Commit | Line | Data |
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570d7624 | 1 | /* File IO for GNU Emacs. |
e9bffc61 | 2 | |
73b0cd50 | 3 | Copyright (C) 1985-1988, 1993-2011 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> | |
d7306fe6 | 26 | #include <setjmp.h> |
29beb080 | 27 | #include <unistd.h> |
29beb080 | 28 | |
5b9c0a1d | 29 | #ifdef HAVE_PWD_H |
570d7624 | 30 | #include <pwd.h> |
bfb61299 JB |
31 | #endif |
32 | ||
570d7624 | 33 | #include <ctype.h> |
570d7624 JB |
34 | #include <errno.h> |
35 | ||
574c05e2 KK |
36 | #ifdef HAVE_LIBSELINUX |
37 | #include <selinux/selinux.h> | |
38 | #include <selinux/context.h> | |
39 | #endif | |
40 | ||
570d7624 | 41 | #include "lisp.h" |
8d4e077b | 42 | #include "intervals.h" |
570d7624 | 43 | #include "buffer.h" |
db327c7e | 44 | #include "character.h" |
6fdaa9a0 | 45 | #include "coding.h" |
570d7624 | 46 | #include "window.h" |
67c08d6c | 47 | #include "blockinput.h" |
385ed61f KL |
48 | #include "frame.h" |
49 | #include "dispextern.h" | |
570d7624 | 50 | |
5e570b75 RS |
51 | #ifdef WINDOWSNT |
52 | #define NOMINMAX 1 | |
53 | #include <windows.h> | |
5e570b75 RS |
54 | #include <fcntl.h> |
55 | #endif /* not WINDOWSNT */ | |
56 | ||
7990d02a EZ |
57 | #ifdef MSDOS |
58 | #include "msdos.h" | |
59 | #include <sys/param.h> | |
7990d02a | 60 | #include <fcntl.h> |
7990d02a | 61 | #endif |
7990d02a | 62 | |
199607e4 | 63 | #ifdef DOS_NT |
199607e4 RS |
64 | /* On Windows, drive letters must be alphabetic - on DOS, the Netware |
65 | redirector allows the six letters between 'Z' and 'a' as well. */ | |
66 | #ifdef MSDOS | |
67 | #define IS_DRIVE(x) ((x) >= 'A' && (x) <= 'z') | |
68 | #endif | |
69 | #ifdef WINDOWSNT | |
5976c3fe | 70 | #define IS_DRIVE(x) isalpha ((unsigned char) (x)) |
199607e4 | 71 | #endif |
f54b565c MB |
72 | /* Need to lower-case the drive letter, or else expanded |
73 | filenames will sometimes compare inequal, because | |
74 | `expand-file-name' doesn't always down-case the drive letter. */ | |
5976c3fe | 75 | #define DRIVE_LETTER(x) (tolower ((unsigned char) (x))) |
199607e4 RS |
76 | #endif |
77 | ||
de5bf5d3 | 78 | #include "systime.h" |
570d7624 JB |
79 | |
80 | #ifdef HPUX | |
81 | #include <netio.h> | |
47e7b9e5 | 82 | #endif |
570d7624 | 83 | |
9c856db9 | 84 | #include "commands.h" |
9c856db9 | 85 | |
c1558952 TTN |
86 | #ifndef FILE_SYSTEM_CASE |
87 | #define FILE_SYSTEM_CASE(filename) (filename) | |
88 | #endif | |
89 | ||
570d7624 | 90 | /* Nonzero during writing of auto-save files */ |
5045092b | 91 | static int auto_saving; |
570d7624 JB |
92 | |
93 | /* Set by auto_save_1 to mode of original file so Fwrite_region will create | |
94 | a new file with the same mode as the original */ | |
5045092b | 95 | static int auto_save_mode_bits; |
570d7624 | 96 | |
ca730bf0 | 97 | /* Set by auto_save_1 if an error occurred during the last auto-save. */ |
5045092b | 98 | static int auto_save_error_occurred; |
ca730bf0 | 99 | |
356a6224 KH |
100 | /* The symbol bound to coding-system-for-read when |
101 | insert-file-contents is called for recovering a file. This is not | |
102 | an actual coding system name, but just an indicator to tell | |
103 | insert-file-contents to use `emacs-mule' with a special flag for | |
104 | auto saving and recovering a file. */ | |
955cbe7b | 105 | static Lisp_Object Qauto_save_coding; |
356a6224 | 106 | |
f6c9b683 RS |
107 | /* Property name of a file name handler, |
108 | which gives a list of operations it handles.. */ | |
955cbe7b | 109 | static Lisp_Object Qoperations; |
f6c9b683 | 110 | |
0d420e88 | 111 | /* Lisp functions for translating file formats */ |
955cbe7b | 112 | static Lisp_Object Qformat_decode, Qformat_annotate_function; |
0d420e88 | 113 | |
2080470e | 114 | /* Lisp function for setting buffer-file-coding-system and the |
b6426b03 | 115 | multibyteness of the current buffer after inserting a file. */ |
955cbe7b | 116 | static Lisp_Object Qafter_insert_file_set_coding; |
b6426b03 | 117 | |
955cbe7b | 118 | static Lisp_Object Qwrite_region_annotate_functions; |
67fbc0cb CY |
119 | /* Each time an annotation function changes the buffer, the new buffer |
120 | is added here. */ | |
5045092b | 121 | static Lisp_Object Vwrite_region_annotation_buffers; |
67fbc0cb | 122 | |
ccf61795 | 123 | #ifdef HAVE_FSYNC |
ccf61795 RF |
124 | #endif |
125 | ||
955cbe7b | 126 | static Lisp_Object Qdelete_by_moving_to_trash; |
d2b66acf | 127 | |
6cf29fe8 | 128 | /* Lisp function for moving files to trash. */ |
955cbe7b | 129 | static Lisp_Object Qmove_file_to_trash; |
6cf29fe8 | 130 | |
8719abec | 131 | /* Lisp function for recursively copying directories. */ |
955cbe7b | 132 | static Lisp_Object Qcopy_directory; |
8719abec CY |
133 | |
134 | /* Lisp function for recursively deleting directories. */ | |
955cbe7b | 135 | static Lisp_Object Qdelete_directory; |
8719abec | 136 | |
c1c4693e | 137 | #ifdef WINDOWSNT |
c1c4693e RS |
138 | #endif |
139 | ||
955cbe7b PE |
140 | Lisp_Object Qfile_error; |
141 | static Lisp_Object Qfile_already_exists, Qfile_date_error; | |
142 | static Lisp_Object Qexcl; | |
15c65264 RS |
143 | Lisp_Object Qfile_name_history; |
144 | ||
955cbe7b | 145 | static Lisp_Object Qcar_less_than_car; |
d6a3cc15 | 146 | |
cd64ea1d | 147 | static Lisp_Object Fmake_symbolic_link (Lisp_Object, Lisp_Object, Lisp_Object); |
8a2cbd72 | 148 | static int a_write (int, Lisp_Object, EMACS_INT, EMACS_INT, |
f57e2426 | 149 | Lisp_Object *, struct coding_system *); |
8bd7b830 | 150 | static int e_write (int, Lisp_Object, EMACS_INT, EMACS_INT, |
8a2cbd72 | 151 | struct coding_system *); |
ce51c54c | 152 | |
ec7adf26 | 153 | \f |
5d01d666 | 154 | void |
971de7fb | 155 | report_file_error (const char *string, Lisp_Object data) |
570d7624 JB |
156 | { |
157 | Lisp_Object errstring; | |
505ab9bc | 158 | int errorno = errno; |
d7259fdb | 159 | char *str; |
570d7624 | 160 | |
ca9c0567 | 161 | synchronize_system_messages_locale (); |
d7259fdb KH |
162 | str = strerror (errorno); |
163 | errstring = code_convert_string_norecord (make_unibyte_string (str, | |
164 | strlen (str)), | |
68c45bf0 PE |
165 | Vlocale_coding_system, 0); |
166 | ||
570d7624 | 167 | while (1) |
505ab9bc RS |
168 | switch (errorno) |
169 | { | |
170 | case EEXIST: | |
24b1ddad | 171 | xsignal (Qfile_already_exists, Fcons (errstring, data)); |
505ab9bc RS |
172 | break; |
173 | default: | |
174 | /* System error messages are capitalized. Downcase the initial | |
39824137 EZ |
175 | unless it is followed by a slash. (The slash case caters to |
176 | error messages that begin with "I/O" or, in German, "E/A".) */ | |
d5443ffd KH |
177 | if (STRING_MULTIBYTE (errstring) |
178 | && ! EQ (Faref (errstring, make_number (1)), make_number ('/'))) | |
6c0969ca KH |
179 | { |
180 | int c; | |
181 | ||
51b59d79 | 182 | str = SSDATA (errstring); |
5976c3fe | 183 | c = STRING_CHAR ((unsigned char *) str); |
5da9919f | 184 | Faset (errstring, make_number (0), make_number (downcase (c))); |
6c0969ca | 185 | } |
505ab9bc | 186 | |
24b1ddad | 187 | xsignal (Qfile_error, |
505ab9bc RS |
188 | Fcons (build_string (string), Fcons (errstring, data))); |
189 | } | |
570d7624 | 190 | } |
b5148e85 | 191 | |
b27a1703 | 192 | Lisp_Object |
971de7fb | 193 | close_file_unwind (Lisp_Object fd) |
b5148e85 | 194 | { |
68c45bf0 | 195 | emacs_close (XFASTINT (fd)); |
b27a1703 | 196 | return Qnil; |
b5148e85 | 197 | } |
a1d2b64a RS |
198 | |
199 | /* Restore point, having saved it as a marker. */ | |
200 | ||
5dcde606 | 201 | Lisp_Object |
971de7fb | 202 | restore_point_unwind (Lisp_Object location) |
a1d2b64a | 203 | { |
ec7adf26 | 204 | Fgoto_char (location); |
a1d2b64a | 205 | Fset_marker (location, Qnil, Qnil); |
b27a1703 | 206 | return Qnil; |
a1d2b64a | 207 | } |
59c94f03 | 208 | |
570d7624 | 209 | \f |
955cbe7b PE |
210 | static Lisp_Object Qexpand_file_name; |
211 | static Lisp_Object Qsubstitute_in_file_name; | |
212 | static Lisp_Object Qdirectory_file_name; | |
213 | static Lisp_Object Qfile_name_directory; | |
214 | static Lisp_Object Qfile_name_nondirectory; | |
215 | static Lisp_Object Qunhandled_file_name_directory; | |
216 | static Lisp_Object Qfile_name_as_directory; | |
217 | static Lisp_Object Qcopy_file; | |
218 | static Lisp_Object Qmake_directory_internal; | |
219 | static Lisp_Object Qmake_directory; | |
220 | static Lisp_Object Qdelete_directory_internal; | |
32f4334d | 221 | Lisp_Object Qdelete_file; |
955cbe7b PE |
222 | static Lisp_Object Qrename_file; |
223 | static Lisp_Object Qadd_name_to_file; | |
224 | static Lisp_Object Qmake_symbolic_link; | |
32f4334d | 225 | Lisp_Object Qfile_exists_p; |
955cbe7b PE |
226 | static Lisp_Object Qfile_executable_p; |
227 | static Lisp_Object Qfile_readable_p; | |
228 | static Lisp_Object Qfile_writable_p; | |
229 | static Lisp_Object Qfile_symlink_p; | |
230 | static Lisp_Object Qaccess_file; | |
32f4334d | 231 | Lisp_Object Qfile_directory_p; |
955cbe7b PE |
232 | static Lisp_Object Qfile_regular_p; |
233 | static Lisp_Object Qfile_accessible_directory_p; | |
234 | static Lisp_Object Qfile_modes; | |
235 | static Lisp_Object Qset_file_modes; | |
236 | static Lisp_Object Qset_file_times; | |
237 | static Lisp_Object Qfile_selinux_context; | |
238 | static Lisp_Object Qset_file_selinux_context; | |
239 | static Lisp_Object Qfile_newer_than_file_p; | |
32f4334d RS |
240 | Lisp_Object Qinsert_file_contents; |
241 | Lisp_Object Qwrite_region; | |
955cbe7b PE |
242 | static Lisp_Object Qverify_visited_file_modtime; |
243 | static Lisp_Object Qset_visited_file_modtime; | |
32f4334d | 244 | |
a7ca3326 | 245 | DEFUN ("find-file-name-handler", Ffind_file_name_handler, |
16a97296 | 246 | Sfind_file_name_handler, 2, 2, 0, |
8c1a1077 PJ |
247 | doc: /* Return FILENAME's handler function for OPERATION, if it has one. |
248 | Otherwise, return nil. | |
249 | A file name is handled if one of the regular expressions in | |
250 | `file-name-handler-alist' matches it. | |
251 | ||
252 | If OPERATION equals `inhibit-file-name-operation', then we ignore | |
253 | any handlers that are members of `inhibit-file-name-handlers', | |
254 | but we still do run any other handlers. This lets handlers | |
255 | use the standard functions without calling themselves recursively. */) | |
5842a27b | 256 | (Lisp_Object filename, Lisp_Object operation) |
32f4334d | 257 | { |
642ef245 | 258 | /* This function must not munge the match data. */ |
204ee271 | 259 | Lisp_Object chain, inhibited_handlers, result; |
8d2ced53 | 260 | int pos = -1; |
642ef245 | 261 | |
204ee271 | 262 | result = Qnil; |
b7826503 | 263 | CHECK_STRING (filename); |
e4432095 | 264 | |
a65970a0 RS |
265 | if (EQ (operation, Vinhibit_file_name_operation)) |
266 | inhibited_handlers = Vinhibit_file_name_handlers; | |
267 | else | |
268 | inhibited_handlers = Qnil; | |
82c2d839 | 269 | |
93c30b5f | 270 | for (chain = Vfile_name_handler_alist; CONSP (chain); |
03699b14 | 271 | chain = XCDR (chain)) |
32f4334d RS |
272 | { |
273 | Lisp_Object elt; | |
03699b14 | 274 | elt = XCAR (chain); |
93c30b5f | 275 | if (CONSP (elt)) |
32f4334d | 276 | { |
f6c9b683 | 277 | Lisp_Object string = XCAR (elt); |
a53e2e89 | 278 | EMACS_INT match_pos; |
f6c9b683 | 279 | Lisp_Object handler = XCDR (elt); |
68780e2a RS |
280 | Lisp_Object operations = Qnil; |
281 | ||
282 | if (SYMBOLP (handler)) | |
283 | operations = Fget (handler, Qoperations); | |
f6c9b683 | 284 | |
8d2ced53 | 285 | if (STRINGP (string) |
f6c9b683 RS |
286 | && (match_pos = fast_string_match (string, filename)) > pos |
287 | && (NILP (operations) || ! NILP (Fmemq (operation, operations)))) | |
a65970a0 | 288 | { |
f6c9b683 | 289 | Lisp_Object tem; |
a65970a0 | 290 | |
03699b14 | 291 | handler = XCDR (elt); |
a65970a0 RS |
292 | tem = Fmemq (handler, inhibited_handlers); |
293 | if (NILP (tem)) | |
8d2ced53 SM |
294 | { |
295 | result = handler; | |
296 | pos = match_pos; | |
297 | } | |
a65970a0 | 298 | } |
32f4334d | 299 | } |
642ef245 JB |
300 | |
301 | QUIT; | |
32f4334d | 302 | } |
8d2ced53 | 303 | return result; |
32f4334d RS |
304 | } |
305 | \f | |
a7ca3326 | 306 | DEFUN ("file-name-directory", Ffile_name_directory, Sfile_name_directory, |
8c1a1077 PJ |
307 | 1, 1, 0, |
308 | doc: /* Return the directory component in file name FILENAME. | |
309 | Return nil if FILENAME does not include a directory. | |
78379264 | 310 | Otherwise return a directory name. |
7c2fb837 | 311 | Given a Unix syntax file name, returns a string ending in slash. */) |
5842a27b | 312 | (Lisp_Object filename) |
570d7624 | 313 | { |
100c44b7 | 314 | #ifndef DOS_NT |
5976c3fe | 315 | register const char *beg; |
100c44b7 | 316 | #else |
5976c3fe | 317 | register char *beg; |
100c44b7 | 318 | #endif |
5976c3fe | 319 | register const char *p; |
0bf2eed2 | 320 | Lisp_Object handler; |
570d7624 | 321 | |
b7826503 | 322 | CHECK_STRING (filename); |
570d7624 | 323 | |
0bf2eed2 RS |
324 | /* If the file name has special constructs in it, |
325 | call the corresponding file handler. */ | |
3b7f6e60 | 326 | handler = Ffind_file_name_handler (filename, Qfile_name_directory); |
0bf2eed2 | 327 | if (!NILP (handler)) |
3b7f6e60 | 328 | return call2 (handler, Qfile_name_directory, filename); |
0bf2eed2 | 329 | |
3b7f6e60 | 330 | filename = FILE_SYSTEM_CASE (filename); |
199607e4 | 331 | #ifdef DOS_NT |
5976c3fe PE |
332 | beg = (char *) alloca (SBYTES (filename) + 1); |
333 | memcpy (beg, SSDATA (filename), SBYTES (filename) + 1); | |
0f3f018c | 334 | #else |
5976c3fe | 335 | beg = SSDATA (filename); |
199607e4 | 336 | #endif |
d5db4077 | 337 | p = beg + SBYTES (filename); |
570d7624 | 338 | |
199607e4 | 339 | while (p != beg && !IS_DIRECTORY_SEP (p[-1]) |
199607e4 | 340 | #ifdef DOS_NT |
ba14e174 RS |
341 | /* only recognise drive specifier at the beginning */ |
342 | && !(p[-1] == ':' | |
343 | /* handle the "/:d:foo" and "/:foo" cases correctly */ | |
344 | && ((p == beg + 2 && !IS_DIRECTORY_SEP (*beg)) | |
345 | || (p == beg + 4 && IS_DIRECTORY_SEP (*beg)))) | |
199607e4 | 346 | #endif |
570d7624 JB |
347 | ) p--; |
348 | ||
349 | if (p == beg) | |
350 | return Qnil; | |
5e570b75 | 351 | #ifdef DOS_NT |
4c3c22f3 | 352 | /* Expansion of "c:" to drive and default directory. */ |
ba14e174 | 353 | if (p[-1] == ':') |
4c3c22f3 | 354 | { |
4c3c22f3 | 355 | /* MAXPATHLEN+1 is guaranteed to be enough space for getdefdir. */ |
5976c3fe PE |
356 | char *res = alloca (MAXPATHLEN + 1); |
357 | char *r = res; | |
ba14e174 RS |
358 | |
359 | if (p == beg + 4 && IS_DIRECTORY_SEP (*beg) && beg[1] == ':') | |
360 | { | |
361 | strncpy (res, beg, 2); | |
362 | beg += 2; | |
363 | r += 2; | |
364 | } | |
365 | ||
5976c3fe | 366 | if (getdefdir (toupper ((unsigned char) *beg) - 'A' + 1, r)) |
4c3c22f3 | 367 | { |
199607e4 | 368 | if (!IS_DIRECTORY_SEP (res[strlen (res) - 1])) |
4c3c22f3 RS |
369 | strcat (res, "/"); |
370 | beg = res; | |
371 | p = beg + strlen (beg); | |
372 | } | |
373 | } | |
087fc47a | 374 | dostounix_filename (beg); |
5e570b75 | 375 | #endif /* DOS_NT */ |
60d67b83 | 376 | |
d7231f93 | 377 | return make_specified_string (beg, -1, p - beg, STRING_MULTIBYTE (filename)); |
570d7624 JB |
378 | } |
379 | ||
a7ca3326 | 380 | DEFUN ("file-name-nondirectory", Ffile_name_nondirectory, |
60d67b83 | 381 | Sfile_name_nondirectory, 1, 1, 0, |
8c1a1077 PJ |
382 | doc: /* Return file name FILENAME sans its directory. |
383 | For example, in a Unix-syntax file name, | |
384 | this is everything after the last slash, | |
385 | or the entire name if it contains no slash. */) | |
5842a27b | 386 | (Lisp_Object filename) |
570d7624 | 387 | { |
5976c3fe | 388 | register const char *beg, *p, *end; |
0bf2eed2 | 389 | Lisp_Object handler; |
570d7624 | 390 | |
b7826503 | 391 | CHECK_STRING (filename); |
570d7624 | 392 | |
0bf2eed2 RS |
393 | /* If the file name has special constructs in it, |
394 | call the corresponding file handler. */ | |
3b7f6e60 | 395 | handler = Ffind_file_name_handler (filename, Qfile_name_nondirectory); |
0bf2eed2 | 396 | if (!NILP (handler)) |
3b7f6e60 | 397 | return call2 (handler, Qfile_name_nondirectory, filename); |
0bf2eed2 | 398 | |
5976c3fe | 399 | beg = SSDATA (filename); |
d5db4077 | 400 | end = p = beg + SBYTES (filename); |
570d7624 | 401 | |
199607e4 | 402 | while (p != beg && !IS_DIRECTORY_SEP (p[-1]) |
199607e4 RS |
403 | #ifdef DOS_NT |
404 | /* only recognise drive specifier at beginning */ | |
ba14e174 RS |
405 | && !(p[-1] == ':' |
406 | /* handle the "/:d:foo" case correctly */ | |
407 | && (p == beg + 2 || (p == beg + 4 && IS_DIRECTORY_SEP (*beg)))) | |
199607e4 | 408 | #endif |
60d67b83 RS |
409 | ) |
410 | p--; | |
570d7624 | 411 | |
d7231f93 | 412 | return make_specified_string (p, -1, end - p, STRING_MULTIBYTE (filename)); |
570d7624 | 413 | } |
642ef245 | 414 | |
a7ca3326 | 415 | DEFUN ("unhandled-file-name-directory", Funhandled_file_name_directory, |
60d67b83 | 416 | Sunhandled_file_name_directory, 1, 1, 0, |
8c1a1077 PJ |
417 | doc: /* Return a directly usable directory name somehow associated with FILENAME. |
418 | A `directly usable' directory name is one that may be used without the | |
419 | intervention of any file handler. | |
420 | If FILENAME is a directly usable file itself, return | |
421 | \(file-name-directory FILENAME). | |
ca319910 SM |
422 | If FILENAME refers to a file which is not accessible from a local process, |
423 | then this should return nil. | |
8c1a1077 PJ |
424 | The `call-process' and `start-process' functions use this function to |
425 | get a current directory to run processes in. */) | |
5842a27b | 426 | (Lisp_Object filename) |
642ef245 JB |
427 | { |
428 | Lisp_Object handler; | |
429 | ||
430 | /* If the file name has special constructs in it, | |
431 | call the corresponding file handler. */ | |
49307295 | 432 | handler = Ffind_file_name_handler (filename, Qunhandled_file_name_directory); |
642ef245 JB |
433 | if (!NILP (handler)) |
434 | return call2 (handler, Qunhandled_file_name_directory, filename); | |
435 | ||
436 | return Ffile_name_directory (filename); | |
437 | } | |
438 | ||
570d7624 | 439 | \f |
f14b7e14 | 440 | static char * |
2893f146 | 441 | file_name_as_directory (char *out, const char *in) |
570d7624 | 442 | { |
93f4cf88 | 443 | ptrdiff_t len = strlen (in); |
570d7624 | 444 | |
93f4cf88 | 445 | if (len == 0) |
8aa3a244 | 446 | { |
154a307d KH |
447 | out[0] = '.'; |
448 | out[1] = '/'; | |
449 | out[2] = 0; | |
8aa3a244 RS |
450 | return out; |
451 | } | |
452 | ||
93f4cf88 PE |
453 | strcpy (out, in); |
454 | ||
570d7624 | 455 | /* For Unix syntax, Append a slash if necessary */ |
93f4cf88 | 456 | if (!IS_DIRECTORY_SEP (out[len - 1])) |
5e570b75 | 457 | { |
93f4cf88 PE |
458 | out[len] = DIRECTORY_SEP; |
459 | out[len + 1] = '\0'; | |
5e570b75 | 460 | } |
199607e4 | 461 | #ifdef DOS_NT |
087fc47a | 462 | dostounix_filename (out); |
199607e4 | 463 | #endif |
570d7624 JB |
464 | return out; |
465 | } | |
466 | ||
a7ca3326 | 467 | DEFUN ("file-name-as-directory", Ffile_name_as_directory, |
570d7624 | 468 | Sfile_name_as_directory, 1, 1, 0, |
0dac4f85 | 469 | doc: /* Return a string representing the file name FILE interpreted as a directory. |
8c1a1077 PJ |
470 | This operation exists because a directory is also a file, but its name as |
471 | a directory is different from its name as a file. | |
472 | The result can be used as the value of `default-directory' | |
473 | or passed as second argument to `expand-file-name'. | |
7c2fb837 | 474 | For a Unix-syntax file name, just appends a slash. */) |
5842a27b | 475 | (Lisp_Object file) |
570d7624 JB |
476 | { |
477 | char *buf; | |
0bf2eed2 | 478 | Lisp_Object handler; |
570d7624 | 479 | |
b7826503 | 480 | CHECK_STRING (file); |
265a9e55 | 481 | if (NILP (file)) |
570d7624 | 482 | return Qnil; |
0bf2eed2 RS |
483 | |
484 | /* If the file name has special constructs in it, | |
485 | call the corresponding file handler. */ | |
49307295 | 486 | handler = Ffind_file_name_handler (file, Qfile_name_as_directory); |
0bf2eed2 RS |
487 | if (!NILP (handler)) |
488 | return call2 (handler, Qfile_name_as_directory, file); | |
489 | ||
d5db4077 | 490 | buf = (char *) alloca (SBYTES (file) + 10); |
42a5b22f | 491 | file_name_as_directory (buf, SSDATA (file)); |
d7231f93 KH |
492 | return make_specified_string (buf, -1, strlen (buf), |
493 | STRING_MULTIBYTE (file)); | |
570d7624 JB |
494 | } |
495 | \f | |
496 | /* | |
497 | * Convert from directory name to filename. | |
199607e4 | 498 | * On UNIX, it's simple: just make sure there isn't a terminating / |
570d7624 JB |
499 | |
500 | * Value is nonzero if the string output is different from the input. | |
501 | */ | |
502 | ||
f14b7e14 | 503 | static int |
971de7fb | 504 | directory_file_name (char *src, char *dst) |
570d7624 | 505 | { |
93f4cf88 | 506 | ptrdiff_t slen; |
570d7624 JB |
507 | |
508 | slen = strlen (src); | |
7c2fb837 | 509 | |
570d7624 JB |
510 | /* Process as Unix format: just remove any final slash. |
511 | But leave "/" unchanged; do not change it to "". */ | |
512 | strcpy (dst, src); | |
199607e4 | 513 | if (slen > 1 |
5e570b75 | 514 | && IS_DIRECTORY_SEP (dst[slen - 1]) |
4592782e RS |
515 | #ifdef DOS_NT |
516 | && !IS_ANY_SEP (dst[slen - 2]) | |
517 | #endif | |
518 | ) | |
570d7624 | 519 | dst[slen - 1] = 0; |
199607e4 | 520 | #ifdef DOS_NT |
087fc47a | 521 | dostounix_filename (dst); |
125feee8 | 522 | #endif |
570d7624 JB |
523 | return 1; |
524 | } | |
525 | ||
a7ca3326 | 526 | DEFUN ("directory-file-name", Fdirectory_file_name, Sdirectory_file_name, |
8c1a1077 PJ |
527 | 1, 1, 0, |
528 | doc: /* Returns the file name of the directory named DIRECTORY. | |
529 | This is the name of the file that holds the data for the directory DIRECTORY. | |
530 | This operation exists because a directory is also a file, but its name as | |
531 | a directory is different from its name as a file. | |
7c2fb837 | 532 | In Unix-syntax, this function just removes the final slash. */) |
5842a27b | 533 | (Lisp_Object directory) |
570d7624 JB |
534 | { |
535 | char *buf; | |
0bf2eed2 | 536 | Lisp_Object handler; |
570d7624 | 537 | |
b7826503 | 538 | CHECK_STRING (directory); |
570d7624 | 539 | |
265a9e55 | 540 | if (NILP (directory)) |
570d7624 | 541 | return Qnil; |
0bf2eed2 RS |
542 | |
543 | /* If the file name has special constructs in it, | |
544 | call the corresponding file handler. */ | |
49307295 | 545 | handler = Ffind_file_name_handler (directory, Qdirectory_file_name); |
0bf2eed2 RS |
546 | if (!NILP (handler)) |
547 | return call2 (handler, Qdirectory_file_name, directory); | |
548 | ||
d5db4077 | 549 | buf = (char *) alloca (SBYTES (directory) + 20); |
42a5b22f | 550 | directory_file_name (SSDATA (directory), buf); |
d7231f93 KH |
551 | return make_specified_string (buf, -1, strlen (buf), |
552 | STRING_MULTIBYTE (directory)); | |
570d7624 JB |
553 | } |
554 | ||
91433552 | 555 | static const char make_temp_name_tbl[64] = |
3ce839e4 RS |
556 | { |
557 | 'A','B','C','D','E','F','G','H', | |
558 | 'I','J','K','L','M','N','O','P', | |
559 | 'Q','R','S','T','U','V','W','X', | |
560 | 'Y','Z','a','b','c','d','e','f', | |
561 | 'g','h','i','j','k','l','m','n', | |
562 | 'o','p','q','r','s','t','u','v', | |
563 | 'w','x','y','z','0','1','2','3', | |
564 | '4','5','6','7','8','9','-','_' | |
565 | }; | |
cb613bb8 | 566 | |
3ce839e4 RS |
567 | static unsigned make_temp_name_count, make_temp_name_count_initialized_p; |
568 | ||
cb613bb8 | 569 | /* Value is a temporary file name starting with PREFIX, a string. |
efdc16c9 | 570 | |
cb613bb8 GM |
571 | The Emacs process number forms part of the result, so there is |
572 | no danger of generating a name being used by another process. | |
573 | In addition, this function makes an attempt to choose a name | |
574 | which has no existing file. To make this work, PREFIX should be | |
575 | an absolute file name. | |
efdc16c9 | 576 | |
cb613bb8 GM |
577 | BASE64_P non-zero means add the pid as 3 characters in base64 |
578 | encoding. In this case, 6 characters will be added to PREFIX to | |
579 | form the file name. Otherwise, if Emacs is running on a system | |
580 | with long file names, add the pid as a decimal number. | |
581 | ||
582 | This function signals an error if no unique file name could be | |
583 | generated. */ | |
584 | ||
585 | Lisp_Object | |
971de7fb | 586 | make_temp_name (Lisp_Object prefix, int base64_p) |
570d7624 JB |
587 | { |
588 | Lisp_Object val; | |
0cedd530 | 589 | int len, clen; |
93f4cf88 | 590 | intmax_t pid; |
5976c3fe | 591 | char *p, *data; |
93f4cf88 | 592 | char pidbuf[INT_BUFSIZE_BOUND (pid_t)]; |
3ce839e4 | 593 | int pidlen; |
efdc16c9 | 594 | |
b7826503 | 595 | CHECK_STRING (prefix); |
3ce839e4 RS |
596 | |
597 | /* VAL is created by adding 6 characters to PREFIX. The first | |
598 | three are the PID of this process, in base 64, and the second | |
599 | three are incremented if the file already exists. This ensures | |
600 | 262144 unique file names per PID per PREFIX. */ | |
601 | ||
93f4cf88 | 602 | pid = getpid (); |
3ce839e4 | 603 | |
cb613bb8 GM |
604 | if (base64_p) |
605 | { | |
606 | pidbuf[0] = make_temp_name_tbl[pid & 63], pid >>= 6; | |
607 | pidbuf[1] = make_temp_name_tbl[pid & 63], pid >>= 6; | |
608 | pidbuf[2] = make_temp_name_tbl[pid & 63], pid >>= 6; | |
609 | pidlen = 3; | |
610 | } | |
611 | else | |
612 | { | |
3ce839e4 | 613 | #ifdef HAVE_LONG_FILE_NAMES |
93f4cf88 | 614 | pidlen = sprintf (pidbuf, "%"PRIdMAX, pid); |
3a3bfb18 | 615 | #else |
cb613bb8 GM |
616 | pidbuf[0] = make_temp_name_tbl[pid & 63], pid >>= 6; |
617 | pidbuf[1] = make_temp_name_tbl[pid & 63], pid >>= 6; | |
618 | pidbuf[2] = make_temp_name_tbl[pid & 63], pid >>= 6; | |
619 | pidlen = 3; | |
3ce839e4 | 620 | #endif |
cb613bb8 | 621 | } |
efdc16c9 | 622 | |
0cedd530 SM |
623 | len = SBYTES (prefix); clen = SCHARS (prefix); |
624 | val = make_uninit_multibyte_string (clen + 3 + pidlen, len + 3 + pidlen); | |
625 | if (!STRING_MULTIBYTE (prefix)) | |
626 | STRING_SET_UNIBYTE (val); | |
5976c3fe PE |
627 | data = SSDATA (val); |
628 | memcpy (data, SSDATA (prefix), len); | |
3ce839e4 RS |
629 | p = data + len; |
630 | ||
72af86bd | 631 | memcpy (p, pidbuf, pidlen); |
3ce839e4 RS |
632 | p += pidlen; |
633 | ||
634 | /* Here we try to minimize useless stat'ing when this function is | |
635 | invoked many times successively with the same PREFIX. We achieve | |
636 | this by initializing count to a random value, and incrementing it | |
f6a492a9 RS |
637 | afterwards. |
638 | ||
639 | We don't want make-temp-name to be called while dumping, | |
640 | because then make_temp_name_count_initialized_p would get set | |
641 | and then make_temp_name_count would not be set when Emacs starts. */ | |
642 | ||
3ce839e4 RS |
643 | if (!make_temp_name_count_initialized_p) |
644 | { | |
327eeec8 | 645 | make_temp_name_count = time (NULL); |
3ce839e4 RS |
646 | make_temp_name_count_initialized_p = 1; |
647 | } | |
648 | ||
649 | while (1) | |
650 | { | |
651 | struct stat ignored; | |
8a7777fc | 652 | unsigned num = make_temp_name_count; |
3ce839e4 RS |
653 | |
654 | p[0] = make_temp_name_tbl[num & 63], num >>= 6; | |
655 | p[1] = make_temp_name_tbl[num & 63], num >>= 6; | |
656 | p[2] = make_temp_name_tbl[num & 63], num >>= 6; | |
657 | ||
8a7777fc RS |
658 | /* Poor man's congruential RN generator. Replace with |
659 | ++make_temp_name_count for debugging. */ | |
660 | make_temp_name_count += 25229; | |
661 | make_temp_name_count %= 225307; | |
662 | ||
3ce839e4 RS |
663 | if (stat (data, &ignored) < 0) |
664 | { | |
665 | /* We want to return only if errno is ENOENT. */ | |
666 | if (errno == ENOENT) | |
667 | return val; | |
668 | else | |
669 | /* The error here is dubious, but there is little else we | |
670 | can do. The alternatives are to return nil, which is | |
671 | as bad as (and in many cases worse than) throwing the | |
672 | error, or to ignore the error, which will likely result | |
8a7777fc | 673 | in looping through 225307 stat's, which is not only |
410ed5c3 PE |
674 | dog-slow, but also useless since eventually nil would |
675 | have to be returned anyway. */ | |
9869bb0b | 676 | report_file_error ("Cannot create temporary name for prefix", |
3ce839e4 RS |
677 | Fcons (prefix, Qnil)); |
678 | /* not reached */ | |
679 | } | |
680 | } | |
570d7624 | 681 | } |
3ce839e4 | 682 | |
cb613bb8 GM |
683 | |
684 | DEFUN ("make-temp-name", Fmake_temp_name, Smake_temp_name, 1, 1, 0, | |
8c1a1077 PJ |
685 | doc: /* Generate temporary file name (string) starting with PREFIX (a string). |
686 | The Emacs process number forms part of the result, | |
687 | so there is no danger of generating a name being used by another process. | |
688 | ||
689 | In addition, this function makes an attempt to choose a name | |
690 | which has no existing file. To make this work, | |
691 | PREFIX should be an absolute file name. | |
692 | ||
693 | There is a race condition between calling `make-temp-name' and creating the | |
694 | file which opens all kinds of security holes. For that reason, you should | |
f9e6f049 RS |
695 | probably use `make-temp-file' instead, except in three circumstances: |
696 | ||
697 | * If you are creating the file in the user's home directory. | |
698 | * If you are creating a directory rather than an ordinary file. | |
699 | * If you are taking special precautions as `make-temp-file' does. */) | |
5842a27b | 700 | (Lisp_Object prefix) |
cb613bb8 GM |
701 | { |
702 | return make_temp_name (prefix, 0); | |
703 | } | |
704 | ||
705 | ||
570d7624 | 706 | \f |
a7ca3326 | 707 | DEFUN ("expand-file-name", Fexpand_file_name, Sexpand_file_name, 1, 2, 0, |
8c1a1077 PJ |
708 | doc: /* Convert filename NAME to absolute, and canonicalize it. |
709 | Second arg DEFAULT-DIRECTORY is directory to start with if NAME is relative | |
78379264 | 710 | \(does not start with slash or tilde); if DEFAULT-DIRECTORY is nil or missing, |
a4e03fe5 | 711 | the current buffer's value of `default-directory' is used. |
1b2a627f EZ |
712 | NAME should be a string that is a valid file name for the underlying |
713 | filesystem. | |
8c1a1077 PJ |
714 | File name components that are `.' are removed, and |
715 | so are file name components followed by `..', along with the `..' itself; | |
716 | note that these simplifications are done without checking the resulting | |
717 | file names in the file system. | |
15579471 EZ |
718 | Multiple consecutive slashes are collapsed into a single slash, |
719 | except at the beginning of the file name when they are significant (e.g., | |
720 | UNC file names on MS-Windows.) | |
8c1a1077 PJ |
721 | An initial `~/' expands to your home directory. |
722 | An initial `~USER/' expands to USER's home directory. | |
07114296 CY |
723 | See also the function `substitute-in-file-name'. |
724 | ||
725 | For technical reasons, this function can return correct but | |
726 | non-intuitive results for the root directory; for instance, | |
727 | \(expand-file-name ".." "/") returns "/..". For this reason, use | |
15579471 | 728 | \(directory-file-name (file-name-directory dirname)) to traverse a |
07114296 | 729 | filesystem tree, not (expand-file-name ".." dirname). */) |
5842a27b | 730 | (Lisp_Object name, Lisp_Object default_directory) |
570d7624 | 731 | { |
5b5a2ea1 SM |
732 | /* These point to SDATA and need to be careful with string-relocation |
733 | during GC (via DECODE_FILE). */ | |
2893f146 PE |
734 | char *nm; |
735 | const char *newdir; | |
5b5a2ea1 | 736 | /* This should only point to alloca'd data. */ |
5976c3fe | 737 | char *target; |
199607e4 | 738 | |
93f4cf88 | 739 | ptrdiff_t tlen; |
570d7624 | 740 | struct passwd *pw; |
5e570b75 | 741 | #ifdef DOS_NT |
199607e4 | 742 | int drive = 0; |
9a1dc3be | 743 | int collapse_newdir = 1; |
f0f95d31 | 744 | int is_escaped = 0; |
5e570b75 | 745 | #endif /* DOS_NT */ |
93f4cf88 | 746 | ptrdiff_t length; |
beb402de | 747 | Lisp_Object handler, result; |
2b046a72 | 748 | int multibyte; |
9c06a1f3 | 749 | Lisp_Object hdir; |
199607e4 | 750 | |
b7826503 | 751 | CHECK_STRING (name); |
570d7624 | 752 | |
0bf2eed2 RS |
753 | /* If the file name has special constructs in it, |
754 | call the corresponding file handler. */ | |
49307295 | 755 | handler = Ffind_file_name_handler (name, Qexpand_file_name); |
0bf2eed2 | 756 | if (!NILP (handler)) |
3b7f6e60 | 757 | return call3 (handler, Qexpand_file_name, name, default_directory); |
58fc9587 | 758 | |
3b7f6e60 EN |
759 | /* Use the buffer's default-directory if DEFAULT_DIRECTORY is omitted. */ |
760 | if (NILP (default_directory)) | |
4b4deea2 | 761 | default_directory = BVAR (current_buffer, directory); |
82330e7f | 762 | if (! STRINGP (default_directory)) |
dd693537 EZ |
763 | { |
764 | #ifdef DOS_NT | |
765 | /* "/" is not considered a root directory on DOS_NT, so using "/" | |
766 | here causes an infinite recursion in, e.g., the following: | |
767 | ||
768 | (let (default-directory) | |
769 | (expand-file-name "a")) | |
770 | ||
771 | To avoid this, we set default_directory to the root of the | |
772 | current drive. */ | |
dd693537 EZ |
773 | default_directory = build_string (emacs_root_dir ()); |
774 | #else | |
775 | default_directory = build_string ("/"); | |
776 | #endif | |
777 | } | |
58fc9587 | 778 | |
3b7f6e60 | 779 | if (!NILP (default_directory)) |
273e0829 | 780 | { |
3b7f6e60 | 781 | handler = Ffind_file_name_handler (default_directory, Qexpand_file_name); |
273e0829 | 782 | if (!NILP (handler)) |
3b7f6e60 | 783 | return call3 (handler, Qexpand_file_name, name, default_directory); |
273e0829 | 784 | } |
0bf2eed2 | 785 | |
5b5a2ea1 | 786 | { |
5976c3fe | 787 | char *o = SSDATA (default_directory); |
5b5a2ea1 SM |
788 | |
789 | /* Make sure DEFAULT_DIRECTORY is properly expanded. | |
790 | It would be better to do this down below where we actually use | |
791 | default_directory. Unfortunately, calling Fexpand_file_name recursively | |
792 | could invoke GC, and the strings might be relocated. This would | |
793 | be annoying because we have pointers into strings lying around | |
794 | that would need adjusting, and people would add new pointers to | |
795 | the code and forget to adjust them, resulting in intermittent bugs. | |
796 | Putting this call here avoids all that crud. | |
797 | ||
798 | The EQ test avoids infinite recursion. */ | |
799 | if (! NILP (default_directory) && !EQ (default_directory, name) | |
800 | /* Save time in some common cases - as long as default_directory | |
801 | is not relative, it can be canonicalized with name below (if it | |
802 | is needed at all) without requiring it to be expanded now. */ | |
01937013 | 803 | #ifdef DOS_NT |
5b5a2ea1 SM |
804 | /* Detect MSDOS file names with drive specifiers. */ |
805 | && ! (IS_DRIVE (o[0]) && IS_DEVICE_SEP (o[1]) | |
806 | && IS_DIRECTORY_SEP (o[2])) | |
199607e4 | 807 | #ifdef WINDOWSNT |
5b5a2ea1 SM |
808 | /* Detect Windows file names in UNC format. */ |
809 | && ! (IS_DIRECTORY_SEP (o[0]) && IS_DIRECTORY_SEP (o[1])) | |
01937013 | 810 | #endif |
199607e4 RS |
811 | #else /* not DOS_NT */ |
812 | /* Detect Unix absolute file names (/... alone is not absolute on | |
813 | DOS or Windows). */ | |
5b5a2ea1 | 814 | && ! (IS_DIRECTORY_SEP (o[0])) |
199607e4 | 815 | #endif /* not DOS_NT */ |
5b5a2ea1 SM |
816 | ) |
817 | { | |
818 | struct gcpro gcpro1; | |
f14b1c68 | 819 | |
5b5a2ea1 SM |
820 | GCPRO1 (name); |
821 | default_directory = Fexpand_file_name (default_directory, Qnil); | |
822 | UNGCPRO; | |
823 | } | |
824 | } | |
4c3c22f3 | 825 | name = FILE_SYSTEM_CASE (name); |
2b046a72 | 826 | multibyte = STRING_MULTIBYTE (name); |
6d060996 KH |
827 | if (multibyte != STRING_MULTIBYTE (default_directory)) |
828 | { | |
829 | if (multibyte) | |
830 | default_directory = string_to_multibyte (default_directory); | |
831 | else | |
832 | { | |
833 | name = string_to_multibyte (name); | |
834 | multibyte = 1; | |
835 | } | |
836 | } | |
837 | ||
565f0b98 | 838 | /* Make a local copy of nm[] to protect it from GC in DECODE_FILE below. */ |
5976c3fe PE |
839 | nm = (char *) alloca (SBYTES (name) + 1); |
840 | memcpy (nm, SSDATA (name), SBYTES (name) + 1); | |
199607e4 | 841 | |
565f0b98 | 842 | #ifdef DOS_NT |
f0f95d31 RS |
843 | /* Note if special escape prefix is present, but remove for now. */ |
844 | if (nm[0] == '/' && nm[1] == ':') | |
845 | { | |
846 | is_escaped = 1; | |
847 | nm += 2; | |
848 | } | |
849 | ||
199607e4 | 850 | /* Find and remove drive specifier if present; this makes nm absolute |
f0f95d31 RS |
851 | even if the rest of the name appears to be relative. Only look for |
852 | drive specifier at the beginning. */ | |
853 | if (IS_DRIVE (nm[0]) && IS_DEVICE_SEP (nm[1])) | |
854 | { | |
5976c3fe | 855 | drive = (unsigned char) nm[0]; |
f0f95d31 RS |
856 | nm += 2; |
857 | } | |
bb1ff1f4 GV |
858 | |
859 | #ifdef WINDOWSNT | |
860 | /* If we see "c://somedir", we want to strip the first slash after the | |
861 | colon when stripping the drive letter. Otherwise, this expands to | |
862 | "//somedir". */ | |
863 | if (drive && IS_DIRECTORY_SEP (nm[0]) && IS_DIRECTORY_SEP (nm[1])) | |
864 | nm++; | |
4c3c22f3 | 865 | |
199607e4 RS |
866 | /* Discard any previous drive specifier if nm is now in UNC format. */ |
867 | if (IS_DIRECTORY_SEP (nm[0]) && IS_DIRECTORY_SEP (nm[1])) | |
868 | { | |
869 | drive = 0; | |
870 | } | |
5b5a2ea1 SM |
871 | #endif /* WINDOWSNT */ |
872 | #endif /* DOS_NT */ | |
199607e4 | 873 | |
214378ec GM |
874 | /* If nm is absolute, look for `/./' or `/../' or `//''sequences; if |
875 | none are found, we can probably return right away. We will avoid | |
876 | allocating a new string if name is already fully expanded. */ | |
570d7624 | 877 | if ( |
5e570b75 | 878 | IS_DIRECTORY_SEP (nm[0]) |
199607e4 | 879 | #ifdef MSDOS |
f0f95d31 | 880 | && drive && !is_escaped |
199607e4 RS |
881 | #endif |
882 | #ifdef WINDOWSNT | |
f0f95d31 | 883 | && (drive || IS_DIRECTORY_SEP (nm[1])) && !is_escaped |
199607e4 | 884 | #endif |
570d7624 JB |
885 | ) |
886 | { | |
f14b1c68 JB |
887 | /* If it turns out that the filename we want to return is just a |
888 | suffix of FILENAME, we don't need to go through and edit | |
889 | things; we just need to construct a new string using data | |
890 | starting at the middle of FILENAME. If we set lose to a | |
891 | non-zero value, that means we've discovered that we can't do | |
892 | that cool trick. */ | |
893 | int lose = 0; | |
5976c3fe | 894 | char *p = nm; |
f14b1c68 | 895 | |
570d7624 JB |
896 | while (*p) |
897 | { | |
199607e4 | 898 | /* Since we know the name is absolute, we can assume that each |
c77d647e JB |
899 | element starts with a "/". */ |
900 | ||
c77d647e | 901 | /* "." and ".." are hairy. */ |
5e570b75 | 902 | if (IS_DIRECTORY_SEP (p[0]) |
c77d647e | 903 | && p[1] == '.' |
5e570b75 | 904 | && (IS_DIRECTORY_SEP (p[2]) |
c77d647e | 905 | || p[2] == 0 |
5e570b75 | 906 | || (p[2] == '.' && (IS_DIRECTORY_SEP (p[3]) |
c77d647e | 907 | || p[3] == 0)))) |
570d7624 | 908 | lose = 1; |
214378ec GM |
909 | /* We want to replace multiple `/' in a row with a single |
910 | slash. */ | |
911 | else if (p > nm | |
912 | && IS_DIRECTORY_SEP (p[0]) | |
913 | && IS_DIRECTORY_SEP (p[1])) | |
914 | lose = 1; | |
570d7624 JB |
915 | p++; |
916 | } | |
917 | if (!lose) | |
918 | { | |
199607e4 | 919 | #ifdef DOS_NT |
087fc47a JB |
920 | /* Make sure directories are all separated with /, but |
921 | avoid allocation of a new string when not required. */ | |
922 | dostounix_filename (nm); | |
199607e4 RS |
923 | #ifdef WINDOWSNT |
924 | if (IS_DIRECTORY_SEP (nm[1])) | |
925 | { | |
42a5b22f | 926 | if (strcmp (nm, SSDATA (name)) != 0) |
2b046a72 | 927 | name = make_specified_string (nm, -1, strlen (nm), multibyte); |
199607e4 RS |
928 | } |
929 | else | |
930 | #endif | |
931 | /* drive must be set, so this is okay */ | |
5976c3fe | 932 | if (strcmp (nm - 2, SSDATA (name)) != 0) |
199607e4 | 933 | { |
3f817c73 KH |
934 | char temp[] = " :"; |
935 | ||
2b046a72 | 936 | name = make_specified_string (nm, -1, p - nm, multibyte); |
3f817c73 KH |
937 | temp[0] = DRIVE_LETTER (drive); |
938 | name = concat2 (build_string (temp), name); | |
199607e4 RS |
939 | } |
940 | return name; | |
941 | #else /* not DOS_NT */ | |
42a5b22f | 942 | if (strcmp (nm, SSDATA (name)) == 0) |
570d7624 | 943 | return name; |
2b046a72 | 944 | return make_specified_string (nm, -1, strlen (nm), multibyte); |
5e570b75 | 945 | #endif /* not DOS_NT */ |
570d7624 JB |
946 | } |
947 | } | |
948 | ||
199607e4 RS |
949 | /* At this point, nm might or might not be an absolute file name. We |
950 | need to expand ~ or ~user if present, otherwise prefix nm with | |
951 | default_directory if nm is not absolute, and finally collapse /./ | |
952 | and /foo/../ sequences. | |
953 | ||
954 | We set newdir to be the appropriate prefix if one is needed: | |
955 | - the relevant user directory if nm starts with ~ or ~user | |
956 | - the specified drive's working dir (DOS/NT only) if nm does not | |
957 | start with / | |
958 | - the value of default_directory. | |
959 | ||
960 | Note that these prefixes are not guaranteed to be absolute (except | |
961 | for the working dir of a drive). Therefore, to ensure we always | |
962 | return an absolute name, if the final prefix is not absolute we | |
963 | append it to the current working directory. */ | |
570d7624 JB |
964 | |
965 | newdir = 0; | |
966 | ||
967 | if (nm[0] == '~') /* prefix ~ */ | |
c77d647e | 968 | { |
5e570b75 | 969 | if (IS_DIRECTORY_SEP (nm[1]) |
c77d647e JB |
970 | || nm[1] == 0) /* ~ by itself */ |
971 | { | |
6d557778 EZ |
972 | Lisp_Object tem; |
973 | ||
5976c3fe PE |
974 | if (!(newdir = egetenv ("HOME"))) |
975 | newdir = ""; | |
199607e4 | 976 | nm++; |
6d557778 EZ |
977 | /* egetenv may return a unibyte string, which will bite us since |
978 | we expect the directory to be multibyte. */ | |
9c06a1f3 EZ |
979 | tem = build_string (newdir); |
980 | if (!STRING_MULTIBYTE (tem)) | |
981 | { | |
982 | hdir = DECODE_FILE (tem); | |
5976c3fe | 983 | newdir = SSDATA (hdir); |
9c06a1f3 | 984 | } |
5e570b75 | 985 | #ifdef DOS_NT |
9a1dc3be | 986 | collapse_newdir = 0; |
4c3c22f3 | 987 | #endif |
c77d647e JB |
988 | } |
989 | else /* ~user/filename */ | |
990 | { | |
5976c3fe | 991 | char *o, *p; |
7c2fb837 | 992 | for (p = nm; *p && (!IS_DIRECTORY_SEP (*p)); p++); |
5b5a2ea1 | 993 | o = alloca (p - nm + 1); |
72af86bd | 994 | memcpy (o, nm, p - nm); |
c77d647e JB |
995 | o [p - nm] = 0; |
996 | ||
67c08d6c | 997 | BLOCK_INPUT; |
c77d647e | 998 | pw = (struct passwd *) getpwnam (o + 1); |
67c08d6c | 999 | UNBLOCK_INPUT; |
c77d647e JB |
1000 | if (pw) |
1001 | { | |
5976c3fe | 1002 | newdir = pw->pw_dir; |
c77d647e | 1003 | nm = p; |
199607e4 | 1004 | #ifdef DOS_NT |
9a1dc3be | 1005 | collapse_newdir = 0; |
199607e4 | 1006 | #endif |
c77d647e | 1007 | } |
e5d77022 | 1008 | |
c77d647e JB |
1009 | /* If we don't find a user of that name, leave the name |
1010 | unchanged; don't move nm forward to p. */ | |
1011 | } | |
1012 | } | |
570d7624 | 1013 | |
5e570b75 | 1014 | #ifdef DOS_NT |
199607e4 RS |
1015 | /* On DOS and Windows, nm is absolute if a drive name was specified; |
1016 | use the drive's current directory as the prefix if needed. */ | |
1017 | if (!newdir && drive) | |
1018 | { | |
1019 | /* Get default directory if needed to make nm absolute. */ | |
2893f146 | 1020 | char *adir = NULL; |
199607e4 RS |
1021 | if (!IS_DIRECTORY_SEP (nm[0])) |
1022 | { | |
2893f146 PE |
1023 | adir = alloca (MAXPATHLEN + 1); |
1024 | if (!getdefdir (toupper (drive) - 'A' + 1, adir)) | |
1025 | adir = NULL; | |
199607e4 | 1026 | } |
2893f146 | 1027 | if (!adir) |
199607e4 RS |
1028 | { |
1029 | /* Either nm starts with /, or drive isn't mounted. */ | |
2893f146 PE |
1030 | adir = alloca (4); |
1031 | adir[0] = DRIVE_LETTER (drive); | |
1032 | adir[1] = ':'; | |
1033 | adir[2] = '/'; | |
1034 | adir[3] = 0; | |
199607e4 | 1035 | } |
2893f146 | 1036 | newdir = adir; |
199607e4 | 1037 | } |
5e570b75 | 1038 | #endif /* DOS_NT */ |
199607e4 RS |
1039 | |
1040 | /* Finally, if no prefix has been specified and nm is not absolute, | |
1041 | then it must be expanded relative to default_directory. */ | |
1042 | ||
34097368 | 1043 | if (1 |
199607e4 RS |
1044 | #ifndef DOS_NT |
1045 | /* /... alone is not absolute on DOS and Windows. */ | |
34097368 | 1046 | && !IS_DIRECTORY_SEP (nm[0]) |
199607e4 RS |
1047 | #endif |
1048 | #ifdef WINDOWSNT | |
34097368 | 1049 | && !(IS_DIRECTORY_SEP (nm[0]) && IS_DIRECTORY_SEP (nm[1])) |
199607e4 | 1050 | #endif |
570d7624 JB |
1051 | && !newdir) |
1052 | { | |
5976c3fe | 1053 | newdir = SSDATA (default_directory); |
f0f95d31 RS |
1054 | #ifdef DOS_NT |
1055 | /* Note if special escape prefix is present, but remove for now. */ | |
1056 | if (newdir[0] == '/' && newdir[1] == ':') | |
1057 | { | |
1058 | is_escaped = 1; | |
1059 | newdir += 2; | |
1060 | } | |
1061 | #endif | |
570d7624 JB |
1062 | } |
1063 | ||
5e570b75 | 1064 | #ifdef DOS_NT |
199607e4 RS |
1065 | if (newdir) |
1066 | { | |
1067 | /* First ensure newdir is an absolute name. */ | |
1068 | if ( | |
1069 | /* Detect MSDOS file names with drive specifiers. */ | |
1070 | ! (IS_DRIVE (newdir[0]) | |
1071 | && IS_DEVICE_SEP (newdir[1]) && IS_DIRECTORY_SEP (newdir[2])) | |
1072 | #ifdef WINDOWSNT | |
1073 | /* Detect Windows file names in UNC format. */ | |
1074 | && ! (IS_DIRECTORY_SEP (newdir[0]) && IS_DIRECTORY_SEP (newdir[1])) | |
1075 | #endif | |
1076 | ) | |
1077 | { | |
1078 | /* Effectively, let newdir be (expand-file-name newdir cwd). | |
1079 | Because of the admonition against calling expand-file-name | |
1080 | when we have pointers into lisp strings, we accomplish this | |
1081 | indirectly by prepending newdir to nm if necessary, and using | |
1082 | cwd (or the wd of newdir's drive) as the new newdir. */ | |
2893f146 | 1083 | char *adir; |
c70a4df6 | 1084 | if (IS_DRIVE (newdir[0]) && IS_DEVICE_SEP (newdir[1])) |
199607e4 | 1085 | { |
5976c3fe | 1086 | drive = (unsigned char) newdir[0]; |
199607e4 RS |
1087 | newdir += 2; |
1088 | } | |
1089 | if (!IS_DIRECTORY_SEP (nm[0])) | |
1090 | { | |
1091 | char * tmp = alloca (strlen (newdir) + strlen (nm) + 2); | |
1092 | file_name_as_directory (tmp, newdir); | |
1093 | strcat (tmp, nm); | |
1094 | nm = tmp; | |
1095 | } | |
2893f146 | 1096 | adir = alloca (MAXPATHLEN + 1); |
199607e4 RS |
1097 | if (drive) |
1098 | { | |
2893f146 | 1099 | if (!getdefdir (toupper (drive) - 'A' + 1, adir)) |
199607e4 RS |
1100 | newdir = "/"; |
1101 | } | |
1102 | else | |
2893f146 PE |
1103 | getwd (adir); |
1104 | newdir = adir; | |
199607e4 RS |
1105 | } |
1106 | ||
1107 | /* Strip off drive name from prefix, if present. */ | |
c70a4df6 | 1108 | if (IS_DRIVE (newdir[0]) && IS_DEVICE_SEP (newdir[1])) |
199607e4 RS |
1109 | { |
1110 | drive = newdir[0]; | |
1111 | newdir += 2; | |
1112 | } | |
1113 | ||
1114 | /* Keep only a prefix from newdir if nm starts with slash | |
82330e7f | 1115 | (//server/share for UNC, nothing otherwise). */ |
9a1dc3be | 1116 | if (IS_DIRECTORY_SEP (nm[0]) && collapse_newdir) |
199607e4 RS |
1117 | { |
1118 | #ifdef WINDOWSNT | |
1119 | if (IS_DIRECTORY_SEP (newdir[0]) && IS_DIRECTORY_SEP (newdir[1])) | |
1120 | { | |
2893f146 PE |
1121 | char *adir = strcpy (alloca (strlen (newdir) + 1), newdir); |
1122 | char *p = adir + 2; | |
199607e4 RS |
1123 | while (*p && !IS_DIRECTORY_SEP (*p)) p++; |
1124 | p++; | |
1125 | while (*p && !IS_DIRECTORY_SEP (*p)) p++; | |
1126 | *p = 0; | |
2893f146 | 1127 | newdir = adir; |
199607e4 RS |
1128 | } |
1129 | else | |
1130 | #endif | |
1131 | newdir = ""; | |
1132 | } | |
1133 | } | |
5e570b75 | 1134 | #endif /* DOS_NT */ |
199607e4 RS |
1135 | |
1136 | if (newdir) | |
bfb61299 | 1137 | { |
57676091 | 1138 | /* Get rid of any slash at the end of newdir, unless newdir is |
f0f95d31 | 1139 | just / or // (an incomplete UNC name). */ |
199607e4 | 1140 | length = strlen (newdir); |
f0f95d31 | 1141 | if (length > 1 && IS_DIRECTORY_SEP (newdir[length - 1]) |
57676091 RS |
1142 | #ifdef WINDOWSNT |
1143 | && !(length == 2 && IS_DIRECTORY_SEP (newdir[0])) | |
1144 | #endif | |
1145 | ) | |
bfb61299 | 1146 | { |
5976c3fe | 1147 | char *temp = (char *) alloca (length); |
72af86bd | 1148 | memcpy (temp, newdir, length - 1); |
bfb61299 JB |
1149 | temp[length - 1] = 0; |
1150 | newdir = temp; | |
1151 | } | |
1152 | tlen = length + 1; | |
1153 | } | |
1154 | else | |
1155 | tlen = 0; | |
570d7624 | 1156 | |
bfb61299 JB |
1157 | /* Now concatenate the directory and name to new space in the stack frame */ |
1158 | tlen += strlen (nm) + 1; | |
5e570b75 | 1159 | #ifdef DOS_NT |
f0f95d31 RS |
1160 | /* Reserve space for drive specifier and escape prefix, since either |
1161 | or both may need to be inserted. (The Microsoft x86 compiler | |
5e570b75 | 1162 | produces incorrect code if the following two lines are combined.) */ |
5976c3fe | 1163 | target = (char *) alloca (tlen + 4); |
f0f95d31 | 1164 | target += 4; |
5e570b75 | 1165 | #else /* not DOS_NT */ |
5976c3fe | 1166 | target = (char *) alloca (tlen); |
5e570b75 | 1167 | #endif /* not DOS_NT */ |
570d7624 JB |
1168 | *target = 0; |
1169 | ||
1170 | if (newdir) | |
1171 | { | |
5e570b75 | 1172 | if (nm[0] == 0 || IS_DIRECTORY_SEP (nm[0])) |
f5321b5c | 1173 | { |
3ea2d8b2 | 1174 | #ifdef DOS_NT |
f5321b5c RS |
1175 | /* If newdir is effectively "C:/", then the drive letter will have |
1176 | been stripped and newdir will be "/". Concatenating with an | |
1177 | absolute directory in nm produces "//", which will then be | |
1178 | incorrectly treated as a network share. Ignore newdir in | |
1179 | this case (keeping the drive letter). */ | |
efdc16c9 | 1180 | if (!(drive && nm[0] && IS_DIRECTORY_SEP (newdir[0]) |
f5321b5c RS |
1181 | && newdir[1] == '\0')) |
1182 | #endif | |
1183 | strcpy (target, newdir); | |
1184 | } | |
570d7624 | 1185 | else |
c77d647e | 1186 | file_name_as_directory (target, newdir); |
570d7624 JB |
1187 | } |
1188 | ||
1189 | strcat (target, nm); | |
199607e4 | 1190 | |
214378ec GM |
1191 | /* Now canonicalize by removing `//', `/.' and `/foo/..' if they |
1192 | appear. */ | |
5b5a2ea1 | 1193 | { |
5976c3fe PE |
1194 | char *p = target; |
1195 | char *o = target; | |
570d7624 | 1196 | |
5b5a2ea1 SM |
1197 | while (*p) |
1198 | { | |
5b5a2ea1 SM |
1199 | if (!IS_DIRECTORY_SEP (*p)) |
1200 | { | |
1201 | *o++ = *p++; | |
1202 | } | |
1203 | else if (p[1] == '.' | |
1204 | && (IS_DIRECTORY_SEP (p[2]) | |
1205 | || p[2] == 0)) | |
1206 | { | |
1207 | /* If "/." is the entire filename, keep the "/". Otherwise, | |
1208 | just delete the whole "/.". */ | |
1209 | if (o == target && p[2] == '\0') | |
1210 | *o++ = *p; | |
1211 | p += 2; | |
1212 | } | |
1213 | else if (p[1] == '.' && p[2] == '.' | |
1214 | /* `/../' is the "superroot" on certain file systems. | |
1215 | Turned off on DOS_NT systems because they have no | |
1216 | "superroot" and because this causes us to produce | |
1217 | file names like "d:/../foo" which fail file-related | |
1218 | functions of the underlying OS. (To reproduce, try a | |
1219 | long series of "../../" in default_directory, longer | |
1220 | than the number of levels from the root.) */ | |
aa4060b9 | 1221 | #ifndef DOS_NT |
5b5a2ea1 | 1222 | && o != target |
aa4060b9 | 1223 | #endif |
5b5a2ea1 SM |
1224 | && (IS_DIRECTORY_SEP (p[3]) || p[3] == 0)) |
1225 | { | |
972ed246 | 1226 | #ifdef WINDOWSNT |
5976c3fe | 1227 | char *prev_o = o; |
972ed246 | 1228 | #endif |
5b5a2ea1 SM |
1229 | while (o != target && (--o) && !IS_DIRECTORY_SEP (*o)) |
1230 | ; | |
972ed246 JR |
1231 | #ifdef WINDOWSNT |
1232 | /* Don't go below server level in UNC filenames. */ | |
1233 | if (o == target + 1 && IS_DIRECTORY_SEP (*o) | |
1234 | && IS_DIRECTORY_SEP (*target)) | |
1235 | o = prev_o; | |
1236 | else | |
1237 | #endif | |
5b5a2ea1 SM |
1238 | /* Keep initial / only if this is the whole name. */ |
1239 | if (o == target && IS_ANY_SEP (*o) && p[3] == 0) | |
1240 | ++o; | |
1241 | p += 3; | |
1242 | } | |
1243 | else if (p > target && IS_DIRECTORY_SEP (p[1])) | |
1244 | /* Collapse multiple `/' in a row. */ | |
1245 | p++; | |
1246 | else | |
1247 | { | |
1248 | *o++ = *p++; | |
1249 | } | |
5b5a2ea1 | 1250 | } |
570d7624 | 1251 | |
5e570b75 | 1252 | #ifdef DOS_NT |
5b5a2ea1 | 1253 | /* At last, set drive name. */ |
5e570b75 | 1254 | #ifdef WINDOWSNT |
5b5a2ea1 SM |
1255 | /* Except for network file name. */ |
1256 | if (!(IS_DIRECTORY_SEP (target[0]) && IS_DIRECTORY_SEP (target[1]))) | |
5e570b75 | 1257 | #endif /* WINDOWSNT */ |
5b5a2ea1 SM |
1258 | { |
1259 | if (!drive) abort (); | |
1260 | target -= 2; | |
1261 | target[0] = DRIVE_LETTER (drive); | |
1262 | target[1] = ':'; | |
1263 | } | |
1264 | /* Reinsert the escape prefix if required. */ | |
1265 | if (is_escaped) | |
1266 | { | |
1267 | target -= 2; | |
1268 | target[0] = '/'; | |
1269 | target[1] = ':'; | |
1270 | } | |
087fc47a | 1271 | dostounix_filename (target); |
5e570b75 | 1272 | #endif /* DOS_NT */ |
4c3c22f3 | 1273 | |
5b5a2ea1 SM |
1274 | result = make_specified_string (target, -1, o - target, multibyte); |
1275 | } | |
beb402de KG |
1276 | |
1277 | /* Again look to see if the file name has special constructs in it | |
1278 | and perhaps call the corresponding file handler. This is needed | |
1279 | for filenames such as "/foo/../user@host:/bar/../baz". Expanding | |
1280 | the ".." component gives us "/user@host:/bar/../baz" which needs | |
1281 | to be expanded again. */ | |
1282 | handler = Ffind_file_name_handler (result, Qexpand_file_name); | |
1283 | if (!NILP (handler)) | |
1284 | return call3 (handler, Qexpand_file_name, result, default_directory); | |
1285 | ||
1286 | return result; | |
570d7624 | 1287 | } |
5e570b75 | 1288 | |
4887597a EZ |
1289 | #if 0 |
1290 | /* PLEASE DO NOT DELETE THIS COMMENTED-OUT VERSION! | |
1291 | This is the old version of expand-file-name, before it was thoroughly | |
1292 | rewritten for Emacs 10.31. We leave this version here commented-out, | |
1293 | because the code is very complex and likely to have subtle bugs. If | |
1294 | bugs _are_ found, it might be of interest to look at the old code and | |
1295 | see what did it do in the relevant situation. | |
1296 | ||
30f50381 GM |
1297 | Don't remove this code: it's true that it will be accessible |
1298 | from the repository, but a few years from deletion, people will | |
1299 | forget it is there. */ | |
4887597a EZ |
1300 | |
1301 | /* Changed this DEFUN to a DEAFUN, so as not to confuse `make-docfile'. */ | |
1302 | DEAFUN ("expand-file-name", Fexpand_file_name, Sexpand_file_name, 1, 2, 0, | |
1303 | "Convert FILENAME to absolute, and canonicalize it.\n\ | |
1304 | Second arg DEFAULT is directory to start with if FILENAME is relative\n\ | |
c70a4df6 | 1305 | \(does not start with slash); if DEFAULT is nil or missing,\n\ |
4887597a EZ |
1306 | the current buffer's value of default-directory is used.\n\ |
1307 | Filenames containing `.' or `..' as components are simplified;\n\ | |
1308 | initial `~/' expands to your home directory.\n\ | |
1309 | See also the function `substitute-in-file-name'.") | |
1310 | (name, defalt) | |
1311 | Lisp_Object name, defalt; | |
1312 | { | |
1313 | unsigned char *nm; | |
1314 | ||
1315 | register unsigned char *newdir, *p, *o; | |
93f4cf88 | 1316 | ptrdiff_t tlen; |
4887597a EZ |
1317 | unsigned char *target; |
1318 | struct passwd *pw; | |
1319 | int lose; | |
4887597a | 1320 | |
b7826503 | 1321 | CHECK_STRING (name); |
d5db4077 | 1322 | nm = SDATA (name); |
4887597a EZ |
1323 | |
1324 | /* If nm is absolute, flush ...// and detect /./ and /../. | |
1325 | If no /./ or /../ we can return right away. */ | |
7c2fb837 | 1326 | if (nm[0] == '/') |
4887597a EZ |
1327 | { |
1328 | p = nm; | |
1329 | lose = 0; | |
1330 | while (*p) | |
1331 | { | |
1332 | if (p[0] == '/' && p[1] == '/' | |
4887597a EZ |
1333 | ) |
1334 | nm = p + 1; | |
1335 | if (p[0] == '/' && p[1] == '~') | |
1336 | nm = p + 1, lose = 1; | |
1337 | if (p[0] == '/' && p[1] == '.' | |
1338 | && (p[2] == '/' || p[2] == 0 | |
1339 | || (p[2] == '.' && (p[3] == '/' || p[3] == 0)))) | |
1340 | lose = 1; | |
4887597a EZ |
1341 | p++; |
1342 | } | |
1343 | if (!lose) | |
1344 | { | |
d5db4077 | 1345 | if (nm == SDATA (name)) |
4887597a EZ |
1346 | return name; |
1347 | return build_string (nm); | |
1348 | } | |
1349 | } | |
1350 | ||
1351 | /* Now determine directory to start with and put it in NEWDIR */ | |
1352 | ||
1353 | newdir = 0; | |
1354 | ||
1355 | if (nm[0] == '~') /* prefix ~ */ | |
7c2fb837 | 1356 | if (nm[1] == '/' || nm[1] == 0)/* ~/filename */ |
4887597a EZ |
1357 | { |
1358 | if (!(newdir = (unsigned char *) egetenv ("HOME"))) | |
1359 | newdir = (unsigned char *) ""; | |
1360 | nm++; | |
4887597a EZ |
1361 | } |
1362 | else /* ~user/filename */ | |
1363 | { | |
1364 | /* Get past ~ to user */ | |
1365 | unsigned char *user = nm + 1; | |
1366 | /* Find end of name. */ | |
8966b757 | 1367 | unsigned char *ptr = (unsigned char *) strchr (user, '/'); |
93f4cf88 | 1368 | ptrdiff_t len = ptr ? ptr - user : strlen (user); |
4887597a EZ |
1369 | /* Copy the user name into temp storage. */ |
1370 | o = (unsigned char *) alloca (len + 1); | |
72af86bd | 1371 | memcpy (o, user, len); |
4887597a EZ |
1372 | o[len] = 0; |
1373 | ||
1374 | /* Look up the user name. */ | |
67c08d6c | 1375 | BLOCK_INPUT; |
4887597a | 1376 | pw = (struct passwd *) getpwnam (o + 1); |
67c08d6c | 1377 | UNBLOCK_INPUT; |
4887597a EZ |
1378 | if (!pw) |
1379 | error ("\"%s\" isn't a registered user", o + 1); | |
1380 | ||
1381 | newdir = (unsigned char *) pw->pw_dir; | |
1382 | ||
1383 | /* Discard the user name from NM. */ | |
1384 | nm += len; | |
1385 | } | |
1386 | ||
7c2fb837 | 1387 | if (nm[0] != '/' && !newdir) |
4887597a EZ |
1388 | { |
1389 | if (NILP (defalt)) | |
1390 | defalt = current_buffer->directory; | |
b7826503 | 1391 | CHECK_STRING (defalt); |
d5db4077 | 1392 | newdir = SDATA (defalt); |
4887597a EZ |
1393 | } |
1394 | ||
1395 | /* Now concatenate the directory and name to new space in the stack frame */ | |
1396 | ||
1397 | tlen = (newdir ? strlen (newdir) + 1 : 0) + strlen (nm) + 1; | |
1398 | target = (unsigned char *) alloca (tlen); | |
1399 | *target = 0; | |
1400 | ||
1401 | if (newdir) | |
1402 | { | |
4887597a EZ |
1403 | if (nm[0] == 0 || nm[0] == '/') |
1404 | strcpy (target, newdir); | |
1405 | else | |
4887597a EZ |
1406 | file_name_as_directory (target, newdir); |
1407 | } | |
1408 | ||
1409 | strcat (target, nm); | |
4887597a EZ |
1410 | |
1411 | /* Now canonicalize by removing /. and /foo/.. if they appear */ | |
1412 | ||
1413 | p = target; | |
1414 | o = target; | |
1415 | ||
1416 | while (*p) | |
1417 | { | |
4887597a EZ |
1418 | if (*p != '/') |
1419 | { | |
1420 | *o++ = *p++; | |
1421 | } | |
1422 | else if (!strncmp (p, "//", 2) | |
4887597a EZ |
1423 | ) |
1424 | { | |
1425 | o = target; | |
1426 | p++; | |
1427 | } | |
994a7262 RS |
1428 | else if (p[0] == '/' && p[1] == '.' |
1429 | && (p[2] == '/' || p[2] == 0)) | |
4887597a EZ |
1430 | p += 2; |
1431 | else if (!strncmp (p, "/..", 3) | |
1432 | /* `/../' is the "superroot" on certain file systems. */ | |
1433 | && o != target | |
1434 | && (p[3] == '/' || p[3] == 0)) | |
1435 | { | |
1436 | while (o != target && *--o != '/') | |
1437 | ; | |
4887597a EZ |
1438 | if (o == target && *o == '/') |
1439 | ++o; | |
1440 | p += 3; | |
1441 | } | |
1442 | else | |
1443 | { | |
1444 | *o++ = *p++; | |
1445 | } | |
4887597a EZ |
1446 | } |
1447 | ||
1448 | return make_string (target, o - target); | |
1449 | } | |
1450 | #endif | |
570d7624 | 1451 | \f |
c70a4df6 SM |
1452 | /* If /~ or // appears, discard everything through first slash. */ |
1453 | static int | |
5976c3fe | 1454 | file_name_absolute_p (const char *filename) |
c70a4df6 SM |
1455 | { |
1456 | return | |
1457 | (IS_DIRECTORY_SEP (*filename) || *filename == '~' | |
c70a4df6 SM |
1458 | #ifdef DOS_NT |
1459 | || (IS_DRIVE (*filename) && IS_DEVICE_SEP (filename[1]) | |
1460 | && IS_DIRECTORY_SEP (filename[2])) | |
1461 | #endif | |
1462 | ); | |
1463 | } | |
1464 | ||
5976c3fe PE |
1465 | static char * |
1466 | search_embedded_absfilename (char *nm, char *endp) | |
c70a4df6 | 1467 | { |
5976c3fe | 1468 | char *p, *s; |
c70a4df6 SM |
1469 | |
1470 | for (p = nm + 1; p < endp; p++) | |
1471 | { | |
1472 | if ((0 | |
c70a4df6 SM |
1473 | || IS_DIRECTORY_SEP (p[-1])) |
1474 | && file_name_absolute_p (p) | |
e39a993c | 1475 | #if defined (WINDOWSNT) || defined(CYGWIN) |
c70a4df6 SM |
1476 | /* // at start of file name is meaningful in Apollo, |
1477 | WindowsNT and Cygwin systems. */ | |
f34574c6 | 1478 | && !(IS_DIRECTORY_SEP (p[0]) && p - 1 == nm) |
e39a993c | 1479 | #endif /* not (WINDOWSNT || CYGWIN) */ |
c70a4df6 SM |
1480 | ) |
1481 | { | |
7c2fb837 | 1482 | for (s = p; *s && (!IS_DIRECTORY_SEP (*s)); s++); |
c70a4df6 SM |
1483 | if (p[0] == '~' && s > p + 1) /* we've got "/~something/" */ |
1484 | { | |
5976c3fe | 1485 | char *o = alloca (s - p + 1); |
c70a4df6 | 1486 | struct passwd *pw; |
72af86bd | 1487 | memcpy (o, p, s - p); |
c70a4df6 SM |
1488 | o [s - p] = 0; |
1489 | ||
1490 | /* If we have ~user and `user' exists, discard | |
1491 | everything up to ~. But if `user' does not exist, leave | |
1492 | ~user alone, it might be a literal file name. */ | |
67c08d6c YM |
1493 | BLOCK_INPUT; |
1494 | pw = getpwnam (o + 1); | |
1495 | UNBLOCK_INPUT; | |
1496 | if (pw) | |
c70a4df6 | 1497 | return p; |
c70a4df6 SM |
1498 | } |
1499 | else | |
1500 | return p; | |
1501 | } | |
1502 | } | |
1503 | return NULL; | |
1504 | } | |
1505 | ||
a7ca3326 | 1506 | DEFUN ("substitute-in-file-name", Fsubstitute_in_file_name, |
8c1a1077 PJ |
1507 | Ssubstitute_in_file_name, 1, 1, 0, |
1508 | doc: /* Substitute environment variables referred to in FILENAME. | |
1509 | `$FOO' where FOO is an environment variable name means to substitute | |
1510 | the value of that variable. The variable name should be terminated | |
1511 | with a character not a letter, digit or underscore; otherwise, enclose | |
1512 | the entire variable name in braces. | |
c68845e0 GM |
1513 | |
1514 | If `/~' appears, all of FILENAME through that `/' is discarded. | |
1515 | If `//' appears, everything up to and including the first of | |
1516 | those `/' is discarded. */) | |
5842a27b | 1517 | (Lisp_Object filename) |
570d7624 | 1518 | { |
5976c3fe | 1519 | char *nm; |
570d7624 | 1520 | |
5976c3fe PE |
1521 | register char *s, *p, *o, *x, *endp; |
1522 | char *target = NULL; | |
570d7624 JB |
1523 | int total = 0; |
1524 | int substituted = 0; | |
58aec0d6 | 1525 | int multibyte; |
5976c3fe | 1526 | char *xnm; |
8ce069f5 | 1527 | Lisp_Object handler; |
570d7624 | 1528 | |
b7826503 | 1529 | CHECK_STRING (filename); |
570d7624 | 1530 | |
58aec0d6 JR |
1531 | multibyte = STRING_MULTIBYTE (filename); |
1532 | ||
8ce069f5 RS |
1533 | /* If the file name has special constructs in it, |
1534 | call the corresponding file handler. */ | |
3b7f6e60 | 1535 | handler = Ffind_file_name_handler (filename, Qsubstitute_in_file_name); |
8ce069f5 | 1536 | if (!NILP (handler)) |
3b7f6e60 | 1537 | return call2 (handler, Qsubstitute_in_file_name, filename); |
8ce069f5 | 1538 | |
58aec0d6 JR |
1539 | /* Always work on a copy of the string, in case GC happens during |
1540 | decode of environment variables, causing the original Lisp_String | |
1541 | data to be relocated. */ | |
5976c3fe | 1542 | nm = (char *) alloca (SBYTES (filename) + 1); |
72af86bd | 1543 | memcpy (nm, SDATA (filename), SBYTES (filename) + 1); |
0f3f018c | 1544 | |
58aec0d6 | 1545 | #ifdef DOS_NT |
087fc47a | 1546 | dostounix_filename (nm); |
d5db4077 | 1547 | substituted = (strcmp (nm, SDATA (filename)) != 0); |
a5a1cc06 | 1548 | #endif |
d5db4077 | 1549 | endp = nm + SBYTES (filename); |
570d7624 | 1550 | |
82330e7f | 1551 | /* If /~ or // appears, discard everything through first slash. */ |
c70a4df6 SM |
1552 | p = search_embedded_absfilename (nm, endp); |
1553 | if (p) | |
1554 | /* Start over with the new string, so we check the file-name-handler | |
1555 | again. Important with filenames like "/home/foo//:/hello///there" | |
1556 | which whould substitute to "/:/hello///there" rather than "/there". */ | |
1557 | return Fsubstitute_in_file_name | |
58aec0d6 | 1558 | (make_specified_string (p, -1, endp - p, multibyte)); |
570d7624 JB |
1559 | |
1560 | /* See if any variables are substituted into the string | |
1561 | and find the total length of their values in `total' */ | |
1562 | ||
1563 | for (p = nm; p != endp;) | |
1564 | if (*p != '$') | |
1565 | p++; | |
1566 | else | |
1567 | { | |
1568 | p++; | |
1569 | if (p == endp) | |
1570 | goto badsubst; | |
1571 | else if (*p == '$') | |
1572 | { | |
1573 | /* "$$" means a single "$" */ | |
1574 | p++; | |
1575 | total -= 1; | |
1576 | substituted = 1; | |
1577 | continue; | |
1578 | } | |
1579 | else if (*p == '{') | |
1580 | { | |
1581 | o = ++p; | |
1582 | while (p != endp && *p != '}') p++; | |
1583 | if (*p != '}') goto missingclose; | |
1584 | s = p; | |
1585 | } | |
1586 | else | |
1587 | { | |
1588 | o = p; | |
1589 | while (p != endp && (isalnum (*p) || *p == '_')) p++; | |
1590 | s = p; | |
1591 | } | |
1592 | ||
1593 | /* Copy out the variable name */ | |
5976c3fe | 1594 | target = (char *) alloca (s - o + 1); |
570d7624 JB |
1595 | strncpy (target, o, s - o); |
1596 | target[s - o] = 0; | |
5e570b75 | 1597 | #ifdef DOS_NT |
4c3c22f3 | 1598 | strupr (target); /* $home == $HOME etc. */ |
5e570b75 | 1599 | #endif /* DOS_NT */ |
570d7624 JB |
1600 | |
1601 | /* Get variable value */ | |
5976c3fe | 1602 | o = egetenv (target); |
8d2ced53 | 1603 | if (o) |
58aec0d6 JR |
1604 | { |
1605 | /* Don't try to guess a maximum length - UTF8 can use up to | |
1606 | four bytes per character. This code is unlikely to run | |
1607 | in a situation that requires performance, so decoding the | |
1608 | env variables twice should be acceptable. Note that | |
1609 | decoding may cause a garbage collect. */ | |
1610 | Lisp_Object orig, decoded; | |
1611 | orig = make_unibyte_string (o, strlen (o)); | |
1612 | decoded = DECODE_FILE (orig); | |
1613 | total += SBYTES (decoded); | |
8d2ced53 SM |
1614 | substituted = 1; |
1615 | } | |
1616 | else if (*p == '}') | |
1617 | goto badvar; | |
570d7624 JB |
1618 | } |
1619 | ||
1620 | if (!substituted) | |
3b7f6e60 | 1621 | return filename; |
570d7624 JB |
1622 | |
1623 | /* If substitution required, recopy the string and do it */ | |
1624 | /* Make space in stack frame for the new copy */ | |
5976c3fe | 1625 | xnm = (char *) alloca (SBYTES (filename) + total + 1); |
570d7624 JB |
1626 | x = xnm; |
1627 | ||
1628 | /* Copy the rest of the name through, replacing $ constructs with values */ | |
1629 | for (p = nm; *p;) | |
1630 | if (*p != '$') | |
1631 | *x++ = *p++; | |
1632 | else | |
1633 | { | |
1634 | p++; | |
1635 | if (p == endp) | |
1636 | goto badsubst; | |
1637 | else if (*p == '$') | |
1638 | { | |
1639 | *x++ = *p++; | |
1640 | continue; | |
1641 | } | |
1642 | else if (*p == '{') | |
1643 | { | |
1644 | o = ++p; | |
1645 | while (p != endp && *p != '}') p++; | |
1646 | if (*p != '}') goto missingclose; | |
1647 | s = p++; | |
1648 | } | |
1649 | else | |
1650 | { | |
1651 | o = p; | |
1652 | while (p != endp && (isalnum (*p) || *p == '_')) p++; | |
1653 | s = p; | |
1654 | } | |
1655 | ||
1656 | /* Copy out the variable name */ | |
5976c3fe | 1657 | target = (char *) alloca (s - o + 1); |
570d7624 JB |
1658 | strncpy (target, o, s - o); |
1659 | target[s - o] = 0; | |
5e570b75 | 1660 | #ifdef DOS_NT |
4c3c22f3 | 1661 | strupr (target); /* $home == $HOME etc. */ |
5e570b75 | 1662 | #endif /* DOS_NT */ |
570d7624 JB |
1663 | |
1664 | /* Get variable value */ | |
5976c3fe | 1665 | o = egetenv (target); |
570d7624 | 1666 | if (!o) |
8d2ced53 SM |
1667 | { |
1668 | *x++ = '$'; | |
1669 | strcpy (x, target); x+= strlen (target); | |
1670 | } | |
60d67b83 RS |
1671 | else |
1672 | { | |
58aec0d6 | 1673 | Lisp_Object orig, decoded; |
93f4cf88 | 1674 | ptrdiff_t orig_length, decoded_length; |
58aec0d6 JR |
1675 | orig_length = strlen (o); |
1676 | orig = make_unibyte_string (o, orig_length); | |
1677 | decoded = DECODE_FILE (orig); | |
1678 | decoded_length = SBYTES (decoded); | |
42a5b22f | 1679 | strncpy (x, SSDATA (decoded), decoded_length); |
58aec0d6 JR |
1680 | x += decoded_length; |
1681 | ||
1682 | /* If environment variable needed decoding, return value | |
1683 | needs to be multibyte. */ | |
1684 | if (decoded_length != orig_length | |
42a5b22f | 1685 | || strncmp (SSDATA (decoded), o, orig_length)) |
58aec0d6 | 1686 | multibyte = 1; |
60d67b83 | 1687 | } |
570d7624 JB |
1688 | } |
1689 | ||
1690 | *x = 0; | |
1691 | ||
82330e7f | 1692 | /* If /~ or // appears, discard everything through first slash. */ |
c70a4df6 SM |
1693 | while ((p = search_embedded_absfilename (xnm, x))) |
1694 | /* This time we do not start over because we've already expanded envvars | |
1695 | and replaced $$ with $. Maybe we should start over as well, but we'd | |
1696 | need to quote some $ to $$ first. */ | |
1697 | xnm = p; | |
570d7624 | 1698 | |
58aec0d6 | 1699 | return make_specified_string (xnm, -1, x - xnm, multibyte); |
570d7624 JB |
1700 | |
1701 | badsubst: | |
1702 | error ("Bad format environment-variable substitution"); | |
1703 | missingclose: | |
1704 | error ("Missing \"}\" in environment-variable substitution"); | |
1705 | badvar: | |
1706 | error ("Substituting nonexistent environment variable \"%s\"", target); | |
1707 | ||
1708 | /* NOTREACHED */ | |
6bbd7a29 | 1709 | return Qnil; |
570d7624 JB |
1710 | } |
1711 | \f | |
067ffa38 | 1712 | /* A slightly faster and more convenient way to get |
298b760e | 1713 | (directory-file-name (expand-file-name FOO)). */ |
067ffa38 | 1714 | |
570d7624 | 1715 | Lisp_Object |
971de7fb | 1716 | expand_and_dir_to_file (Lisp_Object filename, Lisp_Object defdir) |
570d7624 | 1717 | { |
199607e4 | 1718 | register Lisp_Object absname; |
570d7624 | 1719 | |
199607e4 | 1720 | absname = Fexpand_file_name (filename, defdir); |
7c2fb837 | 1721 | |
199607e4 | 1722 | /* Remove final slash, if any (unless this is the root dir). |
570d7624 | 1723 | stat behaves differently depending! */ |
d5db4077 KR |
1724 | if (SCHARS (absname) > 1 |
1725 | && IS_DIRECTORY_SEP (SREF (absname, SBYTES (absname) - 1)) | |
1726 | && !IS_DEVICE_SEP (SREF (absname, SBYTES (absname)-2))) | |
ddc61f46 | 1727 | /* We cannot take shortcuts; they might be wrong for magic file names. */ |
199607e4 | 1728 | absname = Fdirectory_file_name (absname); |
199607e4 | 1729 | return absname; |
570d7624 JB |
1730 | } |
1731 | \f | |
3ed15d97 RS |
1732 | /* Signal an error if the file ABSNAME already exists. |
1733 | If INTERACTIVE is nonzero, ask the user whether to proceed, | |
1734 | and bypass the error if the user says to go ahead. | |
1735 | QUERYSTRING is a name for the action that is being considered | |
1736 | to alter the file. | |
de1d0127 | 1737 | |
3ed15d97 | 1738 | *STATPTR is used to store the stat information if the file exists. |
de1d0127 | 1739 | If the file does not exist, STATPTR->st_mode is set to 0. |
b8b29dc9 RS |
1740 | If STATPTR is null, we don't store into it. |
1741 | ||
1742 | If QUICK is nonzero, we ask for y or n, not yes or no. */ | |
3ed15d97 | 1743 | |
f14b7e14 | 1744 | static void |
5976c3fe PE |
1745 | barf_or_query_if_file_exists (Lisp_Object absname, const char *querystring, |
1746 | int interactive, struct stat *statptr, int quick) | |
570d7624 | 1747 | { |
643c73b9 | 1748 | register Lisp_Object tem, encoded_filename; |
4018b5ef | 1749 | struct stat statbuf; |
570d7624 JB |
1750 | struct gcpro gcpro1; |
1751 | ||
643c73b9 RS |
1752 | encoded_filename = ENCODE_FILE (absname); |
1753 | ||
4018b5ef RS |
1754 | /* stat is a good way to tell whether the file exists, |
1755 | regardless of what access permissions it has. */ | |
42a5b22f | 1756 | if (lstat (SSDATA (encoded_filename), &statbuf) >= 0) |
570d7624 | 1757 | { |
c4f2d8d4 LMI |
1758 | if (Ffile_directory_p (absname)) |
1759 | xsignal2 (Qfile_error, | |
ad637907 | 1760 | build_string ("File is a directory"), absname); |
c4f2d8d4 | 1761 | |
570d7624 | 1762 | if (! interactive) |
24b1ddad KS |
1763 | xsignal2 (Qfile_already_exists, |
1764 | build_string ("File already exists"), absname); | |
570d7624 | 1765 | GCPRO1 (absname); |
67e8e2b8 RS |
1766 | tem = format2 ("File %s already exists; %s anyway? ", |
1767 | absname, build_string (querystring)); | |
b8b29dc9 | 1768 | if (quick) |
5616cc54 | 1769 | tem = call1 (intern ("y-or-n-p"), tem); |
b8b29dc9 RS |
1770 | else |
1771 | tem = do_yes_or_no_p (tem); | |
570d7624 | 1772 | UNGCPRO; |
265a9e55 | 1773 | if (NILP (tem)) |
24b1ddad KS |
1774 | xsignal2 (Qfile_already_exists, |
1775 | build_string ("File already exists"), absname); | |
3ed15d97 RS |
1776 | if (statptr) |
1777 | *statptr = statbuf; | |
1778 | } | |
1779 | else | |
1780 | { | |
1781 | if (statptr) | |
1782 | statptr->st_mode = 0; | |
570d7624 JB |
1783 | } |
1784 | return; | |
1785 | } | |
1786 | ||
574c05e2 | 1787 | DEFUN ("copy-file", Fcopy_file, Scopy_file, 2, 6, |
7c0f6118 | 1788 | "fCopy file: \nGCopy %s to file: \np\nP", |
8c1a1077 PJ |
1789 | doc: /* Copy FILE to NEWNAME. Both args must be strings. |
1790 | If NEWNAME names a directory, copy FILE there. | |
795c20df CY |
1791 | |
1792 | This function always sets the file modes of the output file to match | |
1793 | the input file. | |
1794 | ||
1795 | The optional third argument OK-IF-ALREADY-EXISTS specifies what to do | |
1796 | if file NEWNAME already exists. If OK-IF-ALREADY-EXISTS is nil, we | |
1797 | signal a `file-already-exists' error without overwriting. If | |
1798 | OK-IF-ALREADY-EXISTS is a number, we request confirmation from the user | |
1799 | about overwriting; this is what happens in interactive use with M-x. | |
1800 | Any other value for OK-IF-ALREADY-EXISTS means to overwrite the | |
1801 | existing file. | |
c50f15d0 | 1802 | |
7f08b80e | 1803 | Fourth arg KEEP-TIME non-nil means give the output file the same |
8c1a1077 | 1804 | last-modified time as the old one. (This works on only some systems.) |
c50f15d0 | 1805 | |
7fce7dfe EZ |
1806 | A prefix arg makes KEEP-TIME non-nil. |
1807 | ||
586702ce | 1808 | If PRESERVE-UID-GID is non-nil, we try to transfer the |
574c05e2 KK |
1809 | uid and gid of FILE to NEWNAME. |
1810 | ||
f5783df3 | 1811 | If PRESERVE-SELINUX-CONTEXT is non-nil and SELinux is enabled |
574c05e2 | 1812 | on the system, we copy the SELinux context of FILE to NEWNAME. */) |
5842a27b | 1813 | (Lisp_Object file, Lisp_Object newname, Lisp_Object ok_if_already_exists, Lisp_Object keep_time, Lisp_Object preserve_uid_gid, Lisp_Object preserve_selinux_context) |
570d7624 | 1814 | { |
8a2cbd72 EZ |
1815 | int ifd, ofd; |
1816 | EMACS_INT n; | |
570d7624 | 1817 | char buf[16 * 1024]; |
3ed15d97 | 1818 | struct stat st, out_st; |
32f4334d | 1819 | Lisp_Object handler; |
b1d1b865 | 1820 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; |
aed13378 | 1821 | int count = SPECPDL_INDEX (); |
f73b0ada | 1822 | int input_file_statable_p; |
b1d1b865 | 1823 | Lisp_Object encoded_file, encoded_newname; |
574c05e2 KK |
1824 | #if HAVE_LIBSELINUX |
1825 | security_context_t con; | |
1826 | int fail, conlength = 0; | |
1827 | #endif | |
570d7624 | 1828 | |
b1d1b865 RS |
1829 | encoded_file = encoded_newname = Qnil; |
1830 | GCPRO4 (file, newname, encoded_file, encoded_newname); | |
b7826503 PJ |
1831 | CHECK_STRING (file); |
1832 | CHECK_STRING (newname); | |
b1d1b865 | 1833 | |
a9d14e54 | 1834 | if (!NILP (Ffile_directory_p (newname))) |
6b61353c | 1835 | newname = Fexpand_file_name (Ffile_name_nondirectory (file), newname); |
a9d14e54 GM |
1836 | else |
1837 | newname = Fexpand_file_name (newname, Qnil); | |
1838 | ||
3b7f6e60 | 1839 | file = Fexpand_file_name (file, Qnil); |
32f4334d | 1840 | |
0bf2eed2 | 1841 | /* If the input file name has special constructs in it, |
32f4334d | 1842 | call the corresponding file handler. */ |
3b7f6e60 | 1843 | handler = Ffind_file_name_handler (file, Qcopy_file); |
0bf2eed2 | 1844 | /* Likewise for output file name. */ |
51cf6d37 | 1845 | if (NILP (handler)) |
49307295 | 1846 | handler = Ffind_file_name_handler (newname, Qcopy_file); |
32f4334d | 1847 | if (!NILP (handler)) |
574c05e2 KK |
1848 | RETURN_UNGCPRO (call7 (handler, Qcopy_file, file, newname, |
1849 | ok_if_already_exists, keep_time, preserve_uid_gid, | |
1850 | preserve_selinux_context)); | |
32f4334d | 1851 | |
b1d1b865 RS |
1852 | encoded_file = ENCODE_FILE (file); |
1853 | encoded_newname = ENCODE_FILE (newname); | |
1854 | ||
265a9e55 | 1855 | if (NILP (ok_if_already_exists) |
93c30b5f | 1856 | || INTEGERP (ok_if_already_exists)) |
2f868094 | 1857 | barf_or_query_if_file_exists (newname, "copy to it", |
b8b29dc9 | 1858 | INTEGERP (ok_if_already_exists), &out_st, 0); |
42a5b22f | 1859 | else if (stat (SSDATA (encoded_newname), &out_st) < 0) |
3ed15d97 | 1860 | out_st.st_mode = 0; |
570d7624 | 1861 | |
e8691c59 | 1862 | #ifdef WINDOWSNT |
d5db4077 | 1863 | if (!CopyFile (SDATA (encoded_file), |
efdc16c9 | 1864 | SDATA (encoded_newname), |
e8691c59 GM |
1865 | FALSE)) |
1866 | report_file_error ("Copying file", Fcons (file, Fcons (newname, Qnil))); | |
8b53dc06 JR |
1867 | /* CopyFile retains the timestamp by default. */ |
1868 | else if (NILP (keep_time)) | |
e8691c59 GM |
1869 | { |
1870 | EMACS_TIME now; | |
ad497129 JR |
1871 | DWORD attributes; |
1872 | char * filename; | |
1873 | ||
e8691c59 | 1874 | EMACS_GET_TIME (now); |
d5db4077 | 1875 | filename = SDATA (encoded_newname); |
ad497129 JR |
1876 | |
1877 | /* Ensure file is writable while its modified time is set. */ | |
1878 | attributes = GetFileAttributes (filename); | |
02cca86b | 1879 | SetFileAttributes (filename, attributes & ~FILE_ATTRIBUTE_READONLY); |
ad497129 JR |
1880 | if (set_file_times (filename, now, now)) |
1881 | { | |
1882 | /* Restore original attributes. */ | |
1883 | SetFileAttributes (filename, attributes); | |
24b1ddad KS |
1884 | xsignal2 (Qfile_date_error, |
1885 | build_string ("Cannot set file date"), newname); | |
ad497129 JR |
1886 | } |
1887 | /* Restore original attributes. */ | |
1888 | SetFileAttributes (filename, attributes); | |
e8691c59 GM |
1889 | } |
1890 | #else /* not WINDOWSNT */ | |
13336908 | 1891 | immediate_quit = 1; |
42a5b22f | 1892 | ifd = emacs_open (SSDATA (encoded_file), O_RDONLY, 0); |
13336908 RS |
1893 | immediate_quit = 0; |
1894 | ||
570d7624 | 1895 | if (ifd < 0) |
3b7f6e60 | 1896 | report_file_error ("Opening input file", Fcons (file, Qnil)); |
570d7624 | 1897 | |
b5148e85 RS |
1898 | record_unwind_protect (close_file_unwind, make_number (ifd)); |
1899 | ||
f73b0ada BF |
1900 | /* We can only copy regular files and symbolic links. Other files are not |
1901 | copyable by us. */ | |
1902 | input_file_statable_p = (fstat (ifd, &st) >= 0); | |
1903 | ||
574c05e2 KK |
1904 | #if HAVE_LIBSELINUX |
1905 | if (!NILP (preserve_selinux_context) && is_selinux_enabled ()) | |
1906 | { | |
1907 | conlength = fgetfilecon (ifd, &con); | |
1908 | if (conlength == -1) | |
1909 | report_file_error ("Doing fgetfilecon", Fcons (file, Qnil)); | |
1910 | } | |
1911 | #endif | |
1912 | ||
3ed15d97 RS |
1913 | if (out_st.st_mode != 0 |
1914 | && st.st_dev == out_st.st_dev && st.st_ino == out_st.st_ino) | |
1915 | { | |
1916 | errno = 0; | |
1917 | report_file_error ("Input and output files are the same", | |
3b7f6e60 | 1918 | Fcons (file, Fcons (newname, Qnil))); |
3ed15d97 | 1919 | } |
3ed15d97 | 1920 | |
f73b0ada BF |
1921 | if (input_file_statable_p) |
1922 | { | |
1923 | if (!(S_ISREG (st.st_mode)) && !(S_ISLNK (st.st_mode))) | |
1924 | { | |
1925 | #if defined (EISDIR) | |
1926 | /* Get a better looking error message. */ | |
1927 | errno = EISDIR; | |
1928 | #endif /* EISDIR */ | |
3b7f6e60 | 1929 | report_file_error ("Non-regular file", Fcons (file, Qnil)); |
f73b0ada BF |
1930 | } |
1931 | } | |
f73b0ada | 1932 | |
4c3c22f3 RS |
1933 | #ifdef MSDOS |
1934 | /* System's default file type was set to binary by _fmode in emacs.c. */ | |
c50f15d0 | 1935 | ofd = emacs_open (SDATA (encoded_newname), |
7fce7dfe | 1936 | O_WRONLY | O_TRUNC | O_CREAT |
795c20df | 1937 | | (NILP (ok_if_already_exists) ? O_EXCL : 0), |
c50f15d0 RS |
1938 | S_IREAD | S_IWRITE); |
1939 | #else /* not MSDOS */ | |
42a5b22f | 1940 | ofd = emacs_open (SSDATA (encoded_newname), |
c50f15d0 | 1941 | O_WRONLY | O_TRUNC | O_CREAT |
795c20df | 1942 | | (NILP (ok_if_already_exists) ? O_EXCL : 0), |
c50f15d0 | 1943 | 0666); |
4c3c22f3 | 1944 | #endif /* not MSDOS */ |
570d7624 | 1945 | if (ofd < 0) |
3ed15d97 | 1946 | report_file_error ("Opening output file", Fcons (newname, Qnil)); |
b5148e85 RS |
1947 | |
1948 | record_unwind_protect (close_file_unwind, make_number (ofd)); | |
570d7624 | 1949 | |
b5148e85 RS |
1950 | immediate_quit = 1; |
1951 | QUIT; | |
68c45bf0 PE |
1952 | while ((n = emacs_read (ifd, buf, sizeof buf)) > 0) |
1953 | if (emacs_write (ofd, buf, n) != n) | |
3ed15d97 | 1954 | report_file_error ("I/O error", Fcons (newname, Qnil)); |
b5148e85 | 1955 | immediate_quit = 0; |
570d7624 | 1956 | |
b016179b EZ |
1957 | #ifndef MSDOS |
1958 | /* Preserve the original file modes, and if requested, also its | |
1959 | owner and group. */ | |
586702ce RS |
1960 | if (input_file_statable_p) |
1961 | { | |
81e56e61 PE |
1962 | if (!NILP (preserve_uid_gid) && fchown (ofd, st.st_uid, st.st_gid) != 0) |
1963 | report_file_error ("Doing chown", Fcons (newname, Qnil)); | |
1964 | if (fchmod (ofd, st.st_mode & 07777) != 0) | |
1965 | report_file_error ("Doing chmod", Fcons (newname, Qnil)); | |
586702ce | 1966 | } |
b016179b | 1967 | #endif /* not MSDOS */ |
586702ce | 1968 | |
574c05e2 KK |
1969 | #if HAVE_LIBSELINUX |
1970 | if (conlength > 0) | |
1971 | { | |
1972 | /* Set the modified context back to the file. */ | |
1973 | fail = fsetfilecon (ofd, con); | |
1974 | if (fail) | |
1975 | report_file_error ("Doing fsetfilecon", Fcons (newname, Qnil)); | |
1976 | ||
1977 | freecon (con); | |
1978 | } | |
1979 | #endif | |
1980 | ||
5acac34e | 1981 | /* Closing the output clobbers the file times on some systems. */ |
68c45bf0 | 1982 | if (emacs_close (ofd) < 0) |
5acac34e RS |
1983 | report_file_error ("I/O error", Fcons (newname, Qnil)); |
1984 | ||
f73b0ada | 1985 | if (input_file_statable_p) |
570d7624 | 1986 | { |
8ca6602c | 1987 | if (!NILP (keep_time)) |
570d7624 | 1988 | { |
de5bf5d3 JB |
1989 | EMACS_TIME atime, mtime; |
1990 | EMACS_SET_SECS_USECS (atime, st.st_atime, 0); | |
1991 | EMACS_SET_SECS_USECS (mtime, st.st_mtime, 0); | |
42a5b22f | 1992 | if (set_file_times (SSDATA (encoded_newname), |
b1d1b865 | 1993 | atime, mtime)) |
24b1ddad KS |
1994 | xsignal2 (Qfile_date_error, |
1995 | build_string ("Cannot set file date"), newname); | |
570d7624 | 1996 | } |
570d7624 JB |
1997 | } |
1998 | ||
68c45bf0 | 1999 | emacs_close (ifd); |
b016179b | 2000 | |
ed68db4d | 2001 | #ifdef MSDOS |
b016179b EZ |
2002 | if (input_file_statable_p) |
2003 | { | |
2004 | /* In DJGPP v2.0 and later, fstat usually returns true file mode bits, | |
2005 | and if it can't, it tells so. Otherwise, under MSDOS we usually | |
2006 | get only the READ bit, which will make the copied file read-only, | |
2007 | so it's better not to chmod at all. */ | |
2008 | if ((_djstat_flags & _STFAIL_WRITEBIT) == 0) | |
2009 | chmod (SDATA (encoded_newname), st.st_mode & 07777); | |
2010 | } | |
ed68db4d | 2011 | #endif /* MSDOS */ |
b016179b | 2012 | #endif /* not WINDOWSNT */ |
5acac34e | 2013 | |
b5148e85 RS |
2014 | /* Discard the unwind protects. */ |
2015 | specpdl_ptr = specpdl + count; | |
2016 | ||
570d7624 JB |
2017 | UNGCPRO; |
2018 | return Qnil; | |
2019 | } | |
385b6cc7 | 2020 | \f |
9bbe01fb | 2021 | DEFUN ("make-directory-internal", Fmake_directory_internal, |
353cfc19 | 2022 | Smake_directory_internal, 1, 1, 0, |
8c1a1077 | 2023 | doc: /* Create a new directory named DIRECTORY. */) |
5842a27b | 2024 | (Lisp_Object directory) |
570d7624 | 2025 | { |
5976c3fe | 2026 | const char *dir; |
32f4334d | 2027 | Lisp_Object handler; |
b1d1b865 | 2028 | Lisp_Object encoded_dir; |
570d7624 | 2029 | |
b7826503 | 2030 | CHECK_STRING (directory); |
3b7f6e60 | 2031 | directory = Fexpand_file_name (directory, Qnil); |
32f4334d | 2032 | |
3b7f6e60 | 2033 | handler = Ffind_file_name_handler (directory, Qmake_directory_internal); |
32f4334d | 2034 | if (!NILP (handler)) |
3b7f6e60 | 2035 | return call2 (handler, Qmake_directory_internal, directory); |
9bbe01fb | 2036 | |
b1d1b865 RS |
2037 | encoded_dir = ENCODE_FILE (directory); |
2038 | ||
5976c3fe | 2039 | dir = SSDATA (encoded_dir); |
570d7624 | 2040 | |
5e570b75 RS |
2041 | #ifdef WINDOWSNT |
2042 | if (mkdir (dir) != 0) | |
2043 | #else | |
570d7624 | 2044 | if (mkdir (dir, 0777) != 0) |
5e570b75 | 2045 | #endif |
a9f2aeae | 2046 | report_file_error ("Creating directory", list1 (directory)); |
570d7624 | 2047 | |
32f4334d | 2048 | return Qnil; |
570d7624 JB |
2049 | } |
2050 | ||
9d8f3bd9 MA |
2051 | DEFUN ("delete-directory-internal", Fdelete_directory_internal, |
2052 | Sdelete_directory_internal, 1, 1, 0, | |
efdc16c9 | 2053 | doc: /* Delete the directory named DIRECTORY. Does not follow symlinks. */) |
5842a27b | 2054 | (Lisp_Object directory) |
570d7624 | 2055 | { |
5976c3fe | 2056 | const char *dir; |
b1d1b865 | 2057 | Lisp_Object encoded_dir; |
570d7624 | 2058 | |
b7826503 | 2059 | CHECK_STRING (directory); |
3b7f6e60 | 2060 | directory = Fdirectory_file_name (Fexpand_file_name (directory, Qnil)); |
b1d1b865 | 2061 | encoded_dir = ENCODE_FILE (directory); |
5976c3fe | 2062 | dir = SSDATA (encoded_dir); |
b1d1b865 | 2063 | |
570d7624 | 2064 | if (rmdir (dir) != 0) |
a9f2aeae | 2065 | report_file_error ("Removing directory", list1 (directory)); |
570d7624 JB |
2066 | |
2067 | return Qnil; | |
2068 | } | |
2069 | ||
2e2bbddb | 2070 | DEFUN ("delete-file", Fdelete_file, Sdelete_file, 1, 2, |
f1a5d776 CY |
2071 | "(list (read-file-name \ |
2072 | (if (and delete-by-moving-to-trash (null current-prefix-arg)) \ | |
2073 | \"Move file to trash: \" \"Delete file: \") \ | |
2074 | nil default-directory (confirm-nonexistent-file-or-buffer)) \ | |
2075 | (null current-prefix-arg))", | |
efdc16c9 | 2076 | doc: /* Delete file named FILENAME. If it is a symlink, remove the symlink. |
53967e09 | 2077 | If file has multiple names, it continues to exist with the other names. |
f1a5d776 CY |
2078 | TRASH non-nil means to trash the file instead of deleting, provided |
2079 | `delete-by-moving-to-trash' is non-nil. | |
53967e09 | 2080 | |
f1a5d776 CY |
2081 | When called interactively, TRASH is t if no prefix argument is given. |
2082 | With a prefix argument, TRASH is nil. */) | |
5842a27b | 2083 | (Lisp_Object filename, Lisp_Object trash) |
570d7624 | 2084 | { |
32f4334d | 2085 | Lisp_Object handler; |
b1d1b865 | 2086 | Lisp_Object encoded_file; |
efdc16c9 | 2087 | struct gcpro gcpro1; |
b1d1b865 | 2088 | |
efdc16c9 | 2089 | GCPRO1 (filename); |
b4bd27c5 RS |
2090 | if (!NILP (Ffile_directory_p (filename)) |
2091 | && NILP (Ffile_symlink_p (filename))) | |
24b1ddad KS |
2092 | xsignal2 (Qfile_error, |
2093 | build_string ("Removing old name: is a directory"), | |
2094 | filename); | |
efdc16c9 | 2095 | UNGCPRO; |
570d7624 | 2096 | filename = Fexpand_file_name (filename, Qnil); |
32f4334d | 2097 | |
49307295 | 2098 | handler = Ffind_file_name_handler (filename, Qdelete_file); |
32f4334d | 2099 | if (!NILP (handler)) |
f5783df3 | 2100 | return call3 (handler, Qdelete_file, filename, trash); |
32f4334d | 2101 | |
f1a5d776 | 2102 | if (delete_by_moving_to_trash && !NILP (trash)) |
6cf29fe8 JR |
2103 | return call1 (Qmove_file_to_trash, filename); |
2104 | ||
b1d1b865 RS |
2105 | encoded_file = ENCODE_FILE (filename); |
2106 | ||
42a5b22f | 2107 | if (0 > unlink (SSDATA (encoded_file))) |
a9f2aeae | 2108 | report_file_error ("Removing old name", list1 (filename)); |
8a9b0da9 | 2109 | return Qnil; |
570d7624 JB |
2110 | } |
2111 | ||
385b6cc7 | 2112 | static Lisp_Object |
971de7fb | 2113 | internal_delete_file_1 (Lisp_Object ignore) |
385b6cc7 RS |
2114 | { |
2115 | return Qt; | |
2116 | } | |
2117 | ||
53967e09 | 2118 | /* Delete file FILENAME, returning 1 if successful and 0 if failed. |
f1a5d776 | 2119 | This ignores `delete-by-moving-to-trash'. */ |
385b6cc7 RS |
2120 | |
2121 | int | |
f1a5d776 | 2122 | internal_delete_file (Lisp_Object filename) |
385b6cc7 | 2123 | { |
a3911e8c | 2124 | Lisp_Object tem; |
53967e09 | 2125 | |
f1a5d776 | 2126 | tem = internal_condition_case_2 (Fdelete_file, filename, Qnil, |
a3911e8c KR |
2127 | Qt, internal_delete_file_1); |
2128 | return NILP (tem); | |
385b6cc7 RS |
2129 | } |
2130 | \f | |
570d7624 | 2131 | DEFUN ("rename-file", Frename_file, Srename_file, 2, 3, |
7c0f6118 | 2132 | "fRename file: \nGRename %s to file: \np", |
a4e03fe5 | 2133 | doc: /* Rename FILE as NEWNAME. Both args must be strings. |
8c1a1077 PJ |
2134 | If file has names other than FILE, it continues to have those names. |
2135 | Signals a `file-already-exists' error if a file NEWNAME already exists | |
2136 | unless optional third argument OK-IF-ALREADY-EXISTS is non-nil. | |
2137 | A number as third arg means request confirmation if NEWNAME already exists. | |
2138 | This is what happens in interactive use with M-x. */) | |
5842a27b | 2139 | (Lisp_Object file, Lisp_Object newname, Lisp_Object ok_if_already_exists) |
570d7624 | 2140 | { |
32f4334d | 2141 | Lisp_Object handler; |
f72b5416 JD |
2142 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4, gcpro5; |
2143 | Lisp_Object encoded_file, encoded_newname, symlink_target; | |
570d7624 | 2144 | |
f72b5416 JD |
2145 | symlink_target = encoded_file = encoded_newname = Qnil; |
2146 | GCPRO5 (file, newname, encoded_file, encoded_newname, symlink_target); | |
b7826503 PJ |
2147 | CHECK_STRING (file); |
2148 | CHECK_STRING (newname); | |
3b7f6e60 | 2149 | file = Fexpand_file_name (file, Qnil); |
1ffc5c90 | 2150 | |
f83caf70 EZ |
2151 | if ((!NILP (Ffile_directory_p (newname))) |
2152 | #ifdef DOS_NT | |
2153 | /* If the file names are identical but for the case, | |
2154 | don't attempt to move directory to itself. */ | |
2155 | && (NILP (Fstring_equal (Fdowncase (file), Fdowncase (newname)))) | |
2156 | #endif | |
2157 | ) | |
8719abec CY |
2158 | { |
2159 | Lisp_Object fname = NILP (Ffile_directory_p (file)) | |
2160 | ? file : Fdirectory_file_name (file); | |
2161 | newname = Fexpand_file_name (Ffile_name_nondirectory (fname), newname); | |
2162 | } | |
1ffc5c90 RS |
2163 | else |
2164 | newname = Fexpand_file_name (newname, Qnil); | |
32f4334d RS |
2165 | |
2166 | /* If the file name has special constructs in it, | |
2167 | call the corresponding file handler. */ | |
3b7f6e60 | 2168 | handler = Ffind_file_name_handler (file, Qrename_file); |
51cf6d37 | 2169 | if (NILP (handler)) |
49307295 | 2170 | handler = Ffind_file_name_handler (newname, Qrename_file); |
32f4334d | 2171 | if (!NILP (handler)) |
36712b0a | 2172 | RETURN_UNGCPRO (call4 (handler, Qrename_file, |
3b7f6e60 | 2173 | file, newname, ok_if_already_exists)); |
32f4334d | 2174 | |
b1d1b865 RS |
2175 | encoded_file = ENCODE_FILE (file); |
2176 | encoded_newname = ENCODE_FILE (newname); | |
2177 | ||
bc77278f EZ |
2178 | #ifdef DOS_NT |
2179 | /* If the file names are identical but for the case, don't ask for | |
2180 | confirmation: they simply want to change the letter-case of the | |
2181 | file name. */ | |
2182 | if (NILP (Fstring_equal (Fdowncase (file), Fdowncase (newname)))) | |
2183 | #endif | |
265a9e55 | 2184 | if (NILP (ok_if_already_exists) |
93c30b5f | 2185 | || INTEGERP (ok_if_already_exists)) |
2f868094 | 2186 | barf_or_query_if_file_exists (newname, "rename to it", |
b8b29dc9 | 2187 | INTEGERP (ok_if_already_exists), 0, 0); |
42a5b22f | 2188 | if (0 > rename (SSDATA (encoded_file), SSDATA (encoded_newname))) |
570d7624 JB |
2189 | { |
2190 | if (errno == EXDEV) | |
2191 | { | |
6bddfc97 | 2192 | int count; |
f72b5416 | 2193 | symlink_target = Ffile_symlink_p (file); |
440c7d00 JD |
2194 | if (! NILP (symlink_target)) |
2195 | Fmake_symbolic_link (symlink_target, newname, | |
f59abab9 | 2196 | NILP (ok_if_already_exists) ? Qnil : Qt); |
ae0d7250 | 2197 | else if (!NILP (Ffile_directory_p (file))) |
8719abec CY |
2198 | call4 (Qcopy_directory, file, newname, Qt, Qnil); |
2199 | else | |
2200 | /* We have already prompted if it was an integer, so don't | |
2201 | have copy-file prompt again. */ | |
586702ce | 2202 | Fcopy_file (file, newname, |
586702ce | 2203 | NILP (ok_if_already_exists) ? Qnil : Qt, |
574c05e2 | 2204 | Qt, Qt, Qt); |
d550c425 | 2205 | |
6bddfc97 | 2206 | count = SPECPDL_INDEX (); |
d2b66acf | 2207 | specbind (Qdelete_by_moving_to_trash, Qnil); |
8fab2362 | 2208 | |
ae0d7250 | 2209 | if (!NILP (Ffile_directory_p (file)) && NILP (symlink_target)) |
8719abec CY |
2210 | call2 (Qdelete_directory, file, Qt); |
2211 | else | |
f1a5d776 | 2212 | Fdelete_file (file, Qnil); |
6bddfc97 | 2213 | unbind_to (count, Qnil); |
570d7624 JB |
2214 | } |
2215 | else | |
a9f2aeae | 2216 | report_file_error ("Renaming", list2 (file, newname)); |
570d7624 JB |
2217 | } |
2218 | UNGCPRO; | |
2219 | return Qnil; | |
2220 | } | |
2221 | ||
2222 | DEFUN ("add-name-to-file", Fadd_name_to_file, Sadd_name_to_file, 2, 3, | |
7c0f6118 | 2223 | "fAdd name to file: \nGName to add to %s: \np", |
a4e03fe5 | 2224 | doc: /* Give FILE additional name NEWNAME. Both args must be strings. |
8c1a1077 PJ |
2225 | Signals a `file-already-exists' error if a file NEWNAME already exists |
2226 | unless optional third argument OK-IF-ALREADY-EXISTS is non-nil. | |
2227 | A number as third arg means request confirmation if NEWNAME already exists. | |
2228 | This is what happens in interactive use with M-x. */) | |
5842a27b | 2229 | (Lisp_Object file, Lisp_Object newname, Lisp_Object ok_if_already_exists) |
570d7624 | 2230 | { |
32f4334d | 2231 | Lisp_Object handler; |
b1d1b865 RS |
2232 | Lisp_Object encoded_file, encoded_newname; |
2233 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; | |
570d7624 | 2234 | |
b1d1b865 RS |
2235 | GCPRO4 (file, newname, encoded_file, encoded_newname); |
2236 | encoded_file = encoded_newname = Qnil; | |
b7826503 PJ |
2237 | CHECK_STRING (file); |
2238 | CHECK_STRING (newname); | |
3b7f6e60 | 2239 | file = Fexpand_file_name (file, Qnil); |
1ffc5c90 RS |
2240 | |
2241 | if (!NILP (Ffile_directory_p (newname))) | |
2242 | newname = Fexpand_file_name (Ffile_name_nondirectory (file), newname); | |
2243 | else | |
2244 | newname = Fexpand_file_name (newname, Qnil); | |
32f4334d RS |
2245 | |
2246 | /* If the file name has special constructs in it, | |
2247 | call the corresponding file handler. */ | |
3b7f6e60 | 2248 | handler = Ffind_file_name_handler (file, Qadd_name_to_file); |
32f4334d | 2249 | if (!NILP (handler)) |
3b7f6e60 | 2250 | RETURN_UNGCPRO (call4 (handler, Qadd_name_to_file, file, |
36712b0a | 2251 | newname, ok_if_already_exists)); |
32f4334d | 2252 | |
adc6741c RS |
2253 | /* If the new name has special constructs in it, |
2254 | call the corresponding file handler. */ | |
2255 | handler = Ffind_file_name_handler (newname, Qadd_name_to_file); | |
2256 | if (!NILP (handler)) | |
3b7f6e60 | 2257 | RETURN_UNGCPRO (call4 (handler, Qadd_name_to_file, file, |
adc6741c RS |
2258 | newname, ok_if_already_exists)); |
2259 | ||
b1d1b865 RS |
2260 | encoded_file = ENCODE_FILE (file); |
2261 | encoded_newname = ENCODE_FILE (newname); | |
2262 | ||
265a9e55 | 2263 | if (NILP (ok_if_already_exists) |
93c30b5f | 2264 | || INTEGERP (ok_if_already_exists)) |
2f868094 | 2265 | barf_or_query_if_file_exists (newname, "make it a new name", |
b8b29dc9 | 2266 | INTEGERP (ok_if_already_exists), 0, 0); |
5e570b75 | 2267 | |
42a5b22f PE |
2268 | unlink (SSDATA (newname)); |
2269 | if (0 > link (SSDATA (encoded_file), SSDATA (encoded_newname))) | |
a9f2aeae | 2270 | report_file_error ("Adding new name", list2 (file, newname)); |
570d7624 JB |
2271 | |
2272 | UNGCPRO; | |
2273 | return Qnil; | |
2274 | } | |
2275 | ||
570d7624 | 2276 | DEFUN ("make-symbolic-link", Fmake_symbolic_link, Smake_symbolic_link, 2, 3, |
7c0f6118 | 2277 | "FMake symbolic link to file: \nGMake symbolic link to file %s: \np", |
68780e2a RS |
2278 | doc: /* Make a symbolic link to FILENAME, named LINKNAME. |
2279 | Both args must be strings. | |
8c1a1077 PJ |
2280 | Signals a `file-already-exists' error if a file LINKNAME already exists |
2281 | unless optional third argument OK-IF-ALREADY-EXISTS is non-nil. | |
2282 | A number as third arg means request confirmation if LINKNAME already exists. | |
2283 | This happens for interactive use with M-x. */) | |
5842a27b | 2284 | (Lisp_Object filename, Lisp_Object linkname, Lisp_Object ok_if_already_exists) |
570d7624 | 2285 | { |
32f4334d | 2286 | Lisp_Object handler; |
b1d1b865 RS |
2287 | Lisp_Object encoded_filename, encoded_linkname; |
2288 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; | |
570d7624 | 2289 | |
b1d1b865 RS |
2290 | GCPRO4 (filename, linkname, encoded_filename, encoded_linkname); |
2291 | encoded_filename = encoded_linkname = Qnil; | |
b7826503 PJ |
2292 | CHECK_STRING (filename); |
2293 | CHECK_STRING (linkname); | |
d9bc1c99 RS |
2294 | /* If the link target has a ~, we must expand it to get |
2295 | a truly valid file name. Otherwise, do not expand; | |
2296 | we want to permit links to relative file names. */ | |
d5db4077 | 2297 | if (SREF (filename, 0) == '~') |
d9bc1c99 | 2298 | filename = Fexpand_file_name (filename, Qnil); |
1ffc5c90 RS |
2299 | |
2300 | if (!NILP (Ffile_directory_p (linkname))) | |
dac24db4 | 2301 | linkname = Fexpand_file_name (Ffile_name_nondirectory (filename), linkname); |
1ffc5c90 RS |
2302 | else |
2303 | linkname = Fexpand_file_name (linkname, Qnil); | |
32f4334d RS |
2304 | |
2305 | /* If the file name has special constructs in it, | |
2306 | call the corresponding file handler. */ | |
49307295 | 2307 | handler = Ffind_file_name_handler (filename, Qmake_symbolic_link); |
32f4334d | 2308 | if (!NILP (handler)) |
36712b0a KH |
2309 | RETURN_UNGCPRO (call4 (handler, Qmake_symbolic_link, filename, |
2310 | linkname, ok_if_already_exists)); | |
32f4334d | 2311 | |
adc6741c RS |
2312 | /* If the new link name has special constructs in it, |
2313 | call the corresponding file handler. */ | |
2314 | handler = Ffind_file_name_handler (linkname, Qmake_symbolic_link); | |
2315 | if (!NILP (handler)) | |
2316 | RETURN_UNGCPRO (call4 (handler, Qmake_symbolic_link, filename, | |
2317 | linkname, ok_if_already_exists)); | |
2318 | ||
b1d1b865 RS |
2319 | encoded_filename = ENCODE_FILE (filename); |
2320 | encoded_linkname = ENCODE_FILE (linkname); | |
2321 | ||
265a9e55 | 2322 | if (NILP (ok_if_already_exists) |
93c30b5f | 2323 | || INTEGERP (ok_if_already_exists)) |
2f868094 | 2324 | barf_or_query_if_file_exists (linkname, "make it a link", |
b8b29dc9 | 2325 | INTEGERP (ok_if_already_exists), 0, 0); |
42a5b22f PE |
2326 | if (0 > symlink (SSDATA (encoded_filename), |
2327 | SSDATA (encoded_linkname))) | |
570d7624 JB |
2328 | { |
2329 | /* If we didn't complain already, silently delete existing file. */ | |
2330 | if (errno == EEXIST) | |
2331 | { | |
42a5b22f PE |
2332 | unlink (SSDATA (encoded_linkname)); |
2333 | if (0 <= symlink (SSDATA (encoded_filename), | |
2334 | SSDATA (encoded_linkname))) | |
1a04498e KH |
2335 | { |
2336 | UNGCPRO; | |
2337 | return Qnil; | |
2338 | } | |
570d7624 | 2339 | } |
d9d0d182 PE |
2340 | if (errno == ENOSYS) |
2341 | { | |
2342 | UNGCPRO; | |
2343 | xsignal1 (Qfile_error, | |
2344 | build_string ("Symbolic links are not supported")); | |
2345 | } | |
570d7624 | 2346 | |
a9f2aeae | 2347 | report_file_error ("Making symbolic link", list2 (filename, linkname)); |
570d7624 JB |
2348 | } |
2349 | UNGCPRO; | |
2350 | return Qnil; | |
e89b536d | 2351 | } |
570d7624 | 2352 | |
570d7624 | 2353 | \f |
a7ca3326 | 2354 | DEFUN ("file-name-absolute-p", Ffile_name_absolute_p, Sfile_name_absolute_p, |
570d7624 | 2355 | 1, 1, 0, |
8c1a1077 PJ |
2356 | doc: /* Return t if file FILENAME specifies an absolute file name. |
2357 | On Unix, this is a name starting with a `/' or a `~'. */) | |
5842a27b | 2358 | (Lisp_Object filename) |
570d7624 | 2359 | { |
b7826503 | 2360 | CHECK_STRING (filename); |
5976c3fe | 2361 | return file_name_absolute_p (SSDATA (filename)) ? Qt : Qnil; |
570d7624 | 2362 | } |
3beeedfe RS |
2363 | \f |
2364 | /* Return nonzero if file FILENAME exists and can be executed. */ | |
2365 | ||
2366 | static int | |
971de7fb | 2367 | check_executable (char *filename) |
3beeedfe | 2368 | { |
3be3c08e | 2369 | #ifdef DOS_NT |
3be3c08e RS |
2370 | struct stat st; |
2371 | if (stat (filename, &st) < 0) | |
2372 | return 0; | |
199607e4 | 2373 | return ((st.st_mode & S_IEXEC) != 0); |
3be3c08e | 2374 | #else /* not DOS_NT */ |
de0be7dd RS |
2375 | #ifdef HAVE_EUIDACCESS |
2376 | return (euidaccess (filename, 1) >= 0); | |
3beeedfe RS |
2377 | #else |
2378 | /* Access isn't quite right because it uses the real uid | |
2379 | and we really want to test with the effective uid. | |
2380 | But Unix doesn't give us a right way to do it. */ | |
2381 | return (access (filename, 1) >= 0); | |
2382 | #endif | |
3be3c08e | 2383 | #endif /* not DOS_NT */ |
3beeedfe RS |
2384 | } |
2385 | ||
2386 | /* Return nonzero if file FILENAME exists and can be written. */ | |
2387 | ||
2388 | static int | |
8ea90aa3 | 2389 | check_writable (const char *filename) |
3beeedfe | 2390 | { |
3be3c08e RS |
2391 | #ifdef MSDOS |
2392 | struct stat st; | |
2393 | if (stat (filename, &st) < 0) | |
2394 | return 0; | |
f68c809d | 2395 | return (st.st_mode & S_IWRITE || S_ISDIR (st.st_mode)); |
3be3c08e | 2396 | #else /* not MSDOS */ |
41f3fb38 KH |
2397 | #ifdef HAVE_EUIDACCESS |
2398 | return (euidaccess (filename, 2) >= 0); | |
3beeedfe RS |
2399 | #else |
2400 | /* Access isn't quite right because it uses the real uid | |
2401 | and we really want to test with the effective uid. | |
2402 | But Unix doesn't give us a right way to do it. | |
2403 | Opening with O_WRONLY could work for an ordinary file, | |
2404 | but would lose for directories. */ | |
2405 | return (access (filename, 2) >= 0); | |
2406 | #endif | |
3be3c08e | 2407 | #endif /* not MSDOS */ |
3beeedfe | 2408 | } |
570d7624 | 2409 | |
a7ca3326 | 2410 | DEFUN ("file-exists-p", Ffile_exists_p, Sfile_exists_p, 1, 1, 0, |
68780e2a RS |
2411 | doc: /* Return t if file FILENAME exists (whether or not you can read it.) |
2412 | See also `file-readable-p' and `file-attributes'. | |
2413 | This returns nil for a symlink to a nonexistent file. | |
2414 | Use `file-symlink-p' to test for such links. */) | |
5842a27b | 2415 | (Lisp_Object filename) |
570d7624 | 2416 | { |
199607e4 | 2417 | Lisp_Object absname; |
32f4334d | 2418 | Lisp_Object handler; |
4018b5ef | 2419 | struct stat statbuf; |
570d7624 | 2420 | |
b7826503 | 2421 | CHECK_STRING (filename); |
199607e4 | 2422 | absname = Fexpand_file_name (filename, Qnil); |
32f4334d RS |
2423 | |
2424 | /* If the file name has special constructs in it, | |
2425 | call the corresponding file handler. */ | |
199607e4 | 2426 | handler = Ffind_file_name_handler (absname, Qfile_exists_p); |
32f4334d | 2427 | if (!NILP (handler)) |
199607e4 | 2428 | return call2 (handler, Qfile_exists_p, absname); |
32f4334d | 2429 | |
b1d1b865 RS |
2430 | absname = ENCODE_FILE (absname); |
2431 | ||
42a5b22f | 2432 | return (stat (SSDATA (absname), &statbuf) >= 0) ? Qt : Qnil; |
570d7624 JB |
2433 | } |
2434 | ||
2435 | DEFUN ("file-executable-p", Ffile_executable_p, Sfile_executable_p, 1, 1, 0, | |
8c1a1077 PJ |
2436 | doc: /* Return t if FILENAME can be executed by you. |
2437 | For a directory, this means you can access files in that directory. */) | |
5842a27b | 2438 | (Lisp_Object filename) |
570d7624 | 2439 | { |
199607e4 | 2440 | Lisp_Object absname; |
32f4334d | 2441 | Lisp_Object handler; |
570d7624 | 2442 | |
b7826503 | 2443 | CHECK_STRING (filename); |
199607e4 | 2444 | absname = Fexpand_file_name (filename, Qnil); |
32f4334d RS |
2445 | |
2446 | /* If the file name has special constructs in it, | |
2447 | call the corresponding file handler. */ | |
199607e4 | 2448 | handler = Ffind_file_name_handler (absname, Qfile_executable_p); |
32f4334d | 2449 | if (!NILP (handler)) |
199607e4 | 2450 | return call2 (handler, Qfile_executable_p, absname); |
32f4334d | 2451 | |
b1d1b865 RS |
2452 | absname = ENCODE_FILE (absname); |
2453 | ||
42a5b22f | 2454 | return (check_executable (SSDATA (absname)) ? Qt : Qnil); |
570d7624 JB |
2455 | } |
2456 | ||
a7ca3326 | 2457 | DEFUN ("file-readable-p", Ffile_readable_p, Sfile_readable_p, 1, 1, 0, |
8c1a1077 PJ |
2458 | doc: /* Return t if file FILENAME exists and you can read it. |
2459 | See also `file-exists-p' and `file-attributes'. */) | |
5842a27b | 2460 | (Lisp_Object filename) |
570d7624 | 2461 | { |
199607e4 | 2462 | Lisp_Object absname; |
32f4334d | 2463 | Lisp_Object handler; |
4018b5ef | 2464 | int desc; |
bb369dc6 RS |
2465 | int flags; |
2466 | struct stat statbuf; | |
570d7624 | 2467 | |
b7826503 | 2468 | CHECK_STRING (filename); |
199607e4 | 2469 | absname = Fexpand_file_name (filename, Qnil); |
32f4334d RS |
2470 | |
2471 | /* If the file name has special constructs in it, | |
2472 | call the corresponding file handler. */ | |
199607e4 | 2473 | handler = Ffind_file_name_handler (absname, Qfile_readable_p); |
32f4334d | 2474 | if (!NILP (handler)) |
199607e4 | 2475 | return call2 (handler, Qfile_readable_p, absname); |
32f4334d | 2476 | |
b1d1b865 RS |
2477 | absname = ENCODE_FILE (absname); |
2478 | ||
fb4c6c96 AC |
2479 | #if defined(DOS_NT) || defined(macintosh) |
2480 | /* Under MS-DOS, Windows, and Macintosh, open does not work for | |
2481 | directories. */ | |
d5db4077 | 2482 | if (access (SDATA (absname), 0) == 0) |
a8a7d065 RS |
2483 | return Qt; |
2484 | return Qnil; | |
fb4c6c96 | 2485 | #else /* not DOS_NT and not macintosh */ |
bb369dc6 | 2486 | flags = O_RDONLY; |
ae0d7250 | 2487 | #ifdef O_NONBLOCK |
bb369dc6 RS |
2488 | /* Opening a fifo without O_NONBLOCK can wait. |
2489 | We don't want to wait. But we don't want to mess wth O_NONBLOCK | |
2490 | except in the case of a fifo, on a system which handles it. */ | |
42a5b22f | 2491 | desc = stat (SSDATA (absname), &statbuf); |
bb369dc6 RS |
2492 | if (desc < 0) |
2493 | return Qnil; | |
2494 | if (S_ISFIFO (statbuf.st_mode)) | |
2495 | flags |= O_NONBLOCK; | |
2496 | #endif | |
42a5b22f | 2497 | desc = emacs_open (SSDATA (absname), flags, 0); |
4018b5ef RS |
2498 | if (desc < 0) |
2499 | return Qnil; | |
68c45bf0 | 2500 | emacs_close (desc); |
4018b5ef | 2501 | return Qt; |
fb4c6c96 | 2502 | #endif /* not DOS_NT and not macintosh */ |
570d7624 JB |
2503 | } |
2504 | ||
f793dc6c RS |
2505 | /* Having this before file-symlink-p mysteriously caused it to be forgotten |
2506 | on the RT/PC. */ | |
2507 | DEFUN ("file-writable-p", Ffile_writable_p, Sfile_writable_p, 1, 1, 0, | |
8c1a1077 | 2508 | doc: /* Return t if file FILENAME can be written or created by you. */) |
5842a27b | 2509 | (Lisp_Object filename) |
f793dc6c | 2510 | { |
b1d1b865 | 2511 | Lisp_Object absname, dir, encoded; |
f793dc6c RS |
2512 | Lisp_Object handler; |
2513 | struct stat statbuf; | |
2514 | ||
b7826503 | 2515 | CHECK_STRING (filename); |
199607e4 | 2516 | absname = Fexpand_file_name (filename, Qnil); |
f793dc6c RS |
2517 | |
2518 | /* If the file name has special constructs in it, | |
2519 | call the corresponding file handler. */ | |
199607e4 | 2520 | handler = Ffind_file_name_handler (absname, Qfile_writable_p); |
f793dc6c | 2521 | if (!NILP (handler)) |
199607e4 | 2522 | return call2 (handler, Qfile_writable_p, absname); |
f793dc6c | 2523 | |
b1d1b865 | 2524 | encoded = ENCODE_FILE (absname); |
42a5b22f PE |
2525 | if (stat (SSDATA (encoded), &statbuf) >= 0) |
2526 | return (check_writable (SSDATA (encoded)) | |
f793dc6c | 2527 | ? Qt : Qnil); |
b1d1b865 | 2528 | |
199607e4 | 2529 | dir = Ffile_name_directory (absname); |
f793dc6c RS |
2530 | #ifdef MSDOS |
2531 | if (!NILP (dir)) | |
2532 | dir = Fdirectory_file_name (dir); | |
2533 | #endif /* MSDOS */ | |
b1d1b865 RS |
2534 | |
2535 | dir = ENCODE_FILE (dir); | |
e3e8a75a GM |
2536 | #ifdef WINDOWSNT |
2537 | /* The read-only attribute of the parent directory doesn't affect | |
2538 | whether a file or directory can be created within it. Some day we | |
2539 | should check ACLs though, which do affect this. */ | |
d5db4077 | 2540 | if (stat (SDATA (dir), &statbuf) < 0) |
e3e8a75a | 2541 | return Qnil; |
f68c809d | 2542 | return S_ISDIR (statbuf.st_mode) ? Qt : Qnil; |
e3e8a75a | 2543 | #else |
51b59d79 | 2544 | return (check_writable (!NILP (dir) ? SSDATA (dir) : "") |
f793dc6c | 2545 | ? Qt : Qnil); |
e3e8a75a | 2546 | #endif |
f793dc6c RS |
2547 | } |
2548 | \f | |
1f8653eb | 2549 | DEFUN ("access-file", Faccess_file, Saccess_file, 2, 2, 0, |
8c1a1077 PJ |
2550 | doc: /* Access file FILENAME, and get an error if that does not work. |
2551 | The second argument STRING is used in the error message. | |
a4e03fe5 | 2552 | If there is no error, returns nil. */) |
5842a27b | 2553 | (Lisp_Object filename, Lisp_Object string) |
1f8653eb | 2554 | { |
49475635 | 2555 | Lisp_Object handler, encoded_filename, absname; |
1f8653eb RS |
2556 | int fd; |
2557 | ||
b7826503 | 2558 | CHECK_STRING (filename); |
49475635 EZ |
2559 | absname = Fexpand_file_name (filename, Qnil); |
2560 | ||
b7826503 | 2561 | CHECK_STRING (string); |
1f8653eb RS |
2562 | |
2563 | /* If the file name has special constructs in it, | |
2564 | call the corresponding file handler. */ | |
49475635 | 2565 | handler = Ffind_file_name_handler (absname, Qaccess_file); |
1f8653eb | 2566 | if (!NILP (handler)) |
49475635 | 2567 | return call3 (handler, Qaccess_file, absname, string); |
1f8653eb | 2568 | |
49475635 | 2569 | encoded_filename = ENCODE_FILE (absname); |
b1d1b865 | 2570 | |
42a5b22f | 2571 | fd = emacs_open (SSDATA (encoded_filename), O_RDONLY, 0); |
1f8653eb | 2572 | if (fd < 0) |
42a5b22f | 2573 | report_file_error (SSDATA (string), Fcons (filename, Qnil)); |
68c45bf0 | 2574 | emacs_close (fd); |
1f8653eb RS |
2575 | |
2576 | return Qnil; | |
2577 | } | |
2578 | \f | |
a7ca3326 | 2579 | DEFUN ("file-symlink-p", Ffile_symlink_p, Sfile_symlink_p, 1, 1, 0, |
8c1a1077 | 2580 | doc: /* Return non-nil if file FILENAME is the name of a symbolic link. |
1c353c74 | 2581 | The value is the link target, as a string. |
68780e2a RS |
2582 | Otherwise it returns nil. |
2583 | ||
2584 | This function returns t when given the name of a symlink that | |
2585 | points to a nonexistent file. */) | |
5842a27b | 2586 | (Lisp_Object filename) |
570d7624 | 2587 | { |
32f4334d | 2588 | Lisp_Object handler; |
ae0d7250 | 2589 | char *buf; |
ae0d7250 | 2590 | Lisp_Object val; |
d1fdcab7 | 2591 | char readlink_buf[READLINK_BUFSIZE]; |
570d7624 | 2592 | |
b7826503 | 2593 | CHECK_STRING (filename); |
570d7624 JB |
2594 | filename = Fexpand_file_name (filename, Qnil); |
2595 | ||
32f4334d RS |
2596 | /* If the file name has special constructs in it, |
2597 | call the corresponding file handler. */ | |
49307295 | 2598 | handler = Ffind_file_name_handler (filename, Qfile_symlink_p); |
32f4334d RS |
2599 | if (!NILP (handler)) |
2600 | return call2 (handler, Qfile_symlink_p, filename); | |
2601 | ||
b1d1b865 RS |
2602 | filename = ENCODE_FILE (filename); |
2603 | ||
d1fdcab7 PE |
2604 | buf = emacs_readlink (SSDATA (filename), readlink_buf); |
2605 | if (! buf) | |
2606 | return Qnil; | |
efdc16c9 | 2607 | |
d1fdcab7 | 2608 | val = build_string (buf); |
8966b757 | 2609 | if (buf[0] == '/' && strchr (buf, ':')) |
69ac1891 | 2610 | val = concat2 (build_string ("/:"), val); |
d1fdcab7 PE |
2611 | if (buf != readlink_buf) |
2612 | xfree (buf); | |
cd913586 KH |
2613 | val = DECODE_FILE (val); |
2614 | return val; | |
570d7624 JB |
2615 | } |
2616 | ||
a7ca3326 | 2617 | DEFUN ("file-directory-p", Ffile_directory_p, Sfile_directory_p, 1, 1, 0, |
8c1a1077 PJ |
2618 | doc: /* Return t if FILENAME names an existing directory. |
2619 | Symbolic links to directories count as directories. | |
2620 | See `file-symlink-p' to distinguish symlinks. */) | |
5842a27b | 2621 | (Lisp_Object filename) |
570d7624 | 2622 | { |
199607e4 | 2623 | register Lisp_Object absname; |
570d7624 | 2624 | struct stat st; |
32f4334d | 2625 | Lisp_Object handler; |
570d7624 | 2626 | |
4b4deea2 | 2627 | absname = expand_and_dir_to_file (filename, BVAR (current_buffer, directory)); |
570d7624 | 2628 | |
32f4334d RS |
2629 | /* If the file name has special constructs in it, |
2630 | call the corresponding file handler. */ | |
199607e4 | 2631 | handler = Ffind_file_name_handler (absname, Qfile_directory_p); |
32f4334d | 2632 | if (!NILP (handler)) |
199607e4 | 2633 | return call2 (handler, Qfile_directory_p, absname); |
32f4334d | 2634 | |
b1d1b865 RS |
2635 | absname = ENCODE_FILE (absname); |
2636 | ||
42a5b22f | 2637 | if (stat (SSDATA (absname), &st) < 0) |
570d7624 | 2638 | return Qnil; |
f68c809d | 2639 | return S_ISDIR (st.st_mode) ? Qt : Qnil; |
570d7624 JB |
2640 | } |
2641 | ||
a7ca3326 | 2642 | DEFUN ("file-accessible-directory-p", Ffile_accessible_directory_p, |
16a97296 | 2643 | Sfile_accessible_directory_p, 1, 1, 0, |
e385ec41 RS |
2644 | doc: /* Return t if file FILENAME names a directory you can open. |
2645 | For the value to be t, FILENAME must specify the name of a directory as a file, | |
2646 | and the directory must allow you to open files in it. In order to use a | |
8c1a1077 PJ |
2647 | directory as a buffer's current directory, this predicate must return true. |
2648 | A directory name spec may be given instead; then the value is t | |
2649 | if the directory so specified exists and really is a readable and | |
2650 | searchable directory. */) | |
5842a27b | 2651 | (Lisp_Object filename) |
b72dea2a | 2652 | { |
32f4334d | 2653 | Lisp_Object handler; |
1a04498e | 2654 | int tem; |
d26859eb | 2655 | struct gcpro gcpro1; |
32f4334d RS |
2656 | |
2657 | /* If the file name has special constructs in it, | |
2658 | call the corresponding file handler. */ | |
49307295 | 2659 | handler = Ffind_file_name_handler (filename, Qfile_accessible_directory_p); |
32f4334d RS |
2660 | if (!NILP (handler)) |
2661 | return call2 (handler, Qfile_accessible_directory_p, filename); | |
2662 | ||
d26859eb | 2663 | GCPRO1 (filename); |
1a04498e KH |
2664 | tem = (NILP (Ffile_directory_p (filename)) |
2665 | || NILP (Ffile_executable_p (filename))); | |
d26859eb | 2666 | UNGCPRO; |
1a04498e | 2667 | return tem ? Qnil : Qt; |
b72dea2a JB |
2668 | } |
2669 | ||
f793dc6c | 2670 | DEFUN ("file-regular-p", Ffile_regular_p, Sfile_regular_p, 1, 1, 0, |
19a9c3b7 LH |
2671 | doc: /* Return t if FILENAME names a regular file. |
2672 | This is the sort of file that holds an ordinary stream of data bytes. | |
2673 | Symbolic links to regular files count as regular files. | |
2674 | See `file-symlink-p' to distinguish symlinks. */) | |
5842a27b | 2675 | (Lisp_Object filename) |
f793dc6c | 2676 | { |
199607e4 | 2677 | register Lisp_Object absname; |
f793dc6c RS |
2678 | struct stat st; |
2679 | Lisp_Object handler; | |
2680 | ||
4b4deea2 | 2681 | absname = expand_and_dir_to_file (filename, BVAR (current_buffer, directory)); |
f793dc6c RS |
2682 | |
2683 | /* If the file name has special constructs in it, | |
2684 | call the corresponding file handler. */ | |
199607e4 | 2685 | handler = Ffind_file_name_handler (absname, Qfile_regular_p); |
f793dc6c | 2686 | if (!NILP (handler)) |
199607e4 | 2687 | return call2 (handler, Qfile_regular_p, absname); |
f793dc6c | 2688 | |
b1d1b865 RS |
2689 | absname = ENCODE_FILE (absname); |
2690 | ||
c1c4693e RS |
2691 | #ifdef WINDOWSNT |
2692 | { | |
2693 | int result; | |
2694 | Lisp_Object tem = Vw32_get_true_file_attributes; | |
2695 | ||
2696 | /* Tell stat to use expensive method to get accurate info. */ | |
2697 | Vw32_get_true_file_attributes = Qt; | |
d5db4077 | 2698 | result = stat (SDATA (absname), &st); |
c1c4693e RS |
2699 | Vw32_get_true_file_attributes = tem; |
2700 | ||
2701 | if (result < 0) | |
2702 | return Qnil; | |
f68c809d | 2703 | return S_ISREG (st.st_mode) ? Qt : Qnil; |
c1c4693e RS |
2704 | } |
2705 | #else | |
42a5b22f | 2706 | if (stat (SSDATA (absname), &st) < 0) |
f793dc6c | 2707 | return Qnil; |
f68c809d | 2708 | return S_ISREG (st.st_mode) ? Qt : Qnil; |
c1c4693e | 2709 | #endif |
f793dc6c RS |
2710 | } |
2711 | \f | |
574c05e2 KK |
2712 | DEFUN ("file-selinux-context", Ffile_selinux_context, |
2713 | Sfile_selinux_context, 1, 1, 0, | |
2714 | doc: /* Return SELinux context of file named FILENAME, | |
2715 | as a list ("user", "role", "type", "range"). Return (nil, nil, nil, nil) | |
2716 | if file does not exist, is not accessible, or SELinux is disabled */) | |
5842a27b | 2717 | (Lisp_Object filename) |
574c05e2 KK |
2718 | { |
2719 | Lisp_Object absname; | |
2720 | Lisp_Object values[4]; | |
2721 | Lisp_Object handler; | |
2722 | #if HAVE_LIBSELINUX | |
2723 | security_context_t con; | |
2724 | int conlength; | |
2725 | context_t context; | |
2726 | #endif | |
2727 | ||
4b4deea2 | 2728 | absname = expand_and_dir_to_file (filename, BVAR (current_buffer, directory)); |
574c05e2 KK |
2729 | |
2730 | /* If the file name has special constructs in it, | |
2731 | call the corresponding file handler. */ | |
2732 | handler = Ffind_file_name_handler (absname, Qfile_selinux_context); | |
2733 | if (!NILP (handler)) | |
2734 | return call2 (handler, Qfile_selinux_context, absname); | |
2735 | ||
2736 | absname = ENCODE_FILE (absname); | |
2737 | ||
2738 | values[0] = Qnil; | |
2739 | values[1] = Qnil; | |
2740 | values[2] = Qnil; | |
2741 | values[3] = Qnil; | |
2742 | #if HAVE_LIBSELINUX | |
2743 | if (is_selinux_enabled ()) | |
2744 | { | |
b14aac08 | 2745 | conlength = lgetfilecon (SSDATA (absname), &con); |
574c05e2 KK |
2746 | if (conlength > 0) |
2747 | { | |
2748 | context = context_new (con); | |
45841e65 KK |
2749 | if (context_user_get (context)) |
2750 | values[0] = build_string (context_user_get (context)); | |
2751 | if (context_role_get (context)) | |
2752 | values[1] = build_string (context_role_get (context)); | |
2753 | if (context_type_get (context)) | |
2754 | values[2] = build_string (context_type_get (context)); | |
2755 | if (context_range_get (context)) | |
2756 | values[3] = build_string (context_range_get (context)); | |
574c05e2 KK |
2757 | context_free (context); |
2758 | } | |
2759 | if (con) | |
2760 | freecon (con); | |
2761 | } | |
2762 | #endif | |
2763 | ||
2764 | return Flist (sizeof(values) / sizeof(values[0]), values); | |
2765 | } | |
2766 | \f | |
2767 | DEFUN ("set-file-selinux-context", Fset_file_selinux_context, | |
2768 | Sset_file_selinux_context, 2, 2, 0, | |
2769 | doc: /* Set SELinux context of file named FILENAME to CONTEXT | |
2770 | as a list ("user", "role", "type", "range"). Has no effect if SELinux | |
2771 | is disabled. */) | |
5842a27b | 2772 | (Lisp_Object filename, Lisp_Object context) |
574c05e2 | 2773 | { |
0f4a96b5 | 2774 | Lisp_Object absname; |
574c05e2 | 2775 | Lisp_Object handler; |
0f4a96b5 JB |
2776 | #if HAVE_LIBSELINUX |
2777 | Lisp_Object encoded_absname; | |
574c05e2 KK |
2778 | Lisp_Object user = CAR_SAFE (context); |
2779 | Lisp_Object role = CAR_SAFE (CDR_SAFE (context)); | |
2780 | Lisp_Object type = CAR_SAFE (CDR_SAFE (CDR_SAFE (context))); | |
2781 | Lisp_Object range = CAR_SAFE (CDR_SAFE (CDR_SAFE (CDR_SAFE (context)))); | |
574c05e2 KK |
2782 | security_context_t con; |
2783 | int fail, conlength; | |
2784 | context_t parsed_con; | |
2785 | #endif | |
2786 | ||
4b4deea2 | 2787 | absname = Fexpand_file_name (filename, BVAR (current_buffer, directory)); |
574c05e2 KK |
2788 | |
2789 | /* If the file name has special constructs in it, | |
2790 | call the corresponding file handler. */ | |
2791 | handler = Ffind_file_name_handler (absname, Qset_file_selinux_context); | |
2792 | if (!NILP (handler)) | |
2793 | return call3 (handler, Qset_file_selinux_context, absname, context); | |
2794 | ||
0f4a96b5 | 2795 | #if HAVE_LIBSELINUX |
574c05e2 KK |
2796 | if (is_selinux_enabled ()) |
2797 | { | |
2798 | /* Get current file context. */ | |
a9b53ad3 | 2799 | encoded_absname = ENCODE_FILE (absname); |
b14aac08 | 2800 | conlength = lgetfilecon (SSDATA (encoded_absname), &con); |
574c05e2 KK |
2801 | if (conlength > 0) |
2802 | { | |
2803 | parsed_con = context_new (con); | |
2804 | /* Change the parts defined in the parameter.*/ | |
2805 | if (STRINGP (user)) | |
2806 | { | |
b14aac08 | 2807 | if (context_user_set (parsed_con, SSDATA (user))) |
574c05e2 KK |
2808 | error ("Doing context_user_set"); |
2809 | } | |
2810 | if (STRINGP (role)) | |
2811 | { | |
b14aac08 | 2812 | if (context_role_set (parsed_con, SSDATA (role))) |
574c05e2 KK |
2813 | error ("Doing context_role_set"); |
2814 | } | |
2815 | if (STRINGP (type)) | |
2816 | { | |
b14aac08 | 2817 | if (context_type_set (parsed_con, SSDATA (type))) |
574c05e2 KK |
2818 | error ("Doing context_type_set"); |
2819 | } | |
2820 | if (STRINGP (range)) | |
2821 | { | |
b14aac08 | 2822 | if (context_range_set (parsed_con, SSDATA (range))) |
574c05e2 KK |
2823 | error ("Doing context_range_set"); |
2824 | } | |
2825 | ||
2826 | /* Set the modified context back to the file. */ | |
b14aac08 PE |
2827 | fail = lsetfilecon (SSDATA (encoded_absname), |
2828 | context_str (parsed_con)); | |
574c05e2 KK |
2829 | if (fail) |
2830 | report_file_error ("Doing lsetfilecon", Fcons (absname, Qnil)); | |
2831 | ||
2832 | context_free (parsed_con); | |
2833 | } | |
2834 | else | |
2835 | report_file_error("Doing lgetfilecon", Fcons (absname, Qnil)); | |
2836 | ||
2837 | if (con) | |
2838 | freecon (con); | |
2839 | } | |
2840 | #endif | |
2841 | ||
2842 | return Qnil; | |
2843 | } | |
2844 | \f | |
570d7624 | 2845 | DEFUN ("file-modes", Ffile_modes, Sfile_modes, 1, 1, 0, |
d4a42098 KS |
2846 | doc: /* Return mode bits of file named FILENAME, as an integer. |
2847 | Return nil, if file does not exist or is not accessible. */) | |
5842a27b | 2848 | (Lisp_Object filename) |
570d7624 | 2849 | { |
199607e4 | 2850 | Lisp_Object absname; |
570d7624 | 2851 | struct stat st; |
32f4334d | 2852 | Lisp_Object handler; |
570d7624 | 2853 | |
4b4deea2 | 2854 | absname = expand_and_dir_to_file (filename, BVAR (current_buffer, directory)); |
570d7624 | 2855 | |
32f4334d RS |
2856 | /* If the file name has special constructs in it, |
2857 | call the corresponding file handler. */ | |
199607e4 | 2858 | handler = Ffind_file_name_handler (absname, Qfile_modes); |
32f4334d | 2859 | if (!NILP (handler)) |
199607e4 | 2860 | return call2 (handler, Qfile_modes, absname); |
32f4334d | 2861 | |
b1d1b865 RS |
2862 | absname = ENCODE_FILE (absname); |
2863 | ||
42a5b22f | 2864 | if (stat (SSDATA (absname), &st) < 0) |
570d7624 | 2865 | return Qnil; |
3ace87e3 | 2866 | |
570d7624 JB |
2867 | return make_number (st.st_mode & 07777); |
2868 | } | |
2869 | ||
09fbdf6c MC |
2870 | DEFUN ("set-file-modes", Fset_file_modes, Sset_file_modes, 2, 2, |
2871 | "(let ((file (read-file-name \"File: \"))) \ | |
2872 | (list file (read-file-modes nil file)))", | |
8c1a1077 | 2873 | doc: /* Set mode bits of file named FILENAME to MODE (an integer). |
ea429250 EZ |
2874 | Only the 12 low bits of MODE are used. |
2875 | ||
2876 | Interactively, mode bits are read by `read-file-modes', which accepts | |
712adc82 | 2877 | symbolic notation, like the `chmod' command from GNU Coreutils. */) |
5842a27b | 2878 | (Lisp_Object filename, Lisp_Object mode) |
570d7624 | 2879 | { |
b1d1b865 | 2880 | Lisp_Object absname, encoded_absname; |
32f4334d | 2881 | Lisp_Object handler; |
570d7624 | 2882 | |
4b4deea2 | 2883 | absname = Fexpand_file_name (filename, BVAR (current_buffer, directory)); |
b7826503 | 2884 | CHECK_NUMBER (mode); |
570d7624 | 2885 | |
32f4334d RS |
2886 | /* If the file name has special constructs in it, |
2887 | call the corresponding file handler. */ | |
199607e4 | 2888 | handler = Ffind_file_name_handler (absname, Qset_file_modes); |
32f4334d | 2889 | if (!NILP (handler)) |
199607e4 | 2890 | return call3 (handler, Qset_file_modes, absname, mode); |
32f4334d | 2891 | |
b1d1b865 RS |
2892 | encoded_absname = ENCODE_FILE (absname); |
2893 | ||
42a5b22f | 2894 | if (chmod (SSDATA (encoded_absname), XINT (mode)) < 0) |
199607e4 | 2895 | report_file_error ("Doing chmod", Fcons (absname, Qnil)); |
570d7624 JB |
2896 | |
2897 | return Qnil; | |
2898 | } | |
2899 | ||
c24e9a53 | 2900 | DEFUN ("set-default-file-modes", Fset_default_file_modes, Sset_default_file_modes, 1, 1, 0, |
8c1a1077 PJ |
2901 | doc: /* Set the file permission bits for newly created files. |
2902 | The argument MODE should be an integer; only the low 9 bits are used. | |
2903 | This setting is inherited by subprocesses. */) | |
5842a27b | 2904 | (Lisp_Object mode) |
36a8c287 | 2905 | { |
b7826503 | 2906 | CHECK_NUMBER (mode); |
199607e4 | 2907 | |
5f85ea58 | 2908 | umask ((~ XINT (mode)) & 0777); |
36a8c287 JB |
2909 | |
2910 | return Qnil; | |
2911 | } | |
2912 | ||
c24e9a53 | 2913 | DEFUN ("default-file-modes", Fdefault_file_modes, Sdefault_file_modes, 0, 0, 0, |
8c1a1077 PJ |
2914 | doc: /* Return the default file protection for created files. |
2915 | The value is an integer. */) | |
5842a27b | 2916 | (void) |
36a8c287 | 2917 | { |
5f85ea58 RS |
2918 | int realmask; |
2919 | Lisp_Object value; | |
36a8c287 | 2920 | |
5f85ea58 RS |
2921 | realmask = umask (0); |
2922 | umask (realmask); | |
36a8c287 | 2923 | |
46283abe | 2924 | XSETINT (value, (~ realmask) & 0777); |
5f85ea58 | 2925 | return value; |
36a8c287 | 2926 | } |
819da85b | 2927 | \f |
819da85b EZ |
2928 | |
2929 | DEFUN ("set-file-times", Fset_file_times, Sset_file_times, 1, 2, 0, | |
f839df0c | 2930 | doc: /* Set times of file FILENAME to TIMESTAMP. |
819da85b EZ |
2931 | Set both access and modification times. |
2932 | Return t on success, else nil. | |
f839df0c | 2933 | Use the current time if TIMESTAMP is nil. TIMESTAMP is in the format of |
819da85b | 2934 | `current-time'. */) |
f839df0c | 2935 | (Lisp_Object filename, Lisp_Object timestamp) |
819da85b EZ |
2936 | { |
2937 | Lisp_Object absname, encoded_absname; | |
2938 | Lisp_Object handler; | |
2939 | time_t sec; | |
2940 | int usec; | |
2941 | ||
f839df0c | 2942 | if (! lisp_time_argument (timestamp, &sec, &usec)) |
819da85b EZ |
2943 | error ("Invalid time specification"); |
2944 | ||
4b4deea2 | 2945 | absname = Fexpand_file_name (filename, BVAR (current_buffer, directory)); |
819da85b EZ |
2946 | |
2947 | /* If the file name has special constructs in it, | |
2948 | call the corresponding file handler. */ | |
2949 | handler = Ffind_file_name_handler (absname, Qset_file_times); | |
2950 | if (!NILP (handler)) | |
f839df0c | 2951 | return call3 (handler, Qset_file_times, absname, timestamp); |
819da85b EZ |
2952 | |
2953 | encoded_absname = ENCODE_FILE (absname); | |
5df5e07c | 2954 | |
819da85b EZ |
2955 | { |
2956 | EMACS_TIME t; | |
2957 | ||
2958 | EMACS_SET_SECS (t, sec); | |
2959 | EMACS_SET_USECS (t, usec); | |
2960 | ||
42a5b22f | 2961 | if (set_file_times (SSDATA (encoded_absname), t, t)) |
819da85b EZ |
2962 | { |
2963 | #ifdef DOS_NT | |
2964 | struct stat st; | |
2965 | ||
2966 | /* Setting times on a directory always fails. */ | |
f68c809d | 2967 | if (stat (SSDATA (encoded_absname), &st) == 0 && S_ISDIR (st.st_mode)) |
819da85b EZ |
2968 | return Qnil; |
2969 | #endif | |
2970 | report_file_error ("Setting file times", Fcons (absname, Qnil)); | |
2971 | return Qnil; | |
2972 | } | |
2973 | } | |
5df5e07c | 2974 | |
819da85b EZ |
2975 | return Qt; |
2976 | } | |
f793dc6c | 2977 | \f |
697c17a2 | 2978 | #ifdef HAVE_SYNC |
85ffea93 | 2979 | DEFUN ("unix-sync", Funix_sync, Sunix_sync, 0, 0, "", |
8c1a1077 | 2980 | doc: /* Tell Unix to finish all pending disk updates. */) |
5842a27b | 2981 | (void) |
85ffea93 RS |
2982 | { |
2983 | sync (); | |
2984 | return Qnil; | |
2985 | } | |
2986 | ||
697c17a2 | 2987 | #endif /* HAVE_SYNC */ |
85ffea93 | 2988 | |
570d7624 | 2989 | DEFUN ("file-newer-than-file-p", Ffile_newer_than_file_p, Sfile_newer_than_file_p, 2, 2, 0, |
8c1a1077 PJ |
2990 | doc: /* Return t if file FILE1 is newer than file FILE2. |
2991 | If FILE1 does not exist, the answer is nil; | |
2992 | otherwise, if FILE2 does not exist, the answer is t. */) | |
5842a27b | 2993 | (Lisp_Object file1, Lisp_Object file2) |
570d7624 | 2994 | { |
199607e4 | 2995 | Lisp_Object absname1, absname2; |
570d7624 JB |
2996 | struct stat st; |
2997 | int mtime1; | |
32f4334d | 2998 | Lisp_Object handler; |
09121adc | 2999 | struct gcpro gcpro1, gcpro2; |
570d7624 | 3000 | |
b7826503 PJ |
3001 | CHECK_STRING (file1); |
3002 | CHECK_STRING (file2); | |
570d7624 | 3003 | |
199607e4 RS |
3004 | absname1 = Qnil; |
3005 | GCPRO2 (absname1, file2); | |
4b4deea2 TT |
3006 | absname1 = expand_and_dir_to_file (file1, BVAR (current_buffer, directory)); |
3007 | absname2 = expand_and_dir_to_file (file2, BVAR (current_buffer, directory)); | |
09121adc | 3008 | UNGCPRO; |
570d7624 | 3009 | |
32f4334d RS |
3010 | /* If the file name has special constructs in it, |
3011 | call the corresponding file handler. */ | |
199607e4 | 3012 | handler = Ffind_file_name_handler (absname1, Qfile_newer_than_file_p); |
51cf6d37 | 3013 | if (NILP (handler)) |
199607e4 | 3014 | handler = Ffind_file_name_handler (absname2, Qfile_newer_than_file_p); |
32f4334d | 3015 | if (!NILP (handler)) |
199607e4 | 3016 | return call3 (handler, Qfile_newer_than_file_p, absname1, absname2); |
32f4334d | 3017 | |
b1d1b865 RS |
3018 | GCPRO2 (absname1, absname2); |
3019 | absname1 = ENCODE_FILE (absname1); | |
3020 | absname2 = ENCODE_FILE (absname2); | |
3021 | UNGCPRO; | |
3022 | ||
42a5b22f | 3023 | if (stat (SSDATA (absname1), &st) < 0) |
570d7624 JB |
3024 | return Qnil; |
3025 | ||
3026 | mtime1 = st.st_mtime; | |
3027 | ||
42a5b22f | 3028 | if (stat (SSDATA (absname2), &st) < 0) |
570d7624 JB |
3029 | return Qt; |
3030 | ||
3031 | return (mtime1 > st.st_mtime) ? Qt : Qnil; | |
3032 | } | |
3033 | \f | |
6fdaa9a0 KH |
3034 | #ifndef READ_BUF_SIZE |
3035 | #define READ_BUF_SIZE (64 << 10) | |
3036 | #endif | |
3037 | ||
98a7d268 KH |
3038 | /* This function is called after Lisp functions to decide a coding |
3039 | system are called, or when they cause an error. Before they are | |
3040 | called, the current buffer is set unibyte and it contains only a | |
3041 | newly inserted text (thus the buffer was empty before the | |
3042 | insertion). | |
3043 | ||
3044 | The functions may set markers, overlays, text properties, or even | |
3045 | alter the buffer contents, change the current buffer. | |
3046 | ||
3047 | Here, we reset all those changes by: | |
3048 | o set back the current buffer. | |
3049 | o move all markers and overlays to BEG. | |
3050 | o remove all text properties. | |
3051 | o set back the buffer multibyteness. */ | |
f736ffbf KH |
3052 | |
3053 | static Lisp_Object | |
971de7fb | 3054 | decide_coding_unwind (Lisp_Object unwind_data) |
f736ffbf | 3055 | { |
98a7d268 | 3056 | Lisp_Object multibyte, undo_list, buffer; |
f736ffbf | 3057 | |
98a7d268 KH |
3058 | multibyte = XCAR (unwind_data); |
3059 | unwind_data = XCDR (unwind_data); | |
3060 | undo_list = XCAR (unwind_data); | |
3061 | buffer = XCDR (unwind_data); | |
3062 | ||
3063 | if (current_buffer != XBUFFER (buffer)) | |
3064 | set_buffer_internal (XBUFFER (buffer)); | |
3065 | adjust_markers_for_delete (BEG, BEG_BYTE, Z, Z_BYTE); | |
3066 | adjust_overlays_for_delete (BEG, Z - BEG); | |
3067 | BUF_INTERVALS (current_buffer) = 0; | |
3068 | TEMP_SET_PT_BOTH (BEG, BEG_BYTE); | |
3069 | ||
3070 | /* Now we are safe to change the buffer's multibyteness directly. */ | |
4b4deea2 TT |
3071 | BVAR (current_buffer, enable_multibyte_characters) = multibyte; |
3072 | BVAR (current_buffer, undo_list) = undo_list; | |
f736ffbf KH |
3073 | |
3074 | return Qnil; | |
3075 | } | |
3076 | ||
55587f8a | 3077 | |
1b978129 | 3078 | /* Used to pass values from insert-file-contents to read_non_regular. */ |
55587f8a | 3079 | |
1b978129 | 3080 | static int non_regular_fd; |
ae19ba7c SM |
3081 | static EMACS_INT non_regular_inserted; |
3082 | static EMACS_INT non_regular_nbytes; | |
55587f8a | 3083 | |
55587f8a | 3084 | |
1b978129 | 3085 | /* Read from a non-regular file. |
438105ed | 3086 | Read non_regular_nbytes bytes max from non_regular_fd. |
1b978129 GM |
3087 | Non_regular_inserted specifies where to put the read bytes. |
3088 | Value is the number of bytes read. */ | |
55587f8a GM |
3089 | |
3090 | static Lisp_Object | |
9c8a2331 | 3091 | read_non_regular (Lisp_Object ignore) |
55587f8a | 3092 | { |
ae19ba7c | 3093 | EMACS_INT nbytes; |
efdc16c9 | 3094 | |
1b978129 GM |
3095 | immediate_quit = 1; |
3096 | QUIT; | |
3097 | nbytes = emacs_read (non_regular_fd, | |
5976c3fe PE |
3098 | ((char *) BEG_ADDR + PT_BYTE - BEG_BYTE |
3099 | + non_regular_inserted), | |
1b978129 | 3100 | non_regular_nbytes); |
1b978129 GM |
3101 | immediate_quit = 0; |
3102 | return make_number (nbytes); | |
3103 | } | |
55587f8a | 3104 | |
d0e2444e | 3105 | |
1b978129 GM |
3106 | /* Condition-case handler used when reading from non-regular files |
3107 | in insert-file-contents. */ | |
3108 | ||
3109 | static Lisp_Object | |
9c8a2331 | 3110 | read_non_regular_quit (Lisp_Object ignore) |
1b978129 | 3111 | { |
55587f8a GM |
3112 | return Qnil; |
3113 | } | |
3114 | ||
e69dafad PE |
3115 | /* Reposition FD to OFFSET, based on WHENCE. This acts like lseek |
3116 | except that it also tests for OFFSET being out of lseek's range. */ | |
3117 | static off_t | |
3118 | emacs_lseek (int fd, EMACS_INT offset, int whence) | |
3119 | { | |
096a9774 PE |
3120 | /* Use "&" rather than "&&" to suppress a bogus GCC warning; see |
3121 | <http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43772>. */ | |
3122 | if (! ((TYPE_MINIMUM (off_t) <= offset) & (offset <= TYPE_MAXIMUM (off_t)))) | |
e69dafad PE |
3123 | { |
3124 | errno = EINVAL; | |
3125 | return -1; | |
3126 | } | |
3127 | return lseek (fd, offset, whence); | |
3128 | } | |
3129 | ||
55587f8a | 3130 | |
570d7624 | 3131 | DEFUN ("insert-file-contents", Finsert_file_contents, Sinsert_file_contents, |
8c1a1077 PJ |
3132 | 1, 5, 0, |
3133 | doc: /* Insert contents of file FILENAME after point. | |
cf6d2357 | 3134 | Returns list of absolute file name and number of characters inserted. |
6f2528d8 MR |
3135 | If second argument VISIT is non-nil, the buffer's visited filename and |
3136 | last save file modtime are set, and it is marked unmodified. If | |
3137 | visiting and the file does not exist, visiting is completed before the | |
3138 | error is signaled. | |
3139 | ||
3140 | The optional third and fourth arguments BEG and END specify what portion | |
3141 | of the file to insert. These arguments count bytes in the file, not | |
3142 | characters in the buffer. If VISIT is non-nil, BEG and END must be nil. | |
3143 | ||
3144 | If optional fifth argument REPLACE is non-nil, replace the current | |
3145 | buffer contents (in the accessible portion) with the file contents. | |
3146 | This is better than simply deleting and inserting the whole thing | |
3147 | because (1) it preserves some marker positions and (2) it puts less data | |
3148 | in the undo list. When REPLACE is non-nil, the second return value is | |
3149 | the number of characters that replace previous buffer contents. | |
3150 | ||
3151 | This function does code conversion according to the value of | |
3152 | `coding-system-for-read' or `file-coding-system-alist', and sets the | |
3153 | variable `last-coding-system-used' to the coding system actually used. */) | |
5842a27b | 3154 | (Lisp_Object filename, Lisp_Object visit, Lisp_Object beg, Lisp_Object end, Lisp_Object replace) |
570d7624 JB |
3155 | { |
3156 | struct stat st; | |
3157 | register int fd; | |
ae19ba7c | 3158 | EMACS_INT inserted = 0; |
18a9f8d9 | 3159 | int nochange = 0; |
ae19ba7c SM |
3160 | register EMACS_INT how_much; |
3161 | register EMACS_INT unprocessed; | |
331379bf | 3162 | int count = SPECPDL_INDEX (); |
6f2528d8 MR |
3163 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4, gcpro5; |
3164 | Lisp_Object handler, val, insval, orig_filename, old_undo; | |
d6a3cc15 | 3165 | Lisp_Object p; |
ae19ba7c | 3166 | EMACS_INT total = 0; |
53c34c46 | 3167 | int not_regular = 0; |
5976c3fe | 3168 | char read_buf[READ_BUF_SIZE]; |
6fdaa9a0 | 3169 | struct coding_system coding; |
5976c3fe | 3170 | char buffer[1 << 14]; |
727a0b4a | 3171 | int replace_handled = 0; |
ec7adf26 | 3172 | int set_coding_system = 0; |
db327c7e | 3173 | Lisp_Object coding_system; |
1b978129 | 3174 | int read_quit = 0; |
490ee853 | 3175 | Lisp_Object old_Vdeactivate_mark = Vdeactivate_mark; |
68780e2a | 3176 | int we_locked_file = 0; |
db65a627 | 3177 | int deferred_remove_unwind_protect = 0; |
32f4334d | 3178 | |
95385625 RS |
3179 | if (current_buffer->base_buffer && ! NILP (visit)) |
3180 | error ("Cannot do file visiting in an indirect buffer"); | |
3181 | ||
4b4deea2 | 3182 | if (!NILP (BVAR (current_buffer, read_only))) |
95385625 RS |
3183 | Fbarf_if_buffer_read_only (); |
3184 | ||
32f4334d | 3185 | val = Qnil; |
d6a3cc15 | 3186 | p = Qnil; |
b1d1b865 | 3187 | orig_filename = Qnil; |
6f2528d8 | 3188 | old_undo = Qnil; |
32f4334d | 3189 | |
6f2528d8 | 3190 | GCPRO5 (filename, val, p, orig_filename, old_undo); |
570d7624 | 3191 | |
b7826503 | 3192 | CHECK_STRING (filename); |
570d7624 JB |
3193 | filename = Fexpand_file_name (filename, Qnil); |
3194 | ||
1c157f8d KH |
3195 | /* The value Qnil means that the coding system is not yet |
3196 | decided. */ | |
3197 | coding_system = Qnil; | |
3198 | ||
32f4334d RS |
3199 | /* If the file name has special constructs in it, |
3200 | call the corresponding file handler. */ | |
49307295 | 3201 | handler = Ffind_file_name_handler (filename, Qinsert_file_contents); |
32f4334d RS |
3202 | if (!NILP (handler)) |
3203 | { | |
3d0387c0 RS |
3204 | val = call6 (handler, Qinsert_file_contents, filename, |
3205 | visit, beg, end, replace); | |
03699b14 KR |
3206 | if (CONSP (val) && CONSP (XCDR (val))) |
3207 | inserted = XINT (XCAR (XCDR (val))); | |
32f4334d RS |
3208 | goto handled; |
3209 | } | |
3210 | ||
b1d1b865 RS |
3211 | orig_filename = filename; |
3212 | filename = ENCODE_FILE (filename); | |
3213 | ||
570d7624 JB |
3214 | fd = -1; |
3215 | ||
c1c4693e RS |
3216 | #ifdef WINDOWSNT |
3217 | { | |
3218 | Lisp_Object tem = Vw32_get_true_file_attributes; | |
3219 | ||
3220 | /* Tell stat to use expensive method to get accurate info. */ | |
3221 | Vw32_get_true_file_attributes = Qt; | |
42a5b22f | 3222 | total = stat (SSDATA (filename), &st); |
c1c4693e RS |
3223 | Vw32_get_true_file_attributes = tem; |
3224 | } | |
3225 | if (total < 0) | |
3226 | #else | |
42a5b22f | 3227 | if (stat (SSDATA (filename), &st) < 0) |
c1c4693e | 3228 | #endif /* WINDOWSNT */ |
570d7624 | 3229 | { |
99bc28f4 | 3230 | badopen: |
265a9e55 | 3231 | if (NILP (visit)) |
b1d1b865 | 3232 | report_file_error ("Opening input file", Fcons (orig_filename, Qnil)); |
570d7624 JB |
3233 | st.st_mtime = -1; |
3234 | how_much = 0; | |
0de6b8f4 | 3235 | if (!NILP (Vcoding_system_for_read)) |
22d92d6b | 3236 | Fset (Qbuffer_file_coding_system, Vcoding_system_for_read); |
570d7624 JB |
3237 | goto notfound; |
3238 | } | |
3239 | ||
be53b411 JB |
3240 | /* This code will need to be changed in order to work on named |
3241 | pipes, and it's probably just not worth it. So we should at | |
3242 | least signal an error. */ | |
99bc28f4 | 3243 | if (!S_ISREG (st.st_mode)) |
330bfe57 | 3244 | { |
d4b8687b RS |
3245 | not_regular = 1; |
3246 | ||
3247 | if (! NILP (visit)) | |
3248 | goto notfound; | |
3249 | ||
3250 | if (! NILP (replace) || ! NILP (beg) || ! NILP (end)) | |
24b1ddad KS |
3251 | xsignal2 (Qfile_error, |
3252 | build_string ("not a regular file"), orig_filename); | |
330bfe57 | 3253 | } |
be53b411 | 3254 | |
99bc28f4 | 3255 | if (fd < 0) |
42a5b22f | 3256 | if ((fd = emacs_open (SSDATA (filename), O_RDONLY, 0)) < 0) |
99bc28f4 KH |
3257 | goto badopen; |
3258 | ||
3259 | /* Replacement should preserve point as it preserves markers. */ | |
3260 | if (!NILP (replace)) | |
3261 | record_unwind_protect (restore_point_unwind, Fpoint_marker ()); | |
3262 | ||
3263 | record_unwind_protect (close_file_unwind, make_number (fd)); | |
3264 | ||
2a47c44d | 3265 | |
15cbd324 EZ |
3266 | /* Check whether the size is too large or negative, which can happen on a |
3267 | platform that allows file sizes greater than the maximum off_t value. */ | |
2a47c44d | 3268 | if (! not_regular |
d1f3d2af | 3269 | && ! (0 <= st.st_size && st.st_size <= BUF_BYTES_MAX)) |
99561444 | 3270 | buffer_overflow (); |
be53b411 | 3271 | |
9c856db9 GM |
3272 | /* Prevent redisplay optimizations. */ |
3273 | current_buffer->clip_changed = 1; | |
3274 | ||
9f57b6b4 KH |
3275 | if (!NILP (visit)) |
3276 | { | |
3277 | if (!NILP (beg) || !NILP (end)) | |
3278 | error ("Attempt to visit less than an entire file"); | |
3279 | if (BEG < Z && NILP (replace)) | |
3280 | error ("Cannot do file visiting in a non-empty buffer"); | |
3281 | } | |
7fded690 JB |
3282 | |
3283 | if (!NILP (beg)) | |
b7826503 | 3284 | CHECK_NUMBER (beg); |
7fded690 | 3285 | else |
2acfd7ae | 3286 | XSETFASTINT (beg, 0); |
7fded690 JB |
3287 | |
3288 | if (!NILP (end)) | |
b7826503 | 3289 | CHECK_NUMBER (end); |
7fded690 JB |
3290 | else |
3291 | { | |
d4b8687b RS |
3292 | if (! not_regular) |
3293 | { | |
3294 | XSETINT (end, st.st_size); | |
68c45bf0 | 3295 | |
d21dd12d GM |
3296 | /* The file size returned from stat may be zero, but data |
3297 | may be readable nonetheless, for example when this is a | |
3298 | file in the /proc filesystem. */ | |
3299 | if (st.st_size == 0) | |
3300 | XSETINT (end, READ_BUF_SIZE); | |
d4b8687b | 3301 | } |
7fded690 JB |
3302 | } |
3303 | ||
356a6224 | 3304 | if (EQ (Vcoding_system_for_read, Qauto_save_coding)) |
5560aecd | 3305 | { |
75421805 | 3306 | coding_system = coding_inherit_eol_type (Qutf_8_emacs, Qunix); |
5560aecd KH |
3307 | setup_coding_system (coding_system, &coding); |
3308 | /* Ensure we set Vlast_coding_system_used. */ | |
3309 | set_coding_system = 1; | |
3310 | } | |
356a6224 | 3311 | else if (BEG < Z) |
f736ffbf KH |
3312 | { |
3313 | /* Decide the coding system to use for reading the file now | |
3314 | because we can't use an optimized method for handling | |
3315 | `coding:' tag if the current buffer is not empty. */ | |
f736ffbf | 3316 | if (!NILP (Vcoding_system_for_read)) |
db327c7e | 3317 | coding_system = Vcoding_system_for_read; |
f736ffbf KH |
3318 | else |
3319 | { | |
3320 | /* Don't try looking inside a file for a coding system | |
3321 | specification if it is not seekable. */ | |
3322 | if (! not_regular && ! NILP (Vset_auto_coding_function)) | |
3323 | { | |
3324 | /* Find a coding system specified in the heading two | |
3325 | lines or in the tailing several lines of the file. | |
3326 | We assume that the 1K-byte and 3K-byte for heading | |
003a7eaa | 3327 | and tailing respectively are sufficient for this |
f736ffbf | 3328 | purpose. */ |
ae19ba7c | 3329 | EMACS_INT nread; |
f736ffbf KH |
3330 | |
3331 | if (st.st_size <= (1024 * 4)) | |
68c45bf0 | 3332 | nread = emacs_read (fd, read_buf, 1024 * 4); |
f736ffbf KH |
3333 | else |
3334 | { | |
68c45bf0 | 3335 | nread = emacs_read (fd, read_buf, 1024); |
f736ffbf KH |
3336 | if (nread >= 0) |
3337 | { | |
e69dafad | 3338 | if (lseek (fd, st.st_size - (1024 * 3), SEEK_SET) < 0) |
f736ffbf KH |
3339 | report_file_error ("Setting file position", |
3340 | Fcons (orig_filename, Qnil)); | |
68c45bf0 | 3341 | nread += emacs_read (fd, read_buf + nread, 1024 * 3); |
f736ffbf KH |
3342 | } |
3343 | } | |
feb9dc27 | 3344 | |
f736ffbf KH |
3345 | if (nread < 0) |
3346 | error ("IO error reading %s: %s", | |
d5db4077 | 3347 | SDATA (orig_filename), emacs_strerror (errno)); |
f736ffbf KH |
3348 | else if (nread > 0) |
3349 | { | |
f736ffbf | 3350 | struct buffer *prev = current_buffer; |
f839df0c | 3351 | Lisp_Object workbuf; |
685fc579 | 3352 | struct buffer *buf; |
f736ffbf KH |
3353 | |
3354 | record_unwind_protect (Fset_buffer, Fcurrent_buffer ()); | |
1d92afcd | 3355 | |
f839df0c PE |
3356 | workbuf = Fget_buffer_create (build_string (" *code-converting-work*")); |
3357 | buf = XBUFFER (workbuf); | |
685fc579 | 3358 | |
29ea8ae9 | 3359 | delete_all_overlays (buf); |
4b4deea2 TT |
3360 | BVAR (buf, directory) = BVAR (current_buffer, directory); |
3361 | BVAR (buf, read_only) = Qnil; | |
3362 | BVAR (buf, filename) = Qnil; | |
3363 | BVAR (buf, undo_list) = Qt; | |
29ea8ae9 SM |
3364 | eassert (buf->overlays_before == NULL); |
3365 | eassert (buf->overlays_after == NULL); | |
efdc16c9 | 3366 | |
685fc579 RS |
3367 | set_buffer_internal (buf); |
3368 | Ferase_buffer (); | |
4b4deea2 | 3369 | BVAR (buf, enable_multibyte_characters) = Qnil; |
685fc579 | 3370 | |
b68864e5 | 3371 | insert_1_both ((char *) read_buf, nread, nread, 0, 0, 0); |
f736ffbf | 3372 | TEMP_SET_PT_BOTH (BEG, BEG_BYTE); |
db327c7e | 3373 | coding_system = call2 (Vset_auto_coding_function, |
8f924df7 | 3374 | filename, make_number (nread)); |
f736ffbf | 3375 | set_buffer_internal (prev); |
efdc16c9 | 3376 | |
f736ffbf KH |
3377 | /* Discard the unwind protect for recovering the |
3378 | current buffer. */ | |
3379 | specpdl_ptr--; | |
3380 | ||
3381 | /* Rewind the file for the actual read done later. */ | |
e69dafad | 3382 | if (lseek (fd, 0, SEEK_SET) < 0) |
f736ffbf KH |
3383 | report_file_error ("Setting file position", |
3384 | Fcons (orig_filename, Qnil)); | |
3385 | } | |
3386 | } | |
feb9dc27 | 3387 | |
db327c7e | 3388 | if (NILP (coding_system)) |
f736ffbf KH |
3389 | { |
3390 | /* If we have not yet decided a coding system, check | |
3391 | file-coding-system-alist. */ | |
8f924df7 | 3392 | Lisp_Object args[6]; |
f736ffbf KH |
3393 | |
3394 | args[0] = Qinsert_file_contents, args[1] = orig_filename; | |
3395 | args[2] = visit, args[3] = beg, args[4] = end, args[5] = replace; | |
8f924df7 KH |
3396 | coding_system = Ffind_operation_coding_system (6, args); |
3397 | if (CONSP (coding_system)) | |
3398 | coding_system = XCAR (coding_system); | |
f736ffbf KH |
3399 | } |
3400 | } | |
c9e82392 | 3401 | |
db327c7e KH |
3402 | if (NILP (coding_system)) |
3403 | coding_system = Qundecided; | |
3404 | else | |
3405 | CHECK_CODING_SYSTEM (coding_system); | |
c8a6d68a | 3406 | |
4b4deea2 | 3407 | if (NILP (BVAR (current_buffer, enable_multibyte_characters))) |
237a6fd2 RS |
3408 | /* We must suppress all character code conversion except for |
3409 | end-of-line conversion. */ | |
db327c7e | 3410 | coding_system = raw_text_coding_system (coding_system); |
54369368 | 3411 | |
db327c7e KH |
3412 | setup_coding_system (coding_system, &coding); |
3413 | /* Ensure we set Vlast_coding_system_used. */ | |
3414 | set_coding_system = 1; | |
f736ffbf | 3415 | } |
6cf71bf1 | 3416 | |
3d0387c0 RS |
3417 | /* If requested, replace the accessible part of the buffer |
3418 | with the file contents. Avoid replacing text at the | |
3419 | beginning or end of the buffer that matches the file contents; | |
3dbcf3f6 RS |
3420 | that preserves markers pointing to the unchanged parts. |
3421 | ||
3422 | Here we implement this feature in an optimized way | |
3423 | for the case where code conversion is NOT needed. | |
3424 | The following if-statement handles the case of conversion | |
727a0b4a RS |
3425 | in a less optimal way. |
3426 | ||
3427 | If the code conversion is "automatic" then we try using this | |
3428 | method and hope for the best. | |
3429 | But if we discover the need for conversion, we give up on this method | |
3430 | and let the following if-statement handle the replace job. */ | |
3dbcf3f6 | 3431 | if (!NILP (replace) |
f736ffbf | 3432 | && BEGV < ZV |
db327c7e KH |
3433 | && (NILP (coding_system) |
3434 | || ! CODING_REQUIRE_DECODING (&coding))) | |
3d0387c0 | 3435 | { |
ec7adf26 RS |
3436 | /* same_at_start and same_at_end count bytes, |
3437 | because file access counts bytes | |
3438 | and BEG and END count bytes. */ | |
ae19ba7c SM |
3439 | EMACS_INT same_at_start = BEGV_BYTE; |
3440 | EMACS_INT same_at_end = ZV_BYTE; | |
3441 | EMACS_INT overlap; | |
6fdaa9a0 KH |
3442 | /* There is still a possibility we will find the need to do code |
3443 | conversion. If that happens, we set this variable to 1 to | |
727a0b4a | 3444 | give up on handling REPLACE in the optimized way. */ |
6fdaa9a0 | 3445 | int giveup_match_end = 0; |
9c28748f | 3446 | |
4d2a0879 RS |
3447 | if (XINT (beg) != 0) |
3448 | { | |
e69dafad | 3449 | if (emacs_lseek (fd, XINT (beg), SEEK_SET) < 0) |
4d2a0879 | 3450 | report_file_error ("Setting file position", |
b1d1b865 | 3451 | Fcons (orig_filename, Qnil)); |
4d2a0879 RS |
3452 | } |
3453 | ||
3d0387c0 RS |
3454 | immediate_quit = 1; |
3455 | QUIT; | |
3456 | /* Count how many chars at the start of the file | |
3457 | match the text at the beginning of the buffer. */ | |
3458 | while (1) | |
3459 | { | |
ae19ba7c | 3460 | EMACS_INT nread, bufpos; |
3d0387c0 | 3461 | |
68c45bf0 | 3462 | nread = emacs_read (fd, buffer, sizeof buffer); |
3d0387c0 RS |
3463 | if (nread < 0) |
3464 | error ("IO error reading %s: %s", | |
5976c3fe | 3465 | SSDATA (orig_filename), emacs_strerror (errno)); |
3d0387c0 RS |
3466 | else if (nread == 0) |
3467 | break; | |
6fdaa9a0 | 3468 | |
db327c7e | 3469 | if (CODING_REQUIRE_DETECTION (&coding)) |
727a0b4a | 3470 | { |
5976c3fe PE |
3471 | coding_system = detect_coding_system ((unsigned char *) buffer, |
3472 | nread, nread, 1, 0, | |
db327c7e KH |
3473 | coding_system); |
3474 | setup_coding_system (coding_system, &coding); | |
727a0b4a RS |
3475 | } |
3476 | ||
db327c7e KH |
3477 | if (CODING_REQUIRE_DECODING (&coding)) |
3478 | /* We found that the file should be decoded somehow. | |
727a0b4a RS |
3479 | Let's give up here. */ |
3480 | { | |
3481 | giveup_match_end = 1; | |
3482 | break; | |
3483 | } | |
3484 | ||
3d0387c0 | 3485 | bufpos = 0; |
ec7adf26 | 3486 | while (bufpos < nread && same_at_start < ZV_BYTE |
6fdaa9a0 | 3487 | && FETCH_BYTE (same_at_start) == buffer[bufpos]) |
3d0387c0 RS |
3488 | same_at_start++, bufpos++; |
3489 | /* If we found a discrepancy, stop the scan. | |
8e6208c5 | 3490 | Otherwise loop around and scan the next bufferful. */ |
3d0387c0 RS |
3491 | if (bufpos != nread) |
3492 | break; | |
3493 | } | |
3494 | immediate_quit = 0; | |
3495 | /* If the file matches the buffer completely, | |
3496 | there's no need to replace anything. */ | |
ec7adf26 | 3497 | if (same_at_start - BEGV_BYTE == XINT (end)) |
3d0387c0 | 3498 | { |
68c45bf0 | 3499 | emacs_close (fd); |
a1d2b64a | 3500 | specpdl_ptr--; |
1051b3b3 | 3501 | /* Truncate the buffer to the size of the file. */ |
7dae4502 | 3502 | del_range_1 (same_at_start, same_at_end, 0, 0); |
3d0387c0 RS |
3503 | goto handled; |
3504 | } | |
3505 | immediate_quit = 1; | |
3506 | QUIT; | |
3507 | /* Count how many chars at the end of the file | |
6fdaa9a0 KH |
3508 | match the text at the end of the buffer. But, if we have |
3509 | already found that decoding is necessary, don't waste time. */ | |
3510 | while (!giveup_match_end) | |
3d0387c0 | 3511 | { |
ae19ba7c | 3512 | EMACS_INT total_read, nread, bufpos, curpos, trial; |
3d0387c0 RS |
3513 | |
3514 | /* At what file position are we now scanning? */ | |
ec7adf26 | 3515 | curpos = XINT (end) - (ZV_BYTE - same_at_end); |
fc81fa9e KH |
3516 | /* If the entire file matches the buffer tail, stop the scan. */ |
3517 | if (curpos == 0) | |
3518 | break; | |
3d0387c0 RS |
3519 | /* How much can we scan in the next step? */ |
3520 | trial = min (curpos, sizeof buffer); | |
e69dafad | 3521 | if (emacs_lseek (fd, curpos - trial, SEEK_SET) < 0) |
3d0387c0 | 3522 | report_file_error ("Setting file position", |
b1d1b865 | 3523 | Fcons (orig_filename, Qnil)); |
3d0387c0 | 3524 | |
b02439c8 | 3525 | total_read = nread = 0; |
3d0387c0 RS |
3526 | while (total_read < trial) |
3527 | { | |
68c45bf0 | 3528 | nread = emacs_read (fd, buffer + total_read, trial - total_read); |
2bd2273e | 3529 | if (nread < 0) |
3d0387c0 | 3530 | error ("IO error reading %s: %s", |
d5db4077 | 3531 | SDATA (orig_filename), emacs_strerror (errno)); |
2bd2273e GM |
3532 | else if (nread == 0) |
3533 | break; | |
3d0387c0 RS |
3534 | total_read += nread; |
3535 | } | |
efdc16c9 | 3536 | |
8e6208c5 | 3537 | /* Scan this bufferful from the end, comparing with |
3d0387c0 RS |
3538 | the Emacs buffer. */ |
3539 | bufpos = total_read; | |
efdc16c9 | 3540 | |
3d0387c0 RS |
3541 | /* Compare with same_at_start to avoid counting some buffer text |
3542 | as matching both at the file's beginning and at the end. */ | |
3543 | while (bufpos > 0 && same_at_end > same_at_start | |
6fdaa9a0 | 3544 | && FETCH_BYTE (same_at_end - 1) == buffer[bufpos - 1]) |
3d0387c0 | 3545 | same_at_end--, bufpos--; |
727a0b4a | 3546 | |
3d0387c0 | 3547 | /* If we found a discrepancy, stop the scan. |
8e6208c5 | 3548 | Otherwise loop around and scan the preceding bufferful. */ |
3d0387c0 | 3549 | if (bufpos != 0) |
727a0b4a RS |
3550 | { |
3551 | /* If this discrepancy is because of code conversion, | |
3552 | we cannot use this method; giveup and try the other. */ | |
3553 | if (same_at_end > same_at_start | |
3554 | && FETCH_BYTE (same_at_end - 1) >= 0200 | |
4b4deea2 | 3555 | && ! NILP (BVAR (current_buffer, enable_multibyte_characters)) |
c8a6d68a | 3556 | && (CODING_MAY_REQUIRE_DECODING (&coding))) |
727a0b4a RS |
3557 | giveup_match_end = 1; |
3558 | break; | |
3559 | } | |
b02439c8 GM |
3560 | |
3561 | if (nread == 0) | |
3562 | break; | |
3d0387c0 RS |
3563 | } |
3564 | immediate_quit = 0; | |
9c28748f | 3565 | |
727a0b4a RS |
3566 | if (! giveup_match_end) |
3567 | { | |
ae19ba7c | 3568 | EMACS_INT temp; |
ec7adf26 | 3569 | |
727a0b4a | 3570 | /* We win! We can handle REPLACE the optimized way. */ |
9c28748f | 3571 | |
20f6783d RS |
3572 | /* Extend the start of non-matching text area to multibyte |
3573 | character boundary. */ | |
4b4deea2 | 3574 | if (! NILP (BVAR (current_buffer, enable_multibyte_characters))) |
20f6783d RS |
3575 | while (same_at_start > BEGV_BYTE |
3576 | && ! CHAR_HEAD_P (FETCH_BYTE (same_at_start))) | |
3577 | same_at_start--; | |
3578 | ||
3579 | /* Extend the end of non-matching text area to multibyte | |
71312b68 | 3580 | character boundary. */ |
4b4deea2 | 3581 | if (! NILP (BVAR (current_buffer, enable_multibyte_characters))) |
ec7adf26 RS |
3582 | while (same_at_end < ZV_BYTE |
3583 | && ! CHAR_HEAD_P (FETCH_BYTE (same_at_end))) | |
71312b68 RS |
3584 | same_at_end++; |
3585 | ||
727a0b4a | 3586 | /* Don't try to reuse the same piece of text twice. */ |
ec7adf26 RS |
3587 | overlap = (same_at_start - BEGV_BYTE |
3588 | - (same_at_end + st.st_size - ZV)); | |
727a0b4a RS |
3589 | if (overlap > 0) |
3590 | same_at_end += overlap; | |
9c28748f | 3591 | |
727a0b4a | 3592 | /* Arrange to read only the nonmatching middle part of the file. */ |
ec7adf26 RS |
3593 | XSETFASTINT (beg, XINT (beg) + (same_at_start - BEGV_BYTE)); |
3594 | XSETFASTINT (end, XINT (end) - (ZV_BYTE - same_at_end)); | |
3dbcf3f6 | 3595 | |
ec7adf26 | 3596 | del_range_byte (same_at_start, same_at_end, 0); |
727a0b4a | 3597 | /* Insert from the file at the proper position. */ |
ec7adf26 RS |
3598 | temp = BYTE_TO_CHAR (same_at_start); |
3599 | SET_PT_BOTH (temp, same_at_start); | |
727a0b4a RS |
3600 | |
3601 | /* If display currently starts at beginning of line, | |
3602 | keep it that way. */ | |
3603 | if (XBUFFER (XWINDOW (selected_window)->buffer) == current_buffer) | |
3604 | XWINDOW (selected_window)->start_at_line_beg = Fbolp (); | |
3605 | ||
3606 | replace_handled = 1; | |
3607 | } | |
3dbcf3f6 RS |
3608 | } |
3609 | ||
3610 | /* If requested, replace the accessible part of the buffer | |
3611 | with the file contents. Avoid replacing text at the | |
3612 | beginning or end of the buffer that matches the file contents; | |
3613 | that preserves markers pointing to the unchanged parts. | |
3614 | ||
3615 | Here we implement this feature for the case where code conversion | |
3616 | is needed, in a simple way that needs a lot of memory. | |
3617 | The preceding if-statement handles the case of no conversion | |
3618 | in a more optimized way. */ | |
f736ffbf | 3619 | if (!NILP (replace) && ! replace_handled && BEGV < ZV) |
3dbcf3f6 | 3620 | { |
13818c30 SM |
3621 | EMACS_INT same_at_start = BEGV_BYTE; |
3622 | EMACS_INT same_at_end = ZV_BYTE; | |
3623 | EMACS_INT same_at_start_charpos; | |
3624 | EMACS_INT inserted_chars; | |
3625 | EMACS_INT overlap; | |
3626 | EMACS_INT bufpos; | |
db327c7e | 3627 | unsigned char *decoded; |
ae19ba7c | 3628 | EMACS_INT temp; |
43aae36e | 3629 | EMACS_INT this = 0; |
8f924df7 | 3630 | int this_count = SPECPDL_INDEX (); |
4b4deea2 | 3631 | int multibyte = ! NILP (BVAR (current_buffer, enable_multibyte_characters)); |
5b359650 | 3632 | Lisp_Object conversion_buffer; |
db327c7e | 3633 | |
5b359650 | 3634 | conversion_buffer = code_conversion_save (1, multibyte); |
3dbcf3f6 RS |
3635 | |
3636 | /* First read the whole file, performing code conversion into | |
3637 | CONVERSION_BUFFER. */ | |
3638 | ||
e69dafad | 3639 | if (emacs_lseek (fd, XINT (beg), SEEK_SET) < 0) |
8f924df7 KH |
3640 | report_file_error ("Setting file position", |
3641 | Fcons (orig_filename, Qnil)); | |
727a0b4a | 3642 | |
3dbcf3f6 RS |
3643 | total = st.st_size; /* Total bytes in the file. */ |
3644 | how_much = 0; /* Bytes read from file so far. */ | |
3645 | inserted = 0; /* Bytes put into CONVERSION_BUFFER so far. */ | |
3646 | unprocessed = 0; /* Bytes not processed in previous loop. */ | |
3647 | ||
2ba48777 | 3648 | GCPRO1 (conversion_buffer); |
3dbcf3f6 RS |
3649 | while (how_much < total) |
3650 | { | |
db327c7e KH |
3651 | /* We read one bunch by one (READ_BUF_SIZE bytes) to allow |
3652 | quitting while reading a huge while. */ | |
3dbcf3f6 | 3653 | /* try is reserved in some compilers (Microsoft C) */ |
ae19ba7c SM |
3654 | EMACS_INT trytry = min (total - how_much, |
3655 | READ_BUF_SIZE - unprocessed); | |
3dbcf3f6 RS |
3656 | |
3657 | /* Allow quitting out of the actual I/O. */ | |
3658 | immediate_quit = 1; | |
3659 | QUIT; | |
db327c7e | 3660 | this = emacs_read (fd, read_buf + unprocessed, trytry); |
3dbcf3f6 RS |
3661 | immediate_quit = 0; |
3662 | ||
db327c7e | 3663 | if (this <= 0) |
43aae36e | 3664 | break; |
3dbcf3f6 RS |
3665 | |
3666 | how_much += this; | |
3667 | ||
bf1c0f27 SM |
3668 | BUF_TEMP_SET_PT (XBUFFER (conversion_buffer), |
3669 | BUF_Z (XBUFFER (conversion_buffer))); | |
5976c3fe PE |
3670 | decode_coding_c_string (&coding, (unsigned char *) read_buf, |
3671 | unprocessed + this, conversion_buffer); | |
db327c7e KH |
3672 | unprocessed = coding.carryover_bytes; |
3673 | if (coding.carryover_bytes > 0) | |
72af86bd | 3674 | memcpy (read_buf, coding.carryover, unprocessed); |
3dbcf3f6 | 3675 | } |
2ba48777 | 3676 | UNGCPRO; |
db327c7e | 3677 | emacs_close (fd); |
3dbcf3f6 | 3678 | |
db65a627 CY |
3679 | /* We should remove the unwind_protect calling |
3680 | close_file_unwind, but other stuff has been added the stack, | |
3681 | so defer the removal till we reach the `handled' label. */ | |
3682 | deferred_remove_unwind_protect = 1; | |
3683 | ||
db327c7e KH |
3684 | /* At this point, HOW_MUCH should equal TOTAL, or should be <= 0 |
3685 | if we couldn't read the file. */ | |
3dbcf3f6 | 3686 | |
43aae36e | 3687 | if (this < 0) |
4ed925c6 MB |
3688 | error ("IO error reading %s: %s", |
3689 | SDATA (orig_filename), emacs_strerror (errno)); | |
3dbcf3f6 | 3690 | |
db327c7e KH |
3691 | if (unprocessed > 0) |
3692 | { | |
3693 | coding.mode |= CODING_MODE_LAST_BLOCK; | |
5976c3fe PE |
3694 | decode_coding_c_string (&coding, (unsigned char *) read_buf, |
3695 | unprocessed, conversion_buffer); | |
db327c7e KH |
3696 | coding.mode &= ~CODING_MODE_LAST_BLOCK; |
3697 | } | |
3698 | ||
50b06221 | 3699 | coding_system = CODING_ID_NAME (coding.id); |
f6a07420 | 3700 | set_coding_system = 1; |
db327c7e | 3701 | decoded = BUF_BEG_ADDR (XBUFFER (conversion_buffer)); |
50342b35 KH |
3702 | inserted = (BUF_Z_BYTE (XBUFFER (conversion_buffer)) |
3703 | - BUF_BEG_BYTE (XBUFFER (conversion_buffer))); | |
db327c7e KH |
3704 | |
3705 | /* Compare the beginning of the converted string with the buffer | |
3706 | text. */ | |
3dbcf3f6 RS |
3707 | |
3708 | bufpos = 0; | |
3709 | while (bufpos < inserted && same_at_start < same_at_end | |
db327c7e | 3710 | && FETCH_BYTE (same_at_start) == decoded[bufpos]) |
3dbcf3f6 RS |
3711 | same_at_start++, bufpos++; |
3712 | ||
db327c7e | 3713 | /* If the file matches the head of buffer completely, |
3dbcf3f6 RS |
3714 | there's no need to replace anything. */ |
3715 | ||
3716 | if (bufpos == inserted) | |
3717 | { | |
3dbcf3f6 | 3718 | /* Truncate the buffer to the size of the file. */ |
18a9f8d9 SM |
3719 | if (same_at_start == same_at_end) |
3720 | nochange = 1; | |
3721 | else | |
3722 | del_range_byte (same_at_start, same_at_end, 0); | |
427f5aab | 3723 | inserted = 0; |
e8553dd1 KH |
3724 | |
3725 | unbind_to (this_count, Qnil); | |
3dbcf3f6 RS |
3726 | goto handled; |
3727 | } | |
3728 | ||
db327c7e KH |
3729 | /* Extend the start of non-matching text area to the previous |
3730 | multibyte character boundary. */ | |
4b4deea2 | 3731 | if (! NILP (BVAR (current_buffer, enable_multibyte_characters))) |
20f6783d RS |
3732 | while (same_at_start > BEGV_BYTE |
3733 | && ! CHAR_HEAD_P (FETCH_BYTE (same_at_start))) | |
3734 | same_at_start--; | |
3735 | ||
3dbcf3f6 RS |
3736 | /* Scan this bufferful from the end, comparing with |
3737 | the Emacs buffer. */ | |
3738 | bufpos = inserted; | |
3739 | ||
3740 | /* Compare with same_at_start to avoid counting some buffer text | |
3741 | as matching both at the file's beginning and at the end. */ | |
3742 | while (bufpos > 0 && same_at_end > same_at_start | |
db327c7e | 3743 | && FETCH_BYTE (same_at_end - 1) == decoded[bufpos - 1]) |
3dbcf3f6 RS |
3744 | same_at_end--, bufpos--; |
3745 | ||
db327c7e KH |
3746 | /* Extend the end of non-matching text area to the next |
3747 | multibyte character boundary. */ | |
4b4deea2 | 3748 | if (! NILP (BVAR (current_buffer, enable_multibyte_characters))) |
20f6783d RS |
3749 | while (same_at_end < ZV_BYTE |
3750 | && ! CHAR_HEAD_P (FETCH_BYTE (same_at_end))) | |
3751 | same_at_end++; | |
3752 | ||
3dbcf3f6 | 3753 | /* Don't try to reuse the same piece of text twice. */ |
ec7adf26 | 3754 | overlap = same_at_start - BEGV_BYTE - (same_at_end + inserted - ZV_BYTE); |
3dbcf3f6 RS |
3755 | if (overlap > 0) |
3756 | same_at_end += overlap; | |
3757 | ||
727a0b4a RS |
3758 | /* If display currently starts at beginning of line, |
3759 | keep it that way. */ | |
3760 | if (XBUFFER (XWINDOW (selected_window)->buffer) == current_buffer) | |
3761 | XWINDOW (selected_window)->start_at_line_beg = Fbolp (); | |
3762 | ||
3dbcf3f6 RS |
3763 | /* Replace the chars that we need to replace, |
3764 | and update INSERTED to equal the number of bytes | |
db327c7e | 3765 | we are taking from the decoded string. */ |
4b70e2c9 | 3766 | inserted -= (ZV_BYTE - same_at_end) + (same_at_start - BEGV_BYTE); |
427f5aab | 3767 | |
643c73b9 | 3768 | if (same_at_end != same_at_start) |
427f5aab KH |
3769 | { |
3770 | del_range_byte (same_at_start, same_at_end, 0); | |
3771 | temp = GPT; | |
3772 | same_at_start = GPT_BYTE; | |
3773 | } | |
643c73b9 RS |
3774 | else |
3775 | { | |
643c73b9 | 3776 | temp = BYTE_TO_CHAR (same_at_start); |
643c73b9 | 3777 | } |
427f5aab KH |
3778 | /* Insert from the file at the proper position. */ |
3779 | SET_PT_BOTH (temp, same_at_start); | |
50342b35 KH |
3780 | same_at_start_charpos |
3781 | = buf_bytepos_to_charpos (XBUFFER (conversion_buffer), | |
7f5d2c72 SM |
3782 | same_at_start - BEGV_BYTE |
3783 | + BUF_BEG_BYTE (XBUFFER (conversion_buffer))); | |
50342b35 KH |
3784 | inserted_chars |
3785 | = (buf_bytepos_to_charpos (XBUFFER (conversion_buffer), | |
7f5d2c72 SM |
3786 | same_at_start + inserted - BEGV_BYTE |
3787 | + BUF_BEG_BYTE (XBUFFER (conversion_buffer))) | |
50342b35 | 3788 | - same_at_start_charpos); |
d07af40d KH |
3789 | /* This binding is to avoid ask-user-about-supersession-threat |
3790 | being called in insert_from_buffer (via in | |
3791 | prepare_to_modify_buffer). */ | |
3792 | specbind (intern ("buffer-file-name"), Qnil); | |
db327c7e | 3793 | insert_from_buffer (XBUFFER (conversion_buffer), |
50342b35 | 3794 | same_at_start_charpos, inserted_chars, 0); |
427f5aab KH |
3795 | /* Set `inserted' to the number of inserted characters. */ |
3796 | inserted = PT - temp; | |
77343e1d KH |
3797 | /* Set point before the inserted characters. */ |
3798 | SET_PT_BOTH (temp, same_at_start); | |
3dbcf3f6 | 3799 | |
db327c7e | 3800 | unbind_to (this_count, Qnil); |
3dbcf3f6 | 3801 | |
3dbcf3f6 | 3802 | goto handled; |
3d0387c0 RS |
3803 | } |
3804 | ||
d4b8687b | 3805 | if (! not_regular) |
1c8e352f | 3806 | total = XINT (end) - XINT (beg); |
d4b8687b RS |
3807 | else |
3808 | /* For a special file, all we can do is guess. */ | |
3809 | total = READ_BUF_SIZE; | |
570d7624 | 3810 | |
8b913b57 | 3811 | if (NILP (visit) && total > 0) |
68780e2a RS |
3812 | { |
3813 | #ifdef CLASH_DETECTION | |
4b4deea2 | 3814 | if (!NILP (BVAR (current_buffer, file_truename)) |
68780e2a | 3815 | /* Make binding buffer-file-name to nil effective. */ |
4b4deea2 | 3816 | && !NILP (BVAR (current_buffer, filename)) |
68780e2a RS |
3817 | && SAVE_MODIFF >= MODIFF) |
3818 | we_locked_file = 1; | |
3819 | #endif /* CLASH_DETECTION */ | |
3820 | prepare_to_modify_buffer (GPT, GPT, NULL); | |
3821 | } | |
570d7624 | 3822 | |
7fe52289 | 3823 | move_gap (PT); |
7fded690 JB |
3824 | if (GAP_SIZE < total) |
3825 | make_gap (total - GAP_SIZE); | |
3826 | ||
a1d2b64a | 3827 | if (XINT (beg) != 0 || !NILP (replace)) |
7fded690 | 3828 | { |
e69dafad | 3829 | if (emacs_lseek (fd, XINT (beg), SEEK_SET) < 0) |
b1d1b865 RS |
3830 | report_file_error ("Setting file position", |
3831 | Fcons (orig_filename, Qnil)); | |
7fded690 JB |
3832 | } |
3833 | ||
6fdaa9a0 | 3834 | /* In the following loop, HOW_MUCH contains the total bytes read so |
c8a6d68a KH |
3835 | far for a regular file, and not changed for a special file. But, |
3836 | before exiting the loop, it is set to a negative value if I/O | |
3837 | error occurs. */ | |
a1d2b64a | 3838 | how_much = 0; |
efdc16c9 | 3839 | |
6fdaa9a0 KH |
3840 | /* Total bytes inserted. */ |
3841 | inserted = 0; | |
efdc16c9 | 3842 | |
c8a6d68a | 3843 | /* Here, we don't do code conversion in the loop. It is done by |
db327c7e | 3844 | decode_coding_gap after all data are read into the buffer. */ |
1b978129 | 3845 | { |
ae19ba7c | 3846 | EMACS_INT gap_size = GAP_SIZE; |
efdc16c9 | 3847 | |
1b978129 GM |
3848 | while (how_much < total) |
3849 | { | |
5e570b75 | 3850 | /* try is reserved in some compilers (Microsoft C) */ |
ae19ba7c SM |
3851 | EMACS_INT trytry = min (total - how_much, READ_BUF_SIZE); |
3852 | EMACS_INT this; | |
570d7624 | 3853 | |
1b978129 GM |
3854 | if (not_regular) |
3855 | { | |
f839df0c | 3856 | Lisp_Object nbytes; |
570d7624 | 3857 | |
1b978129 GM |
3858 | /* Maybe make more room. */ |
3859 | if (gap_size < trytry) | |
3860 | { | |
3861 | make_gap (total - gap_size); | |
3862 | gap_size = GAP_SIZE; | |
3863 | } | |
3864 | ||
3865 | /* Read from the file, capturing `quit'. When an | |
3866 | error occurs, end the loop, and arrange for a quit | |
3867 | to be signaled after decoding the text we read. */ | |
3868 | non_regular_fd = fd; | |
3869 | non_regular_inserted = inserted; | |
3870 | non_regular_nbytes = trytry; | |
f839df0c PE |
3871 | nbytes = internal_condition_case_1 (read_non_regular, |
3872 | Qnil, Qerror, | |
3873 | read_non_regular_quit); | |
3874 | if (NILP (nbytes)) | |
1b978129 GM |
3875 | { |
3876 | read_quit = 1; | |
3877 | break; | |
3878 | } | |
3879 | ||
f839df0c | 3880 | this = XINT (nbytes); |
1b978129 GM |
3881 | } |
3882 | else | |
3883 | { | |
3884 | /* Allow quitting out of the actual I/O. We don't make text | |
3885 | part of the buffer until all the reading is done, so a C-g | |
3886 | here doesn't do any harm. */ | |
3887 | immediate_quit = 1; | |
3888 | QUIT; | |
5976c3fe PE |
3889 | this = emacs_read (fd, |
3890 | ((char *) BEG_ADDR + PT_BYTE - BEG_BYTE | |
3891 | + inserted), | |
3892 | trytry); | |
1b978129 GM |
3893 | immediate_quit = 0; |
3894 | } | |
efdc16c9 | 3895 | |
1b978129 GM |
3896 | if (this <= 0) |
3897 | { | |
3898 | how_much = this; | |
3899 | break; | |
3900 | } | |
3901 | ||
3902 | gap_size -= this; | |
3903 | ||
3904 | /* For a regular file, where TOTAL is the real size, | |
3905 | count HOW_MUCH to compare with it. | |
3906 | For a special file, where TOTAL is just a buffer size, | |
3907 | so don't bother counting in HOW_MUCH. | |
3908 | (INSERTED is where we count the number of characters inserted.) */ | |
3909 | if (! not_regular) | |
3910 | how_much += this; | |
3911 | inserted += this; | |
3912 | } | |
3913 | } | |
3914 | ||
68780e2a RS |
3915 | /* Now we have read all the file data into the gap. |
3916 | If it was empty, undo marking the buffer modified. */ | |
3917 | ||
3918 | if (inserted == 0) | |
3919 | { | |
6840d350 | 3920 | #ifdef CLASH_DETECTION |
68780e2a | 3921 | if (we_locked_file) |
4b4deea2 | 3922 | unlock_file (BVAR (current_buffer, file_truename)); |
6840d350 | 3923 | #endif |
68780e2a RS |
3924 | Vdeactivate_mark = old_Vdeactivate_mark; |
3925 | } | |
83c1cf6d RS |
3926 | else |
3927 | Vdeactivate_mark = Qt; | |
68780e2a | 3928 | |
1b978129 GM |
3929 | /* Make the text read part of the buffer. */ |
3930 | GAP_SIZE -= inserted; | |
3931 | GPT += inserted; | |
3932 | GPT_BYTE += inserted; | |
3933 | ZV += inserted; | |
3934 | ZV_BYTE += inserted; | |
3935 | Z += inserted; | |
3936 | Z_BYTE += inserted; | |
6fdaa9a0 | 3937 | |
c8a6d68a KH |
3938 | if (GAP_SIZE > 0) |
3939 | /* Put an anchor to ensure multi-byte form ends at gap. */ | |
3940 | *GPT_ADDR = 0; | |
d4b8687b | 3941 | |
68c45bf0 | 3942 | emacs_close (fd); |
6fdaa9a0 | 3943 | |
c8a6d68a KH |
3944 | /* Discard the unwind protect for closing the file. */ |
3945 | specpdl_ptr--; | |
6fdaa9a0 | 3946 | |
c8a6d68a KH |
3947 | if (how_much < 0) |
3948 | error ("IO error reading %s: %s", | |
d5db4077 | 3949 | SDATA (orig_filename), emacs_strerror (errno)); |
ec7adf26 | 3950 | |
f8569325 DL |
3951 | notfound: |
3952 | ||
db327c7e | 3953 | if (NILP (coding_system)) |
c8a6d68a | 3954 | { |
2df42e09 | 3955 | /* The coding system is not yet decided. Decide it by an |
dfe35e7b RS |
3956 | optimized method for handling `coding:' tag. |
3957 | ||
3958 | Note that we can get here only if the buffer was empty | |
3959 | before the insertion. */ | |
f736ffbf | 3960 | |
2df42e09 | 3961 | if (!NILP (Vcoding_system_for_read)) |
db327c7e | 3962 | coding_system = Vcoding_system_for_read; |
2df42e09 KH |
3963 | else |
3964 | { | |
98a7d268 KH |
3965 | /* Since we are sure that the current buffer was empty |
3966 | before the insertion, we can toggle | |
3967 | enable-multibyte-characters directly here without taking | |
9a7f80aa KH |
3968 | care of marker adjustment. By this way, we can run Lisp |
3969 | program safely before decoding the inserted text. */ | |
98a7d268 | 3970 | Lisp_Object unwind_data; |
f839df0c | 3971 | int count1 = SPECPDL_INDEX (); |
2df42e09 | 3972 | |
4b4deea2 TT |
3973 | unwind_data = Fcons (BVAR (current_buffer, enable_multibyte_characters), |
3974 | Fcons (BVAR (current_buffer, undo_list), | |
98a7d268 | 3975 | Fcurrent_buffer ())); |
4b4deea2 TT |
3976 | BVAR (current_buffer, enable_multibyte_characters) = Qnil; |
3977 | BVAR (current_buffer, undo_list) = Qt; | |
98a7d268 KH |
3978 | record_unwind_protect (decide_coding_unwind, unwind_data); |
3979 | ||
3980 | if (inserted > 0 && ! NILP (Vset_auto_coding_function)) | |
3981 | { | |
db327c7e | 3982 | coding_system = call2 (Vset_auto_coding_function, |
8f924df7 | 3983 | filename, make_number (inserted)); |
2df42e09 | 3984 | } |
f736ffbf | 3985 | |
db327c7e | 3986 | if (NILP (coding_system)) |
2df42e09 KH |
3987 | { |
3988 | /* If the coding system is not yet decided, check | |
3989 | file-coding-system-alist. */ | |
8f924df7 | 3990 | Lisp_Object args[6]; |
f736ffbf | 3991 | |
2df42e09 KH |
3992 | args[0] = Qinsert_file_contents, args[1] = orig_filename; |
3993 | args[2] = visit, args[3] = beg, args[4] = end, args[5] = Qnil; | |
8f924df7 KH |
3994 | coding_system = Ffind_operation_coding_system (6, args); |
3995 | if (CONSP (coding_system)) | |
3996 | coding_system = XCAR (coding_system); | |
f736ffbf | 3997 | } |
f839df0c | 3998 | unbind_to (count1, Qnil); |
98a7d268 | 3999 | inserted = Z_BYTE - BEG_BYTE; |
2df42e09 | 4000 | } |
f736ffbf | 4001 | |
db327c7e KH |
4002 | if (NILP (coding_system)) |
4003 | coding_system = Qundecided; | |
4004 | else | |
4005 | CHECK_CODING_SYSTEM (coding_system); | |
f736ffbf | 4006 | |
4b4deea2 | 4007 | if (NILP (BVAR (current_buffer, enable_multibyte_characters))) |
237a6fd2 | 4008 | /* We must suppress all character code conversion except for |
2df42e09 | 4009 | end-of-line conversion. */ |
db327c7e | 4010 | coding_system = raw_text_coding_system (coding_system); |
db327c7e KH |
4011 | setup_coding_system (coding_system, &coding); |
4012 | /* Ensure we set Vlast_coding_system_used. */ | |
4013 | set_coding_system = 1; | |
2df42e09 | 4014 | } |
f736ffbf | 4015 | |
db327c7e | 4016 | if (!NILP (visit)) |
8c3b9441 | 4017 | { |
db327c7e | 4018 | /* When we visit a file by raw-text, we change the buffer to |
9a7f80aa | 4019 | unibyte. */ |
db327c7e KH |
4020 | if (CODING_FOR_UNIBYTE (&coding) |
4021 | /* Can't do this if part of the buffer might be preserved. */ | |
4022 | && NILP (replace)) | |
4023 | /* Visiting a file with these coding system makes the buffer | |
4024 | unibyte. */ | |
4b4deea2 | 4025 | BVAR (current_buffer, enable_multibyte_characters) = Qnil; |
8c3b9441 KH |
4026 | } |
4027 | ||
4b4deea2 | 4028 | coding.dst_multibyte = ! NILP (BVAR (current_buffer, enable_multibyte_characters)); |
5b359650 | 4029 | if (CODING_MAY_REQUIRE_DECODING (&coding) |
1c157f8d | 4030 | && (inserted > 0 || CODING_REQUIRE_FLUSHING (&coding))) |
2df42e09 | 4031 | { |
db327c7e KH |
4032 | move_gap_both (PT, PT_BYTE); |
4033 | GAP_SIZE += inserted; | |
4034 | ZV_BYTE -= inserted; | |
4035 | Z_BYTE -= inserted; | |
4036 | ZV -= inserted; | |
4037 | Z -= inserted; | |
4038 | decode_coding_gap (&coding, inserted, inserted); | |
4039 | inserted = coding.produced_char; | |
5b359650 | 4040 | coding_system = CODING_ID_NAME (coding.id); |
2df42e09 | 4041 | } |
db327c7e KH |
4042 | else if (inserted > 0) |
4043 | adjust_after_insert (PT, PT_BYTE, PT + inserted, PT_BYTE + inserted, | |
4044 | inserted); | |
570d7624 | 4045 | |
cf6d2357 RS |
4046 | /* Now INSERTED is measured in characters. */ |
4047 | ||
32f4334d | 4048 | handled: |
570d7624 | 4049 | |
db65a627 CY |
4050 | if (deferred_remove_unwind_protect) |
4051 | /* If requested above, discard the unwind protect for closing the | |
4052 | file. */ | |
4053 | specpdl_ptr--; | |
4054 | ||
265a9e55 | 4055 | if (!NILP (visit)) |
570d7624 | 4056 | { |
4b4deea2 TT |
4057 | if (!EQ (BVAR (current_buffer, undo_list), Qt) && !nochange) |
4058 | BVAR (current_buffer, undo_list) = Qnil; | |
62bcf009 | 4059 | |
a7e82472 RS |
4060 | if (NILP (handler)) |
4061 | { | |
4062 | current_buffer->modtime = st.st_mtime; | |
58b963f7 | 4063 | current_buffer->modtime_size = st.st_size; |
4b4deea2 | 4064 | BVAR (current_buffer, filename) = orig_filename; |
a7e82472 | 4065 | } |
62bcf009 | 4066 | |
95385625 | 4067 | SAVE_MODIFF = MODIFF; |
0b5397c2 | 4068 | BUF_AUTOSAVE_MODIFF (current_buffer) = MODIFF; |
4b4deea2 | 4069 | XSETFASTINT (BVAR (current_buffer, save_length), Z - BEG); |
570d7624 | 4070 | #ifdef CLASH_DETECTION |
32f4334d RS |
4071 | if (NILP (handler)) |
4072 | { | |
4b4deea2 TT |
4073 | if (!NILP (BVAR (current_buffer, file_truename))) |
4074 | unlock_file (BVAR (current_buffer, file_truename)); | |
32f4334d RS |
4075 | unlock_file (filename); |
4076 | } | |
570d7624 | 4077 | #endif /* CLASH_DETECTION */ |
330bfe57 | 4078 | if (not_regular) |
24b1ddad KS |
4079 | xsignal2 (Qfile_error, |
4080 | build_string ("not a regular file"), orig_filename); | |
570d7624 JB |
4081 | } |
4082 | ||
b6426b03 | 4083 | if (set_coding_system) |
8f924df7 | 4084 | Vlast_coding_system_used = coding_system; |
b6426b03 | 4085 | |
2080470e | 4086 | if (! NILP (Ffboundp (Qafter_insert_file_set_coding))) |
b6426b03 | 4087 | { |
37a3c774 KH |
4088 | insval = call2 (Qafter_insert_file_set_coding, make_number (inserted), |
4089 | visit); | |
b6426b03 KH |
4090 | if (! NILP (insval)) |
4091 | { | |
4092 | CHECK_NUMBER (insval); | |
4093 | inserted = XFASTINT (insval); | |
4094 | } | |
4095 | } | |
4096 | ||
6420e80c | 4097 | /* Decode file format. */ |
c8a6d68a | 4098 | if (inserted > 0) |
0d420e88 | 4099 | { |
6420e80c | 4100 | /* Don't run point motion or modification hooks when decoding. */ |
f839df0c | 4101 | int count1 = SPECPDL_INDEX (); |
ae19ba7c | 4102 | EMACS_INT old_inserted = inserted; |
6f2528d8 MR |
4103 | specbind (Qinhibit_point_motion_hooks, Qt); |
4104 | specbind (Qinhibit_modification_hooks, Qt); | |
4105 | ||
6420e80c | 4106 | /* Save old undo list and don't record undo for decoding. */ |
4b4deea2 TT |
4107 | old_undo = BVAR (current_buffer, undo_list); |
4108 | BVAR (current_buffer, undo_list) = Qt; | |
efdc16c9 | 4109 | |
6f2528d8 | 4110 | if (NILP (replace)) |
ed8e506f | 4111 | { |
6f2528d8 MR |
4112 | insval = call3 (Qformat_decode, |
4113 | Qnil, make_number (inserted), visit); | |
4114 | CHECK_NUMBER (insval); | |
4115 | inserted = XFASTINT (insval); | |
4116 | } | |
4117 | else | |
4118 | { | |
4119 | /* If REPLACE is non-nil and we succeeded in not replacing the | |
6420e80c AS |
4120 | beginning or end of the buffer text with the file's contents, |
4121 | call format-decode with `point' positioned at the beginning | |
4122 | of the buffer and `inserted' equalling the number of | |
4123 | characters in the buffer. Otherwise, format-decode might | |
4124 | fail to correctly analyze the beginning or end of the buffer. | |
4125 | Hence we temporarily save `point' and `inserted' here and | |
4126 | restore `point' iff format-decode did not insert or delete | |
4127 | any text. Otherwise we leave `point' at point-min. */ | |
ae19ba7c SM |
4128 | EMACS_INT opoint = PT; |
4129 | EMACS_INT opoint_byte = PT_BYTE; | |
4130 | EMACS_INT oinserted = ZV - BEGV; | |
cac4219c | 4131 | int ochars_modiff = CHARS_MODIFF; |
1f163f28 MA |
4132 | |
4133 | TEMP_SET_PT_BOTH (BEGV, BEGV_BYTE); | |
6f2528d8 MR |
4134 | insval = call3 (Qformat_decode, |
4135 | Qnil, make_number (oinserted), visit); | |
4136 | CHECK_NUMBER (insval); | |
cac4219c MR |
4137 | if (ochars_modiff == CHARS_MODIFF) |
4138 | /* format_decode didn't modify buffer's characters => move | |
4139 | point back to position before inserted text and leave | |
6420e80c | 4140 | value of inserted alone. */ |
6f2528d8 | 4141 | SET_PT_BOTH (opoint, opoint_byte); |
cac4219c MR |
4142 | else |
4143 | /* format_decode modified buffer's characters => consider | |
6420e80c | 4144 | entire buffer changed and leave point at point-min. */ |
cac4219c | 4145 | inserted = XFASTINT (insval); |
ed8e506f | 4146 | } |
efdc16c9 | 4147 | |
6f2528d8 | 4148 | /* For consistency with format-decode call these now iff inserted > 0 |
6420e80c | 4149 | (martin 2007-06-28). */ |
6f2528d8 MR |
4150 | p = Vafter_insert_file_functions; |
4151 | while (CONSP (p)) | |
4152 | { | |
4153 | if (NILP (replace)) | |
4154 | { | |
4155 | insval = call1 (XCAR (p), make_number (inserted)); | |
4156 | if (!NILP (insval)) | |
4157 | { | |
4158 | CHECK_NUMBER (insval); | |
4159 | inserted = XFASTINT (insval); | |
4160 | } | |
4161 | } | |
4162 | else | |
4163 | { | |
6420e80c AS |
4164 | /* For the rationale of this see the comment on |
4165 | format-decode above. */ | |
ae19ba7c SM |
4166 | EMACS_INT opoint = PT; |
4167 | EMACS_INT opoint_byte = PT_BYTE; | |
4168 | EMACS_INT oinserted = ZV - BEGV; | |
cac4219c | 4169 | int ochars_modiff = CHARS_MODIFF; |
1f163f28 | 4170 | |
6f2528d8 MR |
4171 | TEMP_SET_PT_BOTH (BEGV, BEGV_BYTE); |
4172 | insval = call1 (XCAR (p), make_number (oinserted)); | |
4173 | if (!NILP (insval)) | |
4174 | { | |
4175 | CHECK_NUMBER (insval); | |
cac4219c MR |
4176 | if (ochars_modiff == CHARS_MODIFF) |
4177 | /* after_insert_file_functions didn't modify | |
4178 | buffer's characters => move point back to | |
4179 | position before inserted text and leave value of | |
6420e80c | 4180 | inserted alone. */ |
6f2528d8 | 4181 | SET_PT_BOTH (opoint, opoint_byte); |
cac4219c MR |
4182 | else |
4183 | /* after_insert_file_functions did modify buffer's | |
4184 | characters => consider entire buffer changed and | |
6420e80c | 4185 | leave point at point-min. */ |
cac4219c | 4186 | inserted = XFASTINT (insval); |
6f2528d8 MR |
4187 | } |
4188 | } | |
4189 | ||
4190 | QUIT; | |
4191 | p = XCDR (p); | |
ed8e506f | 4192 | } |
efdc16c9 | 4193 | |
6f2528d8 MR |
4194 | if (NILP (visit)) |
4195 | { | |
4b4deea2 | 4196 | BVAR (current_buffer, undo_list) = old_undo; |
6420e80c | 4197 | if (CONSP (old_undo) && inserted != old_inserted) |
6f2528d8 | 4198 | { |
6420e80c AS |
4199 | /* Adjust the last undo record for the size change during |
4200 | the format conversion. */ | |
6f2528d8 | 4201 | Lisp_Object tem = XCAR (old_undo); |
6420e80c AS |
4202 | if (CONSP (tem) && INTEGERP (XCAR (tem)) |
4203 | && INTEGERP (XCDR (tem)) | |
4204 | && XFASTINT (XCDR (tem)) == PT + old_inserted) | |
4205 | XSETCDR (tem, make_number (PT + inserted)); | |
6f2528d8 MR |
4206 | } |
4207 | } | |
6f2528d8 | 4208 | else |
1bc99c9c | 4209 | /* If undo_list was Qt before, keep it that way. |
6420e80c | 4210 | Otherwise start with an empty undo_list. */ |
4b4deea2 | 4211 | BVAR (current_buffer, undo_list) = EQ (old_undo, Qt) ? Qt : Qnil; |
efdc16c9 | 4212 | |
f839df0c | 4213 | unbind_to (count1, Qnil); |
0d420e88 BG |
4214 | } |
4215 | ||
0342d8c5 RS |
4216 | /* Call after-change hooks for the inserted text, aside from the case |
4217 | of normal visiting (not with REPLACE), which is done in a new buffer | |
4218 | "before" the buffer is changed. */ | |
c8a6d68a | 4219 | if (inserted > 0 && total > 0 |
0342d8c5 | 4220 | && (NILP (visit) || !NILP (replace))) |
ce51c54c KH |
4221 | { |
4222 | signal_after_change (PT, 0, inserted); | |
4223 | update_compositions (PT, PT, CHECK_BORDER); | |
4224 | } | |
b56567b5 | 4225 | |
f8569325 DL |
4226 | if (!NILP (visit) |
4227 | && current_buffer->modtime == -1) | |
4228 | { | |
4229 | /* If visiting nonexistent file, return nil. */ | |
4230 | report_file_error ("Opening input file", Fcons (orig_filename, Qnil)); | |
d6a3cc15 RS |
4231 | } |
4232 | ||
1b978129 GM |
4233 | if (read_quit) |
4234 | Fsignal (Qquit, Qnil); | |
4235 | ||
ec7adf26 | 4236 | /* ??? Retval needs to be dealt with in all cases consistently. */ |
a1d2b64a | 4237 | if (NILP (val)) |
b1d1b865 | 4238 | val = Fcons (orig_filename, |
a1d2b64a RS |
4239 | Fcons (make_number (inserted), |
4240 | Qnil)); | |
4241 | ||
4242 | RETURN_UNGCPRO (unbind_to (count, val)); | |
570d7624 | 4243 | } |
7fded690 | 4244 | \f |
f57e2426 | 4245 | static Lisp_Object build_annotations (Lisp_Object, Lisp_Object); |
d6a3cc15 | 4246 | |
199607e4 | 4247 | static Lisp_Object |
971de7fb | 4248 | build_annotations_unwind (Lisp_Object arg) |
6fc6f94b | 4249 | { |
67fbc0cb | 4250 | Vwrite_region_annotation_buffers = arg; |
6fc6f94b RS |
4251 | return Qnil; |
4252 | } | |
4253 | ||
7c82a4a9 SM |
4254 | /* Decide the coding-system to encode the data with. */ |
4255 | ||
c934586d | 4256 | static Lisp_Object |
dd4c5104 DN |
4257 | choose_write_coding_system (Lisp_Object start, Lisp_Object end, Lisp_Object filename, |
4258 | Lisp_Object append, Lisp_Object visit, Lisp_Object lockname, | |
4259 | struct coding_system *coding) | |
7c82a4a9 SM |
4260 | { |
4261 | Lisp_Object val; | |
75421805 | 4262 | Lisp_Object eol_parent = Qnil; |
7c82a4a9 | 4263 | |
6b61353c | 4264 | if (auto_saving |
4b4deea2 TT |
4265 | && NILP (Fstring_equal (BVAR (current_buffer, filename), |
4266 | BVAR (current_buffer, auto_save_file_name)))) | |
75421805 KH |
4267 | { |
4268 | val = Qutf_8_emacs; | |
4269 | eol_parent = Qunix; | |
4270 | } | |
7c82a4a9 | 4271 | else if (!NILP (Vcoding_system_for_write)) |
42b01e1e KH |
4272 | { |
4273 | val = Vcoding_system_for_write; | |
4274 | if (coding_system_require_warning | |
4275 | && !NILP (Ffboundp (Vselect_safe_coding_system_function))) | |
4276 | /* Confirm that VAL can surely encode the current region. */ | |
4277 | val = call5 (Vselect_safe_coding_system_function, | |
4278 | start, end, Fcons (Qt, Fcons (val, Qnil)), | |
4279 | Qnil, filename); | |
4280 | } | |
7c82a4a9 SM |
4281 | else |
4282 | { | |
4283 | /* If the variable `buffer-file-coding-system' is set locally, | |
4284 | it means that the file was read with some kind of code | |
4285 | conversion or the variable is explicitly set by users. We | |
4286 | had better write it out with the same coding system even if | |
4287 | `enable-multibyte-characters' is nil. | |
4288 | ||
4289 | If it is not set locally, we anyway have to convert EOL | |
4290 | format if the default value of `buffer-file-coding-system' | |
4291 | tells that it is not Unix-like (LF only) format. */ | |
4292 | int using_default_coding = 0; | |
4293 | int force_raw_text = 0; | |
4294 | ||
4b4deea2 | 4295 | val = BVAR (current_buffer, buffer_file_coding_system); |
7c82a4a9 SM |
4296 | if (NILP (val) |
4297 | || NILP (Flocal_variable_p (Qbuffer_file_coding_system, Qnil))) | |
4298 | { | |
4299 | val = Qnil; | |
4b4deea2 | 4300 | if (NILP (BVAR (current_buffer, enable_multibyte_characters))) |
7c82a4a9 SM |
4301 | force_raw_text = 1; |
4302 | } | |
efdc16c9 | 4303 | |
7c82a4a9 SM |
4304 | if (NILP (val)) |
4305 | { | |
4306 | /* Check file-coding-system-alist. */ | |
4307 | Lisp_Object args[7], coding_systems; | |
4308 | ||
4309 | args[0] = Qwrite_region; args[1] = start; args[2] = end; | |
4310 | args[3] = filename; args[4] = append; args[5] = visit; | |
4311 | args[6] = lockname; | |
4312 | coding_systems = Ffind_operation_coding_system (7, args); | |
4313 | if (CONSP (coding_systems) && !NILP (XCDR (coding_systems))) | |
4314 | val = XCDR (coding_systems); | |
4315 | } | |
4316 | ||
c934586d | 4317 | if (NILP (val)) |
7c82a4a9 SM |
4318 | { |
4319 | /* If we still have not decided a coding system, use the | |
4320 | default value of buffer-file-coding-system. */ | |
4b4deea2 | 4321 | val = BVAR (current_buffer, buffer_file_coding_system); |
7c82a4a9 SM |
4322 | using_default_coding = 1; |
4323 | } | |
efdc16c9 | 4324 | |
db327c7e KH |
4325 | if (! NILP (val) && ! force_raw_text) |
4326 | { | |
4327 | Lisp_Object spec, attrs; | |
4328 | ||
4329 | CHECK_CODING_SYSTEM_GET_SPEC (val, spec); | |
4330 | attrs = AREF (spec, 0); | |
4331 | if (EQ (CODING_ATTR_TYPE (attrs), Qraw_text)) | |
4332 | force_raw_text = 1; | |
4333 | } | |
4334 | ||
7c82a4a9 SM |
4335 | if (!force_raw_text |
4336 | && !NILP (Ffboundp (Vselect_safe_coding_system_function))) | |
4337 | /* Confirm that VAL can surely encode the current region. */ | |
905a4276 PJ |
4338 | val = call5 (Vselect_safe_coding_system_function, |
4339 | start, end, val, Qnil, filename); | |
7c82a4a9 | 4340 | |
db327c7e KH |
4341 | /* If the decided coding-system doesn't specify end-of-line |
4342 | format, we use that of | |
4343 | `default-buffer-file-coding-system'. */ | |
c934586d | 4344 | if (! using_default_coding |
4b4deea2 | 4345 | && ! NILP (BVAR (&buffer_defaults, buffer_file_coding_system))) |
db327c7e | 4346 | val = (coding_inherit_eol_type |
4b4deea2 | 4347 | (val, BVAR (&buffer_defaults, buffer_file_coding_system))); |
7c82a4a9 | 4348 | |
db327c7e KH |
4349 | /* If we decide not to encode text, use `raw-text' or one of its |
4350 | subsidiaries. */ | |
7c82a4a9 | 4351 | if (force_raw_text) |
db327c7e | 4352 | val = raw_text_coding_system (val); |
7c82a4a9 SM |
4353 | } |
4354 | ||
75421805 | 4355 | val = coding_inherit_eol_type (val, eol_parent); |
c934586d | 4356 | setup_coding_system (val, coding); |
7c82a4a9 | 4357 | |
4b4deea2 | 4358 | if (!STRINGP (start) && !NILP (BVAR (current_buffer, selective_display))) |
7c82a4a9 | 4359 | coding->mode |= CODING_MODE_SELECTIVE_DISPLAY; |
c934586d | 4360 | return val; |
7c82a4a9 SM |
4361 | } |
4362 | ||
a7ca3326 | 4363 | DEFUN ("write-region", Fwrite_region, Swrite_region, 3, 7, |
8c1a1077 PJ |
4364 | "r\nFWrite region to file: \ni\ni\ni\np", |
4365 | doc: /* Write current region into specified file. | |
c2efea25 RS |
4366 | When called from a program, requires three arguments: |
4367 | START, END and FILENAME. START and END are normally buffer positions | |
4368 | specifying the part of the buffer to write. | |
4369 | If START is nil, that means to use the entire buffer contents. | |
4370 | If START is a string, then output that string to the file | |
4371 | instead of any buffer contents; END is ignored. | |
4372 | ||
8c1a1077 PJ |
4373 | Optional fourth argument APPEND if non-nil means |
4374 | append to existing file contents (if any). If it is an integer, | |
4375 | seek to that offset in the file before writing. | |
36e50520 | 4376 | Optional fifth argument VISIT, if t or a string, means |
8c1a1077 PJ |
4377 | set the last-save-file-modtime of buffer to this file's modtime |
4378 | and mark buffer not modified. | |
4379 | If VISIT is a string, it is a second file name; | |
4380 | the output goes to FILENAME, but the buffer is marked as visiting VISIT. | |
4381 | VISIT is also the file name to lock and unlock for clash detection. | |
4382 | If VISIT is neither t nor nil nor a string, | |
5f4e6aa9 | 4383 | that means do not display the \"Wrote file\" message. |
8c1a1077 PJ |
4384 | The optional sixth arg LOCKNAME, if non-nil, specifies the name to |
4385 | use for locking and unlocking, overriding FILENAME and VISIT. | |
4386 | The optional seventh arg MUSTBENEW, if non-nil, insists on a check | |
4387 | for an existing file with the same name. If MUSTBENEW is `excl', | |
4388 | that means to get an error if the file already exists; never overwrite. | |
4389 | If MUSTBENEW is neither nil nor `excl', that means ask for | |
4390 | confirmation before overwriting, but do go ahead and overwrite the file | |
4391 | if the user confirms. | |
8c1a1077 PJ |
4392 | |
4393 | This does code conversion according to the value of | |
4394 | `coding-system-for-write', `buffer-file-coding-system', or | |
4395 | `file-coding-system-alist', and sets the variable | |
aacd8ba1 GM |
4396 | `last-coding-system-used' to the coding system actually used. |
4397 | ||
4398 | This calls `write-region-annotate-functions' at the start, and | |
4399 | `write-region-post-annotation-function' at the end. */) | |
5842a27b | 4400 | (Lisp_Object start, Lisp_Object end, Lisp_Object filename, Lisp_Object append, Lisp_Object visit, Lisp_Object lockname, Lisp_Object mustbenew) |
570d7624 JB |
4401 | { |
4402 | register int desc; | |
4403 | int failure; | |
6bbd7a29 | 4404 | int save_errno = 0; |
5976c3fe | 4405 | const char *fn; |
570d7624 | 4406 | struct stat st; |
aed13378 | 4407 | int count = SPECPDL_INDEX (); |
6fc6f94b | 4408 | int count1; |
3eac9910 | 4409 | Lisp_Object handler; |
4ad827c5 | 4410 | Lisp_Object visit_file; |
65b7d3e7 | 4411 | Lisp_Object annotations; |
b1d1b865 | 4412 | Lisp_Object encoded_filename; |
d3a67486 SM |
4413 | int visiting = (EQ (visit, Qt) || STRINGP (visit)); |
4414 | int quietly = !NILP (visit); | |
7204a979 | 4415 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4, gcpro5; |
6fc6f94b | 4416 | struct buffer *given_buffer; |
6fdaa9a0 | 4417 | struct coding_system coding; |
570d7624 | 4418 | |
d3a67486 | 4419 | if (current_buffer->base_buffer && visiting) |
95385625 RS |
4420 | error ("Cannot do file visiting in an indirect buffer"); |
4421 | ||
561cb8e1 | 4422 | if (!NILP (start) && !STRINGP (start)) |
570d7624 JB |
4423 | validate_region (&start, &end); |
4424 | ||
95c1c901 | 4425 | visit_file = Qnil; |
59fac292 | 4426 | GCPRO5 (start, filename, visit, visit_file, lockname); |
b56567b5 | 4427 | |
570d7624 | 4428 | filename = Fexpand_file_name (filename, Qnil); |
de1d0127 | 4429 | |
236a12f2 | 4430 | if (!NILP (mustbenew) && !EQ (mustbenew, Qexcl)) |
b8b29dc9 | 4431 | barf_or_query_if_file_exists (filename, "overwrite", 1, 0, 1); |
de1d0127 | 4432 | |
561cb8e1 | 4433 | if (STRINGP (visit)) |
e5176bae | 4434 | visit_file = Fexpand_file_name (visit, Qnil); |
4ad827c5 RS |
4435 | else |
4436 | visit_file = filename; | |
4437 | ||
7204a979 RS |
4438 | if (NILP (lockname)) |
4439 | lockname = visit_file; | |
4440 | ||
65b7d3e7 RS |
4441 | annotations = Qnil; |
4442 | ||
32f4334d RS |
4443 | /* If the file name has special constructs in it, |
4444 | call the corresponding file handler. */ | |
49307295 | 4445 | handler = Ffind_file_name_handler (filename, Qwrite_region); |
b56ad927 | 4446 | /* If FILENAME has no handler, see if VISIT has one. */ |
93c30b5f | 4447 | if (NILP (handler) && STRINGP (visit)) |
199607e4 | 4448 | handler = Ffind_file_name_handler (visit, Qwrite_region); |
3eac9910 | 4449 | |
32f4334d RS |
4450 | if (!NILP (handler)) |
4451 | { | |
32f4334d | 4452 | Lisp_Object val; |
51cf6d37 RS |
4453 | val = call6 (handler, Qwrite_region, start, end, |
4454 | filename, append, visit); | |
32f4334d | 4455 | |
d6a3cc15 | 4456 | if (visiting) |
32f4334d | 4457 | { |
95385625 | 4458 | SAVE_MODIFF = MODIFF; |
4b4deea2 TT |
4459 | XSETFASTINT (BVAR (current_buffer, save_length), Z - BEG); |
4460 | BVAR (current_buffer, filename) = visit_file; | |
32f4334d | 4461 | } |
09121adc | 4462 | UNGCPRO; |
32f4334d RS |
4463 | return val; |
4464 | } | |
4465 | ||
4a38de71 KH |
4466 | record_unwind_protect (save_restriction_restore, save_restriction_save ()); |
4467 | ||
561cb8e1 RS |
4468 | /* Special kludge to simplify auto-saving. */ |
4469 | if (NILP (start)) | |
4470 | { | |
6b3d752c SM |
4471 | /* Do it later, so write-region-annotate-function can work differently |
4472 | if we save "the buffer" vs "a region". | |
4473 | This is useful in tar-mode. --Stef | |
2acfd7ae | 4474 | XSETFASTINT (start, BEG); |
6b3d752c | 4475 | XSETFASTINT (end, Z); */ |
4a38de71 | 4476 | Fwiden (); |
561cb8e1 RS |
4477 | } |
4478 | ||
67fbc0cb CY |
4479 | record_unwind_protect (build_annotations_unwind, |
4480 | Vwrite_region_annotation_buffers); | |
4481 | Vwrite_region_annotation_buffers = Fcons (Fcurrent_buffer (), Qnil); | |
aed13378 | 4482 | count1 = SPECPDL_INDEX (); |
6fc6f94b RS |
4483 | |
4484 | given_buffer = current_buffer; | |
bf3428a1 RS |
4485 | |
4486 | if (!STRINGP (start)) | |
236a12f2 | 4487 | { |
bf3428a1 RS |
4488 | annotations = build_annotations (start, end); |
4489 | ||
4490 | if (current_buffer != given_buffer) | |
4491 | { | |
4492 | XSETFASTINT (start, BEGV); | |
4493 | XSETFASTINT (end, ZV); | |
4494 | } | |
236a12f2 SM |
4495 | } |
4496 | ||
6b3d752c SM |
4497 | if (NILP (start)) |
4498 | { | |
4499 | XSETFASTINT (start, BEGV); | |
4500 | XSETFASTINT (end, ZV); | |
4501 | } | |
4502 | ||
236a12f2 SM |
4503 | UNGCPRO; |
4504 | ||
4505 | GCPRO5 (start, filename, annotations, visit_file, lockname); | |
4506 | ||
59fac292 SM |
4507 | /* Decide the coding-system to encode the data with. |
4508 | We used to make this choice before calling build_annotations, but that | |
4509 | leads to problems when a write-annotate-function takes care of | |
4510 | unsavable chars (as was the case with X-Symbol). */ | |
c934586d KH |
4511 | Vlast_coding_system_used |
4512 | = choose_write_coding_system (start, end, filename, | |
4513 | append, visit, lockname, &coding); | |
d6a3cc15 | 4514 | |
570d7624 JB |
4515 | #ifdef CLASH_DETECTION |
4516 | if (!auto_saving) | |
67fbc0cb | 4517 | lock_file (lockname); |
570d7624 JB |
4518 | #endif /* CLASH_DETECTION */ |
4519 | ||
b1d1b865 RS |
4520 | encoded_filename = ENCODE_FILE (filename); |
4521 | ||
5976c3fe | 4522 | fn = SSDATA (encoded_filename); |
570d7624 | 4523 | desc = -1; |
265a9e55 | 4524 | if (!NILP (append)) |
5e570b75 | 4525 | #ifdef DOS_NT |
05c65251 | 4526 | desc = emacs_open (fn, O_WRONLY | O_BINARY, 0); |
5e570b75 | 4527 | #else /* not DOS_NT */ |
68c45bf0 | 4528 | desc = emacs_open (fn, O_WRONLY, 0); |
5e570b75 | 4529 | #endif /* not DOS_NT */ |
570d7624 | 4530 | |
b1d1b865 | 4531 | if (desc < 0 && (NILP (append) || errno == ENOENT)) |
5e570b75 | 4532 | #ifdef DOS_NT |
68c45bf0 | 4533 | desc = emacs_open (fn, |
05c65251 | 4534 | O_WRONLY | O_CREAT | O_BINARY |
95522746 | 4535 | | (EQ (mustbenew, Qexcl) ? O_EXCL : O_TRUNC), |
68c45bf0 | 4536 | S_IREAD | S_IWRITE); |
5e570b75 | 4537 | #else /* not DOS_NT */ |
68c45bf0 | 4538 | desc = emacs_open (fn, O_WRONLY | O_TRUNC | O_CREAT |
7c752c80 | 4539 | | (EQ (mustbenew, Qexcl) ? O_EXCL : 0), |
68c45bf0 | 4540 | auto_saving ? auto_save_mode_bits : 0666); |
5e570b75 | 4541 | #endif /* not DOS_NT */ |
570d7624 JB |
4542 | |
4543 | if (desc < 0) | |
4544 | { | |
4545 | #ifdef CLASH_DETECTION | |
4546 | save_errno = errno; | |
7204a979 | 4547 | if (!auto_saving) unlock_file (lockname); |
570d7624 JB |
4548 | errno = save_errno; |
4549 | #endif /* CLASH_DETECTION */ | |
43fb7d9a | 4550 | UNGCPRO; |
570d7624 JB |
4551 | report_file_error ("Opening output file", Fcons (filename, Qnil)); |
4552 | } | |
4553 | ||
4554 | record_unwind_protect (close_file_unwind, make_number (desc)); | |
4555 | ||
c1c4693e | 4556 | if (!NILP (append) && !NILP (Ffile_regular_p (filename))) |
43fb7d9a DL |
4557 | { |
4558 | long ret; | |
efdc16c9 | 4559 | |
43fb7d9a | 4560 | if (NUMBERP (append)) |
e69dafad | 4561 | ret = emacs_lseek (desc, XINT (append), SEEK_CUR); |
43fb7d9a | 4562 | else |
e69dafad | 4563 | ret = lseek (desc, 0, SEEK_END); |
43fb7d9a DL |
4564 | if (ret < 0) |
4565 | { | |
570d7624 | 4566 | #ifdef CLASH_DETECTION |
43fb7d9a | 4567 | if (!auto_saving) unlock_file (lockname); |
570d7624 | 4568 | #endif /* CLASH_DETECTION */ |
43fb7d9a DL |
4569 | UNGCPRO; |
4570 | report_file_error ("Lseek error", Fcons (filename, Qnil)); | |
4571 | } | |
4572 | } | |
efdc16c9 | 4573 | |
43fb7d9a | 4574 | UNGCPRO; |
570d7624 | 4575 | |
570d7624 JB |
4576 | failure = 0; |
4577 | immediate_quit = 1; | |
4578 | ||
561cb8e1 | 4579 | if (STRINGP (start)) |
570d7624 | 4580 | { |
d5db4077 | 4581 | failure = 0 > a_write (desc, start, 0, SCHARS (start), |
ce51c54c | 4582 | &annotations, &coding); |
570d7624 JB |
4583 | save_errno = errno; |
4584 | } | |
4585 | else if (XINT (start) != XINT (end)) | |
4586 | { | |
db327c7e KH |
4587 | failure = 0 > a_write (desc, Qnil, |
4588 | XINT (start), XINT (end) - XINT (start), | |
4589 | &annotations, &coding); | |
4590 | save_errno = errno; | |
69f6e679 RS |
4591 | } |
4592 | else | |
4593 | { | |
4594 | /* If file was empty, still need to write the annotations */ | |
c8a6d68a | 4595 | coding.mode |= CODING_MODE_LAST_BLOCK; |
ce51c54c | 4596 | failure = 0 > a_write (desc, Qnil, XINT (end), 0, &annotations, &coding); |
6fdaa9a0 KH |
4597 | save_errno = errno; |
4598 | } | |
4599 | ||
c8a6d68a KH |
4600 | if (CODING_REQUIRE_FLUSHING (&coding) |
4601 | && !(coding.mode & CODING_MODE_LAST_BLOCK) | |
1354debd | 4602 | && ! failure) |
6fdaa9a0 KH |
4603 | { |
4604 | /* We have to flush out a data. */ | |
c8a6d68a | 4605 | coding.mode |= CODING_MODE_LAST_BLOCK; |
db327c7e | 4606 | failure = 0 > e_write (desc, Qnil, 1, 1, &coding); |
69f6e679 | 4607 | save_errno = errno; |
570d7624 JB |
4608 | } |
4609 | ||
4610 | immediate_quit = 0; | |
4611 | ||
6e23c83e | 4612 | #ifdef HAVE_FSYNC |
570d7624 JB |
4613 | /* Note fsync appears to change the modtime on BSD4.2 (both vax and sun). |
4614 | Disk full in NFS may be reported here. */ | |
1daffa1c RS |
4615 | /* mib says that closing the file will try to write as fast as NFS can do |
4616 | it, and that means the fsync here is not crucial for autosave files. */ | |
ccf61795 | 4617 | if (!auto_saving && !write_region_inhibit_fsync && fsync (desc) < 0) |
cb33c142 | 4618 | { |
6cff77fd AS |
4619 | /* If fsync fails with EINTR, don't treat that as serious. Also |
4620 | ignore EINVAL which happens when fsync is not supported on this | |
4621 | file. */ | |
4622 | if (errno != EINTR && errno != EINVAL) | |
cb33c142 KH |
4623 | failure = 1, save_errno = errno; |
4624 | } | |
570d7624 JB |
4625 | #endif |
4626 | ||
570d7624 | 4627 | /* NFS can report a write failure now. */ |
68c45bf0 | 4628 | if (emacs_close (desc) < 0) |
570d7624 JB |
4629 | failure = 1, save_errno = errno; |
4630 | ||
570d7624 | 4631 | stat (fn, &st); |
67fbc0cb | 4632 | |
6fc6f94b RS |
4633 | /* Discard the unwind protect for close_file_unwind. */ |
4634 | specpdl_ptr = specpdl + count1; | |
67fbc0cb CY |
4635 | |
4636 | /* Call write-region-post-annotation-function. */ | |
294fa707 | 4637 | while (CONSP (Vwrite_region_annotation_buffers)) |
67fbc0cb CY |
4638 | { |
4639 | Lisp_Object buf = XCAR (Vwrite_region_annotation_buffers); | |
4640 | if (!NILP (Fbuffer_live_p (buf))) | |
4641 | { | |
4642 | Fset_buffer (buf); | |
4643 | if (FUNCTIONP (Vwrite_region_post_annotation_function)) | |
4644 | call0 (Vwrite_region_post_annotation_function); | |
4645 | } | |
4646 | Vwrite_region_annotation_buffers | |
4647 | = XCDR (Vwrite_region_annotation_buffers); | |
4648 | } | |
4649 | ||
4650 | unbind_to (count, Qnil); | |
570d7624 JB |
4651 | |
4652 | #ifdef CLASH_DETECTION | |
4653 | if (!auto_saving) | |
7204a979 | 4654 | unlock_file (lockname); |
570d7624 JB |
4655 | #endif /* CLASH_DETECTION */ |
4656 | ||
4657 | /* Do this before reporting IO error | |
4658 | to avoid a "file has changed on disk" warning on | |
4659 | next attempt to save. */ | |
d6a3cc15 | 4660 | if (visiting) |
58b963f7 SM |
4661 | { |
4662 | current_buffer->modtime = st.st_mtime; | |
4663 | current_buffer->modtime_size = st.st_size; | |
4664 | } | |
570d7624 JB |
4665 | |
4666 | if (failure) | |
d5db4077 | 4667 | error ("IO error writing %s: %s", SDATA (filename), |
68c45bf0 | 4668 | emacs_strerror (save_errno)); |
570d7624 | 4669 | |
d6a3cc15 | 4670 | if (visiting) |
570d7624 | 4671 | { |
95385625 | 4672 | SAVE_MODIFF = MODIFF; |
4b4deea2 TT |
4673 | XSETFASTINT (BVAR (current_buffer, save_length), Z - BEG); |
4674 | BVAR (current_buffer, filename) = visit_file; | |
f4226e89 | 4675 | update_mode_lines++; |
570d7624 | 4676 | } |
d6a3cc15 | 4677 | else if (quietly) |
6b61353c KH |
4678 | { |
4679 | if (auto_saving | |
4b4deea2 TT |
4680 | && ! NILP (Fstring_equal (BVAR (current_buffer, filename), |
4681 | BVAR (current_buffer, auto_save_file_name)))) | |
6b61353c KH |
4682 | SAVE_MODIFF = MODIFF; |
4683 | ||
4684 | return Qnil; | |
4685 | } | |
570d7624 JB |
4686 | |
4687 | if (!auto_saving) | |
6b61353c | 4688 | message_with_string ((INTEGERP (append) |
0c328a0e RS |
4689 | ? "Updated %s" |
4690 | : ! NILP (append) | |
4691 | ? "Added to %s" | |
4692 | : "Wrote %s"), | |
4693 | visit_file, 1); | |
570d7624 JB |
4694 | |
4695 | return Qnil; | |
4696 | } | |
ec7adf26 | 4697 | \f |
dd4c5104 | 4698 | Lisp_Object merge (Lisp_Object, Lisp_Object, Lisp_Object); |
d6a3cc15 RS |
4699 | |
4700 | DEFUN ("car-less-than-car", Fcar_less_than_car, Scar_less_than_car, 2, 2, 0, | |
8c1a1077 | 4701 | doc: /* Return t if (car A) is numerically less than (car B). */) |
5842a27b | 4702 | (Lisp_Object a, Lisp_Object b) |
d6a3cc15 RS |
4703 | { |
4704 | return Flss (Fcar (a), Fcar (b)); | |
4705 | } | |
4706 | ||
4707 | /* Build the complete list of annotations appropriate for writing out | |
4708 | the text between START and END, by calling all the functions in | |
6fc6f94b RS |
4709 | write-region-annotate-functions and merging the lists they return. |
4710 | If one of these functions switches to a different buffer, we assume | |
4711 | that buffer contains altered text. Therefore, the caller must | |
4712 | make sure to restore the current buffer in all cases, | |
4713 | as save-excursion would do. */ | |
d6a3cc15 RS |
4714 | |
4715 | static Lisp_Object | |
971de7fb | 4716 | build_annotations (Lisp_Object start, Lisp_Object end) |
d6a3cc15 RS |
4717 | { |
4718 | Lisp_Object annotations; | |
4719 | Lisp_Object p, res; | |
4720 | struct gcpro gcpro1, gcpro2; | |
0a20b684 | 4721 | Lisp_Object original_buffer; |
bd235610 | 4722 | int i, used_global = 0; |
0a20b684 RS |
4723 | |
4724 | XSETBUFFER (original_buffer, current_buffer); | |
d6a3cc15 RS |
4725 | |
4726 | annotations = Qnil; | |
4727 | p = Vwrite_region_annotate_functions; | |
4728 | GCPRO2 (annotations, p); | |
28c3eb5a | 4729 | while (CONSP (p)) |
d6a3cc15 | 4730 | { |
6fc6f94b | 4731 | struct buffer *given_buffer = current_buffer; |
bd235610 SM |
4732 | if (EQ (Qt, XCAR (p)) && !used_global) |
4733 | { /* Use the global value of the hook. */ | |
4734 | Lisp_Object arg[2]; | |
4735 | used_global = 1; | |
4736 | arg[0] = Fdefault_value (Qwrite_region_annotate_functions); | |
4737 | arg[1] = XCDR (p); | |
4738 | p = Fappend (2, arg); | |
4739 | continue; | |
4740 | } | |
6fc6f94b | 4741 | Vwrite_region_annotations_so_far = annotations; |
28c3eb5a | 4742 | res = call2 (XCAR (p), start, end); |
6fc6f94b RS |
4743 | /* If the function makes a different buffer current, |
4744 | assume that means this buffer contains altered text to be output. | |
4745 | Reset START and END from the buffer bounds | |
4746 | and discard all previous annotations because they should have | |
4747 | been dealt with by this function. */ | |
4748 | if (current_buffer != given_buffer) | |
4749 | { | |
67fbc0cb CY |
4750 | Vwrite_region_annotation_buffers |
4751 | = Fcons (Fcurrent_buffer (), | |
4752 | Vwrite_region_annotation_buffers); | |
3cf29f61 RS |
4753 | XSETFASTINT (start, BEGV); |
4754 | XSETFASTINT (end, ZV); | |
6fc6f94b RS |
4755 | annotations = Qnil; |
4756 | } | |
d6a3cc15 RS |
4757 | Flength (res); /* Check basic validity of return value */ |
4758 | annotations = merge (annotations, res, Qcar_less_than_car); | |
28c3eb5a | 4759 | p = XCDR (p); |
d6a3cc15 | 4760 | } |
0d420e88 BG |
4761 | |
4762 | /* Now do the same for annotation functions implied by the file-format */ | |
4b4deea2 TT |
4763 | if (auto_saving && (!EQ (BVAR (current_buffer, auto_save_file_format), Qt))) |
4764 | p = BVAR (current_buffer, auto_save_file_format); | |
0d420e88 | 4765 | else |
4b4deea2 | 4766 | p = BVAR (current_buffer, file_format); |
28c3eb5a | 4767 | for (i = 0; CONSP (p); p = XCDR (p), ++i) |
0d420e88 BG |
4768 | { |
4769 | struct buffer *given_buffer = current_buffer; | |
efdc16c9 | 4770 | |
0d420e88 | 4771 | Vwrite_region_annotations_so_far = annotations; |
532ed661 GM |
4772 | |
4773 | /* Value is either a list of annotations or nil if the function | |
4774 | has written annotations to a temporary buffer, which is now | |
4775 | current. */ | |
28c3eb5a | 4776 | res = call5 (Qformat_annotate_function, XCAR (p), start, end, |
532ed661 | 4777 | original_buffer, make_number (i)); |
0d420e88 BG |
4778 | if (current_buffer != given_buffer) |
4779 | { | |
3cf29f61 RS |
4780 | XSETFASTINT (start, BEGV); |
4781 | XSETFASTINT (end, ZV); | |
0d420e88 BG |
4782 | annotations = Qnil; |
4783 | } | |
efdc16c9 | 4784 | |
532ed661 GM |
4785 | if (CONSP (res)) |
4786 | annotations = merge (annotations, res, Qcar_less_than_car); | |
0d420e88 | 4787 | } |
6fdaa9a0 | 4788 | |
236a12f2 SM |
4789 | UNGCPRO; |
4790 | return annotations; | |
4791 | } | |
4792 | ||
ec7adf26 | 4793 | \f |
ce51c54c KH |
4794 | /* Write to descriptor DESC the NCHARS chars starting at POS of STRING. |
4795 | If STRING is nil, POS is the character position in the current buffer. | |
d6a3cc15 | 4796 | Intersperse with them the annotations from *ANNOT |
ce51c54c | 4797 | which fall within the range of POS to POS + NCHARS, |
d6a3cc15 RS |
4798 | each at its appropriate position. |
4799 | ||
ec7adf26 RS |
4800 | We modify *ANNOT by discarding elements as we use them up. |
4801 | ||
d6a3cc15 RS |
4802 | The return value is negative in case of system call failure. */ |
4803 | ||
ec7adf26 | 4804 | static int |
8a2cbd72 EZ |
4805 | a_write (int desc, Lisp_Object string, EMACS_INT pos, |
4806 | register EMACS_INT nchars, Lisp_Object *annot, | |
4807 | struct coding_system *coding) | |
d6a3cc15 RS |
4808 | { |
4809 | Lisp_Object tem; | |
8a2cbd72 EZ |
4810 | EMACS_INT nextpos; |
4811 | EMACS_INT lastpos = pos + nchars; | |
d6a3cc15 | 4812 | |
eb15aa18 | 4813 | while (NILP (*annot) || CONSP (*annot)) |
d6a3cc15 RS |
4814 | { |
4815 | tem = Fcar_safe (Fcar (*annot)); | |
ce51c54c | 4816 | nextpos = pos - 1; |
ec7adf26 | 4817 | if (INTEGERP (tem)) |
ce51c54c | 4818 | nextpos = XFASTINT (tem); |
ec7adf26 RS |
4819 | |
4820 | /* If there are no more annotations in this range, | |
4821 | output the rest of the range all at once. */ | |
ce51c54c KH |
4822 | if (! (nextpos >= pos && nextpos <= lastpos)) |
4823 | return e_write (desc, string, pos, lastpos, coding); | |
ec7adf26 RS |
4824 | |
4825 | /* Output buffer text up to the next annotation's position. */ | |
ce51c54c | 4826 | if (nextpos > pos) |
d6a3cc15 | 4827 | { |
055a28c9 | 4828 | if (0 > e_write (desc, string, pos, nextpos, coding)) |
d6a3cc15 | 4829 | return -1; |
ce51c54c | 4830 | pos = nextpos; |
d6a3cc15 | 4831 | } |
ec7adf26 | 4832 | /* Output the annotation. */ |
d6a3cc15 RS |
4833 | tem = Fcdr (Fcar (*annot)); |
4834 | if (STRINGP (tem)) | |
4835 | { | |
d5db4077 | 4836 | if (0 > e_write (desc, tem, 0, SCHARS (tem), coding)) |
d6a3cc15 RS |
4837 | return -1; |
4838 | } | |
4839 | *annot = Fcdr (*annot); | |
4840 | } | |
dfcf069d | 4841 | return 0; |
d6a3cc15 RS |
4842 | } |
4843 | ||
6fdaa9a0 | 4844 | |
ce51c54c KH |
4845 | /* Write text in the range START and END into descriptor DESC, |
4846 | encoding them with coding system CODING. If STRING is nil, START | |
4847 | and END are character positions of the current buffer, else they | |
4848 | are indexes to the string STRING. */ | |
ec7adf26 RS |
4849 | |
4850 | static int | |
8a2cbd72 EZ |
4851 | e_write (int desc, Lisp_Object string, EMACS_INT start, EMACS_INT end, |
4852 | struct coding_system *coding) | |
570d7624 | 4853 | { |
ce51c54c KH |
4854 | if (STRINGP (string)) |
4855 | { | |
db327c7e | 4856 | start = 0; |
8f924df7 | 4857 | end = SCHARS (string); |
ce51c54c | 4858 | } |
570d7624 | 4859 | |
6fdaa9a0 KH |
4860 | /* We used to have a code for handling selective display here. But, |
4861 | now it is handled within encode_coding. */ | |
01ca97a2 KH |
4862 | |
4863 | while (start < end) | |
570d7624 | 4864 | { |
01ca97a2 | 4865 | if (STRINGP (string)) |
6ad568dd | 4866 | { |
01ca97a2 KH |
4867 | coding->src_multibyte = SCHARS (string) < SBYTES (string); |
4868 | if (CODING_REQUIRE_ENCODING (coding)) | |
4869 | { | |
4870 | encode_coding_object (coding, string, | |
4871 | start, string_char_to_byte (string, start), | |
4872 | end, string_char_to_byte (string, end), Qt); | |
4873 | } | |
4874 | else | |
4875 | { | |
4876 | coding->dst_object = string; | |
4877 | coding->consumed_char = SCHARS (string); | |
4878 | coding->produced = SBYTES (string); | |
4879 | } | |
6ad568dd | 4880 | } |
db327c7e | 4881 | else |
6ad568dd | 4882 | { |
8a2cbd72 EZ |
4883 | EMACS_INT start_byte = CHAR_TO_BYTE (start); |
4884 | EMACS_INT end_byte = CHAR_TO_BYTE (end); | |
b4132433 | 4885 | |
01ca97a2 KH |
4886 | coding->src_multibyte = (end - start) < (end_byte - start_byte); |
4887 | if (CODING_REQUIRE_ENCODING (coding)) | |
4888 | { | |
4889 | encode_coding_object (coding, Fcurrent_buffer (), | |
4890 | start, start_byte, end, end_byte, Qt); | |
4891 | } | |
4892 | else | |
4893 | { | |
4894 | coding->dst_object = Qnil; | |
4895 | coding->dst_pos_byte = start_byte; | |
4896 | if (start >= GPT || end <= GPT) | |
4897 | { | |
4898 | coding->consumed_char = end - start; | |
4899 | coding->produced = end_byte - start_byte; | |
4900 | } | |
4901 | else | |
4902 | { | |
4903 | coding->consumed_char = GPT - start; | |
4904 | coding->produced = GPT_BYTE - start_byte; | |
4905 | } | |
4906 | } | |
c185d744 | 4907 | } |
01ca97a2 KH |
4908 | |
4909 | if (coding->produced > 0) | |
c185d744 | 4910 | { |
01ca97a2 KH |
4911 | coding->produced -= |
4912 | emacs_write (desc, | |
4913 | STRINGP (coding->dst_object) | |
42a5b22f PE |
4914 | ? SSDATA (coding->dst_object) |
4915 | : (char *) BYTE_POS_ADDR (coding->dst_pos_byte), | |
01ca97a2 KH |
4916 | coding->produced); |
4917 | ||
4918 | if (coding->produced) | |
4919 | return -1; | |
570d7624 | 4920 | } |
01ca97a2 | 4921 | start += coding->consumed_char; |
c185d744 KH |
4922 | } |
4923 | ||
4924 | return 0; | |
570d7624 | 4925 | } |
ec7adf26 | 4926 | \f |
a7ca3326 | 4927 | DEFUN ("verify-visited-file-modtime", Fverify_visited_file_modtime, |
ec1b9b17 | 4928 | Sverify_visited_file_modtime, 0, 1, 0, |
8c1a1077 | 4929 | doc: /* Return t if last mod time of BUF's visited file matches what BUF records. |
6b61353c | 4930 | This means that the file has not been changed since it was visited or saved. |
ec1b9b17 | 4931 | If BUF is omitted or nil, it defaults to the current buffer. |
6b61353c | 4932 | See Info node `(elisp)Modification Time' for more details. */) |
5842a27b | 4933 | (Lisp_Object buf) |
570d7624 JB |
4934 | { |
4935 | struct buffer *b; | |
4936 | struct stat st; | |
32f4334d | 4937 | Lisp_Object handler; |
b1d1b865 | 4938 | Lisp_Object filename; |
570d7624 | 4939 | |
ec1b9b17 GM |
4940 | if (NILP (buf)) |
4941 | b = current_buffer; | |
4942 | else | |
4943 | { | |
4944 | CHECK_BUFFER (buf); | |
4945 | b = XBUFFER (buf); | |
4946 | } | |
570d7624 | 4947 | |
4b4deea2 | 4948 | if (!STRINGP (BVAR (b, filename))) return Qt; |
570d7624 JB |
4949 | if (b->modtime == 0) return Qt; |
4950 | ||
32f4334d RS |
4951 | /* If the file name has special constructs in it, |
4952 | call the corresponding file handler. */ | |
4b4deea2 | 4953 | handler = Ffind_file_name_handler (BVAR (b, filename), |
49307295 | 4954 | Qverify_visited_file_modtime); |
32f4334d | 4955 | if (!NILP (handler)) |
09121adc | 4956 | return call2 (handler, Qverify_visited_file_modtime, buf); |
32f4334d | 4957 | |
4b4deea2 | 4958 | filename = ENCODE_FILE (BVAR (b, filename)); |
b1d1b865 | 4959 | |
42a5b22f | 4960 | if (stat (SSDATA (filename), &st) < 0) |
570d7624 JB |
4961 | { |
4962 | /* If the file doesn't exist now and didn't exist before, | |
4963 | we say that it isn't modified, provided the error is a tame one. */ | |
4964 | if (errno == ENOENT || errno == EACCES || errno == ENOTDIR) | |
4965 | st.st_mtime = -1; | |
4966 | else | |
4967 | st.st_mtime = 0; | |
4968 | } | |
58b963f7 SM |
4969 | if ((st.st_mtime == b->modtime |
4970 | /* If both are positive, accept them if they are off by one second. */ | |
4971 | || (st.st_mtime > 0 && b->modtime > 0 | |
7f9bbdbb | 4972 | && (st.st_mtime - 1 == b->modtime |
58b963f7 SM |
4973 | || st.st_mtime == b->modtime - 1))) |
4974 | && (st.st_size == b->modtime_size | |
4975 | || b->modtime_size < 0)) | |
570d7624 JB |
4976 | return Qt; |
4977 | return Qnil; | |
4978 | } | |
4979 | ||
4980 | DEFUN ("clear-visited-file-modtime", Fclear_visited_file_modtime, | |
8c1a1077 PJ |
4981 | Sclear_visited_file_modtime, 0, 0, 0, |
4982 | doc: /* Clear out records of last mod time of visited file. | |
4983 | Next attempt to save will certainly not complain of a discrepancy. */) | |
5842a27b | 4984 | (void) |
570d7624 JB |
4985 | { |
4986 | current_buffer->modtime = 0; | |
58b963f7 | 4987 | current_buffer->modtime_size = -1; |
570d7624 JB |
4988 | return Qnil; |
4989 | } | |
4990 | ||
f5d5eccf | 4991 | DEFUN ("visited-file-modtime", Fvisited_file_modtime, |
8c1a1077 PJ |
4992 | Svisited_file_modtime, 0, 0, 0, |
4993 | doc: /* Return the current buffer's recorded visited file modification time. | |
e5fcddc8 | 4994 | The value is a list of the form (HIGH LOW), like the time values |
6b61353c KH |
4995 | that `file-attributes' returns. If the current buffer has no recorded |
4996 | file modification time, this function returns 0. | |
4997 | See Info node `(elisp)Modification Time' for more details. */) | |
5842a27b | 4998 | (void) |
f5d5eccf | 4999 | { |
73ff9d42 RS |
5000 | if (! current_buffer->modtime) |
5001 | return make_number (0); | |
84acfcf0 | 5002 | return make_time (current_buffer->modtime); |
f5d5eccf RS |
5003 | } |
5004 | ||
570d7624 | 5005 | DEFUN ("set-visited-file-modtime", Fset_visited_file_modtime, |
8c1a1077 PJ |
5006 | Sset_visited_file_modtime, 0, 1, 0, |
5007 | doc: /* Update buffer's recorded modification time from the visited file's time. | |
5008 | Useful if the buffer was not read from the file normally | |
5009 | or if the file itself has been changed for some known benign reason. | |
5010 | An argument specifies the modification time value to use | |
5011 | \(instead of that of the visited file), in the form of a list | |
5012 | \(HIGH . LOW) or (HIGH LOW). */) | |
5842a27b | 5013 | (Lisp_Object time_list) |
570d7624 | 5014 | { |
f5d5eccf | 5015 | if (!NILP (time_list)) |
58b963f7 | 5016 | { |
be44ca6c | 5017 | CONS_TO_INTEGER (time_list, time_t, current_buffer->modtime); |
58b963f7 SM |
5018 | current_buffer->modtime_size = -1; |
5019 | } | |
f5d5eccf RS |
5020 | else |
5021 | { | |
5022 | register Lisp_Object filename; | |
5023 | struct stat st; | |
5024 | Lisp_Object handler; | |
570d7624 | 5025 | |
4b4deea2 | 5026 | filename = Fexpand_file_name (BVAR (current_buffer, filename), Qnil); |
32f4334d | 5027 | |
f5d5eccf RS |
5028 | /* If the file name has special constructs in it, |
5029 | call the corresponding file handler. */ | |
49307295 | 5030 | handler = Ffind_file_name_handler (filename, Qset_visited_file_modtime); |
f5d5eccf | 5031 | if (!NILP (handler)) |
caf3c431 | 5032 | /* The handler can find the file name the same way we did. */ |
76c881b0 | 5033 | return call2 (handler, Qset_visited_file_modtime, Qnil); |
b1d1b865 RS |
5034 | |
5035 | filename = ENCODE_FILE (filename); | |
5036 | ||
42a5b22f | 5037 | if (stat (SSDATA (filename), &st) >= 0) |
58b963f7 SM |
5038 | { |
5039 | current_buffer->modtime = st.st_mtime; | |
5040 | current_buffer->modtime_size = st.st_size; | |
5041 | } | |
f5d5eccf | 5042 | } |
570d7624 JB |
5043 | |
5044 | return Qnil; | |
5045 | } | |
5046 | \f | |
f14b7e14 | 5047 | static Lisp_Object |
f839df0c | 5048 | auto_save_error (Lisp_Object error_val) |
570d7624 | 5049 | { |
d7f31e22 GM |
5050 | Lisp_Object args[3], msg; |
5051 | int i, nbytes; | |
5052 | struct gcpro gcpro1; | |
dfc22242 KS |
5053 | char *msgbuf; |
5054 | USE_SAFE_ALLOCA; | |
efdc16c9 | 5055 | |
ca730bf0 CY |
5056 | auto_save_error_occurred = 1; |
5057 | ||
385ed61f | 5058 | ring_bell (XFRAME (selected_frame)); |
efdc16c9 | 5059 | |
d7f31e22 | 5060 | args[0] = build_string ("Auto-saving %s: %s"); |
4b4deea2 | 5061 | args[1] = BVAR (current_buffer, name); |
f839df0c | 5062 | args[2] = Ferror_message_string (error_val); |
d7f31e22 GM |
5063 | msg = Fformat (3, args); |
5064 | GCPRO1 (msg); | |
d5db4077 | 5065 | nbytes = SBYTES (msg); |
dfc22242 | 5066 | SAFE_ALLOCA (msgbuf, char *, nbytes); |
72af86bd | 5067 | memcpy (msgbuf, SDATA (msg), nbytes); |
d7f31e22 GM |
5068 | |
5069 | for (i = 0; i < 3; ++i) | |
5070 | { | |
5071 | if (i == 0) | |
dfc22242 | 5072 | message2 (msgbuf, nbytes, STRING_MULTIBYTE (msg)); |
d7f31e22 | 5073 | else |
dfc22242 | 5074 | message2_nolog (msgbuf, nbytes, STRING_MULTIBYTE (msg)); |
d7f31e22 GM |
5075 | Fsleep_for (make_number (1), Qnil); |
5076 | } | |
5077 | ||
e01f7773 | 5078 | SAFE_FREE (); |
d7f31e22 | 5079 | UNGCPRO; |
570d7624 JB |
5080 | return Qnil; |
5081 | } | |
5082 | ||
f14b7e14 | 5083 | static Lisp_Object |
971de7fb | 5084 | auto_save_1 (void) |
570d7624 | 5085 | { |
570d7624 | 5086 | struct stat st; |
d4a42098 KS |
5087 | Lisp_Object modes; |
5088 | ||
5089 | auto_save_mode_bits = 0666; | |
570d7624 JB |
5090 | |
5091 | /* Get visited file's mode to become the auto save file's mode. */ | |
4b4deea2 | 5092 | if (! NILP (BVAR (current_buffer, filename))) |
d4a42098 | 5093 | { |
4b4deea2 | 5094 | if (stat (SSDATA (BVAR (current_buffer, filename)), &st) >= 0) |
d4a42098 KS |
5095 | /* But make sure we can overwrite it later! */ |
5096 | auto_save_mode_bits = st.st_mode | 0600; | |
4b4deea2 | 5097 | else if ((modes = Ffile_modes (BVAR (current_buffer, filename)), |
d4a42098 KS |
5098 | INTEGERP (modes))) |
5099 | /* Remote files don't cooperate with stat. */ | |
5100 | auto_save_mode_bits = XINT (modes) | 0600; | |
5101 | } | |
570d7624 JB |
5102 | |
5103 | return | |
4b4deea2 | 5104 | Fwrite_region (Qnil, Qnil, BVAR (current_buffer, auto_save_file_name), Qnil, |
699b53bc CY |
5105 | NILP (Vauto_save_visited_file_name) ? Qlambda : Qt, |
5106 | Qnil, Qnil); | |
570d7624 JB |
5107 | } |
5108 | ||
e54d3b5d | 5109 | static Lisp_Object |
971de7fb | 5110 | do_auto_save_unwind (Lisp_Object arg) /* used as unwind-protect function */ |
410ed5c3 | 5111 | |
e54d3b5d | 5112 | { |
fff7e982 | 5113 | FILE *stream = (FILE *) XSAVE_VALUE (arg)->pointer; |
3be3c08e | 5114 | auto_saving = 0; |
fff7e982 | 5115 | if (stream != NULL) |
aab12958 YM |
5116 | { |
5117 | BLOCK_INPUT; | |
5118 | fclose (stream); | |
5119 | UNBLOCK_INPUT; | |
5120 | } | |
e54d3b5d RS |
5121 | return Qnil; |
5122 | } | |
5123 | ||
a8c828be | 5124 | static Lisp_Object |
971de7fb | 5125 | do_auto_save_unwind_1 (Lisp_Object value) /* used as unwind-protect function */ |
410ed5c3 | 5126 | |
a8c828be RS |
5127 | { |
5128 | minibuffer_auto_raise = XINT (value); | |
5129 | return Qnil; | |
5130 | } | |
5131 | ||
5794dd61 | 5132 | static Lisp_Object |
971de7fb | 5133 | do_auto_save_make_dir (Lisp_Object dir) |
5794dd61 | 5134 | { |
26816cbf SG |
5135 | Lisp_Object mode; |
5136 | ||
5137 | call2 (Qmake_directory, dir, Qt); | |
5138 | XSETFASTINT (mode, 0700); | |
5139 | return Fset_file_modes (dir, mode); | |
5794dd61 RS |
5140 | } |
5141 | ||
5142 | static Lisp_Object | |
971de7fb | 5143 | do_auto_save_eh (Lisp_Object ignore) |
5794dd61 RS |
5144 | { |
5145 | return Qnil; | |
5146 | } | |
5147 | ||
a7ca3326 | 5148 | DEFUN ("do-auto-save", Fdo_auto_save, Sdo_auto_save, 0, 2, "", |
8c1a1077 PJ |
5149 | doc: /* Auto-save all buffers that need it. |
5150 | This is all buffers that have auto-saving enabled | |
5151 | and are changed since last auto-saved. | |
5152 | Auto-saving writes the buffer into a file | |
5153 | so that your editing is not lost if the system crashes. | |
5154 | This file is not the file you visited; that changes only when you save. | |
5155 | Normally we run the normal hook `auto-save-hook' before saving. | |
5156 | ||
5157 | A non-nil NO-MESSAGE argument means do not print any message if successful. | |
5158 | A non-nil CURRENT-ONLY argument means save only current buffer. */) | |
5842a27b | 5159 | (Lisp_Object no_message, Lisp_Object current_only) |
570d7624 JB |
5160 | { |
5161 | struct buffer *old = current_buffer, *b; | |
dee091a3 | 5162 | Lisp_Object tail, buf, hook; |
570d7624 | 5163 | int auto_saved = 0; |
f14b1c68 | 5164 | int do_handled_files; |
ff4c9993 | 5165 | Lisp_Object oquit; |
fff7e982 | 5166 | FILE *stream = NULL; |
aed13378 | 5167 | int count = SPECPDL_INDEX (); |
a8c828be | 5168 | int orig_minibuffer_auto_raise = minibuffer_auto_raise; |
5794dd61 | 5169 | int old_message_p = 0; |
d57563b6 | 5170 | struct gcpro gcpro1, gcpro2; |
38da540d RS |
5171 | |
5172 | if (max_specpdl_size < specpdl_size + 40) | |
5173 | max_specpdl_size = specpdl_size + 40; | |
5174 | ||
5175 | if (minibuf_level) | |
5176 | no_message = Qt; | |
5177 | ||
5794dd61 RS |
5178 | if (NILP (no_message)) |
5179 | { | |
5180 | old_message_p = push_message (); | |
5181 | record_unwind_protect (pop_message_unwind, Qnil); | |
5182 | } | |
efdc16c9 | 5183 | |
ff4c9993 RS |
5184 | /* Ordinarily don't quit within this function, |
5185 | but don't make it impossible to quit (in case we get hung in I/O). */ | |
5186 | oquit = Vquit_flag; | |
5187 | Vquit_flag = Qnil; | |
570d7624 JB |
5188 | |
5189 | /* No GCPRO needed, because (when it matters) all Lisp_Object variables | |
5190 | point to non-strings reached from Vbuffer_alist. */ | |
5191 | ||
dee091a3 JD |
5192 | hook = intern ("auto-save-hook"); |
5193 | Frun_hooks (1, &hook); | |
570d7624 | 5194 | |
e54d3b5d RS |
5195 | if (STRINGP (Vauto_save_list_file_name)) |
5196 | { | |
0894672f | 5197 | Lisp_Object listfile; |
efdc16c9 | 5198 | |
258fd2cb | 5199 | listfile = Fexpand_file_name (Vauto_save_list_file_name, Qnil); |
0894672f GM |
5200 | |
5201 | /* Don't try to create the directory when shutting down Emacs, | |
5202 | because creating the directory might signal an error, and | |
5203 | that would leave Emacs in a strange state. */ | |
5204 | if (!NILP (Vrun_hooks)) | |
5205 | { | |
5206 | Lisp_Object dir; | |
d57563b6 RS |
5207 | dir = Qnil; |
5208 | GCPRO2 (dir, listfile); | |
0894672f GM |
5209 | dir = Ffile_name_directory (listfile); |
5210 | if (NILP (Ffile_directory_p (dir))) | |
5794dd61 RS |
5211 | internal_condition_case_1 (do_auto_save_make_dir, |
5212 | dir, Fcons (Fcons (Qfile_error, Qnil), Qnil), | |
5213 | do_auto_save_eh); | |
d57563b6 | 5214 | UNGCPRO; |
0894672f | 5215 | } |
efdc16c9 | 5216 | |
42a5b22f | 5217 | stream = fopen (SSDATA (listfile), "w"); |
1b335d29 | 5218 | } |
199607e4 | 5219 | |
fff7e982 KS |
5220 | record_unwind_protect (do_auto_save_unwind, |
5221 | make_save_value (stream, 0)); | |
a8c828be RS |
5222 | record_unwind_protect (do_auto_save_unwind_1, |
5223 | make_number (minibuffer_auto_raise)); | |
5224 | minibuffer_auto_raise = 0; | |
3be3c08e | 5225 | auto_saving = 1; |
ca730bf0 | 5226 | auto_save_error_occurred = 0; |
3be3c08e | 5227 | |
6b61353c KH |
5228 | /* On first pass, save all files that don't have handlers. |
5229 | On second pass, save all files that do have handlers. | |
5230 | ||
5231 | If Emacs is crashing, the handlers may tweak what is causing | |
5232 | Emacs to crash in the first place, and it would be a shame if | |
5233 | Emacs failed to autosave perfectly ordinary files because it | |
5234 | couldn't handle some ange-ftp'd file. */ | |
5235 | ||
f14b1c68 | 5236 | for (do_handled_files = 0; do_handled_files < 2; do_handled_files++) |
8e50cc2d | 5237 | for (tail = Vbuffer_alist; CONSP (tail); tail = XCDR (tail)) |
f14b1c68 | 5238 | { |
03699b14 | 5239 | buf = XCDR (XCAR (tail)); |
f14b1c68 | 5240 | b = XBUFFER (buf); |
199607e4 | 5241 | |
e54d3b5d | 5242 | /* Record all the buffers that have auto save mode |
258fd2cb RS |
5243 | in the special file that lists them. For each of these buffers, |
5244 | Record visited name (if any) and auto save name. */ | |
4b4deea2 | 5245 | if (STRINGP (BVAR (b, auto_save_file_name)) |
1b335d29 | 5246 | && stream != NULL && do_handled_files == 0) |
e54d3b5d | 5247 | { |
aab12958 | 5248 | BLOCK_INPUT; |
4b4deea2 | 5249 | if (!NILP (BVAR (b, filename))) |
258fd2cb | 5250 | { |
4b4deea2 TT |
5251 | fwrite (SDATA (BVAR (b, filename)), 1, |
5252 | SBYTES (BVAR (b, filename)), stream); | |
258fd2cb | 5253 | } |
1b335d29 | 5254 | putc ('\n', stream); |
4b4deea2 TT |
5255 | fwrite (SDATA (BVAR (b, auto_save_file_name)), 1, |
5256 | SBYTES (BVAR (b, auto_save_file_name)), stream); | |
1b335d29 | 5257 | putc ('\n', stream); |
aab12958 | 5258 | UNBLOCK_INPUT; |
e54d3b5d | 5259 | } |
17857782 | 5260 | |
f14b1c68 JB |
5261 | if (!NILP (current_only) |
5262 | && b != current_buffer) | |
5263 | continue; | |
e54d3b5d | 5264 | |
95385625 RS |
5265 | /* Don't auto-save indirect buffers. |
5266 | The base buffer takes care of it. */ | |
5267 | if (b->base_buffer) | |
5268 | continue; | |
5269 | ||
f14b1c68 JB |
5270 | /* Check for auto save enabled |
5271 | and file changed since last auto save | |
5272 | and file changed since last real save. */ | |
4b4deea2 | 5273 | if (STRINGP (BVAR (b, auto_save_file_name)) |
95385625 | 5274 | && BUF_SAVE_MODIFF (b) < BUF_MODIFF (b) |
0b5397c2 | 5275 | && BUF_AUTOSAVE_MODIFF (b) < BUF_MODIFF (b) |
82c2d839 | 5276 | /* -1 means we've turned off autosaving for a while--see below. */ |
4b4deea2 | 5277 | && XINT (BVAR (b, save_length)) >= 0 |
f14b1c68 | 5278 | && (do_handled_files |
4b4deea2 | 5279 | || NILP (Ffind_file_name_handler (BVAR (b, auto_save_file_name), |
49307295 | 5280 | Qwrite_region)))) |
f14b1c68 | 5281 | { |
b60247d9 RS |
5282 | EMACS_TIME before_time, after_time; |
5283 | ||
5284 | EMACS_GET_TIME (before_time); | |
5285 | ||
5286 | /* If we had a failure, don't try again for 20 minutes. */ | |
5287 | if (b->auto_save_failure_time >= 0 | |
5288 | && EMACS_SECS (before_time) - b->auto_save_failure_time < 1200) | |
5289 | continue; | |
5290 | ||
090101cf CY |
5291 | set_buffer_internal (b); |
5292 | if (NILP (Vauto_save_include_big_deletions) | |
4b4deea2 | 5293 | && (XFASTINT (BVAR (b, save_length)) * 10 |
4be941e3 | 5294 | > (BUF_Z (b) - BUF_BEG (b)) * 13) |
f14b1c68 JB |
5295 | /* A short file is likely to change a large fraction; |
5296 | spare the user annoying messages. */ | |
4b4deea2 | 5297 | && XFASTINT (BVAR (b, save_length)) > 5000 |
f14b1c68 | 5298 | /* These messages are frequent and annoying for `*mail*'. */ |
4b4deea2 | 5299 | && !EQ (BVAR (b, filename), Qnil) |
f14b1c68 JB |
5300 | && NILP (no_message)) |
5301 | { | |
5302 | /* It has shrunk too much; turn off auto-saving here. */ | |
a8c828be | 5303 | minibuffer_auto_raise = orig_minibuffer_auto_raise; |
fd91d0d4 | 5304 | message_with_string ("Buffer %s has shrunk a lot; auto save disabled in that buffer until next real save", |
4b4deea2 | 5305 | BVAR (b, name), 1); |
a8c828be | 5306 | minibuffer_auto_raise = 0; |
82c2d839 RS |
5307 | /* Turn off auto-saving until there's a real save, |
5308 | and prevent any more warnings. */ | |
4b4deea2 | 5309 | XSETINT (BVAR (b, save_length), -1); |
f14b1c68 JB |
5310 | Fsleep_for (make_number (1), Qnil); |
5311 | continue; | |
5312 | } | |
f14b1c68 JB |
5313 | if (!auto_saved && NILP (no_message)) |
5314 | message1 ("Auto-saving..."); | |
5315 | internal_condition_case (auto_save_1, Qt, auto_save_error); | |
5316 | auto_saved++; | |
0b5397c2 | 5317 | BUF_AUTOSAVE_MODIFF (b) = BUF_MODIFF (b); |
4b4deea2 | 5318 | XSETFASTINT (BVAR (current_buffer, save_length), Z - BEG); |
f14b1c68 | 5319 | set_buffer_internal (old); |
b60247d9 RS |
5320 | |
5321 | EMACS_GET_TIME (after_time); | |
5322 | ||
5323 | /* If auto-save took more than 60 seconds, | |
5324 | assume it was an NFS failure that got a timeout. */ | |
5325 | if (EMACS_SECS (after_time) - EMACS_SECS (before_time) > 60) | |
5326 | b->auto_save_failure_time = EMACS_SECS (after_time); | |
f14b1c68 JB |
5327 | } |
5328 | } | |
570d7624 | 5329 | |
b67f2ca5 RS |
5330 | /* Prevent another auto save till enough input events come in. */ |
5331 | record_auto_save (); | |
570d7624 | 5332 | |
17857782 | 5333 | if (auto_saved && NILP (no_message)) |
f05b275b | 5334 | { |
5794dd61 | 5335 | if (old_message_p) |
31f3d831 | 5336 | { |
5794dd61 RS |
5337 | /* If we are going to restore an old message, |
5338 | give time to read ours. */ | |
83f8d903 | 5339 | sit_for (make_number (1), 0, 0); |
c71106e5 | 5340 | restore_message (); |
31f3d831 | 5341 | } |
ca730bf0 | 5342 | else if (!auto_save_error_occurred) |
31e31a15 CY |
5343 | /* Don't overwrite the error message if an error occurred. |
5344 | If we displayed a message and then restored a state | |
5794dd61 | 5345 | with no message, leave a "done" message on the screen. */ |
f05b275b KH |
5346 | message1 ("Auto-saving...done"); |
5347 | } | |
570d7624 | 5348 | |
ff4c9993 RS |
5349 | Vquit_flag = oquit; |
5350 | ||
5794dd61 | 5351 | /* This restores the message-stack status. */ |
e54d3b5d | 5352 | unbind_to (count, Qnil); |
570d7624 JB |
5353 | return Qnil; |
5354 | } | |
5355 | ||
5356 | DEFUN ("set-buffer-auto-saved", Fset_buffer_auto_saved, | |
8c1a1077 PJ |
5357 | Sset_buffer_auto_saved, 0, 0, 0, |
5358 | doc: /* Mark current buffer as auto-saved with its current text. | |
5359 | No auto-save file will be written until the buffer changes again. */) | |
5842a27b | 5360 | (void) |
570d7624 | 5361 | { |
0b5397c2 SM |
5362 | /* FIXME: This should not be called in indirect buffers, since |
5363 | they're not autosaved. */ | |
5364 | BUF_AUTOSAVE_MODIFF (current_buffer) = MODIFF; | |
4b4deea2 | 5365 | XSETFASTINT (BVAR (current_buffer, save_length), Z - BEG); |
b60247d9 RS |
5366 | current_buffer->auto_save_failure_time = -1; |
5367 | return Qnil; | |
5368 | } | |
5369 | ||
5370 | DEFUN ("clear-buffer-auto-save-failure", Fclear_buffer_auto_save_failure, | |
8c1a1077 PJ |
5371 | Sclear_buffer_auto_save_failure, 0, 0, 0, |
5372 | doc: /* Clear any record of a recent auto-save failure in the current buffer. */) | |
5842a27b | 5373 | (void) |
b60247d9 RS |
5374 | { |
5375 | current_buffer->auto_save_failure_time = -1; | |
570d7624 JB |
5376 | return Qnil; |
5377 | } | |
5378 | ||
5379 | DEFUN ("recent-auto-save-p", Frecent_auto_save_p, Srecent_auto_save_p, | |
8c1a1077 | 5380 | 0, 0, 0, |
68780e2a RS |
5381 | doc: /* Return t if current buffer has been auto-saved recently. |
5382 | More precisely, if it has been auto-saved since last read from or saved | |
5383 | in the visited file. If the buffer has no visited file, | |
5384 | then any auto-save counts as "recent". */) | |
5842a27b | 5385 | (void) |
570d7624 | 5386 | { |
0b5397c2 SM |
5387 | /* FIXME: maybe we should return nil for indirect buffers since |
5388 | they're never autosaved. */ | |
5389 | return (SAVE_MODIFF < BUF_AUTOSAVE_MODIFF (current_buffer) ? Qt : Qnil); | |
570d7624 JB |
5390 | } |
5391 | \f | |
5392 | /* Reading and completing file names */ | |
6e710ae5 | 5393 | |
88208bb8 JD |
5394 | DEFUN ("next-read-file-uses-dialog-p", Fnext_read_file_uses_dialog_p, |
5395 | Snext_read_file_uses_dialog_p, 0, 0, 0, | |
5396 | doc: /* Return t if a call to `read-file-name' will use a dialog. | |
5397 | The return value is only relevant for a call to `read-file-name' that happens | |
1a0de25c | 5398 | before any other event (mouse or keypress) is handled. */) |
5842a27b | 5399 | (void) |
88208bb8 | 5400 | { |
9e2a2647 | 5401 | #if defined (USE_MOTIF) || defined (HAVE_NTGUI) || defined (USE_GTK) |
88208bb8 JD |
5402 | if ((NILP (last_nonmenu_event) || CONSP (last_nonmenu_event)) |
5403 | && use_dialog_box | |
5404 | && use_file_dialog | |
5405 | && have_menus_p ()) | |
5406 | return Qt; | |
5407 | #endif | |
5408 | return Qnil; | |
5409 | } | |
d4a42098 | 5410 | |
dbd50d4b | 5411 | Lisp_Object |
971de7fb | 5412 | Fread_file_name (Lisp_Object prompt, Lisp_Object dir, Lisp_Object default_filename, Lisp_Object mustmatch, Lisp_Object initial, Lisp_Object predicate) |
570d7624 | 5413 | { |
fd4ead52 | 5414 | struct gcpro gcpro1; |
dbd50d4b | 5415 | Lisp_Object args[7]; |
a79485af | 5416 | |
71e1f69d | 5417 | GCPRO1 (default_filename); |
dbd50d4b SM |
5418 | args[0] = intern ("read-file-name"); |
5419 | args[1] = prompt; | |
5420 | args[2] = dir; | |
5421 | args[3] = default_filename; | |
5422 | args[4] = mustmatch; | |
5423 | args[5] = initial; | |
5424 | args[6] = predicate; | |
5425 | RETURN_UNGCPRO (Ffuncall (7, args)); | |
570d7624 | 5426 | } |
9c856db9 | 5427 | |
570d7624 | 5428 | \f |
dfcf069d | 5429 | void |
971de7fb | 5430 | syms_of_fileio (void) |
570d7624 | 5431 | { |
cd3520a4 JB |
5432 | DEFSYM (Qoperations, "operations"); |
5433 | DEFSYM (Qexpand_file_name, "expand-file-name"); | |
5434 | DEFSYM (Qsubstitute_in_file_name, "substitute-in-file-name"); | |
5435 | DEFSYM (Qdirectory_file_name, "directory-file-name"); | |
5436 | DEFSYM (Qfile_name_directory, "file-name-directory"); | |
5437 | DEFSYM (Qfile_name_nondirectory, "file-name-nondirectory"); | |
5438 | DEFSYM (Qunhandled_file_name_directory, "unhandled-file-name-directory"); | |
5439 | DEFSYM (Qfile_name_as_directory, "file-name-as-directory"); | |
5440 | DEFSYM (Qcopy_file, "copy-file"); | |
5441 | DEFSYM (Qmake_directory_internal, "make-directory-internal"); | |
5442 | DEFSYM (Qmake_directory, "make-directory"); | |
5443 | DEFSYM (Qdelete_directory_internal, "delete-directory-internal"); | |
5444 | DEFSYM (Qdelete_file, "delete-file"); | |
5445 | DEFSYM (Qrename_file, "rename-file"); | |
5446 | DEFSYM (Qadd_name_to_file, "add-name-to-file"); | |
5447 | DEFSYM (Qmake_symbolic_link, "make-symbolic-link"); | |
5448 | DEFSYM (Qfile_exists_p, "file-exists-p"); | |
5449 | DEFSYM (Qfile_executable_p, "file-executable-p"); | |
5450 | DEFSYM (Qfile_readable_p, "file-readable-p"); | |
5451 | DEFSYM (Qfile_writable_p, "file-writable-p"); | |
5452 | DEFSYM (Qfile_symlink_p, "file-symlink-p"); | |
5453 | DEFSYM (Qaccess_file, "access-file"); | |
5454 | DEFSYM (Qfile_directory_p, "file-directory-p"); | |
5455 | DEFSYM (Qfile_regular_p, "file-regular-p"); | |
5456 | DEFSYM (Qfile_accessible_directory_p, "file-accessible-directory-p"); | |
5457 | DEFSYM (Qfile_modes, "file-modes"); | |
5458 | DEFSYM (Qset_file_modes, "set-file-modes"); | |
5459 | DEFSYM (Qset_file_times, "set-file-times"); | |
5460 | DEFSYM (Qfile_selinux_context, "file-selinux-context"); | |
5461 | DEFSYM (Qset_file_selinux_context, "set-file-selinux-context"); | |
5462 | DEFSYM (Qfile_newer_than_file_p, "file-newer-than-file-p"); | |
5463 | DEFSYM (Qinsert_file_contents, "insert-file-contents"); | |
5464 | DEFSYM (Qwrite_region, "write-region"); | |
5465 | DEFSYM (Qverify_visited_file_modtime, "verify-visited-file-modtime"); | |
5466 | DEFSYM (Qset_visited_file_modtime, "set-visited-file-modtime"); | |
5467 | DEFSYM (Qauto_save_coding, "auto-save-coding"); | |
5468 | ||
5469 | DEFSYM (Qfile_name_history, "file-name-history"); | |
642ef245 | 5470 | Fset (Qfile_name_history, Qnil); |
15c65264 | 5471 | |
cd3520a4 JB |
5472 | DEFSYM (Qfile_error, "file-error"); |
5473 | DEFSYM (Qfile_already_exists, "file-already-exists"); | |
5474 | DEFSYM (Qfile_date_error, "file-date-error"); | |
5475 | DEFSYM (Qexcl, "excl"); | |
570d7624 | 5476 | |
29208e82 | 5477 | DEFVAR_LISP ("file-name-coding-system", Vfile_name_coding_system, |
8c1a1077 | 5478 | doc: /* *Coding system for encoding file names. |
346ebf53 | 5479 | If it is nil, `default-file-name-coding-system' (which see) is used. */); |
b1d1b865 RS |
5480 | Vfile_name_coding_system = Qnil; |
5481 | ||
cd913586 | 5482 | DEFVAR_LISP ("default-file-name-coding-system", |
29208e82 | 5483 | Vdefault_file_name_coding_system, |
8c1a1077 | 5484 | doc: /* Default coding system for encoding file names. |
346ebf53 | 5485 | This variable is used only when `file-name-coding-system' is nil. |
8c1a1077 | 5486 | |
346ebf53 | 5487 | This variable is set/changed by the command `set-language-environment'. |
8c1a1077 | 5488 | User should not set this variable manually, |
346ebf53 | 5489 | instead use `file-name-coding-system' to get a constant encoding |
8c1a1077 | 5490 | of file names regardless of the current language environment. */); |
cd913586 KH |
5491 | Vdefault_file_name_coding_system = Qnil; |
5492 | ||
cd3520a4 JB |
5493 | DEFSYM (Qformat_decode, "format-decode"); |
5494 | DEFSYM (Qformat_annotate_function, "format-annotate-function"); | |
5495 | DEFSYM (Qafter_insert_file_set_coding, "after-insert-file-set-coding"); | |
5496 | DEFSYM (Qcar_less_than_car, "car-less-than-car"); | |
d6a3cc15 | 5497 | |
570d7624 | 5498 | Fput (Qfile_error, Qerror_conditions, |
d67b4f80 | 5499 | Fpurecopy (list2 (Qfile_error, Qerror))); |
570d7624 | 5500 | Fput (Qfile_error, Qerror_message, |
d67b4f80 | 5501 | make_pure_c_string ("File error")); |
570d7624 JB |
5502 | |
5503 | Fput (Qfile_already_exists, Qerror_conditions, | |
d67b4f80 | 5504 | Fpurecopy (list3 (Qfile_already_exists, Qfile_error, Qerror))); |
570d7624 | 5505 | Fput (Qfile_already_exists, Qerror_message, |
d67b4f80 | 5506 | make_pure_c_string ("File already exists")); |
570d7624 | 5507 | |
c0b7b21c | 5508 | Fput (Qfile_date_error, Qerror_conditions, |
d67b4f80 | 5509 | Fpurecopy (list3 (Qfile_date_error, Qfile_error, Qerror))); |
c0b7b21c | 5510 | Fput (Qfile_date_error, Qerror_message, |
d67b4f80 | 5511 | make_pure_c_string ("Cannot set file date")); |
c0b7b21c | 5512 | |
29208e82 | 5513 | DEFVAR_LISP ("file-name-handler-alist", Vfile_name_handler_alist, |
8c1a1077 PJ |
5514 | doc: /* *Alist of elements (REGEXP . HANDLER) for file names handled specially. |
5515 | If a file name matches REGEXP, then all I/O on that file is done by calling | |
5516 | HANDLER. | |
5517 | ||
5518 | The first argument given to HANDLER is the name of the I/O primitive | |
5519 | to be handled; the remaining arguments are the arguments that were | |
5520 | passed to that primitive. For example, if you do | |
5521 | (file-exists-p FILENAME) | |
5522 | and FILENAME is handled by HANDLER, then HANDLER is called like this: | |
5523 | (funcall HANDLER 'file-exists-p FILENAME) | |
5524 | The function `find-file-name-handler' checks this list for a handler | |
5525 | for its argument. */); | |
09121adc RS |
5526 | Vfile_name_handler_alist = Qnil; |
5527 | ||
0414b394 | 5528 | DEFVAR_LISP ("set-auto-coding-function", |
29208e82 | 5529 | Vset_auto_coding_function, |
8c1a1077 PJ |
5530 | doc: /* If non-nil, a function to call to decide a coding system of file. |
5531 | Two arguments are passed to this function: the file name | |
5532 | and the length of a file contents following the point. | |
5533 | This function should return a coding system to decode the file contents. | |
5534 | It should check the file name against `auto-coding-alist'. | |
5535 | If no coding system is decided, it should check a coding system | |
5536 | specified in the heading lines with the format: | |
5537 | -*- ... coding: CODING-SYSTEM; ... -*- | |
5538 | or local variable spec of the tailing lines with `coding:' tag. */); | |
0414b394 | 5539 | Vset_auto_coding_function = Qnil; |
c9e82392 | 5540 | |
29208e82 | 5541 | DEFVAR_LISP ("after-insert-file-functions", Vafter_insert_file_functions, |
8c1a1077 | 5542 | doc: /* A list of functions to be called at the end of `insert-file-contents'. |
0cf9f5b5 RS |
5543 | Each is passed one argument, the number of characters inserted, |
5544 | with point at the start of the inserted text. Each function | |
5545 | should leave point the same, and return the new character count. | |
cf6d2357 RS |
5546 | If `insert-file-contents' is intercepted by a handler from |
5547 | `file-name-handler-alist', that handler is responsible for calling the | |
5548 | functions in `after-insert-file-functions' if appropriate. */); | |
d6a3cc15 RS |
5549 | Vafter_insert_file_functions = Qnil; |
5550 | ||
29208e82 | 5551 | DEFVAR_LISP ("write-region-annotate-functions", Vwrite_region_annotate_functions, |
8c1a1077 PJ |
5552 | doc: /* A list of functions to be called at the start of `write-region'. |
5553 | Each is passed two arguments, START and END as for `write-region'. | |
5554 | These are usually two numbers but not always; see the documentation | |
5555 | for `write-region'. The function should return a list of pairs | |
5556 | of the form (POSITION . STRING), consisting of strings to be effectively | |
5557 | inserted at the specified positions of the file being written (1 means to | |
5558 | insert before the first byte written). The POSITIONs must be sorted into | |
67fbc0cb CY |
5559 | increasing order. |
5560 | ||
5561 | If there are several annotation functions, the lists returned by these | |
5562 | functions are merged destructively. As each annotation function runs, | |
5563 | the variable `write-region-annotations-so-far' contains a list of all | |
5564 | annotations returned by previous annotation functions. | |
5565 | ||
5566 | An annotation function can return with a different buffer current. | |
5567 | Doing so removes the annotations returned by previous functions, and | |
5568 | resets START and END to `point-min' and `point-max' of the new buffer. | |
5569 | ||
5570 | After `write-region' completes, Emacs calls the function stored in | |
5571 | `write-region-post-annotation-function', once for each buffer that was | |
5572 | current when building the annotations (i.e., at least once), with that | |
5573 | buffer current. */); | |
d6a3cc15 | 5574 | Vwrite_region_annotate_functions = Qnil; |
cd3520a4 | 5575 | DEFSYM (Qwrite_region_annotate_functions, "write-region-annotate-functions"); |
d6a3cc15 | 5576 | |
67fbc0cb | 5577 | DEFVAR_LISP ("write-region-post-annotation-function", |
29208e82 | 5578 | Vwrite_region_post_annotation_function, |
67fbc0cb CY |
5579 | doc: /* Function to call after `write-region' completes. |
5580 | The function is called with no arguments. If one or more of the | |
5581 | annotation functions in `write-region-annotate-functions' changed the | |
5582 | current buffer, the function stored in this variable is called for | |
5583 | each of those additional buffers as well, in addition to the original | |
5584 | buffer. The relevant buffer is current during each function call. */); | |
5585 | Vwrite_region_post_annotation_function = Qnil; | |
5586 | staticpro (&Vwrite_region_annotation_buffers); | |
5587 | ||
6fc6f94b | 5588 | DEFVAR_LISP ("write-region-annotations-so-far", |
29208e82 | 5589 | Vwrite_region_annotations_so_far, |
8c1a1077 PJ |
5590 | doc: /* When an annotation function is called, this holds the previous annotations. |
5591 | These are the annotations made by other annotation functions | |
5592 | that were already called. See also `write-region-annotate-functions'. */); | |
6fc6f94b RS |
5593 | Vwrite_region_annotations_so_far = Qnil; |
5594 | ||
29208e82 | 5595 | DEFVAR_LISP ("inhibit-file-name-handlers", Vinhibit_file_name_handlers, |
8c1a1077 PJ |
5596 | doc: /* A list of file name handlers that temporarily should not be used. |
5597 | This applies only to the operation `inhibit-file-name-operation'. */); | |
82c2d839 RS |
5598 | Vinhibit_file_name_handlers = Qnil; |
5599 | ||
29208e82 | 5600 | DEFVAR_LISP ("inhibit-file-name-operation", Vinhibit_file_name_operation, |
8c1a1077 | 5601 | doc: /* The operation for which `inhibit-file-name-handlers' is applicable. */); |
a65970a0 RS |
5602 | Vinhibit_file_name_operation = Qnil; |
5603 | ||
29208e82 | 5604 | DEFVAR_LISP ("auto-save-list-file-name", Vauto_save_list_file_name, |
8c1a1077 PJ |
5605 | doc: /* File name in which we write a list of all auto save file names. |
5606 | This variable is initialized automatically from `auto-save-list-file-prefix' | |
5607 | shortly after Emacs reads your `.emacs' file, if you have not yet given it | |
5608 | a non-nil value. */); | |
e54d3b5d RS |
5609 | Vauto_save_list_file_name = Qnil; |
5610 | ||
29208e82 | 5611 | DEFVAR_LISP ("auto-save-visited-file-name", Vauto_save_visited_file_name, |
699b53bc CY |
5612 | doc: /* Non-nil says auto-save a buffer in the file it is visiting, when practical. |
5613 | Normally auto-save files are written under other names. */); | |
5614 | Vauto_save_visited_file_name = Qnil; | |
5615 | ||
29208e82 | 5616 | DEFVAR_LISP ("auto-save-include-big-deletions", Vauto_save_include_big_deletions, |
090101cf CY |
5617 | doc: /* If non-nil, auto-save even if a large part of the text is deleted. |
5618 | If nil, deleting a substantial portion of the text disables auto-save | |
5619 | in the buffer; this is the default behavior, because the auto-save | |
5620 | file is usually more useful if it contains the deleted text. */); | |
5621 | Vauto_save_include_big_deletions = Qnil; | |
5622 | ||
ccf61795 | 5623 | #ifdef HAVE_FSYNC |
29208e82 | 5624 | DEFVAR_BOOL ("write-region-inhibit-fsync", write_region_inhibit_fsync, |
e3f509dd RF |
5625 | doc: /* *Non-nil means don't call fsync in `write-region'. |
5626 | This variable affects calls to `write-region' as well as save commands. | |
5627 | A non-nil value may result in data loss! */); | |
ccf61795 RF |
5628 | write_region_inhibit_fsync = 0; |
5629 | #endif | |
5630 | ||
29208e82 | 5631 | DEFVAR_BOOL ("delete-by-moving-to-trash", delete_by_moving_to_trash, |
6cf29fe8 | 5632 | doc: /* Specifies whether to use the system's trash can. |
f1a5d776 CY |
5633 | When non-nil, certain file deletion commands use the function |
5634 | `move-file-to-trash' instead of deleting files outright. | |
5635 | This includes interactive calls to `delete-file' and | |
5636 | `delete-directory' and the Dired deletion commands. */); | |
6cf29fe8 | 5637 | delete_by_moving_to_trash = 0; |
d67b4f80 | 5638 | Qdelete_by_moving_to_trash = intern_c_string ("delete-by-moving-to-trash"); |
cd3520a4 JB |
5639 | |
5640 | DEFSYM (Qmove_file_to_trash, "move-file-to-trash"); | |
5641 | DEFSYM (Qcopy_directory, "copy-directory"); | |
5642 | DEFSYM (Qdelete_directory, "delete-directory"); | |
6cf29fe8 | 5643 | |
642ef245 | 5644 | defsubr (&Sfind_file_name_handler); |
570d7624 JB |
5645 | defsubr (&Sfile_name_directory); |
5646 | defsubr (&Sfile_name_nondirectory); | |
642ef245 | 5647 | defsubr (&Sunhandled_file_name_directory); |
570d7624 JB |
5648 | defsubr (&Sfile_name_as_directory); |
5649 | defsubr (&Sdirectory_file_name); | |
5650 | defsubr (&Smake_temp_name); | |
5651 | defsubr (&Sexpand_file_name); | |
5652 | defsubr (&Ssubstitute_in_file_name); | |
5653 | defsubr (&Scopy_file); | |
9bbe01fb | 5654 | defsubr (&Smake_directory_internal); |
9d8f3bd9 | 5655 | defsubr (&Sdelete_directory_internal); |
570d7624 JB |
5656 | defsubr (&Sdelete_file); |
5657 | defsubr (&Srename_file); | |
5658 | defsubr (&Sadd_name_to_file); | |
570d7624 | 5659 | defsubr (&Smake_symbolic_link); |
570d7624 JB |
5660 | defsubr (&Sfile_name_absolute_p); |
5661 | defsubr (&Sfile_exists_p); | |
5662 | defsubr (&Sfile_executable_p); | |
5663 | defsubr (&Sfile_readable_p); | |
5664 | defsubr (&Sfile_writable_p); | |
1f8653eb | 5665 | defsubr (&Saccess_file); |
570d7624 JB |
5666 | defsubr (&Sfile_symlink_p); |
5667 | defsubr (&Sfile_directory_p); | |
b72dea2a | 5668 | defsubr (&Sfile_accessible_directory_p); |
f793dc6c | 5669 | defsubr (&Sfile_regular_p); |
570d7624 JB |
5670 | defsubr (&Sfile_modes); |
5671 | defsubr (&Sset_file_modes); | |
819da85b | 5672 | defsubr (&Sset_file_times); |
574c05e2 KK |
5673 | defsubr (&Sfile_selinux_context); |
5674 | defsubr (&Sset_file_selinux_context); | |
c24e9a53 RS |
5675 | defsubr (&Sset_default_file_modes); |
5676 | defsubr (&Sdefault_file_modes); | |
570d7624 JB |
5677 | defsubr (&Sfile_newer_than_file_p); |
5678 | defsubr (&Sinsert_file_contents); | |
5679 | defsubr (&Swrite_region); | |
d6a3cc15 | 5680 | defsubr (&Scar_less_than_car); |
570d7624 JB |
5681 | defsubr (&Sverify_visited_file_modtime); |
5682 | defsubr (&Sclear_visited_file_modtime); | |
f5d5eccf | 5683 | defsubr (&Svisited_file_modtime); |
570d7624 JB |
5684 | defsubr (&Sset_visited_file_modtime); |
5685 | defsubr (&Sdo_auto_save); | |
5686 | defsubr (&Sset_buffer_auto_saved); | |
b60247d9 | 5687 | defsubr (&Sclear_buffer_auto_save_failure); |
570d7624 JB |
5688 | defsubr (&Srecent_auto_save_p); |
5689 | ||
88208bb8 | 5690 | defsubr (&Snext_read_file_uses_dialog_p); |
85ffea93 | 5691 | |
697c17a2 | 5692 | #ifdef HAVE_SYNC |
85ffea93 | 5693 | defsubr (&Sunix_sync); |
483a2e10 | 5694 | #endif |
570d7624 | 5695 | } |