Commit | Line | Data |
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570d7624 | 1 | /* File IO for GNU Emacs. |
e9bffc61 | 2 | |
24c51a09 | 3 | Copyright (C) 1985-1988, 1993-2012 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" |
db327c7e | 43 | #include "character.h" |
e5560ff7 | 44 | #include "buffer.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 | 64 | /* On Windows, drive letters must be alphabetic - on DOS, the Netware |
a5bb9bd3 | 65 | redirector allows the six letters between 'Z' and 'a' as well. */ |
199607e4 RS |
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 | 72 | /* Need to lower-case the drive letter, or else expanded |
53964682 | 73 | filenames will sometimes compare unequal, because |
f54b565c | 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" |
d35af63c | 79 | #include <stat-time.h> |
570d7624 JB |
80 | |
81 | #ifdef HPUX | |
82 | #include <netio.h> | |
47e7b9e5 | 83 | #endif |
570d7624 | 84 | |
9c856db9 | 85 | #include "commands.h" |
9c856db9 | 86 | |
71873e2b | 87 | /* Nonzero during writing of auto-save files. */ |
5045092b | 88 | static int auto_saving; |
570d7624 | 89 | |
71873e2b | 90 | /* Nonzero umask during creation of auto-save directories. */ |
09450bae PE |
91 | static int auto_saving_dir_umask; |
92 | ||
570d7624 | 93 | /* Set by auto_save_1 to mode of original file so Fwrite_region will create |
71873e2b | 94 | a new file with the same mode as the original. */ |
5045092b | 95 | static int auto_save_mode_bits; |
570d7624 | 96 | |
71873e2b | 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 | |
71873e2b | 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 | |
d311d28c | 147 | static int a_write (int, Lisp_Object, ptrdiff_t, ptrdiff_t, |
f57e2426 | 148 | Lisp_Object *, struct coding_system *); |
d311d28c | 149 | static int e_write (int, Lisp_Object, ptrdiff_t, ptrdiff_t, |
8a2cbd72 | 150 | struct coding_system *); |
ce51c54c | 151 | |
ec7adf26 | 152 | \f |
5d01d666 | 153 | void |
971de7fb | 154 | report_file_error (const char *string, Lisp_Object data) |
570d7624 JB |
155 | { |
156 | Lisp_Object errstring; | |
505ab9bc | 157 | int errorno = errno; |
d7259fdb | 158 | char *str; |
570d7624 | 159 | |
ca9c0567 | 160 | synchronize_system_messages_locale (); |
d7259fdb | 161 | str = strerror (errorno); |
d7ea76b4 | 162 | errstring = code_convert_string_norecord (build_unibyte_string (str), |
68c45bf0 PE |
163 | Vlocale_coding_system, 0); |
164 | ||
570d7624 | 165 | while (1) |
505ab9bc RS |
166 | switch (errorno) |
167 | { | |
168 | case EEXIST: | |
24b1ddad | 169 | xsignal (Qfile_already_exists, Fcons (errstring, data)); |
505ab9bc RS |
170 | break; |
171 | default: | |
172 | /* System error messages are capitalized. Downcase the initial | |
39824137 EZ |
173 | unless it is followed by a slash. (The slash case caters to |
174 | error messages that begin with "I/O" or, in German, "E/A".) */ | |
d5443ffd KH |
175 | if (STRING_MULTIBYTE (errstring) |
176 | && ! EQ (Faref (errstring, make_number (1)), make_number ('/'))) | |
6c0969ca KH |
177 | { |
178 | int c; | |
179 | ||
51b59d79 | 180 | str = SSDATA (errstring); |
5976c3fe | 181 | c = STRING_CHAR ((unsigned char *) str); |
5da9919f | 182 | Faset (errstring, make_number (0), make_number (downcase (c))); |
6c0969ca | 183 | } |
505ab9bc | 184 | |
24b1ddad | 185 | xsignal (Qfile_error, |
505ab9bc RS |
186 | Fcons (build_string (string), Fcons (errstring, data))); |
187 | } | |
570d7624 | 188 | } |
b5148e85 | 189 | |
b27a1703 | 190 | Lisp_Object |
971de7fb | 191 | close_file_unwind (Lisp_Object fd) |
b5148e85 | 192 | { |
68c45bf0 | 193 | emacs_close (XFASTINT (fd)); |
b27a1703 | 194 | return Qnil; |
b5148e85 | 195 | } |
a1d2b64a RS |
196 | |
197 | /* Restore point, having saved it as a marker. */ | |
198 | ||
5dcde606 | 199 | Lisp_Object |
971de7fb | 200 | restore_point_unwind (Lisp_Object location) |
a1d2b64a | 201 | { |
ec7adf26 | 202 | Fgoto_char (location); |
a1d2b64a | 203 | Fset_marker (location, Qnil, Qnil); |
b27a1703 | 204 | return Qnil; |
a1d2b64a | 205 | } |
59c94f03 | 206 | |
570d7624 | 207 | \f |
955cbe7b PE |
208 | static Lisp_Object Qexpand_file_name; |
209 | static Lisp_Object Qsubstitute_in_file_name; | |
210 | static Lisp_Object Qdirectory_file_name; | |
211 | static Lisp_Object Qfile_name_directory; | |
212 | static Lisp_Object Qfile_name_nondirectory; | |
213 | static Lisp_Object Qunhandled_file_name_directory; | |
214 | static Lisp_Object Qfile_name_as_directory; | |
215 | static Lisp_Object Qcopy_file; | |
216 | static Lisp_Object Qmake_directory_internal; | |
217 | static Lisp_Object Qmake_directory; | |
218 | static Lisp_Object Qdelete_directory_internal; | |
32f4334d | 219 | Lisp_Object Qdelete_file; |
955cbe7b PE |
220 | static Lisp_Object Qrename_file; |
221 | static Lisp_Object Qadd_name_to_file; | |
222 | static Lisp_Object Qmake_symbolic_link; | |
32f4334d | 223 | Lisp_Object Qfile_exists_p; |
955cbe7b PE |
224 | static Lisp_Object Qfile_executable_p; |
225 | static Lisp_Object Qfile_readable_p; | |
226 | static Lisp_Object Qfile_writable_p; | |
227 | static Lisp_Object Qfile_symlink_p; | |
228 | static Lisp_Object Qaccess_file; | |
32f4334d | 229 | Lisp_Object Qfile_directory_p; |
955cbe7b PE |
230 | static Lisp_Object Qfile_regular_p; |
231 | static Lisp_Object Qfile_accessible_directory_p; | |
232 | static Lisp_Object Qfile_modes; | |
233 | static Lisp_Object Qset_file_modes; | |
234 | static Lisp_Object Qset_file_times; | |
235 | static Lisp_Object Qfile_selinux_context; | |
236 | static Lisp_Object Qset_file_selinux_context; | |
237 | static Lisp_Object Qfile_newer_than_file_p; | |
32f4334d RS |
238 | Lisp_Object Qinsert_file_contents; |
239 | Lisp_Object Qwrite_region; | |
955cbe7b PE |
240 | static Lisp_Object Qverify_visited_file_modtime; |
241 | static Lisp_Object Qset_visited_file_modtime; | |
32f4334d | 242 | |
a7ca3326 | 243 | DEFUN ("find-file-name-handler", Ffind_file_name_handler, |
16a97296 | 244 | Sfind_file_name_handler, 2, 2, 0, |
8c1a1077 PJ |
245 | doc: /* Return FILENAME's handler function for OPERATION, if it has one. |
246 | Otherwise, return nil. | |
247 | A file name is handled if one of the regular expressions in | |
248 | `file-name-handler-alist' matches it. | |
249 | ||
250 | If OPERATION equals `inhibit-file-name-operation', then we ignore | |
251 | any handlers that are members of `inhibit-file-name-handlers', | |
252 | but we still do run any other handlers. This lets handlers | |
253 | use the standard functions without calling themselves recursively. */) | |
5842a27b | 254 | (Lisp_Object filename, Lisp_Object operation) |
32f4334d | 255 | { |
642ef245 | 256 | /* This function must not munge the match data. */ |
204ee271 | 257 | Lisp_Object chain, inhibited_handlers, result; |
d311d28c | 258 | ptrdiff_t pos = -1; |
642ef245 | 259 | |
204ee271 | 260 | result = Qnil; |
b7826503 | 261 | CHECK_STRING (filename); |
e4432095 | 262 | |
a65970a0 RS |
263 | if (EQ (operation, Vinhibit_file_name_operation)) |
264 | inhibited_handlers = Vinhibit_file_name_handlers; | |
265 | else | |
266 | inhibited_handlers = Qnil; | |
82c2d839 | 267 | |
93c30b5f | 268 | for (chain = Vfile_name_handler_alist; CONSP (chain); |
03699b14 | 269 | chain = XCDR (chain)) |
32f4334d RS |
270 | { |
271 | Lisp_Object elt; | |
03699b14 | 272 | elt = XCAR (chain); |
93c30b5f | 273 | if (CONSP (elt)) |
32f4334d | 274 | { |
f6c9b683 | 275 | Lisp_Object string = XCAR (elt); |
d311d28c | 276 | ptrdiff_t match_pos; |
f6c9b683 | 277 | Lisp_Object handler = XCDR (elt); |
68780e2a RS |
278 | Lisp_Object operations = Qnil; |
279 | ||
280 | if (SYMBOLP (handler)) | |
281 | operations = Fget (handler, Qoperations); | |
f6c9b683 | 282 | |
8d2ced53 | 283 | if (STRINGP (string) |
f6c9b683 RS |
284 | && (match_pos = fast_string_match (string, filename)) > pos |
285 | && (NILP (operations) || ! NILP (Fmemq (operation, operations)))) | |
a65970a0 | 286 | { |
f6c9b683 | 287 | Lisp_Object tem; |
a65970a0 | 288 | |
03699b14 | 289 | handler = XCDR (elt); |
a65970a0 RS |
290 | tem = Fmemq (handler, inhibited_handlers); |
291 | if (NILP (tem)) | |
8d2ced53 SM |
292 | { |
293 | result = handler; | |
294 | pos = match_pos; | |
295 | } | |
a65970a0 | 296 | } |
32f4334d | 297 | } |
642ef245 JB |
298 | |
299 | QUIT; | |
32f4334d | 300 | } |
8d2ced53 | 301 | return result; |
32f4334d RS |
302 | } |
303 | \f | |
a7ca3326 | 304 | DEFUN ("file-name-directory", Ffile_name_directory, Sfile_name_directory, |
8c1a1077 PJ |
305 | 1, 1, 0, |
306 | doc: /* Return the directory component in file name FILENAME. | |
307 | Return nil if FILENAME does not include a directory. | |
78379264 | 308 | Otherwise return a directory name. |
7c2fb837 | 309 | Given a Unix syntax file name, returns a string ending in slash. */) |
5842a27b | 310 | (Lisp_Object filename) |
570d7624 | 311 | { |
100c44b7 | 312 | #ifndef DOS_NT |
5976c3fe | 313 | register const char *beg; |
100c44b7 | 314 | #else |
5976c3fe | 315 | register char *beg; |
100c44b7 | 316 | #endif |
5976c3fe | 317 | register const char *p; |
0bf2eed2 | 318 | Lisp_Object handler; |
570d7624 | 319 | |
b7826503 | 320 | CHECK_STRING (filename); |
570d7624 | 321 | |
0bf2eed2 RS |
322 | /* If the file name has special constructs in it, |
323 | call the corresponding file handler. */ | |
3b7f6e60 | 324 | handler = Ffind_file_name_handler (filename, Qfile_name_directory); |
0bf2eed2 | 325 | if (!NILP (handler)) |
2375c96a CY |
326 | { |
327 | Lisp_Object handled_name = call2 (handler, Qfile_name_directory, | |
328 | filename); | |
329 | return STRINGP (handled_name) ? handled_name : Qnil; | |
330 | } | |
0bf2eed2 | 331 | |
199607e4 | 332 | #ifdef DOS_NT |
38182d90 | 333 | beg = alloca (SBYTES (filename) + 1); |
5976c3fe | 334 | memcpy (beg, SSDATA (filename), SBYTES (filename) + 1); |
0f3f018c | 335 | #else |
5976c3fe | 336 | beg = SSDATA (filename); |
199607e4 | 337 | #endif |
d5db4077 | 338 | p = beg + SBYTES (filename); |
570d7624 | 339 | |
199607e4 | 340 | while (p != beg && !IS_DIRECTORY_SEP (p[-1]) |
199607e4 | 341 | #ifdef DOS_NT |
e1dbe924 | 342 | /* only recognize drive specifier at the beginning */ |
ba14e174 RS |
343 | && !(p[-1] == ':' |
344 | /* handle the "/:d:foo" and "/:foo" cases correctly */ | |
345 | && ((p == beg + 2 && !IS_DIRECTORY_SEP (*beg)) | |
346 | || (p == beg + 4 && IS_DIRECTORY_SEP (*beg)))) | |
199607e4 | 347 | #endif |
570d7624 JB |
348 | ) p--; |
349 | ||
350 | if (p == beg) | |
351 | return Qnil; | |
5e570b75 | 352 | #ifdef DOS_NT |
4c3c22f3 | 353 | /* Expansion of "c:" to drive and default directory. */ |
ba14e174 | 354 | if (p[-1] == ':') |
4c3c22f3 | 355 | { |
4c3c22f3 | 356 | /* MAXPATHLEN+1 is guaranteed to be enough space for getdefdir. */ |
5976c3fe PE |
357 | char *res = alloca (MAXPATHLEN + 1); |
358 | char *r = res; | |
ba14e174 RS |
359 | |
360 | if (p == beg + 4 && IS_DIRECTORY_SEP (*beg) && beg[1] == ':') | |
361 | { | |
e99a530f | 362 | memcpy (res, beg, 2); |
ba14e174 RS |
363 | beg += 2; |
364 | r += 2; | |
365 | } | |
366 | ||
5976c3fe | 367 | if (getdefdir (toupper ((unsigned char) *beg) - 'A' + 1, r)) |
4c3c22f3 | 368 | { |
199607e4 | 369 | if (!IS_DIRECTORY_SEP (res[strlen (res) - 1])) |
4c3c22f3 RS |
370 | strcat (res, "/"); |
371 | beg = res; | |
372 | p = beg + strlen (beg); | |
373 | } | |
374 | } | |
087fc47a | 375 | dostounix_filename (beg); |
5e570b75 | 376 | #endif /* DOS_NT */ |
60d67b83 | 377 | |
d7231f93 | 378 | return make_specified_string (beg, -1, p - beg, STRING_MULTIBYTE (filename)); |
570d7624 JB |
379 | } |
380 | ||
a7ca3326 | 381 | DEFUN ("file-name-nondirectory", Ffile_name_nondirectory, |
60d67b83 | 382 | Sfile_name_nondirectory, 1, 1, 0, |
8c1a1077 PJ |
383 | doc: /* Return file name FILENAME sans its directory. |
384 | For example, in a Unix-syntax file name, | |
385 | this is everything after the last slash, | |
386 | or the entire name if it contains no slash. */) | |
5842a27b | 387 | (Lisp_Object filename) |
570d7624 | 388 | { |
5976c3fe | 389 | register const char *beg, *p, *end; |
0bf2eed2 | 390 | Lisp_Object handler; |
570d7624 | 391 | |
b7826503 | 392 | CHECK_STRING (filename); |
570d7624 | 393 | |
0bf2eed2 RS |
394 | /* If the file name has special constructs in it, |
395 | call the corresponding file handler. */ | |
3b7f6e60 | 396 | handler = Ffind_file_name_handler (filename, Qfile_name_nondirectory); |
0bf2eed2 | 397 | if (!NILP (handler)) |
2375c96a CY |
398 | { |
399 | Lisp_Object handled_name = call2 (handler, Qfile_name_nondirectory, | |
400 | filename); | |
401 | if (STRINGP (handled_name)) | |
402 | return handled_name; | |
403 | error ("Invalid handler in `file-name-handler-alist'"); | |
404 | } | |
0bf2eed2 | 405 | |
5976c3fe | 406 | beg = SSDATA (filename); |
d5db4077 | 407 | end = p = beg + SBYTES (filename); |
570d7624 | 408 | |
199607e4 | 409 | while (p != beg && !IS_DIRECTORY_SEP (p[-1]) |
199607e4 | 410 | #ifdef DOS_NT |
e1dbe924 | 411 | /* only recognize drive specifier at beginning */ |
ba14e174 RS |
412 | && !(p[-1] == ':' |
413 | /* handle the "/:d:foo" case correctly */ | |
414 | && (p == beg + 2 || (p == beg + 4 && IS_DIRECTORY_SEP (*beg)))) | |
199607e4 | 415 | #endif |
60d67b83 RS |
416 | ) |
417 | p--; | |
570d7624 | 418 | |
d7231f93 | 419 | return make_specified_string (p, -1, end - p, STRING_MULTIBYTE (filename)); |
570d7624 | 420 | } |
642ef245 | 421 | |
a7ca3326 | 422 | DEFUN ("unhandled-file-name-directory", Funhandled_file_name_directory, |
60d67b83 | 423 | Sunhandled_file_name_directory, 1, 1, 0, |
8c1a1077 PJ |
424 | doc: /* Return a directly usable directory name somehow associated with FILENAME. |
425 | A `directly usable' directory name is one that may be used without the | |
426 | intervention of any file handler. | |
427 | If FILENAME is a directly usable file itself, return | |
428 | \(file-name-directory FILENAME). | |
ca319910 SM |
429 | If FILENAME refers to a file which is not accessible from a local process, |
430 | then this should return nil. | |
8c1a1077 PJ |
431 | The `call-process' and `start-process' functions use this function to |
432 | get a current directory to run processes in. */) | |
5842a27b | 433 | (Lisp_Object filename) |
642ef245 JB |
434 | { |
435 | Lisp_Object handler; | |
436 | ||
437 | /* If the file name has special constructs in it, | |
438 | call the corresponding file handler. */ | |
49307295 | 439 | handler = Ffind_file_name_handler (filename, Qunhandled_file_name_directory); |
642ef245 | 440 | if (!NILP (handler)) |
2375c96a CY |
441 | { |
442 | Lisp_Object handled_name = call2 (handler, Qunhandled_file_name_directory, | |
443 | filename); | |
444 | return STRINGP (handled_name) ? handled_name : Qnil; | |
445 | } | |
642ef245 JB |
446 | |
447 | return Ffile_name_directory (filename); | |
448 | } | |
449 | ||
c293e30c DA |
450 | /* Convert from file name SRC of length SRCLEN to directory name |
451 | in DST. On UNIX, just make sure there is a terminating /. | |
452 | Return the length of DST. */ | |
570d7624 | 453 | |
c293e30c DA |
454 | static ptrdiff_t |
455 | file_name_as_directory (char *dst, const char *src, ptrdiff_t srclen) | |
456 | { | |
457 | if (srclen == 0) | |
8aa3a244 | 458 | { |
c293e30c DA |
459 | dst[0] = '.'; |
460 | dst[1] = '/'; | |
461 | dst[2] = '\0'; | |
462 | return 2; | |
8aa3a244 RS |
463 | } |
464 | ||
c293e30c | 465 | strcpy (dst, src); |
93f4cf88 | 466 | |
c293e30c | 467 | if (!IS_DIRECTORY_SEP (dst[srclen - 1])) |
5e570b75 | 468 | { |
c293e30c DA |
469 | dst[srclen] = DIRECTORY_SEP; |
470 | dst[srclen + 1] = '\0'; | |
471 | srclen++; | |
5e570b75 | 472 | } |
199607e4 | 473 | #ifdef DOS_NT |
c293e30c | 474 | dostounix_filename (dst); |
199607e4 | 475 | #endif |
c293e30c | 476 | return srclen; |
570d7624 JB |
477 | } |
478 | ||
a7ca3326 | 479 | DEFUN ("file-name-as-directory", Ffile_name_as_directory, |
570d7624 | 480 | Sfile_name_as_directory, 1, 1, 0, |
0dac4f85 | 481 | doc: /* Return a string representing the file name FILE interpreted as a directory. |
8c1a1077 PJ |
482 | This operation exists because a directory is also a file, but its name as |
483 | a directory is different from its name as a file. | |
484 | The result can be used as the value of `default-directory' | |
485 | or passed as second argument to `expand-file-name'. | |
7c2fb837 | 486 | For a Unix-syntax file name, just appends a slash. */) |
5842a27b | 487 | (Lisp_Object file) |
570d7624 JB |
488 | { |
489 | char *buf; | |
c293e30c | 490 | ptrdiff_t length; |
0bf2eed2 | 491 | Lisp_Object handler; |
570d7624 | 492 | |
b7826503 | 493 | CHECK_STRING (file); |
265a9e55 | 494 | if (NILP (file)) |
570d7624 | 495 | return Qnil; |
0bf2eed2 RS |
496 | |
497 | /* If the file name has special constructs in it, | |
498 | call the corresponding file handler. */ | |
49307295 | 499 | handler = Ffind_file_name_handler (file, Qfile_name_as_directory); |
0bf2eed2 | 500 | if (!NILP (handler)) |
2375c96a CY |
501 | { |
502 | Lisp_Object handled_name = call2 (handler, Qfile_name_as_directory, | |
503 | file); | |
504 | if (STRINGP (handled_name)) | |
505 | return handled_name; | |
506 | error ("Invalid handler in `file-name-handler-alist'"); | |
507 | } | |
0bf2eed2 | 508 | |
38182d90 | 509 | buf = alloca (SBYTES (file) + 10); |
c293e30c DA |
510 | length = file_name_as_directory (buf, SSDATA (file), SBYTES (file)); |
511 | return make_specified_string (buf, -1, length, STRING_MULTIBYTE (file)); | |
570d7624 JB |
512 | } |
513 | \f | |
c293e30c DA |
514 | /* Convert from directory name SRC of length SRCLEN to |
515 | file name in DST. On UNIX, just make sure there isn't | |
516 | a terminating /. Return the length of DST. */ | |
570d7624 | 517 | |
c293e30c DA |
518 | static ptrdiff_t |
519 | directory_file_name (char *dst, char *src, ptrdiff_t srclen) | |
570d7624 | 520 | { |
570d7624 JB |
521 | /* Process as Unix format: just remove any final slash. |
522 | But leave "/" unchanged; do not change it to "". */ | |
523 | strcpy (dst, src); | |
c293e30c DA |
524 | if (srclen > 1 |
525 | && IS_DIRECTORY_SEP (dst[srclen - 1]) | |
4592782e | 526 | #ifdef DOS_NT |
c293e30c | 527 | && !IS_ANY_SEP (dst[srclen - 2]) |
4592782e RS |
528 | #endif |
529 | ) | |
c293e30c DA |
530 | { |
531 | dst[srclen - 1] = 0; | |
532 | srclen--; | |
533 | } | |
199607e4 | 534 | #ifdef DOS_NT |
087fc47a | 535 | dostounix_filename (dst); |
125feee8 | 536 | #endif |
c293e30c | 537 | return srclen; |
570d7624 JB |
538 | } |
539 | ||
a7ca3326 | 540 | DEFUN ("directory-file-name", Fdirectory_file_name, Sdirectory_file_name, |
8c1a1077 PJ |
541 | 1, 1, 0, |
542 | doc: /* Returns the file name of the directory named DIRECTORY. | |
543 | This is the name of the file that holds the data for the directory DIRECTORY. | |
544 | This operation exists because a directory is also a file, but its name as | |
545 | a directory is different from its name as a file. | |
7c2fb837 | 546 | In Unix-syntax, this function just removes the final slash. */) |
5842a27b | 547 | (Lisp_Object directory) |
570d7624 JB |
548 | { |
549 | char *buf; | |
c293e30c | 550 | ptrdiff_t length; |
0bf2eed2 | 551 | Lisp_Object handler; |
570d7624 | 552 | |
b7826503 | 553 | CHECK_STRING (directory); |
570d7624 | 554 | |
265a9e55 | 555 | if (NILP (directory)) |
570d7624 | 556 | return Qnil; |
0bf2eed2 RS |
557 | |
558 | /* If the file name has special constructs in it, | |
559 | call the corresponding file handler. */ | |
49307295 | 560 | handler = Ffind_file_name_handler (directory, Qdirectory_file_name); |
0bf2eed2 | 561 | if (!NILP (handler)) |
2375c96a CY |
562 | { |
563 | Lisp_Object handled_name = call2 (handler, Qdirectory_file_name, | |
564 | directory); | |
565 | if (STRINGP (handled_name)) | |
566 | return handled_name; | |
567 | error ("Invalid handler in `file-name-handler-alist'"); | |
568 | } | |
0bf2eed2 | 569 | |
38182d90 | 570 | buf = alloca (SBYTES (directory) + 20); |
c293e30c DA |
571 | length = directory_file_name (buf, SSDATA (directory), SBYTES (directory)); |
572 | return make_specified_string (buf, -1, length, STRING_MULTIBYTE (directory)); | |
570d7624 JB |
573 | } |
574 | ||
91433552 | 575 | static const char make_temp_name_tbl[64] = |
3ce839e4 RS |
576 | { |
577 | 'A','B','C','D','E','F','G','H', | |
578 | 'I','J','K','L','M','N','O','P', | |
579 | 'Q','R','S','T','U','V','W','X', | |
580 | 'Y','Z','a','b','c','d','e','f', | |
581 | 'g','h','i','j','k','l','m','n', | |
582 | 'o','p','q','r','s','t','u','v', | |
583 | 'w','x','y','z','0','1','2','3', | |
584 | '4','5','6','7','8','9','-','_' | |
585 | }; | |
cb613bb8 | 586 | |
3ce839e4 RS |
587 | static unsigned make_temp_name_count, make_temp_name_count_initialized_p; |
588 | ||
cb613bb8 | 589 | /* Value is a temporary file name starting with PREFIX, a string. |
efdc16c9 | 590 | |
cb613bb8 GM |
591 | The Emacs process number forms part of the result, so there is |
592 | no danger of generating a name being used by another process. | |
593 | In addition, this function makes an attempt to choose a name | |
594 | which has no existing file. To make this work, PREFIX should be | |
595 | an absolute file name. | |
efdc16c9 | 596 | |
cb613bb8 GM |
597 | BASE64_P non-zero means add the pid as 3 characters in base64 |
598 | encoding. In this case, 6 characters will be added to PREFIX to | |
599 | form the file name. Otherwise, if Emacs is running on a system | |
600 | with long file names, add the pid as a decimal number. | |
601 | ||
602 | This function signals an error if no unique file name could be | |
603 | generated. */ | |
604 | ||
605 | Lisp_Object | |
971de7fb | 606 | make_temp_name (Lisp_Object prefix, int base64_p) |
570d7624 JB |
607 | { |
608 | Lisp_Object val; | |
0cedd530 | 609 | int len, clen; |
a81d11a3 | 610 | printmax_t pid; |
5976c3fe | 611 | char *p, *data; |
a81d11a3 | 612 | char pidbuf[INT_BUFSIZE_BOUND (printmax_t)]; |
3ce839e4 | 613 | int pidlen; |
efdc16c9 | 614 | |
b7826503 | 615 | CHECK_STRING (prefix); |
3ce839e4 RS |
616 | |
617 | /* VAL is created by adding 6 characters to PREFIX. The first | |
618 | three are the PID of this process, in base 64, and the second | |
619 | three are incremented if the file already exists. This ensures | |
620 | 262144 unique file names per PID per PREFIX. */ | |
621 | ||
93f4cf88 | 622 | pid = getpid (); |
3ce839e4 | 623 | |
cb613bb8 GM |
624 | if (base64_p) |
625 | { | |
626 | pidbuf[0] = make_temp_name_tbl[pid & 63], pid >>= 6; | |
627 | pidbuf[1] = make_temp_name_tbl[pid & 63], pid >>= 6; | |
628 | pidbuf[2] = make_temp_name_tbl[pid & 63], pid >>= 6; | |
629 | pidlen = 3; | |
630 | } | |
631 | else | |
632 | { | |
3ce839e4 | 633 | #ifdef HAVE_LONG_FILE_NAMES |
a81d11a3 | 634 | pidlen = sprintf (pidbuf, "%"pMd, pid); |
3a3bfb18 | 635 | #else |
cb613bb8 GM |
636 | pidbuf[0] = make_temp_name_tbl[pid & 63], pid >>= 6; |
637 | pidbuf[1] = make_temp_name_tbl[pid & 63], pid >>= 6; | |
638 | pidbuf[2] = make_temp_name_tbl[pid & 63], pid >>= 6; | |
639 | pidlen = 3; | |
3ce839e4 | 640 | #endif |
cb613bb8 | 641 | } |
efdc16c9 | 642 | |
0cedd530 SM |
643 | len = SBYTES (prefix); clen = SCHARS (prefix); |
644 | val = make_uninit_multibyte_string (clen + 3 + pidlen, len + 3 + pidlen); | |
645 | if (!STRING_MULTIBYTE (prefix)) | |
646 | STRING_SET_UNIBYTE (val); | |
5976c3fe PE |
647 | data = SSDATA (val); |
648 | memcpy (data, SSDATA (prefix), len); | |
3ce839e4 RS |
649 | p = data + len; |
650 | ||
72af86bd | 651 | memcpy (p, pidbuf, pidlen); |
3ce839e4 RS |
652 | p += pidlen; |
653 | ||
654 | /* Here we try to minimize useless stat'ing when this function is | |
655 | invoked many times successively with the same PREFIX. We achieve | |
656 | this by initializing count to a random value, and incrementing it | |
f6a492a9 RS |
657 | afterwards. |
658 | ||
659 | We don't want make-temp-name to be called while dumping, | |
660 | because then make_temp_name_count_initialized_p would get set | |
661 | and then make_temp_name_count would not be set when Emacs starts. */ | |
662 | ||
3ce839e4 RS |
663 | if (!make_temp_name_count_initialized_p) |
664 | { | |
327eeec8 | 665 | make_temp_name_count = time (NULL); |
3ce839e4 RS |
666 | make_temp_name_count_initialized_p = 1; |
667 | } | |
668 | ||
669 | while (1) | |
670 | { | |
671 | struct stat ignored; | |
8a7777fc | 672 | unsigned num = make_temp_name_count; |
3ce839e4 RS |
673 | |
674 | p[0] = make_temp_name_tbl[num & 63], num >>= 6; | |
675 | p[1] = make_temp_name_tbl[num & 63], num >>= 6; | |
676 | p[2] = make_temp_name_tbl[num & 63], num >>= 6; | |
677 | ||
8a7777fc RS |
678 | /* Poor man's congruential RN generator. Replace with |
679 | ++make_temp_name_count for debugging. */ | |
680 | make_temp_name_count += 25229; | |
681 | make_temp_name_count %= 225307; | |
682 | ||
3ce839e4 RS |
683 | if (stat (data, &ignored) < 0) |
684 | { | |
685 | /* We want to return only if errno is ENOENT. */ | |
686 | if (errno == ENOENT) | |
687 | return val; | |
688 | else | |
689 | /* The error here is dubious, but there is little else we | |
690 | can do. The alternatives are to return nil, which is | |
691 | as bad as (and in many cases worse than) throwing the | |
692 | error, or to ignore the error, which will likely result | |
8a7777fc | 693 | in looping through 225307 stat's, which is not only |
410ed5c3 PE |
694 | dog-slow, but also useless since eventually nil would |
695 | have to be returned anyway. */ | |
9869bb0b | 696 | report_file_error ("Cannot create temporary name for prefix", |
3ce839e4 RS |
697 | Fcons (prefix, Qnil)); |
698 | /* not reached */ | |
699 | } | |
700 | } | |
570d7624 | 701 | } |
3ce839e4 | 702 | |
cb613bb8 GM |
703 | |
704 | DEFUN ("make-temp-name", Fmake_temp_name, Smake_temp_name, 1, 1, 0, | |
8c1a1077 PJ |
705 | doc: /* Generate temporary file name (string) starting with PREFIX (a string). |
706 | The Emacs process number forms part of the result, | |
707 | so there is no danger of generating a name being used by another process. | |
708 | ||
709 | In addition, this function makes an attempt to choose a name | |
710 | which has no existing file. To make this work, | |
711 | PREFIX should be an absolute file name. | |
712 | ||
713 | There is a race condition between calling `make-temp-name' and creating the | |
714 | file which opens all kinds of security holes. For that reason, you should | |
f9e6f049 RS |
715 | probably use `make-temp-file' instead, except in three circumstances: |
716 | ||
717 | * If you are creating the file in the user's home directory. | |
718 | * If you are creating a directory rather than an ordinary file. | |
719 | * If you are taking special precautions as `make-temp-file' does. */) | |
5842a27b | 720 | (Lisp_Object prefix) |
cb613bb8 GM |
721 | { |
722 | return make_temp_name (prefix, 0); | |
723 | } | |
724 | ||
725 | ||
570d7624 | 726 | \f |
a7ca3326 | 727 | DEFUN ("expand-file-name", Fexpand_file_name, Sexpand_file_name, 1, 2, 0, |
8c1a1077 PJ |
728 | doc: /* Convert filename NAME to absolute, and canonicalize it. |
729 | Second arg DEFAULT-DIRECTORY is directory to start with if NAME is relative | |
78379264 | 730 | \(does not start with slash or tilde); if DEFAULT-DIRECTORY is nil or missing, |
a4e03fe5 | 731 | the current buffer's value of `default-directory' is used. |
1b2a627f EZ |
732 | NAME should be a string that is a valid file name for the underlying |
733 | filesystem. | |
8c1a1077 PJ |
734 | File name components that are `.' are removed, and |
735 | so are file name components followed by `..', along with the `..' itself; | |
736 | note that these simplifications are done without checking the resulting | |
737 | file names in the file system. | |
15579471 EZ |
738 | Multiple consecutive slashes are collapsed into a single slash, |
739 | except at the beginning of the file name when they are significant (e.g., | |
740 | UNC file names on MS-Windows.) | |
8c1a1077 PJ |
741 | An initial `~/' expands to your home directory. |
742 | An initial `~USER/' expands to USER's home directory. | |
07114296 CY |
743 | See also the function `substitute-in-file-name'. |
744 | ||
745 | For technical reasons, this function can return correct but | |
746 | non-intuitive results for the root directory; for instance, | |
747 | \(expand-file-name ".." "/") returns "/..". For this reason, use | |
15579471 | 748 | \(directory-file-name (file-name-directory dirname)) to traverse a |
07114296 | 749 | filesystem tree, not (expand-file-name ".." dirname). */) |
5842a27b | 750 | (Lisp_Object name, Lisp_Object default_directory) |
570d7624 | 751 | { |
5b5a2ea1 SM |
752 | /* These point to SDATA and need to be careful with string-relocation |
753 | during GC (via DECODE_FILE). */ | |
2893f146 PE |
754 | char *nm; |
755 | const char *newdir; | |
5b5a2ea1 | 756 | /* This should only point to alloca'd data. */ |
5976c3fe | 757 | char *target; |
199607e4 | 758 | |
93f4cf88 | 759 | ptrdiff_t tlen; |
570d7624 | 760 | struct passwd *pw; |
5e570b75 | 761 | #ifdef DOS_NT |
199607e4 | 762 | int drive = 0; |
9a1dc3be | 763 | int collapse_newdir = 1; |
f0f95d31 | 764 | int is_escaped = 0; |
5e570b75 | 765 | #endif /* DOS_NT */ |
93f4cf88 | 766 | ptrdiff_t length; |
2375c96a | 767 | Lisp_Object handler, result, handled_name; |
2b046a72 | 768 | int multibyte; |
9c06a1f3 | 769 | Lisp_Object hdir; |
199607e4 | 770 | |
b7826503 | 771 | CHECK_STRING (name); |
570d7624 | 772 | |
0bf2eed2 RS |
773 | /* If the file name has special constructs in it, |
774 | call the corresponding file handler. */ | |
49307295 | 775 | handler = Ffind_file_name_handler (name, Qexpand_file_name); |
0bf2eed2 | 776 | if (!NILP (handler)) |
2375c96a CY |
777 | { |
778 | handled_name = call3 (handler, Qexpand_file_name, | |
779 | name, default_directory); | |
780 | if (STRINGP (handled_name)) | |
781 | return handled_name; | |
782 | error ("Invalid handler in `file-name-handler-alist'"); | |
783 | } | |
784 | ||
58fc9587 | 785 | |
3b7f6e60 EN |
786 | /* Use the buffer's default-directory if DEFAULT_DIRECTORY is omitted. */ |
787 | if (NILP (default_directory)) | |
4b4deea2 | 788 | default_directory = BVAR (current_buffer, directory); |
82330e7f | 789 | if (! STRINGP (default_directory)) |
dd693537 EZ |
790 | { |
791 | #ifdef DOS_NT | |
792 | /* "/" is not considered a root directory on DOS_NT, so using "/" | |
793 | here causes an infinite recursion in, e.g., the following: | |
794 | ||
795 | (let (default-directory) | |
796 | (expand-file-name "a")) | |
797 | ||
798 | To avoid this, we set default_directory to the root of the | |
799 | current drive. */ | |
dd693537 EZ |
800 | default_directory = build_string (emacs_root_dir ()); |
801 | #else | |
802 | default_directory = build_string ("/"); | |
803 | #endif | |
804 | } | |
58fc9587 | 805 | |
3b7f6e60 | 806 | if (!NILP (default_directory)) |
273e0829 | 807 | { |
3b7f6e60 | 808 | handler = Ffind_file_name_handler (default_directory, Qexpand_file_name); |
273e0829 | 809 | if (!NILP (handler)) |
2375c96a CY |
810 | { |
811 | handled_name = call3 (handler, Qexpand_file_name, | |
812 | name, default_directory); | |
813 | if (STRINGP (handled_name)) | |
814 | return handled_name; | |
815 | error ("Invalid handler in `file-name-handler-alist'"); | |
816 | } | |
273e0829 | 817 | } |
0bf2eed2 | 818 | |
5b5a2ea1 | 819 | { |
5976c3fe | 820 | char *o = SSDATA (default_directory); |
5b5a2ea1 SM |
821 | |
822 | /* Make sure DEFAULT_DIRECTORY is properly expanded. | |
823 | It would be better to do this down below where we actually use | |
824 | default_directory. Unfortunately, calling Fexpand_file_name recursively | |
825 | could invoke GC, and the strings might be relocated. This would | |
826 | be annoying because we have pointers into strings lying around | |
827 | that would need adjusting, and people would add new pointers to | |
828 | the code and forget to adjust them, resulting in intermittent bugs. | |
829 | Putting this call here avoids all that crud. | |
830 | ||
831 | The EQ test avoids infinite recursion. */ | |
832 | if (! NILP (default_directory) && !EQ (default_directory, name) | |
833 | /* Save time in some common cases - as long as default_directory | |
834 | is not relative, it can be canonicalized with name below (if it | |
835 | is needed at all) without requiring it to be expanded now. */ | |
01937013 | 836 | #ifdef DOS_NT |
5b5a2ea1 SM |
837 | /* Detect MSDOS file names with drive specifiers. */ |
838 | && ! (IS_DRIVE (o[0]) && IS_DEVICE_SEP (o[1]) | |
839 | && IS_DIRECTORY_SEP (o[2])) | |
199607e4 | 840 | #ifdef WINDOWSNT |
5b5a2ea1 SM |
841 | /* Detect Windows file names in UNC format. */ |
842 | && ! (IS_DIRECTORY_SEP (o[0]) && IS_DIRECTORY_SEP (o[1])) | |
01937013 | 843 | #endif |
199607e4 RS |
844 | #else /* not DOS_NT */ |
845 | /* Detect Unix absolute file names (/... alone is not absolute on | |
846 | DOS or Windows). */ | |
5b5a2ea1 | 847 | && ! (IS_DIRECTORY_SEP (o[0])) |
199607e4 | 848 | #endif /* not DOS_NT */ |
5b5a2ea1 SM |
849 | ) |
850 | { | |
851 | struct gcpro gcpro1; | |
f14b1c68 | 852 | |
5b5a2ea1 SM |
853 | GCPRO1 (name); |
854 | default_directory = Fexpand_file_name (default_directory, Qnil); | |
855 | UNGCPRO; | |
856 | } | |
857 | } | |
2b046a72 | 858 | multibyte = STRING_MULTIBYTE (name); |
6d060996 KH |
859 | if (multibyte != STRING_MULTIBYTE (default_directory)) |
860 | { | |
861 | if (multibyte) | |
862 | default_directory = string_to_multibyte (default_directory); | |
863 | else | |
864 | { | |
865 | name = string_to_multibyte (name); | |
866 | multibyte = 1; | |
867 | } | |
868 | } | |
869 | ||
e8d32c7e | 870 | /* Make a local copy of nm[] to protect it from GC in DECODE_FILE below. */ |
38182d90 | 871 | nm = alloca (SBYTES (name) + 1); |
5976c3fe | 872 | memcpy (nm, SSDATA (name), SBYTES (name) + 1); |
199607e4 | 873 | |
565f0b98 | 874 | #ifdef DOS_NT |
f0f95d31 RS |
875 | /* Note if special escape prefix is present, but remove for now. */ |
876 | if (nm[0] == '/' && nm[1] == ':') | |
877 | { | |
878 | is_escaped = 1; | |
879 | nm += 2; | |
880 | } | |
881 | ||
199607e4 | 882 | /* Find and remove drive specifier if present; this makes nm absolute |
f0f95d31 RS |
883 | even if the rest of the name appears to be relative. Only look for |
884 | drive specifier at the beginning. */ | |
885 | if (IS_DRIVE (nm[0]) && IS_DEVICE_SEP (nm[1])) | |
886 | { | |
5976c3fe | 887 | drive = (unsigned char) nm[0]; |
f0f95d31 RS |
888 | nm += 2; |
889 | } | |
bb1ff1f4 GV |
890 | |
891 | #ifdef WINDOWSNT | |
892 | /* If we see "c://somedir", we want to strip the first slash after the | |
893 | colon when stripping the drive letter. Otherwise, this expands to | |
894 | "//somedir". */ | |
895 | if (drive && IS_DIRECTORY_SEP (nm[0]) && IS_DIRECTORY_SEP (nm[1])) | |
896 | nm++; | |
4c3c22f3 | 897 | |
e8d32c7e | 898 | /* Discard any previous drive specifier if nm is now in UNC format. */ |
199607e4 RS |
899 | if (IS_DIRECTORY_SEP (nm[0]) && IS_DIRECTORY_SEP (nm[1])) |
900 | { | |
901 | drive = 0; | |
902 | } | |
5b5a2ea1 SM |
903 | #endif /* WINDOWSNT */ |
904 | #endif /* DOS_NT */ | |
199607e4 | 905 | |
214378ec GM |
906 | /* If nm is absolute, look for `/./' or `/../' or `//''sequences; if |
907 | none are found, we can probably return right away. We will avoid | |
908 | allocating a new string if name is already fully expanded. */ | |
570d7624 | 909 | if ( |
5e570b75 | 910 | IS_DIRECTORY_SEP (nm[0]) |
199607e4 | 911 | #ifdef MSDOS |
f0f95d31 | 912 | && drive && !is_escaped |
199607e4 RS |
913 | #endif |
914 | #ifdef WINDOWSNT | |
f0f95d31 | 915 | && (drive || IS_DIRECTORY_SEP (nm[1])) && !is_escaped |
199607e4 | 916 | #endif |
570d7624 JB |
917 | ) |
918 | { | |
f14b1c68 JB |
919 | /* If it turns out that the filename we want to return is just a |
920 | suffix of FILENAME, we don't need to go through and edit | |
921 | things; we just need to construct a new string using data | |
922 | starting at the middle of FILENAME. If we set lose to a | |
923 | non-zero value, that means we've discovered that we can't do | |
924 | that cool trick. */ | |
925 | int lose = 0; | |
5976c3fe | 926 | char *p = nm; |
f14b1c68 | 927 | |
570d7624 JB |
928 | while (*p) |
929 | { | |
199607e4 | 930 | /* Since we know the name is absolute, we can assume that each |
c77d647e JB |
931 | element starts with a "/". */ |
932 | ||
c77d647e | 933 | /* "." and ".." are hairy. */ |
5e570b75 | 934 | if (IS_DIRECTORY_SEP (p[0]) |
c77d647e | 935 | && p[1] == '.' |
5e570b75 | 936 | && (IS_DIRECTORY_SEP (p[2]) |
c77d647e | 937 | || p[2] == 0 |
5e570b75 | 938 | || (p[2] == '.' && (IS_DIRECTORY_SEP (p[3]) |
c77d647e | 939 | || p[3] == 0)))) |
570d7624 | 940 | lose = 1; |
214378ec GM |
941 | /* We want to replace multiple `/' in a row with a single |
942 | slash. */ | |
943 | else if (p > nm | |
944 | && IS_DIRECTORY_SEP (p[0]) | |
945 | && IS_DIRECTORY_SEP (p[1])) | |
946 | lose = 1; | |
570d7624 JB |
947 | p++; |
948 | } | |
949 | if (!lose) | |
950 | { | |
199607e4 | 951 | #ifdef DOS_NT |
087fc47a JB |
952 | /* Make sure directories are all separated with /, but |
953 | avoid allocation of a new string when not required. */ | |
954 | dostounix_filename (nm); | |
199607e4 RS |
955 | #ifdef WINDOWSNT |
956 | if (IS_DIRECTORY_SEP (nm[1])) | |
957 | { | |
42a5b22f | 958 | if (strcmp (nm, SSDATA (name)) != 0) |
2b046a72 | 959 | name = make_specified_string (nm, -1, strlen (nm), multibyte); |
199607e4 RS |
960 | } |
961 | else | |
962 | #endif | |
e8d32c7e | 963 | /* Drive must be set, so this is okay. */ |
5976c3fe | 964 | if (strcmp (nm - 2, SSDATA (name)) != 0) |
199607e4 | 965 | { |
3f817c73 KH |
966 | char temp[] = " :"; |
967 | ||
2b046a72 | 968 | name = make_specified_string (nm, -1, p - nm, multibyte); |
3f817c73 KH |
969 | temp[0] = DRIVE_LETTER (drive); |
970 | name = concat2 (build_string (temp), name); | |
199607e4 RS |
971 | } |
972 | return name; | |
973 | #else /* not DOS_NT */ | |
42a5b22f | 974 | if (strcmp (nm, SSDATA (name)) == 0) |
570d7624 | 975 | return name; |
2b046a72 | 976 | return make_specified_string (nm, -1, strlen (nm), multibyte); |
5e570b75 | 977 | #endif /* not DOS_NT */ |
570d7624 JB |
978 | } |
979 | } | |
980 | ||
199607e4 RS |
981 | /* At this point, nm might or might not be an absolute file name. We |
982 | need to expand ~ or ~user if present, otherwise prefix nm with | |
983 | default_directory if nm is not absolute, and finally collapse /./ | |
984 | and /foo/../ sequences. | |
985 | ||
986 | We set newdir to be the appropriate prefix if one is needed: | |
987 | - the relevant user directory if nm starts with ~ or ~user | |
988 | - the specified drive's working dir (DOS/NT only) if nm does not | |
989 | start with / | |
990 | - the value of default_directory. | |
991 | ||
992 | Note that these prefixes are not guaranteed to be absolute (except | |
993 | for the working dir of a drive). Therefore, to ensure we always | |
994 | return an absolute name, if the final prefix is not absolute we | |
995 | append it to the current working directory. */ | |
570d7624 JB |
996 | |
997 | newdir = 0; | |
998 | ||
999 | if (nm[0] == '~') /* prefix ~ */ | |
c77d647e | 1000 | { |
5e570b75 | 1001 | if (IS_DIRECTORY_SEP (nm[1]) |
c77d647e JB |
1002 | || nm[1] == 0) /* ~ by itself */ |
1003 | { | |
6d557778 EZ |
1004 | Lisp_Object tem; |
1005 | ||
5976c3fe PE |
1006 | if (!(newdir = egetenv ("HOME"))) |
1007 | newdir = ""; | |
199607e4 | 1008 | nm++; |
e8d32c7e | 1009 | /* `egetenv' may return a unibyte string, which will bite us since |
6d557778 | 1010 | we expect the directory to be multibyte. */ |
9c06a1f3 EZ |
1011 | tem = build_string (newdir); |
1012 | if (!STRING_MULTIBYTE (tem)) | |
1013 | { | |
1014 | hdir = DECODE_FILE (tem); | |
5976c3fe | 1015 | newdir = SSDATA (hdir); |
9c06a1f3 | 1016 | } |
5e570b75 | 1017 | #ifdef DOS_NT |
9a1dc3be | 1018 | collapse_newdir = 0; |
4c3c22f3 | 1019 | #endif |
c77d647e JB |
1020 | } |
1021 | else /* ~user/filename */ | |
1022 | { | |
5976c3fe | 1023 | char *o, *p; |
7c2fb837 | 1024 | for (p = nm; *p && (!IS_DIRECTORY_SEP (*p)); p++); |
5b5a2ea1 | 1025 | o = alloca (p - nm + 1); |
72af86bd | 1026 | memcpy (o, nm, p - nm); |
c77d647e JB |
1027 | o [p - nm] = 0; |
1028 | ||
67c08d6c | 1029 | BLOCK_INPUT; |
c77d647e | 1030 | pw = (struct passwd *) getpwnam (o + 1); |
67c08d6c | 1031 | UNBLOCK_INPUT; |
c77d647e JB |
1032 | if (pw) |
1033 | { | |
5976c3fe | 1034 | newdir = pw->pw_dir; |
c77d647e | 1035 | nm = p; |
199607e4 | 1036 | #ifdef DOS_NT |
9a1dc3be | 1037 | collapse_newdir = 0; |
199607e4 | 1038 | #endif |
c77d647e | 1039 | } |
e5d77022 | 1040 | |
c77d647e JB |
1041 | /* If we don't find a user of that name, leave the name |
1042 | unchanged; don't move nm forward to p. */ | |
1043 | } | |
1044 | } | |
570d7624 | 1045 | |
5e570b75 | 1046 | #ifdef DOS_NT |
199607e4 RS |
1047 | /* On DOS and Windows, nm is absolute if a drive name was specified; |
1048 | use the drive's current directory as the prefix if needed. */ | |
1049 | if (!newdir && drive) | |
1050 | { | |
e8d32c7e | 1051 | /* Get default directory if needed to make nm absolute. */ |
2893f146 | 1052 | char *adir = NULL; |
199607e4 RS |
1053 | if (!IS_DIRECTORY_SEP (nm[0])) |
1054 | { | |
2893f146 PE |
1055 | adir = alloca (MAXPATHLEN + 1); |
1056 | if (!getdefdir (toupper (drive) - 'A' + 1, adir)) | |
1057 | adir = NULL; | |
199607e4 | 1058 | } |
2893f146 | 1059 | if (!adir) |
199607e4 | 1060 | { |
e8d32c7e | 1061 | /* Either nm starts with /, or drive isn't mounted. */ |
2893f146 PE |
1062 | adir = alloca (4); |
1063 | adir[0] = DRIVE_LETTER (drive); | |
1064 | adir[1] = ':'; | |
1065 | adir[2] = '/'; | |
1066 | adir[3] = 0; | |
199607e4 | 1067 | } |
2893f146 | 1068 | newdir = adir; |
199607e4 | 1069 | } |
5e570b75 | 1070 | #endif /* DOS_NT */ |
199607e4 RS |
1071 | |
1072 | /* Finally, if no prefix has been specified and nm is not absolute, | |
e8d32c7e | 1073 | then it must be expanded relative to default_directory. */ |
199607e4 | 1074 | |
34097368 | 1075 | if (1 |
199607e4 | 1076 | #ifndef DOS_NT |
e8d32c7e | 1077 | /* /... alone is not absolute on DOS and Windows. */ |
34097368 | 1078 | && !IS_DIRECTORY_SEP (nm[0]) |
199607e4 RS |
1079 | #endif |
1080 | #ifdef WINDOWSNT | |
34097368 | 1081 | && !(IS_DIRECTORY_SEP (nm[0]) && IS_DIRECTORY_SEP (nm[1])) |
199607e4 | 1082 | #endif |
570d7624 JB |
1083 | && !newdir) |
1084 | { | |
5976c3fe | 1085 | newdir = SSDATA (default_directory); |
f0f95d31 RS |
1086 | #ifdef DOS_NT |
1087 | /* Note if special escape prefix is present, but remove for now. */ | |
1088 | if (newdir[0] == '/' && newdir[1] == ':') | |
1089 | { | |
1090 | is_escaped = 1; | |
1091 | newdir += 2; | |
1092 | } | |
1093 | #endif | |
570d7624 JB |
1094 | } |
1095 | ||
5e570b75 | 1096 | #ifdef DOS_NT |
199607e4 RS |
1097 | if (newdir) |
1098 | { | |
e8d32c7e | 1099 | /* First ensure newdir is an absolute name. */ |
199607e4 RS |
1100 | if ( |
1101 | /* Detect MSDOS file names with drive specifiers. */ | |
1102 | ! (IS_DRIVE (newdir[0]) | |
1103 | && IS_DEVICE_SEP (newdir[1]) && IS_DIRECTORY_SEP (newdir[2])) | |
1104 | #ifdef WINDOWSNT | |
1105 | /* Detect Windows file names in UNC format. */ | |
1106 | && ! (IS_DIRECTORY_SEP (newdir[0]) && IS_DIRECTORY_SEP (newdir[1])) | |
1107 | #endif | |
1108 | ) | |
1109 | { | |
1110 | /* Effectively, let newdir be (expand-file-name newdir cwd). | |
1111 | Because of the admonition against calling expand-file-name | |
1112 | when we have pointers into lisp strings, we accomplish this | |
1113 | indirectly by prepending newdir to nm if necessary, and using | |
e8d32c7e | 1114 | cwd (or the wd of newdir's drive) as the new newdir. */ |
2893f146 | 1115 | char *adir; |
c70a4df6 | 1116 | if (IS_DRIVE (newdir[0]) && IS_DEVICE_SEP (newdir[1])) |
199607e4 | 1117 | { |
5976c3fe | 1118 | drive = (unsigned char) newdir[0]; |
199607e4 RS |
1119 | newdir += 2; |
1120 | } | |
1121 | if (!IS_DIRECTORY_SEP (nm[0])) | |
1122 | { | |
c293e30c DA |
1123 | ptrdiff_t newlen = strlen (newdir); |
1124 | char *tmp = alloca (newlen + strlen (nm) + 2); | |
1125 | file_name_as_directory (tmp, newdir, newlen); | |
199607e4 RS |
1126 | strcat (tmp, nm); |
1127 | nm = tmp; | |
1128 | } | |
2893f146 | 1129 | adir = alloca (MAXPATHLEN + 1); |
199607e4 RS |
1130 | if (drive) |
1131 | { | |
2893f146 | 1132 | if (!getdefdir (toupper (drive) - 'A' + 1, adir)) |
199607e4 RS |
1133 | newdir = "/"; |
1134 | } | |
1135 | else | |
2893f146 PE |
1136 | getwd (adir); |
1137 | newdir = adir; | |
199607e4 RS |
1138 | } |
1139 | ||
e8d32c7e | 1140 | /* Strip off drive name from prefix, if present. */ |
c70a4df6 | 1141 | if (IS_DRIVE (newdir[0]) && IS_DEVICE_SEP (newdir[1])) |
199607e4 RS |
1142 | { |
1143 | drive = newdir[0]; | |
1144 | newdir += 2; | |
1145 | } | |
1146 | ||
1147 | /* Keep only a prefix from newdir if nm starts with slash | |
82330e7f | 1148 | (//server/share for UNC, nothing otherwise). */ |
9a1dc3be | 1149 | if (IS_DIRECTORY_SEP (nm[0]) && collapse_newdir) |
199607e4 RS |
1150 | { |
1151 | #ifdef WINDOWSNT | |
1152 | if (IS_DIRECTORY_SEP (newdir[0]) && IS_DIRECTORY_SEP (newdir[1])) | |
1153 | { | |
2893f146 PE |
1154 | char *adir = strcpy (alloca (strlen (newdir) + 1), newdir); |
1155 | char *p = adir + 2; | |
199607e4 RS |
1156 | while (*p && !IS_DIRECTORY_SEP (*p)) p++; |
1157 | p++; | |
1158 | while (*p && !IS_DIRECTORY_SEP (*p)) p++; | |
1159 | *p = 0; | |
2893f146 | 1160 | newdir = adir; |
199607e4 RS |
1161 | } |
1162 | else | |
1163 | #endif | |
1164 | newdir = ""; | |
1165 | } | |
1166 | } | |
5e570b75 | 1167 | #endif /* DOS_NT */ |
199607e4 RS |
1168 | |
1169 | if (newdir) | |
bfb61299 | 1170 | { |
57676091 | 1171 | /* Get rid of any slash at the end of newdir, unless newdir is |
f0f95d31 | 1172 | just / or // (an incomplete UNC name). */ |
199607e4 | 1173 | length = strlen (newdir); |
c293e30c | 1174 | tlen = length + 1; |
f0f95d31 | 1175 | if (length > 1 && IS_DIRECTORY_SEP (newdir[length - 1]) |
57676091 RS |
1176 | #ifdef WINDOWSNT |
1177 | && !(length == 2 && IS_DIRECTORY_SEP (newdir[0])) | |
1178 | #endif | |
1179 | ) | |
bfb61299 | 1180 | { |
38182d90 | 1181 | char *temp = alloca (length); |
72af86bd | 1182 | memcpy (temp, newdir, length - 1); |
bfb61299 | 1183 | temp[length - 1] = 0; |
c293e30c | 1184 | length--; |
bfb61299 JB |
1185 | newdir = temp; |
1186 | } | |
bfb61299 JB |
1187 | } |
1188 | else | |
c293e30c DA |
1189 | { |
1190 | length = 0; | |
1191 | tlen = 0; | |
1192 | } | |
570d7624 | 1193 | |
e8d32c7e | 1194 | /* Now concatenate the directory and name to new space in the stack frame. */ |
bfb61299 | 1195 | tlen += strlen (nm) + 1; |
5e570b75 | 1196 | #ifdef DOS_NT |
f0f95d31 RS |
1197 | /* Reserve space for drive specifier and escape prefix, since either |
1198 | or both may need to be inserted. (The Microsoft x86 compiler | |
5e570b75 | 1199 | produces incorrect code if the following two lines are combined.) */ |
38182d90 | 1200 | target = alloca (tlen + 4); |
f0f95d31 | 1201 | target += 4; |
5e570b75 | 1202 | #else /* not DOS_NT */ |
38182d90 | 1203 | target = alloca (tlen); |
5e570b75 | 1204 | #endif /* not DOS_NT */ |
570d7624 JB |
1205 | *target = 0; |
1206 | ||
1207 | if (newdir) | |
1208 | { | |
5e570b75 | 1209 | if (nm[0] == 0 || IS_DIRECTORY_SEP (nm[0])) |
f5321b5c | 1210 | { |
3ea2d8b2 | 1211 | #ifdef DOS_NT |
f5321b5c RS |
1212 | /* If newdir is effectively "C:/", then the drive letter will have |
1213 | been stripped and newdir will be "/". Concatenating with an | |
1214 | absolute directory in nm produces "//", which will then be | |
1215 | incorrectly treated as a network share. Ignore newdir in | |
1216 | this case (keeping the drive letter). */ | |
efdc16c9 | 1217 | if (!(drive && nm[0] && IS_DIRECTORY_SEP (newdir[0]) |
f5321b5c RS |
1218 | && newdir[1] == '\0')) |
1219 | #endif | |
1220 | strcpy (target, newdir); | |
1221 | } | |
570d7624 | 1222 | else |
c293e30c | 1223 | file_name_as_directory (target, newdir, length); |
570d7624 JB |
1224 | } |
1225 | ||
1226 | strcat (target, nm); | |
199607e4 | 1227 | |
214378ec GM |
1228 | /* Now canonicalize by removing `//', `/.' and `/foo/..' if they |
1229 | appear. */ | |
5b5a2ea1 | 1230 | { |
5976c3fe PE |
1231 | char *p = target; |
1232 | char *o = target; | |
570d7624 | 1233 | |
5b5a2ea1 SM |
1234 | while (*p) |
1235 | { | |
5b5a2ea1 SM |
1236 | if (!IS_DIRECTORY_SEP (*p)) |
1237 | { | |
1238 | *o++ = *p++; | |
1239 | } | |
1240 | else if (p[1] == '.' | |
1241 | && (IS_DIRECTORY_SEP (p[2]) | |
1242 | || p[2] == 0)) | |
1243 | { | |
1244 | /* If "/." is the entire filename, keep the "/". Otherwise, | |
1245 | just delete the whole "/.". */ | |
1246 | if (o == target && p[2] == '\0') | |
1247 | *o++ = *p; | |
1248 | p += 2; | |
1249 | } | |
1250 | else if (p[1] == '.' && p[2] == '.' | |
1251 | /* `/../' is the "superroot" on certain file systems. | |
1252 | Turned off on DOS_NT systems because they have no | |
1253 | "superroot" and because this causes us to produce | |
1254 | file names like "d:/../foo" which fail file-related | |
1255 | functions of the underlying OS. (To reproduce, try a | |
1256 | long series of "../../" in default_directory, longer | |
1257 | than the number of levels from the root.) */ | |
aa4060b9 | 1258 | #ifndef DOS_NT |
5b5a2ea1 | 1259 | && o != target |
aa4060b9 | 1260 | #endif |
5b5a2ea1 SM |
1261 | && (IS_DIRECTORY_SEP (p[3]) || p[3] == 0)) |
1262 | { | |
972ed246 | 1263 | #ifdef WINDOWSNT |
5976c3fe | 1264 | char *prev_o = o; |
972ed246 | 1265 | #endif |
5b5a2ea1 SM |
1266 | while (o != target && (--o) && !IS_DIRECTORY_SEP (*o)) |
1267 | ; | |
972ed246 JR |
1268 | #ifdef WINDOWSNT |
1269 | /* Don't go below server level in UNC filenames. */ | |
1270 | if (o == target + 1 && IS_DIRECTORY_SEP (*o) | |
1271 | && IS_DIRECTORY_SEP (*target)) | |
1272 | o = prev_o; | |
1273 | else | |
1274 | #endif | |
5b5a2ea1 SM |
1275 | /* Keep initial / only if this is the whole name. */ |
1276 | if (o == target && IS_ANY_SEP (*o) && p[3] == 0) | |
1277 | ++o; | |
1278 | p += 3; | |
1279 | } | |
1280 | else if (p > target && IS_DIRECTORY_SEP (p[1])) | |
1281 | /* Collapse multiple `/' in a row. */ | |
1282 | p++; | |
1283 | else | |
1284 | { | |
1285 | *o++ = *p++; | |
1286 | } | |
5b5a2ea1 | 1287 | } |
570d7624 | 1288 | |
5e570b75 | 1289 | #ifdef DOS_NT |
e8d32c7e | 1290 | /* At last, set drive name. */ |
5e570b75 | 1291 | #ifdef WINDOWSNT |
5b5a2ea1 SM |
1292 | /* Except for network file name. */ |
1293 | if (!(IS_DIRECTORY_SEP (target[0]) && IS_DIRECTORY_SEP (target[1]))) | |
5e570b75 | 1294 | #endif /* WINDOWSNT */ |
5b5a2ea1 SM |
1295 | { |
1296 | if (!drive) abort (); | |
1297 | target -= 2; | |
1298 | target[0] = DRIVE_LETTER (drive); | |
1299 | target[1] = ':'; | |
1300 | } | |
1301 | /* Reinsert the escape prefix if required. */ | |
1302 | if (is_escaped) | |
1303 | { | |
1304 | target -= 2; | |
1305 | target[0] = '/'; | |
1306 | target[1] = ':'; | |
1307 | } | |
087fc47a | 1308 | dostounix_filename (target); |
5e570b75 | 1309 | #endif /* DOS_NT */ |
4c3c22f3 | 1310 | |
5b5a2ea1 SM |
1311 | result = make_specified_string (target, -1, o - target, multibyte); |
1312 | } | |
beb402de KG |
1313 | |
1314 | /* Again look to see if the file name has special constructs in it | |
1315 | and perhaps call the corresponding file handler. This is needed | |
1316 | for filenames such as "/foo/../user@host:/bar/../baz". Expanding | |
1317 | the ".." component gives us "/user@host:/bar/../baz" which needs | |
e8d32c7e | 1318 | to be expanded again. */ |
beb402de KG |
1319 | handler = Ffind_file_name_handler (result, Qexpand_file_name); |
1320 | if (!NILP (handler)) | |
2375c96a CY |
1321 | { |
1322 | handled_name = call3 (handler, Qexpand_file_name, | |
1323 | result, default_directory); | |
1324 | if (STRINGP (handled_name)) | |
1325 | return handled_name; | |
1326 | error ("Invalid handler in `file-name-handler-alist'"); | |
1327 | } | |
beb402de KG |
1328 | |
1329 | return result; | |
570d7624 | 1330 | } |
5e570b75 | 1331 | |
4887597a EZ |
1332 | #if 0 |
1333 | /* PLEASE DO NOT DELETE THIS COMMENTED-OUT VERSION! | |
1334 | This is the old version of expand-file-name, before it was thoroughly | |
1335 | rewritten for Emacs 10.31. We leave this version here commented-out, | |
1336 | because the code is very complex and likely to have subtle bugs. If | |
1337 | bugs _are_ found, it might be of interest to look at the old code and | |
1338 | see what did it do in the relevant situation. | |
1339 | ||
30f50381 GM |
1340 | Don't remove this code: it's true that it will be accessible |
1341 | from the repository, but a few years from deletion, people will | |
1342 | forget it is there. */ | |
4887597a EZ |
1343 | |
1344 | /* Changed this DEFUN to a DEAFUN, so as not to confuse `make-docfile'. */ | |
1345 | DEAFUN ("expand-file-name", Fexpand_file_name, Sexpand_file_name, 1, 2, 0, | |
1346 | "Convert FILENAME to absolute, and canonicalize it.\n\ | |
1347 | Second arg DEFAULT is directory to start with if FILENAME is relative\n\ | |
c70a4df6 | 1348 | \(does not start with slash); if DEFAULT is nil or missing,\n\ |
4887597a EZ |
1349 | the current buffer's value of default-directory is used.\n\ |
1350 | Filenames containing `.' or `..' as components are simplified;\n\ | |
1351 | initial `~/' expands to your home directory.\n\ | |
1352 | See also the function `substitute-in-file-name'.") | |
1353 | (name, defalt) | |
1354 | Lisp_Object name, defalt; | |
1355 | { | |
1356 | unsigned char *nm; | |
1357 | ||
1358 | register unsigned char *newdir, *p, *o; | |
93f4cf88 | 1359 | ptrdiff_t tlen; |
4887597a EZ |
1360 | unsigned char *target; |
1361 | struct passwd *pw; | |
1362 | int lose; | |
4887597a | 1363 | |
b7826503 | 1364 | CHECK_STRING (name); |
d5db4077 | 1365 | nm = SDATA (name); |
4887597a EZ |
1366 | |
1367 | /* If nm is absolute, flush ...// and detect /./ and /../. | |
1368 | If no /./ or /../ we can return right away. */ | |
7c2fb837 | 1369 | if (nm[0] == '/') |
4887597a EZ |
1370 | { |
1371 | p = nm; | |
1372 | lose = 0; | |
1373 | while (*p) | |
1374 | { | |
1375 | if (p[0] == '/' && p[1] == '/' | |
4887597a EZ |
1376 | ) |
1377 | nm = p + 1; | |
1378 | if (p[0] == '/' && p[1] == '~') | |
1379 | nm = p + 1, lose = 1; | |
1380 | if (p[0] == '/' && p[1] == '.' | |
1381 | && (p[2] == '/' || p[2] == 0 | |
1382 | || (p[2] == '.' && (p[3] == '/' || p[3] == 0)))) | |
1383 | lose = 1; | |
4887597a EZ |
1384 | p++; |
1385 | } | |
1386 | if (!lose) | |
1387 | { | |
d5db4077 | 1388 | if (nm == SDATA (name)) |
4887597a EZ |
1389 | return name; |
1390 | return build_string (nm); | |
1391 | } | |
1392 | } | |
1393 | ||
e8d32c7e | 1394 | /* Now determine directory to start with and put it in NEWDIR. */ |
4887597a EZ |
1395 | |
1396 | newdir = 0; | |
1397 | ||
1398 | if (nm[0] == '~') /* prefix ~ */ | |
7c2fb837 | 1399 | if (nm[1] == '/' || nm[1] == 0)/* ~/filename */ |
4887597a EZ |
1400 | { |
1401 | if (!(newdir = (unsigned char *) egetenv ("HOME"))) | |
1402 | newdir = (unsigned char *) ""; | |
1403 | nm++; | |
4887597a EZ |
1404 | } |
1405 | else /* ~user/filename */ | |
1406 | { | |
e8d32c7e | 1407 | /* Get past ~ to user. */ |
4887597a | 1408 | unsigned char *user = nm + 1; |
e8d32c7e | 1409 | /* Find end of name. */ |
8966b757 | 1410 | unsigned char *ptr = (unsigned char *) strchr (user, '/'); |
93f4cf88 | 1411 | ptrdiff_t len = ptr ? ptr - user : strlen (user); |
e8d32c7e | 1412 | /* Copy the user name into temp storage. */ |
38182d90 | 1413 | o = alloca (len + 1); |
72af86bd | 1414 | memcpy (o, user, len); |
4887597a EZ |
1415 | o[len] = 0; |
1416 | ||
e8d32c7e | 1417 | /* Look up the user name. */ |
67c08d6c | 1418 | BLOCK_INPUT; |
4887597a | 1419 | pw = (struct passwd *) getpwnam (o + 1); |
67c08d6c | 1420 | UNBLOCK_INPUT; |
4887597a EZ |
1421 | if (!pw) |
1422 | error ("\"%s\" isn't a registered user", o + 1); | |
1423 | ||
1424 | newdir = (unsigned char *) pw->pw_dir; | |
1425 | ||
1426 | /* Discard the user name from NM. */ | |
1427 | nm += len; | |
1428 | } | |
1429 | ||
7c2fb837 | 1430 | if (nm[0] != '/' && !newdir) |
4887597a EZ |
1431 | { |
1432 | if (NILP (defalt)) | |
1433 | defalt = current_buffer->directory; | |
b7826503 | 1434 | CHECK_STRING (defalt); |
d5db4077 | 1435 | newdir = SDATA (defalt); |
4887597a EZ |
1436 | } |
1437 | ||
e8d32c7e | 1438 | /* Now concatenate the directory and name to new space in the stack frame. */ |
4887597a EZ |
1439 | |
1440 | tlen = (newdir ? strlen (newdir) + 1 : 0) + strlen (nm) + 1; | |
38182d90 | 1441 | target = alloca (tlen); |
4887597a EZ |
1442 | *target = 0; |
1443 | ||
1444 | if (newdir) | |
1445 | { | |
4887597a EZ |
1446 | if (nm[0] == 0 || nm[0] == '/') |
1447 | strcpy (target, newdir); | |
1448 | else | |
4887597a EZ |
1449 | file_name_as_directory (target, newdir); |
1450 | } | |
1451 | ||
1452 | strcat (target, nm); | |
4887597a | 1453 | |
e8d32c7e | 1454 | /* Now canonicalize by removing /. and /foo/.. if they appear. */ |
4887597a EZ |
1455 | |
1456 | p = target; | |
1457 | o = target; | |
1458 | ||
1459 | while (*p) | |
1460 | { | |
4887597a EZ |
1461 | if (*p != '/') |
1462 | { | |
1463 | *o++ = *p++; | |
1464 | } | |
1465 | else if (!strncmp (p, "//", 2) | |
4887597a EZ |
1466 | ) |
1467 | { | |
1468 | o = target; | |
1469 | p++; | |
1470 | } | |
994a7262 RS |
1471 | else if (p[0] == '/' && p[1] == '.' |
1472 | && (p[2] == '/' || p[2] == 0)) | |
4887597a EZ |
1473 | p += 2; |
1474 | else if (!strncmp (p, "/..", 3) | |
1475 | /* `/../' is the "superroot" on certain file systems. */ | |
1476 | && o != target | |
1477 | && (p[3] == '/' || p[3] == 0)) | |
1478 | { | |
1479 | while (o != target && *--o != '/') | |
1480 | ; | |
4887597a EZ |
1481 | if (o == target && *o == '/') |
1482 | ++o; | |
1483 | p += 3; | |
1484 | } | |
1485 | else | |
1486 | { | |
1487 | *o++ = *p++; | |
1488 | } | |
4887597a EZ |
1489 | } |
1490 | ||
1491 | return make_string (target, o - target); | |
1492 | } | |
1493 | #endif | |
570d7624 | 1494 | \f |
c70a4df6 SM |
1495 | /* If /~ or // appears, discard everything through first slash. */ |
1496 | static int | |
5976c3fe | 1497 | file_name_absolute_p (const char *filename) |
c70a4df6 SM |
1498 | { |
1499 | return | |
1500 | (IS_DIRECTORY_SEP (*filename) || *filename == '~' | |
c70a4df6 SM |
1501 | #ifdef DOS_NT |
1502 | || (IS_DRIVE (*filename) && IS_DEVICE_SEP (filename[1]) | |
1503 | && IS_DIRECTORY_SEP (filename[2])) | |
1504 | #endif | |
1505 | ); | |
1506 | } | |
1507 | ||
5976c3fe PE |
1508 | static char * |
1509 | search_embedded_absfilename (char *nm, char *endp) | |
c70a4df6 | 1510 | { |
5976c3fe | 1511 | char *p, *s; |
c70a4df6 SM |
1512 | |
1513 | for (p = nm + 1; p < endp; p++) | |
1514 | { | |
1515 | if ((0 | |
c70a4df6 SM |
1516 | || IS_DIRECTORY_SEP (p[-1])) |
1517 | && file_name_absolute_p (p) | |
5e617bc2 | 1518 | #if defined (WINDOWSNT) || defined (CYGWIN) |
c70a4df6 SM |
1519 | /* // at start of file name is meaningful in Apollo, |
1520 | WindowsNT and Cygwin systems. */ | |
f34574c6 | 1521 | && !(IS_DIRECTORY_SEP (p[0]) && p - 1 == nm) |
e39a993c | 1522 | #endif /* not (WINDOWSNT || CYGWIN) */ |
c70a4df6 SM |
1523 | ) |
1524 | { | |
7c2fb837 | 1525 | for (s = p; *s && (!IS_DIRECTORY_SEP (*s)); s++); |
e8d32c7e | 1526 | if (p[0] == '~' && s > p + 1) /* We've got "/~something/". */ |
c70a4df6 | 1527 | { |
5976c3fe | 1528 | char *o = alloca (s - p + 1); |
c70a4df6 | 1529 | struct passwd *pw; |
72af86bd | 1530 | memcpy (o, p, s - p); |
c70a4df6 SM |
1531 | o [s - p] = 0; |
1532 | ||
1533 | /* If we have ~user and `user' exists, discard | |
1534 | everything up to ~. But if `user' does not exist, leave | |
1535 | ~user alone, it might be a literal file name. */ | |
67c08d6c YM |
1536 | BLOCK_INPUT; |
1537 | pw = getpwnam (o + 1); | |
1538 | UNBLOCK_INPUT; | |
1539 | if (pw) | |
c70a4df6 | 1540 | return p; |
c70a4df6 SM |
1541 | } |
1542 | else | |
1543 | return p; | |
1544 | } | |
1545 | } | |
1546 | return NULL; | |
1547 | } | |
1548 | ||
a7ca3326 | 1549 | DEFUN ("substitute-in-file-name", Fsubstitute_in_file_name, |
8c1a1077 PJ |
1550 | Ssubstitute_in_file_name, 1, 1, 0, |
1551 | doc: /* Substitute environment variables referred to in FILENAME. | |
1552 | `$FOO' where FOO is an environment variable name means to substitute | |
1553 | the value of that variable. The variable name should be terminated | |
1554 | with a character not a letter, digit or underscore; otherwise, enclose | |
1555 | the entire variable name in braces. | |
c68845e0 GM |
1556 | |
1557 | If `/~' appears, all of FILENAME through that `/' is discarded. | |
1558 | If `//' appears, everything up to and including the first of | |
1559 | those `/' is discarded. */) | |
5842a27b | 1560 | (Lisp_Object filename) |
570d7624 | 1561 | { |
5976c3fe | 1562 | char *nm; |
570d7624 | 1563 | |
5976c3fe PE |
1564 | register char *s, *p, *o, *x, *endp; |
1565 | char *target = NULL; | |
570d7624 JB |
1566 | int total = 0; |
1567 | int substituted = 0; | |
58aec0d6 | 1568 | int multibyte; |
5976c3fe | 1569 | char *xnm; |
8ce069f5 | 1570 | Lisp_Object handler; |
570d7624 | 1571 | |
b7826503 | 1572 | CHECK_STRING (filename); |
570d7624 | 1573 | |
58aec0d6 JR |
1574 | multibyte = STRING_MULTIBYTE (filename); |
1575 | ||
8ce069f5 RS |
1576 | /* If the file name has special constructs in it, |
1577 | call the corresponding file handler. */ | |
3b7f6e60 | 1578 | handler = Ffind_file_name_handler (filename, Qsubstitute_in_file_name); |
8ce069f5 | 1579 | if (!NILP (handler)) |
2375c96a CY |
1580 | { |
1581 | Lisp_Object handled_name = call2 (handler, Qsubstitute_in_file_name, | |
1582 | filename); | |
1583 | if (STRINGP (handled_name)) | |
1584 | return handled_name; | |
1585 | error ("Invalid handler in `file-name-handler-alist'"); | |
1586 | } | |
8ce069f5 | 1587 | |
58aec0d6 JR |
1588 | /* Always work on a copy of the string, in case GC happens during |
1589 | decode of environment variables, causing the original Lisp_String | |
1590 | data to be relocated. */ | |
38182d90 | 1591 | nm = alloca (SBYTES (filename) + 1); |
72af86bd | 1592 | memcpy (nm, SDATA (filename), SBYTES (filename) + 1); |
0f3f018c | 1593 | |
58aec0d6 | 1594 | #ifdef DOS_NT |
087fc47a | 1595 | dostounix_filename (nm); |
d5db4077 | 1596 | substituted = (strcmp (nm, SDATA (filename)) != 0); |
a5a1cc06 | 1597 | #endif |
d5db4077 | 1598 | endp = nm + SBYTES (filename); |
570d7624 | 1599 | |
82330e7f | 1600 | /* If /~ or // appears, discard everything through first slash. */ |
c70a4df6 SM |
1601 | p = search_embedded_absfilename (nm, endp); |
1602 | if (p) | |
1603 | /* Start over with the new string, so we check the file-name-handler | |
1604 | again. Important with filenames like "/home/foo//:/hello///there" | |
ee7683eb | 1605 | which would substitute to "/:/hello///there" rather than "/there". */ |
c70a4df6 | 1606 | return Fsubstitute_in_file_name |
58aec0d6 | 1607 | (make_specified_string (p, -1, endp - p, multibyte)); |
570d7624 JB |
1608 | |
1609 | /* See if any variables are substituted into the string | |
e8d32c7e | 1610 | and find the total length of their values in `total'. */ |
570d7624 JB |
1611 | |
1612 | for (p = nm; p != endp;) | |
1613 | if (*p != '$') | |
1614 | p++; | |
1615 | else | |
1616 | { | |
1617 | p++; | |
1618 | if (p == endp) | |
1619 | goto badsubst; | |
1620 | else if (*p == '$') | |
1621 | { | |
e8d32c7e | 1622 | /* "$$" means a single "$". */ |
570d7624 JB |
1623 | p++; |
1624 | total -= 1; | |
1625 | substituted = 1; | |
1626 | continue; | |
1627 | } | |
1628 | else if (*p == '{') | |
1629 | { | |
1630 | o = ++p; | |
1631 | while (p != endp && *p != '}') p++; | |
1632 | if (*p != '}') goto missingclose; | |
1633 | s = p; | |
1634 | } | |
1635 | else | |
1636 | { | |
1637 | o = p; | |
1638 | while (p != endp && (isalnum (*p) || *p == '_')) p++; | |
1639 | s = p; | |
1640 | } | |
1641 | ||
e8d32c7e | 1642 | /* Copy out the variable name. */ |
38182d90 | 1643 | target = alloca (s - o + 1); |
e99a530f | 1644 | memcpy (target, o, s - o); |
570d7624 | 1645 | target[s - o] = 0; |
5e570b75 | 1646 | #ifdef DOS_NT |
4c3c22f3 | 1647 | strupr (target); /* $home == $HOME etc. */ |
5e570b75 | 1648 | #endif /* DOS_NT */ |
570d7624 | 1649 | |
e8d32c7e | 1650 | /* Get variable value. */ |
5976c3fe | 1651 | o = egetenv (target); |
8d2ced53 | 1652 | if (o) |
58aec0d6 JR |
1653 | { |
1654 | /* Don't try to guess a maximum length - UTF8 can use up to | |
1655 | four bytes per character. This code is unlikely to run | |
1656 | in a situation that requires performance, so decoding the | |
1657 | env variables twice should be acceptable. Note that | |
1658 | decoding may cause a garbage collect. */ | |
1659 | Lisp_Object orig, decoded; | |
d7ea76b4 | 1660 | orig = build_unibyte_string (o); |
58aec0d6 JR |
1661 | decoded = DECODE_FILE (orig); |
1662 | total += SBYTES (decoded); | |
8d2ced53 SM |
1663 | substituted = 1; |
1664 | } | |
1665 | else if (*p == '}') | |
1666 | goto badvar; | |
570d7624 JB |
1667 | } |
1668 | ||
1669 | if (!substituted) | |
3b7f6e60 | 1670 | return filename; |
570d7624 | 1671 | |
e8d32c7e SM |
1672 | /* If substitution required, recopy the string and do it. */ |
1673 | /* Make space in stack frame for the new copy. */ | |
38182d90 | 1674 | xnm = alloca (SBYTES (filename) + total + 1); |
570d7624 JB |
1675 | x = xnm; |
1676 | ||
e8d32c7e | 1677 | /* Copy the rest of the name through, replacing $ constructs with values. */ |
570d7624 JB |
1678 | for (p = nm; *p;) |
1679 | if (*p != '$') | |
1680 | *x++ = *p++; | |
1681 | else | |
1682 | { | |
1683 | p++; | |
1684 | if (p == endp) | |
1685 | goto badsubst; | |
1686 | else if (*p == '$') | |
1687 | { | |
1688 | *x++ = *p++; | |
1689 | continue; | |
1690 | } | |
1691 | else if (*p == '{') | |
1692 | { | |
1693 | o = ++p; | |
1694 | while (p != endp && *p != '}') p++; | |
1695 | if (*p != '}') goto missingclose; | |
1696 | s = p++; | |
1697 | } | |
1698 | else | |
1699 | { | |
1700 | o = p; | |
1701 | while (p != endp && (isalnum (*p) || *p == '_')) p++; | |
1702 | s = p; | |
1703 | } | |
1704 | ||
e8d32c7e | 1705 | /* Copy out the variable name. */ |
38182d90 | 1706 | target = alloca (s - o + 1); |
e99a530f | 1707 | memcpy (target, o, s - o); |
570d7624 | 1708 | target[s - o] = 0; |
5e570b75 | 1709 | #ifdef DOS_NT |
4c3c22f3 | 1710 | strupr (target); /* $home == $HOME etc. */ |
5e570b75 | 1711 | #endif /* DOS_NT */ |
570d7624 | 1712 | |
e8d32c7e | 1713 | /* Get variable value. */ |
5976c3fe | 1714 | o = egetenv (target); |
570d7624 | 1715 | if (!o) |
8d2ced53 SM |
1716 | { |
1717 | *x++ = '$'; | |
1718 | strcpy (x, target); x+= strlen (target); | |
1719 | } | |
60d67b83 RS |
1720 | else |
1721 | { | |
58aec0d6 | 1722 | Lisp_Object orig, decoded; |
93f4cf88 | 1723 | ptrdiff_t orig_length, decoded_length; |
58aec0d6 JR |
1724 | orig_length = strlen (o); |
1725 | orig = make_unibyte_string (o, orig_length); | |
1726 | decoded = DECODE_FILE (orig); | |
1727 | decoded_length = SBYTES (decoded); | |
e99a530f | 1728 | memcpy (x, SDATA (decoded), decoded_length); |
58aec0d6 JR |
1729 | x += decoded_length; |
1730 | ||
1731 | /* If environment variable needed decoding, return value | |
1732 | needs to be multibyte. */ | |
1733 | if (decoded_length != orig_length | |
e99a530f | 1734 | || memcmp (SDATA (decoded), o, orig_length)) |
58aec0d6 | 1735 | multibyte = 1; |
60d67b83 | 1736 | } |
570d7624 JB |
1737 | } |
1738 | ||
1739 | *x = 0; | |
1740 | ||
82330e7f | 1741 | /* If /~ or // appears, discard everything through first slash. */ |
c70a4df6 SM |
1742 | while ((p = search_embedded_absfilename (xnm, x))) |
1743 | /* This time we do not start over because we've already expanded envvars | |
1744 | and replaced $$ with $. Maybe we should start over as well, but we'd | |
1745 | need to quote some $ to $$ first. */ | |
1746 | xnm = p; | |
570d7624 | 1747 | |
58aec0d6 | 1748 | return make_specified_string (xnm, -1, x - xnm, multibyte); |
570d7624 JB |
1749 | |
1750 | badsubst: | |
1751 | error ("Bad format environment-variable substitution"); | |
1752 | missingclose: | |
1753 | error ("Missing \"}\" in environment-variable substitution"); | |
1754 | badvar: | |
1755 | error ("Substituting nonexistent environment variable \"%s\"", target); | |
1756 | ||
1757 | /* NOTREACHED */ | |
6bbd7a29 | 1758 | return Qnil; |
570d7624 JB |
1759 | } |
1760 | \f | |
067ffa38 | 1761 | /* A slightly faster and more convenient way to get |
298b760e | 1762 | (directory-file-name (expand-file-name FOO)). */ |
067ffa38 | 1763 | |
570d7624 | 1764 | Lisp_Object |
971de7fb | 1765 | expand_and_dir_to_file (Lisp_Object filename, Lisp_Object defdir) |
570d7624 | 1766 | { |
199607e4 | 1767 | register Lisp_Object absname; |
570d7624 | 1768 | |
199607e4 | 1769 | absname = Fexpand_file_name (filename, defdir); |
7c2fb837 | 1770 | |
199607e4 | 1771 | /* Remove final slash, if any (unless this is the root dir). |
570d7624 | 1772 | stat behaves differently depending! */ |
d5db4077 KR |
1773 | if (SCHARS (absname) > 1 |
1774 | && IS_DIRECTORY_SEP (SREF (absname, SBYTES (absname) - 1)) | |
e8d32c7e | 1775 | && !IS_DEVICE_SEP (SREF (absname, SBYTES (absname) - 2))) |
ddc61f46 | 1776 | /* We cannot take shortcuts; they might be wrong for magic file names. */ |
199607e4 | 1777 | absname = Fdirectory_file_name (absname); |
199607e4 | 1778 | return absname; |
570d7624 JB |
1779 | } |
1780 | \f | |
3ed15d97 RS |
1781 | /* Signal an error if the file ABSNAME already exists. |
1782 | If INTERACTIVE is nonzero, ask the user whether to proceed, | |
1783 | and bypass the error if the user says to go ahead. | |
1784 | QUERYSTRING is a name for the action that is being considered | |
1785 | to alter the file. | |
de1d0127 | 1786 | |
3ed15d97 | 1787 | *STATPTR is used to store the stat information if the file exists. |
de1d0127 | 1788 | If the file does not exist, STATPTR->st_mode is set to 0. |
b8b29dc9 RS |
1789 | If STATPTR is null, we don't store into it. |
1790 | ||
1791 | If QUICK is nonzero, we ask for y or n, not yes or no. */ | |
3ed15d97 | 1792 | |
f14b7e14 | 1793 | static void |
5976c3fe PE |
1794 | barf_or_query_if_file_exists (Lisp_Object absname, const char *querystring, |
1795 | int interactive, struct stat *statptr, int quick) | |
570d7624 | 1796 | { |
643c73b9 | 1797 | register Lisp_Object tem, encoded_filename; |
4018b5ef | 1798 | struct stat statbuf; |
570d7624 JB |
1799 | struct gcpro gcpro1; |
1800 | ||
643c73b9 RS |
1801 | encoded_filename = ENCODE_FILE (absname); |
1802 | ||
e8d32c7e | 1803 | /* `stat' is a good way to tell whether the file exists, |
4018b5ef | 1804 | regardless of what access permissions it has. */ |
42a5b22f | 1805 | if (lstat (SSDATA (encoded_filename), &statbuf) >= 0) |
570d7624 | 1806 | { |
6e9b2be9 | 1807 | if (S_ISDIR (statbuf.st_mode)) |
c4f2d8d4 | 1808 | xsignal2 (Qfile_error, |
ad637907 | 1809 | build_string ("File is a directory"), absname); |
c4f2d8d4 | 1810 | |
570d7624 | 1811 | if (! interactive) |
24b1ddad KS |
1812 | xsignal2 (Qfile_already_exists, |
1813 | build_string ("File already exists"), absname); | |
570d7624 | 1814 | GCPRO1 (absname); |
67e8e2b8 RS |
1815 | tem = format2 ("File %s already exists; %s anyway? ", |
1816 | absname, build_string (querystring)); | |
b8b29dc9 | 1817 | if (quick) |
5616cc54 | 1818 | tem = call1 (intern ("y-or-n-p"), tem); |
b8b29dc9 RS |
1819 | else |
1820 | tem = do_yes_or_no_p (tem); | |
570d7624 | 1821 | UNGCPRO; |
265a9e55 | 1822 | if (NILP (tem)) |
24b1ddad KS |
1823 | xsignal2 (Qfile_already_exists, |
1824 | build_string ("File already exists"), absname); | |
3ed15d97 RS |
1825 | if (statptr) |
1826 | *statptr = statbuf; | |
1827 | } | |
1828 | else | |
1829 | { | |
1830 | if (statptr) | |
1831 | statptr->st_mode = 0; | |
570d7624 JB |
1832 | } |
1833 | return; | |
1834 | } | |
1835 | ||
574c05e2 | 1836 | DEFUN ("copy-file", Fcopy_file, Scopy_file, 2, 6, |
7c0f6118 | 1837 | "fCopy file: \nGCopy %s to file: \np\nP", |
8c1a1077 PJ |
1838 | doc: /* Copy FILE to NEWNAME. Both args must be strings. |
1839 | If NEWNAME names a directory, copy FILE there. | |
795c20df CY |
1840 | |
1841 | This function always sets the file modes of the output file to match | |
1842 | the input file. | |
1843 | ||
1844 | The optional third argument OK-IF-ALREADY-EXISTS specifies what to do | |
1845 | if file NEWNAME already exists. If OK-IF-ALREADY-EXISTS is nil, we | |
1846 | signal a `file-already-exists' error without overwriting. If | |
1847 | OK-IF-ALREADY-EXISTS is a number, we request confirmation from the user | |
1848 | about overwriting; this is what happens in interactive use with M-x. | |
1849 | Any other value for OK-IF-ALREADY-EXISTS means to overwrite the | |
1850 | existing file. | |
c50f15d0 | 1851 | |
7f08b80e | 1852 | Fourth arg KEEP-TIME non-nil means give the output file the same |
8c1a1077 | 1853 | last-modified time as the old one. (This works on only some systems.) |
c50f15d0 | 1854 | |
7fce7dfe EZ |
1855 | A prefix arg makes KEEP-TIME non-nil. |
1856 | ||
586702ce | 1857 | If PRESERVE-UID-GID is non-nil, we try to transfer the |
574c05e2 KK |
1858 | uid and gid of FILE to NEWNAME. |
1859 | ||
f5783df3 | 1860 | If PRESERVE-SELINUX-CONTEXT is non-nil and SELinux is enabled |
574c05e2 | 1861 | on the system, we copy the SELinux context of FILE to NEWNAME. */) |
5842a27b | 1862 | (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 | 1863 | { |
8a2cbd72 | 1864 | int ifd, ofd; |
d311d28c | 1865 | int n; |
570d7624 | 1866 | char buf[16 * 1024]; |
3ed15d97 | 1867 | struct stat st, out_st; |
32f4334d | 1868 | Lisp_Object handler; |
b1d1b865 | 1869 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; |
d311d28c | 1870 | ptrdiff_t count = SPECPDL_INDEX (); |
f73b0ada | 1871 | int input_file_statable_p; |
b1d1b865 | 1872 | Lisp_Object encoded_file, encoded_newname; |
574c05e2 KK |
1873 | #if HAVE_LIBSELINUX |
1874 | security_context_t con; | |
1875 | int fail, conlength = 0; | |
1876 | #endif | |
570d7624 | 1877 | |
b1d1b865 RS |
1878 | encoded_file = encoded_newname = Qnil; |
1879 | GCPRO4 (file, newname, encoded_file, encoded_newname); | |
b7826503 PJ |
1880 | CHECK_STRING (file); |
1881 | CHECK_STRING (newname); | |
b1d1b865 | 1882 | |
a9d14e54 | 1883 | if (!NILP (Ffile_directory_p (newname))) |
6b61353c | 1884 | newname = Fexpand_file_name (Ffile_name_nondirectory (file), newname); |
a9d14e54 GM |
1885 | else |
1886 | newname = Fexpand_file_name (newname, Qnil); | |
1887 | ||
3b7f6e60 | 1888 | file = Fexpand_file_name (file, Qnil); |
32f4334d | 1889 | |
0bf2eed2 | 1890 | /* If the input file name has special constructs in it, |
32f4334d | 1891 | call the corresponding file handler. */ |
3b7f6e60 | 1892 | handler = Ffind_file_name_handler (file, Qcopy_file); |
0bf2eed2 | 1893 | /* Likewise for output file name. */ |
51cf6d37 | 1894 | if (NILP (handler)) |
49307295 | 1895 | handler = Ffind_file_name_handler (newname, Qcopy_file); |
32f4334d | 1896 | if (!NILP (handler)) |
574c05e2 KK |
1897 | RETURN_UNGCPRO (call7 (handler, Qcopy_file, file, newname, |
1898 | ok_if_already_exists, keep_time, preserve_uid_gid, | |
1899 | preserve_selinux_context)); | |
32f4334d | 1900 | |
b1d1b865 RS |
1901 | encoded_file = ENCODE_FILE (file); |
1902 | encoded_newname = ENCODE_FILE (newname); | |
1903 | ||
265a9e55 | 1904 | if (NILP (ok_if_already_exists) |
93c30b5f | 1905 | || INTEGERP (ok_if_already_exists)) |
2f868094 | 1906 | barf_or_query_if_file_exists (newname, "copy to it", |
b8b29dc9 | 1907 | INTEGERP (ok_if_already_exists), &out_st, 0); |
42a5b22f | 1908 | else if (stat (SSDATA (encoded_newname), &out_st) < 0) |
3ed15d97 | 1909 | out_st.st_mode = 0; |
570d7624 | 1910 | |
e8691c59 | 1911 | #ifdef WINDOWSNT |
d5db4077 | 1912 | if (!CopyFile (SDATA (encoded_file), |
efdc16c9 | 1913 | SDATA (encoded_newname), |
e8691c59 GM |
1914 | FALSE)) |
1915 | report_file_error ("Copying file", Fcons (file, Fcons (newname, Qnil))); | |
8b53dc06 JR |
1916 | /* CopyFile retains the timestamp by default. */ |
1917 | else if (NILP (keep_time)) | |
e8691c59 GM |
1918 | { |
1919 | EMACS_TIME now; | |
ad497129 JR |
1920 | DWORD attributes; |
1921 | char * filename; | |
1922 | ||
d5db4077 | 1923 | filename = SDATA (encoded_newname); |
ad497129 JR |
1924 | |
1925 | /* Ensure file is writable while its modified time is set. */ | |
1926 | attributes = GetFileAttributes (filename); | |
02cca86b | 1927 | SetFileAttributes (filename, attributes & ~FILE_ATTRIBUTE_READONLY); |
e9a9ae03 | 1928 | now = current_emacs_time (); |
d35af63c | 1929 | if (set_file_times (-1, filename, now, now)) |
ad497129 JR |
1930 | { |
1931 | /* Restore original attributes. */ | |
1932 | SetFileAttributes (filename, attributes); | |
24b1ddad KS |
1933 | xsignal2 (Qfile_date_error, |
1934 | build_string ("Cannot set file date"), newname); | |
ad497129 JR |
1935 | } |
1936 | /* Restore original attributes. */ | |
1937 | SetFileAttributes (filename, attributes); | |
e8691c59 GM |
1938 | } |
1939 | #else /* not WINDOWSNT */ | |
13336908 | 1940 | immediate_quit = 1; |
42a5b22f | 1941 | ifd = emacs_open (SSDATA (encoded_file), O_RDONLY, 0); |
13336908 RS |
1942 | immediate_quit = 0; |
1943 | ||
570d7624 | 1944 | if (ifd < 0) |
3b7f6e60 | 1945 | report_file_error ("Opening input file", Fcons (file, Qnil)); |
570d7624 | 1946 | |
b5148e85 RS |
1947 | record_unwind_protect (close_file_unwind, make_number (ifd)); |
1948 | ||
f73b0ada BF |
1949 | /* We can only copy regular files and symbolic links. Other files are not |
1950 | copyable by us. */ | |
1951 | input_file_statable_p = (fstat (ifd, &st) >= 0); | |
1952 | ||
574c05e2 KK |
1953 | #if HAVE_LIBSELINUX |
1954 | if (!NILP (preserve_selinux_context) && is_selinux_enabled ()) | |
1955 | { | |
1956 | conlength = fgetfilecon (ifd, &con); | |
1957 | if (conlength == -1) | |
1958 | report_file_error ("Doing fgetfilecon", Fcons (file, Qnil)); | |
1959 | } | |
1960 | #endif | |
1961 | ||
3ed15d97 RS |
1962 | if (out_st.st_mode != 0 |
1963 | && st.st_dev == out_st.st_dev && st.st_ino == out_st.st_ino) | |
1964 | { | |
1965 | errno = 0; | |
1966 | report_file_error ("Input and output files are the same", | |
3b7f6e60 | 1967 | Fcons (file, Fcons (newname, Qnil))); |
3ed15d97 | 1968 | } |
3ed15d97 | 1969 | |
f73b0ada BF |
1970 | if (input_file_statable_p) |
1971 | { | |
1972 | if (!(S_ISREG (st.st_mode)) && !(S_ISLNK (st.st_mode))) | |
1973 | { | |
1974 | #if defined (EISDIR) | |
1975 | /* Get a better looking error message. */ | |
1976 | errno = EISDIR; | |
1977 | #endif /* EISDIR */ | |
3b7f6e60 | 1978 | report_file_error ("Non-regular file", Fcons (file, Qnil)); |
f73b0ada BF |
1979 | } |
1980 | } | |
f73b0ada | 1981 | |
4c3c22f3 RS |
1982 | #ifdef MSDOS |
1983 | /* System's default file type was set to binary by _fmode in emacs.c. */ | |
c50f15d0 | 1984 | ofd = emacs_open (SDATA (encoded_newname), |
7fce7dfe | 1985 | O_WRONLY | O_TRUNC | O_CREAT |
795c20df | 1986 | | (NILP (ok_if_already_exists) ? O_EXCL : 0), |
c50f15d0 RS |
1987 | S_IREAD | S_IWRITE); |
1988 | #else /* not MSDOS */ | |
15e3a074 PE |
1989 | { |
1990 | int new_mask = 0666; | |
1991 | if (input_file_statable_p) | |
1992 | { | |
1993 | if (!NILP (preserve_uid_gid)) | |
1994 | new_mask = 0600; | |
1995 | new_mask &= st.st_mode; | |
1996 | } | |
1997 | ofd = emacs_open (SSDATA (encoded_newname), | |
1998 | (O_WRONLY | O_TRUNC | O_CREAT | |
1999 | | (NILP (ok_if_already_exists) ? O_EXCL : 0)), | |
2000 | new_mask); | |
2001 | } | |
4c3c22f3 | 2002 | #endif /* not MSDOS */ |
570d7624 | 2003 | if (ofd < 0) |
3ed15d97 | 2004 | report_file_error ("Opening output file", Fcons (newname, Qnil)); |
b5148e85 RS |
2005 | |
2006 | record_unwind_protect (close_file_unwind, make_number (ofd)); | |
570d7624 | 2007 | |
b5148e85 RS |
2008 | immediate_quit = 1; |
2009 | QUIT; | |
68c45bf0 PE |
2010 | while ((n = emacs_read (ifd, buf, sizeof buf)) > 0) |
2011 | if (emacs_write (ofd, buf, n) != n) | |
3ed15d97 | 2012 | report_file_error ("I/O error", Fcons (newname, Qnil)); |
b5148e85 | 2013 | immediate_quit = 0; |
570d7624 | 2014 | |
b016179b EZ |
2015 | #ifndef MSDOS |
2016 | /* Preserve the original file modes, and if requested, also its | |
2017 | owner and group. */ | |
586702ce RS |
2018 | if (input_file_statable_p) |
2019 | { | |
b59b67c5 | 2020 | int mode_mask = 07777; |
a8031457 | 2021 | if (!NILP (preserve_uid_gid)) |
b59b67c5 PE |
2022 | { |
2023 | /* Attempt to change owner and group. If that doesn't work | |
2024 | attempt to change just the group, as that is sometimes allowed. | |
2025 | Adjust the mode mask to eliminate setuid or setgid bits | |
2026 | that are inappropriate if the owner and group are wrong. */ | |
2027 | if (fchown (ofd, st.st_uid, st.st_gid) != 0) | |
2028 | { | |
2029 | mode_mask &= ~06000; | |
2030 | if (fchown (ofd, -1, st.st_gid) == 0) | |
2031 | mode_mask |= 02000; | |
2032 | } | |
2033 | } | |
2034 | if (fchmod (ofd, st.st_mode & mode_mask) != 0) | |
81e56e61 | 2035 | report_file_error ("Doing chmod", Fcons (newname, Qnil)); |
586702ce | 2036 | } |
b016179b | 2037 | #endif /* not MSDOS */ |
586702ce | 2038 | |
574c05e2 KK |
2039 | #if HAVE_LIBSELINUX |
2040 | if (conlength > 0) | |
2041 | { | |
24c51a09 | 2042 | /* Set the modified context back to the file. */ |
574c05e2 | 2043 | fail = fsetfilecon (ofd, con); |
24c51a09 GM |
2044 | /* See http://debbugs.gnu.org/11245 for ENOTSUP. */ |
2045 | if (fail && errno != ENOTSUP) | |
574c05e2 KK |
2046 | report_file_error ("Doing fsetfilecon", Fcons (newname, Qnil)); |
2047 | ||
2048 | freecon (con); | |
2049 | } | |
2050 | #endif | |
2051 | ||
f73b0ada | 2052 | if (input_file_statable_p) |
570d7624 | 2053 | { |
8ca6602c | 2054 | if (!NILP (keep_time)) |
570d7624 | 2055 | { |
d35af63c PE |
2056 | EMACS_TIME atime = get_stat_atime (&st); |
2057 | EMACS_TIME mtime = get_stat_mtime (&st); | |
2058 | if (set_file_times (ofd, SSDATA (encoded_newname), atime, mtime)) | |
24b1ddad KS |
2059 | xsignal2 (Qfile_date_error, |
2060 | build_string ("Cannot set file date"), newname); | |
570d7624 | 2061 | } |
570d7624 JB |
2062 | } |
2063 | ||
d35af63c PE |
2064 | if (emacs_close (ofd) < 0) |
2065 | report_file_error ("I/O error", Fcons (newname, Qnil)); | |
2066 | ||
68c45bf0 | 2067 | emacs_close (ifd); |
b016179b | 2068 | |
ed68db4d | 2069 | #ifdef MSDOS |
b016179b EZ |
2070 | if (input_file_statable_p) |
2071 | { | |
2072 | /* In DJGPP v2.0 and later, fstat usually returns true file mode bits, | |
2073 | and if it can't, it tells so. Otherwise, under MSDOS we usually | |
2074 | get only the READ bit, which will make the copied file read-only, | |
2075 | so it's better not to chmod at all. */ | |
2076 | if ((_djstat_flags & _STFAIL_WRITEBIT) == 0) | |
2077 | chmod (SDATA (encoded_newname), st.st_mode & 07777); | |
2078 | } | |
ed68db4d | 2079 | #endif /* MSDOS */ |
b016179b | 2080 | #endif /* not WINDOWSNT */ |
5acac34e | 2081 | |
b5148e85 RS |
2082 | /* Discard the unwind protects. */ |
2083 | specpdl_ptr = specpdl + count; | |
2084 | ||
570d7624 JB |
2085 | UNGCPRO; |
2086 | return Qnil; | |
2087 | } | |
385b6cc7 | 2088 | \f |
9bbe01fb | 2089 | DEFUN ("make-directory-internal", Fmake_directory_internal, |
353cfc19 | 2090 | Smake_directory_internal, 1, 1, 0, |
8c1a1077 | 2091 | doc: /* Create a new directory named DIRECTORY. */) |
5842a27b | 2092 | (Lisp_Object directory) |
570d7624 | 2093 | { |
5976c3fe | 2094 | const char *dir; |
32f4334d | 2095 | Lisp_Object handler; |
b1d1b865 | 2096 | Lisp_Object encoded_dir; |
570d7624 | 2097 | |
b7826503 | 2098 | CHECK_STRING (directory); |
3b7f6e60 | 2099 | directory = Fexpand_file_name (directory, Qnil); |
32f4334d | 2100 | |
3b7f6e60 | 2101 | handler = Ffind_file_name_handler (directory, Qmake_directory_internal); |
32f4334d | 2102 | if (!NILP (handler)) |
3b7f6e60 | 2103 | return call2 (handler, Qmake_directory_internal, directory); |
9bbe01fb | 2104 | |
b1d1b865 RS |
2105 | encoded_dir = ENCODE_FILE (directory); |
2106 | ||
5976c3fe | 2107 | dir = SSDATA (encoded_dir); |
570d7624 | 2108 | |
5e570b75 RS |
2109 | #ifdef WINDOWSNT |
2110 | if (mkdir (dir) != 0) | |
2111 | #else | |
09450bae | 2112 | if (mkdir (dir, 0777 & ~auto_saving_dir_umask) != 0) |
5e570b75 | 2113 | #endif |
a9f2aeae | 2114 | report_file_error ("Creating directory", list1 (directory)); |
570d7624 | 2115 | |
32f4334d | 2116 | return Qnil; |
570d7624 JB |
2117 | } |
2118 | ||
9d8f3bd9 MA |
2119 | DEFUN ("delete-directory-internal", Fdelete_directory_internal, |
2120 | Sdelete_directory_internal, 1, 1, 0, | |
efdc16c9 | 2121 | doc: /* Delete the directory named DIRECTORY. Does not follow symlinks. */) |
5842a27b | 2122 | (Lisp_Object directory) |
570d7624 | 2123 | { |
5976c3fe | 2124 | const char *dir; |
b1d1b865 | 2125 | Lisp_Object encoded_dir; |
570d7624 | 2126 | |
b7826503 | 2127 | CHECK_STRING (directory); |
3b7f6e60 | 2128 | directory = Fdirectory_file_name (Fexpand_file_name (directory, Qnil)); |
b1d1b865 | 2129 | encoded_dir = ENCODE_FILE (directory); |
5976c3fe | 2130 | dir = SSDATA (encoded_dir); |
b1d1b865 | 2131 | |
570d7624 | 2132 | if (rmdir (dir) != 0) |
a9f2aeae | 2133 | report_file_error ("Removing directory", list1 (directory)); |
570d7624 JB |
2134 | |
2135 | return Qnil; | |
2136 | } | |
2137 | ||
2e2bbddb | 2138 | DEFUN ("delete-file", Fdelete_file, Sdelete_file, 1, 2, |
f1a5d776 CY |
2139 | "(list (read-file-name \ |
2140 | (if (and delete-by-moving-to-trash (null current-prefix-arg)) \ | |
2141 | \"Move file to trash: \" \"Delete file: \") \ | |
2142 | nil default-directory (confirm-nonexistent-file-or-buffer)) \ | |
2143 | (null current-prefix-arg))", | |
efdc16c9 | 2144 | doc: /* Delete file named FILENAME. If it is a symlink, remove the symlink. |
53967e09 | 2145 | If file has multiple names, it continues to exist with the other names. |
f1a5d776 CY |
2146 | TRASH non-nil means to trash the file instead of deleting, provided |
2147 | `delete-by-moving-to-trash' is non-nil. | |
53967e09 | 2148 | |
f1a5d776 CY |
2149 | When called interactively, TRASH is t if no prefix argument is given. |
2150 | With a prefix argument, TRASH is nil. */) | |
5842a27b | 2151 | (Lisp_Object filename, Lisp_Object trash) |
570d7624 | 2152 | { |
32f4334d | 2153 | Lisp_Object handler; |
b1d1b865 | 2154 | Lisp_Object encoded_file; |
efdc16c9 | 2155 | struct gcpro gcpro1; |
b1d1b865 | 2156 | |
efdc16c9 | 2157 | GCPRO1 (filename); |
b4bd27c5 RS |
2158 | if (!NILP (Ffile_directory_p (filename)) |
2159 | && NILP (Ffile_symlink_p (filename))) | |
24b1ddad KS |
2160 | xsignal2 (Qfile_error, |
2161 | build_string ("Removing old name: is a directory"), | |
2162 | filename); | |
efdc16c9 | 2163 | UNGCPRO; |
570d7624 | 2164 | filename = Fexpand_file_name (filename, Qnil); |
32f4334d | 2165 | |
49307295 | 2166 | handler = Ffind_file_name_handler (filename, Qdelete_file); |
32f4334d | 2167 | if (!NILP (handler)) |
f5783df3 | 2168 | return call3 (handler, Qdelete_file, filename, trash); |
32f4334d | 2169 | |
f1a5d776 | 2170 | if (delete_by_moving_to_trash && !NILP (trash)) |
6cf29fe8 JR |
2171 | return call1 (Qmove_file_to_trash, filename); |
2172 | ||
b1d1b865 RS |
2173 | encoded_file = ENCODE_FILE (filename); |
2174 | ||
42a5b22f | 2175 | if (0 > unlink (SSDATA (encoded_file))) |
a9f2aeae | 2176 | report_file_error ("Removing old name", list1 (filename)); |
8a9b0da9 | 2177 | return Qnil; |
570d7624 JB |
2178 | } |
2179 | ||
385b6cc7 | 2180 | static Lisp_Object |
971de7fb | 2181 | internal_delete_file_1 (Lisp_Object ignore) |
385b6cc7 RS |
2182 | { |
2183 | return Qt; | |
2184 | } | |
2185 | ||
53967e09 | 2186 | /* Delete file FILENAME, returning 1 if successful and 0 if failed. |
f1a5d776 | 2187 | This ignores `delete-by-moving-to-trash'. */ |
385b6cc7 RS |
2188 | |
2189 | int | |
f1a5d776 | 2190 | internal_delete_file (Lisp_Object filename) |
385b6cc7 | 2191 | { |
a3911e8c | 2192 | Lisp_Object tem; |
53967e09 | 2193 | |
f1a5d776 | 2194 | tem = internal_condition_case_2 (Fdelete_file, filename, Qnil, |
a3911e8c KR |
2195 | Qt, internal_delete_file_1); |
2196 | return NILP (tem); | |
385b6cc7 RS |
2197 | } |
2198 | \f | |
570d7624 | 2199 | DEFUN ("rename-file", Frename_file, Srename_file, 2, 3, |
7c0f6118 | 2200 | "fRename file: \nGRename %s to file: \np", |
a4e03fe5 | 2201 | doc: /* Rename FILE as NEWNAME. Both args must be strings. |
8c1a1077 PJ |
2202 | If file has names other than FILE, it continues to have those names. |
2203 | Signals a `file-already-exists' error if a file NEWNAME already exists | |
2204 | unless optional third argument OK-IF-ALREADY-EXISTS is non-nil. | |
2205 | A number as third arg means request confirmation if NEWNAME already exists. | |
2206 | This is what happens in interactive use with M-x. */) | |
5842a27b | 2207 | (Lisp_Object file, Lisp_Object newname, Lisp_Object ok_if_already_exists) |
570d7624 | 2208 | { |
32f4334d | 2209 | Lisp_Object handler; |
f72b5416 JD |
2210 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4, gcpro5; |
2211 | Lisp_Object encoded_file, encoded_newname, symlink_target; | |
570d7624 | 2212 | |
f72b5416 JD |
2213 | symlink_target = encoded_file = encoded_newname = Qnil; |
2214 | GCPRO5 (file, newname, encoded_file, encoded_newname, symlink_target); | |
b7826503 PJ |
2215 | CHECK_STRING (file); |
2216 | CHECK_STRING (newname); | |
3b7f6e60 | 2217 | file = Fexpand_file_name (file, Qnil); |
1ffc5c90 | 2218 | |
f83caf70 EZ |
2219 | if ((!NILP (Ffile_directory_p (newname))) |
2220 | #ifdef DOS_NT | |
2221 | /* If the file names are identical but for the case, | |
2222 | don't attempt to move directory to itself. */ | |
2223 | && (NILP (Fstring_equal (Fdowncase (file), Fdowncase (newname)))) | |
2224 | #endif | |
2225 | ) | |
8719abec CY |
2226 | { |
2227 | Lisp_Object fname = NILP (Ffile_directory_p (file)) | |
2228 | ? file : Fdirectory_file_name (file); | |
2229 | newname = Fexpand_file_name (Ffile_name_nondirectory (fname), newname); | |
2230 | } | |
1ffc5c90 RS |
2231 | else |
2232 | newname = Fexpand_file_name (newname, Qnil); | |
32f4334d RS |
2233 | |
2234 | /* If the file name has special constructs in it, | |
2235 | call the corresponding file handler. */ | |
3b7f6e60 | 2236 | handler = Ffind_file_name_handler (file, Qrename_file); |
51cf6d37 | 2237 | if (NILP (handler)) |
49307295 | 2238 | handler = Ffind_file_name_handler (newname, Qrename_file); |
32f4334d | 2239 | if (!NILP (handler)) |
36712b0a | 2240 | RETURN_UNGCPRO (call4 (handler, Qrename_file, |
3b7f6e60 | 2241 | file, newname, ok_if_already_exists)); |
32f4334d | 2242 | |
b1d1b865 RS |
2243 | encoded_file = ENCODE_FILE (file); |
2244 | encoded_newname = ENCODE_FILE (newname); | |
2245 | ||
bc77278f EZ |
2246 | #ifdef DOS_NT |
2247 | /* If the file names are identical but for the case, don't ask for | |
2248 | confirmation: they simply want to change the letter-case of the | |
2249 | file name. */ | |
2250 | if (NILP (Fstring_equal (Fdowncase (file), Fdowncase (newname)))) | |
2251 | #endif | |
265a9e55 | 2252 | if (NILP (ok_if_already_exists) |
93c30b5f | 2253 | || INTEGERP (ok_if_already_exists)) |
2f868094 | 2254 | barf_or_query_if_file_exists (newname, "rename to it", |
b8b29dc9 | 2255 | INTEGERP (ok_if_already_exists), 0, 0); |
42a5b22f | 2256 | if (0 > rename (SSDATA (encoded_file), SSDATA (encoded_newname))) |
570d7624 JB |
2257 | { |
2258 | if (errno == EXDEV) | |
2259 | { | |
d311d28c | 2260 | ptrdiff_t count; |
f72b5416 | 2261 | symlink_target = Ffile_symlink_p (file); |
440c7d00 JD |
2262 | if (! NILP (symlink_target)) |
2263 | Fmake_symbolic_link (symlink_target, newname, | |
f59abab9 | 2264 | NILP (ok_if_already_exists) ? Qnil : Qt); |
ae0d7250 | 2265 | else if (!NILP (Ffile_directory_p (file))) |
8719abec CY |
2266 | call4 (Qcopy_directory, file, newname, Qt, Qnil); |
2267 | else | |
2268 | /* We have already prompted if it was an integer, so don't | |
2269 | have copy-file prompt again. */ | |
586702ce | 2270 | Fcopy_file (file, newname, |
586702ce | 2271 | NILP (ok_if_already_exists) ? Qnil : Qt, |
574c05e2 | 2272 | Qt, Qt, Qt); |
d550c425 | 2273 | |
6bddfc97 | 2274 | count = SPECPDL_INDEX (); |
d2b66acf | 2275 | specbind (Qdelete_by_moving_to_trash, Qnil); |
8fab2362 | 2276 | |
ae0d7250 | 2277 | if (!NILP (Ffile_directory_p (file)) && NILP (symlink_target)) |
8719abec CY |
2278 | call2 (Qdelete_directory, file, Qt); |
2279 | else | |
f1a5d776 | 2280 | Fdelete_file (file, Qnil); |
6bddfc97 | 2281 | unbind_to (count, Qnil); |
570d7624 JB |
2282 | } |
2283 | else | |
a9f2aeae | 2284 | report_file_error ("Renaming", list2 (file, newname)); |
570d7624 JB |
2285 | } |
2286 | UNGCPRO; | |
2287 | return Qnil; | |
2288 | } | |
2289 | ||
2290 | DEFUN ("add-name-to-file", Fadd_name_to_file, Sadd_name_to_file, 2, 3, | |
7c0f6118 | 2291 | "fAdd name to file: \nGName to add to %s: \np", |
a4e03fe5 | 2292 | doc: /* Give FILE additional name NEWNAME. Both args must be strings. |
8c1a1077 PJ |
2293 | Signals a `file-already-exists' error if a file NEWNAME already exists |
2294 | unless optional third argument OK-IF-ALREADY-EXISTS is non-nil. | |
2295 | A number as third arg means request confirmation if NEWNAME already exists. | |
2296 | This is what happens in interactive use with M-x. */) | |
5842a27b | 2297 | (Lisp_Object file, Lisp_Object newname, Lisp_Object ok_if_already_exists) |
570d7624 | 2298 | { |
32f4334d | 2299 | Lisp_Object handler; |
b1d1b865 RS |
2300 | Lisp_Object encoded_file, encoded_newname; |
2301 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; | |
570d7624 | 2302 | |
b1d1b865 RS |
2303 | GCPRO4 (file, newname, encoded_file, encoded_newname); |
2304 | encoded_file = encoded_newname = Qnil; | |
b7826503 PJ |
2305 | CHECK_STRING (file); |
2306 | CHECK_STRING (newname); | |
3b7f6e60 | 2307 | file = Fexpand_file_name (file, Qnil); |
1ffc5c90 RS |
2308 | |
2309 | if (!NILP (Ffile_directory_p (newname))) | |
2310 | newname = Fexpand_file_name (Ffile_name_nondirectory (file), newname); | |
2311 | else | |
2312 | newname = Fexpand_file_name (newname, Qnil); | |
32f4334d RS |
2313 | |
2314 | /* If the file name has special constructs in it, | |
2315 | call the corresponding file handler. */ | |
3b7f6e60 | 2316 | handler = Ffind_file_name_handler (file, Qadd_name_to_file); |
32f4334d | 2317 | if (!NILP (handler)) |
3b7f6e60 | 2318 | RETURN_UNGCPRO (call4 (handler, Qadd_name_to_file, file, |
36712b0a | 2319 | newname, ok_if_already_exists)); |
32f4334d | 2320 | |
adc6741c RS |
2321 | /* If the new name has special constructs in it, |
2322 | call the corresponding file handler. */ | |
2323 | handler = Ffind_file_name_handler (newname, Qadd_name_to_file); | |
2324 | if (!NILP (handler)) | |
3b7f6e60 | 2325 | RETURN_UNGCPRO (call4 (handler, Qadd_name_to_file, file, |
adc6741c RS |
2326 | newname, ok_if_already_exists)); |
2327 | ||
b1d1b865 RS |
2328 | encoded_file = ENCODE_FILE (file); |
2329 | encoded_newname = ENCODE_FILE (newname); | |
2330 | ||
265a9e55 | 2331 | if (NILP (ok_if_already_exists) |
93c30b5f | 2332 | || INTEGERP (ok_if_already_exists)) |
2f868094 | 2333 | barf_or_query_if_file_exists (newname, "make it a new name", |
b8b29dc9 | 2334 | INTEGERP (ok_if_already_exists), 0, 0); |
5e570b75 | 2335 | |
42a5b22f PE |
2336 | unlink (SSDATA (newname)); |
2337 | if (0 > link (SSDATA (encoded_file), SSDATA (encoded_newname))) | |
a9f2aeae | 2338 | report_file_error ("Adding new name", list2 (file, newname)); |
570d7624 JB |
2339 | |
2340 | UNGCPRO; | |
2341 | return Qnil; | |
2342 | } | |
2343 | ||
570d7624 | 2344 | DEFUN ("make-symbolic-link", Fmake_symbolic_link, Smake_symbolic_link, 2, 3, |
7c0f6118 | 2345 | "FMake symbolic link to file: \nGMake symbolic link to file %s: \np", |
68780e2a RS |
2346 | doc: /* Make a symbolic link to FILENAME, named LINKNAME. |
2347 | Both args must be strings. | |
8c1a1077 PJ |
2348 | Signals a `file-already-exists' error if a file LINKNAME already exists |
2349 | unless optional third argument OK-IF-ALREADY-EXISTS is non-nil. | |
2350 | A number as third arg means request confirmation if LINKNAME already exists. | |
2351 | This happens for interactive use with M-x. */) | |
5842a27b | 2352 | (Lisp_Object filename, Lisp_Object linkname, Lisp_Object ok_if_already_exists) |
570d7624 | 2353 | { |
32f4334d | 2354 | Lisp_Object handler; |
b1d1b865 RS |
2355 | Lisp_Object encoded_filename, encoded_linkname; |
2356 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; | |
570d7624 | 2357 | |
b1d1b865 RS |
2358 | GCPRO4 (filename, linkname, encoded_filename, encoded_linkname); |
2359 | encoded_filename = encoded_linkname = Qnil; | |
b7826503 PJ |
2360 | CHECK_STRING (filename); |
2361 | CHECK_STRING (linkname); | |
d9bc1c99 RS |
2362 | /* If the link target has a ~, we must expand it to get |
2363 | a truly valid file name. Otherwise, do not expand; | |
2364 | we want to permit links to relative file names. */ | |
d5db4077 | 2365 | if (SREF (filename, 0) == '~') |
d9bc1c99 | 2366 | filename = Fexpand_file_name (filename, Qnil); |
1ffc5c90 RS |
2367 | |
2368 | if (!NILP (Ffile_directory_p (linkname))) | |
dac24db4 | 2369 | linkname = Fexpand_file_name (Ffile_name_nondirectory (filename), linkname); |
1ffc5c90 RS |
2370 | else |
2371 | linkname = Fexpand_file_name (linkname, Qnil); | |
32f4334d RS |
2372 | |
2373 | /* If the file name has special constructs in it, | |
2374 | call the corresponding file handler. */ | |
49307295 | 2375 | handler = Ffind_file_name_handler (filename, Qmake_symbolic_link); |
32f4334d | 2376 | if (!NILP (handler)) |
36712b0a KH |
2377 | RETURN_UNGCPRO (call4 (handler, Qmake_symbolic_link, filename, |
2378 | linkname, ok_if_already_exists)); | |
32f4334d | 2379 | |
adc6741c RS |
2380 | /* If the new link name has special constructs in it, |
2381 | call the corresponding file handler. */ | |
2382 | handler = Ffind_file_name_handler (linkname, Qmake_symbolic_link); | |
2383 | if (!NILP (handler)) | |
2384 | RETURN_UNGCPRO (call4 (handler, Qmake_symbolic_link, filename, | |
2385 | linkname, ok_if_already_exists)); | |
2386 | ||
b1d1b865 RS |
2387 | encoded_filename = ENCODE_FILE (filename); |
2388 | encoded_linkname = ENCODE_FILE (linkname); | |
2389 | ||
265a9e55 | 2390 | if (NILP (ok_if_already_exists) |
93c30b5f | 2391 | || INTEGERP (ok_if_already_exists)) |
2f868094 | 2392 | barf_or_query_if_file_exists (linkname, "make it a link", |
b8b29dc9 | 2393 | INTEGERP (ok_if_already_exists), 0, 0); |
42a5b22f PE |
2394 | if (0 > symlink (SSDATA (encoded_filename), |
2395 | SSDATA (encoded_linkname))) | |
570d7624 JB |
2396 | { |
2397 | /* If we didn't complain already, silently delete existing file. */ | |
2398 | if (errno == EEXIST) | |
2399 | { | |
42a5b22f PE |
2400 | unlink (SSDATA (encoded_linkname)); |
2401 | if (0 <= symlink (SSDATA (encoded_filename), | |
2402 | SSDATA (encoded_linkname))) | |
1a04498e KH |
2403 | { |
2404 | UNGCPRO; | |
2405 | return Qnil; | |
2406 | } | |
570d7624 | 2407 | } |
d9d0d182 PE |
2408 | if (errno == ENOSYS) |
2409 | { | |
2410 | UNGCPRO; | |
2411 | xsignal1 (Qfile_error, | |
2412 | build_string ("Symbolic links are not supported")); | |
2413 | } | |
570d7624 | 2414 | |
a9f2aeae | 2415 | report_file_error ("Making symbolic link", list2 (filename, linkname)); |
570d7624 JB |
2416 | } |
2417 | UNGCPRO; | |
2418 | return Qnil; | |
e89b536d | 2419 | } |
570d7624 | 2420 | |
570d7624 | 2421 | \f |
a7ca3326 | 2422 | DEFUN ("file-name-absolute-p", Ffile_name_absolute_p, Sfile_name_absolute_p, |
570d7624 | 2423 | 1, 1, 0, |
8c1a1077 PJ |
2424 | doc: /* Return t if file FILENAME specifies an absolute file name. |
2425 | On Unix, this is a name starting with a `/' or a `~'. */) | |
5842a27b | 2426 | (Lisp_Object filename) |
570d7624 | 2427 | { |
b7826503 | 2428 | CHECK_STRING (filename); |
5976c3fe | 2429 | return file_name_absolute_p (SSDATA (filename)) ? Qt : Qnil; |
570d7624 | 2430 | } |
3beeedfe RS |
2431 | \f |
2432 | /* Return nonzero if file FILENAME exists and can be executed. */ | |
2433 | ||
2434 | static int | |
971de7fb | 2435 | check_executable (char *filename) |
3beeedfe | 2436 | { |
3be3c08e | 2437 | #ifdef DOS_NT |
3be3c08e RS |
2438 | struct stat st; |
2439 | if (stat (filename, &st) < 0) | |
2440 | return 0; | |
199607e4 | 2441 | return ((st.st_mode & S_IEXEC) != 0); |
3be3c08e | 2442 | #else /* not DOS_NT */ |
de0be7dd RS |
2443 | #ifdef HAVE_EUIDACCESS |
2444 | return (euidaccess (filename, 1) >= 0); | |
3beeedfe RS |
2445 | #else |
2446 | /* Access isn't quite right because it uses the real uid | |
2447 | and we really want to test with the effective uid. | |
2448 | But Unix doesn't give us a right way to do it. */ | |
2449 | return (access (filename, 1) >= 0); | |
2450 | #endif | |
3be3c08e | 2451 | #endif /* not DOS_NT */ |
3beeedfe RS |
2452 | } |
2453 | ||
2454 | /* Return nonzero if file FILENAME exists and can be written. */ | |
2455 | ||
2456 | static int | |
8ea90aa3 | 2457 | check_writable (const char *filename) |
3beeedfe | 2458 | { |
3be3c08e RS |
2459 | #ifdef MSDOS |
2460 | struct stat st; | |
2461 | if (stat (filename, &st) < 0) | |
2462 | return 0; | |
f68c809d | 2463 | return (st.st_mode & S_IWRITE || S_ISDIR (st.st_mode)); |
3be3c08e | 2464 | #else /* not MSDOS */ |
41f3fb38 | 2465 | #ifdef HAVE_EUIDACCESS |
e1b01a3a KB |
2466 | int res = (euidaccess (filename, 2) >= 0); |
2467 | #ifdef CYGWIN | |
2468 | /* euidaccess may have returned failure because Cygwin couldn't | |
2469 | determine the file's UID or GID; if so, we return success. */ | |
2470 | if (!res) | |
2471 | { | |
2472 | struct stat st; | |
2473 | if (stat (filename, &st) < 0) | |
2474 | return 0; | |
2475 | res = (st.st_uid == -1 || st.st_gid == -1); | |
2476 | } | |
2477 | #endif /* CYGWIN */ | |
2478 | return res; | |
2479 | #else /* not HAVE_EUIDACCESS */ | |
3beeedfe RS |
2480 | /* Access isn't quite right because it uses the real uid |
2481 | and we really want to test with the effective uid. | |
2482 | But Unix doesn't give us a right way to do it. | |
2483 | Opening with O_WRONLY could work for an ordinary file, | |
2484 | but would lose for directories. */ | |
2485 | return (access (filename, 2) >= 0); | |
e1b01a3a | 2486 | #endif /* not HAVE_EUIDACCESS */ |
3be3c08e | 2487 | #endif /* not MSDOS */ |
3beeedfe | 2488 | } |
570d7624 | 2489 | |
a7ca3326 | 2490 | DEFUN ("file-exists-p", Ffile_exists_p, Sfile_exists_p, 1, 1, 0, |
68780e2a RS |
2491 | doc: /* Return t if file FILENAME exists (whether or not you can read it.) |
2492 | See also `file-readable-p' and `file-attributes'. | |
2493 | This returns nil for a symlink to a nonexistent file. | |
2494 | Use `file-symlink-p' to test for such links. */) | |
5842a27b | 2495 | (Lisp_Object filename) |
570d7624 | 2496 | { |
199607e4 | 2497 | Lisp_Object absname; |
32f4334d | 2498 | Lisp_Object handler; |
4018b5ef | 2499 | struct stat statbuf; |
570d7624 | 2500 | |
b7826503 | 2501 | CHECK_STRING (filename); |
199607e4 | 2502 | absname = Fexpand_file_name (filename, Qnil); |
32f4334d RS |
2503 | |
2504 | /* If the file name has special constructs in it, | |
2505 | call the corresponding file handler. */ | |
199607e4 | 2506 | handler = Ffind_file_name_handler (absname, Qfile_exists_p); |
32f4334d | 2507 | if (!NILP (handler)) |
199607e4 | 2508 | return call2 (handler, Qfile_exists_p, absname); |
32f4334d | 2509 | |
b1d1b865 RS |
2510 | absname = ENCODE_FILE (absname); |
2511 | ||
42a5b22f | 2512 | return (stat (SSDATA (absname), &statbuf) >= 0) ? Qt : Qnil; |
570d7624 JB |
2513 | } |
2514 | ||
2515 | DEFUN ("file-executable-p", Ffile_executable_p, Sfile_executable_p, 1, 1, 0, | |
8c1a1077 PJ |
2516 | doc: /* Return t if FILENAME can be executed by you. |
2517 | For a directory, this means you can access files in that directory. */) | |
5842a27b | 2518 | (Lisp_Object filename) |
570d7624 | 2519 | { |
199607e4 | 2520 | Lisp_Object absname; |
32f4334d | 2521 | Lisp_Object handler; |
570d7624 | 2522 | |
b7826503 | 2523 | CHECK_STRING (filename); |
199607e4 | 2524 | absname = Fexpand_file_name (filename, Qnil); |
32f4334d RS |
2525 | |
2526 | /* If the file name has special constructs in it, | |
2527 | call the corresponding file handler. */ | |
199607e4 | 2528 | handler = Ffind_file_name_handler (absname, Qfile_executable_p); |
32f4334d | 2529 | if (!NILP (handler)) |
199607e4 | 2530 | return call2 (handler, Qfile_executable_p, absname); |
32f4334d | 2531 | |
b1d1b865 RS |
2532 | absname = ENCODE_FILE (absname); |
2533 | ||
42a5b22f | 2534 | return (check_executable (SSDATA (absname)) ? Qt : Qnil); |
570d7624 JB |
2535 | } |
2536 | ||
a7ca3326 | 2537 | DEFUN ("file-readable-p", Ffile_readable_p, Sfile_readable_p, 1, 1, 0, |
8c1a1077 PJ |
2538 | doc: /* Return t if file FILENAME exists and you can read it. |
2539 | See also `file-exists-p' and `file-attributes'. */) | |
5842a27b | 2540 | (Lisp_Object filename) |
570d7624 | 2541 | { |
199607e4 | 2542 | Lisp_Object absname; |
32f4334d | 2543 | Lisp_Object handler; |
4018b5ef | 2544 | int desc; |
bb369dc6 RS |
2545 | int flags; |
2546 | struct stat statbuf; | |
570d7624 | 2547 | |
b7826503 | 2548 | CHECK_STRING (filename); |
199607e4 | 2549 | absname = Fexpand_file_name (filename, Qnil); |
32f4334d RS |
2550 | |
2551 | /* If the file name has special constructs in it, | |
2552 | call the corresponding file handler. */ | |
199607e4 | 2553 | handler = Ffind_file_name_handler (absname, Qfile_readable_p); |
32f4334d | 2554 | if (!NILP (handler)) |
199607e4 | 2555 | return call2 (handler, Qfile_readable_p, absname); |
32f4334d | 2556 | |
b1d1b865 RS |
2557 | absname = ENCODE_FILE (absname); |
2558 | ||
5e617bc2 | 2559 | #if defined (DOS_NT) || defined (macintosh) |
fb4c6c96 AC |
2560 | /* Under MS-DOS, Windows, and Macintosh, open does not work for |
2561 | directories. */ | |
d5db4077 | 2562 | if (access (SDATA (absname), 0) == 0) |
a8a7d065 RS |
2563 | return Qt; |
2564 | return Qnil; | |
fb4c6c96 | 2565 | #else /* not DOS_NT and not macintosh */ |
bb369dc6 | 2566 | flags = O_RDONLY; |
ae0d7250 | 2567 | #ifdef O_NONBLOCK |
bb369dc6 RS |
2568 | /* Opening a fifo without O_NONBLOCK can wait. |
2569 | We don't want to wait. But we don't want to mess wth O_NONBLOCK | |
2570 | except in the case of a fifo, on a system which handles it. */ | |
42a5b22f | 2571 | desc = stat (SSDATA (absname), &statbuf); |
bb369dc6 RS |
2572 | if (desc < 0) |
2573 | return Qnil; | |
2574 | if (S_ISFIFO (statbuf.st_mode)) | |
2575 | flags |= O_NONBLOCK; | |
2576 | #endif | |
42a5b22f | 2577 | desc = emacs_open (SSDATA (absname), flags, 0); |
4018b5ef RS |
2578 | if (desc < 0) |
2579 | return Qnil; | |
68c45bf0 | 2580 | emacs_close (desc); |
4018b5ef | 2581 | return Qt; |
fb4c6c96 | 2582 | #endif /* not DOS_NT and not macintosh */ |
570d7624 JB |
2583 | } |
2584 | ||
f793dc6c RS |
2585 | /* Having this before file-symlink-p mysteriously caused it to be forgotten |
2586 | on the RT/PC. */ | |
2587 | DEFUN ("file-writable-p", Ffile_writable_p, Sfile_writable_p, 1, 1, 0, | |
8c1a1077 | 2588 | doc: /* Return t if file FILENAME can be written or created by you. */) |
5842a27b | 2589 | (Lisp_Object filename) |
f793dc6c | 2590 | { |
b1d1b865 | 2591 | Lisp_Object absname, dir, encoded; |
f793dc6c RS |
2592 | Lisp_Object handler; |
2593 | struct stat statbuf; | |
2594 | ||
b7826503 | 2595 | CHECK_STRING (filename); |
199607e4 | 2596 | absname = Fexpand_file_name (filename, Qnil); |
f793dc6c RS |
2597 | |
2598 | /* If the file name has special constructs in it, | |
2599 | call the corresponding file handler. */ | |
199607e4 | 2600 | handler = Ffind_file_name_handler (absname, Qfile_writable_p); |
f793dc6c | 2601 | if (!NILP (handler)) |
199607e4 | 2602 | return call2 (handler, Qfile_writable_p, absname); |
f793dc6c | 2603 | |
b1d1b865 | 2604 | encoded = ENCODE_FILE (absname); |
42a5b22f PE |
2605 | if (stat (SSDATA (encoded), &statbuf) >= 0) |
2606 | return (check_writable (SSDATA (encoded)) | |
f793dc6c | 2607 | ? Qt : Qnil); |
b1d1b865 | 2608 | |
199607e4 | 2609 | dir = Ffile_name_directory (absname); |
f793dc6c RS |
2610 | #ifdef MSDOS |
2611 | if (!NILP (dir)) | |
2612 | dir = Fdirectory_file_name (dir); | |
2613 | #endif /* MSDOS */ | |
b1d1b865 RS |
2614 | |
2615 | dir = ENCODE_FILE (dir); | |
e3e8a75a GM |
2616 | #ifdef WINDOWSNT |
2617 | /* The read-only attribute of the parent directory doesn't affect | |
2618 | whether a file or directory can be created within it. Some day we | |
2619 | should check ACLs though, which do affect this. */ | |
d5db4077 | 2620 | if (stat (SDATA (dir), &statbuf) < 0) |
e3e8a75a | 2621 | return Qnil; |
f68c809d | 2622 | return S_ISDIR (statbuf.st_mode) ? Qt : Qnil; |
e3e8a75a | 2623 | #else |
51b59d79 | 2624 | return (check_writable (!NILP (dir) ? SSDATA (dir) : "") |
f793dc6c | 2625 | ? Qt : Qnil); |
e3e8a75a | 2626 | #endif |
f793dc6c RS |
2627 | } |
2628 | \f | |
1f8653eb | 2629 | DEFUN ("access-file", Faccess_file, Saccess_file, 2, 2, 0, |
8c1a1077 PJ |
2630 | doc: /* Access file FILENAME, and get an error if that does not work. |
2631 | The second argument STRING is used in the error message. | |
a4e03fe5 | 2632 | If there is no error, returns nil. */) |
5842a27b | 2633 | (Lisp_Object filename, Lisp_Object string) |
1f8653eb | 2634 | { |
49475635 | 2635 | Lisp_Object handler, encoded_filename, absname; |
1f8653eb RS |
2636 | int fd; |
2637 | ||
b7826503 | 2638 | CHECK_STRING (filename); |
49475635 EZ |
2639 | absname = Fexpand_file_name (filename, Qnil); |
2640 | ||
b7826503 | 2641 | CHECK_STRING (string); |
1f8653eb RS |
2642 | |
2643 | /* If the file name has special constructs in it, | |
2644 | call the corresponding file handler. */ | |
49475635 | 2645 | handler = Ffind_file_name_handler (absname, Qaccess_file); |
1f8653eb | 2646 | if (!NILP (handler)) |
49475635 | 2647 | return call3 (handler, Qaccess_file, absname, string); |
1f8653eb | 2648 | |
49475635 | 2649 | encoded_filename = ENCODE_FILE (absname); |
b1d1b865 | 2650 | |
42a5b22f | 2651 | fd = emacs_open (SSDATA (encoded_filename), O_RDONLY, 0); |
1f8653eb | 2652 | if (fd < 0) |
42a5b22f | 2653 | report_file_error (SSDATA (string), Fcons (filename, Qnil)); |
68c45bf0 | 2654 | emacs_close (fd); |
1f8653eb RS |
2655 | |
2656 | return Qnil; | |
2657 | } | |
2658 | \f | |
a7ca3326 | 2659 | DEFUN ("file-symlink-p", Ffile_symlink_p, Sfile_symlink_p, 1, 1, 0, |
8c1a1077 | 2660 | doc: /* Return non-nil if file FILENAME is the name of a symbolic link. |
1c353c74 | 2661 | The value is the link target, as a string. |
68780e2a RS |
2662 | Otherwise it returns nil. |
2663 | ||
2664 | This function returns t when given the name of a symlink that | |
2665 | points to a nonexistent file. */) | |
5842a27b | 2666 | (Lisp_Object filename) |
570d7624 | 2667 | { |
32f4334d | 2668 | Lisp_Object handler; |
ae0d7250 | 2669 | char *buf; |
ae0d7250 | 2670 | Lisp_Object val; |
d1fdcab7 | 2671 | char readlink_buf[READLINK_BUFSIZE]; |
570d7624 | 2672 | |
b7826503 | 2673 | CHECK_STRING (filename); |
570d7624 JB |
2674 | filename = Fexpand_file_name (filename, Qnil); |
2675 | ||
32f4334d RS |
2676 | /* If the file name has special constructs in it, |
2677 | call the corresponding file handler. */ | |
49307295 | 2678 | handler = Ffind_file_name_handler (filename, Qfile_symlink_p); |
32f4334d RS |
2679 | if (!NILP (handler)) |
2680 | return call2 (handler, Qfile_symlink_p, filename); | |
2681 | ||
b1d1b865 RS |
2682 | filename = ENCODE_FILE (filename); |
2683 | ||
d1fdcab7 PE |
2684 | buf = emacs_readlink (SSDATA (filename), readlink_buf); |
2685 | if (! buf) | |
2686 | return Qnil; | |
efdc16c9 | 2687 | |
d1fdcab7 | 2688 | val = build_string (buf); |
8966b757 | 2689 | if (buf[0] == '/' && strchr (buf, ':')) |
69ac1891 | 2690 | val = concat2 (build_string ("/:"), val); |
d1fdcab7 PE |
2691 | if (buf != readlink_buf) |
2692 | xfree (buf); | |
cd913586 KH |
2693 | val = DECODE_FILE (val); |
2694 | return val; | |
570d7624 JB |
2695 | } |
2696 | ||
a7ca3326 | 2697 | DEFUN ("file-directory-p", Ffile_directory_p, Sfile_directory_p, 1, 1, 0, |
8c1a1077 PJ |
2698 | doc: /* Return t if FILENAME names an existing directory. |
2699 | Symbolic links to directories count as directories. | |
2700 | See `file-symlink-p' to distinguish symlinks. */) | |
5842a27b | 2701 | (Lisp_Object filename) |
570d7624 | 2702 | { |
199607e4 | 2703 | register Lisp_Object absname; |
570d7624 | 2704 | struct stat st; |
32f4334d | 2705 | Lisp_Object handler; |
570d7624 | 2706 | |
4b4deea2 | 2707 | absname = expand_and_dir_to_file (filename, BVAR (current_buffer, directory)); |
570d7624 | 2708 | |
32f4334d RS |
2709 | /* If the file name has special constructs in it, |
2710 | call the corresponding file handler. */ | |
199607e4 | 2711 | handler = Ffind_file_name_handler (absname, Qfile_directory_p); |
32f4334d | 2712 | if (!NILP (handler)) |
199607e4 | 2713 | return call2 (handler, Qfile_directory_p, absname); |
32f4334d | 2714 | |
b1d1b865 RS |
2715 | absname = ENCODE_FILE (absname); |
2716 | ||
42a5b22f | 2717 | if (stat (SSDATA (absname), &st) < 0) |
570d7624 | 2718 | return Qnil; |
f68c809d | 2719 | return S_ISDIR (st.st_mode) ? Qt : Qnil; |
570d7624 JB |
2720 | } |
2721 | ||
a7ca3326 | 2722 | DEFUN ("file-accessible-directory-p", Ffile_accessible_directory_p, |
16a97296 | 2723 | Sfile_accessible_directory_p, 1, 1, 0, |
e385ec41 RS |
2724 | doc: /* Return t if file FILENAME names a directory you can open. |
2725 | For the value to be t, FILENAME must specify the name of a directory as a file, | |
2726 | and the directory must allow you to open files in it. In order to use a | |
8c1a1077 PJ |
2727 | directory as a buffer's current directory, this predicate must return true. |
2728 | A directory name spec may be given instead; then the value is t | |
2729 | if the directory so specified exists and really is a readable and | |
2730 | searchable directory. */) | |
5842a27b | 2731 | (Lisp_Object filename) |
b72dea2a | 2732 | { |
32f4334d | 2733 | Lisp_Object handler; |
1a04498e | 2734 | int tem; |
d26859eb | 2735 | struct gcpro gcpro1; |
32f4334d RS |
2736 | |
2737 | /* If the file name has special constructs in it, | |
2738 | call the corresponding file handler. */ | |
49307295 | 2739 | handler = Ffind_file_name_handler (filename, Qfile_accessible_directory_p); |
32f4334d RS |
2740 | if (!NILP (handler)) |
2741 | return call2 (handler, Qfile_accessible_directory_p, filename); | |
2742 | ||
d26859eb | 2743 | GCPRO1 (filename); |
1a04498e KH |
2744 | tem = (NILP (Ffile_directory_p (filename)) |
2745 | || NILP (Ffile_executable_p (filename))); | |
d26859eb | 2746 | UNGCPRO; |
1a04498e | 2747 | return tem ? Qnil : Qt; |
b72dea2a JB |
2748 | } |
2749 | ||
f793dc6c | 2750 | DEFUN ("file-regular-p", Ffile_regular_p, Sfile_regular_p, 1, 1, 0, |
19a9c3b7 LH |
2751 | doc: /* Return t if FILENAME names a regular file. |
2752 | This is the sort of file that holds an ordinary stream of data bytes. | |
2753 | Symbolic links to regular files count as regular files. | |
2754 | See `file-symlink-p' to distinguish symlinks. */) | |
5842a27b | 2755 | (Lisp_Object filename) |
f793dc6c | 2756 | { |
199607e4 | 2757 | register Lisp_Object absname; |
f793dc6c RS |
2758 | struct stat st; |
2759 | Lisp_Object handler; | |
2760 | ||
4b4deea2 | 2761 | absname = expand_and_dir_to_file (filename, BVAR (current_buffer, directory)); |
f793dc6c RS |
2762 | |
2763 | /* If the file name has special constructs in it, | |
2764 | call the corresponding file handler. */ | |
199607e4 | 2765 | handler = Ffind_file_name_handler (absname, Qfile_regular_p); |
f793dc6c | 2766 | if (!NILP (handler)) |
199607e4 | 2767 | return call2 (handler, Qfile_regular_p, absname); |
f793dc6c | 2768 | |
b1d1b865 RS |
2769 | absname = ENCODE_FILE (absname); |
2770 | ||
c1c4693e RS |
2771 | #ifdef WINDOWSNT |
2772 | { | |
2773 | int result; | |
2774 | Lisp_Object tem = Vw32_get_true_file_attributes; | |
2775 | ||
2776 | /* Tell stat to use expensive method to get accurate info. */ | |
2777 | Vw32_get_true_file_attributes = Qt; | |
d5db4077 | 2778 | result = stat (SDATA (absname), &st); |
c1c4693e RS |
2779 | Vw32_get_true_file_attributes = tem; |
2780 | ||
2781 | if (result < 0) | |
2782 | return Qnil; | |
f68c809d | 2783 | return S_ISREG (st.st_mode) ? Qt : Qnil; |
c1c4693e RS |
2784 | } |
2785 | #else | |
42a5b22f | 2786 | if (stat (SSDATA (absname), &st) < 0) |
f793dc6c | 2787 | return Qnil; |
f68c809d | 2788 | return S_ISREG (st.st_mode) ? Qt : Qnil; |
c1c4693e | 2789 | #endif |
f793dc6c RS |
2790 | } |
2791 | \f | |
574c05e2 KK |
2792 | DEFUN ("file-selinux-context", Ffile_selinux_context, |
2793 | Sfile_selinux_context, 1, 1, 0, | |
fa74b241 CY |
2794 | doc: /* Return SELinux context of file named FILENAME. |
2795 | The return value is a list (USER ROLE TYPE RANGE), where the list | |
2796 | elements are strings naming the user, role, type, and range of the | |
2797 | file's SELinux security context. | |
2798 | ||
2799 | Return (nil nil nil nil) if the file is nonexistent or inaccessible, | |
2800 | or if SELinux is disabled, or if Emacs lacks SELinux support. */) | |
5842a27b | 2801 | (Lisp_Object filename) |
574c05e2 KK |
2802 | { |
2803 | Lisp_Object absname; | |
2804 | Lisp_Object values[4]; | |
2805 | Lisp_Object handler; | |
2806 | #if HAVE_LIBSELINUX | |
2807 | security_context_t con; | |
2808 | int conlength; | |
2809 | context_t context; | |
2810 | #endif | |
2811 | ||
4b4deea2 | 2812 | absname = expand_and_dir_to_file (filename, BVAR (current_buffer, directory)); |
574c05e2 KK |
2813 | |
2814 | /* If the file name has special constructs in it, | |
2815 | call the corresponding file handler. */ | |
2816 | handler = Ffind_file_name_handler (absname, Qfile_selinux_context); | |
2817 | if (!NILP (handler)) | |
2818 | return call2 (handler, Qfile_selinux_context, absname); | |
2819 | ||
2820 | absname = ENCODE_FILE (absname); | |
2821 | ||
2822 | values[0] = Qnil; | |
2823 | values[1] = Qnil; | |
2824 | values[2] = Qnil; | |
2825 | values[3] = Qnil; | |
2826 | #if HAVE_LIBSELINUX | |
2827 | if (is_selinux_enabled ()) | |
2828 | { | |
b14aac08 | 2829 | conlength = lgetfilecon (SSDATA (absname), &con); |
574c05e2 KK |
2830 | if (conlength > 0) |
2831 | { | |
2832 | context = context_new (con); | |
45841e65 KK |
2833 | if (context_user_get (context)) |
2834 | values[0] = build_string (context_user_get (context)); | |
2835 | if (context_role_get (context)) | |
2836 | values[1] = build_string (context_role_get (context)); | |
2837 | if (context_type_get (context)) | |
2838 | values[2] = build_string (context_type_get (context)); | |
2839 | if (context_range_get (context)) | |
2840 | values[3] = build_string (context_range_get (context)); | |
574c05e2 KK |
2841 | context_free (context); |
2842 | } | |
2843 | if (con) | |
2844 | freecon (con); | |
2845 | } | |
2846 | #endif | |
2847 | ||
5e617bc2 | 2848 | return Flist (sizeof (values) / sizeof (values[0]), values); |
574c05e2 KK |
2849 | } |
2850 | \f | |
2851 | DEFUN ("set-file-selinux-context", Fset_file_selinux_context, | |
2852 | Sset_file_selinux_context, 2, 2, 0, | |
fa74b241 CY |
2853 | doc: /* Set SELinux context of file named FILENAME to CONTEXT. |
2854 | CONTEXT should be a list (USER ROLE TYPE RANGE), where the list | |
2855 | elements are strings naming the components of a SELinux context. | |
2856 | ||
2857 | This function does nothing if SELinux is disabled, or if Emacs was not | |
2858 | compiled with SELinux support. */) | |
5842a27b | 2859 | (Lisp_Object filename, Lisp_Object context) |
574c05e2 | 2860 | { |
0f4a96b5 | 2861 | Lisp_Object absname; |
574c05e2 | 2862 | Lisp_Object handler; |
0f4a96b5 JB |
2863 | #if HAVE_LIBSELINUX |
2864 | Lisp_Object encoded_absname; | |
574c05e2 KK |
2865 | Lisp_Object user = CAR_SAFE (context); |
2866 | Lisp_Object role = CAR_SAFE (CDR_SAFE (context)); | |
2867 | Lisp_Object type = CAR_SAFE (CDR_SAFE (CDR_SAFE (context))); | |
2868 | Lisp_Object range = CAR_SAFE (CDR_SAFE (CDR_SAFE (CDR_SAFE (context)))); | |
574c05e2 KK |
2869 | security_context_t con; |
2870 | int fail, conlength; | |
2871 | context_t parsed_con; | |
2872 | #endif | |
2873 | ||
4b4deea2 | 2874 | absname = Fexpand_file_name (filename, BVAR (current_buffer, directory)); |
574c05e2 KK |
2875 | |
2876 | /* If the file name has special constructs in it, | |
2877 | call the corresponding file handler. */ | |
2878 | handler = Ffind_file_name_handler (absname, Qset_file_selinux_context); | |
2879 | if (!NILP (handler)) | |
2880 | return call3 (handler, Qset_file_selinux_context, absname, context); | |
2881 | ||
0f4a96b5 | 2882 | #if HAVE_LIBSELINUX |
574c05e2 KK |
2883 | if (is_selinux_enabled ()) |
2884 | { | |
2885 | /* Get current file context. */ | |
a9b53ad3 | 2886 | encoded_absname = ENCODE_FILE (absname); |
b14aac08 | 2887 | conlength = lgetfilecon (SSDATA (encoded_absname), &con); |
574c05e2 KK |
2888 | if (conlength > 0) |
2889 | { | |
2890 | parsed_con = context_new (con); | |
2891 | /* Change the parts defined in the parameter.*/ | |
2892 | if (STRINGP (user)) | |
2893 | { | |
b14aac08 | 2894 | if (context_user_set (parsed_con, SSDATA (user))) |
574c05e2 KK |
2895 | error ("Doing context_user_set"); |
2896 | } | |
2897 | if (STRINGP (role)) | |
2898 | { | |
b14aac08 | 2899 | if (context_role_set (parsed_con, SSDATA (role))) |
574c05e2 KK |
2900 | error ("Doing context_role_set"); |
2901 | } | |
2902 | if (STRINGP (type)) | |
2903 | { | |
b14aac08 | 2904 | if (context_type_set (parsed_con, SSDATA (type))) |
574c05e2 KK |
2905 | error ("Doing context_type_set"); |
2906 | } | |
2907 | if (STRINGP (range)) | |
2908 | { | |
b14aac08 | 2909 | if (context_range_set (parsed_con, SSDATA (range))) |
574c05e2 KK |
2910 | error ("Doing context_range_set"); |
2911 | } | |
2912 | ||
24c51a09 | 2913 | /* Set the modified context back to the file. */ |
b14aac08 PE |
2914 | fail = lsetfilecon (SSDATA (encoded_absname), |
2915 | context_str (parsed_con)); | |
24c51a09 GM |
2916 | /* See http://debbugs.gnu.org/11245 for ENOTSUP. */ |
2917 | if (fail && errno != ENOTSUP) | |
574c05e2 KK |
2918 | report_file_error ("Doing lsetfilecon", Fcons (absname, Qnil)); |
2919 | ||
2920 | context_free (parsed_con); | |
2921 | } | |
2922 | else | |
5e617bc2 | 2923 | report_file_error ("Doing lgetfilecon", Fcons (absname, Qnil)); |
574c05e2 KK |
2924 | |
2925 | if (con) | |
2926 | freecon (con); | |
2927 | } | |
2928 | #endif | |
2929 | ||
2930 | return Qnil; | |
2931 | } | |
2932 | \f | |
570d7624 | 2933 | DEFUN ("file-modes", Ffile_modes, Sfile_modes, 1, 1, 0, |
d4a42098 KS |
2934 | doc: /* Return mode bits of file named FILENAME, as an integer. |
2935 | Return nil, if file does not exist or is not accessible. */) | |
5842a27b | 2936 | (Lisp_Object filename) |
570d7624 | 2937 | { |
199607e4 | 2938 | Lisp_Object absname; |
570d7624 | 2939 | struct stat st; |
32f4334d | 2940 | Lisp_Object handler; |
570d7624 | 2941 | |
4b4deea2 | 2942 | absname = expand_and_dir_to_file (filename, BVAR (current_buffer, directory)); |
570d7624 | 2943 | |
32f4334d RS |
2944 | /* If the file name has special constructs in it, |
2945 | call the corresponding file handler. */ | |
199607e4 | 2946 | handler = Ffind_file_name_handler (absname, Qfile_modes); |
32f4334d | 2947 | if (!NILP (handler)) |
199607e4 | 2948 | return call2 (handler, Qfile_modes, absname); |
32f4334d | 2949 | |
b1d1b865 RS |
2950 | absname = ENCODE_FILE (absname); |
2951 | ||
42a5b22f | 2952 | if (stat (SSDATA (absname), &st) < 0) |
570d7624 | 2953 | return Qnil; |
3ace87e3 | 2954 | |
570d7624 JB |
2955 | return make_number (st.st_mode & 07777); |
2956 | } | |
2957 | ||
09fbdf6c MC |
2958 | DEFUN ("set-file-modes", Fset_file_modes, Sset_file_modes, 2, 2, |
2959 | "(let ((file (read-file-name \"File: \"))) \ | |
2960 | (list file (read-file-modes nil file)))", | |
8c1a1077 | 2961 | doc: /* Set mode bits of file named FILENAME to MODE (an integer). |
ea429250 EZ |
2962 | Only the 12 low bits of MODE are used. |
2963 | ||
2964 | Interactively, mode bits are read by `read-file-modes', which accepts | |
712adc82 | 2965 | symbolic notation, like the `chmod' command from GNU Coreutils. */) |
5842a27b | 2966 | (Lisp_Object filename, Lisp_Object mode) |
570d7624 | 2967 | { |
b1d1b865 | 2968 | Lisp_Object absname, encoded_absname; |
32f4334d | 2969 | Lisp_Object handler; |
570d7624 | 2970 | |
4b4deea2 | 2971 | absname = Fexpand_file_name (filename, BVAR (current_buffer, directory)); |
b7826503 | 2972 | CHECK_NUMBER (mode); |
570d7624 | 2973 | |
32f4334d RS |
2974 | /* If the file name has special constructs in it, |
2975 | call the corresponding file handler. */ | |
199607e4 | 2976 | handler = Ffind_file_name_handler (absname, Qset_file_modes); |
32f4334d | 2977 | if (!NILP (handler)) |
199607e4 | 2978 | return call3 (handler, Qset_file_modes, absname, mode); |
32f4334d | 2979 | |
b1d1b865 RS |
2980 | encoded_absname = ENCODE_FILE (absname); |
2981 | ||
18c52557 | 2982 | if (chmod (SSDATA (encoded_absname), XINT (mode) & 07777) < 0) |
199607e4 | 2983 | report_file_error ("Doing chmod", Fcons (absname, Qnil)); |
570d7624 JB |
2984 | |
2985 | return Qnil; | |
2986 | } | |
2987 | ||
c24e9a53 | 2988 | DEFUN ("set-default-file-modes", Fset_default_file_modes, Sset_default_file_modes, 1, 1, 0, |
8c1a1077 PJ |
2989 | doc: /* Set the file permission bits for newly created files. |
2990 | The argument MODE should be an integer; only the low 9 bits are used. | |
2991 | This setting is inherited by subprocesses. */) | |
5842a27b | 2992 | (Lisp_Object mode) |
36a8c287 | 2993 | { |
b7826503 | 2994 | CHECK_NUMBER (mode); |
199607e4 | 2995 | |
5f85ea58 | 2996 | umask ((~ XINT (mode)) & 0777); |
36a8c287 JB |
2997 | |
2998 | return Qnil; | |
2999 | } | |
3000 | ||
c24e9a53 | 3001 | DEFUN ("default-file-modes", Fdefault_file_modes, Sdefault_file_modes, 0, 0, 0, |
8c1a1077 PJ |
3002 | doc: /* Return the default file protection for created files. |
3003 | The value is an integer. */) | |
5842a27b | 3004 | (void) |
36a8c287 | 3005 | { |
5f85ea58 RS |
3006 | int realmask; |
3007 | Lisp_Object value; | |
36a8c287 | 3008 | |
f10deafb | 3009 | BLOCK_INPUT; |
5f85ea58 RS |
3010 | realmask = umask (0); |
3011 | umask (realmask); | |
f10deafb | 3012 | UNBLOCK_INPUT; |
36a8c287 | 3013 | |
46283abe | 3014 | XSETINT (value, (~ realmask) & 0777); |
5f85ea58 | 3015 | return value; |
36a8c287 | 3016 | } |
819da85b | 3017 | \f |
819da85b EZ |
3018 | |
3019 | DEFUN ("set-file-times", Fset_file_times, Sset_file_times, 1, 2, 0, | |
f839df0c | 3020 | doc: /* Set times of file FILENAME to TIMESTAMP. |
819da85b EZ |
3021 | Set both access and modification times. |
3022 | Return t on success, else nil. | |
f839df0c | 3023 | Use the current time if TIMESTAMP is nil. TIMESTAMP is in the format of |
819da85b | 3024 | `current-time'. */) |
f839df0c | 3025 | (Lisp_Object filename, Lisp_Object timestamp) |
819da85b EZ |
3026 | { |
3027 | Lisp_Object absname, encoded_absname; | |
3028 | Lisp_Object handler; | |
31571fd7 | 3029 | EMACS_TIME t = lisp_time_argument (timestamp); |
819da85b | 3030 | |
4b4deea2 | 3031 | absname = Fexpand_file_name (filename, BVAR (current_buffer, directory)); |
819da85b EZ |
3032 | |
3033 | /* If the file name has special constructs in it, | |
3034 | call the corresponding file handler. */ | |
3035 | handler = Ffind_file_name_handler (absname, Qset_file_times); | |
3036 | if (!NILP (handler)) | |
f839df0c | 3037 | return call3 (handler, Qset_file_times, absname, timestamp); |
819da85b EZ |
3038 | |
3039 | encoded_absname = ENCODE_FILE (absname); | |
5df5e07c | 3040 | |
819da85b | 3041 | { |
d35af63c | 3042 | if (set_file_times (-1, SSDATA (encoded_absname), t, t)) |
819da85b EZ |
3043 | { |
3044 | #ifdef DOS_NT | |
3045 | struct stat st; | |
3046 | ||
3047 | /* Setting times on a directory always fails. */ | |
f68c809d | 3048 | if (stat (SSDATA (encoded_absname), &st) == 0 && S_ISDIR (st.st_mode)) |
819da85b EZ |
3049 | return Qnil; |
3050 | #endif | |
3051 | report_file_error ("Setting file times", Fcons (absname, Qnil)); | |
3052 | return Qnil; | |
3053 | } | |
3054 | } | |
5df5e07c | 3055 | |
819da85b EZ |
3056 | return Qt; |
3057 | } | |
f793dc6c | 3058 | \f |
697c17a2 | 3059 | #ifdef HAVE_SYNC |
85ffea93 | 3060 | DEFUN ("unix-sync", Funix_sync, Sunix_sync, 0, 0, "", |
8c1a1077 | 3061 | doc: /* Tell Unix to finish all pending disk updates. */) |
5842a27b | 3062 | (void) |
85ffea93 RS |
3063 | { |
3064 | sync (); | |
3065 | return Qnil; | |
3066 | } | |
3067 | ||
697c17a2 | 3068 | #endif /* HAVE_SYNC */ |
85ffea93 | 3069 | |
570d7624 | 3070 | DEFUN ("file-newer-than-file-p", Ffile_newer_than_file_p, Sfile_newer_than_file_p, 2, 2, 0, |
8c1a1077 PJ |
3071 | doc: /* Return t if file FILE1 is newer than file FILE2. |
3072 | If FILE1 does not exist, the answer is nil; | |
3073 | otherwise, if FILE2 does not exist, the answer is t. */) | |
5842a27b | 3074 | (Lisp_Object file1, Lisp_Object file2) |
570d7624 | 3075 | { |
199607e4 | 3076 | Lisp_Object absname1, absname2; |
39adff0d | 3077 | struct stat st1, st2; |
32f4334d | 3078 | Lisp_Object handler; |
09121adc | 3079 | struct gcpro gcpro1, gcpro2; |
570d7624 | 3080 | |
b7826503 PJ |
3081 | CHECK_STRING (file1); |
3082 | CHECK_STRING (file2); | |
570d7624 | 3083 | |
199607e4 RS |
3084 | absname1 = Qnil; |
3085 | GCPRO2 (absname1, file2); | |
4b4deea2 TT |
3086 | absname1 = expand_and_dir_to_file (file1, BVAR (current_buffer, directory)); |
3087 | absname2 = expand_and_dir_to_file (file2, BVAR (current_buffer, directory)); | |
09121adc | 3088 | UNGCPRO; |
570d7624 | 3089 | |
32f4334d RS |
3090 | /* If the file name has special constructs in it, |
3091 | call the corresponding file handler. */ | |
199607e4 | 3092 | handler = Ffind_file_name_handler (absname1, Qfile_newer_than_file_p); |
51cf6d37 | 3093 | if (NILP (handler)) |
199607e4 | 3094 | handler = Ffind_file_name_handler (absname2, Qfile_newer_than_file_p); |
32f4334d | 3095 | if (!NILP (handler)) |
199607e4 | 3096 | return call3 (handler, Qfile_newer_than_file_p, absname1, absname2); |
32f4334d | 3097 | |
b1d1b865 RS |
3098 | GCPRO2 (absname1, absname2); |
3099 | absname1 = ENCODE_FILE (absname1); | |
3100 | absname2 = ENCODE_FILE (absname2); | |
3101 | UNGCPRO; | |
3102 | ||
39adff0d | 3103 | if (stat (SSDATA (absname1), &st1) < 0) |
570d7624 JB |
3104 | return Qnil; |
3105 | ||
39adff0d | 3106 | if (stat (SSDATA (absname2), &st2) < 0) |
570d7624 JB |
3107 | return Qt; |
3108 | ||
39adff0d PE |
3109 | return (EMACS_TIME_GT (get_stat_mtime (&st1), get_stat_mtime (&st2)) |
3110 | ? Qt : Qnil); | |
570d7624 JB |
3111 | } |
3112 | \f | |
6fdaa9a0 KH |
3113 | #ifndef READ_BUF_SIZE |
3114 | #define READ_BUF_SIZE (64 << 10) | |
3115 | #endif | |
d311d28c PE |
3116 | /* Some buffer offsets are stored in 'int' variables. */ |
3117 | verify (READ_BUF_SIZE <= INT_MAX); | |
6fdaa9a0 | 3118 | |
98a7d268 KH |
3119 | /* This function is called after Lisp functions to decide a coding |
3120 | system are called, or when they cause an error. Before they are | |
3121 | called, the current buffer is set unibyte and it contains only a | |
3122 | newly inserted text (thus the buffer was empty before the | |
3123 | insertion). | |
3124 | ||
3125 | The functions may set markers, overlays, text properties, or even | |
3126 | alter the buffer contents, change the current buffer. | |
3127 | ||
3128 | Here, we reset all those changes by: | |
3129 | o set back the current buffer. | |
3130 | o move all markers and overlays to BEG. | |
3131 | o remove all text properties. | |
3132 | o set back the buffer multibyteness. */ | |
f736ffbf KH |
3133 | |
3134 | static Lisp_Object | |
971de7fb | 3135 | decide_coding_unwind (Lisp_Object unwind_data) |
f736ffbf | 3136 | { |
98a7d268 | 3137 | Lisp_Object multibyte, undo_list, buffer; |
f736ffbf | 3138 | |
98a7d268 KH |
3139 | multibyte = XCAR (unwind_data); |
3140 | unwind_data = XCDR (unwind_data); | |
3141 | undo_list = XCAR (unwind_data); | |
3142 | buffer = XCDR (unwind_data); | |
3143 | ||
3144 | if (current_buffer != XBUFFER (buffer)) | |
3145 | set_buffer_internal (XBUFFER (buffer)); | |
3146 | adjust_markers_for_delete (BEG, BEG_BYTE, Z, Z_BYTE); | |
3147 | adjust_overlays_for_delete (BEG, Z - BEG); | |
3148 | BUF_INTERVALS (current_buffer) = 0; | |
3149 | TEMP_SET_PT_BOTH (BEG, BEG_BYTE); | |
3150 | ||
3151 | /* Now we are safe to change the buffer's multibyteness directly. */ | |
4b4deea2 TT |
3152 | BVAR (current_buffer, enable_multibyte_characters) = multibyte; |
3153 | BVAR (current_buffer, undo_list) = undo_list; | |
f736ffbf KH |
3154 | |
3155 | return Qnil; | |
3156 | } | |
3157 | ||
55587f8a | 3158 | |
1b978129 | 3159 | /* Used to pass values from insert-file-contents to read_non_regular. */ |
55587f8a | 3160 | |
1b978129 | 3161 | static int non_regular_fd; |
d311d28c PE |
3162 | static ptrdiff_t non_regular_inserted; |
3163 | static int non_regular_nbytes; | |
55587f8a | 3164 | |
55587f8a | 3165 | |
1b978129 | 3166 | /* Read from a non-regular file. |
438105ed | 3167 | Read non_regular_nbytes bytes max from non_regular_fd. |
1b978129 GM |
3168 | Non_regular_inserted specifies where to put the read bytes. |
3169 | Value is the number of bytes read. */ | |
55587f8a GM |
3170 | |
3171 | static Lisp_Object | |
9c8a2331 | 3172 | read_non_regular (Lisp_Object ignore) |
55587f8a | 3173 | { |
d311d28c | 3174 | int nbytes; |
efdc16c9 | 3175 | |
1b978129 GM |
3176 | immediate_quit = 1; |
3177 | QUIT; | |
3178 | nbytes = emacs_read (non_regular_fd, | |
5976c3fe PE |
3179 | ((char *) BEG_ADDR + PT_BYTE - BEG_BYTE |
3180 | + non_regular_inserted), | |
1b978129 | 3181 | non_regular_nbytes); |
1b978129 GM |
3182 | immediate_quit = 0; |
3183 | return make_number (nbytes); | |
3184 | } | |
55587f8a | 3185 | |
d0e2444e | 3186 | |
1b978129 GM |
3187 | /* Condition-case handler used when reading from non-regular files |
3188 | in insert-file-contents. */ | |
3189 | ||
3190 | static Lisp_Object | |
9c8a2331 | 3191 | read_non_regular_quit (Lisp_Object ignore) |
1b978129 | 3192 | { |
55587f8a GM |
3193 | return Qnil; |
3194 | } | |
3195 | ||
e69dafad PE |
3196 | /* Reposition FD to OFFSET, based on WHENCE. This acts like lseek |
3197 | except that it also tests for OFFSET being out of lseek's range. */ | |
3198 | static off_t | |
3199 | emacs_lseek (int fd, EMACS_INT offset, int whence) | |
3200 | { | |
096a9774 PE |
3201 | /* Use "&" rather than "&&" to suppress a bogus GCC warning; see |
3202 | <http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43772>. */ | |
3203 | if (! ((TYPE_MINIMUM (off_t) <= offset) & (offset <= TYPE_MAXIMUM (off_t)))) | |
e69dafad PE |
3204 | { |
3205 | errno = EINVAL; | |
3206 | return -1; | |
3207 | } | |
3208 | return lseek (fd, offset, whence); | |
3209 | } | |
3210 | ||
f0941253 | 3211 | /* Return a special time value indicating the error number ERRNUM. */ |
dbeed9a6 | 3212 | static EMACS_TIME |
f0941253 | 3213 | time_error_value (int errnum) |
dbeed9a6 | 3214 | { |
0497dc44 | 3215 | int ns = (errnum == ENOENT || errnum == EACCES || errnum == ENOTDIR |
dbeed9a6 PE |
3216 | ? NONEXISTENT_MODTIME_NSECS |
3217 | : UNKNOWN_MODTIME_NSECS); | |
e9a9ae03 | 3218 | return make_emacs_time (0, ns); |
dbeed9a6 | 3219 | } |
55587f8a | 3220 | |
570d7624 | 3221 | DEFUN ("insert-file-contents", Finsert_file_contents, Sinsert_file_contents, |
8c1a1077 PJ |
3222 | 1, 5, 0, |
3223 | doc: /* Insert contents of file FILENAME after point. | |
cf6d2357 | 3224 | Returns list of absolute file name and number of characters inserted. |
6f2528d8 MR |
3225 | If second argument VISIT is non-nil, the buffer's visited filename and |
3226 | last save file modtime are set, and it is marked unmodified. If | |
3227 | visiting and the file does not exist, visiting is completed before the | |
3228 | error is signaled. | |
3229 | ||
3230 | The optional third and fourth arguments BEG and END specify what portion | |
3231 | of the file to insert. These arguments count bytes in the file, not | |
3232 | characters in the buffer. If VISIT is non-nil, BEG and END must be nil. | |
3233 | ||
3234 | If optional fifth argument REPLACE is non-nil, replace the current | |
3235 | buffer contents (in the accessible portion) with the file contents. | |
3236 | This is better than simply deleting and inserting the whole thing | |
3237 | because (1) it preserves some marker positions and (2) it puts less data | |
3238 | in the undo list. When REPLACE is non-nil, the second return value is | |
3239 | the number of characters that replace previous buffer contents. | |
3240 | ||
3241 | This function does code conversion according to the value of | |
3242 | `coding-system-for-read' or `file-coding-system-alist', and sets the | |
3243 | variable `last-coding-system-used' to the coding system actually used. */) | |
5842a27b | 3244 | (Lisp_Object filename, Lisp_Object visit, Lisp_Object beg, Lisp_Object end, Lisp_Object replace) |
570d7624 JB |
3245 | { |
3246 | struct stat st; | |
dbeed9a6 PE |
3247 | int file_status; |
3248 | EMACS_TIME mtime; | |
570d7624 | 3249 | register int fd; |
d311d28c | 3250 | ptrdiff_t inserted = 0; |
18a9f8d9 | 3251 | int nochange = 0; |
d311d28c | 3252 | register ptrdiff_t how_much; |
728f8f0a | 3253 | off_t beg_offset, end_offset; |
d311d28c PE |
3254 | register int unprocessed; |
3255 | ptrdiff_t count = SPECPDL_INDEX (); | |
6f2528d8 MR |
3256 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4, gcpro5; |
3257 | Lisp_Object handler, val, insval, orig_filename, old_undo; | |
d6a3cc15 | 3258 | Lisp_Object p; |
d311d28c | 3259 | ptrdiff_t total = 0; |
53c34c46 | 3260 | int not_regular = 0; |
e5e9d610 | 3261 | int save_errno = 0; |
5976c3fe | 3262 | char read_buf[READ_BUF_SIZE]; |
6fdaa9a0 | 3263 | struct coding_system coding; |
5976c3fe | 3264 | char buffer[1 << 14]; |
727a0b4a | 3265 | int replace_handled = 0; |
ec7adf26 | 3266 | int set_coding_system = 0; |
db327c7e | 3267 | Lisp_Object coding_system; |
1b978129 | 3268 | int read_quit = 0; |
490ee853 | 3269 | Lisp_Object old_Vdeactivate_mark = Vdeactivate_mark; |
68780e2a | 3270 | int we_locked_file = 0; |
db65a627 | 3271 | int deferred_remove_unwind_protect = 0; |
32f4334d | 3272 | |
95385625 RS |
3273 | if (current_buffer->base_buffer && ! NILP (visit)) |
3274 | error ("Cannot do file visiting in an indirect buffer"); | |
3275 | ||
4b4deea2 | 3276 | if (!NILP (BVAR (current_buffer, read_only))) |
95385625 RS |
3277 | Fbarf_if_buffer_read_only (); |
3278 | ||
32f4334d | 3279 | val = Qnil; |
d6a3cc15 | 3280 | p = Qnil; |
b1d1b865 | 3281 | orig_filename = Qnil; |
6f2528d8 | 3282 | old_undo = Qnil; |
32f4334d | 3283 | |
6f2528d8 | 3284 | GCPRO5 (filename, val, p, orig_filename, old_undo); |
570d7624 | 3285 | |
b7826503 | 3286 | CHECK_STRING (filename); |
570d7624 JB |
3287 | filename = Fexpand_file_name (filename, Qnil); |
3288 | ||
1c157f8d KH |
3289 | /* The value Qnil means that the coding system is not yet |
3290 | decided. */ | |
3291 | coding_system = Qnil; | |
3292 | ||
32f4334d RS |
3293 | /* If the file name has special constructs in it, |
3294 | call the corresponding file handler. */ | |
49307295 | 3295 | handler = Ffind_file_name_handler (filename, Qinsert_file_contents); |
32f4334d RS |
3296 | if (!NILP (handler)) |
3297 | { | |
3d0387c0 RS |
3298 | val = call6 (handler, Qinsert_file_contents, filename, |
3299 | visit, beg, end, replace); | |
d311d28c PE |
3300 | if (CONSP (val) && CONSP (XCDR (val)) |
3301 | && RANGED_INTEGERP (0, XCAR (XCDR (val)), ZV - PT)) | |
03699b14 | 3302 | inserted = XINT (XCAR (XCDR (val))); |
32f4334d RS |
3303 | goto handled; |
3304 | } | |
3305 | ||
b1d1b865 RS |
3306 | orig_filename = filename; |
3307 | filename = ENCODE_FILE (filename); | |
3308 | ||
570d7624 JB |
3309 | fd = -1; |
3310 | ||
c1c4693e RS |
3311 | #ifdef WINDOWSNT |
3312 | { | |
3313 | Lisp_Object tem = Vw32_get_true_file_attributes; | |
3314 | ||
3315 | /* Tell stat to use expensive method to get accurate info. */ | |
3316 | Vw32_get_true_file_attributes = Qt; | |
dbeed9a6 | 3317 | file_status = stat (SSDATA (filename), &st); |
c1c4693e RS |
3318 | Vw32_get_true_file_attributes = tem; |
3319 | } | |
c1c4693e | 3320 | #else |
dbeed9a6 | 3321 | file_status = stat (SSDATA (filename), &st); |
c1c4693e | 3322 | #endif /* WINDOWSNT */ |
dbeed9a6 PE |
3323 | |
3324 | if (file_status == 0) | |
3325 | mtime = get_stat_mtime (&st); | |
3326 | else | |
570d7624 | 3327 | { |
99bc28f4 | 3328 | badopen: |
e5e9d610 | 3329 | save_errno = errno; |
265a9e55 | 3330 | if (NILP (visit)) |
b1d1b865 | 3331 | report_file_error ("Opening input file", Fcons (orig_filename, Qnil)); |
f0941253 | 3332 | mtime = time_error_value (save_errno); |
b885bf36 | 3333 | st.st_size = -1; |
570d7624 | 3334 | how_much = 0; |
0de6b8f4 | 3335 | if (!NILP (Vcoding_system_for_read)) |
22d92d6b | 3336 | Fset (Qbuffer_file_coding_system, Vcoding_system_for_read); |
570d7624 JB |
3337 | goto notfound; |
3338 | } | |
3339 | ||
be53b411 JB |
3340 | /* This code will need to be changed in order to work on named |
3341 | pipes, and it's probably just not worth it. So we should at | |
3342 | least signal an error. */ | |
99bc28f4 | 3343 | if (!S_ISREG (st.st_mode)) |
330bfe57 | 3344 | { |
d4b8687b RS |
3345 | not_regular = 1; |
3346 | ||
3347 | if (! NILP (visit)) | |
3348 | goto notfound; | |
3349 | ||
3350 | if (! NILP (replace) || ! NILP (beg) || ! NILP (end)) | |
24b1ddad KS |
3351 | xsignal2 (Qfile_error, |
3352 | build_string ("not a regular file"), orig_filename); | |
330bfe57 | 3353 | } |
be53b411 | 3354 | |
99bc28f4 | 3355 | if (fd < 0) |
42a5b22f | 3356 | if ((fd = emacs_open (SSDATA (filename), O_RDONLY, 0)) < 0) |
99bc28f4 KH |
3357 | goto badopen; |
3358 | ||
3359 | /* Replacement should preserve point as it preserves markers. */ | |
3360 | if (!NILP (replace)) | |
3361 | record_unwind_protect (restore_point_unwind, Fpoint_marker ()); | |
3362 | ||
3363 | record_unwind_protect (close_file_unwind, make_number (fd)); | |
3364 | ||
2a47c44d | 3365 | |
9f57b6b4 KH |
3366 | if (!NILP (visit)) |
3367 | { | |
3368 | if (!NILP (beg) || !NILP (end)) | |
3369 | error ("Attempt to visit less than an entire file"); | |
3370 | if (BEG < Z && NILP (replace)) | |
3371 | error ("Cannot do file visiting in a non-empty buffer"); | |
3372 | } | |
7fded690 JB |
3373 | |
3374 | if (!NILP (beg)) | |
728f8f0a PE |
3375 | { |
3376 | if (! (RANGED_INTEGERP (0, beg, TYPE_MAXIMUM (off_t)))) | |
3377 | wrong_type_argument (intern ("file-offset"), beg); | |
3378 | beg_offset = XFASTINT (beg); | |
3379 | } | |
7fded690 | 3380 | else |
728f8f0a | 3381 | beg_offset = 0; |
7fded690 JB |
3382 | |
3383 | if (!NILP (end)) | |
728f8f0a PE |
3384 | { |
3385 | if (! (RANGED_INTEGERP (0, end, TYPE_MAXIMUM (off_t)))) | |
3386 | wrong_type_argument (intern ("file-offset"), end); | |
3387 | end_offset = XFASTINT (end); | |
3388 | } | |
7fded690 JB |
3389 | else |
3390 | { | |
728f8f0a PE |
3391 | if (not_regular) |
3392 | end_offset = TYPE_MAXIMUM (off_t); | |
3393 | else | |
d4b8687b | 3394 | { |
728f8f0a PE |
3395 | end_offset = st.st_size; |
3396 | ||
3397 | /* A negative size can happen on a platform that allows file | |
3398 | sizes greater than the maximum off_t value. */ | |
3399 | if (end_offset < 0) | |
3400 | buffer_overflow (); | |
68c45bf0 | 3401 | |
d21dd12d GM |
3402 | /* The file size returned from stat may be zero, but data |
3403 | may be readable nonetheless, for example when this is a | |
3404 | file in the /proc filesystem. */ | |
728f8f0a PE |
3405 | if (end_offset == 0) |
3406 | end_offset = READ_BUF_SIZE; | |
d4b8687b | 3407 | } |
7fded690 JB |
3408 | } |
3409 | ||
728f8f0a PE |
3410 | /* Check now whether the buffer will become too large, |
3411 | in the likely case where the file's length is not changing. | |
3412 | This saves a lot of needless work before a buffer overflow. */ | |
3413 | if (! not_regular) | |
3414 | { | |
3415 | /* The likely offset where we will stop reading. We could read | |
3416 | more (or less), if the file grows (or shrinks) as we read it. */ | |
3417 | off_t likely_end = min (end_offset, st.st_size); | |
3418 | ||
3419 | if (beg_offset < likely_end) | |
3420 | { | |
3421 | ptrdiff_t buf_bytes = | |
3422 | Z_BYTE - (!NILP (replace) ? ZV_BYTE - BEGV_BYTE : 0); | |
3423 | ptrdiff_t buf_growth_max = BUF_BYTES_MAX - buf_bytes; | |
3424 | off_t likely_growth = likely_end - beg_offset; | |
3425 | if (buf_growth_max < likely_growth) | |
3426 | buffer_overflow (); | |
3427 | } | |
3428 | } | |
3429 | ||
3430 | /* Prevent redisplay optimizations. */ | |
3431 | current_buffer->clip_changed = 1; | |
3432 | ||
356a6224 | 3433 | if (EQ (Vcoding_system_for_read, Qauto_save_coding)) |
5560aecd | 3434 | { |
75421805 | 3435 | coding_system = coding_inherit_eol_type (Qutf_8_emacs, Qunix); |
5560aecd KH |
3436 | setup_coding_system (coding_system, &coding); |
3437 | /* Ensure we set Vlast_coding_system_used. */ | |
3438 | set_coding_system = 1; | |
3439 | } | |
356a6224 | 3440 | else if (BEG < Z) |
f736ffbf KH |
3441 | { |
3442 | /* Decide the coding system to use for reading the file now | |
3443 | because we can't use an optimized method for handling | |
3444 | `coding:' tag if the current buffer is not empty. */ | |
f736ffbf | 3445 | if (!NILP (Vcoding_system_for_read)) |
db327c7e | 3446 | coding_system = Vcoding_system_for_read; |
f736ffbf KH |
3447 | else |
3448 | { | |
3449 | /* Don't try looking inside a file for a coding system | |
3450 | specification if it is not seekable. */ | |
3451 | if (! not_regular && ! NILP (Vset_auto_coding_function)) | |
3452 | { | |
3453 | /* Find a coding system specified in the heading two | |
3454 | lines or in the tailing several lines of the file. | |
3455 | We assume that the 1K-byte and 3K-byte for heading | |
003a7eaa | 3456 | and tailing respectively are sufficient for this |
f736ffbf | 3457 | purpose. */ |
d311d28c | 3458 | int nread; |
f736ffbf KH |
3459 | |
3460 | if (st.st_size <= (1024 * 4)) | |
68c45bf0 | 3461 | nread = emacs_read (fd, read_buf, 1024 * 4); |
f736ffbf KH |
3462 | else |
3463 | { | |
68c45bf0 | 3464 | nread = emacs_read (fd, read_buf, 1024); |
f736ffbf KH |
3465 | if (nread >= 0) |
3466 | { | |
e69dafad | 3467 | if (lseek (fd, st.st_size - (1024 * 3), SEEK_SET) < 0) |
f736ffbf KH |
3468 | report_file_error ("Setting file position", |
3469 | Fcons (orig_filename, Qnil)); | |
68c45bf0 | 3470 | nread += emacs_read (fd, read_buf + nread, 1024 * 3); |
f736ffbf KH |
3471 | } |
3472 | } | |
feb9dc27 | 3473 | |
f736ffbf KH |
3474 | if (nread < 0) |
3475 | error ("IO error reading %s: %s", | |
d5db4077 | 3476 | SDATA (orig_filename), emacs_strerror (errno)); |
f736ffbf KH |
3477 | else if (nread > 0) |
3478 | { | |
f736ffbf | 3479 | struct buffer *prev = current_buffer; |
f839df0c | 3480 | Lisp_Object workbuf; |
685fc579 | 3481 | struct buffer *buf; |
f736ffbf KH |
3482 | |
3483 | record_unwind_protect (Fset_buffer, Fcurrent_buffer ()); | |
1d92afcd | 3484 | |
f839df0c PE |
3485 | workbuf = Fget_buffer_create (build_string (" *code-converting-work*")); |
3486 | buf = XBUFFER (workbuf); | |
685fc579 | 3487 | |
29ea8ae9 | 3488 | delete_all_overlays (buf); |
4b4deea2 TT |
3489 | BVAR (buf, directory) = BVAR (current_buffer, directory); |
3490 | BVAR (buf, read_only) = Qnil; | |
3491 | BVAR (buf, filename) = Qnil; | |
3492 | BVAR (buf, undo_list) = Qt; | |
29ea8ae9 SM |
3493 | eassert (buf->overlays_before == NULL); |
3494 | eassert (buf->overlays_after == NULL); | |
efdc16c9 | 3495 | |
685fc579 RS |
3496 | set_buffer_internal (buf); |
3497 | Ferase_buffer (); | |
4b4deea2 | 3498 | BVAR (buf, enable_multibyte_characters) = Qnil; |
685fc579 | 3499 | |
b68864e5 | 3500 | insert_1_both ((char *) read_buf, nread, nread, 0, 0, 0); |
f736ffbf | 3501 | TEMP_SET_PT_BOTH (BEG, BEG_BYTE); |
db327c7e | 3502 | coding_system = call2 (Vset_auto_coding_function, |
8f924df7 | 3503 | filename, make_number (nread)); |
f736ffbf | 3504 | set_buffer_internal (prev); |
efdc16c9 | 3505 | |
f736ffbf KH |
3506 | /* Discard the unwind protect for recovering the |
3507 | current buffer. */ | |
3508 | specpdl_ptr--; | |
3509 | ||
3510 | /* Rewind the file for the actual read done later. */ | |
e69dafad | 3511 | if (lseek (fd, 0, SEEK_SET) < 0) |
f736ffbf KH |
3512 | report_file_error ("Setting file position", |
3513 | Fcons (orig_filename, Qnil)); | |
3514 | } | |
3515 | } | |
feb9dc27 | 3516 | |
db327c7e | 3517 | if (NILP (coding_system)) |
f736ffbf KH |
3518 | { |
3519 | /* If we have not yet decided a coding system, check | |
3520 | file-coding-system-alist. */ | |
8f924df7 | 3521 | Lisp_Object args[6]; |
f736ffbf KH |
3522 | |
3523 | args[0] = Qinsert_file_contents, args[1] = orig_filename; | |
3524 | args[2] = visit, args[3] = beg, args[4] = end, args[5] = replace; | |
8f924df7 KH |
3525 | coding_system = Ffind_operation_coding_system (6, args); |
3526 | if (CONSP (coding_system)) | |
3527 | coding_system = XCAR (coding_system); | |
f736ffbf KH |
3528 | } |
3529 | } | |
c9e82392 | 3530 | |
db327c7e KH |
3531 | if (NILP (coding_system)) |
3532 | coding_system = Qundecided; | |
3533 | else | |
3534 | CHECK_CODING_SYSTEM (coding_system); | |
c8a6d68a | 3535 | |
4b4deea2 | 3536 | if (NILP (BVAR (current_buffer, enable_multibyte_characters))) |
237a6fd2 RS |
3537 | /* We must suppress all character code conversion except for |
3538 | end-of-line conversion. */ | |
db327c7e | 3539 | coding_system = raw_text_coding_system (coding_system); |
54369368 | 3540 | |
db327c7e KH |
3541 | setup_coding_system (coding_system, &coding); |
3542 | /* Ensure we set Vlast_coding_system_used. */ | |
3543 | set_coding_system = 1; | |
f736ffbf | 3544 | } |
6cf71bf1 | 3545 | |
3d0387c0 RS |
3546 | /* If requested, replace the accessible part of the buffer |
3547 | with the file contents. Avoid replacing text at the | |
3548 | beginning or end of the buffer that matches the file contents; | |
3dbcf3f6 RS |
3549 | that preserves markers pointing to the unchanged parts. |
3550 | ||
3551 | Here we implement this feature in an optimized way | |
3552 | for the case where code conversion is NOT needed. | |
3553 | The following if-statement handles the case of conversion | |
727a0b4a RS |
3554 | in a less optimal way. |
3555 | ||
3556 | If the code conversion is "automatic" then we try using this | |
3557 | method and hope for the best. | |
3558 | But if we discover the need for conversion, we give up on this method | |
3559 | and let the following if-statement handle the replace job. */ | |
3dbcf3f6 | 3560 | if (!NILP (replace) |
f736ffbf | 3561 | && BEGV < ZV |
db327c7e KH |
3562 | && (NILP (coding_system) |
3563 | || ! CODING_REQUIRE_DECODING (&coding))) | |
3d0387c0 | 3564 | { |
ec7adf26 RS |
3565 | /* same_at_start and same_at_end count bytes, |
3566 | because file access counts bytes | |
3567 | and BEG and END count bytes. */ | |
d311d28c PE |
3568 | ptrdiff_t same_at_start = BEGV_BYTE; |
3569 | ptrdiff_t same_at_end = ZV_BYTE; | |
3570 | ptrdiff_t overlap; | |
6fdaa9a0 KH |
3571 | /* There is still a possibility we will find the need to do code |
3572 | conversion. If that happens, we set this variable to 1 to | |
727a0b4a | 3573 | give up on handling REPLACE in the optimized way. */ |
6fdaa9a0 | 3574 | int giveup_match_end = 0; |
9c28748f | 3575 | |
728f8f0a | 3576 | if (beg_offset != 0) |
4d2a0879 | 3577 | { |
728f8f0a | 3578 | if (lseek (fd, beg_offset, SEEK_SET) < 0) |
4d2a0879 | 3579 | report_file_error ("Setting file position", |
b1d1b865 | 3580 | Fcons (orig_filename, Qnil)); |
4d2a0879 RS |
3581 | } |
3582 | ||
3d0387c0 RS |
3583 | immediate_quit = 1; |
3584 | QUIT; | |
3585 | /* Count how many chars at the start of the file | |
3586 | match the text at the beginning of the buffer. */ | |
3587 | while (1) | |
3588 | { | |
d311d28c | 3589 | int nread, bufpos; |
3d0387c0 | 3590 | |
68c45bf0 | 3591 | nread = emacs_read (fd, buffer, sizeof buffer); |
3d0387c0 RS |
3592 | if (nread < 0) |
3593 | error ("IO error reading %s: %s", | |
5976c3fe | 3594 | SSDATA (orig_filename), emacs_strerror (errno)); |
3d0387c0 RS |
3595 | else if (nread == 0) |
3596 | break; | |
6fdaa9a0 | 3597 | |
db327c7e | 3598 | if (CODING_REQUIRE_DETECTION (&coding)) |
727a0b4a | 3599 | { |
5976c3fe PE |
3600 | coding_system = detect_coding_system ((unsigned char *) buffer, |
3601 | nread, nread, 1, 0, | |
db327c7e KH |
3602 | coding_system); |
3603 | setup_coding_system (coding_system, &coding); | |
727a0b4a RS |
3604 | } |
3605 | ||
db327c7e KH |
3606 | if (CODING_REQUIRE_DECODING (&coding)) |
3607 | /* We found that the file should be decoded somehow. | |
727a0b4a RS |
3608 | Let's give up here. */ |
3609 | { | |
3610 | giveup_match_end = 1; | |
3611 | break; | |
3612 | } | |
3613 | ||
3d0387c0 | 3614 | bufpos = 0; |
ec7adf26 | 3615 | while (bufpos < nread && same_at_start < ZV_BYTE |
6fdaa9a0 | 3616 | && FETCH_BYTE (same_at_start) == buffer[bufpos]) |
3d0387c0 RS |
3617 | same_at_start++, bufpos++; |
3618 | /* If we found a discrepancy, stop the scan. | |
8e6208c5 | 3619 | Otherwise loop around and scan the next bufferful. */ |
3d0387c0 RS |
3620 | if (bufpos != nread) |
3621 | break; | |
3622 | } | |
3623 | immediate_quit = 0; | |
3624 | /* If the file matches the buffer completely, | |
3625 | there's no need to replace anything. */ | |
2ba8e008 | 3626 | if (same_at_start - BEGV_BYTE == end_offset - beg_offset) |
3d0387c0 | 3627 | { |
68c45bf0 | 3628 | emacs_close (fd); |
a1d2b64a | 3629 | specpdl_ptr--; |
1051b3b3 | 3630 | /* Truncate the buffer to the size of the file. */ |
7dae4502 | 3631 | del_range_1 (same_at_start, same_at_end, 0, 0); |
3d0387c0 RS |
3632 | goto handled; |
3633 | } | |
3634 | immediate_quit = 1; | |
3635 | QUIT; | |
3636 | /* Count how many chars at the end of the file | |
6fdaa9a0 KH |
3637 | match the text at the end of the buffer. But, if we have |
3638 | already found that decoding is necessary, don't waste time. */ | |
3639 | while (!giveup_match_end) | |
3d0387c0 | 3640 | { |
728f8f0a PE |
3641 | int total_read, nread, bufpos, trial; |
3642 | off_t curpos; | |
3d0387c0 RS |
3643 | |
3644 | /* At what file position are we now scanning? */ | |
728f8f0a | 3645 | curpos = end_offset - (ZV_BYTE - same_at_end); |
fc81fa9e KH |
3646 | /* If the entire file matches the buffer tail, stop the scan. */ |
3647 | if (curpos == 0) | |
3648 | break; | |
3d0387c0 RS |
3649 | /* How much can we scan in the next step? */ |
3650 | trial = min (curpos, sizeof buffer); | |
728f8f0a | 3651 | if (lseek (fd, curpos - trial, SEEK_SET) < 0) |
3d0387c0 | 3652 | report_file_error ("Setting file position", |
b1d1b865 | 3653 | Fcons (orig_filename, Qnil)); |
3d0387c0 | 3654 | |
b02439c8 | 3655 | total_read = nread = 0; |
3d0387c0 RS |
3656 | while (total_read < trial) |
3657 | { | |
68c45bf0 | 3658 | nread = emacs_read (fd, buffer + total_read, trial - total_read); |
2bd2273e | 3659 | if (nread < 0) |
3d0387c0 | 3660 | error ("IO error reading %s: %s", |
d5db4077 | 3661 | SDATA (orig_filename), emacs_strerror (errno)); |
2bd2273e GM |
3662 | else if (nread == 0) |
3663 | break; | |
3d0387c0 RS |
3664 | total_read += nread; |
3665 | } | |
efdc16c9 | 3666 | |
8e6208c5 | 3667 | /* Scan this bufferful from the end, comparing with |
3d0387c0 RS |
3668 | the Emacs buffer. */ |
3669 | bufpos = total_read; | |
efdc16c9 | 3670 | |
3d0387c0 RS |
3671 | /* Compare with same_at_start to avoid counting some buffer text |
3672 | as matching both at the file's beginning and at the end. */ | |
3673 | while (bufpos > 0 && same_at_end > same_at_start | |
6fdaa9a0 | 3674 | && FETCH_BYTE (same_at_end - 1) == buffer[bufpos - 1]) |
3d0387c0 | 3675 | same_at_end--, bufpos--; |
727a0b4a | 3676 | |
3d0387c0 | 3677 | /* If we found a discrepancy, stop the scan. |
8e6208c5 | 3678 | Otherwise loop around and scan the preceding bufferful. */ |
3d0387c0 | 3679 | if (bufpos != 0) |
727a0b4a RS |
3680 | { |
3681 | /* If this discrepancy is because of code conversion, | |
3682 | we cannot use this method; giveup and try the other. */ | |
3683 | if (same_at_end > same_at_start | |
3684 | && FETCH_BYTE (same_at_end - 1) >= 0200 | |
4b4deea2 | 3685 | && ! NILP (BVAR (current_buffer, enable_multibyte_characters)) |
c8a6d68a | 3686 | && (CODING_MAY_REQUIRE_DECODING (&coding))) |
727a0b4a RS |
3687 | giveup_match_end = 1; |
3688 | break; | |
3689 | } | |
b02439c8 GM |
3690 | |
3691 | if (nread == 0) | |
3692 | break; | |
3d0387c0 RS |
3693 | } |
3694 | immediate_quit = 0; | |
9c28748f | 3695 | |
727a0b4a RS |
3696 | if (! giveup_match_end) |
3697 | { | |
d311d28c | 3698 | ptrdiff_t temp; |
ec7adf26 | 3699 | |
727a0b4a | 3700 | /* We win! We can handle REPLACE the optimized way. */ |
9c28748f | 3701 | |
20f6783d RS |
3702 | /* Extend the start of non-matching text area to multibyte |
3703 | character boundary. */ | |
4b4deea2 | 3704 | if (! NILP (BVAR (current_buffer, enable_multibyte_characters))) |
20f6783d RS |
3705 | while (same_at_start > BEGV_BYTE |
3706 | && ! CHAR_HEAD_P (FETCH_BYTE (same_at_start))) | |
3707 | same_at_start--; | |
3708 | ||
3709 | /* Extend the end of non-matching text area to multibyte | |
71312b68 | 3710 | character boundary. */ |
4b4deea2 | 3711 | if (! NILP (BVAR (current_buffer, enable_multibyte_characters))) |
ec7adf26 RS |
3712 | while (same_at_end < ZV_BYTE |
3713 | && ! CHAR_HEAD_P (FETCH_BYTE (same_at_end))) | |
71312b68 RS |
3714 | same_at_end++; |
3715 | ||
727a0b4a | 3716 | /* Don't try to reuse the same piece of text twice. */ |
ec7adf26 | 3717 | overlap = (same_at_start - BEGV_BYTE |
728f8f0a PE |
3718 | - (same_at_end |
3719 | + (! NILP (end) ? end_offset : st.st_size) - ZV_BYTE)); | |
727a0b4a RS |
3720 | if (overlap > 0) |
3721 | same_at_end += overlap; | |
9c28748f | 3722 | |
727a0b4a | 3723 | /* Arrange to read only the nonmatching middle part of the file. */ |
728f8f0a PE |
3724 | beg_offset += same_at_start - BEGV_BYTE; |
3725 | end_offset -= ZV_BYTE - same_at_end; | |
3dbcf3f6 | 3726 | |
ec7adf26 | 3727 | del_range_byte (same_at_start, same_at_end, 0); |
727a0b4a | 3728 | /* Insert from the file at the proper position. */ |
ec7adf26 RS |
3729 | temp = BYTE_TO_CHAR (same_at_start); |
3730 | SET_PT_BOTH (temp, same_at_start); | |
727a0b4a RS |
3731 | |
3732 | /* If display currently starts at beginning of line, | |
3733 | keep it that way. */ | |
3a45383a | 3734 | if (XBUFFER (WVAR (XWINDOW (selected_window), buffer)) == current_buffer) |
c98ff5dd | 3735 | XWINDOW (selected_window)->start_at_line_beg = !NILP (Fbolp ()); |
727a0b4a RS |
3736 | |
3737 | replace_handled = 1; | |
3738 | } | |
3dbcf3f6 RS |
3739 | } |
3740 | ||
3741 | /* If requested, replace the accessible part of the buffer | |
3742 | with the file contents. Avoid replacing text at the | |
3743 | beginning or end of the buffer that matches the file contents; | |
3744 | that preserves markers pointing to the unchanged parts. | |
3745 | ||
3746 | Here we implement this feature for the case where code conversion | |
3747 | is needed, in a simple way that needs a lot of memory. | |
3748 | The preceding if-statement handles the case of no conversion | |
3749 | in a more optimized way. */ | |
f736ffbf | 3750 | if (!NILP (replace) && ! replace_handled && BEGV < ZV) |
3dbcf3f6 | 3751 | { |
d311d28c PE |
3752 | ptrdiff_t same_at_start = BEGV_BYTE; |
3753 | ptrdiff_t same_at_end = ZV_BYTE; | |
3754 | ptrdiff_t same_at_start_charpos; | |
3755 | ptrdiff_t inserted_chars; | |
3756 | ptrdiff_t overlap; | |
3757 | ptrdiff_t bufpos; | |
db327c7e | 3758 | unsigned char *decoded; |
d311d28c PE |
3759 | ptrdiff_t temp; |
3760 | ptrdiff_t this = 0; | |
3761 | ptrdiff_t this_count = SPECPDL_INDEX (); | |
4b4deea2 | 3762 | int multibyte = ! NILP (BVAR (current_buffer, enable_multibyte_characters)); |
5b359650 | 3763 | Lisp_Object conversion_buffer; |
83aca1cb | 3764 | struct gcpro gcpro1; |
db327c7e | 3765 | |
5b359650 | 3766 | conversion_buffer = code_conversion_save (1, multibyte); |
3dbcf3f6 RS |
3767 | |
3768 | /* First read the whole file, performing code conversion into | |
3769 | CONVERSION_BUFFER. */ | |
3770 | ||
728f8f0a | 3771 | if (lseek (fd, beg_offset, SEEK_SET) < 0) |
8f924df7 KH |
3772 | report_file_error ("Setting file position", |
3773 | Fcons (orig_filename, Qnil)); | |
727a0b4a | 3774 | |
3dbcf3f6 RS |
3775 | total = st.st_size; /* Total bytes in the file. */ |
3776 | how_much = 0; /* Bytes read from file so far. */ | |
3777 | inserted = 0; /* Bytes put into CONVERSION_BUFFER so far. */ | |
3778 | unprocessed = 0; /* Bytes not processed in previous loop. */ | |
3779 | ||
2ba48777 | 3780 | GCPRO1 (conversion_buffer); |
3dbcf3f6 RS |
3781 | while (how_much < total) |
3782 | { | |
db327c7e KH |
3783 | /* We read one bunch by one (READ_BUF_SIZE bytes) to allow |
3784 | quitting while reading a huge while. */ | |
a5bb9bd3 | 3785 | /* `try'' is reserved in some compilers (Microsoft C). */ |
d311d28c | 3786 | int trytry = min (total - how_much, READ_BUF_SIZE - unprocessed); |
3dbcf3f6 RS |
3787 | |
3788 | /* Allow quitting out of the actual I/O. */ | |
3789 | immediate_quit = 1; | |
3790 | QUIT; | |
db327c7e | 3791 | this = emacs_read (fd, read_buf + unprocessed, trytry); |
3dbcf3f6 RS |
3792 | immediate_quit = 0; |
3793 | ||
db327c7e | 3794 | if (this <= 0) |
43aae36e | 3795 | break; |
3dbcf3f6 RS |
3796 | |
3797 | how_much += this; | |
3798 | ||
bf1c0f27 SM |
3799 | BUF_TEMP_SET_PT (XBUFFER (conversion_buffer), |
3800 | BUF_Z (XBUFFER (conversion_buffer))); | |
5976c3fe PE |
3801 | decode_coding_c_string (&coding, (unsigned char *) read_buf, |
3802 | unprocessed + this, conversion_buffer); | |
db327c7e KH |
3803 | unprocessed = coding.carryover_bytes; |
3804 | if (coding.carryover_bytes > 0) | |
72af86bd | 3805 | memcpy (read_buf, coding.carryover, unprocessed); |
3dbcf3f6 | 3806 | } |
2ba48777 | 3807 | UNGCPRO; |
db327c7e | 3808 | emacs_close (fd); |
3dbcf3f6 | 3809 | |
db65a627 CY |
3810 | /* We should remove the unwind_protect calling |
3811 | close_file_unwind, but other stuff has been added the stack, | |
3812 | so defer the removal till we reach the `handled' label. */ | |
3813 | deferred_remove_unwind_protect = 1; | |
3814 | ||
db327c7e KH |
3815 | /* At this point, HOW_MUCH should equal TOTAL, or should be <= 0 |
3816 | if we couldn't read the file. */ | |
3dbcf3f6 | 3817 | |
43aae36e | 3818 | if (this < 0) |
4ed925c6 MB |
3819 | error ("IO error reading %s: %s", |
3820 | SDATA (orig_filename), emacs_strerror (errno)); | |
3dbcf3f6 | 3821 | |
db327c7e KH |
3822 | if (unprocessed > 0) |
3823 | { | |
3824 | coding.mode |= CODING_MODE_LAST_BLOCK; | |
5976c3fe PE |
3825 | decode_coding_c_string (&coding, (unsigned char *) read_buf, |
3826 | unprocessed, conversion_buffer); | |
db327c7e KH |
3827 | coding.mode &= ~CODING_MODE_LAST_BLOCK; |
3828 | } | |
3829 | ||
50b06221 | 3830 | coding_system = CODING_ID_NAME (coding.id); |
f6a07420 | 3831 | set_coding_system = 1; |
db327c7e | 3832 | decoded = BUF_BEG_ADDR (XBUFFER (conversion_buffer)); |
50342b35 KH |
3833 | inserted = (BUF_Z_BYTE (XBUFFER (conversion_buffer)) |
3834 | - BUF_BEG_BYTE (XBUFFER (conversion_buffer))); | |
db327c7e KH |
3835 | |
3836 | /* Compare the beginning of the converted string with the buffer | |
3837 | text. */ | |
3dbcf3f6 RS |
3838 | |
3839 | bufpos = 0; | |
3840 | while (bufpos < inserted && same_at_start < same_at_end | |
db327c7e | 3841 | && FETCH_BYTE (same_at_start) == decoded[bufpos]) |
3dbcf3f6 RS |
3842 | same_at_start++, bufpos++; |
3843 | ||
db327c7e | 3844 | /* If the file matches the head of buffer completely, |
3dbcf3f6 RS |
3845 | there's no need to replace anything. */ |
3846 | ||
3847 | if (bufpos == inserted) | |
3848 | { | |
3dbcf3f6 | 3849 | /* Truncate the buffer to the size of the file. */ |
18a9f8d9 SM |
3850 | if (same_at_start == same_at_end) |
3851 | nochange = 1; | |
3852 | else | |
3853 | del_range_byte (same_at_start, same_at_end, 0); | |
427f5aab | 3854 | inserted = 0; |
e8553dd1 KH |
3855 | |
3856 | unbind_to (this_count, Qnil); | |
3dbcf3f6 RS |
3857 | goto handled; |
3858 | } | |
3859 | ||
db327c7e KH |
3860 | /* Extend the start of non-matching text area to the previous |
3861 | multibyte character boundary. */ | |
4b4deea2 | 3862 | if (! NILP (BVAR (current_buffer, enable_multibyte_characters))) |
20f6783d RS |
3863 | while (same_at_start > BEGV_BYTE |
3864 | && ! CHAR_HEAD_P (FETCH_BYTE (same_at_start))) | |
3865 | same_at_start--; | |
3866 | ||
3dbcf3f6 RS |
3867 | /* Scan this bufferful from the end, comparing with |
3868 | the Emacs buffer. */ | |
3869 | bufpos = inserted; | |
3870 | ||
3871 | /* Compare with same_at_start to avoid counting some buffer text | |
3872 | as matching both at the file's beginning and at the end. */ | |
3873 | while (bufpos > 0 && same_at_end > same_at_start | |
db327c7e | 3874 | && FETCH_BYTE (same_at_end - 1) == decoded[bufpos - 1]) |
3dbcf3f6 RS |
3875 | same_at_end--, bufpos--; |
3876 | ||
db327c7e KH |
3877 | /* Extend the end of non-matching text area to the next |
3878 | multibyte character boundary. */ | |
4b4deea2 | 3879 | if (! NILP (BVAR (current_buffer, enable_multibyte_characters))) |
20f6783d RS |
3880 | while (same_at_end < ZV_BYTE |
3881 | && ! CHAR_HEAD_P (FETCH_BYTE (same_at_end))) | |
3882 | same_at_end++; | |
3883 | ||
3dbcf3f6 | 3884 | /* Don't try to reuse the same piece of text twice. */ |
ec7adf26 | 3885 | overlap = same_at_start - BEGV_BYTE - (same_at_end + inserted - ZV_BYTE); |
3dbcf3f6 RS |
3886 | if (overlap > 0) |
3887 | same_at_end += overlap; | |
3888 | ||
727a0b4a RS |
3889 | /* If display currently starts at beginning of line, |
3890 | keep it that way. */ | |
3a45383a | 3891 | if (XBUFFER (WVAR (XWINDOW (selected_window), buffer)) == current_buffer) |
c98ff5dd | 3892 | XWINDOW (selected_window)->start_at_line_beg = !NILP (Fbolp ()); |
727a0b4a | 3893 | |
3dbcf3f6 RS |
3894 | /* Replace the chars that we need to replace, |
3895 | and update INSERTED to equal the number of bytes | |
db327c7e | 3896 | we are taking from the decoded string. */ |
4b70e2c9 | 3897 | inserted -= (ZV_BYTE - same_at_end) + (same_at_start - BEGV_BYTE); |
427f5aab | 3898 | |
643c73b9 | 3899 | if (same_at_end != same_at_start) |
427f5aab KH |
3900 | { |
3901 | del_range_byte (same_at_start, same_at_end, 0); | |
3902 | temp = GPT; | |
3903 | same_at_start = GPT_BYTE; | |
3904 | } | |
643c73b9 RS |
3905 | else |
3906 | { | |
643c73b9 | 3907 | temp = BYTE_TO_CHAR (same_at_start); |
643c73b9 | 3908 | } |
427f5aab KH |
3909 | /* Insert from the file at the proper position. */ |
3910 | SET_PT_BOTH (temp, same_at_start); | |
50342b35 KH |
3911 | same_at_start_charpos |
3912 | = buf_bytepos_to_charpos (XBUFFER (conversion_buffer), | |
7f5d2c72 SM |
3913 | same_at_start - BEGV_BYTE |
3914 | + BUF_BEG_BYTE (XBUFFER (conversion_buffer))); | |
50342b35 KH |
3915 | inserted_chars |
3916 | = (buf_bytepos_to_charpos (XBUFFER (conversion_buffer), | |
7f5d2c72 SM |
3917 | same_at_start + inserted - BEGV_BYTE |
3918 | + BUF_BEG_BYTE (XBUFFER (conversion_buffer))) | |
50342b35 | 3919 | - same_at_start_charpos); |
d07af40d KH |
3920 | /* This binding is to avoid ask-user-about-supersession-threat |
3921 | being called in insert_from_buffer (via in | |
3922 | prepare_to_modify_buffer). */ | |
3923 | specbind (intern ("buffer-file-name"), Qnil); | |
db327c7e | 3924 | insert_from_buffer (XBUFFER (conversion_buffer), |
50342b35 | 3925 | same_at_start_charpos, inserted_chars, 0); |
427f5aab KH |
3926 | /* Set `inserted' to the number of inserted characters. */ |
3927 | inserted = PT - temp; | |
77343e1d KH |
3928 | /* Set point before the inserted characters. */ |
3929 | SET_PT_BOTH (temp, same_at_start); | |
3dbcf3f6 | 3930 | |
db327c7e | 3931 | unbind_to (this_count, Qnil); |
3dbcf3f6 | 3932 | |
3dbcf3f6 | 3933 | goto handled; |
3d0387c0 RS |
3934 | } |
3935 | ||
d4b8687b | 3936 | if (! not_regular) |
728f8f0a | 3937 | total = end_offset - beg_offset; |
d4b8687b RS |
3938 | else |
3939 | /* For a special file, all we can do is guess. */ | |
3940 | total = READ_BUF_SIZE; | |
570d7624 | 3941 | |
8b913b57 | 3942 | if (NILP (visit) && total > 0) |
68780e2a RS |
3943 | { |
3944 | #ifdef CLASH_DETECTION | |
4b4deea2 | 3945 | if (!NILP (BVAR (current_buffer, file_truename)) |
68780e2a | 3946 | /* Make binding buffer-file-name to nil effective. */ |
4b4deea2 | 3947 | && !NILP (BVAR (current_buffer, filename)) |
68780e2a RS |
3948 | && SAVE_MODIFF >= MODIFF) |
3949 | we_locked_file = 1; | |
3950 | #endif /* CLASH_DETECTION */ | |
3951 | prepare_to_modify_buffer (GPT, GPT, NULL); | |
3952 | } | |
570d7624 | 3953 | |
7fe52289 | 3954 | move_gap (PT); |
7fded690 JB |
3955 | if (GAP_SIZE < total) |
3956 | make_gap (total - GAP_SIZE); | |
3957 | ||
728f8f0a | 3958 | if (beg_offset != 0 || !NILP (replace)) |
7fded690 | 3959 | { |
728f8f0a | 3960 | if (lseek (fd, beg_offset, SEEK_SET) < 0) |
b1d1b865 RS |
3961 | report_file_error ("Setting file position", |
3962 | Fcons (orig_filename, Qnil)); | |
7fded690 JB |
3963 | } |
3964 | ||
6fdaa9a0 | 3965 | /* In the following loop, HOW_MUCH contains the total bytes read so |
c8a6d68a KH |
3966 | far for a regular file, and not changed for a special file. But, |
3967 | before exiting the loop, it is set to a negative value if I/O | |
3968 | error occurs. */ | |
a1d2b64a | 3969 | how_much = 0; |
efdc16c9 | 3970 | |
6fdaa9a0 KH |
3971 | /* Total bytes inserted. */ |
3972 | inserted = 0; | |
efdc16c9 | 3973 | |
c8a6d68a | 3974 | /* Here, we don't do code conversion in the loop. It is done by |
db327c7e | 3975 | decode_coding_gap after all data are read into the buffer. */ |
1b978129 | 3976 | { |
d311d28c | 3977 | ptrdiff_t gap_size = GAP_SIZE; |
efdc16c9 | 3978 | |
1b978129 GM |
3979 | while (how_much < total) |
3980 | { | |
5e570b75 | 3981 | /* try is reserved in some compilers (Microsoft C) */ |
d311d28c PE |
3982 | int trytry = min (total - how_much, READ_BUF_SIZE); |
3983 | ptrdiff_t this; | |
570d7624 | 3984 | |
1b978129 GM |
3985 | if (not_regular) |
3986 | { | |
f839df0c | 3987 | Lisp_Object nbytes; |
570d7624 | 3988 | |
1b978129 GM |
3989 | /* Maybe make more room. */ |
3990 | if (gap_size < trytry) | |
3991 | { | |
3992 | make_gap (total - gap_size); | |
3993 | gap_size = GAP_SIZE; | |
3994 | } | |
3995 | ||
3996 | /* Read from the file, capturing `quit'. When an | |
3997 | error occurs, end the loop, and arrange for a quit | |
3998 | to be signaled after decoding the text we read. */ | |
3999 | non_regular_fd = fd; | |
4000 | non_regular_inserted = inserted; | |
4001 | non_regular_nbytes = trytry; | |
f839df0c PE |
4002 | nbytes = internal_condition_case_1 (read_non_regular, |
4003 | Qnil, Qerror, | |
4004 | read_non_regular_quit); | |
4005 | if (NILP (nbytes)) | |
1b978129 GM |
4006 | { |
4007 | read_quit = 1; | |
4008 | break; | |
4009 | } | |
4010 | ||
f839df0c | 4011 | this = XINT (nbytes); |
1b978129 GM |
4012 | } |
4013 | else | |
4014 | { | |
4015 | /* Allow quitting out of the actual I/O. We don't make text | |
4016 | part of the buffer until all the reading is done, so a C-g | |
4017 | here doesn't do any harm. */ | |
4018 | immediate_quit = 1; | |
4019 | QUIT; | |
5976c3fe PE |
4020 | this = emacs_read (fd, |
4021 | ((char *) BEG_ADDR + PT_BYTE - BEG_BYTE | |
4022 | + inserted), | |
4023 | trytry); | |
1b978129 GM |
4024 | immediate_quit = 0; |
4025 | } | |
efdc16c9 | 4026 | |
1b978129 GM |
4027 | if (this <= 0) |
4028 | { | |
4029 | how_much = this; | |
4030 | break; | |
4031 | } | |
4032 | ||
4033 | gap_size -= this; | |
4034 | ||
4035 | /* For a regular file, where TOTAL is the real size, | |
4036 | count HOW_MUCH to compare with it. | |
4037 | For a special file, where TOTAL is just a buffer size, | |
4038 | so don't bother counting in HOW_MUCH. | |
4039 | (INSERTED is where we count the number of characters inserted.) */ | |
4040 | if (! not_regular) | |
4041 | how_much += this; | |
4042 | inserted += this; | |
4043 | } | |
4044 | } | |
4045 | ||
68780e2a RS |
4046 | /* Now we have read all the file data into the gap. |
4047 | If it was empty, undo marking the buffer modified. */ | |
4048 | ||
4049 | if (inserted == 0) | |
4050 | { | |
6840d350 | 4051 | #ifdef CLASH_DETECTION |
68780e2a | 4052 | if (we_locked_file) |
4b4deea2 | 4053 | unlock_file (BVAR (current_buffer, file_truename)); |
6840d350 | 4054 | #endif |
68780e2a RS |
4055 | Vdeactivate_mark = old_Vdeactivate_mark; |
4056 | } | |
83c1cf6d RS |
4057 | else |
4058 | Vdeactivate_mark = Qt; | |
68780e2a | 4059 | |
1b978129 GM |
4060 | /* Make the text read part of the buffer. */ |
4061 | GAP_SIZE -= inserted; | |
4062 | GPT += inserted; | |
4063 | GPT_BYTE += inserted; | |
4064 | ZV += inserted; | |
4065 | ZV_BYTE += inserted; | |
4066 | Z += inserted; | |
4067 | Z_BYTE += inserted; | |
6fdaa9a0 | 4068 | |
c8a6d68a KH |
4069 | if (GAP_SIZE > 0) |
4070 | /* Put an anchor to ensure multi-byte form ends at gap. */ | |
4071 | *GPT_ADDR = 0; | |
d4b8687b | 4072 | |
68c45bf0 | 4073 | emacs_close (fd); |
6fdaa9a0 | 4074 | |
c8a6d68a KH |
4075 | /* Discard the unwind protect for closing the file. */ |
4076 | specpdl_ptr--; | |
6fdaa9a0 | 4077 | |
c8a6d68a KH |
4078 | if (how_much < 0) |
4079 | error ("IO error reading %s: %s", | |
d5db4077 | 4080 | SDATA (orig_filename), emacs_strerror (errno)); |
ec7adf26 | 4081 | |
f8569325 DL |
4082 | notfound: |
4083 | ||
db327c7e | 4084 | if (NILP (coding_system)) |
c8a6d68a | 4085 | { |
2df42e09 | 4086 | /* The coding system is not yet decided. Decide it by an |
dfe35e7b RS |
4087 | optimized method for handling `coding:' tag. |
4088 | ||
4089 | Note that we can get here only if the buffer was empty | |
4090 | before the insertion. */ | |
f736ffbf | 4091 | |
2df42e09 | 4092 | if (!NILP (Vcoding_system_for_read)) |
db327c7e | 4093 | coding_system = Vcoding_system_for_read; |
2df42e09 KH |
4094 | else |
4095 | { | |
98a7d268 KH |
4096 | /* Since we are sure that the current buffer was empty |
4097 | before the insertion, we can toggle | |
4098 | enable-multibyte-characters directly here without taking | |
9a7f80aa KH |
4099 | care of marker adjustment. By this way, we can run Lisp |
4100 | program safely before decoding the inserted text. */ | |
98a7d268 | 4101 | Lisp_Object unwind_data; |
d311d28c | 4102 | ptrdiff_t count1 = SPECPDL_INDEX (); |
2df42e09 | 4103 | |
4b4deea2 TT |
4104 | unwind_data = Fcons (BVAR (current_buffer, enable_multibyte_characters), |
4105 | Fcons (BVAR (current_buffer, undo_list), | |
98a7d268 | 4106 | Fcurrent_buffer ())); |
4b4deea2 TT |
4107 | BVAR (current_buffer, enable_multibyte_characters) = Qnil; |
4108 | BVAR (current_buffer, undo_list) = Qt; | |
98a7d268 KH |
4109 | record_unwind_protect (decide_coding_unwind, unwind_data); |
4110 | ||
4111 | if (inserted > 0 && ! NILP (Vset_auto_coding_function)) | |
4112 | { | |
db327c7e | 4113 | coding_system = call2 (Vset_auto_coding_function, |
8f924df7 | 4114 | filename, make_number (inserted)); |
2df42e09 | 4115 | } |
f736ffbf | 4116 | |
db327c7e | 4117 | if (NILP (coding_system)) |
2df42e09 KH |
4118 | { |
4119 | /* If the coding system is not yet decided, check | |
4120 | file-coding-system-alist. */ | |
8f924df7 | 4121 | Lisp_Object args[6]; |
f736ffbf | 4122 | |
2df42e09 KH |
4123 | args[0] = Qinsert_file_contents, args[1] = orig_filename; |
4124 | args[2] = visit, args[3] = beg, args[4] = end, args[5] = Qnil; | |
8f924df7 KH |
4125 | coding_system = Ffind_operation_coding_system (6, args); |
4126 | if (CONSP (coding_system)) | |
4127 | coding_system = XCAR (coding_system); | |
f736ffbf | 4128 | } |
f839df0c | 4129 | unbind_to (count1, Qnil); |
98a7d268 | 4130 | inserted = Z_BYTE - BEG_BYTE; |
2df42e09 | 4131 | } |
f736ffbf | 4132 | |
db327c7e KH |
4133 | if (NILP (coding_system)) |
4134 | coding_system = Qundecided; | |
4135 | else | |
4136 | CHECK_CODING_SYSTEM (coding_system); | |
f736ffbf | 4137 | |
4b4deea2 | 4138 | if (NILP (BVAR (current_buffer, enable_multibyte_characters))) |
237a6fd2 | 4139 | /* We must suppress all character code conversion except for |
2df42e09 | 4140 | end-of-line conversion. */ |
db327c7e | 4141 | coding_system = raw_text_coding_system (coding_system); |
db327c7e KH |
4142 | setup_coding_system (coding_system, &coding); |
4143 | /* Ensure we set Vlast_coding_system_used. */ | |
4144 | set_coding_system = 1; | |
2df42e09 | 4145 | } |
f736ffbf | 4146 | |
db327c7e | 4147 | if (!NILP (visit)) |
8c3b9441 | 4148 | { |
db327c7e | 4149 | /* When we visit a file by raw-text, we change the buffer to |
9a7f80aa | 4150 | unibyte. */ |
db327c7e KH |
4151 | if (CODING_FOR_UNIBYTE (&coding) |
4152 | /* Can't do this if part of the buffer might be preserved. */ | |
4153 | && NILP (replace)) | |
4154 | /* Visiting a file with these coding system makes the buffer | |
4155 | unibyte. */ | |
4b4deea2 | 4156 | BVAR (current_buffer, enable_multibyte_characters) = Qnil; |
8c3b9441 KH |
4157 | } |
4158 | ||
4b4deea2 | 4159 | coding.dst_multibyte = ! NILP (BVAR (current_buffer, enable_multibyte_characters)); |
5b359650 | 4160 | if (CODING_MAY_REQUIRE_DECODING (&coding) |
1c157f8d | 4161 | && (inserted > 0 || CODING_REQUIRE_FLUSHING (&coding))) |
2df42e09 | 4162 | { |
db327c7e KH |
4163 | move_gap_both (PT, PT_BYTE); |
4164 | GAP_SIZE += inserted; | |
4165 | ZV_BYTE -= inserted; | |
4166 | Z_BYTE -= inserted; | |
4167 | ZV -= inserted; | |
4168 | Z -= inserted; | |
4169 | decode_coding_gap (&coding, inserted, inserted); | |
4170 | inserted = coding.produced_char; | |
5b359650 | 4171 | coding_system = CODING_ID_NAME (coding.id); |
2df42e09 | 4172 | } |
db327c7e KH |
4173 | else if (inserted > 0) |
4174 | adjust_after_insert (PT, PT_BYTE, PT + inserted, PT_BYTE + inserted, | |
4175 | inserted); | |
570d7624 | 4176 | |
0068070e SM |
4177 | /* Call after-change hooks for the inserted text, aside from the case |
4178 | of normal visiting (not with REPLACE), which is done in a new buffer | |
4179 | "before" the buffer is changed. */ | |
4180 | if (inserted > 0 && total > 0 | |
4181 | && (NILP (visit) || !NILP (replace))) | |
4182 | { | |
4183 | signal_after_change (PT, 0, inserted); | |
4184 | update_compositions (PT, PT, CHECK_BORDER); | |
4185 | } | |
4186 | ||
cf6d2357 RS |
4187 | /* Now INSERTED is measured in characters. */ |
4188 | ||
32f4334d | 4189 | handled: |
570d7624 | 4190 | |
db65a627 CY |
4191 | if (deferred_remove_unwind_protect) |
4192 | /* If requested above, discard the unwind protect for closing the | |
4193 | file. */ | |
4194 | specpdl_ptr--; | |
4195 | ||
265a9e55 | 4196 | if (!NILP (visit)) |
570d7624 | 4197 | { |
4b4deea2 TT |
4198 | if (!EQ (BVAR (current_buffer, undo_list), Qt) && !nochange) |
4199 | BVAR (current_buffer, undo_list) = Qnil; | |
62bcf009 | 4200 | |
a7e82472 RS |
4201 | if (NILP (handler)) |
4202 | { | |
dbeed9a6 | 4203 | current_buffer->modtime = mtime; |
58b963f7 | 4204 | current_buffer->modtime_size = st.st_size; |
4b4deea2 | 4205 | BVAR (current_buffer, filename) = orig_filename; |
a7e82472 | 4206 | } |
62bcf009 | 4207 | |
95385625 | 4208 | SAVE_MODIFF = MODIFF; |
0b5397c2 | 4209 | BUF_AUTOSAVE_MODIFF (current_buffer) = MODIFF; |
4b4deea2 | 4210 | XSETFASTINT (BVAR (current_buffer, save_length), Z - BEG); |
570d7624 | 4211 | #ifdef CLASH_DETECTION |
32f4334d RS |
4212 | if (NILP (handler)) |
4213 | { | |
4b4deea2 TT |
4214 | if (!NILP (BVAR (current_buffer, file_truename))) |
4215 | unlock_file (BVAR (current_buffer, file_truename)); | |
32f4334d RS |
4216 | unlock_file (filename); |
4217 | } | |
570d7624 | 4218 | #endif /* CLASH_DETECTION */ |
330bfe57 | 4219 | if (not_regular) |
24b1ddad KS |
4220 | xsignal2 (Qfile_error, |
4221 | build_string ("not a regular file"), orig_filename); | |
570d7624 JB |
4222 | } |
4223 | ||
b6426b03 | 4224 | if (set_coding_system) |
8f924df7 | 4225 | Vlast_coding_system_used = coding_system; |
b6426b03 | 4226 | |
2080470e | 4227 | if (! NILP (Ffboundp (Qafter_insert_file_set_coding))) |
b6426b03 | 4228 | { |
37a3c774 KH |
4229 | insval = call2 (Qafter_insert_file_set_coding, make_number (inserted), |
4230 | visit); | |
b6426b03 KH |
4231 | if (! NILP (insval)) |
4232 | { | |
d311d28c PE |
4233 | if (! RANGED_INTEGERP (0, insval, ZV - PT)) |
4234 | wrong_type_argument (intern ("inserted-chars"), insval); | |
b6426b03 KH |
4235 | inserted = XFASTINT (insval); |
4236 | } | |
4237 | } | |
4238 | ||
6420e80c | 4239 | /* Decode file format. */ |
c8a6d68a | 4240 | if (inserted > 0) |
0d420e88 | 4241 | { |
6420e80c | 4242 | /* Don't run point motion or modification hooks when decoding. */ |
d311d28c PE |
4243 | ptrdiff_t count1 = SPECPDL_INDEX (); |
4244 | ptrdiff_t old_inserted = inserted; | |
6f2528d8 MR |
4245 | specbind (Qinhibit_point_motion_hooks, Qt); |
4246 | specbind (Qinhibit_modification_hooks, Qt); | |
4247 | ||
6420e80c | 4248 | /* Save old undo list and don't record undo for decoding. */ |
4b4deea2 TT |
4249 | old_undo = BVAR (current_buffer, undo_list); |
4250 | BVAR (current_buffer, undo_list) = Qt; | |
efdc16c9 | 4251 | |
6f2528d8 | 4252 | if (NILP (replace)) |
ed8e506f | 4253 | { |
6f2528d8 MR |
4254 | insval = call3 (Qformat_decode, |
4255 | Qnil, make_number (inserted), visit); | |
d311d28c PE |
4256 | if (! RANGED_INTEGERP (0, insval, ZV - PT)) |
4257 | wrong_type_argument (intern ("inserted-chars"), insval); | |
6f2528d8 MR |
4258 | inserted = XFASTINT (insval); |
4259 | } | |
4260 | else | |
4261 | { | |
4262 | /* If REPLACE is non-nil and we succeeded in not replacing the | |
6420e80c AS |
4263 | beginning or end of the buffer text with the file's contents, |
4264 | call format-decode with `point' positioned at the beginning | |
fa463103 | 4265 | of the buffer and `inserted' equaling the number of |
6420e80c AS |
4266 | characters in the buffer. Otherwise, format-decode might |
4267 | fail to correctly analyze the beginning or end of the buffer. | |
4268 | Hence we temporarily save `point' and `inserted' here and | |
4269 | restore `point' iff format-decode did not insert or delete | |
4270 | any text. Otherwise we leave `point' at point-min. */ | |
d311d28c PE |
4271 | ptrdiff_t opoint = PT; |
4272 | ptrdiff_t opoint_byte = PT_BYTE; | |
4273 | ptrdiff_t oinserted = ZV - BEGV; | |
4274 | EMACS_INT ochars_modiff = CHARS_MODIFF; | |
1f163f28 MA |
4275 | |
4276 | TEMP_SET_PT_BOTH (BEGV, BEGV_BYTE); | |
6f2528d8 MR |
4277 | insval = call3 (Qformat_decode, |
4278 | Qnil, make_number (oinserted), visit); | |
d311d28c PE |
4279 | if (! RANGED_INTEGERP (0, insval, ZV - PT)) |
4280 | wrong_type_argument (intern ("inserted-chars"), insval); | |
cac4219c MR |
4281 | if (ochars_modiff == CHARS_MODIFF) |
4282 | /* format_decode didn't modify buffer's characters => move | |
4283 | point back to position before inserted text and leave | |
6420e80c | 4284 | value of inserted alone. */ |
6f2528d8 | 4285 | SET_PT_BOTH (opoint, opoint_byte); |
cac4219c MR |
4286 | else |
4287 | /* format_decode modified buffer's characters => consider | |
6420e80c | 4288 | entire buffer changed and leave point at point-min. */ |
cac4219c | 4289 | inserted = XFASTINT (insval); |
ed8e506f | 4290 | } |
efdc16c9 | 4291 | |
6f2528d8 | 4292 | /* For consistency with format-decode call these now iff inserted > 0 |
6420e80c | 4293 | (martin 2007-06-28). */ |
6f2528d8 MR |
4294 | p = Vafter_insert_file_functions; |
4295 | while (CONSP (p)) | |
4296 | { | |
4297 | if (NILP (replace)) | |
4298 | { | |
4299 | insval = call1 (XCAR (p), make_number (inserted)); | |
4300 | if (!NILP (insval)) | |
4301 | { | |
d311d28c PE |
4302 | if (! RANGED_INTEGERP (0, insval, ZV - PT)) |
4303 | wrong_type_argument (intern ("inserted-chars"), insval); | |
6f2528d8 MR |
4304 | inserted = XFASTINT (insval); |
4305 | } | |
4306 | } | |
4307 | else | |
4308 | { | |
6420e80c AS |
4309 | /* For the rationale of this see the comment on |
4310 | format-decode above. */ | |
d311d28c PE |
4311 | ptrdiff_t opoint = PT; |
4312 | ptrdiff_t opoint_byte = PT_BYTE; | |
4313 | ptrdiff_t oinserted = ZV - BEGV; | |
4314 | EMACS_INT ochars_modiff = CHARS_MODIFF; | |
1f163f28 | 4315 | |
6f2528d8 MR |
4316 | TEMP_SET_PT_BOTH (BEGV, BEGV_BYTE); |
4317 | insval = call1 (XCAR (p), make_number (oinserted)); | |
4318 | if (!NILP (insval)) | |
4319 | { | |
d311d28c PE |
4320 | if (! RANGED_INTEGERP (0, insval, ZV - PT)) |
4321 | wrong_type_argument (intern ("inserted-chars"), insval); | |
cac4219c MR |
4322 | if (ochars_modiff == CHARS_MODIFF) |
4323 | /* after_insert_file_functions didn't modify | |
4324 | buffer's characters => move point back to | |
4325 | position before inserted text and leave value of | |
6420e80c | 4326 | inserted alone. */ |
6f2528d8 | 4327 | SET_PT_BOTH (opoint, opoint_byte); |
cac4219c MR |
4328 | else |
4329 | /* after_insert_file_functions did modify buffer's | |
4330 | characters => consider entire buffer changed and | |
6420e80c | 4331 | leave point at point-min. */ |
cac4219c | 4332 | inserted = XFASTINT (insval); |
6f2528d8 MR |
4333 | } |
4334 | } | |
4335 | ||
4336 | QUIT; | |
4337 | p = XCDR (p); | |
ed8e506f | 4338 | } |
efdc16c9 | 4339 | |
6f2528d8 MR |
4340 | if (NILP (visit)) |
4341 | { | |
4b4deea2 | 4342 | BVAR (current_buffer, undo_list) = old_undo; |
6420e80c | 4343 | if (CONSP (old_undo) && inserted != old_inserted) |
6f2528d8 | 4344 | { |
6420e80c AS |
4345 | /* Adjust the last undo record for the size change during |
4346 | the format conversion. */ | |
6f2528d8 | 4347 | Lisp_Object tem = XCAR (old_undo); |
6420e80c AS |
4348 | if (CONSP (tem) && INTEGERP (XCAR (tem)) |
4349 | && INTEGERP (XCDR (tem)) | |
4350 | && XFASTINT (XCDR (tem)) == PT + old_inserted) | |
4351 | XSETCDR (tem, make_number (PT + inserted)); | |
6f2528d8 MR |
4352 | } |
4353 | } | |
6f2528d8 | 4354 | else |
1bc99c9c | 4355 | /* If undo_list was Qt before, keep it that way. |
6420e80c | 4356 | Otherwise start with an empty undo_list. */ |
4b4deea2 | 4357 | BVAR (current_buffer, undo_list) = EQ (old_undo, Qt) ? Qt : Qnil; |
efdc16c9 | 4358 | |
f839df0c | 4359 | unbind_to (count1, Qnil); |
0d420e88 BG |
4360 | } |
4361 | ||
f8569325 | 4362 | if (!NILP (visit) |
d35af63c | 4363 | && EMACS_NSECS (current_buffer->modtime) == NONEXISTENT_MODTIME_NSECS) |
f8569325 DL |
4364 | { |
4365 | /* If visiting nonexistent file, return nil. */ | |
e5e9d610 | 4366 | errno = save_errno; |
f8569325 | 4367 | report_file_error ("Opening input file", Fcons (orig_filename, Qnil)); |
d6a3cc15 RS |
4368 | } |
4369 | ||
1b978129 GM |
4370 | if (read_quit) |
4371 | Fsignal (Qquit, Qnil); | |
4372 | ||
ec7adf26 | 4373 | /* ??? Retval needs to be dealt with in all cases consistently. */ |
a1d2b64a | 4374 | if (NILP (val)) |
b1d1b865 | 4375 | val = Fcons (orig_filename, |
a1d2b64a RS |
4376 | Fcons (make_number (inserted), |
4377 | Qnil)); | |
4378 | ||
4379 | RETURN_UNGCPRO (unbind_to (count, val)); | |
570d7624 | 4380 | } |
7fded690 | 4381 | \f |
f57e2426 | 4382 | static Lisp_Object build_annotations (Lisp_Object, Lisp_Object); |
d6a3cc15 | 4383 | |
199607e4 | 4384 | static Lisp_Object |
971de7fb | 4385 | build_annotations_unwind (Lisp_Object arg) |
6fc6f94b | 4386 | { |
67fbc0cb | 4387 | Vwrite_region_annotation_buffers = arg; |
6fc6f94b RS |
4388 | return Qnil; |
4389 | } | |
4390 | ||
7c82a4a9 SM |
4391 | /* Decide the coding-system to encode the data with. */ |
4392 | ||
c934586d | 4393 | static Lisp_Object |
dd4c5104 DN |
4394 | choose_write_coding_system (Lisp_Object start, Lisp_Object end, Lisp_Object filename, |
4395 | Lisp_Object append, Lisp_Object visit, Lisp_Object lockname, | |
4396 | struct coding_system *coding) | |
7c82a4a9 SM |
4397 | { |
4398 | Lisp_Object val; | |
75421805 | 4399 | Lisp_Object eol_parent = Qnil; |
7c82a4a9 | 4400 | |
6b61353c | 4401 | if (auto_saving |
4b4deea2 TT |
4402 | && NILP (Fstring_equal (BVAR (current_buffer, filename), |
4403 | BVAR (current_buffer, auto_save_file_name)))) | |
75421805 KH |
4404 | { |
4405 | val = Qutf_8_emacs; | |
4406 | eol_parent = Qunix; | |
4407 | } | |
7c82a4a9 | 4408 | else if (!NILP (Vcoding_system_for_write)) |
42b01e1e KH |
4409 | { |
4410 | val = Vcoding_system_for_write; | |
4411 | if (coding_system_require_warning | |
4412 | && !NILP (Ffboundp (Vselect_safe_coding_system_function))) | |
4413 | /* Confirm that VAL can surely encode the current region. */ | |
4414 | val = call5 (Vselect_safe_coding_system_function, | |
4415 | start, end, Fcons (Qt, Fcons (val, Qnil)), | |
4416 | Qnil, filename); | |
4417 | } | |
7c82a4a9 SM |
4418 | else |
4419 | { | |
4420 | /* If the variable `buffer-file-coding-system' is set locally, | |
4421 | it means that the file was read with some kind of code | |
4422 | conversion or the variable is explicitly set by users. We | |
4423 | had better write it out with the same coding system even if | |
4424 | `enable-multibyte-characters' is nil. | |
4425 | ||
4426 | If it is not set locally, we anyway have to convert EOL | |
4427 | format if the default value of `buffer-file-coding-system' | |
4428 | tells that it is not Unix-like (LF only) format. */ | |
4429 | int using_default_coding = 0; | |
4430 | int force_raw_text = 0; | |
4431 | ||
4b4deea2 | 4432 | val = BVAR (current_buffer, buffer_file_coding_system); |
7c82a4a9 SM |
4433 | if (NILP (val) |
4434 | || NILP (Flocal_variable_p (Qbuffer_file_coding_system, Qnil))) | |
4435 | { | |
4436 | val = Qnil; | |
4b4deea2 | 4437 | if (NILP (BVAR (current_buffer, enable_multibyte_characters))) |
7c82a4a9 SM |
4438 | force_raw_text = 1; |
4439 | } | |
efdc16c9 | 4440 | |
7c82a4a9 SM |
4441 | if (NILP (val)) |
4442 | { | |
4443 | /* Check file-coding-system-alist. */ | |
4444 | Lisp_Object args[7], coding_systems; | |
4445 | ||
4446 | args[0] = Qwrite_region; args[1] = start; args[2] = end; | |
4447 | args[3] = filename; args[4] = append; args[5] = visit; | |
4448 | args[6] = lockname; | |
4449 | coding_systems = Ffind_operation_coding_system (7, args); | |
4450 | if (CONSP (coding_systems) && !NILP (XCDR (coding_systems))) | |
4451 | val = XCDR (coding_systems); | |
4452 | } | |
4453 | ||
c934586d | 4454 | if (NILP (val)) |
7c82a4a9 SM |
4455 | { |
4456 | /* If we still have not decided a coding system, use the | |
4457 | default value of buffer-file-coding-system. */ | |
4b4deea2 | 4458 | val = BVAR (current_buffer, buffer_file_coding_system); |
7c82a4a9 SM |
4459 | using_default_coding = 1; |
4460 | } | |
efdc16c9 | 4461 | |
db327c7e KH |
4462 | if (! NILP (val) && ! force_raw_text) |
4463 | { | |
4464 | Lisp_Object spec, attrs; | |
4465 | ||
4466 | CHECK_CODING_SYSTEM_GET_SPEC (val, spec); | |
4467 | attrs = AREF (spec, 0); | |
4468 | if (EQ (CODING_ATTR_TYPE (attrs), Qraw_text)) | |
4469 | force_raw_text = 1; | |
4470 | } | |
4471 | ||
7c82a4a9 SM |
4472 | if (!force_raw_text |
4473 | && !NILP (Ffboundp (Vselect_safe_coding_system_function))) | |
4474 | /* Confirm that VAL can surely encode the current region. */ | |
905a4276 PJ |
4475 | val = call5 (Vselect_safe_coding_system_function, |
4476 | start, end, val, Qnil, filename); | |
7c82a4a9 | 4477 | |
db327c7e KH |
4478 | /* If the decided coding-system doesn't specify end-of-line |
4479 | format, we use that of | |
4480 | `default-buffer-file-coding-system'. */ | |
c934586d | 4481 | if (! using_default_coding |
4b4deea2 | 4482 | && ! NILP (BVAR (&buffer_defaults, buffer_file_coding_system))) |
db327c7e | 4483 | val = (coding_inherit_eol_type |
4b4deea2 | 4484 | (val, BVAR (&buffer_defaults, buffer_file_coding_system))); |
7c82a4a9 | 4485 | |
db327c7e KH |
4486 | /* If we decide not to encode text, use `raw-text' or one of its |
4487 | subsidiaries. */ | |
7c82a4a9 | 4488 | if (force_raw_text) |
db327c7e | 4489 | val = raw_text_coding_system (val); |
7c82a4a9 SM |
4490 | } |
4491 | ||
75421805 | 4492 | val = coding_inherit_eol_type (val, eol_parent); |
c934586d | 4493 | setup_coding_system (val, coding); |
7c82a4a9 | 4494 | |
4b4deea2 | 4495 | if (!STRINGP (start) && !NILP (BVAR (current_buffer, selective_display))) |
7c82a4a9 | 4496 | coding->mode |= CODING_MODE_SELECTIVE_DISPLAY; |
c934586d | 4497 | return val; |
7c82a4a9 SM |
4498 | } |
4499 | ||
a7ca3326 | 4500 | DEFUN ("write-region", Fwrite_region, Swrite_region, 3, 7, |
8c1a1077 PJ |
4501 | "r\nFWrite region to file: \ni\ni\ni\np", |
4502 | doc: /* Write current region into specified file. | |
c2efea25 RS |
4503 | When called from a program, requires three arguments: |
4504 | START, END and FILENAME. START and END are normally buffer positions | |
4505 | specifying the part of the buffer to write. | |
4506 | If START is nil, that means to use the entire buffer contents. | |
4507 | If START is a string, then output that string to the file | |
4508 | instead of any buffer contents; END is ignored. | |
4509 | ||
8c1a1077 PJ |
4510 | Optional fourth argument APPEND if non-nil means |
4511 | append to existing file contents (if any). If it is an integer, | |
4512 | seek to that offset in the file before writing. | |
36e50520 | 4513 | Optional fifth argument VISIT, if t or a string, means |
8c1a1077 PJ |
4514 | set the last-save-file-modtime of buffer to this file's modtime |
4515 | and mark buffer not modified. | |
4516 | If VISIT is a string, it is a second file name; | |
4517 | the output goes to FILENAME, but the buffer is marked as visiting VISIT. | |
4518 | VISIT is also the file name to lock and unlock for clash detection. | |
4519 | If VISIT is neither t nor nil nor a string, | |
5f4e6aa9 | 4520 | that means do not display the \"Wrote file\" message. |
8c1a1077 PJ |
4521 | The optional sixth arg LOCKNAME, if non-nil, specifies the name to |
4522 | use for locking and unlocking, overriding FILENAME and VISIT. | |
4523 | The optional seventh arg MUSTBENEW, if non-nil, insists on a check | |
4524 | for an existing file with the same name. If MUSTBENEW is `excl', | |
4525 | that means to get an error if the file already exists; never overwrite. | |
4526 | If MUSTBENEW is neither nil nor `excl', that means ask for | |
4527 | confirmation before overwriting, but do go ahead and overwrite the file | |
4528 | if the user confirms. | |
8c1a1077 PJ |
4529 | |
4530 | This does code conversion according to the value of | |
4531 | `coding-system-for-write', `buffer-file-coding-system', or | |
4532 | `file-coding-system-alist', and sets the variable | |
aacd8ba1 GM |
4533 | `last-coding-system-used' to the coding system actually used. |
4534 | ||
4535 | This calls `write-region-annotate-functions' at the start, and | |
4536 | `write-region-post-annotation-function' at the end. */) | |
5842a27b | 4537 | (Lisp_Object start, Lisp_Object end, Lisp_Object filename, Lisp_Object append, Lisp_Object visit, Lisp_Object lockname, Lisp_Object mustbenew) |
570d7624 JB |
4538 | { |
4539 | register int desc; | |
4540 | int failure; | |
6bbd7a29 | 4541 | int save_errno = 0; |
5976c3fe | 4542 | const char *fn; |
570d7624 | 4543 | struct stat st; |
d311d28c | 4544 | ptrdiff_t count = SPECPDL_INDEX (); |
6fc6f94b | 4545 | int count1; |
3eac9910 | 4546 | Lisp_Object handler; |
4ad827c5 | 4547 | Lisp_Object visit_file; |
65b7d3e7 | 4548 | Lisp_Object annotations; |
b1d1b865 | 4549 | Lisp_Object encoded_filename; |
d3a67486 SM |
4550 | int visiting = (EQ (visit, Qt) || STRINGP (visit)); |
4551 | int quietly = !NILP (visit); | |
7204a979 | 4552 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4, gcpro5; |
6fc6f94b | 4553 | struct buffer *given_buffer; |
6fdaa9a0 | 4554 | struct coding_system coding; |
570d7624 | 4555 | |
d3a67486 | 4556 | if (current_buffer->base_buffer && visiting) |
95385625 RS |
4557 | error ("Cannot do file visiting in an indirect buffer"); |
4558 | ||
561cb8e1 | 4559 | if (!NILP (start) && !STRINGP (start)) |
570d7624 JB |
4560 | validate_region (&start, &end); |
4561 | ||
95c1c901 | 4562 | visit_file = Qnil; |
59fac292 | 4563 | GCPRO5 (start, filename, visit, visit_file, lockname); |
b56567b5 | 4564 | |
570d7624 | 4565 | filename = Fexpand_file_name (filename, Qnil); |
de1d0127 | 4566 | |
236a12f2 | 4567 | if (!NILP (mustbenew) && !EQ (mustbenew, Qexcl)) |
b8b29dc9 | 4568 | barf_or_query_if_file_exists (filename, "overwrite", 1, 0, 1); |
de1d0127 | 4569 | |
561cb8e1 | 4570 | if (STRINGP (visit)) |
e5176bae | 4571 | visit_file = Fexpand_file_name (visit, Qnil); |
4ad827c5 RS |
4572 | else |
4573 | visit_file = filename; | |
4574 | ||
7204a979 RS |
4575 | if (NILP (lockname)) |
4576 | lockname = visit_file; | |
4577 | ||
65b7d3e7 RS |
4578 | annotations = Qnil; |
4579 | ||
32f4334d RS |
4580 | /* If the file name has special constructs in it, |
4581 | call the corresponding file handler. */ | |
49307295 | 4582 | handler = Ffind_file_name_handler (filename, Qwrite_region); |
b56ad927 | 4583 | /* If FILENAME has no handler, see if VISIT has one. */ |
93c30b5f | 4584 | if (NILP (handler) && STRINGP (visit)) |
199607e4 | 4585 | handler = Ffind_file_name_handler (visit, Qwrite_region); |
3eac9910 | 4586 | |
32f4334d RS |
4587 | if (!NILP (handler)) |
4588 | { | |
32f4334d | 4589 | Lisp_Object val; |
51cf6d37 RS |
4590 | val = call6 (handler, Qwrite_region, start, end, |
4591 | filename, append, visit); | |
32f4334d | 4592 | |
d6a3cc15 | 4593 | if (visiting) |
32f4334d | 4594 | { |
95385625 | 4595 | SAVE_MODIFF = MODIFF; |
4b4deea2 TT |
4596 | XSETFASTINT (BVAR (current_buffer, save_length), Z - BEG); |
4597 | BVAR (current_buffer, filename) = visit_file; | |
32f4334d | 4598 | } |
09121adc | 4599 | UNGCPRO; |
32f4334d RS |
4600 | return val; |
4601 | } | |
4602 | ||
4a38de71 KH |
4603 | record_unwind_protect (save_restriction_restore, save_restriction_save ()); |
4604 | ||
561cb8e1 RS |
4605 | /* Special kludge to simplify auto-saving. */ |
4606 | if (NILP (start)) | |
4607 | { | |
6b3d752c SM |
4608 | /* Do it later, so write-region-annotate-function can work differently |
4609 | if we save "the buffer" vs "a region". | |
4610 | This is useful in tar-mode. --Stef | |
2acfd7ae | 4611 | XSETFASTINT (start, BEG); |
6b3d752c | 4612 | XSETFASTINT (end, Z); */ |
4a38de71 | 4613 | Fwiden (); |
561cb8e1 RS |
4614 | } |
4615 | ||
67fbc0cb CY |
4616 | record_unwind_protect (build_annotations_unwind, |
4617 | Vwrite_region_annotation_buffers); | |
4618 | Vwrite_region_annotation_buffers = Fcons (Fcurrent_buffer (), Qnil); | |
aed13378 | 4619 | count1 = SPECPDL_INDEX (); |
6fc6f94b RS |
4620 | |
4621 | given_buffer = current_buffer; | |
bf3428a1 RS |
4622 | |
4623 | if (!STRINGP (start)) | |
236a12f2 | 4624 | { |
bf3428a1 RS |
4625 | annotations = build_annotations (start, end); |
4626 | ||
4627 | if (current_buffer != given_buffer) | |
4628 | { | |
4629 | XSETFASTINT (start, BEGV); | |
4630 | XSETFASTINT (end, ZV); | |
4631 | } | |
236a12f2 SM |
4632 | } |
4633 | ||
6b3d752c SM |
4634 | if (NILP (start)) |
4635 | { | |
4636 | XSETFASTINT (start, BEGV); | |
4637 | XSETFASTINT (end, ZV); | |
4638 | } | |
4639 | ||
236a12f2 SM |
4640 | UNGCPRO; |
4641 | ||
4642 | GCPRO5 (start, filename, annotations, visit_file, lockname); | |
4643 | ||
59fac292 SM |
4644 | /* Decide the coding-system to encode the data with. |
4645 | We used to make this choice before calling build_annotations, but that | |
4646 | leads to problems when a write-annotate-function takes care of | |
4647 | unsavable chars (as was the case with X-Symbol). */ | |
c934586d KH |
4648 | Vlast_coding_system_used |
4649 | = choose_write_coding_system (start, end, filename, | |
4650 | append, visit, lockname, &coding); | |
d6a3cc15 | 4651 | |
570d7624 JB |
4652 | #ifdef CLASH_DETECTION |
4653 | if (!auto_saving) | |
67fbc0cb | 4654 | lock_file (lockname); |
570d7624 JB |
4655 | #endif /* CLASH_DETECTION */ |
4656 | ||
b1d1b865 RS |
4657 | encoded_filename = ENCODE_FILE (filename); |
4658 | ||
5976c3fe | 4659 | fn = SSDATA (encoded_filename); |
570d7624 | 4660 | desc = -1; |
265a9e55 | 4661 | if (!NILP (append)) |
5e570b75 | 4662 | #ifdef DOS_NT |
05c65251 | 4663 | desc = emacs_open (fn, O_WRONLY | O_BINARY, 0); |
5e570b75 | 4664 | #else /* not DOS_NT */ |
68c45bf0 | 4665 | desc = emacs_open (fn, O_WRONLY, 0); |
5e570b75 | 4666 | #endif /* not DOS_NT */ |
570d7624 | 4667 | |
b1d1b865 | 4668 | if (desc < 0 && (NILP (append) || errno == ENOENT)) |
5e570b75 | 4669 | #ifdef DOS_NT |
68c45bf0 | 4670 | desc = emacs_open (fn, |
05c65251 | 4671 | O_WRONLY | O_CREAT | O_BINARY |
95522746 | 4672 | | (EQ (mustbenew, Qexcl) ? O_EXCL : O_TRUNC), |
68c45bf0 | 4673 | S_IREAD | S_IWRITE); |
5e570b75 | 4674 | #else /* not DOS_NT */ |
68c45bf0 | 4675 | desc = emacs_open (fn, O_WRONLY | O_TRUNC | O_CREAT |
7c752c80 | 4676 | | (EQ (mustbenew, Qexcl) ? O_EXCL : 0), |
68c45bf0 | 4677 | auto_saving ? auto_save_mode_bits : 0666); |
5e570b75 | 4678 | #endif /* not DOS_NT */ |
570d7624 JB |
4679 | |
4680 | if (desc < 0) | |
4681 | { | |
4682 | #ifdef CLASH_DETECTION | |
4683 | save_errno = errno; | |
7204a979 | 4684 | if (!auto_saving) unlock_file (lockname); |
570d7624 JB |
4685 | errno = save_errno; |
4686 | #endif /* CLASH_DETECTION */ | |
43fb7d9a | 4687 | UNGCPRO; |
570d7624 JB |
4688 | report_file_error ("Opening output file", Fcons (filename, Qnil)); |
4689 | } | |
4690 | ||
4691 | record_unwind_protect (close_file_unwind, make_number (desc)); | |
4692 | ||
c1c4693e | 4693 | if (!NILP (append) && !NILP (Ffile_regular_p (filename))) |
43fb7d9a | 4694 | { |
728f8f0a | 4695 | off_t ret; |
efdc16c9 | 4696 | |
43fb7d9a | 4697 | if (NUMBERP (append)) |
e69dafad | 4698 | ret = emacs_lseek (desc, XINT (append), SEEK_CUR); |
43fb7d9a | 4699 | else |
e69dafad | 4700 | ret = lseek (desc, 0, SEEK_END); |
43fb7d9a DL |
4701 | if (ret < 0) |
4702 | { | |
570d7624 | 4703 | #ifdef CLASH_DETECTION |
e5e9d610 | 4704 | save_errno = errno; |
43fb7d9a | 4705 | if (!auto_saving) unlock_file (lockname); |
e5e9d610 | 4706 | errno = save_errno; |
570d7624 | 4707 | #endif /* CLASH_DETECTION */ |
43fb7d9a DL |
4708 | UNGCPRO; |
4709 | report_file_error ("Lseek error", Fcons (filename, Qnil)); | |
4710 | } | |
4711 | } | |
efdc16c9 | 4712 | |
43fb7d9a | 4713 | UNGCPRO; |
570d7624 | 4714 | |
570d7624 JB |
4715 | failure = 0; |
4716 | immediate_quit = 1; | |
4717 | ||
561cb8e1 | 4718 | if (STRINGP (start)) |
570d7624 | 4719 | { |
d5db4077 | 4720 | failure = 0 > a_write (desc, start, 0, SCHARS (start), |
ce51c54c | 4721 | &annotations, &coding); |
570d7624 JB |
4722 | save_errno = errno; |
4723 | } | |
4724 | else if (XINT (start) != XINT (end)) | |
4725 | { | |
db327c7e KH |
4726 | failure = 0 > a_write (desc, Qnil, |
4727 | XINT (start), XINT (end) - XINT (start), | |
4728 | &annotations, &coding); | |
4729 | save_errno = errno; | |
69f6e679 RS |
4730 | } |
4731 | else | |
4732 | { | |
4733 | /* If file was empty, still need to write the annotations */ | |
c8a6d68a | 4734 | coding.mode |= CODING_MODE_LAST_BLOCK; |
ce51c54c | 4735 | failure = 0 > a_write (desc, Qnil, XINT (end), 0, &annotations, &coding); |
6fdaa9a0 KH |
4736 | save_errno = errno; |
4737 | } | |
4738 | ||
c8a6d68a KH |
4739 | if (CODING_REQUIRE_FLUSHING (&coding) |
4740 | && !(coding.mode & CODING_MODE_LAST_BLOCK) | |
1354debd | 4741 | && ! failure) |
6fdaa9a0 KH |
4742 | { |
4743 | /* We have to flush out a data. */ | |
c8a6d68a | 4744 | coding.mode |= CODING_MODE_LAST_BLOCK; |
db327c7e | 4745 | failure = 0 > e_write (desc, Qnil, 1, 1, &coding); |
69f6e679 | 4746 | save_errno = errno; |
570d7624 JB |
4747 | } |
4748 | ||
4749 | immediate_quit = 0; | |
4750 | ||
6e23c83e | 4751 | #ifdef HAVE_FSYNC |
570d7624 JB |
4752 | /* Note fsync appears to change the modtime on BSD4.2 (both vax and sun). |
4753 | Disk full in NFS may be reported here. */ | |
1daffa1c RS |
4754 | /* mib says that closing the file will try to write as fast as NFS can do |
4755 | it, and that means the fsync here is not crucial for autosave files. */ | |
ccf61795 | 4756 | if (!auto_saving && !write_region_inhibit_fsync && fsync (desc) < 0) |
cb33c142 | 4757 | { |
6cff77fd AS |
4758 | /* If fsync fails with EINTR, don't treat that as serious. Also |
4759 | ignore EINVAL which happens when fsync is not supported on this | |
4760 | file. */ | |
4761 | if (errno != EINTR && errno != EINVAL) | |
cb33c142 KH |
4762 | failure = 1, save_errno = errno; |
4763 | } | |
570d7624 JB |
4764 | #endif |
4765 | ||
570d7624 | 4766 | /* NFS can report a write failure now. */ |
68c45bf0 | 4767 | if (emacs_close (desc) < 0) |
570d7624 JB |
4768 | failure = 1, save_errno = errno; |
4769 | ||
570d7624 | 4770 | stat (fn, &st); |
67fbc0cb | 4771 | |
6fc6f94b RS |
4772 | /* Discard the unwind protect for close_file_unwind. */ |
4773 | specpdl_ptr = specpdl + count1; | |
67fbc0cb CY |
4774 | |
4775 | /* Call write-region-post-annotation-function. */ | |
294fa707 | 4776 | while (CONSP (Vwrite_region_annotation_buffers)) |
67fbc0cb CY |
4777 | { |
4778 | Lisp_Object buf = XCAR (Vwrite_region_annotation_buffers); | |
4779 | if (!NILP (Fbuffer_live_p (buf))) | |
4780 | { | |
4781 | Fset_buffer (buf); | |
4782 | if (FUNCTIONP (Vwrite_region_post_annotation_function)) | |
4783 | call0 (Vwrite_region_post_annotation_function); | |
4784 | } | |
4785 | Vwrite_region_annotation_buffers | |
4786 | = XCDR (Vwrite_region_annotation_buffers); | |
4787 | } | |
4788 | ||
4789 | unbind_to (count, Qnil); | |
570d7624 JB |
4790 | |
4791 | #ifdef CLASH_DETECTION | |
4792 | if (!auto_saving) | |
7204a979 | 4793 | unlock_file (lockname); |
570d7624 JB |
4794 | #endif /* CLASH_DETECTION */ |
4795 | ||
4796 | /* Do this before reporting IO error | |
4797 | to avoid a "file has changed on disk" warning on | |
4798 | next attempt to save. */ | |
d6a3cc15 | 4799 | if (visiting) |
58b963f7 | 4800 | { |
d35af63c | 4801 | current_buffer->modtime = get_stat_mtime (&st); |
58b963f7 SM |
4802 | current_buffer->modtime_size = st.st_size; |
4803 | } | |
570d7624 JB |
4804 | |
4805 | if (failure) | |
d5db4077 | 4806 | error ("IO error writing %s: %s", SDATA (filename), |
68c45bf0 | 4807 | emacs_strerror (save_errno)); |
570d7624 | 4808 | |
d6a3cc15 | 4809 | if (visiting) |
570d7624 | 4810 | { |
95385625 | 4811 | SAVE_MODIFF = MODIFF; |
4b4deea2 TT |
4812 | XSETFASTINT (BVAR (current_buffer, save_length), Z - BEG); |
4813 | BVAR (current_buffer, filename) = visit_file; | |
f4226e89 | 4814 | update_mode_lines++; |
570d7624 | 4815 | } |
d6a3cc15 | 4816 | else if (quietly) |
6b61353c KH |
4817 | { |
4818 | if (auto_saving | |
4b4deea2 TT |
4819 | && ! NILP (Fstring_equal (BVAR (current_buffer, filename), |
4820 | BVAR (current_buffer, auto_save_file_name)))) | |
6b61353c KH |
4821 | SAVE_MODIFF = MODIFF; |
4822 | ||
4823 | return Qnil; | |
4824 | } | |
570d7624 JB |
4825 | |
4826 | if (!auto_saving) | |
6b61353c | 4827 | message_with_string ((INTEGERP (append) |
0c328a0e RS |
4828 | ? "Updated %s" |
4829 | : ! NILP (append) | |
4830 | ? "Added to %s" | |
4831 | : "Wrote %s"), | |
4832 | visit_file, 1); | |
570d7624 JB |
4833 | |
4834 | return Qnil; | |
4835 | } | |
ec7adf26 | 4836 | \f |
dd4c5104 | 4837 | Lisp_Object merge (Lisp_Object, Lisp_Object, Lisp_Object); |
d6a3cc15 RS |
4838 | |
4839 | DEFUN ("car-less-than-car", Fcar_less_than_car, Scar_less_than_car, 2, 2, 0, | |
8c1a1077 | 4840 | doc: /* Return t if (car A) is numerically less than (car B). */) |
5842a27b | 4841 | (Lisp_Object a, Lisp_Object b) |
d6a3cc15 RS |
4842 | { |
4843 | return Flss (Fcar (a), Fcar (b)); | |
4844 | } | |
4845 | ||
4846 | /* Build the complete list of annotations appropriate for writing out | |
4847 | the text between START and END, by calling all the functions in | |
6fc6f94b RS |
4848 | write-region-annotate-functions and merging the lists they return. |
4849 | If one of these functions switches to a different buffer, we assume | |
4850 | that buffer contains altered text. Therefore, the caller must | |
4851 | make sure to restore the current buffer in all cases, | |
4852 | as save-excursion would do. */ | |
d6a3cc15 RS |
4853 | |
4854 | static Lisp_Object | |
971de7fb | 4855 | build_annotations (Lisp_Object start, Lisp_Object end) |
d6a3cc15 RS |
4856 | { |
4857 | Lisp_Object annotations; | |
4858 | Lisp_Object p, res; | |
4859 | struct gcpro gcpro1, gcpro2; | |
0a20b684 | 4860 | Lisp_Object original_buffer; |
bd235610 | 4861 | int i, used_global = 0; |
0a20b684 RS |
4862 | |
4863 | XSETBUFFER (original_buffer, current_buffer); | |
d6a3cc15 RS |
4864 | |
4865 | annotations = Qnil; | |
4866 | p = Vwrite_region_annotate_functions; | |
4867 | GCPRO2 (annotations, p); | |
28c3eb5a | 4868 | while (CONSP (p)) |
d6a3cc15 | 4869 | { |
6fc6f94b | 4870 | struct buffer *given_buffer = current_buffer; |
bd235610 SM |
4871 | if (EQ (Qt, XCAR (p)) && !used_global) |
4872 | { /* Use the global value of the hook. */ | |
4873 | Lisp_Object arg[2]; | |
4874 | used_global = 1; | |
4875 | arg[0] = Fdefault_value (Qwrite_region_annotate_functions); | |
4876 | arg[1] = XCDR (p); | |
4877 | p = Fappend (2, arg); | |
4878 | continue; | |
4879 | } | |
6fc6f94b | 4880 | Vwrite_region_annotations_so_far = annotations; |
28c3eb5a | 4881 | res = call2 (XCAR (p), start, end); |
6fc6f94b RS |
4882 | /* If the function makes a different buffer current, |
4883 | assume that means this buffer contains altered text to be output. | |
4884 | Reset START and END from the buffer bounds | |
4885 | and discard all previous annotations because they should have | |
4886 | been dealt with by this function. */ | |
4887 | if (current_buffer != given_buffer) | |
4888 | { | |
67fbc0cb CY |
4889 | Vwrite_region_annotation_buffers |
4890 | = Fcons (Fcurrent_buffer (), | |
4891 | Vwrite_region_annotation_buffers); | |
3cf29f61 RS |
4892 | XSETFASTINT (start, BEGV); |
4893 | XSETFASTINT (end, ZV); | |
6fc6f94b RS |
4894 | annotations = Qnil; |
4895 | } | |
d6a3cc15 RS |
4896 | Flength (res); /* Check basic validity of return value */ |
4897 | annotations = merge (annotations, res, Qcar_less_than_car); | |
28c3eb5a | 4898 | p = XCDR (p); |
d6a3cc15 | 4899 | } |
0d420e88 BG |
4900 | |
4901 | /* Now do the same for annotation functions implied by the file-format */ | |
4b4deea2 TT |
4902 | if (auto_saving && (!EQ (BVAR (current_buffer, auto_save_file_format), Qt))) |
4903 | p = BVAR (current_buffer, auto_save_file_format); | |
0d420e88 | 4904 | else |
4b4deea2 | 4905 | p = BVAR (current_buffer, file_format); |
28c3eb5a | 4906 | for (i = 0; CONSP (p); p = XCDR (p), ++i) |
0d420e88 BG |
4907 | { |
4908 | struct buffer *given_buffer = current_buffer; | |
efdc16c9 | 4909 | |
0d420e88 | 4910 | Vwrite_region_annotations_so_far = annotations; |
532ed661 GM |
4911 | |
4912 | /* Value is either a list of annotations or nil if the function | |
4913 | has written annotations to a temporary buffer, which is now | |
4914 | current. */ | |
28c3eb5a | 4915 | res = call5 (Qformat_annotate_function, XCAR (p), start, end, |
532ed661 | 4916 | original_buffer, make_number (i)); |
0d420e88 BG |
4917 | if (current_buffer != given_buffer) |
4918 | { | |
3cf29f61 RS |
4919 | XSETFASTINT (start, BEGV); |
4920 | XSETFASTINT (end, ZV); | |
0d420e88 BG |
4921 | annotations = Qnil; |
4922 | } | |
efdc16c9 | 4923 | |
532ed661 GM |
4924 | if (CONSP (res)) |
4925 | annotations = merge (annotations, res, Qcar_less_than_car); | |
0d420e88 | 4926 | } |
6fdaa9a0 | 4927 | |
236a12f2 SM |
4928 | UNGCPRO; |
4929 | return annotations; | |
4930 | } | |
4931 | ||
ec7adf26 | 4932 | \f |
ce51c54c KH |
4933 | /* Write to descriptor DESC the NCHARS chars starting at POS of STRING. |
4934 | If STRING is nil, POS is the character position in the current buffer. | |
d6a3cc15 | 4935 | Intersperse with them the annotations from *ANNOT |
ce51c54c | 4936 | which fall within the range of POS to POS + NCHARS, |
d6a3cc15 RS |
4937 | each at its appropriate position. |
4938 | ||
ec7adf26 RS |
4939 | We modify *ANNOT by discarding elements as we use them up. |
4940 | ||
d6a3cc15 RS |
4941 | The return value is negative in case of system call failure. */ |
4942 | ||
ec7adf26 | 4943 | static int |
d311d28c PE |
4944 | a_write (int desc, Lisp_Object string, ptrdiff_t pos, |
4945 | register ptrdiff_t nchars, Lisp_Object *annot, | |
8a2cbd72 | 4946 | struct coding_system *coding) |
d6a3cc15 RS |
4947 | { |
4948 | Lisp_Object tem; | |
d311d28c PE |
4949 | ptrdiff_t nextpos; |
4950 | ptrdiff_t lastpos = pos + nchars; | |
d6a3cc15 | 4951 | |
eb15aa18 | 4952 | while (NILP (*annot) || CONSP (*annot)) |
d6a3cc15 RS |
4953 | { |
4954 | tem = Fcar_safe (Fcar (*annot)); | |
ce51c54c | 4955 | nextpos = pos - 1; |
ec7adf26 | 4956 | if (INTEGERP (tem)) |
ce51c54c | 4957 | nextpos = XFASTINT (tem); |
ec7adf26 RS |
4958 | |
4959 | /* If there are no more annotations in this range, | |
4960 | output the rest of the range all at once. */ | |
ce51c54c KH |
4961 | if (! (nextpos >= pos && nextpos <= lastpos)) |
4962 | return e_write (desc, string, pos, lastpos, coding); | |
ec7adf26 RS |
4963 | |
4964 | /* Output buffer text up to the next annotation's position. */ | |
ce51c54c | 4965 | if (nextpos > pos) |
d6a3cc15 | 4966 | { |
055a28c9 | 4967 | if (0 > e_write (desc, string, pos, nextpos, coding)) |
d6a3cc15 | 4968 | return -1; |
ce51c54c | 4969 | pos = nextpos; |
d6a3cc15 | 4970 | } |
ec7adf26 | 4971 | /* Output the annotation. */ |
d6a3cc15 RS |
4972 | tem = Fcdr (Fcar (*annot)); |
4973 | if (STRINGP (tem)) | |
4974 | { | |
d5db4077 | 4975 | if (0 > e_write (desc, tem, 0, SCHARS (tem), coding)) |
d6a3cc15 RS |
4976 | return -1; |
4977 | } | |
4978 | *annot = Fcdr (*annot); | |
4979 | } | |
dfcf069d | 4980 | return 0; |
d6a3cc15 RS |
4981 | } |
4982 | ||
6fdaa9a0 | 4983 | |
ce51c54c KH |
4984 | /* Write text in the range START and END into descriptor DESC, |
4985 | encoding them with coding system CODING. If STRING is nil, START | |
4986 | and END are character positions of the current buffer, else they | |
4987 | are indexes to the string STRING. */ | |
ec7adf26 RS |
4988 | |
4989 | static int | |
d311d28c | 4990 | e_write (int desc, Lisp_Object string, ptrdiff_t start, ptrdiff_t end, |
8a2cbd72 | 4991 | struct coding_system *coding) |
570d7624 | 4992 | { |
ce51c54c KH |
4993 | if (STRINGP (string)) |
4994 | { | |
db327c7e | 4995 | start = 0; |
8f924df7 | 4996 | end = SCHARS (string); |
ce51c54c | 4997 | } |
570d7624 | 4998 | |
6fdaa9a0 KH |
4999 | /* We used to have a code for handling selective display here. But, |
5000 | now it is handled within encode_coding. */ | |
01ca97a2 KH |
5001 | |
5002 | while (start < end) | |
570d7624 | 5003 | { |
01ca97a2 | 5004 | if (STRINGP (string)) |
6ad568dd | 5005 | { |
01ca97a2 KH |
5006 | coding->src_multibyte = SCHARS (string) < SBYTES (string); |
5007 | if (CODING_REQUIRE_ENCODING (coding)) | |
5008 | { | |
5009 | encode_coding_object (coding, string, | |
5010 | start, string_char_to_byte (string, start), | |
5011 | end, string_char_to_byte (string, end), Qt); | |
5012 | } | |
5013 | else | |
5014 | { | |
5015 | coding->dst_object = string; | |
5016 | coding->consumed_char = SCHARS (string); | |
5017 | coding->produced = SBYTES (string); | |
5018 | } | |
6ad568dd | 5019 | } |
db327c7e | 5020 | else |
6ad568dd | 5021 | { |
d311d28c PE |
5022 | ptrdiff_t start_byte = CHAR_TO_BYTE (start); |
5023 | ptrdiff_t end_byte = CHAR_TO_BYTE (end); | |
b4132433 | 5024 | |
01ca97a2 KH |
5025 | coding->src_multibyte = (end - start) < (end_byte - start_byte); |
5026 | if (CODING_REQUIRE_ENCODING (coding)) | |
5027 | { | |
5028 | encode_coding_object (coding, Fcurrent_buffer (), | |
5029 | start, start_byte, end, end_byte, Qt); | |
5030 | } | |
5031 | else | |
5032 | { | |
5033 | coding->dst_object = Qnil; | |
5034 | coding->dst_pos_byte = start_byte; | |
5035 | if (start >= GPT || end <= GPT) | |
5036 | { | |
5037 | coding->consumed_char = end - start; | |
5038 | coding->produced = end_byte - start_byte; | |
5039 | } | |
5040 | else | |
5041 | { | |
5042 | coding->consumed_char = GPT - start; | |
5043 | coding->produced = GPT_BYTE - start_byte; | |
5044 | } | |
5045 | } | |
c185d744 | 5046 | } |
01ca97a2 KH |
5047 | |
5048 | if (coding->produced > 0) | |
c185d744 | 5049 | { |
01ca97a2 KH |
5050 | coding->produced -= |
5051 | emacs_write (desc, | |
5052 | STRINGP (coding->dst_object) | |
42a5b22f PE |
5053 | ? SSDATA (coding->dst_object) |
5054 | : (char *) BYTE_POS_ADDR (coding->dst_pos_byte), | |
01ca97a2 KH |
5055 | coding->produced); |
5056 | ||
5057 | if (coding->produced) | |
5058 | return -1; | |
570d7624 | 5059 | } |
01ca97a2 | 5060 | start += coding->consumed_char; |
c185d744 KH |
5061 | } |
5062 | ||
5063 | return 0; | |
570d7624 | 5064 | } |
ec7adf26 | 5065 | \f |
a7ca3326 | 5066 | DEFUN ("verify-visited-file-modtime", Fverify_visited_file_modtime, |
ec1b9b17 | 5067 | Sverify_visited_file_modtime, 0, 1, 0, |
8c1a1077 | 5068 | doc: /* Return t if last mod time of BUF's visited file matches what BUF records. |
6b61353c | 5069 | This means that the file has not been changed since it was visited or saved. |
ec1b9b17 | 5070 | If BUF is omitted or nil, it defaults to the current buffer. |
6b61353c | 5071 | See Info node `(elisp)Modification Time' for more details. */) |
5842a27b | 5072 | (Lisp_Object buf) |
570d7624 JB |
5073 | { |
5074 | struct buffer *b; | |
5075 | struct stat st; | |
32f4334d | 5076 | Lisp_Object handler; |
b1d1b865 | 5077 | Lisp_Object filename; |
e9a9ae03 | 5078 | EMACS_TIME mtime, diff; |
570d7624 | 5079 | |
ec1b9b17 GM |
5080 | if (NILP (buf)) |
5081 | b = current_buffer; | |
5082 | else | |
5083 | { | |
5084 | CHECK_BUFFER (buf); | |
5085 | b = XBUFFER (buf); | |
5086 | } | |
570d7624 | 5087 | |
4b4deea2 | 5088 | if (!STRINGP (BVAR (b, filename))) return Qt; |
d35af63c | 5089 | if (EMACS_NSECS (b->modtime) == UNKNOWN_MODTIME_NSECS) return Qt; |
570d7624 | 5090 | |
32f4334d RS |
5091 | /* If the file name has special constructs in it, |
5092 | call the corresponding file handler. */ | |
4b4deea2 | 5093 | handler = Ffind_file_name_handler (BVAR (b, filename), |
49307295 | 5094 | Qverify_visited_file_modtime); |
32f4334d | 5095 | if (!NILP (handler)) |
09121adc | 5096 | return call2 (handler, Qverify_visited_file_modtime, buf); |
32f4334d | 5097 | |
4b4deea2 | 5098 | filename = ENCODE_FILE (BVAR (b, filename)); |
b1d1b865 | 5099 | |
dbeed9a6 PE |
5100 | mtime = (stat (SSDATA (filename), &st) == 0 |
5101 | ? get_stat_mtime (&st) | |
f0941253 | 5102 | : time_error_value (errno)); |
d35af63c PE |
5103 | if ((EMACS_TIME_EQ (mtime, b->modtime) |
5104 | /* If both exist, accept them if they are off by one second. */ | |
5105 | || (EMACS_TIME_VALID_P (mtime) && EMACS_TIME_VALID_P (b->modtime) | |
e9a9ae03 PE |
5106 | && ((diff = (EMACS_TIME_LT (mtime, b->modtime) |
5107 | ? sub_emacs_time (b->modtime, mtime) | |
5108 | : sub_emacs_time (mtime, b->modtime))), | |
5109 | EMACS_TIME_LE (diff, make_emacs_time (1, 0))))) | |
58b963f7 SM |
5110 | && (st.st_size == b->modtime_size |
5111 | || b->modtime_size < 0)) | |
570d7624 JB |
5112 | return Qt; |
5113 | return Qnil; | |
5114 | } | |
5115 | ||
5116 | DEFUN ("clear-visited-file-modtime", Fclear_visited_file_modtime, | |
8c1a1077 PJ |
5117 | Sclear_visited_file_modtime, 0, 0, 0, |
5118 | doc: /* Clear out records of last mod time of visited file. | |
5119 | Next attempt to save will certainly not complain of a discrepancy. */) | |
5842a27b | 5120 | (void) |
570d7624 | 5121 | { |
e9a9ae03 | 5122 | current_buffer->modtime = make_emacs_time (0, UNKNOWN_MODTIME_NSECS); |
58b963f7 | 5123 | current_buffer->modtime_size = -1; |
570d7624 JB |
5124 | return Qnil; |
5125 | } | |
5126 | ||
f5d5eccf | 5127 | DEFUN ("visited-file-modtime", Fvisited_file_modtime, |
8c1a1077 PJ |
5128 | Svisited_file_modtime, 0, 0, 0, |
5129 | doc: /* Return the current buffer's recorded visited file modification time. | |
d35af63c | 5130 | The value is a list of the form (HIGH LOW USEC PSEC), like the time values that |
1c4d7f3d LMI |
5131 | `file-attributes' returns. If the current buffer has no recorded file |
5132 | modification time, this function returns 0. If the visited file | |
9d1d6e68 | 5133 | doesn't exist, HIGH will be -1. |
6b61353c | 5134 | See Info node `(elisp)Modification Time' for more details. */) |
5842a27b | 5135 | (void) |
f5d5eccf | 5136 | { |
d35af63c | 5137 | if (EMACS_NSECS (current_buffer->modtime) < 0) |
73ff9d42 | 5138 | return make_number (0); |
d35af63c | 5139 | return make_lisp_time (current_buffer->modtime); |
f5d5eccf RS |
5140 | } |
5141 | ||
570d7624 | 5142 | DEFUN ("set-visited-file-modtime", Fset_visited_file_modtime, |
8c1a1077 PJ |
5143 | Sset_visited_file_modtime, 0, 1, 0, |
5144 | doc: /* Update buffer's recorded modification time from the visited file's time. | |
5145 | Useful if the buffer was not read from the file normally | |
5146 | or if the file itself has been changed for some known benign reason. | |
5147 | An argument specifies the modification time value to use | |
5148 | \(instead of that of the visited file), in the form of a list | |
d35af63c | 5149 | \(HIGH LOW USEC PSEC) as returned by `current-time'. */) |
5842a27b | 5150 | (Lisp_Object time_list) |
570d7624 | 5151 | { |
f5d5eccf | 5152 | if (!NILP (time_list)) |
58b963f7 | 5153 | { |
31571fd7 | 5154 | current_buffer->modtime = lisp_time_argument (time_list); |
58b963f7 SM |
5155 | current_buffer->modtime_size = -1; |
5156 | } | |
f5d5eccf RS |
5157 | else |
5158 | { | |
5159 | register Lisp_Object filename; | |
5160 | struct stat st; | |
5161 | Lisp_Object handler; | |
570d7624 | 5162 | |
4b4deea2 | 5163 | filename = Fexpand_file_name (BVAR (current_buffer, filename), Qnil); |
32f4334d | 5164 | |
f5d5eccf RS |
5165 | /* If the file name has special constructs in it, |
5166 | call the corresponding file handler. */ | |
49307295 | 5167 | handler = Ffind_file_name_handler (filename, Qset_visited_file_modtime); |
f5d5eccf | 5168 | if (!NILP (handler)) |
caf3c431 | 5169 | /* The handler can find the file name the same way we did. */ |
76c881b0 | 5170 | return call2 (handler, Qset_visited_file_modtime, Qnil); |
b1d1b865 RS |
5171 | |
5172 | filename = ENCODE_FILE (filename); | |
5173 | ||
42a5b22f | 5174 | if (stat (SSDATA (filename), &st) >= 0) |
58b963f7 | 5175 | { |
d35af63c | 5176 | current_buffer->modtime = get_stat_mtime (&st); |
58b963f7 SM |
5177 | current_buffer->modtime_size = st.st_size; |
5178 | } | |
f5d5eccf | 5179 | } |
570d7624 JB |
5180 | |
5181 | return Qnil; | |
5182 | } | |
5183 | \f | |
f14b7e14 | 5184 | static Lisp_Object |
f839df0c | 5185 | auto_save_error (Lisp_Object error_val) |
570d7624 | 5186 | { |
d7f31e22 GM |
5187 | Lisp_Object args[3], msg; |
5188 | int i, nbytes; | |
5189 | struct gcpro gcpro1; | |
dfc22242 KS |
5190 | char *msgbuf; |
5191 | USE_SAFE_ALLOCA; | |
efdc16c9 | 5192 | |
ca730bf0 CY |
5193 | auto_save_error_occurred = 1; |
5194 | ||
385ed61f | 5195 | ring_bell (XFRAME (selected_frame)); |
efdc16c9 | 5196 | |
d7f31e22 | 5197 | args[0] = build_string ("Auto-saving %s: %s"); |
4b4deea2 | 5198 | args[1] = BVAR (current_buffer, name); |
f839df0c | 5199 | args[2] = Ferror_message_string (error_val); |
d7f31e22 GM |
5200 | msg = Fformat (3, args); |
5201 | GCPRO1 (msg); | |
d5db4077 | 5202 | nbytes = SBYTES (msg); |
98c6f1e3 | 5203 | msgbuf = SAFE_ALLOCA (nbytes); |
72af86bd | 5204 | memcpy (msgbuf, SDATA (msg), nbytes); |
d7f31e22 GM |
5205 | |
5206 | for (i = 0; i < 3; ++i) | |
5207 | { | |
5208 | if (i == 0) | |
dfc22242 | 5209 | message2 (msgbuf, nbytes, STRING_MULTIBYTE (msg)); |
d7f31e22 | 5210 | else |
dfc22242 | 5211 | message2_nolog (msgbuf, nbytes, STRING_MULTIBYTE (msg)); |
d7f31e22 GM |
5212 | Fsleep_for (make_number (1), Qnil); |
5213 | } | |
5214 | ||
e01f7773 | 5215 | SAFE_FREE (); |
d7f31e22 | 5216 | UNGCPRO; |
570d7624 JB |
5217 | return Qnil; |
5218 | } | |
5219 | ||
f14b7e14 | 5220 | static Lisp_Object |
971de7fb | 5221 | auto_save_1 (void) |
570d7624 | 5222 | { |
570d7624 | 5223 | struct stat st; |
d4a42098 KS |
5224 | Lisp_Object modes; |
5225 | ||
5226 | auto_save_mode_bits = 0666; | |
570d7624 JB |
5227 | |
5228 | /* Get visited file's mode to become the auto save file's mode. */ | |
4b4deea2 | 5229 | if (! NILP (BVAR (current_buffer, filename))) |
d4a42098 | 5230 | { |
4b4deea2 | 5231 | if (stat (SSDATA (BVAR (current_buffer, filename)), &st) >= 0) |
d4a42098 | 5232 | /* But make sure we can overwrite it later! */ |
18c52557 | 5233 | auto_save_mode_bits = (st.st_mode | 0600) & 0777; |
4b4deea2 | 5234 | else if ((modes = Ffile_modes (BVAR (current_buffer, filename)), |
d4a42098 KS |
5235 | INTEGERP (modes))) |
5236 | /* Remote files don't cooperate with stat. */ | |
18c52557 | 5237 | auto_save_mode_bits = (XINT (modes) | 0600) & 0777; |
d4a42098 | 5238 | } |
570d7624 JB |
5239 | |
5240 | return | |
4b4deea2 | 5241 | Fwrite_region (Qnil, Qnil, BVAR (current_buffer, auto_save_file_name), Qnil, |
699b53bc CY |
5242 | NILP (Vauto_save_visited_file_name) ? Qlambda : Qt, |
5243 | Qnil, Qnil); | |
570d7624 JB |
5244 | } |
5245 | ||
e54d3b5d | 5246 | static Lisp_Object |
971de7fb | 5247 | do_auto_save_unwind (Lisp_Object arg) /* used as unwind-protect function */ |
410ed5c3 | 5248 | |
e54d3b5d | 5249 | { |
fff7e982 | 5250 | FILE *stream = (FILE *) XSAVE_VALUE (arg)->pointer; |
3be3c08e | 5251 | auto_saving = 0; |
fff7e982 | 5252 | if (stream != NULL) |
aab12958 YM |
5253 | { |
5254 | BLOCK_INPUT; | |
5255 | fclose (stream); | |
5256 | UNBLOCK_INPUT; | |
5257 | } | |
e54d3b5d RS |
5258 | return Qnil; |
5259 | } | |
5260 | ||
a8c828be | 5261 | static Lisp_Object |
971de7fb | 5262 | do_auto_save_unwind_1 (Lisp_Object value) /* used as unwind-protect function */ |
410ed5c3 | 5263 | |
a8c828be RS |
5264 | { |
5265 | minibuffer_auto_raise = XINT (value); | |
5266 | return Qnil; | |
5267 | } | |
5268 | ||
5794dd61 | 5269 | static Lisp_Object |
971de7fb | 5270 | do_auto_save_make_dir (Lisp_Object dir) |
5794dd61 | 5271 | { |
09450bae | 5272 | Lisp_Object result; |
26816cbf | 5273 | |
09450bae PE |
5274 | auto_saving_dir_umask = 077; |
5275 | result = call2 (Qmake_directory, dir, Qt); | |
5276 | auto_saving_dir_umask = 0; | |
5277 | return result; | |
5794dd61 RS |
5278 | } |
5279 | ||
5280 | static Lisp_Object | |
971de7fb | 5281 | do_auto_save_eh (Lisp_Object ignore) |
5794dd61 | 5282 | { |
09450bae | 5283 | auto_saving_dir_umask = 0; |
5794dd61 RS |
5284 | return Qnil; |
5285 | } | |
5286 | ||
a7ca3326 | 5287 | DEFUN ("do-auto-save", Fdo_auto_save, Sdo_auto_save, 0, 2, "", |
8c1a1077 PJ |
5288 | doc: /* Auto-save all buffers that need it. |
5289 | This is all buffers that have auto-saving enabled | |
5290 | and are changed since last auto-saved. | |
5291 | Auto-saving writes the buffer into a file | |
5292 | so that your editing is not lost if the system crashes. | |
5293 | This file is not the file you visited; that changes only when you save. | |
5294 | Normally we run the normal hook `auto-save-hook' before saving. | |
5295 | ||
5296 | A non-nil NO-MESSAGE argument means do not print any message if successful. | |
5297 | A non-nil CURRENT-ONLY argument means save only current buffer. */) | |
5842a27b | 5298 | (Lisp_Object no_message, Lisp_Object current_only) |
570d7624 JB |
5299 | { |
5300 | struct buffer *old = current_buffer, *b; | |
dee091a3 | 5301 | Lisp_Object tail, buf, hook; |
570d7624 | 5302 | int auto_saved = 0; |
f14b1c68 | 5303 | int do_handled_files; |
ff4c9993 | 5304 | Lisp_Object oquit; |
fff7e982 | 5305 | FILE *stream = NULL; |
d311d28c | 5306 | ptrdiff_t count = SPECPDL_INDEX (); |
a8c828be | 5307 | int orig_minibuffer_auto_raise = minibuffer_auto_raise; |
5794dd61 | 5308 | int old_message_p = 0; |
d57563b6 | 5309 | struct gcpro gcpro1, gcpro2; |
38da540d RS |
5310 | |
5311 | if (max_specpdl_size < specpdl_size + 40) | |
5312 | max_specpdl_size = specpdl_size + 40; | |
5313 | ||
5314 | if (minibuf_level) | |
5315 | no_message = Qt; | |
5316 | ||
5794dd61 RS |
5317 | if (NILP (no_message)) |
5318 | { | |
5319 | old_message_p = push_message (); | |
5320 | record_unwind_protect (pop_message_unwind, Qnil); | |
5321 | } | |
efdc16c9 | 5322 | |
ff4c9993 RS |
5323 | /* Ordinarily don't quit within this function, |
5324 | but don't make it impossible to quit (in case we get hung in I/O). */ | |
5325 | oquit = Vquit_flag; | |
5326 | Vquit_flag = Qnil; | |
570d7624 JB |
5327 | |
5328 | /* No GCPRO needed, because (when it matters) all Lisp_Object variables | |
5329 | point to non-strings reached from Vbuffer_alist. */ | |
5330 | ||
dee091a3 JD |
5331 | hook = intern ("auto-save-hook"); |
5332 | Frun_hooks (1, &hook); | |
570d7624 | 5333 | |
e54d3b5d RS |
5334 | if (STRINGP (Vauto_save_list_file_name)) |
5335 | { | |
0894672f | 5336 | Lisp_Object listfile; |
efdc16c9 | 5337 | |
258fd2cb | 5338 | listfile = Fexpand_file_name (Vauto_save_list_file_name, Qnil); |
0894672f GM |
5339 | |
5340 | /* Don't try to create the directory when shutting down Emacs, | |
5341 | because creating the directory might signal an error, and | |
5342 | that would leave Emacs in a strange state. */ | |
5343 | if (!NILP (Vrun_hooks)) | |
5344 | { | |
5345 | Lisp_Object dir; | |
d57563b6 RS |
5346 | dir = Qnil; |
5347 | GCPRO2 (dir, listfile); | |
0894672f GM |
5348 | dir = Ffile_name_directory (listfile); |
5349 | if (NILP (Ffile_directory_p (dir))) | |
5794dd61 | 5350 | internal_condition_case_1 (do_auto_save_make_dir, |
09450bae | 5351 | dir, Qt, |
5794dd61 | 5352 | do_auto_save_eh); |
d57563b6 | 5353 | UNGCPRO; |
0894672f | 5354 | } |
efdc16c9 | 5355 | |
42a5b22f | 5356 | stream = fopen (SSDATA (listfile), "w"); |
1b335d29 | 5357 | } |
199607e4 | 5358 | |
fff7e982 KS |
5359 | record_unwind_protect (do_auto_save_unwind, |
5360 | make_save_value (stream, 0)); | |
a8c828be RS |
5361 | record_unwind_protect (do_auto_save_unwind_1, |
5362 | make_number (minibuffer_auto_raise)); | |
5363 | minibuffer_auto_raise = 0; | |
3be3c08e | 5364 | auto_saving = 1; |
ca730bf0 | 5365 | auto_save_error_occurred = 0; |
3be3c08e | 5366 | |
6b61353c KH |
5367 | /* On first pass, save all files that don't have handlers. |
5368 | On second pass, save all files that do have handlers. | |
5369 | ||
5370 | If Emacs is crashing, the handlers may tweak what is causing | |
5371 | Emacs to crash in the first place, and it would be a shame if | |
5372 | Emacs failed to autosave perfectly ordinary files because it | |
5373 | couldn't handle some ange-ftp'd file. */ | |
5374 | ||
f14b1c68 | 5375 | for (do_handled_files = 0; do_handled_files < 2; do_handled_files++) |
8e50cc2d | 5376 | for (tail = Vbuffer_alist; CONSP (tail); tail = XCDR (tail)) |
f14b1c68 | 5377 | { |
03699b14 | 5378 | buf = XCDR (XCAR (tail)); |
f14b1c68 | 5379 | b = XBUFFER (buf); |
199607e4 | 5380 | |
e54d3b5d | 5381 | /* Record all the buffers that have auto save mode |
258fd2cb RS |
5382 | in the special file that lists them. For each of these buffers, |
5383 | Record visited name (if any) and auto save name. */ | |
4b4deea2 | 5384 | if (STRINGP (BVAR (b, auto_save_file_name)) |
1b335d29 | 5385 | && stream != NULL && do_handled_files == 0) |
e54d3b5d | 5386 | { |
aab12958 | 5387 | BLOCK_INPUT; |
4b4deea2 | 5388 | if (!NILP (BVAR (b, filename))) |
258fd2cb | 5389 | { |
4b4deea2 TT |
5390 | fwrite (SDATA (BVAR (b, filename)), 1, |
5391 | SBYTES (BVAR (b, filename)), stream); | |
258fd2cb | 5392 | } |
1b335d29 | 5393 | putc ('\n', stream); |
4b4deea2 TT |
5394 | fwrite (SDATA (BVAR (b, auto_save_file_name)), 1, |
5395 | SBYTES (BVAR (b, auto_save_file_name)), stream); | |
1b335d29 | 5396 | putc ('\n', stream); |
aab12958 | 5397 | UNBLOCK_INPUT; |
e54d3b5d | 5398 | } |
17857782 | 5399 | |
f14b1c68 JB |
5400 | if (!NILP (current_only) |
5401 | && b != current_buffer) | |
5402 | continue; | |
e54d3b5d | 5403 | |
95385625 RS |
5404 | /* Don't auto-save indirect buffers. |
5405 | The base buffer takes care of it. */ | |
5406 | if (b->base_buffer) | |
5407 | continue; | |
5408 | ||
f14b1c68 JB |
5409 | /* Check for auto save enabled |
5410 | and file changed since last auto save | |
5411 | and file changed since last real save. */ | |
4b4deea2 | 5412 | if (STRINGP (BVAR (b, auto_save_file_name)) |
95385625 | 5413 | && BUF_SAVE_MODIFF (b) < BUF_MODIFF (b) |
0b5397c2 | 5414 | && BUF_AUTOSAVE_MODIFF (b) < BUF_MODIFF (b) |
82c2d839 | 5415 | /* -1 means we've turned off autosaving for a while--see below. */ |
4b4deea2 | 5416 | && XINT (BVAR (b, save_length)) >= 0 |
f14b1c68 | 5417 | && (do_handled_files |
4b4deea2 | 5418 | || NILP (Ffind_file_name_handler (BVAR (b, auto_save_file_name), |
49307295 | 5419 | Qwrite_region)))) |
f14b1c68 | 5420 | { |
e9a9ae03 PE |
5421 | EMACS_TIME before_time = current_emacs_time (); |
5422 | EMACS_TIME after_time; | |
b60247d9 RS |
5423 | |
5424 | /* If we had a failure, don't try again for 20 minutes. */ | |
d311d28c | 5425 | if (b->auto_save_failure_time > 0 |
b60247d9 RS |
5426 | && EMACS_SECS (before_time) - b->auto_save_failure_time < 1200) |
5427 | continue; | |
5428 | ||
090101cf CY |
5429 | set_buffer_internal (b); |
5430 | if (NILP (Vauto_save_include_big_deletions) | |
4b4deea2 | 5431 | && (XFASTINT (BVAR (b, save_length)) * 10 |
4be941e3 | 5432 | > (BUF_Z (b) - BUF_BEG (b)) * 13) |
f14b1c68 JB |
5433 | /* A short file is likely to change a large fraction; |
5434 | spare the user annoying messages. */ | |
4b4deea2 | 5435 | && XFASTINT (BVAR (b, save_length)) > 5000 |
f14b1c68 | 5436 | /* These messages are frequent and annoying for `*mail*'. */ |
4b4deea2 | 5437 | && !EQ (BVAR (b, filename), Qnil) |
f14b1c68 JB |
5438 | && NILP (no_message)) |
5439 | { | |
5440 | /* It has shrunk too much; turn off auto-saving here. */ | |
a8c828be | 5441 | minibuffer_auto_raise = orig_minibuffer_auto_raise; |
fd91d0d4 | 5442 | message_with_string ("Buffer %s has shrunk a lot; auto save disabled in that buffer until next real save", |
4b4deea2 | 5443 | BVAR (b, name), 1); |
a8c828be | 5444 | minibuffer_auto_raise = 0; |
82c2d839 RS |
5445 | /* Turn off auto-saving until there's a real save, |
5446 | and prevent any more warnings. */ | |
4b4deea2 | 5447 | XSETINT (BVAR (b, save_length), -1); |
f14b1c68 JB |
5448 | Fsleep_for (make_number (1), Qnil); |
5449 | continue; | |
5450 | } | |
f14b1c68 JB |
5451 | if (!auto_saved && NILP (no_message)) |
5452 | message1 ("Auto-saving..."); | |
5453 | internal_condition_case (auto_save_1, Qt, auto_save_error); | |
5454 | auto_saved++; | |
0b5397c2 | 5455 | BUF_AUTOSAVE_MODIFF (b) = BUF_MODIFF (b); |
4b4deea2 | 5456 | XSETFASTINT (BVAR (current_buffer, save_length), Z - BEG); |
f14b1c68 | 5457 | set_buffer_internal (old); |
b60247d9 | 5458 | |
e9a9ae03 | 5459 | after_time = current_emacs_time (); |
b60247d9 RS |
5460 | |
5461 | /* If auto-save took more than 60 seconds, | |
5462 | assume it was an NFS failure that got a timeout. */ | |
5463 | if (EMACS_SECS (after_time) - EMACS_SECS (before_time) > 60) | |
5464 | b->auto_save_failure_time = EMACS_SECS (after_time); | |
f14b1c68 JB |
5465 | } |
5466 | } | |
570d7624 | 5467 | |
b67f2ca5 RS |
5468 | /* Prevent another auto save till enough input events come in. */ |
5469 | record_auto_save (); | |
570d7624 | 5470 | |
17857782 | 5471 | if (auto_saved && NILP (no_message)) |
f05b275b | 5472 | { |
5794dd61 | 5473 | if (old_message_p) |
31f3d831 | 5474 | { |
5794dd61 RS |
5475 | /* If we are going to restore an old message, |
5476 | give time to read ours. */ | |
83f8d903 | 5477 | sit_for (make_number (1), 0, 0); |
c71106e5 | 5478 | restore_message (); |
31f3d831 | 5479 | } |
ca730bf0 | 5480 | else if (!auto_save_error_occurred) |
31e31a15 CY |
5481 | /* Don't overwrite the error message if an error occurred. |
5482 | If we displayed a message and then restored a state | |
5794dd61 | 5483 | with no message, leave a "done" message on the screen. */ |
f05b275b KH |
5484 | message1 ("Auto-saving...done"); |
5485 | } | |
570d7624 | 5486 | |
ff4c9993 RS |
5487 | Vquit_flag = oquit; |
5488 | ||
5794dd61 | 5489 | /* This restores the message-stack status. */ |
e54d3b5d | 5490 | unbind_to (count, Qnil); |
570d7624 JB |
5491 | return Qnil; |
5492 | } | |
5493 | ||
5494 | DEFUN ("set-buffer-auto-saved", Fset_buffer_auto_saved, | |
8c1a1077 PJ |
5495 | Sset_buffer_auto_saved, 0, 0, 0, |
5496 | doc: /* Mark current buffer as auto-saved with its current text. | |
5497 | No auto-save file will be written until the buffer changes again. */) | |
5842a27b | 5498 | (void) |
570d7624 | 5499 | { |
0b5397c2 SM |
5500 | /* FIXME: This should not be called in indirect buffers, since |
5501 | they're not autosaved. */ | |
5502 | BUF_AUTOSAVE_MODIFF (current_buffer) = MODIFF; | |
4b4deea2 | 5503 | XSETFASTINT (BVAR (current_buffer, save_length), Z - BEG); |
d311d28c | 5504 | current_buffer->auto_save_failure_time = 0; |
b60247d9 RS |
5505 | return Qnil; |
5506 | } | |
5507 | ||
5508 | DEFUN ("clear-buffer-auto-save-failure", Fclear_buffer_auto_save_failure, | |
8c1a1077 PJ |
5509 | Sclear_buffer_auto_save_failure, 0, 0, 0, |
5510 | doc: /* Clear any record of a recent auto-save failure in the current buffer. */) | |
5842a27b | 5511 | (void) |
b60247d9 | 5512 | { |
d311d28c | 5513 | current_buffer->auto_save_failure_time = 0; |
570d7624 JB |
5514 | return Qnil; |
5515 | } | |
5516 | ||
5517 | DEFUN ("recent-auto-save-p", Frecent_auto_save_p, Srecent_auto_save_p, | |
8c1a1077 | 5518 | 0, 0, 0, |
68780e2a RS |
5519 | doc: /* Return t if current buffer has been auto-saved recently. |
5520 | More precisely, if it has been auto-saved since last read from or saved | |
5521 | in the visited file. If the buffer has no visited file, | |
5522 | then any auto-save counts as "recent". */) | |
5842a27b | 5523 | (void) |
570d7624 | 5524 | { |
0b5397c2 SM |
5525 | /* FIXME: maybe we should return nil for indirect buffers since |
5526 | they're never autosaved. */ | |
5527 | return (SAVE_MODIFF < BUF_AUTOSAVE_MODIFF (current_buffer) ? Qt : Qnil); | |
570d7624 JB |
5528 | } |
5529 | \f | |
5530 | /* Reading and completing file names */ | |
6e710ae5 | 5531 | |
88208bb8 JD |
5532 | DEFUN ("next-read-file-uses-dialog-p", Fnext_read_file_uses_dialog_p, |
5533 | Snext_read_file_uses_dialog_p, 0, 0, 0, | |
5534 | doc: /* Return t if a call to `read-file-name' will use a dialog. | |
5535 | The return value is only relevant for a call to `read-file-name' that happens | |
1a0de25c | 5536 | before any other event (mouse or keypress) is handled. */) |
5842a27b | 5537 | (void) |
88208bb8 | 5538 | { |
9e2a2647 | 5539 | #if defined (USE_MOTIF) || defined (HAVE_NTGUI) || defined (USE_GTK) |
88208bb8 JD |
5540 | if ((NILP (last_nonmenu_event) || CONSP (last_nonmenu_event)) |
5541 | && use_dialog_box | |
5542 | && use_file_dialog | |
5543 | && have_menus_p ()) | |
5544 | return Qt; | |
5545 | #endif | |
5546 | return Qnil; | |
5547 | } | |
d4a42098 | 5548 | |
dbd50d4b | 5549 | Lisp_Object |
971de7fb | 5550 | Fread_file_name (Lisp_Object prompt, Lisp_Object dir, Lisp_Object default_filename, Lisp_Object mustmatch, Lisp_Object initial, Lisp_Object predicate) |
570d7624 | 5551 | { |
fd4ead52 | 5552 | struct gcpro gcpro1; |
dbd50d4b | 5553 | Lisp_Object args[7]; |
a79485af | 5554 | |
71e1f69d | 5555 | GCPRO1 (default_filename); |
dbd50d4b SM |
5556 | args[0] = intern ("read-file-name"); |
5557 | args[1] = prompt; | |
5558 | args[2] = dir; | |
5559 | args[3] = default_filename; | |
5560 | args[4] = mustmatch; | |
5561 | args[5] = initial; | |
5562 | args[6] = predicate; | |
5563 | RETURN_UNGCPRO (Ffuncall (7, args)); | |
570d7624 | 5564 | } |
9c856db9 | 5565 | |
570d7624 | 5566 | \f |
dfcf069d | 5567 | void |
971de7fb | 5568 | syms_of_fileio (void) |
570d7624 | 5569 | { |
cd3520a4 JB |
5570 | DEFSYM (Qoperations, "operations"); |
5571 | DEFSYM (Qexpand_file_name, "expand-file-name"); | |
5572 | DEFSYM (Qsubstitute_in_file_name, "substitute-in-file-name"); | |
5573 | DEFSYM (Qdirectory_file_name, "directory-file-name"); | |
5574 | DEFSYM (Qfile_name_directory, "file-name-directory"); | |
5575 | DEFSYM (Qfile_name_nondirectory, "file-name-nondirectory"); | |
5576 | DEFSYM (Qunhandled_file_name_directory, "unhandled-file-name-directory"); | |
5577 | DEFSYM (Qfile_name_as_directory, "file-name-as-directory"); | |
5578 | DEFSYM (Qcopy_file, "copy-file"); | |
5579 | DEFSYM (Qmake_directory_internal, "make-directory-internal"); | |
5580 | DEFSYM (Qmake_directory, "make-directory"); | |
5581 | DEFSYM (Qdelete_directory_internal, "delete-directory-internal"); | |
5582 | DEFSYM (Qdelete_file, "delete-file"); | |
5583 | DEFSYM (Qrename_file, "rename-file"); | |
5584 | DEFSYM (Qadd_name_to_file, "add-name-to-file"); | |
5585 | DEFSYM (Qmake_symbolic_link, "make-symbolic-link"); | |
5586 | DEFSYM (Qfile_exists_p, "file-exists-p"); | |
5587 | DEFSYM (Qfile_executable_p, "file-executable-p"); | |
5588 | DEFSYM (Qfile_readable_p, "file-readable-p"); | |
5589 | DEFSYM (Qfile_writable_p, "file-writable-p"); | |
5590 | DEFSYM (Qfile_symlink_p, "file-symlink-p"); | |
5591 | DEFSYM (Qaccess_file, "access-file"); | |
5592 | DEFSYM (Qfile_directory_p, "file-directory-p"); | |
5593 | DEFSYM (Qfile_regular_p, "file-regular-p"); | |
5594 | DEFSYM (Qfile_accessible_directory_p, "file-accessible-directory-p"); | |
5595 | DEFSYM (Qfile_modes, "file-modes"); | |
5596 | DEFSYM (Qset_file_modes, "set-file-modes"); | |
5597 | DEFSYM (Qset_file_times, "set-file-times"); | |
5598 | DEFSYM (Qfile_selinux_context, "file-selinux-context"); | |
5599 | DEFSYM (Qset_file_selinux_context, "set-file-selinux-context"); | |
5600 | DEFSYM (Qfile_newer_than_file_p, "file-newer-than-file-p"); | |
5601 | DEFSYM (Qinsert_file_contents, "insert-file-contents"); | |
5602 | DEFSYM (Qwrite_region, "write-region"); | |
5603 | DEFSYM (Qverify_visited_file_modtime, "verify-visited-file-modtime"); | |
5604 | DEFSYM (Qset_visited_file_modtime, "set-visited-file-modtime"); | |
5605 | DEFSYM (Qauto_save_coding, "auto-save-coding"); | |
5606 | ||
5607 | DEFSYM (Qfile_name_history, "file-name-history"); | |
642ef245 | 5608 | Fset (Qfile_name_history, Qnil); |
15c65264 | 5609 | |
cd3520a4 JB |
5610 | DEFSYM (Qfile_error, "file-error"); |
5611 | DEFSYM (Qfile_already_exists, "file-already-exists"); | |
5612 | DEFSYM (Qfile_date_error, "file-date-error"); | |
5613 | DEFSYM (Qexcl, "excl"); | |
570d7624 | 5614 | |
29208e82 | 5615 | DEFVAR_LISP ("file-name-coding-system", Vfile_name_coding_system, |
fb7ada5f | 5616 | doc: /* Coding system for encoding file names. |
346ebf53 | 5617 | If it is nil, `default-file-name-coding-system' (which see) is used. */); |
b1d1b865 RS |
5618 | Vfile_name_coding_system = Qnil; |
5619 | ||
cd913586 | 5620 | DEFVAR_LISP ("default-file-name-coding-system", |
29208e82 | 5621 | Vdefault_file_name_coding_system, |
8c1a1077 | 5622 | doc: /* Default coding system for encoding file names. |
346ebf53 | 5623 | This variable is used only when `file-name-coding-system' is nil. |
8c1a1077 | 5624 | |
346ebf53 | 5625 | This variable is set/changed by the command `set-language-environment'. |
8c1a1077 | 5626 | User should not set this variable manually, |
346ebf53 | 5627 | instead use `file-name-coding-system' to get a constant encoding |
8c1a1077 | 5628 | of file names regardless of the current language environment. */); |
cd913586 KH |
5629 | Vdefault_file_name_coding_system = Qnil; |
5630 | ||
cd3520a4 JB |
5631 | DEFSYM (Qformat_decode, "format-decode"); |
5632 | DEFSYM (Qformat_annotate_function, "format-annotate-function"); | |
5633 | DEFSYM (Qafter_insert_file_set_coding, "after-insert-file-set-coding"); | |
5634 | DEFSYM (Qcar_less_than_car, "car-less-than-car"); | |
d6a3cc15 | 5635 | |
570d7624 | 5636 | Fput (Qfile_error, Qerror_conditions, |
d67b4f80 | 5637 | Fpurecopy (list2 (Qfile_error, Qerror))); |
570d7624 | 5638 | Fput (Qfile_error, Qerror_message, |
2a0213a6 | 5639 | build_pure_c_string ("File error")); |
570d7624 JB |
5640 | |
5641 | Fput (Qfile_already_exists, Qerror_conditions, | |
d67b4f80 | 5642 | Fpurecopy (list3 (Qfile_already_exists, Qfile_error, Qerror))); |
570d7624 | 5643 | Fput (Qfile_already_exists, Qerror_message, |
2a0213a6 | 5644 | build_pure_c_string ("File already exists")); |
570d7624 | 5645 | |
c0b7b21c | 5646 | Fput (Qfile_date_error, Qerror_conditions, |
d67b4f80 | 5647 | Fpurecopy (list3 (Qfile_date_error, Qfile_error, Qerror))); |
c0b7b21c | 5648 | Fput (Qfile_date_error, Qerror_message, |
2a0213a6 | 5649 | build_pure_c_string ("Cannot set file date")); |
c0b7b21c | 5650 | |
29208e82 | 5651 | DEFVAR_LISP ("file-name-handler-alist", Vfile_name_handler_alist, |
a59225b1 CY |
5652 | doc: /* Alist of elements (REGEXP . HANDLER) for file names handled specially. |
5653 | If a file name matches REGEXP, all I/O on that file is done by calling | |
5654 | HANDLER. If a file name matches more than one handler, the handler | |
5655 | whose match starts last in the file name gets precedence. The | |
5656 | function `find-file-name-handler' checks this list for a handler for | |
5657 | its argument. | |
5658 | ||
5659 | HANDLER should be a function. The first argument given to it is the | |
5660 | name of the I/O primitive to be handled; the remaining arguments are | |
5661 | the arguments that were passed to that primitive. For example, if you | |
5662 | do (file-exists-p FILENAME) and FILENAME is handled by HANDLER, then | |
5663 | HANDLER is called like this: | |
5664 | ||
5665 | (funcall HANDLER 'file-exists-p FILENAME) | |
5666 | ||
5667 | Note that HANDLER must be able to handle all I/O primitives; if it has | |
5668 | nothing special to do for a primitive, it should reinvoke the | |
5669 | primitive to handle the operation \"the usual way\". | |
5670 | See Info node `(elisp)Magic File Names' for more details. */); | |
09121adc RS |
5671 | Vfile_name_handler_alist = Qnil; |
5672 | ||
0414b394 | 5673 | DEFVAR_LISP ("set-auto-coding-function", |
29208e82 | 5674 | Vset_auto_coding_function, |
8c1a1077 PJ |
5675 | doc: /* If non-nil, a function to call to decide a coding system of file. |
5676 | Two arguments are passed to this function: the file name | |
5677 | and the length of a file contents following the point. | |
5678 | This function should return a coding system to decode the file contents. | |
5679 | It should check the file name against `auto-coding-alist'. | |
5680 | If no coding system is decided, it should check a coding system | |
5681 | specified in the heading lines with the format: | |
5682 | -*- ... coding: CODING-SYSTEM; ... -*- | |
5683 | or local variable spec of the tailing lines with `coding:' tag. */); | |
0414b394 | 5684 | Vset_auto_coding_function = Qnil; |
c9e82392 | 5685 | |
29208e82 | 5686 | DEFVAR_LISP ("after-insert-file-functions", Vafter_insert_file_functions, |
8c1a1077 | 5687 | doc: /* A list of functions to be called at the end of `insert-file-contents'. |
0cf9f5b5 RS |
5688 | Each is passed one argument, the number of characters inserted, |
5689 | with point at the start of the inserted text. Each function | |
5690 | should leave point the same, and return the new character count. | |
cf6d2357 RS |
5691 | If `insert-file-contents' is intercepted by a handler from |
5692 | `file-name-handler-alist', that handler is responsible for calling the | |
5693 | functions in `after-insert-file-functions' if appropriate. */); | |
d6a3cc15 RS |
5694 | Vafter_insert_file_functions = Qnil; |
5695 | ||
29208e82 | 5696 | DEFVAR_LISP ("write-region-annotate-functions", Vwrite_region_annotate_functions, |
8c1a1077 PJ |
5697 | doc: /* A list of functions to be called at the start of `write-region'. |
5698 | Each is passed two arguments, START and END as for `write-region'. | |
5699 | These are usually two numbers but not always; see the documentation | |
5700 | for `write-region'. The function should return a list of pairs | |
5701 | of the form (POSITION . STRING), consisting of strings to be effectively | |
5702 | inserted at the specified positions of the file being written (1 means to | |
5703 | insert before the first byte written). The POSITIONs must be sorted into | |
67fbc0cb CY |
5704 | increasing order. |
5705 | ||
5706 | If there are several annotation functions, the lists returned by these | |
5707 | functions are merged destructively. As each annotation function runs, | |
5708 | the variable `write-region-annotations-so-far' contains a list of all | |
5709 | annotations returned by previous annotation functions. | |
5710 | ||
5711 | An annotation function can return with a different buffer current. | |
5712 | Doing so removes the annotations returned by previous functions, and | |
5713 | resets START and END to `point-min' and `point-max' of the new buffer. | |
5714 | ||
5715 | After `write-region' completes, Emacs calls the function stored in | |
5716 | `write-region-post-annotation-function', once for each buffer that was | |
5717 | current when building the annotations (i.e., at least once), with that | |
5718 | buffer current. */); | |
d6a3cc15 | 5719 | Vwrite_region_annotate_functions = Qnil; |
cd3520a4 | 5720 | DEFSYM (Qwrite_region_annotate_functions, "write-region-annotate-functions"); |
d6a3cc15 | 5721 | |
67fbc0cb | 5722 | DEFVAR_LISP ("write-region-post-annotation-function", |
29208e82 | 5723 | Vwrite_region_post_annotation_function, |
67fbc0cb CY |
5724 | doc: /* Function to call after `write-region' completes. |
5725 | The function is called with no arguments. If one or more of the | |
5726 | annotation functions in `write-region-annotate-functions' changed the | |
5727 | current buffer, the function stored in this variable is called for | |
5728 | each of those additional buffers as well, in addition to the original | |
5729 | buffer. The relevant buffer is current during each function call. */); | |
5730 | Vwrite_region_post_annotation_function = Qnil; | |
5731 | staticpro (&Vwrite_region_annotation_buffers); | |
5732 | ||
6fc6f94b | 5733 | DEFVAR_LISP ("write-region-annotations-so-far", |
29208e82 | 5734 | Vwrite_region_annotations_so_far, |
8c1a1077 PJ |
5735 | doc: /* When an annotation function is called, this holds the previous annotations. |
5736 | These are the annotations made by other annotation functions | |
5737 | that were already called. See also `write-region-annotate-functions'. */); | |
6fc6f94b RS |
5738 | Vwrite_region_annotations_so_far = Qnil; |
5739 | ||
29208e82 | 5740 | DEFVAR_LISP ("inhibit-file-name-handlers", Vinhibit_file_name_handlers, |
8c1a1077 PJ |
5741 | doc: /* A list of file name handlers that temporarily should not be used. |
5742 | This applies only to the operation `inhibit-file-name-operation'. */); | |
82c2d839 RS |
5743 | Vinhibit_file_name_handlers = Qnil; |
5744 | ||
29208e82 | 5745 | DEFVAR_LISP ("inhibit-file-name-operation", Vinhibit_file_name_operation, |
8c1a1077 | 5746 | doc: /* The operation for which `inhibit-file-name-handlers' is applicable. */); |
a65970a0 RS |
5747 | Vinhibit_file_name_operation = Qnil; |
5748 | ||
29208e82 | 5749 | DEFVAR_LISP ("auto-save-list-file-name", Vauto_save_list_file_name, |
8c1a1077 PJ |
5750 | doc: /* File name in which we write a list of all auto save file names. |
5751 | This variable is initialized automatically from `auto-save-list-file-prefix' | |
5752 | shortly after Emacs reads your `.emacs' file, if you have not yet given it | |
5753 | a non-nil value. */); | |
e54d3b5d RS |
5754 | Vauto_save_list_file_name = Qnil; |
5755 | ||
29208e82 | 5756 | DEFVAR_LISP ("auto-save-visited-file-name", Vauto_save_visited_file_name, |
699b53bc CY |
5757 | doc: /* Non-nil says auto-save a buffer in the file it is visiting, when practical. |
5758 | Normally auto-save files are written under other names. */); | |
5759 | Vauto_save_visited_file_name = Qnil; | |
5760 | ||
29208e82 | 5761 | DEFVAR_LISP ("auto-save-include-big-deletions", Vauto_save_include_big_deletions, |
090101cf CY |
5762 | doc: /* If non-nil, auto-save even if a large part of the text is deleted. |
5763 | If nil, deleting a substantial portion of the text disables auto-save | |
5764 | in the buffer; this is the default behavior, because the auto-save | |
5765 | file is usually more useful if it contains the deleted text. */); | |
5766 | Vauto_save_include_big_deletions = Qnil; | |
5767 | ||
ccf61795 | 5768 | #ifdef HAVE_FSYNC |
29208e82 | 5769 | DEFVAR_BOOL ("write-region-inhibit-fsync", write_region_inhibit_fsync, |
fb7ada5f | 5770 | doc: /* Non-nil means don't call fsync in `write-region'. |
e3f509dd RF |
5771 | This variable affects calls to `write-region' as well as save commands. |
5772 | A non-nil value may result in data loss! */); | |
ccf61795 RF |
5773 | write_region_inhibit_fsync = 0; |
5774 | #endif | |
5775 | ||
29208e82 | 5776 | DEFVAR_BOOL ("delete-by-moving-to-trash", delete_by_moving_to_trash, |
6cf29fe8 | 5777 | doc: /* Specifies whether to use the system's trash can. |
f1a5d776 CY |
5778 | When non-nil, certain file deletion commands use the function |
5779 | `move-file-to-trash' instead of deleting files outright. | |
5780 | This includes interactive calls to `delete-file' and | |
5781 | `delete-directory' and the Dired deletion commands. */); | |
6cf29fe8 | 5782 | delete_by_moving_to_trash = 0; |
d67b4f80 | 5783 | Qdelete_by_moving_to_trash = intern_c_string ("delete-by-moving-to-trash"); |
cd3520a4 JB |
5784 | |
5785 | DEFSYM (Qmove_file_to_trash, "move-file-to-trash"); | |
5786 | DEFSYM (Qcopy_directory, "copy-directory"); | |
5787 | DEFSYM (Qdelete_directory, "delete-directory"); | |
6cf29fe8 | 5788 | |
642ef245 | 5789 | defsubr (&Sfind_file_name_handler); |
570d7624 JB |
5790 | defsubr (&Sfile_name_directory); |
5791 | defsubr (&Sfile_name_nondirectory); | |
642ef245 | 5792 | defsubr (&Sunhandled_file_name_directory); |
570d7624 JB |
5793 | defsubr (&Sfile_name_as_directory); |
5794 | defsubr (&Sdirectory_file_name); | |
5795 | defsubr (&Smake_temp_name); | |
5796 | defsubr (&Sexpand_file_name); | |
5797 | defsubr (&Ssubstitute_in_file_name); | |
5798 | defsubr (&Scopy_file); | |
9bbe01fb | 5799 | defsubr (&Smake_directory_internal); |
9d8f3bd9 | 5800 | defsubr (&Sdelete_directory_internal); |
570d7624 JB |
5801 | defsubr (&Sdelete_file); |
5802 | defsubr (&Srename_file); | |
5803 | defsubr (&Sadd_name_to_file); | |
570d7624 | 5804 | defsubr (&Smake_symbolic_link); |
570d7624 JB |
5805 | defsubr (&Sfile_name_absolute_p); |
5806 | defsubr (&Sfile_exists_p); | |
5807 | defsubr (&Sfile_executable_p); | |
5808 | defsubr (&Sfile_readable_p); | |
5809 | defsubr (&Sfile_writable_p); | |
1f8653eb | 5810 | defsubr (&Saccess_file); |
570d7624 JB |
5811 | defsubr (&Sfile_symlink_p); |
5812 | defsubr (&Sfile_directory_p); | |
b72dea2a | 5813 | defsubr (&Sfile_accessible_directory_p); |
f793dc6c | 5814 | defsubr (&Sfile_regular_p); |
570d7624 JB |
5815 | defsubr (&Sfile_modes); |
5816 | defsubr (&Sset_file_modes); | |
819da85b | 5817 | defsubr (&Sset_file_times); |
574c05e2 KK |
5818 | defsubr (&Sfile_selinux_context); |
5819 | defsubr (&Sset_file_selinux_context); | |
c24e9a53 RS |
5820 | defsubr (&Sset_default_file_modes); |
5821 | defsubr (&Sdefault_file_modes); | |
570d7624 JB |
5822 | defsubr (&Sfile_newer_than_file_p); |
5823 | defsubr (&Sinsert_file_contents); | |
5824 | defsubr (&Swrite_region); | |
d6a3cc15 | 5825 | defsubr (&Scar_less_than_car); |
570d7624 JB |
5826 | defsubr (&Sverify_visited_file_modtime); |
5827 | defsubr (&Sclear_visited_file_modtime); | |
f5d5eccf | 5828 | defsubr (&Svisited_file_modtime); |
570d7624 JB |
5829 | defsubr (&Sset_visited_file_modtime); |
5830 | defsubr (&Sdo_auto_save); | |
5831 | defsubr (&Sset_buffer_auto_saved); | |
b60247d9 | 5832 | defsubr (&Sclear_buffer_auto_save_failure); |
570d7624 JB |
5833 | defsubr (&Srecent_auto_save_p); |
5834 | ||
88208bb8 | 5835 | defsubr (&Snext_read_file_uses_dialog_p); |
85ffea93 | 5836 | |
697c17a2 | 5837 | #ifdef HAVE_SYNC |
85ffea93 | 5838 | defsubr (&Sunix_sync); |
483a2e10 | 5839 | #endif |
570d7624 | 5840 | } |