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 | |
c1558952 TTN |
87 | #ifndef FILE_SYSTEM_CASE |
88 | #define FILE_SYSTEM_CASE(filename) (filename) | |
89 | #endif | |
90 | ||
71873e2b | 91 | /* Nonzero during writing of auto-save files. */ |
5045092b | 92 | static int auto_saving; |
570d7624 | 93 | |
71873e2b | 94 | /* Nonzero umask during creation of auto-save directories. */ |
09450bae PE |
95 | static int auto_saving_dir_umask; |
96 | ||
570d7624 | 97 | /* Set by auto_save_1 to mode of original file so Fwrite_region will create |
71873e2b | 98 | a new file with the same mode as the original. */ |
5045092b | 99 | static int auto_save_mode_bits; |
570d7624 | 100 | |
71873e2b | 101 | /* Set by auto_save_1 if an error occurred during the last auto-save. */ |
5045092b | 102 | static int auto_save_error_occurred; |
ca730bf0 | 103 | |
356a6224 KH |
104 | /* The symbol bound to coding-system-for-read when |
105 | insert-file-contents is called for recovering a file. This is not | |
106 | an actual coding system name, but just an indicator to tell | |
107 | insert-file-contents to use `emacs-mule' with a special flag for | |
108 | auto saving and recovering a file. */ | |
955cbe7b | 109 | static Lisp_Object Qauto_save_coding; |
356a6224 | 110 | |
f6c9b683 RS |
111 | /* Property name of a file name handler, |
112 | which gives a list of operations it handles.. */ | |
955cbe7b | 113 | static Lisp_Object Qoperations; |
f6c9b683 | 114 | |
71873e2b | 115 | /* Lisp functions for translating file formats. */ |
955cbe7b | 116 | static Lisp_Object Qformat_decode, Qformat_annotate_function; |
0d420e88 | 117 | |
2080470e | 118 | /* Lisp function for setting buffer-file-coding-system and the |
b6426b03 | 119 | multibyteness of the current buffer after inserting a file. */ |
955cbe7b | 120 | static Lisp_Object Qafter_insert_file_set_coding; |
b6426b03 | 121 | |
955cbe7b | 122 | static Lisp_Object Qwrite_region_annotate_functions; |
67fbc0cb CY |
123 | /* Each time an annotation function changes the buffer, the new buffer |
124 | is added here. */ | |
5045092b | 125 | static Lisp_Object Vwrite_region_annotation_buffers; |
67fbc0cb | 126 | |
ccf61795 | 127 | #ifdef HAVE_FSYNC |
ccf61795 RF |
128 | #endif |
129 | ||
955cbe7b | 130 | static Lisp_Object Qdelete_by_moving_to_trash; |
d2b66acf | 131 | |
6cf29fe8 | 132 | /* Lisp function for moving files to trash. */ |
955cbe7b | 133 | static Lisp_Object Qmove_file_to_trash; |
6cf29fe8 | 134 | |
8719abec | 135 | /* Lisp function for recursively copying directories. */ |
955cbe7b | 136 | static Lisp_Object Qcopy_directory; |
8719abec CY |
137 | |
138 | /* Lisp function for recursively deleting directories. */ | |
955cbe7b | 139 | static Lisp_Object Qdelete_directory; |
8719abec | 140 | |
c1c4693e | 141 | #ifdef WINDOWSNT |
c1c4693e RS |
142 | #endif |
143 | ||
955cbe7b PE |
144 | Lisp_Object Qfile_error; |
145 | static Lisp_Object Qfile_already_exists, Qfile_date_error; | |
146 | static Lisp_Object Qexcl; | |
15c65264 RS |
147 | Lisp_Object Qfile_name_history; |
148 | ||
955cbe7b | 149 | static Lisp_Object Qcar_less_than_car; |
d6a3cc15 | 150 | |
d311d28c | 151 | static int a_write (int, Lisp_Object, ptrdiff_t, ptrdiff_t, |
f57e2426 | 152 | Lisp_Object *, struct coding_system *); |
d311d28c | 153 | static int e_write (int, Lisp_Object, ptrdiff_t, ptrdiff_t, |
8a2cbd72 | 154 | struct coding_system *); |
ce51c54c | 155 | |
ec7adf26 | 156 | \f |
5d01d666 | 157 | void |
971de7fb | 158 | report_file_error (const char *string, Lisp_Object data) |
570d7624 JB |
159 | { |
160 | Lisp_Object errstring; | |
505ab9bc | 161 | int errorno = errno; |
d7259fdb | 162 | char *str; |
570d7624 | 163 | |
ca9c0567 | 164 | synchronize_system_messages_locale (); |
d7259fdb KH |
165 | str = strerror (errorno); |
166 | errstring = code_convert_string_norecord (make_unibyte_string (str, | |
167 | strlen (str)), | |
68c45bf0 PE |
168 | Vlocale_coding_system, 0); |
169 | ||
570d7624 | 170 | while (1) |
505ab9bc RS |
171 | switch (errorno) |
172 | { | |
173 | case EEXIST: | |
24b1ddad | 174 | xsignal (Qfile_already_exists, Fcons (errstring, data)); |
505ab9bc RS |
175 | break; |
176 | default: | |
177 | /* System error messages are capitalized. Downcase the initial | |
39824137 EZ |
178 | unless it is followed by a slash. (The slash case caters to |
179 | error messages that begin with "I/O" or, in German, "E/A".) */ | |
d5443ffd KH |
180 | if (STRING_MULTIBYTE (errstring) |
181 | && ! EQ (Faref (errstring, make_number (1)), make_number ('/'))) | |
6c0969ca KH |
182 | { |
183 | int c; | |
184 | ||
51b59d79 | 185 | str = SSDATA (errstring); |
5976c3fe | 186 | c = STRING_CHAR ((unsigned char *) str); |
5da9919f | 187 | Faset (errstring, make_number (0), make_number (downcase (c))); |
6c0969ca | 188 | } |
505ab9bc | 189 | |
24b1ddad | 190 | xsignal (Qfile_error, |
505ab9bc RS |
191 | Fcons (build_string (string), Fcons (errstring, data))); |
192 | } | |
570d7624 | 193 | } |
b5148e85 | 194 | |
b27a1703 | 195 | Lisp_Object |
971de7fb | 196 | close_file_unwind (Lisp_Object fd) |
b5148e85 | 197 | { |
68c45bf0 | 198 | emacs_close (XFASTINT (fd)); |
b27a1703 | 199 | return Qnil; |
b5148e85 | 200 | } |
a1d2b64a RS |
201 | |
202 | /* Restore point, having saved it as a marker. */ | |
203 | ||
5dcde606 | 204 | Lisp_Object |
971de7fb | 205 | restore_point_unwind (Lisp_Object location) |
a1d2b64a | 206 | { |
ec7adf26 | 207 | Fgoto_char (location); |
a1d2b64a | 208 | Fset_marker (location, Qnil, Qnil); |
b27a1703 | 209 | return Qnil; |
a1d2b64a | 210 | } |
59c94f03 | 211 | |
570d7624 | 212 | \f |
955cbe7b PE |
213 | static Lisp_Object Qexpand_file_name; |
214 | static Lisp_Object Qsubstitute_in_file_name; | |
215 | static Lisp_Object Qdirectory_file_name; | |
216 | static Lisp_Object Qfile_name_directory; | |
217 | static Lisp_Object Qfile_name_nondirectory; | |
218 | static Lisp_Object Qunhandled_file_name_directory; | |
219 | static Lisp_Object Qfile_name_as_directory; | |
220 | static Lisp_Object Qcopy_file; | |
221 | static Lisp_Object Qmake_directory_internal; | |
222 | static Lisp_Object Qmake_directory; | |
223 | static Lisp_Object Qdelete_directory_internal; | |
32f4334d | 224 | Lisp_Object Qdelete_file; |
955cbe7b PE |
225 | static Lisp_Object Qrename_file; |
226 | static Lisp_Object Qadd_name_to_file; | |
227 | static Lisp_Object Qmake_symbolic_link; | |
32f4334d | 228 | Lisp_Object Qfile_exists_p; |
955cbe7b PE |
229 | static Lisp_Object Qfile_executable_p; |
230 | static Lisp_Object Qfile_readable_p; | |
231 | static Lisp_Object Qfile_writable_p; | |
232 | static Lisp_Object Qfile_symlink_p; | |
233 | static Lisp_Object Qaccess_file; | |
32f4334d | 234 | Lisp_Object Qfile_directory_p; |
955cbe7b PE |
235 | static Lisp_Object Qfile_regular_p; |
236 | static Lisp_Object Qfile_accessible_directory_p; | |
237 | static Lisp_Object Qfile_modes; | |
238 | static Lisp_Object Qset_file_modes; | |
239 | static Lisp_Object Qset_file_times; | |
240 | static Lisp_Object Qfile_selinux_context; | |
241 | static Lisp_Object Qset_file_selinux_context; | |
242 | static Lisp_Object Qfile_newer_than_file_p; | |
32f4334d RS |
243 | Lisp_Object Qinsert_file_contents; |
244 | Lisp_Object Qwrite_region; | |
955cbe7b PE |
245 | static Lisp_Object Qverify_visited_file_modtime; |
246 | static Lisp_Object Qset_visited_file_modtime; | |
32f4334d | 247 | |
a7ca3326 | 248 | DEFUN ("find-file-name-handler", Ffind_file_name_handler, |
16a97296 | 249 | Sfind_file_name_handler, 2, 2, 0, |
8c1a1077 PJ |
250 | doc: /* Return FILENAME's handler function for OPERATION, if it has one. |
251 | Otherwise, return nil. | |
252 | A file name is handled if one of the regular expressions in | |
253 | `file-name-handler-alist' matches it. | |
254 | ||
255 | If OPERATION equals `inhibit-file-name-operation', then we ignore | |
256 | any handlers that are members of `inhibit-file-name-handlers', | |
257 | but we still do run any other handlers. This lets handlers | |
258 | use the standard functions without calling themselves recursively. */) | |
5842a27b | 259 | (Lisp_Object filename, Lisp_Object operation) |
32f4334d | 260 | { |
642ef245 | 261 | /* This function must not munge the match data. */ |
204ee271 | 262 | Lisp_Object chain, inhibited_handlers, result; |
d311d28c | 263 | ptrdiff_t pos = -1; |
642ef245 | 264 | |
204ee271 | 265 | result = Qnil; |
b7826503 | 266 | CHECK_STRING (filename); |
e4432095 | 267 | |
a65970a0 RS |
268 | if (EQ (operation, Vinhibit_file_name_operation)) |
269 | inhibited_handlers = Vinhibit_file_name_handlers; | |
270 | else | |
271 | inhibited_handlers = Qnil; | |
82c2d839 | 272 | |
93c30b5f | 273 | for (chain = Vfile_name_handler_alist; CONSP (chain); |
03699b14 | 274 | chain = XCDR (chain)) |
32f4334d RS |
275 | { |
276 | Lisp_Object elt; | |
03699b14 | 277 | elt = XCAR (chain); |
93c30b5f | 278 | if (CONSP (elt)) |
32f4334d | 279 | { |
f6c9b683 | 280 | Lisp_Object string = XCAR (elt); |
d311d28c | 281 | ptrdiff_t match_pos; |
f6c9b683 | 282 | Lisp_Object handler = XCDR (elt); |
68780e2a RS |
283 | Lisp_Object operations = Qnil; |
284 | ||
285 | if (SYMBOLP (handler)) | |
286 | operations = Fget (handler, Qoperations); | |
f6c9b683 | 287 | |
8d2ced53 | 288 | if (STRINGP (string) |
f6c9b683 RS |
289 | && (match_pos = fast_string_match (string, filename)) > pos |
290 | && (NILP (operations) || ! NILP (Fmemq (operation, operations)))) | |
a65970a0 | 291 | { |
f6c9b683 | 292 | Lisp_Object tem; |
a65970a0 | 293 | |
03699b14 | 294 | handler = XCDR (elt); |
a65970a0 RS |
295 | tem = Fmemq (handler, inhibited_handlers); |
296 | if (NILP (tem)) | |
8d2ced53 SM |
297 | { |
298 | result = handler; | |
299 | pos = match_pos; | |
300 | } | |
a65970a0 | 301 | } |
32f4334d | 302 | } |
642ef245 JB |
303 | |
304 | QUIT; | |
32f4334d | 305 | } |
8d2ced53 | 306 | return result; |
32f4334d RS |
307 | } |
308 | \f | |
a7ca3326 | 309 | DEFUN ("file-name-directory", Ffile_name_directory, Sfile_name_directory, |
8c1a1077 PJ |
310 | 1, 1, 0, |
311 | doc: /* Return the directory component in file name FILENAME. | |
312 | Return nil if FILENAME does not include a directory. | |
78379264 | 313 | Otherwise return a directory name. |
7c2fb837 | 314 | Given a Unix syntax file name, returns a string ending in slash. */) |
5842a27b | 315 | (Lisp_Object filename) |
570d7624 | 316 | { |
100c44b7 | 317 | #ifndef DOS_NT |
5976c3fe | 318 | register const char *beg; |
100c44b7 | 319 | #else |
5976c3fe | 320 | register char *beg; |
100c44b7 | 321 | #endif |
5976c3fe | 322 | register const char *p; |
0bf2eed2 | 323 | Lisp_Object handler; |
570d7624 | 324 | |
b7826503 | 325 | CHECK_STRING (filename); |
570d7624 | 326 | |
0bf2eed2 RS |
327 | /* If the file name has special constructs in it, |
328 | call the corresponding file handler. */ | |
3b7f6e60 | 329 | handler = Ffind_file_name_handler (filename, Qfile_name_directory); |
0bf2eed2 | 330 | if (!NILP (handler)) |
2375c96a CY |
331 | { |
332 | Lisp_Object handled_name = call2 (handler, Qfile_name_directory, | |
333 | filename); | |
334 | return STRINGP (handled_name) ? handled_name : Qnil; | |
335 | } | |
0bf2eed2 | 336 | |
3b7f6e60 | 337 | filename = FILE_SYSTEM_CASE (filename); |
199607e4 | 338 | #ifdef DOS_NT |
38182d90 | 339 | beg = alloca (SBYTES (filename) + 1); |
5976c3fe | 340 | memcpy (beg, SSDATA (filename), SBYTES (filename) + 1); |
0f3f018c | 341 | #else |
5976c3fe | 342 | beg = SSDATA (filename); |
199607e4 | 343 | #endif |
d5db4077 | 344 | p = beg + SBYTES (filename); |
570d7624 | 345 | |
199607e4 | 346 | while (p != beg && !IS_DIRECTORY_SEP (p[-1]) |
199607e4 | 347 | #ifdef DOS_NT |
e1dbe924 | 348 | /* only recognize drive specifier at the beginning */ |
ba14e174 RS |
349 | && !(p[-1] == ':' |
350 | /* handle the "/:d:foo" and "/:foo" cases correctly */ | |
351 | && ((p == beg + 2 && !IS_DIRECTORY_SEP (*beg)) | |
352 | || (p == beg + 4 && IS_DIRECTORY_SEP (*beg)))) | |
199607e4 | 353 | #endif |
570d7624 JB |
354 | ) p--; |
355 | ||
356 | if (p == beg) | |
357 | return Qnil; | |
5e570b75 | 358 | #ifdef DOS_NT |
4c3c22f3 | 359 | /* Expansion of "c:" to drive and default directory. */ |
ba14e174 | 360 | if (p[-1] == ':') |
4c3c22f3 | 361 | { |
4c3c22f3 | 362 | /* MAXPATHLEN+1 is guaranteed to be enough space for getdefdir. */ |
5976c3fe PE |
363 | char *res = alloca (MAXPATHLEN + 1); |
364 | char *r = res; | |
ba14e174 RS |
365 | |
366 | if (p == beg + 4 && IS_DIRECTORY_SEP (*beg) && beg[1] == ':') | |
367 | { | |
368 | strncpy (res, beg, 2); | |
369 | beg += 2; | |
370 | r += 2; | |
371 | } | |
372 | ||
5976c3fe | 373 | if (getdefdir (toupper ((unsigned char) *beg) - 'A' + 1, r)) |
4c3c22f3 | 374 | { |
199607e4 | 375 | if (!IS_DIRECTORY_SEP (res[strlen (res) - 1])) |
4c3c22f3 RS |
376 | strcat (res, "/"); |
377 | beg = res; | |
378 | p = beg + strlen (beg); | |
379 | } | |
380 | } | |
087fc47a | 381 | dostounix_filename (beg); |
5e570b75 | 382 | #endif /* DOS_NT */ |
60d67b83 | 383 | |
d7231f93 | 384 | return make_specified_string (beg, -1, p - beg, STRING_MULTIBYTE (filename)); |
570d7624 JB |
385 | } |
386 | ||
a7ca3326 | 387 | DEFUN ("file-name-nondirectory", Ffile_name_nondirectory, |
60d67b83 | 388 | Sfile_name_nondirectory, 1, 1, 0, |
8c1a1077 PJ |
389 | doc: /* Return file name FILENAME sans its directory. |
390 | For example, in a Unix-syntax file name, | |
391 | this is everything after the last slash, | |
392 | or the entire name if it contains no slash. */) | |
5842a27b | 393 | (Lisp_Object filename) |
570d7624 | 394 | { |
5976c3fe | 395 | register const char *beg, *p, *end; |
0bf2eed2 | 396 | Lisp_Object handler; |
570d7624 | 397 | |
b7826503 | 398 | CHECK_STRING (filename); |
570d7624 | 399 | |
0bf2eed2 RS |
400 | /* If the file name has special constructs in it, |
401 | call the corresponding file handler. */ | |
3b7f6e60 | 402 | handler = Ffind_file_name_handler (filename, Qfile_name_nondirectory); |
0bf2eed2 | 403 | if (!NILP (handler)) |
2375c96a CY |
404 | { |
405 | Lisp_Object handled_name = call2 (handler, Qfile_name_nondirectory, | |
406 | filename); | |
407 | if (STRINGP (handled_name)) | |
408 | return handled_name; | |
409 | error ("Invalid handler in `file-name-handler-alist'"); | |
410 | } | |
0bf2eed2 | 411 | |
5976c3fe | 412 | beg = SSDATA (filename); |
d5db4077 | 413 | end = p = beg + SBYTES (filename); |
570d7624 | 414 | |
199607e4 | 415 | while (p != beg && !IS_DIRECTORY_SEP (p[-1]) |
199607e4 | 416 | #ifdef DOS_NT |
e1dbe924 | 417 | /* only recognize drive specifier at beginning */ |
ba14e174 RS |
418 | && !(p[-1] == ':' |
419 | /* handle the "/:d:foo" case correctly */ | |
420 | && (p == beg + 2 || (p == beg + 4 && IS_DIRECTORY_SEP (*beg)))) | |
199607e4 | 421 | #endif |
60d67b83 RS |
422 | ) |
423 | p--; | |
570d7624 | 424 | |
d7231f93 | 425 | return make_specified_string (p, -1, end - p, STRING_MULTIBYTE (filename)); |
570d7624 | 426 | } |
642ef245 | 427 | |
a7ca3326 | 428 | DEFUN ("unhandled-file-name-directory", Funhandled_file_name_directory, |
60d67b83 | 429 | Sunhandled_file_name_directory, 1, 1, 0, |
8c1a1077 PJ |
430 | doc: /* Return a directly usable directory name somehow associated with FILENAME. |
431 | A `directly usable' directory name is one that may be used without the | |
432 | intervention of any file handler. | |
433 | If FILENAME is a directly usable file itself, return | |
434 | \(file-name-directory FILENAME). | |
ca319910 SM |
435 | If FILENAME refers to a file which is not accessible from a local process, |
436 | then this should return nil. | |
8c1a1077 PJ |
437 | The `call-process' and `start-process' functions use this function to |
438 | get a current directory to run processes in. */) | |
5842a27b | 439 | (Lisp_Object filename) |
642ef245 JB |
440 | { |
441 | Lisp_Object handler; | |
442 | ||
443 | /* If the file name has special constructs in it, | |
444 | call the corresponding file handler. */ | |
49307295 | 445 | handler = Ffind_file_name_handler (filename, Qunhandled_file_name_directory); |
642ef245 | 446 | if (!NILP (handler)) |
2375c96a CY |
447 | { |
448 | Lisp_Object handled_name = call2 (handler, Qunhandled_file_name_directory, | |
449 | filename); | |
450 | return STRINGP (handled_name) ? handled_name : Qnil; | |
451 | } | |
642ef245 JB |
452 | |
453 | return Ffile_name_directory (filename); | |
454 | } | |
455 | ||
c293e30c DA |
456 | /* Convert from file name SRC of length SRCLEN to directory name |
457 | in DST. On UNIX, just make sure there is a terminating /. | |
458 | Return the length of DST. */ | |
570d7624 | 459 | |
c293e30c DA |
460 | static ptrdiff_t |
461 | file_name_as_directory (char *dst, const char *src, ptrdiff_t srclen) | |
462 | { | |
463 | if (srclen == 0) | |
8aa3a244 | 464 | { |
c293e30c DA |
465 | dst[0] = '.'; |
466 | dst[1] = '/'; | |
467 | dst[2] = '\0'; | |
468 | return 2; | |
8aa3a244 RS |
469 | } |
470 | ||
c293e30c | 471 | strcpy (dst, src); |
93f4cf88 | 472 | |
c293e30c | 473 | if (!IS_DIRECTORY_SEP (dst[srclen - 1])) |
5e570b75 | 474 | { |
c293e30c DA |
475 | dst[srclen] = DIRECTORY_SEP; |
476 | dst[srclen + 1] = '\0'; | |
477 | srclen++; | |
5e570b75 | 478 | } |
199607e4 | 479 | #ifdef DOS_NT |
c293e30c | 480 | dostounix_filename (dst); |
199607e4 | 481 | #endif |
c293e30c | 482 | return srclen; |
570d7624 JB |
483 | } |
484 | ||
a7ca3326 | 485 | DEFUN ("file-name-as-directory", Ffile_name_as_directory, |
570d7624 | 486 | Sfile_name_as_directory, 1, 1, 0, |
0dac4f85 | 487 | doc: /* Return a string representing the file name FILE interpreted as a directory. |
8c1a1077 PJ |
488 | This operation exists because a directory is also a file, but its name as |
489 | a directory is different from its name as a file. | |
490 | The result can be used as the value of `default-directory' | |
491 | or passed as second argument to `expand-file-name'. | |
7c2fb837 | 492 | For a Unix-syntax file name, just appends a slash. */) |
5842a27b | 493 | (Lisp_Object file) |
570d7624 JB |
494 | { |
495 | char *buf; | |
c293e30c | 496 | ptrdiff_t length; |
0bf2eed2 | 497 | Lisp_Object handler; |
570d7624 | 498 | |
b7826503 | 499 | CHECK_STRING (file); |
265a9e55 | 500 | if (NILP (file)) |
570d7624 | 501 | return Qnil; |
0bf2eed2 RS |
502 | |
503 | /* If the file name has special constructs in it, | |
504 | call the corresponding file handler. */ | |
49307295 | 505 | handler = Ffind_file_name_handler (file, Qfile_name_as_directory); |
0bf2eed2 | 506 | if (!NILP (handler)) |
2375c96a CY |
507 | { |
508 | Lisp_Object handled_name = call2 (handler, Qfile_name_as_directory, | |
509 | file); | |
510 | if (STRINGP (handled_name)) | |
511 | return handled_name; | |
512 | error ("Invalid handler in `file-name-handler-alist'"); | |
513 | } | |
0bf2eed2 | 514 | |
38182d90 | 515 | buf = alloca (SBYTES (file) + 10); |
c293e30c DA |
516 | length = file_name_as_directory (buf, SSDATA (file), SBYTES (file)); |
517 | return make_specified_string (buf, -1, length, STRING_MULTIBYTE (file)); | |
570d7624 JB |
518 | } |
519 | \f | |
c293e30c DA |
520 | /* Convert from directory name SRC of length SRCLEN to |
521 | file name in DST. On UNIX, just make sure there isn't | |
522 | a terminating /. Return the length of DST. */ | |
570d7624 | 523 | |
c293e30c DA |
524 | static ptrdiff_t |
525 | directory_file_name (char *dst, char *src, ptrdiff_t srclen) | |
570d7624 | 526 | { |
570d7624 JB |
527 | /* Process as Unix format: just remove any final slash. |
528 | But leave "/" unchanged; do not change it to "". */ | |
529 | strcpy (dst, src); | |
c293e30c DA |
530 | if (srclen > 1 |
531 | && IS_DIRECTORY_SEP (dst[srclen - 1]) | |
4592782e | 532 | #ifdef DOS_NT |
c293e30c | 533 | && !IS_ANY_SEP (dst[srclen - 2]) |
4592782e RS |
534 | #endif |
535 | ) | |
c293e30c DA |
536 | { |
537 | dst[srclen - 1] = 0; | |
538 | srclen--; | |
539 | } | |
199607e4 | 540 | #ifdef DOS_NT |
087fc47a | 541 | dostounix_filename (dst); |
125feee8 | 542 | #endif |
c293e30c | 543 | return srclen; |
570d7624 JB |
544 | } |
545 | ||
a7ca3326 | 546 | DEFUN ("directory-file-name", Fdirectory_file_name, Sdirectory_file_name, |
8c1a1077 PJ |
547 | 1, 1, 0, |
548 | doc: /* Returns the file name of the directory named DIRECTORY. | |
549 | This is the name of the file that holds the data for the directory DIRECTORY. | |
550 | This operation exists because a directory is also a file, but its name as | |
551 | a directory is different from its name as a file. | |
7c2fb837 | 552 | In Unix-syntax, this function just removes the final slash. */) |
5842a27b | 553 | (Lisp_Object directory) |
570d7624 JB |
554 | { |
555 | char *buf; | |
c293e30c | 556 | ptrdiff_t length; |
0bf2eed2 | 557 | Lisp_Object handler; |
570d7624 | 558 | |
b7826503 | 559 | CHECK_STRING (directory); |
570d7624 | 560 | |
265a9e55 | 561 | if (NILP (directory)) |
570d7624 | 562 | return Qnil; |
0bf2eed2 RS |
563 | |
564 | /* If the file name has special constructs in it, | |
565 | call the corresponding file handler. */ | |
49307295 | 566 | handler = Ffind_file_name_handler (directory, Qdirectory_file_name); |
0bf2eed2 | 567 | if (!NILP (handler)) |
2375c96a CY |
568 | { |
569 | Lisp_Object handled_name = call2 (handler, Qdirectory_file_name, | |
570 | directory); | |
571 | if (STRINGP (handled_name)) | |
572 | return handled_name; | |
573 | error ("Invalid handler in `file-name-handler-alist'"); | |
574 | } | |
0bf2eed2 | 575 | |
38182d90 | 576 | buf = alloca (SBYTES (directory) + 20); |
c293e30c DA |
577 | length = directory_file_name (buf, SSDATA (directory), SBYTES (directory)); |
578 | return make_specified_string (buf, -1, length, STRING_MULTIBYTE (directory)); | |
570d7624 JB |
579 | } |
580 | ||
91433552 | 581 | static const char make_temp_name_tbl[64] = |
3ce839e4 RS |
582 | { |
583 | 'A','B','C','D','E','F','G','H', | |
584 | 'I','J','K','L','M','N','O','P', | |
585 | 'Q','R','S','T','U','V','W','X', | |
586 | 'Y','Z','a','b','c','d','e','f', | |
587 | 'g','h','i','j','k','l','m','n', | |
588 | 'o','p','q','r','s','t','u','v', | |
589 | 'w','x','y','z','0','1','2','3', | |
590 | '4','5','6','7','8','9','-','_' | |
591 | }; | |
cb613bb8 | 592 | |
3ce839e4 RS |
593 | static unsigned make_temp_name_count, make_temp_name_count_initialized_p; |
594 | ||
cb613bb8 | 595 | /* Value is a temporary file name starting with PREFIX, a string. |
efdc16c9 | 596 | |
cb613bb8 GM |
597 | The Emacs process number forms part of the result, so there is |
598 | no danger of generating a name being used by another process. | |
599 | In addition, this function makes an attempt to choose a name | |
600 | which has no existing file. To make this work, PREFIX should be | |
601 | an absolute file name. | |
efdc16c9 | 602 | |
cb613bb8 GM |
603 | BASE64_P non-zero means add the pid as 3 characters in base64 |
604 | encoding. In this case, 6 characters will be added to PREFIX to | |
605 | form the file name. Otherwise, if Emacs is running on a system | |
606 | with long file names, add the pid as a decimal number. | |
607 | ||
608 | This function signals an error if no unique file name could be | |
609 | generated. */ | |
610 | ||
611 | Lisp_Object | |
971de7fb | 612 | make_temp_name (Lisp_Object prefix, int base64_p) |
570d7624 JB |
613 | { |
614 | Lisp_Object val; | |
0cedd530 | 615 | int len, clen; |
a81d11a3 | 616 | printmax_t pid; |
5976c3fe | 617 | char *p, *data; |
a81d11a3 | 618 | char pidbuf[INT_BUFSIZE_BOUND (printmax_t)]; |
3ce839e4 | 619 | int pidlen; |
efdc16c9 | 620 | |
b7826503 | 621 | CHECK_STRING (prefix); |
3ce839e4 RS |
622 | |
623 | /* VAL is created by adding 6 characters to PREFIX. The first | |
624 | three are the PID of this process, in base 64, and the second | |
625 | three are incremented if the file already exists. This ensures | |
626 | 262144 unique file names per PID per PREFIX. */ | |
627 | ||
93f4cf88 | 628 | pid = getpid (); |
3ce839e4 | 629 | |
cb613bb8 GM |
630 | if (base64_p) |
631 | { | |
632 | pidbuf[0] = make_temp_name_tbl[pid & 63], pid >>= 6; | |
633 | pidbuf[1] = make_temp_name_tbl[pid & 63], pid >>= 6; | |
634 | pidbuf[2] = make_temp_name_tbl[pid & 63], pid >>= 6; | |
635 | pidlen = 3; | |
636 | } | |
637 | else | |
638 | { | |
3ce839e4 | 639 | #ifdef HAVE_LONG_FILE_NAMES |
a81d11a3 | 640 | pidlen = sprintf (pidbuf, "%"pMd, pid); |
3a3bfb18 | 641 | #else |
cb613bb8 GM |
642 | pidbuf[0] = make_temp_name_tbl[pid & 63], pid >>= 6; |
643 | pidbuf[1] = make_temp_name_tbl[pid & 63], pid >>= 6; | |
644 | pidbuf[2] = make_temp_name_tbl[pid & 63], pid >>= 6; | |
645 | pidlen = 3; | |
3ce839e4 | 646 | #endif |
cb613bb8 | 647 | } |
efdc16c9 | 648 | |
0cedd530 SM |
649 | len = SBYTES (prefix); clen = SCHARS (prefix); |
650 | val = make_uninit_multibyte_string (clen + 3 + pidlen, len + 3 + pidlen); | |
651 | if (!STRING_MULTIBYTE (prefix)) | |
652 | STRING_SET_UNIBYTE (val); | |
5976c3fe PE |
653 | data = SSDATA (val); |
654 | memcpy (data, SSDATA (prefix), len); | |
3ce839e4 RS |
655 | p = data + len; |
656 | ||
72af86bd | 657 | memcpy (p, pidbuf, pidlen); |
3ce839e4 RS |
658 | p += pidlen; |
659 | ||
660 | /* Here we try to minimize useless stat'ing when this function is | |
661 | invoked many times successively with the same PREFIX. We achieve | |
662 | this by initializing count to a random value, and incrementing it | |
f6a492a9 RS |
663 | afterwards. |
664 | ||
665 | We don't want make-temp-name to be called while dumping, | |
666 | because then make_temp_name_count_initialized_p would get set | |
667 | and then make_temp_name_count would not be set when Emacs starts. */ | |
668 | ||
3ce839e4 RS |
669 | if (!make_temp_name_count_initialized_p) |
670 | { | |
327eeec8 | 671 | make_temp_name_count = time (NULL); |
3ce839e4 RS |
672 | make_temp_name_count_initialized_p = 1; |
673 | } | |
674 | ||
675 | while (1) | |
676 | { | |
677 | struct stat ignored; | |
8a7777fc | 678 | unsigned num = make_temp_name_count; |
3ce839e4 RS |
679 | |
680 | p[0] = make_temp_name_tbl[num & 63], num >>= 6; | |
681 | p[1] = make_temp_name_tbl[num & 63], num >>= 6; | |
682 | p[2] = make_temp_name_tbl[num & 63], num >>= 6; | |
683 | ||
8a7777fc RS |
684 | /* Poor man's congruential RN generator. Replace with |
685 | ++make_temp_name_count for debugging. */ | |
686 | make_temp_name_count += 25229; | |
687 | make_temp_name_count %= 225307; | |
688 | ||
3ce839e4 RS |
689 | if (stat (data, &ignored) < 0) |
690 | { | |
691 | /* We want to return only if errno is ENOENT. */ | |
692 | if (errno == ENOENT) | |
693 | return val; | |
694 | else | |
695 | /* The error here is dubious, but there is little else we | |
696 | can do. The alternatives are to return nil, which is | |
697 | as bad as (and in many cases worse than) throwing the | |
698 | error, or to ignore the error, which will likely result | |
8a7777fc | 699 | in looping through 225307 stat's, which is not only |
410ed5c3 PE |
700 | dog-slow, but also useless since eventually nil would |
701 | have to be returned anyway. */ | |
9869bb0b | 702 | report_file_error ("Cannot create temporary name for prefix", |
3ce839e4 RS |
703 | Fcons (prefix, Qnil)); |
704 | /* not reached */ | |
705 | } | |
706 | } | |
570d7624 | 707 | } |
3ce839e4 | 708 | |
cb613bb8 GM |
709 | |
710 | DEFUN ("make-temp-name", Fmake_temp_name, Smake_temp_name, 1, 1, 0, | |
8c1a1077 PJ |
711 | doc: /* Generate temporary file name (string) starting with PREFIX (a string). |
712 | The Emacs process number forms part of the result, | |
713 | so there is no danger of generating a name being used by another process. | |
714 | ||
715 | In addition, this function makes an attempt to choose a name | |
716 | which has no existing file. To make this work, | |
717 | PREFIX should be an absolute file name. | |
718 | ||
719 | There is a race condition between calling `make-temp-name' and creating the | |
720 | file which opens all kinds of security holes. For that reason, you should | |
f9e6f049 RS |
721 | probably use `make-temp-file' instead, except in three circumstances: |
722 | ||
723 | * If you are creating the file in the user's home directory. | |
724 | * If you are creating a directory rather than an ordinary file. | |
725 | * If you are taking special precautions as `make-temp-file' does. */) | |
5842a27b | 726 | (Lisp_Object prefix) |
cb613bb8 GM |
727 | { |
728 | return make_temp_name (prefix, 0); | |
729 | } | |
730 | ||
731 | ||
570d7624 | 732 | \f |
a7ca3326 | 733 | DEFUN ("expand-file-name", Fexpand_file_name, Sexpand_file_name, 1, 2, 0, |
8c1a1077 PJ |
734 | doc: /* Convert filename NAME to absolute, and canonicalize it. |
735 | Second arg DEFAULT-DIRECTORY is directory to start with if NAME is relative | |
78379264 | 736 | \(does not start with slash or tilde); if DEFAULT-DIRECTORY is nil or missing, |
a4e03fe5 | 737 | the current buffer's value of `default-directory' is used. |
1b2a627f EZ |
738 | NAME should be a string that is a valid file name for the underlying |
739 | filesystem. | |
8c1a1077 PJ |
740 | File name components that are `.' are removed, and |
741 | so are file name components followed by `..', along with the `..' itself; | |
742 | note that these simplifications are done without checking the resulting | |
743 | file names in the file system. | |
15579471 EZ |
744 | Multiple consecutive slashes are collapsed into a single slash, |
745 | except at the beginning of the file name when they are significant (e.g., | |
746 | UNC file names on MS-Windows.) | |
8c1a1077 PJ |
747 | An initial `~/' expands to your home directory. |
748 | An initial `~USER/' expands to USER's home directory. | |
07114296 CY |
749 | See also the function `substitute-in-file-name'. |
750 | ||
751 | For technical reasons, this function can return correct but | |
752 | non-intuitive results for the root directory; for instance, | |
753 | \(expand-file-name ".." "/") returns "/..". For this reason, use | |
15579471 | 754 | \(directory-file-name (file-name-directory dirname)) to traverse a |
07114296 | 755 | filesystem tree, not (expand-file-name ".." dirname). */) |
5842a27b | 756 | (Lisp_Object name, Lisp_Object default_directory) |
570d7624 | 757 | { |
5b5a2ea1 SM |
758 | /* These point to SDATA and need to be careful with string-relocation |
759 | during GC (via DECODE_FILE). */ | |
2893f146 PE |
760 | char *nm; |
761 | const char *newdir; | |
5b5a2ea1 | 762 | /* This should only point to alloca'd data. */ |
5976c3fe | 763 | char *target; |
199607e4 | 764 | |
93f4cf88 | 765 | ptrdiff_t tlen; |
570d7624 | 766 | struct passwd *pw; |
5e570b75 | 767 | #ifdef DOS_NT |
199607e4 | 768 | int drive = 0; |
9a1dc3be | 769 | int collapse_newdir = 1; |
f0f95d31 | 770 | int is_escaped = 0; |
5e570b75 | 771 | #endif /* DOS_NT */ |
93f4cf88 | 772 | ptrdiff_t length; |
2375c96a | 773 | Lisp_Object handler, result, handled_name; |
2b046a72 | 774 | int multibyte; |
9c06a1f3 | 775 | Lisp_Object hdir; |
199607e4 | 776 | |
b7826503 | 777 | CHECK_STRING (name); |
570d7624 | 778 | |
0bf2eed2 RS |
779 | /* If the file name has special constructs in it, |
780 | call the corresponding file handler. */ | |
49307295 | 781 | handler = Ffind_file_name_handler (name, Qexpand_file_name); |
0bf2eed2 | 782 | if (!NILP (handler)) |
2375c96a CY |
783 | { |
784 | handled_name = call3 (handler, Qexpand_file_name, | |
785 | name, default_directory); | |
786 | if (STRINGP (handled_name)) | |
787 | return handled_name; | |
788 | error ("Invalid handler in `file-name-handler-alist'"); | |
789 | } | |
790 | ||
58fc9587 | 791 | |
3b7f6e60 EN |
792 | /* Use the buffer's default-directory if DEFAULT_DIRECTORY is omitted. */ |
793 | if (NILP (default_directory)) | |
4b4deea2 | 794 | default_directory = BVAR (current_buffer, directory); |
82330e7f | 795 | if (! STRINGP (default_directory)) |
dd693537 EZ |
796 | { |
797 | #ifdef DOS_NT | |
798 | /* "/" is not considered a root directory on DOS_NT, so using "/" | |
799 | here causes an infinite recursion in, e.g., the following: | |
800 | ||
801 | (let (default-directory) | |
802 | (expand-file-name "a")) | |
803 | ||
804 | To avoid this, we set default_directory to the root of the | |
805 | current drive. */ | |
dd693537 EZ |
806 | default_directory = build_string (emacs_root_dir ()); |
807 | #else | |
808 | default_directory = build_string ("/"); | |
809 | #endif | |
810 | } | |
58fc9587 | 811 | |
3b7f6e60 | 812 | if (!NILP (default_directory)) |
273e0829 | 813 | { |
3b7f6e60 | 814 | handler = Ffind_file_name_handler (default_directory, Qexpand_file_name); |
273e0829 | 815 | if (!NILP (handler)) |
2375c96a CY |
816 | { |
817 | handled_name = call3 (handler, Qexpand_file_name, | |
818 | name, default_directory); | |
819 | if (STRINGP (handled_name)) | |
820 | return handled_name; | |
821 | error ("Invalid handler in `file-name-handler-alist'"); | |
822 | } | |
273e0829 | 823 | } |
0bf2eed2 | 824 | |
5b5a2ea1 | 825 | { |
5976c3fe | 826 | char *o = SSDATA (default_directory); |
5b5a2ea1 SM |
827 | |
828 | /* Make sure DEFAULT_DIRECTORY is properly expanded. | |
829 | It would be better to do this down below where we actually use | |
830 | default_directory. Unfortunately, calling Fexpand_file_name recursively | |
831 | could invoke GC, and the strings might be relocated. This would | |
832 | be annoying because we have pointers into strings lying around | |
833 | that would need adjusting, and people would add new pointers to | |
834 | the code and forget to adjust them, resulting in intermittent bugs. | |
835 | Putting this call here avoids all that crud. | |
836 | ||
837 | The EQ test avoids infinite recursion. */ | |
838 | if (! NILP (default_directory) && !EQ (default_directory, name) | |
839 | /* Save time in some common cases - as long as default_directory | |
840 | is not relative, it can be canonicalized with name below (if it | |
841 | is needed at all) without requiring it to be expanded now. */ | |
01937013 | 842 | #ifdef DOS_NT |
5b5a2ea1 SM |
843 | /* Detect MSDOS file names with drive specifiers. */ |
844 | && ! (IS_DRIVE (o[0]) && IS_DEVICE_SEP (o[1]) | |
845 | && IS_DIRECTORY_SEP (o[2])) | |
199607e4 | 846 | #ifdef WINDOWSNT |
5b5a2ea1 SM |
847 | /* Detect Windows file names in UNC format. */ |
848 | && ! (IS_DIRECTORY_SEP (o[0]) && IS_DIRECTORY_SEP (o[1])) | |
01937013 | 849 | #endif |
199607e4 RS |
850 | #else /* not DOS_NT */ |
851 | /* Detect Unix absolute file names (/... alone is not absolute on | |
852 | DOS or Windows). */ | |
5b5a2ea1 | 853 | && ! (IS_DIRECTORY_SEP (o[0])) |
199607e4 | 854 | #endif /* not DOS_NT */ |
5b5a2ea1 SM |
855 | ) |
856 | { | |
857 | struct gcpro gcpro1; | |
f14b1c68 | 858 | |
5b5a2ea1 SM |
859 | GCPRO1 (name); |
860 | default_directory = Fexpand_file_name (default_directory, Qnil); | |
861 | UNGCPRO; | |
862 | } | |
863 | } | |
4c3c22f3 | 864 | name = FILE_SYSTEM_CASE (name); |
2b046a72 | 865 | multibyte = STRING_MULTIBYTE (name); |
6d060996 KH |
866 | if (multibyte != STRING_MULTIBYTE (default_directory)) |
867 | { | |
868 | if (multibyte) | |
869 | default_directory = string_to_multibyte (default_directory); | |
870 | else | |
871 | { | |
872 | name = string_to_multibyte (name); | |
873 | multibyte = 1; | |
874 | } | |
875 | } | |
876 | ||
e8d32c7e | 877 | /* Make a local copy of nm[] to protect it from GC in DECODE_FILE below. */ |
38182d90 | 878 | nm = alloca (SBYTES (name) + 1); |
5976c3fe | 879 | memcpy (nm, SSDATA (name), SBYTES (name) + 1); |
199607e4 | 880 | |
565f0b98 | 881 | #ifdef DOS_NT |
f0f95d31 RS |
882 | /* Note if special escape prefix is present, but remove for now. */ |
883 | if (nm[0] == '/' && nm[1] == ':') | |
884 | { | |
885 | is_escaped = 1; | |
886 | nm += 2; | |
887 | } | |
888 | ||
199607e4 | 889 | /* Find and remove drive specifier if present; this makes nm absolute |
f0f95d31 RS |
890 | even if the rest of the name appears to be relative. Only look for |
891 | drive specifier at the beginning. */ | |
892 | if (IS_DRIVE (nm[0]) && IS_DEVICE_SEP (nm[1])) | |
893 | { | |
5976c3fe | 894 | drive = (unsigned char) nm[0]; |
f0f95d31 RS |
895 | nm += 2; |
896 | } | |
bb1ff1f4 GV |
897 | |
898 | #ifdef WINDOWSNT | |
899 | /* If we see "c://somedir", we want to strip the first slash after the | |
900 | colon when stripping the drive letter. Otherwise, this expands to | |
901 | "//somedir". */ | |
902 | if (drive && IS_DIRECTORY_SEP (nm[0]) && IS_DIRECTORY_SEP (nm[1])) | |
903 | nm++; | |
4c3c22f3 | 904 | |
e8d32c7e | 905 | /* Discard any previous drive specifier if nm is now in UNC format. */ |
199607e4 RS |
906 | if (IS_DIRECTORY_SEP (nm[0]) && IS_DIRECTORY_SEP (nm[1])) |
907 | { | |
908 | drive = 0; | |
909 | } | |
5b5a2ea1 SM |
910 | #endif /* WINDOWSNT */ |
911 | #endif /* DOS_NT */ | |
199607e4 | 912 | |
214378ec GM |
913 | /* If nm is absolute, look for `/./' or `/../' or `//''sequences; if |
914 | none are found, we can probably return right away. We will avoid | |
915 | allocating a new string if name is already fully expanded. */ | |
570d7624 | 916 | if ( |
5e570b75 | 917 | IS_DIRECTORY_SEP (nm[0]) |
199607e4 | 918 | #ifdef MSDOS |
f0f95d31 | 919 | && drive && !is_escaped |
199607e4 RS |
920 | #endif |
921 | #ifdef WINDOWSNT | |
f0f95d31 | 922 | && (drive || IS_DIRECTORY_SEP (nm[1])) && !is_escaped |
199607e4 | 923 | #endif |
570d7624 JB |
924 | ) |
925 | { | |
f14b1c68 JB |
926 | /* If it turns out that the filename we want to return is just a |
927 | suffix of FILENAME, we don't need to go through and edit | |
928 | things; we just need to construct a new string using data | |
929 | starting at the middle of FILENAME. If we set lose to a | |
930 | non-zero value, that means we've discovered that we can't do | |
931 | that cool trick. */ | |
932 | int lose = 0; | |
5976c3fe | 933 | char *p = nm; |
f14b1c68 | 934 | |
570d7624 JB |
935 | while (*p) |
936 | { | |
199607e4 | 937 | /* Since we know the name is absolute, we can assume that each |
c77d647e JB |
938 | element starts with a "/". */ |
939 | ||
c77d647e | 940 | /* "." and ".." are hairy. */ |
5e570b75 | 941 | if (IS_DIRECTORY_SEP (p[0]) |
c77d647e | 942 | && p[1] == '.' |
5e570b75 | 943 | && (IS_DIRECTORY_SEP (p[2]) |
c77d647e | 944 | || p[2] == 0 |
5e570b75 | 945 | || (p[2] == '.' && (IS_DIRECTORY_SEP (p[3]) |
c77d647e | 946 | || p[3] == 0)))) |
570d7624 | 947 | lose = 1; |
214378ec GM |
948 | /* We want to replace multiple `/' in a row with a single |
949 | slash. */ | |
950 | else if (p > nm | |
951 | && IS_DIRECTORY_SEP (p[0]) | |
952 | && IS_DIRECTORY_SEP (p[1])) | |
953 | lose = 1; | |
570d7624 JB |
954 | p++; |
955 | } | |
956 | if (!lose) | |
957 | { | |
199607e4 | 958 | #ifdef DOS_NT |
087fc47a JB |
959 | /* Make sure directories are all separated with /, but |
960 | avoid allocation of a new string when not required. */ | |
961 | dostounix_filename (nm); | |
199607e4 RS |
962 | #ifdef WINDOWSNT |
963 | if (IS_DIRECTORY_SEP (nm[1])) | |
964 | { | |
42a5b22f | 965 | if (strcmp (nm, SSDATA (name)) != 0) |
2b046a72 | 966 | name = make_specified_string (nm, -1, strlen (nm), multibyte); |
199607e4 RS |
967 | } |
968 | else | |
969 | #endif | |
e8d32c7e | 970 | /* Drive must be set, so this is okay. */ |
5976c3fe | 971 | if (strcmp (nm - 2, SSDATA (name)) != 0) |
199607e4 | 972 | { |
3f817c73 KH |
973 | char temp[] = " :"; |
974 | ||
2b046a72 | 975 | name = make_specified_string (nm, -1, p - nm, multibyte); |
3f817c73 KH |
976 | temp[0] = DRIVE_LETTER (drive); |
977 | name = concat2 (build_string (temp), name); | |
199607e4 RS |
978 | } |
979 | return name; | |
980 | #else /* not DOS_NT */ | |
42a5b22f | 981 | if (strcmp (nm, SSDATA (name)) == 0) |
570d7624 | 982 | return name; |
2b046a72 | 983 | return make_specified_string (nm, -1, strlen (nm), multibyte); |
5e570b75 | 984 | #endif /* not DOS_NT */ |
570d7624 JB |
985 | } |
986 | } | |
987 | ||
199607e4 RS |
988 | /* At this point, nm might or might not be an absolute file name. We |
989 | need to expand ~ or ~user if present, otherwise prefix nm with | |
990 | default_directory if nm is not absolute, and finally collapse /./ | |
991 | and /foo/../ sequences. | |
992 | ||
993 | We set newdir to be the appropriate prefix if one is needed: | |
994 | - the relevant user directory if nm starts with ~ or ~user | |
995 | - the specified drive's working dir (DOS/NT only) if nm does not | |
996 | start with / | |
997 | - the value of default_directory. | |
998 | ||
999 | Note that these prefixes are not guaranteed to be absolute (except | |
1000 | for the working dir of a drive). Therefore, to ensure we always | |
1001 | return an absolute name, if the final prefix is not absolute we | |
1002 | append it to the current working directory. */ | |
570d7624 JB |
1003 | |
1004 | newdir = 0; | |
1005 | ||
1006 | if (nm[0] == '~') /* prefix ~ */ | |
c77d647e | 1007 | { |
5e570b75 | 1008 | if (IS_DIRECTORY_SEP (nm[1]) |
c77d647e JB |
1009 | || nm[1] == 0) /* ~ by itself */ |
1010 | { | |
6d557778 EZ |
1011 | Lisp_Object tem; |
1012 | ||
5976c3fe PE |
1013 | if (!(newdir = egetenv ("HOME"))) |
1014 | newdir = ""; | |
199607e4 | 1015 | nm++; |
e8d32c7e | 1016 | /* `egetenv' may return a unibyte string, which will bite us since |
6d557778 | 1017 | we expect the directory to be multibyte. */ |
9c06a1f3 EZ |
1018 | tem = build_string (newdir); |
1019 | if (!STRING_MULTIBYTE (tem)) | |
1020 | { | |
1021 | hdir = DECODE_FILE (tem); | |
5976c3fe | 1022 | newdir = SSDATA (hdir); |
9c06a1f3 | 1023 | } |
5e570b75 | 1024 | #ifdef DOS_NT |
9a1dc3be | 1025 | collapse_newdir = 0; |
4c3c22f3 | 1026 | #endif |
c77d647e JB |
1027 | } |
1028 | else /* ~user/filename */ | |
1029 | { | |
5976c3fe | 1030 | char *o, *p; |
7c2fb837 | 1031 | for (p = nm; *p && (!IS_DIRECTORY_SEP (*p)); p++); |
5b5a2ea1 | 1032 | o = alloca (p - nm + 1); |
72af86bd | 1033 | memcpy (o, nm, p - nm); |
c77d647e JB |
1034 | o [p - nm] = 0; |
1035 | ||
67c08d6c | 1036 | BLOCK_INPUT; |
c77d647e | 1037 | pw = (struct passwd *) getpwnam (o + 1); |
67c08d6c | 1038 | UNBLOCK_INPUT; |
c77d647e JB |
1039 | if (pw) |
1040 | { | |
5976c3fe | 1041 | newdir = pw->pw_dir; |
c77d647e | 1042 | nm = p; |
199607e4 | 1043 | #ifdef DOS_NT |
9a1dc3be | 1044 | collapse_newdir = 0; |
199607e4 | 1045 | #endif |
c77d647e | 1046 | } |
e5d77022 | 1047 | |
c77d647e JB |
1048 | /* If we don't find a user of that name, leave the name |
1049 | unchanged; don't move nm forward to p. */ | |
1050 | } | |
1051 | } | |
570d7624 | 1052 | |
5e570b75 | 1053 | #ifdef DOS_NT |
199607e4 RS |
1054 | /* On DOS and Windows, nm is absolute if a drive name was specified; |
1055 | use the drive's current directory as the prefix if needed. */ | |
1056 | if (!newdir && drive) | |
1057 | { | |
e8d32c7e | 1058 | /* Get default directory if needed to make nm absolute. */ |
2893f146 | 1059 | char *adir = NULL; |
199607e4 RS |
1060 | if (!IS_DIRECTORY_SEP (nm[0])) |
1061 | { | |
2893f146 PE |
1062 | adir = alloca (MAXPATHLEN + 1); |
1063 | if (!getdefdir (toupper (drive) - 'A' + 1, adir)) | |
1064 | adir = NULL; | |
199607e4 | 1065 | } |
2893f146 | 1066 | if (!adir) |
199607e4 | 1067 | { |
e8d32c7e | 1068 | /* Either nm starts with /, or drive isn't mounted. */ |
2893f146 PE |
1069 | adir = alloca (4); |
1070 | adir[0] = DRIVE_LETTER (drive); | |
1071 | adir[1] = ':'; | |
1072 | adir[2] = '/'; | |
1073 | adir[3] = 0; | |
199607e4 | 1074 | } |
2893f146 | 1075 | newdir = adir; |
199607e4 | 1076 | } |
5e570b75 | 1077 | #endif /* DOS_NT */ |
199607e4 RS |
1078 | |
1079 | /* Finally, if no prefix has been specified and nm is not absolute, | |
e8d32c7e | 1080 | then it must be expanded relative to default_directory. */ |
199607e4 | 1081 | |
34097368 | 1082 | if (1 |
199607e4 | 1083 | #ifndef DOS_NT |
e8d32c7e | 1084 | /* /... alone is not absolute on DOS and Windows. */ |
34097368 | 1085 | && !IS_DIRECTORY_SEP (nm[0]) |
199607e4 RS |
1086 | #endif |
1087 | #ifdef WINDOWSNT | |
34097368 | 1088 | && !(IS_DIRECTORY_SEP (nm[0]) && IS_DIRECTORY_SEP (nm[1])) |
199607e4 | 1089 | #endif |
570d7624 JB |
1090 | && !newdir) |
1091 | { | |
5976c3fe | 1092 | newdir = SSDATA (default_directory); |
f0f95d31 RS |
1093 | #ifdef DOS_NT |
1094 | /* Note if special escape prefix is present, but remove for now. */ | |
1095 | if (newdir[0] == '/' && newdir[1] == ':') | |
1096 | { | |
1097 | is_escaped = 1; | |
1098 | newdir += 2; | |
1099 | } | |
1100 | #endif | |
570d7624 JB |
1101 | } |
1102 | ||
5e570b75 | 1103 | #ifdef DOS_NT |
199607e4 RS |
1104 | if (newdir) |
1105 | { | |
e8d32c7e | 1106 | /* First ensure newdir is an absolute name. */ |
199607e4 RS |
1107 | if ( |
1108 | /* Detect MSDOS file names with drive specifiers. */ | |
1109 | ! (IS_DRIVE (newdir[0]) | |
1110 | && IS_DEVICE_SEP (newdir[1]) && IS_DIRECTORY_SEP (newdir[2])) | |
1111 | #ifdef WINDOWSNT | |
1112 | /* Detect Windows file names in UNC format. */ | |
1113 | && ! (IS_DIRECTORY_SEP (newdir[0]) && IS_DIRECTORY_SEP (newdir[1])) | |
1114 | #endif | |
1115 | ) | |
1116 | { | |
1117 | /* Effectively, let newdir be (expand-file-name newdir cwd). | |
1118 | Because of the admonition against calling expand-file-name | |
1119 | when we have pointers into lisp strings, we accomplish this | |
1120 | indirectly by prepending newdir to nm if necessary, and using | |
e8d32c7e | 1121 | cwd (or the wd of newdir's drive) as the new newdir. */ |
2893f146 | 1122 | char *adir; |
c70a4df6 | 1123 | if (IS_DRIVE (newdir[0]) && IS_DEVICE_SEP (newdir[1])) |
199607e4 | 1124 | { |
5976c3fe | 1125 | drive = (unsigned char) newdir[0]; |
199607e4 RS |
1126 | newdir += 2; |
1127 | } | |
1128 | if (!IS_DIRECTORY_SEP (nm[0])) | |
1129 | { | |
c293e30c DA |
1130 | ptrdiff_t newlen = strlen (newdir); |
1131 | char *tmp = alloca (newlen + strlen (nm) + 2); | |
1132 | file_name_as_directory (tmp, newdir, newlen); | |
199607e4 RS |
1133 | strcat (tmp, nm); |
1134 | nm = tmp; | |
1135 | } | |
2893f146 | 1136 | adir = alloca (MAXPATHLEN + 1); |
199607e4 RS |
1137 | if (drive) |
1138 | { | |
2893f146 | 1139 | if (!getdefdir (toupper (drive) - 'A' + 1, adir)) |
199607e4 RS |
1140 | newdir = "/"; |
1141 | } | |
1142 | else | |
2893f146 PE |
1143 | getwd (adir); |
1144 | newdir = adir; | |
199607e4 RS |
1145 | } |
1146 | ||
e8d32c7e | 1147 | /* Strip off drive name from prefix, if present. */ |
c70a4df6 | 1148 | if (IS_DRIVE (newdir[0]) && IS_DEVICE_SEP (newdir[1])) |
199607e4 RS |
1149 | { |
1150 | drive = newdir[0]; | |
1151 | newdir += 2; | |
1152 | } | |
1153 | ||
1154 | /* Keep only a prefix from newdir if nm starts with slash | |
82330e7f | 1155 | (//server/share for UNC, nothing otherwise). */ |
9a1dc3be | 1156 | if (IS_DIRECTORY_SEP (nm[0]) && collapse_newdir) |
199607e4 RS |
1157 | { |
1158 | #ifdef WINDOWSNT | |
1159 | if (IS_DIRECTORY_SEP (newdir[0]) && IS_DIRECTORY_SEP (newdir[1])) | |
1160 | { | |
2893f146 PE |
1161 | char *adir = strcpy (alloca (strlen (newdir) + 1), newdir); |
1162 | char *p = adir + 2; | |
199607e4 RS |
1163 | while (*p && !IS_DIRECTORY_SEP (*p)) p++; |
1164 | p++; | |
1165 | while (*p && !IS_DIRECTORY_SEP (*p)) p++; | |
1166 | *p = 0; | |
2893f146 | 1167 | newdir = adir; |
199607e4 RS |
1168 | } |
1169 | else | |
1170 | #endif | |
1171 | newdir = ""; | |
1172 | } | |
1173 | } | |
5e570b75 | 1174 | #endif /* DOS_NT */ |
199607e4 RS |
1175 | |
1176 | if (newdir) | |
bfb61299 | 1177 | { |
57676091 | 1178 | /* Get rid of any slash at the end of newdir, unless newdir is |
f0f95d31 | 1179 | just / or // (an incomplete UNC name). */ |
199607e4 | 1180 | length = strlen (newdir); |
c293e30c | 1181 | tlen = length + 1; |
f0f95d31 | 1182 | if (length > 1 && IS_DIRECTORY_SEP (newdir[length - 1]) |
57676091 RS |
1183 | #ifdef WINDOWSNT |
1184 | && !(length == 2 && IS_DIRECTORY_SEP (newdir[0])) | |
1185 | #endif | |
1186 | ) | |
bfb61299 | 1187 | { |
38182d90 | 1188 | char *temp = alloca (length); |
72af86bd | 1189 | memcpy (temp, newdir, length - 1); |
bfb61299 | 1190 | temp[length - 1] = 0; |
c293e30c | 1191 | length--; |
bfb61299 JB |
1192 | newdir = temp; |
1193 | } | |
bfb61299 JB |
1194 | } |
1195 | else | |
c293e30c DA |
1196 | { |
1197 | length = 0; | |
1198 | tlen = 0; | |
1199 | } | |
570d7624 | 1200 | |
e8d32c7e | 1201 | /* Now concatenate the directory and name to new space in the stack frame. */ |
bfb61299 | 1202 | tlen += strlen (nm) + 1; |
5e570b75 | 1203 | #ifdef DOS_NT |
f0f95d31 RS |
1204 | /* Reserve space for drive specifier and escape prefix, since either |
1205 | or both may need to be inserted. (The Microsoft x86 compiler | |
5e570b75 | 1206 | produces incorrect code if the following two lines are combined.) */ |
38182d90 | 1207 | target = alloca (tlen + 4); |
f0f95d31 | 1208 | target += 4; |
5e570b75 | 1209 | #else /* not DOS_NT */ |
38182d90 | 1210 | target = alloca (tlen); |
5e570b75 | 1211 | #endif /* not DOS_NT */ |
570d7624 JB |
1212 | *target = 0; |
1213 | ||
1214 | if (newdir) | |
1215 | { | |
5e570b75 | 1216 | if (nm[0] == 0 || IS_DIRECTORY_SEP (nm[0])) |
f5321b5c | 1217 | { |
3ea2d8b2 | 1218 | #ifdef DOS_NT |
f5321b5c RS |
1219 | /* If newdir is effectively "C:/", then the drive letter will have |
1220 | been stripped and newdir will be "/". Concatenating with an | |
1221 | absolute directory in nm produces "//", which will then be | |
1222 | incorrectly treated as a network share. Ignore newdir in | |
1223 | this case (keeping the drive letter). */ | |
efdc16c9 | 1224 | if (!(drive && nm[0] && IS_DIRECTORY_SEP (newdir[0]) |
f5321b5c RS |
1225 | && newdir[1] == '\0')) |
1226 | #endif | |
1227 | strcpy (target, newdir); | |
1228 | } | |
570d7624 | 1229 | else |
c293e30c | 1230 | file_name_as_directory (target, newdir, length); |
570d7624 JB |
1231 | } |
1232 | ||
1233 | strcat (target, nm); | |
199607e4 | 1234 | |
214378ec GM |
1235 | /* Now canonicalize by removing `//', `/.' and `/foo/..' if they |
1236 | appear. */ | |
5b5a2ea1 | 1237 | { |
5976c3fe PE |
1238 | char *p = target; |
1239 | char *o = target; | |
570d7624 | 1240 | |
5b5a2ea1 SM |
1241 | while (*p) |
1242 | { | |
5b5a2ea1 SM |
1243 | if (!IS_DIRECTORY_SEP (*p)) |
1244 | { | |
1245 | *o++ = *p++; | |
1246 | } | |
1247 | else if (p[1] == '.' | |
1248 | && (IS_DIRECTORY_SEP (p[2]) | |
1249 | || p[2] == 0)) | |
1250 | { | |
1251 | /* If "/." is the entire filename, keep the "/". Otherwise, | |
1252 | just delete the whole "/.". */ | |
1253 | if (o == target && p[2] == '\0') | |
1254 | *o++ = *p; | |
1255 | p += 2; | |
1256 | } | |
1257 | else if (p[1] == '.' && p[2] == '.' | |
1258 | /* `/../' is the "superroot" on certain file systems. | |
1259 | Turned off on DOS_NT systems because they have no | |
1260 | "superroot" and because this causes us to produce | |
1261 | file names like "d:/../foo" which fail file-related | |
1262 | functions of the underlying OS. (To reproduce, try a | |
1263 | long series of "../../" in default_directory, longer | |
1264 | than the number of levels from the root.) */ | |
aa4060b9 | 1265 | #ifndef DOS_NT |
5b5a2ea1 | 1266 | && o != target |
aa4060b9 | 1267 | #endif |
5b5a2ea1 SM |
1268 | && (IS_DIRECTORY_SEP (p[3]) || p[3] == 0)) |
1269 | { | |
972ed246 | 1270 | #ifdef WINDOWSNT |
5976c3fe | 1271 | char *prev_o = o; |
972ed246 | 1272 | #endif |
5b5a2ea1 SM |
1273 | while (o != target && (--o) && !IS_DIRECTORY_SEP (*o)) |
1274 | ; | |
972ed246 JR |
1275 | #ifdef WINDOWSNT |
1276 | /* Don't go below server level in UNC filenames. */ | |
1277 | if (o == target + 1 && IS_DIRECTORY_SEP (*o) | |
1278 | && IS_DIRECTORY_SEP (*target)) | |
1279 | o = prev_o; | |
1280 | else | |
1281 | #endif | |
5b5a2ea1 SM |
1282 | /* Keep initial / only if this is the whole name. */ |
1283 | if (o == target && IS_ANY_SEP (*o) && p[3] == 0) | |
1284 | ++o; | |
1285 | p += 3; | |
1286 | } | |
1287 | else if (p > target && IS_DIRECTORY_SEP (p[1])) | |
1288 | /* Collapse multiple `/' in a row. */ | |
1289 | p++; | |
1290 | else | |
1291 | { | |
1292 | *o++ = *p++; | |
1293 | } | |
5b5a2ea1 | 1294 | } |
570d7624 | 1295 | |
5e570b75 | 1296 | #ifdef DOS_NT |
e8d32c7e | 1297 | /* At last, set drive name. */ |
5e570b75 | 1298 | #ifdef WINDOWSNT |
5b5a2ea1 SM |
1299 | /* Except for network file name. */ |
1300 | if (!(IS_DIRECTORY_SEP (target[0]) && IS_DIRECTORY_SEP (target[1]))) | |
5e570b75 | 1301 | #endif /* WINDOWSNT */ |
5b5a2ea1 SM |
1302 | { |
1303 | if (!drive) abort (); | |
1304 | target -= 2; | |
1305 | target[0] = DRIVE_LETTER (drive); | |
1306 | target[1] = ':'; | |
1307 | } | |
1308 | /* Reinsert the escape prefix if required. */ | |
1309 | if (is_escaped) | |
1310 | { | |
1311 | target -= 2; | |
1312 | target[0] = '/'; | |
1313 | target[1] = ':'; | |
1314 | } | |
087fc47a | 1315 | dostounix_filename (target); |
5e570b75 | 1316 | #endif /* DOS_NT */ |
4c3c22f3 | 1317 | |
5b5a2ea1 SM |
1318 | result = make_specified_string (target, -1, o - target, multibyte); |
1319 | } | |
beb402de KG |
1320 | |
1321 | /* Again look to see if the file name has special constructs in it | |
1322 | and perhaps call the corresponding file handler. This is needed | |
1323 | for filenames such as "/foo/../user@host:/bar/../baz". Expanding | |
1324 | the ".." component gives us "/user@host:/bar/../baz" which needs | |
e8d32c7e | 1325 | to be expanded again. */ |
beb402de KG |
1326 | handler = Ffind_file_name_handler (result, Qexpand_file_name); |
1327 | if (!NILP (handler)) | |
2375c96a CY |
1328 | { |
1329 | handled_name = call3 (handler, Qexpand_file_name, | |
1330 | result, default_directory); | |
1331 | if (STRINGP (handled_name)) | |
1332 | return handled_name; | |
1333 | error ("Invalid handler in `file-name-handler-alist'"); | |
1334 | } | |
beb402de KG |
1335 | |
1336 | return result; | |
570d7624 | 1337 | } |
5e570b75 | 1338 | |
4887597a EZ |
1339 | #if 0 |
1340 | /* PLEASE DO NOT DELETE THIS COMMENTED-OUT VERSION! | |
1341 | This is the old version of expand-file-name, before it was thoroughly | |
1342 | rewritten for Emacs 10.31. We leave this version here commented-out, | |
1343 | because the code is very complex and likely to have subtle bugs. If | |
1344 | bugs _are_ found, it might be of interest to look at the old code and | |
1345 | see what did it do in the relevant situation. | |
1346 | ||
30f50381 GM |
1347 | Don't remove this code: it's true that it will be accessible |
1348 | from the repository, but a few years from deletion, people will | |
1349 | forget it is there. */ | |
4887597a EZ |
1350 | |
1351 | /* Changed this DEFUN to a DEAFUN, so as not to confuse `make-docfile'. */ | |
1352 | DEAFUN ("expand-file-name", Fexpand_file_name, Sexpand_file_name, 1, 2, 0, | |
1353 | "Convert FILENAME to absolute, and canonicalize it.\n\ | |
1354 | Second arg DEFAULT is directory to start with if FILENAME is relative\n\ | |
c70a4df6 | 1355 | \(does not start with slash); if DEFAULT is nil or missing,\n\ |
4887597a EZ |
1356 | the current buffer's value of default-directory is used.\n\ |
1357 | Filenames containing `.' or `..' as components are simplified;\n\ | |
1358 | initial `~/' expands to your home directory.\n\ | |
1359 | See also the function `substitute-in-file-name'.") | |
1360 | (name, defalt) | |
1361 | Lisp_Object name, defalt; | |
1362 | { | |
1363 | unsigned char *nm; | |
1364 | ||
1365 | register unsigned char *newdir, *p, *o; | |
93f4cf88 | 1366 | ptrdiff_t tlen; |
4887597a EZ |
1367 | unsigned char *target; |
1368 | struct passwd *pw; | |
1369 | int lose; | |
4887597a | 1370 | |
b7826503 | 1371 | CHECK_STRING (name); |
d5db4077 | 1372 | nm = SDATA (name); |
4887597a EZ |
1373 | |
1374 | /* If nm is absolute, flush ...// and detect /./ and /../. | |
1375 | If no /./ or /../ we can return right away. */ | |
7c2fb837 | 1376 | if (nm[0] == '/') |
4887597a EZ |
1377 | { |
1378 | p = nm; | |
1379 | lose = 0; | |
1380 | while (*p) | |
1381 | { | |
1382 | if (p[0] == '/' && p[1] == '/' | |
4887597a EZ |
1383 | ) |
1384 | nm = p + 1; | |
1385 | if (p[0] == '/' && p[1] == '~') | |
1386 | nm = p + 1, lose = 1; | |
1387 | if (p[0] == '/' && p[1] == '.' | |
1388 | && (p[2] == '/' || p[2] == 0 | |
1389 | || (p[2] == '.' && (p[3] == '/' || p[3] == 0)))) | |
1390 | lose = 1; | |
4887597a EZ |
1391 | p++; |
1392 | } | |
1393 | if (!lose) | |
1394 | { | |
d5db4077 | 1395 | if (nm == SDATA (name)) |
4887597a EZ |
1396 | return name; |
1397 | return build_string (nm); | |
1398 | } | |
1399 | } | |
1400 | ||
e8d32c7e | 1401 | /* Now determine directory to start with and put it in NEWDIR. */ |
4887597a EZ |
1402 | |
1403 | newdir = 0; | |
1404 | ||
1405 | if (nm[0] == '~') /* prefix ~ */ | |
7c2fb837 | 1406 | if (nm[1] == '/' || nm[1] == 0)/* ~/filename */ |
4887597a EZ |
1407 | { |
1408 | if (!(newdir = (unsigned char *) egetenv ("HOME"))) | |
1409 | newdir = (unsigned char *) ""; | |
1410 | nm++; | |
4887597a EZ |
1411 | } |
1412 | else /* ~user/filename */ | |
1413 | { | |
e8d32c7e | 1414 | /* Get past ~ to user. */ |
4887597a | 1415 | unsigned char *user = nm + 1; |
e8d32c7e | 1416 | /* Find end of name. */ |
8966b757 | 1417 | unsigned char *ptr = (unsigned char *) strchr (user, '/'); |
93f4cf88 | 1418 | ptrdiff_t len = ptr ? ptr - user : strlen (user); |
e8d32c7e | 1419 | /* Copy the user name into temp storage. */ |
38182d90 | 1420 | o = alloca (len + 1); |
72af86bd | 1421 | memcpy (o, user, len); |
4887597a EZ |
1422 | o[len] = 0; |
1423 | ||
e8d32c7e | 1424 | /* Look up the user name. */ |
67c08d6c | 1425 | BLOCK_INPUT; |
4887597a | 1426 | pw = (struct passwd *) getpwnam (o + 1); |
67c08d6c | 1427 | UNBLOCK_INPUT; |
4887597a EZ |
1428 | if (!pw) |
1429 | error ("\"%s\" isn't a registered user", o + 1); | |
1430 | ||
1431 | newdir = (unsigned char *) pw->pw_dir; | |
1432 | ||
1433 | /* Discard the user name from NM. */ | |
1434 | nm += len; | |
1435 | } | |
1436 | ||
7c2fb837 | 1437 | if (nm[0] != '/' && !newdir) |
4887597a EZ |
1438 | { |
1439 | if (NILP (defalt)) | |
1440 | defalt = current_buffer->directory; | |
b7826503 | 1441 | CHECK_STRING (defalt); |
d5db4077 | 1442 | newdir = SDATA (defalt); |
4887597a EZ |
1443 | } |
1444 | ||
e8d32c7e | 1445 | /* Now concatenate the directory and name to new space in the stack frame. */ |
4887597a EZ |
1446 | |
1447 | tlen = (newdir ? strlen (newdir) + 1 : 0) + strlen (nm) + 1; | |
38182d90 | 1448 | target = alloca (tlen); |
4887597a EZ |
1449 | *target = 0; |
1450 | ||
1451 | if (newdir) | |
1452 | { | |
4887597a EZ |
1453 | if (nm[0] == 0 || nm[0] == '/') |
1454 | strcpy (target, newdir); | |
1455 | else | |
4887597a EZ |
1456 | file_name_as_directory (target, newdir); |
1457 | } | |
1458 | ||
1459 | strcat (target, nm); | |
4887597a | 1460 | |
e8d32c7e | 1461 | /* Now canonicalize by removing /. and /foo/.. if they appear. */ |
4887597a EZ |
1462 | |
1463 | p = target; | |
1464 | o = target; | |
1465 | ||
1466 | while (*p) | |
1467 | { | |
4887597a EZ |
1468 | if (*p != '/') |
1469 | { | |
1470 | *o++ = *p++; | |
1471 | } | |
1472 | else if (!strncmp (p, "//", 2) | |
4887597a EZ |
1473 | ) |
1474 | { | |
1475 | o = target; | |
1476 | p++; | |
1477 | } | |
994a7262 RS |
1478 | else if (p[0] == '/' && p[1] == '.' |
1479 | && (p[2] == '/' || p[2] == 0)) | |
4887597a EZ |
1480 | p += 2; |
1481 | else if (!strncmp (p, "/..", 3) | |
1482 | /* `/../' is the "superroot" on certain file systems. */ | |
1483 | && o != target | |
1484 | && (p[3] == '/' || p[3] == 0)) | |
1485 | { | |
1486 | while (o != target && *--o != '/') | |
1487 | ; | |
4887597a EZ |
1488 | if (o == target && *o == '/') |
1489 | ++o; | |
1490 | p += 3; | |
1491 | } | |
1492 | else | |
1493 | { | |
1494 | *o++ = *p++; | |
1495 | } | |
4887597a EZ |
1496 | } |
1497 | ||
1498 | return make_string (target, o - target); | |
1499 | } | |
1500 | #endif | |
570d7624 | 1501 | \f |
c70a4df6 SM |
1502 | /* If /~ or // appears, discard everything through first slash. */ |
1503 | static int | |
5976c3fe | 1504 | file_name_absolute_p (const char *filename) |
c70a4df6 SM |
1505 | { |
1506 | return | |
1507 | (IS_DIRECTORY_SEP (*filename) || *filename == '~' | |
c70a4df6 SM |
1508 | #ifdef DOS_NT |
1509 | || (IS_DRIVE (*filename) && IS_DEVICE_SEP (filename[1]) | |
1510 | && IS_DIRECTORY_SEP (filename[2])) | |
1511 | #endif | |
1512 | ); | |
1513 | } | |
1514 | ||
5976c3fe PE |
1515 | static char * |
1516 | search_embedded_absfilename (char *nm, char *endp) | |
c70a4df6 | 1517 | { |
5976c3fe | 1518 | char *p, *s; |
c70a4df6 SM |
1519 | |
1520 | for (p = nm + 1; p < endp; p++) | |
1521 | { | |
1522 | if ((0 | |
c70a4df6 SM |
1523 | || IS_DIRECTORY_SEP (p[-1])) |
1524 | && file_name_absolute_p (p) | |
5e617bc2 | 1525 | #if defined (WINDOWSNT) || defined (CYGWIN) |
c70a4df6 SM |
1526 | /* // at start of file name is meaningful in Apollo, |
1527 | WindowsNT and Cygwin systems. */ | |
f34574c6 | 1528 | && !(IS_DIRECTORY_SEP (p[0]) && p - 1 == nm) |
e39a993c | 1529 | #endif /* not (WINDOWSNT || CYGWIN) */ |
c70a4df6 SM |
1530 | ) |
1531 | { | |
7c2fb837 | 1532 | for (s = p; *s && (!IS_DIRECTORY_SEP (*s)); s++); |
e8d32c7e | 1533 | if (p[0] == '~' && s > p + 1) /* We've got "/~something/". */ |
c70a4df6 | 1534 | { |
5976c3fe | 1535 | char *o = alloca (s - p + 1); |
c70a4df6 | 1536 | struct passwd *pw; |
72af86bd | 1537 | memcpy (o, p, s - p); |
c70a4df6 SM |
1538 | o [s - p] = 0; |
1539 | ||
1540 | /* If we have ~user and `user' exists, discard | |
1541 | everything up to ~. But if `user' does not exist, leave | |
1542 | ~user alone, it might be a literal file name. */ | |
67c08d6c YM |
1543 | BLOCK_INPUT; |
1544 | pw = getpwnam (o + 1); | |
1545 | UNBLOCK_INPUT; | |
1546 | if (pw) | |
c70a4df6 | 1547 | return p; |
c70a4df6 SM |
1548 | } |
1549 | else | |
1550 | return p; | |
1551 | } | |
1552 | } | |
1553 | return NULL; | |
1554 | } | |
1555 | ||
a7ca3326 | 1556 | DEFUN ("substitute-in-file-name", Fsubstitute_in_file_name, |
8c1a1077 PJ |
1557 | Ssubstitute_in_file_name, 1, 1, 0, |
1558 | doc: /* Substitute environment variables referred to in FILENAME. | |
1559 | `$FOO' where FOO is an environment variable name means to substitute | |
1560 | the value of that variable. The variable name should be terminated | |
1561 | with a character not a letter, digit or underscore; otherwise, enclose | |
1562 | the entire variable name in braces. | |
c68845e0 GM |
1563 | |
1564 | If `/~' appears, all of FILENAME through that `/' is discarded. | |
1565 | If `//' appears, everything up to and including the first of | |
1566 | those `/' is discarded. */) | |
5842a27b | 1567 | (Lisp_Object filename) |
570d7624 | 1568 | { |
5976c3fe | 1569 | char *nm; |
570d7624 | 1570 | |
5976c3fe PE |
1571 | register char *s, *p, *o, *x, *endp; |
1572 | char *target = NULL; | |
570d7624 JB |
1573 | int total = 0; |
1574 | int substituted = 0; | |
58aec0d6 | 1575 | int multibyte; |
5976c3fe | 1576 | char *xnm; |
8ce069f5 | 1577 | Lisp_Object handler; |
570d7624 | 1578 | |
b7826503 | 1579 | CHECK_STRING (filename); |
570d7624 | 1580 | |
58aec0d6 JR |
1581 | multibyte = STRING_MULTIBYTE (filename); |
1582 | ||
8ce069f5 RS |
1583 | /* If the file name has special constructs in it, |
1584 | call the corresponding file handler. */ | |
3b7f6e60 | 1585 | handler = Ffind_file_name_handler (filename, Qsubstitute_in_file_name); |
8ce069f5 | 1586 | if (!NILP (handler)) |
2375c96a CY |
1587 | { |
1588 | Lisp_Object handled_name = call2 (handler, Qsubstitute_in_file_name, | |
1589 | filename); | |
1590 | if (STRINGP (handled_name)) | |
1591 | return handled_name; | |
1592 | error ("Invalid handler in `file-name-handler-alist'"); | |
1593 | } | |
8ce069f5 | 1594 | |
58aec0d6 JR |
1595 | /* Always work on a copy of the string, in case GC happens during |
1596 | decode of environment variables, causing the original Lisp_String | |
1597 | data to be relocated. */ | |
38182d90 | 1598 | nm = alloca (SBYTES (filename) + 1); |
72af86bd | 1599 | memcpy (nm, SDATA (filename), SBYTES (filename) + 1); |
0f3f018c | 1600 | |
58aec0d6 | 1601 | #ifdef DOS_NT |
087fc47a | 1602 | dostounix_filename (nm); |
d5db4077 | 1603 | substituted = (strcmp (nm, SDATA (filename)) != 0); |
a5a1cc06 | 1604 | #endif |
d5db4077 | 1605 | endp = nm + SBYTES (filename); |
570d7624 | 1606 | |
82330e7f | 1607 | /* If /~ or // appears, discard everything through first slash. */ |
c70a4df6 SM |
1608 | p = search_embedded_absfilename (nm, endp); |
1609 | if (p) | |
1610 | /* Start over with the new string, so we check the file-name-handler | |
1611 | again. Important with filenames like "/home/foo//:/hello///there" | |
ee7683eb | 1612 | which would substitute to "/:/hello///there" rather than "/there". */ |
c70a4df6 | 1613 | return Fsubstitute_in_file_name |
58aec0d6 | 1614 | (make_specified_string (p, -1, endp - p, multibyte)); |
570d7624 JB |
1615 | |
1616 | /* See if any variables are substituted into the string | |
e8d32c7e | 1617 | and find the total length of their values in `total'. */ |
570d7624 JB |
1618 | |
1619 | for (p = nm; p != endp;) | |
1620 | if (*p != '$') | |
1621 | p++; | |
1622 | else | |
1623 | { | |
1624 | p++; | |
1625 | if (p == endp) | |
1626 | goto badsubst; | |
1627 | else if (*p == '$') | |
1628 | { | |
e8d32c7e | 1629 | /* "$$" means a single "$". */ |
570d7624 JB |
1630 | p++; |
1631 | total -= 1; | |
1632 | substituted = 1; | |
1633 | continue; | |
1634 | } | |
1635 | else if (*p == '{') | |
1636 | { | |
1637 | o = ++p; | |
1638 | while (p != endp && *p != '}') p++; | |
1639 | if (*p != '}') goto missingclose; | |
1640 | s = p; | |
1641 | } | |
1642 | else | |
1643 | { | |
1644 | o = p; | |
1645 | while (p != endp && (isalnum (*p) || *p == '_')) p++; | |
1646 | s = p; | |
1647 | } | |
1648 | ||
e8d32c7e | 1649 | /* Copy out the variable name. */ |
38182d90 | 1650 | target = alloca (s - o + 1); |
570d7624 JB |
1651 | strncpy (target, o, s - o); |
1652 | target[s - o] = 0; | |
5e570b75 | 1653 | #ifdef DOS_NT |
4c3c22f3 | 1654 | strupr (target); /* $home == $HOME etc. */ |
5e570b75 | 1655 | #endif /* DOS_NT */ |
570d7624 | 1656 | |
e8d32c7e | 1657 | /* Get variable value. */ |
5976c3fe | 1658 | o = egetenv (target); |
8d2ced53 | 1659 | if (o) |
58aec0d6 JR |
1660 | { |
1661 | /* Don't try to guess a maximum length - UTF8 can use up to | |
1662 | four bytes per character. This code is unlikely to run | |
1663 | in a situation that requires performance, so decoding the | |
1664 | env variables twice should be acceptable. Note that | |
1665 | decoding may cause a garbage collect. */ | |
1666 | Lisp_Object orig, decoded; | |
1667 | orig = make_unibyte_string (o, strlen (o)); | |
1668 | decoded = DECODE_FILE (orig); | |
1669 | total += SBYTES (decoded); | |
8d2ced53 SM |
1670 | substituted = 1; |
1671 | } | |
1672 | else if (*p == '}') | |
1673 | goto badvar; | |
570d7624 JB |
1674 | } |
1675 | ||
1676 | if (!substituted) | |
3b7f6e60 | 1677 | return filename; |
570d7624 | 1678 | |
e8d32c7e SM |
1679 | /* If substitution required, recopy the string and do it. */ |
1680 | /* Make space in stack frame for the new copy. */ | |
38182d90 | 1681 | xnm = alloca (SBYTES (filename) + total + 1); |
570d7624 JB |
1682 | x = xnm; |
1683 | ||
e8d32c7e | 1684 | /* Copy the rest of the name through, replacing $ constructs with values. */ |
570d7624 JB |
1685 | for (p = nm; *p;) |
1686 | if (*p != '$') | |
1687 | *x++ = *p++; | |
1688 | else | |
1689 | { | |
1690 | p++; | |
1691 | if (p == endp) | |
1692 | goto badsubst; | |
1693 | else if (*p == '$') | |
1694 | { | |
1695 | *x++ = *p++; | |
1696 | continue; | |
1697 | } | |
1698 | else if (*p == '{') | |
1699 | { | |
1700 | o = ++p; | |
1701 | while (p != endp && *p != '}') p++; | |
1702 | if (*p != '}') goto missingclose; | |
1703 | s = p++; | |
1704 | } | |
1705 | else | |
1706 | { | |
1707 | o = p; | |
1708 | while (p != endp && (isalnum (*p) || *p == '_')) p++; | |
1709 | s = p; | |
1710 | } | |
1711 | ||
e8d32c7e | 1712 | /* Copy out the variable name. */ |
38182d90 | 1713 | target = alloca (s - o + 1); |
570d7624 JB |
1714 | strncpy (target, o, s - o); |
1715 | target[s - o] = 0; | |
5e570b75 | 1716 | #ifdef DOS_NT |
4c3c22f3 | 1717 | strupr (target); /* $home == $HOME etc. */ |
5e570b75 | 1718 | #endif /* DOS_NT */ |
570d7624 | 1719 | |
e8d32c7e | 1720 | /* Get variable value. */ |
5976c3fe | 1721 | o = egetenv (target); |
570d7624 | 1722 | if (!o) |
8d2ced53 SM |
1723 | { |
1724 | *x++ = '$'; | |
1725 | strcpy (x, target); x+= strlen (target); | |
1726 | } | |
60d67b83 RS |
1727 | else |
1728 | { | |
58aec0d6 | 1729 | Lisp_Object orig, decoded; |
93f4cf88 | 1730 | ptrdiff_t orig_length, decoded_length; |
58aec0d6 JR |
1731 | orig_length = strlen (o); |
1732 | orig = make_unibyte_string (o, orig_length); | |
1733 | decoded = DECODE_FILE (orig); | |
1734 | decoded_length = SBYTES (decoded); | |
42a5b22f | 1735 | strncpy (x, SSDATA (decoded), decoded_length); |
58aec0d6 JR |
1736 | x += decoded_length; |
1737 | ||
1738 | /* If environment variable needed decoding, return value | |
1739 | needs to be multibyte. */ | |
1740 | if (decoded_length != orig_length | |
42a5b22f | 1741 | || strncmp (SSDATA (decoded), o, orig_length)) |
58aec0d6 | 1742 | multibyte = 1; |
60d67b83 | 1743 | } |
570d7624 JB |
1744 | } |
1745 | ||
1746 | *x = 0; | |
1747 | ||
82330e7f | 1748 | /* If /~ or // appears, discard everything through first slash. */ |
c70a4df6 SM |
1749 | while ((p = search_embedded_absfilename (xnm, x))) |
1750 | /* This time we do not start over because we've already expanded envvars | |
1751 | and replaced $$ with $. Maybe we should start over as well, but we'd | |
1752 | need to quote some $ to $$ first. */ | |
1753 | xnm = p; | |
570d7624 | 1754 | |
58aec0d6 | 1755 | return make_specified_string (xnm, -1, x - xnm, multibyte); |
570d7624 JB |
1756 | |
1757 | badsubst: | |
1758 | error ("Bad format environment-variable substitution"); | |
1759 | missingclose: | |
1760 | error ("Missing \"}\" in environment-variable substitution"); | |
1761 | badvar: | |
1762 | error ("Substituting nonexistent environment variable \"%s\"", target); | |
1763 | ||
1764 | /* NOTREACHED */ | |
6bbd7a29 | 1765 | return Qnil; |
570d7624 JB |
1766 | } |
1767 | \f | |
067ffa38 | 1768 | /* A slightly faster and more convenient way to get |
298b760e | 1769 | (directory-file-name (expand-file-name FOO)). */ |
067ffa38 | 1770 | |
570d7624 | 1771 | Lisp_Object |
971de7fb | 1772 | expand_and_dir_to_file (Lisp_Object filename, Lisp_Object defdir) |
570d7624 | 1773 | { |
199607e4 | 1774 | register Lisp_Object absname; |
570d7624 | 1775 | |
199607e4 | 1776 | absname = Fexpand_file_name (filename, defdir); |
7c2fb837 | 1777 | |
199607e4 | 1778 | /* Remove final slash, if any (unless this is the root dir). |
570d7624 | 1779 | stat behaves differently depending! */ |
d5db4077 KR |
1780 | if (SCHARS (absname) > 1 |
1781 | && IS_DIRECTORY_SEP (SREF (absname, SBYTES (absname) - 1)) | |
e8d32c7e | 1782 | && !IS_DEVICE_SEP (SREF (absname, SBYTES (absname) - 2))) |
ddc61f46 | 1783 | /* We cannot take shortcuts; they might be wrong for magic file names. */ |
199607e4 | 1784 | absname = Fdirectory_file_name (absname); |
199607e4 | 1785 | return absname; |
570d7624 JB |
1786 | } |
1787 | \f | |
3ed15d97 RS |
1788 | /* Signal an error if the file ABSNAME already exists. |
1789 | If INTERACTIVE is nonzero, ask the user whether to proceed, | |
1790 | and bypass the error if the user says to go ahead. | |
1791 | QUERYSTRING is a name for the action that is being considered | |
1792 | to alter the file. | |
de1d0127 | 1793 | |
3ed15d97 | 1794 | *STATPTR is used to store the stat information if the file exists. |
de1d0127 | 1795 | If the file does not exist, STATPTR->st_mode is set to 0. |
b8b29dc9 RS |
1796 | If STATPTR is null, we don't store into it. |
1797 | ||
1798 | If QUICK is nonzero, we ask for y or n, not yes or no. */ | |
3ed15d97 | 1799 | |
f14b7e14 | 1800 | static void |
5976c3fe PE |
1801 | barf_or_query_if_file_exists (Lisp_Object absname, const char *querystring, |
1802 | int interactive, struct stat *statptr, int quick) | |
570d7624 | 1803 | { |
643c73b9 | 1804 | register Lisp_Object tem, encoded_filename; |
4018b5ef | 1805 | struct stat statbuf; |
570d7624 JB |
1806 | struct gcpro gcpro1; |
1807 | ||
643c73b9 RS |
1808 | encoded_filename = ENCODE_FILE (absname); |
1809 | ||
e8d32c7e | 1810 | /* `stat' is a good way to tell whether the file exists, |
4018b5ef | 1811 | regardless of what access permissions it has. */ |
42a5b22f | 1812 | if (lstat (SSDATA (encoded_filename), &statbuf) >= 0) |
570d7624 | 1813 | { |
6e9b2be9 | 1814 | if (S_ISDIR (statbuf.st_mode)) |
c4f2d8d4 | 1815 | xsignal2 (Qfile_error, |
ad637907 | 1816 | build_string ("File is a directory"), absname); |
c4f2d8d4 | 1817 | |
570d7624 | 1818 | if (! interactive) |
24b1ddad KS |
1819 | xsignal2 (Qfile_already_exists, |
1820 | build_string ("File already exists"), absname); | |
570d7624 | 1821 | GCPRO1 (absname); |
67e8e2b8 RS |
1822 | tem = format2 ("File %s already exists; %s anyway? ", |
1823 | absname, build_string (querystring)); | |
b8b29dc9 | 1824 | if (quick) |
5616cc54 | 1825 | tem = call1 (intern ("y-or-n-p"), tem); |
b8b29dc9 RS |
1826 | else |
1827 | tem = do_yes_or_no_p (tem); | |
570d7624 | 1828 | UNGCPRO; |
265a9e55 | 1829 | if (NILP (tem)) |
24b1ddad KS |
1830 | xsignal2 (Qfile_already_exists, |
1831 | build_string ("File already exists"), absname); | |
3ed15d97 RS |
1832 | if (statptr) |
1833 | *statptr = statbuf; | |
1834 | } | |
1835 | else | |
1836 | { | |
1837 | if (statptr) | |
1838 | statptr->st_mode = 0; | |
570d7624 JB |
1839 | } |
1840 | return; | |
1841 | } | |
1842 | ||
574c05e2 | 1843 | DEFUN ("copy-file", Fcopy_file, Scopy_file, 2, 6, |
7c0f6118 | 1844 | "fCopy file: \nGCopy %s to file: \np\nP", |
8c1a1077 PJ |
1845 | doc: /* Copy FILE to NEWNAME. Both args must be strings. |
1846 | If NEWNAME names a directory, copy FILE there. | |
795c20df CY |
1847 | |
1848 | This function always sets the file modes of the output file to match | |
1849 | the input file. | |
1850 | ||
1851 | The optional third argument OK-IF-ALREADY-EXISTS specifies what to do | |
1852 | if file NEWNAME already exists. If OK-IF-ALREADY-EXISTS is nil, we | |
1853 | signal a `file-already-exists' error without overwriting. If | |
1854 | OK-IF-ALREADY-EXISTS is a number, we request confirmation from the user | |
1855 | about overwriting; this is what happens in interactive use with M-x. | |
1856 | Any other value for OK-IF-ALREADY-EXISTS means to overwrite the | |
1857 | existing file. | |
c50f15d0 | 1858 | |
7f08b80e | 1859 | Fourth arg KEEP-TIME non-nil means give the output file the same |
8c1a1077 | 1860 | last-modified time as the old one. (This works on only some systems.) |
c50f15d0 | 1861 | |
7fce7dfe EZ |
1862 | A prefix arg makes KEEP-TIME non-nil. |
1863 | ||
586702ce | 1864 | If PRESERVE-UID-GID is non-nil, we try to transfer the |
574c05e2 KK |
1865 | uid and gid of FILE to NEWNAME. |
1866 | ||
f5783df3 | 1867 | If PRESERVE-SELINUX-CONTEXT is non-nil and SELinux is enabled |
574c05e2 | 1868 | on the system, we copy the SELinux context of FILE to NEWNAME. */) |
5842a27b | 1869 | (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 | 1870 | { |
8a2cbd72 | 1871 | int ifd, ofd; |
d311d28c | 1872 | int n; |
570d7624 | 1873 | char buf[16 * 1024]; |
3ed15d97 | 1874 | struct stat st, out_st; |
32f4334d | 1875 | Lisp_Object handler; |
b1d1b865 | 1876 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; |
d311d28c | 1877 | ptrdiff_t count = SPECPDL_INDEX (); |
f73b0ada | 1878 | int input_file_statable_p; |
b1d1b865 | 1879 | Lisp_Object encoded_file, encoded_newname; |
574c05e2 KK |
1880 | #if HAVE_LIBSELINUX |
1881 | security_context_t con; | |
1882 | int fail, conlength = 0; | |
1883 | #endif | |
570d7624 | 1884 | |
b1d1b865 RS |
1885 | encoded_file = encoded_newname = Qnil; |
1886 | GCPRO4 (file, newname, encoded_file, encoded_newname); | |
b7826503 PJ |
1887 | CHECK_STRING (file); |
1888 | CHECK_STRING (newname); | |
b1d1b865 | 1889 | |
a9d14e54 | 1890 | if (!NILP (Ffile_directory_p (newname))) |
6b61353c | 1891 | newname = Fexpand_file_name (Ffile_name_nondirectory (file), newname); |
a9d14e54 GM |
1892 | else |
1893 | newname = Fexpand_file_name (newname, Qnil); | |
1894 | ||
3b7f6e60 | 1895 | file = Fexpand_file_name (file, Qnil); |
32f4334d | 1896 | |
0bf2eed2 | 1897 | /* If the input file name has special constructs in it, |
32f4334d | 1898 | call the corresponding file handler. */ |
3b7f6e60 | 1899 | handler = Ffind_file_name_handler (file, Qcopy_file); |
0bf2eed2 | 1900 | /* Likewise for output file name. */ |
51cf6d37 | 1901 | if (NILP (handler)) |
49307295 | 1902 | handler = Ffind_file_name_handler (newname, Qcopy_file); |
32f4334d | 1903 | if (!NILP (handler)) |
574c05e2 KK |
1904 | RETURN_UNGCPRO (call7 (handler, Qcopy_file, file, newname, |
1905 | ok_if_already_exists, keep_time, preserve_uid_gid, | |
1906 | preserve_selinux_context)); | |
32f4334d | 1907 | |
b1d1b865 RS |
1908 | encoded_file = ENCODE_FILE (file); |
1909 | encoded_newname = ENCODE_FILE (newname); | |
1910 | ||
265a9e55 | 1911 | if (NILP (ok_if_already_exists) |
93c30b5f | 1912 | || INTEGERP (ok_if_already_exists)) |
2f868094 | 1913 | barf_or_query_if_file_exists (newname, "copy to it", |
b8b29dc9 | 1914 | INTEGERP (ok_if_already_exists), &out_st, 0); |
42a5b22f | 1915 | else if (stat (SSDATA (encoded_newname), &out_st) < 0) |
3ed15d97 | 1916 | out_st.st_mode = 0; |
570d7624 | 1917 | |
e8691c59 | 1918 | #ifdef WINDOWSNT |
d5db4077 | 1919 | if (!CopyFile (SDATA (encoded_file), |
efdc16c9 | 1920 | SDATA (encoded_newname), |
e8691c59 GM |
1921 | FALSE)) |
1922 | report_file_error ("Copying file", Fcons (file, Fcons (newname, Qnil))); | |
8b53dc06 JR |
1923 | /* CopyFile retains the timestamp by default. */ |
1924 | else if (NILP (keep_time)) | |
e8691c59 GM |
1925 | { |
1926 | EMACS_TIME now; | |
ad497129 JR |
1927 | DWORD attributes; |
1928 | char * filename; | |
1929 | ||
e8691c59 | 1930 | EMACS_GET_TIME (now); |
d5db4077 | 1931 | filename = SDATA (encoded_newname); |
ad497129 JR |
1932 | |
1933 | /* Ensure file is writable while its modified time is set. */ | |
1934 | attributes = GetFileAttributes (filename); | |
02cca86b | 1935 | SetFileAttributes (filename, attributes & ~FILE_ATTRIBUTE_READONLY); |
d35af63c | 1936 | if (set_file_times (-1, filename, now, now)) |
ad497129 JR |
1937 | { |
1938 | /* Restore original attributes. */ | |
1939 | SetFileAttributes (filename, attributes); | |
24b1ddad KS |
1940 | xsignal2 (Qfile_date_error, |
1941 | build_string ("Cannot set file date"), newname); | |
ad497129 JR |
1942 | } |
1943 | /* Restore original attributes. */ | |
1944 | SetFileAttributes (filename, attributes); | |
e8691c59 GM |
1945 | } |
1946 | #else /* not WINDOWSNT */ | |
13336908 | 1947 | immediate_quit = 1; |
42a5b22f | 1948 | ifd = emacs_open (SSDATA (encoded_file), O_RDONLY, 0); |
13336908 RS |
1949 | immediate_quit = 0; |
1950 | ||
570d7624 | 1951 | if (ifd < 0) |
3b7f6e60 | 1952 | report_file_error ("Opening input file", Fcons (file, Qnil)); |
570d7624 | 1953 | |
b5148e85 RS |
1954 | record_unwind_protect (close_file_unwind, make_number (ifd)); |
1955 | ||
f73b0ada BF |
1956 | /* We can only copy regular files and symbolic links. Other files are not |
1957 | copyable by us. */ | |
1958 | input_file_statable_p = (fstat (ifd, &st) >= 0); | |
1959 | ||
574c05e2 KK |
1960 | #if HAVE_LIBSELINUX |
1961 | if (!NILP (preserve_selinux_context) && is_selinux_enabled ()) | |
1962 | { | |
1963 | conlength = fgetfilecon (ifd, &con); | |
1964 | if (conlength == -1) | |
1965 | report_file_error ("Doing fgetfilecon", Fcons (file, Qnil)); | |
1966 | } | |
1967 | #endif | |
1968 | ||
3ed15d97 RS |
1969 | if (out_st.st_mode != 0 |
1970 | && st.st_dev == out_st.st_dev && st.st_ino == out_st.st_ino) | |
1971 | { | |
1972 | errno = 0; | |
1973 | report_file_error ("Input and output files are the same", | |
3b7f6e60 | 1974 | Fcons (file, Fcons (newname, Qnil))); |
3ed15d97 | 1975 | } |
3ed15d97 | 1976 | |
f73b0ada BF |
1977 | if (input_file_statable_p) |
1978 | { | |
1979 | if (!(S_ISREG (st.st_mode)) && !(S_ISLNK (st.st_mode))) | |
1980 | { | |
1981 | #if defined (EISDIR) | |
1982 | /* Get a better looking error message. */ | |
1983 | errno = EISDIR; | |
1984 | #endif /* EISDIR */ | |
3b7f6e60 | 1985 | report_file_error ("Non-regular file", Fcons (file, Qnil)); |
f73b0ada BF |
1986 | } |
1987 | } | |
f73b0ada | 1988 | |
4c3c22f3 RS |
1989 | #ifdef MSDOS |
1990 | /* System's default file type was set to binary by _fmode in emacs.c. */ | |
c50f15d0 | 1991 | ofd = emacs_open (SDATA (encoded_newname), |
7fce7dfe | 1992 | O_WRONLY | O_TRUNC | O_CREAT |
795c20df | 1993 | | (NILP (ok_if_already_exists) ? O_EXCL : 0), |
c50f15d0 RS |
1994 | S_IREAD | S_IWRITE); |
1995 | #else /* not MSDOS */ | |
15e3a074 PE |
1996 | { |
1997 | int new_mask = 0666; | |
1998 | if (input_file_statable_p) | |
1999 | { | |
2000 | if (!NILP (preserve_uid_gid)) | |
2001 | new_mask = 0600; | |
2002 | new_mask &= st.st_mode; | |
2003 | } | |
2004 | ofd = emacs_open (SSDATA (encoded_newname), | |
2005 | (O_WRONLY | O_TRUNC | O_CREAT | |
2006 | | (NILP (ok_if_already_exists) ? O_EXCL : 0)), | |
2007 | new_mask); | |
2008 | } | |
4c3c22f3 | 2009 | #endif /* not MSDOS */ |
570d7624 | 2010 | if (ofd < 0) |
3ed15d97 | 2011 | report_file_error ("Opening output file", Fcons (newname, Qnil)); |
b5148e85 RS |
2012 | |
2013 | record_unwind_protect (close_file_unwind, make_number (ofd)); | |
570d7624 | 2014 | |
b5148e85 RS |
2015 | immediate_quit = 1; |
2016 | QUIT; | |
68c45bf0 PE |
2017 | while ((n = emacs_read (ifd, buf, sizeof buf)) > 0) |
2018 | if (emacs_write (ofd, buf, n) != n) | |
3ed15d97 | 2019 | report_file_error ("I/O error", Fcons (newname, Qnil)); |
b5148e85 | 2020 | immediate_quit = 0; |
570d7624 | 2021 | |
b016179b EZ |
2022 | #ifndef MSDOS |
2023 | /* Preserve the original file modes, and if requested, also its | |
2024 | owner and group. */ | |
586702ce RS |
2025 | if (input_file_statable_p) |
2026 | { | |
b59b67c5 | 2027 | int mode_mask = 07777; |
a8031457 | 2028 | if (!NILP (preserve_uid_gid)) |
b59b67c5 PE |
2029 | { |
2030 | /* Attempt to change owner and group. If that doesn't work | |
2031 | attempt to change just the group, as that is sometimes allowed. | |
2032 | Adjust the mode mask to eliminate setuid or setgid bits | |
2033 | that are inappropriate if the owner and group are wrong. */ | |
2034 | if (fchown (ofd, st.st_uid, st.st_gid) != 0) | |
2035 | { | |
2036 | mode_mask &= ~06000; | |
2037 | if (fchown (ofd, -1, st.st_gid) == 0) | |
2038 | mode_mask |= 02000; | |
2039 | } | |
2040 | } | |
2041 | if (fchmod (ofd, st.st_mode & mode_mask) != 0) | |
81e56e61 | 2042 | report_file_error ("Doing chmod", Fcons (newname, Qnil)); |
586702ce | 2043 | } |
b016179b | 2044 | #endif /* not MSDOS */ |
586702ce | 2045 | |
574c05e2 KK |
2046 | #if HAVE_LIBSELINUX |
2047 | if (conlength > 0) | |
2048 | { | |
24c51a09 | 2049 | /* Set the modified context back to the file. */ |
574c05e2 | 2050 | fail = fsetfilecon (ofd, con); |
24c51a09 GM |
2051 | /* See http://debbugs.gnu.org/11245 for ENOTSUP. */ |
2052 | if (fail && errno != ENOTSUP) | |
574c05e2 KK |
2053 | report_file_error ("Doing fsetfilecon", Fcons (newname, Qnil)); |
2054 | ||
2055 | freecon (con); | |
2056 | } | |
2057 | #endif | |
2058 | ||
f73b0ada | 2059 | if (input_file_statable_p) |
570d7624 | 2060 | { |
8ca6602c | 2061 | if (!NILP (keep_time)) |
570d7624 | 2062 | { |
d35af63c PE |
2063 | EMACS_TIME atime = get_stat_atime (&st); |
2064 | EMACS_TIME mtime = get_stat_mtime (&st); | |
2065 | if (set_file_times (ofd, SSDATA (encoded_newname), atime, mtime)) | |
24b1ddad KS |
2066 | xsignal2 (Qfile_date_error, |
2067 | build_string ("Cannot set file date"), newname); | |
570d7624 | 2068 | } |
570d7624 JB |
2069 | } |
2070 | ||
d35af63c PE |
2071 | if (emacs_close (ofd) < 0) |
2072 | report_file_error ("I/O error", Fcons (newname, Qnil)); | |
2073 | ||
68c45bf0 | 2074 | emacs_close (ifd); |
b016179b | 2075 | |
ed68db4d | 2076 | #ifdef MSDOS |
b016179b EZ |
2077 | if (input_file_statable_p) |
2078 | { | |
2079 | /* In DJGPP v2.0 and later, fstat usually returns true file mode bits, | |
2080 | and if it can't, it tells so. Otherwise, under MSDOS we usually | |
2081 | get only the READ bit, which will make the copied file read-only, | |
2082 | so it's better not to chmod at all. */ | |
2083 | if ((_djstat_flags & _STFAIL_WRITEBIT) == 0) | |
2084 | chmod (SDATA (encoded_newname), st.st_mode & 07777); | |
2085 | } | |
ed68db4d | 2086 | #endif /* MSDOS */ |
b016179b | 2087 | #endif /* not WINDOWSNT */ |
5acac34e | 2088 | |
b5148e85 RS |
2089 | /* Discard the unwind protects. */ |
2090 | specpdl_ptr = specpdl + count; | |
2091 | ||
570d7624 JB |
2092 | UNGCPRO; |
2093 | return Qnil; | |
2094 | } | |
385b6cc7 | 2095 | \f |
9bbe01fb | 2096 | DEFUN ("make-directory-internal", Fmake_directory_internal, |
353cfc19 | 2097 | Smake_directory_internal, 1, 1, 0, |
8c1a1077 | 2098 | doc: /* Create a new directory named DIRECTORY. */) |
5842a27b | 2099 | (Lisp_Object directory) |
570d7624 | 2100 | { |
5976c3fe | 2101 | const char *dir; |
32f4334d | 2102 | Lisp_Object handler; |
b1d1b865 | 2103 | Lisp_Object encoded_dir; |
570d7624 | 2104 | |
b7826503 | 2105 | CHECK_STRING (directory); |
3b7f6e60 | 2106 | directory = Fexpand_file_name (directory, Qnil); |
32f4334d | 2107 | |
3b7f6e60 | 2108 | handler = Ffind_file_name_handler (directory, Qmake_directory_internal); |
32f4334d | 2109 | if (!NILP (handler)) |
3b7f6e60 | 2110 | return call2 (handler, Qmake_directory_internal, directory); |
9bbe01fb | 2111 | |
b1d1b865 RS |
2112 | encoded_dir = ENCODE_FILE (directory); |
2113 | ||
5976c3fe | 2114 | dir = SSDATA (encoded_dir); |
570d7624 | 2115 | |
5e570b75 RS |
2116 | #ifdef WINDOWSNT |
2117 | if (mkdir (dir) != 0) | |
2118 | #else | |
09450bae | 2119 | if (mkdir (dir, 0777 & ~auto_saving_dir_umask) != 0) |
5e570b75 | 2120 | #endif |
a9f2aeae | 2121 | report_file_error ("Creating directory", list1 (directory)); |
570d7624 | 2122 | |
32f4334d | 2123 | return Qnil; |
570d7624 JB |
2124 | } |
2125 | ||
9d8f3bd9 MA |
2126 | DEFUN ("delete-directory-internal", Fdelete_directory_internal, |
2127 | Sdelete_directory_internal, 1, 1, 0, | |
efdc16c9 | 2128 | doc: /* Delete the directory named DIRECTORY. Does not follow symlinks. */) |
5842a27b | 2129 | (Lisp_Object directory) |
570d7624 | 2130 | { |
5976c3fe | 2131 | const char *dir; |
b1d1b865 | 2132 | Lisp_Object encoded_dir; |
570d7624 | 2133 | |
b7826503 | 2134 | CHECK_STRING (directory); |
3b7f6e60 | 2135 | directory = Fdirectory_file_name (Fexpand_file_name (directory, Qnil)); |
b1d1b865 | 2136 | encoded_dir = ENCODE_FILE (directory); |
5976c3fe | 2137 | dir = SSDATA (encoded_dir); |
b1d1b865 | 2138 | |
570d7624 | 2139 | if (rmdir (dir) != 0) |
a9f2aeae | 2140 | report_file_error ("Removing directory", list1 (directory)); |
570d7624 JB |
2141 | |
2142 | return Qnil; | |
2143 | } | |
2144 | ||
2e2bbddb | 2145 | DEFUN ("delete-file", Fdelete_file, Sdelete_file, 1, 2, |
f1a5d776 CY |
2146 | "(list (read-file-name \ |
2147 | (if (and delete-by-moving-to-trash (null current-prefix-arg)) \ | |
2148 | \"Move file to trash: \" \"Delete file: \") \ | |
2149 | nil default-directory (confirm-nonexistent-file-or-buffer)) \ | |
2150 | (null current-prefix-arg))", | |
efdc16c9 | 2151 | doc: /* Delete file named FILENAME. If it is a symlink, remove the symlink. |
53967e09 | 2152 | If file has multiple names, it continues to exist with the other names. |
f1a5d776 CY |
2153 | TRASH non-nil means to trash the file instead of deleting, provided |
2154 | `delete-by-moving-to-trash' is non-nil. | |
53967e09 | 2155 | |
f1a5d776 CY |
2156 | When called interactively, TRASH is t if no prefix argument is given. |
2157 | With a prefix argument, TRASH is nil. */) | |
5842a27b | 2158 | (Lisp_Object filename, Lisp_Object trash) |
570d7624 | 2159 | { |
32f4334d | 2160 | Lisp_Object handler; |
b1d1b865 | 2161 | Lisp_Object encoded_file; |
efdc16c9 | 2162 | struct gcpro gcpro1; |
b1d1b865 | 2163 | |
efdc16c9 | 2164 | GCPRO1 (filename); |
b4bd27c5 RS |
2165 | if (!NILP (Ffile_directory_p (filename)) |
2166 | && NILP (Ffile_symlink_p (filename))) | |
24b1ddad KS |
2167 | xsignal2 (Qfile_error, |
2168 | build_string ("Removing old name: is a directory"), | |
2169 | filename); | |
efdc16c9 | 2170 | UNGCPRO; |
570d7624 | 2171 | filename = Fexpand_file_name (filename, Qnil); |
32f4334d | 2172 | |
49307295 | 2173 | handler = Ffind_file_name_handler (filename, Qdelete_file); |
32f4334d | 2174 | if (!NILP (handler)) |
f5783df3 | 2175 | return call3 (handler, Qdelete_file, filename, trash); |
32f4334d | 2176 | |
f1a5d776 | 2177 | if (delete_by_moving_to_trash && !NILP (trash)) |
6cf29fe8 JR |
2178 | return call1 (Qmove_file_to_trash, filename); |
2179 | ||
b1d1b865 RS |
2180 | encoded_file = ENCODE_FILE (filename); |
2181 | ||
42a5b22f | 2182 | if (0 > unlink (SSDATA (encoded_file))) |
a9f2aeae | 2183 | report_file_error ("Removing old name", list1 (filename)); |
8a9b0da9 | 2184 | return Qnil; |
570d7624 JB |
2185 | } |
2186 | ||
385b6cc7 | 2187 | static Lisp_Object |
971de7fb | 2188 | internal_delete_file_1 (Lisp_Object ignore) |
385b6cc7 RS |
2189 | { |
2190 | return Qt; | |
2191 | } | |
2192 | ||
53967e09 | 2193 | /* Delete file FILENAME, returning 1 if successful and 0 if failed. |
f1a5d776 | 2194 | This ignores `delete-by-moving-to-trash'. */ |
385b6cc7 RS |
2195 | |
2196 | int | |
f1a5d776 | 2197 | internal_delete_file (Lisp_Object filename) |
385b6cc7 | 2198 | { |
a3911e8c | 2199 | Lisp_Object tem; |
53967e09 | 2200 | |
f1a5d776 | 2201 | tem = internal_condition_case_2 (Fdelete_file, filename, Qnil, |
a3911e8c KR |
2202 | Qt, internal_delete_file_1); |
2203 | return NILP (tem); | |
385b6cc7 RS |
2204 | } |
2205 | \f | |
570d7624 | 2206 | DEFUN ("rename-file", Frename_file, Srename_file, 2, 3, |
7c0f6118 | 2207 | "fRename file: \nGRename %s to file: \np", |
a4e03fe5 | 2208 | doc: /* Rename FILE as NEWNAME. Both args must be strings. |
8c1a1077 PJ |
2209 | If file has names other than FILE, it continues to have those names. |
2210 | Signals a `file-already-exists' error if a file NEWNAME already exists | |
2211 | unless optional third argument OK-IF-ALREADY-EXISTS is non-nil. | |
2212 | A number as third arg means request confirmation if NEWNAME already exists. | |
2213 | This is what happens in interactive use with M-x. */) | |
5842a27b | 2214 | (Lisp_Object file, Lisp_Object newname, Lisp_Object ok_if_already_exists) |
570d7624 | 2215 | { |
32f4334d | 2216 | Lisp_Object handler; |
f72b5416 JD |
2217 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4, gcpro5; |
2218 | Lisp_Object encoded_file, encoded_newname, symlink_target; | |
570d7624 | 2219 | |
f72b5416 JD |
2220 | symlink_target = encoded_file = encoded_newname = Qnil; |
2221 | GCPRO5 (file, newname, encoded_file, encoded_newname, symlink_target); | |
b7826503 PJ |
2222 | CHECK_STRING (file); |
2223 | CHECK_STRING (newname); | |
3b7f6e60 | 2224 | file = Fexpand_file_name (file, Qnil); |
1ffc5c90 | 2225 | |
f83caf70 EZ |
2226 | if ((!NILP (Ffile_directory_p (newname))) |
2227 | #ifdef DOS_NT | |
2228 | /* If the file names are identical but for the case, | |
2229 | don't attempt to move directory to itself. */ | |
2230 | && (NILP (Fstring_equal (Fdowncase (file), Fdowncase (newname)))) | |
2231 | #endif | |
2232 | ) | |
8719abec CY |
2233 | { |
2234 | Lisp_Object fname = NILP (Ffile_directory_p (file)) | |
2235 | ? file : Fdirectory_file_name (file); | |
2236 | newname = Fexpand_file_name (Ffile_name_nondirectory (fname), newname); | |
2237 | } | |
1ffc5c90 RS |
2238 | else |
2239 | newname = Fexpand_file_name (newname, Qnil); | |
32f4334d RS |
2240 | |
2241 | /* If the file name has special constructs in it, | |
2242 | call the corresponding file handler. */ | |
3b7f6e60 | 2243 | handler = Ffind_file_name_handler (file, Qrename_file); |
51cf6d37 | 2244 | if (NILP (handler)) |
49307295 | 2245 | handler = Ffind_file_name_handler (newname, Qrename_file); |
32f4334d | 2246 | if (!NILP (handler)) |
36712b0a | 2247 | RETURN_UNGCPRO (call4 (handler, Qrename_file, |
3b7f6e60 | 2248 | file, newname, ok_if_already_exists)); |
32f4334d | 2249 | |
b1d1b865 RS |
2250 | encoded_file = ENCODE_FILE (file); |
2251 | encoded_newname = ENCODE_FILE (newname); | |
2252 | ||
bc77278f EZ |
2253 | #ifdef DOS_NT |
2254 | /* If the file names are identical but for the case, don't ask for | |
2255 | confirmation: they simply want to change the letter-case of the | |
2256 | file name. */ | |
2257 | if (NILP (Fstring_equal (Fdowncase (file), Fdowncase (newname)))) | |
2258 | #endif | |
265a9e55 | 2259 | if (NILP (ok_if_already_exists) |
93c30b5f | 2260 | || INTEGERP (ok_if_already_exists)) |
2f868094 | 2261 | barf_or_query_if_file_exists (newname, "rename to it", |
b8b29dc9 | 2262 | INTEGERP (ok_if_already_exists), 0, 0); |
42a5b22f | 2263 | if (0 > rename (SSDATA (encoded_file), SSDATA (encoded_newname))) |
570d7624 JB |
2264 | { |
2265 | if (errno == EXDEV) | |
2266 | { | |
d311d28c | 2267 | ptrdiff_t count; |
f72b5416 | 2268 | symlink_target = Ffile_symlink_p (file); |
440c7d00 JD |
2269 | if (! NILP (symlink_target)) |
2270 | Fmake_symbolic_link (symlink_target, newname, | |
f59abab9 | 2271 | NILP (ok_if_already_exists) ? Qnil : Qt); |
ae0d7250 | 2272 | else if (!NILP (Ffile_directory_p (file))) |
8719abec CY |
2273 | call4 (Qcopy_directory, file, newname, Qt, Qnil); |
2274 | else | |
2275 | /* We have already prompted if it was an integer, so don't | |
2276 | have copy-file prompt again. */ | |
586702ce | 2277 | Fcopy_file (file, newname, |
586702ce | 2278 | NILP (ok_if_already_exists) ? Qnil : Qt, |
574c05e2 | 2279 | Qt, Qt, Qt); |
d550c425 | 2280 | |
6bddfc97 | 2281 | count = SPECPDL_INDEX (); |
d2b66acf | 2282 | specbind (Qdelete_by_moving_to_trash, Qnil); |
8fab2362 | 2283 | |
ae0d7250 | 2284 | if (!NILP (Ffile_directory_p (file)) && NILP (symlink_target)) |
8719abec CY |
2285 | call2 (Qdelete_directory, file, Qt); |
2286 | else | |
f1a5d776 | 2287 | Fdelete_file (file, Qnil); |
6bddfc97 | 2288 | unbind_to (count, Qnil); |
570d7624 JB |
2289 | } |
2290 | else | |
a9f2aeae | 2291 | report_file_error ("Renaming", list2 (file, newname)); |
570d7624 JB |
2292 | } |
2293 | UNGCPRO; | |
2294 | return Qnil; | |
2295 | } | |
2296 | ||
2297 | DEFUN ("add-name-to-file", Fadd_name_to_file, Sadd_name_to_file, 2, 3, | |
7c0f6118 | 2298 | "fAdd name to file: \nGName to add to %s: \np", |
a4e03fe5 | 2299 | doc: /* Give FILE additional name NEWNAME. Both args must be strings. |
8c1a1077 PJ |
2300 | Signals a `file-already-exists' error if a file NEWNAME already exists |
2301 | unless optional third argument OK-IF-ALREADY-EXISTS is non-nil. | |
2302 | A number as third arg means request confirmation if NEWNAME already exists. | |
2303 | This is what happens in interactive use with M-x. */) | |
5842a27b | 2304 | (Lisp_Object file, Lisp_Object newname, Lisp_Object ok_if_already_exists) |
570d7624 | 2305 | { |
32f4334d | 2306 | Lisp_Object handler; |
b1d1b865 RS |
2307 | Lisp_Object encoded_file, encoded_newname; |
2308 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; | |
570d7624 | 2309 | |
b1d1b865 RS |
2310 | GCPRO4 (file, newname, encoded_file, encoded_newname); |
2311 | encoded_file = encoded_newname = Qnil; | |
b7826503 PJ |
2312 | CHECK_STRING (file); |
2313 | CHECK_STRING (newname); | |
3b7f6e60 | 2314 | file = Fexpand_file_name (file, Qnil); |
1ffc5c90 RS |
2315 | |
2316 | if (!NILP (Ffile_directory_p (newname))) | |
2317 | newname = Fexpand_file_name (Ffile_name_nondirectory (file), newname); | |
2318 | else | |
2319 | newname = Fexpand_file_name (newname, Qnil); | |
32f4334d RS |
2320 | |
2321 | /* If the file name has special constructs in it, | |
2322 | call the corresponding file handler. */ | |
3b7f6e60 | 2323 | handler = Ffind_file_name_handler (file, Qadd_name_to_file); |
32f4334d | 2324 | if (!NILP (handler)) |
3b7f6e60 | 2325 | RETURN_UNGCPRO (call4 (handler, Qadd_name_to_file, file, |
36712b0a | 2326 | newname, ok_if_already_exists)); |
32f4334d | 2327 | |
adc6741c RS |
2328 | /* If the new name has special constructs in it, |
2329 | call the corresponding file handler. */ | |
2330 | handler = Ffind_file_name_handler (newname, Qadd_name_to_file); | |
2331 | if (!NILP (handler)) | |
3b7f6e60 | 2332 | RETURN_UNGCPRO (call4 (handler, Qadd_name_to_file, file, |
adc6741c RS |
2333 | newname, ok_if_already_exists)); |
2334 | ||
b1d1b865 RS |
2335 | encoded_file = ENCODE_FILE (file); |
2336 | encoded_newname = ENCODE_FILE (newname); | |
2337 | ||
265a9e55 | 2338 | if (NILP (ok_if_already_exists) |
93c30b5f | 2339 | || INTEGERP (ok_if_already_exists)) |
2f868094 | 2340 | barf_or_query_if_file_exists (newname, "make it a new name", |
b8b29dc9 | 2341 | INTEGERP (ok_if_already_exists), 0, 0); |
5e570b75 | 2342 | |
42a5b22f PE |
2343 | unlink (SSDATA (newname)); |
2344 | if (0 > link (SSDATA (encoded_file), SSDATA (encoded_newname))) | |
a9f2aeae | 2345 | report_file_error ("Adding new name", list2 (file, newname)); |
570d7624 JB |
2346 | |
2347 | UNGCPRO; | |
2348 | return Qnil; | |
2349 | } | |
2350 | ||
570d7624 | 2351 | DEFUN ("make-symbolic-link", Fmake_symbolic_link, Smake_symbolic_link, 2, 3, |
7c0f6118 | 2352 | "FMake symbolic link to file: \nGMake symbolic link to file %s: \np", |
68780e2a RS |
2353 | doc: /* Make a symbolic link to FILENAME, named LINKNAME. |
2354 | Both args must be strings. | |
8c1a1077 PJ |
2355 | Signals a `file-already-exists' error if a file LINKNAME already exists |
2356 | unless optional third argument OK-IF-ALREADY-EXISTS is non-nil. | |
2357 | A number as third arg means request confirmation if LINKNAME already exists. | |
2358 | This happens for interactive use with M-x. */) | |
5842a27b | 2359 | (Lisp_Object filename, Lisp_Object linkname, Lisp_Object ok_if_already_exists) |
570d7624 | 2360 | { |
32f4334d | 2361 | Lisp_Object handler; |
b1d1b865 RS |
2362 | Lisp_Object encoded_filename, encoded_linkname; |
2363 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; | |
570d7624 | 2364 | |
b1d1b865 RS |
2365 | GCPRO4 (filename, linkname, encoded_filename, encoded_linkname); |
2366 | encoded_filename = encoded_linkname = Qnil; | |
b7826503 PJ |
2367 | CHECK_STRING (filename); |
2368 | CHECK_STRING (linkname); | |
d9bc1c99 RS |
2369 | /* If the link target has a ~, we must expand it to get |
2370 | a truly valid file name. Otherwise, do not expand; | |
2371 | we want to permit links to relative file names. */ | |
d5db4077 | 2372 | if (SREF (filename, 0) == '~') |
d9bc1c99 | 2373 | filename = Fexpand_file_name (filename, Qnil); |
1ffc5c90 RS |
2374 | |
2375 | if (!NILP (Ffile_directory_p (linkname))) | |
dac24db4 | 2376 | linkname = Fexpand_file_name (Ffile_name_nondirectory (filename), linkname); |
1ffc5c90 RS |
2377 | else |
2378 | linkname = Fexpand_file_name (linkname, Qnil); | |
32f4334d RS |
2379 | |
2380 | /* If the file name has special constructs in it, | |
2381 | call the corresponding file handler. */ | |
49307295 | 2382 | handler = Ffind_file_name_handler (filename, Qmake_symbolic_link); |
32f4334d | 2383 | if (!NILP (handler)) |
36712b0a KH |
2384 | RETURN_UNGCPRO (call4 (handler, Qmake_symbolic_link, filename, |
2385 | linkname, ok_if_already_exists)); | |
32f4334d | 2386 | |
adc6741c RS |
2387 | /* If the new link name has special constructs in it, |
2388 | call the corresponding file handler. */ | |
2389 | handler = Ffind_file_name_handler (linkname, Qmake_symbolic_link); | |
2390 | if (!NILP (handler)) | |
2391 | RETURN_UNGCPRO (call4 (handler, Qmake_symbolic_link, filename, | |
2392 | linkname, ok_if_already_exists)); | |
2393 | ||
b1d1b865 RS |
2394 | encoded_filename = ENCODE_FILE (filename); |
2395 | encoded_linkname = ENCODE_FILE (linkname); | |
2396 | ||
265a9e55 | 2397 | if (NILP (ok_if_already_exists) |
93c30b5f | 2398 | || INTEGERP (ok_if_already_exists)) |
2f868094 | 2399 | barf_or_query_if_file_exists (linkname, "make it a link", |
b8b29dc9 | 2400 | INTEGERP (ok_if_already_exists), 0, 0); |
42a5b22f PE |
2401 | if (0 > symlink (SSDATA (encoded_filename), |
2402 | SSDATA (encoded_linkname))) | |
570d7624 JB |
2403 | { |
2404 | /* If we didn't complain already, silently delete existing file. */ | |
2405 | if (errno == EEXIST) | |
2406 | { | |
42a5b22f PE |
2407 | unlink (SSDATA (encoded_linkname)); |
2408 | if (0 <= symlink (SSDATA (encoded_filename), | |
2409 | SSDATA (encoded_linkname))) | |
1a04498e KH |
2410 | { |
2411 | UNGCPRO; | |
2412 | return Qnil; | |
2413 | } | |
570d7624 | 2414 | } |
d9d0d182 PE |
2415 | if (errno == ENOSYS) |
2416 | { | |
2417 | UNGCPRO; | |
2418 | xsignal1 (Qfile_error, | |
2419 | build_string ("Symbolic links are not supported")); | |
2420 | } | |
570d7624 | 2421 | |
a9f2aeae | 2422 | report_file_error ("Making symbolic link", list2 (filename, linkname)); |
570d7624 JB |
2423 | } |
2424 | UNGCPRO; | |
2425 | return Qnil; | |
e89b536d | 2426 | } |
570d7624 | 2427 | |
570d7624 | 2428 | \f |
a7ca3326 | 2429 | DEFUN ("file-name-absolute-p", Ffile_name_absolute_p, Sfile_name_absolute_p, |
570d7624 | 2430 | 1, 1, 0, |
8c1a1077 PJ |
2431 | doc: /* Return t if file FILENAME specifies an absolute file name. |
2432 | On Unix, this is a name starting with a `/' or a `~'. */) | |
5842a27b | 2433 | (Lisp_Object filename) |
570d7624 | 2434 | { |
b7826503 | 2435 | CHECK_STRING (filename); |
5976c3fe | 2436 | return file_name_absolute_p (SSDATA (filename)) ? Qt : Qnil; |
570d7624 | 2437 | } |
3beeedfe RS |
2438 | \f |
2439 | /* Return nonzero if file FILENAME exists and can be executed. */ | |
2440 | ||
2441 | static int | |
971de7fb | 2442 | check_executable (char *filename) |
3beeedfe | 2443 | { |
3be3c08e | 2444 | #ifdef DOS_NT |
3be3c08e RS |
2445 | struct stat st; |
2446 | if (stat (filename, &st) < 0) | |
2447 | return 0; | |
199607e4 | 2448 | return ((st.st_mode & S_IEXEC) != 0); |
3be3c08e | 2449 | #else /* not DOS_NT */ |
de0be7dd RS |
2450 | #ifdef HAVE_EUIDACCESS |
2451 | return (euidaccess (filename, 1) >= 0); | |
3beeedfe RS |
2452 | #else |
2453 | /* Access isn't quite right because it uses the real uid | |
2454 | and we really want to test with the effective uid. | |
2455 | But Unix doesn't give us a right way to do it. */ | |
2456 | return (access (filename, 1) >= 0); | |
2457 | #endif | |
3be3c08e | 2458 | #endif /* not DOS_NT */ |
3beeedfe RS |
2459 | } |
2460 | ||
2461 | /* Return nonzero if file FILENAME exists and can be written. */ | |
2462 | ||
2463 | static int | |
8ea90aa3 | 2464 | check_writable (const char *filename) |
3beeedfe | 2465 | { |
3be3c08e RS |
2466 | #ifdef MSDOS |
2467 | struct stat st; | |
2468 | if (stat (filename, &st) < 0) | |
2469 | return 0; | |
f68c809d | 2470 | return (st.st_mode & S_IWRITE || S_ISDIR (st.st_mode)); |
3be3c08e | 2471 | #else /* not MSDOS */ |
41f3fb38 | 2472 | #ifdef HAVE_EUIDACCESS |
e1b01a3a KB |
2473 | int res = (euidaccess (filename, 2) >= 0); |
2474 | #ifdef CYGWIN | |
2475 | /* euidaccess may have returned failure because Cygwin couldn't | |
2476 | determine the file's UID or GID; if so, we return success. */ | |
2477 | if (!res) | |
2478 | { | |
2479 | struct stat st; | |
2480 | if (stat (filename, &st) < 0) | |
2481 | return 0; | |
2482 | res = (st.st_uid == -1 || st.st_gid == -1); | |
2483 | } | |
2484 | #endif /* CYGWIN */ | |
2485 | return res; | |
2486 | #else /* not HAVE_EUIDACCESS */ | |
3beeedfe RS |
2487 | /* Access isn't quite right because it uses the real uid |
2488 | and we really want to test with the effective uid. | |
2489 | But Unix doesn't give us a right way to do it. | |
2490 | Opening with O_WRONLY could work for an ordinary file, | |
2491 | but would lose for directories. */ | |
2492 | return (access (filename, 2) >= 0); | |
e1b01a3a | 2493 | #endif /* not HAVE_EUIDACCESS */ |
3be3c08e | 2494 | #endif /* not MSDOS */ |
3beeedfe | 2495 | } |
570d7624 | 2496 | |
a7ca3326 | 2497 | DEFUN ("file-exists-p", Ffile_exists_p, Sfile_exists_p, 1, 1, 0, |
68780e2a RS |
2498 | doc: /* Return t if file FILENAME exists (whether or not you can read it.) |
2499 | See also `file-readable-p' and `file-attributes'. | |
2500 | This returns nil for a symlink to a nonexistent file. | |
2501 | Use `file-symlink-p' to test for such links. */) | |
5842a27b | 2502 | (Lisp_Object filename) |
570d7624 | 2503 | { |
199607e4 | 2504 | Lisp_Object absname; |
32f4334d | 2505 | Lisp_Object handler; |
4018b5ef | 2506 | struct stat statbuf; |
570d7624 | 2507 | |
b7826503 | 2508 | CHECK_STRING (filename); |
199607e4 | 2509 | absname = Fexpand_file_name (filename, Qnil); |
32f4334d RS |
2510 | |
2511 | /* If the file name has special constructs in it, | |
2512 | call the corresponding file handler. */ | |
199607e4 | 2513 | handler = Ffind_file_name_handler (absname, Qfile_exists_p); |
32f4334d | 2514 | if (!NILP (handler)) |
199607e4 | 2515 | return call2 (handler, Qfile_exists_p, absname); |
32f4334d | 2516 | |
b1d1b865 RS |
2517 | absname = ENCODE_FILE (absname); |
2518 | ||
42a5b22f | 2519 | return (stat (SSDATA (absname), &statbuf) >= 0) ? Qt : Qnil; |
570d7624 JB |
2520 | } |
2521 | ||
2522 | DEFUN ("file-executable-p", Ffile_executable_p, Sfile_executable_p, 1, 1, 0, | |
8c1a1077 PJ |
2523 | doc: /* Return t if FILENAME can be executed by you. |
2524 | For a directory, this means you can access files in that directory. */) | |
5842a27b | 2525 | (Lisp_Object filename) |
570d7624 | 2526 | { |
199607e4 | 2527 | Lisp_Object absname; |
32f4334d | 2528 | Lisp_Object handler; |
570d7624 | 2529 | |
b7826503 | 2530 | CHECK_STRING (filename); |
199607e4 | 2531 | absname = Fexpand_file_name (filename, Qnil); |
32f4334d RS |
2532 | |
2533 | /* If the file name has special constructs in it, | |
2534 | call the corresponding file handler. */ | |
199607e4 | 2535 | handler = Ffind_file_name_handler (absname, Qfile_executable_p); |
32f4334d | 2536 | if (!NILP (handler)) |
199607e4 | 2537 | return call2 (handler, Qfile_executable_p, absname); |
32f4334d | 2538 | |
b1d1b865 RS |
2539 | absname = ENCODE_FILE (absname); |
2540 | ||
42a5b22f | 2541 | return (check_executable (SSDATA (absname)) ? Qt : Qnil); |
570d7624 JB |
2542 | } |
2543 | ||
a7ca3326 | 2544 | DEFUN ("file-readable-p", Ffile_readable_p, Sfile_readable_p, 1, 1, 0, |
8c1a1077 PJ |
2545 | doc: /* Return t if file FILENAME exists and you can read it. |
2546 | See also `file-exists-p' and `file-attributes'. */) | |
5842a27b | 2547 | (Lisp_Object filename) |
570d7624 | 2548 | { |
199607e4 | 2549 | Lisp_Object absname; |
32f4334d | 2550 | Lisp_Object handler; |
4018b5ef | 2551 | int desc; |
bb369dc6 RS |
2552 | int flags; |
2553 | struct stat statbuf; | |
570d7624 | 2554 | |
b7826503 | 2555 | CHECK_STRING (filename); |
199607e4 | 2556 | absname = Fexpand_file_name (filename, Qnil); |
32f4334d RS |
2557 | |
2558 | /* If the file name has special constructs in it, | |
2559 | call the corresponding file handler. */ | |
199607e4 | 2560 | handler = Ffind_file_name_handler (absname, Qfile_readable_p); |
32f4334d | 2561 | if (!NILP (handler)) |
199607e4 | 2562 | return call2 (handler, Qfile_readable_p, absname); |
32f4334d | 2563 | |
b1d1b865 RS |
2564 | absname = ENCODE_FILE (absname); |
2565 | ||
5e617bc2 | 2566 | #if defined (DOS_NT) || defined (macintosh) |
fb4c6c96 AC |
2567 | /* Under MS-DOS, Windows, and Macintosh, open does not work for |
2568 | directories. */ | |
d5db4077 | 2569 | if (access (SDATA (absname), 0) == 0) |
a8a7d065 RS |
2570 | return Qt; |
2571 | return Qnil; | |
fb4c6c96 | 2572 | #else /* not DOS_NT and not macintosh */ |
bb369dc6 | 2573 | flags = O_RDONLY; |
ae0d7250 | 2574 | #ifdef O_NONBLOCK |
bb369dc6 RS |
2575 | /* Opening a fifo without O_NONBLOCK can wait. |
2576 | We don't want to wait. But we don't want to mess wth O_NONBLOCK | |
2577 | except in the case of a fifo, on a system which handles it. */ | |
42a5b22f | 2578 | desc = stat (SSDATA (absname), &statbuf); |
bb369dc6 RS |
2579 | if (desc < 0) |
2580 | return Qnil; | |
2581 | if (S_ISFIFO (statbuf.st_mode)) | |
2582 | flags |= O_NONBLOCK; | |
2583 | #endif | |
42a5b22f | 2584 | desc = emacs_open (SSDATA (absname), flags, 0); |
4018b5ef RS |
2585 | if (desc < 0) |
2586 | return Qnil; | |
68c45bf0 | 2587 | emacs_close (desc); |
4018b5ef | 2588 | return Qt; |
fb4c6c96 | 2589 | #endif /* not DOS_NT and not macintosh */ |
570d7624 JB |
2590 | } |
2591 | ||
f793dc6c RS |
2592 | /* Having this before file-symlink-p mysteriously caused it to be forgotten |
2593 | on the RT/PC. */ | |
2594 | DEFUN ("file-writable-p", Ffile_writable_p, Sfile_writable_p, 1, 1, 0, | |
8c1a1077 | 2595 | doc: /* Return t if file FILENAME can be written or created by you. */) |
5842a27b | 2596 | (Lisp_Object filename) |
f793dc6c | 2597 | { |
b1d1b865 | 2598 | Lisp_Object absname, dir, encoded; |
f793dc6c RS |
2599 | Lisp_Object handler; |
2600 | struct stat statbuf; | |
2601 | ||
b7826503 | 2602 | CHECK_STRING (filename); |
199607e4 | 2603 | absname = Fexpand_file_name (filename, Qnil); |
f793dc6c RS |
2604 | |
2605 | /* If the file name has special constructs in it, | |
2606 | call the corresponding file handler. */ | |
199607e4 | 2607 | handler = Ffind_file_name_handler (absname, Qfile_writable_p); |
f793dc6c | 2608 | if (!NILP (handler)) |
199607e4 | 2609 | return call2 (handler, Qfile_writable_p, absname); |
f793dc6c | 2610 | |
b1d1b865 | 2611 | encoded = ENCODE_FILE (absname); |
42a5b22f PE |
2612 | if (stat (SSDATA (encoded), &statbuf) >= 0) |
2613 | return (check_writable (SSDATA (encoded)) | |
f793dc6c | 2614 | ? Qt : Qnil); |
b1d1b865 | 2615 | |
199607e4 | 2616 | dir = Ffile_name_directory (absname); |
f793dc6c RS |
2617 | #ifdef MSDOS |
2618 | if (!NILP (dir)) | |
2619 | dir = Fdirectory_file_name (dir); | |
2620 | #endif /* MSDOS */ | |
b1d1b865 RS |
2621 | |
2622 | dir = ENCODE_FILE (dir); | |
e3e8a75a GM |
2623 | #ifdef WINDOWSNT |
2624 | /* The read-only attribute of the parent directory doesn't affect | |
2625 | whether a file or directory can be created within it. Some day we | |
2626 | should check ACLs though, which do affect this. */ | |
d5db4077 | 2627 | if (stat (SDATA (dir), &statbuf) < 0) |
e3e8a75a | 2628 | return Qnil; |
f68c809d | 2629 | return S_ISDIR (statbuf.st_mode) ? Qt : Qnil; |
e3e8a75a | 2630 | #else |
51b59d79 | 2631 | return (check_writable (!NILP (dir) ? SSDATA (dir) : "") |
f793dc6c | 2632 | ? Qt : Qnil); |
e3e8a75a | 2633 | #endif |
f793dc6c RS |
2634 | } |
2635 | \f | |
1f8653eb | 2636 | DEFUN ("access-file", Faccess_file, Saccess_file, 2, 2, 0, |
8c1a1077 PJ |
2637 | doc: /* Access file FILENAME, and get an error if that does not work. |
2638 | The second argument STRING is used in the error message. | |
a4e03fe5 | 2639 | If there is no error, returns nil. */) |
5842a27b | 2640 | (Lisp_Object filename, Lisp_Object string) |
1f8653eb | 2641 | { |
49475635 | 2642 | Lisp_Object handler, encoded_filename, absname; |
1f8653eb RS |
2643 | int fd; |
2644 | ||
b7826503 | 2645 | CHECK_STRING (filename); |
49475635 EZ |
2646 | absname = Fexpand_file_name (filename, Qnil); |
2647 | ||
b7826503 | 2648 | CHECK_STRING (string); |
1f8653eb RS |
2649 | |
2650 | /* If the file name has special constructs in it, | |
2651 | call the corresponding file handler. */ | |
49475635 | 2652 | handler = Ffind_file_name_handler (absname, Qaccess_file); |
1f8653eb | 2653 | if (!NILP (handler)) |
49475635 | 2654 | return call3 (handler, Qaccess_file, absname, string); |
1f8653eb | 2655 | |
49475635 | 2656 | encoded_filename = ENCODE_FILE (absname); |
b1d1b865 | 2657 | |
42a5b22f | 2658 | fd = emacs_open (SSDATA (encoded_filename), O_RDONLY, 0); |
1f8653eb | 2659 | if (fd < 0) |
42a5b22f | 2660 | report_file_error (SSDATA (string), Fcons (filename, Qnil)); |
68c45bf0 | 2661 | emacs_close (fd); |
1f8653eb RS |
2662 | |
2663 | return Qnil; | |
2664 | } | |
2665 | \f | |
a7ca3326 | 2666 | DEFUN ("file-symlink-p", Ffile_symlink_p, Sfile_symlink_p, 1, 1, 0, |
8c1a1077 | 2667 | doc: /* Return non-nil if file FILENAME is the name of a symbolic link. |
1c353c74 | 2668 | The value is the link target, as a string. |
68780e2a RS |
2669 | Otherwise it returns nil. |
2670 | ||
2671 | This function returns t when given the name of a symlink that | |
2672 | points to a nonexistent file. */) | |
5842a27b | 2673 | (Lisp_Object filename) |
570d7624 | 2674 | { |
32f4334d | 2675 | Lisp_Object handler; |
ae0d7250 | 2676 | char *buf; |
ae0d7250 | 2677 | Lisp_Object val; |
d1fdcab7 | 2678 | char readlink_buf[READLINK_BUFSIZE]; |
570d7624 | 2679 | |
b7826503 | 2680 | CHECK_STRING (filename); |
570d7624 JB |
2681 | filename = Fexpand_file_name (filename, Qnil); |
2682 | ||
32f4334d RS |
2683 | /* If the file name has special constructs in it, |
2684 | call the corresponding file handler. */ | |
49307295 | 2685 | handler = Ffind_file_name_handler (filename, Qfile_symlink_p); |
32f4334d RS |
2686 | if (!NILP (handler)) |
2687 | return call2 (handler, Qfile_symlink_p, filename); | |
2688 | ||
b1d1b865 RS |
2689 | filename = ENCODE_FILE (filename); |
2690 | ||
d1fdcab7 PE |
2691 | buf = emacs_readlink (SSDATA (filename), readlink_buf); |
2692 | if (! buf) | |
2693 | return Qnil; | |
efdc16c9 | 2694 | |
d1fdcab7 | 2695 | val = build_string (buf); |
8966b757 | 2696 | if (buf[0] == '/' && strchr (buf, ':')) |
69ac1891 | 2697 | val = concat2 (build_string ("/:"), val); |
d1fdcab7 PE |
2698 | if (buf != readlink_buf) |
2699 | xfree (buf); | |
cd913586 KH |
2700 | val = DECODE_FILE (val); |
2701 | return val; | |
570d7624 JB |
2702 | } |
2703 | ||
a7ca3326 | 2704 | DEFUN ("file-directory-p", Ffile_directory_p, Sfile_directory_p, 1, 1, 0, |
8c1a1077 PJ |
2705 | doc: /* Return t if FILENAME names an existing directory. |
2706 | Symbolic links to directories count as directories. | |
2707 | See `file-symlink-p' to distinguish symlinks. */) | |
5842a27b | 2708 | (Lisp_Object filename) |
570d7624 | 2709 | { |
199607e4 | 2710 | register Lisp_Object absname; |
570d7624 | 2711 | struct stat st; |
32f4334d | 2712 | Lisp_Object handler; |
570d7624 | 2713 | |
4b4deea2 | 2714 | absname = expand_and_dir_to_file (filename, BVAR (current_buffer, directory)); |
570d7624 | 2715 | |
32f4334d RS |
2716 | /* If the file name has special constructs in it, |
2717 | call the corresponding file handler. */ | |
199607e4 | 2718 | handler = Ffind_file_name_handler (absname, Qfile_directory_p); |
32f4334d | 2719 | if (!NILP (handler)) |
199607e4 | 2720 | return call2 (handler, Qfile_directory_p, absname); |
32f4334d | 2721 | |
b1d1b865 RS |
2722 | absname = ENCODE_FILE (absname); |
2723 | ||
42a5b22f | 2724 | if (stat (SSDATA (absname), &st) < 0) |
570d7624 | 2725 | return Qnil; |
f68c809d | 2726 | return S_ISDIR (st.st_mode) ? Qt : Qnil; |
570d7624 JB |
2727 | } |
2728 | ||
a7ca3326 | 2729 | DEFUN ("file-accessible-directory-p", Ffile_accessible_directory_p, |
16a97296 | 2730 | Sfile_accessible_directory_p, 1, 1, 0, |
e385ec41 RS |
2731 | doc: /* Return t if file FILENAME names a directory you can open. |
2732 | For the value to be t, FILENAME must specify the name of a directory as a file, | |
2733 | and the directory must allow you to open files in it. In order to use a | |
8c1a1077 PJ |
2734 | directory as a buffer's current directory, this predicate must return true. |
2735 | A directory name spec may be given instead; then the value is t | |
2736 | if the directory so specified exists and really is a readable and | |
2737 | searchable directory. */) | |
5842a27b | 2738 | (Lisp_Object filename) |
b72dea2a | 2739 | { |
32f4334d | 2740 | Lisp_Object handler; |
1a04498e | 2741 | int tem; |
d26859eb | 2742 | struct gcpro gcpro1; |
32f4334d RS |
2743 | |
2744 | /* If the file name has special constructs in it, | |
2745 | call the corresponding file handler. */ | |
49307295 | 2746 | handler = Ffind_file_name_handler (filename, Qfile_accessible_directory_p); |
32f4334d RS |
2747 | if (!NILP (handler)) |
2748 | return call2 (handler, Qfile_accessible_directory_p, filename); | |
2749 | ||
d26859eb | 2750 | GCPRO1 (filename); |
1a04498e KH |
2751 | tem = (NILP (Ffile_directory_p (filename)) |
2752 | || NILP (Ffile_executable_p (filename))); | |
d26859eb | 2753 | UNGCPRO; |
1a04498e | 2754 | return tem ? Qnil : Qt; |
b72dea2a JB |
2755 | } |
2756 | ||
f793dc6c | 2757 | DEFUN ("file-regular-p", Ffile_regular_p, Sfile_regular_p, 1, 1, 0, |
19a9c3b7 LH |
2758 | doc: /* Return t if FILENAME names a regular file. |
2759 | This is the sort of file that holds an ordinary stream of data bytes. | |
2760 | Symbolic links to regular files count as regular files. | |
2761 | See `file-symlink-p' to distinguish symlinks. */) | |
5842a27b | 2762 | (Lisp_Object filename) |
f793dc6c | 2763 | { |
199607e4 | 2764 | register Lisp_Object absname; |
f793dc6c RS |
2765 | struct stat st; |
2766 | Lisp_Object handler; | |
2767 | ||
4b4deea2 | 2768 | absname = expand_and_dir_to_file (filename, BVAR (current_buffer, directory)); |
f793dc6c RS |
2769 | |
2770 | /* If the file name has special constructs in it, | |
2771 | call the corresponding file handler. */ | |
199607e4 | 2772 | handler = Ffind_file_name_handler (absname, Qfile_regular_p); |
f793dc6c | 2773 | if (!NILP (handler)) |
199607e4 | 2774 | return call2 (handler, Qfile_regular_p, absname); |
f793dc6c | 2775 | |
b1d1b865 RS |
2776 | absname = ENCODE_FILE (absname); |
2777 | ||
c1c4693e RS |
2778 | #ifdef WINDOWSNT |
2779 | { | |
2780 | int result; | |
2781 | Lisp_Object tem = Vw32_get_true_file_attributes; | |
2782 | ||
2783 | /* Tell stat to use expensive method to get accurate info. */ | |
2784 | Vw32_get_true_file_attributes = Qt; | |
d5db4077 | 2785 | result = stat (SDATA (absname), &st); |
c1c4693e RS |
2786 | Vw32_get_true_file_attributes = tem; |
2787 | ||
2788 | if (result < 0) | |
2789 | return Qnil; | |
f68c809d | 2790 | return S_ISREG (st.st_mode) ? Qt : Qnil; |
c1c4693e RS |
2791 | } |
2792 | #else | |
42a5b22f | 2793 | if (stat (SSDATA (absname), &st) < 0) |
f793dc6c | 2794 | return Qnil; |
f68c809d | 2795 | return S_ISREG (st.st_mode) ? Qt : Qnil; |
c1c4693e | 2796 | #endif |
f793dc6c RS |
2797 | } |
2798 | \f | |
574c05e2 KK |
2799 | DEFUN ("file-selinux-context", Ffile_selinux_context, |
2800 | Sfile_selinux_context, 1, 1, 0, | |
fa74b241 CY |
2801 | doc: /* Return SELinux context of file named FILENAME. |
2802 | The return value is a list (USER ROLE TYPE RANGE), where the list | |
2803 | elements are strings naming the user, role, type, and range of the | |
2804 | file's SELinux security context. | |
2805 | ||
2806 | Return (nil nil nil nil) if the file is nonexistent or inaccessible, | |
2807 | or if SELinux is disabled, or if Emacs lacks SELinux support. */) | |
5842a27b | 2808 | (Lisp_Object filename) |
574c05e2 KK |
2809 | { |
2810 | Lisp_Object absname; | |
2811 | Lisp_Object values[4]; | |
2812 | Lisp_Object handler; | |
2813 | #if HAVE_LIBSELINUX | |
2814 | security_context_t con; | |
2815 | int conlength; | |
2816 | context_t context; | |
2817 | #endif | |
2818 | ||
4b4deea2 | 2819 | absname = expand_and_dir_to_file (filename, BVAR (current_buffer, directory)); |
574c05e2 KK |
2820 | |
2821 | /* If the file name has special constructs in it, | |
2822 | call the corresponding file handler. */ | |
2823 | handler = Ffind_file_name_handler (absname, Qfile_selinux_context); | |
2824 | if (!NILP (handler)) | |
2825 | return call2 (handler, Qfile_selinux_context, absname); | |
2826 | ||
2827 | absname = ENCODE_FILE (absname); | |
2828 | ||
2829 | values[0] = Qnil; | |
2830 | values[1] = Qnil; | |
2831 | values[2] = Qnil; | |
2832 | values[3] = Qnil; | |
2833 | #if HAVE_LIBSELINUX | |
2834 | if (is_selinux_enabled ()) | |
2835 | { | |
b14aac08 | 2836 | conlength = lgetfilecon (SSDATA (absname), &con); |
574c05e2 KK |
2837 | if (conlength > 0) |
2838 | { | |
2839 | context = context_new (con); | |
45841e65 KK |
2840 | if (context_user_get (context)) |
2841 | values[0] = build_string (context_user_get (context)); | |
2842 | if (context_role_get (context)) | |
2843 | values[1] = build_string (context_role_get (context)); | |
2844 | if (context_type_get (context)) | |
2845 | values[2] = build_string (context_type_get (context)); | |
2846 | if (context_range_get (context)) | |
2847 | values[3] = build_string (context_range_get (context)); | |
574c05e2 KK |
2848 | context_free (context); |
2849 | } | |
2850 | if (con) | |
2851 | freecon (con); | |
2852 | } | |
2853 | #endif | |
2854 | ||
5e617bc2 | 2855 | return Flist (sizeof (values) / sizeof (values[0]), values); |
574c05e2 KK |
2856 | } |
2857 | \f | |
2858 | DEFUN ("set-file-selinux-context", Fset_file_selinux_context, | |
2859 | Sset_file_selinux_context, 2, 2, 0, | |
fa74b241 CY |
2860 | doc: /* Set SELinux context of file named FILENAME to CONTEXT. |
2861 | CONTEXT should be a list (USER ROLE TYPE RANGE), where the list | |
2862 | elements are strings naming the components of a SELinux context. | |
2863 | ||
2864 | This function does nothing if SELinux is disabled, or if Emacs was not | |
2865 | compiled with SELinux support. */) | |
5842a27b | 2866 | (Lisp_Object filename, Lisp_Object context) |
574c05e2 | 2867 | { |
0f4a96b5 | 2868 | Lisp_Object absname; |
574c05e2 | 2869 | Lisp_Object handler; |
0f4a96b5 JB |
2870 | #if HAVE_LIBSELINUX |
2871 | Lisp_Object encoded_absname; | |
574c05e2 KK |
2872 | Lisp_Object user = CAR_SAFE (context); |
2873 | Lisp_Object role = CAR_SAFE (CDR_SAFE (context)); | |
2874 | Lisp_Object type = CAR_SAFE (CDR_SAFE (CDR_SAFE (context))); | |
2875 | Lisp_Object range = CAR_SAFE (CDR_SAFE (CDR_SAFE (CDR_SAFE (context)))); | |
574c05e2 KK |
2876 | security_context_t con; |
2877 | int fail, conlength; | |
2878 | context_t parsed_con; | |
2879 | #endif | |
2880 | ||
4b4deea2 | 2881 | absname = Fexpand_file_name (filename, BVAR (current_buffer, directory)); |
574c05e2 KK |
2882 | |
2883 | /* If the file name has special constructs in it, | |
2884 | call the corresponding file handler. */ | |
2885 | handler = Ffind_file_name_handler (absname, Qset_file_selinux_context); | |
2886 | if (!NILP (handler)) | |
2887 | return call3 (handler, Qset_file_selinux_context, absname, context); | |
2888 | ||
0f4a96b5 | 2889 | #if HAVE_LIBSELINUX |
574c05e2 KK |
2890 | if (is_selinux_enabled ()) |
2891 | { | |
2892 | /* Get current file context. */ | |
a9b53ad3 | 2893 | encoded_absname = ENCODE_FILE (absname); |
b14aac08 | 2894 | conlength = lgetfilecon (SSDATA (encoded_absname), &con); |
574c05e2 KK |
2895 | if (conlength > 0) |
2896 | { | |
2897 | parsed_con = context_new (con); | |
2898 | /* Change the parts defined in the parameter.*/ | |
2899 | if (STRINGP (user)) | |
2900 | { | |
b14aac08 | 2901 | if (context_user_set (parsed_con, SSDATA (user))) |
574c05e2 KK |
2902 | error ("Doing context_user_set"); |
2903 | } | |
2904 | if (STRINGP (role)) | |
2905 | { | |
b14aac08 | 2906 | if (context_role_set (parsed_con, SSDATA (role))) |
574c05e2 KK |
2907 | error ("Doing context_role_set"); |
2908 | } | |
2909 | if (STRINGP (type)) | |
2910 | { | |
b14aac08 | 2911 | if (context_type_set (parsed_con, SSDATA (type))) |
574c05e2 KK |
2912 | error ("Doing context_type_set"); |
2913 | } | |
2914 | if (STRINGP (range)) | |
2915 | { | |
b14aac08 | 2916 | if (context_range_set (parsed_con, SSDATA (range))) |
574c05e2 KK |
2917 | error ("Doing context_range_set"); |
2918 | } | |
2919 | ||
24c51a09 | 2920 | /* Set the modified context back to the file. */ |
b14aac08 PE |
2921 | fail = lsetfilecon (SSDATA (encoded_absname), |
2922 | context_str (parsed_con)); | |
24c51a09 GM |
2923 | /* See http://debbugs.gnu.org/11245 for ENOTSUP. */ |
2924 | if (fail && errno != ENOTSUP) | |
574c05e2 KK |
2925 | report_file_error ("Doing lsetfilecon", Fcons (absname, Qnil)); |
2926 | ||
2927 | context_free (parsed_con); | |
2928 | } | |
2929 | else | |
5e617bc2 | 2930 | report_file_error ("Doing lgetfilecon", Fcons (absname, Qnil)); |
574c05e2 KK |
2931 | |
2932 | if (con) | |
2933 | freecon (con); | |
2934 | } | |
2935 | #endif | |
2936 | ||
2937 | return Qnil; | |
2938 | } | |
2939 | \f | |
570d7624 | 2940 | DEFUN ("file-modes", Ffile_modes, Sfile_modes, 1, 1, 0, |
d4a42098 KS |
2941 | doc: /* Return mode bits of file named FILENAME, as an integer. |
2942 | Return nil, if file does not exist or is not accessible. */) | |
5842a27b | 2943 | (Lisp_Object filename) |
570d7624 | 2944 | { |
199607e4 | 2945 | Lisp_Object absname; |
570d7624 | 2946 | struct stat st; |
32f4334d | 2947 | Lisp_Object handler; |
570d7624 | 2948 | |
4b4deea2 | 2949 | absname = expand_and_dir_to_file (filename, BVAR (current_buffer, directory)); |
570d7624 | 2950 | |
32f4334d RS |
2951 | /* If the file name has special constructs in it, |
2952 | call the corresponding file handler. */ | |
199607e4 | 2953 | handler = Ffind_file_name_handler (absname, Qfile_modes); |
32f4334d | 2954 | if (!NILP (handler)) |
199607e4 | 2955 | return call2 (handler, Qfile_modes, absname); |
32f4334d | 2956 | |
b1d1b865 RS |
2957 | absname = ENCODE_FILE (absname); |
2958 | ||
42a5b22f | 2959 | if (stat (SSDATA (absname), &st) < 0) |
570d7624 | 2960 | return Qnil; |
3ace87e3 | 2961 | |
570d7624 JB |
2962 | return make_number (st.st_mode & 07777); |
2963 | } | |
2964 | ||
09fbdf6c MC |
2965 | DEFUN ("set-file-modes", Fset_file_modes, Sset_file_modes, 2, 2, |
2966 | "(let ((file (read-file-name \"File: \"))) \ | |
2967 | (list file (read-file-modes nil file)))", | |
8c1a1077 | 2968 | doc: /* Set mode bits of file named FILENAME to MODE (an integer). |
ea429250 EZ |
2969 | Only the 12 low bits of MODE are used. |
2970 | ||
2971 | Interactively, mode bits are read by `read-file-modes', which accepts | |
712adc82 | 2972 | symbolic notation, like the `chmod' command from GNU Coreutils. */) |
5842a27b | 2973 | (Lisp_Object filename, Lisp_Object mode) |
570d7624 | 2974 | { |
b1d1b865 | 2975 | Lisp_Object absname, encoded_absname; |
32f4334d | 2976 | Lisp_Object handler; |
570d7624 | 2977 | |
4b4deea2 | 2978 | absname = Fexpand_file_name (filename, BVAR (current_buffer, directory)); |
b7826503 | 2979 | CHECK_NUMBER (mode); |
570d7624 | 2980 | |
32f4334d RS |
2981 | /* If the file name has special constructs in it, |
2982 | call the corresponding file handler. */ | |
199607e4 | 2983 | handler = Ffind_file_name_handler (absname, Qset_file_modes); |
32f4334d | 2984 | if (!NILP (handler)) |
199607e4 | 2985 | return call3 (handler, Qset_file_modes, absname, mode); |
32f4334d | 2986 | |
b1d1b865 RS |
2987 | encoded_absname = ENCODE_FILE (absname); |
2988 | ||
18c52557 | 2989 | if (chmod (SSDATA (encoded_absname), XINT (mode) & 07777) < 0) |
199607e4 | 2990 | report_file_error ("Doing chmod", Fcons (absname, Qnil)); |
570d7624 JB |
2991 | |
2992 | return Qnil; | |
2993 | } | |
2994 | ||
c24e9a53 | 2995 | DEFUN ("set-default-file-modes", Fset_default_file_modes, Sset_default_file_modes, 1, 1, 0, |
8c1a1077 PJ |
2996 | doc: /* Set the file permission bits for newly created files. |
2997 | The argument MODE should be an integer; only the low 9 bits are used. | |
2998 | This setting is inherited by subprocesses. */) | |
5842a27b | 2999 | (Lisp_Object mode) |
36a8c287 | 3000 | { |
b7826503 | 3001 | CHECK_NUMBER (mode); |
199607e4 | 3002 | |
5f85ea58 | 3003 | umask ((~ XINT (mode)) & 0777); |
36a8c287 JB |
3004 | |
3005 | return Qnil; | |
3006 | } | |
3007 | ||
c24e9a53 | 3008 | DEFUN ("default-file-modes", Fdefault_file_modes, Sdefault_file_modes, 0, 0, 0, |
8c1a1077 PJ |
3009 | doc: /* Return the default file protection for created files. |
3010 | The value is an integer. */) | |
5842a27b | 3011 | (void) |
36a8c287 | 3012 | { |
5f85ea58 RS |
3013 | int realmask; |
3014 | Lisp_Object value; | |
36a8c287 | 3015 | |
f10deafb | 3016 | BLOCK_INPUT; |
5f85ea58 RS |
3017 | realmask = umask (0); |
3018 | umask (realmask); | |
f10deafb | 3019 | UNBLOCK_INPUT; |
36a8c287 | 3020 | |
46283abe | 3021 | XSETINT (value, (~ realmask) & 0777); |
5f85ea58 | 3022 | return value; |
36a8c287 | 3023 | } |
819da85b | 3024 | \f |
819da85b EZ |
3025 | |
3026 | DEFUN ("set-file-times", Fset_file_times, Sset_file_times, 1, 2, 0, | |
f839df0c | 3027 | doc: /* Set times of file FILENAME to TIMESTAMP. |
819da85b EZ |
3028 | Set both access and modification times. |
3029 | Return t on success, else nil. | |
f839df0c | 3030 | Use the current time if TIMESTAMP is nil. TIMESTAMP is in the format of |
819da85b | 3031 | `current-time'. */) |
f839df0c | 3032 | (Lisp_Object filename, Lisp_Object timestamp) |
819da85b EZ |
3033 | { |
3034 | Lisp_Object absname, encoded_absname; | |
3035 | Lisp_Object handler; | |
31571fd7 | 3036 | EMACS_TIME t = lisp_time_argument (timestamp); |
819da85b | 3037 | |
4b4deea2 | 3038 | absname = Fexpand_file_name (filename, BVAR (current_buffer, directory)); |
819da85b EZ |
3039 | |
3040 | /* If the file name has special constructs in it, | |
3041 | call the corresponding file handler. */ | |
3042 | handler = Ffind_file_name_handler (absname, Qset_file_times); | |
3043 | if (!NILP (handler)) | |
f839df0c | 3044 | return call3 (handler, Qset_file_times, absname, timestamp); |
819da85b EZ |
3045 | |
3046 | encoded_absname = ENCODE_FILE (absname); | |
5df5e07c | 3047 | |
819da85b | 3048 | { |
d35af63c | 3049 | if (set_file_times (-1, SSDATA (encoded_absname), t, t)) |
819da85b EZ |
3050 | { |
3051 | #ifdef DOS_NT | |
3052 | struct stat st; | |
3053 | ||
3054 | /* Setting times on a directory always fails. */ | |
f68c809d | 3055 | if (stat (SSDATA (encoded_absname), &st) == 0 && S_ISDIR (st.st_mode)) |
819da85b EZ |
3056 | return Qnil; |
3057 | #endif | |
3058 | report_file_error ("Setting file times", Fcons (absname, Qnil)); | |
3059 | return Qnil; | |
3060 | } | |
3061 | } | |
5df5e07c | 3062 | |
819da85b EZ |
3063 | return Qt; |
3064 | } | |
f793dc6c | 3065 | \f |
697c17a2 | 3066 | #ifdef HAVE_SYNC |
85ffea93 | 3067 | DEFUN ("unix-sync", Funix_sync, Sunix_sync, 0, 0, "", |
8c1a1077 | 3068 | doc: /* Tell Unix to finish all pending disk updates. */) |
5842a27b | 3069 | (void) |
85ffea93 RS |
3070 | { |
3071 | sync (); | |
3072 | return Qnil; | |
3073 | } | |
3074 | ||
697c17a2 | 3075 | #endif /* HAVE_SYNC */ |
85ffea93 | 3076 | |
570d7624 | 3077 | DEFUN ("file-newer-than-file-p", Ffile_newer_than_file_p, Sfile_newer_than_file_p, 2, 2, 0, |
8c1a1077 PJ |
3078 | doc: /* Return t if file FILE1 is newer than file FILE2. |
3079 | If FILE1 does not exist, the answer is nil; | |
3080 | otherwise, if FILE2 does not exist, the answer is t. */) | |
5842a27b | 3081 | (Lisp_Object file1, Lisp_Object file2) |
570d7624 | 3082 | { |
199607e4 | 3083 | Lisp_Object absname1, absname2; |
39adff0d | 3084 | struct stat st1, st2; |
32f4334d | 3085 | Lisp_Object handler; |
09121adc | 3086 | struct gcpro gcpro1, gcpro2; |
570d7624 | 3087 | |
b7826503 PJ |
3088 | CHECK_STRING (file1); |
3089 | CHECK_STRING (file2); | |
570d7624 | 3090 | |
199607e4 RS |
3091 | absname1 = Qnil; |
3092 | GCPRO2 (absname1, file2); | |
4b4deea2 TT |
3093 | absname1 = expand_and_dir_to_file (file1, BVAR (current_buffer, directory)); |
3094 | absname2 = expand_and_dir_to_file (file2, BVAR (current_buffer, directory)); | |
09121adc | 3095 | UNGCPRO; |
570d7624 | 3096 | |
32f4334d RS |
3097 | /* If the file name has special constructs in it, |
3098 | call the corresponding file handler. */ | |
199607e4 | 3099 | handler = Ffind_file_name_handler (absname1, Qfile_newer_than_file_p); |
51cf6d37 | 3100 | if (NILP (handler)) |
199607e4 | 3101 | handler = Ffind_file_name_handler (absname2, Qfile_newer_than_file_p); |
32f4334d | 3102 | if (!NILP (handler)) |
199607e4 | 3103 | return call3 (handler, Qfile_newer_than_file_p, absname1, absname2); |
32f4334d | 3104 | |
b1d1b865 RS |
3105 | GCPRO2 (absname1, absname2); |
3106 | absname1 = ENCODE_FILE (absname1); | |
3107 | absname2 = ENCODE_FILE (absname2); | |
3108 | UNGCPRO; | |
3109 | ||
39adff0d | 3110 | if (stat (SSDATA (absname1), &st1) < 0) |
570d7624 JB |
3111 | return Qnil; |
3112 | ||
39adff0d | 3113 | if (stat (SSDATA (absname2), &st2) < 0) |
570d7624 JB |
3114 | return Qt; |
3115 | ||
39adff0d PE |
3116 | return (EMACS_TIME_GT (get_stat_mtime (&st1), get_stat_mtime (&st2)) |
3117 | ? Qt : Qnil); | |
570d7624 JB |
3118 | } |
3119 | \f | |
6fdaa9a0 KH |
3120 | #ifndef READ_BUF_SIZE |
3121 | #define READ_BUF_SIZE (64 << 10) | |
3122 | #endif | |
d311d28c PE |
3123 | /* Some buffer offsets are stored in 'int' variables. */ |
3124 | verify (READ_BUF_SIZE <= INT_MAX); | |
6fdaa9a0 | 3125 | |
98a7d268 KH |
3126 | /* This function is called after Lisp functions to decide a coding |
3127 | system are called, or when they cause an error. Before they are | |
3128 | called, the current buffer is set unibyte and it contains only a | |
3129 | newly inserted text (thus the buffer was empty before the | |
3130 | insertion). | |
3131 | ||
3132 | The functions may set markers, overlays, text properties, or even | |
3133 | alter the buffer contents, change the current buffer. | |
3134 | ||
3135 | Here, we reset all those changes by: | |
3136 | o set back the current buffer. | |
3137 | o move all markers and overlays to BEG. | |
3138 | o remove all text properties. | |
3139 | o set back the buffer multibyteness. */ | |
f736ffbf KH |
3140 | |
3141 | static Lisp_Object | |
971de7fb | 3142 | decide_coding_unwind (Lisp_Object unwind_data) |
f736ffbf | 3143 | { |
98a7d268 | 3144 | Lisp_Object multibyte, undo_list, buffer; |
f736ffbf | 3145 | |
98a7d268 KH |
3146 | multibyte = XCAR (unwind_data); |
3147 | unwind_data = XCDR (unwind_data); | |
3148 | undo_list = XCAR (unwind_data); | |
3149 | buffer = XCDR (unwind_data); | |
3150 | ||
3151 | if (current_buffer != XBUFFER (buffer)) | |
3152 | set_buffer_internal (XBUFFER (buffer)); | |
3153 | adjust_markers_for_delete (BEG, BEG_BYTE, Z, Z_BYTE); | |
3154 | adjust_overlays_for_delete (BEG, Z - BEG); | |
3155 | BUF_INTERVALS (current_buffer) = 0; | |
3156 | TEMP_SET_PT_BOTH (BEG, BEG_BYTE); | |
3157 | ||
3158 | /* Now we are safe to change the buffer's multibyteness directly. */ | |
4b4deea2 TT |
3159 | BVAR (current_buffer, enable_multibyte_characters) = multibyte; |
3160 | BVAR (current_buffer, undo_list) = undo_list; | |
f736ffbf KH |
3161 | |
3162 | return Qnil; | |
3163 | } | |
3164 | ||
55587f8a | 3165 | |
1b978129 | 3166 | /* Used to pass values from insert-file-contents to read_non_regular. */ |
55587f8a | 3167 | |
1b978129 | 3168 | static int non_regular_fd; |
d311d28c PE |
3169 | static ptrdiff_t non_regular_inserted; |
3170 | static int non_regular_nbytes; | |
55587f8a | 3171 | |
55587f8a | 3172 | |
1b978129 | 3173 | /* Read from a non-regular file. |
438105ed | 3174 | Read non_regular_nbytes bytes max from non_regular_fd. |
1b978129 GM |
3175 | Non_regular_inserted specifies where to put the read bytes. |
3176 | Value is the number of bytes read. */ | |
55587f8a GM |
3177 | |
3178 | static Lisp_Object | |
9c8a2331 | 3179 | read_non_regular (Lisp_Object ignore) |
55587f8a | 3180 | { |
d311d28c | 3181 | int nbytes; |
efdc16c9 | 3182 | |
1b978129 GM |
3183 | immediate_quit = 1; |
3184 | QUIT; | |
3185 | nbytes = emacs_read (non_regular_fd, | |
5976c3fe PE |
3186 | ((char *) BEG_ADDR + PT_BYTE - BEG_BYTE |
3187 | + non_regular_inserted), | |
1b978129 | 3188 | non_regular_nbytes); |
1b978129 GM |
3189 | immediate_quit = 0; |
3190 | return make_number (nbytes); | |
3191 | } | |
55587f8a | 3192 | |
d0e2444e | 3193 | |
1b978129 GM |
3194 | /* Condition-case handler used when reading from non-regular files |
3195 | in insert-file-contents. */ | |
3196 | ||
3197 | static Lisp_Object | |
9c8a2331 | 3198 | read_non_regular_quit (Lisp_Object ignore) |
1b978129 | 3199 | { |
55587f8a GM |
3200 | return Qnil; |
3201 | } | |
3202 | ||
e69dafad PE |
3203 | /* Reposition FD to OFFSET, based on WHENCE. This acts like lseek |
3204 | except that it also tests for OFFSET being out of lseek's range. */ | |
3205 | static off_t | |
3206 | emacs_lseek (int fd, EMACS_INT offset, int whence) | |
3207 | { | |
096a9774 PE |
3208 | /* Use "&" rather than "&&" to suppress a bogus GCC warning; see |
3209 | <http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43772>. */ | |
3210 | if (! ((TYPE_MINIMUM (off_t) <= offset) & (offset <= TYPE_MAXIMUM (off_t)))) | |
e69dafad PE |
3211 | { |
3212 | errno = EINVAL; | |
3213 | return -1; | |
3214 | } | |
3215 | return lseek (fd, offset, whence); | |
3216 | } | |
3217 | ||
f0941253 | 3218 | /* Return a special time value indicating the error number ERRNUM. */ |
dbeed9a6 | 3219 | static EMACS_TIME |
f0941253 | 3220 | time_error_value (int errnum) |
dbeed9a6 PE |
3221 | { |
3222 | EMACS_TIME t; | |
0497dc44 | 3223 | int ns = (errnum == ENOENT || errnum == EACCES || errnum == ENOTDIR |
dbeed9a6 PE |
3224 | ? NONEXISTENT_MODTIME_NSECS |
3225 | : UNKNOWN_MODTIME_NSECS); | |
3226 | EMACS_SET_SECS_NSECS (t, 0, ns); | |
3227 | return t; | |
3228 | } | |
55587f8a | 3229 | |
570d7624 | 3230 | DEFUN ("insert-file-contents", Finsert_file_contents, Sinsert_file_contents, |
8c1a1077 PJ |
3231 | 1, 5, 0, |
3232 | doc: /* Insert contents of file FILENAME after point. | |
cf6d2357 | 3233 | Returns list of absolute file name and number of characters inserted. |
6f2528d8 MR |
3234 | If second argument VISIT is non-nil, the buffer's visited filename and |
3235 | last save file modtime are set, and it is marked unmodified. If | |
3236 | visiting and the file does not exist, visiting is completed before the | |
3237 | error is signaled. | |
3238 | ||
3239 | The optional third and fourth arguments BEG and END specify what portion | |
3240 | of the file to insert. These arguments count bytes in the file, not | |
3241 | characters in the buffer. If VISIT is non-nil, BEG and END must be nil. | |
3242 | ||
3243 | If optional fifth argument REPLACE is non-nil, replace the current | |
3244 | buffer contents (in the accessible portion) with the file contents. | |
3245 | This is better than simply deleting and inserting the whole thing | |
3246 | because (1) it preserves some marker positions and (2) it puts less data | |
3247 | in the undo list. When REPLACE is non-nil, the second return value is | |
3248 | the number of characters that replace previous buffer contents. | |
3249 | ||
3250 | This function does code conversion according to the value of | |
3251 | `coding-system-for-read' or `file-coding-system-alist', and sets the | |
3252 | variable `last-coding-system-used' to the coding system actually used. */) | |
5842a27b | 3253 | (Lisp_Object filename, Lisp_Object visit, Lisp_Object beg, Lisp_Object end, Lisp_Object replace) |
570d7624 JB |
3254 | { |
3255 | struct stat st; | |
dbeed9a6 PE |
3256 | int file_status; |
3257 | EMACS_TIME mtime; | |
570d7624 | 3258 | register int fd; |
d311d28c | 3259 | ptrdiff_t inserted = 0; |
18a9f8d9 | 3260 | int nochange = 0; |
d311d28c | 3261 | register ptrdiff_t how_much; |
728f8f0a | 3262 | off_t beg_offset, end_offset; |
d311d28c PE |
3263 | register int unprocessed; |
3264 | ptrdiff_t count = SPECPDL_INDEX (); | |
6f2528d8 MR |
3265 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4, gcpro5; |
3266 | Lisp_Object handler, val, insval, orig_filename, old_undo; | |
d6a3cc15 | 3267 | Lisp_Object p; |
d311d28c | 3268 | ptrdiff_t total = 0; |
53c34c46 | 3269 | int not_regular = 0; |
e5e9d610 | 3270 | int save_errno = 0; |
5976c3fe | 3271 | char read_buf[READ_BUF_SIZE]; |
6fdaa9a0 | 3272 | struct coding_system coding; |
5976c3fe | 3273 | char buffer[1 << 14]; |
727a0b4a | 3274 | int replace_handled = 0; |
ec7adf26 | 3275 | int set_coding_system = 0; |
db327c7e | 3276 | Lisp_Object coding_system; |
1b978129 | 3277 | int read_quit = 0; |
490ee853 | 3278 | Lisp_Object old_Vdeactivate_mark = Vdeactivate_mark; |
68780e2a | 3279 | int we_locked_file = 0; |
db65a627 | 3280 | int deferred_remove_unwind_protect = 0; |
32f4334d | 3281 | |
95385625 RS |
3282 | if (current_buffer->base_buffer && ! NILP (visit)) |
3283 | error ("Cannot do file visiting in an indirect buffer"); | |
3284 | ||
4b4deea2 | 3285 | if (!NILP (BVAR (current_buffer, read_only))) |
95385625 RS |
3286 | Fbarf_if_buffer_read_only (); |
3287 | ||
32f4334d | 3288 | val = Qnil; |
d6a3cc15 | 3289 | p = Qnil; |
b1d1b865 | 3290 | orig_filename = Qnil; |
6f2528d8 | 3291 | old_undo = Qnil; |
32f4334d | 3292 | |
6f2528d8 | 3293 | GCPRO5 (filename, val, p, orig_filename, old_undo); |
570d7624 | 3294 | |
b7826503 | 3295 | CHECK_STRING (filename); |
570d7624 JB |
3296 | filename = Fexpand_file_name (filename, Qnil); |
3297 | ||
1c157f8d KH |
3298 | /* The value Qnil means that the coding system is not yet |
3299 | decided. */ | |
3300 | coding_system = Qnil; | |
3301 | ||
32f4334d RS |
3302 | /* If the file name has special constructs in it, |
3303 | call the corresponding file handler. */ | |
49307295 | 3304 | handler = Ffind_file_name_handler (filename, Qinsert_file_contents); |
32f4334d RS |
3305 | if (!NILP (handler)) |
3306 | { | |
3d0387c0 RS |
3307 | val = call6 (handler, Qinsert_file_contents, filename, |
3308 | visit, beg, end, replace); | |
d311d28c PE |
3309 | if (CONSP (val) && CONSP (XCDR (val)) |
3310 | && RANGED_INTEGERP (0, XCAR (XCDR (val)), ZV - PT)) | |
03699b14 | 3311 | inserted = XINT (XCAR (XCDR (val))); |
32f4334d RS |
3312 | goto handled; |
3313 | } | |
3314 | ||
b1d1b865 RS |
3315 | orig_filename = filename; |
3316 | filename = ENCODE_FILE (filename); | |
3317 | ||
570d7624 JB |
3318 | fd = -1; |
3319 | ||
c1c4693e RS |
3320 | #ifdef WINDOWSNT |
3321 | { | |
3322 | Lisp_Object tem = Vw32_get_true_file_attributes; | |
3323 | ||
3324 | /* Tell stat to use expensive method to get accurate info. */ | |
3325 | Vw32_get_true_file_attributes = Qt; | |
dbeed9a6 | 3326 | file_status = stat (SSDATA (filename), &st); |
c1c4693e RS |
3327 | Vw32_get_true_file_attributes = tem; |
3328 | } | |
c1c4693e | 3329 | #else |
dbeed9a6 | 3330 | file_status = stat (SSDATA (filename), &st); |
c1c4693e | 3331 | #endif /* WINDOWSNT */ |
dbeed9a6 PE |
3332 | |
3333 | if (file_status == 0) | |
3334 | mtime = get_stat_mtime (&st); | |
3335 | else | |
570d7624 | 3336 | { |
99bc28f4 | 3337 | badopen: |
e5e9d610 | 3338 | save_errno = errno; |
265a9e55 | 3339 | if (NILP (visit)) |
b1d1b865 | 3340 | report_file_error ("Opening input file", Fcons (orig_filename, Qnil)); |
f0941253 | 3341 | mtime = time_error_value (save_errno); |
b885bf36 | 3342 | st.st_size = -1; |
570d7624 | 3343 | how_much = 0; |
0de6b8f4 | 3344 | if (!NILP (Vcoding_system_for_read)) |
22d92d6b | 3345 | Fset (Qbuffer_file_coding_system, Vcoding_system_for_read); |
570d7624 JB |
3346 | goto notfound; |
3347 | } | |
3348 | ||
be53b411 JB |
3349 | /* This code will need to be changed in order to work on named |
3350 | pipes, and it's probably just not worth it. So we should at | |
3351 | least signal an error. */ | |
99bc28f4 | 3352 | if (!S_ISREG (st.st_mode)) |
330bfe57 | 3353 | { |
d4b8687b RS |
3354 | not_regular = 1; |
3355 | ||
3356 | if (! NILP (visit)) | |
3357 | goto notfound; | |
3358 | ||
3359 | if (! NILP (replace) || ! NILP (beg) || ! NILP (end)) | |
24b1ddad KS |
3360 | xsignal2 (Qfile_error, |
3361 | build_string ("not a regular file"), orig_filename); | |
330bfe57 | 3362 | } |
be53b411 | 3363 | |
99bc28f4 | 3364 | if (fd < 0) |
42a5b22f | 3365 | if ((fd = emacs_open (SSDATA (filename), O_RDONLY, 0)) < 0) |
99bc28f4 KH |
3366 | goto badopen; |
3367 | ||
3368 | /* Replacement should preserve point as it preserves markers. */ | |
3369 | if (!NILP (replace)) | |
3370 | record_unwind_protect (restore_point_unwind, Fpoint_marker ()); | |
3371 | ||
3372 | record_unwind_protect (close_file_unwind, make_number (fd)); | |
3373 | ||
2a47c44d | 3374 | |
9f57b6b4 KH |
3375 | if (!NILP (visit)) |
3376 | { | |
3377 | if (!NILP (beg) || !NILP (end)) | |
3378 | error ("Attempt to visit less than an entire file"); | |
3379 | if (BEG < Z && NILP (replace)) | |
3380 | error ("Cannot do file visiting in a non-empty buffer"); | |
3381 | } | |
7fded690 JB |
3382 | |
3383 | if (!NILP (beg)) | |
728f8f0a PE |
3384 | { |
3385 | if (! (RANGED_INTEGERP (0, beg, TYPE_MAXIMUM (off_t)))) | |
3386 | wrong_type_argument (intern ("file-offset"), beg); | |
3387 | beg_offset = XFASTINT (beg); | |
3388 | } | |
7fded690 | 3389 | else |
728f8f0a | 3390 | beg_offset = 0; |
7fded690 JB |
3391 | |
3392 | if (!NILP (end)) | |
728f8f0a PE |
3393 | { |
3394 | if (! (RANGED_INTEGERP (0, end, TYPE_MAXIMUM (off_t)))) | |
3395 | wrong_type_argument (intern ("file-offset"), end); | |
3396 | end_offset = XFASTINT (end); | |
3397 | } | |
7fded690 JB |
3398 | else |
3399 | { | |
728f8f0a PE |
3400 | if (not_regular) |
3401 | end_offset = TYPE_MAXIMUM (off_t); | |
3402 | else | |
d4b8687b | 3403 | { |
728f8f0a PE |
3404 | end_offset = st.st_size; |
3405 | ||
3406 | /* A negative size can happen on a platform that allows file | |
3407 | sizes greater than the maximum off_t value. */ | |
3408 | if (end_offset < 0) | |
3409 | buffer_overflow (); | |
68c45bf0 | 3410 | |
d21dd12d GM |
3411 | /* The file size returned from stat may be zero, but data |
3412 | may be readable nonetheless, for example when this is a | |
3413 | file in the /proc filesystem. */ | |
728f8f0a PE |
3414 | if (end_offset == 0) |
3415 | end_offset = READ_BUF_SIZE; | |
d4b8687b | 3416 | } |
7fded690 JB |
3417 | } |
3418 | ||
728f8f0a PE |
3419 | /* Check now whether the buffer will become too large, |
3420 | in the likely case where the file's length is not changing. | |
3421 | This saves a lot of needless work before a buffer overflow. */ | |
3422 | if (! not_regular) | |
3423 | { | |
3424 | /* The likely offset where we will stop reading. We could read | |
3425 | more (or less), if the file grows (or shrinks) as we read it. */ | |
3426 | off_t likely_end = min (end_offset, st.st_size); | |
3427 | ||
3428 | if (beg_offset < likely_end) | |
3429 | { | |
3430 | ptrdiff_t buf_bytes = | |
3431 | Z_BYTE - (!NILP (replace) ? ZV_BYTE - BEGV_BYTE : 0); | |
3432 | ptrdiff_t buf_growth_max = BUF_BYTES_MAX - buf_bytes; | |
3433 | off_t likely_growth = likely_end - beg_offset; | |
3434 | if (buf_growth_max < likely_growth) | |
3435 | buffer_overflow (); | |
3436 | } | |
3437 | } | |
3438 | ||
3439 | /* Prevent redisplay optimizations. */ | |
3440 | current_buffer->clip_changed = 1; | |
3441 | ||
356a6224 | 3442 | if (EQ (Vcoding_system_for_read, Qauto_save_coding)) |
5560aecd | 3443 | { |
75421805 | 3444 | coding_system = coding_inherit_eol_type (Qutf_8_emacs, Qunix); |
5560aecd KH |
3445 | setup_coding_system (coding_system, &coding); |
3446 | /* Ensure we set Vlast_coding_system_used. */ | |
3447 | set_coding_system = 1; | |
3448 | } | |
356a6224 | 3449 | else if (BEG < Z) |
f736ffbf KH |
3450 | { |
3451 | /* Decide the coding system to use for reading the file now | |
3452 | because we can't use an optimized method for handling | |
3453 | `coding:' tag if the current buffer is not empty. */ | |
f736ffbf | 3454 | if (!NILP (Vcoding_system_for_read)) |
db327c7e | 3455 | coding_system = Vcoding_system_for_read; |
f736ffbf KH |
3456 | else |
3457 | { | |
3458 | /* Don't try looking inside a file for a coding system | |
3459 | specification if it is not seekable. */ | |
3460 | if (! not_regular && ! NILP (Vset_auto_coding_function)) | |
3461 | { | |
3462 | /* Find a coding system specified in the heading two | |
3463 | lines or in the tailing several lines of the file. | |
3464 | We assume that the 1K-byte and 3K-byte for heading | |
003a7eaa | 3465 | and tailing respectively are sufficient for this |
f736ffbf | 3466 | purpose. */ |
d311d28c | 3467 | int nread; |
f736ffbf KH |
3468 | |
3469 | if (st.st_size <= (1024 * 4)) | |
68c45bf0 | 3470 | nread = emacs_read (fd, read_buf, 1024 * 4); |
f736ffbf KH |
3471 | else |
3472 | { | |
68c45bf0 | 3473 | nread = emacs_read (fd, read_buf, 1024); |
f736ffbf KH |
3474 | if (nread >= 0) |
3475 | { | |
e69dafad | 3476 | if (lseek (fd, st.st_size - (1024 * 3), SEEK_SET) < 0) |
f736ffbf KH |
3477 | report_file_error ("Setting file position", |
3478 | Fcons (orig_filename, Qnil)); | |
68c45bf0 | 3479 | nread += emacs_read (fd, read_buf + nread, 1024 * 3); |
f736ffbf KH |
3480 | } |
3481 | } | |
feb9dc27 | 3482 | |
f736ffbf KH |
3483 | if (nread < 0) |
3484 | error ("IO error reading %s: %s", | |
d5db4077 | 3485 | SDATA (orig_filename), emacs_strerror (errno)); |
f736ffbf KH |
3486 | else if (nread > 0) |
3487 | { | |
f736ffbf | 3488 | struct buffer *prev = current_buffer; |
f839df0c | 3489 | Lisp_Object workbuf; |
685fc579 | 3490 | struct buffer *buf; |
f736ffbf KH |
3491 | |
3492 | record_unwind_protect (Fset_buffer, Fcurrent_buffer ()); | |
1d92afcd | 3493 | |
f839df0c PE |
3494 | workbuf = Fget_buffer_create (build_string (" *code-converting-work*")); |
3495 | buf = XBUFFER (workbuf); | |
685fc579 | 3496 | |
29ea8ae9 | 3497 | delete_all_overlays (buf); |
4b4deea2 TT |
3498 | BVAR (buf, directory) = BVAR (current_buffer, directory); |
3499 | BVAR (buf, read_only) = Qnil; | |
3500 | BVAR (buf, filename) = Qnil; | |
3501 | BVAR (buf, undo_list) = Qt; | |
29ea8ae9 SM |
3502 | eassert (buf->overlays_before == NULL); |
3503 | eassert (buf->overlays_after == NULL); | |
efdc16c9 | 3504 | |
685fc579 RS |
3505 | set_buffer_internal (buf); |
3506 | Ferase_buffer (); | |
4b4deea2 | 3507 | BVAR (buf, enable_multibyte_characters) = Qnil; |
685fc579 | 3508 | |
b68864e5 | 3509 | insert_1_both ((char *) read_buf, nread, nread, 0, 0, 0); |
f736ffbf | 3510 | TEMP_SET_PT_BOTH (BEG, BEG_BYTE); |
db327c7e | 3511 | coding_system = call2 (Vset_auto_coding_function, |
8f924df7 | 3512 | filename, make_number (nread)); |
f736ffbf | 3513 | set_buffer_internal (prev); |
efdc16c9 | 3514 | |
f736ffbf KH |
3515 | /* Discard the unwind protect for recovering the |
3516 | current buffer. */ | |
3517 | specpdl_ptr--; | |
3518 | ||
3519 | /* Rewind the file for the actual read done later. */ | |
e69dafad | 3520 | if (lseek (fd, 0, SEEK_SET) < 0) |
f736ffbf KH |
3521 | report_file_error ("Setting file position", |
3522 | Fcons (orig_filename, Qnil)); | |
3523 | } | |
3524 | } | |
feb9dc27 | 3525 | |
db327c7e | 3526 | if (NILP (coding_system)) |
f736ffbf KH |
3527 | { |
3528 | /* If we have not yet decided a coding system, check | |
3529 | file-coding-system-alist. */ | |
8f924df7 | 3530 | Lisp_Object args[6]; |
f736ffbf KH |
3531 | |
3532 | args[0] = Qinsert_file_contents, args[1] = orig_filename; | |
3533 | args[2] = visit, args[3] = beg, args[4] = end, args[5] = replace; | |
8f924df7 KH |
3534 | coding_system = Ffind_operation_coding_system (6, args); |
3535 | if (CONSP (coding_system)) | |
3536 | coding_system = XCAR (coding_system); | |
f736ffbf KH |
3537 | } |
3538 | } | |
c9e82392 | 3539 | |
db327c7e KH |
3540 | if (NILP (coding_system)) |
3541 | coding_system = Qundecided; | |
3542 | else | |
3543 | CHECK_CODING_SYSTEM (coding_system); | |
c8a6d68a | 3544 | |
4b4deea2 | 3545 | if (NILP (BVAR (current_buffer, enable_multibyte_characters))) |
237a6fd2 RS |
3546 | /* We must suppress all character code conversion except for |
3547 | end-of-line conversion. */ | |
db327c7e | 3548 | coding_system = raw_text_coding_system (coding_system); |
54369368 | 3549 | |
db327c7e KH |
3550 | setup_coding_system (coding_system, &coding); |
3551 | /* Ensure we set Vlast_coding_system_used. */ | |
3552 | set_coding_system = 1; | |
f736ffbf | 3553 | } |
6cf71bf1 | 3554 | |
3d0387c0 RS |
3555 | /* If requested, replace the accessible part of the buffer |
3556 | with the file contents. Avoid replacing text at the | |
3557 | beginning or end of the buffer that matches the file contents; | |
3dbcf3f6 RS |
3558 | that preserves markers pointing to the unchanged parts. |
3559 | ||
3560 | Here we implement this feature in an optimized way | |
3561 | for the case where code conversion is NOT needed. | |
3562 | The following if-statement handles the case of conversion | |
727a0b4a RS |
3563 | in a less optimal way. |
3564 | ||
3565 | If the code conversion is "automatic" then we try using this | |
3566 | method and hope for the best. | |
3567 | But if we discover the need for conversion, we give up on this method | |
3568 | and let the following if-statement handle the replace job. */ | |
3dbcf3f6 | 3569 | if (!NILP (replace) |
f736ffbf | 3570 | && BEGV < ZV |
db327c7e KH |
3571 | && (NILP (coding_system) |
3572 | || ! CODING_REQUIRE_DECODING (&coding))) | |
3d0387c0 | 3573 | { |
ec7adf26 RS |
3574 | /* same_at_start and same_at_end count bytes, |
3575 | because file access counts bytes | |
3576 | and BEG and END count bytes. */ | |
d311d28c PE |
3577 | ptrdiff_t same_at_start = BEGV_BYTE; |
3578 | ptrdiff_t same_at_end = ZV_BYTE; | |
3579 | ptrdiff_t overlap; | |
6fdaa9a0 KH |
3580 | /* There is still a possibility we will find the need to do code |
3581 | conversion. If that happens, we set this variable to 1 to | |
727a0b4a | 3582 | give up on handling REPLACE in the optimized way. */ |
6fdaa9a0 | 3583 | int giveup_match_end = 0; |
9c28748f | 3584 | |
728f8f0a | 3585 | if (beg_offset != 0) |
4d2a0879 | 3586 | { |
728f8f0a | 3587 | if (lseek (fd, beg_offset, SEEK_SET) < 0) |
4d2a0879 | 3588 | report_file_error ("Setting file position", |
b1d1b865 | 3589 | Fcons (orig_filename, Qnil)); |
4d2a0879 RS |
3590 | } |
3591 | ||
3d0387c0 RS |
3592 | immediate_quit = 1; |
3593 | QUIT; | |
3594 | /* Count how many chars at the start of the file | |
3595 | match the text at the beginning of the buffer. */ | |
3596 | while (1) | |
3597 | { | |
d311d28c | 3598 | int nread, bufpos; |
3d0387c0 | 3599 | |
68c45bf0 | 3600 | nread = emacs_read (fd, buffer, sizeof buffer); |
3d0387c0 RS |
3601 | if (nread < 0) |
3602 | error ("IO error reading %s: %s", | |
5976c3fe | 3603 | SSDATA (orig_filename), emacs_strerror (errno)); |
3d0387c0 RS |
3604 | else if (nread == 0) |
3605 | break; | |
6fdaa9a0 | 3606 | |
db327c7e | 3607 | if (CODING_REQUIRE_DETECTION (&coding)) |
727a0b4a | 3608 | { |
5976c3fe PE |
3609 | coding_system = detect_coding_system ((unsigned char *) buffer, |
3610 | nread, nread, 1, 0, | |
db327c7e KH |
3611 | coding_system); |
3612 | setup_coding_system (coding_system, &coding); | |
727a0b4a RS |
3613 | } |
3614 | ||
db327c7e KH |
3615 | if (CODING_REQUIRE_DECODING (&coding)) |
3616 | /* We found that the file should be decoded somehow. | |
727a0b4a RS |
3617 | Let's give up here. */ |
3618 | { | |
3619 | giveup_match_end = 1; | |
3620 | break; | |
3621 | } | |
3622 | ||
3d0387c0 | 3623 | bufpos = 0; |
ec7adf26 | 3624 | while (bufpos < nread && same_at_start < ZV_BYTE |
6fdaa9a0 | 3625 | && FETCH_BYTE (same_at_start) == buffer[bufpos]) |
3d0387c0 RS |
3626 | same_at_start++, bufpos++; |
3627 | /* If we found a discrepancy, stop the scan. | |
8e6208c5 | 3628 | Otherwise loop around and scan the next bufferful. */ |
3d0387c0 RS |
3629 | if (bufpos != nread) |
3630 | break; | |
3631 | } | |
3632 | immediate_quit = 0; | |
3633 | /* If the file matches the buffer completely, | |
3634 | there's no need to replace anything. */ | |
2ba8e008 | 3635 | if (same_at_start - BEGV_BYTE == end_offset - beg_offset) |
3d0387c0 | 3636 | { |
68c45bf0 | 3637 | emacs_close (fd); |
a1d2b64a | 3638 | specpdl_ptr--; |
1051b3b3 | 3639 | /* Truncate the buffer to the size of the file. */ |
7dae4502 | 3640 | del_range_1 (same_at_start, same_at_end, 0, 0); |
3d0387c0 RS |
3641 | goto handled; |
3642 | } | |
3643 | immediate_quit = 1; | |
3644 | QUIT; | |
3645 | /* Count how many chars at the end of the file | |
6fdaa9a0 KH |
3646 | match the text at the end of the buffer. But, if we have |
3647 | already found that decoding is necessary, don't waste time. */ | |
3648 | while (!giveup_match_end) | |
3d0387c0 | 3649 | { |
728f8f0a PE |
3650 | int total_read, nread, bufpos, trial; |
3651 | off_t curpos; | |
3d0387c0 RS |
3652 | |
3653 | /* At what file position are we now scanning? */ | |
728f8f0a | 3654 | curpos = end_offset - (ZV_BYTE - same_at_end); |
fc81fa9e KH |
3655 | /* If the entire file matches the buffer tail, stop the scan. */ |
3656 | if (curpos == 0) | |
3657 | break; | |
3d0387c0 RS |
3658 | /* How much can we scan in the next step? */ |
3659 | trial = min (curpos, sizeof buffer); | |
728f8f0a | 3660 | if (lseek (fd, curpos - trial, SEEK_SET) < 0) |
3d0387c0 | 3661 | report_file_error ("Setting file position", |
b1d1b865 | 3662 | Fcons (orig_filename, Qnil)); |
3d0387c0 | 3663 | |
b02439c8 | 3664 | total_read = nread = 0; |
3d0387c0 RS |
3665 | while (total_read < trial) |
3666 | { | |
68c45bf0 | 3667 | nread = emacs_read (fd, buffer + total_read, trial - total_read); |
2bd2273e | 3668 | if (nread < 0) |
3d0387c0 | 3669 | error ("IO error reading %s: %s", |
d5db4077 | 3670 | SDATA (orig_filename), emacs_strerror (errno)); |
2bd2273e GM |
3671 | else if (nread == 0) |
3672 | break; | |
3d0387c0 RS |
3673 | total_read += nread; |
3674 | } | |
efdc16c9 | 3675 | |
8e6208c5 | 3676 | /* Scan this bufferful from the end, comparing with |
3d0387c0 RS |
3677 | the Emacs buffer. */ |
3678 | bufpos = total_read; | |
efdc16c9 | 3679 | |
3d0387c0 RS |
3680 | /* Compare with same_at_start to avoid counting some buffer text |
3681 | as matching both at the file's beginning and at the end. */ | |
3682 | while (bufpos > 0 && same_at_end > same_at_start | |
6fdaa9a0 | 3683 | && FETCH_BYTE (same_at_end - 1) == buffer[bufpos - 1]) |
3d0387c0 | 3684 | same_at_end--, bufpos--; |
727a0b4a | 3685 | |
3d0387c0 | 3686 | /* If we found a discrepancy, stop the scan. |
8e6208c5 | 3687 | Otherwise loop around and scan the preceding bufferful. */ |
3d0387c0 | 3688 | if (bufpos != 0) |
727a0b4a RS |
3689 | { |
3690 | /* If this discrepancy is because of code conversion, | |
3691 | we cannot use this method; giveup and try the other. */ | |
3692 | if (same_at_end > same_at_start | |
3693 | && FETCH_BYTE (same_at_end - 1) >= 0200 | |
4b4deea2 | 3694 | && ! NILP (BVAR (current_buffer, enable_multibyte_characters)) |
c8a6d68a | 3695 | && (CODING_MAY_REQUIRE_DECODING (&coding))) |
727a0b4a RS |
3696 | giveup_match_end = 1; |
3697 | break; | |
3698 | } | |
b02439c8 GM |
3699 | |
3700 | if (nread == 0) | |
3701 | break; | |
3d0387c0 RS |
3702 | } |
3703 | immediate_quit = 0; | |
9c28748f | 3704 | |
727a0b4a RS |
3705 | if (! giveup_match_end) |
3706 | { | |
d311d28c | 3707 | ptrdiff_t temp; |
ec7adf26 | 3708 | |
727a0b4a | 3709 | /* We win! We can handle REPLACE the optimized way. */ |
9c28748f | 3710 | |
20f6783d RS |
3711 | /* Extend the start of non-matching text area to multibyte |
3712 | character boundary. */ | |
4b4deea2 | 3713 | if (! NILP (BVAR (current_buffer, enable_multibyte_characters))) |
20f6783d RS |
3714 | while (same_at_start > BEGV_BYTE |
3715 | && ! CHAR_HEAD_P (FETCH_BYTE (same_at_start))) | |
3716 | same_at_start--; | |
3717 | ||
3718 | /* Extend the end of non-matching text area to multibyte | |
71312b68 | 3719 | character boundary. */ |
4b4deea2 | 3720 | if (! NILP (BVAR (current_buffer, enable_multibyte_characters))) |
ec7adf26 RS |
3721 | while (same_at_end < ZV_BYTE |
3722 | && ! CHAR_HEAD_P (FETCH_BYTE (same_at_end))) | |
71312b68 RS |
3723 | same_at_end++; |
3724 | ||
727a0b4a | 3725 | /* Don't try to reuse the same piece of text twice. */ |
ec7adf26 | 3726 | overlap = (same_at_start - BEGV_BYTE |
728f8f0a PE |
3727 | - (same_at_end |
3728 | + (! NILP (end) ? end_offset : st.st_size) - ZV_BYTE)); | |
727a0b4a RS |
3729 | if (overlap > 0) |
3730 | same_at_end += overlap; | |
9c28748f | 3731 | |
727a0b4a | 3732 | /* Arrange to read only the nonmatching middle part of the file. */ |
728f8f0a PE |
3733 | beg_offset += same_at_start - BEGV_BYTE; |
3734 | end_offset -= ZV_BYTE - same_at_end; | |
3dbcf3f6 | 3735 | |
ec7adf26 | 3736 | del_range_byte (same_at_start, same_at_end, 0); |
727a0b4a | 3737 | /* Insert from the file at the proper position. */ |
ec7adf26 RS |
3738 | temp = BYTE_TO_CHAR (same_at_start); |
3739 | SET_PT_BOTH (temp, same_at_start); | |
727a0b4a RS |
3740 | |
3741 | /* If display currently starts at beginning of line, | |
3742 | keep it that way. */ | |
3743 | if (XBUFFER (XWINDOW (selected_window)->buffer) == current_buffer) | |
c98ff5dd | 3744 | XWINDOW (selected_window)->start_at_line_beg = !NILP (Fbolp ()); |
727a0b4a RS |
3745 | |
3746 | replace_handled = 1; | |
3747 | } | |
3dbcf3f6 RS |
3748 | } |
3749 | ||
3750 | /* If requested, replace the accessible part of the buffer | |
3751 | with the file contents. Avoid replacing text at the | |
3752 | beginning or end of the buffer that matches the file contents; | |
3753 | that preserves markers pointing to the unchanged parts. | |
3754 | ||
3755 | Here we implement this feature for the case where code conversion | |
3756 | is needed, in a simple way that needs a lot of memory. | |
3757 | The preceding if-statement handles the case of no conversion | |
3758 | in a more optimized way. */ | |
f736ffbf | 3759 | if (!NILP (replace) && ! replace_handled && BEGV < ZV) |
3dbcf3f6 | 3760 | { |
d311d28c PE |
3761 | ptrdiff_t same_at_start = BEGV_BYTE; |
3762 | ptrdiff_t same_at_end = ZV_BYTE; | |
3763 | ptrdiff_t same_at_start_charpos; | |
3764 | ptrdiff_t inserted_chars; | |
3765 | ptrdiff_t overlap; | |
3766 | ptrdiff_t bufpos; | |
db327c7e | 3767 | unsigned char *decoded; |
d311d28c PE |
3768 | ptrdiff_t temp; |
3769 | ptrdiff_t this = 0; | |
3770 | ptrdiff_t this_count = SPECPDL_INDEX (); | |
4b4deea2 | 3771 | int multibyte = ! NILP (BVAR (current_buffer, enable_multibyte_characters)); |
5b359650 | 3772 | Lisp_Object conversion_buffer; |
83aca1cb | 3773 | struct gcpro gcpro1; |
db327c7e | 3774 | |
5b359650 | 3775 | conversion_buffer = code_conversion_save (1, multibyte); |
3dbcf3f6 RS |
3776 | |
3777 | /* First read the whole file, performing code conversion into | |
3778 | CONVERSION_BUFFER. */ | |
3779 | ||
728f8f0a | 3780 | if (lseek (fd, beg_offset, SEEK_SET) < 0) |
8f924df7 KH |
3781 | report_file_error ("Setting file position", |
3782 | Fcons (orig_filename, Qnil)); | |
727a0b4a | 3783 | |
3dbcf3f6 RS |
3784 | total = st.st_size; /* Total bytes in the file. */ |
3785 | how_much = 0; /* Bytes read from file so far. */ | |
3786 | inserted = 0; /* Bytes put into CONVERSION_BUFFER so far. */ | |
3787 | unprocessed = 0; /* Bytes not processed in previous loop. */ | |
3788 | ||
2ba48777 | 3789 | GCPRO1 (conversion_buffer); |
3dbcf3f6 RS |
3790 | while (how_much < total) |
3791 | { | |
db327c7e KH |
3792 | /* We read one bunch by one (READ_BUF_SIZE bytes) to allow |
3793 | quitting while reading a huge while. */ | |
a5bb9bd3 | 3794 | /* `try'' is reserved in some compilers (Microsoft C). */ |
d311d28c | 3795 | int trytry = min (total - how_much, READ_BUF_SIZE - unprocessed); |
3dbcf3f6 RS |
3796 | |
3797 | /* Allow quitting out of the actual I/O. */ | |
3798 | immediate_quit = 1; | |
3799 | QUIT; | |
db327c7e | 3800 | this = emacs_read (fd, read_buf + unprocessed, trytry); |
3dbcf3f6 RS |
3801 | immediate_quit = 0; |
3802 | ||
db327c7e | 3803 | if (this <= 0) |
43aae36e | 3804 | break; |
3dbcf3f6 RS |
3805 | |
3806 | how_much += this; | |
3807 | ||
bf1c0f27 SM |
3808 | BUF_TEMP_SET_PT (XBUFFER (conversion_buffer), |
3809 | BUF_Z (XBUFFER (conversion_buffer))); | |
5976c3fe PE |
3810 | decode_coding_c_string (&coding, (unsigned char *) read_buf, |
3811 | unprocessed + this, conversion_buffer); | |
db327c7e KH |
3812 | unprocessed = coding.carryover_bytes; |
3813 | if (coding.carryover_bytes > 0) | |
72af86bd | 3814 | memcpy (read_buf, coding.carryover, unprocessed); |
3dbcf3f6 | 3815 | } |
2ba48777 | 3816 | UNGCPRO; |
db327c7e | 3817 | emacs_close (fd); |
3dbcf3f6 | 3818 | |
db65a627 CY |
3819 | /* We should remove the unwind_protect calling |
3820 | close_file_unwind, but other stuff has been added the stack, | |
3821 | so defer the removal till we reach the `handled' label. */ | |
3822 | deferred_remove_unwind_protect = 1; | |
3823 | ||
db327c7e KH |
3824 | /* At this point, HOW_MUCH should equal TOTAL, or should be <= 0 |
3825 | if we couldn't read the file. */ | |
3dbcf3f6 | 3826 | |
43aae36e | 3827 | if (this < 0) |
4ed925c6 MB |
3828 | error ("IO error reading %s: %s", |
3829 | SDATA (orig_filename), emacs_strerror (errno)); | |
3dbcf3f6 | 3830 | |
db327c7e KH |
3831 | if (unprocessed > 0) |
3832 | { | |
3833 | coding.mode |= CODING_MODE_LAST_BLOCK; | |
5976c3fe PE |
3834 | decode_coding_c_string (&coding, (unsigned char *) read_buf, |
3835 | unprocessed, conversion_buffer); | |
db327c7e KH |
3836 | coding.mode &= ~CODING_MODE_LAST_BLOCK; |
3837 | } | |
3838 | ||
50b06221 | 3839 | coding_system = CODING_ID_NAME (coding.id); |
f6a07420 | 3840 | set_coding_system = 1; |
db327c7e | 3841 | decoded = BUF_BEG_ADDR (XBUFFER (conversion_buffer)); |
50342b35 KH |
3842 | inserted = (BUF_Z_BYTE (XBUFFER (conversion_buffer)) |
3843 | - BUF_BEG_BYTE (XBUFFER (conversion_buffer))); | |
db327c7e KH |
3844 | |
3845 | /* Compare the beginning of the converted string with the buffer | |
3846 | text. */ | |
3dbcf3f6 RS |
3847 | |
3848 | bufpos = 0; | |
3849 | while (bufpos < inserted && same_at_start < same_at_end | |
db327c7e | 3850 | && FETCH_BYTE (same_at_start) == decoded[bufpos]) |
3dbcf3f6 RS |
3851 | same_at_start++, bufpos++; |
3852 | ||
db327c7e | 3853 | /* If the file matches the head of buffer completely, |
3dbcf3f6 RS |
3854 | there's no need to replace anything. */ |
3855 | ||
3856 | if (bufpos == inserted) | |
3857 | { | |
3dbcf3f6 | 3858 | /* Truncate the buffer to the size of the file. */ |
18a9f8d9 SM |
3859 | if (same_at_start == same_at_end) |
3860 | nochange = 1; | |
3861 | else | |
3862 | del_range_byte (same_at_start, same_at_end, 0); | |
427f5aab | 3863 | inserted = 0; |
e8553dd1 KH |
3864 | |
3865 | unbind_to (this_count, Qnil); | |
3dbcf3f6 RS |
3866 | goto handled; |
3867 | } | |
3868 | ||
db327c7e KH |
3869 | /* Extend the start of non-matching text area to the previous |
3870 | multibyte character boundary. */ | |
4b4deea2 | 3871 | if (! NILP (BVAR (current_buffer, enable_multibyte_characters))) |
20f6783d RS |
3872 | while (same_at_start > BEGV_BYTE |
3873 | && ! CHAR_HEAD_P (FETCH_BYTE (same_at_start))) | |
3874 | same_at_start--; | |
3875 | ||
3dbcf3f6 RS |
3876 | /* Scan this bufferful from the end, comparing with |
3877 | the Emacs buffer. */ | |
3878 | bufpos = inserted; | |
3879 | ||
3880 | /* Compare with same_at_start to avoid counting some buffer text | |
3881 | as matching both at the file's beginning and at the end. */ | |
3882 | while (bufpos > 0 && same_at_end > same_at_start | |
db327c7e | 3883 | && FETCH_BYTE (same_at_end - 1) == decoded[bufpos - 1]) |
3dbcf3f6 RS |
3884 | same_at_end--, bufpos--; |
3885 | ||
db327c7e KH |
3886 | /* Extend the end of non-matching text area to the next |
3887 | multibyte character boundary. */ | |
4b4deea2 | 3888 | if (! NILP (BVAR (current_buffer, enable_multibyte_characters))) |
20f6783d RS |
3889 | while (same_at_end < ZV_BYTE |
3890 | && ! CHAR_HEAD_P (FETCH_BYTE (same_at_end))) | |
3891 | same_at_end++; | |
3892 | ||
3dbcf3f6 | 3893 | /* Don't try to reuse the same piece of text twice. */ |
ec7adf26 | 3894 | overlap = same_at_start - BEGV_BYTE - (same_at_end + inserted - ZV_BYTE); |
3dbcf3f6 RS |
3895 | if (overlap > 0) |
3896 | same_at_end += overlap; | |
3897 | ||
727a0b4a RS |
3898 | /* If display currently starts at beginning of line, |
3899 | keep it that way. */ | |
3900 | if (XBUFFER (XWINDOW (selected_window)->buffer) == current_buffer) | |
c98ff5dd | 3901 | XWINDOW (selected_window)->start_at_line_beg = !NILP (Fbolp ()); |
727a0b4a | 3902 | |
3dbcf3f6 RS |
3903 | /* Replace the chars that we need to replace, |
3904 | and update INSERTED to equal the number of bytes | |
db327c7e | 3905 | we are taking from the decoded string. */ |
4b70e2c9 | 3906 | inserted -= (ZV_BYTE - same_at_end) + (same_at_start - BEGV_BYTE); |
427f5aab | 3907 | |
643c73b9 | 3908 | if (same_at_end != same_at_start) |
427f5aab KH |
3909 | { |
3910 | del_range_byte (same_at_start, same_at_end, 0); | |
3911 | temp = GPT; | |
3912 | same_at_start = GPT_BYTE; | |
3913 | } | |
643c73b9 RS |
3914 | else |
3915 | { | |
643c73b9 | 3916 | temp = BYTE_TO_CHAR (same_at_start); |
643c73b9 | 3917 | } |
427f5aab KH |
3918 | /* Insert from the file at the proper position. */ |
3919 | SET_PT_BOTH (temp, same_at_start); | |
50342b35 KH |
3920 | same_at_start_charpos |
3921 | = buf_bytepos_to_charpos (XBUFFER (conversion_buffer), | |
7f5d2c72 SM |
3922 | same_at_start - BEGV_BYTE |
3923 | + BUF_BEG_BYTE (XBUFFER (conversion_buffer))); | |
50342b35 KH |
3924 | inserted_chars |
3925 | = (buf_bytepos_to_charpos (XBUFFER (conversion_buffer), | |
7f5d2c72 SM |
3926 | same_at_start + inserted - BEGV_BYTE |
3927 | + BUF_BEG_BYTE (XBUFFER (conversion_buffer))) | |
50342b35 | 3928 | - same_at_start_charpos); |
d07af40d KH |
3929 | /* This binding is to avoid ask-user-about-supersession-threat |
3930 | being called in insert_from_buffer (via in | |
3931 | prepare_to_modify_buffer). */ | |
3932 | specbind (intern ("buffer-file-name"), Qnil); | |
db327c7e | 3933 | insert_from_buffer (XBUFFER (conversion_buffer), |
50342b35 | 3934 | same_at_start_charpos, inserted_chars, 0); |
427f5aab KH |
3935 | /* Set `inserted' to the number of inserted characters. */ |
3936 | inserted = PT - temp; | |
77343e1d KH |
3937 | /* Set point before the inserted characters. */ |
3938 | SET_PT_BOTH (temp, same_at_start); | |
3dbcf3f6 | 3939 | |
db327c7e | 3940 | unbind_to (this_count, Qnil); |
3dbcf3f6 | 3941 | |
3dbcf3f6 | 3942 | goto handled; |
3d0387c0 RS |
3943 | } |
3944 | ||
d4b8687b | 3945 | if (! not_regular) |
728f8f0a | 3946 | total = end_offset - beg_offset; |
d4b8687b RS |
3947 | else |
3948 | /* For a special file, all we can do is guess. */ | |
3949 | total = READ_BUF_SIZE; | |
570d7624 | 3950 | |
8b913b57 | 3951 | if (NILP (visit) && total > 0) |
68780e2a RS |
3952 | { |
3953 | #ifdef CLASH_DETECTION | |
4b4deea2 | 3954 | if (!NILP (BVAR (current_buffer, file_truename)) |
68780e2a | 3955 | /* Make binding buffer-file-name to nil effective. */ |
4b4deea2 | 3956 | && !NILP (BVAR (current_buffer, filename)) |
68780e2a RS |
3957 | && SAVE_MODIFF >= MODIFF) |
3958 | we_locked_file = 1; | |
3959 | #endif /* CLASH_DETECTION */ | |
3960 | prepare_to_modify_buffer (GPT, GPT, NULL); | |
3961 | } | |
570d7624 | 3962 | |
7fe52289 | 3963 | move_gap (PT); |
7fded690 JB |
3964 | if (GAP_SIZE < total) |
3965 | make_gap (total - GAP_SIZE); | |
3966 | ||
728f8f0a | 3967 | if (beg_offset != 0 || !NILP (replace)) |
7fded690 | 3968 | { |
728f8f0a | 3969 | if (lseek (fd, beg_offset, SEEK_SET) < 0) |
b1d1b865 RS |
3970 | report_file_error ("Setting file position", |
3971 | Fcons (orig_filename, Qnil)); | |
7fded690 JB |
3972 | } |
3973 | ||
6fdaa9a0 | 3974 | /* In the following loop, HOW_MUCH contains the total bytes read so |
c8a6d68a KH |
3975 | far for a regular file, and not changed for a special file. But, |
3976 | before exiting the loop, it is set to a negative value if I/O | |
3977 | error occurs. */ | |
a1d2b64a | 3978 | how_much = 0; |
efdc16c9 | 3979 | |
6fdaa9a0 KH |
3980 | /* Total bytes inserted. */ |
3981 | inserted = 0; | |
efdc16c9 | 3982 | |
c8a6d68a | 3983 | /* Here, we don't do code conversion in the loop. It is done by |
db327c7e | 3984 | decode_coding_gap after all data are read into the buffer. */ |
1b978129 | 3985 | { |
d311d28c | 3986 | ptrdiff_t gap_size = GAP_SIZE; |
efdc16c9 | 3987 | |
1b978129 GM |
3988 | while (how_much < total) |
3989 | { | |
5e570b75 | 3990 | /* try is reserved in some compilers (Microsoft C) */ |
d311d28c PE |
3991 | int trytry = min (total - how_much, READ_BUF_SIZE); |
3992 | ptrdiff_t this; | |
570d7624 | 3993 | |
1b978129 GM |
3994 | if (not_regular) |
3995 | { | |
f839df0c | 3996 | Lisp_Object nbytes; |
570d7624 | 3997 | |
1b978129 GM |
3998 | /* Maybe make more room. */ |
3999 | if (gap_size < trytry) | |
4000 | { | |
4001 | make_gap (total - gap_size); | |
4002 | gap_size = GAP_SIZE; | |
4003 | } | |
4004 | ||
4005 | /* Read from the file, capturing `quit'. When an | |
4006 | error occurs, end the loop, and arrange for a quit | |
4007 | to be signaled after decoding the text we read. */ | |
4008 | non_regular_fd = fd; | |
4009 | non_regular_inserted = inserted; | |
4010 | non_regular_nbytes = trytry; | |
f839df0c PE |
4011 | nbytes = internal_condition_case_1 (read_non_regular, |
4012 | Qnil, Qerror, | |
4013 | read_non_regular_quit); | |
4014 | if (NILP (nbytes)) | |
1b978129 GM |
4015 | { |
4016 | read_quit = 1; | |
4017 | break; | |
4018 | } | |
4019 | ||
f839df0c | 4020 | this = XINT (nbytes); |
1b978129 GM |
4021 | } |
4022 | else | |
4023 | { | |
4024 | /* Allow quitting out of the actual I/O. We don't make text | |
4025 | part of the buffer until all the reading is done, so a C-g | |
4026 | here doesn't do any harm. */ | |
4027 | immediate_quit = 1; | |
4028 | QUIT; | |
5976c3fe PE |
4029 | this = emacs_read (fd, |
4030 | ((char *) BEG_ADDR + PT_BYTE - BEG_BYTE | |
4031 | + inserted), | |
4032 | trytry); | |
1b978129 GM |
4033 | immediate_quit = 0; |
4034 | } | |
efdc16c9 | 4035 | |
1b978129 GM |
4036 | if (this <= 0) |
4037 | { | |
4038 | how_much = this; | |
4039 | break; | |
4040 | } | |
4041 | ||
4042 | gap_size -= this; | |
4043 | ||
4044 | /* For a regular file, where TOTAL is the real size, | |
4045 | count HOW_MUCH to compare with it. | |
4046 | For a special file, where TOTAL is just a buffer size, | |
4047 | so don't bother counting in HOW_MUCH. | |
4048 | (INSERTED is where we count the number of characters inserted.) */ | |
4049 | if (! not_regular) | |
4050 | how_much += this; | |
4051 | inserted += this; | |
4052 | } | |
4053 | } | |
4054 | ||
68780e2a RS |
4055 | /* Now we have read all the file data into the gap. |
4056 | If it was empty, undo marking the buffer modified. */ | |
4057 | ||
4058 | if (inserted == 0) | |
4059 | { | |
6840d350 | 4060 | #ifdef CLASH_DETECTION |
68780e2a | 4061 | if (we_locked_file) |
4b4deea2 | 4062 | unlock_file (BVAR (current_buffer, file_truename)); |
6840d350 | 4063 | #endif |
68780e2a RS |
4064 | Vdeactivate_mark = old_Vdeactivate_mark; |
4065 | } | |
83c1cf6d RS |
4066 | else |
4067 | Vdeactivate_mark = Qt; | |
68780e2a | 4068 | |
1b978129 GM |
4069 | /* Make the text read part of the buffer. */ |
4070 | GAP_SIZE -= inserted; | |
4071 | GPT += inserted; | |
4072 | GPT_BYTE += inserted; | |
4073 | ZV += inserted; | |
4074 | ZV_BYTE += inserted; | |
4075 | Z += inserted; | |
4076 | Z_BYTE += inserted; | |
6fdaa9a0 | 4077 | |
c8a6d68a KH |
4078 | if (GAP_SIZE > 0) |
4079 | /* Put an anchor to ensure multi-byte form ends at gap. */ | |
4080 | *GPT_ADDR = 0; | |
d4b8687b | 4081 | |
68c45bf0 | 4082 | emacs_close (fd); |
6fdaa9a0 | 4083 | |
c8a6d68a KH |
4084 | /* Discard the unwind protect for closing the file. */ |
4085 | specpdl_ptr--; | |
6fdaa9a0 | 4086 | |
c8a6d68a KH |
4087 | if (how_much < 0) |
4088 | error ("IO error reading %s: %s", | |
d5db4077 | 4089 | SDATA (orig_filename), emacs_strerror (errno)); |
ec7adf26 | 4090 | |
f8569325 DL |
4091 | notfound: |
4092 | ||
db327c7e | 4093 | if (NILP (coding_system)) |
c8a6d68a | 4094 | { |
2df42e09 | 4095 | /* The coding system is not yet decided. Decide it by an |
dfe35e7b RS |
4096 | optimized method for handling `coding:' tag. |
4097 | ||
4098 | Note that we can get here only if the buffer was empty | |
4099 | before the insertion. */ | |
f736ffbf | 4100 | |
2df42e09 | 4101 | if (!NILP (Vcoding_system_for_read)) |
db327c7e | 4102 | coding_system = Vcoding_system_for_read; |
2df42e09 KH |
4103 | else |
4104 | { | |
98a7d268 KH |
4105 | /* Since we are sure that the current buffer was empty |
4106 | before the insertion, we can toggle | |
4107 | enable-multibyte-characters directly here without taking | |
9a7f80aa KH |
4108 | care of marker adjustment. By this way, we can run Lisp |
4109 | program safely before decoding the inserted text. */ | |
98a7d268 | 4110 | Lisp_Object unwind_data; |
d311d28c | 4111 | ptrdiff_t count1 = SPECPDL_INDEX (); |
2df42e09 | 4112 | |
4b4deea2 TT |
4113 | unwind_data = Fcons (BVAR (current_buffer, enable_multibyte_characters), |
4114 | Fcons (BVAR (current_buffer, undo_list), | |
98a7d268 | 4115 | Fcurrent_buffer ())); |
4b4deea2 TT |
4116 | BVAR (current_buffer, enable_multibyte_characters) = Qnil; |
4117 | BVAR (current_buffer, undo_list) = Qt; | |
98a7d268 KH |
4118 | record_unwind_protect (decide_coding_unwind, unwind_data); |
4119 | ||
4120 | if (inserted > 0 && ! NILP (Vset_auto_coding_function)) | |
4121 | { | |
db327c7e | 4122 | coding_system = call2 (Vset_auto_coding_function, |
8f924df7 | 4123 | filename, make_number (inserted)); |
2df42e09 | 4124 | } |
f736ffbf | 4125 | |
db327c7e | 4126 | if (NILP (coding_system)) |
2df42e09 KH |
4127 | { |
4128 | /* If the coding system is not yet decided, check | |
4129 | file-coding-system-alist. */ | |
8f924df7 | 4130 | Lisp_Object args[6]; |
f736ffbf | 4131 | |
2df42e09 KH |
4132 | args[0] = Qinsert_file_contents, args[1] = orig_filename; |
4133 | args[2] = visit, args[3] = beg, args[4] = end, args[5] = Qnil; | |
8f924df7 KH |
4134 | coding_system = Ffind_operation_coding_system (6, args); |
4135 | if (CONSP (coding_system)) | |
4136 | coding_system = XCAR (coding_system); | |
f736ffbf | 4137 | } |
f839df0c | 4138 | unbind_to (count1, Qnil); |
98a7d268 | 4139 | inserted = Z_BYTE - BEG_BYTE; |
2df42e09 | 4140 | } |
f736ffbf | 4141 | |
db327c7e KH |
4142 | if (NILP (coding_system)) |
4143 | coding_system = Qundecided; | |
4144 | else | |
4145 | CHECK_CODING_SYSTEM (coding_system); | |
f736ffbf | 4146 | |
4b4deea2 | 4147 | if (NILP (BVAR (current_buffer, enable_multibyte_characters))) |
237a6fd2 | 4148 | /* We must suppress all character code conversion except for |
2df42e09 | 4149 | end-of-line conversion. */ |
db327c7e | 4150 | coding_system = raw_text_coding_system (coding_system); |
db327c7e KH |
4151 | setup_coding_system (coding_system, &coding); |
4152 | /* Ensure we set Vlast_coding_system_used. */ | |
4153 | set_coding_system = 1; | |
2df42e09 | 4154 | } |
f736ffbf | 4155 | |
db327c7e | 4156 | if (!NILP (visit)) |
8c3b9441 | 4157 | { |
db327c7e | 4158 | /* When we visit a file by raw-text, we change the buffer to |
9a7f80aa | 4159 | unibyte. */ |
db327c7e KH |
4160 | if (CODING_FOR_UNIBYTE (&coding) |
4161 | /* Can't do this if part of the buffer might be preserved. */ | |
4162 | && NILP (replace)) | |
4163 | /* Visiting a file with these coding system makes the buffer | |
4164 | unibyte. */ | |
4b4deea2 | 4165 | BVAR (current_buffer, enable_multibyte_characters) = Qnil; |
8c3b9441 KH |
4166 | } |
4167 | ||
4b4deea2 | 4168 | coding.dst_multibyte = ! NILP (BVAR (current_buffer, enable_multibyte_characters)); |
5b359650 | 4169 | if (CODING_MAY_REQUIRE_DECODING (&coding) |
1c157f8d | 4170 | && (inserted > 0 || CODING_REQUIRE_FLUSHING (&coding))) |
2df42e09 | 4171 | { |
db327c7e KH |
4172 | move_gap_both (PT, PT_BYTE); |
4173 | GAP_SIZE += inserted; | |
4174 | ZV_BYTE -= inserted; | |
4175 | Z_BYTE -= inserted; | |
4176 | ZV -= inserted; | |
4177 | Z -= inserted; | |
4178 | decode_coding_gap (&coding, inserted, inserted); | |
4179 | inserted = coding.produced_char; | |
5b359650 | 4180 | coding_system = CODING_ID_NAME (coding.id); |
2df42e09 | 4181 | } |
db327c7e KH |
4182 | else if (inserted > 0) |
4183 | adjust_after_insert (PT, PT_BYTE, PT + inserted, PT_BYTE + inserted, | |
4184 | inserted); | |
570d7624 | 4185 | |
0068070e SM |
4186 | /* Call after-change hooks for the inserted text, aside from the case |
4187 | of normal visiting (not with REPLACE), which is done in a new buffer | |
4188 | "before" the buffer is changed. */ | |
4189 | if (inserted > 0 && total > 0 | |
4190 | && (NILP (visit) || !NILP (replace))) | |
4191 | { | |
4192 | signal_after_change (PT, 0, inserted); | |
4193 | update_compositions (PT, PT, CHECK_BORDER); | |
4194 | } | |
4195 | ||
cf6d2357 RS |
4196 | /* Now INSERTED is measured in characters. */ |
4197 | ||
32f4334d | 4198 | handled: |
570d7624 | 4199 | |
db65a627 CY |
4200 | if (deferred_remove_unwind_protect) |
4201 | /* If requested above, discard the unwind protect for closing the | |
4202 | file. */ | |
4203 | specpdl_ptr--; | |
4204 | ||
265a9e55 | 4205 | if (!NILP (visit)) |
570d7624 | 4206 | { |
4b4deea2 TT |
4207 | if (!EQ (BVAR (current_buffer, undo_list), Qt) && !nochange) |
4208 | BVAR (current_buffer, undo_list) = Qnil; | |
62bcf009 | 4209 | |
a7e82472 RS |
4210 | if (NILP (handler)) |
4211 | { | |
dbeed9a6 | 4212 | current_buffer->modtime = mtime; |
58b963f7 | 4213 | current_buffer->modtime_size = st.st_size; |
4b4deea2 | 4214 | BVAR (current_buffer, filename) = orig_filename; |
a7e82472 | 4215 | } |
62bcf009 | 4216 | |
95385625 | 4217 | SAVE_MODIFF = MODIFF; |
0b5397c2 | 4218 | BUF_AUTOSAVE_MODIFF (current_buffer) = MODIFF; |
4b4deea2 | 4219 | XSETFASTINT (BVAR (current_buffer, save_length), Z - BEG); |
570d7624 | 4220 | #ifdef CLASH_DETECTION |
32f4334d RS |
4221 | if (NILP (handler)) |
4222 | { | |
4b4deea2 TT |
4223 | if (!NILP (BVAR (current_buffer, file_truename))) |
4224 | unlock_file (BVAR (current_buffer, file_truename)); | |
32f4334d RS |
4225 | unlock_file (filename); |
4226 | } | |
570d7624 | 4227 | #endif /* CLASH_DETECTION */ |
330bfe57 | 4228 | if (not_regular) |
24b1ddad KS |
4229 | xsignal2 (Qfile_error, |
4230 | build_string ("not a regular file"), orig_filename); | |
570d7624 JB |
4231 | } |
4232 | ||
b6426b03 | 4233 | if (set_coding_system) |
8f924df7 | 4234 | Vlast_coding_system_used = coding_system; |
b6426b03 | 4235 | |
2080470e | 4236 | if (! NILP (Ffboundp (Qafter_insert_file_set_coding))) |
b6426b03 | 4237 | { |
37a3c774 KH |
4238 | insval = call2 (Qafter_insert_file_set_coding, make_number (inserted), |
4239 | visit); | |
b6426b03 KH |
4240 | if (! NILP (insval)) |
4241 | { | |
d311d28c PE |
4242 | if (! RANGED_INTEGERP (0, insval, ZV - PT)) |
4243 | wrong_type_argument (intern ("inserted-chars"), insval); | |
b6426b03 KH |
4244 | inserted = XFASTINT (insval); |
4245 | } | |
4246 | } | |
4247 | ||
6420e80c | 4248 | /* Decode file format. */ |
c8a6d68a | 4249 | if (inserted > 0) |
0d420e88 | 4250 | { |
6420e80c | 4251 | /* Don't run point motion or modification hooks when decoding. */ |
d311d28c PE |
4252 | ptrdiff_t count1 = SPECPDL_INDEX (); |
4253 | ptrdiff_t old_inserted = inserted; | |
6f2528d8 MR |
4254 | specbind (Qinhibit_point_motion_hooks, Qt); |
4255 | specbind (Qinhibit_modification_hooks, Qt); | |
4256 | ||
6420e80c | 4257 | /* Save old undo list and don't record undo for decoding. */ |
4b4deea2 TT |
4258 | old_undo = BVAR (current_buffer, undo_list); |
4259 | BVAR (current_buffer, undo_list) = Qt; | |
efdc16c9 | 4260 | |
6f2528d8 | 4261 | if (NILP (replace)) |
ed8e506f | 4262 | { |
6f2528d8 MR |
4263 | insval = call3 (Qformat_decode, |
4264 | Qnil, make_number (inserted), visit); | |
d311d28c PE |
4265 | if (! RANGED_INTEGERP (0, insval, ZV - PT)) |
4266 | wrong_type_argument (intern ("inserted-chars"), insval); | |
6f2528d8 MR |
4267 | inserted = XFASTINT (insval); |
4268 | } | |
4269 | else | |
4270 | { | |
4271 | /* If REPLACE is non-nil and we succeeded in not replacing the | |
6420e80c AS |
4272 | beginning or end of the buffer text with the file's contents, |
4273 | call format-decode with `point' positioned at the beginning | |
fa463103 | 4274 | of the buffer and `inserted' equaling the number of |
6420e80c AS |
4275 | characters in the buffer. Otherwise, format-decode might |
4276 | fail to correctly analyze the beginning or end of the buffer. | |
4277 | Hence we temporarily save `point' and `inserted' here and | |
4278 | restore `point' iff format-decode did not insert or delete | |
4279 | any text. Otherwise we leave `point' at point-min. */ | |
d311d28c PE |
4280 | ptrdiff_t opoint = PT; |
4281 | ptrdiff_t opoint_byte = PT_BYTE; | |
4282 | ptrdiff_t oinserted = ZV - BEGV; | |
4283 | EMACS_INT ochars_modiff = CHARS_MODIFF; | |
1f163f28 MA |
4284 | |
4285 | TEMP_SET_PT_BOTH (BEGV, BEGV_BYTE); | |
6f2528d8 MR |
4286 | insval = call3 (Qformat_decode, |
4287 | Qnil, make_number (oinserted), visit); | |
d311d28c PE |
4288 | if (! RANGED_INTEGERP (0, insval, ZV - PT)) |
4289 | wrong_type_argument (intern ("inserted-chars"), insval); | |
cac4219c MR |
4290 | if (ochars_modiff == CHARS_MODIFF) |
4291 | /* format_decode didn't modify buffer's characters => move | |
4292 | point back to position before inserted text and leave | |
6420e80c | 4293 | value of inserted alone. */ |
6f2528d8 | 4294 | SET_PT_BOTH (opoint, opoint_byte); |
cac4219c MR |
4295 | else |
4296 | /* format_decode modified buffer's characters => consider | |
6420e80c | 4297 | entire buffer changed and leave point at point-min. */ |
cac4219c | 4298 | inserted = XFASTINT (insval); |
ed8e506f | 4299 | } |
efdc16c9 | 4300 | |
6f2528d8 | 4301 | /* For consistency with format-decode call these now iff inserted > 0 |
6420e80c | 4302 | (martin 2007-06-28). */ |
6f2528d8 MR |
4303 | p = Vafter_insert_file_functions; |
4304 | while (CONSP (p)) | |
4305 | { | |
4306 | if (NILP (replace)) | |
4307 | { | |
4308 | insval = call1 (XCAR (p), make_number (inserted)); | |
4309 | if (!NILP (insval)) | |
4310 | { | |
d311d28c PE |
4311 | if (! RANGED_INTEGERP (0, insval, ZV - PT)) |
4312 | wrong_type_argument (intern ("inserted-chars"), insval); | |
6f2528d8 MR |
4313 | inserted = XFASTINT (insval); |
4314 | } | |
4315 | } | |
4316 | else | |
4317 | { | |
6420e80c AS |
4318 | /* For the rationale of this see the comment on |
4319 | format-decode above. */ | |
d311d28c PE |
4320 | ptrdiff_t opoint = PT; |
4321 | ptrdiff_t opoint_byte = PT_BYTE; | |
4322 | ptrdiff_t oinserted = ZV - BEGV; | |
4323 | EMACS_INT ochars_modiff = CHARS_MODIFF; | |
1f163f28 | 4324 | |
6f2528d8 MR |
4325 | TEMP_SET_PT_BOTH (BEGV, BEGV_BYTE); |
4326 | insval = call1 (XCAR (p), make_number (oinserted)); | |
4327 | if (!NILP (insval)) | |
4328 | { | |
d311d28c PE |
4329 | if (! RANGED_INTEGERP (0, insval, ZV - PT)) |
4330 | wrong_type_argument (intern ("inserted-chars"), insval); | |
cac4219c MR |
4331 | if (ochars_modiff == CHARS_MODIFF) |
4332 | /* after_insert_file_functions didn't modify | |
4333 | buffer's characters => move point back to | |
4334 | position before inserted text and leave value of | |
6420e80c | 4335 | inserted alone. */ |
6f2528d8 | 4336 | SET_PT_BOTH (opoint, opoint_byte); |
cac4219c MR |
4337 | else |
4338 | /* after_insert_file_functions did modify buffer's | |
4339 | characters => consider entire buffer changed and | |
6420e80c | 4340 | leave point at point-min. */ |
cac4219c | 4341 | inserted = XFASTINT (insval); |
6f2528d8 MR |
4342 | } |
4343 | } | |
4344 | ||
4345 | QUIT; | |
4346 | p = XCDR (p); | |
ed8e506f | 4347 | } |
efdc16c9 | 4348 | |
6f2528d8 MR |
4349 | if (NILP (visit)) |
4350 | { | |
4b4deea2 | 4351 | BVAR (current_buffer, undo_list) = old_undo; |
6420e80c | 4352 | if (CONSP (old_undo) && inserted != old_inserted) |
6f2528d8 | 4353 | { |
6420e80c AS |
4354 | /* Adjust the last undo record for the size change during |
4355 | the format conversion. */ | |
6f2528d8 | 4356 | Lisp_Object tem = XCAR (old_undo); |
6420e80c AS |
4357 | if (CONSP (tem) && INTEGERP (XCAR (tem)) |
4358 | && INTEGERP (XCDR (tem)) | |
4359 | && XFASTINT (XCDR (tem)) == PT + old_inserted) | |
4360 | XSETCDR (tem, make_number (PT + inserted)); | |
6f2528d8 MR |
4361 | } |
4362 | } | |
6f2528d8 | 4363 | else |
1bc99c9c | 4364 | /* If undo_list was Qt before, keep it that way. |
6420e80c | 4365 | Otherwise start with an empty undo_list. */ |
4b4deea2 | 4366 | BVAR (current_buffer, undo_list) = EQ (old_undo, Qt) ? Qt : Qnil; |
efdc16c9 | 4367 | |
f839df0c | 4368 | unbind_to (count1, Qnil); |
0d420e88 BG |
4369 | } |
4370 | ||
f8569325 | 4371 | if (!NILP (visit) |
d35af63c | 4372 | && EMACS_NSECS (current_buffer->modtime) == NONEXISTENT_MODTIME_NSECS) |
f8569325 DL |
4373 | { |
4374 | /* If visiting nonexistent file, return nil. */ | |
e5e9d610 | 4375 | errno = save_errno; |
f8569325 | 4376 | report_file_error ("Opening input file", Fcons (orig_filename, Qnil)); |
d6a3cc15 RS |
4377 | } |
4378 | ||
1b978129 GM |
4379 | if (read_quit) |
4380 | Fsignal (Qquit, Qnil); | |
4381 | ||
ec7adf26 | 4382 | /* ??? Retval needs to be dealt with in all cases consistently. */ |
a1d2b64a | 4383 | if (NILP (val)) |
b1d1b865 | 4384 | val = Fcons (orig_filename, |
a1d2b64a RS |
4385 | Fcons (make_number (inserted), |
4386 | Qnil)); | |
4387 | ||
4388 | RETURN_UNGCPRO (unbind_to (count, val)); | |
570d7624 | 4389 | } |
7fded690 | 4390 | \f |
f57e2426 | 4391 | static Lisp_Object build_annotations (Lisp_Object, Lisp_Object); |
d6a3cc15 | 4392 | |
199607e4 | 4393 | static Lisp_Object |
971de7fb | 4394 | build_annotations_unwind (Lisp_Object arg) |
6fc6f94b | 4395 | { |
67fbc0cb | 4396 | Vwrite_region_annotation_buffers = arg; |
6fc6f94b RS |
4397 | return Qnil; |
4398 | } | |
4399 | ||
7c82a4a9 SM |
4400 | /* Decide the coding-system to encode the data with. */ |
4401 | ||
c934586d | 4402 | static Lisp_Object |
dd4c5104 DN |
4403 | choose_write_coding_system (Lisp_Object start, Lisp_Object end, Lisp_Object filename, |
4404 | Lisp_Object append, Lisp_Object visit, Lisp_Object lockname, | |
4405 | struct coding_system *coding) | |
7c82a4a9 SM |
4406 | { |
4407 | Lisp_Object val; | |
75421805 | 4408 | Lisp_Object eol_parent = Qnil; |
7c82a4a9 | 4409 | |
6b61353c | 4410 | if (auto_saving |
4b4deea2 TT |
4411 | && NILP (Fstring_equal (BVAR (current_buffer, filename), |
4412 | BVAR (current_buffer, auto_save_file_name)))) | |
75421805 KH |
4413 | { |
4414 | val = Qutf_8_emacs; | |
4415 | eol_parent = Qunix; | |
4416 | } | |
7c82a4a9 | 4417 | else if (!NILP (Vcoding_system_for_write)) |
42b01e1e KH |
4418 | { |
4419 | val = Vcoding_system_for_write; | |
4420 | if (coding_system_require_warning | |
4421 | && !NILP (Ffboundp (Vselect_safe_coding_system_function))) | |
4422 | /* Confirm that VAL can surely encode the current region. */ | |
4423 | val = call5 (Vselect_safe_coding_system_function, | |
4424 | start, end, Fcons (Qt, Fcons (val, Qnil)), | |
4425 | Qnil, filename); | |
4426 | } | |
7c82a4a9 SM |
4427 | else |
4428 | { | |
4429 | /* If the variable `buffer-file-coding-system' is set locally, | |
4430 | it means that the file was read with some kind of code | |
4431 | conversion or the variable is explicitly set by users. We | |
4432 | had better write it out with the same coding system even if | |
4433 | `enable-multibyte-characters' is nil. | |
4434 | ||
4435 | If it is not set locally, we anyway have to convert EOL | |
4436 | format if the default value of `buffer-file-coding-system' | |
4437 | tells that it is not Unix-like (LF only) format. */ | |
4438 | int using_default_coding = 0; | |
4439 | int force_raw_text = 0; | |
4440 | ||
4b4deea2 | 4441 | val = BVAR (current_buffer, buffer_file_coding_system); |
7c82a4a9 SM |
4442 | if (NILP (val) |
4443 | || NILP (Flocal_variable_p (Qbuffer_file_coding_system, Qnil))) | |
4444 | { | |
4445 | val = Qnil; | |
4b4deea2 | 4446 | if (NILP (BVAR (current_buffer, enable_multibyte_characters))) |
7c82a4a9 SM |
4447 | force_raw_text = 1; |
4448 | } | |
efdc16c9 | 4449 | |
7c82a4a9 SM |
4450 | if (NILP (val)) |
4451 | { | |
4452 | /* Check file-coding-system-alist. */ | |
4453 | Lisp_Object args[7], coding_systems; | |
4454 | ||
4455 | args[0] = Qwrite_region; args[1] = start; args[2] = end; | |
4456 | args[3] = filename; args[4] = append; args[5] = visit; | |
4457 | args[6] = lockname; | |
4458 | coding_systems = Ffind_operation_coding_system (7, args); | |
4459 | if (CONSP (coding_systems) && !NILP (XCDR (coding_systems))) | |
4460 | val = XCDR (coding_systems); | |
4461 | } | |
4462 | ||
c934586d | 4463 | if (NILP (val)) |
7c82a4a9 SM |
4464 | { |
4465 | /* If we still have not decided a coding system, use the | |
4466 | default value of buffer-file-coding-system. */ | |
4b4deea2 | 4467 | val = BVAR (current_buffer, buffer_file_coding_system); |
7c82a4a9 SM |
4468 | using_default_coding = 1; |
4469 | } | |
efdc16c9 | 4470 | |
db327c7e KH |
4471 | if (! NILP (val) && ! force_raw_text) |
4472 | { | |
4473 | Lisp_Object spec, attrs; | |
4474 | ||
4475 | CHECK_CODING_SYSTEM_GET_SPEC (val, spec); | |
4476 | attrs = AREF (spec, 0); | |
4477 | if (EQ (CODING_ATTR_TYPE (attrs), Qraw_text)) | |
4478 | force_raw_text = 1; | |
4479 | } | |
4480 | ||
7c82a4a9 SM |
4481 | if (!force_raw_text |
4482 | && !NILP (Ffboundp (Vselect_safe_coding_system_function))) | |
4483 | /* Confirm that VAL can surely encode the current region. */ | |
905a4276 PJ |
4484 | val = call5 (Vselect_safe_coding_system_function, |
4485 | start, end, val, Qnil, filename); | |
7c82a4a9 | 4486 | |
db327c7e KH |
4487 | /* If the decided coding-system doesn't specify end-of-line |
4488 | format, we use that of | |
4489 | `default-buffer-file-coding-system'. */ | |
c934586d | 4490 | if (! using_default_coding |
4b4deea2 | 4491 | && ! NILP (BVAR (&buffer_defaults, buffer_file_coding_system))) |
db327c7e | 4492 | val = (coding_inherit_eol_type |
4b4deea2 | 4493 | (val, BVAR (&buffer_defaults, buffer_file_coding_system))); |
7c82a4a9 | 4494 | |
db327c7e KH |
4495 | /* If we decide not to encode text, use `raw-text' or one of its |
4496 | subsidiaries. */ | |
7c82a4a9 | 4497 | if (force_raw_text) |
db327c7e | 4498 | val = raw_text_coding_system (val); |
7c82a4a9 SM |
4499 | } |
4500 | ||
75421805 | 4501 | val = coding_inherit_eol_type (val, eol_parent); |
c934586d | 4502 | setup_coding_system (val, coding); |
7c82a4a9 | 4503 | |
4b4deea2 | 4504 | if (!STRINGP (start) && !NILP (BVAR (current_buffer, selective_display))) |
7c82a4a9 | 4505 | coding->mode |= CODING_MODE_SELECTIVE_DISPLAY; |
c934586d | 4506 | return val; |
7c82a4a9 SM |
4507 | } |
4508 | ||
a7ca3326 | 4509 | DEFUN ("write-region", Fwrite_region, Swrite_region, 3, 7, |
8c1a1077 PJ |
4510 | "r\nFWrite region to file: \ni\ni\ni\np", |
4511 | doc: /* Write current region into specified file. | |
c2efea25 RS |
4512 | When called from a program, requires three arguments: |
4513 | START, END and FILENAME. START and END are normally buffer positions | |
4514 | specifying the part of the buffer to write. | |
4515 | If START is nil, that means to use the entire buffer contents. | |
4516 | If START is a string, then output that string to the file | |
4517 | instead of any buffer contents; END is ignored. | |
4518 | ||
8c1a1077 PJ |
4519 | Optional fourth argument APPEND if non-nil means |
4520 | append to existing file contents (if any). If it is an integer, | |
4521 | seek to that offset in the file before writing. | |
36e50520 | 4522 | Optional fifth argument VISIT, if t or a string, means |
8c1a1077 PJ |
4523 | set the last-save-file-modtime of buffer to this file's modtime |
4524 | and mark buffer not modified. | |
4525 | If VISIT is a string, it is a second file name; | |
4526 | the output goes to FILENAME, but the buffer is marked as visiting VISIT. | |
4527 | VISIT is also the file name to lock and unlock for clash detection. | |
4528 | If VISIT is neither t nor nil nor a string, | |
5f4e6aa9 | 4529 | that means do not display the \"Wrote file\" message. |
8c1a1077 PJ |
4530 | The optional sixth arg LOCKNAME, if non-nil, specifies the name to |
4531 | use for locking and unlocking, overriding FILENAME and VISIT. | |
4532 | The optional seventh arg MUSTBENEW, if non-nil, insists on a check | |
4533 | for an existing file with the same name. If MUSTBENEW is `excl', | |
4534 | that means to get an error if the file already exists; never overwrite. | |
4535 | If MUSTBENEW is neither nil nor `excl', that means ask for | |
4536 | confirmation before overwriting, but do go ahead and overwrite the file | |
4537 | if the user confirms. | |
8c1a1077 PJ |
4538 | |
4539 | This does code conversion according to the value of | |
4540 | `coding-system-for-write', `buffer-file-coding-system', or | |
4541 | `file-coding-system-alist', and sets the variable | |
aacd8ba1 GM |
4542 | `last-coding-system-used' to the coding system actually used. |
4543 | ||
4544 | This calls `write-region-annotate-functions' at the start, and | |
4545 | `write-region-post-annotation-function' at the end. */) | |
5842a27b | 4546 | (Lisp_Object start, Lisp_Object end, Lisp_Object filename, Lisp_Object append, Lisp_Object visit, Lisp_Object lockname, Lisp_Object mustbenew) |
570d7624 JB |
4547 | { |
4548 | register int desc; | |
4549 | int failure; | |
6bbd7a29 | 4550 | int save_errno = 0; |
5976c3fe | 4551 | const char *fn; |
570d7624 | 4552 | struct stat st; |
d311d28c | 4553 | ptrdiff_t count = SPECPDL_INDEX (); |
6fc6f94b | 4554 | int count1; |
3eac9910 | 4555 | Lisp_Object handler; |
4ad827c5 | 4556 | Lisp_Object visit_file; |
65b7d3e7 | 4557 | Lisp_Object annotations; |
b1d1b865 | 4558 | Lisp_Object encoded_filename; |
d3a67486 SM |
4559 | int visiting = (EQ (visit, Qt) || STRINGP (visit)); |
4560 | int quietly = !NILP (visit); | |
7204a979 | 4561 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4, gcpro5; |
6fc6f94b | 4562 | struct buffer *given_buffer; |
6fdaa9a0 | 4563 | struct coding_system coding; |
570d7624 | 4564 | |
d3a67486 | 4565 | if (current_buffer->base_buffer && visiting) |
95385625 RS |
4566 | error ("Cannot do file visiting in an indirect buffer"); |
4567 | ||
561cb8e1 | 4568 | if (!NILP (start) && !STRINGP (start)) |
570d7624 JB |
4569 | validate_region (&start, &end); |
4570 | ||
95c1c901 | 4571 | visit_file = Qnil; |
59fac292 | 4572 | GCPRO5 (start, filename, visit, visit_file, lockname); |
b56567b5 | 4573 | |
570d7624 | 4574 | filename = Fexpand_file_name (filename, Qnil); |
de1d0127 | 4575 | |
236a12f2 | 4576 | if (!NILP (mustbenew) && !EQ (mustbenew, Qexcl)) |
b8b29dc9 | 4577 | barf_or_query_if_file_exists (filename, "overwrite", 1, 0, 1); |
de1d0127 | 4578 | |
561cb8e1 | 4579 | if (STRINGP (visit)) |
e5176bae | 4580 | visit_file = Fexpand_file_name (visit, Qnil); |
4ad827c5 RS |
4581 | else |
4582 | visit_file = filename; | |
4583 | ||
7204a979 RS |
4584 | if (NILP (lockname)) |
4585 | lockname = visit_file; | |
4586 | ||
65b7d3e7 RS |
4587 | annotations = Qnil; |
4588 | ||
32f4334d RS |
4589 | /* If the file name has special constructs in it, |
4590 | call the corresponding file handler. */ | |
49307295 | 4591 | handler = Ffind_file_name_handler (filename, Qwrite_region); |
b56ad927 | 4592 | /* If FILENAME has no handler, see if VISIT has one. */ |
93c30b5f | 4593 | if (NILP (handler) && STRINGP (visit)) |
199607e4 | 4594 | handler = Ffind_file_name_handler (visit, Qwrite_region); |
3eac9910 | 4595 | |
32f4334d RS |
4596 | if (!NILP (handler)) |
4597 | { | |
32f4334d | 4598 | Lisp_Object val; |
51cf6d37 RS |
4599 | val = call6 (handler, Qwrite_region, start, end, |
4600 | filename, append, visit); | |
32f4334d | 4601 | |
d6a3cc15 | 4602 | if (visiting) |
32f4334d | 4603 | { |
95385625 | 4604 | SAVE_MODIFF = MODIFF; |
4b4deea2 TT |
4605 | XSETFASTINT (BVAR (current_buffer, save_length), Z - BEG); |
4606 | BVAR (current_buffer, filename) = visit_file; | |
32f4334d | 4607 | } |
09121adc | 4608 | UNGCPRO; |
32f4334d RS |
4609 | return val; |
4610 | } | |
4611 | ||
4a38de71 KH |
4612 | record_unwind_protect (save_restriction_restore, save_restriction_save ()); |
4613 | ||
561cb8e1 RS |
4614 | /* Special kludge to simplify auto-saving. */ |
4615 | if (NILP (start)) | |
4616 | { | |
6b3d752c SM |
4617 | /* Do it later, so write-region-annotate-function can work differently |
4618 | if we save "the buffer" vs "a region". | |
4619 | This is useful in tar-mode. --Stef | |
2acfd7ae | 4620 | XSETFASTINT (start, BEG); |
6b3d752c | 4621 | XSETFASTINT (end, Z); */ |
4a38de71 | 4622 | Fwiden (); |
561cb8e1 RS |
4623 | } |
4624 | ||
67fbc0cb CY |
4625 | record_unwind_protect (build_annotations_unwind, |
4626 | Vwrite_region_annotation_buffers); | |
4627 | Vwrite_region_annotation_buffers = Fcons (Fcurrent_buffer (), Qnil); | |
aed13378 | 4628 | count1 = SPECPDL_INDEX (); |
6fc6f94b RS |
4629 | |
4630 | given_buffer = current_buffer; | |
bf3428a1 RS |
4631 | |
4632 | if (!STRINGP (start)) | |
236a12f2 | 4633 | { |
bf3428a1 RS |
4634 | annotations = build_annotations (start, end); |
4635 | ||
4636 | if (current_buffer != given_buffer) | |
4637 | { | |
4638 | XSETFASTINT (start, BEGV); | |
4639 | XSETFASTINT (end, ZV); | |
4640 | } | |
236a12f2 SM |
4641 | } |
4642 | ||
6b3d752c SM |
4643 | if (NILP (start)) |
4644 | { | |
4645 | XSETFASTINT (start, BEGV); | |
4646 | XSETFASTINT (end, ZV); | |
4647 | } | |
4648 | ||
236a12f2 SM |
4649 | UNGCPRO; |
4650 | ||
4651 | GCPRO5 (start, filename, annotations, visit_file, lockname); | |
4652 | ||
59fac292 SM |
4653 | /* Decide the coding-system to encode the data with. |
4654 | We used to make this choice before calling build_annotations, but that | |
4655 | leads to problems when a write-annotate-function takes care of | |
4656 | unsavable chars (as was the case with X-Symbol). */ | |
c934586d KH |
4657 | Vlast_coding_system_used |
4658 | = choose_write_coding_system (start, end, filename, | |
4659 | append, visit, lockname, &coding); | |
d6a3cc15 | 4660 | |
570d7624 JB |
4661 | #ifdef CLASH_DETECTION |
4662 | if (!auto_saving) | |
67fbc0cb | 4663 | lock_file (lockname); |
570d7624 JB |
4664 | #endif /* CLASH_DETECTION */ |
4665 | ||
b1d1b865 RS |
4666 | encoded_filename = ENCODE_FILE (filename); |
4667 | ||
5976c3fe | 4668 | fn = SSDATA (encoded_filename); |
570d7624 | 4669 | desc = -1; |
265a9e55 | 4670 | if (!NILP (append)) |
5e570b75 | 4671 | #ifdef DOS_NT |
05c65251 | 4672 | desc = emacs_open (fn, O_WRONLY | O_BINARY, 0); |
5e570b75 | 4673 | #else /* not DOS_NT */ |
68c45bf0 | 4674 | desc = emacs_open (fn, O_WRONLY, 0); |
5e570b75 | 4675 | #endif /* not DOS_NT */ |
570d7624 | 4676 | |
b1d1b865 | 4677 | if (desc < 0 && (NILP (append) || errno == ENOENT)) |
5e570b75 | 4678 | #ifdef DOS_NT |
68c45bf0 | 4679 | desc = emacs_open (fn, |
05c65251 | 4680 | O_WRONLY | O_CREAT | O_BINARY |
95522746 | 4681 | | (EQ (mustbenew, Qexcl) ? O_EXCL : O_TRUNC), |
68c45bf0 | 4682 | S_IREAD | S_IWRITE); |
5e570b75 | 4683 | #else /* not DOS_NT */ |
68c45bf0 | 4684 | desc = emacs_open (fn, O_WRONLY | O_TRUNC | O_CREAT |
7c752c80 | 4685 | | (EQ (mustbenew, Qexcl) ? O_EXCL : 0), |
68c45bf0 | 4686 | auto_saving ? auto_save_mode_bits : 0666); |
5e570b75 | 4687 | #endif /* not DOS_NT */ |
570d7624 JB |
4688 | |
4689 | if (desc < 0) | |
4690 | { | |
4691 | #ifdef CLASH_DETECTION | |
4692 | save_errno = errno; | |
7204a979 | 4693 | if (!auto_saving) unlock_file (lockname); |
570d7624 JB |
4694 | errno = save_errno; |
4695 | #endif /* CLASH_DETECTION */ | |
43fb7d9a | 4696 | UNGCPRO; |
570d7624 JB |
4697 | report_file_error ("Opening output file", Fcons (filename, Qnil)); |
4698 | } | |
4699 | ||
4700 | record_unwind_protect (close_file_unwind, make_number (desc)); | |
4701 | ||
c1c4693e | 4702 | if (!NILP (append) && !NILP (Ffile_regular_p (filename))) |
43fb7d9a | 4703 | { |
728f8f0a | 4704 | off_t ret; |
efdc16c9 | 4705 | |
43fb7d9a | 4706 | if (NUMBERP (append)) |
e69dafad | 4707 | ret = emacs_lseek (desc, XINT (append), SEEK_CUR); |
43fb7d9a | 4708 | else |
e69dafad | 4709 | ret = lseek (desc, 0, SEEK_END); |
43fb7d9a DL |
4710 | if (ret < 0) |
4711 | { | |
570d7624 | 4712 | #ifdef CLASH_DETECTION |
e5e9d610 | 4713 | save_errno = errno; |
43fb7d9a | 4714 | if (!auto_saving) unlock_file (lockname); |
e5e9d610 | 4715 | errno = save_errno; |
570d7624 | 4716 | #endif /* CLASH_DETECTION */ |
43fb7d9a DL |
4717 | UNGCPRO; |
4718 | report_file_error ("Lseek error", Fcons (filename, Qnil)); | |
4719 | } | |
4720 | } | |
efdc16c9 | 4721 | |
43fb7d9a | 4722 | UNGCPRO; |
570d7624 | 4723 | |
570d7624 JB |
4724 | failure = 0; |
4725 | immediate_quit = 1; | |
4726 | ||
561cb8e1 | 4727 | if (STRINGP (start)) |
570d7624 | 4728 | { |
d5db4077 | 4729 | failure = 0 > a_write (desc, start, 0, SCHARS (start), |
ce51c54c | 4730 | &annotations, &coding); |
570d7624 JB |
4731 | save_errno = errno; |
4732 | } | |
4733 | else if (XINT (start) != XINT (end)) | |
4734 | { | |
db327c7e KH |
4735 | failure = 0 > a_write (desc, Qnil, |
4736 | XINT (start), XINT (end) - XINT (start), | |
4737 | &annotations, &coding); | |
4738 | save_errno = errno; | |
69f6e679 RS |
4739 | } |
4740 | else | |
4741 | { | |
4742 | /* If file was empty, still need to write the annotations */ | |
c8a6d68a | 4743 | coding.mode |= CODING_MODE_LAST_BLOCK; |
ce51c54c | 4744 | failure = 0 > a_write (desc, Qnil, XINT (end), 0, &annotations, &coding); |
6fdaa9a0 KH |
4745 | save_errno = errno; |
4746 | } | |
4747 | ||
c8a6d68a KH |
4748 | if (CODING_REQUIRE_FLUSHING (&coding) |
4749 | && !(coding.mode & CODING_MODE_LAST_BLOCK) | |
1354debd | 4750 | && ! failure) |
6fdaa9a0 KH |
4751 | { |
4752 | /* We have to flush out a data. */ | |
c8a6d68a | 4753 | coding.mode |= CODING_MODE_LAST_BLOCK; |
db327c7e | 4754 | failure = 0 > e_write (desc, Qnil, 1, 1, &coding); |
69f6e679 | 4755 | save_errno = errno; |
570d7624 JB |
4756 | } |
4757 | ||
4758 | immediate_quit = 0; | |
4759 | ||
6e23c83e | 4760 | #ifdef HAVE_FSYNC |
570d7624 JB |
4761 | /* Note fsync appears to change the modtime on BSD4.2 (both vax and sun). |
4762 | Disk full in NFS may be reported here. */ | |
1daffa1c RS |
4763 | /* mib says that closing the file will try to write as fast as NFS can do |
4764 | it, and that means the fsync here is not crucial for autosave files. */ | |
ccf61795 | 4765 | if (!auto_saving && !write_region_inhibit_fsync && fsync (desc) < 0) |
cb33c142 | 4766 | { |
6cff77fd AS |
4767 | /* If fsync fails with EINTR, don't treat that as serious. Also |
4768 | ignore EINVAL which happens when fsync is not supported on this | |
4769 | file. */ | |
4770 | if (errno != EINTR && errno != EINVAL) | |
cb33c142 KH |
4771 | failure = 1, save_errno = errno; |
4772 | } | |
570d7624 JB |
4773 | #endif |
4774 | ||
570d7624 | 4775 | /* NFS can report a write failure now. */ |
68c45bf0 | 4776 | if (emacs_close (desc) < 0) |
570d7624 JB |
4777 | failure = 1, save_errno = errno; |
4778 | ||
570d7624 | 4779 | stat (fn, &st); |
67fbc0cb | 4780 | |
6fc6f94b RS |
4781 | /* Discard the unwind protect for close_file_unwind. */ |
4782 | specpdl_ptr = specpdl + count1; | |
67fbc0cb CY |
4783 | |
4784 | /* Call write-region-post-annotation-function. */ | |
294fa707 | 4785 | while (CONSP (Vwrite_region_annotation_buffers)) |
67fbc0cb CY |
4786 | { |
4787 | Lisp_Object buf = XCAR (Vwrite_region_annotation_buffers); | |
4788 | if (!NILP (Fbuffer_live_p (buf))) | |
4789 | { | |
4790 | Fset_buffer (buf); | |
4791 | if (FUNCTIONP (Vwrite_region_post_annotation_function)) | |
4792 | call0 (Vwrite_region_post_annotation_function); | |
4793 | } | |
4794 | Vwrite_region_annotation_buffers | |
4795 | = XCDR (Vwrite_region_annotation_buffers); | |
4796 | } | |
4797 | ||
4798 | unbind_to (count, Qnil); | |
570d7624 JB |
4799 | |
4800 | #ifdef CLASH_DETECTION | |
4801 | if (!auto_saving) | |
7204a979 | 4802 | unlock_file (lockname); |
570d7624 JB |
4803 | #endif /* CLASH_DETECTION */ |
4804 | ||
4805 | /* Do this before reporting IO error | |
4806 | to avoid a "file has changed on disk" warning on | |
4807 | next attempt to save. */ | |
d6a3cc15 | 4808 | if (visiting) |
58b963f7 | 4809 | { |
d35af63c | 4810 | current_buffer->modtime = get_stat_mtime (&st); |
58b963f7 SM |
4811 | current_buffer->modtime_size = st.st_size; |
4812 | } | |
570d7624 JB |
4813 | |
4814 | if (failure) | |
d5db4077 | 4815 | error ("IO error writing %s: %s", SDATA (filename), |
68c45bf0 | 4816 | emacs_strerror (save_errno)); |
570d7624 | 4817 | |
d6a3cc15 | 4818 | if (visiting) |
570d7624 | 4819 | { |
95385625 | 4820 | SAVE_MODIFF = MODIFF; |
4b4deea2 TT |
4821 | XSETFASTINT (BVAR (current_buffer, save_length), Z - BEG); |
4822 | BVAR (current_buffer, filename) = visit_file; | |
f4226e89 | 4823 | update_mode_lines++; |
570d7624 | 4824 | } |
d6a3cc15 | 4825 | else if (quietly) |
6b61353c KH |
4826 | { |
4827 | if (auto_saving | |
4b4deea2 TT |
4828 | && ! NILP (Fstring_equal (BVAR (current_buffer, filename), |
4829 | BVAR (current_buffer, auto_save_file_name)))) | |
6b61353c KH |
4830 | SAVE_MODIFF = MODIFF; |
4831 | ||
4832 | return Qnil; | |
4833 | } | |
570d7624 JB |
4834 | |
4835 | if (!auto_saving) | |
6b61353c | 4836 | message_with_string ((INTEGERP (append) |
0c328a0e RS |
4837 | ? "Updated %s" |
4838 | : ! NILP (append) | |
4839 | ? "Added to %s" | |
4840 | : "Wrote %s"), | |
4841 | visit_file, 1); | |
570d7624 JB |
4842 | |
4843 | return Qnil; | |
4844 | } | |
ec7adf26 | 4845 | \f |
dd4c5104 | 4846 | Lisp_Object merge (Lisp_Object, Lisp_Object, Lisp_Object); |
d6a3cc15 RS |
4847 | |
4848 | DEFUN ("car-less-than-car", Fcar_less_than_car, Scar_less_than_car, 2, 2, 0, | |
8c1a1077 | 4849 | doc: /* Return t if (car A) is numerically less than (car B). */) |
5842a27b | 4850 | (Lisp_Object a, Lisp_Object b) |
d6a3cc15 RS |
4851 | { |
4852 | return Flss (Fcar (a), Fcar (b)); | |
4853 | } | |
4854 | ||
4855 | /* Build the complete list of annotations appropriate for writing out | |
4856 | the text between START and END, by calling all the functions in | |
6fc6f94b RS |
4857 | write-region-annotate-functions and merging the lists they return. |
4858 | If one of these functions switches to a different buffer, we assume | |
4859 | that buffer contains altered text. Therefore, the caller must | |
4860 | make sure to restore the current buffer in all cases, | |
4861 | as save-excursion would do. */ | |
d6a3cc15 RS |
4862 | |
4863 | static Lisp_Object | |
971de7fb | 4864 | build_annotations (Lisp_Object start, Lisp_Object end) |
d6a3cc15 RS |
4865 | { |
4866 | Lisp_Object annotations; | |
4867 | Lisp_Object p, res; | |
4868 | struct gcpro gcpro1, gcpro2; | |
0a20b684 | 4869 | Lisp_Object original_buffer; |
bd235610 | 4870 | int i, used_global = 0; |
0a20b684 RS |
4871 | |
4872 | XSETBUFFER (original_buffer, current_buffer); | |
d6a3cc15 RS |
4873 | |
4874 | annotations = Qnil; | |
4875 | p = Vwrite_region_annotate_functions; | |
4876 | GCPRO2 (annotations, p); | |
28c3eb5a | 4877 | while (CONSP (p)) |
d6a3cc15 | 4878 | { |
6fc6f94b | 4879 | struct buffer *given_buffer = current_buffer; |
bd235610 SM |
4880 | if (EQ (Qt, XCAR (p)) && !used_global) |
4881 | { /* Use the global value of the hook. */ | |
4882 | Lisp_Object arg[2]; | |
4883 | used_global = 1; | |
4884 | arg[0] = Fdefault_value (Qwrite_region_annotate_functions); | |
4885 | arg[1] = XCDR (p); | |
4886 | p = Fappend (2, arg); | |
4887 | continue; | |
4888 | } | |
6fc6f94b | 4889 | Vwrite_region_annotations_so_far = annotations; |
28c3eb5a | 4890 | res = call2 (XCAR (p), start, end); |
6fc6f94b RS |
4891 | /* If the function makes a different buffer current, |
4892 | assume that means this buffer contains altered text to be output. | |
4893 | Reset START and END from the buffer bounds | |
4894 | and discard all previous annotations because they should have | |
4895 | been dealt with by this function. */ | |
4896 | if (current_buffer != given_buffer) | |
4897 | { | |
67fbc0cb CY |
4898 | Vwrite_region_annotation_buffers |
4899 | = Fcons (Fcurrent_buffer (), | |
4900 | Vwrite_region_annotation_buffers); | |
3cf29f61 RS |
4901 | XSETFASTINT (start, BEGV); |
4902 | XSETFASTINT (end, ZV); | |
6fc6f94b RS |
4903 | annotations = Qnil; |
4904 | } | |
d6a3cc15 RS |
4905 | Flength (res); /* Check basic validity of return value */ |
4906 | annotations = merge (annotations, res, Qcar_less_than_car); | |
28c3eb5a | 4907 | p = XCDR (p); |
d6a3cc15 | 4908 | } |
0d420e88 BG |
4909 | |
4910 | /* Now do the same for annotation functions implied by the file-format */ | |
4b4deea2 TT |
4911 | if (auto_saving && (!EQ (BVAR (current_buffer, auto_save_file_format), Qt))) |
4912 | p = BVAR (current_buffer, auto_save_file_format); | |
0d420e88 | 4913 | else |
4b4deea2 | 4914 | p = BVAR (current_buffer, file_format); |
28c3eb5a | 4915 | for (i = 0; CONSP (p); p = XCDR (p), ++i) |
0d420e88 BG |
4916 | { |
4917 | struct buffer *given_buffer = current_buffer; | |
efdc16c9 | 4918 | |
0d420e88 | 4919 | Vwrite_region_annotations_so_far = annotations; |
532ed661 GM |
4920 | |
4921 | /* Value is either a list of annotations or nil if the function | |
4922 | has written annotations to a temporary buffer, which is now | |
4923 | current. */ | |
28c3eb5a | 4924 | res = call5 (Qformat_annotate_function, XCAR (p), start, end, |
532ed661 | 4925 | original_buffer, make_number (i)); |
0d420e88 BG |
4926 | if (current_buffer != given_buffer) |
4927 | { | |
3cf29f61 RS |
4928 | XSETFASTINT (start, BEGV); |
4929 | XSETFASTINT (end, ZV); | |
0d420e88 BG |
4930 | annotations = Qnil; |
4931 | } | |
efdc16c9 | 4932 | |
532ed661 GM |
4933 | if (CONSP (res)) |
4934 | annotations = merge (annotations, res, Qcar_less_than_car); | |
0d420e88 | 4935 | } |
6fdaa9a0 | 4936 | |
236a12f2 SM |
4937 | UNGCPRO; |
4938 | return annotations; | |
4939 | } | |
4940 | ||
ec7adf26 | 4941 | \f |
ce51c54c KH |
4942 | /* Write to descriptor DESC the NCHARS chars starting at POS of STRING. |
4943 | If STRING is nil, POS is the character position in the current buffer. | |
d6a3cc15 | 4944 | Intersperse with them the annotations from *ANNOT |
ce51c54c | 4945 | which fall within the range of POS to POS + NCHARS, |
d6a3cc15 RS |
4946 | each at its appropriate position. |
4947 | ||
ec7adf26 RS |
4948 | We modify *ANNOT by discarding elements as we use them up. |
4949 | ||
d6a3cc15 RS |
4950 | The return value is negative in case of system call failure. */ |
4951 | ||
ec7adf26 | 4952 | static int |
d311d28c PE |
4953 | a_write (int desc, Lisp_Object string, ptrdiff_t pos, |
4954 | register ptrdiff_t nchars, Lisp_Object *annot, | |
8a2cbd72 | 4955 | struct coding_system *coding) |
d6a3cc15 RS |
4956 | { |
4957 | Lisp_Object tem; | |
d311d28c PE |
4958 | ptrdiff_t nextpos; |
4959 | ptrdiff_t lastpos = pos + nchars; | |
d6a3cc15 | 4960 | |
eb15aa18 | 4961 | while (NILP (*annot) || CONSP (*annot)) |
d6a3cc15 RS |
4962 | { |
4963 | tem = Fcar_safe (Fcar (*annot)); | |
ce51c54c | 4964 | nextpos = pos - 1; |
ec7adf26 | 4965 | if (INTEGERP (tem)) |
ce51c54c | 4966 | nextpos = XFASTINT (tem); |
ec7adf26 RS |
4967 | |
4968 | /* If there are no more annotations in this range, | |
4969 | output the rest of the range all at once. */ | |
ce51c54c KH |
4970 | if (! (nextpos >= pos && nextpos <= lastpos)) |
4971 | return e_write (desc, string, pos, lastpos, coding); | |
ec7adf26 RS |
4972 | |
4973 | /* Output buffer text up to the next annotation's position. */ | |
ce51c54c | 4974 | if (nextpos > pos) |
d6a3cc15 | 4975 | { |
055a28c9 | 4976 | if (0 > e_write (desc, string, pos, nextpos, coding)) |
d6a3cc15 | 4977 | return -1; |
ce51c54c | 4978 | pos = nextpos; |
d6a3cc15 | 4979 | } |
ec7adf26 | 4980 | /* Output the annotation. */ |
d6a3cc15 RS |
4981 | tem = Fcdr (Fcar (*annot)); |
4982 | if (STRINGP (tem)) | |
4983 | { | |
d5db4077 | 4984 | if (0 > e_write (desc, tem, 0, SCHARS (tem), coding)) |
d6a3cc15 RS |
4985 | return -1; |
4986 | } | |
4987 | *annot = Fcdr (*annot); | |
4988 | } | |
dfcf069d | 4989 | return 0; |
d6a3cc15 RS |
4990 | } |
4991 | ||
6fdaa9a0 | 4992 | |
ce51c54c KH |
4993 | /* Write text in the range START and END into descriptor DESC, |
4994 | encoding them with coding system CODING. If STRING is nil, START | |
4995 | and END are character positions of the current buffer, else they | |
4996 | are indexes to the string STRING. */ | |
ec7adf26 RS |
4997 | |
4998 | static int | |
d311d28c | 4999 | e_write (int desc, Lisp_Object string, ptrdiff_t start, ptrdiff_t end, |
8a2cbd72 | 5000 | struct coding_system *coding) |
570d7624 | 5001 | { |
ce51c54c KH |
5002 | if (STRINGP (string)) |
5003 | { | |
db327c7e | 5004 | start = 0; |
8f924df7 | 5005 | end = SCHARS (string); |
ce51c54c | 5006 | } |
570d7624 | 5007 | |
6fdaa9a0 KH |
5008 | /* We used to have a code for handling selective display here. But, |
5009 | now it is handled within encode_coding. */ | |
01ca97a2 KH |
5010 | |
5011 | while (start < end) | |
570d7624 | 5012 | { |
01ca97a2 | 5013 | if (STRINGP (string)) |
6ad568dd | 5014 | { |
01ca97a2 KH |
5015 | coding->src_multibyte = SCHARS (string) < SBYTES (string); |
5016 | if (CODING_REQUIRE_ENCODING (coding)) | |
5017 | { | |
5018 | encode_coding_object (coding, string, | |
5019 | start, string_char_to_byte (string, start), | |
5020 | end, string_char_to_byte (string, end), Qt); | |
5021 | } | |
5022 | else | |
5023 | { | |
5024 | coding->dst_object = string; | |
5025 | coding->consumed_char = SCHARS (string); | |
5026 | coding->produced = SBYTES (string); | |
5027 | } | |
6ad568dd | 5028 | } |
db327c7e | 5029 | else |
6ad568dd | 5030 | { |
d311d28c PE |
5031 | ptrdiff_t start_byte = CHAR_TO_BYTE (start); |
5032 | ptrdiff_t end_byte = CHAR_TO_BYTE (end); | |
b4132433 | 5033 | |
01ca97a2 KH |
5034 | coding->src_multibyte = (end - start) < (end_byte - start_byte); |
5035 | if (CODING_REQUIRE_ENCODING (coding)) | |
5036 | { | |
5037 | encode_coding_object (coding, Fcurrent_buffer (), | |
5038 | start, start_byte, end, end_byte, Qt); | |
5039 | } | |
5040 | else | |
5041 | { | |
5042 | coding->dst_object = Qnil; | |
5043 | coding->dst_pos_byte = start_byte; | |
5044 | if (start >= GPT || end <= GPT) | |
5045 | { | |
5046 | coding->consumed_char = end - start; | |
5047 | coding->produced = end_byte - start_byte; | |
5048 | } | |
5049 | else | |
5050 | { | |
5051 | coding->consumed_char = GPT - start; | |
5052 | coding->produced = GPT_BYTE - start_byte; | |
5053 | } | |
5054 | } | |
c185d744 | 5055 | } |
01ca97a2 KH |
5056 | |
5057 | if (coding->produced > 0) | |
c185d744 | 5058 | { |
01ca97a2 KH |
5059 | coding->produced -= |
5060 | emacs_write (desc, | |
5061 | STRINGP (coding->dst_object) | |
42a5b22f PE |
5062 | ? SSDATA (coding->dst_object) |
5063 | : (char *) BYTE_POS_ADDR (coding->dst_pos_byte), | |
01ca97a2 KH |
5064 | coding->produced); |
5065 | ||
5066 | if (coding->produced) | |
5067 | return -1; | |
570d7624 | 5068 | } |
01ca97a2 | 5069 | start += coding->consumed_char; |
c185d744 KH |
5070 | } |
5071 | ||
5072 | return 0; | |
570d7624 | 5073 | } |
ec7adf26 | 5074 | \f |
a7ca3326 | 5075 | DEFUN ("verify-visited-file-modtime", Fverify_visited_file_modtime, |
ec1b9b17 | 5076 | Sverify_visited_file_modtime, 0, 1, 0, |
8c1a1077 | 5077 | doc: /* Return t if last mod time of BUF's visited file matches what BUF records. |
6b61353c | 5078 | This means that the file has not been changed since it was visited or saved. |
ec1b9b17 | 5079 | If BUF is omitted or nil, it defaults to the current buffer. |
6b61353c | 5080 | See Info node `(elisp)Modification Time' for more details. */) |
5842a27b | 5081 | (Lisp_Object buf) |
570d7624 JB |
5082 | { |
5083 | struct buffer *b; | |
5084 | struct stat st; | |
32f4334d | 5085 | Lisp_Object handler; |
b1d1b865 | 5086 | Lisp_Object filename; |
d35af63c | 5087 | EMACS_TIME mtime, diff, one_second; |
570d7624 | 5088 | |
ec1b9b17 GM |
5089 | if (NILP (buf)) |
5090 | b = current_buffer; | |
5091 | else | |
5092 | { | |
5093 | CHECK_BUFFER (buf); | |
5094 | b = XBUFFER (buf); | |
5095 | } | |
570d7624 | 5096 | |
4b4deea2 | 5097 | if (!STRINGP (BVAR (b, filename))) return Qt; |
d35af63c | 5098 | if (EMACS_NSECS (b->modtime) == UNKNOWN_MODTIME_NSECS) return Qt; |
570d7624 | 5099 | |
32f4334d RS |
5100 | /* If the file name has special constructs in it, |
5101 | call the corresponding file handler. */ | |
4b4deea2 | 5102 | handler = Ffind_file_name_handler (BVAR (b, filename), |
49307295 | 5103 | Qverify_visited_file_modtime); |
32f4334d | 5104 | if (!NILP (handler)) |
09121adc | 5105 | return call2 (handler, Qverify_visited_file_modtime, buf); |
32f4334d | 5106 | |
4b4deea2 | 5107 | filename = ENCODE_FILE (BVAR (b, filename)); |
b1d1b865 | 5108 | |
dbeed9a6 PE |
5109 | mtime = (stat (SSDATA (filename), &st) == 0 |
5110 | ? get_stat_mtime (&st) | |
f0941253 | 5111 | : time_error_value (errno)); |
d35af63c PE |
5112 | if ((EMACS_TIME_EQ (mtime, b->modtime) |
5113 | /* If both exist, accept them if they are off by one second. */ | |
5114 | || (EMACS_TIME_VALID_P (mtime) && EMACS_TIME_VALID_P (b->modtime) | |
5115 | && ((EMACS_TIME_LT (mtime, b->modtime) | |
5116 | ? EMACS_SUB_TIME (diff, b->modtime, mtime) | |
5117 | : EMACS_SUB_TIME (diff, mtime, b->modtime)), | |
5118 | EMACS_SET_SECS_NSECS (one_second, 1, 0), | |
5119 | EMACS_TIME_LE (diff, one_second)))) | |
58b963f7 SM |
5120 | && (st.st_size == b->modtime_size |
5121 | || b->modtime_size < 0)) | |
570d7624 JB |
5122 | return Qt; |
5123 | return Qnil; | |
5124 | } | |
5125 | ||
5126 | DEFUN ("clear-visited-file-modtime", Fclear_visited_file_modtime, | |
8c1a1077 PJ |
5127 | Sclear_visited_file_modtime, 0, 0, 0, |
5128 | doc: /* Clear out records of last mod time of visited file. | |
5129 | Next attempt to save will certainly not complain of a discrepancy. */) | |
5842a27b | 5130 | (void) |
570d7624 | 5131 | { |
d35af63c | 5132 | EMACS_SET_SECS_NSECS (current_buffer->modtime, 0, UNKNOWN_MODTIME_NSECS); |
58b963f7 | 5133 | current_buffer->modtime_size = -1; |
570d7624 JB |
5134 | return Qnil; |
5135 | } | |
5136 | ||
f5d5eccf | 5137 | DEFUN ("visited-file-modtime", Fvisited_file_modtime, |
8c1a1077 PJ |
5138 | Svisited_file_modtime, 0, 0, 0, |
5139 | doc: /* Return the current buffer's recorded visited file modification time. | |
d35af63c | 5140 | The value is a list of the form (HIGH LOW USEC PSEC), like the time values that |
1c4d7f3d LMI |
5141 | `file-attributes' returns. If the current buffer has no recorded file |
5142 | modification time, this function returns 0. If the visited file | |
9d1d6e68 | 5143 | doesn't exist, HIGH will be -1. |
6b61353c | 5144 | See Info node `(elisp)Modification Time' for more details. */) |
5842a27b | 5145 | (void) |
f5d5eccf | 5146 | { |
d35af63c | 5147 | if (EMACS_NSECS (current_buffer->modtime) < 0) |
73ff9d42 | 5148 | return make_number (0); |
d35af63c | 5149 | return make_lisp_time (current_buffer->modtime); |
f5d5eccf RS |
5150 | } |
5151 | ||
570d7624 | 5152 | DEFUN ("set-visited-file-modtime", Fset_visited_file_modtime, |
8c1a1077 PJ |
5153 | Sset_visited_file_modtime, 0, 1, 0, |
5154 | doc: /* Update buffer's recorded modification time from the visited file's time. | |
5155 | Useful if the buffer was not read from the file normally | |
5156 | or if the file itself has been changed for some known benign reason. | |
5157 | An argument specifies the modification time value to use | |
5158 | \(instead of that of the visited file), in the form of a list | |
d35af63c | 5159 | \(HIGH LOW USEC PSEC) as returned by `current-time'. */) |
5842a27b | 5160 | (Lisp_Object time_list) |
570d7624 | 5161 | { |
f5d5eccf | 5162 | if (!NILP (time_list)) |
58b963f7 | 5163 | { |
31571fd7 | 5164 | current_buffer->modtime = lisp_time_argument (time_list); |
58b963f7 SM |
5165 | current_buffer->modtime_size = -1; |
5166 | } | |
f5d5eccf RS |
5167 | else |
5168 | { | |
5169 | register Lisp_Object filename; | |
5170 | struct stat st; | |
5171 | Lisp_Object handler; | |
570d7624 | 5172 | |
4b4deea2 | 5173 | filename = Fexpand_file_name (BVAR (current_buffer, filename), Qnil); |
32f4334d | 5174 | |
f5d5eccf RS |
5175 | /* If the file name has special constructs in it, |
5176 | call the corresponding file handler. */ | |
49307295 | 5177 | handler = Ffind_file_name_handler (filename, Qset_visited_file_modtime); |
f5d5eccf | 5178 | if (!NILP (handler)) |
caf3c431 | 5179 | /* The handler can find the file name the same way we did. */ |
76c881b0 | 5180 | return call2 (handler, Qset_visited_file_modtime, Qnil); |
b1d1b865 RS |
5181 | |
5182 | filename = ENCODE_FILE (filename); | |
5183 | ||
42a5b22f | 5184 | if (stat (SSDATA (filename), &st) >= 0) |
58b963f7 | 5185 | { |
d35af63c | 5186 | current_buffer->modtime = get_stat_mtime (&st); |
58b963f7 SM |
5187 | current_buffer->modtime_size = st.st_size; |
5188 | } | |
f5d5eccf | 5189 | } |
570d7624 JB |
5190 | |
5191 | return Qnil; | |
5192 | } | |
5193 | \f | |
f14b7e14 | 5194 | static Lisp_Object |
f839df0c | 5195 | auto_save_error (Lisp_Object error_val) |
570d7624 | 5196 | { |
d7f31e22 GM |
5197 | Lisp_Object args[3], msg; |
5198 | int i, nbytes; | |
5199 | struct gcpro gcpro1; | |
dfc22242 KS |
5200 | char *msgbuf; |
5201 | USE_SAFE_ALLOCA; | |
efdc16c9 | 5202 | |
ca730bf0 CY |
5203 | auto_save_error_occurred = 1; |
5204 | ||
385ed61f | 5205 | ring_bell (XFRAME (selected_frame)); |
efdc16c9 | 5206 | |
d7f31e22 | 5207 | args[0] = build_string ("Auto-saving %s: %s"); |
4b4deea2 | 5208 | args[1] = BVAR (current_buffer, name); |
f839df0c | 5209 | args[2] = Ferror_message_string (error_val); |
d7f31e22 GM |
5210 | msg = Fformat (3, args); |
5211 | GCPRO1 (msg); | |
d5db4077 | 5212 | nbytes = SBYTES (msg); |
dfc22242 | 5213 | SAFE_ALLOCA (msgbuf, char *, nbytes); |
72af86bd | 5214 | memcpy (msgbuf, SDATA (msg), nbytes); |
d7f31e22 GM |
5215 | |
5216 | for (i = 0; i < 3; ++i) | |
5217 | { | |
5218 | if (i == 0) | |
dfc22242 | 5219 | message2 (msgbuf, nbytes, STRING_MULTIBYTE (msg)); |
d7f31e22 | 5220 | else |
dfc22242 | 5221 | message2_nolog (msgbuf, nbytes, STRING_MULTIBYTE (msg)); |
d7f31e22 GM |
5222 | Fsleep_for (make_number (1), Qnil); |
5223 | } | |
5224 | ||
e01f7773 | 5225 | SAFE_FREE (); |
d7f31e22 | 5226 | UNGCPRO; |
570d7624 JB |
5227 | return Qnil; |
5228 | } | |
5229 | ||
f14b7e14 | 5230 | static Lisp_Object |
971de7fb | 5231 | auto_save_1 (void) |
570d7624 | 5232 | { |
570d7624 | 5233 | struct stat st; |
d4a42098 KS |
5234 | Lisp_Object modes; |
5235 | ||
5236 | auto_save_mode_bits = 0666; | |
570d7624 JB |
5237 | |
5238 | /* Get visited file's mode to become the auto save file's mode. */ | |
4b4deea2 | 5239 | if (! NILP (BVAR (current_buffer, filename))) |
d4a42098 | 5240 | { |
4b4deea2 | 5241 | if (stat (SSDATA (BVAR (current_buffer, filename)), &st) >= 0) |
d4a42098 | 5242 | /* But make sure we can overwrite it later! */ |
18c52557 | 5243 | auto_save_mode_bits = (st.st_mode | 0600) & 0777; |
4b4deea2 | 5244 | else if ((modes = Ffile_modes (BVAR (current_buffer, filename)), |
d4a42098 KS |
5245 | INTEGERP (modes))) |
5246 | /* Remote files don't cooperate with stat. */ | |
18c52557 | 5247 | auto_save_mode_bits = (XINT (modes) | 0600) & 0777; |
d4a42098 | 5248 | } |
570d7624 JB |
5249 | |
5250 | return | |
4b4deea2 | 5251 | Fwrite_region (Qnil, Qnil, BVAR (current_buffer, auto_save_file_name), Qnil, |
699b53bc CY |
5252 | NILP (Vauto_save_visited_file_name) ? Qlambda : Qt, |
5253 | Qnil, Qnil); | |
570d7624 JB |
5254 | } |
5255 | ||
e54d3b5d | 5256 | static Lisp_Object |
971de7fb | 5257 | do_auto_save_unwind (Lisp_Object arg) /* used as unwind-protect function */ |
410ed5c3 | 5258 | |
e54d3b5d | 5259 | { |
fff7e982 | 5260 | FILE *stream = (FILE *) XSAVE_VALUE (arg)->pointer; |
3be3c08e | 5261 | auto_saving = 0; |
fff7e982 | 5262 | if (stream != NULL) |
aab12958 YM |
5263 | { |
5264 | BLOCK_INPUT; | |
5265 | fclose (stream); | |
5266 | UNBLOCK_INPUT; | |
5267 | } | |
e54d3b5d RS |
5268 | return Qnil; |
5269 | } | |
5270 | ||
a8c828be | 5271 | static Lisp_Object |
971de7fb | 5272 | do_auto_save_unwind_1 (Lisp_Object value) /* used as unwind-protect function */ |
410ed5c3 | 5273 | |
a8c828be RS |
5274 | { |
5275 | minibuffer_auto_raise = XINT (value); | |
5276 | return Qnil; | |
5277 | } | |
5278 | ||
5794dd61 | 5279 | static Lisp_Object |
971de7fb | 5280 | do_auto_save_make_dir (Lisp_Object dir) |
5794dd61 | 5281 | { |
09450bae | 5282 | Lisp_Object result; |
26816cbf | 5283 | |
09450bae PE |
5284 | auto_saving_dir_umask = 077; |
5285 | result = call2 (Qmake_directory, dir, Qt); | |
5286 | auto_saving_dir_umask = 0; | |
5287 | return result; | |
5794dd61 RS |
5288 | } |
5289 | ||
5290 | static Lisp_Object | |
971de7fb | 5291 | do_auto_save_eh (Lisp_Object ignore) |
5794dd61 | 5292 | { |
09450bae | 5293 | auto_saving_dir_umask = 0; |
5794dd61 RS |
5294 | return Qnil; |
5295 | } | |
5296 | ||
a7ca3326 | 5297 | DEFUN ("do-auto-save", Fdo_auto_save, Sdo_auto_save, 0, 2, "", |
8c1a1077 PJ |
5298 | doc: /* Auto-save all buffers that need it. |
5299 | This is all buffers that have auto-saving enabled | |
5300 | and are changed since last auto-saved. | |
5301 | Auto-saving writes the buffer into a file | |
5302 | so that your editing is not lost if the system crashes. | |
5303 | This file is not the file you visited; that changes only when you save. | |
5304 | Normally we run the normal hook `auto-save-hook' before saving. | |
5305 | ||
5306 | A non-nil NO-MESSAGE argument means do not print any message if successful. | |
5307 | A non-nil CURRENT-ONLY argument means save only current buffer. */) | |
5842a27b | 5308 | (Lisp_Object no_message, Lisp_Object current_only) |
570d7624 JB |
5309 | { |
5310 | struct buffer *old = current_buffer, *b; | |
dee091a3 | 5311 | Lisp_Object tail, buf, hook; |
570d7624 | 5312 | int auto_saved = 0; |
f14b1c68 | 5313 | int do_handled_files; |
ff4c9993 | 5314 | Lisp_Object oquit; |
fff7e982 | 5315 | FILE *stream = NULL; |
d311d28c | 5316 | ptrdiff_t count = SPECPDL_INDEX (); |
a8c828be | 5317 | int orig_minibuffer_auto_raise = minibuffer_auto_raise; |
5794dd61 | 5318 | int old_message_p = 0; |
d57563b6 | 5319 | struct gcpro gcpro1, gcpro2; |
38da540d RS |
5320 | |
5321 | if (max_specpdl_size < specpdl_size + 40) | |
5322 | max_specpdl_size = specpdl_size + 40; | |
5323 | ||
5324 | if (minibuf_level) | |
5325 | no_message = Qt; | |
5326 | ||
5794dd61 RS |
5327 | if (NILP (no_message)) |
5328 | { | |
5329 | old_message_p = push_message (); | |
5330 | record_unwind_protect (pop_message_unwind, Qnil); | |
5331 | } | |
efdc16c9 | 5332 | |
ff4c9993 RS |
5333 | /* Ordinarily don't quit within this function, |
5334 | but don't make it impossible to quit (in case we get hung in I/O). */ | |
5335 | oquit = Vquit_flag; | |
5336 | Vquit_flag = Qnil; | |
570d7624 JB |
5337 | |
5338 | /* No GCPRO needed, because (when it matters) all Lisp_Object variables | |
5339 | point to non-strings reached from Vbuffer_alist. */ | |
5340 | ||
dee091a3 JD |
5341 | hook = intern ("auto-save-hook"); |
5342 | Frun_hooks (1, &hook); | |
570d7624 | 5343 | |
e54d3b5d RS |
5344 | if (STRINGP (Vauto_save_list_file_name)) |
5345 | { | |
0894672f | 5346 | Lisp_Object listfile; |
efdc16c9 | 5347 | |
258fd2cb | 5348 | listfile = Fexpand_file_name (Vauto_save_list_file_name, Qnil); |
0894672f GM |
5349 | |
5350 | /* Don't try to create the directory when shutting down Emacs, | |
5351 | because creating the directory might signal an error, and | |
5352 | that would leave Emacs in a strange state. */ | |
5353 | if (!NILP (Vrun_hooks)) | |
5354 | { | |
5355 | Lisp_Object dir; | |
d57563b6 RS |
5356 | dir = Qnil; |
5357 | GCPRO2 (dir, listfile); | |
0894672f GM |
5358 | dir = Ffile_name_directory (listfile); |
5359 | if (NILP (Ffile_directory_p (dir))) | |
5794dd61 | 5360 | internal_condition_case_1 (do_auto_save_make_dir, |
09450bae | 5361 | dir, Qt, |
5794dd61 | 5362 | do_auto_save_eh); |
d57563b6 | 5363 | UNGCPRO; |
0894672f | 5364 | } |
efdc16c9 | 5365 | |
42a5b22f | 5366 | stream = fopen (SSDATA (listfile), "w"); |
1b335d29 | 5367 | } |
199607e4 | 5368 | |
fff7e982 KS |
5369 | record_unwind_protect (do_auto_save_unwind, |
5370 | make_save_value (stream, 0)); | |
a8c828be RS |
5371 | record_unwind_protect (do_auto_save_unwind_1, |
5372 | make_number (minibuffer_auto_raise)); | |
5373 | minibuffer_auto_raise = 0; | |
3be3c08e | 5374 | auto_saving = 1; |
ca730bf0 | 5375 | auto_save_error_occurred = 0; |
3be3c08e | 5376 | |
6b61353c KH |
5377 | /* On first pass, save all files that don't have handlers. |
5378 | On second pass, save all files that do have handlers. | |
5379 | ||
5380 | If Emacs is crashing, the handlers may tweak what is causing | |
5381 | Emacs to crash in the first place, and it would be a shame if | |
5382 | Emacs failed to autosave perfectly ordinary files because it | |
5383 | couldn't handle some ange-ftp'd file. */ | |
5384 | ||
f14b1c68 | 5385 | for (do_handled_files = 0; do_handled_files < 2; do_handled_files++) |
8e50cc2d | 5386 | for (tail = Vbuffer_alist; CONSP (tail); tail = XCDR (tail)) |
f14b1c68 | 5387 | { |
03699b14 | 5388 | buf = XCDR (XCAR (tail)); |
f14b1c68 | 5389 | b = XBUFFER (buf); |
199607e4 | 5390 | |
e54d3b5d | 5391 | /* Record all the buffers that have auto save mode |
258fd2cb RS |
5392 | in the special file that lists them. For each of these buffers, |
5393 | Record visited name (if any) and auto save name. */ | |
4b4deea2 | 5394 | if (STRINGP (BVAR (b, auto_save_file_name)) |
1b335d29 | 5395 | && stream != NULL && do_handled_files == 0) |
e54d3b5d | 5396 | { |
aab12958 | 5397 | BLOCK_INPUT; |
4b4deea2 | 5398 | if (!NILP (BVAR (b, filename))) |
258fd2cb | 5399 | { |
4b4deea2 TT |
5400 | fwrite (SDATA (BVAR (b, filename)), 1, |
5401 | SBYTES (BVAR (b, filename)), stream); | |
258fd2cb | 5402 | } |
1b335d29 | 5403 | putc ('\n', stream); |
4b4deea2 TT |
5404 | fwrite (SDATA (BVAR (b, auto_save_file_name)), 1, |
5405 | SBYTES (BVAR (b, auto_save_file_name)), stream); | |
1b335d29 | 5406 | putc ('\n', stream); |
aab12958 | 5407 | UNBLOCK_INPUT; |
e54d3b5d | 5408 | } |
17857782 | 5409 | |
f14b1c68 JB |
5410 | if (!NILP (current_only) |
5411 | && b != current_buffer) | |
5412 | continue; | |
e54d3b5d | 5413 | |
95385625 RS |
5414 | /* Don't auto-save indirect buffers. |
5415 | The base buffer takes care of it. */ | |
5416 | if (b->base_buffer) | |
5417 | continue; | |
5418 | ||
f14b1c68 JB |
5419 | /* Check for auto save enabled |
5420 | and file changed since last auto save | |
5421 | and file changed since last real save. */ | |
4b4deea2 | 5422 | if (STRINGP (BVAR (b, auto_save_file_name)) |
95385625 | 5423 | && BUF_SAVE_MODIFF (b) < BUF_MODIFF (b) |
0b5397c2 | 5424 | && BUF_AUTOSAVE_MODIFF (b) < BUF_MODIFF (b) |
82c2d839 | 5425 | /* -1 means we've turned off autosaving for a while--see below. */ |
4b4deea2 | 5426 | && XINT (BVAR (b, save_length)) >= 0 |
f14b1c68 | 5427 | && (do_handled_files |
4b4deea2 | 5428 | || NILP (Ffind_file_name_handler (BVAR (b, auto_save_file_name), |
49307295 | 5429 | Qwrite_region)))) |
f14b1c68 | 5430 | { |
b60247d9 RS |
5431 | EMACS_TIME before_time, after_time; |
5432 | ||
5433 | EMACS_GET_TIME (before_time); | |
5434 | ||
5435 | /* If we had a failure, don't try again for 20 minutes. */ | |
d311d28c | 5436 | if (b->auto_save_failure_time > 0 |
b60247d9 RS |
5437 | && EMACS_SECS (before_time) - b->auto_save_failure_time < 1200) |
5438 | continue; | |
5439 | ||
090101cf CY |
5440 | set_buffer_internal (b); |
5441 | if (NILP (Vauto_save_include_big_deletions) | |
4b4deea2 | 5442 | && (XFASTINT (BVAR (b, save_length)) * 10 |
4be941e3 | 5443 | > (BUF_Z (b) - BUF_BEG (b)) * 13) |
f14b1c68 JB |
5444 | /* A short file is likely to change a large fraction; |
5445 | spare the user annoying messages. */ | |
4b4deea2 | 5446 | && XFASTINT (BVAR (b, save_length)) > 5000 |
f14b1c68 | 5447 | /* These messages are frequent and annoying for `*mail*'. */ |
4b4deea2 | 5448 | && !EQ (BVAR (b, filename), Qnil) |
f14b1c68 JB |
5449 | && NILP (no_message)) |
5450 | { | |
5451 | /* It has shrunk too much; turn off auto-saving here. */ | |
a8c828be | 5452 | minibuffer_auto_raise = orig_minibuffer_auto_raise; |
fd91d0d4 | 5453 | message_with_string ("Buffer %s has shrunk a lot; auto save disabled in that buffer until next real save", |
4b4deea2 | 5454 | BVAR (b, name), 1); |
a8c828be | 5455 | minibuffer_auto_raise = 0; |
82c2d839 RS |
5456 | /* Turn off auto-saving until there's a real save, |
5457 | and prevent any more warnings. */ | |
4b4deea2 | 5458 | XSETINT (BVAR (b, save_length), -1); |
f14b1c68 JB |
5459 | Fsleep_for (make_number (1), Qnil); |
5460 | continue; | |
5461 | } | |
f14b1c68 JB |
5462 | if (!auto_saved && NILP (no_message)) |
5463 | message1 ("Auto-saving..."); | |
5464 | internal_condition_case (auto_save_1, Qt, auto_save_error); | |
5465 | auto_saved++; | |
0b5397c2 | 5466 | BUF_AUTOSAVE_MODIFF (b) = BUF_MODIFF (b); |
4b4deea2 | 5467 | XSETFASTINT (BVAR (current_buffer, save_length), Z - BEG); |
f14b1c68 | 5468 | set_buffer_internal (old); |
b60247d9 RS |
5469 | |
5470 | EMACS_GET_TIME (after_time); | |
5471 | ||
5472 | /* If auto-save took more than 60 seconds, | |
5473 | assume it was an NFS failure that got a timeout. */ | |
5474 | if (EMACS_SECS (after_time) - EMACS_SECS (before_time) > 60) | |
5475 | b->auto_save_failure_time = EMACS_SECS (after_time); | |
f14b1c68 JB |
5476 | } |
5477 | } | |
570d7624 | 5478 | |
b67f2ca5 RS |
5479 | /* Prevent another auto save till enough input events come in. */ |
5480 | record_auto_save (); | |
570d7624 | 5481 | |
17857782 | 5482 | if (auto_saved && NILP (no_message)) |
f05b275b | 5483 | { |
5794dd61 | 5484 | if (old_message_p) |
31f3d831 | 5485 | { |
5794dd61 RS |
5486 | /* If we are going to restore an old message, |
5487 | give time to read ours. */ | |
83f8d903 | 5488 | sit_for (make_number (1), 0, 0); |
c71106e5 | 5489 | restore_message (); |
31f3d831 | 5490 | } |
ca730bf0 | 5491 | else if (!auto_save_error_occurred) |
31e31a15 CY |
5492 | /* Don't overwrite the error message if an error occurred. |
5493 | If we displayed a message and then restored a state | |
5794dd61 | 5494 | with no message, leave a "done" message on the screen. */ |
f05b275b KH |
5495 | message1 ("Auto-saving...done"); |
5496 | } | |
570d7624 | 5497 | |
ff4c9993 RS |
5498 | Vquit_flag = oquit; |
5499 | ||
5794dd61 | 5500 | /* This restores the message-stack status. */ |
e54d3b5d | 5501 | unbind_to (count, Qnil); |
570d7624 JB |
5502 | return Qnil; |
5503 | } | |
5504 | ||
5505 | DEFUN ("set-buffer-auto-saved", Fset_buffer_auto_saved, | |
8c1a1077 PJ |
5506 | Sset_buffer_auto_saved, 0, 0, 0, |
5507 | doc: /* Mark current buffer as auto-saved with its current text. | |
5508 | No auto-save file will be written until the buffer changes again. */) | |
5842a27b | 5509 | (void) |
570d7624 | 5510 | { |
0b5397c2 SM |
5511 | /* FIXME: This should not be called in indirect buffers, since |
5512 | they're not autosaved. */ | |
5513 | BUF_AUTOSAVE_MODIFF (current_buffer) = MODIFF; | |
4b4deea2 | 5514 | XSETFASTINT (BVAR (current_buffer, save_length), Z - BEG); |
d311d28c | 5515 | current_buffer->auto_save_failure_time = 0; |
b60247d9 RS |
5516 | return Qnil; |
5517 | } | |
5518 | ||
5519 | DEFUN ("clear-buffer-auto-save-failure", Fclear_buffer_auto_save_failure, | |
8c1a1077 PJ |
5520 | Sclear_buffer_auto_save_failure, 0, 0, 0, |
5521 | doc: /* Clear any record of a recent auto-save failure in the current buffer. */) | |
5842a27b | 5522 | (void) |
b60247d9 | 5523 | { |
d311d28c | 5524 | current_buffer->auto_save_failure_time = 0; |
570d7624 JB |
5525 | return Qnil; |
5526 | } | |
5527 | ||
5528 | DEFUN ("recent-auto-save-p", Frecent_auto_save_p, Srecent_auto_save_p, | |
8c1a1077 | 5529 | 0, 0, 0, |
68780e2a RS |
5530 | doc: /* Return t if current buffer has been auto-saved recently. |
5531 | More precisely, if it has been auto-saved since last read from or saved | |
5532 | in the visited file. If the buffer has no visited file, | |
5533 | then any auto-save counts as "recent". */) | |
5842a27b | 5534 | (void) |
570d7624 | 5535 | { |
0b5397c2 SM |
5536 | /* FIXME: maybe we should return nil for indirect buffers since |
5537 | they're never autosaved. */ | |
5538 | return (SAVE_MODIFF < BUF_AUTOSAVE_MODIFF (current_buffer) ? Qt : Qnil); | |
570d7624 JB |
5539 | } |
5540 | \f | |
5541 | /* Reading and completing file names */ | |
6e710ae5 | 5542 | |
88208bb8 JD |
5543 | DEFUN ("next-read-file-uses-dialog-p", Fnext_read_file_uses_dialog_p, |
5544 | Snext_read_file_uses_dialog_p, 0, 0, 0, | |
5545 | doc: /* Return t if a call to `read-file-name' will use a dialog. | |
5546 | The return value is only relevant for a call to `read-file-name' that happens | |
1a0de25c | 5547 | before any other event (mouse or keypress) is handled. */) |
5842a27b | 5548 | (void) |
88208bb8 | 5549 | { |
9e2a2647 | 5550 | #if defined (USE_MOTIF) || defined (HAVE_NTGUI) || defined (USE_GTK) |
88208bb8 JD |
5551 | if ((NILP (last_nonmenu_event) || CONSP (last_nonmenu_event)) |
5552 | && use_dialog_box | |
5553 | && use_file_dialog | |
5554 | && have_menus_p ()) | |
5555 | return Qt; | |
5556 | #endif | |
5557 | return Qnil; | |
5558 | } | |
d4a42098 | 5559 | |
dbd50d4b | 5560 | Lisp_Object |
971de7fb | 5561 | Fread_file_name (Lisp_Object prompt, Lisp_Object dir, Lisp_Object default_filename, Lisp_Object mustmatch, Lisp_Object initial, Lisp_Object predicate) |
570d7624 | 5562 | { |
fd4ead52 | 5563 | struct gcpro gcpro1; |
dbd50d4b | 5564 | Lisp_Object args[7]; |
a79485af | 5565 | |
71e1f69d | 5566 | GCPRO1 (default_filename); |
dbd50d4b SM |
5567 | args[0] = intern ("read-file-name"); |
5568 | args[1] = prompt; | |
5569 | args[2] = dir; | |
5570 | args[3] = default_filename; | |
5571 | args[4] = mustmatch; | |
5572 | args[5] = initial; | |
5573 | args[6] = predicate; | |
5574 | RETURN_UNGCPRO (Ffuncall (7, args)); | |
570d7624 | 5575 | } |
9c856db9 | 5576 | |
570d7624 | 5577 | \f |
dfcf069d | 5578 | void |
971de7fb | 5579 | syms_of_fileio (void) |
570d7624 | 5580 | { |
cd3520a4 JB |
5581 | DEFSYM (Qoperations, "operations"); |
5582 | DEFSYM (Qexpand_file_name, "expand-file-name"); | |
5583 | DEFSYM (Qsubstitute_in_file_name, "substitute-in-file-name"); | |
5584 | DEFSYM (Qdirectory_file_name, "directory-file-name"); | |
5585 | DEFSYM (Qfile_name_directory, "file-name-directory"); | |
5586 | DEFSYM (Qfile_name_nondirectory, "file-name-nondirectory"); | |
5587 | DEFSYM (Qunhandled_file_name_directory, "unhandled-file-name-directory"); | |
5588 | DEFSYM (Qfile_name_as_directory, "file-name-as-directory"); | |
5589 | DEFSYM (Qcopy_file, "copy-file"); | |
5590 | DEFSYM (Qmake_directory_internal, "make-directory-internal"); | |
5591 | DEFSYM (Qmake_directory, "make-directory"); | |
5592 | DEFSYM (Qdelete_directory_internal, "delete-directory-internal"); | |
5593 | DEFSYM (Qdelete_file, "delete-file"); | |
5594 | DEFSYM (Qrename_file, "rename-file"); | |
5595 | DEFSYM (Qadd_name_to_file, "add-name-to-file"); | |
5596 | DEFSYM (Qmake_symbolic_link, "make-symbolic-link"); | |
5597 | DEFSYM (Qfile_exists_p, "file-exists-p"); | |
5598 | DEFSYM (Qfile_executable_p, "file-executable-p"); | |
5599 | DEFSYM (Qfile_readable_p, "file-readable-p"); | |
5600 | DEFSYM (Qfile_writable_p, "file-writable-p"); | |
5601 | DEFSYM (Qfile_symlink_p, "file-symlink-p"); | |
5602 | DEFSYM (Qaccess_file, "access-file"); | |
5603 | DEFSYM (Qfile_directory_p, "file-directory-p"); | |
5604 | DEFSYM (Qfile_regular_p, "file-regular-p"); | |
5605 | DEFSYM (Qfile_accessible_directory_p, "file-accessible-directory-p"); | |
5606 | DEFSYM (Qfile_modes, "file-modes"); | |
5607 | DEFSYM (Qset_file_modes, "set-file-modes"); | |
5608 | DEFSYM (Qset_file_times, "set-file-times"); | |
5609 | DEFSYM (Qfile_selinux_context, "file-selinux-context"); | |
5610 | DEFSYM (Qset_file_selinux_context, "set-file-selinux-context"); | |
5611 | DEFSYM (Qfile_newer_than_file_p, "file-newer-than-file-p"); | |
5612 | DEFSYM (Qinsert_file_contents, "insert-file-contents"); | |
5613 | DEFSYM (Qwrite_region, "write-region"); | |
5614 | DEFSYM (Qverify_visited_file_modtime, "verify-visited-file-modtime"); | |
5615 | DEFSYM (Qset_visited_file_modtime, "set-visited-file-modtime"); | |
5616 | DEFSYM (Qauto_save_coding, "auto-save-coding"); | |
5617 | ||
5618 | DEFSYM (Qfile_name_history, "file-name-history"); | |
642ef245 | 5619 | Fset (Qfile_name_history, Qnil); |
15c65264 | 5620 | |
cd3520a4 JB |
5621 | DEFSYM (Qfile_error, "file-error"); |
5622 | DEFSYM (Qfile_already_exists, "file-already-exists"); | |
5623 | DEFSYM (Qfile_date_error, "file-date-error"); | |
5624 | DEFSYM (Qexcl, "excl"); | |
570d7624 | 5625 | |
29208e82 | 5626 | DEFVAR_LISP ("file-name-coding-system", Vfile_name_coding_system, |
fb7ada5f | 5627 | doc: /* Coding system for encoding file names. |
346ebf53 | 5628 | If it is nil, `default-file-name-coding-system' (which see) is used. */); |
b1d1b865 RS |
5629 | Vfile_name_coding_system = Qnil; |
5630 | ||
cd913586 | 5631 | DEFVAR_LISP ("default-file-name-coding-system", |
29208e82 | 5632 | Vdefault_file_name_coding_system, |
8c1a1077 | 5633 | doc: /* Default coding system for encoding file names. |
346ebf53 | 5634 | This variable is used only when `file-name-coding-system' is nil. |
8c1a1077 | 5635 | |
346ebf53 | 5636 | This variable is set/changed by the command `set-language-environment'. |
8c1a1077 | 5637 | User should not set this variable manually, |
346ebf53 | 5638 | instead use `file-name-coding-system' to get a constant encoding |
8c1a1077 | 5639 | of file names regardless of the current language environment. */); |
cd913586 KH |
5640 | Vdefault_file_name_coding_system = Qnil; |
5641 | ||
cd3520a4 JB |
5642 | DEFSYM (Qformat_decode, "format-decode"); |
5643 | DEFSYM (Qformat_annotate_function, "format-annotate-function"); | |
5644 | DEFSYM (Qafter_insert_file_set_coding, "after-insert-file-set-coding"); | |
5645 | DEFSYM (Qcar_less_than_car, "car-less-than-car"); | |
d6a3cc15 | 5646 | |
570d7624 | 5647 | Fput (Qfile_error, Qerror_conditions, |
d67b4f80 | 5648 | Fpurecopy (list2 (Qfile_error, Qerror))); |
570d7624 | 5649 | Fput (Qfile_error, Qerror_message, |
2a0213a6 | 5650 | build_pure_c_string ("File error")); |
570d7624 JB |
5651 | |
5652 | Fput (Qfile_already_exists, Qerror_conditions, | |
d67b4f80 | 5653 | Fpurecopy (list3 (Qfile_already_exists, Qfile_error, Qerror))); |
570d7624 | 5654 | Fput (Qfile_already_exists, Qerror_message, |
2a0213a6 | 5655 | build_pure_c_string ("File already exists")); |
570d7624 | 5656 | |
c0b7b21c | 5657 | Fput (Qfile_date_error, Qerror_conditions, |
d67b4f80 | 5658 | Fpurecopy (list3 (Qfile_date_error, Qfile_error, Qerror))); |
c0b7b21c | 5659 | Fput (Qfile_date_error, Qerror_message, |
2a0213a6 | 5660 | build_pure_c_string ("Cannot set file date")); |
c0b7b21c | 5661 | |
29208e82 | 5662 | DEFVAR_LISP ("file-name-handler-alist", Vfile_name_handler_alist, |
a59225b1 CY |
5663 | doc: /* Alist of elements (REGEXP . HANDLER) for file names handled specially. |
5664 | If a file name matches REGEXP, all I/O on that file is done by calling | |
5665 | HANDLER. If a file name matches more than one handler, the handler | |
5666 | whose match starts last in the file name gets precedence. The | |
5667 | function `find-file-name-handler' checks this list for a handler for | |
5668 | its argument. | |
5669 | ||
5670 | HANDLER should be a function. The first argument given to it is the | |
5671 | name of the I/O primitive to be handled; the remaining arguments are | |
5672 | the arguments that were passed to that primitive. For example, if you | |
5673 | do (file-exists-p FILENAME) and FILENAME is handled by HANDLER, then | |
5674 | HANDLER is called like this: | |
5675 | ||
5676 | (funcall HANDLER 'file-exists-p FILENAME) | |
5677 | ||
5678 | Note that HANDLER must be able to handle all I/O primitives; if it has | |
5679 | nothing special to do for a primitive, it should reinvoke the | |
5680 | primitive to handle the operation \"the usual way\". | |
5681 | See Info node `(elisp)Magic File Names' for more details. */); | |
09121adc RS |
5682 | Vfile_name_handler_alist = Qnil; |
5683 | ||
0414b394 | 5684 | DEFVAR_LISP ("set-auto-coding-function", |
29208e82 | 5685 | Vset_auto_coding_function, |
8c1a1077 PJ |
5686 | doc: /* If non-nil, a function to call to decide a coding system of file. |
5687 | Two arguments are passed to this function: the file name | |
5688 | and the length of a file contents following the point. | |
5689 | This function should return a coding system to decode the file contents. | |
5690 | It should check the file name against `auto-coding-alist'. | |
5691 | If no coding system is decided, it should check a coding system | |
5692 | specified in the heading lines with the format: | |
5693 | -*- ... coding: CODING-SYSTEM; ... -*- | |
5694 | or local variable spec of the tailing lines with `coding:' tag. */); | |
0414b394 | 5695 | Vset_auto_coding_function = Qnil; |
c9e82392 | 5696 | |
29208e82 | 5697 | DEFVAR_LISP ("after-insert-file-functions", Vafter_insert_file_functions, |
8c1a1077 | 5698 | doc: /* A list of functions to be called at the end of `insert-file-contents'. |
0cf9f5b5 RS |
5699 | Each is passed one argument, the number of characters inserted, |
5700 | with point at the start of the inserted text. Each function | |
5701 | should leave point the same, and return the new character count. | |
cf6d2357 RS |
5702 | If `insert-file-contents' is intercepted by a handler from |
5703 | `file-name-handler-alist', that handler is responsible for calling the | |
5704 | functions in `after-insert-file-functions' if appropriate. */); | |
d6a3cc15 RS |
5705 | Vafter_insert_file_functions = Qnil; |
5706 | ||
29208e82 | 5707 | DEFVAR_LISP ("write-region-annotate-functions", Vwrite_region_annotate_functions, |
8c1a1077 PJ |
5708 | doc: /* A list of functions to be called at the start of `write-region'. |
5709 | Each is passed two arguments, START and END as for `write-region'. | |
5710 | These are usually two numbers but not always; see the documentation | |
5711 | for `write-region'. The function should return a list of pairs | |
5712 | of the form (POSITION . STRING), consisting of strings to be effectively | |
5713 | inserted at the specified positions of the file being written (1 means to | |
5714 | insert before the first byte written). The POSITIONs must be sorted into | |
67fbc0cb CY |
5715 | increasing order. |
5716 | ||
5717 | If there are several annotation functions, the lists returned by these | |
5718 | functions are merged destructively. As each annotation function runs, | |
5719 | the variable `write-region-annotations-so-far' contains a list of all | |
5720 | annotations returned by previous annotation functions. | |
5721 | ||
5722 | An annotation function can return with a different buffer current. | |
5723 | Doing so removes the annotations returned by previous functions, and | |
5724 | resets START and END to `point-min' and `point-max' of the new buffer. | |
5725 | ||
5726 | After `write-region' completes, Emacs calls the function stored in | |
5727 | `write-region-post-annotation-function', once for each buffer that was | |
5728 | current when building the annotations (i.e., at least once), with that | |
5729 | buffer current. */); | |
d6a3cc15 | 5730 | Vwrite_region_annotate_functions = Qnil; |
cd3520a4 | 5731 | DEFSYM (Qwrite_region_annotate_functions, "write-region-annotate-functions"); |
d6a3cc15 | 5732 | |
67fbc0cb | 5733 | DEFVAR_LISP ("write-region-post-annotation-function", |
29208e82 | 5734 | Vwrite_region_post_annotation_function, |
67fbc0cb CY |
5735 | doc: /* Function to call after `write-region' completes. |
5736 | The function is called with no arguments. If one or more of the | |
5737 | annotation functions in `write-region-annotate-functions' changed the | |
5738 | current buffer, the function stored in this variable is called for | |
5739 | each of those additional buffers as well, in addition to the original | |
5740 | buffer. The relevant buffer is current during each function call. */); | |
5741 | Vwrite_region_post_annotation_function = Qnil; | |
5742 | staticpro (&Vwrite_region_annotation_buffers); | |
5743 | ||
6fc6f94b | 5744 | DEFVAR_LISP ("write-region-annotations-so-far", |
29208e82 | 5745 | Vwrite_region_annotations_so_far, |
8c1a1077 PJ |
5746 | doc: /* When an annotation function is called, this holds the previous annotations. |
5747 | These are the annotations made by other annotation functions | |
5748 | that were already called. See also `write-region-annotate-functions'. */); | |
6fc6f94b RS |
5749 | Vwrite_region_annotations_so_far = Qnil; |
5750 | ||
29208e82 | 5751 | DEFVAR_LISP ("inhibit-file-name-handlers", Vinhibit_file_name_handlers, |
8c1a1077 PJ |
5752 | doc: /* A list of file name handlers that temporarily should not be used. |
5753 | This applies only to the operation `inhibit-file-name-operation'. */); | |
82c2d839 RS |
5754 | Vinhibit_file_name_handlers = Qnil; |
5755 | ||
29208e82 | 5756 | DEFVAR_LISP ("inhibit-file-name-operation", Vinhibit_file_name_operation, |
8c1a1077 | 5757 | doc: /* The operation for which `inhibit-file-name-handlers' is applicable. */); |
a65970a0 RS |
5758 | Vinhibit_file_name_operation = Qnil; |
5759 | ||
29208e82 | 5760 | DEFVAR_LISP ("auto-save-list-file-name", Vauto_save_list_file_name, |
8c1a1077 PJ |
5761 | doc: /* File name in which we write a list of all auto save file names. |
5762 | This variable is initialized automatically from `auto-save-list-file-prefix' | |
5763 | shortly after Emacs reads your `.emacs' file, if you have not yet given it | |
5764 | a non-nil value. */); | |
e54d3b5d RS |
5765 | Vauto_save_list_file_name = Qnil; |
5766 | ||
29208e82 | 5767 | DEFVAR_LISP ("auto-save-visited-file-name", Vauto_save_visited_file_name, |
699b53bc CY |
5768 | doc: /* Non-nil says auto-save a buffer in the file it is visiting, when practical. |
5769 | Normally auto-save files are written under other names. */); | |
5770 | Vauto_save_visited_file_name = Qnil; | |
5771 | ||
29208e82 | 5772 | DEFVAR_LISP ("auto-save-include-big-deletions", Vauto_save_include_big_deletions, |
090101cf CY |
5773 | doc: /* If non-nil, auto-save even if a large part of the text is deleted. |
5774 | If nil, deleting a substantial portion of the text disables auto-save | |
5775 | in the buffer; this is the default behavior, because the auto-save | |
5776 | file is usually more useful if it contains the deleted text. */); | |
5777 | Vauto_save_include_big_deletions = Qnil; | |
5778 | ||
ccf61795 | 5779 | #ifdef HAVE_FSYNC |
29208e82 | 5780 | DEFVAR_BOOL ("write-region-inhibit-fsync", write_region_inhibit_fsync, |
fb7ada5f | 5781 | doc: /* Non-nil means don't call fsync in `write-region'. |
e3f509dd RF |
5782 | This variable affects calls to `write-region' as well as save commands. |
5783 | A non-nil value may result in data loss! */); | |
ccf61795 RF |
5784 | write_region_inhibit_fsync = 0; |
5785 | #endif | |
5786 | ||
29208e82 | 5787 | DEFVAR_BOOL ("delete-by-moving-to-trash", delete_by_moving_to_trash, |
6cf29fe8 | 5788 | doc: /* Specifies whether to use the system's trash can. |
f1a5d776 CY |
5789 | When non-nil, certain file deletion commands use the function |
5790 | `move-file-to-trash' instead of deleting files outright. | |
5791 | This includes interactive calls to `delete-file' and | |
5792 | `delete-directory' and the Dired deletion commands. */); | |
6cf29fe8 | 5793 | delete_by_moving_to_trash = 0; |
d67b4f80 | 5794 | Qdelete_by_moving_to_trash = intern_c_string ("delete-by-moving-to-trash"); |
cd3520a4 JB |
5795 | |
5796 | DEFSYM (Qmove_file_to_trash, "move-file-to-trash"); | |
5797 | DEFSYM (Qcopy_directory, "copy-directory"); | |
5798 | DEFSYM (Qdelete_directory, "delete-directory"); | |
6cf29fe8 | 5799 | |
642ef245 | 5800 | defsubr (&Sfind_file_name_handler); |
570d7624 JB |
5801 | defsubr (&Sfile_name_directory); |
5802 | defsubr (&Sfile_name_nondirectory); | |
642ef245 | 5803 | defsubr (&Sunhandled_file_name_directory); |
570d7624 JB |
5804 | defsubr (&Sfile_name_as_directory); |
5805 | defsubr (&Sdirectory_file_name); | |
5806 | defsubr (&Smake_temp_name); | |
5807 | defsubr (&Sexpand_file_name); | |
5808 | defsubr (&Ssubstitute_in_file_name); | |
5809 | defsubr (&Scopy_file); | |
9bbe01fb | 5810 | defsubr (&Smake_directory_internal); |
9d8f3bd9 | 5811 | defsubr (&Sdelete_directory_internal); |
570d7624 JB |
5812 | defsubr (&Sdelete_file); |
5813 | defsubr (&Srename_file); | |
5814 | defsubr (&Sadd_name_to_file); | |
570d7624 | 5815 | defsubr (&Smake_symbolic_link); |
570d7624 JB |
5816 | defsubr (&Sfile_name_absolute_p); |
5817 | defsubr (&Sfile_exists_p); | |
5818 | defsubr (&Sfile_executable_p); | |
5819 | defsubr (&Sfile_readable_p); | |
5820 | defsubr (&Sfile_writable_p); | |
1f8653eb | 5821 | defsubr (&Saccess_file); |
570d7624 JB |
5822 | defsubr (&Sfile_symlink_p); |
5823 | defsubr (&Sfile_directory_p); | |
b72dea2a | 5824 | defsubr (&Sfile_accessible_directory_p); |
f793dc6c | 5825 | defsubr (&Sfile_regular_p); |
570d7624 JB |
5826 | defsubr (&Sfile_modes); |
5827 | defsubr (&Sset_file_modes); | |
819da85b | 5828 | defsubr (&Sset_file_times); |
574c05e2 KK |
5829 | defsubr (&Sfile_selinux_context); |
5830 | defsubr (&Sset_file_selinux_context); | |
c24e9a53 RS |
5831 | defsubr (&Sset_default_file_modes); |
5832 | defsubr (&Sdefault_file_modes); | |
570d7624 JB |
5833 | defsubr (&Sfile_newer_than_file_p); |
5834 | defsubr (&Sinsert_file_contents); | |
5835 | defsubr (&Swrite_region); | |
d6a3cc15 | 5836 | defsubr (&Scar_less_than_car); |
570d7624 JB |
5837 | defsubr (&Sverify_visited_file_modtime); |
5838 | defsubr (&Sclear_visited_file_modtime); | |
f5d5eccf | 5839 | defsubr (&Svisited_file_modtime); |
570d7624 JB |
5840 | defsubr (&Sset_visited_file_modtime); |
5841 | defsubr (&Sdo_auto_save); | |
5842 | defsubr (&Sset_buffer_auto_saved); | |
b60247d9 | 5843 | defsubr (&Sclear_buffer_auto_save_failure); |
570d7624 JB |
5844 | defsubr (&Srecent_auto_save_p); |
5845 | ||
88208bb8 | 5846 | defsubr (&Snext_read_file_uses_dialog_p); |
85ffea93 | 5847 | |
697c17a2 | 5848 | #ifdef HAVE_SYNC |
85ffea93 | 5849 | defsubr (&Sunix_sync); |
483a2e10 | 5850 | #endif |
570d7624 | 5851 | } |