclen > 1 | |
4592782e | 642 | #ifdef DOS_NT |
c365c355 | 643 | && !IS_ANY_SEP (src[srclen - 2]) |
4592782e | 644 | #endif |
c365c355 PE |
645 | && IS_DIRECTORY_SEP (src[srclen - 1]) |
646 | && ! (srclen == 2 && IS_DIRECTORY_SEP (src[0]))) | |
647 | srclen--; | |
648 | ||
649 | memcpy (dst, src, srclen); | |
650 | dst[srclen] = 0; | |
199607e4 | 651 | #ifdef DOS_NT |
1fd201bb | 652 | dostounix_filename (dst); |
125feee8 | 653 | #endif |
c293e30c | 654 | return srclen; |
570d7624 JB |
655 | } |
656 | ||
a7ca3326 | 657 | DEFUN ("directory-file-name", Fdirectory_file_name, Sdirectory_file_name, |
8c1a1077 PJ |
658 | 1, 1, 0, |
659 | doc: /* Returns the file name of the directory named DIRECTORY. | |
660 | This is the name of the file that holds the data for the directory DIRECTORY. | |
661 | This operation exists because a directory is also a file, but its name as | |
662 | a directory is different from its name as a file. | |
7c2fb837 | 663 | In Unix-syntax, this function just removes the final slash. */) |
5842a27b | 664 | (Lisp_Object directory) |
570d7624 JB |
665 | { |
666 | char *buf; | |
c293e30c | 667 | ptrdiff_t length; |
c365c355 PE |
668 | Lisp_Object handler, val; |
669 | USE_SAFE_ALLOCA; | |
570d7624 | 670 | |
b7826503 | 671 | CHECK_STRING (directory); |
570d7624 | 672 | |
265a9e55 | 673 | if (NILP (directory)) |
570d7624 | 674 | return Qnil; |
0bf2eed2 RS |
675 | |
676 | /* If the file name has special constructs in it, | |
677 | call the corresponding file handler. */ | |
49307295 | 678 | handler = Ffind_file_name_handler (directory, Qdirectory_file_name); |
0bf2eed2 | 679 | if (!NILP (handler)) |
2375c96a CY |
680 | { |
681 | Lisp_Object handled_name = call2 (handler, Qdirectory_file_name, | |
682 | directory); | |
683 | if (STRINGP (handled_name)) | |
684 | return handled_name; | |
685 | error ("Invalid handler in `file-name-handler-alist'"); | |
686 | } | |
0bf2eed2 | 687 | |
e7ac588e EZ |
688 | #ifdef WINDOWSNT |
689 | if (!NILP (Vw32_downcase_file_names)) | |
690 | directory = Fdowncase (directory); | |
691 | #endif | |
c365c355 | 692 | buf = SAFE_ALLOCA (SBYTES (directory) + 1); |
f5c81c80 EZ |
693 | length = directory_file_name (buf, SSDATA (directory), SBYTES (directory), |
694 | STRING_MULTIBYTE (directory)); | |
c365c355 PE |
695 | val = make_specified_string (buf, -1, length, STRING_MULTIBYTE (directory)); |
696 | SAFE_FREE (); | |
697 | return val; | |
570d7624 JB |
698 | } |
699 | ||
91433552 | 700 | static const char make_temp_name_tbl[64] = |
3ce839e4 RS |
701 | { |
702 | 'A','B','C','D','E','F','G','H', | |
703 | 'I','J','K','L','M','N','O','P', | |
704 | 'Q','R','S','T','U','V','W','X', | |
705 | 'Y','Z','a','b','c','d','e','f', | |
706 | 'g','h','i','j','k','l','m','n', | |
707 | 'o','p','q','r','s','t','u','v', | |
708 | 'w','x','y','z','0','1','2','3', | |
709 | '4','5','6','7','8','9','-','_' | |
710 | }; | |
cb613bb8 | 711 | |
3ce839e4 RS |
712 | static unsigned make_temp_name_count, make_temp_name_count_initialized_p; |
713 | ||
cb613bb8 | 714 | /* Value is a temporary file name starting with PREFIX, a string. |
efdc16c9 | 715 | |
cb613bb8 GM |
716 | The Emacs process number forms part of the result, so there is |
717 | no danger of generating a name being used by another process. | |
718 | In addition, this function makes an attempt to choose a name | |
719 | which has no existing file. To make this work, PREFIX should be | |
720 | an absolute file name. | |
efdc16c9 | 721 | |
f75d7a91 | 722 | BASE64_P means add the pid as 3 characters in base64 |
cb613bb8 GM |
723 | encoding. In this case, 6 characters will be added to PREFIX to |
724 | form the file name. Otherwise, if Emacs is running on a system | |
725 | with long file names, add the pid as a decimal number. | |
726 | ||
727 | This function signals an error if no unique file name could be | |
728 | generated. */ | |
729 | ||
730 | Lisp_Object | |
f75d7a91 | 731 | make_temp_name (Lisp_Object prefix, bool base64_p) |
570d7624 | 732 | { |
d0065ff1 EZ |
733 | Lisp_Object val, encoded_prefix; |
734 | int len; | |
a81d11a3 | 735 | printmax_t pid; |
5976c3fe | 736 | char *p, *data; |
a81d11a3 | 737 | char pidbuf[INT_BUFSIZE_BOUND (printmax_t)]; |
3ce839e4 | 738 | int pidlen; |
efdc16c9 | 739 | |
b7826503 | 740 | CHECK_STRING (prefix); |
3ce839e4 RS |
741 | |
742 | /* VAL is created by adding 6 characters to PREFIX. The first | |
743 | three are the PID of this process, in base 64, and the second | |
744 | three are incremented if the file already exists. This ensures | |
745 | 262144 unique file names per PID per PREFIX. */ | |
746 | ||
93f4cf88 | 747 | pid = getpid (); |
3ce839e4 | 748 | |
cb613bb8 GM |
749 | if (base64_p) |
750 | { | |
751 | pidbuf[0] = make_temp_name_tbl[pid & 63], pid >>= 6; | |
752 | pidbuf[1] = make_temp_name_tbl[pid & 63], pid >>= 6; | |
753 | pidbuf[2] = make_temp_name_tbl[pid & 63], pid >>= 6; | |
754 | pidlen = 3; | |
755 | } | |
756 | else | |
757 | { | |
3ce839e4 | 758 | #ifdef HAVE_LONG_FILE_NAMES |
a81d11a3 | 759 | pidlen = sprintf (pidbuf, "%"pMd, pid); |
3a3bfb18 | 760 | #else |
cb613bb8 GM |
761 | pidbuf[0] = make_temp_name_tbl[pid & 63], pid >>= 6; |
762 | pidbuf[1] = make_temp_name_tbl[pid & 63], pid >>= 6; | |
763 | pidbuf[2] = make_temp_name_tbl[pid & 63], pid >>= 6; | |
764 | pidlen = 3; | |
3ce839e4 | 765 | #endif |
cb613bb8 | 766 | } |
efdc16c9 | 767 | |
d0065ff1 EZ |
768 | encoded_prefix = ENCODE_FILE (prefix); |
769 | len = SBYTES (encoded_prefix); | |
770 | val = make_uninit_string (len + 3 + pidlen); | |
5976c3fe | 771 | data = SSDATA (val); |
d0065ff1 | 772 | memcpy (data, SSDATA (encoded_prefix), len); |
3ce839e4 RS |
773 | p = data + len; |
774 | ||
72af86bd | 775 | memcpy (p, pidbuf, pidlen); |
3ce839e4 RS |
776 | p += pidlen; |
777 | ||
778 | /* Here we try to minimize useless stat'ing when this function is | |
779 | invoked many times successively with the same PREFIX. We achieve | |
780 | this by initializing count to a random value, and incrementing it | |
f6a492a9 RS |
781 | afterwards. |
782 | ||
783 | We don't want make-temp-name to be called while dumping, | |
784 | because then make_temp_name_count_initialized_p would get set | |
785 | and then make_temp_name_count would not be set when Emacs starts. */ | |
786 | ||
3ce839e4 RS |
787 | if (!make_temp_name_count_initialized_p) |
788 | { | |
327eeec8 | 789 | make_temp_name_count = time (NULL); |
3ce839e4 RS |
790 | make_temp_name_count_initialized_p = 1; |
791 | } | |
792 | ||
793 | while (1) | |
794 | { | |
8a7777fc | 795 | unsigned num = make_temp_name_count; |
3ce839e4 RS |
796 | |
797 | p[0] = make_temp_name_tbl[num & 63], num >>= 6; | |
798 | p[1] = make_temp_name_tbl[num & 63], num >>= 6; | |
799 | p[2] = make_temp_name_tbl[num & 63], num >>= 6; | |
800 | ||
8a7777fc RS |
801 | /* Poor man's congruential RN generator. Replace with |
802 | ++make_temp_name_count for debugging. */ | |
803 | make_temp_name_count += 25229; | |
804 | make_temp_name_count %= 225307; | |
805 | ||
bb385a92 | 806 | if (!check_existing (data)) |
3ce839e4 RS |
807 | { |
808 | /* We want to return only if errno is ENOENT. */ | |
809 | if (errno == ENOENT) | |
d0065ff1 | 810 | return DECODE_FILE (val); |
3ce839e4 RS |
811 | else |
812 | /* The error here is dubious, but there is little else we | |
813 | can do. The alternatives are to return nil, which is | |
814 | as bad as (and in many cases worse than) throwing the | |
815 | error, or to ignore the error, which will likely result | |
8a7777fc | 816 | in looping through 225307 stat's, which is not only |
410ed5c3 PE |
817 | dog-slow, but also useless since eventually nil would |
818 | have to be returned anyway. */ | |
9869bb0b | 819 | report_file_error ("Cannot create temporary name for prefix", |
a9757f6a | 820 | prefix); |
3ce839e4 RS |
821 | /* not reached */ |
822 | } | |
823 | } | |
570d7624 | 824 | } |
3ce839e4 | 825 | |
cb613bb8 GM |
826 | |
827 | DEFUN ("make-temp-name", Fmake_temp_name, Smake_temp_name, 1, 1, 0, | |
8c1a1077 PJ |
828 | doc: /* Generate temporary file name (string) starting with PREFIX (a string). |
829 | The Emacs process number forms part of the result, | |
830 | so there is no danger of generating a name being used by another process. | |
831 | ||
832 | In addition, this function makes an attempt to choose a name | |
833 | which has no existing file. To make this work, | |
834 | PREFIX should be an absolute file name. | |
835 | ||
836 | There is a race condition between calling `make-temp-name' and creating the | |
837 | file which opens all kinds of security holes. For that reason, you should | |
f9e6f049 RS |
838 | probably use `make-temp-file' instead, except in three circumstances: |
839 | ||
840 | * If you are creating the file in the user's home directory. | |
841 | * If you are creating a directory rather than an ordinary file. | |
842 | * If you are taking special precautions as `make-temp-file' does. */) | |
5842a27b | 843 | (Lisp_Object prefix) |
cb613bb8 GM |
844 | { |
845 | return make_temp_name (prefix, 0); | |
846 | } | |
847 | ||
848 | ||
570d7624 | 849 | \f |
a7ca3326 | 850 | DEFUN ("expand-file-name", Fexpand_file_name, Sexpand_file_name, 1, 2, 0, |
8c1a1077 PJ |
851 | doc: /* Convert filename NAME to absolute, and canonicalize it. |
852 | Second arg DEFAULT-DIRECTORY is directory to start with if NAME is relative | |
d177e213 XF |
853 | \(does not start with slash or tilde); both the directory name and |
854 | a directory's file name are accepted. If DEFAULT-DIRECTORY is nil or | |
855 | missing, the current buffer's value of `default-directory' is used. | |
1b2a627f EZ |
856 | NAME should be a string that is a valid file name for the underlying |
857 | filesystem. | |
8c1a1077 PJ |
858 | File name components that are `.' are removed, and |
859 | so are file name components followed by `..', along with the `..' itself; | |
860 | note that these simplifications are done without checking the resulting | |
861 | file names in the file system. | |
15579471 EZ |
862 | Multiple consecutive slashes are collapsed into a single slash, |
863 | except at the beginning of the file name when they are significant (e.g., | |
864 | UNC file names on MS-Windows.) | |
8c1a1077 PJ |
865 | An initial `~/' expands to your home directory. |
866 | An initial `~USER/' expands to USER's home directory. | |
07114296 CY |
867 | See also the function `substitute-in-file-name'. |
868 | ||
869 | For technical reasons, this function can return correct but | |
870 | non-intuitive results for the root directory; for instance, | |
871 | \(expand-file-name ".." "/") returns "/..". For this reason, use | |
15579471 | 872 | \(directory-file-name (file-name-directory dirname)) to traverse a |
07114296 | 873 | filesystem tree, not (expand-file-name ".." dirname). */) |
5842a27b | 874 | (Lisp_Object name, Lisp_Object default_directory) |
570d7624 | 875 | { |
5b5a2ea1 SM |
876 | /* These point to SDATA and need to be careful with string-relocation |
877 | during GC (via DECODE_FILE). */ | |
2893f146 PE |
878 | char *nm; |
879 | const char *newdir; | |
5b5a2ea1 | 880 | /* This should only point to alloca'd data. */ |
5976c3fe | 881 | char *target; |
199607e4 | 882 | |
93f4cf88 | 883 | ptrdiff_t tlen; |
570d7624 | 884 | struct passwd *pw; |
5e570b75 | 885 | #ifdef DOS_NT |
199607e4 | 886 | int drive = 0; |
f75d7a91 PE |
887 | bool collapse_newdir = 1; |
888 | bool is_escaped = 0; | |
5e570b75 | 889 | #endif /* DOS_NT */ |
93f4cf88 | 890 | ptrdiff_t length; |
2375c96a | 891 | Lisp_Object handler, result, handled_name; |
fce31d69 | 892 | bool multibyte; |
9c06a1f3 | 893 | Lisp_Object hdir; |
c365c355 | 894 | USE_SAFE_ALLOCA; |
199607e4 | 895 | |
b7826503 | 896 | CHECK_STRING (name); |
570d7624 | 897 | |
0bf2eed2 RS |
898 | /* If the file name has special constructs in it, |
899 | call the corresponding file handler. */ | |
49307295 | 900 | handler = Ffind_file_name_handler (name, Qexpand_file_name); |
0bf2eed2 | 901 | if (!NILP (handler)) |
2375c96a CY |
902 | { |
903 | handled_name = call3 (handler, Qexpand_file_name, | |
904 | name, default_directory); | |
905 | if (STRINGP (handled_name)) | |
906 | return handled_name; | |
907 | error ("Invalid handler in `file-name-handler-alist'"); | |
908 | } | |
909 | ||
58fc9587 | 910 | |
3b7f6e60 EN |
911 | /* Use the buffer's default-directory if DEFAULT_DIRECTORY is omitted. */ |
912 | if (NILP (default_directory)) | |
4b4deea2 | 913 | default_directory = BVAR (current_buffer, directory); |
82330e7f | 914 | if (! STRINGP (default_directory)) |
dd693537 EZ |
915 | { |
916 | #ifdef DOS_NT | |
917 | /* "/" is not considered a root directory on DOS_NT, so using "/" | |
918 | here causes an infinite recursion in, e.g., the following: | |
919 | ||
920 | (let (default-directory) | |
921 | (expand-file-name "a")) | |
922 | ||
923 | To avoid this, we set default_directory to the root of the | |
924 | current drive. */ | |
dd693537 EZ |
925 | default_directory = build_string (emacs_root_dir ()); |
926 | #else | |
927 | default_directory = build_string ("/"); | |
928 | #endif | |
929 | } | |
58fc9587 | 930 | |
3b7f6e60 | 931 | if (!NILP (default_directory)) |
273e0829 | 932 | { |
3b7f6e60 | 933 | handler = Ffind_file_name_handler (default_directory, Qexpand_file_name); |
273e0829 | 934 | if (!NILP (handler)) |
2375c96a CY |
935 | { |
936 | handled_name = call3 (handler, Qexpand_file_name, | |
937 | name, default_directory); | |
938 | if (STRINGP (handled_name)) | |
939 | return handled_name; | |
940 | error ("Invalid handler in `file-name-handler-alist'"); | |
941 | } | |
273e0829 | 942 | } |
0bf2eed2 | 943 | |
5b5a2ea1 | 944 | { |
5976c3fe | 945 | char *o = SSDATA (default_directory); |
5b5a2ea1 SM |
946 | |
947 | /* Make sure DEFAULT_DIRECTORY is properly expanded. | |
948 | It would be better to do this down below where we actually use | |
949 | default_directory. Unfortunately, calling Fexpand_file_name recursively | |
950 | could invoke GC, and the strings might be relocated. This would | |
951 | be annoying because we have pointers into strings lying around | |
952 | that would need adjusting, and people would add new pointers to | |
953 | the code and forget to adjust them, resulting in intermittent bugs. | |
954 | Putting this call here avoids all that crud. | |
955 | ||
956 | The EQ test avoids infinite recursion. */ | |
957 | if (! NILP (default_directory) && !EQ (default_directory, name) | |
958 | /* Save time in some common cases - as long as default_directory | |
959 | is not relative, it can be canonicalized with name below (if it | |
960 | is needed at all) without requiring it to be expanded now. */ | |
01937013 | 961 | #ifdef DOS_NT |
5b5a2ea1 SM |
962 | /* Detect MSDOS file names with drive specifiers. */ |
963 | && ! (IS_DRIVE (o[0]) && IS_DEVICE_SEP (o[1]) | |
964 | && IS_DIRECTORY_SEP (o[2])) | |
199607e4 | 965 | #ifdef WINDOWSNT |
5b5a2ea1 SM |
966 | /* Detect Windows file names in UNC format. */ |
967 | && ! (IS_DIRECTORY_SEP (o[0]) && IS_DIRECTORY_SEP (o[1])) | |
01937013 | 968 | #endif |
199607e4 RS |
969 | #else /* not DOS_NT */ |
970 | /* Detect Unix absolute file names (/... alone is not absolute on | |
971 | DOS or Windows). */ | |
5b5a2ea1 | 972 | && ! (IS_DIRECTORY_SEP (o[0])) |
199607e4 | 973 | #endif /* not DOS_NT */ |
5b5a2ea1 SM |
974 | ) |
975 | { | |
976 | struct gcpro gcpro1; | |
f14b1c68 | 977 | |
5b5a2ea1 SM |
978 | GCPRO1 (name); |
979 | default_directory = Fexpand_file_name (default_directory, Qnil); | |
980 | UNGCPRO; | |
981 | } | |
982 | } | |
2b046a72 | 983 | multibyte = STRING_MULTIBYTE (name); |
6d060996 KH |
984 | if (multibyte != STRING_MULTIBYTE (default_directory)) |
985 | { | |
986 | if (multibyte) | |
d0065ff1 EZ |
987 | { |
988 | unsigned char *p = SDATA (name); | |
989 | ||
990 | while (*p && ASCII_BYTE_P (*p)) | |
991 | p++; | |
992 | if (*p == '\0') | |
993 | { | |
994 | /* NAME is a pure ASCII string, and DEFAULT_DIRECTORY is | |
995 | unibyte. Do not convert DEFAULT_DIRECTORY to | |
996 | multibyte; instead, convert NAME to a unibyte string, | |
997 | so that the result of this function is also a unibyte | |
a67c4ae0 | 998 | string. This is needed during bootstrapping and |
d0065ff1 EZ |
999 | dumping, when Emacs cannot decode file names, because |
1000 | the locale environment is not set up. */ | |
1001 | name = make_unibyte_string (SSDATA (name), SBYTES (name)); | |
1002 | multibyte = 0; | |
1003 | } | |
1004 | else | |
1005 | default_directory = string_to_multibyte (default_directory); | |
1006 | } | |
6d060996 KH |
1007 | else |
1008 | { | |
1009 | name = string_to_multibyte (name); | |
1010 | multibyte = 1; | |
1011 | } | |
1012 | } | |
1013 | ||
e7ac588e EZ |
1014 | #ifdef WINDOWSNT |
1015 | if (!NILP (Vw32_downcase_file_names)) | |
1016 | default_directory = Fdowncase (default_directory); | |
1017 | #endif | |
1018 | ||
e8d32c7e | 1019 | /* Make a local copy of nm[] to protect it from GC in DECODE_FILE below. */ |
5b71542d | 1020 | nm = xlispstrdupa (name); |
199607e4 | 1021 | |
565f0b98 | 1022 | #ifdef DOS_NT |
f0f95d31 RS |
1023 | /* Note if special escape prefix is present, but remove for now. */ |
1024 | if (nm[0] == '/' && nm[1] == ':') | |
1025 | { | |
1026 | is_escaped = 1; | |
1027 | nm += 2; | |
1028 | } | |
1029 | ||
199607e4 | 1030 | /* Find and remove drive specifier if present; this makes nm absolute |
f0f95d31 RS |
1031 | even if the rest of the name appears to be relative. Only look for |
1032 | drive specifier at the beginning. */ | |
1033 | if (IS_DRIVE (nm[0]) && IS_DEVICE_SEP (nm[1])) | |
1034 | { | |
5976c3fe | 1035 | drive = (unsigned char) nm[0]; |
f0f95d31 RS |
1036 | nm += 2; |
1037 | } | |
bb1ff1f4 GV |
1038 | |
1039 | #ifdef WINDOWSNT | |
1040 | /* If we see "c://somedir", we want to strip the first slash after the | |
1041 | colon when stripping the drive letter. Otherwise, this expands to | |
1042 | "//somedir". */ | |
1043 | if (drive && IS_DIRECTORY_SEP (nm[0]) && IS_DIRECTORY_SEP (nm[1])) | |
1044 | nm++; | |
4c3c22f3 | 1045 | |
e8d32c7e | 1046 | /* Discard any previous drive specifier if nm is now in UNC format. */ |
199607e4 RS |
1047 | if (IS_DIRECTORY_SEP (nm[0]) && IS_DIRECTORY_SEP (nm[1])) |
1048 | { | |
1049 | drive = 0; | |
1050 | } | |
5b5a2ea1 SM |
1051 | #endif /* WINDOWSNT */ |
1052 | #endif /* DOS_NT */ | |
199607e4 | 1053 | |
214378ec GM |
1054 | /* If nm is absolute, look for `/./' or `/../' or `//''sequences; if |
1055 | none are found, we can probably return right away. We will avoid | |
1056 | allocating a new string if name is already fully expanded. */ | |
570d7624 | 1057 | if ( |
5e570b75 | 1058 | IS_DIRECTORY_SEP (nm[0]) |
199607e4 | 1059 | #ifdef MSDOS |
f0f95d31 | 1060 | && drive && !is_escaped |
199607e4 RS |
1061 | #endif |
1062 | #ifdef WINDOWSNT | |
f0f95d31 | 1063 | && (drive || IS_DIRECTORY_SEP (nm[1])) && !is_escaped |
199607e4 | 1064 | #endif |
570d7624 JB |
1065 | ) |
1066 | { | |
f14b1c68 JB |
1067 | /* If it turns out that the filename we want to return is just a |
1068 | suffix of FILENAME, we don't need to go through and edit | |
1069 | things; we just need to construct a new string using data | |
f75d7a91 PE |
1070 | starting at the middle of FILENAME. If we set LOSE, that |
1071 | means we've discovered that we can't do that cool trick. */ | |
1072 | bool lose = 0; | |
5976c3fe | 1073 | char *p = nm; |
f14b1c68 | 1074 | |
570d7624 JB |
1075 | while (*p) |
1076 | { | |
199607e4 | 1077 | /* Since we know the name is absolute, we can assume that each |
c77d647e JB |
1078 | element starts with a "/". */ |
1079 | ||
c77d647e | 1080 | /* "." and ".." are hairy. */ |
5e570b75 | 1081 | if (IS_DIRECTORY_SEP (p[0]) |
c77d647e | 1082 | && p[1] == '.' |
5e570b75 | 1083 | && (IS_DIRECTORY_SEP (p[2]) |
c77d647e | 1084 | || p[2] == 0 |
5e570b75 | 1085 | || (p[2] == '.' && (IS_DIRECTORY_SEP (p[3]) |
c77d647e | 1086 | || p[3] == 0)))) |
570d7624 | 1087 | lose = 1; |
c365c355 PE |
1088 | /* Replace multiple slashes with a single one, except |
1089 | leave leading "//" alone. */ | |
1090 | else if (IS_DIRECTORY_SEP (p[0]) | |
1091 | && IS_DIRECTORY_SEP (p[1]) | |
1092 | && (p != nm || IS_DIRECTORY_SEP (p[2]))) | |
214378ec | 1093 | lose = 1; |
570d7624 JB |
1094 | p++; |
1095 | } | |
1096 | if (!lose) | |
1097 | { | |
199607e4 | 1098 | #ifdef DOS_NT |
087fc47a JB |
1099 | /* Make sure directories are all separated with /, but |
1100 | avoid allocation of a new string when not required. */ | |
1fd201bb | 1101 | dostounix_filename (nm); |
199607e4 RS |
1102 | #ifdef WINDOWSNT |
1103 | if (IS_DIRECTORY_SEP (nm[1])) | |
1104 | { | |
42a5b22f | 1105 | if (strcmp (nm, SSDATA (name)) != 0) |
2b046a72 | 1106 | name = make_specified_string (nm, -1, strlen (nm), multibyte); |
199607e4 RS |
1107 | } |
1108 | else | |
1109 | #endif | |
e8d32c7e | 1110 | /* Drive must be set, so this is okay. */ |
5976c3fe | 1111 | if (strcmp (nm - 2, SSDATA (name)) != 0) |
199607e4 | 1112 | { |
3f817c73 KH |
1113 | char temp[] = " :"; |
1114 | ||
2b046a72 | 1115 | name = make_specified_string (nm, -1, p - nm, multibyte); |
3f817c73 KH |
1116 | temp[0] = DRIVE_LETTER (drive); |
1117 | name = concat2 (build_string (temp), name); | |
199607e4 | 1118 | } |
e7ac588e EZ |
1119 | #ifdef WINDOWSNT |
1120 | if (!NILP (Vw32_downcase_file_names)) | |
1121 | name = Fdowncase (name); | |
1122 | #endif | |
199607e4 RS |
1123 | return name; |
1124 | #else /* not DOS_NT */ | |
42a5b22f | 1125 | if (strcmp (nm, SSDATA (name)) == 0) |
570d7624 | 1126 | return name; |
2b046a72 | 1127 | return make_specified_string (nm, -1, strlen (nm), multibyte); |
5e570b75 | 1128 | #endif /* not DOS_NT */ |
570d7624 JB |
1129 | } |
1130 | } | |
1131 | ||
199607e4 RS |
1132 | /* At this point, nm might or might not be an absolute file name. We |
1133 | need to expand ~ or ~user if present, otherwise prefix nm with | |
1134 | default_directory if nm is not absolute, and finally collapse /./ | |
1135 | and /foo/../ sequences. | |
1136 | ||
1137 | We set newdir to be the appropriate prefix if one is needed: | |
1138 | - the relevant user directory if nm starts with ~ or ~user | |
1139 | - the specified drive's working dir (DOS/NT only) if nm does not | |
1140 | start with / | |
1141 | - the value of default_directory. | |
1142 | ||
1143 | Note that these prefixes are not guaranteed to be absolute (except | |
1144 | for the working dir of a drive). Therefore, to ensure we always | |
1145 | return an absolute name, if the final prefix is not absolute we | |
1146 | append it to the current working directory. */ | |
570d7624 JB |
1147 | |
1148 | newdir = 0; | |
1149 | ||
1150 | if (nm[0] == '~') /* prefix ~ */ | |
c77d647e | 1151 | { |
5e570b75 | 1152 | if (IS_DIRECTORY_SEP (nm[1]) |
c77d647e JB |
1153 | || nm[1] == 0) /* ~ by itself */ |
1154 | { | |
6d557778 EZ |
1155 | Lisp_Object tem; |
1156 | ||
5976c3fe PE |
1157 | if (!(newdir = egetenv ("HOME"))) |
1158 | newdir = ""; | |
199607e4 | 1159 | nm++; |
e8d32c7e | 1160 | /* `egetenv' may return a unibyte string, which will bite us since |
6d557778 | 1161 | we expect the directory to be multibyte. */ |
857fd372 EZ |
1162 | #ifdef WINDOWSNT |
1163 | if (newdir[0]) | |
1164 | { | |
1165 | char newdir_utf8[MAX_UTF8_PATH]; | |
1166 | ||
1167 | filename_from_ansi (newdir, newdir_utf8); | |
1168 | tem = build_string (newdir_utf8); | |
1169 | } | |
1170 | else | |
857fd372 | 1171 | #endif |
db50ad5f | 1172 | tem = build_string (newdir); |
f5c81c80 | 1173 | if (multibyte && !STRING_MULTIBYTE (tem)) |
9c06a1f3 EZ |
1174 | { |
1175 | hdir = DECODE_FILE (tem); | |
5976c3fe | 1176 | newdir = SSDATA (hdir); |
9c06a1f3 | 1177 | } |
5e570b75 | 1178 | #ifdef DOS_NT |
9a1dc3be | 1179 | collapse_newdir = 0; |
4c3c22f3 | 1180 | #endif |
c77d647e JB |
1181 | } |
1182 | else /* ~user/filename */ | |
1183 | { | |
5976c3fe | 1184 | char *o, *p; |
c365c355 PE |
1185 | for (p = nm; *p && !IS_DIRECTORY_SEP (*p); p++) |
1186 | continue; | |
1187 | o = SAFE_ALLOCA (p - nm + 1); | |
72af86bd | 1188 | memcpy (o, nm, p - nm); |
c365c355 | 1189 | o[p - nm] = 0; |
c77d647e | 1190 | |
4d7e6e51 | 1191 | block_input (); |
350e0088 | 1192 | pw = getpwnam (o + 1); |
4d7e6e51 | 1193 | unblock_input (); |
c77d647e JB |
1194 | if (pw) |
1195 | { | |
f5c81c80 EZ |
1196 | Lisp_Object tem; |
1197 | ||
5976c3fe | 1198 | newdir = pw->pw_dir; |
f5c81c80 EZ |
1199 | /* `getpwnam' may return a unibyte string, which will |
1200 | bite us since we expect the directory to be | |
1201 | multibyte. */ | |
1202 | tem = build_string (newdir); | |
1203 | if (multibyte && !STRING_MULTIBYTE (tem)) | |
1204 | { | |
1205 | hdir = DECODE_FILE (tem); | |
1206 | newdir = SSDATA (hdir); | |
1207 | } | |
c77d647e | 1208 | nm = p; |
199607e4 | 1209 | #ifdef DOS_NT |
9a1dc3be | 1210 | collapse_newdir = 0; |
199607e4 | 1211 | #endif |
c77d647e | 1212 | } |
e5d77022 | 1213 | |
c77d647e JB |
1214 | /* If we don't find a user of that name, leave the name |
1215 | unchanged; don't move nm forward to p. */ | |
1216 | } | |
1217 | } | |
570d7624 | 1218 | |
5e570b75 | 1219 | #ifdef DOS_NT |
199607e4 RS |
1220 | /* On DOS and Windows, nm is absolute if a drive name was specified; |
1221 | use the drive's current directory as the prefix if needed. */ | |
1222 | if (!newdir && drive) | |
1223 | { | |
e8d32c7e | 1224 | /* Get default directory if needed to make nm absolute. */ |
2893f146 | 1225 | char *adir = NULL; |
199607e4 RS |
1226 | if (!IS_DIRECTORY_SEP (nm[0])) |
1227 | { | |
2893f146 | 1228 | adir = alloca (MAXPATHLEN + 1); |
620f13b0 | 1229 | if (!getdefdir (c_toupper (drive) - 'A' + 1, adir)) |
2893f146 | 1230 | adir = NULL; |
f5c81c80 EZ |
1231 | else if (multibyte) |
1232 | { | |
1233 | Lisp_Object tem = build_string (adir); | |
1234 | ||
1235 | tem = DECODE_FILE (tem); | |
1236 | memcpy (adir, SSDATA (tem), SBYTES (tem) + 1); | |
1237 | } | |
199607e4 | 1238 | } |
2893f146 | 1239 | if (!adir) |
199607e4 | 1240 | { |
e8d32c7e | 1241 | /* Either nm starts with /, or drive isn't mounted. */ |
2893f146 PE |
1242 | adir = alloca (4); |
1243 | adir[0] = DRIVE_LETTER (drive); | |
1244 | adir[1] = ':'; | |
1245 | adir[2] = '/'; | |
1246 | adir[3] = 0; | |
199607e4 | 1247 | } |
2893f146 | 1248 | newdir = adir; |
199607e4 | 1249 | } |
5e570b75 | 1250 | #endif /* DOS_NT */ |
199607e4 RS |
1251 | |
1252 | /* Finally, if no prefix has been specified and nm is not absolute, | |
e8d32c7e | 1253 | then it must be expanded relative to default_directory. */ |
199607e4 | 1254 | |
34097368 | 1255 | if (1 |
199607e4 | 1256 | #ifndef DOS_NT |
e8d32c7e | 1257 | /* /... alone is not absolute on DOS and Windows. */ |
34097368 | 1258 | && !IS_DIRECTORY_SEP (nm[0]) |
199607e4 RS |
1259 | #endif |
1260 | #ifdef WINDOWSNT | |
34097368 | 1261 | && !(IS_DIRECTORY_SEP (nm[0]) && IS_DIRECTORY_SEP (nm[1])) |
199607e4 | 1262 | #endif |
570d7624 JB |
1263 | && !newdir) |
1264 | { | |
5976c3fe | 1265 | newdir = SSDATA (default_directory); |
f0f95d31 RS |
1266 | #ifdef DOS_NT |
1267 | /* Note if special escape prefix is present, but remove for now. */ | |
1268 | if (newdir[0] == '/' && newdir[1] == ':') | |
1269 | { | |
1270 | is_escaped = 1; | |
1271 | newdir += 2; | |
1272 | } | |
1273 | #endif | |
570d7624 JB |
1274 | } |
1275 | ||
5e570b75 | 1276 | #ifdef DOS_NT |
199607e4 RS |
1277 | if (newdir) |
1278 | { | |
e8d32c7e | 1279 | /* First ensure newdir is an absolute name. */ |
199607e4 RS |
1280 | if ( |
1281 | /* Detect MSDOS file names with drive specifiers. */ | |
1282 | ! (IS_DRIVE (newdir[0]) | |
1283 | && IS_DEVICE_SEP (newdir[1]) && IS_DIRECTORY_SEP (newdir[2])) | |
1284 | #ifdef WINDOWSNT | |
1285 | /* Detect Windows file names in UNC format. */ | |
1286 | && ! (IS_DIRECTORY_SEP (newdir[0]) && IS_DIRECTORY_SEP (newdir[1])) | |
1287 | #endif | |
1288 | ) | |
1289 | { | |
1290 | /* Effectively, let newdir be (expand-file-name newdir cwd). | |
1291 | Because of the admonition against calling expand-file-name | |
1292 | when we have pointers into lisp strings, we accomplish this | |
1293 | indirectly by prepending newdir to nm if necessary, and using | |
e8d32c7e | 1294 | cwd (or the wd of newdir's drive) as the new newdir. */ |
2893f146 | 1295 | char *adir; |
5c4a19a9 EZ |
1296 | #ifdef WINDOWSNT |
1297 | const int adir_size = MAX_UTF8_PATH; | |
1298 | #else | |
1299 | const int adir_size = MAXPATHLEN + 1; | |
1300 | #endif | |
f5c81c80 | 1301 | |
c70a4df6 | 1302 | if (IS_DRIVE (newdir[0]) && IS_DEVICE_SEP (newdir[1])) |
199607e4 | 1303 | { |
5976c3fe | 1304 | drive = (unsigned char) newdir[0]; |
199607e4 RS |
1305 | newdir += 2; |
1306 | } | |
1307 | if (!IS_DIRECTORY_SEP (nm[0])) | |
1308 | { | |
c293e30c | 1309 | ptrdiff_t newlen = strlen (newdir); |
c365c355 PE |
1310 | char *tmp = alloca (newlen + file_name_as_directory_slop |
1311 | + strlen (nm) + 1); | |
f5c81c80 | 1312 | file_name_as_directory (tmp, newdir, newlen, multibyte); |
199607e4 RS |
1313 | strcat (tmp, nm); |
1314 | nm = tmp; | |
1315 | } | |
5c4a19a9 | 1316 | adir = alloca (adir_size); |
199607e4 RS |
1317 | if (drive) |
1318 | { | |
620f13b0 | 1319 | if (!getdefdir (c_toupper (drive) - 'A' + 1, adir)) |
f5c81c80 | 1320 | strcpy (adir, "/"); |
199607e4 RS |
1321 | } |
1322 | else | |
5c4a19a9 | 1323 | getcwd (adir, adir_size); |
f5c81c80 EZ |
1324 | if (multibyte) |
1325 | { | |
1326 | Lisp_Object tem = build_string (adir); | |
1327 | ||
1328 | tem = DECODE_FILE (tem); | |
1329 | memcpy (adir, SSDATA (tem), SBYTES (tem) + 1); | |
1330 | } | |
2893f146 | 1331 | newdir = adir; |
199607e4 RS |
1332 | } |
1333 | ||
e8d32c7e | 1334 | /* Strip off drive name from prefix, if present. */ |
c70a4df6 | 1335 | if (IS_DRIVE (newdir[0]) && IS_DEVICE_SEP (newdir[1])) |
199607e4 RS |
1336 | { |
1337 | drive = newdir[0]; | |
1338 | newdir += 2; | |
1339 | } | |
1340 | ||
1341 | /* Keep only a prefix from newdir if nm starts with slash | |
82330e7f | 1342 | (//server/share for UNC, nothing otherwise). */ |
9a1dc3be | 1343 | if (IS_DIRECTORY_SEP (nm[0]) && collapse_newdir) |
199607e4 RS |
1344 | { |
1345 | #ifdef WINDOWSNT | |
1346 | if (IS_DIRECTORY_SEP (newdir[0]) && IS_DIRECTORY_SEP (newdir[1])) | |
1347 | { | |
2893f146 PE |
1348 | char *adir = strcpy (alloca (strlen (newdir) + 1), newdir); |
1349 | char *p = adir + 2; | |
199607e4 RS |
1350 | while (*p && !IS_DIRECTORY_SEP (*p)) p++; |
1351 | p++; | |
1352 | while (*p && !IS_DIRECTORY_SEP (*p)) p++; | |
1353 | *p = 0; | |
2893f146 | 1354 | newdir = adir; |
199607e4 RS |
1355 | } |
1356 | else | |
1357 | #endif | |
1358 | newdir = ""; | |
1359 | } | |
1360 | } | |
5e570b75 | 1361 | #endif /* DOS_NT */ |
199607e4 RS |
1362 | |
1363 | if (newdir) | |
bfb61299 | 1364 | { |
c365c355 PE |
1365 | /* Ignore any slash at the end of newdir, unless newdir is |
1366 | just "/" or "//". */ | |
199607e4 | 1367 | length = strlen (newdir); |
c365c355 PE |
1368 | while (length > 1 && IS_DIRECTORY_SEP (newdir[length - 1]) |
1369 | && ! (length == 2 && IS_DIRECTORY_SEP (newdir[0]))) | |
1370 | length--; | |
bfb61299 JB |
1371 | } |
1372 | else | |
c365c355 | 1373 | length = 0; |
570d7624 | 1374 | |
e8d32c7e | 1375 | /* Now concatenate the directory and name to new space in the stack frame. */ |
c365c355 | 1376 | tlen = length + file_name_as_directory_slop + strlen (nm) + 1; |
5e570b75 | 1377 | #ifdef DOS_NT |
f0f95d31 RS |
1378 | /* Reserve space for drive specifier and escape prefix, since either |
1379 | or both may need to be inserted. (The Microsoft x86 compiler | |
5e570b75 | 1380 | produces incorrect code if the following two lines are combined.) */ |
38182d90 | 1381 | target = alloca (tlen + 4); |
f0f95d31 | 1382 | target += 4; |
5e570b75 | 1383 | #else /* not DOS_NT */ |
c365c355 | 1384 | target = SAFE_ALLOCA (tlen); |
5e570b75 | 1385 | #endif /* not DOS_NT */ |
570d7624 JB |
1386 | *target = 0; |
1387 | ||
1388 | if (newdir) | |
1389 | { | |
5e570b75 | 1390 | if (nm[0] == 0 || IS_DIRECTORY_SEP (nm[0])) |
f5321b5c | 1391 | { |
3ea2d8b2 | 1392 | #ifdef DOS_NT |
f5321b5c RS |
1393 | /* If newdir is effectively "C:/", then the drive letter will have |
1394 | been stripped and newdir will be "/". Concatenating with an | |
1395 | absolute directory in nm produces "//", which will then be | |
1396 | incorrectly treated as a network share. Ignore newdir in | |
1397 | this case (keeping the drive letter). */ | |
efdc16c9 | 1398 | if (!(drive && nm[0] && IS_DIRECTORY_SEP (newdir[0]) |
f5321b5c RS |
1399 | && newdir[1] == '\0')) |
1400 | #endif | |
c365c355 PE |
1401 | { |
1402 | memcpy (target, newdir, length); | |
1403 | target[length] = 0; | |
1404 | } | |
f5321b5c | 1405 | } |
570d7624 | 1406 | else |
f5c81c80 | 1407 | file_name_as_directory (target, newdir, length, multibyte); |
570d7624 JB |
1408 | } |
1409 | ||
1410 | strcat (target, nm); | |
199607e4 | 1411 | |
214378ec GM |
1412 | /* Now canonicalize by removing `//', `/.' and `/foo/..' if they |
1413 | appear. */ | |
5b5a2ea1 | 1414 | { |
5976c3fe PE |
1415 | char *p = target; |
1416 | char *o = target; | |
570d7624 | 1417 | |
5b5a2ea1 SM |
1418 | while (*p) |
1419 | { | |
5b5a2ea1 SM |
1420 | if (!IS_DIRECTORY_SEP (*p)) |
1421 | { | |
1422 | *o++ = *p++; | |
1423 | } | |
1424 | else if (p[1] == '.' | |
1425 | && (IS_DIRECTORY_SEP (p[2]) | |
1426 | || p[2] == 0)) | |
1427 | { | |
1428 | /* If "/." is the entire filename, keep the "/". Otherwise, | |
1429 | just delete the whole "/.". */ | |
1430 | if (o == target && p[2] == '\0') | |
1431 | *o++ = *p; | |
1432 | p += 2; | |
1433 | } | |
1434 | else if (p[1] == '.' && p[2] == '.' | |
1435 | /* `/../' is the "superroot" on certain file systems. | |
1436 | Turned off on DOS_NT systems because they have no | |
1437 | "superroot" and because this causes us to produce | |
1438 | file names like "d:/../foo" which fail file-related | |
1439 | functions of the underlying OS. (To reproduce, try a | |
1440 | long series of "../../" in default_directory, longer | |
1441 | than the number of levels from the root.) */ | |
aa4060b9 | 1442 | #ifndef DOS_NT |
5b5a2ea1 | 1443 | && o != target |
aa4060b9 | 1444 | #endif |
5b5a2ea1 SM |
1445 | && (IS_DIRECTORY_SEP (p[3]) || p[3] == 0)) |
1446 | { | |
972ed246 | 1447 | #ifdef WINDOWSNT |
5976c3fe | 1448 | char *prev_o = o; |
972ed246 | 1449 | #endif |
7ba11bee PE |
1450 | while (o != target && (--o, !IS_DIRECTORY_SEP (*o))) |
1451 | continue; | |
972ed246 JR |
1452 | #ifdef WINDOWSNT |
1453 | /* Don't go below server level in UNC filenames. */ | |
1454 | if (o == target + 1 && IS_DIRECTORY_SEP (*o) | |
1455 | && IS_DIRECTORY_SEP (*target)) | |
1456 | o = prev_o; | |
1457 | else | |
1458 | #endif | |
5b5a2ea1 SM |
1459 | /* Keep initial / only if this is the whole name. */ |
1460 | if (o == target && IS_ANY_SEP (*o) && p[3] == 0) | |
1461 | ++o; | |
1462 | p += 3; | |
1463 | } | |
c365c355 PE |
1464 | else if (IS_DIRECTORY_SEP (p[1]) |
1465 | && (p != target || IS_DIRECTORY_SEP (p[2]))) | |
1466 | /* Collapse multiple "/", except leave leading "//" alone. */ | |
5b5a2ea1 SM |
1467 | p++; |
1468 | else | |
1469 | { | |
1470 | *o++ = *p++; | |
1471 | } | |
5b5a2ea1 | 1472 | } |
570d7624 | 1473 | |
5e570b75 | 1474 | #ifdef DOS_NT |
e8d32c7e | 1475 | /* At last, set drive name. */ |
5e570b75 | 1476 | #ifdef WINDOWSNT |
5b5a2ea1 SM |
1477 | /* Except for network file name. */ |
1478 | if (!(IS_DIRECTORY_SEP (target[0]) && IS_DIRECTORY_SEP (target[1]))) | |
5e570b75 | 1479 | #endif /* WINDOWSNT */ |
5b5a2ea1 | 1480 | { |
1088b922 | 1481 | if (!drive) emacs_abort (); |
5b5a2ea1 SM |
1482 | target -= 2; |
1483 | target[0] = DRIVE_LETTER (drive); | |
1484 | target[1] = ':'; | |
1485 | } | |
1486 | /* Reinsert the escape prefix if required. */ | |
1487 | if (is_escaped) | |
1488 | { | |
1489 | target -= 2; | |
1490 | target[0] = '/'; | |
1491 | target[1] = ':'; | |
1492 | } | |
5b5a2ea1 | 1493 | result = make_specified_string (target, -1, o - target, multibyte); |
1fd201bb | 1494 | dostounix_filename (SSDATA (result)); |
e7ac588e EZ |
1495 | #ifdef WINDOWSNT |
1496 | if (!NILP (Vw32_downcase_file_names)) | |
1497 | result = Fdowncase (result); | |
1498 | #endif | |
273ac8d1 EZ |
1499 | #else /* !DOS_NT */ |
1500 | result = make_specified_string (target, -1, o - target, multibyte); | |
1501 | #endif /* !DOS_NT */ | |
5b5a2ea1 | 1502 | } |
beb402de KG |
1503 | |
1504 | /* Again look to see if the file name has special constructs in it | |
1505 | and perhaps call the corresponding file handler. This is needed | |
1506 | for filenames such as "/foo/../user@host:/bar/../baz". Expanding | |
1507 | the ".." component gives us "/user@host:/bar/../baz" which needs | |
e8d32c7e | 1508 | to be expanded again. */ |
beb402de KG |
1509 | handler = Ffind_file_name_handler (result, Qexpand_file_name); |
1510 | if (!NILP (handler)) | |
2375c96a CY |
1511 | { |
1512 | handled_name = call3 (handler, Qexpand_file_name, | |
1513 | result, default_directory); | |
c365c355 PE |
1514 | if (! STRINGP (handled_name)) |
1515 | error ("Invalid handler in `file-name-handler-alist'"); | |
1516 | result = handled_name; | |
2375c96a | 1517 | } |
beb402de | 1518 | |
c365c355 | 1519 | SAFE_FREE (); |
beb402de | 1520 | return result; |
570d7624 | 1521 | } |
5e570b75 | 1522 | |
4887597a EZ |
1523 | #if 0 |
1524 | /* PLEASE DO NOT DELETE THIS COMMENTED-OUT VERSION! | |
1525 | This is the old version of expand-file-name, before it was thoroughly | |
1526 | rewritten for Emacs 10.31. We leave this version here commented-out, | |
1527 | because the code is very complex and likely to have subtle bugs. If | |
1528 | bugs _are_ found, it might be of interest to look at the old code and | |
1529 | see what did it do in the relevant situation. | |
1530 | ||
30f50381 GM |
1531 | Don't remove this code: it's true that it will be accessible |
1532 | from the repository, but a few years from deletion, people will | |
1533 | forget it is there. */ | |
4887597a EZ |
1534 | |
1535 | /* Changed this DEFUN to a DEAFUN, so as not to confuse `make-docfile'. */ | |
1536 | DEAFUN ("expand-file-name", Fexpand_file_name, Sexpand_file_name, 1, 2, 0, | |
1537 | "Convert FILENAME to absolute, and canonicalize it.\n\ | |
1538 | Second arg DEFAULT is directory to start with if FILENAME is relative\n\ | |
c70a4df6 | 1539 | \(does not start with slash); if DEFAULT is nil or missing,\n\ |
4887597a EZ |
1540 | the current buffer's value of default-directory is used.\n\ |
1541 | Filenames containing `.' or `..' as components are simplified;\n\ | |
1542 | initial `~/' expands to your home directory.\n\ | |
1543 | See also the function `substitute-in-file-name'.") | |
1544 | (name, defalt) | |
1545 | Lisp_Object name, defalt; | |
1546 | { | |
1547 | unsigned char *nm; | |
1548 | ||
1549 | register unsigned char *newdir, *p, *o; | |
93f4cf88 | 1550 | ptrdiff_t tlen; |
4887597a EZ |
1551 | unsigned char *target; |
1552 | struct passwd *pw; | |
4887597a | 1553 | |
b7826503 | 1554 | CHECK_STRING (name); |
d5db4077 | 1555 | nm = SDATA (name); |
4887597a EZ |
1556 | |
1557 | /* If nm is absolute, flush ...// and detect /./ and /../. | |
1558 | If no /./ or /../ we can return right away. */ | |
7c2fb837 | 1559 | if (nm[0] == '/') |
4887597a | 1560 | { |
f75d7a91 | 1561 | bool lose = 0; |
4887597a | 1562 | p = nm; |
4887597a EZ |
1563 | while (*p) |
1564 | { | |
ce2fe65a | 1565 | if (p[0] == '/' && p[1] == '/') |
4887597a EZ |
1566 | nm = p + 1; |
1567 | if (p[0] == '/' && p[1] == '~') | |
1568 | nm = p + 1, lose = 1; | |
1569 | if (p[0] == '/' && p[1] == '.' | |
1570 | && (p[2] == '/' || p[2] == 0 | |
1571 | || (p[2] == '.' && (p[3] == '/' || p[3] == 0)))) | |
1572 | lose = 1; | |
4887597a EZ |
1573 | p++; |
1574 | } | |
1575 | if (!lose) | |
1576 | { | |
d5db4077 | 1577 | if (nm == SDATA (name)) |
4887597a EZ |
1578 | return name; |
1579 | return build_string (nm); | |
1580 | } | |
1581 | } | |
1582 | ||
e8d32c7e | 1583 | /* Now determine directory to start with and put it in NEWDIR. */ |
4887597a EZ |
1584 | |
1585 | newdir = 0; | |
1586 | ||
1587 | if (nm[0] == '~') /* prefix ~ */ | |
7c2fb837 | 1588 | if (nm[1] == '/' || nm[1] == 0)/* ~/filename */ |
4887597a EZ |
1589 | { |
1590 | if (!(newdir = (unsigned char *) egetenv ("HOME"))) | |
1591 | newdir = (unsigned char *) ""; | |
1592 | nm++; | |
4887597a EZ |
1593 | } |
1594 | else /* ~user/filename */ | |
1595 | { | |
e8d32c7e | 1596 | /* Get past ~ to user. */ |
4887597a | 1597 | unsigned char *user = nm + 1; |
e8d32c7e | 1598 | /* Find end of name. */ |
8966b757 | 1599 | unsigned char *ptr = (unsigned char *) strchr (user, '/'); |
93f4cf88 | 1600 | ptrdiff_t len = ptr ? ptr - user : strlen (user); |
e8d32c7e | 1601 | /* Copy the user name into temp storage. */ |
38182d90 | 1602 | o = alloca (len + 1); |
72af86bd | 1603 | memcpy (o, user, len); |
4887597a EZ |
1604 | o[len] = 0; |
1605 | ||
e8d32c7e | 1606 | /* Look up the user name. */ |
4d7e6e51 | 1607 | block_input (); |
4887597a | 1608 | pw = (struct passwd *) getpwnam (o + 1); |
4d7e6e51 | 1609 | unblock_input (); |
4887597a EZ |
1610 | if (!pw) |
1611 | error ("\"%s\" isn't a registered user", o + 1); | |
1612 | ||
1613 | newdir = (unsigned char *) pw->pw_dir; | |
1614 | ||
1615 | /* Discard the user name from NM. */ | |
1616 | nm += len; | |
1617 | } | |
1618 | ||
7c2fb837 | 1619 | if (nm[0] != '/' && !newdir) |
4887597a EZ |
1620 | { |
1621 | if (NILP (defalt)) | |
1622 | defalt = current_buffer->directory; | |
b7826503 | 1623 | CHECK_STRING (defalt); |
d5db4077 | 1624 | newdir = SDATA (defalt); |
4887597a EZ |
1625 | } |
1626 | ||
e8d32c7e | 1627 | /* Now concatenate the directory and name to new space in the stack frame. */ |
4887597a EZ |
1628 | |
1629 | tlen = (newdir ? strlen (newdir) + 1 : 0) + strlen (nm) + 1; | |
38182d90 | 1630 | target = alloca (tlen); |
4887597a EZ |
1631 | *target = 0; |
1632 | ||
1633 | if (newdir) | |
1634 | { | |
4887597a EZ |
1635 | if (nm[0] == 0 || nm[0] == '/') |
1636 | strcpy (target, newdir); | |
1637 | else | |
4887597a EZ |
1638 | file_name_as_directory (target, newdir); |
1639 | } | |
1640 | ||
1641 | strcat (target, nm); | |
4887597a | 1642 | |
e8d32c7e | 1643 | /* Now canonicalize by removing /. and /foo/.. if they appear. */ |
4887597a EZ |
1644 | |
1645 | p = target; | |
1646 | o = target; | |
1647 | ||
1648 | while (*p) | |
1649 | { | |
4887597a EZ |
1650 | if (*p != '/') |
1651 | { | |
1652 | *o++ = *p++; | |
1653 | } | |
1654 | else if (!strncmp (p, "//", 2) | |
4887597a EZ |
1655 | ) |
1656 | { | |
1657 | o = target; | |
1658 | p++; | |
1659 | } | |
994a7262 RS |
1660 | else if (p[0] == '/' && p[1] == '.' |
1661 | && (p[2] == '/' || p[2] == 0)) | |
4887597a EZ |
1662 | p += 2; |
1663 | else if (!strncmp (p, "/..", 3) | |
1664 | /* `/../' is the "superroot" on certain file systems. */ | |
1665 | && o != target | |
1666 | && (p[3] == '/' || p[3] == 0)) | |
1667 | { | |
1668 | while (o != target && *--o != '/') | |
1669 | ; | |
4887597a EZ |
1670 | if (o == target && *o == '/') |
1671 | ++o; | |
1672 | p += 3; | |
1673 | } | |
1674 | else | |
1675 | { | |
1676 | *o++ = *p++; | |
1677 | } | |
4887597a EZ |
1678 | } |
1679 | ||
1680 | return make_string (target, o - target); | |
1681 | } | |
1682 | #endif | |
570d7624 | 1683 | \f |
c70a4df6 | 1684 | /* If /~ or // appears, discard everything through first slash. */ |
f75d7a91 | 1685 | static bool |
5976c3fe | 1686 | file_name_absolute_p (const char *filename) |
c70a4df6 SM |
1687 | { |
1688 | return | |
1689 | (IS_DIRECTORY_SEP (*filename) || *filename == '~' | |
c70a4df6 SM |
1690 | #ifdef DOS_NT |
1691 | || (IS_DRIVE (*filename) && IS_DEVICE_SEP (filename[1]) | |
1692 | && IS_DIRECTORY_SEP (filename[2])) | |
1693 | #endif | |
1694 | ); | |
1695 | } | |
1696 | ||
5976c3fe PE |
1697 | static char * |
1698 | search_embedded_absfilename (char *nm, char *endp) | |
c70a4df6 | 1699 | { |
5976c3fe | 1700 | char *p, *s; |
c70a4df6 SM |
1701 | |
1702 | for (p = nm + 1; p < endp; p++) | |
1703 | { | |
ce2fe65a | 1704 | if (IS_DIRECTORY_SEP (p[-1]) |
c70a4df6 | 1705 | && file_name_absolute_p (p) |
5e617bc2 | 1706 | #if defined (WINDOWSNT) || defined (CYGWIN) |
c70a4df6 SM |
1707 | /* // at start of file name is meaningful in Apollo, |
1708 | WindowsNT and Cygwin systems. */ | |
f34574c6 | 1709 | && !(IS_DIRECTORY_SEP (p[0]) && p - 1 == nm) |
e39a993c | 1710 | #endif /* not (WINDOWSNT || CYGWIN) */ |
ce2fe65a | 1711 | ) |
c70a4df6 | 1712 | { |
ce2fe65a | 1713 | for (s = p; *s && !IS_DIRECTORY_SEP (*s); s++); |
e8d32c7e | 1714 | if (p[0] == '~' && s > p + 1) /* We've got "/~something/". */ |
c70a4df6 | 1715 | { |
5976c3fe | 1716 | char *o = alloca (s - p + 1); |
c70a4df6 | 1717 | struct passwd *pw; |
72af86bd | 1718 | memcpy (o, p, s - p); |
c70a4df6 SM |
1719 | o [s - p] = 0; |
1720 | ||
1721 | /* If we have ~user and `user' exists, discard | |
1722 | everything up to ~. But if `user' does not exist, leave | |
1723 | ~user alone, it might be a literal file name. */ | |
4d7e6e51 | 1724 | block_input (); |
67c08d6c | 1725 | pw = getpwnam (o + 1); |
4d7e6e51 | 1726 | unblock_input (); |
67c08d6c | 1727 | if (pw) |
c70a4df6 | 1728 | return p; |
c70a4df6 SM |
1729 | } |
1730 | else | |
1731 | return p; | |
1732 | } | |
1733 | } | |
1734 | return NULL; | |
1735 | } | |
1736 | ||
a7ca3326 | 1737 | DEFUN ("substitute-in-file-name", Fsubstitute_in_file_name, |
8c1a1077 PJ |
1738 | Ssubstitute_in_file_name, 1, 1, 0, |
1739 | doc: /* Substitute environment variables referred to in FILENAME. | |
1740 | `$FOO' where FOO is an environment variable name means to substitute | |
1741 | the value of that variable. The variable name should be terminated | |
1742 | with a character not a letter, digit or underscore; otherwise, enclose | |
1743 | the entire variable name in braces. | |
c68845e0 GM |
1744 | |
1745 | If `/~' appears, all of FILENAME through that `/' is discarded. | |
1746 | If `//' appears, everything up to and including the first of | |
1747 | those `/' is discarded. */) | |
5842a27b | 1748 | (Lisp_Object filename) |
570d7624 | 1749 | { |
ee041f2d SM |
1750 | char *nm, *p, *x, *endp; |
1751 | bool substituted = false; | |
fce31d69 | 1752 | bool multibyte; |
5976c3fe | 1753 | char *xnm; |
8ce069f5 | 1754 | Lisp_Object handler; |
570d7624 | 1755 | |
b7826503 | 1756 | CHECK_STRING (filename); |
570d7624 | 1757 | |
58aec0d6 JR |
1758 | multibyte = STRING_MULTIBYTE (filename); |
1759 | ||
8ce069f5 RS |
1760 | /* If the file name has special constructs in it, |
1761 | call the corresponding file handler. */ | |
3b7f6e60 | 1762 | handler = Ffind_file_name_handler (filename, Qsubstitute_in_file_name); |
8ce069f5 | 1763 | if (!NILP (handler)) |
2375c96a CY |
1764 | { |
1765 | Lisp_Object handled_name = call2 (handler, Qsubstitute_in_file_name, | |
1766 | filename); | |
1767 | if (STRINGP (handled_name)) | |
1768 | return handled_name; | |
1769 | error ("Invalid handler in `file-name-handler-alist'"); | |
1770 | } | |
8ce069f5 | 1771 | |
58aec0d6 JR |
1772 | /* Always work on a copy of the string, in case GC happens during |
1773 | decode of environment variables, causing the original Lisp_String | |
1774 | data to be relocated. */ | |
5b71542d | 1775 | nm = xlispstrdupa (filename); |
0f3f018c | 1776 | |
58aec0d6 | 1777 | #ifdef DOS_NT |
1fd201bb | 1778 | dostounix_filename (nm); |
e7ac588e | 1779 | substituted = (memcmp (nm, SDATA (filename), SBYTES (filename)) != 0); |
a5a1cc06 | 1780 | #endif |
d5db4077 | 1781 | endp = nm + SBYTES (filename); |
570d7624 | 1782 | |
82330e7f | 1783 | /* If /~ or // appears, discard everything through first slash. */ |
c70a4df6 SM |
1784 | p = search_embedded_absfilename (nm, endp); |
1785 | if (p) | |
1786 | /* Start over with the new string, so we check the file-name-handler | |
1787 | again. Important with filenames like "/home/foo//:/hello///there" | |
ee7683eb | 1788 | which would substitute to "/:/hello///there" rather than "/there". */ |
c70a4df6 | 1789 | return Fsubstitute_in_file_name |
58aec0d6 | 1790 | (make_specified_string (p, -1, endp - p, multibyte)); |
570d7624 | 1791 | |
ee041f2d | 1792 | /* See if any variables are substituted into the string. */ |
570d7624 | 1793 | |
ee041f2d SM |
1794 | if (!NILP (Ffboundp (Qsubstitute_env_in_file_name))) |
1795 | { | |
1796 | Lisp_Object name | |
1797 | = (!substituted ? filename | |
1798 | : make_specified_string (nm, -1, endp - nm, multibyte)); | |
1799 | Lisp_Object tmp = call1 (Qsubstitute_env_in_file_name, name); | |
1800 | CHECK_STRING (tmp); | |
1801 | if (!EQ (tmp, name)) | |
1802 | substituted = true; | |
1803 | filename = tmp; | |
1804 | } | |
570d7624 JB |
1805 | |
1806 | if (!substituted) | |
e7ac588e EZ |
1807 | { |
1808 | #ifdef WINDOWSNT | |
1809 | if (!NILP (Vw32_downcase_file_names)) | |
1810 | filename = Fdowncase (filename); | |
1811 | #endif | |
1812 | return filename; | |
1813 | } | |
570d7624 | 1814 | |
ee041f2d SM |
1815 | xnm = SSDATA (filename); |
1816 | x = xnm + SBYTES (filename); | |
3d798ba7 | 1817 | |
82330e7f | 1818 | /* If /~ or // appears, discard everything through first slash. */ |
ce2fe65a | 1819 | while ((p = search_embedded_absfilename (xnm, x)) != NULL) |
c70a4df6 SM |
1820 | /* This time we do not start over because we've already expanded envvars |
1821 | and replaced $$ with $. Maybe we should start over as well, but we'd | |
1822 | need to quote some $ to $$ first. */ | |
1823 | xnm = p; | |
570d7624 | 1824 | |
e7ac588e EZ |
1825 | #ifdef WINDOWSNT |
1826 | if (!NILP (Vw32_downcase_file_names)) | |
1827 | { | |
1828 | Lisp_Object xname = make_specified_string (xnm, -1, x - xnm, multibyte); | |
1829 | ||
1830 | xname = Fdowncase (xname); | |
1831 | return xname; | |
1832 | } | |
1833 | else | |
1834 | #endif | |
ee041f2d SM |
1835 | return (xnm == SSDATA (filename) |
1836 | ? filename | |
1837 | : make_specified_string (xnm, -1, x - xnm, multibyte)); | |
570d7624 JB |
1838 | } |
1839 | \f | |
067ffa38 | 1840 | /* A slightly faster and more convenient way to get |
298b760e | 1841 | (directory-file-name (expand-file-name FOO)). */ |
067ffa38 | 1842 | |
570d7624 | 1843 | Lisp_Object |
971de7fb | 1844 | expand_and_dir_to_file (Lisp_Object filename, Lisp_Object defdir) |
570d7624 | 1845 | { |
199607e4 | 1846 | register Lisp_Object absname; |
570d7624 | 1847 | |
199607e4 | 1848 | absname = Fexpand_file_name (filename, defdir); |
7c2fb837 | 1849 | |
199607e4 | 1850 | /* Remove final slash, if any (unless this is the root dir). |
570d7624 | 1851 | stat behaves differently depending! */ |
d5db4077 KR |
1852 | if (SCHARS (absname) > 1 |
1853 | && IS_DIRECTORY_SEP (SREF (absname, SBYTES (absname) - 1)) | |
e8d32c7e | 1854 | && !IS_DEVICE_SEP (SREF (absname, SBYTES (absname) - 2))) |
ddc61f46 | 1855 | /* We cannot take shortcuts; they might be wrong for magic file names. */ |
199607e4 | 1856 | absname = Fdirectory_file_name (absname); |
199607e4 | 1857 | return absname; |
570d7624 JB |
1858 | } |
1859 | \f | |
3ed15d97 | 1860 | /* Signal an error if the file ABSNAME already exists. |
f75d7a91 | 1861 | If INTERACTIVE, ask the user whether to proceed, |
3ed15d97 RS |
1862 | and bypass the error if the user says to go ahead. |
1863 | QUERYSTRING is a name for the action that is being considered | |
1864 | to alter the file. | |
de1d0127 | 1865 | |
3ed15d97 | 1866 | *STATPTR is used to store the stat information if the file exists. |
de1d0127 | 1867 | If the file does not exist, STATPTR->st_mode is set to 0. |
b8b29dc9 RS |
1868 | If STATPTR is null, we don't store into it. |
1869 | ||
f75d7a91 | 1870 | If QUICK, ask for y or n, not yes or no. */ |
3ed15d97 | 1871 | |
f14b7e14 | 1872 | static void |
5976c3fe | 1873 | barf_or_query_if_file_exists (Lisp_Object absname, const char *querystring, |
f75d7a91 PE |
1874 | bool interactive, struct stat *statptr, |
1875 | bool quick) | |
570d7624 | 1876 | { |
f75d7a91 | 1877 | Lisp_Object tem, encoded_filename; |
4018b5ef | 1878 | struct stat statbuf; |
570d7624 JB |
1879 | struct gcpro gcpro1; |
1880 | ||
643c73b9 RS |
1881 | encoded_filename = ENCODE_FILE (absname); |
1882 | ||
e8d32c7e | 1883 | /* `stat' is a good way to tell whether the file exists, |
4018b5ef | 1884 | regardless of what access permissions it has. */ |
42a5b22f | 1885 | if (lstat (SSDATA (encoded_filename), &statbuf) >= 0) |
570d7624 | 1886 | { |
6e9b2be9 | 1887 | if (S_ISDIR (statbuf.st_mode)) |
c4f2d8d4 | 1888 | xsignal2 (Qfile_error, |
ad637907 | 1889 | build_string ("File is a directory"), absname); |
c4f2d8d4 | 1890 | |
570d7624 | 1891 | if (! interactive) |
24b1ddad KS |
1892 | xsignal2 (Qfile_already_exists, |
1893 | build_string ("File already exists"), absname); | |
570d7624 | 1894 | GCPRO1 (absname); |
67e8e2b8 RS |
1895 | tem = format2 ("File %s already exists; %s anyway? ", |
1896 | absname, build_string (querystring)); | |
b8b29dc9 | 1897 | if (quick) |
5616cc54 | 1898 | tem = call1 (intern ("y-or-n-p"), tem); |
b8b29dc9 RS |
1899 | else |
1900 | tem = do_yes_or_no_p (tem); | |
570d7624 | 1901 | UNGCPRO; |
265a9e55 | 1902 | if (NILP (tem)) |
24b1ddad KS |
1903 | xsignal2 (Qfile_already_exists, |
1904 | build_string ("File already exists"), absname); | |
3ed15d97 RS |
1905 | if (statptr) |
1906 | *statptr = statbuf; | |
1907 | } | |
1908 | else | |
1909 | { | |
1910 | if (statptr) | |
1911 | statptr->st_mode = 0; | |
570d7624 JB |
1912 | } |
1913 | return; | |
1914 | } | |
1915 | ||
574c05e2 | 1916 | DEFUN ("copy-file", Fcopy_file, Scopy_file, 2, 6, |
7c0f6118 | 1917 | "fCopy file: \nGCopy %s to file: \np\nP", |
8c1a1077 PJ |
1918 | doc: /* Copy FILE to NEWNAME. Both args must be strings. |
1919 | If NEWNAME names a directory, copy FILE there. | |
795c20df CY |
1920 | |
1921 | This function always sets the file modes of the output file to match | |
1922 | the input file. | |
1923 | ||
1924 | The optional third argument OK-IF-ALREADY-EXISTS specifies what to do | |
1925 | if file NEWNAME already exists. If OK-IF-ALREADY-EXISTS is nil, we | |
1926 | signal a `file-already-exists' error without overwriting. If | |
1927 | OK-IF-ALREADY-EXISTS is a number, we request confirmation from the user | |
1928 | about overwriting; this is what happens in interactive use with M-x. | |
1929 | Any other value for OK-IF-ALREADY-EXISTS means to overwrite the | |
1930 | existing file. | |
c50f15d0 | 1931 | |
7f08b80e | 1932 | Fourth arg KEEP-TIME non-nil means give the output file the same |
8c1a1077 | 1933 | last-modified time as the old one. (This works on only some systems.) |
c50f15d0 | 1934 | |
7fce7dfe EZ |
1935 | A prefix arg makes KEEP-TIME non-nil. |
1936 | ||
586702ce | 1937 | If PRESERVE-UID-GID is non-nil, we try to transfer the |
574c05e2 KK |
1938 | uid and gid of FILE to NEWNAME. |
1939 | ||
7c3d167f RF |
1940 | If PRESERVE-EXTENDED-ATTRIBUTES is non-nil, we try to copy additional |
1941 | attributes of FILE to NEWNAME, such as its SELinux context and ACL | |
1942 | entries (depending on how Emacs was built). */) | |
1943 | (Lisp_Object file, Lisp_Object newname, Lisp_Object ok_if_already_exists, Lisp_Object keep_time, Lisp_Object preserve_uid_gid, Lisp_Object preserve_extended_attributes) | |
570d7624 | 1944 | { |
8a2cbd72 | 1945 | int ifd, ofd; |
d311d28c | 1946 | int n; |
570d7624 | 1947 | char buf[16 * 1024]; |
3ed15d97 | 1948 | struct stat st, out_st; |
32f4334d | 1949 | Lisp_Object handler; |
b1d1b865 | 1950 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; |
d311d28c | 1951 | ptrdiff_t count = SPECPDL_INDEX (); |
b1d1b865 | 1952 | Lisp_Object encoded_file, encoded_newname; |
574c05e2 KK |
1953 | #if HAVE_LIBSELINUX |
1954 | security_context_t con; | |
f75d7a91 | 1955 | int conlength = 0; |
574c05e2 | 1956 | #endif |
ffdc270a | 1957 | #ifdef WINDOWSNT |
ec4440cf | 1958 | int result; |
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, | |
7c3d167f | 1982 | preserve_extended_attributes)); |
32f4334d | 1983 | |
b1d1b865 RS |
1984 | encoded_file = ENCODE_FILE (file); |
1985 | encoded_newname = ENCODE_FILE (newname); | |
1986 | ||
265a9e55 | 1987 | if (NILP (ok_if_already_exists) |
93c30b5f | 1988 | || INTEGERP (ok_if_already_exists)) |
2f868094 | 1989 | barf_or_query_if_file_exists (newname, "copy to it", |
b8b29dc9 | 1990 | INTEGERP (ok_if_already_exists), &out_st, 0); |
42a5b22f | 1991 | else if (stat (SSDATA (encoded_newname), &out_st) < 0) |
3ed15d97 | 1992 | out_st.st_mode = 0; |
570d7624 | 1993 | |
e8691c59 | 1994 | #ifdef WINDOWSNT |
ec4440cf EZ |
1995 | result = w32_copy_file (SSDATA (encoded_file), SSDATA (encoded_newname), |
1996 | !NILP (keep_time), !NILP (preserve_uid_gid), | |
1997 | !NILP (preserve_extended_attributes)); | |
1998 | switch (result) | |
66447e07 | 1999 | { |
ec4440cf EZ |
2000 | case -1: |
2001 | report_file_error ("Copying file", list2 (file, newname)); | |
2002 | case -2: | |
2003 | report_file_error ("Copying permissions from", file); | |
2004 | case -3: | |
2005 | xsignal2 (Qfile_date_error, | |
2006 | build_string ("Resetting file times"), newname); | |
2007 | case -4: | |
2008 | report_file_error ("Copying permissions to", newname); | |
66447e07 | 2009 | } |
e8691c59 | 2010 | #else /* not WINDOWSNT */ |
13336908 | 2011 | immediate_quit = 1; |
42a5b22f | 2012 | ifd = emacs_open (SSDATA (encoded_file), O_RDONLY, 0); |
13336908 RS |
2013 | immediate_quit = 0; |
2014 | ||
570d7624 | 2015 | if (ifd < 0) |
a9757f6a | 2016 | report_file_error ("Opening input file", file); |
570d7624 | 2017 | |
27e498e6 | 2018 | record_unwind_protect_int (close_file_unwind, ifd); |
b5148e85 | 2019 | |
d20704ef | 2020 | if (fstat (ifd, &st) != 0) |
a9757f6a | 2021 | report_file_error ("Input file status", file); |
f73b0ada | 2022 | |
7c3d167f | 2023 | if (!NILP (preserve_extended_attributes)) |
574c05e2 | 2024 | { |
7c3d167f RF |
2025 | #if HAVE_LIBSELINUX |
2026 | if (is_selinux_enabled ()) | |
2027 | { | |
2028 | conlength = fgetfilecon (ifd, &con); | |
2029 | if (conlength == -1) | |
a9757f6a | 2030 | report_file_error ("Doing fgetfilecon", file); |
7c3d167f RF |
2031 | } |
2032 | #endif | |
7c3d167f | 2033 | } |
574c05e2 | 2034 | |
3ed15d97 RS |
2035 | if (out_st.st_mode != 0 |
2036 | && st.st_dev == out_st.st_dev && st.st_ino == out_st.st_ino) | |
a773ed9a | 2037 | report_file_errno ("Input and output files are the same", |
6c6f1994 | 2038 | list2 (file, newname), 0); |
3ed15d97 | 2039 | |
d20704ef PE |
2040 | /* We can copy only regular files. */ |
2041 | if (!S_ISREG (st.st_mode)) | |
a9757f6a | 2042 | report_file_errno ("Non-regular file", file, |
a773ed9a | 2043 | S_ISDIR (st.st_mode) ? EISDIR : EINVAL); |
f73b0ada | 2044 | |
15e3a074 | 2045 | { |
a773ed9a PE |
2046 | #ifndef MSDOS |
2047 | int new_mask = st.st_mode & (!NILP (preserve_uid_gid) ? 0600 : 0666); | |
2048 | #else | |
2049 | int new_mask = S_IREAD | S_IWRITE; | |
2050 | #endif | |
15e3a074 PE |
2051 | ofd = emacs_open (SSDATA (encoded_newname), |
2052 | (O_WRONLY | O_TRUNC | O_CREAT | |
2053 | | (NILP (ok_if_already_exists) ? O_EXCL : 0)), | |
2054 | new_mask); | |
2055 | } | |
570d7624 | 2056 | if (ofd < 0) |
a9757f6a | 2057 | report_file_error ("Opening output file", newname); |
b5148e85 | 2058 | |
27e498e6 | 2059 | record_unwind_protect_int (close_file_unwind, ofd); |
570d7624 | 2060 | |
b5148e85 RS |
2061 | immediate_quit = 1; |
2062 | QUIT; | |
68c45bf0 | 2063 | while ((n = emacs_read (ifd, buf, sizeof buf)) > 0) |
4ebbdd67 | 2064 | if (emacs_write_sig (ofd, buf, n) != n) |
4e604a5d | 2065 | report_file_error ("Write error", newname); |
b5148e85 | 2066 | immediate_quit = 0; |
570d7624 | 2067 | |
b016179b | 2068 | #ifndef MSDOS |
ffdc270a | 2069 | /* Preserve the original file permissions, and if requested, also its |
b016179b | 2070 | owner and group. */ |
d20704ef PE |
2071 | { |
2072 | mode_t mode_mask = 07777; | |
2073 | if (!NILP (preserve_uid_gid)) | |
2074 | { | |
2075 | /* Attempt to change owner and group. If that doesn't work | |
2076 | attempt to change just the group, as that is sometimes allowed. | |
2077 | Adjust the mode mask to eliminate setuid or setgid bits | |
2078 | that are inappropriate if the owner and group are wrong. */ | |
2079 | if (fchown (ofd, st.st_uid, st.st_gid) != 0) | |
2080 | { | |
2081 | mode_mask &= ~06000; | |
2082 | if (fchown (ofd, -1, st.st_gid) == 0) | |
2083 | mode_mask |= 02000; | |
2084 | } | |
2085 | } | |
ffdc270a PE |
2086 | |
2087 | switch (!NILP (preserve_extended_attributes) | |
2088 | ? qcopy_acl (SSDATA (encoded_file), ifd, | |
2089 | SSDATA (encoded_newname), ofd, | |
2090 | st.st_mode & mode_mask) | |
2091 | : fchmod (ofd, st.st_mode & mode_mask)) | |
2092 | { | |
a9757f6a PE |
2093 | case -2: report_file_error ("Copying permissions from", file); |
2094 | case -1: report_file_error ("Copying permissions to", newname); | |
ffdc270a | 2095 | } |
d20704ef | 2096 | } |
b016179b | 2097 | #endif /* not MSDOS */ |
586702ce | 2098 | |
574c05e2 KK |
2099 | #if HAVE_LIBSELINUX |
2100 | if (conlength > 0) | |
2101 | { | |
24c51a09 | 2102 | /* Set the modified context back to the file. */ |
f75d7a91 | 2103 | bool fail = fsetfilecon (ofd, con) != 0; |
24c51a09 GM |
2104 | /* See http://debbugs.gnu.org/11245 for ENOTSUP. */ |
2105 | if (fail && errno != ENOTSUP) | |
a9757f6a | 2106 | report_file_error ("Doing fsetfilecon", newname); |
574c05e2 KK |
2107 | |
2108 | freecon (con); | |
2109 | } | |
2110 | #endif | |
2111 | ||
d20704ef | 2112 | if (!NILP (keep_time)) |
570d7624 | 2113 | { |
43aac990 PE |
2114 | struct timespec atime = get_stat_atime (&st); |
2115 | struct timespec mtime = get_stat_mtime (&st); | |
96c06863 | 2116 | if (set_file_times (ofd, SSDATA (encoded_newname), atime, mtime) != 0) |
d20704ef PE |
2117 | xsignal2 (Qfile_date_error, |
2118 | build_string ("Cannot set file date"), newname); | |
570d7624 JB |
2119 | } |
2120 | ||
d35af63c | 2121 | if (emacs_close (ofd) < 0) |
4e604a5d | 2122 | report_file_error ("Write error", newname); |
d35af63c | 2123 | |
68c45bf0 | 2124 | emacs_close (ifd); |
b016179b | 2125 | |
ed68db4d | 2126 | #ifdef MSDOS |
d20704ef PE |
2127 | /* In DJGPP v2.0 and later, fstat usually returns true file mode bits, |
2128 | and if it can't, it tells so. Otherwise, under MSDOS we usually | |
2129 | get only the READ bit, which will make the copied file read-only, | |
2130 | so it's better not to chmod at all. */ | |
2131 | if ((_djstat_flags & _STFAIL_WRITEBIT) == 0) | |
2132 | chmod (SDATA (encoded_newname), st.st_mode & 07777); | |
ed68db4d | 2133 | #endif /* MSDOS */ |
b016179b | 2134 | #endif /* not WINDOWSNT */ |
5acac34e | 2135 | |
b5148e85 RS |
2136 | /* Discard the unwind protects. */ |
2137 | specpdl_ptr = specpdl + count; | |
2138 | ||
570d7624 JB |
2139 | UNGCPRO; |
2140 | return Qnil; | |
2141 | } | |
385b6cc7 | 2142 | \f |
9bbe01fb | 2143 | DEFUN ("make-directory-internal", Fmake_directory_internal, |
353cfc19 | 2144 | Smake_directory_internal, 1, 1, 0, |
8c1a1077 | 2145 | doc: /* Create a new directory named DIRECTORY. */) |
5842a27b | 2146 | (Lisp_Object directory) |
570d7624 | 2147 | { |
5976c3fe | 2148 | const char *dir; |
32f4334d | 2149 | Lisp_Object handler; |
b1d1b865 | 2150 | Lisp_Object encoded_dir; |
570d7624 | 2151 | |
b7826503 | 2152 | CHECK_STRING (directory); |
3b7f6e60 | 2153 | directory = Fexpand_file_name (directory, Qnil); |
32f4334d | 2154 | |
3b7f6e60 | 2155 | handler = Ffind_file_name_handler (directory, Qmake_directory_internal); |
32f4334d | 2156 | if (!NILP (handler)) |
3b7f6e60 | 2157 | return call2 (handler, Qmake_directory_internal, directory); |
9bbe01fb | 2158 | |
b1d1b865 RS |
2159 | encoded_dir = ENCODE_FILE (directory); |
2160 | ||
5976c3fe | 2161 | dir = SSDATA (encoded_dir); |
570d7624 | 2162 | |
5e570b75 RS |
2163 | #ifdef WINDOWSNT |
2164 | if (mkdir (dir) != 0) | |
2165 | #else | |
09450bae | 2166 | if (mkdir (dir, 0777 & ~auto_saving_dir_umask) != 0) |
5e570b75 | 2167 | #endif |
a9757f6a | 2168 | report_file_error ("Creating directory", directory); |
570d7624 | 2169 | |
32f4334d | 2170 | return Qnil; |
570d7624 JB |
2171 | } |
2172 | ||
9d8f3bd9 MA |
2173 | DEFUN ("delete-directory-internal", Fdelete_directory_internal, |
2174 | Sdelete_directory_internal, 1, 1, 0, | |
efdc16c9 | 2175 | doc: /* Delete the directory named DIRECTORY. Does not follow symlinks. */) |
5842a27b | 2176 | (Lisp_Object directory) |
570d7624 | 2177 | { |
5976c3fe | 2178 | const char *dir; |
b1d1b865 | 2179 | Lisp_Object encoded_dir; |
570d7624 | 2180 | |
b7826503 | 2181 | CHECK_STRING (directory); |
3b7f6e60 | 2182 | directory = Fdirectory_file_name (Fexpand_file_name (directory, Qnil)); |
b1d1b865 | 2183 | encoded_dir = ENCODE_FILE (directory); |
5976c3fe | 2184 | dir = SSDATA (encoded_dir); |
b1d1b865 | 2185 | |
570d7624 | 2186 | if (rmdir (dir) != 0) |
a9757f6a | 2187 | report_file_error ("Removing directory", directory); |
570d7624 JB |
2188 | |
2189 | return Qnil; | |
2190 | } | |
2191 | ||
2e2bbddb | 2192 | DEFUN ("delete-file", Fdelete_file, Sdelete_file, 1, 2, |
f1a5d776 CY |
2193 | "(list (read-file-name \ |
2194 | (if (and delete-by-moving-to-trash (null current-prefix-arg)) \ | |
2195 | \"Move file to trash: \" \"Delete file: \") \ | |
2196 | nil default-directory (confirm-nonexistent-file-or-buffer)) \ | |
2197 | (null current-prefix-arg))", | |
efdc16c9 | 2198 | doc: /* Delete file named FILENAME. If it is a symlink, remove the symlink. |
53967e09 | 2199 | If file has multiple names, it continues to exist with the other names. |
f1a5d776 CY |
2200 | TRASH non-nil means to trash the file instead of deleting, provided |
2201 | `delete-by-moving-to-trash' is non-nil. | |
53967e09 | 2202 | |
f1a5d776 CY |
2203 | When called interactively, TRASH is t if no prefix argument is given. |
2204 | With a prefix argument, TRASH is nil. */) | |
5842a27b | 2205 | (Lisp_Object filename, Lisp_Object trash) |
570d7624 | 2206 | { |
32f4334d | 2207 | Lisp_Object handler; |
b1d1b865 | 2208 | Lisp_Object encoded_file; |
efdc16c9 | 2209 | struct gcpro gcpro1; |
b1d1b865 | 2210 | |
efdc16c9 | 2211 | GCPRO1 (filename); |
b4bd27c5 RS |
2212 | if (!NILP (Ffile_directory_p (filename)) |
2213 | && NILP (Ffile_symlink_p (filename))) | |
24b1ddad KS |
2214 | xsignal2 (Qfile_error, |
2215 | build_string ("Removing old name: is a directory"), | |
2216 | filename); | |
efdc16c9 | 2217 | UNGCPRO; |
570d7624 | 2218 | filename = Fexpand_file_name (filename, Qnil); |
32f4334d | 2219 | |
49307295 | 2220 | handler = Ffind_file_name_handler (filename, Qdelete_file); |
32f4334d | 2221 | if (!NILP (handler)) |
f5783df3 | 2222 | return call3 (handler, Qdelete_file, filename, trash); |
32f4334d | 2223 | |
f1a5d776 | 2224 | if (delete_by_moving_to_trash && !NILP (trash)) |
6cf29fe8 JR |
2225 | return call1 (Qmove_file_to_trash, filename); |
2226 | ||
b1d1b865 RS |
2227 | encoded_file = ENCODE_FILE (filename); |
2228 | ||
ce2fe65a | 2229 | if (unlink (SSDATA (encoded_file)) < 0) |
a9757f6a | 2230 | report_file_error ("Removing old name", filename); |
8a9b0da9 | 2231 | return Qnil; |
570d7624 JB |
2232 | } |
2233 | ||
385b6cc7 | 2234 | static Lisp_Object |
971de7fb | 2235 | internal_delete_file_1 (Lisp_Object ignore) |
385b6cc7 RS |
2236 | { |
2237 | return Qt; | |
2238 | } | |
2239 | ||
7d80ea23 | 2240 | /* Delete file FILENAME, returning true if successful. |
f1a5d776 | 2241 | This ignores `delete-by-moving-to-trash'. */ |
385b6cc7 | 2242 | |
7d80ea23 | 2243 | bool |
f1a5d776 | 2244 | internal_delete_file (Lisp_Object filename) |
385b6cc7 | 2245 | { |
b0728617 EZ |
2246 | Lisp_Object tem; |
2247 | ||
2248 | tem = internal_condition_case_2 (Fdelete_file, filename, Qnil, | |
2249 | Qt, internal_delete_file_1); | |
2250 | return NILP (tem); | |
385b6cc7 RS |
2251 | } |
2252 | \f | |
570d7624 | 2253 | DEFUN ("rename-file", Frename_file, Srename_file, 2, 3, |
7c0f6118 | 2254 | "fRename file: \nGRename %s to file: \np", |
a4e03fe5 | 2255 | doc: /* Rename FILE as NEWNAME. Both args must be strings. |
8c1a1077 PJ |
2256 | If file has names other than FILE, it continues to have those names. |
2257 | Signals a `file-already-exists' error if a file NEWNAME already exists | |
2258 | unless optional third argument OK-IF-ALREADY-EXISTS is non-nil. | |
2259 | A number as third arg means request confirmation if NEWNAME already exists. | |
2260 | This is what happens in interactive use with M-x. */) | |
5842a27b | 2261 | (Lisp_Object file, Lisp_Object newname, Lisp_Object ok_if_already_exists) |
570d7624 | 2262 | { |
32f4334d | 2263 | Lisp_Object handler; |
f72b5416 JD |
2264 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4, gcpro5; |
2265 | Lisp_Object encoded_file, encoded_newname, symlink_target; | |
570d7624 | 2266 | |
f72b5416 JD |
2267 | symlink_target = encoded_file = encoded_newname = Qnil; |
2268 | GCPRO5 (file, newname, encoded_file, encoded_newname, symlink_target); | |
b7826503 PJ |
2269 | CHECK_STRING (file); |
2270 | CHECK_STRING (newname); | |
3b7f6e60 | 2271 | file = Fexpand_file_name (file, Qnil); |
1ffc5c90 | 2272 | |
f83caf70 EZ |
2273 | if ((!NILP (Ffile_directory_p (newname))) |
2274 | #ifdef DOS_NT | |
2275 | /* If the file names are identical but for the case, | |
2276 | don't attempt to move directory to itself. */ | |
2277 | && (NILP (Fstring_equal (Fdowncase (file), Fdowncase (newname)))) | |
2278 | #endif | |
2279 | ) | |
8719abec | 2280 | { |
ce2fe65a AS |
2281 | Lisp_Object fname = (NILP (Ffile_directory_p (file)) |
2282 | ? file : Fdirectory_file_name (file)); | |
8719abec CY |
2283 | newname = Fexpand_file_name (Ffile_name_nondirectory (fname), newname); |
2284 | } | |
1ffc5c90 RS |
2285 | else |
2286 | newname = Fexpand_file_name (newname, Qnil); | |
32f4334d RS |
2287 | |
2288 | /* If the file name has special constructs in it, | |
2289 | call the corresponding file handler. */ | |
3b7f6e60 | 2290 | handler = Ffind_file_name_handler (file, Qrename_file); |
51cf6d37 | 2291 | if (NILP (handler)) |
49307295 | 2292 | handler = Ffind_file_name_handler (newname, Qrename_file); |
32f4334d | 2293 | if (!NILP (handler)) |
36712b0a | 2294 | RETURN_UNGCPRO (call4 (handler, Qrename_file, |
3b7f6e60 | 2295 | file, newname, ok_if_already_exists)); |
32f4334d | 2296 | |
b1d1b865 RS |
2297 | encoded_file = ENCODE_FILE (file); |
2298 | encoded_newname = ENCODE_FILE (newname); | |
2299 | ||
bc77278f EZ |
2300 | #ifdef DOS_NT |
2301 | /* If the file names are identical but for the case, don't ask for | |
2302 | confirmation: they simply want to change the letter-case of the | |
2303 | file name. */ | |
2304 | if (NILP (Fstring_equal (Fdowncase (file), Fdowncase (newname)))) | |
2305 | #endif | |
265a9e55 | 2306 | if (NILP (ok_if_already_exists) |
93c30b5f | 2307 | || INTEGERP (ok_if_already_exists)) |
2f868094 | 2308 | barf_or_query_if_file_exists (newname, "rename to it", |
b8b29dc9 | 2309 | INTEGERP (ok_if_already_exists), 0, 0); |
ce2fe65a | 2310 | if (rename (SSDATA (encoded_file), SSDATA (encoded_newname)) < 0) |
570d7624 | 2311 | { |
b648c163 PE |
2312 | int rename_errno = errno; |
2313 | if (rename_errno == EXDEV) | |
570d7624 | 2314 | { |
d311d28c | 2315 | ptrdiff_t count; |
f72b5416 | 2316 | symlink_target = Ffile_symlink_p (file); |
440c7d00 JD |
2317 | if (! NILP (symlink_target)) |
2318 | Fmake_symbolic_link (symlink_target, newname, | |
f59abab9 | 2319 | NILP (ok_if_already_exists) ? Qnil : Qt); |
ae0d7250 | 2320 | else if (!NILP (Ffile_directory_p (file))) |
8719abec CY |
2321 | call4 (Qcopy_directory, file, newname, Qt, Qnil); |
2322 | else | |
2323 | /* We have already prompted if it was an integer, so don't | |
2324 | have copy-file prompt again. */ | |
586702ce | 2325 | Fcopy_file (file, newname, |
586702ce | 2326 | NILP (ok_if_already_exists) ? Qnil : Qt, |
574c05e2 | 2327 | Qt, Qt, Qt); |
d550c425 | 2328 | |
6bddfc97 | 2329 | count = SPECPDL_INDEX (); |
d2b66acf | 2330 | specbind (Qdelete_by_moving_to_trash, Qnil); |
8fab2362 | 2331 | |
ae0d7250 | 2332 | if (!NILP (Ffile_directory_p (file)) && NILP (symlink_target)) |
8719abec CY |
2333 | call2 (Qdelete_directory, file, Qt); |
2334 | else | |
f1a5d776 | 2335 | Fdelete_file (file, Qnil); |
6bddfc97 | 2336 | unbind_to (count, Qnil); |
570d7624 JB |
2337 | } |
2338 | else | |
b648c163 | 2339 | report_file_errno ("Renaming", list2 (file, newname), rename_errno); |
570d7624 JB |
2340 | } |
2341 | UNGCPRO; | |
2342 | return Qnil; | |
2343 | } | |
2344 | ||
2345 | DEFUN ("add-name-to-file", Fadd_name_to_file, Sadd_name_to_file, 2, 3, | |
7c0f6118 | 2346 | "fAdd name to file: \nGName to add to %s: \np", |
a4e03fe5 | 2347 | doc: /* Give FILE additional name NEWNAME. Both args must be strings. |
8c1a1077 PJ |
2348 | Signals a `file-already-exists' error if a file NEWNAME already exists |
2349 | unless optional third argument OK-IF-ALREADY-EXISTS is non-nil. | |
2350 | A number as third arg means request confirmation if NEWNAME already exists. | |
2351 | This is what happens in interactive use with M-x. */) | |
5842a27b | 2352 | (Lisp_Object file, Lisp_Object newname, Lisp_Object ok_if_already_exists) |
570d7624 | 2353 | { |
32f4334d | 2354 | Lisp_Object handler; |
b1d1b865 RS |
2355 | Lisp_Object encoded_file, encoded_newname; |
2356 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; | |
570d7624 | 2357 | |
b1d1b865 RS |
2358 | GCPRO4 (file, newname, encoded_file, encoded_newname); |
2359 | encoded_file = encoded_newname = Qnil; | |
b7826503 PJ |
2360 | CHECK_STRING (file); |
2361 | CHECK_STRING (newname); | |
3b7f6e60 | 2362 | file = Fexpand_file_name (file, Qnil); |
1ffc5c90 RS |
2363 | |
2364 | if (!NILP (Ffile_directory_p (newname))) | |
2365 | newname = Fexpand_file_name (Ffile_name_nondirectory (file), newname); | |
2366 | else | |
2367 | newname = Fexpand_file_name (newname, Qnil); | |
32f4334d RS |
2368 | |
2369 | /* If the file name has special constructs in it, | |
2370 | call the corresponding file handler. */ | |
3b7f6e60 | 2371 | handler = Ffind_file_name_handler (file, Qadd_name_to_file); |
32f4334d | 2372 | if (!NILP (handler)) |
3b7f6e60 | 2373 | RETURN_UNGCPRO (call4 (handler, Qadd_name_to_file, file, |
36712b0a | 2374 | newname, ok_if_already_exists)); |
32f4334d | 2375 | |
adc6741c RS |
2376 | /* If the new name has special constructs in it, |
2377 | call the corresponding file handler. */ | |
2378 | handler = Ffind_file_name_handler (newname, Qadd_name_to_file); | |
2379 | if (!NILP (handler)) | |
3b7f6e60 | 2380 | RETURN_UNGCPRO (call4 (handler, Qadd_name_to_file, file, |
adc6741c RS |
2381 | newname, ok_if_already_exists)); |
2382 | ||
b1d1b865 RS |
2383 | encoded_file = ENCODE_FILE (file); |
2384 | encoded_newname = ENCODE_FILE (newname); | |
2385 | ||
265a9e55 | 2386 | if (NILP (ok_if_already_exists) |
93c30b5f | 2387 | || INTEGERP (ok_if_already_exists)) |
2f868094 | 2388 | barf_or_query_if_file_exists (newname, "make it a new name", |
b8b29dc9 | 2389 | INTEGERP (ok_if_already_exists), 0, 0); |
5e570b75 | 2390 | |
42a5b22f | 2391 | unlink (SSDATA (newname)); |
ce2fe65a | 2392 | if (link (SSDATA (encoded_file), SSDATA (encoded_newname)) < 0) |
b648c163 PE |
2393 | { |
2394 | int link_errno = errno; | |
2395 | report_file_errno ("Adding new name", list2 (file, newname), link_errno); | |
2396 | } | |
570d7624 JB |
2397 | |
2398 | UNGCPRO; | |
2399 | return Qnil; | |
2400 | } | |
2401 | ||
570d7624 | 2402 | DEFUN ("make-symbolic-link", Fmake_symbolic_link, Smake_symbolic_link, 2, 3, |
7c0f6118 | 2403 | "FMake symbolic link to file: \nGMake symbolic link to file %s: \np", |
68780e2a RS |
2404 | doc: /* Make a symbolic link to FILENAME, named LINKNAME. |
2405 | Both args must be strings. | |
8c1a1077 PJ |
2406 | Signals a `file-already-exists' error if a file LINKNAME already exists |
2407 | unless optional third argument OK-IF-ALREADY-EXISTS is non-nil. | |
2408 | A number as third arg means request confirmation if LINKNAME already exists. | |
2409 | This happens for interactive use with M-x. */) | |
5842a27b | 2410 | (Lisp_Object filename, Lisp_Object linkname, Lisp_Object ok_if_already_exists) |
570d7624 | 2411 | { |
32f4334d | 2412 | Lisp_Object handler; |
b1d1b865 RS |
2413 | Lisp_Object encoded_filename, encoded_linkname; |
2414 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; | |
570d7624 | 2415 | |
b1d1b865 RS |
2416 | GCPRO4 (filename, linkname, encoded_filename, encoded_linkname); |
2417 | encoded_filename = encoded_linkname = Qnil; | |
b7826503 PJ |
2418 | CHECK_STRING (filename); |
2419 | CHECK_STRING (linkname); | |
d9bc1c99 RS |
2420 | /* If the link target has a ~, we must expand it to get |
2421 | a truly valid file name. Otherwise, do not expand; | |
2422 | we want to permit links to relative file names. */ | |
d5db4077 | 2423 | if (SREF (filename, 0) == '~') |
d9bc1c99 | 2424 | filename = Fexpand_file_name (filename, Qnil); |
1ffc5c90 RS |
2425 | |
2426 | if (!NILP (Ffile_directory_p (linkname))) | |
dac24db4 | 2427 | linkname = Fexpand_file_name (Ffile_name_nondirectory (filename), linkname); |
1ffc5c90 RS |
2428 | else |
2429 | linkname = Fexpand_file_name (linkname, Qnil); | |
32f4334d RS |
2430 | |
2431 | /* If the file name has special constructs in it, | |
2432 | call the corresponding file handler. */ | |
49307295 | 2433 | handler = Ffind_file_name_handler (filename, Qmake_symbolic_link); |
32f4334d | 2434 | if (!NILP (handler)) |
36712b0a KH |
2435 | RETURN_UNGCPRO (call4 (handler, Qmake_symbolic_link, filename, |
2436 | linkname, ok_if_already_exists)); | |
32f4334d | 2437 | |
adc6741c RS |
2438 | /* If the new link name has special constructs in it, |
2439 | call the corresponding file handler. */ | |
2440 | handler = Ffind_file_name_handler (linkname, Qmake_symbolic_link); | |
2441 | if (!NILP (handler)) | |
2442 | RETURN_UNGCPRO (call4 (handler, Qmake_symbolic_link, filename, | |
2443 | linkname, ok_if_already_exists)); | |
2444 | ||
b1d1b865 RS |
2445 | encoded_filename = ENCODE_FILE (filename); |
2446 | encoded_linkname = ENCODE_FILE (linkname); | |
2447 | ||
265a9e55 | 2448 | if (NILP (ok_if_already_exists) |
93c30b5f | 2449 | || INTEGERP (ok_if_already_exists)) |
2f868094 | 2450 | barf_or_query_if_file_exists (linkname, "make it a link", |
b8b29dc9 | 2451 | INTEGERP (ok_if_already_exists), 0, 0); |
ce2fe65a | 2452 | if (symlink (SSDATA (encoded_filename), SSDATA (encoded_linkname)) < 0) |
570d7624 JB |
2453 | { |
2454 | /* If we didn't complain already, silently delete existing file. */ | |
b648c163 | 2455 | int symlink_errno; |
570d7624 JB |
2456 | if (errno == EEXIST) |
2457 | { | |
42a5b22f | 2458 | unlink (SSDATA (encoded_linkname)); |
ce2fe65a AS |
2459 | if (symlink (SSDATA (encoded_filename), SSDATA (encoded_linkname)) |
2460 | >= 0) | |
1a04498e KH |
2461 | { |
2462 | UNGCPRO; | |
2463 | return Qnil; | |
2464 | } | |
570d7624 | 2465 | } |
d9d0d182 PE |
2466 | if (errno == ENOSYS) |
2467 | { | |
2468 | UNGCPRO; | |
2469 | xsignal1 (Qfile_error, | |
2470 | build_string ("Symbolic links are not supported")); | |
2471 | } | |
570d7624 | 2472 | |
b648c163 PE |
2473 | symlink_errno = errno; |
2474 | report_file_errno ("Making symbolic link", list2 (filename, linkname), | |
2475 | symlink_errno); | |
570d7624 JB |
2476 | } |
2477 | UNGCPRO; | |
2478 | return Qnil; | |
e89b536d | 2479 | } |
570d7624 | 2480 | |
570d7624 | 2481 | \f |
a7ca3326 | 2482 | DEFUN ("file-name-absolute-p", Ffile_name_absolute_p, Sfile_name_absolute_p, |
570d7624 | 2483 | 1, 1, 0, |
8c1a1077 PJ |
2484 | doc: /* Return t if file FILENAME specifies an absolute file name. |
2485 | On Unix, this is a name starting with a `/' or a `~'. */) | |
5842a27b | 2486 | (Lisp_Object filename) |
570d7624 | 2487 | { |
b7826503 | 2488 | CHECK_STRING (filename); |
5976c3fe | 2489 | return file_name_absolute_p (SSDATA (filename)) ? Qt : Qnil; |
570d7624 | 2490 | } |
3beeedfe | 2491 | \f |
a7ca3326 | 2492 | DEFUN ("file-exists-p", Ffile_exists_p, Sfile_exists_p, 1, 1, 0, |
68780e2a RS |
2493 | doc: /* Return t if file FILENAME exists (whether or not you can read it.) |
2494 | See also `file-readable-p' and `file-attributes'. | |
2495 | This returns nil for a symlink to a nonexistent file. | |
2496 | Use `file-symlink-p' to test for such links. */) | |
5842a27b | 2497 | (Lisp_Object filename) |
570d7624 | 2498 | { |
199607e4 | 2499 | Lisp_Object absname; |
32f4334d | 2500 | Lisp_Object handler; |
570d7624 | 2501 | |
b7826503 | 2502 | CHECK_STRING (filename); |
199607e4 | 2503 | absname = Fexpand_file_name (filename, Qnil); |
32f4334d RS |
2504 | |
2505 | /* If the file name has special constructs in it, | |
2506 | call the corresponding file handler. */ | |
199607e4 | 2507 | handler = Ffind_file_name_handler (absname, Qfile_exists_p); |
32f4334d | 2508 | if (!NILP (handler)) |
a773ed9a PE |
2509 | { |
2510 | Lisp_Object result = call2 (handler, Qfile_exists_p, absname); | |
2511 | errno = 0; | |
2512 | return result; | |
2513 | } | |
32f4334d | 2514 | |
b1d1b865 RS |
2515 | absname = ENCODE_FILE (absname); |
2516 | ||
3d798ba7 | 2517 | return check_existing (SSDATA (absname)) ? Qt : Qnil; |
570d7624 JB |
2518 | } |
2519 | ||
2520 | DEFUN ("file-executable-p", Ffile_executable_p, Sfile_executable_p, 1, 1, 0, | |
8c1a1077 PJ |
2521 | doc: /* Return t if FILENAME can be executed by you. |
2522 | For a directory, this means you can access files in that directory. */) | |
5842a27b | 2523 | (Lisp_Object filename) |
570d7624 | 2524 | { |
199607e4 | 2525 | Lisp_Object absname; |
32f4334d | 2526 | Lisp_Object handler; |
570d7624 | 2527 | |
b7826503 | 2528 | CHECK_STRING (filename); |
199607e4 | 2529 | absname = Fexpand_file_name (filename, Qnil); |
32f4334d RS |
2530 | |
2531 | /* If the file name has special constructs in it, | |
2532 | call the corresponding file handler. */ | |
199607e4 | 2533 | handler = Ffind_file_name_handler (absname, Qfile_executable_p); |
32f4334d | 2534 | if (!NILP (handler)) |
199607e4 | 2535 | return call2 (handler, Qfile_executable_p, absname); |
32f4334d | 2536 | |
b1d1b865 RS |
2537 | absname = ENCODE_FILE (absname); |
2538 | ||
42a5b22f | 2539 | return (check_executable (SSDATA (absname)) ? Qt : Qnil); |
570d7624 JB |
2540 | } |
2541 | ||
a7ca3326 | 2542 | DEFUN ("file-readable-p", Ffile_readable_p, Sfile_readable_p, 1, 1, 0, |
8c1a1077 PJ |
2543 | doc: /* Return t if file FILENAME exists and you can read it. |
2544 | See also `file-exists-p' and `file-attributes'. */) | |
5842a27b | 2545 | (Lisp_Object filename) |
570d7624 | 2546 | { |
199607e4 | 2547 | Lisp_Object absname; |
32f4334d | 2548 | Lisp_Object handler; |
570d7624 | 2549 | |
b7826503 | 2550 | CHECK_STRING (filename); |
199607e4 | 2551 | absname = Fexpand_file_name (filename, Qnil); |
32f4334d RS |
2552 | |
2553 | /* If the file name has special constructs in it, | |
2554 | call the corresponding file handler. */ | |
199607e4 | 2555 | handler = Ffind_file_name_handler (absname, Qfile_readable_p); |
32f4334d | 2556 | if (!NILP (handler)) |
199607e4 | 2557 | return call2 (handler, Qfile_readable_p, absname); |
32f4334d | 2558 | |
b1d1b865 | 2559 | absname = ENCODE_FILE (absname); |
73dcdb9f PE |
2560 | return (faccessat (AT_FDCWD, SSDATA (absname), R_OK, AT_EACCESS) == 0 |
2561 | ? Qt : Qnil); | |
570d7624 JB |
2562 | } |
2563 | ||
f793dc6c | 2564 | DEFUN ("file-writable-p", Ffile_writable_p, Sfile_writable_p, 1, 1, 0, |
8c1a1077 | 2565 | doc: /* Return t if file FILENAME can be written or created by you. */) |
5842a27b | 2566 | (Lisp_Object filename) |
f793dc6c | 2567 | { |
b1d1b865 | 2568 | Lisp_Object absname, dir, encoded; |
f793dc6c | 2569 | Lisp_Object handler; |
f793dc6c | 2570 | |
b7826503 | 2571 | CHECK_STRING (filename); |
199607e4 | 2572 | absname = Fexpand_file_name (filename, Qnil); |
f793dc6c RS |
2573 | |
2574 | /* If the file name has special constructs in it, | |
2575 | call the corresponding file handler. */ | |
199607e4 | 2576 | handler = Ffind_file_name_handler (absname, Qfile_writable_p); |
f793dc6c | 2577 | if (!NILP (handler)) |
199607e4 | 2578 | return call2 (handler, Qfile_writable_p, absname); |
f793dc6c | 2579 | |
b1d1b865 | 2580 | encoded = ENCODE_FILE (absname); |
73dcdb9f PE |
2581 | if (check_writable (SSDATA (encoded), W_OK)) |
2582 | return Qt; | |
2583 | if (errno != ENOENT) | |
2584 | return Qnil; | |
b1d1b865 | 2585 | |
199607e4 | 2586 | dir = Ffile_name_directory (absname); |
73dcdb9f | 2587 | eassert (!NILP (dir)); |
f793dc6c | 2588 | #ifdef MSDOS |
73dcdb9f | 2589 | dir = Fdirectory_file_name (dir); |
f793dc6c | 2590 | #endif /* MSDOS */ |
b1d1b865 RS |
2591 | |
2592 | dir = ENCODE_FILE (dir); | |
e3e8a75a GM |
2593 | #ifdef WINDOWSNT |
2594 | /* The read-only attribute of the parent directory doesn't affect | |
2595 | whether a file or directory can be created within it. Some day we | |
2596 | should check ACLs though, which do affect this. */ | |
73dcdb9f | 2597 | return file_directory_p (SDATA (dir)) ? Qt : Qnil; |
e3e8a75a | 2598 | #else |
73dcdb9f | 2599 | return check_writable (SSDATA (dir), W_OK | X_OK) ? Qt : Qnil; |
e3e8a75a | 2600 | #endif |
f793dc6c RS |
2601 | } |
2602 | \f | |
1f8653eb | 2603 | DEFUN ("access-file", Faccess_file, Saccess_file, 2, 2, 0, |
8c1a1077 PJ |
2604 | doc: /* Access file FILENAME, and get an error if that does not work. |
2605 | The second argument STRING is used in the error message. | |
a4e03fe5 | 2606 | If there is no error, returns nil. */) |
5842a27b | 2607 | (Lisp_Object filename, Lisp_Object string) |
1f8653eb | 2608 | { |
49475635 | 2609 | Lisp_Object handler, encoded_filename, absname; |
1f8653eb | 2610 | |
b7826503 | 2611 | CHECK_STRING (filename); |
49475635 EZ |
2612 | absname = Fexpand_file_name (filename, Qnil); |
2613 | ||
b7826503 | 2614 | CHECK_STRING (string); |
1f8653eb RS |
2615 | |
2616 | /* If the file name has special constructs in it, | |
2617 | call the corresponding file handler. */ | |
49475635 | 2618 | handler = Ffind_file_name_handler (absname, Qaccess_file); |
1f8653eb | 2619 | if (!NILP (handler)) |
49475635 | 2620 | return call3 (handler, Qaccess_file, absname, string); |
1f8653eb | 2621 | |
49475635 | 2622 | encoded_filename = ENCODE_FILE (absname); |
b1d1b865 | 2623 | |
a773ed9a | 2624 | if (faccessat (AT_FDCWD, SSDATA (encoded_filename), R_OK, AT_EACCESS) != 0) |
a9757f6a | 2625 | report_file_error (SSDATA (string), filename); |
1f8653eb RS |
2626 | |
2627 | return Qnil; | |
2628 | } | |
2629 | \f | |
8654f9d7 PE |
2630 | /* Relative to directory FD, return the symbolic link value of FILENAME. |
2631 | On failure, return nil. */ | |
2632 | Lisp_Object | |
2633 | emacs_readlinkat (int fd, char const *filename) | |
2634 | { | |
2635 | static struct allocator const emacs_norealloc_allocator = | |
2636 | { xmalloc, NULL, xfree, memory_full }; | |
2637 | Lisp_Object val; | |
2638 | char readlink_buf[1024]; | |
2639 | char *buf = careadlinkat (fd, filename, readlink_buf, sizeof readlink_buf, | |
2640 | &emacs_norealloc_allocator, readlinkat); | |
2641 | if (!buf) | |
2642 | return Qnil; | |
2643 | ||
eeccd06f | 2644 | val = build_unibyte_string (buf); |
8654f9d7 | 2645 | if (buf[0] == '/' && strchr (buf, ':')) |
eeccd06f | 2646 | val = concat2 (build_unibyte_string ("/:"), val); |
8654f9d7 PE |
2647 | if (buf != readlink_buf) |
2648 | xfree (buf); | |
2649 | val = DECODE_FILE (val); | |
2650 | return val; | |
2651 | } | |
2652 | ||
a7ca3326 | 2653 | DEFUN ("file-symlink-p", Ffile_symlink_p, Sfile_symlink_p, 1, 1, 0, |
8c1a1077 | 2654 | doc: /* Return non-nil if file FILENAME is the name of a symbolic link. |
1c353c74 | 2655 | The value is the link target, as a string. |
68780e2a RS |
2656 | Otherwise it returns nil. |
2657 | ||
2658 | This function returns t when given the name of a symlink that | |
2659 | points to a nonexistent file. */) | |
5842a27b | 2660 | (Lisp_Object filename) |
570d7624 | 2661 | { |
32f4334d | 2662 | Lisp_Object handler; |
570d7624 | 2663 | |
b7826503 | 2664 | CHECK_STRING (filename); |
570d7624 JB |
2665 | filename = Fexpand_file_name (filename, Qnil); |
2666 | ||
32f4334d RS |
2667 | /* If the file name has special constructs in it, |
2668 | call the corresponding file handler. */ | |
49307295 | 2669 | handler = Ffind_file_name_handler (filename, Qfile_symlink_p); |
32f4334d RS |
2670 | if (!NILP (handler)) |
2671 | return call2 (handler, Qfile_symlink_p, filename); | |
2672 | ||
b1d1b865 RS |
2673 | filename = ENCODE_FILE (filename); |
2674 | ||
8654f9d7 | 2675 | return emacs_readlinkat (AT_FDCWD, SSDATA (filename)); |
570d7624 JB |
2676 | } |
2677 | ||
a7ca3326 | 2678 | DEFUN ("file-directory-p", Ffile_directory_p, Sfile_directory_p, 1, 1, 0, |
8c1a1077 PJ |
2679 | doc: /* Return t if FILENAME names an existing directory. |
2680 | Symbolic links to directories count as directories. | |
2681 | See `file-symlink-p' to distinguish symlinks. */) | |
5842a27b | 2682 | (Lisp_Object filename) |
570d7624 | 2683 | { |
73dcdb9f | 2684 | Lisp_Object absname; |
32f4334d | 2685 | Lisp_Object handler; |
570d7624 | 2686 | |
4b4deea2 | 2687 | absname = expand_and_dir_to_file (filename, BVAR (current_buffer, directory)); |
570d7624 | 2688 | |
32f4334d RS |
2689 | /* If the file name has special constructs in it, |
2690 | call the corresponding file handler. */ | |
199607e4 | 2691 | handler = Ffind_file_name_handler (absname, Qfile_directory_p); |
32f4334d | 2692 | if (!NILP (handler)) |
199607e4 | 2693 | return call2 (handler, Qfile_directory_p, absname); |
32f4334d | 2694 | |
b1d1b865 RS |
2695 | absname = ENCODE_FILE (absname); |
2696 | ||
73dcdb9f PE |
2697 | return file_directory_p (SSDATA (absname)) ? Qt : Qnil; |
2698 | } | |
2699 | ||
2700 | /* Return true if FILE is a directory or a symlink to a directory. */ | |
2701 | bool | |
2702 | file_directory_p (char const *file) | |
2703 | { | |
2704 | #ifdef WINDOWSNT | |
2705 | /* This is cheaper than 'stat'. */ | |
2706 | return faccessat (AT_FDCWD, file, D_OK, AT_EACCESS) == 0; | |
2707 | #else | |
2708 | struct stat st; | |
2709 | return stat (file, &st) == 0 && S_ISDIR (st.st_mode); | |
2710 | #endif | |
570d7624 JB |
2711 | } |
2712 | ||
a7ca3326 | 2713 | DEFUN ("file-accessible-directory-p", Ffile_accessible_directory_p, |
16a97296 | 2714 | Sfile_accessible_directory_p, 1, 1, 0, |
e385ec41 RS |
2715 | doc: /* Return t if file FILENAME names a directory you can open. |
2716 | For the value to be t, FILENAME must specify the name of a directory as a file, | |
2717 | and the directory must allow you to open files in it. In order to use a | |
8c1a1077 PJ |
2718 | directory as a buffer's current directory, this predicate must return true. |
2719 | A directory name spec may be given instead; then the value is t | |
2720 | if the directory so specified exists and really is a readable and | |
2721 | searchable directory. */) | |
5842a27b | 2722 | (Lisp_Object filename) |
b72dea2a | 2723 | { |
73dcdb9f | 2724 | Lisp_Object absname; |
32f4334d | 2725 | Lisp_Object handler; |
73dcdb9f PE |
2726 | |
2727 | CHECK_STRING (filename); | |
2728 | absname = Fexpand_file_name (filename, Qnil); | |
32f4334d RS |
2729 | |
2730 | /* If the file name has special constructs in it, | |
2731 | call the corresponding file handler. */ | |
73dcdb9f | 2732 | handler = Ffind_file_name_handler (absname, Qfile_accessible_directory_p); |
32f4334d | 2733 | if (!NILP (handler)) |
a773ed9a PE |
2734 | { |
2735 | Lisp_Object r = call2 (handler, Qfile_accessible_directory_p, absname); | |
2736 | errno = 0; | |
2737 | return r; | |
2738 | } | |
32f4334d | 2739 | |
73dcdb9f PE |
2740 | absname = ENCODE_FILE (absname); |
2741 | return file_accessible_directory_p (SSDATA (absname)) ? Qt : Qnil; | |
2742 | } | |
2743 | ||
2744 | /* If FILE is a searchable directory or a symlink to a | |
2745 | searchable directory, return true. Otherwise return | |
2746 | false and set errno to an error number. */ | |
2747 | bool | |
2748 | file_accessible_directory_p (char const *file) | |
2749 | { | |
2750 | #ifdef DOS_NT | |
2751 | /* There's no need to test whether FILE is searchable, as the | |
2752 | searchable/executable bit is invented on DOS_NT platforms. */ | |
2753 | return file_directory_p (file); | |
2754 | #else | |
2755 | /* On POSIXish platforms, use just one system call; this avoids a | |
2756 | race and is typically faster. */ | |
2757 | ptrdiff_t len = strlen (file); | |
2758 | char const *dir; | |
2759 | bool ok; | |
2760 | int saved_errno; | |
2761 | USE_SAFE_ALLOCA; | |
2762 | ||
2763 | /* Normally a file "FOO" is an accessible directory if "FOO/." exists. | |
2764 | There are three exceptions: "", "/", and "//". Leave "" alone, | |
2765 | as it's invalid. Append only "." to the other two exceptions as | |
2766 | "/" and "//" are distinct on some platforms, whereas "/", "///", | |
2767 | "////", etc. are all equivalent. */ | |
2768 | if (! len) | |
2769 | dir = file; | |
2770 | else | |
2771 | { | |
2772 | /* Just check for trailing '/' when deciding whether to append '/'. | |
2773 | That's simpler than testing the two special cases "/" and "//", | |
2774 | and it's a safe optimization here. */ | |
2775 | char *buf = SAFE_ALLOCA (len + 3); | |
2776 | memcpy (buf, file, len); | |
31ff141c | 2777 | strcpy (buf + len, &"/."[file[len - 1] == '/']); |
73dcdb9f PE |
2778 | dir = buf; |
2779 | } | |
2780 | ||
2781 | ok = check_existing (dir); | |
2782 | saved_errno = errno; | |
2783 | SAFE_FREE (); | |
2784 | errno = saved_errno; | |
2785 | return ok; | |
2786 | #endif | |
b72dea2a JB |
2787 | } |
2788 | ||
f793dc6c | 2789 | DEFUN ("file-regular-p", Ffile_regular_p, Sfile_regular_p, 1, 1, 0, |
19a9c3b7 LH |
2790 | doc: /* Return t if FILENAME names a regular file. |
2791 | This is the sort of file that holds an ordinary stream of data bytes. | |
2792 | Symbolic links to regular files count as regular files. | |
2793 | See `file-symlink-p' to distinguish symlinks. */) | |
5842a27b | 2794 | (Lisp_Object filename) |
f793dc6c | 2795 | { |
199607e4 | 2796 | register Lisp_Object absname; |
f793dc6c RS |
2797 | struct stat st; |
2798 | Lisp_Object handler; | |
2799 | ||
4b4deea2 | 2800 | absname = expand_and_dir_to_file (filename, BVAR (current_buffer, directory)); |
f793dc6c RS |
2801 | |
2802 | /* If the file name has special constructs in it, | |
2803 | call the corresponding file handler. */ | |
199607e4 | 2804 | handler = Ffind_file_name_handler (absname, Qfile_regular_p); |
f793dc6c | 2805 | if (!NILP (handler)) |
199607e4 | 2806 | return call2 (handler, Qfile_regular_p, absname); |
f793dc6c | 2807 | |
b1d1b865 RS |
2808 | absname = ENCODE_FILE (absname); |
2809 | ||
c1c4693e RS |
2810 | #ifdef WINDOWSNT |
2811 | { | |
2812 | int result; | |
2813 | Lisp_Object tem = Vw32_get_true_file_attributes; | |
2814 | ||
2815 | /* Tell stat to use expensive method to get accurate info. */ | |
2816 | Vw32_get_true_file_attributes = Qt; | |
d5db4077 | 2817 | result = stat (SDATA (absname), &st); |
c1c4693e RS |
2818 | Vw32_get_true_file_attributes = tem; |
2819 | ||
2820 | if (result < 0) | |
2821 | return Qnil; | |
f68c809d | 2822 | return S_ISREG (st.st_mode) ? Qt : Qnil; |
c1c4693e RS |
2823 | } |
2824 | #else | |
42a5b22f | 2825 | if (stat (SSDATA (absname), &st) < 0) |
f793dc6c | 2826 | return Qnil; |
f68c809d | 2827 | return S_ISREG (st.st_mode) ? Qt : Qnil; |
c1c4693e | 2828 | #endif |
f793dc6c RS |
2829 | } |
2830 | \f | |
574c05e2 KK |
2831 | DEFUN ("file-selinux-context", Ffile_selinux_context, |
2832 | Sfile_selinux_context, 1, 1, 0, | |
fa74b241 CY |
2833 | doc: /* Return SELinux context of file named FILENAME. |
2834 | The return value is a list (USER ROLE TYPE RANGE), where the list | |
2835 | elements are strings naming the user, role, type, and range of the | |
2836 | file's SELinux security context. | |
2837 | ||
2838 | Return (nil nil nil nil) if the file is nonexistent or inaccessible, | |
2839 | or if SELinux is disabled, or if Emacs lacks SELinux support. */) | |
5842a27b | 2840 | (Lisp_Object filename) |
574c05e2 KK |
2841 | { |
2842 | Lisp_Object absname; | |
2843 | Lisp_Object values[4]; | |
2844 | Lisp_Object handler; | |
2845 | #if HAVE_LIBSELINUX | |
2846 | security_context_t con; | |
2847 | int conlength; | |
2848 | context_t context; | |
2849 | #endif | |
2850 | ||
4b4deea2 | 2851 | absname = expand_and_dir_to_file (filename, BVAR (current_buffer, directory)); |
574c05e2 KK |
2852 | |
2853 | /* If the file name has special constructs in it, | |
2854 | call the corresponding file handler. */ | |
2855 | handler = Ffind_file_name_handler (absname, Qfile_selinux_context); | |
2856 | if (!NILP (handler)) | |
2857 | return call2 (handler, Qfile_selinux_context, absname); | |
2858 | ||
2859 | absname = ENCODE_FILE (absname); | |
2860 | ||
2861 | values[0] = Qnil; | |
2862 | values[1] = Qnil; | |
2863 | values[2] = Qnil; | |
2864 | values[3] = Qnil; | |
2865 | #if HAVE_LIBSELINUX | |
2866 | if (is_selinux_enabled ()) | |
2867 | { | |
b14aac08 | 2868 | conlength = lgetfilecon (SSDATA (absname), &con); |
574c05e2 KK |
2869 | if (conlength > 0) |
2870 | { | |
2871 | context = context_new (con); | |
45841e65 KK |
2872 | if (context_user_get (context)) |
2873 | values[0] = build_string (context_user_get (context)); | |
2874 | if (context_role_get (context)) | |
2875 | values[1] = build_string (context_role_get (context)); | |
2876 | if (context_type_get (context)) | |
2877 | values[2] = build_string (context_type_get (context)); | |
2878 | if (context_range_get (context)) | |
2879 | values[3] = build_string (context_range_get (context)); | |
574c05e2 | 2880 | context_free (context); |
c6ba4138 | 2881 | freecon (con); |
574c05e2 | 2882 | } |
574c05e2 KK |
2883 | } |
2884 | #endif | |
2885 | ||
5e617bc2 | 2886 | return Flist (sizeof (values) / sizeof (values[0]), values); |
574c05e2 KK |
2887 | } |
2888 | \f | |
2889 | DEFUN ("set-file-selinux-context", Fset_file_selinux_context, | |
2890 | Sset_file_selinux_context, 2, 2, 0, | |
fa74b241 CY |
2891 | doc: /* Set SELinux context of file named FILENAME to CONTEXT. |
2892 | CONTEXT should be a list (USER ROLE TYPE RANGE), where the list | |
2893 | elements are strings naming the components of a SELinux context. | |
2894 | ||
ccad023b EZ |
2895 | Value is t if setting of SELinux context was successful, nil otherwise. |
2896 | ||
2897 | This function does nothing and returns nil if SELinux is disabled, | |
2898 | or if Emacs was not compiled with SELinux support. */) | |
5842a27b | 2899 | (Lisp_Object filename, Lisp_Object context) |
574c05e2 | 2900 | { |
0f4a96b5 | 2901 | Lisp_Object absname; |
574c05e2 | 2902 | Lisp_Object handler; |
0f4a96b5 JB |
2903 | #if HAVE_LIBSELINUX |
2904 | Lisp_Object encoded_absname; | |
574c05e2 KK |
2905 | Lisp_Object user = CAR_SAFE (context); |
2906 | Lisp_Object role = CAR_SAFE (CDR_SAFE (context)); | |
2907 | Lisp_Object type = CAR_SAFE (CDR_SAFE (CDR_SAFE (context))); | |
2908 | Lisp_Object range = CAR_SAFE (CDR_SAFE (CDR_SAFE (CDR_SAFE (context)))); | |
574c05e2 | 2909 | security_context_t con; |
f75d7a91 PE |
2910 | bool fail; |
2911 | int conlength; | |
574c05e2 KK |
2912 | context_t parsed_con; |
2913 | #endif | |
2914 | ||
4b4deea2 | 2915 | absname = Fexpand_file_name (filename, BVAR (current_buffer, directory)); |
574c05e2 KK |
2916 | |
2917 | /* If the file name has special constructs in it, | |
2918 | call the corresponding file handler. */ | |
2919 | handler = Ffind_file_name_handler (absname, Qset_file_selinux_context); | |
2920 | if (!NILP (handler)) | |
2921 | return call3 (handler, Qset_file_selinux_context, absname, context); | |
2922 | ||
0f4a96b5 | 2923 | #if HAVE_LIBSELINUX |
574c05e2 KK |
2924 | if (is_selinux_enabled ()) |
2925 | { | |
2926 | /* Get current file context. */ | |
a9b53ad3 | 2927 | encoded_absname = ENCODE_FILE (absname); |
b14aac08 | 2928 | conlength = lgetfilecon (SSDATA (encoded_absname), &con); |
574c05e2 KK |
2929 | if (conlength > 0) |
2930 | { | |
2931 | parsed_con = context_new (con); | |
2932 | /* Change the parts defined in the parameter.*/ | |
2933 | if (STRINGP (user)) | |
2934 | { | |
b14aac08 | 2935 | if (context_user_set (parsed_con, SSDATA (user))) |
574c05e2 KK |
2936 | error ("Doing context_user_set"); |
2937 | } | |
2938 | if (STRINGP (role)) | |
2939 | { | |
b14aac08 | 2940 | if (context_role_set (parsed_con, SSDATA (role))) |
574c05e2 KK |
2941 | error ("Doing context_role_set"); |
2942 | } | |
2943 | if (STRINGP (type)) | |
2944 | { | |
b14aac08 | 2945 | if (context_type_set (parsed_con, SSDATA (type))) |
574c05e2 KK |
2946 | error ("Doing context_type_set"); |
2947 | } | |
2948 | if (STRINGP (range)) | |
2949 | { | |
b14aac08 | 2950 | if (context_range_set (parsed_con, SSDATA (range))) |
574c05e2 KK |
2951 | error ("Doing context_range_set"); |
2952 | } | |
2953 | ||
24c51a09 | 2954 | /* Set the modified context back to the file. */ |
f75d7a91 PE |
2955 | fail = (lsetfilecon (SSDATA (encoded_absname), |
2956 | context_str (parsed_con)) | |
2957 | != 0); | |
24c51a09 GM |
2958 | /* See http://debbugs.gnu.org/11245 for ENOTSUP. */ |
2959 | if (fail && errno != ENOTSUP) | |
a9757f6a | 2960 | report_file_error ("Doing lsetfilecon", absname); |
574c05e2 KK |
2961 | |
2962 | context_free (parsed_con); | |
c6ba4138 | 2963 | freecon (con); |
c1fea2c0 | 2964 | return fail ? Qnil : Qt; |
574c05e2 KK |
2965 | } |
2966 | else | |
a9757f6a | 2967 | report_file_error ("Doing lgetfilecon", absname); |
574c05e2 KK |
2968 | } |
2969 | #endif | |
2970 | ||
2971 | return Qnil; | |
2972 | } | |
2973 | \f | |
7c3d167f | 2974 | DEFUN ("file-acl", Ffile_acl, Sfile_acl, 1, 1, 0, |
553081a5 SM |
2975 | doc: /* Return ACL entries of file named FILENAME. |
2976 | The entries are returned in a format suitable for use in `set-file-acl' | |
2977 | but is otherwise undocumented and subject to change. | |
7c3d167f | 2978 | Return nil if file does not exist or is not accessible, or if Emacs |
553081a5 | 2979 | was unable to determine the ACL entries. */) |
7c3d167f RF |
2980 | (Lisp_Object filename) |
2981 | { | |
2982 | Lisp_Object absname; | |
2983 | Lisp_Object handler; | |
ffdc270a | 2984 | #ifdef HAVE_ACL_SET_FILE |
7c3d167f RF |
2985 | acl_t acl; |
2986 | Lisp_Object acl_string; | |
2987 | char *str; | |
2988 | #endif | |
2989 | ||
2990 | absname = expand_and_dir_to_file (filename, | |
2991 | BVAR (current_buffer, directory)); | |
2992 | ||
2993 | /* If the file name has special constructs in it, | |
2994 | call the corresponding file handler. */ | |
2995 | handler = Ffind_file_name_handler (absname, Qfile_acl); | |
2996 | if (!NILP (handler)) | |
2997 | return call2 (handler, Qfile_acl, absname); | |
2998 | ||
ffdc270a | 2999 | #ifdef HAVE_ACL_SET_FILE |
7c3d167f RF |
3000 | absname = ENCODE_FILE (absname); |
3001 | ||
3002 | acl = acl_get_file (SSDATA (absname), ACL_TYPE_ACCESS); | |
3003 | if (acl == NULL) | |
3004 | return Qnil; | |
3005 | ||
3006 | str = acl_to_text (acl, NULL); | |
3007 | if (str == NULL) | |
3008 | { | |
3009 | acl_free (acl); | |
3010 | return Qnil; | |
3011 | } | |
3012 | ||
3013 | acl_string = build_string (str); | |
3014 | acl_free (str); | |
3015 | acl_free (acl); | |
3016 | ||
3017 | return acl_string; | |
3018 | #endif | |
3019 | ||
3020 | return Qnil; | |
3021 | } | |
3022 | ||
3023 | DEFUN ("set-file-acl", Fset_file_acl, Sset_file_acl, | |
3024 | 2, 2, 0, | |
3025 | doc: /* Set ACL of file named FILENAME to ACL-STRING. | |
3026 | ACL-STRING should contain the textual representation of the ACL | |
3027 | entries in a format suitable for the platform. | |
3028 | ||
ccad023b EZ |
3029 | Value is t if setting of ACL was successful, nil otherwise. |
3030 | ||
7c3d167f RF |
3031 | Setting ACL for local files requires Emacs to be built with ACL |
3032 | support. */) | |
3033 | (Lisp_Object filename, Lisp_Object acl_string) | |
3034 | { | |
3035 | Lisp_Object absname; | |
3036 | Lisp_Object handler; | |
ffdc270a | 3037 | #ifdef HAVE_ACL_SET_FILE |
7c3d167f RF |
3038 | Lisp_Object encoded_absname; |
3039 | acl_t acl; | |
3040 | bool fail; | |
3041 | #endif | |
3042 | ||
3043 | absname = Fexpand_file_name (filename, BVAR (current_buffer, directory)); | |
3044 | ||
3045 | /* If the file name has special constructs in it, | |
3046 | call the corresponding file handler. */ | |
3047 | handler = Ffind_file_name_handler (absname, Qset_file_acl); | |
3048 | if (!NILP (handler)) | |
3049 | return call3 (handler, Qset_file_acl, absname, acl_string); | |
3050 | ||
ffdc270a | 3051 | #ifdef HAVE_ACL_SET_FILE |
7c3d167f RF |
3052 | if (STRINGP (acl_string)) |
3053 | { | |
3054 | acl = acl_from_text (SSDATA (acl_string)); | |
3055 | if (acl == NULL) | |
3056 | { | |
a9757f6a | 3057 | report_file_error ("Converting ACL", absname); |
7c3d167f RF |
3058 | return Qnil; |
3059 | } | |
3060 | ||
3061 | encoded_absname = ENCODE_FILE (absname); | |
3062 | ||
3063 | fail = (acl_set_file (SSDATA (encoded_absname), ACL_TYPE_ACCESS, | |
3064 | acl) | |
3065 | != 0); | |
ffdc270a | 3066 | if (fail && acl_errno_valid (errno)) |
a9757f6a | 3067 | report_file_error ("Setting ACL", absname); |
7c3d167f RF |
3068 | |
3069 | acl_free (acl); | |
c1fea2c0 | 3070 | return fail ? Qnil : Qt; |
7c3d167f RF |
3071 | } |
3072 | #endif | |
3073 | ||
3074 | return Qnil; | |
3075 | } | |
3076 | \f | |
570d7624 | 3077 | DEFUN ("file-modes", Ffile_modes, Sfile_modes, 1, 1, 0, |
d4a42098 KS |
3078 | doc: /* Return mode bits of file named FILENAME, as an integer. |
3079 | Return nil, if file does not exist or is not accessible. */) | |
5842a27b | 3080 | (Lisp_Object filename) |
570d7624 | 3081 | { |
199607e4 | 3082 | Lisp_Object absname; |
570d7624 | 3083 | struct stat st; |
32f4334d | 3084 | Lisp_Object handler; |
570d7624 | 3085 | |
4b4deea2 | 3086 | absname = expand_and_dir_to_file (filename, BVAR (current_buffer, directory)); |
570d7624 | 3087 | |
32f4334d RS |
3088 | /* If the file name has special constructs in it, |
3089 | call the corresponding file handler. */ | |
199607e4 | 3090 | handler = Ffind_file_name_handler (absname, Qfile_modes); |
32f4334d | 3091 | if (!NILP (handler)) |
199607e4 | 3092 | return call2 (handler, Qfile_modes, absname); |
32f4334d | 3093 | |
b1d1b865 RS |
3094 | absname = ENCODE_FILE (absname); |
3095 | ||
42a5b22f | 3096 | if (stat (SSDATA (absname), &st) < 0) |
570d7624 | 3097 | return Qnil; |
3ace87e3 | 3098 | |
570d7624 JB |
3099 | return make_number (st.st_mode & 07777); |
3100 | } | |
3101 | ||
09fbdf6c MC |
3102 | DEFUN ("set-file-modes", Fset_file_modes, Sset_file_modes, 2, 2, |
3103 | "(let ((file (read-file-name \"File: \"))) \ | |
3104 | (list file (read-file-modes nil file)))", | |
8c1a1077 | 3105 | doc: /* Set mode bits of file named FILENAME to MODE (an integer). |
ea429250 EZ |
3106 | Only the 12 low bits of MODE are used. |
3107 | ||
3108 | Interactively, mode bits are read by `read-file-modes', which accepts | |
712adc82 | 3109 | symbolic notation, like the `chmod' command from GNU Coreutils. */) |
5842a27b | 3110 | (Lisp_Object filename, Lisp_Object mode) |
570d7624 | 3111 | { |
b1d1b865 | 3112 | Lisp_Object absname, encoded_absname; |
32f4334d | 3113 | Lisp_Object handler; |
570d7624 | 3114 | |
4b4deea2 | 3115 | absname = Fexpand_file_name (filename, BVAR (current_buffer, directory)); |
b7826503 | 3116 | CHECK_NUMBER (mode); |
570d7624 | 3117 | |
32f4334d RS |
3118 | /* If the file name has special constructs in it, |
3119 | call the corresponding file handler. */ | |
199607e4 | 3120 | handler = Ffind_file_name_handler (absname, Qset_file_modes); |
32f4334d | 3121 | if (!NILP (handler)) |
199607e4 | 3122 | return call3 (handler, Qset_file_modes, absname, mode); |
32f4334d | 3123 | |
b1d1b865 RS |
3124 | encoded_absname = ENCODE_FILE (absname); |
3125 | ||
18c52557 | 3126 | if (chmod (SSDATA (encoded_absname), XINT (mode) & 07777) < 0) |
a9757f6a | 3127 | report_file_error ("Doing chmod", absname); |
570d7624 JB |
3128 | |
3129 | return Qnil; | |
3130 | } | |
3131 | ||
c24e9a53 | 3132 | DEFUN ("set-default-file-modes", Fset_default_file_modes, Sset_default_file_modes, 1, 1, 0, |
8c1a1077 PJ |
3133 | doc: /* Set the file permission bits for newly created files. |
3134 | The argument MODE should be an integer; only the low 9 bits are used. | |
3135 | This setting is inherited by subprocesses. */) | |
5842a27b | 3136 | (Lisp_Object mode) |
36a8c287 | 3137 | { |
b7826503 | 3138 | CHECK_NUMBER (mode); |
199607e4 | 3139 | |
5f85ea58 | 3140 | umask ((~ XINT (mode)) & 0777); |
36a8c287 JB |
3141 | |
3142 | return Qnil; | |
3143 | } | |
3144 | ||
c24e9a53 | 3145 | DEFUN ("default-file-modes", Fdefault_file_modes, Sdefault_file_modes, 0, 0, 0, |
8c1a1077 PJ |
3146 | doc: /* Return the default file protection for created files. |
3147 | The value is an integer. */) | |
5842a27b | 3148 | (void) |
36a8c287 | 3149 | { |
f75d7a91 | 3150 | mode_t realmask; |
5f85ea58 | 3151 | Lisp_Object value; |
36a8c287 | 3152 | |
4d7e6e51 | 3153 | block_input (); |
5f85ea58 RS |
3154 | realmask = umask (0); |
3155 | umask (realmask); | |
4d7e6e51 | 3156 | unblock_input (); |
36a8c287 | 3157 | |
46283abe | 3158 | XSETINT (value, (~ realmask) & 0777); |
5f85ea58 | 3159 | return value; |
36a8c287 | 3160 | } |
819da85b | 3161 | \f |
819da85b EZ |
3162 | |
3163 | DEFUN ("set-file-times", Fset_file_times, Sset_file_times, 1, 2, 0, | |
f839df0c | 3164 | doc: /* Set times of file FILENAME to TIMESTAMP. |
819da85b EZ |
3165 | Set both access and modification times. |
3166 | Return t on success, else nil. | |
f839df0c | 3167 | Use the current time if TIMESTAMP is nil. TIMESTAMP is in the format of |
819da85b | 3168 | `current-time'. */) |
f839df0c | 3169 | (Lisp_Object filename, Lisp_Object timestamp) |
819da85b EZ |
3170 | { |
3171 | Lisp_Object absname, encoded_absname; | |
3172 | Lisp_Object handler; | |
43aac990 | 3173 | struct timespec t = lisp_time_argument (timestamp); |
819da85b | 3174 | |
4b4deea2 | 3175 | absname = Fexpand_file_name (filename, BVAR (current_buffer, directory)); |
819da85b EZ |
3176 | |
3177 | /* If the file name has special constructs in it, | |
3178 | call the corresponding file handler. */ | |
3179 | handler = Ffind_file_name_handler (absname, Qset_file_times); | |
3180 | if (!NILP (handler)) | |
f839df0c | 3181 | return call3 (handler, Qset_file_times, absname, timestamp); |
819da85b EZ |
3182 | |
3183 | encoded_absname = ENCODE_FILE (absname); | |
5df5e07c | 3184 | |
819da85b | 3185 | { |
96c06863 | 3186 | if (set_file_times (-1, SSDATA (encoded_absname), t, t) != 0) |
819da85b | 3187 | { |
0d9f584b | 3188 | #ifdef MSDOS |
819da85b | 3189 | /* Setting times on a directory always fails. */ |
73dcdb9f | 3190 | if (file_directory_p (SSDATA (encoded_absname))) |
819da85b EZ |
3191 | return Qnil; |
3192 | #endif | |
a9757f6a | 3193 | report_file_error ("Setting file times", absname); |
819da85b EZ |
3194 | } |
3195 | } | |
5df5e07c | 3196 | |
819da85b EZ |
3197 | return Qt; |
3198 | } | |
f793dc6c | 3199 | \f |
697c17a2 | 3200 | #ifdef HAVE_SYNC |
85ffea93 | 3201 | DEFUN ("unix-sync", Funix_sync, Sunix_sync, 0, 0, "", |
8c1a1077 | 3202 | doc: /* Tell Unix to finish all pending disk updates. */) |
5842a27b | 3203 | (void) |
85ffea93 RS |
3204 | { |
3205 | sync (); | |
3206 | return Qnil; | |
3207 | } | |
3208 | ||
697c17a2 | 3209 | #endif /* HAVE_SYNC */ |
85ffea93 | 3210 | |
570d7624 | 3211 | DEFUN ("file-newer-than-file-p", Ffile_newer_than_file_p, Sfile_newer_than_file_p, 2, 2, 0, |
8c1a1077 PJ |
3212 | doc: /* Return t if file FILE1 is newer than file FILE2. |
3213 | If FILE1 does not exist, the answer is nil; | |
3214 | otherwise, if FILE2 does not exist, the answer is t. */) | |
5842a27b | 3215 | (Lisp_Object file1, Lisp_Object file2) |
570d7624 | 3216 | { |
199607e4 | 3217 | Lisp_Object absname1, absname2; |
39adff0d | 3218 | struct stat st1, st2; |
32f4334d | 3219 | Lisp_Object handler; |
09121adc | 3220 | struct gcpro gcpro1, gcpro2; |
570d7624 | 3221 | |
b7826503 PJ |
3222 | CHECK_STRING (file1); |
3223 | CHECK_STRING (file2); | |
570d7624 | 3224 | |
199607e4 RS |
3225 | absname1 = Qnil; |
3226 | GCPRO2 (absname1, file2); | |
4b4deea2 TT |
3227 | absname1 = expand_and_dir_to_file (file1, BVAR (current_buffer, directory)); |
3228 | absname2 = expand_and_dir_to_file (file2, BVAR (current_buffer, directory)); | |
09121adc | 3229 | UNGCPRO; |
570d7624 | 3230 | |
32f4334d RS |
3231 | /* If the file name has special constructs in it, |
3232 | call the corresponding file handler. */ | |
199607e4 | 3233 | handler = Ffind_file_name_handler (absname1, Qfile_newer_than_file_p); |
51cf6d37 | 3234 | if (NILP (handler)) |
199607e4 | 3235 | handler = Ffind_file_name_handler (absname2, Qfile_newer_than_file_p); |
32f4334d | 3236 | if (!NILP (handler)) |
199607e4 | 3237 | return call3 (handler, Qfile_newer_than_file_p, absname1, absname2); |
32f4334d | 3238 | |
b1d1b865 RS |
3239 | GCPRO2 (absname1, absname2); |
3240 | absname1 = ENCODE_FILE (absname1); | |
3241 | absname2 = ENCODE_FILE (absname2); | |
3242 | UNGCPRO; | |
3243 | ||
39adff0d | 3244 | if (stat (SSDATA (absname1), &st1) < 0) |
570d7624 JB |
3245 | return Qnil; |
3246 | ||
39adff0d | 3247 | if (stat (SSDATA (absname2), &st2) < 0) |
570d7624 JB |
3248 | return Qt; |
3249 | ||
43aac990 | 3250 | return (timespec_cmp (get_stat_mtime (&st2), get_stat_mtime (&st1)) < 0 |
39adff0d | 3251 | ? Qt : Qnil); |
570d7624 JB |
3252 | } |
3253 | \f | |
6fdaa9a0 KH |
3254 | #ifndef READ_BUF_SIZE |
3255 | #define READ_BUF_SIZE (64 << 10) | |
3256 | #endif | |
d311d28c PE |
3257 | /* Some buffer offsets are stored in 'int' variables. */ |
3258 | verify (READ_BUF_SIZE <= INT_MAX); | |
6fdaa9a0 | 3259 | |
98a7d268 KH |
3260 | /* This function is called after Lisp functions to decide a coding |
3261 | system are called, or when they cause an error. Before they are | |
3262 | called, the current buffer is set unibyte and it contains only a | |
3263 | newly inserted text (thus the buffer was empty before the | |
3264 | insertion). | |
3265 | ||
3266 | The functions may set markers, overlays, text properties, or even | |
3267 | alter the buffer contents, change the current buffer. | |
3268 | ||
3269 | Here, we reset all those changes by: | |
3270 | o set back the current buffer. | |
3271 | o move all markers and overlays to BEG. | |
3272 | o remove all text properties. | |
3273 | o set back the buffer multibyteness. */ | |
f736ffbf | 3274 | |
27e498e6 | 3275 | static void |
971de7fb | 3276 | decide_coding_unwind (Lisp_Object unwind_data) |
f736ffbf | 3277 | { |
98a7d268 | 3278 | Lisp_Object multibyte, undo_list, buffer; |
f736ffbf | 3279 | |
98a7d268 KH |
3280 | multibyte = XCAR (unwind_data); |
3281 | unwind_data = XCDR (unwind_data); | |
3282 | undo_list = XCAR (unwind_data); | |
3283 | buffer = XCDR (unwind_data); | |
3284 | ||
a3d794a1 | 3285 | set_buffer_internal (XBUFFER (buffer)); |
98a7d268 KH |
3286 | adjust_markers_for_delete (BEG, BEG_BYTE, Z, Z_BYTE); |
3287 | adjust_overlays_for_delete (BEG, Z - BEG); | |
0c94c8d6 | 3288 | set_buffer_intervals (current_buffer, NULL); |
98a7d268 KH |
3289 | TEMP_SET_PT_BOTH (BEG, BEG_BYTE); |
3290 | ||
3291 | /* Now we are safe to change the buffer's multibyteness directly. */ | |
39eb03f1 PE |
3292 | bset_enable_multibyte_characters (current_buffer, multibyte); |
3293 | bset_undo_list (current_buffer, undo_list); | |
f736ffbf KH |
3294 | } |
3295 | ||
2ef88fd4 | 3296 | /* Read from a non-regular file. STATE is a Lisp_Save_Value |
3346c1d0 DA |
3297 | object where slot 0 is the file descriptor, slot 1 specifies |
3298 | an offset to put the read bytes, and slot 2 is the maximum | |
3299 | amount of bytes to read. Value is the number of bytes read. */ | |
55587f8a GM |
3300 | |
3301 | static Lisp_Object | |
2ef88fd4 | 3302 | read_non_regular (Lisp_Object state) |
55587f8a | 3303 | { |
d311d28c | 3304 | int nbytes; |
efdc16c9 | 3305 | |
1b978129 GM |
3306 | immediate_quit = 1; |
3307 | QUIT; | |
3346c1d0 | 3308 | nbytes = emacs_read (XSAVE_INTEGER (state, 0), |
5976c3fe | 3309 | ((char *) BEG_ADDR + PT_BYTE - BEG_BYTE |
3346c1d0 DA |
3310 | + XSAVE_INTEGER (state, 1)), |
3311 | XSAVE_INTEGER (state, 2)); | |
1b978129 | 3312 | immediate_quit = 0; |
e07469fa DA |
3313 | /* Fast recycle this object for the likely next call. */ |
3314 | free_misc (state); | |
1b978129 GM |
3315 | return make_number (nbytes); |
3316 | } | |
55587f8a | 3317 | |
2ef88fd4 DA |
3318 | |
3319 | /* Condition-case handler used when reading from non-regular files | |
3320 | in insert-file-contents. */ | |
1b978129 GM |
3321 | |
3322 | static Lisp_Object | |
2ef88fd4 | 3323 | read_non_regular_quit (Lisp_Object ignore) |
1b978129 | 3324 | { |
55587f8a GM |
3325 | return Qnil; |
3326 | } | |
3327 | ||
b3fbb395 PE |
3328 | /* Return the file offset that VAL represents, checking for type |
3329 | errors and overflow. */ | |
e69dafad | 3330 | static off_t |
b3fbb395 | 3331 | file_offset (Lisp_Object val) |
e69dafad | 3332 | { |
b3fbb395 PE |
3333 | if (RANGED_INTEGERP (0, val, TYPE_MAXIMUM (off_t))) |
3334 | return XINT (val); | |
3335 | ||
3336 | if (FLOATP (val)) | |
e69dafad | 3337 | { |
b3fbb395 | 3338 | double v = XFLOAT_DATA (val); |
7216e43b | 3339 | if (0 <= v |
b3fbb395 PE |
3340 | && (sizeof (off_t) < sizeof v |
3341 | ? v <= TYPE_MAXIMUM (off_t) | |
3342 | : v < TYPE_MAXIMUM (off_t))) | |
3343 | return v; | |
e69dafad | 3344 | } |
b3fbb395 PE |
3345 | |
3346 | wrong_type_argument (intern ("file-offset"), val); | |
e69dafad PE |
3347 | } |
3348 | ||
f0941253 | 3349 | /* Return a special time value indicating the error number ERRNUM. */ |
43aac990 | 3350 | static struct timespec |
f0941253 | 3351 | time_error_value (int errnum) |
dbeed9a6 | 3352 | { |
0497dc44 | 3353 | int ns = (errnum == ENOENT || errnum == EACCES || errnum == ENOTDIR |
dbeed9a6 PE |
3354 | ? NONEXISTENT_MODTIME_NSECS |
3355 | : UNKNOWN_MODTIME_NSECS); | |
43aac990 | 3356 | return make_timespec (0, ns); |
dbeed9a6 | 3357 | } |
55587f8a | 3358 | |
570d7624 | 3359 | DEFUN ("insert-file-contents", Finsert_file_contents, Sinsert_file_contents, |
8c1a1077 PJ |
3360 | 1, 5, 0, |
3361 | doc: /* Insert contents of file FILENAME after point. | |
cf6d2357 | 3362 | Returns list of absolute file name and number of characters inserted. |
6f2528d8 MR |
3363 | If second argument VISIT is non-nil, the buffer's visited filename and |
3364 | last save file modtime are set, and it is marked unmodified. If | |
3365 | visiting and the file does not exist, visiting is completed before the | |
3366 | error is signaled. | |
3367 | ||
3368 | The optional third and fourth arguments BEG and END specify what portion | |
3369 | of the file to insert. These arguments count bytes in the file, not | |
3370 | characters in the buffer. If VISIT is non-nil, BEG and END must be nil. | |
3371 | ||
3372 | If optional fifth argument REPLACE is non-nil, replace the current | |
3373 | buffer contents (in the accessible portion) with the file contents. | |
3374 | This is better than simply deleting and inserting the whole thing | |
3375 | because (1) it preserves some marker positions and (2) it puts less data | |
3376 | in the undo list. When REPLACE is non-nil, the second return value is | |
3377 | the number of characters that replace previous buffer contents. | |
3378 | ||
3379 | This function does code conversion according to the value of | |
3380 | `coding-system-for-read' or `file-coding-system-alist', and sets the | |
bb085aed EZ |
3381 | variable `last-coding-system-used' to the coding system actually used. |
3382 | ||
3383 | In addition, this function decodes the inserted text from known formats | |
3384 | by calling `format-decode', which see. */) | |
5842a27b | 3385 | (Lisp_Object filename, Lisp_Object visit, Lisp_Object beg, Lisp_Object end, Lisp_Object replace) |
570d7624 JB |
3386 | { |
3387 | struct stat st; | |
43aac990 | 3388 | struct timespec mtime; |
f75d7a91 | 3389 | int fd; |
d311d28c | 3390 | ptrdiff_t inserted = 0; |
f75d7a91 | 3391 | ptrdiff_t how_much; |
728f8f0a | 3392 | off_t beg_offset, end_offset; |
f75d7a91 | 3393 | int unprocessed; |
d311d28c | 3394 | ptrdiff_t count = SPECPDL_INDEX (); |
6f2528d8 MR |
3395 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4, gcpro5; |
3396 | Lisp_Object handler, val, insval, orig_filename, old_undo; | |
d6a3cc15 | 3397 | Lisp_Object p; |
d311d28c | 3398 | ptrdiff_t total = 0; |
f75d7a91 | 3399 | bool not_regular = 0; |
2ef88fd4 | 3400 | int save_errno = 0; |
5976c3fe | 3401 | char read_buf[READ_BUF_SIZE]; |
6fdaa9a0 | 3402 | struct coding_system coding; |
f75d7a91 PE |
3403 | bool replace_handled = 0; |
3404 | bool set_coding_system = 0; | |
db327c7e | 3405 | Lisp_Object coding_system; |
f75d7a91 | 3406 | bool read_quit = 0; |
22513e52 SM |
3407 | /* If the undo log only contains the insertion, there's no point |
3408 | keeping it. It's typically when we first fill a file-buffer. */ | |
3409 | bool empty_undo_list_p | |
3410 | = (!NILP (visit) && NILP (BVAR (current_buffer, undo_list)) | |
3411 | && BEG == Z); | |
490ee853 | 3412 | Lisp_Object old_Vdeactivate_mark = Vdeactivate_mark; |
f75d7a91 | 3413 | bool we_locked_file = 0; |
41d48a42 | 3414 | ptrdiff_t fd_index; |
32f4334d | 3415 | |
95385625 RS |
3416 | if (current_buffer->base_buffer && ! NILP (visit)) |
3417 | error ("Cannot do file visiting in an indirect buffer"); | |
3418 | ||
4b4deea2 | 3419 | if (!NILP (BVAR (current_buffer, read_only))) |
95385625 RS |
3420 | Fbarf_if_buffer_read_only (); |
3421 | ||
32f4334d | 3422 | val = Qnil; |
d6a3cc15 | 3423 | p = Qnil; |
b1d1b865 | 3424 | orig_filename = Qnil; |
6f2528d8 | 3425 | old_undo = Qnil; |
32f4334d | 3426 | |
6f2528d8 | 3427 | GCPRO5 (filename, val, p, orig_filename, old_undo); |
570d7624 | 3428 | |
b7826503 | 3429 | CHECK_STRING (filename); |
570d7624 JB |
3430 | filename = Fexpand_file_name (filename, Qnil); |
3431 | ||
1c157f8d KH |
3432 | /* The value Qnil means that the coding system is not yet |
3433 | decided. */ | |
3434 | coding_system = Qnil; | |
3435 | ||
32f4334d RS |
3436 | /* If the file name has special constructs in it, |
3437 | call the corresponding file handler. */ | |
49307295 | 3438 | handler = Ffind_file_name_handler (filename, Qinsert_file_contents); |
32f4334d RS |
3439 | if (!NILP (handler)) |
3440 | { | |
3d0387c0 RS |
3441 | val = call6 (handler, Qinsert_file_contents, filename, |
3442 | visit, beg, end, replace); | |
d311d28c PE |
3443 | if (CONSP (val) && CONSP (XCDR (val)) |
3444 | && RANGED_INTEGERP (0, XCAR (XCDR (val)), ZV - PT)) | |
03699b14 | 3445 | inserted = XINT (XCAR (XCDR (val))); |
32f4334d RS |
3446 | goto handled; |
3447 | } | |
3448 | ||
b1d1b865 RS |
3449 | orig_filename = filename; |
3450 | filename = ENCODE_FILE (filename); | |
3451 | ||
67722112 PE |
3452 | fd = emacs_open (SSDATA (filename), O_RDONLY, 0); |
3453 | if (fd < 0) | |
570d7624 | 3454 | { |
e5e9d610 | 3455 | save_errno = errno; |
265a9e55 | 3456 | if (NILP (visit)) |
a9757f6a | 3457 | report_file_error ("Opening input file", orig_filename); |
f0941253 | 3458 | mtime = time_error_value (save_errno); |
b885bf36 | 3459 | st.st_size = -1; |
0de6b8f4 | 3460 | if (!NILP (Vcoding_system_for_read)) |
22d92d6b | 3461 | Fset (Qbuffer_file_coding_system, Vcoding_system_for_read); |
570d7624 JB |
3462 | goto notfound; |
3463 | } | |
3464 | ||
41d48a42 PE |
3465 | fd_index = SPECPDL_INDEX (); |
3466 | record_unwind_protect_int (close_file_unwind, fd); | |
3467 | ||
67722112 PE |
3468 | /* Replacement should preserve point as it preserves markers. */ |
3469 | if (!NILP (replace)) | |
3470 | record_unwind_protect (restore_point_unwind, Fpoint_marker ()); | |
3471 | ||
67722112 | 3472 | if (fstat (fd, &st) != 0) |
a9757f6a | 3473 | report_file_error ("Input file status", orig_filename); |
67722112 PE |
3474 | mtime = get_stat_mtime (&st); |
3475 | ||
be53b411 JB |
3476 | /* This code will need to be changed in order to work on named |
3477 | pipes, and it's probably just not worth it. So we should at | |
3478 | least signal an error. */ | |
99bc28f4 | 3479 | if (!S_ISREG (st.st_mode)) |
330bfe57 | 3480 | { |
d4b8687b RS |
3481 | not_regular = 1; |
3482 | ||
3483 | if (! NILP (visit)) | |
3484 | goto notfound; | |
3485 | ||
3486 | if (! NILP (replace) || ! NILP (beg) || ! NILP (end)) | |
24b1ddad KS |
3487 | xsignal2 (Qfile_error, |
3488 | build_string ("not a regular file"), orig_filename); | |
330bfe57 | 3489 | } |
be53b411 | 3490 | |
9f57b6b4 KH |
3491 | if (!NILP (visit)) |
3492 | { | |
3493 | if (!NILP (beg) || !NILP (end)) | |
3494 | error ("Attempt to visit less than an entire file"); | |
3495 | if (BEG < Z && NILP (replace)) | |
3496 | error ("Cannot do file visiting in a non-empty buffer"); | |
3497 | } | |
7fded690 JB |
3498 | |
3499 | if (!NILP (beg)) | |
b3fbb395 | 3500 | beg_offset = file_offset (beg); |
7fded690 | 3501 | else |
728f8f0a | 3502 | beg_offset = 0; |
7fded690 JB |
3503 | |
3504 | if (!NILP (end)) | |
b3fbb395 | 3505 | end_offset = file_offset (end); |
7fded690 JB |
3506 | else |
3507 | { | |
728f8f0a PE |
3508 | if (not_regular) |
3509 | end_offset = TYPE_MAXIMUM (off_t); | |
3510 | else | |
d4b8687b | 3511 | { |
728f8f0a PE |
3512 | end_offset = st.st_size; |
3513 | ||
3514 | /* A negative size can happen on a platform that allows file | |
3515 | sizes greater than the maximum off_t value. */ | |
3516 | if (end_offset < 0) | |
3517 | buffer_overflow (); | |
68c45bf0 | 3518 | |
d21dd12d GM |
3519 | /* The file size returned from stat may be zero, but data |
3520 | may be readable nonetheless, for example when this is a | |
3521 | file in the /proc filesystem. */ | |
728f8f0a PE |
3522 | if (end_offset == 0) |
3523 | end_offset = READ_BUF_SIZE; | |
d4b8687b | 3524 | } |
7fded690 JB |
3525 | } |
3526 | ||
728f8f0a PE |
3527 | /* Check now whether the buffer will become too large, |
3528 | in the likely case where the file's length is not changing. | |
3529 | This saves a lot of needless work before a buffer overflow. */ | |
3530 | if (! not_regular) | |
3531 | { | |
3532 | /* The likely offset where we will stop reading. We could read | |
3533 | more (or less), if the file grows (or shrinks) as we read it. */ | |
3534 | off_t likely_end = min (end_offset, st.st_size); | |
3535 | ||
3536 | if (beg_offset < likely_end) | |
3537 | { | |
ce2fe65a AS |
3538 | ptrdiff_t buf_bytes |
3539 | = Z_BYTE - (!NILP (replace) ? ZV_BYTE - BEGV_BYTE : 0); | |
728f8f0a PE |
3540 | ptrdiff_t buf_growth_max = BUF_BYTES_MAX - buf_bytes; |
3541 | off_t likely_growth = likely_end - beg_offset; | |
3542 | if (buf_growth_max < likely_growth) | |
3543 | buffer_overflow (); | |
3544 | } | |
3545 | } | |
3546 | ||
3547 | /* Prevent redisplay optimizations. */ | |
3548 | current_buffer->clip_changed = 1; | |
3549 | ||
356a6224 | 3550 | if (EQ (Vcoding_system_for_read, Qauto_save_coding)) |
5560aecd | 3551 | { |
75421805 | 3552 | coding_system = coding_inherit_eol_type (Qutf_8_emacs, Qunix); |
5560aecd KH |
3553 | setup_coding_system (coding_system, &coding); |
3554 | /* Ensure we set Vlast_coding_system_used. */ | |
3555 | set_coding_system = 1; | |
3556 | } | |
356a6224 | 3557 | else if (BEG < Z) |
f736ffbf KH |
3558 | { |
3559 | /* Decide the coding system to use for reading the file now | |
3560 | because we can't use an optimized method for handling | |
3561 | `coding:' tag if the current buffer is not empty. */ | |
f736ffbf | 3562 | if (!NILP (Vcoding_system_for_read)) |
db327c7e | 3563 | coding_system = Vcoding_system_for_read; |
f736ffbf KH |
3564 | else |
3565 | { | |
3566 | /* Don't try looking inside a file for a coding system | |
3567 | specification if it is not seekable. */ | |
3568 | if (! not_regular && ! NILP (Vset_auto_coding_function)) | |
3569 | { | |
3570 | /* Find a coding system specified in the heading two | |
3571 | lines or in the tailing several lines of the file. | |
3572 | We assume that the 1K-byte and 3K-byte for heading | |
003a7eaa | 3573 | and tailing respectively are sufficient for this |
f736ffbf | 3574 | purpose. */ |
d311d28c | 3575 | int nread; |
f736ffbf KH |
3576 | |
3577 | if (st.st_size <= (1024 * 4)) | |
68c45bf0 | 3578 | nread = emacs_read (fd, read_buf, 1024 * 4); |
f736ffbf KH |
3579 | else |
3580 | { | |
68c45bf0 | 3581 | nread = emacs_read (fd, read_buf, 1024); |
4c95c9a5 | 3582 | if (nread == 1024) |
f736ffbf | 3583 | { |
4c95c9a5 PE |
3584 | int ntail; |
3585 | if (lseek (fd, - (1024 * 3), SEEK_END) < 0) | |
f736ffbf | 3586 | report_file_error ("Setting file position", |
a9757f6a | 3587 | orig_filename); |
4c95c9a5 PE |
3588 | ntail = emacs_read (fd, read_buf + nread, 1024 * 3); |
3589 | nread = ntail < 0 ? ntail : nread + ntail; | |
f736ffbf KH |
3590 | } |
3591 | } | |
feb9dc27 | 3592 | |
f736ffbf | 3593 | if (nread < 0) |
4e604a5d | 3594 | report_file_error ("Read error", orig_filename); |
f736ffbf KH |
3595 | else if (nread > 0) |
3596 | { | |
f736ffbf | 3597 | struct buffer *prev = current_buffer; |
f839df0c | 3598 | Lisp_Object workbuf; |
685fc579 | 3599 | struct buffer *buf; |
f736ffbf | 3600 | |
66322887 | 3601 | record_unwind_current_buffer (); |
1d92afcd | 3602 | |
f839df0c PE |
3603 | workbuf = Fget_buffer_create (build_string (" *code-converting-work*")); |
3604 | buf = XBUFFER (workbuf); | |
685fc579 | 3605 | |
29ea8ae9 | 3606 | delete_all_overlays (buf); |
39eb03f1 PE |
3607 | bset_directory (buf, BVAR (current_buffer, directory)); |
3608 | bset_read_only (buf, Qnil); | |
3609 | bset_filename (buf, Qnil); | |
3610 | bset_undo_list (buf, Qt); | |
fd318b54 DA |
3611 | eassert (buf->overlays_before == NULL); |
3612 | eassert (buf->overlays_after == NULL); | |
efdc16c9 | 3613 | |
685fc579 RS |
3614 | set_buffer_internal (buf); |
3615 | Ferase_buffer (); | |
39eb03f1 | 3616 | bset_enable_multibyte_characters (buf, Qnil); |
685fc579 | 3617 | |
b68864e5 | 3618 | insert_1_both ((char *) read_buf, nread, nread, 0, 0, 0); |
f736ffbf | 3619 | TEMP_SET_PT_BOTH (BEG, BEG_BYTE); |
db327c7e | 3620 | coding_system = call2 (Vset_auto_coding_function, |
8f924df7 | 3621 | filename, make_number (nread)); |
f736ffbf | 3622 | set_buffer_internal (prev); |
efdc16c9 | 3623 | |
f736ffbf KH |
3624 | /* Discard the unwind protect for recovering the |
3625 | current buffer. */ | |
3626 | specpdl_ptr--; | |
3627 | ||
3628 | /* Rewind the file for the actual read done later. */ | |
e69dafad | 3629 | if (lseek (fd, 0, SEEK_SET) < 0) |
a9757f6a | 3630 | report_file_error ("Setting file position", orig_filename); |
f736ffbf KH |
3631 | } |
3632 | } | |
feb9dc27 | 3633 | |
db327c7e | 3634 | if (NILP (coding_system)) |
f736ffbf KH |
3635 | { |
3636 | /* If we have not yet decided a coding system, check | |
3637 | file-coding-system-alist. */ | |
8f924df7 | 3638 | Lisp_Object args[6]; |
f736ffbf KH |
3639 | |
3640 | args[0] = Qinsert_file_contents, args[1] = orig_filename; | |
3641 | args[2] = visit, args[3] = beg, args[4] = end, args[5] = replace; | |
8f924df7 KH |
3642 | coding_system = Ffind_operation_coding_system (6, args); |
3643 | if (CONSP (coding_system)) | |
3644 | coding_system = XCAR (coding_system); | |
f736ffbf KH |
3645 | } |
3646 | } | |
c9e82392 | 3647 | |
db327c7e KH |
3648 | if (NILP (coding_system)) |
3649 | coding_system = Qundecided; | |
3650 | else | |
3651 | CHECK_CODING_SYSTEM (coding_system); | |
c8a6d68a | 3652 | |
4b4deea2 | 3653 | if (NILP (BVAR (current_buffer, enable_multibyte_characters))) |
237a6fd2 RS |
3654 | /* We must suppress all character code conversion except for |
3655 | end-of-line conversion. */ | |
db327c7e | 3656 | coding_system = raw_text_coding_system (coding_system); |
54369368 | 3657 | |
db327c7e KH |
3658 | setup_coding_system (coding_system, &coding); |
3659 | /* Ensure we set Vlast_coding_system_used. */ | |
3660 | set_coding_system = 1; | |
f736ffbf | 3661 | } |
6cf71bf1 | 3662 | |
3d0387c0 RS |
3663 | /* If requested, replace the accessible part of the buffer |
3664 | with the file contents. Avoid replacing text at the | |
3665 | beginning or end of the buffer that matches the file contents; | |
3dbcf3f6 RS |
3666 | that preserves markers pointing to the unchanged parts. |
3667 | ||
3668 | Here we implement this feature in an optimized way | |
3669 | for the case where code conversion is NOT needed. | |
3670 | The following if-statement handles the case of conversion | |
727a0b4a RS |
3671 | in a less optimal way. |
3672 | ||
3673 | If the code conversion is "automatic" then we try using this | |
3674 | method and hope for the best. | |
3675 | But if we discover the need for conversion, we give up on this method | |
3676 | and let the following if-statement handle the replace job. */ | |
3dbcf3f6 | 3677 | if (!NILP (replace) |
f736ffbf | 3678 | && BEGV < ZV |
db327c7e KH |
3679 | && (NILP (coding_system) |
3680 | || ! CODING_REQUIRE_DECODING (&coding))) | |
3d0387c0 | 3681 | { |
ec7adf26 RS |
3682 | /* same_at_start and same_at_end count bytes, |
3683 | because file access counts bytes | |
3684 | and BEG and END count bytes. */ | |
d311d28c PE |
3685 | ptrdiff_t same_at_start = BEGV_BYTE; |
3686 | ptrdiff_t same_at_end = ZV_BYTE; | |
3687 | ptrdiff_t overlap; | |
6fdaa9a0 | 3688 | /* There is still a possibility we will find the need to do code |
f75d7a91 | 3689 | conversion. If that happens, set this variable to |
727a0b4a | 3690 | give up on handling REPLACE in the optimized way. */ |
f75d7a91 | 3691 | bool giveup_match_end = 0; |
9c28748f | 3692 | |
728f8f0a | 3693 | if (beg_offset != 0) |
4d2a0879 | 3694 | { |
728f8f0a | 3695 | if (lseek (fd, beg_offset, SEEK_SET) < 0) |
a9757f6a | 3696 | report_file_error ("Setting file position", orig_filename); |
4d2a0879 RS |
3697 | } |
3698 | ||
3d0387c0 RS |
3699 | immediate_quit = 1; |
3700 | QUIT; | |
3701 | /* Count how many chars at the start of the file | |
3702 | match the text at the beginning of the buffer. */ | |
3703 | while (1) | |
3704 | { | |
d311d28c | 3705 | int nread, bufpos; |
3d0387c0 | 3706 | |
2ef88fd4 | 3707 | nread = emacs_read (fd, read_buf, sizeof read_buf); |
3d0387c0 | 3708 | if (nread < 0) |
4e604a5d | 3709 | report_file_error ("Read error", orig_filename); |
3d0387c0 RS |
3710 | else if (nread == 0) |
3711 | break; | |
6fdaa9a0 | 3712 | |
db327c7e | 3713 | if (CODING_REQUIRE_DETECTION (&coding)) |
727a0b4a | 3714 | { |
2ef88fd4 | 3715 | coding_system = detect_coding_system ((unsigned char *) read_buf, |
5976c3fe | 3716 | nread, nread, 1, 0, |
db327c7e KH |
3717 | coding_system); |
3718 | setup_coding_system (coding_system, &coding); | |
727a0b4a RS |
3719 | } |
3720 | ||
db327c7e KH |
3721 | if (CODING_REQUIRE_DECODING (&coding)) |
3722 | /* We found that the file should be decoded somehow. | |
727a0b4a RS |
3723 | Let's give up here. */ |
3724 | { | |
3725 | giveup_match_end = 1; | |
3726 | break; | |
3727 | } | |
3728 | ||
3d0387c0 | 3729 | bufpos = 0; |
ec7adf26 | 3730 | while (bufpos < nread && same_at_start < ZV_BYTE |
2ef88fd4 | 3731 | && FETCH_BYTE (same_at_start) == read_buf[bufpos]) |
3d0387c0 RS |
3732 | same_at_start++, bufpos++; |
3733 | /* If we found a discrepancy, stop the scan. | |
8e6208c5 | 3734 | Otherwise loop around and scan the next bufferful. */ |
3d0387c0 RS |
3735 | if (bufpos != nread) |
3736 | break; | |
3737 | } | |
3738 | immediate_quit = 0; | |
3739 | /* If the file matches the buffer completely, | |
3740 | there's no need to replace anything. */ | |
2ba8e008 | 3741 | if (same_at_start - BEGV_BYTE == end_offset - beg_offset) |
3d0387c0 | 3742 | { |
68c45bf0 | 3743 | emacs_close (fd); |
b6806029 | 3744 | clear_unwind_protect (fd_index); |
9d611ffe | 3745 | |
1051b3b3 | 3746 | /* Truncate the buffer to the size of the file. */ |
7dae4502 | 3747 | del_range_1 (same_at_start, same_at_end, 0, 0); |
3d0387c0 RS |
3748 | goto handled; |
3749 | } | |
3750 | immediate_quit = 1; | |
3751 | QUIT; | |
3752 | /* Count how many chars at the end of the file | |
6fdaa9a0 KH |
3753 | match the text at the end of the buffer. But, if we have |
3754 | already found that decoding is necessary, don't waste time. */ | |
3755 | while (!giveup_match_end) | |
3d0387c0 | 3756 | { |
728f8f0a PE |
3757 | int total_read, nread, bufpos, trial; |
3758 | off_t curpos; | |
3d0387c0 RS |
3759 | |
3760 | /* At what file position are we now scanning? */ | |
728f8f0a | 3761 | curpos = end_offset - (ZV_BYTE - same_at_end); |
fc81fa9e KH |
3762 | /* If the entire file matches the buffer tail, stop the scan. */ |
3763 | if (curpos == 0) | |
3764 | break; | |
3d0387c0 | 3765 | /* How much can we scan in the next step? */ |
2ef88fd4 | 3766 | trial = min (curpos, sizeof read_buf); |
728f8f0a | 3767 | if (lseek (fd, curpos - trial, SEEK_SET) < 0) |
a9757f6a | 3768 | report_file_error ("Setting file position", orig_filename); |
3d0387c0 | 3769 | |
b02439c8 | 3770 | total_read = nread = 0; |
3d0387c0 RS |
3771 | while (total_read < trial) |
3772 | { | |
2ef88fd4 | 3773 | nread = emacs_read (fd, read_buf + total_read, trial - total_read); |
2bd2273e | 3774 | if (nread < 0) |
4e604a5d | 3775 | report_file_error ("Read error", orig_filename); |
2bd2273e GM |
3776 | else if (nread == 0) |
3777 | break; | |
3d0387c0 RS |
3778 | total_read += nread; |
3779 | } | |
efdc16c9 | 3780 | |
8e6208c5 | 3781 | /* Scan this bufferful from the end, comparing with |
3d0387c0 RS |
3782 | the Emacs buffer. */ |
3783 | bufpos = total_read; | |
efdc16c9 | 3784 | |
3d0387c0 RS |
3785 | /* Compare with same_at_start to avoid counting some buffer text |
3786 | as matching both at the file's beginning and at the end. */ | |
3787 | while (bufpos > 0 && same_at_end > same_at_start | |
2ef88fd4 | 3788 | && FETCH_BYTE (same_at_end - 1) == read_buf[bufpos - 1]) |
3d0387c0 | 3789 | same_at_end--, bufpos--; |
727a0b4a | 3790 | |
3d0387c0 | 3791 | /* If we found a discrepancy, stop the scan. |
8e6208c5 | 3792 | Otherwise loop around and scan the preceding bufferful. */ |
3d0387c0 | 3793 | if (bufpos != 0) |
727a0b4a RS |
3794 | { |
3795 | /* If this discrepancy is because of code conversion, | |
3796 | we cannot use this method; giveup and try the other. */ | |
3797 | if (same_at_end > same_at_start | |
3798 | && FETCH_BYTE (same_at_end - 1) >= 0200 | |
4b4deea2 | 3799 | && ! NILP (BVAR (current_buffer, enable_multibyte_characters)) |
c8a6d68a | 3800 | && (CODING_MAY_REQUIRE_DECODING (&coding))) |
727a0b4a RS |
3801 | giveup_match_end = 1; |
3802 | break; | |
3803 | } | |
b02439c8 GM |
3804 | |
3805 | if (nread == 0) | |
3806 | break; | |
3d0387c0 RS |
3807 | } |
3808 | immediate_quit = 0; | |
9c28748f | 3809 | |
727a0b4a RS |
3810 | if (! giveup_match_end) |
3811 | { | |
d311d28c | 3812 | ptrdiff_t temp; |
ec7adf26 | 3813 | |
727a0b4a | 3814 | /* We win! We can handle REPLACE the optimized way. */ |
9c28748f | 3815 | |
20f6783d RS |
3816 | /* Extend the start of non-matching text area to multibyte |
3817 | character boundary. */ | |
4b4deea2 | 3818 | if (! NILP (BVAR (current_buffer, enable_multibyte_characters))) |
20f6783d RS |
3819 | while (same_at_start > BEGV_BYTE |
3820 | && ! CHAR_HEAD_P (FETCH_BYTE (same_at_start))) | |
3821 | same_at_start--; | |
3822 | ||
3823 | /* Extend the end of non-matching text area to multibyte | |
71312b68 | 3824 | character boundary. */ |
4b4deea2 | 3825 | if (! NILP (BVAR (current_buffer, enable_multibyte_characters))) |
ec7adf26 RS |
3826 | while (same_at_end < ZV_BYTE |
3827 | && ! CHAR_HEAD_P (FETCH_BYTE (same_at_end))) | |
71312b68 RS |
3828 | same_at_end++; |
3829 | ||
727a0b4a | 3830 | /* Don't try to reuse the same piece of text twice. */ |
ec7adf26 | 3831 | overlap = (same_at_start - BEGV_BYTE |
728f8f0a PE |
3832 | - (same_at_end |
3833 | + (! NILP (end) ? end_offset : st.st_size) - ZV_BYTE)); | |
727a0b4a RS |
3834 | if (overlap > 0) |
3835 | same_at_end += overlap; | |
9c28748f | 3836 | |
727a0b4a | 3837 | /* Arrange to read only the nonmatching middle part of the file. */ |
728f8f0a PE |
3838 | beg_offset += same_at_start - BEGV_BYTE; |
3839 | end_offset -= ZV_BYTE - same_at_end; | |
3dbcf3f6 | 3840 | |
de1e0d91 EZ |
3841 | invalidate_buffer_caches (current_buffer, |
3842 | BYTE_TO_CHAR (same_at_start), | |
3843 | BYTE_TO_CHAR (same_at_end)); | |
ec7adf26 | 3844 | del_range_byte (same_at_start, same_at_end, 0); |
727a0b4a | 3845 | /* Insert from the file at the proper position. */ |
ec7adf26 RS |
3846 | temp = BYTE_TO_CHAR (same_at_start); |
3847 | SET_PT_BOTH (temp, same_at_start); | |
727a0b4a RS |
3848 | |
3849 | /* If display currently starts at beginning of line, | |
3850 | keep it that way. */ | |
e74aeda8 | 3851 | if (XBUFFER (XWINDOW (selected_window)->contents) == current_buffer) |
c98ff5dd | 3852 | XWINDOW (selected_window)->start_at_line_beg = !NILP (Fbolp ()); |
727a0b4a RS |
3853 | |
3854 | replace_handled = 1; | |
3855 | } | |
3dbcf3f6 RS |
3856 | } |
3857 | ||
3858 | /* If requested, replace the accessible part of the buffer | |
3859 | with the file contents. Avoid replacing text at the | |
3860 | beginning or end of the buffer that matches the file contents; | |
3861 | that preserves markers pointing to the unchanged parts. | |
3862 | ||
3863 | Here we implement this feature for the case where code conversion | |
3864 | is needed, in a simple way that needs a lot of memory. | |
3865 | The preceding if-statement handles the case of no conversion | |
3866 | in a more optimized way. */ | |
f736ffbf | 3867 | if (!NILP (replace) && ! replace_handled && BEGV < ZV) |
3dbcf3f6 | 3868 | { |
d311d28c PE |
3869 | ptrdiff_t same_at_start = BEGV_BYTE; |
3870 | ptrdiff_t same_at_end = ZV_BYTE; | |
3871 | ptrdiff_t same_at_start_charpos; | |
3872 | ptrdiff_t inserted_chars; | |
3873 | ptrdiff_t overlap; | |
3874 | ptrdiff_t bufpos; | |
db327c7e | 3875 | unsigned char *decoded; |
d311d28c PE |
3876 | ptrdiff_t temp; |
3877 | ptrdiff_t this = 0; | |
3878 | ptrdiff_t this_count = SPECPDL_INDEX (); | |
f10fe38f PE |
3879 | bool multibyte |
3880 | = ! NILP (BVAR (current_buffer, enable_multibyte_characters)); | |
5b359650 | 3881 | Lisp_Object conversion_buffer; |
83aca1cb | 3882 | struct gcpro gcpro1; |
db327c7e | 3883 | |
5b359650 | 3884 | conversion_buffer = code_conversion_save (1, multibyte); |
3dbcf3f6 RS |
3885 | |
3886 | /* First read the whole file, performing code conversion into | |
3887 | CONVERSION_BUFFER. */ | |
3888 | ||
728f8f0a | 3889 | if (lseek (fd, beg_offset, SEEK_SET) < 0) |
a9757f6a | 3890 | report_file_error ("Setting file position", orig_filename); |
727a0b4a | 3891 | |
3dbcf3f6 RS |
3892 | inserted = 0; /* Bytes put into CONVERSION_BUFFER so far. */ |
3893 | unprocessed = 0; /* Bytes not processed in previous loop. */ | |
3894 | ||
2ba48777 | 3895 | GCPRO1 (conversion_buffer); |
b41b8a7e | 3896 | while (1) |
3dbcf3f6 | 3897 | { |
b41b8a7e PE |
3898 | /* Read at most READ_BUF_SIZE bytes at a time, to allow |
3899 | quitting while reading a huge file. */ | |
3dbcf3f6 RS |
3900 | |
3901 | /* Allow quitting out of the actual I/O. */ | |
3902 | immediate_quit = 1; | |
3903 | QUIT; | |
b41b8a7e PE |
3904 | this = emacs_read (fd, read_buf + unprocessed, |
3905 | READ_BUF_SIZE - unprocessed); | |
3dbcf3f6 RS |
3906 | immediate_quit = 0; |
3907 | ||
db327c7e | 3908 | if (this <= 0) |
43aae36e | 3909 | break; |
3dbcf3f6 | 3910 | |
bf1c0f27 SM |
3911 | BUF_TEMP_SET_PT (XBUFFER (conversion_buffer), |
3912 | BUF_Z (XBUFFER (conversion_buffer))); | |
5976c3fe PE |
3913 | decode_coding_c_string (&coding, (unsigned char *) read_buf, |
3914 | unprocessed + this, conversion_buffer); | |
db327c7e KH |
3915 | unprocessed = coding.carryover_bytes; |
3916 | if (coding.carryover_bytes > 0) | |
72af86bd | 3917 | memcpy (read_buf, coding.carryover, unprocessed); |
3dbcf3f6 | 3918 | } |
2ba48777 | 3919 | UNGCPRO; |
43aae36e | 3920 | if (this < 0) |
4e604a5d | 3921 | report_file_error ("Read error", orig_filename); |
41d48a42 | 3922 | emacs_close (fd); |
a0931322 | 3923 | clear_unwind_protect (fd_index); |
3dbcf3f6 | 3924 | |
db327c7e KH |
3925 | if (unprocessed > 0) |
3926 | { | |
3927 | coding.mode |= CODING_MODE_LAST_BLOCK; | |
5976c3fe PE |
3928 | decode_coding_c_string (&coding, (unsigned char *) read_buf, |
3929 | unprocessed, conversion_buffer); | |
db327c7e KH |
3930 | coding.mode &= ~CODING_MODE_LAST_BLOCK; |
3931 | } | |
3932 | ||
50b06221 | 3933 | coding_system = CODING_ID_NAME (coding.id); |
f6a07420 | 3934 | set_coding_system = 1; |
db327c7e | 3935 | decoded = BUF_BEG_ADDR (XBUFFER (conversion_buffer)); |
50342b35 KH |
3936 | inserted = (BUF_Z_BYTE (XBUFFER (conversion_buffer)) |
3937 | - BUF_BEG_BYTE (XBUFFER (conversion_buffer))); | |
db327c7e KH |
3938 | |
3939 | /* Compare the beginning of the converted string with the buffer | |
3940 | text. */ | |
3dbcf3f6 RS |
3941 | |
3942 | bufpos = 0; | |
3943 | while (bufpos < inserted && same_at_start < same_at_end | |
db327c7e | 3944 | && FETCH_BYTE (same_at_start) == decoded[bufpos]) |
3dbcf3f6 RS |
3945 | same_at_start++, bufpos++; |
3946 | ||
db327c7e | 3947 | /* If the file matches the head of buffer completely, |
3dbcf3f6 RS |
3948 | there's no need to replace anything. */ |
3949 | ||
3950 | if (bufpos == inserted) | |
3951 | { | |
3dbcf3f6 | 3952 | /* Truncate the buffer to the size of the file. */ |
0e64479a | 3953 | if (same_at_start != same_at_end) |
de1e0d91 EZ |
3954 | { |
3955 | invalidate_buffer_caches (current_buffer, | |
3956 | BYTE_TO_CHAR (same_at_start), | |
3957 | BYTE_TO_CHAR (same_at_end)); | |
3958 | del_range_byte (same_at_start, same_at_end, 0); | |
3959 | } | |
427f5aab | 3960 | inserted = 0; |
e8553dd1 KH |
3961 | |
3962 | unbind_to (this_count, Qnil); | |
3dbcf3f6 RS |
3963 | goto handled; |
3964 | } | |
3965 | ||
db327c7e KH |
3966 | /* Extend the start of non-matching text area to the previous |
3967 | multibyte character boundary. */ | |
4b4deea2 | 3968 | if (! NILP (BVAR (current_buffer, enable_multibyte_characters))) |
20f6783d RS |
3969 | while (same_at_start > BEGV_BYTE |
3970 | && ! CHAR_HEAD_P (FETCH_BYTE (same_at_start))) | |
3971 | same_at_start--; | |
3972 | ||
3dbcf3f6 RS |
3973 | /* Scan this bufferful from the end, comparing with |
3974 | the Emacs buffer. */ | |
3975 | bufpos = inserted; | |
3976 | ||
3977 | /* Compare with same_at_start to avoid counting some buffer text | |
3978 | as matching both at the file's beginning and at the end. */ | |
3979 | while (bufpos > 0 && same_at_end > same_at_start | |
db327c7e | 3980 | && FETCH_BYTE (same_at_end - 1) == decoded[bufpos - 1]) |
3dbcf3f6 RS |
3981 | same_at_end--, bufpos--; |
3982 | ||
db327c7e KH |
3983 | /* Extend the end of non-matching text area to the next |
3984 | multibyte character boundary. */ | |
4b4deea2 | 3985 | if (! NILP (BVAR (current_buffer, enable_multibyte_characters))) |
20f6783d RS |
3986 | while (same_at_end < ZV_BYTE |
3987 | && ! CHAR_HEAD_P (FETCH_BYTE (same_at_end))) | |
3988 | same_at_end++; | |
3989 | ||
3dbcf3f6 | 3990 | /* Don't try to reuse the same piece of text twice. */ |
ec7adf26 | 3991 | overlap = same_at_start - BEGV_BYTE - (same_at_end + inserted - ZV_BYTE); |
3dbcf3f6 RS |
3992 | if (overlap > 0) |
3993 | same_at_end += overlap; | |
3994 | ||
727a0b4a RS |
3995 | /* If display currently starts at beginning of line, |
3996 | keep it that way. */ | |
e74aeda8 | 3997 | if (XBUFFER (XWINDOW (selected_window)->contents) == current_buffer) |
c98ff5dd | 3998 | XWINDOW (selected_window)->start_at_line_beg = !NILP (Fbolp ()); |
727a0b4a | 3999 | |
3dbcf3f6 RS |
4000 | /* Replace the chars that we need to replace, |
4001 | and update INSERTED to equal the number of bytes | |
db327c7e | 4002 | we are taking from the decoded string. */ |
4b70e2c9 | 4003 | inserted -= (ZV_BYTE - same_at_end) + (same_at_start - BEGV_BYTE); |
427f5aab | 4004 | |
643c73b9 | 4005 | if (same_at_end != same_at_start) |
427f5aab | 4006 | { |
de1e0d91 EZ |
4007 | invalidate_buffer_caches (current_buffer, |
4008 | BYTE_TO_CHAR (same_at_start), | |
4009 | BYTE_TO_CHAR (same_at_end)); | |
427f5aab KH |
4010 | del_range_byte (same_at_start, same_at_end, 0); |
4011 | temp = GPT; | |
22513e52 | 4012 | eassert (same_at_start == GPT_BYTE); |
427f5aab KH |
4013 | same_at_start = GPT_BYTE; |
4014 | } | |
643c73b9 RS |
4015 | else |
4016 | { | |
643c73b9 | 4017 | temp = BYTE_TO_CHAR (same_at_start); |
643c73b9 | 4018 | } |
427f5aab KH |
4019 | /* Insert from the file at the proper position. */ |
4020 | SET_PT_BOTH (temp, same_at_start); | |
50342b35 KH |
4021 | same_at_start_charpos |
4022 | = buf_bytepos_to_charpos (XBUFFER (conversion_buffer), | |
7f5d2c72 SM |
4023 | same_at_start - BEGV_BYTE |
4024 | + BUF_BEG_BYTE (XBUFFER (conversion_buffer))); | |
22513e52 | 4025 | eassert (same_at_start_charpos == temp - (BEGV - BEG)); |
50342b35 KH |
4026 | inserted_chars |
4027 | = (buf_bytepos_to_charpos (XBUFFER (conversion_buffer), | |
7f5d2c72 SM |
4028 | same_at_start + inserted - BEGV_BYTE |
4029 | + BUF_BEG_BYTE (XBUFFER (conversion_buffer))) | |
50342b35 | 4030 | - same_at_start_charpos); |
d07af40d KH |
4031 | /* This binding is to avoid ask-user-about-supersession-threat |
4032 | being called in insert_from_buffer (via in | |
4033 | prepare_to_modify_buffer). */ | |
4034 | specbind (intern ("buffer-file-name"), Qnil); | |
db327c7e | 4035 | insert_from_buffer (XBUFFER (conversion_buffer), |
50342b35 | 4036 | same_at_start_charpos, inserted_chars, 0); |
427f5aab KH |
4037 | /* Set `inserted' to the number of inserted characters. */ |
4038 | inserted = PT - temp; | |
77343e1d KH |
4039 | /* Set point before the inserted characters. */ |
4040 | SET_PT_BOTH (temp, same_at_start); | |
3dbcf3f6 | 4041 | |
db327c7e | 4042 | unbind_to (this_count, Qnil); |
3dbcf3f6 | 4043 | |
3dbcf3f6 | 4044 | goto handled; |
3d0387c0 RS |
4045 | } |
4046 | ||
d4b8687b | 4047 | if (! not_regular) |
728f8f0a | 4048 | total = end_offset - beg_offset; |
d4b8687b RS |
4049 | else |
4050 | /* For a special file, all we can do is guess. */ | |
4051 | total = READ_BUF_SIZE; | |
570d7624 | 4052 | |
8b913b57 | 4053 | if (NILP (visit) && total > 0) |
68780e2a RS |
4054 | { |
4055 | #ifdef CLASH_DETECTION | |
4b4deea2 | 4056 | if (!NILP (BVAR (current_buffer, file_truename)) |
68780e2a | 4057 | /* Make binding buffer-file-name to nil effective. */ |
4b4deea2 | 4058 | && !NILP (BVAR (current_buffer, filename)) |
68780e2a RS |
4059 | && SAVE_MODIFF >= MODIFF) |
4060 | we_locked_file = 1; | |
4061 | #endif /* CLASH_DETECTION */ | |
4062 | prepare_to_modify_buffer (GPT, GPT, NULL); | |
4063 | } | |
570d7624 | 4064 | |
13002885 | 4065 | move_gap_both (PT, PT_BYTE); |
7fded690 JB |
4066 | if (GAP_SIZE < total) |
4067 | make_gap (total - GAP_SIZE); | |
4068 | ||
728f8f0a | 4069 | if (beg_offset != 0 || !NILP (replace)) |
7fded690 | 4070 | { |
728f8f0a | 4071 | if (lseek (fd, beg_offset, SEEK_SET) < 0) |
a9757f6a | 4072 | report_file_error ("Setting file position", orig_filename); |
7fded690 JB |
4073 | } |
4074 | ||
2ef88fd4 DA |
4075 | /* In the following loop, HOW_MUCH contains the total bytes read so |
4076 | far for a regular file, and not changed for a special file. But, | |
4077 | before exiting the loop, it is set to a negative value if I/O | |
4078 | error occurs. */ | |
a1d2b64a | 4079 | how_much = 0; |
efdc16c9 | 4080 | |
6fdaa9a0 KH |
4081 | /* Total bytes inserted. */ |
4082 | inserted = 0; | |
efdc16c9 | 4083 | |
2ef88fd4 DA |
4084 | /* Here, we don't do code conversion in the loop. It is done by |
4085 | decode_coding_gap after all data are read into the buffer. */ | |
4086 | { | |
4087 | ptrdiff_t gap_size = GAP_SIZE; | |
1b978129 | 4088 | |
2ef88fd4 DA |
4089 | while (how_much < total) |
4090 | { | |
4091 | /* try is reserved in some compilers (Microsoft C) */ | |
4092 | ptrdiff_t trytry = min (total - how_much, READ_BUF_SIZE); | |
4093 | ptrdiff_t this; | |
1b978129 | 4094 | |
2ef88fd4 DA |
4095 | if (not_regular) |
4096 | { | |
4097 | Lisp_Object nbytes; | |
4098 | ||
4099 | /* Maybe make more room. */ | |
4100 | if (gap_size < trytry) | |
4101 | { | |
4102 | make_gap (trytry - gap_size); | |
4103 | gap_size = GAP_SIZE - inserted; | |
4104 | } | |
4105 | ||
4106 | /* Read from the file, capturing `quit'. When an | |
4107 | error occurs, end the loop, and arrange for a quit | |
4108 | to be signaled after decoding the text we read. */ | |
4109 | nbytes = internal_condition_case_1 | |
4110 | (read_non_regular, | |
1396ac86 | 4111 | make_save_int_int_int (fd, inserted, trytry), |
2ef88fd4 DA |
4112 | Qerror, read_non_regular_quit); |
4113 | ||
4114 | if (NILP (nbytes)) | |
4115 | { | |
4116 | read_quit = 1; | |
4117 | break; | |
4118 | } | |
4119 | ||
4120 | this = XINT (nbytes); | |
4121 | } | |
4122 | else | |
4123 | { | |
4124 | /* Allow quitting out of the actual I/O. We don't make text | |
4125 | part of the buffer until all the reading is done, so a C-g | |
4126 | here doesn't do any harm. */ | |
4127 | immediate_quit = 1; | |
4128 | QUIT; | |
4129 | this = emacs_read (fd, | |
4130 | ((char *) BEG_ADDR + PT_BYTE - BEG_BYTE | |
4131 | + inserted), | |
4132 | trytry); | |
4133 | immediate_quit = 0; | |
4134 | } | |
4135 | ||
4136 | if (this <= 0) | |
4137 | { | |
4138 | how_much = this; | |
4139 | break; | |
4140 | } | |
4141 | ||
4142 | gap_size -= this; | |
4143 | ||
4144 | /* For a regular file, where TOTAL is the real size, | |
4145 | count HOW_MUCH to compare with it. | |
4146 | For a special file, where TOTAL is just a buffer size, | |
4147 | so don't bother counting in HOW_MUCH. | |
4148 | (INSERTED is where we count the number of characters inserted.) */ | |
4149 | if (! not_regular) | |
4150 | how_much += this; | |
4151 | inserted += this; | |
4152 | } | |
4153 | } | |
1b978129 | 4154 | |
e07469fa DA |
4155 | /* Now we have either read all the file data into the gap, |
4156 | or stop reading on I/O error or quit. If nothing was | |
4157 | read, undo marking the buffer modified. */ | |
68780e2a RS |
4158 | |
4159 | if (inserted == 0) | |
4160 | { | |
6840d350 | 4161 | #ifdef CLASH_DETECTION |
68780e2a | 4162 | if (we_locked_file) |
4b4deea2 | 4163 | unlock_file (BVAR (current_buffer, file_truename)); |
6840d350 | 4164 | #endif |
68780e2a RS |
4165 | Vdeactivate_mark = old_Vdeactivate_mark; |
4166 | } | |
83c1cf6d RS |
4167 | else |
4168 | Vdeactivate_mark = Qt; | |
68780e2a | 4169 | |
68c45bf0 | 4170 | emacs_close (fd); |
a0931322 | 4171 | clear_unwind_protect (fd_index); |
6fdaa9a0 | 4172 | |
2ef88fd4 | 4173 | if (how_much < 0) |
4e604a5d | 4174 | report_file_error ("Read error", orig_filename); |
2ef88fd4 DA |
4175 | |
4176 | /* Make the text read part of the buffer. */ | |
4177 | GAP_SIZE -= inserted; | |
4178 | GPT += inserted; | |
4179 | GPT_BYTE += inserted; | |
4180 | ZV += inserted; | |
4181 | ZV_BYTE += inserted; | |
4182 | Z += inserted; | |
4183 | Z_BYTE += inserted; | |
4184 | ||
4185 | if (GAP_SIZE > 0) | |
4186 | /* Put an anchor to ensure multi-byte form ends at gap. */ | |
4187 | *GPT_ADDR = 0; | |
4188 | ||
f8569325 DL |
4189 | notfound: |
4190 | ||
db327c7e | 4191 | if (NILP (coding_system)) |
c8a6d68a | 4192 | { |
2df42e09 | 4193 | /* The coding system is not yet decided. Decide it by an |
dfe35e7b RS |
4194 | optimized method for handling `coding:' tag. |
4195 | ||
4196 | Note that we can get here only if the buffer was empty | |
4197 | before the insertion. */ | |
f736ffbf | 4198 | |
2df42e09 | 4199 | if (!NILP (Vcoding_system_for_read)) |
db327c7e | 4200 | coding_system = Vcoding_system_for_read; |
2df42e09 KH |
4201 | else |
4202 | { | |
98a7d268 KH |
4203 | /* Since we are sure that the current buffer was empty |
4204 | before the insertion, we can toggle | |
4205 | enable-multibyte-characters directly here without taking | |
9a7f80aa KH |
4206 | care of marker adjustment. By this way, we can run Lisp |
4207 | program safely before decoding the inserted text. */ | |
98a7d268 | 4208 | Lisp_Object unwind_data; |
d311d28c | 4209 | ptrdiff_t count1 = SPECPDL_INDEX (); |
2df42e09 | 4210 | |
4b4deea2 TT |
4211 | unwind_data = Fcons (BVAR (current_buffer, enable_multibyte_characters), |
4212 | Fcons (BVAR (current_buffer, undo_list), | |
98a7d268 | 4213 | Fcurrent_buffer ())); |
39eb03f1 PE |
4214 | bset_enable_multibyte_characters (current_buffer, Qnil); |
4215 | bset_undo_list (current_buffer, Qt); | |
98a7d268 KH |
4216 | record_unwind_protect (decide_coding_unwind, unwind_data); |
4217 | ||
4218 | if (inserted > 0 && ! NILP (Vset_auto_coding_function)) | |
4219 | { | |
db327c7e | 4220 | coding_system = call2 (Vset_auto_coding_function, |
8f924df7 | 4221 | filename, make_number (inserted)); |
2df42e09 | 4222 | } |
f736ffbf | 4223 | |
db327c7e | 4224 | if (NILP (coding_system)) |
2df42e09 KH |
4225 | { |
4226 | /* If the coding system is not yet decided, check | |
4227 | file-coding-system-alist. */ | |
8f924df7 | 4228 | Lisp_Object args[6]; |
f736ffbf | 4229 | |
2df42e09 KH |
4230 | args[0] = Qinsert_file_contents, args[1] = orig_filename; |
4231 | args[2] = visit, args[3] = beg, args[4] = end, args[5] = Qnil; | |
8f924df7 KH |
4232 | coding_system = Ffind_operation_coding_system (6, args); |
4233 | if (CONSP (coding_system)) | |
4234 | coding_system = XCAR (coding_system); | |
f736ffbf | 4235 | } |
f839df0c | 4236 | unbind_to (count1, Qnil); |
98a7d268 | 4237 | inserted = Z_BYTE - BEG_BYTE; |
2df42e09 | 4238 | } |
f736ffbf | 4239 | |
db327c7e KH |
4240 | if (NILP (coding_system)) |
4241 | coding_system = Qundecided; | |
4242 | else | |
4243 | CHECK_CODING_SYSTEM (coding_system); | |
f736ffbf | 4244 | |
4b4deea2 | 4245 | if (NILP (BVAR (current_buffer, enable_multibyte_characters))) |
237a6fd2 | 4246 | /* We must suppress all character code conversion except for |
2df42e09 | 4247 | end-of-line conversion. */ |
db327c7e | 4248 | coding_system = raw_text_coding_system (coding_system); |
db327c7e KH |
4249 | setup_coding_system (coding_system, &coding); |
4250 | /* Ensure we set Vlast_coding_system_used. */ | |
4251 | set_coding_system = 1; | |
2df42e09 | 4252 | } |
f736ffbf | 4253 | |
db327c7e | 4254 | if (!NILP (visit)) |
8c3b9441 | 4255 | { |
db327c7e | 4256 | /* When we visit a file by raw-text, we change the buffer to |
9a7f80aa | 4257 | unibyte. */ |
db327c7e KH |
4258 | if (CODING_FOR_UNIBYTE (&coding) |
4259 | /* Can't do this if part of the buffer might be preserved. */ | |
4260 | && NILP (replace)) | |
4261 | /* Visiting a file with these coding system makes the buffer | |
4262 | unibyte. */ | |
39eb03f1 | 4263 | bset_enable_multibyte_characters (current_buffer, Qnil); |
8c3b9441 KH |
4264 | } |
4265 | ||
4b4deea2 | 4266 | coding.dst_multibyte = ! NILP (BVAR (current_buffer, enable_multibyte_characters)); |
5b359650 | 4267 | if (CODING_MAY_REQUIRE_DECODING (&coding) |
1c157f8d | 4268 | && (inserted > 0 || CODING_REQUIRE_FLUSHING (&coding))) |
2df42e09 | 4269 | { |
db327c7e KH |
4270 | move_gap_both (PT, PT_BYTE); |
4271 | GAP_SIZE += inserted; | |
4272 | ZV_BYTE -= inserted; | |
4273 | Z_BYTE -= inserted; | |
4274 | ZV -= inserted; | |
4275 | Z -= inserted; | |
4276 | decode_coding_gap (&coding, inserted, inserted); | |
4277 | inserted = coding.produced_char; | |
5b359650 | 4278 | coding_system = CODING_ID_NAME (coding.id); |
2df42e09 | 4279 | } |
db327c7e KH |
4280 | else if (inserted > 0) |
4281 | adjust_after_insert (PT, PT_BYTE, PT + inserted, PT_BYTE + inserted, | |
4282 | inserted); | |
570d7624 | 4283 | |
0068070e SM |
4284 | /* Call after-change hooks for the inserted text, aside from the case |
4285 | of normal visiting (not with REPLACE), which is done in a new buffer | |
4286 | "before" the buffer is changed. */ | |
4287 | if (inserted > 0 && total > 0 | |
4288 | && (NILP (visit) || !NILP (replace))) | |
4289 | { | |
4290 | signal_after_change (PT, 0, inserted); | |
4291 | update_compositions (PT, PT, CHECK_BORDER); | |
4292 | } | |
4293 | ||
cf6d2357 RS |
4294 | /* Now INSERTED is measured in characters. */ |
4295 | ||
32f4334d | 4296 | handled: |
570d7624 | 4297 | |
265a9e55 | 4298 | if (!NILP (visit)) |
570d7624 | 4299 | { |
22513e52 | 4300 | if (empty_undo_list_p) |
39eb03f1 | 4301 | bset_undo_list (current_buffer, Qnil); |
62bcf009 | 4302 | |
a7e82472 RS |
4303 | if (NILP (handler)) |
4304 | { | |
dbeed9a6 | 4305 | current_buffer->modtime = mtime; |
58b963f7 | 4306 | current_buffer->modtime_size = st.st_size; |
39eb03f1 | 4307 | bset_filename (current_buffer, orig_filename); |
a7e82472 | 4308 | } |
62bcf009 | 4309 | |
95385625 | 4310 | SAVE_MODIFF = MODIFF; |
0b5397c2 | 4311 | BUF_AUTOSAVE_MODIFF (current_buffer) = MODIFF; |
4b4deea2 | 4312 | XSETFASTINT (BVAR (current_buffer, save_length), Z - BEG); |
570d7624 | 4313 | #ifdef CLASH_DETECTION |
32f4334d RS |
4314 | if (NILP (handler)) |
4315 | { | |
4b4deea2 TT |
4316 | if (!NILP (BVAR (current_buffer, file_truename))) |
4317 | unlock_file (BVAR (current_buffer, file_truename)); | |
32f4334d RS |
4318 | unlock_file (filename); |
4319 | } | |
570d7624 | 4320 | #endif /* CLASH_DETECTION */ |
330bfe57 | 4321 | if (not_regular) |
24b1ddad KS |
4322 | xsignal2 (Qfile_error, |
4323 | build_string ("not a regular file"), orig_filename); | |
570d7624 JB |
4324 | } |
4325 | ||
b6426b03 | 4326 | if (set_coding_system) |
8f924df7 | 4327 | Vlast_coding_system_used = coding_system; |
b6426b03 | 4328 | |
2080470e | 4329 | if (! NILP (Ffboundp (Qafter_insert_file_set_coding))) |
b6426b03 | 4330 | { |
37a3c774 KH |
4331 | insval = call2 (Qafter_insert_file_set_coding, make_number (inserted), |
4332 | visit); | |
b6426b03 KH |
4333 | if (! NILP (insval)) |
4334 | { | |
d311d28c PE |
4335 | if (! RANGED_INTEGERP (0, insval, ZV - PT)) |
4336 | wrong_type_argument (intern ("inserted-chars"), insval); | |
b6426b03 KH |
4337 | inserted = XFASTINT (insval); |
4338 | } | |
4339 | } | |
4340 | ||
6420e80c | 4341 | /* Decode file format. */ |
c8a6d68a | 4342 | if (inserted > 0) |
0d420e88 | 4343 | { |
6420e80c | 4344 | /* Don't run point motion or modification hooks when decoding. */ |
d311d28c PE |
4345 | ptrdiff_t count1 = SPECPDL_INDEX (); |
4346 | ptrdiff_t old_inserted = inserted; | |
6f2528d8 MR |
4347 | specbind (Qinhibit_point_motion_hooks, Qt); |
4348 | specbind (Qinhibit_modification_hooks, Qt); | |
4349 | ||
6420e80c | 4350 | /* Save old undo list and don't record undo for decoding. */ |
4b4deea2 | 4351 | old_undo = BVAR (current_buffer, undo_list); |
39eb03f1 | 4352 | bset_undo_list (current_buffer, Qt); |
efdc16c9 | 4353 | |
6f2528d8 | 4354 | if (NILP (replace)) |
ed8e506f | 4355 | { |
6f2528d8 MR |
4356 | insval = call3 (Qformat_decode, |
4357 | Qnil, make_number (inserted), visit); | |
d311d28c PE |
4358 | if (! RANGED_INTEGERP (0, insval, ZV - PT)) |
4359 | wrong_type_argument (intern ("inserted-chars"), insval); | |
6f2528d8 MR |
4360 | inserted = XFASTINT (insval); |
4361 | } | |
4362 | else | |
4363 | { | |
4364 | /* If REPLACE is non-nil and we succeeded in not replacing the | |
6420e80c AS |
4365 | beginning or end of the buffer text with the file's contents, |
4366 | call format-decode with `point' positioned at the beginning | |
fa463103 | 4367 | of the buffer and `inserted' equaling the number of |
6420e80c AS |
4368 | characters in the buffer. Otherwise, format-decode might |
4369 | fail to correctly analyze the beginning or end of the buffer. | |
4370 | Hence we temporarily save `point' and `inserted' here and | |
4371 | restore `point' iff format-decode did not insert or delete | |
4372 | any text. Otherwise we leave `point' at point-min. */ | |
d311d28c PE |
4373 | ptrdiff_t opoint = PT; |
4374 | ptrdiff_t opoint_byte = PT_BYTE; | |
4375 | ptrdiff_t oinserted = ZV - BEGV; | |
4376 | EMACS_INT ochars_modiff = CHARS_MODIFF; | |
1f163f28 MA |
4377 | |
4378 | TEMP_SET_PT_BOTH (BEGV, BEGV_BYTE); | |
6f2528d8 MR |
4379 | insval = call3 (Qformat_decode, |
4380 | Qnil, make_number (oinserted), visit); | |
d311d28c PE |
4381 | if (! RANGED_INTEGERP (0, insval, ZV - PT)) |
4382 | wrong_type_argument (intern ("inserted-chars"), insval); | |
cac4219c MR |
4383 | if (ochars_modiff == CHARS_MODIFF) |
4384 | /* format_decode didn't modify buffer's characters => move | |
4385 | point back to position before inserted text and leave | |
6420e80c | 4386 | value of inserted alone. */ |
6f2528d8 | 4387 | SET_PT_BOTH (opoint, opoint_byte); |
cac4219c MR |
4388 | else |
4389 | /* format_decode modified buffer's characters => consider | |
6420e80c | 4390 | entire buffer changed and leave point at point-min. */ |
cac4219c | 4391 | inserted = XFASTINT (insval); |
ed8e506f | 4392 | } |
efdc16c9 | 4393 | |
6f2528d8 | 4394 | /* For consistency with format-decode call these now iff inserted > 0 |
6420e80c | 4395 | (martin 2007-06-28). */ |
6f2528d8 MR |
4396 | p = Vafter_insert_file_functions; |
4397 | while (CONSP (p)) | |
4398 | { | |
4399 | if (NILP (replace)) | |
4400 | { | |
4401 | insval = call1 (XCAR (p), make_number (inserted)); | |
4402 | if (!NILP (insval)) | |
4403 | { | |
d311d28c PE |
4404 | if (! RANGED_INTEGERP (0, insval, ZV - PT)) |
4405 | wrong_type_argument (intern ("inserted-chars"), insval); | |
6f2528d8 MR |
4406 | inserted = XFASTINT (insval); |
4407 | } | |
4408 | } | |
4409 | else | |
4410 | { | |
6420e80c AS |
4411 | /* For the rationale of this see the comment on |
4412 | format-decode above. */ | |
d311d28c PE |
4413 | ptrdiff_t opoint = PT; |
4414 | ptrdiff_t opoint_byte = PT_BYTE; | |
4415 | ptrdiff_t oinserted = ZV - BEGV; | |
4416 | EMACS_INT ochars_modiff = CHARS_MODIFF; | |
1f163f28 | 4417 | |
6f2528d8 MR |
4418 | TEMP_SET_PT_BOTH (BEGV, BEGV_BYTE); |
4419 | insval = call1 (XCAR (p), make_number (oinserted)); | |
4420 | if (!NILP (insval)) | |
4421 | { | |
d311d28c PE |
4422 | if (! RANGED_INTEGERP (0, insval, ZV - PT)) |
4423 | wrong_type_argument (intern ("inserted-chars"), insval); | |
cac4219c MR |
4424 | if (ochars_modiff == CHARS_MODIFF) |
4425 | /* after_insert_file_functions didn't modify | |
4426 | buffer's characters => move point back to | |
4427 | position before inserted text and leave value of | |
6420e80c | 4428 | inserted alone. */ |
6f2528d8 | 4429 | SET_PT_BOTH (opoint, opoint_byte); |
cac4219c MR |
4430 | else |
4431 | /* after_insert_file_functions did modify buffer's | |
4432 | characters => consider entire buffer changed and | |
6420e80c | 4433 | leave point at point-min. */ |
cac4219c | 4434 | inserted = XFASTINT (insval); |
6f2528d8 MR |
4435 | } |
4436 | } | |
4437 | ||
4438 | QUIT; | |
4439 | p = XCDR (p); | |
ed8e506f | 4440 | } |
efdc16c9 | 4441 | |
22513e52 | 4442 | if (!empty_undo_list_p) |
6f2528d8 | 4443 | { |
39eb03f1 | 4444 | bset_undo_list (current_buffer, old_undo); |
6420e80c | 4445 | if (CONSP (old_undo) && inserted != old_inserted) |
6f2528d8 | 4446 | { |
6420e80c AS |
4447 | /* Adjust the last undo record for the size change during |
4448 | the format conversion. */ | |
6f2528d8 | 4449 | Lisp_Object tem = XCAR (old_undo); |
6420e80c AS |
4450 | if (CONSP (tem) && INTEGERP (XCAR (tem)) |
4451 | && INTEGERP (XCDR (tem)) | |
4452 | && XFASTINT (XCDR (tem)) == PT + old_inserted) | |
4453 | XSETCDR (tem, make_number (PT + inserted)); | |
6f2528d8 MR |
4454 | } |
4455 | } | |
6f2528d8 | 4456 | else |
1bc99c9c | 4457 | /* If undo_list was Qt before, keep it that way. |
6420e80c | 4458 | Otherwise start with an empty undo_list. */ |
39eb03f1 | 4459 | bset_undo_list (current_buffer, EQ (old_undo, Qt) ? Qt : Qnil); |
efdc16c9 | 4460 | |
f839df0c | 4461 | unbind_to (count1, Qnil); |
0d420e88 BG |
4462 | } |
4463 | ||
f8569325 | 4464 | if (!NILP (visit) |
43aac990 | 4465 | && current_buffer->modtime.tv_nsec == NONEXISTENT_MODTIME_NSECS) |
f8569325 DL |
4466 | { |
4467 | /* If visiting nonexistent file, return nil. */ | |
a9757f6a | 4468 | report_file_errno ("Opening input file", orig_filename, save_errno); |
d6a3cc15 RS |
4469 | } |
4470 | ||
addccbd0 EZ |
4471 | /* We made a lot of deletions and insertions above, so invalidate |
4472 | the newline cache for the entire region of the inserted | |
4473 | characters. */ | |
4474 | if (current_buffer->newline_cache) | |
4475 | invalidate_region_cache (current_buffer, | |
4476 | current_buffer->newline_cache, | |
4477 | PT - BEG, Z - PT - inserted); | |
4478 | ||
1b978129 GM |
4479 | if (read_quit) |
4480 | Fsignal (Qquit, Qnil); | |
4481 | ||
2ef88fd4 | 4482 | /* Retval needs to be dealt with in all cases consistently. */ |
a1d2b64a | 4483 | if (NILP (val)) |
e07469fa | 4484 | val = list2 (orig_filename, make_number (inserted)); |
a1d2b64a RS |
4485 | |
4486 | RETURN_UNGCPRO (unbind_to (count, val)); | |
570d7624 | 4487 | } |
7fded690 | 4488 | \f |
f57e2426 | 4489 | static Lisp_Object build_annotations (Lisp_Object, Lisp_Object); |
d6a3cc15 | 4490 | |
27e498e6 | 4491 | static void |
971de7fb | 4492 | build_annotations_unwind (Lisp_Object arg) |
6fc6f94b | 4493 | { |
67fbc0cb | 4494 | Vwrite_region_annotation_buffers = arg; |
6fc6f94b RS |
4495 | } |
4496 | ||
7c82a4a9 SM |
4497 | /* Decide the coding-system to encode the data with. */ |
4498 | ||
9dbda100 GM |
4499 | DEFUN ("choose-write-coding-system", Fchoose_write_coding_system, |
4500 | Schoose_write_coding_system, 3, 6, 0, | |
4501 | doc: /* Choose the coding system for writing a file. | |
4502 | Arguments are as for `write-region'. | |
4503 | This function is for internal use only. It may prompt the user. */ ) | |
4504 | (Lisp_Object start, Lisp_Object end, Lisp_Object filename, | |
4505 | Lisp_Object append, Lisp_Object visit, Lisp_Object lockname) | |
7c82a4a9 SM |
4506 | { |
4507 | Lisp_Object val; | |
75421805 | 4508 | Lisp_Object eol_parent = Qnil; |
7c82a4a9 | 4509 | |
9dbda100 GM |
4510 | /* Mimic write-region behavior. */ |
4511 | if (NILP (start)) | |
4512 | { | |
4513 | XSETFASTINT (start, BEGV); | |
4514 | XSETFASTINT (end, ZV); | |
4515 | } | |
4516 | ||
6b61353c | 4517 | if (auto_saving |
4b4deea2 TT |
4518 | && NILP (Fstring_equal (BVAR (current_buffer, filename), |
4519 | BVAR (current_buffer, auto_save_file_name)))) | |
75421805 KH |
4520 | { |
4521 | val = Qutf_8_emacs; | |
4522 | eol_parent = Qunix; | |
4523 | } | |
7c82a4a9 | 4524 | else if (!NILP (Vcoding_system_for_write)) |
42b01e1e KH |
4525 | { |
4526 | val = Vcoding_system_for_write; | |
4527 | if (coding_system_require_warning | |
4528 | && !NILP (Ffboundp (Vselect_safe_coding_system_function))) | |
4529 | /* Confirm that VAL can surely encode the current region. */ | |
4530 | val = call5 (Vselect_safe_coding_system_function, | |
6c6f1994 | 4531 | start, end, list2 (Qt, val), |
42b01e1e KH |
4532 | Qnil, filename); |
4533 | } | |
7c82a4a9 SM |
4534 | else |
4535 | { | |
4536 | /* If the variable `buffer-file-coding-system' is set locally, | |
4537 | it means that the file was read with some kind of code | |
4538 | conversion or the variable is explicitly set by users. We | |
4539 | had better write it out with the same coding system even if | |
4540 | `enable-multibyte-characters' is nil. | |
4541 | ||
4542 | If it is not set locally, we anyway have to convert EOL | |
4543 | format if the default value of `buffer-file-coding-system' | |
4544 | tells that it is not Unix-like (LF only) format. */ | |
f75d7a91 PE |
4545 | bool using_default_coding = 0; |
4546 | bool force_raw_text = 0; | |
7c82a4a9 | 4547 | |
4b4deea2 | 4548 | val = BVAR (current_buffer, buffer_file_coding_system); |
7c82a4a9 SM |
4549 | if (NILP (val) |
4550 | || NILP (Flocal_variable_p (Qbuffer_file_coding_system, Qnil))) | |
4551 | { | |
4552 | val = Qnil; | |
4b4deea2 | 4553 | if (NILP (BVAR (current_buffer, enable_multibyte_characters))) |
7c82a4a9 SM |
4554 | force_raw_text = 1; |
4555 | } | |
efdc16c9 | 4556 | |
7c82a4a9 SM |
4557 | if (NILP (val)) |
4558 | { | |
4559 | /* Check file-coding-system-alist. */ | |
4560 | Lisp_Object args[7], coding_systems; | |
4561 | ||
4562 | args[0] = Qwrite_region; args[1] = start; args[2] = end; | |
4563 | args[3] = filename; args[4] = append; args[5] = visit; | |
4564 | args[6] = lockname; | |
4565 | coding_systems = Ffind_operation_coding_system (7, args); | |
4566 | if (CONSP (coding_systems) && !NILP (XCDR (coding_systems))) | |
4567 | val = XCDR (coding_systems); | |
4568 | } | |
4569 | ||
c934586d | 4570 | if (NILP (val)) |
7c82a4a9 SM |
4571 | { |
4572 | /* If we still have not decided a coding system, use the | |
4573 | default value of buffer-file-coding-system. */ | |
4b4deea2 | 4574 | val = BVAR (current_buffer, buffer_file_coding_system); |
7c82a4a9 SM |
4575 | using_default_coding = 1; |
4576 | } | |
efdc16c9 | 4577 | |
db327c7e KH |
4578 | if (! NILP (val) && ! force_raw_text) |
4579 | { | |
4580 | Lisp_Object spec, attrs; | |
4581 | ||
4582 | CHECK_CODING_SYSTEM_GET_SPEC (val, spec); | |
4583 | attrs = AREF (spec, 0); | |
4584 | if (EQ (CODING_ATTR_TYPE (attrs), Qraw_text)) | |
4585 | force_raw_text = 1; | |
4586 | } | |
4587 | ||
7c82a4a9 SM |
4588 | if (!force_raw_text |
4589 | && !NILP (Ffboundp (Vselect_safe_coding_system_function))) | |
4590 | /* Confirm that VAL can surely encode the current region. */ | |
905a4276 PJ |
4591 | val = call5 (Vselect_safe_coding_system_function, |
4592 | start, end, val, Qnil, filename); | |
7c82a4a9 | 4593 | |
db327c7e KH |
4594 | /* If the decided coding-system doesn't specify end-of-line |
4595 | format, we use that of | |
4596 | `default-buffer-file-coding-system'. */ | |
c934586d | 4597 | if (! using_default_coding |
4b4deea2 | 4598 | && ! NILP (BVAR (&buffer_defaults, buffer_file_coding_system))) |
db327c7e | 4599 | val = (coding_inherit_eol_type |
4b4deea2 | 4600 | (val, BVAR (&buffer_defaults, buffer_file_coding_system))); |
7c82a4a9 | 4601 | |
db327c7e KH |
4602 | /* If we decide not to encode text, use `raw-text' or one of its |
4603 | subsidiaries. */ | |
7c82a4a9 | 4604 | if (force_raw_text) |
db327c7e | 4605 | val = raw_text_coding_system (val); |
7c82a4a9 SM |
4606 | } |
4607 | ||
75421805 | 4608 | val = coding_inherit_eol_type (val, eol_parent); |
c934586d | 4609 | return val; |
7c82a4a9 SM |
4610 | } |
4611 | ||
a7ca3326 | 4612 | DEFUN ("write-region", Fwrite_region, Swrite_region, 3, 7, |
8c1a1077 PJ |
4613 | "r\nFWrite region to file: \ni\ni\ni\np", |
4614 | doc: /* Write current region into specified file. | |
c2efea25 RS |
4615 | When called from a program, requires three arguments: |
4616 | START, END and FILENAME. START and END are normally buffer positions | |
4617 | specifying the part of the buffer to write. | |
4618 | If START is nil, that means to use the entire buffer contents. | |
4619 | If START is a string, then output that string to the file | |
4620 | instead of any buffer contents; END is ignored. | |
4621 | ||
8c1a1077 | 4622 | Optional fourth argument APPEND if non-nil means |
b3fbb395 | 4623 | append to existing file contents (if any). If it is a number, |
8c1a1077 | 4624 | seek to that offset in the file before writing. |
36e50520 | 4625 | Optional fifth argument VISIT, if t or a string, means |
8c1a1077 PJ |
4626 | set the last-save-file-modtime of buffer to this file's modtime |
4627 | and mark buffer not modified. | |
4628 | If VISIT is a string, it is a second file name; | |
4629 | the output goes to FILENAME, but the buffer is marked as visiting VISIT. | |
4630 | VISIT is also the file name to lock and unlock for clash detection. | |
4631 | If VISIT is neither t nor nil nor a string, | |
5f4e6aa9 | 4632 | that means do not display the \"Wrote file\" message. |
8c1a1077 PJ |
4633 | The optional sixth arg LOCKNAME, if non-nil, specifies the name to |
4634 | use for locking and unlocking, overriding FILENAME and VISIT. | |
4635 | The optional seventh arg MUSTBENEW, if non-nil, insists on a check | |
4636 | for an existing file with the same name. If MUSTBENEW is `excl', | |
4637 | that means to get an error if the file already exists; never overwrite. | |
4638 | If MUSTBENEW is neither nil nor `excl', that means ask for | |
4639 | confirmation before overwriting, but do go ahead and overwrite the file | |
4640 | if the user confirms. | |
8c1a1077 PJ |
4641 | |
4642 | This does code conversion according to the value of | |
4643 | `coding-system-for-write', `buffer-file-coding-system', or | |
4644 | `file-coding-system-alist', and sets the variable | |
aacd8ba1 GM |
4645 | `last-coding-system-used' to the coding system actually used. |
4646 | ||
4647 | This calls `write-region-annotate-functions' at the start, and | |
4648 | `write-region-post-annotation-function' at the end. */) | |
94fcd171 PE |
4649 | (Lisp_Object start, Lisp_Object end, Lisp_Object filename, Lisp_Object append, |
4650 | Lisp_Object visit, Lisp_Object lockname, Lisp_Object mustbenew) | |
4651 | { | |
4652 | return write_region (start, end, filename, append, visit, lockname, mustbenew, | |
4653 | -1); | |
4654 | } | |
4655 | ||
4656 | /* Like Fwrite_region, except that if DESC is nonnegative, it is a file | |
4657 | descriptor for FILENAME, so do not open or close FILENAME. */ | |
4658 | ||
4659 | Lisp_Object | |
4660 | write_region (Lisp_Object start, Lisp_Object end, Lisp_Object filename, | |
4661 | Lisp_Object append, Lisp_Object visit, Lisp_Object lockname, | |
4662 | Lisp_Object mustbenew, int desc) | |
570d7624 | 4663 | { |
3a955a1f PE |
4664 | int open_flags; |
4665 | int mode; | |
4666 | off_t offset IF_LINT (= 0); | |
94fcd171 | 4667 | bool open_and_close_file = desc < 0; |
f75d7a91 | 4668 | bool ok; |
6bbd7a29 | 4669 | int save_errno = 0; |
5976c3fe | 4670 | const char *fn; |
570d7624 | 4671 | struct stat st; |
43aac990 | 4672 | struct timespec modtime; |
d311d28c | 4673 | ptrdiff_t count = SPECPDL_INDEX (); |
94fcd171 | 4674 | ptrdiff_t count1 IF_LINT (= 0); |
3eac9910 | 4675 | Lisp_Object handler; |
4ad827c5 | 4676 | Lisp_Object visit_file; |
65b7d3e7 | 4677 | Lisp_Object annotations; |
b1d1b865 | 4678 | Lisp_Object encoded_filename; |
f75d7a91 PE |
4679 | bool visiting = (EQ (visit, Qt) || STRINGP (visit)); |
4680 | bool quietly = !NILP (visit); | |
94fcd171 | 4681 | bool file_locked = 0; |
7204a979 | 4682 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4, gcpro5; |
6fc6f94b | 4683 | struct buffer *given_buffer; |
6fdaa9a0 | 4684 | struct coding_system coding; |
570d7624 | 4685 | |
d3a67486 | 4686 | if (current_buffer->base_buffer && visiting) |
95385625 RS |
4687 | error ("Cannot do file visiting in an indirect buffer"); |
4688 | ||
561cb8e1 | 4689 | if (!NILP (start) && !STRINGP (start)) |
570d7624 JB |
4690 | validate_region (&start, &end); |
4691 | ||
95c1c901 | 4692 | visit_file = Qnil; |
59fac292 | 4693 | GCPRO5 (start, filename, visit, visit_file, lockname); |
b56567b5 | 4694 | |
570d7624 | 4695 | filename = Fexpand_file_name (filename, Qnil); |
de1d0127 | 4696 | |
236a12f2 | 4697 | if (!NILP (mustbenew) && !EQ (mustbenew, Qexcl)) |
b8b29dc9 | 4698 | barf_or_query_if_file_exists (filename, "overwrite", 1, 0, 1); |
de1d0127 | 4699 | |
561cb8e1 | 4700 | if (STRINGP (visit)) |
e5176bae | 4701 | visit_file = Fexpand_file_name (visit, Qnil); |
4ad827c5 RS |
4702 | else |
4703 | visit_file = filename; | |
4704 | ||
7204a979 RS |
4705 | if (NILP (lockname)) |
4706 | lockname = visit_file; | |
4707 | ||
65b7d3e7 RS |
4708 | annotations = Qnil; |
4709 | ||
32f4334d RS |
4710 | /* If the file name has special constructs in it, |
4711 | call the corresponding file handler. */ | |
49307295 | 4712 | handler = Ffind_file_name_handler (filename, Qwrite_region); |
b56ad927 | 4713 | /* If FILENAME has no handler, see if VISIT has one. */ |
93c30b5f | 4714 | if (NILP (handler) && STRINGP (visit)) |
199607e4 | 4715 | handler = Ffind_file_name_handler (visit, Qwrite_region); |
3eac9910 | 4716 | |
32f4334d RS |
4717 | if (!NILP (handler)) |
4718 | { | |
32f4334d | 4719 | Lisp_Object val; |
51cf6d37 RS |
4720 | val = call6 (handler, Qwrite_region, start, end, |
4721 | filename, append, visit); | |
32f4334d | 4722 | |
d6a3cc15 | 4723 | if (visiting) |
32f4334d | 4724 | { |
95385625 | 4725 | SAVE_MODIFF = MODIFF; |
4b4deea2 | 4726 | XSETFASTINT (BVAR (current_buffer, save_length), Z - BEG); |
39eb03f1 | 4727 | bset_filename (current_buffer, visit_file); |
32f4334d | 4728 | } |
09121adc | 4729 | UNGCPRO; |
32f4334d RS |
4730 | return val; |
4731 | } | |
4732 | ||
4a38de71 KH |
4733 | record_unwind_protect (save_restriction_restore, save_restriction_save ()); |
4734 | ||
561cb8e1 RS |
4735 | /* Special kludge to simplify auto-saving. */ |
4736 | if (NILP (start)) | |
4737 | { | |
6b3d752c SM |
4738 | /* Do it later, so write-region-annotate-function can work differently |
4739 | if we save "the buffer" vs "a region". | |
4740 | This is useful in tar-mode. --Stef | |
2acfd7ae | 4741 | XSETFASTINT (start, BEG); |
6b3d752c | 4742 | XSETFASTINT (end, Z); */ |
4a38de71 | 4743 | Fwiden (); |
561cb8e1 RS |
4744 | } |
4745 | ||
67fbc0cb CY |
4746 | record_unwind_protect (build_annotations_unwind, |
4747 | Vwrite_region_annotation_buffers); | |
6c6f1994 | 4748 | Vwrite_region_annotation_buffers = list1 (Fcurrent_buffer ()); |
6fc6f94b RS |
4749 | |
4750 | given_buffer = current_buffer; | |
bf3428a1 RS |
4751 | |
4752 | if (!STRINGP (start)) | |
236a12f2 | 4753 | { |
bf3428a1 RS |
4754 | annotations = build_annotations (start, end); |
4755 | ||
4756 | if (current_buffer != given_buffer) | |
4757 | { | |
4758 | XSETFASTINT (start, BEGV); | |
4759 | XSETFASTINT (end, ZV); | |
4760 | } | |
236a12f2 SM |
4761 | } |
4762 | ||
6b3d752c SM |
4763 | if (NILP (start)) |
4764 | { | |
4765 | XSETFASTINT (start, BEGV); | |
4766 | XSETFASTINT (end, ZV); | |
4767 | } | |
4768 | ||
236a12f2 SM |
4769 | UNGCPRO; |
4770 | ||
4771 | GCPRO5 (start, filename, annotations, visit_file, lockname); | |
4772 | ||
59fac292 SM |
4773 | /* Decide the coding-system to encode the data with. |
4774 | We used to make this choice before calling build_annotations, but that | |
4775 | leads to problems when a write-annotate-function takes care of | |
4776 | unsavable chars (as was the case with X-Symbol). */ | |
538f3845 | 4777 | Vlast_coding_system_used = |
9dbda100 | 4778 | Fchoose_write_coding_system (start, end, filename, |
538f3845 | 4779 | append, visit, lockname); |
9dbda100 GM |
4780 | |
4781 | setup_coding_system (Vlast_coding_system_used, &coding); | |
4782 | ||
4783 | if (!STRINGP (start) && !NILP (BVAR (current_buffer, selective_display))) | |
4784 | coding.mode |= CODING_MODE_SELECTIVE_DISPLAY; | |
d6a3cc15 | 4785 | |
570d7624 | 4786 | #ifdef CLASH_DETECTION |
94fcd171 PE |
4787 | if (open_and_close_file && !auto_saving) |
4788 | { | |
4789 | lock_file (lockname); | |
4790 | file_locked = 1; | |
4791 | } | |
570d7624 JB |
4792 | #endif /* CLASH_DETECTION */ |
4793 | ||
b1d1b865 | 4794 | encoded_filename = ENCODE_FILE (filename); |
5976c3fe | 4795 | fn = SSDATA (encoded_filename); |
3a955a1f PE |
4796 | open_flags = O_WRONLY | O_BINARY | O_CREAT; |
4797 | open_flags |= EQ (mustbenew, Qexcl) ? O_EXCL : !NILP (append) ? 0 : O_TRUNC; | |
4798 | if (NUMBERP (append)) | |
4799 | offset = file_offset (append); | |
4800 | else if (!NILP (append)) | |
4801 | open_flags |= O_APPEND; | |
5e570b75 | 4802 | #ifdef DOS_NT |
3a955a1f PE |
4803 | mode = S_IREAD | S_IWRITE; |
4804 | #else | |
4805 | mode = auto_saving ? auto_save_mode_bits : 0666; | |
4806 | #endif | |
4807 | ||
94fcd171 | 4808 | if (open_and_close_file) |
570d7624 | 4809 | { |
94fcd171 PE |
4810 | desc = emacs_open (fn, open_flags, mode); |
4811 | if (desc < 0) | |
4812 | { | |
4813 | int open_errno = errno; | |
570d7624 | 4814 | #ifdef CLASH_DETECTION |
94fcd171 PE |
4815 | if (file_locked) |
4816 | unlock_file (lockname); | |
570d7624 | 4817 | #endif /* CLASH_DETECTION */ |
94fcd171 PE |
4818 | UNGCPRO; |
4819 | report_file_errno ("Opening output file", filename, open_errno); | |
4820 | } | |
570d7624 | 4821 | |
94fcd171 PE |
4822 | count1 = SPECPDL_INDEX (); |
4823 | record_unwind_protect_int (close_file_unwind, desc); | |
4824 | } | |
570d7624 | 4825 | |
3a955a1f | 4826 | if (NUMBERP (append)) |
43fb7d9a | 4827 | { |
3a955a1f | 4828 | off_t ret = lseek (desc, offset, SEEK_SET); |
43fb7d9a DL |
4829 | if (ret < 0) |
4830 | { | |
a773ed9a | 4831 | int lseek_errno = errno; |
570d7624 | 4832 | #ifdef CLASH_DETECTION |
94fcd171 PE |
4833 | if (file_locked) |
4834 | unlock_file (lockname); | |
570d7624 | 4835 | #endif /* CLASH_DETECTION */ |
43fb7d9a | 4836 | UNGCPRO; |
a9757f6a | 4837 | report_file_errno ("Lseek error", filename, lseek_errno); |
43fb7d9a DL |
4838 | } |
4839 | } | |
efdc16c9 | 4840 | |
43fb7d9a | 4841 | UNGCPRO; |
570d7624 | 4842 | |
570d7624 JB |
4843 | immediate_quit = 1; |
4844 | ||
561cb8e1 | 4845 | if (STRINGP (start)) |
f75d7a91 | 4846 | ok = a_write (desc, start, 0, SCHARS (start), &annotations, &coding); |
570d7624 | 4847 | else if (XINT (start) != XINT (end)) |
f75d7a91 PE |
4848 | ok = a_write (desc, Qnil, XINT (start), XINT (end) - XINT (start), |
4849 | &annotations, &coding); | |
69f6e679 RS |
4850 | else |
4851 | { | |
f75d7a91 | 4852 | /* If file was empty, still need to write the annotations. */ |
c8a6d68a | 4853 | coding.mode |= CODING_MODE_LAST_BLOCK; |
f75d7a91 | 4854 | ok = a_write (desc, Qnil, XINT (end), 0, &annotations, &coding); |
6fdaa9a0 | 4855 | } |
f75d7a91 | 4856 | save_errno = errno; |
6fdaa9a0 | 4857 | |
f75d7a91 PE |
4858 | if (ok && CODING_REQUIRE_FLUSHING (&coding) |
4859 | && !(coding.mode & CODING_MODE_LAST_BLOCK)) | |
6fdaa9a0 KH |
4860 | { |
4861 | /* We have to flush out a data. */ | |
c8a6d68a | 4862 | coding.mode |= CODING_MODE_LAST_BLOCK; |
f75d7a91 | 4863 | ok = e_write (desc, Qnil, 1, 1, &coding); |
69f6e679 | 4864 | save_errno = errno; |
570d7624 JB |
4865 | } |
4866 | ||
4867 | immediate_quit = 0; | |
4868 | ||
94fcd171 PE |
4869 | /* fsync is not crucial for temporary files. Nor for auto-save |
4870 | files, since they might lose some work anyway. */ | |
4871 | if (open_and_close_file && !auto_saving && !write_region_inhibit_fsync) | |
cb33c142 | 4872 | { |
cbee2131 PE |
4873 | /* Transfer data and metadata to disk, retrying if interrupted. |
4874 | fsync can report a write failure here, e.g., due to disk full | |
4875 | under NFS. But ignore EINVAL, which means fsync is not | |
4876 | supported on this file. */ | |
47d7532e PE |
4877 | while (fsync (desc) != 0) |
4878 | if (errno != EINTR) | |
4879 | { | |
4880 | if (errno != EINVAL) | |
4881 | ok = 0, save_errno = errno; | |
4882 | break; | |
4883 | } | |
cb33c142 | 4884 | } |
570d7624 | 4885 | |
43aac990 | 4886 | modtime = invalid_timespec (); |
d6453ce4 PE |
4887 | if (visiting) |
4888 | { | |
4889 | if (fstat (desc, &st) == 0) | |
4890 | modtime = get_stat_mtime (&st); | |
4891 | else | |
4892 | ok = 0, save_errno = errno; | |
4893 | } | |
4894 | ||
94fcd171 PE |
4895 | if (open_and_close_file) |
4896 | { | |
4897 | /* NFS can report a write failure now. */ | |
4898 | if (emacs_close (desc) < 0) | |
4899 | ok = 0, save_errno = errno; | |
570d7624 | 4900 | |
94fcd171 PE |
4901 | /* Discard the unwind protect for close_file_unwind. */ |
4902 | specpdl_ptr = specpdl + count1; | |
4903 | } | |
67fbc0cb | 4904 | |
9fe43ff6 PE |
4905 | /* Some file systems have a bug where st_mtime is not updated |
4906 | properly after a write. For example, CIFS might not see the | |
4907 | st_mtime change until after the file is opened again. | |
4908 | ||
4909 | Attempt to detect this file system bug, and update MODTIME to the | |
4910 | newer st_mtime if the bug appears to be present. This introduces | |
4911 | a race condition, so to avoid most instances of the race condition | |
4912 | on non-buggy file systems, skip this check if the most recently | |
4913 | encountered non-buggy file system was the current file system. | |
4914 | ||
4915 | A race condition can occur if some other process modifies the | |
4916 | file between the fstat above and the fstat below, but the race is | |
4917 | unlikely and a similar race between the last write and the fstat | |
4918 | above cannot possibly be closed anyway. */ | |
4919 | ||
43aac990 | 4920 | if (timespec_valid_p (modtime) |
9fe43ff6 PE |
4921 | && ! (valid_timestamp_file_system && st.st_dev == timestamp_file_system)) |
4922 | { | |
21cd50b8 | 4923 | int desc1 = emacs_open (fn, O_WRONLY | O_BINARY, 0); |
908589fd | 4924 | if (desc1 >= 0) |
9fe43ff6 PE |
4925 | { |
4926 | struct stat st1; | |
4927 | if (fstat (desc1, &st1) == 0 | |
4928 | && st.st_dev == st1.st_dev && st.st_ino == st1.st_ino) | |
4929 | { | |
8ea41ea9 PE |
4930 | /* Use the heuristic if it appears to be valid. With neither |
4931 | O_EXCL nor O_TRUNC, if Emacs happened to write nothing to the | |
4932 | file, the time stamp won't change. Also, some non-POSIX | |
4933 | systems don't update an empty file's time stamp when | |
4934 | truncating it. Finally, file systems with 100 ns or worse | |
4935 | resolution sometimes seem to have bugs: on a system with ns | |
4936 | resolution, checking ns % 100 incorrectly avoids the heuristic | |
4937 | 1% of the time, but the problem should be temporary as we will | |
4938 | try again on the next time stamp. */ | |
4939 | bool use_heuristic | |
4940 | = ((open_flags & (O_EXCL | O_TRUNC)) != 0 | |
4941 | && st.st_size != 0 | |
43aac990 | 4942 | && modtime.tv_nsec % 100 != 0); |
8ea41ea9 | 4943 | |
43aac990 | 4944 | struct timespec modtime1 = get_stat_mtime (&st1); |
8ea41ea9 | 4945 | if (use_heuristic |
43aac990 | 4946 | && timespec_cmp (modtime, modtime1) == 0 |
9fe43ff6 PE |
4947 | && st.st_size == st1.st_size) |
4948 | { | |
4949 | timestamp_file_system = st.st_dev; | |
4950 | valid_timestamp_file_system = 1; | |
4951 | } | |
4952 | else | |
4953 | { | |
4954 | st.st_size = st1.st_size; | |
4955 | modtime = modtime1; | |
4956 | } | |
4957 | } | |
4958 | emacs_close (desc1); | |
4959 | } | |
4960 | } | |
4961 | ||
67fbc0cb | 4962 | /* Call write-region-post-annotation-function. */ |
294fa707 | 4963 | while (CONSP (Vwrite_region_annotation_buffers)) |
67fbc0cb CY |
4964 | { |
4965 | Lisp_Object buf = XCAR (Vwrite_region_annotation_buffers); | |
4966 | if (!NILP (Fbuffer_live_p (buf))) | |
4967 | { | |
4968 | Fset_buffer (buf); | |
4969 | if (FUNCTIONP (Vwrite_region_post_annotation_function)) | |
4970 | call0 (Vwrite_region_post_annotation_function); | |
4971 | } | |
4972 | Vwrite_region_annotation_buffers | |
4973 | = XCDR (Vwrite_region_annotation_buffers); | |
4974 | } | |
4975 | ||
4976 | unbind_to (count, Qnil); | |
570d7624 JB |
4977 | |
4978 | #ifdef CLASH_DETECTION | |
94fcd171 | 4979 | if (file_locked) |
7204a979 | 4980 | unlock_file (lockname); |
570d7624 JB |
4981 | #endif /* CLASH_DETECTION */ |
4982 | ||
4983 | /* Do this before reporting IO error | |
4984 | to avoid a "file has changed on disk" warning on | |
4985 | next attempt to save. */ | |
43aac990 | 4986 | if (timespec_valid_p (modtime)) |
58b963f7 | 4987 | { |
d6453ce4 | 4988 | current_buffer->modtime = modtime; |
58b963f7 SM |
4989 | current_buffer->modtime_size = st.st_size; |
4990 | } | |
570d7624 | 4991 | |
f75d7a91 | 4992 | if (! ok) |
4e604a5d | 4993 | report_file_errno ("Write error", filename, save_errno); |
570d7624 | 4994 | |
d6a3cc15 | 4995 | if (visiting) |
570d7624 | 4996 | { |
95385625 | 4997 | SAVE_MODIFF = MODIFF; |
4b4deea2 | 4998 | XSETFASTINT (BVAR (current_buffer, save_length), Z - BEG); |
39eb03f1 | 4999 | bset_filename (current_buffer, visit_file); |
2ec9db5d | 5000 | update_mode_lines = 14; |
570d7624 | 5001 | } |
d6a3cc15 | 5002 | else if (quietly) |
6b61353c KH |
5003 | { |
5004 | if (auto_saving | |
4b4deea2 TT |
5005 | && ! NILP (Fstring_equal (BVAR (current_buffer, filename), |
5006 | BVAR (current_buffer, auto_save_file_name)))) | |
6b61353c KH |
5007 | SAVE_MODIFF = MODIFF; |
5008 | ||
5009 | return Qnil; | |
5010 | } | |
570d7624 JB |
5011 | |
5012 | if (!auto_saving) | |
3908c576 | 5013 | message_with_string ((NUMBERP (append) |
0c328a0e RS |
5014 | ? "Updated %s" |
5015 | : ! NILP (append) | |
5016 | ? "Added to %s" | |
5017 | : "Wrote %s"), | |
5018 | visit_file, 1); | |
570d7624 JB |
5019 | |
5020 | return Qnil; | |
5021 | } | |
ec7adf26 | 5022 | \f |
d6a3cc15 | 5023 | DEFUN ("car-less-than-car", Fcar_less_than_car, Scar_less_than_car, 2, 2, 0, |
8c1a1077 | 5024 | doc: /* Return t if (car A) is numerically less than (car B). */) |
5842a27b | 5025 | (Lisp_Object a, Lisp_Object b) |
d6a3cc15 | 5026 | { |
ebb99847 BR |
5027 | Lisp_Object args[2] = { Fcar (a), Fcar (b), }; |
5028 | return Flss (2, args); | |
d6a3cc15 RS |
5029 | } |
5030 | ||
5031 | /* Build the complete list of annotations appropriate for writing out | |
5032 | the text between START and END, by calling all the functions in | |
6fc6f94b RS |
5033 | write-region-annotate-functions and merging the lists they return. |
5034 | If one of these functions switches to a different buffer, we assume | |
5035 | that buffer contains altered text. Therefore, the caller must | |
5036 | make sure to restore the current buffer in all cases, | |
5037 | as save-excursion would do. */ | |
d6a3cc15 RS |
5038 | |
5039 | static Lisp_Object | |
971de7fb | 5040 | build_annotations (Lisp_Object start, Lisp_Object end) |
d6a3cc15 RS |
5041 | { |
5042 | Lisp_Object annotations; | |
5043 | Lisp_Object p, res; | |
5044 | struct gcpro gcpro1, gcpro2; | |
0a20b684 | 5045 | Lisp_Object original_buffer; |
f75d7a91 PE |
5046 | int i; |
5047 | bool used_global = 0; | |
0a20b684 RS |
5048 | |
5049 | XSETBUFFER (original_buffer, current_buffer); | |
d6a3cc15 RS |
5050 | |
5051 | annotations = Qnil; | |
5052 | p = Vwrite_region_annotate_functions; | |
5053 | GCPRO2 (annotations, p); | |
28c3eb5a | 5054 | while (CONSP (p)) |
d6a3cc15 | 5055 | { |
6fc6f94b | 5056 | struct buffer *given_buffer = current_buffer; |
bd235610 SM |
5057 | if (EQ (Qt, XCAR (p)) && !used_global) |
5058 | { /* Use the global value of the hook. */ | |
5059 | Lisp_Object arg[2]; | |
5060 | used_global = 1; | |
5061 | arg[0] = Fdefault_value (Qwrite_region_annotate_functions); | |
5062 | arg[1] = XCDR (p); | |
5063 | p = Fappend (2, arg); | |
5064 | continue; | |
5065 | } | |
6fc6f94b | 5066 | Vwrite_region_annotations_so_far = annotations; |
28c3eb5a | 5067 | res = call2 (XCAR (p), start, end); |
6fc6f94b RS |
5068 | /* If the function makes a different buffer current, |
5069 | assume that means this buffer contains altered text to be output. | |
5070 | Reset START and END from the buffer bounds | |
5071 | and discard all previous annotations because they should have | |
5072 | been dealt with by this function. */ | |
5073 | if (current_buffer != given_buffer) | |
5074 | { | |
67fbc0cb CY |
5075 | Vwrite_region_annotation_buffers |
5076 | = Fcons (Fcurrent_buffer (), | |
5077 | Vwrite_region_annotation_buffers); | |
3cf29f61 RS |
5078 | XSETFASTINT (start, BEGV); |
5079 | XSETFASTINT (end, ZV); | |
6fc6f94b RS |
5080 | annotations = Qnil; |
5081 | } | |
d6a3cc15 RS |
5082 | Flength (res); /* Check basic validity of return value */ |
5083 | annotations = merge (annotations, res, Qcar_less_than_car); | |
28c3eb5a | 5084 | p = XCDR (p); |
d6a3cc15 | 5085 | } |
0d420e88 BG |
5086 | |
5087 | /* Now do the same for annotation functions implied by the file-format */ | |
4b4deea2 TT |
5088 | if (auto_saving && (!EQ (BVAR (current_buffer, auto_save_file_format), Qt))) |
5089 | p = BVAR (current_buffer, auto_save_file_format); | |
0d420e88 | 5090 | else |
4b4deea2 | 5091 | p = BVAR (current_buffer, file_format); |
28c3eb5a | 5092 | for (i = 0; CONSP (p); p = XCDR (p), ++i) |
0d420e88 BG |
5093 | { |
5094 | struct buffer *given_buffer = current_buffer; | |
efdc16c9 | 5095 | |
0d420e88 | 5096 | Vwrite_region_annotations_so_far = annotations; |
532ed661 GM |
5097 | |
5098 | /* Value is either a list of annotations or nil if the function | |
5099 | has written annotations to a temporary buffer, which is now | |
5100 | current. */ | |
28c3eb5a | 5101 | res = call5 (Qformat_annotate_function, XCAR (p), start, end, |
532ed661 | 5102 | original_buffer, make_number (i)); |
0d420e88 BG |
5103 | if (current_buffer != given_buffer) |
5104 | { | |
3cf29f61 RS |
5105 | XSETFASTINT (start, BEGV); |
5106 | XSETFASTINT (end, ZV); | |
0d420e88 BG |
5107 | annotations = Qnil; |
5108 | } | |
efdc16c9 | 5109 | |
532ed661 GM |
5110 | if (CONSP (res)) |
5111 | annotations = merge (annotations, res, Qcar_less_than_car); | |
0d420e88 | 5112 | } |
6fdaa9a0 | 5113 | |
236a12f2 SM |
5114 | UNGCPRO; |
5115 | return annotations; | |
5116 | } | |
5117 | ||
ec7adf26 | 5118 | \f |
ce51c54c KH |
5119 | /* Write to descriptor DESC the NCHARS chars starting at POS of STRING. |
5120 | If STRING is nil, POS is the character position in the current buffer. | |
d6a3cc15 | 5121 | Intersperse with them the annotations from *ANNOT |
ce51c54c | 5122 | which fall within the range of POS to POS + NCHARS, |
d6a3cc15 RS |
5123 | each at its appropriate position. |
5124 | ||
ec7adf26 RS |
5125 | We modify *ANNOT by discarding elements as we use them up. |
5126 | ||
f75d7a91 | 5127 | Return true if successful. */ |
d6a3cc15 | 5128 | |
f75d7a91 | 5129 | static bool |
d311d28c | 5130 | a_write (int desc, Lisp_Object string, ptrdiff_t pos, |
f75d7a91 | 5131 | ptrdiff_t nchars, Lisp_Object *annot, |
8a2cbd72 | 5132 | struct coding_system *coding) |
d6a3cc15 RS |
5133 | { |
5134 | Lisp_Object tem; | |
d311d28c PE |
5135 | ptrdiff_t nextpos; |
5136 | ptrdiff_t lastpos = pos + nchars; | |
d6a3cc15 | 5137 | |
eb15aa18 | 5138 | while (NILP (*annot) || CONSP (*annot)) |
d6a3cc15 RS |
5139 | { |
5140 | tem = Fcar_safe (Fcar (*annot)); | |
ce51c54c | 5141 | nextpos = pos - 1; |
ec7adf26 | 5142 | if (INTEGERP (tem)) |
ce51c54c | 5143 | nextpos = XFASTINT (tem); |
ec7adf26 RS |
5144 | |
5145 | /* If there are no more annotations in this range, | |
5146 | output the rest of the range all at once. */ | |
ce51c54c KH |
5147 | if (! (nextpos >= pos && nextpos <= lastpos)) |
5148 | return e_write (desc, string, pos, lastpos, coding); | |
ec7adf26 RS |
5149 | |
5150 | /* Output buffer text up to the next annotation's position. */ | |
ce51c54c | 5151 | if (nextpos > pos) |
d6a3cc15 | 5152 | { |
f75d7a91 PE |
5153 | if (!e_write (desc, string, pos, nextpos, coding)) |
5154 | return 0; | |
ce51c54c | 5155 | pos = nextpos; |
d6a3cc15 | 5156 | } |
ec7adf26 | 5157 | /* Output the annotation. */ |
d6a3cc15 RS |
5158 | tem = Fcdr (Fcar (*annot)); |
5159 | if (STRINGP (tem)) | |
5160 | { | |
f75d7a91 PE |
5161 | if (!e_write (desc, tem, 0, SCHARS (tem), coding)) |
5162 | return 0; | |
d6a3cc15 RS |
5163 | } |
5164 | *annot = Fcdr (*annot); | |
5165 | } | |
f75d7a91 | 5166 | return 1; |
d6a3cc15 RS |
5167 | } |
5168 | ||
f8498081 DA |
5169 | /* Maximum number of characters that the next |
5170 | function encodes per one loop iteration. */ | |
5171 | ||
5172 | enum { E_WRITE_MAX = 8 * 1024 * 1024 }; | |
6fdaa9a0 | 5173 | |
ce51c54c KH |
5174 | /* Write text in the range START and END into descriptor DESC, |
5175 | encoding them with coding system CODING. If STRING is nil, START | |
5176 | and END are character positions of the current buffer, else they | |
f75d7a91 | 5177 | are indexes to the string STRING. Return true if successful. */ |
ec7adf26 | 5178 | |
f75d7a91 | 5179 | static bool |
d311d28c | 5180 | e_write (int desc, Lisp_Object string, ptrdiff_t start, ptrdiff_t end, |
8a2cbd72 | 5181 | struct coding_system *coding) |
570d7624 | 5182 | { |
ce51c54c KH |
5183 | if (STRINGP (string)) |
5184 | { | |
db327c7e | 5185 | start = 0; |
8f924df7 | 5186 | end = SCHARS (string); |
ce51c54c | 5187 | } |
570d7624 | 5188 | |
6fdaa9a0 KH |
5189 | /* We used to have a code for handling selective display here. But, |
5190 | now it is handled within encode_coding. */ | |
01ca97a2 KH |
5191 | |
5192 | while (start < end) | |
570d7624 | 5193 | { |
01ca97a2 | 5194 | if (STRINGP (string)) |
6ad568dd | 5195 | { |
01ca97a2 KH |
5196 | coding->src_multibyte = SCHARS (string) < SBYTES (string); |
5197 | if (CODING_REQUIRE_ENCODING (coding)) | |
5198 | { | |
f8498081 DA |
5199 | ptrdiff_t nchars = min (end - start, E_WRITE_MAX); |
5200 | ||
5201 | /* Avoid creating huge Lisp string in encode_coding_object. */ | |
5202 | if (nchars == E_WRITE_MAX) | |
5203 | coding->raw_destination = 1; | |
5204 | ||
5205 | encode_coding_object | |
5206 | (coding, string, start, string_char_to_byte (string, start), | |
5207 | start + nchars, string_char_to_byte (string, start + nchars), | |
5208 | Qt); | |
01ca97a2 KH |
5209 | } |
5210 | else | |
5211 | { | |
5212 | coding->dst_object = string; | |
5213 | coding->consumed_char = SCHARS (string); | |
5214 | coding->produced = SBYTES (string); | |
5215 | } | |
6ad568dd | 5216 | } |
db327c7e | 5217 | else |
6ad568dd | 5218 | { |
d311d28c PE |
5219 | ptrdiff_t start_byte = CHAR_TO_BYTE (start); |
5220 | ptrdiff_t end_byte = CHAR_TO_BYTE (end); | |
b4132433 | 5221 | |
01ca97a2 KH |
5222 | coding->src_multibyte = (end - start) < (end_byte - start_byte); |
5223 | if (CODING_REQUIRE_ENCODING (coding)) | |
5224 | { | |
f8498081 DA |
5225 | ptrdiff_t nchars = min (end - start, E_WRITE_MAX); |
5226 | ||
5227 | /* Likewise. */ | |
5228 | if (nchars == E_WRITE_MAX) | |
5229 | coding->raw_destination = 1; | |
5230 | ||
5231 | encode_coding_object | |
5232 | (coding, Fcurrent_buffer (), start, start_byte, | |
5233 | start + nchars, CHAR_TO_BYTE (start + nchars), Qt); | |
01ca97a2 KH |
5234 | } |
5235 | else | |
5236 | { | |
5237 | coding->dst_object = Qnil; | |
5238 | coding->dst_pos_byte = start_byte; | |
5239 | if (start >= GPT || end <= GPT) | |
5240 | { | |
5241 | coding->consumed_char = end - start; | |
5242 | coding->produced = end_byte - start_byte; | |
5243 | } | |
5244 | else | |
5245 | { | |
5246 | coding->consumed_char = GPT - start; | |
5247 | coding->produced = GPT_BYTE - start_byte; | |
5248 | } | |
5249 | } | |
c185d744 | 5250 | } |
01ca97a2 KH |
5251 | |
5252 | if (coding->produced > 0) | |
c185d744 | 5253 | { |
f8498081 DA |
5254 | char *buf = (coding->raw_destination ? (char *) coding->destination |
5255 | : (STRINGP (coding->dst_object) | |
5256 | ? SSDATA (coding->dst_object) | |
5257 | : (char *) BYTE_POS_ADDR (coding->dst_pos_byte))); | |
4ebbdd67 | 5258 | coding->produced -= emacs_write_sig (desc, buf, coding->produced); |
01ca97a2 | 5259 | |
f8498081 DA |
5260 | if (coding->raw_destination) |
5261 | { | |
5262 | /* We're responsible for freeing this, see | |
5263 | encode_coding_object to check why. */ | |
5264 | xfree (coding->destination); | |
5265 | coding->raw_destination = 0; | |
5266 | } | |
01ca97a2 | 5267 | if (coding->produced) |
f75d7a91 | 5268 | return 0; |
570d7624 | 5269 | } |
01ca97a2 | 5270 | start += coding->consumed_char; |
c185d744 KH |
5271 | } |
5272 | ||
f75d7a91 | 5273 | return 1; |
570d7624 | 5274 | } |
ec7adf26 | 5275 | \f |
a7ca3326 | 5276 | DEFUN ("verify-visited-file-modtime", Fverify_visited_file_modtime, |
ec1b9b17 | 5277 | Sverify_visited_file_modtime, 0, 1, 0, |
8c1a1077 | 5278 | doc: /* Return t if last mod time of BUF's visited file matches what BUF records. |
6b61353c | 5279 | This means that the file has not been changed since it was visited or saved. |
ec1b9b17 | 5280 | If BUF is omitted or nil, it defaults to the current buffer. |
6b61353c | 5281 | See Info node `(elisp)Modification Time' for more details. */) |
5842a27b | 5282 | (Lisp_Object buf) |
570d7624 JB |
5283 | { |
5284 | struct buffer *b; | |
5285 | struct stat st; | |
32f4334d | 5286 | Lisp_Object handler; |
b1d1b865 | 5287 | Lisp_Object filename; |
43aac990 | 5288 | struct timespec mtime; |
570d7624 | 5289 | |
ec1b9b17 GM |
5290 | if (NILP (buf)) |
5291 | b = current_buffer; | |
5292 | else | |
5293 | { | |
5294 | CHECK_BUFFER (buf); | |
5295 | b = XBUFFER (buf); | |
5296 | } | |
570d7624 | 5297 | |
4b4deea2 | 5298 | if (!STRINGP (BVAR (b, filename))) return Qt; |
43aac990 | 5299 | if (b->modtime.tv_nsec == UNKNOWN_MODTIME_NSECS) return Qt; |
570d7624 | 5300 | |
32f4334d RS |
5301 | /* If the file name has special constructs in it, |
5302 | call the corresponding file handler. */ | |
4b4deea2 | 5303 | handler = Ffind_file_name_handler (BVAR (b, filename), |
49307295 | 5304 | Qverify_visited_file_modtime); |
32f4334d | 5305 | if (!NILP (handler)) |
09121adc | 5306 | return call2 (handler, Qverify_visited_file_modtime, buf); |
32f4334d | 5307 | |
4b4deea2 | 5308 | filename = ENCODE_FILE (BVAR (b, filename)); |
b1d1b865 | 5309 | |
dbeed9a6 PE |
5310 | mtime = (stat (SSDATA (filename), &st) == 0 |
5311 | ? get_stat_mtime (&st) | |
f0941253 | 5312 | : time_error_value (errno)); |
43aac990 | 5313 | if (timespec_cmp (mtime, b->modtime) == 0 |
645c6a30 PE |
5314 | && (b->modtime_size < 0 |
5315 | || st.st_size == b->modtime_size)) | |
570d7624 JB |
5316 | return Qt; |
5317 | return Qnil; | |
5318 | } | |
5319 | ||
f5d5eccf | 5320 | DEFUN ("visited-file-modtime", Fvisited_file_modtime, |
8c1a1077 PJ |
5321 | Svisited_file_modtime, 0, 0, 0, |
5322 | doc: /* Return the current buffer's recorded visited file modification time. | |
d35af63c | 5323 | The value is a list of the form (HIGH LOW USEC PSEC), like the time values that |
1c4d7f3d LMI |
5324 | `file-attributes' returns. If the current buffer has no recorded file |
5325 | modification time, this function returns 0. If the visited file | |
954b166e | 5326 | doesn't exist, return -1. |
6b61353c | 5327 | See Info node `(elisp)Modification Time' for more details. */) |
5842a27b | 5328 | (void) |
f5d5eccf | 5329 | { |
43aac990 | 5330 | int ns = current_buffer->modtime.tv_nsec; |
954b166e PE |
5331 | if (ns < 0) |
5332 | return make_number (UNKNOWN_MODTIME_NSECS - ns); | |
d35af63c | 5333 | return make_lisp_time (current_buffer->modtime); |
f5d5eccf RS |
5334 | } |
5335 | ||
570d7624 | 5336 | DEFUN ("set-visited-file-modtime", Fset_visited_file_modtime, |
8c1a1077 PJ |
5337 | Sset_visited_file_modtime, 0, 1, 0, |
5338 | doc: /* Update buffer's recorded modification time from the visited file's time. | |
5339 | Useful if the buffer was not read from the file normally | |
5340 | or if the file itself has been changed for some known benign reason. | |
5341 | An argument specifies the modification time value to use | |
5342 | \(instead of that of the visited file), in the form of a list | |
954b166e PE |
5343 | \(HIGH LOW USEC PSEC) or an integer flag as returned by |
5344 | `visited-file-modtime'. */) | |
5345 | (Lisp_Object time_flag) | |
570d7624 | 5346 | { |
954b166e | 5347 | if (!NILP (time_flag)) |
58b963f7 | 5348 | { |
43aac990 | 5349 | struct timespec mtime; |
954b166e PE |
5350 | if (INTEGERP (time_flag)) |
5351 | { | |
5352 | CHECK_RANGED_INTEGER (time_flag, -1, 0); | |
43aac990 | 5353 | mtime = make_timespec (0, UNKNOWN_MODTIME_NSECS - XINT (time_flag)); |
954b166e PE |
5354 | } |
5355 | else | |
5356 | mtime = lisp_time_argument (time_flag); | |
5357 | ||
5358 | current_buffer->modtime = mtime; | |
58b963f7 SM |
5359 | current_buffer->modtime_size = -1; |
5360 | } | |
f5d5eccf RS |
5361 | else |
5362 | { | |
5363 | register Lisp_Object filename; | |
5364 | struct stat st; | |
5365 | Lisp_Object handler; | |
570d7624 | 5366 | |
4b4deea2 | 5367 | filename = Fexpand_file_name (BVAR (current_buffer, filename), Qnil); |
32f4334d | 5368 | |
f5d5eccf RS |
5369 | /* If the file name has special constructs in it, |
5370 | call the corresponding file handler. */ | |
49307295 | 5371 | handler = Ffind_file_name_handler (filename, Qset_visited_file_modtime); |
f5d5eccf | 5372 | if (!NILP (handler)) |
caf3c431 | 5373 | /* The handler can find the file name the same way we did. */ |
76c881b0 | 5374 | return call2 (handler, Qset_visited_file_modtime, Qnil); |
b1d1b865 RS |
5375 | |
5376 | filename = ENCODE_FILE (filename); | |
5377 | ||
42a5b22f | 5378 | if (stat (SSDATA (filename), &st) >= 0) |
58b963f7 | 5379 | { |
d35af63c | 5380 | current_buffer->modtime = get_stat_mtime (&st); |
58b963f7 SM |
5381 | current_buffer->modtime_size = st.st_size; |
5382 | } | |
f5d5eccf | 5383 | } |
570d7624 JB |
5384 | |
5385 | return Qnil; | |
5386 | } | |
5387 | \f | |
f14b7e14 | 5388 | static Lisp_Object |
f839df0c | 5389 | auto_save_error (Lisp_Object error_val) |
570d7624 | 5390 | { |
d7f31e22 | 5391 | Lisp_Object args[3], msg; |
b09cca6a | 5392 | int i; |
d7f31e22 | 5393 | struct gcpro gcpro1; |
efdc16c9 | 5394 | |
ca730bf0 CY |
5395 | auto_save_error_occurred = 1; |
5396 | ||
385ed61f | 5397 | ring_bell (XFRAME (selected_frame)); |
efdc16c9 | 5398 | |
d7f31e22 | 5399 | args[0] = build_string ("Auto-saving %s: %s"); |
4b4deea2 | 5400 | args[1] = BVAR (current_buffer, name); |
f839df0c | 5401 | args[2] = Ferror_message_string (error_val); |
d7f31e22 GM |
5402 | msg = Fformat (3, args); |
5403 | GCPRO1 (msg); | |
d7f31e22 GM |
5404 | |
5405 | for (i = 0; i < 3; ++i) | |
5406 | { | |
5407 | if (i == 0) | |
b09cca6a | 5408 | message3 (msg); |
d7f31e22 | 5409 | else |
b09cca6a | 5410 | message3_nolog (msg); |
d7f31e22 GM |
5411 | Fsleep_for (make_number (1), Qnil); |
5412 | } | |
5413 | ||
5414 | UNGCPRO; | |
570d7624 JB |
5415 | return Qnil; |
5416 | } | |
5417 | ||
f14b7e14 | 5418 | static Lisp_Object |
971de7fb | 5419 | auto_save_1 (void) |
570d7624 | 5420 | { |
570d7624 | 5421 | struct stat st; |
d4a42098 KS |
5422 | Lisp_Object modes; |
5423 | ||
5424 | auto_save_mode_bits = 0666; | |
570d7624 JB |
5425 | |
5426 | /* Get visited file's mode to become the auto save file's mode. */ | |
4b4deea2 | 5427 | if (! NILP (BVAR (current_buffer, filename))) |
d4a42098 | 5428 | { |
4b4deea2 | 5429 | if (stat (SSDATA (BVAR (current_buffer, filename)), &st) >= 0) |
d4a42098 | 5430 | /* But make sure we can overwrite it later! */ |
18c52557 | 5431 | auto_save_mode_bits = (st.st_mode | 0600) & 0777; |
ce2fe65a AS |
5432 | else if (modes = Ffile_modes (BVAR (current_buffer, filename)), |
5433 | INTEGERP (modes)) | |
d4a42098 | 5434 | /* Remote files don't cooperate with stat. */ |
18c52557 | 5435 | auto_save_mode_bits = (XINT (modes) | 0600) & 0777; |
d4a42098 | 5436 | } |
570d7624 JB |
5437 | |
5438 | return | |
4b4deea2 | 5439 | Fwrite_region (Qnil, Qnil, BVAR (current_buffer, auto_save_file_name), Qnil, |
699b53bc CY |
5440 | NILP (Vauto_save_visited_file_name) ? Qlambda : Qt, |
5441 | Qnil, Qnil); | |
570d7624 JB |
5442 | } |
5443 | ||
27e498e6 PE |
5444 | struct auto_save_unwind |
5445 | { | |
5446 | FILE *stream; | |
5447 | bool auto_raise; | |
5448 | }; | |
410ed5c3 | 5449 | |
27e498e6 PE |
5450 | static void |
5451 | do_auto_save_unwind (void *arg) | |
e54d3b5d | 5452 | { |
27e498e6 PE |
5453 | struct auto_save_unwind *p = arg; |
5454 | FILE *stream = p->stream; | |
5455 | minibuffer_auto_raise = p->auto_raise; | |
3be3c08e | 5456 | auto_saving = 0; |
fff7e982 | 5457 | if (stream != NULL) |
aab12958 | 5458 | { |
4d7e6e51 | 5459 | block_input (); |
aab12958 | 5460 | fclose (stream); |
4d7e6e51 | 5461 | unblock_input (); |
aab12958 | 5462 | } |
a8c828be RS |
5463 | } |
5464 | ||
5794dd61 | 5465 | static Lisp_Object |
971de7fb | 5466 | do_auto_save_make_dir (Lisp_Object dir) |
5794dd61 | 5467 | { |
09450bae | 5468 | Lisp_Object result; |
26816cbf | 5469 | |
09450bae PE |
5470 | auto_saving_dir_umask = 077; |
5471 | result = call2 (Qmake_directory, dir, Qt); | |
5472 | auto_saving_dir_umask = 0; | |
5473 | return result; | |
5794dd61 RS |
5474 | } |
5475 | ||
5476 | static Lisp_Object | |
971de7fb | 5477 | do_auto_save_eh (Lisp_Object ignore) |
5794dd61 | 5478 | { |
09450bae | 5479 | auto_saving_dir_umask = 0; |
5794dd61 RS |
5480 | return Qnil; |
5481 | } | |
5482 | ||
a7ca3326 | 5483 | DEFUN ("do-auto-save", Fdo_auto_save, Sdo_auto_save, 0, 2, "", |
8c1a1077 PJ |
5484 | doc: /* Auto-save all buffers that need it. |
5485 | This is all buffers that have auto-saving enabled | |
5486 | and are changed since last auto-saved. | |
5487 | Auto-saving writes the buffer into a file | |
5488 | so that your editing is not lost if the system crashes. | |
5489 | This file is not the file you visited; that changes only when you save. | |
5490 | Normally we run the normal hook `auto-save-hook' before saving. | |
5491 | ||
5492 | A non-nil NO-MESSAGE argument means do not print any message if successful. | |
5493 | A non-nil CURRENT-ONLY argument means save only current buffer. */) | |
5842a27b | 5494 | (Lisp_Object no_message, Lisp_Object current_only) |
570d7624 JB |
5495 | { |
5496 | struct buffer *old = current_buffer, *b; | |
dee091a3 | 5497 | Lisp_Object tail, buf, hook; |
f75d7a91 | 5498 | bool auto_saved = 0; |
f14b1c68 | 5499 | int do_handled_files; |
ff4c9993 | 5500 | Lisp_Object oquit; |
fff7e982 | 5501 | FILE *stream = NULL; |
d311d28c | 5502 | ptrdiff_t count = SPECPDL_INDEX (); |
f75d7a91 | 5503 | bool orig_minibuffer_auto_raise = minibuffer_auto_raise; |
fce31d69 | 5504 | bool old_message_p = 0; |
27e498e6 | 5505 | struct auto_save_unwind auto_save_unwind; |
d57563b6 | 5506 | struct gcpro gcpro1, gcpro2; |
38da540d RS |
5507 | |
5508 | if (max_specpdl_size < specpdl_size + 40) | |
5509 | max_specpdl_size = specpdl_size + 40; | |
5510 | ||
5511 | if (minibuf_level) | |
5512 | no_message = Qt; | |
5513 | ||
5794dd61 RS |
5514 | if (NILP (no_message)) |
5515 | { | |
5516 | old_message_p = push_message (); | |
27e498e6 | 5517 | record_unwind_protect_void (pop_message_unwind); |
5794dd61 | 5518 | } |
efdc16c9 | 5519 | |
ff4c9993 RS |
5520 | /* Ordinarily don't quit within this function, |
5521 | but don't make it impossible to quit (in case we get hung in I/O). */ | |
5522 | oquit = Vquit_flag; | |
5523 | Vquit_flag = Qnil; | |
570d7624 JB |
5524 | |
5525 | /* No GCPRO needed, because (when it matters) all Lisp_Object variables | |
5526 | point to non-strings reached from Vbuffer_alist. */ | |
5527 | ||
dee091a3 | 5528 | hook = intern ("auto-save-hook"); |
afbfe143 | 5529 | safe_run_hooks (hook); |
570d7624 | 5530 | |
e54d3b5d RS |
5531 | if (STRINGP (Vauto_save_list_file_name)) |
5532 | { | |
0894672f | 5533 | Lisp_Object listfile; |
efdc16c9 | 5534 | |
258fd2cb | 5535 | listfile = Fexpand_file_name (Vauto_save_list_file_name, Qnil); |
0894672f GM |
5536 | |
5537 | /* Don't try to create the directory when shutting down Emacs, | |
5538 | because creating the directory might signal an error, and | |
5539 | that would leave Emacs in a strange state. */ | |
5540 | if (!NILP (Vrun_hooks)) | |
5541 | { | |
5542 | Lisp_Object dir; | |
d57563b6 RS |
5543 | dir = Qnil; |
5544 | GCPRO2 (dir, listfile); | |
0894672f GM |
5545 | dir = Ffile_name_directory (listfile); |
5546 | if (NILP (Ffile_directory_p (dir))) | |
5794dd61 | 5547 | internal_condition_case_1 (do_auto_save_make_dir, |
09450bae | 5548 | dir, Qt, |
5794dd61 | 5549 | do_auto_save_eh); |
d57563b6 | 5550 | UNGCPRO; |
0894672f | 5551 | } |
efdc16c9 | 5552 | |
406af475 | 5553 | stream = emacs_fopen (SSDATA (listfile), "w"); |
1b335d29 | 5554 | } |
199607e4 | 5555 | |
27e498e6 PE |
5556 | auto_save_unwind.stream = stream; |
5557 | auto_save_unwind.auto_raise = minibuffer_auto_raise; | |
5558 | record_unwind_protect_ptr (do_auto_save_unwind, &auto_save_unwind); | |
a8c828be | 5559 | minibuffer_auto_raise = 0; |
3be3c08e | 5560 | auto_saving = 1; |
ca730bf0 | 5561 | auto_save_error_occurred = 0; |
3be3c08e | 5562 | |
6b61353c KH |
5563 | /* On first pass, save all files that don't have handlers. |
5564 | On second pass, save all files that do have handlers. | |
5565 | ||
5566 | If Emacs is crashing, the handlers may tweak what is causing | |
5567 | Emacs to crash in the first place, and it would be a shame if | |
5568 | Emacs failed to autosave perfectly ordinary files because it | |
5569 | couldn't handle some ange-ftp'd file. */ | |
5570 | ||
f14b1c68 | 5571 | for (do_handled_files = 0; do_handled_files < 2; do_handled_files++) |
8f3a2c26 | 5572 | FOR_EACH_LIVE_BUFFER (tail, buf) |
f14b1c68 | 5573 | { |
f14b1c68 | 5574 | b = XBUFFER (buf); |
199607e4 | 5575 | |
e54d3b5d | 5576 | /* Record all the buffers that have auto save mode |
258fd2cb RS |
5577 | in the special file that lists them. For each of these buffers, |
5578 | Record visited name (if any) and auto save name. */ | |
4b4deea2 | 5579 | if (STRINGP (BVAR (b, auto_save_file_name)) |
1b335d29 | 5580 | && stream != NULL && do_handled_files == 0) |
e54d3b5d | 5581 | { |
4d7e6e51 | 5582 | block_input (); |
4b4deea2 | 5583 | if (!NILP (BVAR (b, filename))) |
258fd2cb | 5584 | { |
4b4deea2 TT |
5585 | fwrite (SDATA (BVAR (b, filename)), 1, |
5586 | SBYTES (BVAR (b, filename)), stream); | |
258fd2cb | 5587 | } |
1b335d29 | 5588 | putc ('\n', stream); |
4b4deea2 TT |
5589 | fwrite (SDATA (BVAR (b, auto_save_file_name)), 1, |
5590 | SBYTES (BVAR (b, auto_save_file_name)), stream); | |
1b335d29 | 5591 | putc ('\n', stream); |
4d7e6e51 | 5592 | unblock_input (); |
e54d3b5d | 5593 | } |
17857782 | 5594 | |
f14b1c68 JB |
5595 | if (!NILP (current_only) |
5596 | && b != current_buffer) | |
5597 | continue; | |
e54d3b5d | 5598 | |
95385625 RS |
5599 | /* Don't auto-save indirect buffers. |
5600 | The base buffer takes care of it. */ | |
5601 | if (b->base_buffer) | |
5602 | continue; | |
5603 | ||
f14b1c68 JB |
5604 | /* Check for auto save enabled |
5605 | and file changed since last auto save | |
5606 | and file changed since last real save. */ | |
4b4deea2 | 5607 | if (STRINGP (BVAR (b, auto_save_file_name)) |
95385625 | 5608 | && BUF_SAVE_MODIFF (b) < BUF_MODIFF (b) |
0b5397c2 | 5609 | && BUF_AUTOSAVE_MODIFF (b) < BUF_MODIFF (b) |
82c2d839 | 5610 | /* -1 means we've turned off autosaving for a while--see below. */ |
4b4deea2 | 5611 | && XINT (BVAR (b, save_length)) >= 0 |
f14b1c68 | 5612 | && (do_handled_files |
4b4deea2 | 5613 | || NILP (Ffind_file_name_handler (BVAR (b, auto_save_file_name), |
49307295 | 5614 | Qwrite_region)))) |
f14b1c68 | 5615 | { |
43aac990 PE |
5616 | struct timespec before_time = current_timespec (); |
5617 | struct timespec after_time; | |
b60247d9 RS |
5618 | |
5619 | /* If we had a failure, don't try again for 20 minutes. */ | |
d311d28c | 5620 | if (b->auto_save_failure_time > 0 |
43aac990 | 5621 | && before_time.tv_sec - b->auto_save_failure_time < 1200) |
b60247d9 RS |
5622 | continue; |
5623 | ||
090101cf CY |
5624 | set_buffer_internal (b); |
5625 | if (NILP (Vauto_save_include_big_deletions) | |
4b4deea2 | 5626 | && (XFASTINT (BVAR (b, save_length)) * 10 |
4be941e3 | 5627 | > (BUF_Z (b) - BUF_BEG (b)) * 13) |
f14b1c68 JB |
5628 | /* A short file is likely to change a large fraction; |
5629 | spare the user annoying messages. */ | |
4b4deea2 | 5630 | && XFASTINT (BVAR (b, save_length)) > 5000 |
f14b1c68 | 5631 | /* These messages are frequent and annoying for `*mail*'. */ |
4b4deea2 | 5632 | && !EQ (BVAR (b, filename), Qnil) |
f14b1c68 JB |
5633 | && NILP (no_message)) |
5634 | { | |
5635 | /* It has shrunk too much; turn off auto-saving here. */ | |
a8c828be | 5636 | minibuffer_auto_raise = orig_minibuffer_auto_raise; |
fd91d0d4 | 5637 | message_with_string ("Buffer %s has shrunk a lot; auto save disabled in that buffer until next real save", |
4b4deea2 | 5638 | BVAR (b, name), 1); |
a8c828be | 5639 | minibuffer_auto_raise = 0; |
82c2d839 RS |
5640 | /* Turn off auto-saving until there's a real save, |
5641 | and prevent any more warnings. */ | |
4b4deea2 | 5642 | XSETINT (BVAR (b, save_length), -1); |
f14b1c68 JB |
5643 | Fsleep_for (make_number (1), Qnil); |
5644 | continue; | |
5645 | } | |
f14b1c68 JB |
5646 | if (!auto_saved && NILP (no_message)) |
5647 | message1 ("Auto-saving..."); | |
5648 | internal_condition_case (auto_save_1, Qt, auto_save_error); | |
f75d7a91 | 5649 | auto_saved = 1; |
0b5397c2 | 5650 | BUF_AUTOSAVE_MODIFF (b) = BUF_MODIFF (b); |
4b4deea2 | 5651 | XSETFASTINT (BVAR (current_buffer, save_length), Z - BEG); |
f14b1c68 | 5652 | set_buffer_internal (old); |
b60247d9 | 5653 | |
43aac990 | 5654 | after_time = current_timespec (); |
b60247d9 RS |
5655 | |
5656 | /* If auto-save took more than 60 seconds, | |
5657 | assume it was an NFS failure that got a timeout. */ | |
43aac990 PE |
5658 | if (after_time.tv_sec - before_time.tv_sec > 60) |
5659 | b->auto_save_failure_time = after_time.tv_sec; | |
f14b1c68 JB |
5660 | } |
5661 | } | |
570d7624 | 5662 | |
b67f2ca5 RS |
5663 | /* Prevent another auto save till enough input events come in. */ |
5664 | record_auto_save (); | |
570d7624 | 5665 | |
17857782 | 5666 | if (auto_saved && NILP (no_message)) |
f05b275b | 5667 | { |
5794dd61 | 5668 | if (old_message_p) |
31f3d831 | 5669 | { |
5794dd61 RS |
5670 | /* If we are going to restore an old message, |
5671 | give time to read ours. */ | |
83f8d903 | 5672 | sit_for (make_number (1), 0, 0); |
c71106e5 | 5673 | restore_message (); |
31f3d831 | 5674 | } |
ca730bf0 | 5675 | else if (!auto_save_error_occurred) |
31e31a15 CY |
5676 | /* Don't overwrite the error message if an error occurred. |
5677 | If we displayed a message and then restored a state | |
5794dd61 | 5678 | with no message, leave a "done" message on the screen. */ |
f05b275b KH |
5679 | message1 ("Auto-saving...done"); |
5680 | } | |
570d7624 | 5681 | |
ff4c9993 RS |
5682 | Vquit_flag = oquit; |
5683 | ||
5794dd61 | 5684 | /* This restores the message-stack status. */ |
e54d3b5d | 5685 | unbind_to (count, Qnil); |
570d7624 JB |
5686 | return Qnil; |
5687 | } | |
5688 | ||
5689 | DEFUN ("set-buffer-auto-saved", Fset_buffer_auto_saved, | |
8c1a1077 PJ |
5690 | Sset_buffer_auto_saved, 0, 0, 0, |
5691 | doc: /* Mark current buffer as auto-saved with its current text. | |
5692 | No auto-save file will be written until the buffer changes again. */) | |
5842a27b | 5693 | (void) |
570d7624 | 5694 | { |
0b5397c2 SM |
5695 | /* FIXME: This should not be called in indirect buffers, since |
5696 | they're not autosaved. */ | |
5697 | BUF_AUTOSAVE_MODIFF (current_buffer) = MODIFF; | |
4b4deea2 | 5698 | XSETFASTINT (BVAR (current_buffer, save_length), Z - BEG); |
d311d28c | 5699 | current_buffer->auto_save_failure_time = 0; |
b60247d9 RS |
5700 | return Qnil; |
5701 | } | |
5702 | ||
5703 | DEFUN ("clear-buffer-auto-save-failure", Fclear_buffer_auto_save_failure, | |
8c1a1077 PJ |
5704 | Sclear_buffer_auto_save_failure, 0, 0, 0, |
5705 | doc: /* Clear any record of a recent auto-save failure in the current buffer. */) | |
5842a27b | 5706 | (void) |
b60247d9 | 5707 | { |
d311d28c | 5708 | current_buffer->auto_save_failure_time = 0; |
570d7624 JB |
5709 | return Qnil; |
5710 | } | |
5711 | ||
5712 | DEFUN ("recent-auto-save-p", Frecent_auto_save_p, Srecent_auto_save_p, | |
8c1a1077 | 5713 | 0, 0, 0, |
68780e2a RS |
5714 | doc: /* Return t if current buffer has been auto-saved recently. |
5715 | More precisely, if it has been auto-saved since last read from or saved | |
5716 | in the visited file. If the buffer has no visited file, | |
5717 | then any auto-save counts as "recent". */) | |
5842a27b | 5718 | (void) |
570d7624 | 5719 | { |
0b5397c2 SM |
5720 | /* FIXME: maybe we should return nil for indirect buffers since |
5721 | they're never autosaved. */ | |
5722 | return (SAVE_MODIFF < BUF_AUTOSAVE_MODIFF (current_buffer) ? Qt : Qnil); | |
570d7624 JB |
5723 | } |
5724 | \f | |
5725 | /* Reading and completing file names */ | |
6e710ae5 | 5726 | |
88208bb8 JD |
5727 | DEFUN ("next-read-file-uses-dialog-p", Fnext_read_file_uses_dialog_p, |
5728 | Snext_read_file_uses_dialog_p, 0, 0, 0, | |
5729 | doc: /* Return t if a call to `read-file-name' will use a dialog. | |
5730 | The return value is only relevant for a call to `read-file-name' that happens | |
1a0de25c | 5731 | before any other event (mouse or keypress) is handled. */) |
5842a27b | 5732 | (void) |
88208bb8 | 5733 | { |
d7e642cc JD |
5734 | #if defined (USE_MOTIF) || defined (HAVE_NTGUI) || defined (USE_GTK) \ |
5735 | || defined (HAVE_NS) | |
88208bb8 JD |
5736 | if ((NILP (last_nonmenu_event) || CONSP (last_nonmenu_event)) |
5737 | && use_dialog_box | |
5738 | && use_file_dialog | |
7452b7bd | 5739 | && window_system_available (SELECTED_FRAME ())) |
88208bb8 JD |
5740 | return Qt; |
5741 | #endif | |
5742 | return Qnil; | |
5743 | } | |
d4a42098 | 5744 | |
dbd50d4b | 5745 | Lisp_Object |
971de7fb | 5746 | Fread_file_name (Lisp_Object prompt, Lisp_Object dir, Lisp_Object default_filename, Lisp_Object mustmatch, Lisp_Object initial, Lisp_Object predicate) |
570d7624 | 5747 | { |
fd4ead52 | 5748 | struct gcpro gcpro1; |
dbd50d4b | 5749 | Lisp_Object args[7]; |
a79485af | 5750 | |
71e1f69d | 5751 | GCPRO1 (default_filename); |
dbd50d4b SM |
5752 | args[0] = intern ("read-file-name"); |
5753 | args[1] = prompt; | |
5754 | args[2] = dir; | |
5755 | args[3] = default_filename; | |
5756 | args[4] = mustmatch; | |
5757 | args[5] = initial; | |
5758 | args[6] = predicate; | |
5759 | RETURN_UNGCPRO (Ffuncall (7, args)); | |
570d7624 | 5760 | } |
9c856db9 | 5761 | |
570d7624 | 5762 | \f |
9fe43ff6 PE |
5763 | void |
5764 | init_fileio (void) | |
5765 | { | |
5766 | valid_timestamp_file_system = 0; | |
1db72ad3 RF |
5767 | |
5768 | /* fsync can be a significant performance hit. Often it doesn't | |
5769 | suffice to make the file-save operation survive a crash. For | |
5770 | batch scripts, which are typically part of larger shell commands | |
5771 | that don't fsync other files, its effect on performance can be | |
5772 | significant so its utility is particularly questionable. | |
5773 | Hence, for now by default fsync is used only when interactive. | |
5774 | ||
5775 | For more on why fsync often fails to work on today's hardware, see: | |
5776 | Zheng M et al. Understanding the robustness of SSDs under power fault. | |
5777 | 11th USENIX Conf. on File and Storage Technologies, 2013 (FAST '13), 271-84 | |
5778 | http://www.usenix.org/system/files/conference/fast13/fast13-final80.pdf | |
5779 | ||
5780 | For more on why fsync does not suffice even if it works properly, see: | |
5781 | Roche X. Necessary step(s) to synchronize filename operations on disk. | |
5782 | Austin Group Defect 672, 2013-03-19 | |
5783 | http://austingroupbugs.net/view.php?id=672 */ | |
5784 | write_region_inhibit_fsync = noninteractive; | |
9fe43ff6 PE |
5785 | } |
5786 | ||
dfcf069d | 5787 | void |
971de7fb | 5788 | syms_of_fileio (void) |
570d7624 | 5789 | { |
cd3520a4 JB |
5790 | DEFSYM (Qoperations, "operations"); |
5791 | DEFSYM (Qexpand_file_name, "expand-file-name"); | |
5792 | DEFSYM (Qsubstitute_in_file_name, "substitute-in-file-name"); | |
5793 | DEFSYM (Qdirectory_file_name, "directory-file-name"); | |
5794 | DEFSYM (Qfile_name_directory, "file-name-directory"); | |
5795 | DEFSYM (Qfile_name_nondirectory, "file-name-nondirectory"); | |
5796 | DEFSYM (Qunhandled_file_name_directory, "unhandled-file-name-directory"); | |
5797 | DEFSYM (Qfile_name_as_directory, "file-name-as-directory"); | |
5798 | DEFSYM (Qcopy_file, "copy-file"); | |
5799 | DEFSYM (Qmake_directory_internal, "make-directory-internal"); | |
5800 | DEFSYM (Qmake_directory, "make-directory"); | |
5801 | DEFSYM (Qdelete_directory_internal, "delete-directory-internal"); | |
5802 | DEFSYM (Qdelete_file, "delete-file"); | |
5803 | DEFSYM (Qrename_file, "rename-file"); | |
5804 | DEFSYM (Qadd_name_to_file, "add-name-to-file"); | |
5805 | DEFSYM (Qmake_symbolic_link, "make-symbolic-link"); | |
5806 | DEFSYM (Qfile_exists_p, "file-exists-p"); | |
5807 | DEFSYM (Qfile_executable_p, "file-executable-p"); | |
5808 | DEFSYM (Qfile_readable_p, "file-readable-p"); | |
5809 | DEFSYM (Qfile_writable_p, "file-writable-p"); | |
5810 | DEFSYM (Qfile_symlink_p, "file-symlink-p"); | |
5811 | DEFSYM (Qaccess_file, "access-file"); | |
5812 | DEFSYM (Qfile_directory_p, "file-directory-p"); | |
5813 | DEFSYM (Qfile_regular_p, "file-regular-p"); | |
5814 | DEFSYM (Qfile_accessible_directory_p, "file-accessible-directory-p"); | |
5815 | DEFSYM (Qfile_modes, "file-modes"); | |
5816 | DEFSYM (Qset_file_modes, "set-file-modes"); | |
5817 | DEFSYM (Qset_file_times, "set-file-times"); | |
5818 | DEFSYM (Qfile_selinux_context, "file-selinux-context"); | |
5819 | DEFSYM (Qset_file_selinux_context, "set-file-selinux-context"); | |
7c3d167f RF |
5820 | DEFSYM (Qfile_acl, "file-acl"); |
5821 | DEFSYM (Qset_file_acl, "set-file-acl"); | |
cd3520a4 JB |
5822 | DEFSYM (Qfile_newer_than_file_p, "file-newer-than-file-p"); |
5823 | DEFSYM (Qinsert_file_contents, "insert-file-contents"); | |
9dbda100 | 5824 | DEFSYM (Qchoose_write_coding_system, "choose-write-coding-system"); |
cd3520a4 JB |
5825 | DEFSYM (Qwrite_region, "write-region"); |
5826 | DEFSYM (Qverify_visited_file_modtime, "verify-visited-file-modtime"); | |
5827 | DEFSYM (Qset_visited_file_modtime, "set-visited-file-modtime"); | |
5828 | DEFSYM (Qauto_save_coding, "auto-save-coding"); | |
5829 | ||
5830 | DEFSYM (Qfile_name_history, "file-name-history"); | |
642ef245 | 5831 | Fset (Qfile_name_history, Qnil); |
15c65264 | 5832 | |
cd3520a4 JB |
5833 | DEFSYM (Qfile_error, "file-error"); |
5834 | DEFSYM (Qfile_already_exists, "file-already-exists"); | |
5835 | DEFSYM (Qfile_date_error, "file-date-error"); | |
86dfb7a8 | 5836 | DEFSYM (Qfile_notify_error, "file-notify-error"); |
cd3520a4 | 5837 | DEFSYM (Qexcl, "excl"); |
570d7624 | 5838 | |
29208e82 | 5839 | DEFVAR_LISP ("file-name-coding-system", Vfile_name_coding_system, |
fb7ada5f | 5840 | doc: /* Coding system for encoding file names. |
7df14908 EZ |
5841 | If it is nil, `default-file-name-coding-system' (which see) is used. |
5842 | ||
5843 | On MS-Windows, the value of this variable is largely ignored if | |
6630df25 EZ |
5844 | \`w32-unicode-filenames' (which see) is non-nil. Emacs on Windows |
5845 | behaves as if file names were encoded in `utf-8'. */); | |
b1d1b865 RS |
5846 | Vfile_name_coding_system = Qnil; |
5847 | ||
cd913586 | 5848 | DEFVAR_LISP ("default-file-name-coding-system", |
29208e82 | 5849 | Vdefault_file_name_coding_system, |
8c1a1077 | 5850 | doc: /* Default coding system for encoding file names. |
346ebf53 | 5851 | This variable is used only when `file-name-coding-system' is nil. |
8c1a1077 | 5852 | |
346ebf53 | 5853 | This variable is set/changed by the command `set-language-environment'. |
8c1a1077 | 5854 | User should not set this variable manually, |
346ebf53 | 5855 | instead use `file-name-coding-system' to get a constant encoding |
7df14908 EZ |
5856 | of file names regardless of the current language environment. |
5857 | ||
5858 | On MS-Windows, the value of this variable is largely ignored if | |
6630df25 EZ |
5859 | \`w32-unicode-filenames' (which see) is non-nil. Emacs on Windows |
5860 | behaves as if file names were encoded in `utf-8'. */); | |
cd913586 KH |
5861 | Vdefault_file_name_coding_system = Qnil; |
5862 | ||
cd3520a4 JB |
5863 | DEFSYM (Qformat_decode, "format-decode"); |
5864 | DEFSYM (Qformat_annotate_function, "format-annotate-function"); | |
5865 | DEFSYM (Qafter_insert_file_set_coding, "after-insert-file-set-coding"); | |
5866 | DEFSYM (Qcar_less_than_car, "car-less-than-car"); | |
d6a3cc15 | 5867 | |
570d7624 | 5868 | Fput (Qfile_error, Qerror_conditions, |
d67b4f80 | 5869 | Fpurecopy (list2 (Qfile_error, Qerror))); |
570d7624 | 5870 | Fput (Qfile_error, Qerror_message, |
2a0213a6 | 5871 | build_pure_c_string ("File error")); |
570d7624 JB |
5872 | |
5873 | Fput (Qfile_already_exists, Qerror_conditions, | |
d67b4f80 | 5874 | Fpurecopy (list3 (Qfile_already_exists, Qfile_error, Qerror))); |
570d7624 | 5875 | Fput (Qfile_already_exists, Qerror_message, |
2a0213a6 | 5876 | build_pure_c_string ("File already exists")); |
570d7624 | 5877 | |
c0b7b21c | 5878 | Fput (Qfile_date_error, Qerror_conditions, |
d67b4f80 | 5879 | Fpurecopy (list3 (Qfile_date_error, Qfile_error, Qerror))); |
c0b7b21c | 5880 | Fput (Qfile_date_error, Qerror_message, |
2a0213a6 | 5881 | build_pure_c_string ("Cannot set file date")); |
c0b7b21c | 5882 | |
86dfb7a8 MA |
5883 | Fput (Qfile_notify_error, Qerror_conditions, |
5884 | Fpurecopy (list3 (Qfile_notify_error, Qfile_error, Qerror))); | |
5885 | Fput (Qfile_notify_error, Qerror_message, | |
5886 | build_pure_c_string ("File notification error")); | |
5887 | ||
29208e82 | 5888 | DEFVAR_LISP ("file-name-handler-alist", Vfile_name_handler_alist, |
a59225b1 CY |
5889 | doc: /* Alist of elements (REGEXP . HANDLER) for file names handled specially. |
5890 | If a file name matches REGEXP, all I/O on that file is done by calling | |
5891 | HANDLER. If a file name matches more than one handler, the handler | |
5892 | whose match starts last in the file name gets precedence. The | |
5893 | function `find-file-name-handler' checks this list for a handler for | |
5894 | its argument. | |
5895 | ||
5896 | HANDLER should be a function. The first argument given to it is the | |
5897 | name of the I/O primitive to be handled; the remaining arguments are | |
5898 | the arguments that were passed to that primitive. For example, if you | |
5899 | do (file-exists-p FILENAME) and FILENAME is handled by HANDLER, then | |
5900 | HANDLER is called like this: | |
5901 | ||
5902 | (funcall HANDLER 'file-exists-p FILENAME) | |
5903 | ||
5904 | Note that HANDLER must be able to handle all I/O primitives; if it has | |
5905 | nothing special to do for a primitive, it should reinvoke the | |
5906 | primitive to handle the operation \"the usual way\". | |
5907 | See Info node `(elisp)Magic File Names' for more details. */); | |
09121adc RS |
5908 | Vfile_name_handler_alist = Qnil; |
5909 | ||
0414b394 | 5910 | DEFVAR_LISP ("set-auto-coding-function", |
29208e82 | 5911 | Vset_auto_coding_function, |
8c1a1077 PJ |
5912 | doc: /* If non-nil, a function to call to decide a coding system of file. |
5913 | Two arguments are passed to this function: the file name | |
5914 | and the length of a file contents following the point. | |
5915 | This function should return a coding system to decode the file contents. | |
5916 | It should check the file name against `auto-coding-alist'. | |
5917 | If no coding system is decided, it should check a coding system | |
5918 | specified in the heading lines with the format: | |
5919 | -*- ... coding: CODING-SYSTEM; ... -*- | |
5920 | or local variable spec of the tailing lines with `coding:' tag. */); | |
0414b394 | 5921 | Vset_auto_coding_function = Qnil; |
c9e82392 | 5922 | |
29208e82 | 5923 | DEFVAR_LISP ("after-insert-file-functions", Vafter_insert_file_functions, |
8c1a1077 | 5924 | doc: /* A list of functions to be called at the end of `insert-file-contents'. |
0cf9f5b5 RS |
5925 | Each is passed one argument, the number of characters inserted, |
5926 | with point at the start of the inserted text. Each function | |
5927 | should leave point the same, and return the new character count. | |
cf6d2357 RS |
5928 | If `insert-file-contents' is intercepted by a handler from |
5929 | `file-name-handler-alist', that handler is responsible for calling the | |
5930 | functions in `after-insert-file-functions' if appropriate. */); | |
d6a3cc15 RS |
5931 | Vafter_insert_file_functions = Qnil; |
5932 | ||
29208e82 | 5933 | DEFVAR_LISP ("write-region-annotate-functions", Vwrite_region_annotate_functions, |
8c1a1077 PJ |
5934 | doc: /* A list of functions to be called at the start of `write-region'. |
5935 | Each is passed two arguments, START and END as for `write-region'. | |
5936 | These are usually two numbers but not always; see the documentation | |
5937 | for `write-region'. The function should return a list of pairs | |
5938 | of the form (POSITION . STRING), consisting of strings to be effectively | |
5939 | inserted at the specified positions of the file being written (1 means to | |
5940 | insert before the first byte written). The POSITIONs must be sorted into | |
67fbc0cb CY |
5941 | increasing order. |
5942 | ||
5943 | If there are several annotation functions, the lists returned by these | |
5944 | functions are merged destructively. As each annotation function runs, | |
5945 | the variable `write-region-annotations-so-far' contains a list of all | |
5946 | annotations returned by previous annotation functions. | |
5947 | ||
5948 | An annotation function can return with a different buffer current. | |
5949 | Doing so removes the annotations returned by previous functions, and | |
5950 | resets START and END to `point-min' and `point-max' of the new buffer. | |
5951 | ||
5952 | After `write-region' completes, Emacs calls the function stored in | |
5953 | `write-region-post-annotation-function', once for each buffer that was | |
5954 | current when building the annotations (i.e., at least once), with that | |
5955 | buffer current. */); | |
d6a3cc15 | 5956 | Vwrite_region_annotate_functions = Qnil; |
cd3520a4 | 5957 | DEFSYM (Qwrite_region_annotate_functions, "write-region-annotate-functions"); |
d6a3cc15 | 5958 | |
67fbc0cb | 5959 | DEFVAR_LISP ("write-region-post-annotation-function", |
29208e82 | 5960 | Vwrite_region_post_annotation_function, |
67fbc0cb CY |
5961 | doc: /* Function to call after `write-region' completes. |
5962 | The function is called with no arguments. If one or more of the | |
5963 | annotation functions in `write-region-annotate-functions' changed the | |
5964 | current buffer, the function stored in this variable is called for | |
5965 | each of those additional buffers as well, in addition to the original | |
5966 | buffer. The relevant buffer is current during each function call. */); | |
5967 | Vwrite_region_post_annotation_function = Qnil; | |
5968 | staticpro (&Vwrite_region_annotation_buffers); | |
5969 | ||
6fc6f94b | 5970 | DEFVAR_LISP ("write-region-annotations-so-far", |
29208e82 | 5971 | Vwrite_region_annotations_so_far, |
8c1a1077 PJ |
5972 | doc: /* When an annotation function is called, this holds the previous annotations. |
5973 | These are the annotations made by other annotation functions | |
5974 | that were already called. See also `write-region-annotate-functions'. */); | |
6fc6f94b RS |
5975 | Vwrite_region_annotations_so_far = Qnil; |
5976 | ||
29208e82 | 5977 | DEFVAR_LISP ("inhibit-file-name-handlers", Vinhibit_file_name_handlers, |
8c1a1077 PJ |
5978 | doc: /* A list of file name handlers that temporarily should not be used. |
5979 | This applies only to the operation `inhibit-file-name-operation'. */); | |
82c2d839 RS |
5980 | Vinhibit_file_name_handlers = Qnil; |
5981 | ||
29208e82 | 5982 | DEFVAR_LISP ("inhibit-file-name-operation", Vinhibit_file_name_operation, |
8c1a1077 | 5983 | doc: /* The operation for which `inhibit-file-name-handlers' is applicable. */); |
a65970a0 RS |
5984 | Vinhibit_file_name_operation = Qnil; |
5985 | ||
29208e82 | 5986 | DEFVAR_LISP ("auto-save-list-file-name", Vauto_save_list_file_name, |
8c1a1077 PJ |
5987 | doc: /* File name in which we write a list of all auto save file names. |
5988 | This variable is initialized automatically from `auto-save-list-file-prefix' | |
a2458031 | 5989 | shortly after Emacs reads your init file, if you have not yet given it |
8c1a1077 | 5990 | a non-nil value. */); |
e54d3b5d RS |
5991 | Vauto_save_list_file_name = Qnil; |
5992 | ||
29208e82 | 5993 | DEFVAR_LISP ("auto-save-visited-file-name", Vauto_save_visited_file_name, |
699b53bc CY |
5994 | doc: /* Non-nil says auto-save a buffer in the file it is visiting, when practical. |
5995 | Normally auto-save files are written under other names. */); | |
5996 | Vauto_save_visited_file_name = Qnil; | |
5997 | ||
29208e82 | 5998 | DEFVAR_LISP ("auto-save-include-big-deletions", Vauto_save_include_big_deletions, |
090101cf CY |
5999 | doc: /* If non-nil, auto-save even if a large part of the text is deleted. |
6000 | If nil, deleting a substantial portion of the text disables auto-save | |
6001 | in the buffer; this is the default behavior, because the auto-save | |
6002 | file is usually more useful if it contains the deleted text. */); | |
6003 | Vauto_save_include_big_deletions = Qnil; | |
6004 | ||
29208e82 | 6005 | DEFVAR_BOOL ("write-region-inhibit-fsync", write_region_inhibit_fsync, |
fb7ada5f | 6006 | doc: /* Non-nil means don't call fsync in `write-region'. |
e3f509dd | 6007 | This variable affects calls to `write-region' as well as save commands. |
cbee2131 PE |
6008 | Setting this to nil may avoid data loss if the system loses power or |
6009 | the operating system crashes. */); | |
1db72ad3 | 6010 | write_region_inhibit_fsync = 0; /* See also `init_fileio' above. */ |
ccf61795 | 6011 | |
29208e82 | 6012 | DEFVAR_BOOL ("delete-by-moving-to-trash", delete_by_moving_to_trash, |
6cf29fe8 | 6013 | doc: /* Specifies whether to use the system's trash can. |
f1a5d776 CY |
6014 | When non-nil, certain file deletion commands use the function |
6015 | `move-file-to-trash' instead of deleting files outright. | |
6016 | This includes interactive calls to `delete-file' and | |
6017 | `delete-directory' and the Dired deletion commands. */); | |
6cf29fe8 | 6018 | delete_by_moving_to_trash = 0; |
d67b4f80 | 6019 | Qdelete_by_moving_to_trash = intern_c_string ("delete-by-moving-to-trash"); |
cd3520a4 JB |
6020 | |
6021 | DEFSYM (Qmove_file_to_trash, "move-file-to-trash"); | |
6022 | DEFSYM (Qcopy_directory, "copy-directory"); | |
6023 | DEFSYM (Qdelete_directory, "delete-directory"); | |
ee041f2d | 6024 | DEFSYM (Qsubstitute_env_in_file_name, "substitute-env-in-file-name"); |
6cf29fe8 | 6025 | |
642ef245 | 6026 | defsubr (&Sfind_file_name_handler); |
570d7624 JB |
6027 | defsubr (&Sfile_name_directory); |
6028 | defsubr (&Sfile_name_nondirectory); | |
642ef245 | 6029 | defsubr (&Sunhandled_file_name_directory); |
570d7624 JB |
6030 | defsubr (&Sfile_name_as_directory); |
6031 | defsubr (&Sdirectory_file_name); | |
6032 | defsubr (&Smake_temp_name); | |
6033 | defsubr (&Sexpand_file_name); | |
6034 | defsubr (&Ssubstitute_in_file_name); | |
6035 | defsubr (&Scopy_file); | |
9bbe01fb | 6036 | defsubr (&Smake_directory_internal); |
9d8f3bd9 | 6037 | defsubr (&Sdelete_directory_internal); |
570d7624 JB |
6038 | defsubr (&Sdelete_file); |
6039 | defsubr (&Srename_file); | |
6040 | defsubr (&Sadd_name_to_file); | |
570d7624 | 6041 | defsubr (&Smake_symbolic_link); |
570d7624 JB |
6042 | defsubr (&Sfile_name_absolute_p); |
6043 | defsubr (&Sfile_exists_p); | |
6044 | defsubr (&Sfile_executable_p); | |
6045 | defsubr (&Sfile_readable_p); | |
6046 | defsubr (&Sfile_writable_p); | |
1f8653eb | 6047 | defsubr (&Saccess_file); |
570d7624 JB |
6048 | defsubr (&Sfile_symlink_p); |
6049 | defsubr (&Sfile_directory_p); | |
b72dea2a | 6050 | defsubr (&Sfile_accessible_directory_p); |
f793dc6c | 6051 | defsubr (&Sfile_regular_p); |
570d7624 JB |
6052 | defsubr (&Sfile_modes); |
6053 | defsubr (&Sset_file_modes); | |
819da85b | 6054 | defsubr (&Sset_file_times); |
574c05e2 | 6055 | defsubr (&Sfile_selinux_context); |
7c3d167f RF |
6056 | defsubr (&Sfile_acl); |
6057 | defsubr (&Sset_file_acl); | |
574c05e2 | 6058 | defsubr (&Sset_file_selinux_context); |
c24e9a53 RS |
6059 | defsubr (&Sset_default_file_modes); |
6060 | defsubr (&Sdefault_file_modes); | |
570d7624 JB |
6061 | defsubr (&Sfile_newer_than_file_p); |
6062 | defsubr (&Sinsert_file_contents); | |
9dbda100 | 6063 | defsubr (&Schoose_write_coding_system); |
570d7624 | 6064 | defsubr (&Swrite_region); |
d6a3cc15 | 6065 | defsubr (&Scar_less_than_car); |
570d7624 | 6066 | defsubr (&Sverify_visited_file_modtime); |
f5d5eccf | 6067 | defsubr (&Svisited_file_modtime); |
570d7624 JB |
6068 | defsubr (&Sset_visited_file_modtime); |
6069 | defsubr (&Sdo_auto_save); | |
6070 | defsubr (&Sset_buffer_auto_saved); | |
b60247d9 | 6071 | defsubr (&Sclear_buffer_auto_save_failure); |
570d7624 JB |
6072 | defsubr (&Srecent_auto_save_p); |
6073 | ||
88208bb8 | 6074 | defsubr (&Snext_read_file_uses_dialog_p); |
85ffea93 | 6075 | |
697c17a2 | 6076 | #ifdef HAVE_SYNC |
85ffea93 | 6077 | defsubr (&Sunix_sync); |
483a2e10 | 6078 | #endif |
570d7624 | 6079 | } |