Commit | Line | Data |
---|---|---|
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> |
1b335d29 | 23 | #include <stdio.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" |
385ed61f KL |
52 | #include "frame.h" |
53 | #include "dispextern.h" | |
570d7624 | 54 | |
5e570b75 RS |
55 | #ifdef WINDOWSNT |
56 | #define NOMINMAX 1 | |
57 | #include <windows.h> | |
5e570b75 | 58 | #include <fcntl.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 | #include <fcntl.h> |
7990d02a | 67 | #endif |
7990d02a | 68 | |
199607e4 | 69 | #ifdef DOS_NT |
199607e4 | 70 | /* On Windows, drive letters must be alphabetic - on DOS, the Netware |
a5bb9bd3 | 71 | redirector allows the six letters between 'Z' and 'a' as well. */ |
199607e4 RS |
72 | #ifdef MSDOS |
73 | #define IS_DRIVE(x) ((x) >= 'A' && (x) <= 'z') | |
74 | #endif | |
75 | #ifdef WINDOWSNT | |
620f13b0 | 76 | #define IS_DRIVE(x) c_isalpha (x) |
199607e4 | 77 | #endif |
f54b565c | 78 | /* Need to lower-case the drive letter, or else expanded |
53964682 | 79 | filenames will sometimes compare unequal, because |
f54b565c | 80 | `expand-file-name' doesn't always down-case the drive letter. */ |
620f13b0 | 81 | #define DRIVE_LETTER(x) c_tolower (x) |
199607e4 RS |
82 | #endif |
83 | ||
de5bf5d3 | 84 | #include "systime.h" |
ffdc270a | 85 | #include <acl.h> |
8654f9d7 PE |
86 | #include <allocator.h> |
87 | #include <careadlinkat.h> | |
d35af63c | 88 | #include <stat-time.h> |
570d7624 JB |
89 | |
90 | #ifdef HPUX | |
91 | #include <netio.h> | |
47e7b9e5 | 92 | #endif |
570d7624 | 93 | |
9c856db9 | 94 | #include "commands.h" |
9c856db9 | 95 | |
f75d7a91 PE |
96 | /* True during writing of auto-save files. */ |
97 | static bool auto_saving; | |
570d7624 | 98 | |
71873e2b | 99 | /* Nonzero umask during creation of auto-save directories. */ |
f75d7a91 | 100 | static mode_t auto_saving_dir_umask; |
09450bae | 101 | |
570d7624 | 102 | /* Set by auto_save_1 to mode of original file so Fwrite_region will create |
71873e2b | 103 | a new file with the same mode as the original. */ |
f75d7a91 | 104 | static mode_t auto_save_mode_bits; |
570d7624 | 105 | |
71873e2b | 106 | /* Set by auto_save_1 if an error occurred during the last auto-save. */ |
f75d7a91 | 107 | static bool auto_save_error_occurred; |
ca730bf0 | 108 | |
9fe43ff6 PE |
109 | /* If VALID_TIMESTAMP_FILE_SYSTEM, then TIMESTAMP_FILE_SYSTEM is the device |
110 | number of a file system where time stamps were observed to to work. */ | |
111 | static bool valid_timestamp_file_system; | |
112 | static dev_t timestamp_file_system; | |
113 | ||
356a6224 KH |
114 | /* The symbol bound to coding-system-for-read when |
115 | insert-file-contents is called for recovering a file. This is not | |
116 | an actual coding system name, but just an indicator to tell | |
117 | insert-file-contents to use `emacs-mule' with a special flag for | |
118 | auto saving and recovering a file. */ | |
955cbe7b | 119 | static Lisp_Object Qauto_save_coding; |
356a6224 | 120 | |
f6c9b683 RS |
121 | /* Property name of a file name handler, |
122 | which gives a list of operations it handles.. */ | |
955cbe7b | 123 | static Lisp_Object Qoperations; |
f6c9b683 | 124 | |
71873e2b | 125 | /* Lisp functions for translating file formats. */ |
955cbe7b | 126 | static Lisp_Object Qformat_decode, Qformat_annotate_function; |
0d420e88 | 127 | |
2080470e | 128 | /* Lisp function for setting buffer-file-coding-system and the |
b6426b03 | 129 | multibyteness of the current buffer after inserting a file. */ |
955cbe7b | 130 | static Lisp_Object Qafter_insert_file_set_coding; |
b6426b03 | 131 | |
955cbe7b | 132 | static Lisp_Object Qwrite_region_annotate_functions; |
67fbc0cb CY |
133 | /* Each time an annotation function changes the buffer, the new buffer |
134 | is added here. */ | |
5045092b | 135 | static Lisp_Object Vwrite_region_annotation_buffers; |
67fbc0cb | 136 | |
955cbe7b | 137 | static Lisp_Object Qdelete_by_moving_to_trash; |
d2b66acf | 138 | |
6cf29fe8 | 139 | /* Lisp function for moving files to trash. */ |
955cbe7b | 140 | static Lisp_Object Qmove_file_to_trash; |
6cf29fe8 | 141 | |
8719abec | 142 | /* Lisp function for recursively copying directories. */ |
955cbe7b | 143 | static Lisp_Object Qcopy_directory; |
8719abec CY |
144 | |
145 | /* Lisp function for recursively deleting directories. */ | |
955cbe7b | 146 | static Lisp_Object Qdelete_directory; |
8719abec | 147 | |
c1c4693e | 148 | #ifdef WINDOWSNT |
c1c4693e RS |
149 | #endif |
150 | ||
955cbe7b PE |
151 | Lisp_Object Qfile_error; |
152 | static Lisp_Object Qfile_already_exists, Qfile_date_error; | |
153 | static Lisp_Object Qexcl; | |
15c65264 RS |
154 | Lisp_Object Qfile_name_history; |
155 | ||
955cbe7b | 156 | static Lisp_Object Qcar_less_than_car; |
d6a3cc15 | 157 | |
f75d7a91 PE |
158 | static bool a_write (int, Lisp_Object, ptrdiff_t, ptrdiff_t, |
159 | Lisp_Object *, struct coding_system *); | |
160 | static bool e_write (int, Lisp_Object, ptrdiff_t, ptrdiff_t, | |
161 | struct coding_system *); | |
ce51c54c | 162 | |
ec7adf26 | 163 | \f |
5d01d666 | 164 | void |
971de7fb | 165 | report_file_error (const char *string, Lisp_Object data) |
570d7624 JB |
166 | { |
167 | Lisp_Object errstring; | |
505ab9bc | 168 | int errorno = errno; |
d7259fdb | 169 | char *str; |
570d7624 | 170 | |
ca9c0567 | 171 | synchronize_system_messages_locale (); |
d7259fdb | 172 | str = strerror (errorno); |
d7ea76b4 | 173 | errstring = code_convert_string_norecord (build_unibyte_string (str), |
68c45bf0 PE |
174 | Vlocale_coding_system, 0); |
175 | ||
570d7624 | 176 | while (1) |
505ab9bc RS |
177 | switch (errorno) |
178 | { | |
179 | case EEXIST: | |
24b1ddad | 180 | xsignal (Qfile_already_exists, Fcons (errstring, data)); |
505ab9bc RS |
181 | break; |
182 | default: | |
183 | /* System error messages are capitalized. Downcase the initial | |
39824137 EZ |
184 | unless it is followed by a slash. (The slash case caters to |
185 | error messages that begin with "I/O" or, in German, "E/A".) */ | |
d5443ffd KH |
186 | if (STRING_MULTIBYTE (errstring) |
187 | && ! EQ (Faref (errstring, make_number (1)), make_number ('/'))) | |
6c0969ca KH |
188 | { |
189 | int c; | |
190 | ||
51b59d79 | 191 | str = SSDATA (errstring); |
5976c3fe | 192 | c = STRING_CHAR ((unsigned char *) str); |
5da9919f | 193 | Faset (errstring, make_number (0), make_number (downcase (c))); |
6c0969ca | 194 | } |
505ab9bc | 195 | |
24b1ddad | 196 | xsignal (Qfile_error, |
505ab9bc RS |
197 | Fcons (build_string (string), Fcons (errstring, data))); |
198 | } | |
570d7624 | 199 | } |
b5148e85 | 200 | |
b27a1703 | 201 | Lisp_Object |
971de7fb | 202 | close_file_unwind (Lisp_Object fd) |
b5148e85 | 203 | { |
68c45bf0 | 204 | emacs_close (XFASTINT (fd)); |
b27a1703 | 205 | return Qnil; |
b5148e85 | 206 | } |
a1d2b64a RS |
207 | |
208 | /* Restore point, having saved it as a marker. */ | |
209 | ||
5dcde606 | 210 | Lisp_Object |
971de7fb | 211 | restore_point_unwind (Lisp_Object location) |
a1d2b64a | 212 | { |
ec7adf26 | 213 | Fgoto_char (location); |
a1d2b64a | 214 | Fset_marker (location, Qnil, Qnil); |
b27a1703 | 215 | return Qnil; |
a1d2b64a | 216 | } |
59c94f03 | 217 | |
570d7624 | 218 | \f |
955cbe7b PE |
219 | static Lisp_Object Qexpand_file_name; |
220 | static Lisp_Object Qsubstitute_in_file_name; | |
221 | static Lisp_Object Qdirectory_file_name; | |
222 | static Lisp_Object Qfile_name_directory; | |
223 | static Lisp_Object Qfile_name_nondirectory; | |
224 | static Lisp_Object Qunhandled_file_name_directory; | |
225 | static Lisp_Object Qfile_name_as_directory; | |
226 | static Lisp_Object Qcopy_file; | |
227 | static Lisp_Object Qmake_directory_internal; | |
228 | static Lisp_Object Qmake_directory; | |
229 | static Lisp_Object Qdelete_directory_internal; | |
32f4334d | 230 | Lisp_Object Qdelete_file; |
955cbe7b PE |
231 | static Lisp_Object Qrename_file; |
232 | static Lisp_Object Qadd_name_to_file; | |
233 | static Lisp_Object Qmake_symbolic_link; | |
32f4334d | 234 | Lisp_Object Qfile_exists_p; |
955cbe7b PE |
235 | static Lisp_Object Qfile_executable_p; |
236 | static Lisp_Object Qfile_readable_p; | |
237 | static Lisp_Object Qfile_writable_p; | |
238 | static Lisp_Object Qfile_symlink_p; | |
239 | static Lisp_Object Qaccess_file; | |
32f4334d | 240 | Lisp_Object Qfile_directory_p; |
955cbe7b PE |
241 | static Lisp_Object Qfile_regular_p; |
242 | static Lisp_Object Qfile_accessible_directory_p; | |
243 | static Lisp_Object Qfile_modes; | |
244 | static Lisp_Object Qset_file_modes; | |
245 | static Lisp_Object Qset_file_times; | |
246 | static Lisp_Object Qfile_selinux_context; | |
247 | static Lisp_Object Qset_file_selinux_context; | |
7c3d167f RF |
248 | static Lisp_Object Qfile_acl; |
249 | static Lisp_Object Qset_file_acl; | |
955cbe7b | 250 | static Lisp_Object Qfile_newer_than_file_p; |
32f4334d | 251 | Lisp_Object Qinsert_file_contents; |
3f011c7f | 252 | static Lisp_Object Qchoose_write_coding_system; |
32f4334d | 253 | Lisp_Object Qwrite_region; |
955cbe7b PE |
254 | static Lisp_Object Qverify_visited_file_modtime; |
255 | static Lisp_Object Qset_visited_file_modtime; | |
32f4334d | 256 | |
a7ca3326 | 257 | DEFUN ("find-file-name-handler", Ffind_file_name_handler, |
16a97296 | 258 | Sfind_file_name_handler, 2, 2, 0, |
8c1a1077 PJ |
259 | doc: /* Return FILENAME's handler function for OPERATION, if it has one. |
260 | Otherwise, return nil. | |
261 | A file name is handled if one of the regular expressions in | |
262 | `file-name-handler-alist' matches it. | |
263 | ||
264 | If OPERATION equals `inhibit-file-name-operation', then we ignore | |
265 | any handlers that are members of `inhibit-file-name-handlers', | |
266 | but we still do run any other handlers. This lets handlers | |
267 | use the standard functions without calling themselves recursively. */) | |
5842a27b | 268 | (Lisp_Object filename, Lisp_Object operation) |
32f4334d | 269 | { |
642ef245 | 270 | /* This function must not munge the match data. */ |
204ee271 | 271 | Lisp_Object chain, inhibited_handlers, result; |
d311d28c | 272 | ptrdiff_t pos = -1; |
642ef245 | 273 | |
204ee271 | 274 | result = Qnil; |
b7826503 | 275 | CHECK_STRING (filename); |
e4432095 | 276 | |
a65970a0 RS |
277 | if (EQ (operation, Vinhibit_file_name_operation)) |
278 | inhibited_handlers = Vinhibit_file_name_handlers; | |
279 | else | |
280 | inhibited_handlers = Qnil; | |
82c2d839 | 281 | |
93c30b5f | 282 | for (chain = Vfile_name_handler_alist; CONSP (chain); |
03699b14 | 283 | chain = XCDR (chain)) |
32f4334d RS |
284 | { |
285 | Lisp_Object elt; | |
03699b14 | 286 | elt = XCAR (chain); |
93c30b5f | 287 | if (CONSP (elt)) |
32f4334d | 288 | { |
f6c9b683 | 289 | Lisp_Object string = XCAR (elt); |
d311d28c | 290 | ptrdiff_t match_pos; |
f6c9b683 | 291 | Lisp_Object handler = XCDR (elt); |
68780e2a RS |
292 | Lisp_Object operations = Qnil; |
293 | ||
294 | if (SYMBOLP (handler)) | |
295 | operations = Fget (handler, Qoperations); | |
f6c9b683 | 296 | |
8d2ced53 | 297 | if (STRINGP (string) |
f6c9b683 RS |
298 | && (match_pos = fast_string_match (string, filename)) > pos |
299 | && (NILP (operations) || ! NILP (Fmemq (operation, operations)))) | |
a65970a0 | 300 | { |
f6c9b683 | 301 | Lisp_Object tem; |
a65970a0 | 302 | |
03699b14 | 303 | handler = XCDR (elt); |
a65970a0 RS |
304 | tem = Fmemq (handler, inhibited_handlers); |
305 | if (NILP (tem)) | |
8d2ced53 SM |
306 | { |
307 | result = handler; | |
308 | pos = match_pos; | |
309 | } | |
a65970a0 | 310 | } |
32f4334d | 311 | } |
642ef245 JB |
312 | |
313 | QUIT; | |
32f4334d | 314 | } |
8d2ced53 | 315 | return result; |
32f4334d RS |
316 | } |
317 | \f | |
a7ca3326 | 318 | DEFUN ("file-name-directory", Ffile_name_directory, Sfile_name_directory, |
8c1a1077 PJ |
319 | 1, 1, 0, |
320 | doc: /* Return the directory component in file name FILENAME. | |
321 | Return nil if FILENAME does not include a directory. | |
78379264 | 322 | Otherwise return a directory name. |
7c2fb837 | 323 | Given a Unix syntax file name, returns a string ending in slash. */) |
5842a27b | 324 | (Lisp_Object filename) |
570d7624 | 325 | { |
100c44b7 | 326 | #ifndef DOS_NT |
5976c3fe | 327 | register const char *beg; |
100c44b7 | 328 | #else |
5976c3fe | 329 | register char *beg; |
273ac8d1 | 330 | Lisp_Object tem_fn; |
100c44b7 | 331 | #endif |
5976c3fe | 332 | register const char *p; |
0bf2eed2 | 333 | Lisp_Object handler; |
570d7624 | 334 | |
b7826503 | 335 | CHECK_STRING (filename); |
570d7624 | 336 | |
0bf2eed2 RS |
337 | /* If the file name has special constructs in it, |
338 | call the corresponding file handler. */ | |
3b7f6e60 | 339 | handler = Ffind_file_name_handler (filename, Qfile_name_directory); |
0bf2eed2 | 340 | if (!NILP (handler)) |
2375c96a CY |
341 | { |
342 | Lisp_Object handled_name = call2 (handler, Qfile_name_directory, | |
343 | filename); | |
344 | return STRINGP (handled_name) ? handled_name : Qnil; | |
345 | } | |
0bf2eed2 | 346 | |
199607e4 | 347 | #ifdef DOS_NT |
38182d90 | 348 | beg = alloca (SBYTES (filename) + 1); |
5976c3fe | 349 | memcpy (beg, SSDATA (filename), SBYTES (filename) + 1); |
0f3f018c | 350 | #else |
5976c3fe | 351 | beg = SSDATA (filename); |
199607e4 | 352 | #endif |
d5db4077 | 353 | p = beg + SBYTES (filename); |
570d7624 | 354 | |
199607e4 | 355 | while (p != beg && !IS_DIRECTORY_SEP (p[-1]) |
199607e4 | 356 | #ifdef DOS_NT |
e1dbe924 | 357 | /* only recognize drive specifier at the beginning */ |
ba14e174 RS |
358 | && !(p[-1] == ':' |
359 | /* handle the "/:d:foo" and "/:foo" cases correctly */ | |
360 | && ((p == beg + 2 && !IS_DIRECTORY_SEP (*beg)) | |
361 | || (p == beg + 4 && IS_DIRECTORY_SEP (*beg)))) | |
199607e4 | 362 | #endif |
570d7624 JB |
363 | ) p--; |
364 | ||
365 | if (p == beg) | |
366 | return Qnil; | |
5e570b75 | 367 | #ifdef DOS_NT |
4c3c22f3 | 368 | /* Expansion of "c:" to drive and default directory. */ |
ba14e174 | 369 | if (p[-1] == ':') |
4c3c22f3 | 370 | { |
4c3c22f3 | 371 | /* MAXPATHLEN+1 is guaranteed to be enough space for getdefdir. */ |
5976c3fe PE |
372 | char *res = alloca (MAXPATHLEN + 1); |
373 | char *r = res; | |
ba14e174 RS |
374 | |
375 | if (p == beg + 4 && IS_DIRECTORY_SEP (*beg) && beg[1] == ':') | |
376 | { | |
e99a530f | 377 | memcpy (res, beg, 2); |
ba14e174 RS |
378 | beg += 2; |
379 | r += 2; | |
380 | } | |
381 | ||
620f13b0 | 382 | if (getdefdir (c_toupper (*beg) - 'A' + 1, r)) |
4c3c22f3 | 383 | { |
e7ac588e EZ |
384 | size_t l = strlen (res); |
385 | ||
386 | if (l > 3 || !IS_DIRECTORY_SEP (res[l - 1])) | |
4c3c22f3 RS |
387 | strcat (res, "/"); |
388 | beg = res; | |
389 | p = beg + strlen (beg); | |
e7ac588e | 390 | dostounix_filename (beg, 0); |
f5c81c80 EZ |
391 | tem_fn = make_specified_string (beg, -1, p - beg, |
392 | STRING_MULTIBYTE (filename)); | |
4c3c22f3 | 393 | } |
f5c81c80 EZ |
394 | else |
395 | tem_fn = make_specified_string (beg - 2, -1, p - beg + 2, | |
396 | STRING_MULTIBYTE (filename)); | |
397 | } | |
398 | else if (STRING_MULTIBYTE (filename)) | |
399 | { | |
e7ac588e EZ |
400 | tem_fn = make_specified_string (beg, -1, p - beg, 1); |
401 | dostounix_filename (SSDATA (tem_fn), 1); | |
402 | #ifdef WINDOWSNT | |
403 | if (!NILP (Vw32_downcase_file_names)) | |
404 | tem_fn = Fdowncase (tem_fn); | |
405 | #endif | |
f5c81c80 EZ |
406 | } |
407 | else | |
408 | { | |
e7ac588e | 409 | dostounix_filename (beg, 0); |
f5c81c80 | 410 | tem_fn = make_specified_string (beg, -1, p - beg, 0); |
4c3c22f3 | 411 | } |
f5c81c80 | 412 | return tem_fn; |
273ac8d1 | 413 | #else /* DOS_NT */ |
d7231f93 | 414 | return make_specified_string (beg, -1, p - beg, STRING_MULTIBYTE (filename)); |
273ac8d1 | 415 | #endif /* DOS_NT */ |
570d7624 JB |
416 | } |
417 | ||
a7ca3326 | 418 | DEFUN ("file-name-nondirectory", Ffile_name_nondirectory, |
60d67b83 | 419 | Sfile_name_nondirectory, 1, 1, 0, |
8c1a1077 PJ |
420 | doc: /* Return file name FILENAME sans its directory. |
421 | For example, in a Unix-syntax file name, | |
422 | this is everything after the last slash, | |
423 | or the entire name if it contains no slash. */) | |
5842a27b | 424 | (Lisp_Object filename) |
570d7624 | 425 | { |
5976c3fe | 426 | register const char *beg, *p, *end; |
0bf2eed2 | 427 | Lisp_Object handler; |
570d7624 | 428 | |
b7826503 | 429 | CHECK_STRING (filename); |
570d7624 | 430 | |
0bf2eed2 RS |
431 | /* If the file name has special constructs in it, |
432 | call the corresponding file handler. */ | |
3b7f6e60 | 433 | handler = Ffind_file_name_handler (filename, Qfile_name_nondirectory); |
0bf2eed2 | 434 | if (!NILP (handler)) |
2375c96a CY |
435 | { |
436 | Lisp_Object handled_name = call2 (handler, Qfile_name_nondirectory, | |
437 | filename); | |
438 | if (STRINGP (handled_name)) | |
439 | return handled_name; | |
440 | error ("Invalid handler in `file-name-handler-alist'"); | |
441 | } | |
0bf2eed2 | 442 | |
5976c3fe | 443 | beg = SSDATA (filename); |
d5db4077 | 444 | end = p = beg + SBYTES (filename); |
570d7624 | 445 | |
199607e4 | 446 | while (p != beg && !IS_DIRECTORY_SEP (p[-1]) |
199607e4 | 447 | #ifdef DOS_NT |
e1dbe924 | 448 | /* only recognize drive specifier at beginning */ |
ba14e174 RS |
449 | && !(p[-1] == ':' |
450 | /* handle the "/:d:foo" case correctly */ | |
451 | && (p == beg + 2 || (p == beg + 4 && IS_DIRECTORY_SEP (*beg)))) | |
199607e4 | 452 | #endif |
60d67b83 RS |
453 | ) |
454 | p--; | |
570d7624 | 455 | |
d7231f93 | 456 | return make_specified_string (p, -1, end - p, STRING_MULTIBYTE (filename)); |
570d7624 | 457 | } |
642ef245 | 458 | |
a7ca3326 | 459 | DEFUN ("unhandled-file-name-directory", Funhandled_file_name_directory, |
60d67b83 | 460 | Sunhandled_file_name_directory, 1, 1, 0, |
8c1a1077 PJ |
461 | doc: /* Return a directly usable directory name somehow associated with FILENAME. |
462 | A `directly usable' directory name is one that may be used without the | |
463 | intervention of any file handler. | |
464 | If FILENAME is a directly usable file itself, return | |
465 | \(file-name-directory FILENAME). | |
ca319910 SM |
466 | If FILENAME refers to a file which is not accessible from a local process, |
467 | then this should return nil. | |
8c1a1077 PJ |
468 | The `call-process' and `start-process' functions use this function to |
469 | get a current directory to run processes in. */) | |
5842a27b | 470 | (Lisp_Object filename) |
642ef245 JB |
471 | { |
472 | Lisp_Object handler; | |
473 | ||
474 | /* If the file name has special constructs in it, | |
475 | call the corresponding file handler. */ | |
49307295 | 476 | handler = Ffind_file_name_handler (filename, Qunhandled_file_name_directory); |
642ef245 | 477 | if (!NILP (handler)) |
2375c96a CY |
478 | { |
479 | Lisp_Object handled_name = call2 (handler, Qunhandled_file_name_directory, | |
480 | filename); | |
481 | return STRINGP (handled_name) ? handled_name : Qnil; | |
482 | } | |
642ef245 JB |
483 | |
484 | return Ffile_name_directory (filename); | |
485 | } | |
486 | ||
f5c81c80 EZ |
487 | /* Convert from file name SRC of length SRCLEN to directory name in |
488 | DST. MULTIBYTE non-zero means the file name in SRC is a multibyte | |
489 | string. On UNIX, just make sure there is a terminating /. Return | |
490 | the length of DST in bytes. */ | |
570d7624 | 491 | |
c293e30c | 492 | static ptrdiff_t |
f5c81c80 EZ |
493 | file_name_as_directory (char *dst, const char *src, ptrdiff_t srclen, |
494 | bool multibyte) | |
c293e30c DA |
495 | { |
496 | if (srclen == 0) | |
8aa3a244 | 497 | { |
c293e30c DA |
498 | dst[0] = '.'; |
499 | dst[1] = '/'; | |
500 | dst[2] = '\0'; | |
501 | return 2; | |
8aa3a244 RS |
502 | } |
503 | ||
c293e30c | 504 | strcpy (dst, src); |
93f4cf88 | 505 | |
c293e30c | 506 | if (!IS_DIRECTORY_SEP (dst[srclen - 1])) |
5e570b75 | 507 | { |
c293e30c DA |
508 | dst[srclen] = DIRECTORY_SEP; |
509 | dst[srclen + 1] = '\0'; | |
510 | srclen++; | |
5e570b75 | 511 | } |
199607e4 | 512 | #ifdef DOS_NT |
e7ac588e | 513 | dostounix_filename (dst, multibyte); |
199607e4 | 514 | #endif |
c293e30c | 515 | return srclen; |
570d7624 JB |
516 | } |
517 | ||
a7ca3326 | 518 | DEFUN ("file-name-as-directory", Ffile_name_as_directory, |
570d7624 | 519 | Sfile_name_as_directory, 1, 1, 0, |
0dac4f85 | 520 | doc: /* Return a string representing the file name FILE interpreted as a directory. |
8c1a1077 PJ |
521 | This operation exists because a directory is also a file, but its name as |
522 | a directory is different from its name as a file. | |
523 | The result can be used as the value of `default-directory' | |
524 | or passed as second argument to `expand-file-name'. | |
7c2fb837 | 525 | For a Unix-syntax file name, just appends a slash. */) |
5842a27b | 526 | (Lisp_Object file) |
570d7624 JB |
527 | { |
528 | char *buf; | |
c293e30c | 529 | ptrdiff_t length; |
0bf2eed2 | 530 | Lisp_Object handler; |
570d7624 | 531 | |
b7826503 | 532 | CHECK_STRING (file); |
265a9e55 | 533 | if (NILP (file)) |
570d7624 | 534 | return Qnil; |
0bf2eed2 RS |
535 | |
536 | /* If the file name has special constructs in it, | |
537 | call the corresponding file handler. */ | |
49307295 | 538 | handler = Ffind_file_name_handler (file, Qfile_name_as_directory); |
0bf2eed2 | 539 | if (!NILP (handler)) |
2375c96a CY |
540 | { |
541 | Lisp_Object handled_name = call2 (handler, Qfile_name_as_directory, | |
542 | file); | |
543 | if (STRINGP (handled_name)) | |
544 | return handled_name; | |
545 | error ("Invalid handler in `file-name-handler-alist'"); | |
546 | } | |
0bf2eed2 | 547 | |
e7ac588e EZ |
548 | #ifdef WINDOWSNT |
549 | if (!NILP (Vw32_downcase_file_names)) | |
550 | file = Fdowncase (file); | |
551 | #endif | |
38182d90 | 552 | buf = alloca (SBYTES (file) + 10); |
f5c81c80 EZ |
553 | length = file_name_as_directory (buf, SSDATA (file), SBYTES (file), |
554 | STRING_MULTIBYTE (file)); | |
c293e30c | 555 | return make_specified_string (buf, -1, length, STRING_MULTIBYTE (file)); |
570d7624 JB |
556 | } |
557 | \f | |
f5c81c80 EZ |
558 | /* Convert from directory name SRC of length SRCLEN to file name in |
559 | DST. MULTIBYTE non-zero means the file name in SRC is a multibyte | |
560 | string. On UNIX, just make sure there isn't a terminating /. | |
561 | Return the length of DST in bytes. */ | |
570d7624 | 562 | |
c293e30c | 563 | static ptrdiff_t |
f5c81c80 | 564 | directory_file_name (char *dst, char *src, ptrdiff_t srclen, bool multibyte) |
570d7624 | 565 | { |
570d7624 JB |
566 | /* Process as Unix format: just remove any final slash. |
567 | But leave "/" unchanged; do not change it to "". */ | |
568 | strcpy (dst, src); | |
c293e30c DA |
569 | if (srclen > 1 |
570 | && IS_DIRECTORY_SEP (dst[srclen - 1]) | |
4592782e | 571 | #ifdef DOS_NT |
c293e30c | 572 | && !IS_ANY_SEP (dst[srclen - 2]) |
4592782e RS |
573 | #endif |
574 | ) | |
c293e30c DA |
575 | { |
576 | dst[srclen - 1] = 0; | |
577 | srclen--; | |
578 | } | |
199607e4 | 579 | #ifdef DOS_NT |
e7ac588e | 580 | dostounix_filename (dst, multibyte); |
125feee8 | 581 | #endif |
c293e30c | 582 | return srclen; |
570d7624 JB |
583 | } |
584 | ||
a7ca3326 | 585 | DEFUN ("directory-file-name", Fdirectory_file_name, Sdirectory_file_name, |
8c1a1077 PJ |
586 | 1, 1, 0, |
587 | doc: /* Returns the file name of the directory named DIRECTORY. | |
588 | This is the name of the file that holds the data for the directory DIRECTORY. | |
589 | This operation exists because a directory is also a file, but its name as | |
590 | a directory is different from its name as a file. | |
7c2fb837 | 591 | In Unix-syntax, this function just removes the final slash. */) |
5842a27b | 592 | (Lisp_Object directory) |
570d7624 JB |
593 | { |
594 | char *buf; | |
c293e30c | 595 | ptrdiff_t length; |
0bf2eed2 | 596 | Lisp_Object handler; |
570d7624 | 597 | |
b7826503 | 598 | CHECK_STRING (directory); |
570d7624 | 599 | |
265a9e55 | 600 | if (NILP (directory)) |
570d7624 | 601 | return Qnil; |
0bf2eed2 RS |
602 | |
603 | /* If the file name has special constructs in it, | |
604 | call the corresponding file handler. */ | |
49307295 | 605 | handler = Ffind_file_name_handler (directory, Qdirectory_file_name); |
0bf2eed2 | 606 | if (!NILP (handler)) |
2375c96a CY |
607 | { |
608 | Lisp_Object handled_name = call2 (handler, Qdirectory_file_name, | |
609 | directory); | |
610 | if (STRINGP (handled_name)) | |
611 | return handled_name; | |
612 | error ("Invalid handler in `file-name-handler-alist'"); | |
613 | } | |
0bf2eed2 | 614 | |
e7ac588e EZ |
615 | #ifdef WINDOWSNT |
616 | if (!NILP (Vw32_downcase_file_names)) | |
617 | directory = Fdowncase (directory); | |
618 | #endif | |
38182d90 | 619 | buf = alloca (SBYTES (directory) + 20); |
f5c81c80 EZ |
620 | length = directory_file_name (buf, SSDATA (directory), SBYTES (directory), |
621 | STRING_MULTIBYTE (directory)); | |
c293e30c | 622 | return make_specified_string (buf, -1, length, STRING_MULTIBYTE (directory)); |
570d7624 JB |
623 | } |
624 | ||
91433552 | 625 | static const char make_temp_name_tbl[64] = |
3ce839e4 RS |
626 | { |
627 | 'A','B','C','D','E','F','G','H', | |
628 | 'I','J','K','L','M','N','O','P', | |
629 | 'Q','R','S','T','U','V','W','X', | |
630 | 'Y','Z','a','b','c','d','e','f', | |
631 | 'g','h','i','j','k','l','m','n', | |
632 | 'o','p','q','r','s','t','u','v', | |
633 | 'w','x','y','z','0','1','2','3', | |
634 | '4','5','6','7','8','9','-','_' | |
635 | }; | |
cb613bb8 | 636 | |
3ce839e4 RS |
637 | static unsigned make_temp_name_count, make_temp_name_count_initialized_p; |
638 | ||
cb613bb8 | 639 | /* Value is a temporary file name starting with PREFIX, a string. |
efdc16c9 | 640 | |
cb613bb8 GM |
641 | The Emacs process number forms part of the result, so there is |
642 | no danger of generating a name being used by another process. | |
643 | In addition, this function makes an attempt to choose a name | |
644 | which has no existing file. To make this work, PREFIX should be | |
645 | an absolute file name. | |
efdc16c9 | 646 | |
f75d7a91 | 647 | BASE64_P means add the pid as 3 characters in base64 |
cb613bb8 GM |
648 | encoding. In this case, 6 characters will be added to PREFIX to |
649 | form the file name. Otherwise, if Emacs is running on a system | |
650 | with long file names, add the pid as a decimal number. | |
651 | ||
652 | This function signals an error if no unique file name could be | |
653 | generated. */ | |
654 | ||
655 | Lisp_Object | |
f75d7a91 | 656 | make_temp_name (Lisp_Object prefix, bool base64_p) |
570d7624 JB |
657 | { |
658 | Lisp_Object val; | |
0cedd530 | 659 | int len, clen; |
a81d11a3 | 660 | printmax_t pid; |
5976c3fe | 661 | char *p, *data; |
a81d11a3 | 662 | char pidbuf[INT_BUFSIZE_BOUND (printmax_t)]; |
3ce839e4 | 663 | int pidlen; |
efdc16c9 | 664 | |
b7826503 | 665 | CHECK_STRING (prefix); |
3ce839e4 RS |
666 | |
667 | /* VAL is created by adding 6 characters to PREFIX. The first | |
668 | three are the PID of this process, in base 64, and the second | |
669 | three are incremented if the file already exists. This ensures | |
670 | 262144 unique file names per PID per PREFIX. */ | |
671 | ||
93f4cf88 | 672 | pid = getpid (); |
3ce839e4 | 673 | |
cb613bb8 GM |
674 | if (base64_p) |
675 | { | |
676 | pidbuf[0] = make_temp_name_tbl[pid & 63], pid >>= 6; | |
677 | pidbuf[1] = make_temp_name_tbl[pid & 63], pid >>= 6; | |
678 | pidbuf[2] = make_temp_name_tbl[pid & 63], pid >>= 6; | |
679 | pidlen = 3; | |
680 | } | |
681 | else | |
682 | { | |
3ce839e4 | 683 | #ifdef HAVE_LONG_FILE_NAMES |
a81d11a3 | 684 | pidlen = sprintf (pidbuf, "%"pMd, pid); |
3a3bfb18 | 685 | #else |
cb613bb8 GM |
686 | pidbuf[0] = make_temp_name_tbl[pid & 63], pid >>= 6; |
687 | pidbuf[1] = make_temp_name_tbl[pid & 63], pid >>= 6; | |
688 | pidbuf[2] = make_temp_name_tbl[pid & 63], pid >>= 6; | |
689 | pidlen = 3; | |
3ce839e4 | 690 | #endif |
cb613bb8 | 691 | } |
efdc16c9 | 692 | |
0cedd530 SM |
693 | len = SBYTES (prefix); clen = SCHARS (prefix); |
694 | val = make_uninit_multibyte_string (clen + 3 + pidlen, len + 3 + pidlen); | |
695 | if (!STRING_MULTIBYTE (prefix)) | |
696 | STRING_SET_UNIBYTE (val); | |
5976c3fe PE |
697 | data = SSDATA (val); |
698 | memcpy (data, SSDATA (prefix), len); | |
3ce839e4 RS |
699 | p = data + len; |
700 | ||
72af86bd | 701 | memcpy (p, pidbuf, pidlen); |
3ce839e4 RS |
702 | p += pidlen; |
703 | ||
704 | /* Here we try to minimize useless stat'ing when this function is | |
705 | invoked many times successively with the same PREFIX. We achieve | |
706 | this by initializing count to a random value, and incrementing it | |
f6a492a9 RS |
707 | afterwards. |
708 | ||
709 | We don't want make-temp-name to be called while dumping, | |
710 | because then make_temp_name_count_initialized_p would get set | |
711 | and then make_temp_name_count would not be set when Emacs starts. */ | |
712 | ||
3ce839e4 RS |
713 | if (!make_temp_name_count_initialized_p) |
714 | { | |
327eeec8 | 715 | make_temp_name_count = time (NULL); |
3ce839e4 RS |
716 | make_temp_name_count_initialized_p = 1; |
717 | } | |
718 | ||
719 | while (1) | |
720 | { | |
8a7777fc | 721 | unsigned num = make_temp_name_count; |
3ce839e4 RS |
722 | |
723 | p[0] = make_temp_name_tbl[num & 63], num >>= 6; | |
724 | p[1] = make_temp_name_tbl[num & 63], num >>= 6; | |
725 | p[2] = make_temp_name_tbl[num & 63], num >>= 6; | |
726 | ||
8a7777fc RS |
727 | /* Poor man's congruential RN generator. Replace with |
728 | ++make_temp_name_count for debugging. */ | |
729 | make_temp_name_count += 25229; | |
730 | make_temp_name_count %= 225307; | |
731 | ||
bb385a92 | 732 | if (!check_existing (data)) |
3ce839e4 RS |
733 | { |
734 | /* We want to return only if errno is ENOENT. */ | |
735 | if (errno == ENOENT) | |
736 | return val; | |
737 | else | |
738 | /* The error here is dubious, but there is little else we | |
739 | can do. The alternatives are to return nil, which is | |
740 | as bad as (and in many cases worse than) throwing the | |
741 | error, or to ignore the error, which will likely result | |
8a7777fc | 742 | in looping through 225307 stat's, which is not only |
410ed5c3 PE |
743 | dog-slow, but also useless since eventually nil would |
744 | have to be returned anyway. */ | |
9869bb0b | 745 | report_file_error ("Cannot create temporary name for prefix", |
3ce839e4 RS |
746 | Fcons (prefix, Qnil)); |
747 | /* not reached */ | |
748 | } | |
749 | } | |
570d7624 | 750 | } |
3ce839e4 | 751 | |
cb613bb8 GM |
752 | |
753 | DEFUN ("make-temp-name", Fmake_temp_name, Smake_temp_name, 1, 1, 0, | |
8c1a1077 PJ |
754 | doc: /* Generate temporary file name (string) starting with PREFIX (a string). |
755 | The Emacs process number forms part of the result, | |
756 | so there is no danger of generating a name being used by another process. | |
757 | ||
758 | In addition, this function makes an attempt to choose a name | |
759 | which has no existing file. To make this work, | |
760 | PREFIX should be an absolute file name. | |
761 | ||
762 | There is a race condition between calling `make-temp-name' and creating the | |
763 | file which opens all kinds of security holes. For that reason, you should | |
f9e6f049 RS |
764 | probably use `make-temp-file' instead, except in three circumstances: |
765 | ||
766 | * If you are creating the file in the user's home directory. | |
767 | * If you are creating a directory rather than an ordinary file. | |
768 | * If you are taking special precautions as `make-temp-file' does. */) | |
5842a27b | 769 | (Lisp_Object prefix) |
cb613bb8 GM |
770 | { |
771 | return make_temp_name (prefix, 0); | |
772 | } | |
773 | ||
774 | ||
570d7624 | 775 | \f |
a7ca3326 | 776 | DEFUN ("expand-file-name", Fexpand_file_name, Sexpand_file_name, 1, 2, 0, |
8c1a1077 PJ |
777 | doc: /* Convert filename NAME to absolute, and canonicalize it. |
778 | Second arg DEFAULT-DIRECTORY is directory to start with if NAME is relative | |
78379264 | 779 | \(does not start with slash or tilde); if DEFAULT-DIRECTORY is nil or missing, |
a4e03fe5 | 780 | the current buffer's value of `default-directory' is used. |
1b2a627f EZ |
781 | NAME should be a string that is a valid file name for the underlying |
782 | filesystem. | |
8c1a1077 PJ |
783 | File name components that are `.' are removed, and |
784 | so are file name components followed by `..', along with the `..' itself; | |
785 | note that these simplifications are done without checking the resulting | |
786 | file names in the file system. | |
15579471 EZ |
787 | Multiple consecutive slashes are collapsed into a single slash, |
788 | except at the beginning of the file name when they are significant (e.g., | |
789 | UNC file names on MS-Windows.) | |
8c1a1077 PJ |
790 | An initial `~/' expands to your home directory. |
791 | An initial `~USER/' expands to USER's home directory. | |
07114296 CY |
792 | See also the function `substitute-in-file-name'. |
793 | ||
794 | For technical reasons, this function can return correct but | |
795 | non-intuitive results for the root directory; for instance, | |
796 | \(expand-file-name ".." "/") returns "/..". For this reason, use | |
15579471 | 797 | \(directory-file-name (file-name-directory dirname)) to traverse a |
07114296 | 798 | filesystem tree, not (expand-file-name ".." dirname). */) |
5842a27b | 799 | (Lisp_Object name, Lisp_Object default_directory) |
570d7624 | 800 | { |
5b5a2ea1 SM |
801 | /* These point to SDATA and need to be careful with string-relocation |
802 | during GC (via DECODE_FILE). */ | |
2893f146 PE |
803 | char *nm; |
804 | const char *newdir; | |
5b5a2ea1 | 805 | /* This should only point to alloca'd data. */ |
5976c3fe | 806 | char *target; |
199607e4 | 807 | |
93f4cf88 | 808 | ptrdiff_t tlen; |
570d7624 | 809 | struct passwd *pw; |
5e570b75 | 810 | #ifdef DOS_NT |
199607e4 | 811 | int drive = 0; |
f75d7a91 PE |
812 | bool collapse_newdir = 1; |
813 | bool is_escaped = 0; | |
5e570b75 | 814 | #endif /* DOS_NT */ |
93f4cf88 | 815 | ptrdiff_t length; |
2375c96a | 816 | Lisp_Object handler, result, handled_name; |
fce31d69 | 817 | bool multibyte; |
9c06a1f3 | 818 | Lisp_Object hdir; |
199607e4 | 819 | |
b7826503 | 820 | CHECK_STRING (name); |
570d7624 | 821 | |
0bf2eed2 RS |
822 | /* If the file name has special constructs in it, |
823 | call the corresponding file handler. */ | |
49307295 | 824 | handler = Ffind_file_name_handler (name, Qexpand_file_name); |
0bf2eed2 | 825 | if (!NILP (handler)) |
2375c96a CY |
826 | { |
827 | handled_name = call3 (handler, Qexpand_file_name, | |
828 | name, default_directory); | |
829 | if (STRINGP (handled_name)) | |
830 | return handled_name; | |
831 | error ("Invalid handler in `file-name-handler-alist'"); | |
832 | } | |
833 | ||
58fc9587 | 834 | |
3b7f6e60 EN |
835 | /* Use the buffer's default-directory if DEFAULT_DIRECTORY is omitted. */ |
836 | if (NILP (default_directory)) | |
4b4deea2 | 837 | default_directory = BVAR (current_buffer, directory); |
82330e7f | 838 | if (! STRINGP (default_directory)) |
dd693537 EZ |
839 | { |
840 | #ifdef DOS_NT | |
841 | /* "/" is not considered a root directory on DOS_NT, so using "/" | |
842 | here causes an infinite recursion in, e.g., the following: | |
843 | ||
844 | (let (default-directory) | |
845 | (expand-file-name "a")) | |
846 | ||
847 | To avoid this, we set default_directory to the root of the | |
848 | current drive. */ | |
dd693537 EZ |
849 | default_directory = build_string (emacs_root_dir ()); |
850 | #else | |
851 | default_directory = build_string ("/"); | |
852 | #endif | |
853 | } | |
58fc9587 | 854 | |
3b7f6e60 | 855 | if (!NILP (default_directory)) |
273e0829 | 856 | { |
3b7f6e60 | 857 | handler = Ffind_file_name_handler (default_directory, Qexpand_file_name); |
273e0829 | 858 | if (!NILP (handler)) |
2375c96a CY |
859 | { |
860 | handled_name = call3 (handler, Qexpand_file_name, | |
861 | name, default_directory); | |
862 | if (STRINGP (handled_name)) | |
863 | return handled_name; | |
864 | error ("Invalid handler in `file-name-handler-alist'"); | |
865 | } | |
273e0829 | 866 | } |
0bf2eed2 | 867 | |
5b5a2ea1 | 868 | { |
5976c3fe | 869 | char *o = SSDATA (default_directory); |
5b5a2ea1 SM |
870 | |
871 | /* Make sure DEFAULT_DIRECTORY is properly expanded. | |
872 | It would be better to do this down below where we actually use | |
873 | default_directory. Unfortunately, calling Fexpand_file_name recursively | |
874 | could invoke GC, and the strings might be relocated. This would | |
875 | be annoying because we have pointers into strings lying around | |
876 | that would need adjusting, and people would add new pointers to | |
877 | the code and forget to adjust them, resulting in intermittent bugs. | |
878 | Putting this call here avoids all that crud. | |
879 | ||
880 | The EQ test avoids infinite recursion. */ | |
881 | if (! NILP (default_directory) && !EQ (default_directory, name) | |
882 | /* Save time in some common cases - as long as default_directory | |
883 | is not relative, it can be canonicalized with name below (if it | |
884 | is needed at all) without requiring it to be expanded now. */ | |
01937013 | 885 | #ifdef DOS_NT |
5b5a2ea1 SM |
886 | /* Detect MSDOS file names with drive specifiers. */ |
887 | && ! (IS_DRIVE (o[0]) && IS_DEVICE_SEP (o[1]) | |
888 | && IS_DIRECTORY_SEP (o[2])) | |
199607e4 | 889 | #ifdef WINDOWSNT |
5b5a2ea1 SM |
890 | /* Detect Windows file names in UNC format. */ |
891 | && ! (IS_DIRECTORY_SEP (o[0]) && IS_DIRECTORY_SEP (o[1])) | |
01937013 | 892 | #endif |
199607e4 RS |
893 | #else /* not DOS_NT */ |
894 | /* Detect Unix absolute file names (/... alone is not absolute on | |
895 | DOS or Windows). */ | |
5b5a2ea1 | 896 | && ! (IS_DIRECTORY_SEP (o[0])) |
199607e4 | 897 | #endif /* not DOS_NT */ |
5b5a2ea1 SM |
898 | ) |
899 | { | |
900 | struct gcpro gcpro1; | |
f14b1c68 | 901 | |
5b5a2ea1 SM |
902 | GCPRO1 (name); |
903 | default_directory = Fexpand_file_name (default_directory, Qnil); | |
904 | UNGCPRO; | |
905 | } | |
906 | } | |
2b046a72 | 907 | multibyte = STRING_MULTIBYTE (name); |
6d060996 KH |
908 | if (multibyte != STRING_MULTIBYTE (default_directory)) |
909 | { | |
910 | if (multibyte) | |
911 | default_directory = string_to_multibyte (default_directory); | |
912 | else | |
913 | { | |
914 | name = string_to_multibyte (name); | |
915 | multibyte = 1; | |
916 | } | |
917 | } | |
918 | ||
e7ac588e EZ |
919 | #ifdef WINDOWSNT |
920 | if (!NILP (Vw32_downcase_file_names)) | |
921 | default_directory = Fdowncase (default_directory); | |
922 | #endif | |
923 | ||
e8d32c7e | 924 | /* Make a local copy of nm[] to protect it from GC in DECODE_FILE below. */ |
38182d90 | 925 | nm = alloca (SBYTES (name) + 1); |
5976c3fe | 926 | memcpy (nm, SSDATA (name), SBYTES (name) + 1); |
199607e4 | 927 | |
565f0b98 | 928 | #ifdef DOS_NT |
f0f95d31 RS |
929 | /* Note if special escape prefix is present, but remove for now. */ |
930 | if (nm[0] == '/' && nm[1] == ':') | |
931 | { | |
932 | is_escaped = 1; | |
933 | nm += 2; | |
934 | } | |
935 | ||
199607e4 | 936 | /* Find and remove drive specifier if present; this makes nm absolute |
f0f95d31 RS |
937 | even if the rest of the name appears to be relative. Only look for |
938 | drive specifier at the beginning. */ | |
939 | if (IS_DRIVE (nm[0]) && IS_DEVICE_SEP (nm[1])) | |
940 | { | |
5976c3fe | 941 | drive = (unsigned char) nm[0]; |
f0f95d31 RS |
942 | nm += 2; |
943 | } | |
bb1ff1f4 GV |
944 | |
945 | #ifdef WINDOWSNT | |
946 | /* If we see "c://somedir", we want to strip the first slash after the | |
947 | colon when stripping the drive letter. Otherwise, this expands to | |
948 | "//somedir". */ | |
949 | if (drive && IS_DIRECTORY_SEP (nm[0]) && IS_DIRECTORY_SEP (nm[1])) | |
950 | nm++; | |
4c3c22f3 | 951 | |
e8d32c7e | 952 | /* Discard any previous drive specifier if nm is now in UNC format. */ |
199607e4 RS |
953 | if (IS_DIRECTORY_SEP (nm[0]) && IS_DIRECTORY_SEP (nm[1])) |
954 | { | |
955 | drive = 0; | |
956 | } | |
5b5a2ea1 SM |
957 | #endif /* WINDOWSNT */ |
958 | #endif /* DOS_NT */ | |
199607e4 | 959 | |
214378ec GM |
960 | /* If nm is absolute, look for `/./' or `/../' or `//''sequences; if |
961 | none are found, we can probably return right away. We will avoid | |
962 | allocating a new string if name is already fully expanded. */ | |
570d7624 | 963 | if ( |
5e570b75 | 964 | IS_DIRECTORY_SEP (nm[0]) |
199607e4 | 965 | #ifdef MSDOS |
f0f95d31 | 966 | && drive && !is_escaped |
199607e4 RS |
967 | #endif |
968 | #ifdef WINDOWSNT | |
f0f95d31 | 969 | && (drive || IS_DIRECTORY_SEP (nm[1])) && !is_escaped |
199607e4 | 970 | #endif |
570d7624 JB |
971 | ) |
972 | { | |
f14b1c68 JB |
973 | /* If it turns out that the filename we want to return is just a |
974 | suffix of FILENAME, we don't need to go through and edit | |
975 | things; we just need to construct a new string using data | |
f75d7a91 PE |
976 | starting at the middle of FILENAME. If we set LOSE, that |
977 | means we've discovered that we can't do that cool trick. */ | |
978 | bool lose = 0; | |
5976c3fe | 979 | char *p = nm; |
f14b1c68 | 980 | |
570d7624 JB |
981 | while (*p) |
982 | { | |
199607e4 | 983 | /* Since we know the name is absolute, we can assume that each |
c77d647e JB |
984 | element starts with a "/". */ |
985 | ||
c77d647e | 986 | /* "." and ".." are hairy. */ |
5e570b75 | 987 | if (IS_DIRECTORY_SEP (p[0]) |
c77d647e | 988 | && p[1] == '.' |
5e570b75 | 989 | && (IS_DIRECTORY_SEP (p[2]) |
c77d647e | 990 | || p[2] == 0 |
5e570b75 | 991 | || (p[2] == '.' && (IS_DIRECTORY_SEP (p[3]) |
c77d647e | 992 | || p[3] == 0)))) |
570d7624 | 993 | lose = 1; |
214378ec GM |
994 | /* We want to replace multiple `/' in a row with a single |
995 | slash. */ | |
996 | else if (p > nm | |
997 | && IS_DIRECTORY_SEP (p[0]) | |
998 | && IS_DIRECTORY_SEP (p[1])) | |
999 | lose = 1; | |
570d7624 JB |
1000 | p++; |
1001 | } | |
1002 | if (!lose) | |
1003 | { | |
199607e4 | 1004 | #ifdef DOS_NT |
087fc47a JB |
1005 | /* Make sure directories are all separated with /, but |
1006 | avoid allocation of a new string when not required. */ | |
e7ac588e | 1007 | dostounix_filename (nm, multibyte); |
199607e4 RS |
1008 | #ifdef WINDOWSNT |
1009 | if (IS_DIRECTORY_SEP (nm[1])) | |
1010 | { | |
42a5b22f | 1011 | if (strcmp (nm, SSDATA (name)) != 0) |
2b046a72 | 1012 | name = make_specified_string (nm, -1, strlen (nm), multibyte); |
199607e4 RS |
1013 | } |
1014 | else | |
1015 | #endif | |
e8d32c7e | 1016 | /* Drive must be set, so this is okay. */ |
5976c3fe | 1017 | if (strcmp (nm - 2, SSDATA (name)) != 0) |
199607e4 | 1018 | { |
3f817c73 KH |
1019 | char temp[] = " :"; |
1020 | ||
2b046a72 | 1021 | name = make_specified_string (nm, -1, p - nm, multibyte); |
3f817c73 KH |
1022 | temp[0] = DRIVE_LETTER (drive); |
1023 | name = concat2 (build_string (temp), name); | |
199607e4 | 1024 | } |
e7ac588e EZ |
1025 | #ifdef WINDOWSNT |
1026 | if (!NILP (Vw32_downcase_file_names)) | |
1027 | name = Fdowncase (name); | |
1028 | #endif | |
199607e4 RS |
1029 | return name; |
1030 | #else /* not DOS_NT */ | |
42a5b22f | 1031 | if (strcmp (nm, SSDATA (name)) == 0) |
570d7624 | 1032 | return name; |
2b046a72 | 1033 | return make_specified_string (nm, -1, strlen (nm), multibyte); |
5e570b75 | 1034 | #endif /* not DOS_NT */ |
570d7624 JB |
1035 | } |
1036 | } | |
1037 | ||
199607e4 RS |
1038 | /* At this point, nm might or might not be an absolute file name. We |
1039 | need to expand ~ or ~user if present, otherwise prefix nm with | |
1040 | default_directory if nm is not absolute, and finally collapse /./ | |
1041 | and /foo/../ sequences. | |
1042 | ||
1043 | We set newdir to be the appropriate prefix if one is needed: | |
1044 | - the relevant user directory if nm starts with ~ or ~user | |
1045 | - the specified drive's working dir (DOS/NT only) if nm does not | |
1046 | start with / | |
1047 | - the value of default_directory. | |
1048 | ||
1049 | Note that these prefixes are not guaranteed to be absolute (except | |
1050 | for the working dir of a drive). Therefore, to ensure we always | |
1051 | return an absolute name, if the final prefix is not absolute we | |
1052 | append it to the current working directory. */ | |
570d7624 JB |
1053 | |
1054 | newdir = 0; | |
1055 | ||
1056 | if (nm[0] == '~') /* prefix ~ */ | |
c77d647e | 1057 | { |
5e570b75 | 1058 | if (IS_DIRECTORY_SEP (nm[1]) |
c77d647e JB |
1059 | || nm[1] == 0) /* ~ by itself */ |
1060 | { | |
6d557778 EZ |
1061 | Lisp_Object tem; |
1062 | ||
5976c3fe PE |
1063 | if (!(newdir = egetenv ("HOME"))) |
1064 | newdir = ""; | |
199607e4 | 1065 | nm++; |
e8d32c7e | 1066 | /* `egetenv' may return a unibyte string, which will bite us since |
6d557778 | 1067 | we expect the directory to be multibyte. */ |
9c06a1f3 | 1068 | tem = build_string (newdir); |
f5c81c80 | 1069 | if (multibyte && !STRING_MULTIBYTE (tem)) |
9c06a1f3 EZ |
1070 | { |
1071 | hdir = DECODE_FILE (tem); | |
5976c3fe | 1072 | newdir = SSDATA (hdir); |
9c06a1f3 | 1073 | } |
5e570b75 | 1074 | #ifdef DOS_NT |
9a1dc3be | 1075 | collapse_newdir = 0; |
4c3c22f3 | 1076 | #endif |
c77d647e JB |
1077 | } |
1078 | else /* ~user/filename */ | |
1079 | { | |
5976c3fe | 1080 | char *o, *p; |
7c2fb837 | 1081 | for (p = nm; *p && (!IS_DIRECTORY_SEP (*p)); p++); |
5b5a2ea1 | 1082 | o = alloca (p - nm + 1); |
72af86bd | 1083 | memcpy (o, nm, p - nm); |
c77d647e JB |
1084 | o [p - nm] = 0; |
1085 | ||
4d7e6e51 | 1086 | block_input (); |
350e0088 | 1087 | pw = getpwnam (o + 1); |
4d7e6e51 | 1088 | unblock_input (); |
c77d647e JB |
1089 | if (pw) |
1090 | { | |
f5c81c80 EZ |
1091 | Lisp_Object tem; |
1092 | ||
5976c3fe | 1093 | newdir = pw->pw_dir; |
f5c81c80 EZ |
1094 | /* `getpwnam' may return a unibyte string, which will |
1095 | bite us since we expect the directory to be | |
1096 | multibyte. */ | |
1097 | tem = build_string (newdir); | |
1098 | if (multibyte && !STRING_MULTIBYTE (tem)) | |
1099 | { | |
1100 | hdir = DECODE_FILE (tem); | |
1101 | newdir = SSDATA (hdir); | |
1102 | } | |
c77d647e | 1103 | nm = p; |
199607e4 | 1104 | #ifdef DOS_NT |
9a1dc3be | 1105 | collapse_newdir = 0; |
199607e4 | 1106 | #endif |
c77d647e | 1107 | } |
e5d77022 | 1108 | |
c77d647e JB |
1109 | /* If we don't find a user of that name, leave the name |
1110 | unchanged; don't move nm forward to p. */ | |
1111 | } | |
1112 | } | |
570d7624 | 1113 | |
5e570b75 | 1114 | #ifdef DOS_NT |
199607e4 RS |
1115 | /* On DOS and Windows, nm is absolute if a drive name was specified; |
1116 | use the drive's current directory as the prefix if needed. */ | |
1117 | if (!newdir && drive) | |
1118 | { | |
e8d32c7e | 1119 | /* Get default directory if needed to make nm absolute. */ |
2893f146 | 1120 | char *adir = NULL; |
199607e4 RS |
1121 | if (!IS_DIRECTORY_SEP (nm[0])) |
1122 | { | |
2893f146 | 1123 | adir = alloca (MAXPATHLEN + 1); |
620f13b0 | 1124 | if (!getdefdir (c_toupper (drive) - 'A' + 1, adir)) |
2893f146 | 1125 | adir = NULL; |
f5c81c80 EZ |
1126 | else if (multibyte) |
1127 | { | |
1128 | Lisp_Object tem = build_string (adir); | |
1129 | ||
1130 | tem = DECODE_FILE (tem); | |
1131 | memcpy (adir, SSDATA (tem), SBYTES (tem) + 1); | |
1132 | } | |
199607e4 | 1133 | } |
2893f146 | 1134 | if (!adir) |
199607e4 | 1135 | { |
e8d32c7e | 1136 | /* Either nm starts with /, or drive isn't mounted. */ |
2893f146 PE |
1137 | adir = alloca (4); |
1138 | adir[0] = DRIVE_LETTER (drive); | |
1139 | adir[1] = ':'; | |
1140 | adir[2] = '/'; | |
1141 | adir[3] = 0; | |
199607e4 | 1142 | } |
2893f146 | 1143 | newdir = adir; |
199607e4 | 1144 | } |
5e570b75 | 1145 | #endif /* DOS_NT */ |
199607e4 RS |
1146 | |
1147 | /* Finally, if no prefix has been specified and nm is not absolute, | |
e8d32c7e | 1148 | then it must be expanded relative to default_directory. */ |
199607e4 | 1149 | |
34097368 | 1150 | if (1 |
199607e4 | 1151 | #ifndef DOS_NT |
e8d32c7e | 1152 | /* /... alone is not absolute on DOS and Windows. */ |
34097368 | 1153 | && !IS_DIRECTORY_SEP (nm[0]) |
199607e4 RS |
1154 | #endif |
1155 | #ifdef WINDOWSNT | |
34097368 | 1156 | && !(IS_DIRECTORY_SEP (nm[0]) && IS_DIRECTORY_SEP (nm[1])) |
199607e4 | 1157 | #endif |
570d7624 JB |
1158 | && !newdir) |
1159 | { | |
5976c3fe | 1160 | newdir = SSDATA (default_directory); |
f0f95d31 RS |
1161 | #ifdef DOS_NT |
1162 | /* Note if special escape prefix is present, but remove for now. */ | |
1163 | if (newdir[0] == '/' && newdir[1] == ':') | |
1164 | { | |
1165 | is_escaped = 1; | |
1166 | newdir += 2; | |
1167 | } | |
1168 | #endif | |
570d7624 JB |
1169 | } |
1170 | ||
5e570b75 | 1171 | #ifdef DOS_NT |
199607e4 RS |
1172 | if (newdir) |
1173 | { | |
e8d32c7e | 1174 | /* First ensure newdir is an absolute name. */ |
199607e4 RS |
1175 | if ( |
1176 | /* Detect MSDOS file names with drive specifiers. */ | |
1177 | ! (IS_DRIVE (newdir[0]) | |
1178 | && IS_DEVICE_SEP (newdir[1]) && IS_DIRECTORY_SEP (newdir[2])) | |
1179 | #ifdef WINDOWSNT | |
1180 | /* Detect Windows file names in UNC format. */ | |
1181 | && ! (IS_DIRECTORY_SEP (newdir[0]) && IS_DIRECTORY_SEP (newdir[1])) | |
1182 | #endif | |
1183 | ) | |
1184 | { | |
1185 | /* Effectively, let newdir be (expand-file-name newdir cwd). | |
1186 | Because of the admonition against calling expand-file-name | |
1187 | when we have pointers into lisp strings, we accomplish this | |
1188 | indirectly by prepending newdir to nm if necessary, and using | |
e8d32c7e | 1189 | cwd (or the wd of newdir's drive) as the new newdir. */ |
2893f146 | 1190 | char *adir; |
f5c81c80 | 1191 | |
c70a4df6 | 1192 | if (IS_DRIVE (newdir[0]) && IS_DEVICE_SEP (newdir[1])) |
199607e4 | 1193 | { |
5976c3fe | 1194 | drive = (unsigned char) newdir[0]; |
199607e4 RS |
1195 | newdir += 2; |
1196 | } | |
1197 | if (!IS_DIRECTORY_SEP (nm[0])) | |
1198 | { | |
c293e30c DA |
1199 | ptrdiff_t newlen = strlen (newdir); |
1200 | char *tmp = alloca (newlen + strlen (nm) + 2); | |
f5c81c80 | 1201 | file_name_as_directory (tmp, newdir, newlen, multibyte); |
199607e4 RS |
1202 | strcat (tmp, nm); |
1203 | nm = tmp; | |
1204 | } | |
2893f146 | 1205 | adir = alloca (MAXPATHLEN + 1); |
199607e4 RS |
1206 | if (drive) |
1207 | { | |
620f13b0 | 1208 | if (!getdefdir (c_toupper (drive) - 'A' + 1, adir)) |
f5c81c80 | 1209 | strcpy (adir, "/"); |
199607e4 RS |
1210 | } |
1211 | else | |
9239d970 | 1212 | getcwd (adir, MAXPATHLEN + 1); |
f5c81c80 EZ |
1213 | if (multibyte) |
1214 | { | |
1215 | Lisp_Object tem = build_string (adir); | |
1216 | ||
1217 | tem = DECODE_FILE (tem); | |
1218 | memcpy (adir, SSDATA (tem), SBYTES (tem) + 1); | |
1219 | } | |
2893f146 | 1220 | newdir = adir; |
199607e4 RS |
1221 | } |
1222 | ||
e8d32c7e | 1223 | /* Strip off drive name from prefix, if present. */ |
c70a4df6 | 1224 | if (IS_DRIVE (newdir[0]) && IS_DEVICE_SEP (newdir[1])) |
199607e4 RS |
1225 | { |
1226 | drive = newdir[0]; | |
1227 | newdir += 2; | |
1228 | } | |
1229 | ||
1230 | /* Keep only a prefix from newdir if nm starts with slash | |
82330e7f | 1231 | (//server/share for UNC, nothing otherwise). */ |
9a1dc3be | 1232 | if (IS_DIRECTORY_SEP (nm[0]) && collapse_newdir) |
199607e4 RS |
1233 | { |
1234 | #ifdef WINDOWSNT | |
1235 | if (IS_DIRECTORY_SEP (newdir[0]) && IS_DIRECTORY_SEP (newdir[1])) | |
1236 | { | |
2893f146 PE |
1237 | char *adir = strcpy (alloca (strlen (newdir) + 1), newdir); |
1238 | char *p = adir + 2; | |
199607e4 RS |
1239 | while (*p && !IS_DIRECTORY_SEP (*p)) p++; |
1240 | p++; | |
1241 | while (*p && !IS_DIRECTORY_SEP (*p)) p++; | |
1242 | *p = 0; | |
2893f146 | 1243 | newdir = adir; |
199607e4 RS |
1244 | } |
1245 | else | |
1246 | #endif | |
1247 | newdir = ""; | |
1248 | } | |
1249 | } | |
5e570b75 | 1250 | #endif /* DOS_NT */ |
199607e4 RS |
1251 | |
1252 | if (newdir) | |
bfb61299 | 1253 | { |
57676091 | 1254 | /* Get rid of any slash at the end of newdir, unless newdir is |
f0f95d31 | 1255 | just / or // (an incomplete UNC name). */ |
199607e4 | 1256 | length = strlen (newdir); |
c293e30c | 1257 | tlen = length + 1; |
f0f95d31 | 1258 | if (length > 1 && IS_DIRECTORY_SEP (newdir[length - 1]) |
57676091 RS |
1259 | #ifdef WINDOWSNT |
1260 | && !(length == 2 && IS_DIRECTORY_SEP (newdir[0])) | |
1261 | #endif | |
1262 | ) | |
bfb61299 | 1263 | { |
38182d90 | 1264 | char *temp = alloca (length); |
72af86bd | 1265 | memcpy (temp, newdir, length - 1); |
bfb61299 | 1266 | temp[length - 1] = 0; |
c293e30c | 1267 | length--; |
bfb61299 JB |
1268 | newdir = temp; |
1269 | } | |
bfb61299 JB |
1270 | } |
1271 | else | |
c293e30c DA |
1272 | { |
1273 | length = 0; | |
1274 | tlen = 0; | |
1275 | } | |
570d7624 | 1276 | |
e8d32c7e | 1277 | /* Now concatenate the directory and name to new space in the stack frame. */ |
bfb61299 | 1278 | tlen += strlen (nm) + 1; |
5e570b75 | 1279 | #ifdef DOS_NT |
f0f95d31 RS |
1280 | /* Reserve space for drive specifier and escape prefix, since either |
1281 | or both may need to be inserted. (The Microsoft x86 compiler | |
5e570b75 | 1282 | produces incorrect code if the following two lines are combined.) */ |
38182d90 | 1283 | target = alloca (tlen + 4); |
f0f95d31 | 1284 | target += 4; |
5e570b75 | 1285 | #else /* not DOS_NT */ |
38182d90 | 1286 | target = alloca (tlen); |
5e570b75 | 1287 | #endif /* not DOS_NT */ |
570d7624 JB |
1288 | *target = 0; |
1289 | ||
1290 | if (newdir) | |
1291 | { | |
5e570b75 | 1292 | if (nm[0] == 0 || IS_DIRECTORY_SEP (nm[0])) |
f5321b5c | 1293 | { |
3ea2d8b2 | 1294 | #ifdef DOS_NT |
f5321b5c RS |
1295 | /* If newdir is effectively "C:/", then the drive letter will have |
1296 | been stripped and newdir will be "/". Concatenating with an | |
1297 | absolute directory in nm produces "//", which will then be | |
1298 | incorrectly treated as a network share. Ignore newdir in | |
1299 | this case (keeping the drive letter). */ | |
efdc16c9 | 1300 | if (!(drive && nm[0] && IS_DIRECTORY_SEP (newdir[0]) |
f5321b5c RS |
1301 | && newdir[1] == '\0')) |
1302 | #endif | |
1303 | strcpy (target, newdir); | |
1304 | } | |
570d7624 | 1305 | else |
f5c81c80 | 1306 | file_name_as_directory (target, newdir, length, multibyte); |
570d7624 JB |
1307 | } |
1308 | ||
1309 | strcat (target, nm); | |
199607e4 | 1310 | |
214378ec GM |
1311 | /* Now canonicalize by removing `//', `/.' and `/foo/..' if they |
1312 | appear. */ | |
5b5a2ea1 | 1313 | { |
5976c3fe PE |
1314 | char *p = target; |
1315 | char *o = target; | |
570d7624 | 1316 | |
5b5a2ea1 SM |
1317 | while (*p) |
1318 | { | |
5b5a2ea1 SM |
1319 | if (!IS_DIRECTORY_SEP (*p)) |
1320 | { | |
1321 | *o++ = *p++; | |
1322 | } | |
1323 | else if (p[1] == '.' | |
1324 | && (IS_DIRECTORY_SEP (p[2]) | |
1325 | || p[2] == 0)) | |
1326 | { | |
1327 | /* If "/." is the entire filename, keep the "/". Otherwise, | |
1328 | just delete the whole "/.". */ | |
1329 | if (o == target && p[2] == '\0') | |
1330 | *o++ = *p; | |
1331 | p += 2; | |
1332 | } | |
1333 | else if (p[1] == '.' && p[2] == '.' | |
1334 | /* `/../' is the "superroot" on certain file systems. | |
1335 | Turned off on DOS_NT systems because they have no | |
1336 | "superroot" and because this causes us to produce | |
1337 | file names like "d:/../foo" which fail file-related | |
1338 | functions of the underlying OS. (To reproduce, try a | |
1339 | long series of "../../" in default_directory, longer | |
1340 | than the number of levels from the root.) */ | |
aa4060b9 | 1341 | #ifndef DOS_NT |
5b5a2ea1 | 1342 | && o != target |
aa4060b9 | 1343 | #endif |
5b5a2ea1 SM |
1344 | && (IS_DIRECTORY_SEP (p[3]) || p[3] == 0)) |
1345 | { | |
972ed246 | 1346 | #ifdef WINDOWSNT |
5976c3fe | 1347 | char *prev_o = o; |
972ed246 | 1348 | #endif |
7ba11bee PE |
1349 | while (o != target && (--o, !IS_DIRECTORY_SEP (*o))) |
1350 | continue; | |
972ed246 JR |
1351 | #ifdef WINDOWSNT |
1352 | /* Don't go below server level in UNC filenames. */ | |
1353 | if (o == target + 1 && IS_DIRECTORY_SEP (*o) | |
1354 | && IS_DIRECTORY_SEP (*target)) | |
1355 | o = prev_o; | |
1356 | else | |
1357 | #endif | |
5b5a2ea1 SM |
1358 | /* Keep initial / only if this is the whole name. */ |
1359 | if (o == target && IS_ANY_SEP (*o) && p[3] == 0) | |
1360 | ++o; | |
1361 | p += 3; | |
1362 | } | |
1363 | else if (p > target && IS_DIRECTORY_SEP (p[1])) | |
1364 | /* Collapse multiple `/' in a row. */ | |
1365 | p++; | |
1366 | else | |
1367 | { | |
1368 | *o++ = *p++; | |
1369 | } | |
5b5a2ea1 | 1370 | } |
570d7624 | 1371 | |
5e570b75 | 1372 | #ifdef DOS_NT |
e8d32c7e | 1373 | /* At last, set drive name. */ |
5e570b75 | 1374 | #ifdef WINDOWSNT |
5b5a2ea1 SM |
1375 | /* Except for network file name. */ |
1376 | if (!(IS_DIRECTORY_SEP (target[0]) && IS_DIRECTORY_SEP (target[1]))) | |
5e570b75 | 1377 | #endif /* WINDOWSNT */ |
5b5a2ea1 | 1378 | { |
1088b922 | 1379 | if (!drive) emacs_abort (); |
5b5a2ea1 SM |
1380 | target -= 2; |
1381 | target[0] = DRIVE_LETTER (drive); | |
1382 | target[1] = ':'; | |
1383 | } | |
1384 | /* Reinsert the escape prefix if required. */ | |
1385 | if (is_escaped) | |
1386 | { | |
1387 | target -= 2; | |
1388 | target[0] = '/'; | |
1389 | target[1] = ':'; | |
1390 | } | |
5b5a2ea1 | 1391 | result = make_specified_string (target, -1, o - target, multibyte); |
e7ac588e EZ |
1392 | dostounix_filename (SSDATA (result), multibyte); |
1393 | #ifdef WINDOWSNT | |
1394 | if (!NILP (Vw32_downcase_file_names)) | |
1395 | result = Fdowncase (result); | |
1396 | #endif | |
273ac8d1 EZ |
1397 | #else /* !DOS_NT */ |
1398 | result = make_specified_string (target, -1, o - target, multibyte); | |
1399 | #endif /* !DOS_NT */ | |
5b5a2ea1 | 1400 | } |
beb402de KG |
1401 | |
1402 | /* Again look to see if the file name has special constructs in it | |
1403 | and perhaps call the corresponding file handler. This is needed | |
1404 | for filenames such as "/foo/../user@host:/bar/../baz". Expanding | |
1405 | the ".." component gives us "/user@host:/bar/../baz" which needs | |
e8d32c7e | 1406 | to be expanded again. */ |
beb402de KG |
1407 | handler = Ffind_file_name_handler (result, Qexpand_file_name); |
1408 | if (!NILP (handler)) | |
2375c96a CY |
1409 | { |
1410 | handled_name = call3 (handler, Qexpand_file_name, | |
1411 | result, default_directory); | |
1412 | if (STRINGP (handled_name)) | |
1413 | return handled_name; | |
1414 | error ("Invalid handler in `file-name-handler-alist'"); | |
1415 | } | |
beb402de KG |
1416 | |
1417 | return result; | |
570d7624 | 1418 | } |
5e570b75 | 1419 | |
4887597a EZ |
1420 | #if 0 |
1421 | /* PLEASE DO NOT DELETE THIS COMMENTED-OUT VERSION! | |
1422 | This is the old version of expand-file-name, before it was thoroughly | |
1423 | rewritten for Emacs 10.31. We leave this version here commented-out, | |
1424 | because the code is very complex and likely to have subtle bugs. If | |
1425 | bugs _are_ found, it might be of interest to look at the old code and | |
1426 | see what did it do in the relevant situation. | |
1427 | ||
30f50381 GM |
1428 | Don't remove this code: it's true that it will be accessible |
1429 | from the repository, but a few years from deletion, people will | |
1430 | forget it is there. */ | |
4887597a EZ |
1431 | |
1432 | /* Changed this DEFUN to a DEAFUN, so as not to confuse `make-docfile'. */ | |
1433 | DEAFUN ("expand-file-name", Fexpand_file_name, Sexpand_file_name, 1, 2, 0, | |
1434 | "Convert FILENAME to absolute, and canonicalize it.\n\ | |
1435 | Second arg DEFAULT is directory to start with if FILENAME is relative\n\ | |
c70a4df6 | 1436 | \(does not start with slash); if DEFAULT is nil or missing,\n\ |
4887597a EZ |
1437 | the current buffer's value of default-directory is used.\n\ |
1438 | Filenames containing `.' or `..' as components are simplified;\n\ | |
1439 | initial `~/' expands to your home directory.\n\ | |
1440 | See also the function `substitute-in-file-name'.") | |
1441 | (name, defalt) | |
1442 | Lisp_Object name, defalt; | |
1443 | { | |
1444 | unsigned char *nm; | |
1445 | ||
1446 | register unsigned char *newdir, *p, *o; | |
93f4cf88 | 1447 | ptrdiff_t tlen; |
4887597a EZ |
1448 | unsigned char *target; |
1449 | struct passwd *pw; | |
4887597a | 1450 | |
b7826503 | 1451 | CHECK_STRING (name); |
d5db4077 | 1452 | nm = SDATA (name); |
4887597a EZ |
1453 | |
1454 | /* If nm is absolute, flush ...// and detect /./ and /../. | |
1455 | If no /./ or /../ we can return right away. */ | |
7c2fb837 | 1456 | if (nm[0] == '/') |
4887597a | 1457 | { |
f75d7a91 | 1458 | bool lose = 0; |
4887597a | 1459 | p = nm; |
4887597a EZ |
1460 | while (*p) |
1461 | { | |
ce2fe65a | 1462 | if (p[0] == '/' && p[1] == '/') |
4887597a EZ |
1463 | nm = p + 1; |
1464 | if (p[0] == '/' && p[1] == '~') | |
1465 | nm = p + 1, lose = 1; | |
1466 | if (p[0] == '/' && p[1] == '.' | |
1467 | && (p[2] == '/' || p[2] == 0 | |
1468 | || (p[2] == '.' && (p[3] == '/' || p[3] == 0)))) | |
1469 | lose = 1; | |
4887597a EZ |
1470 | p++; |
1471 | } | |
1472 | if (!lose) | |
1473 | { | |
d5db4077 | 1474 | if (nm == SDATA (name)) |
4887597a EZ |
1475 | return name; |
1476 | return build_string (nm); | |
1477 | } | |
1478 | } | |
1479 | ||
e8d32c7e | 1480 | /* Now determine directory to start with and put it in NEWDIR. */ |
4887597a EZ |
1481 | |
1482 | newdir = 0; | |
1483 | ||
1484 | if (nm[0] == '~') /* prefix ~ */ | |
7c2fb837 | 1485 | if (nm[1] == '/' || nm[1] == 0)/* ~/filename */ |
4887597a EZ |
1486 | { |
1487 | if (!(newdir = (unsigned char *) egetenv ("HOME"))) | |
1488 | newdir = (unsigned char *) ""; | |
1489 | nm++; | |
4887597a EZ |
1490 | } |
1491 | else /* ~user/filename */ | |
1492 | { | |
e8d32c7e | 1493 | /* Get past ~ to user. */ |
4887597a | 1494 | unsigned char *user = nm + 1; |
e8d32c7e | 1495 | /* Find end of name. */ |
8966b757 | 1496 | unsigned char *ptr = (unsigned char *) strchr (user, '/'); |
93f4cf88 | 1497 | ptrdiff_t len = ptr ? ptr - user : strlen (user); |
e8d32c7e | 1498 | /* Copy the user name into temp storage. */ |
38182d90 | 1499 | o = alloca (len + 1); |
72af86bd | 1500 | memcpy (o, user, len); |
4887597a EZ |
1501 | o[len] = 0; |
1502 | ||
e8d32c7e | 1503 | /* Look up the user name. */ |
4d7e6e51 | 1504 | block_input (); |
4887597a | 1505 | pw = (struct passwd *) getpwnam (o + 1); |
4d7e6e51 | 1506 | unblock_input (); |
4887597a EZ |
1507 | if (!pw) |
1508 | error ("\"%s\" isn't a registered user", o + 1); | |
1509 | ||
1510 | newdir = (unsigned char *) pw->pw_dir; | |
1511 | ||
1512 | /* Discard the user name from NM. */ | |
1513 | nm += len; | |
1514 | } | |
1515 | ||
7c2fb837 | 1516 | if (nm[0] != '/' && !newdir) |
4887597a EZ |
1517 | { |
1518 | if (NILP (defalt)) | |
1519 | defalt = current_buffer->directory; | |
b7826503 | 1520 | CHECK_STRING (defalt); |
d5db4077 | 1521 | newdir = SDATA (defalt); |
4887597a EZ |
1522 | } |
1523 | ||
e8d32c7e | 1524 | /* Now concatenate the directory and name to new space in the stack frame. */ |
4887597a EZ |
1525 | |
1526 | tlen = (newdir ? strlen (newdir) + 1 : 0) + strlen (nm) + 1; | |
38182d90 | 1527 | target = alloca (tlen); |
4887597a EZ |
1528 | *target = 0; |
1529 | ||
1530 | if (newdir) | |
1531 | { | |
4887597a EZ |
1532 | if (nm[0] == 0 || nm[0] == '/') |
1533 | strcpy (target, newdir); | |
1534 | else | |
4887597a EZ |
1535 | file_name_as_directory (target, newdir); |
1536 | } | |
1537 | ||
1538 | strcat (target, nm); | |
4887597a | 1539 | |
e8d32c7e | 1540 | /* Now canonicalize by removing /. and /foo/.. if they appear. */ |
4887597a EZ |
1541 | |
1542 | p = target; | |
1543 | o = target; | |
1544 | ||
1545 | while (*p) | |
1546 | { | |
4887597a EZ |
1547 | if (*p != '/') |
1548 | { | |
1549 | *o++ = *p++; | |
1550 | } | |
1551 | else if (!strncmp (p, "//", 2) | |
4887597a EZ |
1552 | ) |
1553 | { | |
1554 | o = target; | |
1555 | p++; | |
1556 | } | |
994a7262 RS |
1557 | else if (p[0] == '/' && p[1] == '.' |
1558 | && (p[2] == '/' || p[2] == 0)) | |
4887597a EZ |
1559 | p += 2; |
1560 | else if (!strncmp (p, "/..", 3) | |
1561 | /* `/../' is the "superroot" on certain file systems. */ | |
1562 | && o != target | |
1563 | && (p[3] == '/' || p[3] == 0)) | |
1564 | { | |
1565 | while (o != target && *--o != '/') | |
1566 | ; | |
4887597a EZ |
1567 | if (o == target && *o == '/') |
1568 | ++o; | |
1569 | p += 3; | |
1570 | } | |
1571 | else | |
1572 | { | |
1573 | *o++ = *p++; | |
1574 | } | |
4887597a EZ |
1575 | } |
1576 | ||
1577 | return make_string (target, o - target); | |
1578 | } | |
1579 | #endif | |
570d7624 | 1580 | \f |
c70a4df6 | 1581 | /* If /~ or // appears, discard everything through first slash. */ |
f75d7a91 | 1582 | static bool |
5976c3fe | 1583 | file_name_absolute_p (const char *filename) |
c70a4df6 SM |
1584 | { |
1585 | return | |
1586 | (IS_DIRECTORY_SEP (*filename) || *filename == '~' | |
c70a4df6 SM |
1587 | #ifdef DOS_NT |
1588 | || (IS_DRIVE (*filename) && IS_DEVICE_SEP (filename[1]) | |
1589 | && IS_DIRECTORY_SEP (filename[2])) | |
1590 | #endif | |
1591 | ); | |
1592 | } | |
1593 | ||
5976c3fe PE |
1594 | static char * |
1595 | search_embedded_absfilename (char *nm, char *endp) | |
c70a4df6 | 1596 | { |
5976c3fe | 1597 | char *p, *s; |
c70a4df6 SM |
1598 | |
1599 | for (p = nm + 1; p < endp; p++) | |
1600 | { | |
ce2fe65a | 1601 | if (IS_DIRECTORY_SEP (p[-1]) |
c70a4df6 | 1602 | && file_name_absolute_p (p) |
5e617bc2 | 1603 | #if defined (WINDOWSNT) || defined (CYGWIN) |
c70a4df6 SM |
1604 | /* // at start of file name is meaningful in Apollo, |
1605 | WindowsNT and Cygwin systems. */ | |
f34574c6 | 1606 | && !(IS_DIRECTORY_SEP (p[0]) && p - 1 == nm) |
e39a993c | 1607 | #endif /* not (WINDOWSNT || CYGWIN) */ |
ce2fe65a | 1608 | ) |
c70a4df6 | 1609 | { |
ce2fe65a | 1610 | for (s = p; *s && !IS_DIRECTORY_SEP (*s); s++); |
e8d32c7e | 1611 | if (p[0] == '~' && s > p + 1) /* We've got "/~something/". */ |
c70a4df6 | 1612 | { |
5976c3fe | 1613 | char *o = alloca (s - p + 1); |
c70a4df6 | 1614 | struct passwd *pw; |
72af86bd | 1615 | memcpy (o, p, s - p); |
c70a4df6 SM |
1616 | o [s - p] = 0; |
1617 | ||
1618 | /* If we have ~user and `user' exists, discard | |
1619 | everything up to ~. But if `user' does not exist, leave | |
1620 | ~user alone, it might be a literal file name. */ | |
4d7e6e51 | 1621 | block_input (); |
67c08d6c | 1622 | pw = getpwnam (o + 1); |
4d7e6e51 | 1623 | unblock_input (); |
67c08d6c | 1624 | if (pw) |
c70a4df6 | 1625 | return p; |
c70a4df6 SM |
1626 | } |
1627 | else | |
1628 | return p; | |
1629 | } | |
1630 | } | |
1631 | return NULL; | |
1632 | } | |
1633 | ||
a7ca3326 | 1634 | DEFUN ("substitute-in-file-name", Fsubstitute_in_file_name, |
8c1a1077 PJ |
1635 | Ssubstitute_in_file_name, 1, 1, 0, |
1636 | doc: /* Substitute environment variables referred to in FILENAME. | |
1637 | `$FOO' where FOO is an environment variable name means to substitute | |
1638 | the value of that variable. The variable name should be terminated | |
1639 | with a character not a letter, digit or underscore; otherwise, enclose | |
1640 | the entire variable name in braces. | |
c68845e0 GM |
1641 | |
1642 | If `/~' appears, all of FILENAME through that `/' is discarded. | |
1643 | If `//' appears, everything up to and including the first of | |
1644 | those `/' is discarded. */) | |
5842a27b | 1645 | (Lisp_Object filename) |
570d7624 | 1646 | { |
f75d7a91 | 1647 | char *nm, *s, *p, *o, *x, *endp; |
5976c3fe | 1648 | char *target = NULL; |
5f460827 | 1649 | ptrdiff_t total = 0; |
f75d7a91 | 1650 | bool substituted = 0; |
fce31d69 | 1651 | bool multibyte; |
5976c3fe | 1652 | char *xnm; |
8ce069f5 | 1653 | Lisp_Object handler; |
570d7624 | 1654 | |
b7826503 | 1655 | CHECK_STRING (filename); |
570d7624 | 1656 | |
58aec0d6 JR |
1657 | multibyte = STRING_MULTIBYTE (filename); |
1658 | ||
8ce069f5 RS |
1659 | /* If the file name has special constructs in it, |
1660 | call the corresponding file handler. */ | |
3b7f6e60 | 1661 | handler = Ffind_file_name_handler (filename, Qsubstitute_in_file_name); |
8ce069f5 | 1662 | if (!NILP (handler)) |
2375c96a CY |
1663 | { |
1664 | Lisp_Object handled_name = call2 (handler, Qsubstitute_in_file_name, | |
1665 | filename); | |
1666 | if (STRINGP (handled_name)) | |
1667 | return handled_name; | |
1668 | error ("Invalid handler in `file-name-handler-alist'"); | |
1669 | } | |
8ce069f5 | 1670 | |
58aec0d6 JR |
1671 | /* Always work on a copy of the string, in case GC happens during |
1672 | decode of environment variables, causing the original Lisp_String | |
1673 | data to be relocated. */ | |
38182d90 | 1674 | nm = alloca (SBYTES (filename) + 1); |
72af86bd | 1675 | memcpy (nm, SDATA (filename), SBYTES (filename) + 1); |
0f3f018c | 1676 | |
58aec0d6 | 1677 | #ifdef DOS_NT |
e7ac588e EZ |
1678 | dostounix_filename (nm, multibyte); |
1679 | substituted = (memcmp (nm, SDATA (filename), SBYTES (filename)) != 0); | |
a5a1cc06 | 1680 | #endif |
d5db4077 | 1681 | endp = nm + SBYTES (filename); |
570d7624 | 1682 | |
82330e7f | 1683 | /* If /~ or // appears, discard everything through first slash. */ |
c70a4df6 SM |
1684 | p = search_embedded_absfilename (nm, endp); |
1685 | if (p) | |
1686 | /* Start over with the new string, so we check the file-name-handler | |
1687 | again. Important with filenames like "/home/foo//:/hello///there" | |
ee7683eb | 1688 | which would substitute to "/:/hello///there" rather than "/there". */ |
c70a4df6 | 1689 | return Fsubstitute_in_file_name |
58aec0d6 | 1690 | (make_specified_string (p, -1, endp - p, multibyte)); |
570d7624 JB |
1691 | |
1692 | /* See if any variables are substituted into the string | |
e8d32c7e | 1693 | and find the total length of their values in `total'. */ |
570d7624 JB |
1694 | |
1695 | for (p = nm; p != endp;) | |
1696 | if (*p != '$') | |
1697 | p++; | |
1698 | else | |
1699 | { | |
1700 | p++; | |
1701 | if (p == endp) | |
1702 | goto badsubst; | |
1703 | else if (*p == '$') | |
1704 | { | |
e8d32c7e | 1705 | /* "$$" means a single "$". */ |
570d7624 JB |
1706 | p++; |
1707 | total -= 1; | |
1708 | substituted = 1; | |
1709 | continue; | |
1710 | } | |
1711 | else if (*p == '{') | |
1712 | { | |
1713 | o = ++p; | |
a84b7c53 PE |
1714 | p = memchr (p, '}', endp - p); |
1715 | if (! p) | |
1716 | goto missingclose; | |
570d7624 JB |
1717 | s = p; |
1718 | } | |
1719 | else | |
1720 | { | |
1721 | o = p; | |
620f13b0 | 1722 | while (p != endp && (c_isalnum (*p) || *p == '_')) p++; |
570d7624 JB |
1723 | s = p; |
1724 | } | |
1725 | ||
e8d32c7e | 1726 | /* Copy out the variable name. */ |
38182d90 | 1727 | target = alloca (s - o + 1); |
e99a530f | 1728 | memcpy (target, o, s - o); |
570d7624 | 1729 | target[s - o] = 0; |
5e570b75 | 1730 | #ifdef DOS_NT |
4c3c22f3 | 1731 | strupr (target); /* $home == $HOME etc. */ |
5e570b75 | 1732 | #endif /* DOS_NT */ |
570d7624 | 1733 | |
e8d32c7e | 1734 | /* Get variable value. */ |
5976c3fe | 1735 | o = egetenv (target); |
8d2ced53 | 1736 | if (o) |
58aec0d6 JR |
1737 | { |
1738 | /* Don't try to guess a maximum length - UTF8 can use up to | |
1739 | four bytes per character. This code is unlikely to run | |
1740 | in a situation that requires performance, so decoding the | |
1741 | env variables twice should be acceptable. Note that | |
1742 | decoding may cause a garbage collect. */ | |
1743 | Lisp_Object orig, decoded; | |
d7ea76b4 | 1744 | orig = build_unibyte_string (o); |
58aec0d6 JR |
1745 | decoded = DECODE_FILE (orig); |
1746 | total += SBYTES (decoded); | |
8d2ced53 SM |
1747 | substituted = 1; |
1748 | } | |
1749 | else if (*p == '}') | |
1750 | goto badvar; | |
570d7624 JB |
1751 | } |
1752 | ||
1753 | if (!substituted) | |
e7ac588e EZ |
1754 | { |
1755 | #ifdef WINDOWSNT | |
1756 | if (!NILP (Vw32_downcase_file_names)) | |
1757 | filename = Fdowncase (filename); | |
1758 | #endif | |
1759 | return filename; | |
1760 | } | |
570d7624 | 1761 | |
e8d32c7e SM |
1762 | /* If substitution required, recopy the string and do it. */ |
1763 | /* Make space in stack frame for the new copy. */ | |
38182d90 | 1764 | xnm = alloca (SBYTES (filename) + total + 1); |
570d7624 JB |
1765 | x = xnm; |
1766 | ||
e8d32c7e | 1767 | /* Copy the rest of the name through, replacing $ constructs with values. */ |
570d7624 JB |
1768 | for (p = nm; *p;) |
1769 | if (*p != '$') | |
1770 | *x++ = *p++; | |
1771 | else | |
1772 | { | |
1773 | p++; | |
1774 | if (p == endp) | |
1775 | goto badsubst; | |
1776 | else if (*p == '$') | |
1777 | { | |
1778 | *x++ = *p++; | |
1779 | continue; | |
1780 | } | |
1781 | else if (*p == '{') | |
1782 | { | |
1783 | o = ++p; | |
a84b7c53 PE |
1784 | p = memchr (p, '}', endp - p); |
1785 | if (! p) | |
1786 | goto missingclose; | |
570d7624 JB |
1787 | s = p++; |
1788 | } | |
1789 | else | |
1790 | { | |
1791 | o = p; | |
620f13b0 | 1792 | while (p != endp && (c_isalnum (*p) || *p == '_')) p++; |
570d7624 JB |
1793 | s = p; |
1794 | } | |
1795 | ||
e8d32c7e | 1796 | /* Copy out the variable name. */ |
38182d90 | 1797 | target = alloca (s - o + 1); |
e99a530f | 1798 | memcpy (target, o, s - o); |
570d7624 JB |
1799 | target[s - o] = 0; |
1800 | ||
e8d32c7e | 1801 | /* Get variable value. */ |
5976c3fe | 1802 | o = egetenv (target); |
570d7624 | 1803 | if (!o) |
8d2ced53 SM |
1804 | { |
1805 | *x++ = '$'; | |
1806 | strcpy (x, target); x+= strlen (target); | |
1807 | } | |
60d67b83 RS |
1808 | else |
1809 | { | |
58aec0d6 | 1810 | Lisp_Object orig, decoded; |
93f4cf88 | 1811 | ptrdiff_t orig_length, decoded_length; |
58aec0d6 JR |
1812 | orig_length = strlen (o); |
1813 | orig = make_unibyte_string (o, orig_length); | |
1814 | decoded = DECODE_FILE (orig); | |
1815 | decoded_length = SBYTES (decoded); | |
e99a530f | 1816 | memcpy (x, SDATA (decoded), decoded_length); |
58aec0d6 JR |
1817 | x += decoded_length; |
1818 | ||
1819 | /* If environment variable needed decoding, return value | |
1820 | needs to be multibyte. */ | |
1821 | if (decoded_length != orig_length | |
e99a530f | 1822 | || memcmp (SDATA (decoded), o, orig_length)) |
58aec0d6 | 1823 | multibyte = 1; |
60d67b83 | 1824 | } |
570d7624 JB |
1825 | } |
1826 | ||
1827 | *x = 0; | |
1828 | ||
82330e7f | 1829 | /* If /~ or // appears, discard everything through first slash. */ |
ce2fe65a | 1830 | while ((p = search_embedded_absfilename (xnm, x)) != NULL) |
c70a4df6 SM |
1831 | /* This time we do not start over because we've already expanded envvars |
1832 | and replaced $$ with $. Maybe we should start over as well, but we'd | |
1833 | need to quote some $ to $$ first. */ | |
1834 | xnm = p; | |
570d7624 | 1835 | |
e7ac588e EZ |
1836 | #ifdef WINDOWSNT |
1837 | if (!NILP (Vw32_downcase_file_names)) | |
1838 | { | |
1839 | Lisp_Object xname = make_specified_string (xnm, -1, x - xnm, multibyte); | |
1840 | ||
1841 | xname = Fdowncase (xname); | |
1842 | return xname; | |
1843 | } | |
1844 | else | |
1845 | #endif | |
58aec0d6 | 1846 | return make_specified_string (xnm, -1, x - xnm, multibyte); |
570d7624 JB |
1847 | |
1848 | badsubst: | |
1849 | error ("Bad format environment-variable substitution"); | |
1850 | missingclose: | |
1851 | error ("Missing \"}\" in environment-variable substitution"); | |
1852 | badvar: | |
1853 | error ("Substituting nonexistent environment variable \"%s\"", target); | |
570d7624 JB |
1854 | } |
1855 | \f | |
067ffa38 | 1856 | /* A slightly faster and more convenient way to get |
298b760e | 1857 | (directory-file-name (expand-file-name FOO)). */ |
067ffa38 | 1858 | |
570d7624 | 1859 | Lisp_Object |
971de7fb | 1860 | expand_and_dir_to_file (Lisp_Object filename, Lisp_Object defdir) |
570d7624 | 1861 | { |
199607e4 | 1862 | register Lisp_Object absname; |
570d7624 | 1863 | |
199607e4 | 1864 | absname = Fexpand_file_name (filename, defdir); |
7c2fb837 | 1865 | |
199607e4 | 1866 | /* Remove final slash, if any (unless this is the root dir). |
570d7624 | 1867 | stat behaves differently depending! */ |
d5db4077 KR |
1868 | if (SCHARS (absname) > 1 |
1869 | && IS_DIRECTORY_SEP (SREF (absname, SBYTES (absname) - 1)) | |
e8d32c7e | 1870 | && !IS_DEVICE_SEP (SREF (absname, SBYTES (absname) - 2))) |
ddc61f46 | 1871 | /* We cannot take shortcuts; they might be wrong for magic file names. */ |
199607e4 | 1872 | absname = Fdirectory_file_name (absname); |
199607e4 | 1873 | return absname; |
570d7624 JB |
1874 | } |
1875 | \f | |
3ed15d97 | 1876 | /* Signal an error if the file ABSNAME already exists. |
f75d7a91 | 1877 | If INTERACTIVE, ask the user whether to proceed, |
3ed15d97 RS |
1878 | and bypass the error if the user says to go ahead. |
1879 | QUERYSTRING is a name for the action that is being considered | |
1880 | to alter the file. | |
de1d0127 | 1881 | |
3ed15d97 | 1882 | *STATPTR is used to store the stat information if the file exists. |
de1d0127 | 1883 | If the file does not exist, STATPTR->st_mode is set to 0. |
b8b29dc9 RS |
1884 | If STATPTR is null, we don't store into it. |
1885 | ||
f75d7a91 | 1886 | If QUICK, ask for y or n, not yes or no. */ |
3ed15d97 | 1887 | |
f14b7e14 | 1888 | static void |
5976c3fe | 1889 | barf_or_query_if_file_exists (Lisp_Object absname, const char *querystring, |
f75d7a91 PE |
1890 | bool interactive, struct stat *statptr, |
1891 | bool quick) | |
570d7624 | 1892 | { |
f75d7a91 | 1893 | Lisp_Object tem, encoded_filename; |
4018b5ef | 1894 | struct stat statbuf; |
570d7624 JB |
1895 | struct gcpro gcpro1; |
1896 | ||
643c73b9 RS |
1897 | encoded_filename = ENCODE_FILE (absname); |
1898 | ||
e8d32c7e | 1899 | /* `stat' is a good way to tell whether the file exists, |
4018b5ef | 1900 | regardless of what access permissions it has. */ |
42a5b22f | 1901 | if (lstat (SSDATA (encoded_filename), &statbuf) >= 0) |
570d7624 | 1902 | { |
6e9b2be9 | 1903 | if (S_ISDIR (statbuf.st_mode)) |
c4f2d8d4 | 1904 | xsignal2 (Qfile_error, |
ad637907 | 1905 | build_string ("File is a directory"), absname); |
c4f2d8d4 | 1906 | |
570d7624 | 1907 | if (! interactive) |
24b1ddad KS |
1908 | xsignal2 (Qfile_already_exists, |
1909 | build_string ("File already exists"), absname); | |
570d7624 | 1910 | GCPRO1 (absname); |
67e8e2b8 RS |
1911 | tem = format2 ("File %s already exists; %s anyway? ", |
1912 | absname, build_string (querystring)); | |
b8b29dc9 | 1913 | if (quick) |
5616cc54 | 1914 | tem = call1 (intern ("y-or-n-p"), tem); |
b8b29dc9 RS |
1915 | else |
1916 | tem = do_yes_or_no_p (tem); | |
570d7624 | 1917 | UNGCPRO; |
265a9e55 | 1918 | if (NILP (tem)) |
24b1ddad KS |
1919 | xsignal2 (Qfile_already_exists, |
1920 | build_string ("File already exists"), absname); | |
3ed15d97 RS |
1921 | if (statptr) |
1922 | *statptr = statbuf; | |
1923 | } | |
1924 | else | |
1925 | { | |
1926 | if (statptr) | |
1927 | statptr->st_mode = 0; | |
570d7624 JB |
1928 | } |
1929 | return; | |
1930 | } | |
1931 | ||
574c05e2 | 1932 | DEFUN ("copy-file", Fcopy_file, Scopy_file, 2, 6, |
7c0f6118 | 1933 | "fCopy file: \nGCopy %s to file: \np\nP", |
8c1a1077 PJ |
1934 | doc: /* Copy FILE to NEWNAME. Both args must be strings. |
1935 | If NEWNAME names a directory, copy FILE there. | |
795c20df CY |
1936 | |
1937 | This function always sets the file modes of the output file to match | |
1938 | the input file. | |
1939 | ||
1940 | The optional third argument OK-IF-ALREADY-EXISTS specifies what to do | |
1941 | if file NEWNAME already exists. If OK-IF-ALREADY-EXISTS is nil, we | |
1942 | signal a `file-already-exists' error without overwriting. If | |
1943 | OK-IF-ALREADY-EXISTS is a number, we request confirmation from the user | |
1944 | about overwriting; this is what happens in interactive use with M-x. | |
1945 | Any other value for OK-IF-ALREADY-EXISTS means to overwrite the | |
1946 | existing file. | |
c50f15d0 | 1947 | |
7f08b80e | 1948 | Fourth arg KEEP-TIME non-nil means give the output file the same |
8c1a1077 | 1949 | last-modified time as the old one. (This works on only some systems.) |
c50f15d0 | 1950 | |
7fce7dfe EZ |
1951 | A prefix arg makes KEEP-TIME non-nil. |
1952 | ||
586702ce | 1953 | If PRESERVE-UID-GID is non-nil, we try to transfer the |
574c05e2 KK |
1954 | uid and gid of FILE to NEWNAME. |
1955 | ||
7c3d167f RF |
1956 | If PRESERVE-EXTENDED-ATTRIBUTES is non-nil, we try to copy additional |
1957 | attributes of FILE to NEWNAME, such as its SELinux context and ACL | |
1958 | entries (depending on how Emacs was built). */) | |
1959 | (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 | 1960 | { |
8a2cbd72 | 1961 | int ifd, ofd; |
d311d28c | 1962 | int n; |
570d7624 | 1963 | char buf[16 * 1024]; |
3ed15d97 | 1964 | struct stat st, out_st; |
32f4334d | 1965 | Lisp_Object handler; |
b1d1b865 | 1966 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; |
d311d28c | 1967 | ptrdiff_t count = SPECPDL_INDEX (); |
b1d1b865 | 1968 | Lisp_Object encoded_file, encoded_newname; |
574c05e2 KK |
1969 | #if HAVE_LIBSELINUX |
1970 | security_context_t con; | |
f75d7a91 | 1971 | int conlength = 0; |
574c05e2 | 1972 | #endif |
ffdc270a | 1973 | #ifdef WINDOWSNT |
7c3d167f RF |
1974 | acl_t acl = NULL; |
1975 | #endif | |
570d7624 | 1976 | |
b1d1b865 RS |
1977 | encoded_file = encoded_newname = Qnil; |
1978 | GCPRO4 (file, newname, encoded_file, encoded_newname); | |
b7826503 PJ |
1979 | CHECK_STRING (file); |
1980 | CHECK_STRING (newname); | |
b1d1b865 | 1981 | |
a9d14e54 | 1982 | if (!NILP (Ffile_directory_p (newname))) |
6b61353c | 1983 | newname = Fexpand_file_name (Ffile_name_nondirectory (file), newname); |
a9d14e54 GM |
1984 | else |
1985 | newname = Fexpand_file_name (newname, Qnil); | |
1986 | ||
3b7f6e60 | 1987 | file = Fexpand_file_name (file, Qnil); |
32f4334d | 1988 | |
0bf2eed2 | 1989 | /* If the input file name has special constructs in it, |
32f4334d | 1990 | call the corresponding file handler. */ |
3b7f6e60 | 1991 | handler = Ffind_file_name_handler (file, Qcopy_file); |
0bf2eed2 | 1992 | /* Likewise for output file name. */ |
51cf6d37 | 1993 | if (NILP (handler)) |
49307295 | 1994 | handler = Ffind_file_name_handler (newname, Qcopy_file); |
32f4334d | 1995 | if (!NILP (handler)) |
574c05e2 KK |
1996 | RETURN_UNGCPRO (call7 (handler, Qcopy_file, file, newname, |
1997 | ok_if_already_exists, keep_time, preserve_uid_gid, | |
7c3d167f | 1998 | preserve_extended_attributes)); |
32f4334d | 1999 | |
b1d1b865 RS |
2000 | encoded_file = ENCODE_FILE (file); |
2001 | encoded_newname = ENCODE_FILE (newname); | |
2002 | ||
265a9e55 | 2003 | if (NILP (ok_if_already_exists) |
93c30b5f | 2004 | || INTEGERP (ok_if_already_exists)) |
2f868094 | 2005 | barf_or_query_if_file_exists (newname, "copy to it", |
b8b29dc9 | 2006 | INTEGERP (ok_if_already_exists), &out_st, 0); |
42a5b22f | 2007 | else if (stat (SSDATA (encoded_newname), &out_st) < 0) |
3ed15d97 | 2008 | out_st.st_mode = 0; |
570d7624 | 2009 | |
e8691c59 | 2010 | #ifdef WINDOWSNT |
66447e07 EZ |
2011 | if (!NILP (preserve_extended_attributes)) |
2012 | { | |
66447e07 | 2013 | acl = acl_get_file (SDATA (encoded_file), ACL_TYPE_ACCESS); |
ffdc270a | 2014 | if (acl == NULL && acl_errno_valid (errno)) |
66447e07 | 2015 | report_file_error ("Getting ACL", Fcons (file, Qnil)); |
66447e07 | 2016 | } |
d5db4077 | 2017 | if (!CopyFile (SDATA (encoded_file), |
efdc16c9 | 2018 | SDATA (encoded_newname), |
e8691c59 | 2019 | FALSE)) |
8d23a331 EZ |
2020 | { |
2021 | /* CopyFile doesn't set errno when it fails. By far the most | |
2022 | "popular" reason is that the target is read-only. */ | |
2023 | if (GetLastError () == 5) | |
2024 | errno = EACCES; | |
2025 | else | |
2026 | errno = EPERM; | |
2027 | report_file_error ("Copying file", Fcons (file, Fcons (newname, Qnil))); | |
2028 | } | |
8b53dc06 JR |
2029 | /* CopyFile retains the timestamp by default. */ |
2030 | else if (NILP (keep_time)) | |
e8691c59 GM |
2031 | { |
2032 | EMACS_TIME now; | |
ad497129 JR |
2033 | DWORD attributes; |
2034 | char * filename; | |
2035 | ||
d5db4077 | 2036 | filename = SDATA (encoded_newname); |
ad497129 JR |
2037 | |
2038 | /* Ensure file is writable while its modified time is set. */ | |
2039 | attributes = GetFileAttributes (filename); | |
02cca86b | 2040 | SetFileAttributes (filename, attributes & ~FILE_ATTRIBUTE_READONLY); |
e9a9ae03 | 2041 | now = current_emacs_time (); |
d35af63c | 2042 | if (set_file_times (-1, filename, now, now)) |
ad497129 JR |
2043 | { |
2044 | /* Restore original attributes. */ | |
2045 | SetFileAttributes (filename, attributes); | |
24b1ddad KS |
2046 | xsignal2 (Qfile_date_error, |
2047 | build_string ("Cannot set file date"), newname); | |
ad497129 JR |
2048 | } |
2049 | /* Restore original attributes. */ | |
2050 | SetFileAttributes (filename, attributes); | |
e8691c59 | 2051 | } |
66447e07 EZ |
2052 | if (acl != NULL) |
2053 | { | |
2054 | bool fail = | |
2055 | acl_set_file (SDATA (encoded_newname), ACL_TYPE_ACCESS, acl) != 0; | |
ffdc270a | 2056 | if (fail && acl_errno_valid (errno)) |
66447e07 EZ |
2057 | report_file_error ("Setting ACL", Fcons (newname, Qnil)); |
2058 | ||
2059 | acl_free (acl); | |
2060 | } | |
e8691c59 | 2061 | #else /* not WINDOWSNT */ |
13336908 | 2062 | immediate_quit = 1; |
42a5b22f | 2063 | ifd = emacs_open (SSDATA (encoded_file), O_RDONLY, 0); |
13336908 RS |
2064 | immediate_quit = 0; |
2065 | ||
570d7624 | 2066 | if (ifd < 0) |
3b7f6e60 | 2067 | report_file_error ("Opening input file", Fcons (file, Qnil)); |
570d7624 | 2068 | |
b5148e85 RS |
2069 | record_unwind_protect (close_file_unwind, make_number (ifd)); |
2070 | ||
d20704ef PE |
2071 | if (fstat (ifd, &st) != 0) |
2072 | report_file_error ("Input file status", Fcons (file, Qnil)); | |
f73b0ada | 2073 | |
7c3d167f | 2074 | if (!NILP (preserve_extended_attributes)) |
574c05e2 | 2075 | { |
7c3d167f RF |
2076 | #if HAVE_LIBSELINUX |
2077 | if (is_selinux_enabled ()) | |
2078 | { | |
2079 | conlength = fgetfilecon (ifd, &con); | |
2080 | if (conlength == -1) | |
2081 | report_file_error ("Doing fgetfilecon", Fcons (file, Qnil)); | |
2082 | } | |
2083 | #endif | |
7c3d167f | 2084 | } |
574c05e2 | 2085 | |
3ed15d97 RS |
2086 | if (out_st.st_mode != 0 |
2087 | && st.st_dev == out_st.st_dev && st.st_ino == out_st.st_ino) | |
2088 | { | |
2089 | errno = 0; | |
2090 | report_file_error ("Input and output files are the same", | |
3b7f6e60 | 2091 | Fcons (file, Fcons (newname, Qnil))); |
3ed15d97 | 2092 | } |
3ed15d97 | 2093 | |
d20704ef PE |
2094 | /* We can copy only regular files. */ |
2095 | if (!S_ISREG (st.st_mode)) | |
f73b0ada | 2096 | { |
d20704ef PE |
2097 | /* Get a better looking error message. */ |
2098 | errno = S_ISDIR (st.st_mode) ? EISDIR : EINVAL; | |
2099 | report_file_error ("Non-regular file", Fcons (file, Qnil)); | |
f73b0ada | 2100 | } |
f73b0ada | 2101 | |
4c3c22f3 RS |
2102 | #ifdef MSDOS |
2103 | /* System's default file type was set to binary by _fmode in emacs.c. */ | |
c50f15d0 | 2104 | ofd = emacs_open (SDATA (encoded_newname), |
7fce7dfe | 2105 | O_WRONLY | O_TRUNC | O_CREAT |
795c20df | 2106 | | (NILP (ok_if_already_exists) ? O_EXCL : 0), |
c50f15d0 RS |
2107 | S_IREAD | S_IWRITE); |
2108 | #else /* not MSDOS */ | |
15e3a074 | 2109 | { |
d20704ef PE |
2110 | mode_t new_mask = !NILP (preserve_uid_gid) ? 0600 : 0666; |
2111 | new_mask &= st.st_mode; | |
15e3a074 PE |
2112 | ofd = emacs_open (SSDATA (encoded_newname), |
2113 | (O_WRONLY | O_TRUNC | O_CREAT | |
2114 | | (NILP (ok_if_already_exists) ? O_EXCL : 0)), | |
2115 | new_mask); | |
2116 | } | |
4c3c22f3 | 2117 | #endif /* not MSDOS */ |
570d7624 | 2118 | if (ofd < 0) |
3ed15d97 | 2119 | report_file_error ("Opening output file", Fcons (newname, Qnil)); |
b5148e85 RS |
2120 | |
2121 | record_unwind_protect (close_file_unwind, make_number (ofd)); | |
570d7624 | 2122 | |
b5148e85 RS |
2123 | immediate_quit = 1; |
2124 | QUIT; | |
68c45bf0 PE |
2125 | while ((n = emacs_read (ifd, buf, sizeof buf)) > 0) |
2126 | if (emacs_write (ofd, buf, n) != n) | |
3ed15d97 | 2127 | report_file_error ("I/O error", Fcons (newname, Qnil)); |
b5148e85 | 2128 | immediate_quit = 0; |
570d7624 | 2129 | |
b016179b | 2130 | #ifndef MSDOS |
ffdc270a | 2131 | /* Preserve the original file permissions, and if requested, also its |
b016179b | 2132 | owner and group. */ |
d20704ef PE |
2133 | { |
2134 | mode_t mode_mask = 07777; | |
2135 | if (!NILP (preserve_uid_gid)) | |
2136 | { | |
2137 | /* Attempt to change owner and group. If that doesn't work | |
2138 | attempt to change just the group, as that is sometimes allowed. | |
2139 | Adjust the mode mask to eliminate setuid or setgid bits | |
2140 | that are inappropriate if the owner and group are wrong. */ | |
2141 | if (fchown (ofd, st.st_uid, st.st_gid) != 0) | |
2142 | { | |
2143 | mode_mask &= ~06000; | |
2144 | if (fchown (ofd, -1, st.st_gid) == 0) | |
2145 | mode_mask |= 02000; | |
2146 | } | |
2147 | } | |
ffdc270a PE |
2148 | |
2149 | switch (!NILP (preserve_extended_attributes) | |
2150 | ? qcopy_acl (SSDATA (encoded_file), ifd, | |
2151 | SSDATA (encoded_newname), ofd, | |
2152 | st.st_mode & mode_mask) | |
2153 | : fchmod (ofd, st.st_mode & mode_mask)) | |
2154 | { | |
2155 | case -2: report_file_error ("Copying permissions from", list1 (file)); | |
2156 | case -1: report_file_error ("Copying permissions to", list1 (newname)); | |
2157 | } | |
d20704ef | 2158 | } |
b016179b | 2159 | #endif /* not MSDOS */ |
586702ce | 2160 | |
574c05e2 KK |
2161 | #if HAVE_LIBSELINUX |
2162 | if (conlength > 0) | |
2163 | { | |
24c51a09 | 2164 | /* Set the modified context back to the file. */ |
f75d7a91 | 2165 | bool fail = fsetfilecon (ofd, con) != 0; |
24c51a09 GM |
2166 | /* See http://debbugs.gnu.org/11245 for ENOTSUP. */ |
2167 | if (fail && errno != ENOTSUP) | |
574c05e2 KK |
2168 | report_file_error ("Doing fsetfilecon", Fcons (newname, Qnil)); |
2169 | ||
2170 | freecon (con); | |
2171 | } | |
2172 | #endif | |
2173 | ||
d20704ef | 2174 | if (!NILP (keep_time)) |
570d7624 | 2175 | { |
d20704ef PE |
2176 | EMACS_TIME atime = get_stat_atime (&st); |
2177 | EMACS_TIME mtime = get_stat_mtime (&st); | |
2178 | if (set_file_times (ofd, SSDATA (encoded_newname), atime, mtime)) | |
2179 | xsignal2 (Qfile_date_error, | |
2180 | build_string ("Cannot set file date"), newname); | |
570d7624 JB |
2181 | } |
2182 | ||
d35af63c PE |
2183 | if (emacs_close (ofd) < 0) |
2184 | report_file_error ("I/O error", Fcons (newname, Qnil)); | |
2185 | ||
68c45bf0 | 2186 | emacs_close (ifd); |
b016179b | 2187 | |
ed68db4d | 2188 | #ifdef MSDOS |
d20704ef PE |
2189 | /* In DJGPP v2.0 and later, fstat usually returns true file mode bits, |
2190 | and if it can't, it tells so. Otherwise, under MSDOS we usually | |
2191 | get only the READ bit, which will make the copied file read-only, | |
2192 | so it's better not to chmod at all. */ | |
2193 | if ((_djstat_flags & _STFAIL_WRITEBIT) == 0) | |
2194 | chmod (SDATA (encoded_newname), st.st_mode & 07777); | |
ed68db4d | 2195 | #endif /* MSDOS */ |
b016179b | 2196 | #endif /* not WINDOWSNT */ |
5acac34e | 2197 | |
b5148e85 RS |
2198 | /* Discard the unwind protects. */ |
2199 | specpdl_ptr = specpdl + count; | |
2200 | ||
570d7624 JB |
2201 | UNGCPRO; |
2202 | return Qnil; | |
2203 | } | |
385b6cc7 | 2204 | \f |
9bbe01fb | 2205 | DEFUN ("make-directory-internal", Fmake_directory_internal, |
353cfc19 | 2206 | Smake_directory_internal, 1, 1, 0, |
8c1a1077 | 2207 | doc: /* Create a new directory named DIRECTORY. */) |
5842a27b | 2208 | (Lisp_Object directory) |
570d7624 | 2209 | { |
5976c3fe | 2210 | const char *dir; |
32f4334d | 2211 | Lisp_Object handler; |
b1d1b865 | 2212 | Lisp_Object encoded_dir; |
570d7624 | 2213 | |
b7826503 | 2214 | CHECK_STRING (directory); |
3b7f6e60 | 2215 | directory = Fexpand_file_name (directory, Qnil); |
32f4334d | 2216 | |
3b7f6e60 | 2217 | handler = Ffind_file_name_handler (directory, Qmake_directory_internal); |
32f4334d | 2218 | if (!NILP (handler)) |
3b7f6e60 | 2219 | return call2 (handler, Qmake_directory_internal, directory); |
9bbe01fb | 2220 | |
b1d1b865 RS |
2221 | encoded_dir = ENCODE_FILE (directory); |
2222 | ||
5976c3fe | 2223 | dir = SSDATA (encoded_dir); |
570d7624 | 2224 | |
5e570b75 RS |
2225 | #ifdef WINDOWSNT |
2226 | if (mkdir (dir) != 0) | |
2227 | #else | |
09450bae | 2228 | if (mkdir (dir, 0777 & ~auto_saving_dir_umask) != 0) |
5e570b75 | 2229 | #endif |
a9f2aeae | 2230 | report_file_error ("Creating directory", list1 (directory)); |
570d7624 | 2231 | |
32f4334d | 2232 | return Qnil; |
570d7624 JB |
2233 | } |
2234 | ||
9d8f3bd9 MA |
2235 | DEFUN ("delete-directory-internal", Fdelete_directory_internal, |
2236 | Sdelete_directory_internal, 1, 1, 0, | |
efdc16c9 | 2237 | doc: /* Delete the directory named DIRECTORY. Does not follow symlinks. */) |
5842a27b | 2238 | (Lisp_Object directory) |
570d7624 | 2239 | { |
5976c3fe | 2240 | const char *dir; |
b1d1b865 | 2241 | Lisp_Object encoded_dir; |
570d7624 | 2242 | |
b7826503 | 2243 | CHECK_STRING (directory); |
3b7f6e60 | 2244 | directory = Fdirectory_file_name (Fexpand_file_name (directory, Qnil)); |
b1d1b865 | 2245 | encoded_dir = ENCODE_FILE (directory); |
5976c3fe | 2246 | dir = SSDATA (encoded_dir); |
b1d1b865 | 2247 | |
570d7624 | 2248 | if (rmdir (dir) != 0) |
a9f2aeae | 2249 | report_file_error ("Removing directory", list1 (directory)); |
570d7624 JB |
2250 | |
2251 | return Qnil; | |
2252 | } | |
2253 | ||
2e2bbddb | 2254 | DEFUN ("delete-file", Fdelete_file, Sdelete_file, 1, 2, |
f1a5d776 CY |
2255 | "(list (read-file-name \ |
2256 | (if (and delete-by-moving-to-trash (null current-prefix-arg)) \ | |
2257 | \"Move file to trash: \" \"Delete file: \") \ | |
2258 | nil default-directory (confirm-nonexistent-file-or-buffer)) \ | |
2259 | (null current-prefix-arg))", | |
efdc16c9 | 2260 | doc: /* Delete file named FILENAME. If it is a symlink, remove the symlink. |
53967e09 | 2261 | If file has multiple names, it continues to exist with the other names. |
f1a5d776 CY |
2262 | TRASH non-nil means to trash the file instead of deleting, provided |
2263 | `delete-by-moving-to-trash' is non-nil. | |
53967e09 | 2264 | |
f1a5d776 CY |
2265 | When called interactively, TRASH is t if no prefix argument is given. |
2266 | With a prefix argument, TRASH is nil. */) | |
5842a27b | 2267 | (Lisp_Object filename, Lisp_Object trash) |
570d7624 | 2268 | { |
32f4334d | 2269 | Lisp_Object handler; |
b1d1b865 | 2270 | Lisp_Object encoded_file; |
efdc16c9 | 2271 | struct gcpro gcpro1; |
b1d1b865 | 2272 | |
efdc16c9 | 2273 | GCPRO1 (filename); |
b4bd27c5 RS |
2274 | if (!NILP (Ffile_directory_p (filename)) |
2275 | && NILP (Ffile_symlink_p (filename))) | |
24b1ddad KS |
2276 | xsignal2 (Qfile_error, |
2277 | build_string ("Removing old name: is a directory"), | |
2278 | filename); | |
efdc16c9 | 2279 | UNGCPRO; |
570d7624 | 2280 | filename = Fexpand_file_name (filename, Qnil); |
32f4334d | 2281 | |
49307295 | 2282 | handler = Ffind_file_name_handler (filename, Qdelete_file); |
32f4334d | 2283 | if (!NILP (handler)) |
f5783df3 | 2284 | return call3 (handler, Qdelete_file, filename, trash); |
32f4334d | 2285 | |
f1a5d776 | 2286 | if (delete_by_moving_to_trash && !NILP (trash)) |
6cf29fe8 JR |
2287 | return call1 (Qmove_file_to_trash, filename); |
2288 | ||
b1d1b865 RS |
2289 | encoded_file = ENCODE_FILE (filename); |
2290 | ||
ce2fe65a | 2291 | if (unlink (SSDATA (encoded_file)) < 0) |
a9f2aeae | 2292 | report_file_error ("Removing old name", list1 (filename)); |
8a9b0da9 | 2293 | return Qnil; |
570d7624 JB |
2294 | } |
2295 | ||
385b6cc7 | 2296 | static Lisp_Object |
971de7fb | 2297 | internal_delete_file_1 (Lisp_Object ignore) |
385b6cc7 RS |
2298 | { |
2299 | return Qt; | |
2300 | } | |
2301 | ||
7d80ea23 | 2302 | /* Delete file FILENAME, returning true if successful. |
f1a5d776 | 2303 | This ignores `delete-by-moving-to-trash'. */ |
385b6cc7 | 2304 | |
7d80ea23 | 2305 | bool |
f1a5d776 | 2306 | internal_delete_file (Lisp_Object filename) |
385b6cc7 | 2307 | { |
b0728617 EZ |
2308 | Lisp_Object tem; |
2309 | ||
2310 | tem = internal_condition_case_2 (Fdelete_file, filename, Qnil, | |
2311 | Qt, internal_delete_file_1); | |
2312 | return NILP (tem); | |
385b6cc7 RS |
2313 | } |
2314 | \f | |
570d7624 | 2315 | DEFUN ("rename-file", Frename_file, Srename_file, 2, 3, |
7c0f6118 | 2316 | "fRename file: \nGRename %s to file: \np", |
a4e03fe5 | 2317 | doc: /* Rename FILE as NEWNAME. Both args must be strings. |
8c1a1077 PJ |
2318 | If file has names other than FILE, it continues to have those names. |
2319 | Signals a `file-already-exists' error if a file NEWNAME already exists | |
2320 | unless optional third argument OK-IF-ALREADY-EXISTS is non-nil. | |
2321 | A number as third arg means request confirmation if NEWNAME already exists. | |
2322 | This is what happens in interactive use with M-x. */) | |
5842a27b | 2323 | (Lisp_Object file, Lisp_Object newname, Lisp_Object ok_if_already_exists) |
570d7624 | 2324 | { |
32f4334d | 2325 | Lisp_Object handler; |
f72b5416 JD |
2326 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4, gcpro5; |
2327 | Lisp_Object encoded_file, encoded_newname, symlink_target; | |
570d7624 | 2328 | |
f72b5416 JD |
2329 | symlink_target = encoded_file = encoded_newname = Qnil; |
2330 | GCPRO5 (file, newname, encoded_file, encoded_newname, symlink_target); | |
b7826503 PJ |
2331 | CHECK_STRING (file); |
2332 | CHECK_STRING (newname); | |
3b7f6e60 | 2333 | file = Fexpand_file_name (file, Qnil); |
1ffc5c90 | 2334 | |
f83caf70 EZ |
2335 | if ((!NILP (Ffile_directory_p (newname))) |
2336 | #ifdef DOS_NT | |
2337 | /* If the file names are identical but for the case, | |
2338 | don't attempt to move directory to itself. */ | |
2339 | && (NILP (Fstring_equal (Fdowncase (file), Fdowncase (newname)))) | |
2340 | #endif | |
2341 | ) | |
8719abec | 2342 | { |
ce2fe65a AS |
2343 | Lisp_Object fname = (NILP (Ffile_directory_p (file)) |
2344 | ? file : Fdirectory_file_name (file)); | |
8719abec CY |
2345 | newname = Fexpand_file_name (Ffile_name_nondirectory (fname), newname); |
2346 | } | |
1ffc5c90 RS |
2347 | else |
2348 | newname = Fexpand_file_name (newname, Qnil); | |
32f4334d RS |
2349 | |
2350 | /* If the file name has special constructs in it, | |
2351 | call the corresponding file handler. */ | |
3b7f6e60 | 2352 | handler = Ffind_file_name_handler (file, Qrename_file); |
51cf6d37 | 2353 | if (NILP (handler)) |
49307295 | 2354 | handler = Ffind_file_name_handler (newname, Qrename_file); |
32f4334d | 2355 | if (!NILP (handler)) |
36712b0a | 2356 | RETURN_UNGCPRO (call4 (handler, Qrename_file, |
3b7f6e60 | 2357 | file, newname, ok_if_already_exists)); |
32f4334d | 2358 | |
b1d1b865 RS |
2359 | encoded_file = ENCODE_FILE (file); |
2360 | encoded_newname = ENCODE_FILE (newname); | |
2361 | ||
bc77278f EZ |
2362 | #ifdef DOS_NT |
2363 | /* If the file names are identical but for the case, don't ask for | |
2364 | confirmation: they simply want to change the letter-case of the | |
2365 | file name. */ | |
2366 | if (NILP (Fstring_equal (Fdowncase (file), Fdowncase (newname)))) | |
2367 | #endif | |
265a9e55 | 2368 | if (NILP (ok_if_already_exists) |
93c30b5f | 2369 | || INTEGERP (ok_if_already_exists)) |
2f868094 | 2370 | barf_or_query_if_file_exists (newname, "rename to it", |
b8b29dc9 | 2371 | INTEGERP (ok_if_already_exists), 0, 0); |
ce2fe65a | 2372 | if (rename (SSDATA (encoded_file), SSDATA (encoded_newname)) < 0) |
570d7624 JB |
2373 | { |
2374 | if (errno == EXDEV) | |
2375 | { | |
d311d28c | 2376 | ptrdiff_t count; |
f72b5416 | 2377 | symlink_target = Ffile_symlink_p (file); |
440c7d00 JD |
2378 | if (! NILP (symlink_target)) |
2379 | Fmake_symbolic_link (symlink_target, newname, | |
f59abab9 | 2380 | NILP (ok_if_already_exists) ? Qnil : Qt); |
ae0d7250 | 2381 | else if (!NILP (Ffile_directory_p (file))) |
8719abec CY |
2382 | call4 (Qcopy_directory, file, newname, Qt, Qnil); |
2383 | else | |
2384 | /* We have already prompted if it was an integer, so don't | |
2385 | have copy-file prompt again. */ | |
586702ce | 2386 | Fcopy_file (file, newname, |
586702ce | 2387 | NILP (ok_if_already_exists) ? Qnil : Qt, |
574c05e2 | 2388 | Qt, Qt, Qt); |
d550c425 | 2389 | |
6bddfc97 | 2390 | count = SPECPDL_INDEX (); |
d2b66acf | 2391 | specbind (Qdelete_by_moving_to_trash, Qnil); |
8fab2362 | 2392 | |
ae0d7250 | 2393 | if (!NILP (Ffile_directory_p (file)) && NILP (symlink_target)) |
8719abec CY |
2394 | call2 (Qdelete_directory, file, Qt); |
2395 | else | |
f1a5d776 | 2396 | Fdelete_file (file, Qnil); |
6bddfc97 | 2397 | unbind_to (count, Qnil); |
570d7624 JB |
2398 | } |
2399 | else | |
a9f2aeae | 2400 | report_file_error ("Renaming", list2 (file, newname)); |
570d7624 JB |
2401 | } |
2402 | UNGCPRO; | |
2403 | return Qnil; | |
2404 | } | |
2405 | ||
2406 | DEFUN ("add-name-to-file", Fadd_name_to_file, Sadd_name_to_file, 2, 3, | |
7c0f6118 | 2407 | "fAdd name to file: \nGName to add to %s: \np", |
a4e03fe5 | 2408 | doc: /* Give FILE additional name NEWNAME. Both args must be strings. |
8c1a1077 PJ |
2409 | Signals a `file-already-exists' error if a file NEWNAME already exists |
2410 | unless optional third argument OK-IF-ALREADY-EXISTS is non-nil. | |
2411 | A number as third arg means request confirmation if NEWNAME already exists. | |
2412 | This is what happens in interactive use with M-x. */) | |
5842a27b | 2413 | (Lisp_Object file, Lisp_Object newname, Lisp_Object ok_if_already_exists) |
570d7624 | 2414 | { |
32f4334d | 2415 | Lisp_Object handler; |
b1d1b865 RS |
2416 | Lisp_Object encoded_file, encoded_newname; |
2417 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; | |
570d7624 | 2418 | |
b1d1b865 RS |
2419 | GCPRO4 (file, newname, encoded_file, encoded_newname); |
2420 | encoded_file = encoded_newname = Qnil; | |
b7826503 PJ |
2421 | CHECK_STRING (file); |
2422 | CHECK_STRING (newname); | |
3b7f6e60 | 2423 | file = Fexpand_file_name (file, Qnil); |
1ffc5c90 RS |
2424 | |
2425 | if (!NILP (Ffile_directory_p (newname))) | |
2426 | newname = Fexpand_file_name (Ffile_name_nondirectory (file), newname); | |
2427 | else | |
2428 | newname = Fexpand_file_name (newname, Qnil); | |
32f4334d RS |
2429 | |
2430 | /* If the file name has special constructs in it, | |
2431 | call the corresponding file handler. */ | |
3b7f6e60 | 2432 | handler = Ffind_file_name_handler (file, Qadd_name_to_file); |
32f4334d | 2433 | if (!NILP (handler)) |
3b7f6e60 | 2434 | RETURN_UNGCPRO (call4 (handler, Qadd_name_to_file, file, |
36712b0a | 2435 | newname, ok_if_already_exists)); |
32f4334d | 2436 | |
adc6741c RS |
2437 | /* If the new name has special constructs in it, |
2438 | call the corresponding file handler. */ | |
2439 | handler = Ffind_file_name_handler (newname, Qadd_name_to_file); | |
2440 | if (!NILP (handler)) | |
3b7f6e60 | 2441 | RETURN_UNGCPRO (call4 (handler, Qadd_name_to_file, file, |
adc6741c RS |
2442 | newname, ok_if_already_exists)); |
2443 | ||
b1d1b865 RS |
2444 | encoded_file = ENCODE_FILE (file); |
2445 | encoded_newname = ENCODE_FILE (newname); | |
2446 | ||
265a9e55 | 2447 | if (NILP (ok_if_already_exists) |
93c30b5f | 2448 | || INTEGERP (ok_if_already_exists)) |
2f868094 | 2449 | barf_or_query_if_file_exists (newname, "make it a new name", |
b8b29dc9 | 2450 | INTEGERP (ok_if_already_exists), 0, 0); |
5e570b75 | 2451 | |
42a5b22f | 2452 | unlink (SSDATA (newname)); |
ce2fe65a | 2453 | if (link (SSDATA (encoded_file), SSDATA (encoded_newname)) < 0) |
a9f2aeae | 2454 | report_file_error ("Adding new name", list2 (file, newname)); |
570d7624 JB |
2455 | |
2456 | UNGCPRO; | |
2457 | return Qnil; | |
2458 | } | |
2459 | ||
570d7624 | 2460 | DEFUN ("make-symbolic-link", Fmake_symbolic_link, Smake_symbolic_link, 2, 3, |
7c0f6118 | 2461 | "FMake symbolic link to file: \nGMake symbolic link to file %s: \np", |
68780e2a RS |
2462 | doc: /* Make a symbolic link to FILENAME, named LINKNAME. |
2463 | Both args must be strings. | |
8c1a1077 PJ |
2464 | Signals a `file-already-exists' error if a file LINKNAME already exists |
2465 | unless optional third argument OK-IF-ALREADY-EXISTS is non-nil. | |
2466 | A number as third arg means request confirmation if LINKNAME already exists. | |
2467 | This happens for interactive use with M-x. */) | |
5842a27b | 2468 | (Lisp_Object filename, Lisp_Object linkname, Lisp_Object ok_if_already_exists) |
570d7624 | 2469 | { |
32f4334d | 2470 | Lisp_Object handler; |
b1d1b865 RS |
2471 | Lisp_Object encoded_filename, encoded_linkname; |
2472 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; | |
570d7624 | 2473 | |
b1d1b865 RS |
2474 | GCPRO4 (filename, linkname, encoded_filename, encoded_linkname); |
2475 | encoded_filename = encoded_linkname = Qnil; | |
b7826503 PJ |
2476 | CHECK_STRING (filename); |
2477 | CHECK_STRING (linkname); | |
d9bc1c99 RS |
2478 | /* If the link target has a ~, we must expand it to get |
2479 | a truly valid file name. Otherwise, do not expand; | |
2480 | we want to permit links to relative file names. */ | |
d5db4077 | 2481 | if (SREF (filename, 0) == '~') |
d9bc1c99 | 2482 | filename = Fexpand_file_name (filename, Qnil); |
1ffc5c90 RS |
2483 | |
2484 | if (!NILP (Ffile_directory_p (linkname))) | |
dac24db4 | 2485 | linkname = Fexpand_file_name (Ffile_name_nondirectory (filename), linkname); |
1ffc5c90 RS |
2486 | else |
2487 | linkname = Fexpand_file_name (linkname, Qnil); | |
32f4334d RS |
2488 | |
2489 | /* If the file name has special constructs in it, | |
2490 | call the corresponding file handler. */ | |
49307295 | 2491 | handler = Ffind_file_name_handler (filename, Qmake_symbolic_link); |
32f4334d | 2492 | if (!NILP (handler)) |
36712b0a KH |
2493 | RETURN_UNGCPRO (call4 (handler, Qmake_symbolic_link, filename, |
2494 | linkname, ok_if_already_exists)); | |
32f4334d | 2495 | |
adc6741c RS |
2496 | /* If the new link name has special constructs in it, |
2497 | call the corresponding file handler. */ | |
2498 | handler = Ffind_file_name_handler (linkname, Qmake_symbolic_link); | |
2499 | if (!NILP (handler)) | |
2500 | RETURN_UNGCPRO (call4 (handler, Qmake_symbolic_link, filename, | |
2501 | linkname, ok_if_already_exists)); | |
2502 | ||
b1d1b865 RS |
2503 | encoded_filename = ENCODE_FILE (filename); |
2504 | encoded_linkname = ENCODE_FILE (linkname); | |
2505 | ||
265a9e55 | 2506 | if (NILP (ok_if_already_exists) |
93c30b5f | 2507 | || INTEGERP (ok_if_already_exists)) |
2f868094 | 2508 | barf_or_query_if_file_exists (linkname, "make it a link", |
b8b29dc9 | 2509 | INTEGERP (ok_if_already_exists), 0, 0); |
ce2fe65a | 2510 | if (symlink (SSDATA (encoded_filename), SSDATA (encoded_linkname)) < 0) |
570d7624 JB |
2511 | { |
2512 | /* If we didn't complain already, silently delete existing file. */ | |
2513 | if (errno == EEXIST) | |
2514 | { | |
42a5b22f | 2515 | unlink (SSDATA (encoded_linkname)); |
ce2fe65a AS |
2516 | if (symlink (SSDATA (encoded_filename), SSDATA (encoded_linkname)) |
2517 | >= 0) | |
1a04498e KH |
2518 | { |
2519 | UNGCPRO; | |
2520 | return Qnil; | |
2521 | } | |
570d7624 | 2522 | } |
d9d0d182 PE |
2523 | if (errno == ENOSYS) |
2524 | { | |
2525 | UNGCPRO; | |
2526 | xsignal1 (Qfile_error, | |
2527 | build_string ("Symbolic links are not supported")); | |
2528 | } | |
570d7624 | 2529 | |
a9f2aeae | 2530 | report_file_error ("Making symbolic link", list2 (filename, linkname)); |
570d7624 JB |
2531 | } |
2532 | UNGCPRO; | |
2533 | return Qnil; | |
e89b536d | 2534 | } |
570d7624 | 2535 | |
570d7624 | 2536 | \f |
a7ca3326 | 2537 | DEFUN ("file-name-absolute-p", Ffile_name_absolute_p, Sfile_name_absolute_p, |
570d7624 | 2538 | 1, 1, 0, |
8c1a1077 PJ |
2539 | doc: /* Return t if file FILENAME specifies an absolute file name. |
2540 | On Unix, this is a name starting with a `/' or a `~'. */) | |
5842a27b | 2541 | (Lisp_Object filename) |
570d7624 | 2542 | { |
b7826503 | 2543 | CHECK_STRING (filename); |
5976c3fe | 2544 | return file_name_absolute_p (SSDATA (filename)) ? Qt : Qnil; |
570d7624 | 2545 | } |
3beeedfe | 2546 | \f |
bb385a92 EZ |
2547 | /* Return true if FILENAME exists. */ |
2548 | bool | |
2549 | check_existing (const char *filename) | |
2550 | { | |
73dcdb9f | 2551 | return faccessat (AT_FDCWD, filename, F_OK, AT_EACCESS) == 0; |
bb385a92 EZ |
2552 | } |
2553 | ||
f75d7a91 | 2554 | /* Return true if file FILENAME exists and can be executed. */ |
3beeedfe | 2555 | |
f75d7a91 | 2556 | static bool |
971de7fb | 2557 | check_executable (char *filename) |
3beeedfe | 2558 | { |
73dcdb9f | 2559 | return faccessat (AT_FDCWD, filename, X_OK, AT_EACCESS) == 0; |
3beeedfe RS |
2560 | } |
2561 | ||
73dcdb9f PE |
2562 | /* Return true if file FILENAME exists and can be accessed |
2563 | according to AMODE, which should include W_OK. | |
2564 | On failure, return false and set errno. */ | |
3beeedfe | 2565 | |
f75d7a91 | 2566 | static bool |
73dcdb9f | 2567 | check_writable (const char *filename, int amode) |
3beeedfe | 2568 | { |
3be3c08e | 2569 | #ifdef MSDOS |
73dcdb9f PE |
2570 | /* FIXME: an faccessat implementation should be added to the |
2571 | DOS/Windows ports and this #ifdef branch should be removed. */ | |
3be3c08e RS |
2572 | struct stat st; |
2573 | if (stat (filename, &st) < 0) | |
2574 | return 0; | |
73dcdb9f | 2575 | errno = EPERM; |
f68c809d | 2576 | return (st.st_mode & S_IWRITE || S_ISDIR (st.st_mode)); |
3be3c08e | 2577 | #else /* not MSDOS */ |
73dcdb9f | 2578 | bool res = faccessat (AT_FDCWD, filename, amode, AT_EACCESS) == 0; |
e1b01a3a | 2579 | #ifdef CYGWIN |
73dcdb9f | 2580 | /* faccessat may have returned failure because Cygwin couldn't |
e1b01a3a KB |
2581 | determine the file's UID or GID; if so, we return success. */ |
2582 | if (!res) | |
2583 | { | |
73dcdb9f | 2584 | int faccessat_errno = errno; |
e1b01a3a KB |
2585 | struct stat st; |
2586 | if (stat (filename, &st) < 0) | |
2587 | return 0; | |
2588 | res = (st.st_uid == -1 || st.st_gid == -1); | |
73dcdb9f | 2589 | errno = faccessat_errno; |
e1b01a3a KB |
2590 | } |
2591 | #endif /* CYGWIN */ | |
2592 | return res; | |
3be3c08e | 2593 | #endif /* not MSDOS */ |
3beeedfe | 2594 | } |
570d7624 | 2595 | |
a7ca3326 | 2596 | DEFUN ("file-exists-p", Ffile_exists_p, Sfile_exists_p, 1, 1, 0, |
68780e2a RS |
2597 | doc: /* Return t if file FILENAME exists (whether or not you can read it.) |
2598 | See also `file-readable-p' and `file-attributes'. | |
2599 | This returns nil for a symlink to a nonexistent file. | |
2600 | Use `file-symlink-p' to test for such links. */) | |
5842a27b | 2601 | (Lisp_Object filename) |
570d7624 | 2602 | { |
199607e4 | 2603 | Lisp_Object absname; |
32f4334d | 2604 | Lisp_Object handler; |
570d7624 | 2605 | |
b7826503 | 2606 | CHECK_STRING (filename); |
199607e4 | 2607 | absname = Fexpand_file_name (filename, Qnil); |
32f4334d RS |
2608 | |
2609 | /* If the file name has special constructs in it, | |
2610 | call the corresponding file handler. */ | |
199607e4 | 2611 | handler = Ffind_file_name_handler (absname, Qfile_exists_p); |
32f4334d | 2612 | if (!NILP (handler)) |
199607e4 | 2613 | return call2 (handler, Qfile_exists_p, absname); |
32f4334d | 2614 | |
b1d1b865 RS |
2615 | absname = ENCODE_FILE (absname); |
2616 | ||
bb385a92 | 2617 | return (check_existing (SSDATA (absname))) ? Qt : Qnil; |
570d7624 JB |
2618 | } |
2619 | ||
2620 | DEFUN ("file-executable-p", Ffile_executable_p, Sfile_executable_p, 1, 1, 0, | |
8c1a1077 PJ |
2621 | doc: /* Return t if FILENAME can be executed by you. |
2622 | For a directory, this means you can access files in that directory. */) | |
5842a27b | 2623 | (Lisp_Object filename) |
570d7624 | 2624 | { |
199607e4 | 2625 | Lisp_Object absname; |
32f4334d | 2626 | Lisp_Object handler; |
570d7624 | 2627 | |
b7826503 | 2628 | CHECK_STRING (filename); |
199607e4 | 2629 | absname = Fexpand_file_name (filename, Qnil); |
32f4334d RS |
2630 | |
2631 | /* If the file name has special constructs in it, | |
2632 | call the corresponding file handler. */ | |
199607e4 | 2633 | handler = Ffind_file_name_handler (absname, Qfile_executable_p); |
32f4334d | 2634 | if (!NILP (handler)) |
199607e4 | 2635 | return call2 (handler, Qfile_executable_p, absname); |
32f4334d | 2636 | |
b1d1b865 RS |
2637 | absname = ENCODE_FILE (absname); |
2638 | ||
42a5b22f | 2639 | return (check_executable (SSDATA (absname)) ? Qt : Qnil); |
570d7624 JB |
2640 | } |
2641 | ||
a7ca3326 | 2642 | DEFUN ("file-readable-p", Ffile_readable_p, Sfile_readable_p, 1, 1, 0, |
8c1a1077 PJ |
2643 | doc: /* Return t if file FILENAME exists and you can read it. |
2644 | See also `file-exists-p' and `file-attributes'. */) | |
5842a27b | 2645 | (Lisp_Object filename) |
570d7624 | 2646 | { |
199607e4 | 2647 | Lisp_Object absname; |
32f4334d | 2648 | Lisp_Object handler; |
570d7624 | 2649 | |
b7826503 | 2650 | CHECK_STRING (filename); |
199607e4 | 2651 | absname = Fexpand_file_name (filename, Qnil); |
32f4334d RS |
2652 | |
2653 | /* If the file name has special constructs in it, | |
2654 | call the corresponding file handler. */ | |
199607e4 | 2655 | handler = Ffind_file_name_handler (absname, Qfile_readable_p); |
32f4334d | 2656 | if (!NILP (handler)) |
199607e4 | 2657 | return call2 (handler, Qfile_readable_p, absname); |
32f4334d | 2658 | |
b1d1b865 | 2659 | absname = ENCODE_FILE (absname); |
73dcdb9f PE |
2660 | return (faccessat (AT_FDCWD, SSDATA (absname), R_OK, AT_EACCESS) == 0 |
2661 | ? Qt : Qnil); | |
570d7624 JB |
2662 | } |
2663 | ||
f793dc6c | 2664 | DEFUN ("file-writable-p", Ffile_writable_p, Sfile_writable_p, 1, 1, 0, |
8c1a1077 | 2665 | doc: /* Return t if file FILENAME can be written or created by you. */) |
5842a27b | 2666 | (Lisp_Object filename) |
f793dc6c | 2667 | { |
b1d1b865 | 2668 | Lisp_Object absname, dir, encoded; |
f793dc6c | 2669 | Lisp_Object handler; |
f793dc6c | 2670 | |
b7826503 | 2671 | CHECK_STRING (filename); |
199607e4 | 2672 | absname = Fexpand_file_name (filename, Qnil); |
f793dc6c RS |
2673 | |
2674 | /* If the file name has special constructs in it, | |
2675 | call the corresponding file handler. */ | |
199607e4 | 2676 | handler = Ffind_file_name_handler (absname, Qfile_writable_p); |
f793dc6c | 2677 | if (!NILP (handler)) |
199607e4 | 2678 | return call2 (handler, Qfile_writable_p, absname); |
f793dc6c | 2679 | |
b1d1b865 | 2680 | encoded = ENCODE_FILE (absname); |
73dcdb9f PE |
2681 | if (check_writable (SSDATA (encoded), W_OK)) |
2682 | return Qt; | |
2683 | if (errno != ENOENT) | |
2684 | return Qnil; | |
b1d1b865 | 2685 | |
199607e4 | 2686 | dir = Ffile_name_directory (absname); |
73dcdb9f | 2687 | eassert (!NILP (dir)); |
f793dc6c | 2688 | #ifdef MSDOS |
73dcdb9f | 2689 | dir = Fdirectory_file_name (dir); |
f793dc6c | 2690 | #endif /* MSDOS */ |
b1d1b865 RS |
2691 | |
2692 | dir = ENCODE_FILE (dir); | |
e3e8a75a GM |
2693 | #ifdef WINDOWSNT |
2694 | /* The read-only attribute of the parent directory doesn't affect | |
2695 | whether a file or directory can be created within it. Some day we | |
2696 | should check ACLs though, which do affect this. */ | |
73dcdb9f | 2697 | return file_directory_p (SDATA (dir)) ? Qt : Qnil; |
e3e8a75a | 2698 | #else |
73dcdb9f | 2699 | return check_writable (SSDATA (dir), W_OK | X_OK) ? Qt : Qnil; |
e3e8a75a | 2700 | #endif |
f793dc6c RS |
2701 | } |
2702 | \f | |
1f8653eb | 2703 | DEFUN ("access-file", Faccess_file, Saccess_file, 2, 2, 0, |
8c1a1077 PJ |
2704 | doc: /* Access file FILENAME, and get an error if that does not work. |
2705 | The second argument STRING is used in the error message. | |
a4e03fe5 | 2706 | If there is no error, returns nil. */) |
5842a27b | 2707 | (Lisp_Object filename, Lisp_Object string) |
1f8653eb | 2708 | { |
49475635 | 2709 | Lisp_Object handler, encoded_filename, absname; |
1f8653eb RS |
2710 | int fd; |
2711 | ||
b7826503 | 2712 | CHECK_STRING (filename); |
49475635 EZ |
2713 | absname = Fexpand_file_name (filename, Qnil); |
2714 | ||
b7826503 | 2715 | CHECK_STRING (string); |
1f8653eb RS |
2716 | |
2717 | /* If the file name has special constructs in it, | |
2718 | call the corresponding file handler. */ | |
49475635 | 2719 | handler = Ffind_file_name_handler (absname, Qaccess_file); |
1f8653eb | 2720 | if (!NILP (handler)) |
49475635 | 2721 | return call3 (handler, Qaccess_file, absname, string); |
1f8653eb | 2722 | |
49475635 | 2723 | encoded_filename = ENCODE_FILE (absname); |
b1d1b865 | 2724 | |
42a5b22f | 2725 | fd = emacs_open (SSDATA (encoded_filename), O_RDONLY, 0); |
1f8653eb | 2726 | if (fd < 0) |
42a5b22f | 2727 | report_file_error (SSDATA (string), Fcons (filename, Qnil)); |
68c45bf0 | 2728 | emacs_close (fd); |
1f8653eb RS |
2729 | |
2730 | return Qnil; | |
2731 | } | |
2732 | \f | |
8654f9d7 PE |
2733 | /* Relative to directory FD, return the symbolic link value of FILENAME. |
2734 | On failure, return nil. */ | |
2735 | Lisp_Object | |
2736 | emacs_readlinkat (int fd, char const *filename) | |
2737 | { | |
2738 | static struct allocator const emacs_norealloc_allocator = | |
2739 | { xmalloc, NULL, xfree, memory_full }; | |
2740 | Lisp_Object val; | |
2741 | char readlink_buf[1024]; | |
2742 | char *buf = careadlinkat (fd, filename, readlink_buf, sizeof readlink_buf, | |
2743 | &emacs_norealloc_allocator, readlinkat); | |
2744 | if (!buf) | |
2745 | return Qnil; | |
2746 | ||
2747 | val = build_string (buf); | |
2748 | if (buf[0] == '/' && strchr (buf, ':')) | |
2749 | val = concat2 (build_string ("/:"), val); | |
2750 | if (buf != readlink_buf) | |
2751 | xfree (buf); | |
2752 | val = DECODE_FILE (val); | |
2753 | return val; | |
2754 | } | |
2755 | ||
a7ca3326 | 2756 | DEFUN ("file-symlink-p", Ffile_symlink_p, Sfile_symlink_p, 1, 1, 0, |
8c1a1077 | 2757 | doc: /* Return non-nil if file FILENAME is the name of a symbolic link. |
1c353c74 | 2758 | The value is the link target, as a string. |
68780e2a RS |
2759 | Otherwise it returns nil. |
2760 | ||
2761 | This function returns t when given the name of a symlink that | |
2762 | points to a nonexistent file. */) | |
5842a27b | 2763 | (Lisp_Object filename) |
570d7624 | 2764 | { |
32f4334d | 2765 | Lisp_Object handler; |
570d7624 | 2766 | |
b7826503 | 2767 | CHECK_STRING (filename); |
570d7624 JB |
2768 | filename = Fexpand_file_name (filename, Qnil); |
2769 | ||
32f4334d RS |
2770 | /* If the file name has special constructs in it, |
2771 | call the corresponding file handler. */ | |
49307295 | 2772 | handler = Ffind_file_name_handler (filename, Qfile_symlink_p); |
32f4334d RS |
2773 | if (!NILP (handler)) |
2774 | return call2 (handler, Qfile_symlink_p, filename); | |
2775 | ||
b1d1b865 RS |
2776 | filename = ENCODE_FILE (filename); |
2777 | ||
8654f9d7 | 2778 | return emacs_readlinkat (AT_FDCWD, SSDATA (filename)); |
570d7624 JB |
2779 | } |
2780 | ||
a7ca3326 | 2781 | DEFUN ("file-directory-p", Ffile_directory_p, Sfile_directory_p, 1, 1, 0, |
8c1a1077 PJ |
2782 | doc: /* Return t if FILENAME names an existing directory. |
2783 | Symbolic links to directories count as directories. | |
2784 | See `file-symlink-p' to distinguish symlinks. */) | |
5842a27b | 2785 | (Lisp_Object filename) |
570d7624 | 2786 | { |
73dcdb9f | 2787 | Lisp_Object absname; |
32f4334d | 2788 | Lisp_Object handler; |
570d7624 | 2789 | |
4b4deea2 | 2790 | absname = expand_and_dir_to_file (filename, BVAR (current_buffer, directory)); |
570d7624 | 2791 | |
32f4334d RS |
2792 | /* If the file name has special constructs in it, |
2793 | call the corresponding file handler. */ | |
199607e4 | 2794 | handler = Ffind_file_name_handler (absname, Qfile_directory_p); |
32f4334d | 2795 | if (!NILP (handler)) |
199607e4 | 2796 | return call2 (handler, Qfile_directory_p, absname); |
32f4334d | 2797 | |
b1d1b865 RS |
2798 | absname = ENCODE_FILE (absname); |
2799 | ||
73dcdb9f PE |
2800 | return file_directory_p (SSDATA (absname)) ? Qt : Qnil; |
2801 | } | |
2802 | ||
2803 | /* Return true if FILE is a directory or a symlink to a directory. */ | |
2804 | bool | |
2805 | file_directory_p (char const *file) | |
2806 | { | |
2807 | #ifdef WINDOWSNT | |
2808 | /* This is cheaper than 'stat'. */ | |
2809 | return faccessat (AT_FDCWD, file, D_OK, AT_EACCESS) == 0; | |
2810 | #else | |
2811 | struct stat st; | |
2812 | return stat (file, &st) == 0 && S_ISDIR (st.st_mode); | |
2813 | #endif | |
570d7624 JB |
2814 | } |
2815 | ||
a7ca3326 | 2816 | DEFUN ("file-accessible-directory-p", Ffile_accessible_directory_p, |
16a97296 | 2817 | Sfile_accessible_directory_p, 1, 1, 0, |
e385ec41 RS |
2818 | doc: /* Return t if file FILENAME names a directory you can open. |
2819 | For the value to be t, FILENAME must specify the name of a directory as a file, | |
2820 | and the directory must allow you to open files in it. In order to use a | |
8c1a1077 PJ |
2821 | directory as a buffer's current directory, this predicate must return true. |
2822 | A directory name spec may be given instead; then the value is t | |
2823 | if the directory so specified exists and really is a readable and | |
2824 | searchable directory. */) | |
5842a27b | 2825 | (Lisp_Object filename) |
b72dea2a | 2826 | { |
73dcdb9f | 2827 | Lisp_Object absname; |
32f4334d | 2828 | Lisp_Object handler; |
73dcdb9f PE |
2829 | |
2830 | CHECK_STRING (filename); | |
2831 | absname = Fexpand_file_name (filename, Qnil); | |
32f4334d RS |
2832 | |
2833 | /* If the file name has special constructs in it, | |
2834 | call the corresponding file handler. */ | |
73dcdb9f | 2835 | handler = Ffind_file_name_handler (absname, Qfile_accessible_directory_p); |
32f4334d | 2836 | if (!NILP (handler)) |
73dcdb9f | 2837 | return call2 (handler, Qfile_accessible_directory_p, absname); |
32f4334d | 2838 | |
73dcdb9f PE |
2839 | absname = ENCODE_FILE (absname); |
2840 | return file_accessible_directory_p (SSDATA (absname)) ? Qt : Qnil; | |
2841 | } | |
2842 | ||
2843 | /* If FILE is a searchable directory or a symlink to a | |
2844 | searchable directory, return true. Otherwise return | |
2845 | false and set errno to an error number. */ | |
2846 | bool | |
2847 | file_accessible_directory_p (char const *file) | |
2848 | { | |
2849 | #ifdef DOS_NT | |
2850 | /* There's no need to test whether FILE is searchable, as the | |
2851 | searchable/executable bit is invented on DOS_NT platforms. */ | |
2852 | return file_directory_p (file); | |
2853 | #else | |
2854 | /* On POSIXish platforms, use just one system call; this avoids a | |
2855 | race and is typically faster. */ | |
2856 | ptrdiff_t len = strlen (file); | |
2857 | char const *dir; | |
2858 | bool ok; | |
2859 | int saved_errno; | |
2860 | USE_SAFE_ALLOCA; | |
2861 | ||
2862 | /* Normally a file "FOO" is an accessible directory if "FOO/." exists. | |
2863 | There are three exceptions: "", "/", and "//". Leave "" alone, | |
2864 | as it's invalid. Append only "." to the other two exceptions as | |
2865 | "/" and "//" are distinct on some platforms, whereas "/", "///", | |
2866 | "////", etc. are all equivalent. */ | |
2867 | if (! len) | |
2868 | dir = file; | |
2869 | else | |
2870 | { | |
2871 | /* Just check for trailing '/' when deciding whether to append '/'. | |
2872 | That's simpler than testing the two special cases "/" and "//", | |
2873 | and it's a safe optimization here. */ | |
2874 | char *buf = SAFE_ALLOCA (len + 3); | |
2875 | memcpy (buf, file, len); | |
31ff141c | 2876 | strcpy (buf + len, &"/."[file[len - 1] == '/']); |
73dcdb9f PE |
2877 | dir = buf; |
2878 | } | |
2879 | ||
2880 | ok = check_existing (dir); | |
2881 | saved_errno = errno; | |
2882 | SAFE_FREE (); | |
2883 | errno = saved_errno; | |
2884 | return ok; | |
2885 | #endif | |
b72dea2a JB |
2886 | } |
2887 | ||
f793dc6c | 2888 | DEFUN ("file-regular-p", Ffile_regular_p, Sfile_regular_p, 1, 1, 0, |
19a9c3b7 LH |
2889 | doc: /* Return t if FILENAME names a regular file. |
2890 | This is the sort of file that holds an ordinary stream of data bytes. | |
2891 | Symbolic links to regular files count as regular files. | |
2892 | See `file-symlink-p' to distinguish symlinks. */) | |
5842a27b | 2893 | (Lisp_Object filename) |
f793dc6c | 2894 | { |
199607e4 | 2895 | register Lisp_Object absname; |
f793dc6c RS |
2896 | struct stat st; |
2897 | Lisp_Object handler; | |
2898 | ||
4b4deea2 | 2899 | absname = expand_and_dir_to_file (filename, BVAR (current_buffer, directory)); |
f793dc6c RS |
2900 | |
2901 | /* If the file name has special constructs in it, | |
2902 | call the corresponding file handler. */ | |
199607e4 | 2903 | handler = Ffind_file_name_handler (absname, Qfile_regular_p); |
f793dc6c | 2904 | if (!NILP (handler)) |
199607e4 | 2905 | return call2 (handler, Qfile_regular_p, absname); |
f793dc6c | 2906 | |
b1d1b865 RS |
2907 | absname = ENCODE_FILE (absname); |
2908 | ||
c1c4693e RS |
2909 | #ifdef WINDOWSNT |
2910 | { | |
2911 | int result; | |
2912 | Lisp_Object tem = Vw32_get_true_file_attributes; | |
2913 | ||
2914 | /* Tell stat to use expensive method to get accurate info. */ | |
2915 | Vw32_get_true_file_attributes = Qt; | |
d5db4077 | 2916 | result = stat (SDATA (absname), &st); |
c1c4693e RS |
2917 | Vw32_get_true_file_attributes = tem; |
2918 | ||
2919 | if (result < 0) | |
2920 | return Qnil; | |
f68c809d | 2921 | return S_ISREG (st.st_mode) ? Qt : Qnil; |
c1c4693e RS |
2922 | } |
2923 | #else | |
42a5b22f | 2924 | if (stat (SSDATA (absname), &st) < 0) |
f793dc6c | 2925 | return Qnil; |
f68c809d | 2926 | return S_ISREG (st.st_mode) ? Qt : Qnil; |
c1c4693e | 2927 | #endif |
f793dc6c RS |
2928 | } |
2929 | \f | |
574c05e2 KK |
2930 | DEFUN ("file-selinux-context", Ffile_selinux_context, |
2931 | Sfile_selinux_context, 1, 1, 0, | |
fa74b241 CY |
2932 | doc: /* Return SELinux context of file named FILENAME. |
2933 | The return value is a list (USER ROLE TYPE RANGE), where the list | |
2934 | elements are strings naming the user, role, type, and range of the | |
2935 | file's SELinux security context. | |
2936 | ||
2937 | Return (nil nil nil nil) if the file is nonexistent or inaccessible, | |
2938 | or if SELinux is disabled, or if Emacs lacks SELinux support. */) | |
5842a27b | 2939 | (Lisp_Object filename) |
574c05e2 KK |
2940 | { |
2941 | Lisp_Object absname; | |
2942 | Lisp_Object values[4]; | |
2943 | Lisp_Object handler; | |
2944 | #if HAVE_LIBSELINUX | |
2945 | security_context_t con; | |
2946 | int conlength; | |
2947 | context_t context; | |
2948 | #endif | |
2949 | ||
4b4deea2 | 2950 | absname = expand_and_dir_to_file (filename, BVAR (current_buffer, directory)); |
574c05e2 KK |
2951 | |
2952 | /* If the file name has special constructs in it, | |
2953 | call the corresponding file handler. */ | |
2954 | handler = Ffind_file_name_handler (absname, Qfile_selinux_context); | |
2955 | if (!NILP (handler)) | |
2956 | return call2 (handler, Qfile_selinux_context, absname); | |
2957 | ||
2958 | absname = ENCODE_FILE (absname); | |
2959 | ||
2960 | values[0] = Qnil; | |
2961 | values[1] = Qnil; | |
2962 | values[2] = Qnil; | |
2963 | values[3] = Qnil; | |
2964 | #if HAVE_LIBSELINUX | |
2965 | if (is_selinux_enabled ()) | |
2966 | { | |
b14aac08 | 2967 | conlength = lgetfilecon (SSDATA (absname), &con); |
574c05e2 KK |
2968 | if (conlength > 0) |
2969 | { | |
2970 | context = context_new (con); | |
45841e65 KK |
2971 | if (context_user_get (context)) |
2972 | values[0] = build_string (context_user_get (context)); | |
2973 | if (context_role_get (context)) | |
2974 | values[1] = build_string (context_role_get (context)); | |
2975 | if (context_type_get (context)) | |
2976 | values[2] = build_string (context_type_get (context)); | |
2977 | if (context_range_get (context)) | |
2978 | values[3] = build_string (context_range_get (context)); | |
574c05e2 | 2979 | context_free (context); |
c6ba4138 | 2980 | freecon (con); |
574c05e2 | 2981 | } |
574c05e2 KK |
2982 | } |
2983 | #endif | |
2984 | ||
5e617bc2 | 2985 | return Flist (sizeof (values) / sizeof (values[0]), values); |
574c05e2 KK |
2986 | } |
2987 | \f | |
2988 | DEFUN ("set-file-selinux-context", Fset_file_selinux_context, | |
2989 | Sset_file_selinux_context, 2, 2, 0, | |
fa74b241 CY |
2990 | doc: /* Set SELinux context of file named FILENAME to CONTEXT. |
2991 | CONTEXT should be a list (USER ROLE TYPE RANGE), where the list | |
2992 | elements are strings naming the components of a SELinux context. | |
2993 | ||
ccad023b EZ |
2994 | Value is t if setting of SELinux context was successful, nil otherwise. |
2995 | ||
2996 | This function does nothing and returns nil if SELinux is disabled, | |
2997 | or if Emacs was not compiled with SELinux support. */) | |
5842a27b | 2998 | (Lisp_Object filename, Lisp_Object context) |
574c05e2 | 2999 | { |
0f4a96b5 | 3000 | Lisp_Object absname; |
574c05e2 | 3001 | Lisp_Object handler; |
0f4a96b5 JB |
3002 | #if HAVE_LIBSELINUX |
3003 | Lisp_Object encoded_absname; | |
574c05e2 KK |
3004 | Lisp_Object user = CAR_SAFE (context); |
3005 | Lisp_Object role = CAR_SAFE (CDR_SAFE (context)); | |
3006 | Lisp_Object type = CAR_SAFE (CDR_SAFE (CDR_SAFE (context))); | |
3007 | Lisp_Object range = CAR_SAFE (CDR_SAFE (CDR_SAFE (CDR_SAFE (context)))); | |
574c05e2 | 3008 | security_context_t con; |
f75d7a91 PE |
3009 | bool fail; |
3010 | int conlength; | |
574c05e2 KK |
3011 | context_t parsed_con; |
3012 | #endif | |
3013 | ||
4b4deea2 | 3014 | absname = Fexpand_file_name (filename, BVAR (current_buffer, directory)); |
574c05e2 KK |
3015 | |
3016 | /* If the file name has special constructs in it, | |
3017 | call the corresponding file handler. */ | |
3018 | handler = Ffind_file_name_handler (absname, Qset_file_selinux_context); | |
3019 | if (!NILP (handler)) | |
3020 | return call3 (handler, Qset_file_selinux_context, absname, context); | |
3021 | ||
0f4a96b5 | 3022 | #if HAVE_LIBSELINUX |
574c05e2 KK |
3023 | if (is_selinux_enabled ()) |
3024 | { | |
3025 | /* Get current file context. */ | |
a9b53ad3 | 3026 | encoded_absname = ENCODE_FILE (absname); |
b14aac08 | 3027 | conlength = lgetfilecon (SSDATA (encoded_absname), &con); |
574c05e2 KK |
3028 | if (conlength > 0) |
3029 | { | |
3030 | parsed_con = context_new (con); | |
3031 | /* Change the parts defined in the parameter.*/ | |
3032 | if (STRINGP (user)) | |
3033 | { | |
b14aac08 | 3034 | if (context_user_set (parsed_con, SSDATA (user))) |
574c05e2 KK |
3035 | error ("Doing context_user_set"); |
3036 | } | |
3037 | if (STRINGP (role)) | |
3038 | { | |
b14aac08 | 3039 | if (context_role_set (parsed_con, SSDATA (role))) |
574c05e2 KK |
3040 | error ("Doing context_role_set"); |
3041 | } | |
3042 | if (STRINGP (type)) | |
3043 | { | |
b14aac08 | 3044 | if (context_type_set (parsed_con, SSDATA (type))) |
574c05e2 KK |
3045 | error ("Doing context_type_set"); |
3046 | } | |
3047 | if (STRINGP (range)) | |
3048 | { | |
b14aac08 | 3049 | if (context_range_set (parsed_con, SSDATA (range))) |
574c05e2 KK |
3050 | error ("Doing context_range_set"); |
3051 | } | |
3052 | ||
24c51a09 | 3053 | /* Set the modified context back to the file. */ |
f75d7a91 PE |
3054 | fail = (lsetfilecon (SSDATA (encoded_absname), |
3055 | context_str (parsed_con)) | |
3056 | != 0); | |
24c51a09 GM |
3057 | /* See http://debbugs.gnu.org/11245 for ENOTSUP. */ |
3058 | if (fail && errno != ENOTSUP) | |
574c05e2 KK |
3059 | report_file_error ("Doing lsetfilecon", Fcons (absname, Qnil)); |
3060 | ||
3061 | context_free (parsed_con); | |
c6ba4138 | 3062 | freecon (con); |
c1fea2c0 | 3063 | return fail ? Qnil : Qt; |
574c05e2 KK |
3064 | } |
3065 | else | |
5e617bc2 | 3066 | report_file_error ("Doing lgetfilecon", Fcons (absname, Qnil)); |
574c05e2 KK |
3067 | } |
3068 | #endif | |
3069 | ||
3070 | return Qnil; | |
3071 | } | |
3072 | \f | |
7c3d167f | 3073 | DEFUN ("file-acl", Ffile_acl, Sfile_acl, 1, 1, 0, |
553081a5 SM |
3074 | doc: /* Return ACL entries of file named FILENAME. |
3075 | The entries are returned in a format suitable for use in `set-file-acl' | |
3076 | but is otherwise undocumented and subject to change. | |
7c3d167f | 3077 | Return nil if file does not exist or is not accessible, or if Emacs |
553081a5 | 3078 | was unable to determine the ACL entries. */) |
7c3d167f RF |
3079 | (Lisp_Object filename) |
3080 | { | |
3081 | Lisp_Object absname; | |
3082 | Lisp_Object handler; | |
ffdc270a | 3083 | #ifdef HAVE_ACL_SET_FILE |
7c3d167f RF |
3084 | acl_t acl; |
3085 | Lisp_Object acl_string; | |
3086 | char *str; | |
3087 | #endif | |
3088 | ||
3089 | absname = expand_and_dir_to_file (filename, | |
3090 | BVAR (current_buffer, directory)); | |
3091 | ||
3092 | /* If the file name has special constructs in it, | |
3093 | call the corresponding file handler. */ | |
3094 | handler = Ffind_file_name_handler (absname, Qfile_acl); | |
3095 | if (!NILP (handler)) | |
3096 | return call2 (handler, Qfile_acl, absname); | |
3097 | ||
ffdc270a | 3098 | #ifdef HAVE_ACL_SET_FILE |
7c3d167f RF |
3099 | absname = ENCODE_FILE (absname); |
3100 | ||
3101 | acl = acl_get_file (SSDATA (absname), ACL_TYPE_ACCESS); | |
3102 | if (acl == NULL) | |
3103 | return Qnil; | |
3104 | ||
3105 | str = acl_to_text (acl, NULL); | |
3106 | if (str == NULL) | |
3107 | { | |
3108 | acl_free (acl); | |
3109 | return Qnil; | |
3110 | } | |
3111 | ||
3112 | acl_string = build_string (str); | |
3113 | acl_free (str); | |
3114 | acl_free (acl); | |
3115 | ||
3116 | return acl_string; | |
3117 | #endif | |
3118 | ||
3119 | return Qnil; | |
3120 | } | |
3121 | ||
3122 | DEFUN ("set-file-acl", Fset_file_acl, Sset_file_acl, | |
3123 | 2, 2, 0, | |
3124 | doc: /* Set ACL of file named FILENAME to ACL-STRING. | |
3125 | ACL-STRING should contain the textual representation of the ACL | |
3126 | entries in a format suitable for the platform. | |
3127 | ||
ccad023b EZ |
3128 | Value is t if setting of ACL was successful, nil otherwise. |
3129 | ||
7c3d167f RF |
3130 | Setting ACL for local files requires Emacs to be built with ACL |
3131 | support. */) | |
3132 | (Lisp_Object filename, Lisp_Object acl_string) | |
3133 | { | |
3134 | Lisp_Object absname; | |
3135 | Lisp_Object handler; | |
ffdc270a | 3136 | #ifdef HAVE_ACL_SET_FILE |
7c3d167f RF |
3137 | Lisp_Object encoded_absname; |
3138 | acl_t acl; | |
3139 | bool fail; | |
3140 | #endif | |
3141 | ||
3142 | absname = Fexpand_file_name (filename, BVAR (current_buffer, directory)); | |
3143 | ||
3144 | /* If the file name has special constructs in it, | |
3145 | call the corresponding file handler. */ | |
3146 | handler = Ffind_file_name_handler (absname, Qset_file_acl); | |
3147 | if (!NILP (handler)) | |
3148 | return call3 (handler, Qset_file_acl, absname, acl_string); | |
3149 | ||
ffdc270a | 3150 | #ifdef HAVE_ACL_SET_FILE |
7c3d167f RF |
3151 | if (STRINGP (acl_string)) |
3152 | { | |
3153 | acl = acl_from_text (SSDATA (acl_string)); | |
3154 | if (acl == NULL) | |
3155 | { | |
3156 | report_file_error ("Converting ACL", Fcons (absname, Qnil)); | |
3157 | return Qnil; | |
3158 | } | |
3159 | ||
3160 | encoded_absname = ENCODE_FILE (absname); | |
3161 | ||
3162 | fail = (acl_set_file (SSDATA (encoded_absname), ACL_TYPE_ACCESS, | |
3163 | acl) | |
3164 | != 0); | |
ffdc270a | 3165 | if (fail && acl_errno_valid (errno)) |
7c3d167f RF |
3166 | report_file_error ("Setting ACL", Fcons (absname, Qnil)); |
3167 | ||
3168 | acl_free (acl); | |
c1fea2c0 | 3169 | return fail ? Qnil : Qt; |
7c3d167f RF |
3170 | } |
3171 | #endif | |
3172 | ||
3173 | return Qnil; | |
3174 | } | |
3175 | \f | |
570d7624 | 3176 | DEFUN ("file-modes", Ffile_modes, Sfile_modes, 1, 1, 0, |
d4a42098 KS |
3177 | doc: /* Return mode bits of file named FILENAME, as an integer. |
3178 | Return nil, if file does not exist or is not accessible. */) | |
5842a27b | 3179 | (Lisp_Object filename) |
570d7624 | 3180 | { |
199607e4 | 3181 | Lisp_Object absname; |
570d7624 | 3182 | struct stat st; |
32f4334d | 3183 | Lisp_Object handler; |
570d7624 | 3184 | |
4b4deea2 | 3185 | absname = expand_and_dir_to_file (filename, BVAR (current_buffer, directory)); |
570d7624 | 3186 | |
32f4334d RS |
3187 | /* If the file name has special constructs in it, |
3188 | call the corresponding file handler. */ | |
199607e4 | 3189 | handler = Ffind_file_name_handler (absname, Qfile_modes); |
32f4334d | 3190 | if (!NILP (handler)) |
199607e4 | 3191 | return call2 (handler, Qfile_modes, absname); |
32f4334d | 3192 | |
b1d1b865 RS |
3193 | absname = ENCODE_FILE (absname); |
3194 | ||
42a5b22f | 3195 | if (stat (SSDATA (absname), &st) < 0) |
570d7624 | 3196 | return Qnil; |
3ace87e3 | 3197 | |
570d7624 JB |
3198 | return make_number (st.st_mode & 07777); |
3199 | } | |
3200 | ||
09fbdf6c MC |
3201 | DEFUN ("set-file-modes", Fset_file_modes, Sset_file_modes, 2, 2, |
3202 | "(let ((file (read-file-name \"File: \"))) \ | |
3203 | (list file (read-file-modes nil file)))", | |
8c1a1077 | 3204 | doc: /* Set mode bits of file named FILENAME to MODE (an integer). |
ea429250 EZ |
3205 | Only the 12 low bits of MODE are used. |
3206 | ||
3207 | Interactively, mode bits are read by `read-file-modes', which accepts | |
712adc82 | 3208 | symbolic notation, like the `chmod' command from GNU Coreutils. */) |
5842a27b | 3209 | (Lisp_Object filename, Lisp_Object mode) |
570d7624 | 3210 | { |
b1d1b865 | 3211 | Lisp_Object absname, encoded_absname; |
32f4334d | 3212 | Lisp_Object handler; |
570d7624 | 3213 | |
4b4deea2 | 3214 | absname = Fexpand_file_name (filename, BVAR (current_buffer, directory)); |
b7826503 | 3215 | CHECK_NUMBER (mode); |
570d7624 | 3216 | |
32f4334d RS |
3217 | /* If the file name has special constructs in it, |
3218 | call the corresponding file handler. */ | |
199607e4 | 3219 | handler = Ffind_file_name_handler (absname, Qset_file_modes); |
32f4334d | 3220 | if (!NILP (handler)) |
199607e4 | 3221 | return call3 (handler, Qset_file_modes, absname, mode); |
32f4334d | 3222 | |
b1d1b865 RS |
3223 | encoded_absname = ENCODE_FILE (absname); |
3224 | ||
18c52557 | 3225 | if (chmod (SSDATA (encoded_absname), XINT (mode) & 07777) < 0) |
199607e4 | 3226 | report_file_error ("Doing chmod", Fcons (absname, Qnil)); |
570d7624 JB |
3227 | |
3228 | return Qnil; | |
3229 | } | |
3230 | ||
c24e9a53 | 3231 | DEFUN ("set-default-file-modes", Fset_default_file_modes, Sset_default_file_modes, 1, 1, 0, |
8c1a1077 PJ |
3232 | doc: /* Set the file permission bits for newly created files. |
3233 | The argument MODE should be an integer; only the low 9 bits are used. | |
3234 | This setting is inherited by subprocesses. */) | |
5842a27b | 3235 | (Lisp_Object mode) |
36a8c287 | 3236 | { |
b7826503 | 3237 | CHECK_NUMBER (mode); |
199607e4 | 3238 | |
5f85ea58 | 3239 | umask ((~ XINT (mode)) & 0777); |
36a8c287 JB |
3240 | |
3241 | return Qnil; | |
3242 | } | |
3243 | ||
c24e9a53 | 3244 | DEFUN ("default-file-modes", Fdefault_file_modes, Sdefault_file_modes, 0, 0, 0, |
8c1a1077 PJ |
3245 | doc: /* Return the default file protection for created files. |
3246 | The value is an integer. */) | |
5842a27b | 3247 | (void) |
36a8c287 | 3248 | { |
f75d7a91 | 3249 | mode_t realmask; |
5f85ea58 | 3250 | Lisp_Object value; |
36a8c287 | 3251 | |
4d7e6e51 | 3252 | block_input (); |
5f85ea58 RS |
3253 | realmask = umask (0); |
3254 | umask (realmask); | |
4d7e6e51 | 3255 | unblock_input (); |
36a8c287 | 3256 | |
46283abe | 3257 | XSETINT (value, (~ realmask) & 0777); |
5f85ea58 | 3258 | return value; |
36a8c287 | 3259 | } |
819da85b | 3260 | \f |
819da85b EZ |
3261 | |
3262 | DEFUN ("set-file-times", Fset_file_times, Sset_file_times, 1, 2, 0, | |
f839df0c | 3263 | doc: /* Set times of file FILENAME to TIMESTAMP. |
819da85b EZ |
3264 | Set both access and modification times. |
3265 | Return t on success, else nil. | |
f839df0c | 3266 | Use the current time if TIMESTAMP is nil. TIMESTAMP is in the format of |
819da85b | 3267 | `current-time'. */) |
f839df0c | 3268 | (Lisp_Object filename, Lisp_Object timestamp) |
819da85b EZ |
3269 | { |
3270 | Lisp_Object absname, encoded_absname; | |
3271 | Lisp_Object handler; | |
31571fd7 | 3272 | EMACS_TIME t = lisp_time_argument (timestamp); |
819da85b | 3273 | |
4b4deea2 | 3274 | absname = Fexpand_file_name (filename, BVAR (current_buffer, directory)); |
819da85b EZ |
3275 | |
3276 | /* If the file name has special constructs in it, | |
3277 | call the corresponding file handler. */ | |
3278 | handler = Ffind_file_name_handler (absname, Qset_file_times); | |
3279 | if (!NILP (handler)) | |
f839df0c | 3280 | return call3 (handler, Qset_file_times, absname, timestamp); |
819da85b EZ |
3281 | |
3282 | encoded_absname = ENCODE_FILE (absname); | |
5df5e07c | 3283 | |
819da85b | 3284 | { |
d35af63c | 3285 | if (set_file_times (-1, SSDATA (encoded_absname), t, t)) |
819da85b | 3286 | { |
0d9f584b | 3287 | #ifdef MSDOS |
819da85b | 3288 | /* Setting times on a directory always fails. */ |
73dcdb9f | 3289 | if (file_directory_p (SSDATA (encoded_absname))) |
819da85b EZ |
3290 | return Qnil; |
3291 | #endif | |
3292 | report_file_error ("Setting file times", Fcons (absname, Qnil)); | |
819da85b EZ |
3293 | } |
3294 | } | |
5df5e07c | 3295 | |
819da85b EZ |
3296 | return Qt; |
3297 | } | |
f793dc6c | 3298 | \f |
697c17a2 | 3299 | #ifdef HAVE_SYNC |
85ffea93 | 3300 | DEFUN ("unix-sync", Funix_sync, Sunix_sync, 0, 0, "", |
8c1a1077 | 3301 | doc: /* Tell Unix to finish all pending disk updates. */) |
5842a27b | 3302 | (void) |
85ffea93 RS |
3303 | { |
3304 | sync (); | |
3305 | return Qnil; | |
3306 | } | |
3307 | ||
697c17a2 | 3308 | #endif /* HAVE_SYNC */ |
85ffea93 | 3309 | |
570d7624 | 3310 | DEFUN ("file-newer-than-file-p", Ffile_newer_than_file_p, Sfile_newer_than_file_p, 2, 2, 0, |
8c1a1077 PJ |
3311 | doc: /* Return t if file FILE1 is newer than file FILE2. |
3312 | If FILE1 does not exist, the answer is nil; | |
3313 | otherwise, if FILE2 does not exist, the answer is t. */) | |
5842a27b | 3314 | (Lisp_Object file1, Lisp_Object file2) |
570d7624 | 3315 | { |
199607e4 | 3316 | Lisp_Object absname1, absname2; |
39adff0d | 3317 | struct stat st1, st2; |
32f4334d | 3318 | Lisp_Object handler; |
09121adc | 3319 | struct gcpro gcpro1, gcpro2; |
570d7624 | 3320 | |
b7826503 PJ |
3321 | CHECK_STRING (file1); |
3322 | CHECK_STRING (file2); | |
570d7624 | 3323 | |
199607e4 RS |
3324 | absname1 = Qnil; |
3325 | GCPRO2 (absname1, file2); | |
4b4deea2 TT |
3326 | absname1 = expand_and_dir_to_file (file1, BVAR (current_buffer, directory)); |
3327 | absname2 = expand_and_dir_to_file (file2, BVAR (current_buffer, directory)); | |
09121adc | 3328 | UNGCPRO; |
570d7624 | 3329 | |
32f4334d RS |
3330 | /* If the file name has special constructs in it, |
3331 | call the corresponding file handler. */ | |
199607e4 | 3332 | handler = Ffind_file_name_handler (absname1, Qfile_newer_than_file_p); |
51cf6d37 | 3333 | if (NILP (handler)) |
199607e4 | 3334 | handler = Ffind_file_name_handler (absname2, Qfile_newer_than_file_p); |
32f4334d | 3335 | if (!NILP (handler)) |
199607e4 | 3336 | return call3 (handler, Qfile_newer_than_file_p, absname1, absname2); |
32f4334d | 3337 | |
b1d1b865 RS |
3338 | GCPRO2 (absname1, absname2); |
3339 | absname1 = ENCODE_FILE (absname1); | |
3340 | absname2 = ENCODE_FILE (absname2); | |
3341 | UNGCPRO; | |
3342 | ||
39adff0d | 3343 | if (stat (SSDATA (absname1), &st1) < 0) |
570d7624 JB |
3344 | return Qnil; |
3345 | ||
39adff0d | 3346 | if (stat (SSDATA (absname2), &st2) < 0) |
570d7624 JB |
3347 | return Qt; |
3348 | ||
39adff0d PE |
3349 | return (EMACS_TIME_GT (get_stat_mtime (&st1), get_stat_mtime (&st2)) |
3350 | ? Qt : Qnil); | |
570d7624 JB |
3351 | } |
3352 | \f | |
6fdaa9a0 KH |
3353 | #ifndef READ_BUF_SIZE |
3354 | #define READ_BUF_SIZE (64 << 10) | |
3355 | #endif | |
d311d28c PE |
3356 | /* Some buffer offsets are stored in 'int' variables. */ |
3357 | verify (READ_BUF_SIZE <= INT_MAX); | |
6fdaa9a0 | 3358 | |
98a7d268 KH |
3359 | /* This function is called after Lisp functions to decide a coding |
3360 | system are called, or when they cause an error. Before they are | |
3361 | called, the current buffer is set unibyte and it contains only a | |
3362 | newly inserted text (thus the buffer was empty before the | |
3363 | insertion). | |
3364 | ||
3365 | The functions may set markers, overlays, text properties, or even | |
3366 | alter the buffer contents, change the current buffer. | |
3367 | ||
3368 | Here, we reset all those changes by: | |
3369 | o set back the current buffer. | |
3370 | o move all markers and overlays to BEG. | |
3371 | o remove all text properties. | |
3372 | o set back the buffer multibyteness. */ | |
f736ffbf KH |
3373 | |
3374 | static Lisp_Object | |
971de7fb | 3375 | decide_coding_unwind (Lisp_Object unwind_data) |
f736ffbf | 3376 | { |
98a7d268 | 3377 | Lisp_Object multibyte, undo_list, buffer; |
f736ffbf | 3378 | |
98a7d268 KH |
3379 | multibyte = XCAR (unwind_data); |
3380 | unwind_data = XCDR (unwind_data); | |
3381 | undo_list = XCAR (unwind_data); | |
3382 | buffer = XCDR (unwind_data); | |
3383 | ||
a3d794a1 | 3384 | set_buffer_internal (XBUFFER (buffer)); |
98a7d268 KH |
3385 | adjust_markers_for_delete (BEG, BEG_BYTE, Z, Z_BYTE); |
3386 | adjust_overlays_for_delete (BEG, Z - BEG); | |
0c94c8d6 | 3387 | set_buffer_intervals (current_buffer, NULL); |
98a7d268 KH |
3388 | TEMP_SET_PT_BOTH (BEG, BEG_BYTE); |
3389 | ||
3390 | /* Now we are safe to change the buffer's multibyteness directly. */ | |
39eb03f1 PE |
3391 | bset_enable_multibyte_characters (current_buffer, multibyte); |
3392 | bset_undo_list (current_buffer, undo_list); | |
f736ffbf KH |
3393 | |
3394 | return Qnil; | |
3395 | } | |
3396 | ||
2ef88fd4 | 3397 | /* Read from a non-regular file. STATE is a Lisp_Save_Value |
3346c1d0 DA |
3398 | object where slot 0 is the file descriptor, slot 1 specifies |
3399 | an offset to put the read bytes, and slot 2 is the maximum | |
3400 | amount of bytes to read. Value is the number of bytes read. */ | |
55587f8a GM |
3401 | |
3402 | static Lisp_Object | |
2ef88fd4 | 3403 | read_non_regular (Lisp_Object state) |
55587f8a | 3404 | { |
d311d28c | 3405 | int nbytes; |
efdc16c9 | 3406 | |
1b978129 GM |
3407 | immediate_quit = 1; |
3408 | QUIT; | |
3346c1d0 | 3409 | nbytes = emacs_read (XSAVE_INTEGER (state, 0), |
5976c3fe | 3410 | ((char *) BEG_ADDR + PT_BYTE - BEG_BYTE |
3346c1d0 DA |
3411 | + XSAVE_INTEGER (state, 1)), |
3412 | XSAVE_INTEGER (state, 2)); | |
1b978129 | 3413 | immediate_quit = 0; |
e07469fa DA |
3414 | /* Fast recycle this object for the likely next call. */ |
3415 | free_misc (state); | |
1b978129 GM |
3416 | return make_number (nbytes); |
3417 | } | |
55587f8a | 3418 | |
2ef88fd4 DA |
3419 | |
3420 | /* Condition-case handler used when reading from non-regular files | |
3421 | in insert-file-contents. */ | |
1b978129 GM |
3422 | |
3423 | static Lisp_Object | |
2ef88fd4 | 3424 | read_non_regular_quit (Lisp_Object ignore) |
1b978129 | 3425 | { |
55587f8a GM |
3426 | return Qnil; |
3427 | } | |
3428 | ||
b3fbb395 PE |
3429 | /* Return the file offset that VAL represents, checking for type |
3430 | errors and overflow. */ | |
e69dafad | 3431 | static off_t |
b3fbb395 | 3432 | file_offset (Lisp_Object val) |
e69dafad | 3433 | { |
b3fbb395 PE |
3434 | if (RANGED_INTEGERP (0, val, TYPE_MAXIMUM (off_t))) |
3435 | return XINT (val); | |
3436 | ||
3437 | if (FLOATP (val)) | |
e69dafad | 3438 | { |
b3fbb395 | 3439 | double v = XFLOAT_DATA (val); |
7216e43b | 3440 | if (0 <= v |
b3fbb395 PE |
3441 | && (sizeof (off_t) < sizeof v |
3442 | ? v <= TYPE_MAXIMUM (off_t) | |
3443 | : v < TYPE_MAXIMUM (off_t))) | |
3444 | return v; | |
e69dafad | 3445 | } |
b3fbb395 PE |
3446 | |
3447 | wrong_type_argument (intern ("file-offset"), val); | |
e69dafad PE |
3448 | } |
3449 | ||
f0941253 | 3450 | /* Return a special time value indicating the error number ERRNUM. */ |
dbeed9a6 | 3451 | static EMACS_TIME |
f0941253 | 3452 | time_error_value (int errnum) |
dbeed9a6 | 3453 | { |
0497dc44 | 3454 | int ns = (errnum == ENOENT || errnum == EACCES || errnum == ENOTDIR |
dbeed9a6 PE |
3455 | ? NONEXISTENT_MODTIME_NSECS |
3456 | : UNKNOWN_MODTIME_NSECS); | |
e9a9ae03 | 3457 | return make_emacs_time (0, ns); |
dbeed9a6 | 3458 | } |
55587f8a | 3459 | |
570d7624 | 3460 | DEFUN ("insert-file-contents", Finsert_file_contents, Sinsert_file_contents, |
8c1a1077 PJ |
3461 | 1, 5, 0, |
3462 | doc: /* Insert contents of file FILENAME after point. | |
cf6d2357 | 3463 | Returns list of absolute file name and number of characters inserted. |
6f2528d8 MR |
3464 | If second argument VISIT is non-nil, the buffer's visited filename and |
3465 | last save file modtime are set, and it is marked unmodified. If | |
3466 | visiting and the file does not exist, visiting is completed before the | |
3467 | error is signaled. | |
3468 | ||
3469 | The optional third and fourth arguments BEG and END specify what portion | |
3470 | of the file to insert. These arguments count bytes in the file, not | |
3471 | characters in the buffer. If VISIT is non-nil, BEG and END must be nil. | |
3472 | ||
3473 | If optional fifth argument REPLACE is non-nil, replace the current | |
3474 | buffer contents (in the accessible portion) with the file contents. | |
3475 | This is better than simply deleting and inserting the whole thing | |
3476 | because (1) it preserves some marker positions and (2) it puts less data | |
3477 | in the undo list. When REPLACE is non-nil, the second return value is | |
3478 | the number of characters that replace previous buffer contents. | |
3479 | ||
3480 | This function does code conversion according to the value of | |
3481 | `coding-system-for-read' or `file-coding-system-alist', and sets the | |
bb085aed EZ |
3482 | variable `last-coding-system-used' to the coding system actually used. |
3483 | ||
3484 | In addition, this function decodes the inserted text from known formats | |
3485 | by calling `format-decode', which see. */) | |
5842a27b | 3486 | (Lisp_Object filename, Lisp_Object visit, Lisp_Object beg, Lisp_Object end, Lisp_Object replace) |
570d7624 JB |
3487 | { |
3488 | struct stat st; | |
dbeed9a6 | 3489 | EMACS_TIME mtime; |
f75d7a91 | 3490 | int fd; |
d311d28c | 3491 | ptrdiff_t inserted = 0; |
f75d7a91 PE |
3492 | bool nochange = 0; |
3493 | ptrdiff_t how_much; | |
728f8f0a | 3494 | off_t beg_offset, end_offset; |
f75d7a91 | 3495 | int unprocessed; |
d311d28c | 3496 | ptrdiff_t count = SPECPDL_INDEX (); |
6f2528d8 MR |
3497 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4, gcpro5; |
3498 | Lisp_Object handler, val, insval, orig_filename, old_undo; | |
d6a3cc15 | 3499 | Lisp_Object p; |
d311d28c | 3500 | ptrdiff_t total = 0; |
f75d7a91 | 3501 | bool not_regular = 0; |
2ef88fd4 | 3502 | int save_errno = 0; |
5976c3fe | 3503 | char read_buf[READ_BUF_SIZE]; |
6fdaa9a0 | 3504 | struct coding_system coding; |
f75d7a91 PE |
3505 | bool replace_handled = 0; |
3506 | bool set_coding_system = 0; | |
db327c7e | 3507 | Lisp_Object coding_system; |
f75d7a91 | 3508 | bool read_quit = 0; |
22513e52 SM |
3509 | /* If the undo log only contains the insertion, there's no point |
3510 | keeping it. It's typically when we first fill a file-buffer. */ | |
3511 | bool empty_undo_list_p | |
3512 | = (!NILP (visit) && NILP (BVAR (current_buffer, undo_list)) | |
3513 | && BEG == Z); | |
490ee853 | 3514 | Lisp_Object old_Vdeactivate_mark = Vdeactivate_mark; |
f75d7a91 PE |
3515 | bool we_locked_file = 0; |
3516 | bool deferred_remove_unwind_protect = 0; | |
32f4334d | 3517 | |
95385625 RS |
3518 | if (current_buffer->base_buffer && ! NILP (visit)) |
3519 | error ("Cannot do file visiting in an indirect buffer"); | |
3520 | ||
4b4deea2 | 3521 | if (!NILP (BVAR (current_buffer, read_only))) |
95385625 RS |
3522 | Fbarf_if_buffer_read_only (); |
3523 | ||
32f4334d | 3524 | val = Qnil; |
d6a3cc15 | 3525 | p = Qnil; |
b1d1b865 | 3526 | orig_filename = Qnil; |
6f2528d8 | 3527 | old_undo = Qnil; |
32f4334d | 3528 | |
6f2528d8 | 3529 | GCPRO5 (filename, val, p, orig_filename, old_undo); |
570d7624 | 3530 | |
b7826503 | 3531 | CHECK_STRING (filename); |
570d7624 JB |
3532 | filename = Fexpand_file_name (filename, Qnil); |
3533 | ||
1c157f8d KH |
3534 | /* The value Qnil means that the coding system is not yet |
3535 | decided. */ | |
3536 | coding_system = Qnil; | |
3537 | ||
32f4334d RS |
3538 | /* If the file name has special constructs in it, |
3539 | call the corresponding file handler. */ | |
49307295 | 3540 | handler = Ffind_file_name_handler (filename, Qinsert_file_contents); |
32f4334d RS |
3541 | if (!NILP (handler)) |
3542 | { | |
3d0387c0 RS |
3543 | val = call6 (handler, Qinsert_file_contents, filename, |
3544 | visit, beg, end, replace); | |
d311d28c PE |
3545 | if (CONSP (val) && CONSP (XCDR (val)) |
3546 | && RANGED_INTEGERP (0, XCAR (XCDR (val)), ZV - PT)) | |
03699b14 | 3547 | inserted = XINT (XCAR (XCDR (val))); |
32f4334d RS |
3548 | goto handled; |
3549 | } | |
3550 | ||
b1d1b865 RS |
3551 | orig_filename = filename; |
3552 | filename = ENCODE_FILE (filename); | |
3553 | ||
67722112 PE |
3554 | fd = emacs_open (SSDATA (filename), O_RDONLY, 0); |
3555 | if (fd < 0) | |
570d7624 | 3556 | { |
e5e9d610 | 3557 | save_errno = errno; |
265a9e55 | 3558 | if (NILP (visit)) |
b1d1b865 | 3559 | report_file_error ("Opening input file", Fcons (orig_filename, Qnil)); |
f0941253 | 3560 | mtime = time_error_value (save_errno); |
b885bf36 | 3561 | st.st_size = -1; |
0de6b8f4 | 3562 | if (!NILP (Vcoding_system_for_read)) |
22d92d6b | 3563 | Fset (Qbuffer_file_coding_system, Vcoding_system_for_read); |
570d7624 JB |
3564 | goto notfound; |
3565 | } | |
3566 | ||
67722112 PE |
3567 | /* Replacement should preserve point as it preserves markers. */ |
3568 | if (!NILP (replace)) | |
3569 | record_unwind_protect (restore_point_unwind, Fpoint_marker ()); | |
3570 | ||
3571 | record_unwind_protect (close_file_unwind, make_number (fd)); | |
3572 | ||
3573 | if (fstat (fd, &st) != 0) | |
fa705c99 | 3574 | report_file_error ("Input file status", Fcons (orig_filename, Qnil)); |
67722112 PE |
3575 | mtime = get_stat_mtime (&st); |
3576 | ||
be53b411 JB |
3577 | /* This code will need to be changed in order to work on named |
3578 | pipes, and it's probably just not worth it. So we should at | |
3579 | least signal an error. */ | |
99bc28f4 | 3580 | if (!S_ISREG (st.st_mode)) |
330bfe57 | 3581 | { |
d4b8687b RS |
3582 | not_regular = 1; |
3583 | ||
3584 | if (! NILP (visit)) | |
3585 | goto notfound; | |
3586 | ||
3587 | if (! NILP (replace) || ! NILP (beg) || ! NILP (end)) | |
24b1ddad KS |
3588 | xsignal2 (Qfile_error, |
3589 | build_string ("not a regular file"), orig_filename); | |
330bfe57 | 3590 | } |
be53b411 | 3591 | |
9f57b6b4 KH |
3592 | if (!NILP (visit)) |
3593 | { | |
3594 | if (!NILP (beg) || !NILP (end)) | |
3595 | error ("Attempt to visit less than an entire file"); | |
3596 | if (BEG < Z && NILP (replace)) | |
3597 | error ("Cannot do file visiting in a non-empty buffer"); | |
3598 | } | |
7fded690 JB |
3599 | |
3600 | if (!NILP (beg)) | |
b3fbb395 | 3601 | beg_offset = file_offset (beg); |
7fded690 | 3602 | else |
728f8f0a | 3603 | beg_offset = 0; |
7fded690 JB |
3604 | |
3605 | if (!NILP (end)) | |
b3fbb395 | 3606 | end_offset = file_offset (end); |
7fded690 JB |
3607 | else |
3608 | { | |
728f8f0a PE |
3609 | if (not_regular) |
3610 | end_offset = TYPE_MAXIMUM (off_t); | |
3611 | else | |
d4b8687b | 3612 | { |
728f8f0a PE |
3613 | end_offset = st.st_size; |
3614 | ||
3615 | /* A negative size can happen on a platform that allows file | |
3616 | sizes greater than the maximum off_t value. */ | |
3617 | if (end_offset < 0) | |
3618 | buffer_overflow (); | |
68c45bf0 | 3619 | |
d21dd12d GM |
3620 | /* The file size returned from stat may be zero, but data |
3621 | may be readable nonetheless, for example when this is a | |
3622 | file in the /proc filesystem. */ | |
728f8f0a PE |
3623 | if (end_offset == 0) |
3624 | end_offset = READ_BUF_SIZE; | |
d4b8687b | 3625 | } |
7fded690 JB |
3626 | } |
3627 | ||
728f8f0a PE |
3628 | /* Check now whether the buffer will become too large, |
3629 | in the likely case where the file's length is not changing. | |
3630 | This saves a lot of needless work before a buffer overflow. */ | |
3631 | if (! not_regular) | |
3632 | { | |
3633 | /* The likely offset where we will stop reading. We could read | |
3634 | more (or less), if the file grows (or shrinks) as we read it. */ | |
3635 | off_t likely_end = min (end_offset, st.st_size); | |
3636 | ||
3637 | if (beg_offset < likely_end) | |
3638 | { | |
ce2fe65a AS |
3639 | ptrdiff_t buf_bytes |
3640 | = Z_BYTE - (!NILP (replace) ? ZV_BYTE - BEGV_BYTE : 0); | |
728f8f0a PE |
3641 | ptrdiff_t buf_growth_max = BUF_BYTES_MAX - buf_bytes; |
3642 | off_t likely_growth = likely_end - beg_offset; | |
3643 | if (buf_growth_max < likely_growth) | |
3644 | buffer_overflow (); | |
3645 | } | |
3646 | } | |
3647 | ||
3648 | /* Prevent redisplay optimizations. */ | |
3649 | current_buffer->clip_changed = 1; | |
3650 | ||
356a6224 | 3651 | if (EQ (Vcoding_system_for_read, Qauto_save_coding)) |
5560aecd | 3652 | { |
75421805 | 3653 | coding_system = coding_inherit_eol_type (Qutf_8_emacs, Qunix); |
5560aecd KH |
3654 | setup_coding_system (coding_system, &coding); |
3655 | /* Ensure we set Vlast_coding_system_used. */ | |
3656 | set_coding_system = 1; | |
3657 | } | |
356a6224 | 3658 | else if (BEG < Z) |
f736ffbf KH |
3659 | { |
3660 | /* Decide the coding system to use for reading the file now | |
3661 | because we can't use an optimized method for handling | |
3662 | `coding:' tag if the current buffer is not empty. */ | |
f736ffbf | 3663 | if (!NILP (Vcoding_system_for_read)) |
db327c7e | 3664 | coding_system = Vcoding_system_for_read; |
f736ffbf KH |
3665 | else |
3666 | { | |
3667 | /* Don't try looking inside a file for a coding system | |
3668 | specification if it is not seekable. */ | |
3669 | if (! not_regular && ! NILP (Vset_auto_coding_function)) | |
3670 | { | |
3671 | /* Find a coding system specified in the heading two | |
3672 | lines or in the tailing several lines of the file. | |
3673 | We assume that the 1K-byte and 3K-byte for heading | |
003a7eaa | 3674 | and tailing respectively are sufficient for this |
f736ffbf | 3675 | purpose. */ |
d311d28c | 3676 | int nread; |
f736ffbf KH |
3677 | |
3678 | if (st.st_size <= (1024 * 4)) | |
68c45bf0 | 3679 | nread = emacs_read (fd, read_buf, 1024 * 4); |
f736ffbf KH |
3680 | else |
3681 | { | |
68c45bf0 | 3682 | nread = emacs_read (fd, read_buf, 1024); |
4c95c9a5 | 3683 | if (nread == 1024) |
f736ffbf | 3684 | { |
4c95c9a5 PE |
3685 | int ntail; |
3686 | if (lseek (fd, - (1024 * 3), SEEK_END) < 0) | |
f736ffbf KH |
3687 | report_file_error ("Setting file position", |
3688 | Fcons (orig_filename, Qnil)); | |
4c95c9a5 PE |
3689 | ntail = emacs_read (fd, read_buf + nread, 1024 * 3); |
3690 | nread = ntail < 0 ? ntail : nread + ntail; | |
f736ffbf KH |
3691 | } |
3692 | } | |
feb9dc27 | 3693 | |
f736ffbf KH |
3694 | if (nread < 0) |
3695 | error ("IO error reading %s: %s", | |
d5db4077 | 3696 | SDATA (orig_filename), emacs_strerror (errno)); |
f736ffbf KH |
3697 | else if (nread > 0) |
3698 | { | |
f736ffbf | 3699 | struct buffer *prev = current_buffer; |
f839df0c | 3700 | Lisp_Object workbuf; |
685fc579 | 3701 | struct buffer *buf; |
f736ffbf | 3702 | |
66322887 | 3703 | record_unwind_current_buffer (); |
1d92afcd | 3704 | |
f839df0c PE |
3705 | workbuf = Fget_buffer_create (build_string (" *code-converting-work*")); |
3706 | buf = XBUFFER (workbuf); | |
685fc579 | 3707 | |
29ea8ae9 | 3708 | delete_all_overlays (buf); |
39eb03f1 PE |
3709 | bset_directory (buf, BVAR (current_buffer, directory)); |
3710 | bset_read_only (buf, Qnil); | |
3711 | bset_filename (buf, Qnil); | |
3712 | bset_undo_list (buf, Qt); | |
fd318b54 DA |
3713 | eassert (buf->overlays_before == NULL); |
3714 | eassert (buf->overlays_after == NULL); | |
efdc16c9 | 3715 | |
685fc579 RS |
3716 | set_buffer_internal (buf); |
3717 | Ferase_buffer (); | |
39eb03f1 | 3718 | bset_enable_multibyte_characters (buf, Qnil); |
685fc579 | 3719 | |
b68864e5 | 3720 | insert_1_both ((char *) read_buf, nread, nread, 0, 0, 0); |
f736ffbf | 3721 | TEMP_SET_PT_BOTH (BEG, BEG_BYTE); |
db327c7e | 3722 | coding_system = call2 (Vset_auto_coding_function, |
8f924df7 | 3723 | filename, make_number (nread)); |
f736ffbf | 3724 | set_buffer_internal (prev); |
efdc16c9 | 3725 | |
f736ffbf KH |
3726 | /* Discard the unwind protect for recovering the |
3727 | current buffer. */ | |
3728 | specpdl_ptr--; | |
3729 | ||
3730 | /* Rewind the file for the actual read done later. */ | |
e69dafad | 3731 | if (lseek (fd, 0, SEEK_SET) < 0) |
f736ffbf KH |
3732 | report_file_error ("Setting file position", |
3733 | Fcons (orig_filename, Qnil)); | |
3734 | } | |
3735 | } | |
feb9dc27 | 3736 | |
db327c7e | 3737 | if (NILP (coding_system)) |
f736ffbf KH |
3738 | { |
3739 | /* If we have not yet decided a coding system, check | |
3740 | file-coding-system-alist. */ | |
8f924df7 | 3741 | Lisp_Object args[6]; |
f736ffbf KH |
3742 | |
3743 | args[0] = Qinsert_file_contents, args[1] = orig_filename; | |
3744 | args[2] = visit, args[3] = beg, args[4] = end, args[5] = replace; | |
8f924df7 KH |
3745 | coding_system = Ffind_operation_coding_system (6, args); |
3746 | if (CONSP (coding_system)) | |
3747 | coding_system = XCAR (coding_system); | |
f736ffbf KH |
3748 | } |
3749 | } | |
c9e82392 | 3750 | |
db327c7e KH |
3751 | if (NILP (coding_system)) |
3752 | coding_system = Qundecided; | |
3753 | else | |
3754 | CHECK_CODING_SYSTEM (coding_system); | |
c8a6d68a | 3755 | |
4b4deea2 | 3756 | if (NILP (BVAR (current_buffer, enable_multibyte_characters))) |
237a6fd2 RS |
3757 | /* We must suppress all character code conversion except for |
3758 | end-of-line conversion. */ | |
db327c7e | 3759 | coding_system = raw_text_coding_system (coding_system); |
54369368 | 3760 | |
db327c7e KH |
3761 | setup_coding_system (coding_system, &coding); |
3762 | /* Ensure we set Vlast_coding_system_used. */ | |
3763 | set_coding_system = 1; | |
f736ffbf | 3764 | } |
6cf71bf1 | 3765 | |
3d0387c0 RS |
3766 | /* If requested, replace the accessible part of the buffer |
3767 | with the file contents. Avoid replacing text at the | |
3768 | beginning or end of the buffer that matches the file contents; | |
3dbcf3f6 RS |
3769 | that preserves markers pointing to the unchanged parts. |
3770 | ||
3771 | Here we implement this feature in an optimized way | |
3772 | for the case where code conversion is NOT needed. | |
3773 | The following if-statement handles the case of conversion | |
727a0b4a RS |
3774 | in a less optimal way. |
3775 | ||
3776 | If the code conversion is "automatic" then we try using this | |
3777 | method and hope for the best. | |
3778 | But if we discover the need for conversion, we give up on this method | |
3779 | and let the following if-statement handle the replace job. */ | |
3dbcf3f6 | 3780 | if (!NILP (replace) |
f736ffbf | 3781 | && BEGV < ZV |
db327c7e KH |
3782 | && (NILP (coding_system) |
3783 | || ! CODING_REQUIRE_DECODING (&coding))) | |
3d0387c0 | 3784 | { |
ec7adf26 RS |
3785 | /* same_at_start and same_at_end count bytes, |
3786 | because file access counts bytes | |
3787 | and BEG and END count bytes. */ | |
d311d28c PE |
3788 | ptrdiff_t same_at_start = BEGV_BYTE; |
3789 | ptrdiff_t same_at_end = ZV_BYTE; | |
3790 | ptrdiff_t overlap; | |
6fdaa9a0 | 3791 | /* There is still a possibility we will find the need to do code |
f75d7a91 | 3792 | conversion. If that happens, set this variable to |
727a0b4a | 3793 | give up on handling REPLACE in the optimized way. */ |
f75d7a91 | 3794 | bool giveup_match_end = 0; |
9c28748f | 3795 | |
728f8f0a | 3796 | if (beg_offset != 0) |
4d2a0879 | 3797 | { |
728f8f0a | 3798 | if (lseek (fd, beg_offset, SEEK_SET) < 0) |
4d2a0879 | 3799 | report_file_error ("Setting file position", |
b1d1b865 | 3800 | Fcons (orig_filename, Qnil)); |
4d2a0879 RS |
3801 | } |
3802 | ||
3d0387c0 RS |
3803 | immediate_quit = 1; |
3804 | QUIT; | |
3805 | /* Count how many chars at the start of the file | |
3806 | match the text at the beginning of the buffer. */ | |
3807 | while (1) | |
3808 | { | |
d311d28c | 3809 | int nread, bufpos; |
3d0387c0 | 3810 | |
2ef88fd4 | 3811 | nread = emacs_read (fd, read_buf, sizeof read_buf); |
3d0387c0 RS |
3812 | if (nread < 0) |
3813 | error ("IO error reading %s: %s", | |
5976c3fe | 3814 | SSDATA (orig_filename), emacs_strerror (errno)); |
3d0387c0 RS |
3815 | else if (nread == 0) |
3816 | break; | |
6fdaa9a0 | 3817 | |
db327c7e | 3818 | if (CODING_REQUIRE_DETECTION (&coding)) |
727a0b4a | 3819 | { |
2ef88fd4 | 3820 | coding_system = detect_coding_system ((unsigned char *) read_buf, |
5976c3fe | 3821 | nread, nread, 1, 0, |
db327c7e KH |
3822 | coding_system); |
3823 | setup_coding_system (coding_system, &coding); | |
727a0b4a RS |
3824 | } |
3825 | ||
db327c7e KH |
3826 | if (CODING_REQUIRE_DECODING (&coding)) |
3827 | /* We found that the file should be decoded somehow. | |
727a0b4a RS |
3828 | Let's give up here. */ |
3829 | { | |
3830 | giveup_match_end = 1; | |
3831 | break; | |
3832 | } | |
3833 | ||
3d0387c0 | 3834 | bufpos = 0; |
ec7adf26 | 3835 | while (bufpos < nread && same_at_start < ZV_BYTE |
2ef88fd4 | 3836 | && FETCH_BYTE (same_at_start) == read_buf[bufpos]) |
3d0387c0 RS |
3837 | same_at_start++, bufpos++; |
3838 | /* If we found a discrepancy, stop the scan. | |
8e6208c5 | 3839 | Otherwise loop around and scan the next bufferful. */ |
3d0387c0 RS |
3840 | if (bufpos != nread) |
3841 | break; | |
3842 | } | |
3843 | immediate_quit = 0; | |
3844 | /* If the file matches the buffer completely, | |
3845 | there's no need to replace anything. */ | |
2ba8e008 | 3846 | if (same_at_start - BEGV_BYTE == end_offset - beg_offset) |
3d0387c0 | 3847 | { |
68c45bf0 | 3848 | emacs_close (fd); |
a1d2b64a | 3849 | specpdl_ptr--; |
1051b3b3 | 3850 | /* Truncate the buffer to the size of the file. */ |
7dae4502 | 3851 | del_range_1 (same_at_start, same_at_end, 0, 0); |
3d0387c0 RS |
3852 | goto handled; |
3853 | } | |
3854 | immediate_quit = 1; | |
3855 | QUIT; | |
3856 | /* Count how many chars at the end of the file | |
6fdaa9a0 KH |
3857 | match the text at the end of the buffer. But, if we have |
3858 | already found that decoding is necessary, don't waste time. */ | |
3859 | while (!giveup_match_end) | |
3d0387c0 | 3860 | { |
728f8f0a PE |
3861 | int total_read, nread, bufpos, trial; |
3862 | off_t curpos; | |
3d0387c0 RS |
3863 | |
3864 | /* At what file position are we now scanning? */ | |
728f8f0a | 3865 | curpos = end_offset - (ZV_BYTE - same_at_end); |
fc81fa9e KH |
3866 | /* If the entire file matches the buffer tail, stop the scan. */ |
3867 | if (curpos == 0) | |
3868 | break; | |
3d0387c0 | 3869 | /* How much can we scan in the next step? */ |
2ef88fd4 | 3870 | trial = min (curpos, sizeof read_buf); |
728f8f0a | 3871 | if (lseek (fd, curpos - trial, SEEK_SET) < 0) |
3d0387c0 | 3872 | report_file_error ("Setting file position", |
b1d1b865 | 3873 | Fcons (orig_filename, Qnil)); |
3d0387c0 | 3874 | |
b02439c8 | 3875 | total_read = nread = 0; |
3d0387c0 RS |
3876 | while (total_read < trial) |
3877 | { | |
2ef88fd4 | 3878 | nread = emacs_read (fd, read_buf + total_read, trial - total_read); |
2bd2273e | 3879 | if (nread < 0) |
3d0387c0 | 3880 | error ("IO error reading %s: %s", |
d5db4077 | 3881 | SDATA (orig_filename), emacs_strerror (errno)); |
2bd2273e GM |
3882 | else if (nread == 0) |
3883 | break; | |
3d0387c0 RS |
3884 | total_read += nread; |
3885 | } | |
efdc16c9 | 3886 | |
8e6208c5 | 3887 | /* Scan this bufferful from the end, comparing with |
3d0387c0 RS |
3888 | the Emacs buffer. */ |
3889 | bufpos = total_read; | |
efdc16c9 | 3890 | |
3d0387c0 RS |
3891 | /* Compare with same_at_start to avoid counting some buffer text |
3892 | as matching both at the file's beginning and at the end. */ | |
3893 | while (bufpos > 0 && same_at_end > same_at_start | |
2ef88fd4 | 3894 | && FETCH_BYTE (same_at_end - 1) == read_buf[bufpos - 1]) |
3d0387c0 | 3895 | same_at_end--, bufpos--; |
727a0b4a | 3896 | |
3d0387c0 | 3897 | /* If we found a discrepancy, stop the scan. |
8e6208c5 | 3898 | Otherwise loop around and scan the preceding bufferful. */ |
3d0387c0 | 3899 | if (bufpos != 0) |
727a0b4a RS |
3900 | { |
3901 | /* If this discrepancy is because of code conversion, | |
3902 | we cannot use this method; giveup and try the other. */ | |
3903 | if (same_at_end > same_at_start | |
3904 | && FETCH_BYTE (same_at_end - 1) >= 0200 | |
4b4deea2 | 3905 | && ! NILP (BVAR (current_buffer, enable_multibyte_characters)) |
c8a6d68a | 3906 | && (CODING_MAY_REQUIRE_DECODING (&coding))) |
727a0b4a RS |
3907 | giveup_match_end = 1; |
3908 | break; | |
3909 | } | |
b02439c8 GM |
3910 | |
3911 | if (nread == 0) | |
3912 | break; | |
3d0387c0 RS |
3913 | } |
3914 | immediate_quit = 0; | |
9c28748f | 3915 | |
727a0b4a RS |
3916 | if (! giveup_match_end) |
3917 | { | |
d311d28c | 3918 | ptrdiff_t temp; |
ec7adf26 | 3919 | |
727a0b4a | 3920 | /* We win! We can handle REPLACE the optimized way. */ |
9c28748f | 3921 | |
20f6783d RS |
3922 | /* Extend the start of non-matching text area to multibyte |
3923 | character boundary. */ | |
4b4deea2 | 3924 | if (! NILP (BVAR (current_buffer, enable_multibyte_characters))) |
20f6783d RS |
3925 | while (same_at_start > BEGV_BYTE |
3926 | && ! CHAR_HEAD_P (FETCH_BYTE (same_at_start))) | |
3927 | same_at_start--; | |
3928 | ||
3929 | /* Extend the end of non-matching text area to multibyte | |
71312b68 | 3930 | character boundary. */ |
4b4deea2 | 3931 | if (! NILP (BVAR (current_buffer, enable_multibyte_characters))) |
ec7adf26 RS |
3932 | while (same_at_end < ZV_BYTE |
3933 | && ! CHAR_HEAD_P (FETCH_BYTE (same_at_end))) | |
71312b68 RS |
3934 | same_at_end++; |
3935 | ||
727a0b4a | 3936 | /* Don't try to reuse the same piece of text twice. */ |
ec7adf26 | 3937 | overlap = (same_at_start - BEGV_BYTE |
728f8f0a PE |
3938 | - (same_at_end |
3939 | + (! NILP (end) ? end_offset : st.st_size) - ZV_BYTE)); | |
727a0b4a RS |
3940 | if (overlap > 0) |
3941 | same_at_end += overlap; | |
9c28748f | 3942 | |
727a0b4a | 3943 | /* Arrange to read only the nonmatching middle part of the file. */ |
728f8f0a PE |
3944 | beg_offset += same_at_start - BEGV_BYTE; |
3945 | end_offset -= ZV_BYTE - same_at_end; | |
3dbcf3f6 | 3946 | |
ec7adf26 | 3947 | del_range_byte (same_at_start, same_at_end, 0); |
727a0b4a | 3948 | /* Insert from the file at the proper position. */ |
ec7adf26 RS |
3949 | temp = BYTE_TO_CHAR (same_at_start); |
3950 | SET_PT_BOTH (temp, same_at_start); | |
727a0b4a RS |
3951 | |
3952 | /* If display currently starts at beginning of line, | |
3953 | keep it that way. */ | |
e74aeda8 | 3954 | if (XBUFFER (XWINDOW (selected_window)->contents) == current_buffer) |
c98ff5dd | 3955 | XWINDOW (selected_window)->start_at_line_beg = !NILP (Fbolp ()); |
727a0b4a RS |
3956 | |
3957 | replace_handled = 1; | |
3958 | } | |
3dbcf3f6 RS |
3959 | } |
3960 | ||
3961 | /* If requested, replace the accessible part of the buffer | |
3962 | with the file contents. Avoid replacing text at the | |
3963 | beginning or end of the buffer that matches the file contents; | |
3964 | that preserves markers pointing to the unchanged parts. | |
3965 | ||
3966 | Here we implement this feature for the case where code conversion | |
3967 | is needed, in a simple way that needs a lot of memory. | |
3968 | The preceding if-statement handles the case of no conversion | |
3969 | in a more optimized way. */ | |
f736ffbf | 3970 | if (!NILP (replace) && ! replace_handled && BEGV < ZV) |
3dbcf3f6 | 3971 | { |
d311d28c PE |
3972 | ptrdiff_t same_at_start = BEGV_BYTE; |
3973 | ptrdiff_t same_at_end = ZV_BYTE; | |
3974 | ptrdiff_t same_at_start_charpos; | |
3975 | ptrdiff_t inserted_chars; | |
3976 | ptrdiff_t overlap; | |
3977 | ptrdiff_t bufpos; | |
db327c7e | 3978 | unsigned char *decoded; |
d311d28c PE |
3979 | ptrdiff_t temp; |
3980 | ptrdiff_t this = 0; | |
3981 | ptrdiff_t this_count = SPECPDL_INDEX (); | |
f10fe38f PE |
3982 | bool multibyte |
3983 | = ! NILP (BVAR (current_buffer, enable_multibyte_characters)); | |
5b359650 | 3984 | Lisp_Object conversion_buffer; |
83aca1cb | 3985 | struct gcpro gcpro1; |
db327c7e | 3986 | |
5b359650 | 3987 | conversion_buffer = code_conversion_save (1, multibyte); |
3dbcf3f6 RS |
3988 | |
3989 | /* First read the whole file, performing code conversion into | |
3990 | CONVERSION_BUFFER. */ | |
3991 | ||
728f8f0a | 3992 | if (lseek (fd, beg_offset, SEEK_SET) < 0) |
8f924df7 KH |
3993 | report_file_error ("Setting file position", |
3994 | Fcons (orig_filename, Qnil)); | |
727a0b4a | 3995 | |
3dbcf3f6 RS |
3996 | inserted = 0; /* Bytes put into CONVERSION_BUFFER so far. */ |
3997 | unprocessed = 0; /* Bytes not processed in previous loop. */ | |
3998 | ||
2ba48777 | 3999 | GCPRO1 (conversion_buffer); |
b41b8a7e | 4000 | while (1) |
3dbcf3f6 | 4001 | { |
b41b8a7e PE |
4002 | /* Read at most READ_BUF_SIZE bytes at a time, to allow |
4003 | quitting while reading a huge file. */ | |
3dbcf3f6 RS |
4004 | |
4005 | /* Allow quitting out of the actual I/O. */ | |
4006 | immediate_quit = 1; | |
4007 | QUIT; | |
b41b8a7e PE |
4008 | this = emacs_read (fd, read_buf + unprocessed, |
4009 | READ_BUF_SIZE - unprocessed); | |
3dbcf3f6 RS |
4010 | immediate_quit = 0; |
4011 | ||
db327c7e | 4012 | if (this <= 0) |
43aae36e | 4013 | break; |
3dbcf3f6 | 4014 | |
bf1c0f27 SM |
4015 | BUF_TEMP_SET_PT (XBUFFER (conversion_buffer), |
4016 | BUF_Z (XBUFFER (conversion_buffer))); | |
5976c3fe PE |
4017 | decode_coding_c_string (&coding, (unsigned char *) read_buf, |
4018 | unprocessed + this, conversion_buffer); | |
db327c7e KH |
4019 | unprocessed = coding.carryover_bytes; |
4020 | if (coding.carryover_bytes > 0) | |
72af86bd | 4021 | memcpy (read_buf, coding.carryover, unprocessed); |
3dbcf3f6 | 4022 | } |
2ba48777 | 4023 | UNGCPRO; |
db327c7e | 4024 | emacs_close (fd); |
3dbcf3f6 | 4025 | |
db65a627 CY |
4026 | /* We should remove the unwind_protect calling |
4027 | close_file_unwind, but other stuff has been added the stack, | |
4028 | so defer the removal till we reach the `handled' label. */ | |
4029 | deferred_remove_unwind_protect = 1; | |
4030 | ||
43aae36e | 4031 | if (this < 0) |
4ed925c6 MB |
4032 | error ("IO error reading %s: %s", |
4033 | SDATA (orig_filename), emacs_strerror (errno)); | |
3dbcf3f6 | 4034 | |
db327c7e KH |
4035 | if (unprocessed > 0) |
4036 | { | |
4037 | coding.mode |= CODING_MODE_LAST_BLOCK; | |
5976c3fe PE |
4038 | decode_coding_c_string (&coding, (unsigned char *) read_buf, |
4039 | unprocessed, conversion_buffer); | |
db327c7e KH |
4040 | coding.mode &= ~CODING_MODE_LAST_BLOCK; |
4041 | } | |
4042 | ||
50b06221 | 4043 | coding_system = CODING_ID_NAME (coding.id); |
f6a07420 | 4044 | set_coding_system = 1; |
db327c7e | 4045 | decoded = BUF_BEG_ADDR (XBUFFER (conversion_buffer)); |
50342b35 KH |
4046 | inserted = (BUF_Z_BYTE (XBUFFER (conversion_buffer)) |
4047 | - BUF_BEG_BYTE (XBUFFER (conversion_buffer))); | |
db327c7e KH |
4048 | |
4049 | /* Compare the beginning of the converted string with the buffer | |
4050 | text. */ | |
3dbcf3f6 RS |
4051 | |
4052 | bufpos = 0; | |
4053 | while (bufpos < inserted && same_at_start < same_at_end | |
db327c7e | 4054 | && FETCH_BYTE (same_at_start) == decoded[bufpos]) |
3dbcf3f6 RS |
4055 | same_at_start++, bufpos++; |
4056 | ||
db327c7e | 4057 | /* If the file matches the head of buffer completely, |
3dbcf3f6 RS |
4058 | there's no need to replace anything. */ |
4059 | ||
4060 | if (bufpos == inserted) | |
4061 | { | |
3dbcf3f6 | 4062 | /* Truncate the buffer to the size of the file. */ |
18a9f8d9 SM |
4063 | if (same_at_start == same_at_end) |
4064 | nochange = 1; | |
4065 | else | |
4066 | del_range_byte (same_at_start, same_at_end, 0); | |
427f5aab | 4067 | inserted = 0; |
e8553dd1 KH |
4068 | |
4069 | unbind_to (this_count, Qnil); | |
3dbcf3f6 RS |
4070 | goto handled; |
4071 | } | |
4072 | ||
db327c7e KH |
4073 | /* Extend the start of non-matching text area to the previous |
4074 | multibyte character boundary. */ | |
4b4deea2 | 4075 | if (! NILP (BVAR (current_buffer, enable_multibyte_characters))) |
20f6783d RS |
4076 | while (same_at_start > BEGV_BYTE |
4077 | && ! CHAR_HEAD_P (FETCH_BYTE (same_at_start))) | |
4078 | same_at_start--; | |
4079 | ||
3dbcf3f6 RS |
4080 | /* Scan this bufferful from the end, comparing with |
4081 | the Emacs buffer. */ | |
4082 | bufpos = inserted; | |
4083 | ||
4084 | /* Compare with same_at_start to avoid counting some buffer text | |
4085 | as matching both at the file's beginning and at the end. */ | |
4086 | while (bufpos > 0 && same_at_end > same_at_start | |
db327c7e | 4087 | && FETCH_BYTE (same_at_end - 1) == decoded[bufpos - 1]) |
3dbcf3f6 RS |
4088 | same_at_end--, bufpos--; |
4089 | ||
db327c7e KH |
4090 | /* Extend the end of non-matching text area to the next |
4091 | multibyte character boundary. */ | |
4b4deea2 | 4092 | if (! NILP (BVAR (current_buffer, enable_multibyte_characters))) |
20f6783d RS |
4093 | while (same_at_end < ZV_BYTE |
4094 | && ! CHAR_HEAD_P (FETCH_BYTE (same_at_end))) | |
4095 | same_at_end++; | |
4096 | ||
3dbcf3f6 | 4097 | /* Don't try to reuse the same piece of text twice. */ |
ec7adf26 | 4098 | overlap = same_at_start - BEGV_BYTE - (same_at_end + inserted - ZV_BYTE); |
3dbcf3f6 RS |
4099 | if (overlap > 0) |
4100 | same_at_end += overlap; | |
4101 | ||
727a0b4a RS |
4102 | /* If display currently starts at beginning of line, |
4103 | keep it that way. */ | |
e74aeda8 | 4104 | if (XBUFFER (XWINDOW (selected_window)->contents) == current_buffer) |
c98ff5dd | 4105 | XWINDOW (selected_window)->start_at_line_beg = !NILP (Fbolp ()); |
727a0b4a | 4106 | |
3dbcf3f6 RS |
4107 | /* Replace the chars that we need to replace, |
4108 | and update INSERTED to equal the number of bytes | |
db327c7e | 4109 | we are taking from the decoded string. */ |
4b70e2c9 | 4110 | inserted -= (ZV_BYTE - same_at_end) + (same_at_start - BEGV_BYTE); |
427f5aab | 4111 | |
643c73b9 | 4112 | if (same_at_end != same_at_start) |
427f5aab KH |
4113 | { |
4114 | del_range_byte (same_at_start, same_at_end, 0); | |
4115 | temp = GPT; | |
22513e52 | 4116 | eassert (same_at_start == GPT_BYTE); |
427f5aab KH |
4117 | same_at_start = GPT_BYTE; |
4118 | } | |
643c73b9 RS |
4119 | else |
4120 | { | |
643c73b9 | 4121 | temp = BYTE_TO_CHAR (same_at_start); |
643c73b9 | 4122 | } |
427f5aab KH |
4123 | /* Insert from the file at the proper position. */ |
4124 | SET_PT_BOTH (temp, same_at_start); | |
50342b35 KH |
4125 | same_at_start_charpos |
4126 | = buf_bytepos_to_charpos (XBUFFER (conversion_buffer), | |
7f5d2c72 SM |
4127 | same_at_start - BEGV_BYTE |
4128 | + BUF_BEG_BYTE (XBUFFER (conversion_buffer))); | |
22513e52 | 4129 | eassert (same_at_start_charpos == temp - (BEGV - BEG)); |
50342b35 KH |
4130 | inserted_chars |
4131 | = (buf_bytepos_to_charpos (XBUFFER (conversion_buffer), | |
7f5d2c72 SM |
4132 | same_at_start + inserted - BEGV_BYTE |
4133 | + BUF_BEG_BYTE (XBUFFER (conversion_buffer))) | |
50342b35 | 4134 | - same_at_start_charpos); |
d07af40d KH |
4135 | /* This binding is to avoid ask-user-about-supersession-threat |
4136 | being called in insert_from_buffer (via in | |
4137 | prepare_to_modify_buffer). */ | |
4138 | specbind (intern ("buffer-file-name"), Qnil); | |
db327c7e | 4139 | insert_from_buffer (XBUFFER (conversion_buffer), |
50342b35 | 4140 | same_at_start_charpos, inserted_chars, 0); |
427f5aab KH |
4141 | /* Set `inserted' to the number of inserted characters. */ |
4142 | inserted = PT - temp; | |
77343e1d KH |
4143 | /* Set point before the inserted characters. */ |
4144 | SET_PT_BOTH (temp, same_at_start); | |
3dbcf3f6 | 4145 | |
db327c7e | 4146 | unbind_to (this_count, Qnil); |
3dbcf3f6 | 4147 | |
3dbcf3f6 | 4148 | goto handled; |
3d0387c0 RS |
4149 | } |
4150 | ||
d4b8687b | 4151 | if (! not_regular) |
728f8f0a | 4152 | total = end_offset - beg_offset; |
d4b8687b RS |
4153 | else |
4154 | /* For a special file, all we can do is guess. */ | |
4155 | total = READ_BUF_SIZE; | |
570d7624 | 4156 | |
8b913b57 | 4157 | if (NILP (visit) && total > 0) |
68780e2a RS |
4158 | { |
4159 | #ifdef CLASH_DETECTION | |
4b4deea2 | 4160 | if (!NILP (BVAR (current_buffer, file_truename)) |
68780e2a | 4161 | /* Make binding buffer-file-name to nil effective. */ |
4b4deea2 | 4162 | && !NILP (BVAR (current_buffer, filename)) |
68780e2a RS |
4163 | && SAVE_MODIFF >= MODIFF) |
4164 | we_locked_file = 1; | |
4165 | #endif /* CLASH_DETECTION */ | |
4166 | prepare_to_modify_buffer (GPT, GPT, NULL); | |
4167 | } | |
570d7624 | 4168 | |
13002885 | 4169 | move_gap_both (PT, PT_BYTE); |
7fded690 JB |
4170 | if (GAP_SIZE < total) |
4171 | make_gap (total - GAP_SIZE); | |
4172 | ||
728f8f0a | 4173 | if (beg_offset != 0 || !NILP (replace)) |
7fded690 | 4174 | { |
728f8f0a | 4175 | if (lseek (fd, beg_offset, SEEK_SET) < 0) |
b1d1b865 RS |
4176 | report_file_error ("Setting file position", |
4177 | Fcons (orig_filename, Qnil)); | |
7fded690 JB |
4178 | } |
4179 | ||
2ef88fd4 DA |
4180 | /* In the following loop, HOW_MUCH contains the total bytes read so |
4181 | far for a regular file, and not changed for a special file. But, | |
4182 | before exiting the loop, it is set to a negative value if I/O | |
4183 | error occurs. */ | |
a1d2b64a | 4184 | how_much = 0; |
efdc16c9 | 4185 | |
6fdaa9a0 KH |
4186 | /* Total bytes inserted. */ |
4187 | inserted = 0; | |
efdc16c9 | 4188 | |
2ef88fd4 DA |
4189 | /* Here, we don't do code conversion in the loop. It is done by |
4190 | decode_coding_gap after all data are read into the buffer. */ | |
4191 | { | |
4192 | ptrdiff_t gap_size = GAP_SIZE; | |
1b978129 | 4193 | |
2ef88fd4 DA |
4194 | while (how_much < total) |
4195 | { | |
4196 | /* try is reserved in some compilers (Microsoft C) */ | |
4197 | ptrdiff_t trytry = min (total - how_much, READ_BUF_SIZE); | |
4198 | ptrdiff_t this; | |
1b978129 | 4199 | |
2ef88fd4 DA |
4200 | if (not_regular) |
4201 | { | |
4202 | Lisp_Object nbytes; | |
4203 | ||
4204 | /* Maybe make more room. */ | |
4205 | if (gap_size < trytry) | |
4206 | { | |
4207 | make_gap (trytry - gap_size); | |
4208 | gap_size = GAP_SIZE - inserted; | |
4209 | } | |
4210 | ||
4211 | /* Read from the file, capturing `quit'. When an | |
4212 | error occurs, end the loop, and arrange for a quit | |
4213 | to be signaled after decoding the text we read. */ | |
4214 | nbytes = internal_condition_case_1 | |
4215 | (read_non_regular, | |
7b1123d8 PE |
4216 | make_save_value (SAVE_TYPE_INT_INT_INT, (ptrdiff_t) fd, |
4217 | inserted, trytry), | |
2ef88fd4 DA |
4218 | Qerror, read_non_regular_quit); |
4219 | ||
4220 | if (NILP (nbytes)) | |
4221 | { | |
4222 | read_quit = 1; | |
4223 | break; | |
4224 | } | |
4225 | ||
4226 | this = XINT (nbytes); | |
4227 | } | |
4228 | else | |
4229 | { | |
4230 | /* Allow quitting out of the actual I/O. We don't make text | |
4231 | part of the buffer until all the reading is done, so a C-g | |
4232 | here doesn't do any harm. */ | |
4233 | immediate_quit = 1; | |
4234 | QUIT; | |
4235 | this = emacs_read (fd, | |
4236 | ((char *) BEG_ADDR + PT_BYTE - BEG_BYTE | |
4237 | + inserted), | |
4238 | trytry); | |
4239 | immediate_quit = 0; | |
4240 | } | |
4241 | ||
4242 | if (this <= 0) | |
4243 | { | |
4244 | how_much = this; | |
4245 | break; | |
4246 | } | |
4247 | ||
4248 | gap_size -= this; | |
4249 | ||
4250 | /* For a regular file, where TOTAL is the real size, | |
4251 | count HOW_MUCH to compare with it. | |
4252 | For a special file, where TOTAL is just a buffer size, | |
4253 | so don't bother counting in HOW_MUCH. | |
4254 | (INSERTED is where we count the number of characters inserted.) */ | |
4255 | if (! not_regular) | |
4256 | how_much += this; | |
4257 | inserted += this; | |
4258 | } | |
4259 | } | |
1b978129 | 4260 | |
e07469fa DA |
4261 | /* Now we have either read all the file data into the gap, |
4262 | or stop reading on I/O error or quit. If nothing was | |
4263 | read, undo marking the buffer modified. */ | |
68780e2a RS |
4264 | |
4265 | if (inserted == 0) | |
4266 | { | |
6840d350 | 4267 | #ifdef CLASH_DETECTION |
68780e2a | 4268 | if (we_locked_file) |
4b4deea2 | 4269 | unlock_file (BVAR (current_buffer, file_truename)); |
6840d350 | 4270 | #endif |
68780e2a RS |
4271 | Vdeactivate_mark = old_Vdeactivate_mark; |
4272 | } | |
83c1cf6d RS |
4273 | else |
4274 | Vdeactivate_mark = Qt; | |
68780e2a | 4275 | |
68c45bf0 | 4276 | emacs_close (fd); |
6fdaa9a0 | 4277 | |
c8a6d68a KH |
4278 | /* Discard the unwind protect for closing the file. */ |
4279 | specpdl_ptr--; | |
6fdaa9a0 | 4280 | |
2ef88fd4 DA |
4281 | if (how_much < 0) |
4282 | error ("IO error reading %s: %s", | |
4283 | SDATA (orig_filename), emacs_strerror (errno)); | |
4284 | ||
4285 | /* Make the text read part of the buffer. */ | |
4286 | GAP_SIZE -= inserted; | |
4287 | GPT += inserted; | |
4288 | GPT_BYTE += inserted; | |
4289 | ZV += inserted; | |
4290 | ZV_BYTE += inserted; | |
4291 | Z += inserted; | |
4292 | Z_BYTE += inserted; | |
4293 | ||
4294 | if (GAP_SIZE > 0) | |
4295 | /* Put an anchor to ensure multi-byte form ends at gap. */ | |
4296 | *GPT_ADDR = 0; | |
4297 | ||
f8569325 DL |
4298 | notfound: |
4299 | ||
db327c7e | 4300 | if (NILP (coding_system)) |
c8a6d68a | 4301 | { |
2df42e09 | 4302 | /* The coding system is not yet decided. Decide it by an |
dfe35e7b RS |
4303 | optimized method for handling `coding:' tag. |
4304 | ||
4305 | Note that we can get here only if the buffer was empty | |
4306 | before the insertion. */ | |
f736ffbf | 4307 | |
2df42e09 | 4308 | if (!NILP (Vcoding_system_for_read)) |
db327c7e | 4309 | coding_system = Vcoding_system_for_read; |
2df42e09 KH |
4310 | else |
4311 | { | |
98a7d268 KH |
4312 | /* Since we are sure that the current buffer was empty |
4313 | before the insertion, we can toggle | |
4314 | enable-multibyte-characters directly here without taking | |
9a7f80aa KH |
4315 | care of marker adjustment. By this way, we can run Lisp |
4316 | program safely before decoding the inserted text. */ | |
98a7d268 | 4317 | Lisp_Object unwind_data; |
d311d28c | 4318 | ptrdiff_t count1 = SPECPDL_INDEX (); |
2df42e09 | 4319 | |
4b4deea2 TT |
4320 | unwind_data = Fcons (BVAR (current_buffer, enable_multibyte_characters), |
4321 | Fcons (BVAR (current_buffer, undo_list), | |
98a7d268 | 4322 | Fcurrent_buffer ())); |
39eb03f1 PE |
4323 | bset_enable_multibyte_characters (current_buffer, Qnil); |
4324 | bset_undo_list (current_buffer, Qt); | |
98a7d268 KH |
4325 | record_unwind_protect (decide_coding_unwind, unwind_data); |
4326 | ||
4327 | if (inserted > 0 && ! NILP (Vset_auto_coding_function)) | |
4328 | { | |
db327c7e | 4329 | coding_system = call2 (Vset_auto_coding_function, |
8f924df7 | 4330 | filename, make_number (inserted)); |
2df42e09 | 4331 | } |
f736ffbf | 4332 | |
db327c7e | 4333 | if (NILP (coding_system)) |
2df42e09 KH |
4334 | { |
4335 | /* If the coding system is not yet decided, check | |
4336 | file-coding-system-alist. */ | |
8f924df7 | 4337 | Lisp_Object args[6]; |
f736ffbf | 4338 | |
2df42e09 KH |
4339 | args[0] = Qinsert_file_contents, args[1] = orig_filename; |
4340 | args[2] = visit, args[3] = beg, args[4] = end, args[5] = Qnil; | |
8f924df7 KH |
4341 | coding_system = Ffind_operation_coding_system (6, args); |
4342 | if (CONSP (coding_system)) | |
4343 | coding_system = XCAR (coding_system); | |
f736ffbf | 4344 | } |
f839df0c | 4345 | unbind_to (count1, Qnil); |
98a7d268 | 4346 | inserted = Z_BYTE - BEG_BYTE; |
2df42e09 | 4347 | } |
f736ffbf | 4348 | |
db327c7e KH |
4349 | if (NILP (coding_system)) |
4350 | coding_system = Qundecided; | |
4351 | else | |
4352 | CHECK_CODING_SYSTEM (coding_system); | |
f736ffbf | 4353 | |
4b4deea2 | 4354 | if (NILP (BVAR (current_buffer, enable_multibyte_characters))) |
237a6fd2 | 4355 | /* We must suppress all character code conversion except for |
2df42e09 | 4356 | end-of-line conversion. */ |
db327c7e | 4357 | coding_system = raw_text_coding_system (coding_system); |
db327c7e KH |
4358 | setup_coding_system (coding_system, &coding); |
4359 | /* Ensure we set Vlast_coding_system_used. */ | |
4360 | set_coding_system = 1; | |
2df42e09 | 4361 | } |
f736ffbf | 4362 | |
db327c7e | 4363 | if (!NILP (visit)) |
8c3b9441 | 4364 | { |
db327c7e | 4365 | /* When we visit a file by raw-text, we change the buffer to |
9a7f80aa | 4366 | unibyte. */ |
db327c7e KH |
4367 | if (CODING_FOR_UNIBYTE (&coding) |
4368 | /* Can't do this if part of the buffer might be preserved. */ | |
4369 | && NILP (replace)) | |
4370 | /* Visiting a file with these coding system makes the buffer | |
4371 | unibyte. */ | |
39eb03f1 | 4372 | bset_enable_multibyte_characters (current_buffer, Qnil); |
8c3b9441 KH |
4373 | } |
4374 | ||
4b4deea2 | 4375 | coding.dst_multibyte = ! NILP (BVAR (current_buffer, enable_multibyte_characters)); |
5b359650 | 4376 | if (CODING_MAY_REQUIRE_DECODING (&coding) |
1c157f8d | 4377 | && (inserted > 0 || CODING_REQUIRE_FLUSHING (&coding))) |
2df42e09 | 4378 | { |
db327c7e KH |
4379 | move_gap_both (PT, PT_BYTE); |
4380 | GAP_SIZE += inserted; | |
4381 | ZV_BYTE -= inserted; | |
4382 | Z_BYTE -= inserted; | |
4383 | ZV -= inserted; | |
4384 | Z -= inserted; | |
4385 | decode_coding_gap (&coding, inserted, inserted); | |
4386 | inserted = coding.produced_char; | |
5b359650 | 4387 | coding_system = CODING_ID_NAME (coding.id); |
2df42e09 | 4388 | } |
db327c7e KH |
4389 | else if (inserted > 0) |
4390 | adjust_after_insert (PT, PT_BYTE, PT + inserted, PT_BYTE + inserted, | |
4391 | inserted); | |
570d7624 | 4392 | |
0068070e SM |
4393 | /* Call after-change hooks for the inserted text, aside from the case |
4394 | of normal visiting (not with REPLACE), which is done in a new buffer | |
4395 | "before" the buffer is changed. */ | |
4396 | if (inserted > 0 && total > 0 | |
4397 | && (NILP (visit) || !NILP (replace))) | |
4398 | { | |
4399 | signal_after_change (PT, 0, inserted); | |
4400 | update_compositions (PT, PT, CHECK_BORDER); | |
4401 | } | |
4402 | ||
cf6d2357 RS |
4403 | /* Now INSERTED is measured in characters. */ |
4404 | ||
32f4334d | 4405 | handled: |
570d7624 | 4406 | |
db65a627 CY |
4407 | if (deferred_remove_unwind_protect) |
4408 | /* If requested above, discard the unwind protect for closing the | |
4409 | file. */ | |
4410 | specpdl_ptr--; | |
4411 | ||
265a9e55 | 4412 | if (!NILP (visit)) |
570d7624 | 4413 | { |
22513e52 | 4414 | if (empty_undo_list_p) |
39eb03f1 | 4415 | bset_undo_list (current_buffer, Qnil); |
62bcf009 | 4416 | |
a7e82472 RS |
4417 | if (NILP (handler)) |
4418 | { | |
dbeed9a6 | 4419 | current_buffer->modtime = mtime; |
58b963f7 | 4420 | current_buffer->modtime_size = st.st_size; |
39eb03f1 | 4421 | bset_filename (current_buffer, orig_filename); |
a7e82472 | 4422 | } |
62bcf009 | 4423 | |
95385625 | 4424 | SAVE_MODIFF = MODIFF; |
0b5397c2 | 4425 | BUF_AUTOSAVE_MODIFF (current_buffer) = MODIFF; |
4b4deea2 | 4426 | XSETFASTINT (BVAR (current_buffer, save_length), Z - BEG); |
570d7624 | 4427 | #ifdef CLASH_DETECTION |
32f4334d RS |
4428 | if (NILP (handler)) |
4429 | { | |
4b4deea2 TT |
4430 | if (!NILP (BVAR (current_buffer, file_truename))) |
4431 | unlock_file (BVAR (current_buffer, file_truename)); | |
32f4334d RS |
4432 | unlock_file (filename); |
4433 | } | |
570d7624 | 4434 | #endif /* CLASH_DETECTION */ |
330bfe57 | 4435 | if (not_regular) |
24b1ddad KS |
4436 | xsignal2 (Qfile_error, |
4437 | build_string ("not a regular file"), orig_filename); | |
570d7624 JB |
4438 | } |
4439 | ||
b6426b03 | 4440 | if (set_coding_system) |
8f924df7 | 4441 | Vlast_coding_system_used = coding_system; |
b6426b03 | 4442 | |
2080470e | 4443 | if (! NILP (Ffboundp (Qafter_insert_file_set_coding))) |
b6426b03 | 4444 | { |
37a3c774 KH |
4445 | insval = call2 (Qafter_insert_file_set_coding, make_number (inserted), |
4446 | visit); | |
b6426b03 KH |
4447 | if (! NILP (insval)) |
4448 | { | |
d311d28c PE |
4449 | if (! RANGED_INTEGERP (0, insval, ZV - PT)) |
4450 | wrong_type_argument (intern ("inserted-chars"), insval); | |
b6426b03 KH |
4451 | inserted = XFASTINT (insval); |
4452 | } | |
4453 | } | |
4454 | ||
6420e80c | 4455 | /* Decode file format. */ |
c8a6d68a | 4456 | if (inserted > 0) |
0d420e88 | 4457 | { |
6420e80c | 4458 | /* Don't run point motion or modification hooks when decoding. */ |
d311d28c PE |
4459 | ptrdiff_t count1 = SPECPDL_INDEX (); |
4460 | ptrdiff_t old_inserted = inserted; | |
6f2528d8 MR |
4461 | specbind (Qinhibit_point_motion_hooks, Qt); |
4462 | specbind (Qinhibit_modification_hooks, Qt); | |
4463 | ||
6420e80c | 4464 | /* Save old undo list and don't record undo for decoding. */ |
4b4deea2 | 4465 | old_undo = BVAR (current_buffer, undo_list); |
39eb03f1 | 4466 | bset_undo_list (current_buffer, Qt); |
efdc16c9 | 4467 | |
6f2528d8 | 4468 | if (NILP (replace)) |
ed8e506f | 4469 | { |
6f2528d8 MR |
4470 | insval = call3 (Qformat_decode, |
4471 | Qnil, make_number (inserted), visit); | |
d311d28c PE |
4472 | if (! RANGED_INTEGERP (0, insval, ZV - PT)) |
4473 | wrong_type_argument (intern ("inserted-chars"), insval); | |
6f2528d8 MR |
4474 | inserted = XFASTINT (insval); |
4475 | } | |
4476 | else | |
4477 | { | |
4478 | /* If REPLACE is non-nil and we succeeded in not replacing the | |
6420e80c AS |
4479 | beginning or end of the buffer text with the file's contents, |
4480 | call format-decode with `point' positioned at the beginning | |
fa463103 | 4481 | of the buffer and `inserted' equaling the number of |
6420e80c AS |
4482 | characters in the buffer. Otherwise, format-decode might |
4483 | fail to correctly analyze the beginning or end of the buffer. | |
4484 | Hence we temporarily save `point' and `inserted' here and | |
4485 | restore `point' iff format-decode did not insert or delete | |
4486 | any text. Otherwise we leave `point' at point-min. */ | |
d311d28c PE |
4487 | ptrdiff_t opoint = PT; |
4488 | ptrdiff_t opoint_byte = PT_BYTE; | |
4489 | ptrdiff_t oinserted = ZV - BEGV; | |
4490 | EMACS_INT ochars_modiff = CHARS_MODIFF; | |
1f163f28 MA |
4491 | |
4492 | TEMP_SET_PT_BOTH (BEGV, BEGV_BYTE); | |
6f2528d8 MR |
4493 | insval = call3 (Qformat_decode, |
4494 | Qnil, make_number (oinserted), visit); | |
d311d28c PE |
4495 | if (! RANGED_INTEGERP (0, insval, ZV - PT)) |
4496 | wrong_type_argument (intern ("inserted-chars"), insval); | |
cac4219c MR |
4497 | if (ochars_modiff == CHARS_MODIFF) |
4498 | /* format_decode didn't modify buffer's characters => move | |
4499 | point back to position before inserted text and leave | |
6420e80c | 4500 | value of inserted alone. */ |
6f2528d8 | 4501 | SET_PT_BOTH (opoint, opoint_byte); |
cac4219c MR |
4502 | else |
4503 | /* format_decode modified buffer's characters => consider | |
6420e80c | 4504 | entire buffer changed and leave point at point-min. */ |
cac4219c | 4505 | inserted = XFASTINT (insval); |
ed8e506f | 4506 | } |
efdc16c9 | 4507 | |
6f2528d8 | 4508 | /* For consistency with format-decode call these now iff inserted > 0 |
6420e80c | 4509 | (martin 2007-06-28). */ |
6f2528d8 MR |
4510 | p = Vafter_insert_file_functions; |
4511 | while (CONSP (p)) | |
4512 | { | |
4513 | if (NILP (replace)) | |
4514 | { | |
4515 | insval = call1 (XCAR (p), make_number (inserted)); | |
4516 | if (!NILP (insval)) | |
4517 | { | |
d311d28c PE |
4518 | if (! RANGED_INTEGERP (0, insval, ZV - PT)) |
4519 | wrong_type_argument (intern ("inserted-chars"), insval); | |
6f2528d8 MR |
4520 | inserted = XFASTINT (insval); |
4521 | } | |
4522 | } | |
4523 | else | |
4524 | { | |
6420e80c AS |
4525 | /* For the rationale of this see the comment on |
4526 | format-decode above. */ | |
d311d28c PE |
4527 | ptrdiff_t opoint = PT; |
4528 | ptrdiff_t opoint_byte = PT_BYTE; | |
4529 | ptrdiff_t oinserted = ZV - BEGV; | |
4530 | EMACS_INT ochars_modiff = CHARS_MODIFF; | |
1f163f28 | 4531 | |
6f2528d8 MR |
4532 | TEMP_SET_PT_BOTH (BEGV, BEGV_BYTE); |
4533 | insval = call1 (XCAR (p), make_number (oinserted)); | |
4534 | if (!NILP (insval)) | |
4535 | { | |
d311d28c PE |
4536 | if (! RANGED_INTEGERP (0, insval, ZV - PT)) |
4537 | wrong_type_argument (intern ("inserted-chars"), insval); | |
cac4219c MR |
4538 | if (ochars_modiff == CHARS_MODIFF) |
4539 | /* after_insert_file_functions didn't modify | |
4540 | buffer's characters => move point back to | |
4541 | position before inserted text and leave value of | |
6420e80c | 4542 | inserted alone. */ |
6f2528d8 | 4543 | SET_PT_BOTH (opoint, opoint_byte); |
cac4219c MR |
4544 | else |
4545 | /* after_insert_file_functions did modify buffer's | |
4546 | characters => consider entire buffer changed and | |
6420e80c | 4547 | leave point at point-min. */ |
cac4219c | 4548 | inserted = XFASTINT (insval); |
6f2528d8 MR |
4549 | } |
4550 | } | |
4551 | ||
4552 | QUIT; | |
4553 | p = XCDR (p); | |
ed8e506f | 4554 | } |
efdc16c9 | 4555 | |
22513e52 | 4556 | if (!empty_undo_list_p) |
6f2528d8 | 4557 | { |
39eb03f1 | 4558 | bset_undo_list (current_buffer, old_undo); |
6420e80c | 4559 | if (CONSP (old_undo) && inserted != old_inserted) |
6f2528d8 | 4560 | { |
6420e80c AS |
4561 | /* Adjust the last undo record for the size change during |
4562 | the format conversion. */ | |
6f2528d8 | 4563 | Lisp_Object tem = XCAR (old_undo); |
6420e80c AS |
4564 | if (CONSP (tem) && INTEGERP (XCAR (tem)) |
4565 | && INTEGERP (XCDR (tem)) | |
4566 | && XFASTINT (XCDR (tem)) == PT + old_inserted) | |
4567 | XSETCDR (tem, make_number (PT + inserted)); | |
6f2528d8 MR |
4568 | } |
4569 | } | |
6f2528d8 | 4570 | else |
1bc99c9c | 4571 | /* If undo_list was Qt before, keep it that way. |
6420e80c | 4572 | Otherwise start with an empty undo_list. */ |
39eb03f1 | 4573 | bset_undo_list (current_buffer, EQ (old_undo, Qt) ? Qt : Qnil); |
efdc16c9 | 4574 | |
f839df0c | 4575 | unbind_to (count1, Qnil); |
0d420e88 BG |
4576 | } |
4577 | ||
f8569325 | 4578 | if (!NILP (visit) |
d35af63c | 4579 | && EMACS_NSECS (current_buffer->modtime) == NONEXISTENT_MODTIME_NSECS) |
f8569325 DL |
4580 | { |
4581 | /* If visiting nonexistent file, return nil. */ | |
e5e9d610 | 4582 | errno = save_errno; |
f8569325 | 4583 | report_file_error ("Opening input file", Fcons (orig_filename, Qnil)); |
d6a3cc15 RS |
4584 | } |
4585 | ||
1b978129 GM |
4586 | if (read_quit) |
4587 | Fsignal (Qquit, Qnil); | |
4588 | ||
2ef88fd4 | 4589 | /* Retval needs to be dealt with in all cases consistently. */ |
a1d2b64a | 4590 | if (NILP (val)) |
e07469fa | 4591 | val = list2 (orig_filename, make_number (inserted)); |
a1d2b64a RS |
4592 | |
4593 | RETURN_UNGCPRO (unbind_to (count, val)); | |
570d7624 | 4594 | } |
7fded690 | 4595 | \f |
f57e2426 | 4596 | static Lisp_Object build_annotations (Lisp_Object, Lisp_Object); |
d6a3cc15 | 4597 | |
199607e4 | 4598 | static Lisp_Object |
971de7fb | 4599 | build_annotations_unwind (Lisp_Object arg) |
6fc6f94b | 4600 | { |
67fbc0cb | 4601 | Vwrite_region_annotation_buffers = arg; |
6fc6f94b RS |
4602 | return Qnil; |
4603 | } | |
4604 | ||
7c82a4a9 SM |
4605 | /* Decide the coding-system to encode the data with. */ |
4606 | ||
9dbda100 GM |
4607 | DEFUN ("choose-write-coding-system", Fchoose_write_coding_system, |
4608 | Schoose_write_coding_system, 3, 6, 0, | |
4609 | doc: /* Choose the coding system for writing a file. | |
4610 | Arguments are as for `write-region'. | |
4611 | This function is for internal use only. It may prompt the user. */ ) | |
4612 | (Lisp_Object start, Lisp_Object end, Lisp_Object filename, | |
4613 | Lisp_Object append, Lisp_Object visit, Lisp_Object lockname) | |
7c82a4a9 SM |
4614 | { |
4615 | Lisp_Object val; | |
75421805 | 4616 | Lisp_Object eol_parent = Qnil; |
7c82a4a9 | 4617 | |
9dbda100 GM |
4618 | /* Mimic write-region behavior. */ |
4619 | if (NILP (start)) | |
4620 | { | |
4621 | XSETFASTINT (start, BEGV); | |
4622 | XSETFASTINT (end, ZV); | |
4623 | } | |
4624 | ||
6b61353c | 4625 | if (auto_saving |
4b4deea2 TT |
4626 | && NILP (Fstring_equal (BVAR (current_buffer, filename), |
4627 | BVAR (current_buffer, auto_save_file_name)))) | |
75421805 KH |
4628 | { |
4629 | val = Qutf_8_emacs; | |
4630 | eol_parent = Qunix; | |
4631 | } | |
7c82a4a9 | 4632 | else if (!NILP (Vcoding_system_for_write)) |
42b01e1e KH |
4633 | { |
4634 | val = Vcoding_system_for_write; | |
4635 | if (coding_system_require_warning | |
4636 | && !NILP (Ffboundp (Vselect_safe_coding_system_function))) | |
4637 | /* Confirm that VAL can surely encode the current region. */ | |
4638 | val = call5 (Vselect_safe_coding_system_function, | |
4639 | start, end, Fcons (Qt, Fcons (val, Qnil)), | |
4640 | Qnil, filename); | |
4641 | } | |
7c82a4a9 SM |
4642 | else |
4643 | { | |
4644 | /* If the variable `buffer-file-coding-system' is set locally, | |
4645 | it means that the file was read with some kind of code | |
4646 | conversion or the variable is explicitly set by users. We | |
4647 | had better write it out with the same coding system even if | |
4648 | `enable-multibyte-characters' is nil. | |
4649 | ||
4650 | If it is not set locally, we anyway have to convert EOL | |
4651 | format if the default value of `buffer-file-coding-system' | |
4652 | tells that it is not Unix-like (LF only) format. */ | |
f75d7a91 PE |
4653 | bool using_default_coding = 0; |
4654 | bool force_raw_text = 0; | |
7c82a4a9 | 4655 | |
4b4deea2 | 4656 | val = BVAR (current_buffer, buffer_file_coding_system); |
7c82a4a9 SM |
4657 | if (NILP (val) |
4658 | || NILP (Flocal_variable_p (Qbuffer_file_coding_system, Qnil))) | |
4659 | { | |
4660 | val = Qnil; | |
4b4deea2 | 4661 | if (NILP (BVAR (current_buffer, enable_multibyte_characters))) |
7c82a4a9 SM |
4662 | force_raw_text = 1; |
4663 | } | |
efdc16c9 | 4664 | |
7c82a4a9 SM |
4665 | if (NILP (val)) |
4666 | { | |
4667 | /* Check file-coding-system-alist. */ | |
4668 | Lisp_Object args[7], coding_systems; | |
4669 | ||
4670 | args[0] = Qwrite_region; args[1] = start; args[2] = end; | |
4671 | args[3] = filename; args[4] = append; args[5] = visit; | |
4672 | args[6] = lockname; | |
4673 | coding_systems = Ffind_operation_coding_system (7, args); | |
4674 | if (CONSP (coding_systems) && !NILP (XCDR (coding_systems))) | |
4675 | val = XCDR (coding_systems); | |
4676 | } | |
4677 | ||
c934586d | 4678 | if (NILP (val)) |
7c82a4a9 SM |
4679 | { |
4680 | /* If we still have not decided a coding system, use the | |
4681 | default value of buffer-file-coding-system. */ | |
4b4deea2 | 4682 | val = BVAR (current_buffer, buffer_file_coding_system); |
7c82a4a9 SM |
4683 | using_default_coding = 1; |
4684 | } | |
efdc16c9 | 4685 | |
db327c7e KH |
4686 | if (! NILP (val) && ! force_raw_text) |
4687 | { | |
4688 | Lisp_Object spec, attrs; | |
4689 | ||
4690 | CHECK_CODING_SYSTEM_GET_SPEC (val, spec); | |
4691 | attrs = AREF (spec, 0); | |
4692 | if (EQ (CODING_ATTR_TYPE (attrs), Qraw_text)) | |
4693 | force_raw_text = 1; | |
4694 | } | |
4695 | ||
7c82a4a9 SM |
4696 | if (!force_raw_text |
4697 | && !NILP (Ffboundp (Vselect_safe_coding_system_function))) | |
4698 | /* Confirm that VAL can surely encode the current region. */ | |
905a4276 PJ |
4699 | val = call5 (Vselect_safe_coding_system_function, |
4700 | start, end, val, Qnil, filename); | |
7c82a4a9 | 4701 | |
db327c7e KH |
4702 | /* If the decided coding-system doesn't specify end-of-line |
4703 | format, we use that of | |
4704 | `default-buffer-file-coding-system'. */ | |
c934586d | 4705 | if (! using_default_coding |
4b4deea2 | 4706 | && ! NILP (BVAR (&buffer_defaults, buffer_file_coding_system))) |
db327c7e | 4707 | val = (coding_inherit_eol_type |
4b4deea2 | 4708 | (val, BVAR (&buffer_defaults, buffer_file_coding_system))); |
7c82a4a9 | 4709 | |
db327c7e KH |
4710 | /* If we decide not to encode text, use `raw-text' or one of its |
4711 | subsidiaries. */ | |
7c82a4a9 | 4712 | if (force_raw_text) |
db327c7e | 4713 | val = raw_text_coding_system (val); |
7c82a4a9 SM |
4714 | } |
4715 | ||
75421805 | 4716 | val = coding_inherit_eol_type (val, eol_parent); |
c934586d | 4717 | return val; |
7c82a4a9 SM |
4718 | } |
4719 | ||
a7ca3326 | 4720 | DEFUN ("write-region", Fwrite_region, Swrite_region, 3, 7, |
8c1a1077 PJ |
4721 | "r\nFWrite region to file: \ni\ni\ni\np", |
4722 | doc: /* Write current region into specified file. | |
c2efea25 RS |
4723 | When called from a program, requires three arguments: |
4724 | START, END and FILENAME. START and END are normally buffer positions | |
4725 | specifying the part of the buffer to write. | |
4726 | If START is nil, that means to use the entire buffer contents. | |
4727 | If START is a string, then output that string to the file | |
4728 | instead of any buffer contents; END is ignored. | |
4729 | ||
8c1a1077 | 4730 | Optional fourth argument APPEND if non-nil means |
b3fbb395 | 4731 | append to existing file contents (if any). If it is a number, |
8c1a1077 | 4732 | seek to that offset in the file before writing. |
36e50520 | 4733 | Optional fifth argument VISIT, if t or a string, means |
8c1a1077 PJ |
4734 | set the last-save-file-modtime of buffer to this file's modtime |
4735 | and mark buffer not modified. | |
4736 | If VISIT is a string, it is a second file name; | |
4737 | the output goes to FILENAME, but the buffer is marked as visiting VISIT. | |
4738 | VISIT is also the file name to lock and unlock for clash detection. | |
4739 | If VISIT is neither t nor nil nor a string, | |
5f4e6aa9 | 4740 | that means do not display the \"Wrote file\" message. |
8c1a1077 PJ |
4741 | The optional sixth arg LOCKNAME, if non-nil, specifies the name to |
4742 | use for locking and unlocking, overriding FILENAME and VISIT. | |
4743 | The optional seventh arg MUSTBENEW, if non-nil, insists on a check | |
4744 | for an existing file with the same name. If MUSTBENEW is `excl', | |
4745 | that means to get an error if the file already exists; never overwrite. | |
4746 | If MUSTBENEW is neither nil nor `excl', that means ask for | |
4747 | confirmation before overwriting, but do go ahead and overwrite the file | |
4748 | if the user confirms. | |
8c1a1077 PJ |
4749 | |
4750 | This does code conversion according to the value of | |
4751 | `coding-system-for-write', `buffer-file-coding-system', or | |
4752 | `file-coding-system-alist', and sets the variable | |
aacd8ba1 GM |
4753 | `last-coding-system-used' to the coding system actually used. |
4754 | ||
4755 | This calls `write-region-annotate-functions' at the start, and | |
4756 | `write-region-post-annotation-function' at the end. */) | |
5842a27b | 4757 | (Lisp_Object start, Lisp_Object end, Lisp_Object filename, Lisp_Object append, Lisp_Object visit, Lisp_Object lockname, Lisp_Object mustbenew) |
570d7624 | 4758 | { |
f75d7a91 | 4759 | int desc; |
3a955a1f PE |
4760 | int open_flags; |
4761 | int mode; | |
4762 | off_t offset IF_LINT (= 0); | |
f75d7a91 | 4763 | bool ok; |
6bbd7a29 | 4764 | int save_errno = 0; |
5976c3fe | 4765 | const char *fn; |
570d7624 | 4766 | struct stat st; |
d6453ce4 | 4767 | EMACS_TIME modtime; |
d311d28c | 4768 | ptrdiff_t count = SPECPDL_INDEX (); |
6fc6f94b | 4769 | int count1; |
3eac9910 | 4770 | Lisp_Object handler; |
4ad827c5 | 4771 | Lisp_Object visit_file; |
65b7d3e7 | 4772 | Lisp_Object annotations; |
b1d1b865 | 4773 | Lisp_Object encoded_filename; |
f75d7a91 PE |
4774 | bool visiting = (EQ (visit, Qt) || STRINGP (visit)); |
4775 | bool quietly = !NILP (visit); | |
7204a979 | 4776 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4, gcpro5; |
6fc6f94b | 4777 | struct buffer *given_buffer; |
6fdaa9a0 | 4778 | struct coding_system coding; |
570d7624 | 4779 | |
d3a67486 | 4780 | if (current_buffer->base_buffer && visiting) |
95385625 RS |
4781 | error ("Cannot do file visiting in an indirect buffer"); |
4782 | ||
561cb8e1 | 4783 | if (!NILP (start) && !STRINGP (start)) |
570d7624 JB |
4784 | validate_region (&start, &end); |
4785 | ||
95c1c901 | 4786 | visit_file = Qnil; |
59fac292 | 4787 | GCPRO5 (start, filename, visit, visit_file, lockname); |
b56567b5 | 4788 | |
570d7624 | 4789 | filename = Fexpand_file_name (filename, Qnil); |
de1d0127 | 4790 | |
236a12f2 | 4791 | if (!NILP (mustbenew) && !EQ (mustbenew, Qexcl)) |
b8b29dc9 | 4792 | barf_or_query_if_file_exists (filename, "overwrite", 1, 0, 1); |
de1d0127 | 4793 | |
561cb8e1 | 4794 | if (STRINGP (visit)) |
e5176bae | 4795 | visit_file = Fexpand_file_name (visit, Qnil); |
4ad827c5 RS |
4796 | else |
4797 | visit_file = filename; | |
4798 | ||
7204a979 RS |
4799 | if (NILP (lockname)) |
4800 | lockname = visit_file; | |
4801 | ||
65b7d3e7 RS |
4802 | annotations = Qnil; |
4803 | ||
32f4334d RS |
4804 | /* If the file name has special constructs in it, |
4805 | call the corresponding file handler. */ | |
49307295 | 4806 | handler = Ffind_file_name_handler (filename, Qwrite_region); |
b56ad927 | 4807 | /* If FILENAME has no handler, see if VISIT has one. */ |
93c30b5f | 4808 | if (NILP (handler) && STRINGP (visit)) |
199607e4 | 4809 | handler = Ffind_file_name_handler (visit, Qwrite_region); |
3eac9910 | 4810 | |
32f4334d RS |
4811 | if (!NILP (handler)) |
4812 | { | |
32f4334d | 4813 | Lisp_Object val; |
51cf6d37 RS |
4814 | val = call6 (handler, Qwrite_region, start, end, |
4815 | filename, append, visit); | |
32f4334d | 4816 | |
d6a3cc15 | 4817 | if (visiting) |
32f4334d | 4818 | { |
95385625 | 4819 | SAVE_MODIFF = MODIFF; |
4b4deea2 | 4820 | XSETFASTINT (BVAR (current_buffer, save_length), Z - BEG); |
39eb03f1 | 4821 | bset_filename (current_buffer, visit_file); |
32f4334d | 4822 | } |
09121adc | 4823 | UNGCPRO; |
32f4334d RS |
4824 | return val; |
4825 | } | |
4826 | ||
4a38de71 KH |
4827 | record_unwind_protect (save_restriction_restore, save_restriction_save ()); |
4828 | ||
561cb8e1 RS |
4829 | /* Special kludge to simplify auto-saving. */ |
4830 | if (NILP (start)) | |
4831 | { | |
6b3d752c SM |
4832 | /* Do it later, so write-region-annotate-function can work differently |
4833 | if we save "the buffer" vs "a region". | |
4834 | This is useful in tar-mode. --Stef | |
2acfd7ae | 4835 | XSETFASTINT (start, BEG); |
6b3d752c | 4836 | XSETFASTINT (end, Z); */ |
4a38de71 | 4837 | Fwiden (); |
561cb8e1 RS |
4838 | } |
4839 | ||
67fbc0cb CY |
4840 | record_unwind_protect (build_annotations_unwind, |
4841 | Vwrite_region_annotation_buffers); | |
4842 | Vwrite_region_annotation_buffers = Fcons (Fcurrent_buffer (), Qnil); | |
aed13378 | 4843 | count1 = SPECPDL_INDEX (); |
6fc6f94b RS |
4844 | |
4845 | given_buffer = current_buffer; | |
bf3428a1 RS |
4846 | |
4847 | if (!STRINGP (start)) | |
236a12f2 | 4848 | { |
bf3428a1 RS |
4849 | annotations = build_annotations (start, end); |
4850 | ||
4851 | if (current_buffer != given_buffer) | |
4852 | { | |
4853 | XSETFASTINT (start, BEGV); | |
4854 | XSETFASTINT (end, ZV); | |
4855 | } | |
236a12f2 SM |
4856 | } |
4857 | ||
6b3d752c SM |
4858 | if (NILP (start)) |
4859 | { | |
4860 | XSETFASTINT (start, BEGV); | |
4861 | XSETFASTINT (end, ZV); | |
4862 | } | |
4863 | ||
236a12f2 SM |
4864 | UNGCPRO; |
4865 | ||
4866 | GCPRO5 (start, filename, annotations, visit_file, lockname); | |
4867 | ||
59fac292 SM |
4868 | /* Decide the coding-system to encode the data with. |
4869 | We used to make this choice before calling build_annotations, but that | |
4870 | leads to problems when a write-annotate-function takes care of | |
4871 | unsavable chars (as was the case with X-Symbol). */ | |
538f3845 | 4872 | Vlast_coding_system_used = |
9dbda100 | 4873 | Fchoose_write_coding_system (start, end, filename, |
538f3845 | 4874 | append, visit, lockname); |
9dbda100 GM |
4875 | |
4876 | setup_coding_system (Vlast_coding_system_used, &coding); | |
4877 | ||
4878 | if (!STRINGP (start) && !NILP (BVAR (current_buffer, selective_display))) | |
4879 | coding.mode |= CODING_MODE_SELECTIVE_DISPLAY; | |
d6a3cc15 | 4880 | |
570d7624 JB |
4881 | #ifdef CLASH_DETECTION |
4882 | if (!auto_saving) | |
67fbc0cb | 4883 | lock_file (lockname); |
570d7624 JB |
4884 | #endif /* CLASH_DETECTION */ |
4885 | ||
b1d1b865 | 4886 | encoded_filename = ENCODE_FILE (filename); |
5976c3fe | 4887 | fn = SSDATA (encoded_filename); |
3a955a1f PE |
4888 | open_flags = O_WRONLY | O_BINARY | O_CREAT; |
4889 | open_flags |= EQ (mustbenew, Qexcl) ? O_EXCL : !NILP (append) ? 0 : O_TRUNC; | |
4890 | if (NUMBERP (append)) | |
4891 | offset = file_offset (append); | |
4892 | else if (!NILP (append)) | |
4893 | open_flags |= O_APPEND; | |
5e570b75 | 4894 | #ifdef DOS_NT |
3a955a1f PE |
4895 | mode = S_IREAD | S_IWRITE; |
4896 | #else | |
4897 | mode = auto_saving ? auto_save_mode_bits : 0666; | |
4898 | #endif | |
4899 | ||
4900 | desc = emacs_open (fn, open_flags, mode); | |
570d7624 JB |
4901 | |
4902 | if (desc < 0) | |
4903 | { | |
4904 | #ifdef CLASH_DETECTION | |
4905 | save_errno = errno; | |
7204a979 | 4906 | if (!auto_saving) unlock_file (lockname); |
570d7624 JB |
4907 | errno = save_errno; |
4908 | #endif /* CLASH_DETECTION */ | |
43fb7d9a | 4909 | UNGCPRO; |
570d7624 JB |
4910 | report_file_error ("Opening output file", Fcons (filename, Qnil)); |
4911 | } | |
4912 | ||
4913 | record_unwind_protect (close_file_unwind, make_number (desc)); | |
4914 | ||
3a955a1f | 4915 | if (NUMBERP (append)) |
43fb7d9a | 4916 | { |
3a955a1f | 4917 | off_t ret = lseek (desc, offset, SEEK_SET); |
43fb7d9a DL |
4918 | if (ret < 0) |
4919 | { | |
570d7624 | 4920 | #ifdef CLASH_DETECTION |
e5e9d610 | 4921 | save_errno = errno; |
43fb7d9a | 4922 | if (!auto_saving) unlock_file (lockname); |
e5e9d610 | 4923 | errno = save_errno; |
570d7624 | 4924 | #endif /* CLASH_DETECTION */ |
43fb7d9a DL |
4925 | UNGCPRO; |
4926 | report_file_error ("Lseek error", Fcons (filename, Qnil)); | |
4927 | } | |
4928 | } | |
efdc16c9 | 4929 | |
43fb7d9a | 4930 | UNGCPRO; |
570d7624 | 4931 | |
570d7624 JB |
4932 | immediate_quit = 1; |
4933 | ||
561cb8e1 | 4934 | if (STRINGP (start)) |
f75d7a91 | 4935 | ok = a_write (desc, start, 0, SCHARS (start), &annotations, &coding); |
570d7624 | 4936 | else if (XINT (start) != XINT (end)) |
f75d7a91 PE |
4937 | ok = a_write (desc, Qnil, XINT (start), XINT (end) - XINT (start), |
4938 | &annotations, &coding); | |
69f6e679 RS |
4939 | else |
4940 | { | |
f75d7a91 | 4941 | /* If file was empty, still need to write the annotations. */ |
c8a6d68a | 4942 | coding.mode |= CODING_MODE_LAST_BLOCK; |
f75d7a91 | 4943 | ok = a_write (desc, Qnil, XINT (end), 0, &annotations, &coding); |
6fdaa9a0 | 4944 | } |
f75d7a91 | 4945 | save_errno = errno; |
6fdaa9a0 | 4946 | |
f75d7a91 PE |
4947 | if (ok && CODING_REQUIRE_FLUSHING (&coding) |
4948 | && !(coding.mode & CODING_MODE_LAST_BLOCK)) | |
6fdaa9a0 KH |
4949 | { |
4950 | /* We have to flush out a data. */ | |
c8a6d68a | 4951 | coding.mode |= CODING_MODE_LAST_BLOCK; |
f75d7a91 | 4952 | ok = e_write (desc, Qnil, 1, 1, &coding); |
69f6e679 | 4953 | save_errno = errno; |
570d7624 JB |
4954 | } |
4955 | ||
4956 | immediate_quit = 0; | |
4957 | ||
cbee2131 PE |
4958 | /* fsync is not crucial for auto-save files, since they might lose |
4959 | some work anyway. */ | |
47d7532e | 4960 | if (!auto_saving && !write_region_inhibit_fsync) |
cb33c142 | 4961 | { |
cbee2131 PE |
4962 | /* Transfer data and metadata to disk, retrying if interrupted. |
4963 | fsync can report a write failure here, e.g., due to disk full | |
4964 | under NFS. But ignore EINVAL, which means fsync is not | |
4965 | supported on this file. */ | |
47d7532e PE |
4966 | while (fsync (desc) != 0) |
4967 | if (errno != EINTR) | |
4968 | { | |
4969 | if (errno != EINVAL) | |
4970 | ok = 0, save_errno = errno; | |
4971 | break; | |
4972 | } | |
cb33c142 | 4973 | } |
570d7624 | 4974 | |
d6453ce4 PE |
4975 | modtime = invalid_emacs_time (); |
4976 | if (visiting) | |
4977 | { | |
4978 | if (fstat (desc, &st) == 0) | |
4979 | modtime = get_stat_mtime (&st); | |
4980 | else | |
4981 | ok = 0, save_errno = errno; | |
4982 | } | |
4983 | ||
570d7624 | 4984 | /* NFS can report a write failure now. */ |
68c45bf0 | 4985 | if (emacs_close (desc) < 0) |
f75d7a91 | 4986 | ok = 0, save_errno = errno; |
570d7624 | 4987 | |
6fc6f94b RS |
4988 | /* Discard the unwind protect for close_file_unwind. */ |
4989 | specpdl_ptr = specpdl + count1; | |
67fbc0cb | 4990 | |
9fe43ff6 PE |
4991 | /* Some file systems have a bug where st_mtime is not updated |
4992 | properly after a write. For example, CIFS might not see the | |
4993 | st_mtime change until after the file is opened again. | |
4994 | ||
4995 | Attempt to detect this file system bug, and update MODTIME to the | |
4996 | newer st_mtime if the bug appears to be present. This introduces | |
4997 | a race condition, so to avoid most instances of the race condition | |
4998 | on non-buggy file systems, skip this check if the most recently | |
4999 | encountered non-buggy file system was the current file system. | |
5000 | ||
5001 | A race condition can occur if some other process modifies the | |
5002 | file between the fstat above and the fstat below, but the race is | |
5003 | unlikely and a similar race between the last write and the fstat | |
5004 | above cannot possibly be closed anyway. */ | |
5005 | ||
5006 | if (EMACS_TIME_VALID_P (modtime) | |
5007 | && ! (valid_timestamp_file_system && st.st_dev == timestamp_file_system)) | |
5008 | { | |
21cd50b8 | 5009 | int desc1 = emacs_open (fn, O_WRONLY | O_BINARY, 0); |
908589fd | 5010 | if (desc1 >= 0) |
9fe43ff6 PE |
5011 | { |
5012 | struct stat st1; | |
5013 | if (fstat (desc1, &st1) == 0 | |
5014 | && st.st_dev == st1.st_dev && st.st_ino == st1.st_ino) | |
5015 | { | |
8ea41ea9 PE |
5016 | /* Use the heuristic if it appears to be valid. With neither |
5017 | O_EXCL nor O_TRUNC, if Emacs happened to write nothing to the | |
5018 | file, the time stamp won't change. Also, some non-POSIX | |
5019 | systems don't update an empty file's time stamp when | |
5020 | truncating it. Finally, file systems with 100 ns or worse | |
5021 | resolution sometimes seem to have bugs: on a system with ns | |
5022 | resolution, checking ns % 100 incorrectly avoids the heuristic | |
5023 | 1% of the time, but the problem should be temporary as we will | |
5024 | try again on the next time stamp. */ | |
5025 | bool use_heuristic | |
5026 | = ((open_flags & (O_EXCL | O_TRUNC)) != 0 | |
5027 | && st.st_size != 0 | |
5028 | && EMACS_NSECS (modtime) % 100 != 0); | |
5029 | ||
9fe43ff6 | 5030 | EMACS_TIME modtime1 = get_stat_mtime (&st1); |
8ea41ea9 | 5031 | if (use_heuristic |
35e85499 | 5032 | && EMACS_TIME_EQ (modtime, modtime1) |
9fe43ff6 PE |
5033 | && st.st_size == st1.st_size) |
5034 | { | |
5035 | timestamp_file_system = st.st_dev; | |
5036 | valid_timestamp_file_system = 1; | |
5037 | } | |
5038 | else | |
5039 | { | |
5040 | st.st_size = st1.st_size; | |
5041 | modtime = modtime1; | |
5042 | } | |
5043 | } | |
5044 | emacs_close (desc1); | |
5045 | } | |
5046 | } | |
5047 | ||
67fbc0cb | 5048 | /* Call write-region-post-annotation-function. */ |
294fa707 | 5049 | while (CONSP (Vwrite_region_annotation_buffers)) |
67fbc0cb CY |
5050 | { |
5051 | Lisp_Object buf = XCAR (Vwrite_region_annotation_buffers); | |
5052 | if (!NILP (Fbuffer_live_p (buf))) | |
5053 | { | |
5054 | Fset_buffer (buf); | |
5055 | if (FUNCTIONP (Vwrite_region_post_annotation_function)) | |
5056 | call0 (Vwrite_region_post_annotation_function); | |
5057 | } | |
5058 | Vwrite_region_annotation_buffers | |
5059 | = XCDR (Vwrite_region_annotation_buffers); | |
5060 | } | |
5061 | ||
5062 | unbind_to (count, Qnil); | |
570d7624 JB |
5063 | |
5064 | #ifdef CLASH_DETECTION | |
5065 | if (!auto_saving) | |
7204a979 | 5066 | unlock_file (lockname); |
570d7624 JB |
5067 | #endif /* CLASH_DETECTION */ |
5068 | ||
5069 | /* Do this before reporting IO error | |
5070 | to avoid a "file has changed on disk" warning on | |
5071 | next attempt to save. */ | |
d6453ce4 | 5072 | if (EMACS_TIME_VALID_P (modtime)) |
58b963f7 | 5073 | { |
d6453ce4 | 5074 | current_buffer->modtime = modtime; |
58b963f7 SM |
5075 | current_buffer->modtime_size = st.st_size; |
5076 | } | |
570d7624 | 5077 | |
f75d7a91 | 5078 | if (! ok) |
d5db4077 | 5079 | error ("IO error writing %s: %s", SDATA (filename), |
68c45bf0 | 5080 | emacs_strerror (save_errno)); |
570d7624 | 5081 | |
d6a3cc15 | 5082 | if (visiting) |
570d7624 | 5083 | { |
95385625 | 5084 | SAVE_MODIFF = MODIFF; |
4b4deea2 | 5085 | XSETFASTINT (BVAR (current_buffer, save_length), Z - BEG); |
39eb03f1 | 5086 | bset_filename (current_buffer, visit_file); |
f4226e89 | 5087 | update_mode_lines++; |
570d7624 | 5088 | } |
d6a3cc15 | 5089 | else if (quietly) |
6b61353c KH |
5090 | { |
5091 | if (auto_saving | |
4b4deea2 TT |
5092 | && ! NILP (Fstring_equal (BVAR (current_buffer, filename), |
5093 | BVAR (current_buffer, auto_save_file_name)))) | |
6b61353c KH |
5094 | SAVE_MODIFF = MODIFF; |
5095 | ||
5096 | return Qnil; | |
5097 | } | |
570d7624 JB |
5098 | |
5099 | if (!auto_saving) | |
3908c576 | 5100 | message_with_string ((NUMBERP (append) |
0c328a0e RS |
5101 | ? "Updated %s" |
5102 | : ! NILP (append) | |
5103 | ? "Added to %s" | |
5104 | : "Wrote %s"), | |
5105 | visit_file, 1); | |
570d7624 JB |
5106 | |
5107 | return Qnil; | |
5108 | } | |
ec7adf26 | 5109 | \f |
dd4c5104 | 5110 | Lisp_Object merge (Lisp_Object, Lisp_Object, Lisp_Object); |
d6a3cc15 RS |
5111 | |
5112 | DEFUN ("car-less-than-car", Fcar_less_than_car, Scar_less_than_car, 2, 2, 0, | |
8c1a1077 | 5113 | doc: /* Return t if (car A) is numerically less than (car B). */) |
5842a27b | 5114 | (Lisp_Object a, Lisp_Object b) |
d6a3cc15 RS |
5115 | { |
5116 | return Flss (Fcar (a), Fcar (b)); | |
5117 | } | |
5118 | ||
5119 | /* Build the complete list of annotations appropriate for writing out | |
5120 | the text between START and END, by calling all the functions in | |
6fc6f94b RS |
5121 | write-region-annotate-functions and merging the lists they return. |
5122 | If one of these functions switches to a different buffer, we assume | |
5123 | that buffer contains altered text. Therefore, the caller must | |
5124 | make sure to restore the current buffer in all cases, | |
5125 | as save-excursion would do. */ | |
d6a3cc15 RS |
5126 | |
5127 | static Lisp_Object | |
971de7fb | 5128 | build_annotations (Lisp_Object start, Lisp_Object end) |
d6a3cc15 RS |
5129 | { |
5130 | Lisp_Object annotations; | |
5131 | Lisp_Object p, res; | |
5132 | struct gcpro gcpro1, gcpro2; | |
0a20b684 | 5133 | Lisp_Object original_buffer; |
f75d7a91 PE |
5134 | int i; |
5135 | bool used_global = 0; | |
0a20b684 RS |
5136 | |
5137 | XSETBUFFER (original_buffer, current_buffer); | |
d6a3cc15 RS |
5138 | |
5139 | annotations = Qnil; | |
5140 | p = Vwrite_region_annotate_functions; | |
5141 | GCPRO2 (annotations, p); | |
28c3eb5a | 5142 | while (CONSP (p)) |
d6a3cc15 | 5143 | { |
6fc6f94b | 5144 | struct buffer *given_buffer = current_buffer; |
bd235610 SM |
5145 | if (EQ (Qt, XCAR (p)) && !used_global) |
5146 | { /* Use the global value of the hook. */ | |
5147 | Lisp_Object arg[2]; | |
5148 | used_global = 1; | |
5149 | arg[0] = Fdefault_value (Qwrite_region_annotate_functions); | |
5150 | arg[1] = XCDR (p); | |
5151 | p = Fappend (2, arg); | |
5152 | continue; | |
5153 | } | |
6fc6f94b | 5154 | Vwrite_region_annotations_so_far = annotations; |
28c3eb5a | 5155 | res = call2 (XCAR (p), start, end); |
6fc6f94b RS |
5156 | /* If the function makes a different buffer current, |
5157 | assume that means this buffer contains altered text to be output. | |
5158 | Reset START and END from the buffer bounds | |
5159 | and discard all previous annotations because they should have | |
5160 | been dealt with by this function. */ | |
5161 | if (current_buffer != given_buffer) | |
5162 | { | |
67fbc0cb CY |
5163 | Vwrite_region_annotation_buffers |
5164 | = Fcons (Fcurrent_buffer (), | |
5165 | Vwrite_region_annotation_buffers); | |
3cf29f61 RS |
5166 | XSETFASTINT (start, BEGV); |
5167 | XSETFASTINT (end, ZV); | |
6fc6f94b RS |
5168 | annotations = Qnil; |
5169 | } | |
d6a3cc15 RS |
5170 | Flength (res); /* Check basic validity of return value */ |
5171 | annotations = merge (annotations, res, Qcar_less_than_car); | |
28c3eb5a | 5172 | p = XCDR (p); |
d6a3cc15 | 5173 | } |
0d420e88 BG |
5174 | |
5175 | /* Now do the same for annotation functions implied by the file-format */ | |
4b4deea2 TT |
5176 | if (auto_saving && (!EQ (BVAR (current_buffer, auto_save_file_format), Qt))) |
5177 | p = BVAR (current_buffer, auto_save_file_format); | |
0d420e88 | 5178 | else |
4b4deea2 | 5179 | p = BVAR (current_buffer, file_format); |
28c3eb5a | 5180 | for (i = 0; CONSP (p); p = XCDR (p), ++i) |
0d420e88 BG |
5181 | { |
5182 | struct buffer *given_buffer = current_buffer; | |
efdc16c9 | 5183 | |
0d420e88 | 5184 | Vwrite_region_annotations_so_far = annotations; |
532ed661 GM |
5185 | |
5186 | /* Value is either a list of annotations or nil if the function | |
5187 | has written annotations to a temporary buffer, which is now | |
5188 | current. */ | |
28c3eb5a | 5189 | res = call5 (Qformat_annotate_function, XCAR (p), start, end, |
532ed661 | 5190 | original_buffer, make_number (i)); |
0d420e88 BG |
5191 | if (current_buffer != given_buffer) |
5192 | { | |
3cf29f61 RS |
5193 | XSETFASTINT (start, BEGV); |
5194 | XSETFASTINT (end, ZV); | |
0d420e88 BG |
5195 | annotations = Qnil; |
5196 | } | |
efdc16c9 | 5197 | |
532ed661 GM |
5198 | if (CONSP (res)) |
5199 | annotations = merge (annotations, res, Qcar_less_than_car); | |
0d420e88 | 5200 | } |
6fdaa9a0 | 5201 | |
236a12f2 SM |
5202 | UNGCPRO; |
5203 | return annotations; | |
5204 | } | |
5205 | ||
ec7adf26 | 5206 | \f |
ce51c54c KH |
5207 | /* Write to descriptor DESC the NCHARS chars starting at POS of STRING. |
5208 | If STRING is nil, POS is the character position in the current buffer. | |
d6a3cc15 | 5209 | Intersperse with them the annotations from *ANNOT |
ce51c54c | 5210 | which fall within the range of POS to POS + NCHARS, |
d6a3cc15 RS |
5211 | each at its appropriate position. |
5212 | ||
ec7adf26 RS |
5213 | We modify *ANNOT by discarding elements as we use them up. |
5214 | ||
f75d7a91 | 5215 | Return true if successful. */ |
d6a3cc15 | 5216 | |
f75d7a91 | 5217 | static bool |
d311d28c | 5218 | a_write (int desc, Lisp_Object string, ptrdiff_t pos, |
f75d7a91 | 5219 | ptrdiff_t nchars, Lisp_Object *annot, |
8a2cbd72 | 5220 | struct coding_system *coding) |
d6a3cc15 RS |
5221 | { |
5222 | Lisp_Object tem; | |
d311d28c PE |
5223 | ptrdiff_t nextpos; |
5224 | ptrdiff_t lastpos = pos + nchars; | |
d6a3cc15 | 5225 | |
eb15aa18 | 5226 | while (NILP (*annot) || CONSP (*annot)) |
d6a3cc15 RS |
5227 | { |
5228 | tem = Fcar_safe (Fcar (*annot)); | |
ce51c54c | 5229 | nextpos = pos - 1; |
ec7adf26 | 5230 | if (INTEGERP (tem)) |
ce51c54c | 5231 | nextpos = XFASTINT (tem); |
ec7adf26 RS |
5232 | |
5233 | /* If there are no more annotations in this range, | |
5234 | output the rest of the range all at once. */ | |
ce51c54c KH |
5235 | if (! (nextpos >= pos && nextpos <= lastpos)) |
5236 | return e_write (desc, string, pos, lastpos, coding); | |
ec7adf26 RS |
5237 | |
5238 | /* Output buffer text up to the next annotation's position. */ | |
ce51c54c | 5239 | if (nextpos > pos) |
d6a3cc15 | 5240 | { |
f75d7a91 PE |
5241 | if (!e_write (desc, string, pos, nextpos, coding)) |
5242 | return 0; | |
ce51c54c | 5243 | pos = nextpos; |
d6a3cc15 | 5244 | } |
ec7adf26 | 5245 | /* Output the annotation. */ |
d6a3cc15 RS |
5246 | tem = Fcdr (Fcar (*annot)); |
5247 | if (STRINGP (tem)) | |
5248 | { | |
f75d7a91 PE |
5249 | if (!e_write (desc, tem, 0, SCHARS (tem), coding)) |
5250 | return 0; | |
d6a3cc15 RS |
5251 | } |
5252 | *annot = Fcdr (*annot); | |
5253 | } | |
f75d7a91 | 5254 | return 1; |
d6a3cc15 RS |
5255 | } |
5256 | ||
6fdaa9a0 | 5257 | |
ce51c54c KH |
5258 | /* Write text in the range START and END into descriptor DESC, |
5259 | encoding them with coding system CODING. If STRING is nil, START | |
5260 | and END are character positions of the current buffer, else they | |
f75d7a91 | 5261 | are indexes to the string STRING. Return true if successful. */ |
ec7adf26 | 5262 | |
f75d7a91 | 5263 | static bool |
d311d28c | 5264 | e_write (int desc, Lisp_Object string, ptrdiff_t start, ptrdiff_t end, |
8a2cbd72 | 5265 | struct coding_system *coding) |
570d7624 | 5266 | { |
ce51c54c KH |
5267 | if (STRINGP (string)) |
5268 | { | |
db327c7e | 5269 | start = 0; |
8f924df7 | 5270 | end = SCHARS (string); |
ce51c54c | 5271 | } |
570d7624 | 5272 | |
6fdaa9a0 KH |
5273 | /* We used to have a code for handling selective display here. But, |
5274 | now it is handled within encode_coding. */ | |
01ca97a2 KH |
5275 | |
5276 | while (start < end) | |
570d7624 | 5277 | { |
01ca97a2 | 5278 | if (STRINGP (string)) |
6ad568dd | 5279 | { |
01ca97a2 KH |
5280 | coding->src_multibyte = SCHARS (string) < SBYTES (string); |
5281 | if (CODING_REQUIRE_ENCODING (coding)) | |
5282 | { | |
5283 | encode_coding_object (coding, string, | |
5284 | start, string_char_to_byte (string, start), | |
5285 | end, string_char_to_byte (string, end), Qt); | |
5286 | } | |
5287 | else | |
5288 | { | |
5289 | coding->dst_object = string; | |
5290 | coding->consumed_char = SCHARS (string); | |
5291 | coding->produced = SBYTES (string); | |
5292 | } | |
6ad568dd | 5293 | } |
db327c7e | 5294 | else |
6ad568dd | 5295 | { |
d311d28c PE |
5296 | ptrdiff_t start_byte = CHAR_TO_BYTE (start); |
5297 | ptrdiff_t end_byte = CHAR_TO_BYTE (end); | |
b4132433 | 5298 | |
01ca97a2 KH |
5299 | coding->src_multibyte = (end - start) < (end_byte - start_byte); |
5300 | if (CODING_REQUIRE_ENCODING (coding)) | |
5301 | { | |
5302 | encode_coding_object (coding, Fcurrent_buffer (), | |
5303 | start, start_byte, end, end_byte, Qt); | |
5304 | } | |
5305 | else | |
5306 | { | |
5307 | coding->dst_object = Qnil; | |
5308 | coding->dst_pos_byte = start_byte; | |
5309 | if (start >= GPT || end <= GPT) | |
5310 | { | |
5311 | coding->consumed_char = end - start; | |
5312 | coding->produced = end_byte - start_byte; | |
5313 | } | |
5314 | else | |
5315 | { | |
5316 | coding->consumed_char = GPT - start; | |
5317 | coding->produced = GPT_BYTE - start_byte; | |
5318 | } | |
5319 | } | |
c185d744 | 5320 | } |
01ca97a2 KH |
5321 | |
5322 | if (coding->produced > 0) | |
c185d744 | 5323 | { |
ce2fe65a AS |
5324 | coding->produced |
5325 | -= emacs_write (desc, | |
5326 | STRINGP (coding->dst_object) | |
5327 | ? SSDATA (coding->dst_object) | |
5328 | : (char *) BYTE_POS_ADDR (coding->dst_pos_byte), | |
5329 | coding->produced); | |
01ca97a2 KH |
5330 | |
5331 | if (coding->produced) | |
f75d7a91 | 5332 | return 0; |
570d7624 | 5333 | } |
01ca97a2 | 5334 | start += coding->consumed_char; |
c185d744 KH |
5335 | } |
5336 | ||
f75d7a91 | 5337 | return 1; |
570d7624 | 5338 | } |
ec7adf26 | 5339 | \f |
a7ca3326 | 5340 | DEFUN ("verify-visited-file-modtime", Fverify_visited_file_modtime, |
ec1b9b17 | 5341 | Sverify_visited_file_modtime, 0, 1, 0, |
8c1a1077 | 5342 | doc: /* Return t if last mod time of BUF's visited file matches what BUF records. |
6b61353c | 5343 | This means that the file has not been changed since it was visited or saved. |
ec1b9b17 | 5344 | If BUF is omitted or nil, it defaults to the current buffer. |
6b61353c | 5345 | See Info node `(elisp)Modification Time' for more details. */) |
5842a27b | 5346 | (Lisp_Object buf) |
570d7624 JB |
5347 | { |
5348 | struct buffer *b; | |
5349 | struct stat st; | |
32f4334d | 5350 | Lisp_Object handler; |
b1d1b865 | 5351 | Lisp_Object filename; |
b95a9c0c | 5352 | EMACS_TIME mtime; |
570d7624 | 5353 | |
ec1b9b17 GM |
5354 | if (NILP (buf)) |
5355 | b = current_buffer; | |
5356 | else | |
5357 | { | |
5358 | CHECK_BUFFER (buf); | |
5359 | b = XBUFFER (buf); | |
5360 | } | |
570d7624 | 5361 | |
4b4deea2 | 5362 | if (!STRINGP (BVAR (b, filename))) return Qt; |
d35af63c | 5363 | if (EMACS_NSECS (b->modtime) == UNKNOWN_MODTIME_NSECS) return Qt; |
570d7624 | 5364 | |
32f4334d RS |
5365 | /* If the file name has special constructs in it, |
5366 | call the corresponding file handler. */ | |
4b4deea2 | 5367 | handler = Ffind_file_name_handler (BVAR (b, filename), |
49307295 | 5368 | Qverify_visited_file_modtime); |
32f4334d | 5369 | if (!NILP (handler)) |
09121adc | 5370 | return call2 (handler, Qverify_visited_file_modtime, buf); |
32f4334d | 5371 | |
4b4deea2 | 5372 | filename = ENCODE_FILE (BVAR (b, filename)); |
b1d1b865 | 5373 | |
dbeed9a6 PE |
5374 | mtime = (stat (SSDATA (filename), &st) == 0 |
5375 | ? get_stat_mtime (&st) | |
f0941253 | 5376 | : time_error_value (errno)); |
b95a9c0c | 5377 | if (EMACS_TIME_EQ (mtime, b->modtime) |
645c6a30 PE |
5378 | && (b->modtime_size < 0 |
5379 | || st.st_size == b->modtime_size)) | |
570d7624 JB |
5380 | return Qt; |
5381 | return Qnil; | |
5382 | } | |
5383 | ||
5384 | DEFUN ("clear-visited-file-modtime", Fclear_visited_file_modtime, | |
8c1a1077 PJ |
5385 | Sclear_visited_file_modtime, 0, 0, 0, |
5386 | doc: /* Clear out records of last mod time of visited file. | |
5387 | Next attempt to save will certainly not complain of a discrepancy. */) | |
5842a27b | 5388 | (void) |
570d7624 | 5389 | { |
e9a9ae03 | 5390 | current_buffer->modtime = make_emacs_time (0, UNKNOWN_MODTIME_NSECS); |
58b963f7 | 5391 | current_buffer->modtime_size = -1; |
570d7624 JB |
5392 | return Qnil; |
5393 | } | |
5394 | ||
f5d5eccf | 5395 | DEFUN ("visited-file-modtime", Fvisited_file_modtime, |
8c1a1077 PJ |
5396 | Svisited_file_modtime, 0, 0, 0, |
5397 | doc: /* Return the current buffer's recorded visited file modification time. | |
d35af63c | 5398 | The value is a list of the form (HIGH LOW USEC PSEC), like the time values that |
1c4d7f3d LMI |
5399 | `file-attributes' returns. If the current buffer has no recorded file |
5400 | modification time, this function returns 0. If the visited file | |
9d1d6e68 | 5401 | doesn't exist, HIGH will be -1. |
6b61353c | 5402 | See Info node `(elisp)Modification Time' for more details. */) |
5842a27b | 5403 | (void) |
f5d5eccf | 5404 | { |
d35af63c | 5405 | if (EMACS_NSECS (current_buffer->modtime) < 0) |
184246df PE |
5406 | { |
5407 | if (EMACS_NSECS (current_buffer->modtime) == NONEXISTENT_MODTIME_NSECS) | |
5408 | { | |
5409 | /* make_lisp_time won't work here if time_t is unsigned. */ | |
3de717bd | 5410 | return list4i (-1, 65535, 0, 0); |
184246df PE |
5411 | } |
5412 | return make_number (0); | |
5413 | } | |
d35af63c | 5414 | return make_lisp_time (current_buffer->modtime); |
f5d5eccf RS |
5415 | } |
5416 | ||
570d7624 | 5417 | DEFUN ("set-visited-file-modtime", Fset_visited_file_modtime, |
8c1a1077 PJ |
5418 | Sset_visited_file_modtime, 0, 1, 0, |
5419 | doc: /* Update buffer's recorded modification time from the visited file's time. | |
5420 | Useful if the buffer was not read from the file normally | |
5421 | or if the file itself has been changed for some known benign reason. | |
5422 | An argument specifies the modification time value to use | |
5423 | \(instead of that of the visited file), in the form of a list | |
d35af63c | 5424 | \(HIGH LOW USEC PSEC) as returned by `current-time'. */) |
5842a27b | 5425 | (Lisp_Object time_list) |
570d7624 | 5426 | { |
f5d5eccf | 5427 | if (!NILP (time_list)) |
58b963f7 | 5428 | { |
31571fd7 | 5429 | current_buffer->modtime = lisp_time_argument (time_list); |
58b963f7 SM |
5430 | current_buffer->modtime_size = -1; |
5431 | } | |
f5d5eccf RS |
5432 | else |
5433 | { | |
5434 | register Lisp_Object filename; | |
5435 | struct stat st; | |
5436 | Lisp_Object handler; | |
570d7624 | 5437 | |
4b4deea2 | 5438 | filename = Fexpand_file_name (BVAR (current_buffer, filename), Qnil); |
32f4334d | 5439 | |
f5d5eccf RS |
5440 | /* If the file name has special constructs in it, |
5441 | call the corresponding file handler. */ | |
49307295 | 5442 | handler = Ffind_file_name_handler (filename, Qset_visited_file_modtime); |
f5d5eccf | 5443 | if (!NILP (handler)) |
caf3c431 | 5444 | /* The handler can find the file name the same way we did. */ |
76c881b0 | 5445 | return call2 (handler, Qset_visited_file_modtime, Qnil); |
b1d1b865 RS |
5446 | |
5447 | filename = ENCODE_FILE (filename); | |
5448 | ||
42a5b22f | 5449 | if (stat (SSDATA (filename), &st) >= 0) |
58b963f7 | 5450 | { |
d35af63c | 5451 | current_buffer->modtime = get_stat_mtime (&st); |
58b963f7 SM |
5452 | current_buffer->modtime_size = st.st_size; |
5453 | } | |
f5d5eccf | 5454 | } |
570d7624 JB |
5455 | |
5456 | return Qnil; | |
5457 | } | |
5458 | \f | |
f14b7e14 | 5459 | static Lisp_Object |
f839df0c | 5460 | auto_save_error (Lisp_Object error_val) |
570d7624 | 5461 | { |
d7f31e22 | 5462 | Lisp_Object args[3], msg; |
b09cca6a | 5463 | int i; |
d7f31e22 | 5464 | struct gcpro gcpro1; |
efdc16c9 | 5465 | |
ca730bf0 CY |
5466 | auto_save_error_occurred = 1; |
5467 | ||
385ed61f | 5468 | ring_bell (XFRAME (selected_frame)); |
efdc16c9 | 5469 | |
d7f31e22 | 5470 | args[0] = build_string ("Auto-saving %s: %s"); |
4b4deea2 | 5471 | args[1] = BVAR (current_buffer, name); |
f839df0c | 5472 | args[2] = Ferror_message_string (error_val); |
d7f31e22 GM |
5473 | msg = Fformat (3, args); |
5474 | GCPRO1 (msg); | |
d7f31e22 GM |
5475 | |
5476 | for (i = 0; i < 3; ++i) | |
5477 | { | |
5478 | if (i == 0) | |
b09cca6a | 5479 | message3 (msg); |
d7f31e22 | 5480 | else |
b09cca6a | 5481 | message3_nolog (msg); |
d7f31e22 GM |
5482 | Fsleep_for (make_number (1), Qnil); |
5483 | } | |
5484 | ||
5485 | UNGCPRO; | |
570d7624 JB |
5486 | return Qnil; |
5487 | } | |
5488 | ||
f14b7e14 | 5489 | static Lisp_Object |
971de7fb | 5490 | auto_save_1 (void) |
570d7624 | 5491 | { |
570d7624 | 5492 | struct stat st; |
d4a42098 KS |
5493 | Lisp_Object modes; |
5494 | ||
5495 | auto_save_mode_bits = 0666; | |
570d7624 JB |
5496 | |
5497 | /* Get visited file's mode to become the auto save file's mode. */ | |
4b4deea2 | 5498 | if (! NILP (BVAR (current_buffer, filename))) |
d4a42098 | 5499 | { |
4b4deea2 | 5500 | if (stat (SSDATA (BVAR (current_buffer, filename)), &st) >= 0) |
d4a42098 | 5501 | /* But make sure we can overwrite it later! */ |
18c52557 | 5502 | auto_save_mode_bits = (st.st_mode | 0600) & 0777; |
ce2fe65a AS |
5503 | else if (modes = Ffile_modes (BVAR (current_buffer, filename)), |
5504 | INTEGERP (modes)) | |
d4a42098 | 5505 | /* Remote files don't cooperate with stat. */ |
18c52557 | 5506 | auto_save_mode_bits = (XINT (modes) | 0600) & 0777; |
d4a42098 | 5507 | } |
570d7624 JB |
5508 | |
5509 | return | |
4b4deea2 | 5510 | Fwrite_region (Qnil, Qnil, BVAR (current_buffer, auto_save_file_name), Qnil, |
699b53bc CY |
5511 | NILP (Vauto_save_visited_file_name) ? Qlambda : Qt, |
5512 | Qnil, Qnil); | |
570d7624 JB |
5513 | } |
5514 | ||
e54d3b5d | 5515 | static Lisp_Object |
971de7fb | 5516 | do_auto_save_unwind (Lisp_Object arg) /* used as unwind-protect function */ |
410ed5c3 | 5517 | |
e54d3b5d | 5518 | { |
2b30549c | 5519 | FILE *stream = XSAVE_POINTER (arg, 0); |
3be3c08e | 5520 | auto_saving = 0; |
fff7e982 | 5521 | if (stream != NULL) |
aab12958 | 5522 | { |
4d7e6e51 | 5523 | block_input (); |
aab12958 | 5524 | fclose (stream); |
4d7e6e51 | 5525 | unblock_input (); |
aab12958 | 5526 | } |
e54d3b5d RS |
5527 | return Qnil; |
5528 | } | |
5529 | ||
a8c828be | 5530 | static Lisp_Object |
971de7fb | 5531 | do_auto_save_unwind_1 (Lisp_Object value) /* used as unwind-protect function */ |
410ed5c3 | 5532 | |
a8c828be RS |
5533 | { |
5534 | minibuffer_auto_raise = XINT (value); | |
5535 | return Qnil; | |
5536 | } | |
5537 | ||
5794dd61 | 5538 | static Lisp_Object |
971de7fb | 5539 | do_auto_save_make_dir (Lisp_Object dir) |
5794dd61 | 5540 | { |
09450bae | 5541 | Lisp_Object result; |
26816cbf | 5542 | |
09450bae PE |
5543 | auto_saving_dir_umask = 077; |
5544 | result = call2 (Qmake_directory, dir, Qt); | |
5545 | auto_saving_dir_umask = 0; | |
5546 | return result; | |
5794dd61 RS |
5547 | } |
5548 | ||
5549 | static Lisp_Object | |
971de7fb | 5550 | do_auto_save_eh (Lisp_Object ignore) |
5794dd61 | 5551 | { |
09450bae | 5552 | auto_saving_dir_umask = 0; |
5794dd61 RS |
5553 | return Qnil; |
5554 | } | |
5555 | ||
a7ca3326 | 5556 | DEFUN ("do-auto-save", Fdo_auto_save, Sdo_auto_save, 0, 2, "", |
8c1a1077 PJ |
5557 | doc: /* Auto-save all buffers that need it. |
5558 | This is all buffers that have auto-saving enabled | |
5559 | and are changed since last auto-saved. | |
5560 | Auto-saving writes the buffer into a file | |
5561 | so that your editing is not lost if the system crashes. | |
5562 | This file is not the file you visited; that changes only when you save. | |
5563 | Normally we run the normal hook `auto-save-hook' before saving. | |
5564 | ||
5565 | A non-nil NO-MESSAGE argument means do not print any message if successful. | |
5566 | A non-nil CURRENT-ONLY argument means save only current buffer. */) | |
5842a27b | 5567 | (Lisp_Object no_message, Lisp_Object current_only) |
570d7624 JB |
5568 | { |
5569 | struct buffer *old = current_buffer, *b; | |
dee091a3 | 5570 | Lisp_Object tail, buf, hook; |
f75d7a91 | 5571 | bool auto_saved = 0; |
f14b1c68 | 5572 | int do_handled_files; |
ff4c9993 | 5573 | Lisp_Object oquit; |
fff7e982 | 5574 | FILE *stream = NULL; |
d311d28c | 5575 | ptrdiff_t count = SPECPDL_INDEX (); |
f75d7a91 | 5576 | bool orig_minibuffer_auto_raise = minibuffer_auto_raise; |
fce31d69 | 5577 | bool old_message_p = 0; |
d57563b6 | 5578 | struct gcpro gcpro1, gcpro2; |
38da540d RS |
5579 | |
5580 | if (max_specpdl_size < specpdl_size + 40) | |
5581 | max_specpdl_size = specpdl_size + 40; | |
5582 | ||
5583 | if (minibuf_level) | |
5584 | no_message = Qt; | |
5585 | ||
5794dd61 RS |
5586 | if (NILP (no_message)) |
5587 | { | |
5588 | old_message_p = push_message (); | |
5589 | record_unwind_protect (pop_message_unwind, Qnil); | |
5590 | } | |
efdc16c9 | 5591 | |
ff4c9993 RS |
5592 | /* Ordinarily don't quit within this function, |
5593 | but don't make it impossible to quit (in case we get hung in I/O). */ | |
5594 | oquit = Vquit_flag; | |
5595 | Vquit_flag = Qnil; | |
570d7624 JB |
5596 | |
5597 | /* No GCPRO needed, because (when it matters) all Lisp_Object variables | |
5598 | point to non-strings reached from Vbuffer_alist. */ | |
5599 | ||
dee091a3 JD |
5600 | hook = intern ("auto-save-hook"); |
5601 | Frun_hooks (1, &hook); | |
570d7624 | 5602 | |
e54d3b5d RS |
5603 | if (STRINGP (Vauto_save_list_file_name)) |
5604 | { | |
0894672f | 5605 | Lisp_Object listfile; |
efdc16c9 | 5606 | |
258fd2cb | 5607 | listfile = Fexpand_file_name (Vauto_save_list_file_name, Qnil); |
0894672f GM |
5608 | |
5609 | /* Don't try to create the directory when shutting down Emacs, | |
5610 | because creating the directory might signal an error, and | |
5611 | that would leave Emacs in a strange state. */ | |
5612 | if (!NILP (Vrun_hooks)) | |
5613 | { | |
5614 | Lisp_Object dir; | |
d57563b6 RS |
5615 | dir = Qnil; |
5616 | GCPRO2 (dir, listfile); | |
0894672f GM |
5617 | dir = Ffile_name_directory (listfile); |
5618 | if (NILP (Ffile_directory_p (dir))) | |
5794dd61 | 5619 | internal_condition_case_1 (do_auto_save_make_dir, |
09450bae | 5620 | dir, Qt, |
5794dd61 | 5621 | do_auto_save_eh); |
d57563b6 | 5622 | UNGCPRO; |
0894672f | 5623 | } |
efdc16c9 | 5624 | |
42a5b22f | 5625 | stream = fopen (SSDATA (listfile), "w"); |
1b335d29 | 5626 | } |
199607e4 | 5627 | |
fff7e982 | 5628 | record_unwind_protect (do_auto_save_unwind, |
468afbac | 5629 | make_save_pointer (stream)); |
a8c828be RS |
5630 | record_unwind_protect (do_auto_save_unwind_1, |
5631 | make_number (minibuffer_auto_raise)); | |
5632 | minibuffer_auto_raise = 0; | |
3be3c08e | 5633 | auto_saving = 1; |
ca730bf0 | 5634 | auto_save_error_occurred = 0; |
3be3c08e | 5635 | |
6b61353c KH |
5636 | /* On first pass, save all files that don't have handlers. |
5637 | On second pass, save all files that do have handlers. | |
5638 | ||
5639 | If Emacs is crashing, the handlers may tweak what is causing | |
5640 | Emacs to crash in the first place, and it would be a shame if | |
5641 | Emacs failed to autosave perfectly ordinary files because it | |
5642 | couldn't handle some ange-ftp'd file. */ | |
5643 | ||
f14b1c68 | 5644 | for (do_handled_files = 0; do_handled_files < 2; do_handled_files++) |
8e50cc2d | 5645 | for (tail = Vbuffer_alist; CONSP (tail); tail = XCDR (tail)) |
f14b1c68 | 5646 | { |
03699b14 | 5647 | buf = XCDR (XCAR (tail)); |
f14b1c68 | 5648 | b = XBUFFER (buf); |
199607e4 | 5649 | |
e54d3b5d | 5650 | /* Record all the buffers that have auto save mode |
258fd2cb RS |
5651 | in the special file that lists them. For each of these buffers, |
5652 | Record visited name (if any) and auto save name. */ | |
4b4deea2 | 5653 | if (STRINGP (BVAR (b, auto_save_file_name)) |
1b335d29 | 5654 | && stream != NULL && do_handled_files == 0) |
e54d3b5d | 5655 | { |
4d7e6e51 | 5656 | block_input (); |
4b4deea2 | 5657 | if (!NILP (BVAR (b, filename))) |
258fd2cb | 5658 | { |
4b4deea2 TT |
5659 | fwrite (SDATA (BVAR (b, filename)), 1, |
5660 | SBYTES (BVAR (b, filename)), stream); | |
258fd2cb | 5661 | } |
1b335d29 | 5662 | putc ('\n', stream); |
4b4deea2 TT |
5663 | fwrite (SDATA (BVAR (b, auto_save_file_name)), 1, |
5664 | SBYTES (BVAR (b, auto_save_file_name)), stream); | |
1b335d29 | 5665 | putc ('\n', stream); |
4d7e6e51 | 5666 | unblock_input (); |
e54d3b5d | 5667 | } |
17857782 | 5668 | |
f14b1c68 JB |
5669 | if (!NILP (current_only) |
5670 | && b != current_buffer) | |
5671 | continue; | |
e54d3b5d | 5672 | |
95385625 RS |
5673 | /* Don't auto-save indirect buffers. |
5674 | The base buffer takes care of it. */ | |
5675 | if (b->base_buffer) | |
5676 | continue; | |
5677 | ||
f14b1c68 JB |
5678 | /* Check for auto save enabled |
5679 | and file changed since last auto save | |
5680 | and file changed since last real save. */ | |
4b4deea2 | 5681 | if (STRINGP (BVAR (b, auto_save_file_name)) |
95385625 | 5682 | && BUF_SAVE_MODIFF (b) < BUF_MODIFF (b) |
0b5397c2 | 5683 | && BUF_AUTOSAVE_MODIFF (b) < BUF_MODIFF (b) |
82c2d839 | 5684 | /* -1 means we've turned off autosaving for a while--see below. */ |
4b4deea2 | 5685 | && XINT (BVAR (b, save_length)) >= 0 |
f14b1c68 | 5686 | && (do_handled_files |
4b4deea2 | 5687 | || NILP (Ffind_file_name_handler (BVAR (b, auto_save_file_name), |
49307295 | 5688 | Qwrite_region)))) |
f14b1c68 | 5689 | { |
e9a9ae03 PE |
5690 | EMACS_TIME before_time = current_emacs_time (); |
5691 | EMACS_TIME after_time; | |
b60247d9 RS |
5692 | |
5693 | /* If we had a failure, don't try again for 20 minutes. */ | |
d311d28c | 5694 | if (b->auto_save_failure_time > 0 |
b60247d9 RS |
5695 | && EMACS_SECS (before_time) - b->auto_save_failure_time < 1200) |
5696 | continue; | |
5697 | ||
090101cf CY |
5698 | set_buffer_internal (b); |
5699 | if (NILP (Vauto_save_include_big_deletions) | |
4b4deea2 | 5700 | && (XFASTINT (BVAR (b, save_length)) * 10 |
4be941e3 | 5701 | > (BUF_Z (b) - BUF_BEG (b)) * 13) |
f14b1c68 JB |
5702 | /* A short file is likely to change a large fraction; |
5703 | spare the user annoying messages. */ | |
4b4deea2 | 5704 | && XFASTINT (BVAR (b, save_length)) > 5000 |
f14b1c68 | 5705 | /* These messages are frequent and annoying for `*mail*'. */ |
4b4deea2 | 5706 | && !EQ (BVAR (b, filename), Qnil) |
f14b1c68 JB |
5707 | && NILP (no_message)) |
5708 | { | |
5709 | /* It has shrunk too much; turn off auto-saving here. */ | |
a8c828be | 5710 | minibuffer_auto_raise = orig_minibuffer_auto_raise; |
fd91d0d4 | 5711 | message_with_string ("Buffer %s has shrunk a lot; auto save disabled in that buffer until next real save", |
4b4deea2 | 5712 | BVAR (b, name), 1); |
a8c828be | 5713 | minibuffer_auto_raise = 0; |
82c2d839 RS |
5714 | /* Turn off auto-saving until there's a real save, |
5715 | and prevent any more warnings. */ | |
4b4deea2 | 5716 | XSETINT (BVAR (b, save_length), -1); |
f14b1c68 JB |
5717 | Fsleep_for (make_number (1), Qnil); |
5718 | continue; | |
5719 | } | |
f14b1c68 JB |
5720 | if (!auto_saved && NILP (no_message)) |
5721 | message1 ("Auto-saving..."); | |
5722 | internal_condition_case (auto_save_1, Qt, auto_save_error); | |
f75d7a91 | 5723 | auto_saved = 1; |
0b5397c2 | 5724 | BUF_AUTOSAVE_MODIFF (b) = BUF_MODIFF (b); |
4b4deea2 | 5725 | XSETFASTINT (BVAR (current_buffer, save_length), Z - BEG); |
f14b1c68 | 5726 | set_buffer_internal (old); |
b60247d9 | 5727 | |
e9a9ae03 | 5728 | after_time = current_emacs_time (); |
b60247d9 RS |
5729 | |
5730 | /* If auto-save took more than 60 seconds, | |
5731 | assume it was an NFS failure that got a timeout. */ | |
5732 | if (EMACS_SECS (after_time) - EMACS_SECS (before_time) > 60) | |
5733 | b->auto_save_failure_time = EMACS_SECS (after_time); | |
f14b1c68 JB |
5734 | } |
5735 | } | |
570d7624 | 5736 | |
b67f2ca5 RS |
5737 | /* Prevent another auto save till enough input events come in. */ |
5738 | record_auto_save (); | |
570d7624 | 5739 | |
17857782 | 5740 | if (auto_saved && NILP (no_message)) |
f05b275b | 5741 | { |
5794dd61 | 5742 | if (old_message_p) |
31f3d831 | 5743 | { |
5794dd61 RS |
5744 | /* If we are going to restore an old message, |
5745 | give time to read ours. */ | |
83f8d903 | 5746 | sit_for (make_number (1), 0, 0); |
c71106e5 | 5747 | restore_message (); |
31f3d831 | 5748 | } |
ca730bf0 | 5749 | else if (!auto_save_error_occurred) |
31e31a15 CY |
5750 | /* Don't overwrite the error message if an error occurred. |
5751 | If we displayed a message and then restored a state | |
5794dd61 | 5752 | with no message, leave a "done" message on the screen. */ |
f05b275b KH |
5753 | message1 ("Auto-saving...done"); |
5754 | } | |
570d7624 | 5755 | |
ff4c9993 RS |
5756 | Vquit_flag = oquit; |
5757 | ||
5794dd61 | 5758 | /* This restores the message-stack status. */ |
e54d3b5d | 5759 | unbind_to (count, Qnil); |
570d7624 JB |
5760 | return Qnil; |
5761 | } | |
5762 | ||
5763 | DEFUN ("set-buffer-auto-saved", Fset_buffer_auto_saved, | |
8c1a1077 PJ |
5764 | Sset_buffer_auto_saved, 0, 0, 0, |
5765 | doc: /* Mark current buffer as auto-saved with its current text. | |
5766 | No auto-save file will be written until the buffer changes again. */) | |
5842a27b | 5767 | (void) |
570d7624 | 5768 | { |
0b5397c2 SM |
5769 | /* FIXME: This should not be called in indirect buffers, since |
5770 | they're not autosaved. */ | |
5771 | BUF_AUTOSAVE_MODIFF (current_buffer) = MODIFF; | |
4b4deea2 | 5772 | XSETFASTINT (BVAR (current_buffer, save_length), Z - BEG); |
d311d28c | 5773 | current_buffer->auto_save_failure_time = 0; |
b60247d9 RS |
5774 | return Qnil; |
5775 | } | |
5776 | ||
5777 | DEFUN ("clear-buffer-auto-save-failure", Fclear_buffer_auto_save_failure, | |
8c1a1077 PJ |
5778 | Sclear_buffer_auto_save_failure, 0, 0, 0, |
5779 | doc: /* Clear any record of a recent auto-save failure in the current buffer. */) | |
5842a27b | 5780 | (void) |
b60247d9 | 5781 | { |
d311d28c | 5782 | current_buffer->auto_save_failure_time = 0; |
570d7624 JB |
5783 | return Qnil; |
5784 | } | |
5785 | ||
5786 | DEFUN ("recent-auto-save-p", Frecent_auto_save_p, Srecent_auto_save_p, | |
8c1a1077 | 5787 | 0, 0, 0, |
68780e2a RS |
5788 | doc: /* Return t if current buffer has been auto-saved recently. |
5789 | More precisely, if it has been auto-saved since last read from or saved | |
5790 | in the visited file. If the buffer has no visited file, | |
5791 | then any auto-save counts as "recent". */) | |
5842a27b | 5792 | (void) |
570d7624 | 5793 | { |
0b5397c2 SM |
5794 | /* FIXME: maybe we should return nil for indirect buffers since |
5795 | they're never autosaved. */ | |
5796 | return (SAVE_MODIFF < BUF_AUTOSAVE_MODIFF (current_buffer) ? Qt : Qnil); | |
570d7624 JB |
5797 | } |
5798 | \f | |
5799 | /* Reading and completing file names */ | |
6e710ae5 | 5800 | |
88208bb8 JD |
5801 | DEFUN ("next-read-file-uses-dialog-p", Fnext_read_file_uses_dialog_p, |
5802 | Snext_read_file_uses_dialog_p, 0, 0, 0, | |
5803 | doc: /* Return t if a call to `read-file-name' will use a dialog. | |
5804 | The return value is only relevant for a call to `read-file-name' that happens | |
1a0de25c | 5805 | before any other event (mouse or keypress) is handled. */) |
5842a27b | 5806 | (void) |
88208bb8 | 5807 | { |
d7e642cc JD |
5808 | #if defined (USE_MOTIF) || defined (HAVE_NTGUI) || defined (USE_GTK) \ |
5809 | || defined (HAVE_NS) | |
88208bb8 JD |
5810 | if ((NILP (last_nonmenu_event) || CONSP (last_nonmenu_event)) |
5811 | && use_dialog_box | |
5812 | && use_file_dialog | |
7452b7bd | 5813 | && window_system_available (SELECTED_FRAME ())) |
88208bb8 JD |
5814 | return Qt; |
5815 | #endif | |
5816 | return Qnil; | |
5817 | } | |
d4a42098 | 5818 | |
dbd50d4b | 5819 | Lisp_Object |
971de7fb | 5820 | Fread_file_name (Lisp_Object prompt, Lisp_Object dir, Lisp_Object default_filename, Lisp_Object mustmatch, Lisp_Object initial, Lisp_Object predicate) |
570d7624 | 5821 | { |
fd4ead52 | 5822 | struct gcpro gcpro1; |
dbd50d4b | 5823 | Lisp_Object args[7]; |
a79485af | 5824 | |
71e1f69d | 5825 | GCPRO1 (default_filename); |
dbd50d4b SM |
5826 | args[0] = intern ("read-file-name"); |
5827 | args[1] = prompt; | |
5828 | args[2] = dir; | |
5829 | args[3] = default_filename; | |
5830 | args[4] = mustmatch; | |
5831 | args[5] = initial; | |
5832 | args[6] = predicate; | |
5833 | RETURN_UNGCPRO (Ffuncall (7, args)); | |
570d7624 | 5834 | } |
9c856db9 | 5835 | |
570d7624 | 5836 | \f |
9fe43ff6 PE |
5837 | void |
5838 | init_fileio (void) | |
5839 | { | |
5840 | valid_timestamp_file_system = 0; | |
5841 | } | |
5842 | ||
dfcf069d | 5843 | void |
971de7fb | 5844 | syms_of_fileio (void) |
570d7624 | 5845 | { |
cd3520a4 JB |
5846 | DEFSYM (Qoperations, "operations"); |
5847 | DEFSYM (Qexpand_file_name, "expand-file-name"); | |
5848 | DEFSYM (Qsubstitute_in_file_name, "substitute-in-file-name"); | |
5849 | DEFSYM (Qdirectory_file_name, "directory-file-name"); | |
5850 | DEFSYM (Qfile_name_directory, "file-name-directory"); | |
5851 | DEFSYM (Qfile_name_nondirectory, "file-name-nondirectory"); | |
5852 | DEFSYM (Qunhandled_file_name_directory, "unhandled-file-name-directory"); | |
5853 | DEFSYM (Qfile_name_as_directory, "file-name-as-directory"); | |
5854 | DEFSYM (Qcopy_file, "copy-file"); | |
5855 | DEFSYM (Qmake_directory_internal, "make-directory-internal"); | |
5856 | DEFSYM (Qmake_directory, "make-directory"); | |
5857 | DEFSYM (Qdelete_directory_internal, "delete-directory-internal"); | |
5858 | DEFSYM (Qdelete_file, "delete-file"); | |
5859 | DEFSYM (Qrename_file, "rename-file"); | |
5860 | DEFSYM (Qadd_name_to_file, "add-name-to-file"); | |
5861 | DEFSYM (Qmake_symbolic_link, "make-symbolic-link"); | |
5862 | DEFSYM (Qfile_exists_p, "file-exists-p"); | |
5863 | DEFSYM (Qfile_executable_p, "file-executable-p"); | |
5864 | DEFSYM (Qfile_readable_p, "file-readable-p"); | |
5865 | DEFSYM (Qfile_writable_p, "file-writable-p"); | |
5866 | DEFSYM (Qfile_symlink_p, "file-symlink-p"); | |
5867 | DEFSYM (Qaccess_file, "access-file"); | |
5868 | DEFSYM (Qfile_directory_p, "file-directory-p"); | |
5869 | DEFSYM (Qfile_regular_p, "file-regular-p"); | |
5870 | DEFSYM (Qfile_accessible_directory_p, "file-accessible-directory-p"); | |
5871 | DEFSYM (Qfile_modes, "file-modes"); | |
5872 | DEFSYM (Qset_file_modes, "set-file-modes"); | |
5873 | DEFSYM (Qset_file_times, "set-file-times"); | |
5874 | DEFSYM (Qfile_selinux_context, "file-selinux-context"); | |
5875 | DEFSYM (Qset_file_selinux_context, "set-file-selinux-context"); | |
7c3d167f RF |
5876 | DEFSYM (Qfile_acl, "file-acl"); |
5877 | DEFSYM (Qset_file_acl, "set-file-acl"); | |
cd3520a4 JB |
5878 | DEFSYM (Qfile_newer_than_file_p, "file-newer-than-file-p"); |
5879 | DEFSYM (Qinsert_file_contents, "insert-file-contents"); | |
9dbda100 | 5880 | DEFSYM (Qchoose_write_coding_system, "choose-write-coding-system"); |
cd3520a4 JB |
5881 | DEFSYM (Qwrite_region, "write-region"); |
5882 | DEFSYM (Qverify_visited_file_modtime, "verify-visited-file-modtime"); | |
5883 | DEFSYM (Qset_visited_file_modtime, "set-visited-file-modtime"); | |
5884 | DEFSYM (Qauto_save_coding, "auto-save-coding"); | |
5885 | ||
5886 | DEFSYM (Qfile_name_history, "file-name-history"); | |
642ef245 | 5887 | Fset (Qfile_name_history, Qnil); |
15c65264 | 5888 | |
cd3520a4 JB |
5889 | DEFSYM (Qfile_error, "file-error"); |
5890 | DEFSYM (Qfile_already_exists, "file-already-exists"); | |
5891 | DEFSYM (Qfile_date_error, "file-date-error"); | |
5892 | DEFSYM (Qexcl, "excl"); | |
570d7624 | 5893 | |
29208e82 | 5894 | DEFVAR_LISP ("file-name-coding-system", Vfile_name_coding_system, |
fb7ada5f | 5895 | doc: /* Coding system for encoding file names. |
346ebf53 | 5896 | If it is nil, `default-file-name-coding-system' (which see) is used. */); |
b1d1b865 RS |
5897 | Vfile_name_coding_system = Qnil; |
5898 | ||
cd913586 | 5899 | DEFVAR_LISP ("default-file-name-coding-system", |
29208e82 | 5900 | Vdefault_file_name_coding_system, |
8c1a1077 | 5901 | doc: /* Default coding system for encoding file names. |
346ebf53 | 5902 | This variable is used only when `file-name-coding-system' is nil. |
8c1a1077 | 5903 | |
346ebf53 | 5904 | This variable is set/changed by the command `set-language-environment'. |
8c1a1077 | 5905 | User should not set this variable manually, |
346ebf53 | 5906 | instead use `file-name-coding-system' to get a constant encoding |
8c1a1077 | 5907 | of file names regardless of the current language environment. */); |
cd913586 KH |
5908 | Vdefault_file_name_coding_system = Qnil; |
5909 | ||
cd3520a4 JB |
5910 | DEFSYM (Qformat_decode, "format-decode"); |
5911 | DEFSYM (Qformat_annotate_function, "format-annotate-function"); | |
5912 | DEFSYM (Qafter_insert_file_set_coding, "after-insert-file-set-coding"); | |
5913 | DEFSYM (Qcar_less_than_car, "car-less-than-car"); | |
d6a3cc15 | 5914 | |
570d7624 | 5915 | Fput (Qfile_error, Qerror_conditions, |
d67b4f80 | 5916 | Fpurecopy (list2 (Qfile_error, Qerror))); |
570d7624 | 5917 | Fput (Qfile_error, Qerror_message, |
2a0213a6 | 5918 | build_pure_c_string ("File error")); |
570d7624 JB |
5919 | |
5920 | Fput (Qfile_already_exists, Qerror_conditions, | |
d67b4f80 | 5921 | Fpurecopy (list3 (Qfile_already_exists, Qfile_error, Qerror))); |
570d7624 | 5922 | Fput (Qfile_already_exists, Qerror_message, |
2a0213a6 | 5923 | build_pure_c_string ("File already exists")); |
570d7624 | 5924 | |
c0b7b21c | 5925 | Fput (Qfile_date_error, Qerror_conditions, |
d67b4f80 | 5926 | Fpurecopy (list3 (Qfile_date_error, Qfile_error, Qerror))); |
c0b7b21c | 5927 | Fput (Qfile_date_error, Qerror_message, |
2a0213a6 | 5928 | build_pure_c_string ("Cannot set file date")); |
c0b7b21c | 5929 | |
29208e82 | 5930 | DEFVAR_LISP ("file-name-handler-alist", Vfile_name_handler_alist, |
a59225b1 CY |
5931 | doc: /* Alist of elements (REGEXP . HANDLER) for file names handled specially. |
5932 | If a file name matches REGEXP, all I/O on that file is done by calling | |
5933 | HANDLER. If a file name matches more than one handler, the handler | |
5934 | whose match starts last in the file name gets precedence. The | |
5935 | function `find-file-name-handler' checks this list for a handler for | |
5936 | its argument. | |
5937 | ||
5938 | HANDLER should be a function. The first argument given to it is the | |
5939 | name of the I/O primitive to be handled; the remaining arguments are | |
5940 | the arguments that were passed to that primitive. For example, if you | |
5941 | do (file-exists-p FILENAME) and FILENAME is handled by HANDLER, then | |
5942 | HANDLER is called like this: | |
5943 | ||
5944 | (funcall HANDLER 'file-exists-p FILENAME) | |
5945 | ||
5946 | Note that HANDLER must be able to handle all I/O primitives; if it has | |
5947 | nothing special to do for a primitive, it should reinvoke the | |
5948 | primitive to handle the operation \"the usual way\". | |
5949 | See Info node `(elisp)Magic File Names' for more details. */); | |
09121adc RS |
5950 | Vfile_name_handler_alist = Qnil; |
5951 | ||
0414b394 | 5952 | DEFVAR_LISP ("set-auto-coding-function", |
29208e82 | 5953 | Vset_auto_coding_function, |
8c1a1077 PJ |
5954 | doc: /* If non-nil, a function to call to decide a coding system of file. |
5955 | Two arguments are passed to this function: the file name | |
5956 | and the length of a file contents following the point. | |
5957 | This function should return a coding system to decode the file contents. | |
5958 | It should check the file name against `auto-coding-alist'. | |
5959 | If no coding system is decided, it should check a coding system | |
5960 | specified in the heading lines with the format: | |
5961 | -*- ... coding: CODING-SYSTEM; ... -*- | |
5962 | or local variable spec of the tailing lines with `coding:' tag. */); | |
0414b394 | 5963 | Vset_auto_coding_function = Qnil; |
c9e82392 | 5964 | |
29208e82 | 5965 | DEFVAR_LISP ("after-insert-file-functions", Vafter_insert_file_functions, |
8c1a1077 | 5966 | doc: /* A list of functions to be called at the end of `insert-file-contents'. |
0cf9f5b5 RS |
5967 | Each is passed one argument, the number of characters inserted, |
5968 | with point at the start of the inserted text. Each function | |
5969 | should leave point the same, and return the new character count. | |
cf6d2357 RS |
5970 | If `insert-file-contents' is intercepted by a handler from |
5971 | `file-name-handler-alist', that handler is responsible for calling the | |
5972 | functions in `after-insert-file-functions' if appropriate. */); | |
d6a3cc15 RS |
5973 | Vafter_insert_file_functions = Qnil; |
5974 | ||
29208e82 | 5975 | DEFVAR_LISP ("write-region-annotate-functions", Vwrite_region_annotate_functions, |
8c1a1077 PJ |
5976 | doc: /* A list of functions to be called at the start of `write-region'. |
5977 | Each is passed two arguments, START and END as for `write-region'. | |
5978 | These are usually two numbers but not always; see the documentation | |
5979 | for `write-region'. The function should return a list of pairs | |
5980 | of the form (POSITION . STRING), consisting of strings to be effectively | |
5981 | inserted at the specified positions of the file being written (1 means to | |
5982 | insert before the first byte written). The POSITIONs must be sorted into | |
67fbc0cb CY |
5983 | increasing order. |
5984 | ||
5985 | If there are several annotation functions, the lists returned by these | |
5986 | functions are merged destructively. As each annotation function runs, | |
5987 | the variable `write-region-annotations-so-far' contains a list of all | |
5988 | annotations returned by previous annotation functions. | |
5989 | ||
5990 | An annotation function can return with a different buffer current. | |
5991 | Doing so removes the annotations returned by previous functions, and | |
5992 | resets START and END to `point-min' and `point-max' of the new buffer. | |
5993 | ||
5994 | After `write-region' completes, Emacs calls the function stored in | |
5995 | `write-region-post-annotation-function', once for each buffer that was | |
5996 | current when building the annotations (i.e., at least once), with that | |
5997 | buffer current. */); | |
d6a3cc15 | 5998 | Vwrite_region_annotate_functions = Qnil; |
cd3520a4 | 5999 | DEFSYM (Qwrite_region_annotate_functions, "write-region-annotate-functions"); |
d6a3cc15 | 6000 | |
67fbc0cb | 6001 | DEFVAR_LISP ("write-region-post-annotation-function", |
29208e82 | 6002 | Vwrite_region_post_annotation_function, |
67fbc0cb CY |
6003 | doc: /* Function to call after `write-region' completes. |
6004 | The function is called with no arguments. If one or more of the | |
6005 | annotation functions in `write-region-annotate-functions' changed the | |
6006 | current buffer, the function stored in this variable is called for | |
6007 | each of those additional buffers as well, in addition to the original | |
6008 | buffer. The relevant buffer is current during each function call. */); | |
6009 | Vwrite_region_post_annotation_function = Qnil; | |
6010 | staticpro (&Vwrite_region_annotation_buffers); | |
6011 | ||
6fc6f94b | 6012 | DEFVAR_LISP ("write-region-annotations-so-far", |
29208e82 | 6013 | Vwrite_region_annotations_so_far, |
8c1a1077 PJ |
6014 | doc: /* When an annotation function is called, this holds the previous annotations. |
6015 | These are the annotations made by other annotation functions | |
6016 | that were already called. See also `write-region-annotate-functions'. */); | |
6fc6f94b RS |
6017 | Vwrite_region_annotations_so_far = Qnil; |
6018 | ||
29208e82 | 6019 | DEFVAR_LISP ("inhibit-file-name-handlers", Vinhibit_file_name_handlers, |
8c1a1077 PJ |
6020 | doc: /* A list of file name handlers that temporarily should not be used. |
6021 | This applies only to the operation `inhibit-file-name-operation'. */); | |
82c2d839 RS |
6022 | Vinhibit_file_name_handlers = Qnil; |
6023 | ||
29208e82 | 6024 | DEFVAR_LISP ("inhibit-file-name-operation", Vinhibit_file_name_operation, |
8c1a1077 | 6025 | doc: /* The operation for which `inhibit-file-name-handlers' is applicable. */); |
a65970a0 RS |
6026 | Vinhibit_file_name_operation = Qnil; |
6027 | ||
29208e82 | 6028 | DEFVAR_LISP ("auto-save-list-file-name", Vauto_save_list_file_name, |
8c1a1077 PJ |
6029 | doc: /* File name in which we write a list of all auto save file names. |
6030 | This variable is initialized automatically from `auto-save-list-file-prefix' | |
a2458031 | 6031 | shortly after Emacs reads your init file, if you have not yet given it |
8c1a1077 | 6032 | a non-nil value. */); |
e54d3b5d RS |
6033 | Vauto_save_list_file_name = Qnil; |
6034 | ||
29208e82 | 6035 | DEFVAR_LISP ("auto-save-visited-file-name", Vauto_save_visited_file_name, |
699b53bc CY |
6036 | doc: /* Non-nil says auto-save a buffer in the file it is visiting, when practical. |
6037 | Normally auto-save files are written under other names. */); | |
6038 | Vauto_save_visited_file_name = Qnil; | |
6039 | ||
29208e82 | 6040 | DEFVAR_LISP ("auto-save-include-big-deletions", Vauto_save_include_big_deletions, |
090101cf CY |
6041 | doc: /* If non-nil, auto-save even if a large part of the text is deleted. |
6042 | If nil, deleting a substantial portion of the text disables auto-save | |
6043 | in the buffer; this is the default behavior, because the auto-save | |
6044 | file is usually more useful if it contains the deleted text. */); | |
6045 | Vauto_save_include_big_deletions = Qnil; | |
6046 | ||
cbee2131 PE |
6047 | /* fsync can be a significant performance hit. Often it doesn't |
6048 | suffice to make the file-save operation survive a crash. For | |
6049 | batch scripts, which are typically part of larger shell commands | |
6050 | that don't fsync other files, its effect on performance can be | |
6051 | significant so its utility is particularly questionable. | |
6052 | Hence, for now by default fsync is used only when interactive. | |
6053 | ||
6054 | For more on why fsync often fails to work on today's hardware, see: | |
a37d34f3 PE |
6055 | Zheng M et al. Understanding the robustness of SSDs under power fault. |
6056 | 11th USENIX Conf. on File and Storage Technologies, 2013 (FAST '13), 271-84 | |
cbee2131 PE |
6057 | http://www.usenix.org/system/files/conference/fast13/fast13-final80.pdf |
6058 | ||
6059 | For more on why fsync does not suffice even if it works properly, see: | |
6060 | Roche X. Necessary step(s) to synchronize filename operations on disk. | |
6061 | Austin Group Defect 672, 2013-03-19 | |
6062 | http://austingroupbugs.net/view.php?id=672 */ | |
29208e82 | 6063 | DEFVAR_BOOL ("write-region-inhibit-fsync", write_region_inhibit_fsync, |
fb7ada5f | 6064 | doc: /* Non-nil means don't call fsync in `write-region'. |
e3f509dd | 6065 | This variable affects calls to `write-region' as well as save commands. |
cbee2131 PE |
6066 | Setting this to nil may avoid data loss if the system loses power or |
6067 | the operating system crashes. */); | |
6068 | write_region_inhibit_fsync = noninteractive; | |
ccf61795 | 6069 | |
29208e82 | 6070 | DEFVAR_BOOL ("delete-by-moving-to-trash", delete_by_moving_to_trash, |
6cf29fe8 | 6071 | doc: /* Specifies whether to use the system's trash can. |
f1a5d776 CY |
6072 | When non-nil, certain file deletion commands use the function |
6073 | `move-file-to-trash' instead of deleting files outright. | |
6074 | This includes interactive calls to `delete-file' and | |
6075 | `delete-directory' and the Dired deletion commands. */); | |
6cf29fe8 | 6076 | delete_by_moving_to_trash = 0; |
d67b4f80 | 6077 | Qdelete_by_moving_to_trash = intern_c_string ("delete-by-moving-to-trash"); |
cd3520a4 JB |
6078 | |
6079 | DEFSYM (Qmove_file_to_trash, "move-file-to-trash"); | |
6080 | DEFSYM (Qcopy_directory, "copy-directory"); | |
6081 | DEFSYM (Qdelete_directory, "delete-directory"); | |
6cf29fe8 | 6082 | |
642ef245 | 6083 | defsubr (&Sfind_file_name_handler); |
570d7624 JB |
6084 | defsubr (&Sfile_name_directory); |
6085 | defsubr (&Sfile_name_nondirectory); | |
642ef245 | 6086 | defsubr (&Sunhandled_file_name_directory); |
570d7624 JB |
6087 | defsubr (&Sfile_name_as_directory); |
6088 | defsubr (&Sdirectory_file_name); | |
6089 | defsubr (&Smake_temp_name); | |
6090 | defsubr (&Sexpand_file_name); | |
6091 | defsubr (&Ssubstitute_in_file_name); | |
6092 | defsubr (&Scopy_file); | |
9bbe01fb | 6093 | defsubr (&Smake_directory_internal); |
9d8f3bd9 | 6094 | defsubr (&Sdelete_directory_internal); |
570d7624 JB |
6095 | defsubr (&Sdelete_file); |
6096 | defsubr (&Srename_file); | |
6097 | defsubr (&Sadd_name_to_file); | |
570d7624 | 6098 | defsubr (&Smake_symbolic_link); |
570d7624 JB |
6099 | defsubr (&Sfile_name_absolute_p); |
6100 | defsubr (&Sfile_exists_p); | |
6101 | defsubr (&Sfile_executable_p); | |
6102 | defsubr (&Sfile_readable_p); | |
6103 | defsubr (&Sfile_writable_p); | |
1f8653eb | 6104 | defsubr (&Saccess_file); |
570d7624 JB |
6105 | defsubr (&Sfile_symlink_p); |
6106 | defsubr (&Sfile_directory_p); | |
b72dea2a | 6107 | defsubr (&Sfile_accessible_directory_p); |
f793dc6c | 6108 | defsubr (&Sfile_regular_p); |
570d7624 JB |
6109 | defsubr (&Sfile_modes); |
6110 | defsubr (&Sset_file_modes); | |
819da85b | 6111 | defsubr (&Sset_file_times); |
574c05e2 | 6112 | defsubr (&Sfile_selinux_context); |
7c3d167f RF |
6113 | defsubr (&Sfile_acl); |
6114 | defsubr (&Sset_file_acl); | |
574c05e2 | 6115 | defsubr (&Sset_file_selinux_context); |
c24e9a53 RS |
6116 | defsubr (&Sset_default_file_modes); |
6117 | defsubr (&Sdefault_file_modes); | |
570d7624 JB |
6118 | defsubr (&Sfile_newer_than_file_p); |
6119 | defsubr (&Sinsert_file_contents); | |
9dbda100 | 6120 | defsubr (&Schoose_write_coding_system); |
570d7624 | 6121 | defsubr (&Swrite_region); |
d6a3cc15 | 6122 | defsubr (&Scar_less_than_car); |
570d7624 JB |
6123 | defsubr (&Sverify_visited_file_modtime); |
6124 | defsubr (&Sclear_visited_file_modtime); | |
f5d5eccf | 6125 | defsubr (&Svisited_file_modtime); |
570d7624 JB |
6126 | defsubr (&Sset_visited_file_modtime); |
6127 | defsubr (&Sdo_auto_save); | |
6128 | defsubr (&Sset_buffer_auto_saved); | |
b60247d9 | 6129 | defsubr (&Sclear_buffer_auto_save_failure); |
570d7624 JB |
6130 | defsubr (&Srecent_auto_save_p); |
6131 | ||
88208bb8 | 6132 | defsubr (&Snext_read_file_uses_dialog_p); |
85ffea93 | 6133 | |
697c17a2 | 6134 | #ifdef HAVE_SYNC |
85ffea93 | 6135 | defsubr (&Sunix_sync); |
483a2e10 | 6136 | #endif |
570d7624 | 6137 | } |