Commit | Line | Data |
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570d7624 | 1 | /* File IO for GNU Emacs. |
0b5538bd TTN |
2 | Copyright (C) 1985, 1986, 1987, 1988, 1993, 1994, 1995, 1996, |
3 | 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, | |
76b6f707 | 4 | 2005, 2006, 2007, 2008, 2009 Free Software Foundation, Inc. |
570d7624 JB |
5 | |
6 | This file is part of GNU Emacs. | |
7 | ||
9ec0b715 | 8 | GNU Emacs is free software: you can redistribute it and/or modify |
570d7624 | 9 | it under the terms of the GNU General Public License as published by |
9ec0b715 GM |
10 | the Free Software Foundation, either version 3 of the License, or |
11 | (at your option) any later version. | |
570d7624 JB |
12 | |
13 | GNU Emacs is distributed in the hope that it will be useful, | |
14 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | GNU General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU General Public License | |
9ec0b715 | 19 | along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. */ |
570d7624 | 20 | |
18160b98 | 21 | #include <config.h> |
77a28bbf | 22 | #include <limits.h> |
570d7624 | 23 | |
612221ab | 24 | #ifdef HAVE_FCNTL_H |
bb369dc6 RS |
25 | #include <fcntl.h> |
26 | #endif | |
27 | ||
1b335d29 | 28 | #include <stdio.h> |
570d7624 JB |
29 | #include <sys/types.h> |
30 | #include <sys/stat.h> | |
bfb61299 | 31 | |
29beb080 RS |
32 | #ifdef HAVE_UNISTD_H |
33 | #include <unistd.h> | |
34 | #endif | |
35 | ||
f73b0ada BF |
36 | #if !defined (S_ISLNK) && defined (S_IFLNK) |
37 | # define S_ISLNK(m) (((m) & S_IFMT) == S_IFLNK) | |
38 | #endif | |
39 | ||
bb369dc6 RS |
40 | #if !defined (S_ISFIFO) && defined (S_IFIFO) |
41 | # define S_ISFIFO(m) (((m) & S_IFMT) == S_IFIFO) | |
42 | #endif | |
43 | ||
f73b0ada BF |
44 | #if !defined (S_ISREG) && defined (S_IFREG) |
45 | # define S_ISREG(m) (((m) & S_IFMT) == S_IFREG) | |
46 | #endif | |
47 | ||
5b9c0a1d | 48 | #ifdef HAVE_PWD_H |
570d7624 | 49 | #include <pwd.h> |
bfb61299 JB |
50 | #endif |
51 | ||
570d7624 | 52 | #include <ctype.h> |
570d7624 JB |
53 | #include <errno.h> |
54 | ||
bfb61299 | 55 | #ifndef vax11c |
f12ef5eb | 56 | #ifndef USE_CRT_DLL |
570d7624 | 57 | extern int errno; |
570d7624 | 58 | #endif |
f12ef5eb | 59 | #endif |
570d7624 | 60 | |
570d7624 | 61 | #include "lisp.h" |
8d4e077b | 62 | #include "intervals.h" |
570d7624 | 63 | #include "buffer.h" |
db327c7e | 64 | #include "character.h" |
6fdaa9a0 | 65 | #include "coding.h" |
570d7624 | 66 | #include "window.h" |
67c08d6c | 67 | #include "blockinput.h" |
385ed61f KL |
68 | #include "frame.h" |
69 | #include "dispextern.h" | |
570d7624 | 70 | |
5e570b75 RS |
71 | #ifdef WINDOWSNT |
72 | #define NOMINMAX 1 | |
73 | #include <windows.h> | |
74 | #include <stdlib.h> | |
75 | #include <fcntl.h> | |
76 | #endif /* not WINDOWSNT */ | |
77 | ||
7990d02a EZ |
78 | #ifdef MSDOS |
79 | #include "msdos.h" | |
80 | #include <sys/param.h> | |
81 | #if __DJGPP__ >= 2 | |
82 | #include <fcntl.h> | |
83 | #include <string.h> | |
84 | #endif | |
85 | #endif | |
86 | ||
199607e4 RS |
87 | #ifdef DOS_NT |
88 | #define CORRECT_DIR_SEPS(s) \ | |
89 | do { if ('/' == DIRECTORY_SEP) dostounix_filename (s); \ | |
90 | else unixtodos_filename (s); \ | |
91 | } while (0) | |
92 | /* On Windows, drive letters must be alphabetic - on DOS, the Netware | |
93 | redirector allows the six letters between 'Z' and 'a' as well. */ | |
94 | #ifdef MSDOS | |
95 | #define IS_DRIVE(x) ((x) >= 'A' && (x) <= 'z') | |
96 | #endif | |
97 | #ifdef WINDOWSNT | |
98 | #define IS_DRIVE(x) isalpha (x) | |
99 | #endif | |
f54b565c MB |
100 | /* Need to lower-case the drive letter, or else expanded |
101 | filenames will sometimes compare inequal, because | |
102 | `expand-file-name' doesn't always down-case the drive letter. */ | |
103 | #define DRIVE_LETTER(x) (tolower (x)) | |
199607e4 RS |
104 | #endif |
105 | ||
de5bf5d3 | 106 | #include "systime.h" |
570d7624 JB |
107 | |
108 | #ifdef HPUX | |
109 | #include <netio.h> | |
47e7b9e5 | 110 | #endif |
570d7624 | 111 | |
9c856db9 GM |
112 | #include "commands.h" |
113 | extern int use_dialog_box; | |
6b61353c | 114 | extern int use_file_dialog; |
9c856db9 | 115 | |
570d7624 JB |
116 | #ifndef O_WRONLY |
117 | #define O_WRONLY 1 | |
118 | #endif | |
119 | ||
4018b5ef RS |
120 | #ifndef O_RDONLY |
121 | #define O_RDONLY 0 | |
122 | #endif | |
123 | ||
8f6df9b5 EZ |
124 | #ifndef S_ISLNK |
125 | # define lstat stat | |
126 | #endif | |
127 | ||
c1558952 TTN |
128 | #ifndef FILE_SYSTEM_CASE |
129 | #define FILE_SYSTEM_CASE(filename) (filename) | |
130 | #endif | |
131 | ||
570d7624 JB |
132 | /* Nonzero during writing of auto-save files */ |
133 | int auto_saving; | |
134 | ||
135 | /* Set by auto_save_1 to mode of original file so Fwrite_region will create | |
136 | a new file with the same mode as the original */ | |
137 | int auto_save_mode_bits; | |
138 | ||
ca730bf0 CY |
139 | /* Set by auto_save_1 if an error occurred during the last auto-save. */ |
140 | int auto_save_error_occurred; | |
141 | ||
356a6224 KH |
142 | /* The symbol bound to coding-system-for-read when |
143 | insert-file-contents is called for recovering a file. This is not | |
144 | an actual coding system name, but just an indicator to tell | |
145 | insert-file-contents to use `emacs-mule' with a special flag for | |
146 | auto saving and recovering a file. */ | |
147 | Lisp_Object Qauto_save_coding; | |
148 | ||
b1d1b865 RS |
149 | /* Coding system for file names, or nil if none. */ |
150 | Lisp_Object Vfile_name_coding_system; | |
151 | ||
cd913586 KH |
152 | /* Coding system for file names used only when |
153 | Vfile_name_coding_system is nil. */ | |
154 | Lisp_Object Vdefault_file_name_coding_system; | |
155 | ||
199607e4 | 156 | /* Alist of elements (REGEXP . HANDLER) for file names |
32f4334d RS |
157 | whose I/O is done with a special handler. */ |
158 | Lisp_Object Vfile_name_handler_alist; | |
159 | ||
f6c9b683 RS |
160 | /* Property name of a file name handler, |
161 | which gives a list of operations it handles.. */ | |
162 | Lisp_Object Qoperations; | |
163 | ||
0d420e88 BG |
164 | /* Lisp functions for translating file formats */ |
165 | Lisp_Object Qformat_decode, Qformat_annotate_function; | |
166 | ||
c9e82392 | 167 | /* Function to be called to decide a coding system of a reading file. */ |
0414b394 | 168 | Lisp_Object Vset_auto_coding_function; |
c9e82392 | 169 | |
d6a3cc15 RS |
170 | /* Functions to be called to process text properties in inserted file. */ |
171 | Lisp_Object Vafter_insert_file_functions; | |
172 | ||
2080470e | 173 | /* Lisp function for setting buffer-file-coding-system and the |
b6426b03 | 174 | multibyteness of the current buffer after inserting a file. */ |
2080470e | 175 | Lisp_Object Qafter_insert_file_set_coding; |
b6426b03 | 176 | |
d6a3cc15 RS |
177 | /* Functions to be called to create text property annotations for file. */ |
178 | Lisp_Object Vwrite_region_annotate_functions; | |
bd235610 | 179 | Lisp_Object Qwrite_region_annotate_functions; |
67fbc0cb | 180 | Lisp_Object Vwrite_region_post_annotation_function; |
d6a3cc15 | 181 | |
6fc6f94b RS |
182 | /* During build_annotations, each time an annotation function is called, |
183 | this holds the annotations made by the previous functions. */ | |
184 | Lisp_Object Vwrite_region_annotations_so_far; | |
185 | ||
67fbc0cb CY |
186 | /* Each time an annotation function changes the buffer, the new buffer |
187 | is added here. */ | |
188 | Lisp_Object Vwrite_region_annotation_buffers; | |
189 | ||
e54d3b5d RS |
190 | /* File name in which we write a list of all our auto save files. */ |
191 | Lisp_Object Vauto_save_list_file_name; | |
192 | ||
699b53bc CY |
193 | /* Whether or not files are auto-saved into themselves. */ |
194 | Lisp_Object Vauto_save_visited_file_name; | |
195 | ||
199607e4 RS |
196 | /* On NT, specifies the directory separator character, used (eg.) when |
197 | expanding file names. This can be bound to / or \. */ | |
198 | Lisp_Object Vdirectory_sep_char; | |
199 | ||
ccf61795 RF |
200 | #ifdef HAVE_FSYNC |
201 | /* Nonzero means skip the call to fsync in Fwrite-region. */ | |
202 | int write_region_inhibit_fsync; | |
203 | #endif | |
204 | ||
6cf29fe8 JR |
205 | /* Non-zero means call move-file-to-trash in Fdelete_file or |
206 | Fdelete_directory. */ | |
207 | int delete_by_moving_to_trash; | |
208 | ||
d2b66acf GM |
209 | Lisp_Object Qdelete_by_moving_to_trash; |
210 | ||
6cf29fe8 JR |
211 | /* Lisp function for moving files to trash. */ |
212 | Lisp_Object Qmove_file_to_trash; | |
213 | ||
84f6296a RS |
214 | extern Lisp_Object Vuser_login_name; |
215 | ||
c1c4693e RS |
216 | #ifdef WINDOWSNT |
217 | extern Lisp_Object Vw32_get_true_file_attributes; | |
218 | #endif | |
219 | ||
84f6296a RS |
220 | extern int minibuf_level; |
221 | ||
a8c828be RS |
222 | extern int minibuffer_auto_raise; |
223 | ||
a65970a0 RS |
224 | /* These variables describe handlers that have "already" had a chance |
225 | to handle the current operation. | |
226 | ||
227 | Vinhibit_file_name_handlers is a list of file name handlers. | |
228 | Vinhibit_file_name_operation is the operation being handled. | |
229 | If we try to handle that operation, we ignore those handlers. */ | |
230 | ||
82c2d839 | 231 | static Lisp_Object Vinhibit_file_name_handlers; |
a65970a0 | 232 | static Lisp_Object Vinhibit_file_name_operation; |
82c2d839 | 233 | |
c0b7b21c | 234 | Lisp_Object Qfile_error, Qfile_already_exists, Qfile_date_error; |
505ab9bc | 235 | Lisp_Object Qexcl; |
15c65264 RS |
236 | Lisp_Object Qfile_name_history; |
237 | ||
d6a3cc15 RS |
238 | Lisp_Object Qcar_less_than_car; |
239 | ||
ce51c54c | 240 | static int a_write P_ ((int, Lisp_Object, int, int, |
b9013200 | 241 | Lisp_Object *, struct coding_system *)); |
ce51c54c KH |
242 | static int e_write P_ ((int, Lisp_Object, int, int, struct coding_system *)); |
243 | ||
ec7adf26 | 244 | \f |
5d01d666 | 245 | void |
570d7624 | 246 | report_file_error (string, data) |
19290c65 | 247 | const char *string; |
570d7624 JB |
248 | Lisp_Object data; |
249 | { | |
250 | Lisp_Object errstring; | |
505ab9bc | 251 | int errorno = errno; |
d7259fdb | 252 | char *str; |
570d7624 | 253 | |
ca9c0567 | 254 | synchronize_system_messages_locale (); |
d7259fdb KH |
255 | str = strerror (errorno); |
256 | errstring = code_convert_string_norecord (make_unibyte_string (str, | |
257 | strlen (str)), | |
68c45bf0 PE |
258 | Vlocale_coding_system, 0); |
259 | ||
570d7624 | 260 | while (1) |
505ab9bc RS |
261 | switch (errorno) |
262 | { | |
263 | case EEXIST: | |
24b1ddad | 264 | xsignal (Qfile_already_exists, Fcons (errstring, data)); |
505ab9bc RS |
265 | break; |
266 | default: | |
267 | /* System error messages are capitalized. Downcase the initial | |
39824137 EZ |
268 | unless it is followed by a slash. (The slash case caters to |
269 | error messages that begin with "I/O" or, in German, "E/A".) */ | |
d5443ffd KH |
270 | if (STRING_MULTIBYTE (errstring) |
271 | && ! EQ (Faref (errstring, make_number (1)), make_number ('/'))) | |
6c0969ca KH |
272 | { |
273 | int c; | |
274 | ||
275 | str = (char *) SDATA (errstring); | |
276 | c = STRING_CHAR (str, 0); | |
c7c7a80c | 277 | Faset (errstring, make_number (0), make_number (DOWNCASE (c))); |
6c0969ca | 278 | } |
505ab9bc | 279 | |
24b1ddad | 280 | xsignal (Qfile_error, |
505ab9bc RS |
281 | Fcons (build_string (string), Fcons (errstring, data))); |
282 | } | |
570d7624 | 283 | } |
b5148e85 | 284 | |
b27a1703 | 285 | Lisp_Object |
b5148e85 RS |
286 | close_file_unwind (fd) |
287 | Lisp_Object fd; | |
288 | { | |
68c45bf0 | 289 | emacs_close (XFASTINT (fd)); |
b27a1703 | 290 | return Qnil; |
b5148e85 | 291 | } |
a1d2b64a RS |
292 | |
293 | /* Restore point, having saved it as a marker. */ | |
294 | ||
ec7adf26 | 295 | static Lisp_Object |
a1d2b64a | 296 | restore_point_unwind (location) |
199607e4 | 297 | Lisp_Object location; |
a1d2b64a | 298 | { |
ec7adf26 | 299 | Fgoto_char (location); |
a1d2b64a | 300 | Fset_marker (location, Qnil, Qnil); |
b27a1703 | 301 | return Qnil; |
a1d2b64a | 302 | } |
59c94f03 | 303 | |
570d7624 | 304 | \f |
0bf2eed2 | 305 | Lisp_Object Qexpand_file_name; |
273e0829 | 306 | Lisp_Object Qsubstitute_in_file_name; |
0bf2eed2 RS |
307 | Lisp_Object Qdirectory_file_name; |
308 | Lisp_Object Qfile_name_directory; | |
309 | Lisp_Object Qfile_name_nondirectory; | |
642ef245 | 310 | Lisp_Object Qunhandled_file_name_directory; |
0bf2eed2 | 311 | Lisp_Object Qfile_name_as_directory; |
32f4334d | 312 | Lisp_Object Qcopy_file; |
a6e6e718 | 313 | Lisp_Object Qmake_directory_internal; |
b272d624 | 314 | Lisp_Object Qmake_directory; |
32f4334d RS |
315 | Lisp_Object Qdelete_directory; |
316 | Lisp_Object Qdelete_file; | |
317 | Lisp_Object Qrename_file; | |
318 | Lisp_Object Qadd_name_to_file; | |
319 | Lisp_Object Qmake_symbolic_link; | |
320 | Lisp_Object Qfile_exists_p; | |
321 | Lisp_Object Qfile_executable_p; | |
322 | Lisp_Object Qfile_readable_p; | |
32f4334d | 323 | Lisp_Object Qfile_writable_p; |
1f8653eb RS |
324 | Lisp_Object Qfile_symlink_p; |
325 | Lisp_Object Qaccess_file; | |
32f4334d | 326 | Lisp_Object Qfile_directory_p; |
adedc71d | 327 | Lisp_Object Qfile_regular_p; |
32f4334d RS |
328 | Lisp_Object Qfile_accessible_directory_p; |
329 | Lisp_Object Qfile_modes; | |
330 | Lisp_Object Qset_file_modes; | |
819da85b | 331 | Lisp_Object Qset_file_times; |
32f4334d RS |
332 | Lisp_Object Qfile_newer_than_file_p; |
333 | Lisp_Object Qinsert_file_contents; | |
334 | Lisp_Object Qwrite_region; | |
335 | Lisp_Object Qverify_visited_file_modtime; | |
3ec46acd | 336 | Lisp_Object Qset_visited_file_modtime; |
32f4334d | 337 | |
49307295 | 338 | DEFUN ("find-file-name-handler", Ffind_file_name_handler, Sfind_file_name_handler, 2, 2, 0, |
8c1a1077 PJ |
339 | doc: /* Return FILENAME's handler function for OPERATION, if it has one. |
340 | Otherwise, return nil. | |
341 | A file name is handled if one of the regular expressions in | |
342 | `file-name-handler-alist' matches it. | |
343 | ||
344 | If OPERATION equals `inhibit-file-name-operation', then we ignore | |
345 | any handlers that are members of `inhibit-file-name-handlers', | |
346 | but we still do run any other handlers. This lets handlers | |
347 | use the standard functions without calling themselves recursively. */) | |
348 | (filename, operation) | |
349 | Lisp_Object filename, operation; | |
32f4334d | 350 | { |
642ef245 | 351 | /* This function must not munge the match data. */ |
204ee271 | 352 | Lisp_Object chain, inhibited_handlers, result; |
8d2ced53 | 353 | int pos = -1; |
642ef245 | 354 | |
204ee271 | 355 | result = Qnil; |
b7826503 | 356 | CHECK_STRING (filename); |
e4432095 | 357 | |
a65970a0 RS |
358 | if (EQ (operation, Vinhibit_file_name_operation)) |
359 | inhibited_handlers = Vinhibit_file_name_handlers; | |
360 | else | |
361 | inhibited_handlers = Qnil; | |
82c2d839 | 362 | |
93c30b5f | 363 | for (chain = Vfile_name_handler_alist; CONSP (chain); |
03699b14 | 364 | chain = XCDR (chain)) |
32f4334d RS |
365 | { |
366 | Lisp_Object elt; | |
03699b14 | 367 | elt = XCAR (chain); |
93c30b5f | 368 | if (CONSP (elt)) |
32f4334d | 369 | { |
f6c9b683 | 370 | Lisp_Object string = XCAR (elt); |
8d2ced53 | 371 | int match_pos; |
f6c9b683 | 372 | Lisp_Object handler = XCDR (elt); |
68780e2a RS |
373 | Lisp_Object operations = Qnil; |
374 | ||
375 | if (SYMBOLP (handler)) | |
376 | operations = Fget (handler, Qoperations); | |
f6c9b683 | 377 | |
8d2ced53 | 378 | if (STRINGP (string) |
f6c9b683 RS |
379 | && (match_pos = fast_string_match (string, filename)) > pos |
380 | && (NILP (operations) || ! NILP (Fmemq (operation, operations)))) | |
a65970a0 | 381 | { |
f6c9b683 | 382 | Lisp_Object tem; |
a65970a0 | 383 | |
03699b14 | 384 | handler = XCDR (elt); |
a65970a0 RS |
385 | tem = Fmemq (handler, inhibited_handlers); |
386 | if (NILP (tem)) | |
8d2ced53 SM |
387 | { |
388 | result = handler; | |
389 | pos = match_pos; | |
390 | } | |
a65970a0 | 391 | } |
32f4334d | 392 | } |
642ef245 JB |
393 | |
394 | QUIT; | |
32f4334d | 395 | } |
8d2ced53 | 396 | return result; |
32f4334d RS |
397 | } |
398 | \f | |
570d7624 | 399 | DEFUN ("file-name-directory", Ffile_name_directory, Sfile_name_directory, |
8c1a1077 PJ |
400 | 1, 1, 0, |
401 | doc: /* Return the directory component in file name FILENAME. | |
402 | Return nil if FILENAME does not include a directory. | |
78379264 | 403 | Otherwise return a directory name. |
7c2fb837 | 404 | Given a Unix syntax file name, returns a string ending in slash. */) |
8c1a1077 | 405 | (filename) |
3b7f6e60 | 406 | Lisp_Object filename; |
570d7624 | 407 | { |
100c44b7 | 408 | #ifndef DOS_NT |
19290c65 | 409 | register const unsigned char *beg; |
100c44b7 EZ |
410 | #else |
411 | register unsigned char *beg; | |
412 | #endif | |
19290c65 | 413 | register const unsigned char *p; |
0bf2eed2 | 414 | Lisp_Object handler; |
570d7624 | 415 | |
b7826503 | 416 | CHECK_STRING (filename); |
570d7624 | 417 | |
0bf2eed2 RS |
418 | /* If the file name has special constructs in it, |
419 | call the corresponding file handler. */ | |
3b7f6e60 | 420 | handler = Ffind_file_name_handler (filename, Qfile_name_directory); |
0bf2eed2 | 421 | if (!NILP (handler)) |
3b7f6e60 | 422 | return call2 (handler, Qfile_name_directory, filename); |
0bf2eed2 | 423 | |
3b7f6e60 | 424 | filename = FILE_SYSTEM_CASE (filename); |
199607e4 | 425 | #ifdef DOS_NT |
0f3f018c CY |
426 | beg = (unsigned char *) alloca (SBYTES (filename) + 1); |
427 | bcopy (SDATA (filename), beg, SBYTES (filename) + 1); | |
428 | #else | |
429 | beg = SDATA (filename); | |
199607e4 | 430 | #endif |
d5db4077 | 431 | p = beg + SBYTES (filename); |
570d7624 | 432 | |
199607e4 | 433 | while (p != beg && !IS_DIRECTORY_SEP (p[-1]) |
199607e4 | 434 | #ifdef DOS_NT |
ba14e174 RS |
435 | /* only recognise drive specifier at the beginning */ |
436 | && !(p[-1] == ':' | |
437 | /* handle the "/:d:foo" and "/:foo" cases correctly */ | |
438 | && ((p == beg + 2 && !IS_DIRECTORY_SEP (*beg)) | |
439 | || (p == beg + 4 && IS_DIRECTORY_SEP (*beg)))) | |
199607e4 | 440 | #endif |
570d7624 JB |
441 | ) p--; |
442 | ||
443 | if (p == beg) | |
444 | return Qnil; | |
5e570b75 | 445 | #ifdef DOS_NT |
4c3c22f3 | 446 | /* Expansion of "c:" to drive and default directory. */ |
ba14e174 | 447 | if (p[-1] == ':') |
4c3c22f3 | 448 | { |
4c3c22f3 | 449 | /* MAXPATHLEN+1 is guaranteed to be enough space for getdefdir. */ |
199607e4 | 450 | unsigned char *res = alloca (MAXPATHLEN + 1); |
ba14e174 RS |
451 | unsigned char *r = res; |
452 | ||
453 | if (p == beg + 4 && IS_DIRECTORY_SEP (*beg) && beg[1] == ':') | |
454 | { | |
455 | strncpy (res, beg, 2); | |
456 | beg += 2; | |
457 | r += 2; | |
458 | } | |
459 | ||
460 | if (getdefdir (toupper (*beg) - 'A' + 1, r)) | |
4c3c22f3 | 461 | { |
199607e4 | 462 | if (!IS_DIRECTORY_SEP (res[strlen (res) - 1])) |
4c3c22f3 RS |
463 | strcat (res, "/"); |
464 | beg = res; | |
465 | p = beg + strlen (beg); | |
466 | } | |
467 | } | |
199607e4 | 468 | CORRECT_DIR_SEPS (beg); |
5e570b75 | 469 | #endif /* DOS_NT */ |
60d67b83 | 470 | |
d7231f93 | 471 | return make_specified_string (beg, -1, p - beg, STRING_MULTIBYTE (filename)); |
570d7624 JB |
472 | } |
473 | ||
60d67b83 RS |
474 | DEFUN ("file-name-nondirectory", Ffile_name_nondirectory, |
475 | Sfile_name_nondirectory, 1, 1, 0, | |
8c1a1077 PJ |
476 | doc: /* Return file name FILENAME sans its directory. |
477 | For example, in a Unix-syntax file name, | |
478 | this is everything after the last slash, | |
479 | or the entire name if it contains no slash. */) | |
480 | (filename) | |
3b7f6e60 | 481 | Lisp_Object filename; |
570d7624 | 482 | { |
19290c65 | 483 | register const unsigned char *beg, *p, *end; |
0bf2eed2 | 484 | Lisp_Object handler; |
570d7624 | 485 | |
b7826503 | 486 | CHECK_STRING (filename); |
570d7624 | 487 | |
0bf2eed2 RS |
488 | /* If the file name has special constructs in it, |
489 | call the corresponding file handler. */ | |
3b7f6e60 | 490 | handler = Ffind_file_name_handler (filename, Qfile_name_nondirectory); |
0bf2eed2 | 491 | if (!NILP (handler)) |
3b7f6e60 | 492 | return call2 (handler, Qfile_name_nondirectory, filename); |
0bf2eed2 | 493 | |
d5db4077 KR |
494 | beg = SDATA (filename); |
495 | end = p = beg + SBYTES (filename); | |
570d7624 | 496 | |
199607e4 | 497 | while (p != beg && !IS_DIRECTORY_SEP (p[-1]) |
199607e4 RS |
498 | #ifdef DOS_NT |
499 | /* only recognise drive specifier at beginning */ | |
ba14e174 RS |
500 | && !(p[-1] == ':' |
501 | /* handle the "/:d:foo" case correctly */ | |
502 | && (p == beg + 2 || (p == beg + 4 && IS_DIRECTORY_SEP (*beg)))) | |
199607e4 | 503 | #endif |
60d67b83 RS |
504 | ) |
505 | p--; | |
570d7624 | 506 | |
d7231f93 | 507 | return make_specified_string (p, -1, end - p, STRING_MULTIBYTE (filename)); |
570d7624 | 508 | } |
642ef245 | 509 | |
60d67b83 RS |
510 | DEFUN ("unhandled-file-name-directory", Funhandled_file_name_directory, |
511 | Sunhandled_file_name_directory, 1, 1, 0, | |
8c1a1077 PJ |
512 | doc: /* Return a directly usable directory name somehow associated with FILENAME. |
513 | A `directly usable' directory name is one that may be used without the | |
514 | intervention of any file handler. | |
515 | If FILENAME is a directly usable file itself, return | |
516 | \(file-name-directory FILENAME). | |
ca319910 SM |
517 | If FILENAME refers to a file which is not accessible from a local process, |
518 | then this should return nil. | |
8c1a1077 PJ |
519 | The `call-process' and `start-process' functions use this function to |
520 | get a current directory to run processes in. */) | |
521 | (filename) | |
522 | Lisp_Object filename; | |
642ef245 JB |
523 | { |
524 | Lisp_Object handler; | |
525 | ||
526 | /* If the file name has special constructs in it, | |
527 | call the corresponding file handler. */ | |
49307295 | 528 | handler = Ffind_file_name_handler (filename, Qunhandled_file_name_directory); |
642ef245 JB |
529 | if (!NILP (handler)) |
530 | return call2 (handler, Qunhandled_file_name_directory, filename); | |
531 | ||
532 | return Ffile_name_directory (filename); | |
533 | } | |
534 | ||
570d7624 JB |
535 | \f |
536 | char * | |
537 | file_name_as_directory (out, in) | |
538 | char *out, *in; | |
539 | { | |
540 | int size = strlen (in) - 1; | |
541 | ||
542 | strcpy (out, in); | |
543 | ||
8aa3a244 RS |
544 | if (size < 0) |
545 | { | |
154a307d KH |
546 | out[0] = '.'; |
547 | out[1] = '/'; | |
548 | out[2] = 0; | |
8aa3a244 RS |
549 | return out; |
550 | } | |
551 | ||
570d7624 | 552 | /* For Unix syntax, Append a slash if necessary */ |
199607e4 | 553 | if (!IS_DIRECTORY_SEP (out[size])) |
5e570b75 | 554 | { |
8cfd6446 JB |
555 | /* Cannot use DIRECTORY_SEP, which could have any value */ |
556 | out[size + 1] = '/'; | |
5e570b75 RS |
557 | out[size + 2] = '\0'; |
558 | } | |
199607e4 RS |
559 | #ifdef DOS_NT |
560 | CORRECT_DIR_SEPS (out); | |
561 | #endif | |
570d7624 JB |
562 | return out; |
563 | } | |
564 | ||
565 | DEFUN ("file-name-as-directory", Ffile_name_as_directory, | |
566 | Sfile_name_as_directory, 1, 1, 0, | |
0dac4f85 | 567 | doc: /* Return a string representing the file name FILE interpreted as a directory. |
8c1a1077 PJ |
568 | This operation exists because a directory is also a file, but its name as |
569 | a directory is different from its name as a file. | |
570 | The result can be used as the value of `default-directory' | |
571 | or passed as second argument to `expand-file-name'. | |
7c2fb837 | 572 | For a Unix-syntax file name, just appends a slash. */) |
8c1a1077 | 573 | (file) |
570d7624 JB |
574 | Lisp_Object file; |
575 | { | |
576 | char *buf; | |
0bf2eed2 | 577 | Lisp_Object handler; |
570d7624 | 578 | |
b7826503 | 579 | CHECK_STRING (file); |
265a9e55 | 580 | if (NILP (file)) |
570d7624 | 581 | return Qnil; |
0bf2eed2 RS |
582 | |
583 | /* If the file name has special constructs in it, | |
584 | call the corresponding file handler. */ | |
49307295 | 585 | handler = Ffind_file_name_handler (file, Qfile_name_as_directory); |
0bf2eed2 RS |
586 | if (!NILP (handler)) |
587 | return call2 (handler, Qfile_name_as_directory, file); | |
588 | ||
d5db4077 | 589 | buf = (char *) alloca (SBYTES (file) + 10); |
d7231f93 KH |
590 | file_name_as_directory (buf, SDATA (file)); |
591 | return make_specified_string (buf, -1, strlen (buf), | |
592 | STRING_MULTIBYTE (file)); | |
570d7624 JB |
593 | } |
594 | \f | |
595 | /* | |
596 | * Convert from directory name to filename. | |
199607e4 | 597 | * On UNIX, it's simple: just make sure there isn't a terminating / |
570d7624 JB |
598 | |
599 | * Value is nonzero if the string output is different from the input. | |
600 | */ | |
601 | ||
dfcf069d | 602 | int |
570d7624 JB |
603 | directory_file_name (src, dst) |
604 | char *src, *dst; | |
605 | { | |
606 | long slen; | |
570d7624 JB |
607 | |
608 | slen = strlen (src); | |
7c2fb837 | 609 | |
570d7624 JB |
610 | /* Process as Unix format: just remove any final slash. |
611 | But leave "/" unchanged; do not change it to "". */ | |
612 | strcpy (dst, src); | |
199607e4 | 613 | if (slen > 1 |
5e570b75 | 614 | && IS_DIRECTORY_SEP (dst[slen - 1]) |
4592782e RS |
615 | #ifdef DOS_NT |
616 | && !IS_ANY_SEP (dst[slen - 2]) | |
617 | #endif | |
618 | ) | |
570d7624 | 619 | dst[slen - 1] = 0; |
199607e4 RS |
620 | #ifdef DOS_NT |
621 | CORRECT_DIR_SEPS (dst); | |
125feee8 | 622 | #endif |
570d7624 JB |
623 | return 1; |
624 | } | |
625 | ||
626 | DEFUN ("directory-file-name", Fdirectory_file_name, Sdirectory_file_name, | |
8c1a1077 PJ |
627 | 1, 1, 0, |
628 | doc: /* Returns the file name of the directory named DIRECTORY. | |
629 | This is the name of the file that holds the data for the directory DIRECTORY. | |
630 | This operation exists because a directory is also a file, but its name as | |
631 | a directory is different from its name as a file. | |
7c2fb837 | 632 | In Unix-syntax, this function just removes the final slash. */) |
8c1a1077 | 633 | (directory) |
570d7624 JB |
634 | Lisp_Object directory; |
635 | { | |
636 | char *buf; | |
0bf2eed2 | 637 | Lisp_Object handler; |
570d7624 | 638 | |
b7826503 | 639 | CHECK_STRING (directory); |
570d7624 | 640 | |
265a9e55 | 641 | if (NILP (directory)) |
570d7624 | 642 | return Qnil; |
0bf2eed2 RS |
643 | |
644 | /* If the file name has special constructs in it, | |
645 | call the corresponding file handler. */ | |
49307295 | 646 | handler = Ffind_file_name_handler (directory, Qdirectory_file_name); |
0bf2eed2 RS |
647 | if (!NILP (handler)) |
648 | return call2 (handler, Qdirectory_file_name, directory); | |
649 | ||
d5db4077 | 650 | buf = (char *) alloca (SBYTES (directory) + 20); |
d5db4077 | 651 | directory_file_name (SDATA (directory), buf); |
d7231f93 KH |
652 | return make_specified_string (buf, -1, strlen (buf), |
653 | STRING_MULTIBYTE (directory)); | |
570d7624 JB |
654 | } |
655 | ||
3ce839e4 RS |
656 | static char make_temp_name_tbl[64] = |
657 | { | |
658 | 'A','B','C','D','E','F','G','H', | |
659 | 'I','J','K','L','M','N','O','P', | |
660 | 'Q','R','S','T','U','V','W','X', | |
661 | 'Y','Z','a','b','c','d','e','f', | |
662 | 'g','h','i','j','k','l','m','n', | |
663 | 'o','p','q','r','s','t','u','v', | |
664 | 'w','x','y','z','0','1','2','3', | |
665 | '4','5','6','7','8','9','-','_' | |
666 | }; | |
cb613bb8 | 667 | |
3ce839e4 RS |
668 | static unsigned make_temp_name_count, make_temp_name_count_initialized_p; |
669 | ||
cb613bb8 | 670 | /* Value is a temporary file name starting with PREFIX, a string. |
efdc16c9 | 671 | |
cb613bb8 GM |
672 | The Emacs process number forms part of the result, so there is |
673 | no danger of generating a name being used by another process. | |
674 | In addition, this function makes an attempt to choose a name | |
675 | which has no existing file. To make this work, PREFIX should be | |
676 | an absolute file name. | |
efdc16c9 | 677 | |
cb613bb8 GM |
678 | BASE64_P non-zero means add the pid as 3 characters in base64 |
679 | encoding. In this case, 6 characters will be added to PREFIX to | |
680 | form the file name. Otherwise, if Emacs is running on a system | |
681 | with long file names, add the pid as a decimal number. | |
682 | ||
683 | This function signals an error if no unique file name could be | |
684 | generated. */ | |
685 | ||
686 | Lisp_Object | |
687 | make_temp_name (prefix, base64_p) | |
570d7624 | 688 | Lisp_Object prefix; |
cb613bb8 | 689 | int base64_p; |
570d7624 JB |
690 | { |
691 | Lisp_Object val; | |
0cedd530 | 692 | int len, clen; |
3ce839e4 RS |
693 | int pid; |
694 | unsigned char *p, *data; | |
695 | char pidbuf[20]; | |
696 | int pidlen; | |
efdc16c9 | 697 | |
b7826503 | 698 | CHECK_STRING (prefix); |
3ce839e4 RS |
699 | |
700 | /* VAL is created by adding 6 characters to PREFIX. The first | |
701 | three are the PID of this process, in base 64, and the second | |
702 | three are incremented if the file already exists. This ensures | |
703 | 262144 unique file names per PID per PREFIX. */ | |
704 | ||
705 | pid = (int) getpid (); | |
706 | ||
cb613bb8 GM |
707 | if (base64_p) |
708 | { | |
709 | pidbuf[0] = make_temp_name_tbl[pid & 63], pid >>= 6; | |
710 | pidbuf[1] = make_temp_name_tbl[pid & 63], pid >>= 6; | |
711 | pidbuf[2] = make_temp_name_tbl[pid & 63], pid >>= 6; | |
712 | pidlen = 3; | |
713 | } | |
714 | else | |
715 | { | |
3ce839e4 | 716 | #ifdef HAVE_LONG_FILE_NAMES |
cb613bb8 GM |
717 | sprintf (pidbuf, "%d", pid); |
718 | pidlen = strlen (pidbuf); | |
3a3bfb18 | 719 | #else |
cb613bb8 GM |
720 | pidbuf[0] = make_temp_name_tbl[pid & 63], pid >>= 6; |
721 | pidbuf[1] = make_temp_name_tbl[pid & 63], pid >>= 6; | |
722 | pidbuf[2] = make_temp_name_tbl[pid & 63], pid >>= 6; | |
723 | pidlen = 3; | |
3ce839e4 | 724 | #endif |
cb613bb8 | 725 | } |
efdc16c9 | 726 | |
0cedd530 SM |
727 | len = SBYTES (prefix); clen = SCHARS (prefix); |
728 | val = make_uninit_multibyte_string (clen + 3 + pidlen, len + 3 + pidlen); | |
729 | if (!STRING_MULTIBYTE (prefix)) | |
730 | STRING_SET_UNIBYTE (val); | |
d5db4077 KR |
731 | data = SDATA (val); |
732 | bcopy(SDATA (prefix), data, len); | |
3ce839e4 RS |
733 | p = data + len; |
734 | ||
735 | bcopy (pidbuf, p, pidlen); | |
736 | p += pidlen; | |
737 | ||
738 | /* Here we try to minimize useless stat'ing when this function is | |
739 | invoked many times successively with the same PREFIX. We achieve | |
740 | this by initializing count to a random value, and incrementing it | |
f6a492a9 RS |
741 | afterwards. |
742 | ||
743 | We don't want make-temp-name to be called while dumping, | |
744 | because then make_temp_name_count_initialized_p would get set | |
745 | and then make_temp_name_count would not be set when Emacs starts. */ | |
746 | ||
3ce839e4 RS |
747 | if (!make_temp_name_count_initialized_p) |
748 | { | |
749 | make_temp_name_count = (unsigned) time (NULL); | |
750 | make_temp_name_count_initialized_p = 1; | |
751 | } | |
752 | ||
753 | while (1) | |
754 | { | |
755 | struct stat ignored; | |
8a7777fc | 756 | unsigned num = make_temp_name_count; |
3ce839e4 RS |
757 | |
758 | p[0] = make_temp_name_tbl[num & 63], num >>= 6; | |
759 | p[1] = make_temp_name_tbl[num & 63], num >>= 6; | |
760 | p[2] = make_temp_name_tbl[num & 63], num >>= 6; | |
761 | ||
8a7777fc RS |
762 | /* Poor man's congruential RN generator. Replace with |
763 | ++make_temp_name_count for debugging. */ | |
764 | make_temp_name_count += 25229; | |
765 | make_temp_name_count %= 225307; | |
766 | ||
3ce839e4 RS |
767 | if (stat (data, &ignored) < 0) |
768 | { | |
769 | /* We want to return only if errno is ENOENT. */ | |
770 | if (errno == ENOENT) | |
771 | return val; | |
772 | else | |
773 | /* The error here is dubious, but there is little else we | |
774 | can do. The alternatives are to return nil, which is | |
775 | as bad as (and in many cases worse than) throwing the | |
776 | error, or to ignore the error, which will likely result | |
8a7777fc RS |
777 | in looping through 225307 stat's, which is not only |
778 | dog-slow, but also useless since it will fallback to | |
779 | the errow below, anyway. */ | |
9869bb0b | 780 | report_file_error ("Cannot create temporary name for prefix", |
3ce839e4 RS |
781 | Fcons (prefix, Qnil)); |
782 | /* not reached */ | |
783 | } | |
784 | } | |
785 | ||
786 | error ("Cannot create temporary name for prefix `%s'", | |
d5db4077 | 787 | SDATA (prefix)); |
3ce839e4 | 788 | return Qnil; |
570d7624 | 789 | } |
3ce839e4 | 790 | |
cb613bb8 GM |
791 | |
792 | DEFUN ("make-temp-name", Fmake_temp_name, Smake_temp_name, 1, 1, 0, | |
8c1a1077 PJ |
793 | doc: /* Generate temporary file name (string) starting with PREFIX (a string). |
794 | The Emacs process number forms part of the result, | |
795 | so there is no danger of generating a name being used by another process. | |
796 | ||
797 | In addition, this function makes an attempt to choose a name | |
798 | which has no existing file. To make this work, | |
799 | PREFIX should be an absolute file name. | |
800 | ||
801 | There is a race condition between calling `make-temp-name' and creating the | |
802 | file which opens all kinds of security holes. For that reason, you should | |
f9e6f049 RS |
803 | probably use `make-temp-file' instead, except in three circumstances: |
804 | ||
805 | * If you are creating the file in the user's home directory. | |
806 | * If you are creating a directory rather than an ordinary file. | |
807 | * If you are taking special precautions as `make-temp-file' does. */) | |
8c1a1077 | 808 | (prefix) |
cb613bb8 GM |
809 | Lisp_Object prefix; |
810 | { | |
811 | return make_temp_name (prefix, 0); | |
812 | } | |
813 | ||
814 | ||
570d7624 JB |
815 | \f |
816 | DEFUN ("expand-file-name", Fexpand_file_name, Sexpand_file_name, 1, 2, 0, | |
8c1a1077 PJ |
817 | doc: /* Convert filename NAME to absolute, and canonicalize it. |
818 | Second arg DEFAULT-DIRECTORY is directory to start with if NAME is relative | |
78379264 | 819 | \(does not start with slash or tilde); if DEFAULT-DIRECTORY is nil or missing, |
a4e03fe5 | 820 | the current buffer's value of `default-directory' is used. |
8c1a1077 PJ |
821 | File name components that are `.' are removed, and |
822 | so are file name components followed by `..', along with the `..' itself; | |
823 | note that these simplifications are done without checking the resulting | |
824 | file names in the file system. | |
825 | An initial `~/' expands to your home directory. | |
826 | An initial `~USER/' expands to USER's home directory. | |
07114296 CY |
827 | See also the function `substitute-in-file-name'. |
828 | ||
829 | For technical reasons, this function can return correct but | |
830 | non-intuitive results for the root directory; for instance, | |
831 | \(expand-file-name ".." "/") returns "/..". For this reason, use | |
832 | (directory-file-name (file-name-directory dirname)) to traverse a | |
833 | filesystem tree, not (expand-file-name ".." dirname). */) | |
8c1a1077 | 834 | (name, default_directory) |
3b7f6e60 | 835 | Lisp_Object name, default_directory; |
570d7624 | 836 | { |
5b5a2ea1 SM |
837 | /* These point to SDATA and need to be careful with string-relocation |
838 | during GC (via DECODE_FILE). */ | |
839 | unsigned char *nm, *newdir; | |
840 | /* This should only point to alloca'd data. */ | |
841 | unsigned char *target; | |
199607e4 | 842 | |
570d7624 | 843 | int tlen; |
570d7624 | 844 | struct passwd *pw; |
5e570b75 | 845 | #ifdef DOS_NT |
199607e4 | 846 | int drive = 0; |
9a1dc3be | 847 | int collapse_newdir = 1; |
f0f95d31 | 848 | int is_escaped = 0; |
5e570b75 | 849 | #endif /* DOS_NT */ |
199607e4 | 850 | int length; |
beb402de | 851 | Lisp_Object handler, result; |
2b046a72 | 852 | int multibyte; |
9c06a1f3 | 853 | Lisp_Object hdir; |
199607e4 | 854 | |
b7826503 | 855 | CHECK_STRING (name); |
570d7624 | 856 | |
0bf2eed2 RS |
857 | /* If the file name has special constructs in it, |
858 | call the corresponding file handler. */ | |
49307295 | 859 | handler = Ffind_file_name_handler (name, Qexpand_file_name); |
0bf2eed2 | 860 | if (!NILP (handler)) |
3b7f6e60 | 861 | return call3 (handler, Qexpand_file_name, name, default_directory); |
58fc9587 | 862 | |
3b7f6e60 EN |
863 | /* Use the buffer's default-directory if DEFAULT_DIRECTORY is omitted. */ |
864 | if (NILP (default_directory)) | |
865 | default_directory = current_buffer->directory; | |
82330e7f | 866 | if (! STRINGP (default_directory)) |
dd693537 EZ |
867 | { |
868 | #ifdef DOS_NT | |
869 | /* "/" is not considered a root directory on DOS_NT, so using "/" | |
870 | here causes an infinite recursion in, e.g., the following: | |
871 | ||
872 | (let (default-directory) | |
873 | (expand-file-name "a")) | |
874 | ||
875 | To avoid this, we set default_directory to the root of the | |
876 | current drive. */ | |
877 | extern char *emacs_root_dir (void); | |
878 | ||
879 | default_directory = build_string (emacs_root_dir ()); | |
880 | #else | |
881 | default_directory = build_string ("/"); | |
882 | #endif | |
883 | } | |
58fc9587 | 884 | |
3b7f6e60 | 885 | if (!NILP (default_directory)) |
273e0829 | 886 | { |
3b7f6e60 | 887 | handler = Ffind_file_name_handler (default_directory, Qexpand_file_name); |
273e0829 | 888 | if (!NILP (handler)) |
3b7f6e60 | 889 | return call3 (handler, Qexpand_file_name, name, default_directory); |
273e0829 | 890 | } |
0bf2eed2 | 891 | |
5b5a2ea1 SM |
892 | { |
893 | unsigned char *o = SDATA (default_directory); | |
894 | ||
895 | /* Make sure DEFAULT_DIRECTORY is properly expanded. | |
896 | It would be better to do this down below where we actually use | |
897 | default_directory. Unfortunately, calling Fexpand_file_name recursively | |
898 | could invoke GC, and the strings might be relocated. This would | |
899 | be annoying because we have pointers into strings lying around | |
900 | that would need adjusting, and people would add new pointers to | |
901 | the code and forget to adjust them, resulting in intermittent bugs. | |
902 | Putting this call here avoids all that crud. | |
903 | ||
904 | The EQ test avoids infinite recursion. */ | |
905 | if (! NILP (default_directory) && !EQ (default_directory, name) | |
906 | /* Save time in some common cases - as long as default_directory | |
907 | is not relative, it can be canonicalized with name below (if it | |
908 | is needed at all) without requiring it to be expanded now. */ | |
01937013 | 909 | #ifdef DOS_NT |
5b5a2ea1 SM |
910 | /* Detect MSDOS file names with drive specifiers. */ |
911 | && ! (IS_DRIVE (o[0]) && IS_DEVICE_SEP (o[1]) | |
912 | && IS_DIRECTORY_SEP (o[2])) | |
199607e4 | 913 | #ifdef WINDOWSNT |
5b5a2ea1 SM |
914 | /* Detect Windows file names in UNC format. */ |
915 | && ! (IS_DIRECTORY_SEP (o[0]) && IS_DIRECTORY_SEP (o[1])) | |
01937013 | 916 | #endif |
199607e4 RS |
917 | #else /* not DOS_NT */ |
918 | /* Detect Unix absolute file names (/... alone is not absolute on | |
919 | DOS or Windows). */ | |
5b5a2ea1 | 920 | && ! (IS_DIRECTORY_SEP (o[0])) |
199607e4 | 921 | #endif /* not DOS_NT */ |
5b5a2ea1 SM |
922 | ) |
923 | { | |
924 | struct gcpro gcpro1; | |
f14b1c68 | 925 | |
5b5a2ea1 SM |
926 | GCPRO1 (name); |
927 | default_directory = Fexpand_file_name (default_directory, Qnil); | |
928 | UNGCPRO; | |
929 | } | |
930 | } | |
4c3c22f3 | 931 | name = FILE_SYSTEM_CASE (name); |
2b046a72 | 932 | multibyte = STRING_MULTIBYTE (name); |
6d060996 KH |
933 | if (multibyte != STRING_MULTIBYTE (default_directory)) |
934 | { | |
935 | if (multibyte) | |
936 | default_directory = string_to_multibyte (default_directory); | |
937 | else | |
938 | { | |
939 | name = string_to_multibyte (name); | |
940 | multibyte = 1; | |
941 | } | |
942 | } | |
943 | ||
565f0b98 | 944 | /* Make a local copy of nm[] to protect it from GC in DECODE_FILE below. */ |
0f3f018c CY |
945 | nm = (unsigned char *) alloca (SBYTES (name) + 1); |
946 | bcopy (SDATA (name), nm, SBYTES (name) + 1); | |
199607e4 | 947 | |
565f0b98 | 948 | #ifdef DOS_NT |
f0f95d31 RS |
949 | /* Note if special escape prefix is present, but remove for now. */ |
950 | if (nm[0] == '/' && nm[1] == ':') | |
951 | { | |
952 | is_escaped = 1; | |
953 | nm += 2; | |
954 | } | |
955 | ||
199607e4 | 956 | /* Find and remove drive specifier if present; this makes nm absolute |
f0f95d31 RS |
957 | even if the rest of the name appears to be relative. Only look for |
958 | drive specifier at the beginning. */ | |
959 | if (IS_DRIVE (nm[0]) && IS_DEVICE_SEP (nm[1])) | |
960 | { | |
961 | drive = nm[0]; | |
962 | nm += 2; | |
963 | } | |
bb1ff1f4 GV |
964 | |
965 | #ifdef WINDOWSNT | |
966 | /* If we see "c://somedir", we want to strip the first slash after the | |
967 | colon when stripping the drive letter. Otherwise, this expands to | |
968 | "//somedir". */ | |
969 | if (drive && IS_DIRECTORY_SEP (nm[0]) && IS_DIRECTORY_SEP (nm[1])) | |
970 | nm++; | |
4c3c22f3 | 971 | |
199607e4 RS |
972 | /* Discard any previous drive specifier if nm is now in UNC format. */ |
973 | if (IS_DIRECTORY_SEP (nm[0]) && IS_DIRECTORY_SEP (nm[1])) | |
974 | { | |
975 | drive = 0; | |
976 | } | |
5b5a2ea1 SM |
977 | #endif /* WINDOWSNT */ |
978 | #endif /* DOS_NT */ | |
199607e4 | 979 | |
214378ec GM |
980 | /* If nm is absolute, look for `/./' or `/../' or `//''sequences; if |
981 | none are found, we can probably return right away. We will avoid | |
982 | allocating a new string if name is already fully expanded. */ | |
570d7624 | 983 | if ( |
5e570b75 | 984 | IS_DIRECTORY_SEP (nm[0]) |
199607e4 | 985 | #ifdef MSDOS |
f0f95d31 | 986 | && drive && !is_escaped |
199607e4 RS |
987 | #endif |
988 | #ifdef WINDOWSNT | |
f0f95d31 | 989 | && (drive || IS_DIRECTORY_SEP (nm[1])) && !is_escaped |
199607e4 | 990 | #endif |
570d7624 JB |
991 | ) |
992 | { | |
f14b1c68 JB |
993 | /* If it turns out that the filename we want to return is just a |
994 | suffix of FILENAME, we don't need to go through and edit | |
995 | things; we just need to construct a new string using data | |
996 | starting at the middle of FILENAME. If we set lose to a | |
997 | non-zero value, that means we've discovered that we can't do | |
998 | that cool trick. */ | |
999 | int lose = 0; | |
5b5a2ea1 | 1000 | unsigned char *p = nm; |
f14b1c68 | 1001 | |
570d7624 JB |
1002 | while (*p) |
1003 | { | |
199607e4 | 1004 | /* Since we know the name is absolute, we can assume that each |
c77d647e JB |
1005 | element starts with a "/". */ |
1006 | ||
c77d647e | 1007 | /* "." and ".." are hairy. */ |
5e570b75 | 1008 | if (IS_DIRECTORY_SEP (p[0]) |
c77d647e | 1009 | && p[1] == '.' |
5e570b75 | 1010 | && (IS_DIRECTORY_SEP (p[2]) |
c77d647e | 1011 | || p[2] == 0 |
5e570b75 | 1012 | || (p[2] == '.' && (IS_DIRECTORY_SEP (p[3]) |
c77d647e | 1013 | || p[3] == 0)))) |
570d7624 | 1014 | lose = 1; |
214378ec GM |
1015 | /* We want to replace multiple `/' in a row with a single |
1016 | slash. */ | |
1017 | else if (p > nm | |
1018 | && IS_DIRECTORY_SEP (p[0]) | |
1019 | && IS_DIRECTORY_SEP (p[1])) | |
1020 | lose = 1; | |
570d7624 JB |
1021 | p++; |
1022 | } | |
1023 | if (!lose) | |
1024 | { | |
199607e4 RS |
1025 | #ifdef DOS_NT |
1026 | /* Make sure directories are all separated with / or \ as | |
1027 | desired, but avoid allocation of a new string when not | |
1028 | required. */ | |
1029 | CORRECT_DIR_SEPS (nm); | |
1030 | #ifdef WINDOWSNT | |
1031 | if (IS_DIRECTORY_SEP (nm[1])) | |
1032 | { | |
d5db4077 | 1033 | if (strcmp (nm, SDATA (name)) != 0) |
2b046a72 | 1034 | name = make_specified_string (nm, -1, strlen (nm), multibyte); |
199607e4 RS |
1035 | } |
1036 | else | |
1037 | #endif | |
1038 | /* drive must be set, so this is okay */ | |
d5db4077 | 1039 | if (strcmp (nm - 2, SDATA (name)) != 0) |
199607e4 | 1040 | { |
3f817c73 KH |
1041 | char temp[] = " :"; |
1042 | ||
2b046a72 | 1043 | name = make_specified_string (nm, -1, p - nm, multibyte); |
3f817c73 KH |
1044 | temp[0] = DRIVE_LETTER (drive); |
1045 | name = concat2 (build_string (temp), name); | |
199607e4 RS |
1046 | } |
1047 | return name; | |
1048 | #else /* not DOS_NT */ | |
565f0b98 | 1049 | if (strcmp (nm, SDATA (name)) == 0) |
570d7624 | 1050 | return name; |
2b046a72 | 1051 | return make_specified_string (nm, -1, strlen (nm), multibyte); |
5e570b75 | 1052 | #endif /* not DOS_NT */ |
570d7624 JB |
1053 | } |
1054 | } | |
1055 | ||
199607e4 RS |
1056 | /* At this point, nm might or might not be an absolute file name. We |
1057 | need to expand ~ or ~user if present, otherwise prefix nm with | |
1058 | default_directory if nm is not absolute, and finally collapse /./ | |
1059 | and /foo/../ sequences. | |
1060 | ||
1061 | We set newdir to be the appropriate prefix if one is needed: | |
1062 | - the relevant user directory if nm starts with ~ or ~user | |
1063 | - the specified drive's working dir (DOS/NT only) if nm does not | |
1064 | start with / | |
1065 | - the value of default_directory. | |
1066 | ||
1067 | Note that these prefixes are not guaranteed to be absolute (except | |
1068 | for the working dir of a drive). Therefore, to ensure we always | |
1069 | return an absolute name, if the final prefix is not absolute we | |
1070 | append it to the current working directory. */ | |
570d7624 JB |
1071 | |
1072 | newdir = 0; | |
1073 | ||
1074 | if (nm[0] == '~') /* prefix ~ */ | |
c77d647e | 1075 | { |
5e570b75 | 1076 | if (IS_DIRECTORY_SEP (nm[1]) |
c77d647e JB |
1077 | || nm[1] == 0) /* ~ by itself */ |
1078 | { | |
6d557778 EZ |
1079 | Lisp_Object tem; |
1080 | ||
c77d647e JB |
1081 | if (!(newdir = (unsigned char *) egetenv ("HOME"))) |
1082 | newdir = (unsigned char *) ""; | |
199607e4 | 1083 | nm++; |
6d557778 EZ |
1084 | /* egetenv may return a unibyte string, which will bite us since |
1085 | we expect the directory to be multibyte. */ | |
9c06a1f3 EZ |
1086 | tem = build_string (newdir); |
1087 | if (!STRING_MULTIBYTE (tem)) | |
1088 | { | |
1089 | hdir = DECODE_FILE (tem); | |
1090 | newdir = SDATA (hdir); | |
1091 | } | |
5e570b75 | 1092 | #ifdef DOS_NT |
9a1dc3be | 1093 | collapse_newdir = 0; |
4c3c22f3 | 1094 | #endif |
c77d647e JB |
1095 | } |
1096 | else /* ~user/filename */ | |
1097 | { | |
5b5a2ea1 | 1098 | unsigned char *o, *p; |
7c2fb837 | 1099 | for (p = nm; *p && (!IS_DIRECTORY_SEP (*p)); p++); |
5b5a2ea1 | 1100 | o = alloca (p - nm + 1); |
c77d647e JB |
1101 | bcopy ((char *) nm, o, p - nm); |
1102 | o [p - nm] = 0; | |
1103 | ||
67c08d6c | 1104 | BLOCK_INPUT; |
c77d647e | 1105 | pw = (struct passwd *) getpwnam (o + 1); |
67c08d6c | 1106 | UNBLOCK_INPUT; |
c77d647e JB |
1107 | if (pw) |
1108 | { | |
1109 | newdir = (unsigned char *) pw -> pw_dir; | |
c77d647e | 1110 | nm = p; |
199607e4 | 1111 | #ifdef DOS_NT |
9a1dc3be | 1112 | collapse_newdir = 0; |
199607e4 | 1113 | #endif |
c77d647e | 1114 | } |
e5d77022 | 1115 | |
c77d647e JB |
1116 | /* If we don't find a user of that name, leave the name |
1117 | unchanged; don't move nm forward to p. */ | |
1118 | } | |
1119 | } | |
570d7624 | 1120 | |
5e570b75 | 1121 | #ifdef DOS_NT |
199607e4 RS |
1122 | /* On DOS and Windows, nm is absolute if a drive name was specified; |
1123 | use the drive's current directory as the prefix if needed. */ | |
1124 | if (!newdir && drive) | |
1125 | { | |
1126 | /* Get default directory if needed to make nm absolute. */ | |
1127 | if (!IS_DIRECTORY_SEP (nm[0])) | |
1128 | { | |
1129 | newdir = alloca (MAXPATHLEN + 1); | |
1130 | if (!getdefdir (toupper (drive) - 'A' + 1, newdir)) | |
1131 | newdir = NULL; | |
1132 | } | |
1133 | if (!newdir) | |
1134 | { | |
1135 | /* Either nm starts with /, or drive isn't mounted. */ | |
1136 | newdir = alloca (4); | |
f94988a7 | 1137 | newdir[0] = DRIVE_LETTER (drive); |
199607e4 RS |
1138 | newdir[1] = ':'; |
1139 | newdir[2] = '/'; | |
1140 | newdir[3] = 0; | |
1141 | } | |
1142 | } | |
5e570b75 | 1143 | #endif /* DOS_NT */ |
199607e4 RS |
1144 | |
1145 | /* Finally, if no prefix has been specified and nm is not absolute, | |
1146 | then it must be expanded relative to default_directory. */ | |
1147 | ||
34097368 | 1148 | if (1 |
199607e4 RS |
1149 | #ifndef DOS_NT |
1150 | /* /... alone is not absolute on DOS and Windows. */ | |
34097368 | 1151 | && !IS_DIRECTORY_SEP (nm[0]) |
199607e4 RS |
1152 | #endif |
1153 | #ifdef WINDOWSNT | |
34097368 | 1154 | && !(IS_DIRECTORY_SEP (nm[0]) && IS_DIRECTORY_SEP (nm[1])) |
199607e4 | 1155 | #endif |
570d7624 JB |
1156 | && !newdir) |
1157 | { | |
d5db4077 | 1158 | newdir = SDATA (default_directory); |
f0f95d31 RS |
1159 | #ifdef DOS_NT |
1160 | /* Note if special escape prefix is present, but remove for now. */ | |
1161 | if (newdir[0] == '/' && newdir[1] == ':') | |
1162 | { | |
1163 | is_escaped = 1; | |
1164 | newdir += 2; | |
1165 | } | |
1166 | #endif | |
570d7624 JB |
1167 | } |
1168 | ||
5e570b75 | 1169 | #ifdef DOS_NT |
199607e4 RS |
1170 | if (newdir) |
1171 | { | |
1172 | /* First ensure newdir is an absolute name. */ | |
1173 | if ( | |
1174 | /* Detect MSDOS file names with drive specifiers. */ | |
1175 | ! (IS_DRIVE (newdir[0]) | |
1176 | && IS_DEVICE_SEP (newdir[1]) && IS_DIRECTORY_SEP (newdir[2])) | |
1177 | #ifdef WINDOWSNT | |
1178 | /* Detect Windows file names in UNC format. */ | |
1179 | && ! (IS_DIRECTORY_SEP (newdir[0]) && IS_DIRECTORY_SEP (newdir[1])) | |
1180 | #endif | |
1181 | ) | |
1182 | { | |
1183 | /* Effectively, let newdir be (expand-file-name newdir cwd). | |
1184 | Because of the admonition against calling expand-file-name | |
1185 | when we have pointers into lisp strings, we accomplish this | |
1186 | indirectly by prepending newdir to nm if necessary, and using | |
1187 | cwd (or the wd of newdir's drive) as the new newdir. */ | |
1188 | ||
c70a4df6 | 1189 | if (IS_DRIVE (newdir[0]) && IS_DEVICE_SEP (newdir[1])) |
199607e4 RS |
1190 | { |
1191 | drive = newdir[0]; | |
1192 | newdir += 2; | |
1193 | } | |
1194 | if (!IS_DIRECTORY_SEP (nm[0])) | |
1195 | { | |
1196 | char * tmp = alloca (strlen (newdir) + strlen (nm) + 2); | |
1197 | file_name_as_directory (tmp, newdir); | |
1198 | strcat (tmp, nm); | |
1199 | nm = tmp; | |
1200 | } | |
1201 | newdir = alloca (MAXPATHLEN + 1); | |
1202 | if (drive) | |
1203 | { | |
1204 | if (!getdefdir (toupper (drive) - 'A' + 1, newdir)) | |
1205 | newdir = "/"; | |
1206 | } | |
1207 | else | |
1208 | getwd (newdir); | |
1209 | } | |
1210 | ||
1211 | /* Strip off drive name from prefix, if present. */ | |
c70a4df6 | 1212 | if (IS_DRIVE (newdir[0]) && IS_DEVICE_SEP (newdir[1])) |
199607e4 RS |
1213 | { |
1214 | drive = newdir[0]; | |
1215 | newdir += 2; | |
1216 | } | |
1217 | ||
1218 | /* Keep only a prefix from newdir if nm starts with slash | |
82330e7f | 1219 | (//server/share for UNC, nothing otherwise). */ |
9a1dc3be | 1220 | if (IS_DIRECTORY_SEP (nm[0]) && collapse_newdir) |
199607e4 RS |
1221 | { |
1222 | #ifdef WINDOWSNT | |
1223 | if (IS_DIRECTORY_SEP (newdir[0]) && IS_DIRECTORY_SEP (newdir[1])) | |
1224 | { | |
f5acc071 | 1225 | unsigned char *p; |
199607e4 RS |
1226 | newdir = strcpy (alloca (strlen (newdir) + 1), newdir); |
1227 | p = newdir + 2; | |
1228 | while (*p && !IS_DIRECTORY_SEP (*p)) p++; | |
1229 | p++; | |
1230 | while (*p && !IS_DIRECTORY_SEP (*p)) p++; | |
1231 | *p = 0; | |
1232 | } | |
1233 | else | |
1234 | #endif | |
1235 | newdir = ""; | |
1236 | } | |
1237 | } | |
5e570b75 | 1238 | #endif /* DOS_NT */ |
199607e4 RS |
1239 | |
1240 | if (newdir) | |
bfb61299 | 1241 | { |
57676091 | 1242 | /* Get rid of any slash at the end of newdir, unless newdir is |
f0f95d31 | 1243 | just / or // (an incomplete UNC name). */ |
199607e4 | 1244 | length = strlen (newdir); |
f0f95d31 | 1245 | if (length > 1 && IS_DIRECTORY_SEP (newdir[length - 1]) |
57676091 RS |
1246 | #ifdef WINDOWSNT |
1247 | && !(length == 2 && IS_DIRECTORY_SEP (newdir[0])) | |
1248 | #endif | |
1249 | ) | |
bfb61299 JB |
1250 | { |
1251 | unsigned char *temp = (unsigned char *) alloca (length); | |
1252 | bcopy (newdir, temp, length - 1); | |
1253 | temp[length - 1] = 0; | |
1254 | newdir = temp; | |
1255 | } | |
1256 | tlen = length + 1; | |
1257 | } | |
1258 | else | |
1259 | tlen = 0; | |
570d7624 | 1260 | |
bfb61299 JB |
1261 | /* Now concatenate the directory and name to new space in the stack frame */ |
1262 | tlen += strlen (nm) + 1; | |
5e570b75 | 1263 | #ifdef DOS_NT |
f0f95d31 RS |
1264 | /* Reserve space for drive specifier and escape prefix, since either |
1265 | or both may need to be inserted. (The Microsoft x86 compiler | |
5e570b75 | 1266 | produces incorrect code if the following two lines are combined.) */ |
f0f95d31 RS |
1267 | target = (unsigned char *) alloca (tlen + 4); |
1268 | target += 4; | |
5e570b75 | 1269 | #else /* not DOS_NT */ |
570d7624 | 1270 | target = (unsigned char *) alloca (tlen); |
5e570b75 | 1271 | #endif /* not DOS_NT */ |
570d7624 JB |
1272 | *target = 0; |
1273 | ||
1274 | if (newdir) | |
1275 | { | |
5e570b75 | 1276 | if (nm[0] == 0 || IS_DIRECTORY_SEP (nm[0])) |
f5321b5c | 1277 | { |
3ea2d8b2 | 1278 | #ifdef DOS_NT |
f5321b5c RS |
1279 | /* If newdir is effectively "C:/", then the drive letter will have |
1280 | been stripped and newdir will be "/". Concatenating with an | |
1281 | absolute directory in nm produces "//", which will then be | |
1282 | incorrectly treated as a network share. Ignore newdir in | |
1283 | this case (keeping the drive letter). */ | |
efdc16c9 | 1284 | if (!(drive && nm[0] && IS_DIRECTORY_SEP (newdir[0]) |
f5321b5c RS |
1285 | && newdir[1] == '\0')) |
1286 | #endif | |
1287 | strcpy (target, newdir); | |
1288 | } | |
570d7624 | 1289 | else |
c77d647e | 1290 | file_name_as_directory (target, newdir); |
570d7624 JB |
1291 | } |
1292 | ||
1293 | strcat (target, nm); | |
199607e4 | 1294 | |
214378ec GM |
1295 | /* Now canonicalize by removing `//', `/.' and `/foo/..' if they |
1296 | appear. */ | |
5b5a2ea1 SM |
1297 | { |
1298 | unsigned char *p = target; | |
1299 | unsigned char *o = target; | |
570d7624 | 1300 | |
5b5a2ea1 SM |
1301 | while (*p) |
1302 | { | |
5b5a2ea1 SM |
1303 | if (!IS_DIRECTORY_SEP (*p)) |
1304 | { | |
1305 | *o++ = *p++; | |
1306 | } | |
1307 | else if (p[1] == '.' | |
1308 | && (IS_DIRECTORY_SEP (p[2]) | |
1309 | || p[2] == 0)) | |
1310 | { | |
1311 | /* If "/." is the entire filename, keep the "/". Otherwise, | |
1312 | just delete the whole "/.". */ | |
1313 | if (o == target && p[2] == '\0') | |
1314 | *o++ = *p; | |
1315 | p += 2; | |
1316 | } | |
1317 | else if (p[1] == '.' && p[2] == '.' | |
1318 | /* `/../' is the "superroot" on certain file systems. | |
1319 | Turned off on DOS_NT systems because they have no | |
1320 | "superroot" and because this causes us to produce | |
1321 | file names like "d:/../foo" which fail file-related | |
1322 | functions of the underlying OS. (To reproduce, try a | |
1323 | long series of "../../" in default_directory, longer | |
1324 | than the number of levels from the root.) */ | |
aa4060b9 | 1325 | #ifndef DOS_NT |
5b5a2ea1 | 1326 | && o != target |
aa4060b9 | 1327 | #endif |
5b5a2ea1 SM |
1328 | && (IS_DIRECTORY_SEP (p[3]) || p[3] == 0)) |
1329 | { | |
972ed246 JR |
1330 | #ifdef WINDOWSNT |
1331 | unsigned char *prev_o = o; | |
1332 | #endif | |
5b5a2ea1 SM |
1333 | while (o != target && (--o) && !IS_DIRECTORY_SEP (*o)) |
1334 | ; | |
972ed246 JR |
1335 | #ifdef WINDOWSNT |
1336 | /* Don't go below server level in UNC filenames. */ | |
1337 | if (o == target + 1 && IS_DIRECTORY_SEP (*o) | |
1338 | && IS_DIRECTORY_SEP (*target)) | |
1339 | o = prev_o; | |
1340 | else | |
1341 | #endif | |
5b5a2ea1 SM |
1342 | /* Keep initial / only if this is the whole name. */ |
1343 | if (o == target && IS_ANY_SEP (*o) && p[3] == 0) | |
1344 | ++o; | |
1345 | p += 3; | |
1346 | } | |
1347 | else if (p > target && IS_DIRECTORY_SEP (p[1])) | |
1348 | /* Collapse multiple `/' in a row. */ | |
1349 | p++; | |
1350 | else | |
1351 | { | |
1352 | *o++ = *p++; | |
1353 | } | |
5b5a2ea1 | 1354 | } |
570d7624 | 1355 | |
5e570b75 | 1356 | #ifdef DOS_NT |
5b5a2ea1 | 1357 | /* At last, set drive name. */ |
5e570b75 | 1358 | #ifdef WINDOWSNT |
5b5a2ea1 SM |
1359 | /* Except for network file name. */ |
1360 | if (!(IS_DIRECTORY_SEP (target[0]) && IS_DIRECTORY_SEP (target[1]))) | |
5e570b75 | 1361 | #endif /* WINDOWSNT */ |
5b5a2ea1 SM |
1362 | { |
1363 | if (!drive) abort (); | |
1364 | target -= 2; | |
1365 | target[0] = DRIVE_LETTER (drive); | |
1366 | target[1] = ':'; | |
1367 | } | |
1368 | /* Reinsert the escape prefix if required. */ | |
1369 | if (is_escaped) | |
1370 | { | |
1371 | target -= 2; | |
1372 | target[0] = '/'; | |
1373 | target[1] = ':'; | |
1374 | } | |
1375 | CORRECT_DIR_SEPS (target); | |
5e570b75 | 1376 | #endif /* DOS_NT */ |
4c3c22f3 | 1377 | |
5b5a2ea1 SM |
1378 | result = make_specified_string (target, -1, o - target, multibyte); |
1379 | } | |
beb402de KG |
1380 | |
1381 | /* Again look to see if the file name has special constructs in it | |
1382 | and perhaps call the corresponding file handler. This is needed | |
1383 | for filenames such as "/foo/../user@host:/bar/../baz". Expanding | |
1384 | the ".." component gives us "/user@host:/bar/../baz" which needs | |
1385 | to be expanded again. */ | |
1386 | handler = Ffind_file_name_handler (result, Qexpand_file_name); | |
1387 | if (!NILP (handler)) | |
1388 | return call3 (handler, Qexpand_file_name, result, default_directory); | |
1389 | ||
1390 | return result; | |
570d7624 | 1391 | } |
5e570b75 | 1392 | |
4887597a EZ |
1393 | #if 0 |
1394 | /* PLEASE DO NOT DELETE THIS COMMENTED-OUT VERSION! | |
1395 | This is the old version of expand-file-name, before it was thoroughly | |
1396 | rewritten for Emacs 10.31. We leave this version here commented-out, | |
1397 | because the code is very complex and likely to have subtle bugs. If | |
1398 | bugs _are_ found, it might be of interest to look at the old code and | |
1399 | see what did it do in the relevant situation. | |
1400 | ||
1401 | Don't remove this code: it's true that it will be accessible via CVS, | |
1402 | but a few years from deletion, people will forget it is there. */ | |
1403 | ||
1404 | /* Changed this DEFUN to a DEAFUN, so as not to confuse `make-docfile'. */ | |
1405 | DEAFUN ("expand-file-name", Fexpand_file_name, Sexpand_file_name, 1, 2, 0, | |
1406 | "Convert FILENAME to absolute, and canonicalize it.\n\ | |
1407 | Second arg DEFAULT is directory to start with if FILENAME is relative\n\ | |
c70a4df6 | 1408 | \(does not start with slash); if DEFAULT is nil or missing,\n\ |
4887597a EZ |
1409 | the current buffer's value of default-directory is used.\n\ |
1410 | Filenames containing `.' or `..' as components are simplified;\n\ | |
1411 | initial `~/' expands to your home directory.\n\ | |
1412 | See also the function `substitute-in-file-name'.") | |
1413 | (name, defalt) | |
1414 | Lisp_Object name, defalt; | |
1415 | { | |
1416 | unsigned char *nm; | |
1417 | ||
1418 | register unsigned char *newdir, *p, *o; | |
1419 | int tlen; | |
1420 | unsigned char *target; | |
1421 | struct passwd *pw; | |
1422 | int lose; | |
4887597a | 1423 | |
b7826503 | 1424 | CHECK_STRING (name); |
d5db4077 | 1425 | nm = SDATA (name); |
4887597a EZ |
1426 | |
1427 | /* If nm is absolute, flush ...// and detect /./ and /../. | |
1428 | If no /./ or /../ we can return right away. */ | |
7c2fb837 | 1429 | if (nm[0] == '/') |
4887597a EZ |
1430 | { |
1431 | p = nm; | |
1432 | lose = 0; | |
1433 | while (*p) | |
1434 | { | |
1435 | if (p[0] == '/' && p[1] == '/' | |
4887597a EZ |
1436 | ) |
1437 | nm = p + 1; | |
1438 | if (p[0] == '/' && p[1] == '~') | |
1439 | nm = p + 1, lose = 1; | |
1440 | if (p[0] == '/' && p[1] == '.' | |
1441 | && (p[2] == '/' || p[2] == 0 | |
1442 | || (p[2] == '.' && (p[3] == '/' || p[3] == 0)))) | |
1443 | lose = 1; | |
4887597a EZ |
1444 | p++; |
1445 | } | |
1446 | if (!lose) | |
1447 | { | |
d5db4077 | 1448 | if (nm == SDATA (name)) |
4887597a EZ |
1449 | return name; |
1450 | return build_string (nm); | |
1451 | } | |
1452 | } | |
1453 | ||
1454 | /* Now determine directory to start with and put it in NEWDIR */ | |
1455 | ||
1456 | newdir = 0; | |
1457 | ||
1458 | if (nm[0] == '~') /* prefix ~ */ | |
7c2fb837 | 1459 | if (nm[1] == '/' || nm[1] == 0)/* ~/filename */ |
4887597a EZ |
1460 | { |
1461 | if (!(newdir = (unsigned char *) egetenv ("HOME"))) | |
1462 | newdir = (unsigned char *) ""; | |
1463 | nm++; | |
4887597a EZ |
1464 | } |
1465 | else /* ~user/filename */ | |
1466 | { | |
1467 | /* Get past ~ to user */ | |
1468 | unsigned char *user = nm + 1; | |
1469 | /* Find end of name. */ | |
1470 | unsigned char *ptr = (unsigned char *) index (user, '/'); | |
1471 | int len = ptr ? ptr - user : strlen (user); | |
4887597a EZ |
1472 | /* Copy the user name into temp storage. */ |
1473 | o = (unsigned char *) alloca (len + 1); | |
1474 | bcopy ((char *) user, o, len); | |
1475 | o[len] = 0; | |
1476 | ||
1477 | /* Look up the user name. */ | |
67c08d6c | 1478 | BLOCK_INPUT; |
4887597a | 1479 | pw = (struct passwd *) getpwnam (o + 1); |
67c08d6c | 1480 | UNBLOCK_INPUT; |
4887597a EZ |
1481 | if (!pw) |
1482 | error ("\"%s\" isn't a registered user", o + 1); | |
1483 | ||
1484 | newdir = (unsigned char *) pw->pw_dir; | |
1485 | ||
1486 | /* Discard the user name from NM. */ | |
1487 | nm += len; | |
1488 | } | |
1489 | ||
7c2fb837 | 1490 | if (nm[0] != '/' && !newdir) |
4887597a EZ |
1491 | { |
1492 | if (NILP (defalt)) | |
1493 | defalt = current_buffer->directory; | |
b7826503 | 1494 | CHECK_STRING (defalt); |
d5db4077 | 1495 | newdir = SDATA (defalt); |
4887597a EZ |
1496 | } |
1497 | ||
1498 | /* Now concatenate the directory and name to new space in the stack frame */ | |
1499 | ||
1500 | tlen = (newdir ? strlen (newdir) + 1 : 0) + strlen (nm) + 1; | |
1501 | target = (unsigned char *) alloca (tlen); | |
1502 | *target = 0; | |
1503 | ||
1504 | if (newdir) | |
1505 | { | |
4887597a EZ |
1506 | if (nm[0] == 0 || nm[0] == '/') |
1507 | strcpy (target, newdir); | |
1508 | else | |
4887597a EZ |
1509 | file_name_as_directory (target, newdir); |
1510 | } | |
1511 | ||
1512 | strcat (target, nm); | |
4887597a EZ |
1513 | |
1514 | /* Now canonicalize by removing /. and /foo/.. if they appear */ | |
1515 | ||
1516 | p = target; | |
1517 | o = target; | |
1518 | ||
1519 | while (*p) | |
1520 | { | |
4887597a EZ |
1521 | if (*p != '/') |
1522 | { | |
1523 | *o++ = *p++; | |
1524 | } | |
1525 | else if (!strncmp (p, "//", 2) | |
4887597a EZ |
1526 | ) |
1527 | { | |
1528 | o = target; | |
1529 | p++; | |
1530 | } | |
994a7262 RS |
1531 | else if (p[0] == '/' && p[1] == '.' |
1532 | && (p[2] == '/' || p[2] == 0)) | |
4887597a EZ |
1533 | p += 2; |
1534 | else if (!strncmp (p, "/..", 3) | |
1535 | /* `/../' is the "superroot" on certain file systems. */ | |
1536 | && o != target | |
1537 | && (p[3] == '/' || p[3] == 0)) | |
1538 | { | |
1539 | while (o != target && *--o != '/') | |
1540 | ; | |
4887597a EZ |
1541 | if (o == target && *o == '/') |
1542 | ++o; | |
1543 | p += 3; | |
1544 | } | |
1545 | else | |
1546 | { | |
1547 | *o++ = *p++; | |
1548 | } | |
4887597a EZ |
1549 | } |
1550 | ||
1551 | return make_string (target, o - target); | |
1552 | } | |
1553 | #endif | |
570d7624 | 1554 | \f |
c70a4df6 SM |
1555 | /* If /~ or // appears, discard everything through first slash. */ |
1556 | static int | |
1557 | file_name_absolute_p (filename) | |
1558 | const unsigned char *filename; | |
1559 | { | |
1560 | return | |
1561 | (IS_DIRECTORY_SEP (*filename) || *filename == '~' | |
c70a4df6 SM |
1562 | #ifdef DOS_NT |
1563 | || (IS_DRIVE (*filename) && IS_DEVICE_SEP (filename[1]) | |
1564 | && IS_DIRECTORY_SEP (filename[2])) | |
1565 | #endif | |
1566 | ); | |
1567 | } | |
1568 | ||
1569 | static unsigned char * | |
1570 | search_embedded_absfilename (nm, endp) | |
1571 | unsigned char *nm, *endp; | |
1572 | { | |
1573 | unsigned char *p, *s; | |
1574 | ||
1575 | for (p = nm + 1; p < endp; p++) | |
1576 | { | |
1577 | if ((0 | |
c70a4df6 SM |
1578 | || IS_DIRECTORY_SEP (p[-1])) |
1579 | && file_name_absolute_p (p) | |
e39a993c | 1580 | #if defined (WINDOWSNT) || defined(CYGWIN) |
c70a4df6 SM |
1581 | /* // at start of file name is meaningful in Apollo, |
1582 | WindowsNT and Cygwin systems. */ | |
f34574c6 | 1583 | && !(IS_DIRECTORY_SEP (p[0]) && p - 1 == nm) |
e39a993c | 1584 | #endif /* not (WINDOWSNT || CYGWIN) */ |
c70a4df6 SM |
1585 | ) |
1586 | { | |
7c2fb837 | 1587 | for (s = p; *s && (!IS_DIRECTORY_SEP (*s)); s++); |
c70a4df6 SM |
1588 | if (p[0] == '~' && s > p + 1) /* we've got "/~something/" */ |
1589 | { | |
1590 | unsigned char *o = alloca (s - p + 1); | |
1591 | struct passwd *pw; | |
1592 | bcopy (p, o, s - p); | |
1593 | o [s - p] = 0; | |
1594 | ||
1595 | /* If we have ~user and `user' exists, discard | |
1596 | everything up to ~. But if `user' does not exist, leave | |
1597 | ~user alone, it might be a literal file name. */ | |
67c08d6c YM |
1598 | BLOCK_INPUT; |
1599 | pw = getpwnam (o + 1); | |
1600 | UNBLOCK_INPUT; | |
1601 | if (pw) | |
c70a4df6 | 1602 | return p; |
c70a4df6 SM |
1603 | } |
1604 | else | |
1605 | return p; | |
1606 | } | |
1607 | } | |
1608 | return NULL; | |
1609 | } | |
1610 | ||
570d7624 | 1611 | DEFUN ("substitute-in-file-name", Fsubstitute_in_file_name, |
8c1a1077 PJ |
1612 | Ssubstitute_in_file_name, 1, 1, 0, |
1613 | doc: /* Substitute environment variables referred to in FILENAME. | |
1614 | `$FOO' where FOO is an environment variable name means to substitute | |
1615 | the value of that variable. The variable name should be terminated | |
1616 | with a character not a letter, digit or underscore; otherwise, enclose | |
1617 | the entire variable name in braces. | |
c68845e0 GM |
1618 | |
1619 | If `/~' appears, all of FILENAME through that `/' is discarded. | |
1620 | If `//' appears, everything up to and including the first of | |
1621 | those `/' is discarded. */) | |
8c1a1077 | 1622 | (filename) |
3b7f6e60 | 1623 | Lisp_Object filename; |
570d7624 JB |
1624 | { |
1625 | unsigned char *nm; | |
1626 | ||
1627 | register unsigned char *s, *p, *o, *x, *endp; | |
6bbd7a29 | 1628 | unsigned char *target = NULL; |
570d7624 JB |
1629 | int total = 0; |
1630 | int substituted = 0; | |
58aec0d6 | 1631 | int multibyte; |
570d7624 | 1632 | unsigned char *xnm; |
8ce069f5 | 1633 | Lisp_Object handler; |
570d7624 | 1634 | |
b7826503 | 1635 | CHECK_STRING (filename); |
570d7624 | 1636 | |
58aec0d6 JR |
1637 | multibyte = STRING_MULTIBYTE (filename); |
1638 | ||
8ce069f5 RS |
1639 | /* If the file name has special constructs in it, |
1640 | call the corresponding file handler. */ | |
3b7f6e60 | 1641 | handler = Ffind_file_name_handler (filename, Qsubstitute_in_file_name); |
8ce069f5 | 1642 | if (!NILP (handler)) |
3b7f6e60 | 1643 | return call2 (handler, Qsubstitute_in_file_name, filename); |
8ce069f5 | 1644 | |
58aec0d6 JR |
1645 | /* Always work on a copy of the string, in case GC happens during |
1646 | decode of environment variables, causing the original Lisp_String | |
1647 | data to be relocated. */ | |
0f3f018c CY |
1648 | nm = (unsigned char *) alloca (SBYTES (filename) + 1); |
1649 | bcopy (SDATA (filename), nm, SBYTES (filename) + 1); | |
1650 | ||
58aec0d6 | 1651 | #ifdef DOS_NT |
199607e4 | 1652 | CORRECT_DIR_SEPS (nm); |
d5db4077 | 1653 | substituted = (strcmp (nm, SDATA (filename)) != 0); |
a5a1cc06 | 1654 | #endif |
d5db4077 | 1655 | endp = nm + SBYTES (filename); |
570d7624 | 1656 | |
82330e7f | 1657 | /* If /~ or // appears, discard everything through first slash. */ |
c70a4df6 SM |
1658 | p = search_embedded_absfilename (nm, endp); |
1659 | if (p) | |
1660 | /* Start over with the new string, so we check the file-name-handler | |
1661 | again. Important with filenames like "/home/foo//:/hello///there" | |
1662 | which whould substitute to "/:/hello///there" rather than "/there". */ | |
1663 | return Fsubstitute_in_file_name | |
58aec0d6 | 1664 | (make_specified_string (p, -1, endp - p, multibyte)); |
570d7624 JB |
1665 | |
1666 | /* See if any variables are substituted into the string | |
1667 | and find the total length of their values in `total' */ | |
1668 | ||
1669 | for (p = nm; p != endp;) | |
1670 | if (*p != '$') | |
1671 | p++; | |
1672 | else | |
1673 | { | |
1674 | p++; | |
1675 | if (p == endp) | |
1676 | goto badsubst; | |
1677 | else if (*p == '$') | |
1678 | { | |
1679 | /* "$$" means a single "$" */ | |
1680 | p++; | |
1681 | total -= 1; | |
1682 | substituted = 1; | |
1683 | continue; | |
1684 | } | |
1685 | else if (*p == '{') | |
1686 | { | |
1687 | o = ++p; | |
1688 | while (p != endp && *p != '}') p++; | |
1689 | if (*p != '}') goto missingclose; | |
1690 | s = p; | |
1691 | } | |
1692 | else | |
1693 | { | |
1694 | o = p; | |
1695 | while (p != endp && (isalnum (*p) || *p == '_')) p++; | |
1696 | s = p; | |
1697 | } | |
1698 | ||
1699 | /* Copy out the variable name */ | |
1700 | target = (unsigned char *) alloca (s - o + 1); | |
1701 | strncpy (target, o, s - o); | |
1702 | target[s - o] = 0; | |
5e570b75 | 1703 | #ifdef DOS_NT |
4c3c22f3 | 1704 | strupr (target); /* $home == $HOME etc. */ |
5e570b75 | 1705 | #endif /* DOS_NT */ |
570d7624 JB |
1706 | |
1707 | /* Get variable value */ | |
1708 | o = (unsigned char *) egetenv (target); | |
8d2ced53 | 1709 | if (o) |
58aec0d6 JR |
1710 | { |
1711 | /* Don't try to guess a maximum length - UTF8 can use up to | |
1712 | four bytes per character. This code is unlikely to run | |
1713 | in a situation that requires performance, so decoding the | |
1714 | env variables twice should be acceptable. Note that | |
1715 | decoding may cause a garbage collect. */ | |
1716 | Lisp_Object orig, decoded; | |
1717 | orig = make_unibyte_string (o, strlen (o)); | |
1718 | decoded = DECODE_FILE (orig); | |
1719 | total += SBYTES (decoded); | |
8d2ced53 SM |
1720 | substituted = 1; |
1721 | } | |
1722 | else if (*p == '}') | |
1723 | goto badvar; | |
570d7624 JB |
1724 | } |
1725 | ||
1726 | if (!substituted) | |
3b7f6e60 | 1727 | return filename; |
570d7624 JB |
1728 | |
1729 | /* If substitution required, recopy the string and do it */ | |
1730 | /* Make space in stack frame for the new copy */ | |
d5db4077 | 1731 | xnm = (unsigned char *) alloca (SBYTES (filename) + total + 1); |
570d7624 JB |
1732 | x = xnm; |
1733 | ||
1734 | /* Copy the rest of the name through, replacing $ constructs with values */ | |
1735 | for (p = nm; *p;) | |
1736 | if (*p != '$') | |
1737 | *x++ = *p++; | |
1738 | else | |
1739 | { | |
1740 | p++; | |
1741 | if (p == endp) | |
1742 | goto badsubst; | |
1743 | else if (*p == '$') | |
1744 | { | |
1745 | *x++ = *p++; | |
1746 | continue; | |
1747 | } | |
1748 | else if (*p == '{') | |
1749 | { | |
1750 | o = ++p; | |
1751 | while (p != endp && *p != '}') p++; | |
1752 | if (*p != '}') goto missingclose; | |
1753 | s = p++; | |
1754 | } | |
1755 | else | |
1756 | { | |
1757 | o = p; | |
1758 | while (p != endp && (isalnum (*p) || *p == '_')) p++; | |
1759 | s = p; | |
1760 | } | |
1761 | ||
1762 | /* Copy out the variable name */ | |
1763 | target = (unsigned char *) alloca (s - o + 1); | |
1764 | strncpy (target, o, s - o); | |
1765 | target[s - o] = 0; | |
5e570b75 | 1766 | #ifdef DOS_NT |
4c3c22f3 | 1767 | strupr (target); /* $home == $HOME etc. */ |
5e570b75 | 1768 | #endif /* DOS_NT */ |
570d7624 JB |
1769 | |
1770 | /* Get variable value */ | |
1771 | o = (unsigned char *) egetenv (target); | |
570d7624 | 1772 | if (!o) |
8d2ced53 SM |
1773 | { |
1774 | *x++ = '$'; | |
1775 | strcpy (x, target); x+= strlen (target); | |
1776 | } | |
60d67b83 RS |
1777 | else |
1778 | { | |
58aec0d6 JR |
1779 | Lisp_Object orig, decoded; |
1780 | int orig_length, decoded_length; | |
1781 | orig_length = strlen (o); | |
1782 | orig = make_unibyte_string (o, orig_length); | |
1783 | decoded = DECODE_FILE (orig); | |
1784 | decoded_length = SBYTES (decoded); | |
1785 | strncpy (x, SDATA (decoded), decoded_length); | |
1786 | x += decoded_length; | |
1787 | ||
1788 | /* If environment variable needed decoding, return value | |
1789 | needs to be multibyte. */ | |
1790 | if (decoded_length != orig_length | |
1791 | || strncmp (SDATA (decoded), o, orig_length)) | |
1792 | multibyte = 1; | |
60d67b83 | 1793 | } |
570d7624 JB |
1794 | } |
1795 | ||
1796 | *x = 0; | |
1797 | ||
82330e7f | 1798 | /* If /~ or // appears, discard everything through first slash. */ |
c70a4df6 SM |
1799 | while ((p = search_embedded_absfilename (xnm, x))) |
1800 | /* This time we do not start over because we've already expanded envvars | |
1801 | and replaced $$ with $. Maybe we should start over as well, but we'd | |
1802 | need to quote some $ to $$ first. */ | |
1803 | xnm = p; | |
570d7624 | 1804 | |
58aec0d6 | 1805 | return make_specified_string (xnm, -1, x - xnm, multibyte); |
570d7624 JB |
1806 | |
1807 | badsubst: | |
1808 | error ("Bad format environment-variable substitution"); | |
1809 | missingclose: | |
1810 | error ("Missing \"}\" in environment-variable substitution"); | |
1811 | badvar: | |
1812 | error ("Substituting nonexistent environment variable \"%s\"", target); | |
1813 | ||
1814 | /* NOTREACHED */ | |
6bbd7a29 | 1815 | return Qnil; |
570d7624 JB |
1816 | } |
1817 | \f | |
067ffa38 | 1818 | /* A slightly faster and more convenient way to get |
298b760e | 1819 | (directory-file-name (expand-file-name FOO)). */ |
067ffa38 | 1820 | |
570d7624 JB |
1821 | Lisp_Object |
1822 | expand_and_dir_to_file (filename, defdir) | |
1823 | Lisp_Object filename, defdir; | |
1824 | { | |
199607e4 | 1825 | register Lisp_Object absname; |
570d7624 | 1826 | |
199607e4 | 1827 | absname = Fexpand_file_name (filename, defdir); |
7c2fb837 | 1828 | |
199607e4 | 1829 | /* Remove final slash, if any (unless this is the root dir). |
570d7624 | 1830 | stat behaves differently depending! */ |
d5db4077 KR |
1831 | if (SCHARS (absname) > 1 |
1832 | && IS_DIRECTORY_SEP (SREF (absname, SBYTES (absname) - 1)) | |
1833 | && !IS_DEVICE_SEP (SREF (absname, SBYTES (absname)-2))) | |
ddc61f46 | 1834 | /* We cannot take shortcuts; they might be wrong for magic file names. */ |
199607e4 | 1835 | absname = Fdirectory_file_name (absname); |
199607e4 | 1836 | return absname; |
570d7624 JB |
1837 | } |
1838 | \f | |
3ed15d97 RS |
1839 | /* Signal an error if the file ABSNAME already exists. |
1840 | If INTERACTIVE is nonzero, ask the user whether to proceed, | |
1841 | and bypass the error if the user says to go ahead. | |
1842 | QUERYSTRING is a name for the action that is being considered | |
1843 | to alter the file. | |
de1d0127 | 1844 | |
3ed15d97 | 1845 | *STATPTR is used to store the stat information if the file exists. |
de1d0127 | 1846 | If the file does not exist, STATPTR->st_mode is set to 0. |
b8b29dc9 RS |
1847 | If STATPTR is null, we don't store into it. |
1848 | ||
1849 | If QUICK is nonzero, we ask for y or n, not yes or no. */ | |
3ed15d97 | 1850 | |
c4df73f9 | 1851 | void |
b8b29dc9 | 1852 | barf_or_query_if_file_exists (absname, querystring, interactive, statptr, quick) |
570d7624 JB |
1853 | Lisp_Object absname; |
1854 | unsigned char *querystring; | |
1855 | int interactive; | |
3ed15d97 | 1856 | struct stat *statptr; |
b8b29dc9 | 1857 | int quick; |
570d7624 | 1858 | { |
643c73b9 | 1859 | register Lisp_Object tem, encoded_filename; |
4018b5ef | 1860 | struct stat statbuf; |
570d7624 JB |
1861 | struct gcpro gcpro1; |
1862 | ||
643c73b9 RS |
1863 | encoded_filename = ENCODE_FILE (absname); |
1864 | ||
4018b5ef RS |
1865 | /* stat is a good way to tell whether the file exists, |
1866 | regardless of what access permissions it has. */ | |
f72b5416 | 1867 | if (lstat (SDATA (encoded_filename), &statbuf) >= 0) |
570d7624 JB |
1868 | { |
1869 | if (! interactive) | |
24b1ddad KS |
1870 | xsignal2 (Qfile_already_exists, |
1871 | build_string ("File already exists"), absname); | |
570d7624 | 1872 | GCPRO1 (absname); |
67e8e2b8 RS |
1873 | tem = format2 ("File %s already exists; %s anyway? ", |
1874 | absname, build_string (querystring)); | |
b8b29dc9 RS |
1875 | if (quick) |
1876 | tem = Fy_or_n_p (tem); | |
1877 | else | |
1878 | tem = do_yes_or_no_p (tem); | |
570d7624 | 1879 | UNGCPRO; |
265a9e55 | 1880 | if (NILP (tem)) |
24b1ddad KS |
1881 | xsignal2 (Qfile_already_exists, |
1882 | build_string ("File already exists"), absname); | |
3ed15d97 RS |
1883 | if (statptr) |
1884 | *statptr = statbuf; | |
1885 | } | |
1886 | else | |
1887 | { | |
1888 | if (statptr) | |
1889 | statptr->st_mode = 0; | |
570d7624 JB |
1890 | } |
1891 | return; | |
1892 | } | |
1893 | ||
795c20df | 1894 | DEFUN ("copy-file", Fcopy_file, Scopy_file, 2, 5, |
7c0f6118 | 1895 | "fCopy file: \nGCopy %s to file: \np\nP", |
8c1a1077 PJ |
1896 | doc: /* Copy FILE to NEWNAME. Both args must be strings. |
1897 | If NEWNAME names a directory, copy FILE there. | |
795c20df CY |
1898 | |
1899 | This function always sets the file modes of the output file to match | |
1900 | the input file. | |
1901 | ||
1902 | The optional third argument OK-IF-ALREADY-EXISTS specifies what to do | |
1903 | if file NEWNAME already exists. If OK-IF-ALREADY-EXISTS is nil, we | |
1904 | signal a `file-already-exists' error without overwriting. If | |
1905 | OK-IF-ALREADY-EXISTS is a number, we request confirmation from the user | |
1906 | about overwriting; this is what happens in interactive use with M-x. | |
1907 | Any other value for OK-IF-ALREADY-EXISTS means to overwrite the | |
1908 | existing file. | |
c50f15d0 | 1909 | |
7f08b80e | 1910 | Fourth arg KEEP-TIME non-nil means give the output file the same |
8c1a1077 | 1911 | last-modified time as the old one. (This works on only some systems.) |
c50f15d0 | 1912 | |
7fce7dfe EZ |
1913 | A prefix arg makes KEEP-TIME non-nil. |
1914 | ||
586702ce RS |
1915 | If PRESERVE-UID-GID is non-nil, we try to transfer the |
1916 | uid and gid of FILE to NEWNAME. */) | |
795c20df CY |
1917 | (file, newname, ok_if_already_exists, keep_time, preserve_uid_gid) |
1918 | Lisp_Object file, newname, ok_if_already_exists, keep_time; | |
586702ce | 1919 | Lisp_Object preserve_uid_gid; |
570d7624 JB |
1920 | { |
1921 | int ifd, ofd, n; | |
1922 | char buf[16 * 1024]; | |
3ed15d97 | 1923 | struct stat st, out_st; |
32f4334d | 1924 | Lisp_Object handler; |
b1d1b865 | 1925 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; |
aed13378 | 1926 | int count = SPECPDL_INDEX (); |
f73b0ada | 1927 | int input_file_statable_p; |
b1d1b865 | 1928 | Lisp_Object encoded_file, encoded_newname; |
570d7624 | 1929 | |
b1d1b865 RS |
1930 | encoded_file = encoded_newname = Qnil; |
1931 | GCPRO4 (file, newname, encoded_file, encoded_newname); | |
b7826503 PJ |
1932 | CHECK_STRING (file); |
1933 | CHECK_STRING (newname); | |
b1d1b865 | 1934 | |
a9d14e54 | 1935 | if (!NILP (Ffile_directory_p (newname))) |
6b61353c | 1936 | newname = Fexpand_file_name (Ffile_name_nondirectory (file), newname); |
a9d14e54 GM |
1937 | else |
1938 | newname = Fexpand_file_name (newname, Qnil); | |
1939 | ||
3b7f6e60 | 1940 | file = Fexpand_file_name (file, Qnil); |
32f4334d | 1941 | |
0bf2eed2 | 1942 | /* If the input file name has special constructs in it, |
32f4334d | 1943 | call the corresponding file handler. */ |
3b7f6e60 | 1944 | handler = Ffind_file_name_handler (file, Qcopy_file); |
0bf2eed2 | 1945 | /* Likewise for output file name. */ |
51cf6d37 | 1946 | if (NILP (handler)) |
49307295 | 1947 | handler = Ffind_file_name_handler (newname, Qcopy_file); |
32f4334d | 1948 | if (!NILP (handler)) |
1f163f28 MA |
1949 | RETURN_UNGCPRO (call6 (handler, Qcopy_file, file, newname, |
1950 | ok_if_already_exists, keep_time, preserve_uid_gid)); | |
32f4334d | 1951 | |
b1d1b865 RS |
1952 | encoded_file = ENCODE_FILE (file); |
1953 | encoded_newname = ENCODE_FILE (newname); | |
1954 | ||
265a9e55 | 1955 | if (NILP (ok_if_already_exists) |
93c30b5f | 1956 | || INTEGERP (ok_if_already_exists)) |
2f868094 | 1957 | barf_or_query_if_file_exists (newname, "copy to it", |
b8b29dc9 | 1958 | INTEGERP (ok_if_already_exists), &out_st, 0); |
d5db4077 | 1959 | else if (stat (SDATA (encoded_newname), &out_st) < 0) |
3ed15d97 | 1960 | out_st.st_mode = 0; |
570d7624 | 1961 | |
e8691c59 | 1962 | #ifdef WINDOWSNT |
d5db4077 | 1963 | if (!CopyFile (SDATA (encoded_file), |
efdc16c9 | 1964 | SDATA (encoded_newname), |
e8691c59 GM |
1965 | FALSE)) |
1966 | report_file_error ("Copying file", Fcons (file, Fcons (newname, Qnil))); | |
8b53dc06 JR |
1967 | /* CopyFile retains the timestamp by default. */ |
1968 | else if (NILP (keep_time)) | |
e8691c59 GM |
1969 | { |
1970 | EMACS_TIME now; | |
ad497129 JR |
1971 | DWORD attributes; |
1972 | char * filename; | |
1973 | ||
e8691c59 | 1974 | EMACS_GET_TIME (now); |
d5db4077 | 1975 | filename = SDATA (encoded_newname); |
ad497129 JR |
1976 | |
1977 | /* Ensure file is writable while its modified time is set. */ | |
1978 | attributes = GetFileAttributes (filename); | |
02cca86b | 1979 | SetFileAttributes (filename, attributes & ~FILE_ATTRIBUTE_READONLY); |
ad497129 JR |
1980 | if (set_file_times (filename, now, now)) |
1981 | { | |
1982 | /* Restore original attributes. */ | |
1983 | SetFileAttributes (filename, attributes); | |
24b1ddad KS |
1984 | xsignal2 (Qfile_date_error, |
1985 | build_string ("Cannot set file date"), newname); | |
ad497129 JR |
1986 | } |
1987 | /* Restore original attributes. */ | |
1988 | SetFileAttributes (filename, attributes); | |
e8691c59 GM |
1989 | } |
1990 | #else /* not WINDOWSNT */ | |
13336908 | 1991 | immediate_quit = 1; |
d5db4077 | 1992 | ifd = emacs_open (SDATA (encoded_file), O_RDONLY, 0); |
13336908 RS |
1993 | immediate_quit = 0; |
1994 | ||
570d7624 | 1995 | if (ifd < 0) |
3b7f6e60 | 1996 | report_file_error ("Opening input file", Fcons (file, Qnil)); |
570d7624 | 1997 | |
b5148e85 RS |
1998 | record_unwind_protect (close_file_unwind, make_number (ifd)); |
1999 | ||
f73b0ada BF |
2000 | /* We can only copy regular files and symbolic links. Other files are not |
2001 | copyable by us. */ | |
2002 | input_file_statable_p = (fstat (ifd, &st) >= 0); | |
2003 | ||
b016179b | 2004 | #if !defined (MSDOS) || __DJGPP__ > 1 |
3ed15d97 RS |
2005 | if (out_st.st_mode != 0 |
2006 | && st.st_dev == out_st.st_dev && st.st_ino == out_st.st_ino) | |
2007 | { | |
2008 | errno = 0; | |
2009 | report_file_error ("Input and output files are the same", | |
3b7f6e60 | 2010 | Fcons (file, Fcons (newname, Qnil))); |
3ed15d97 RS |
2011 | } |
2012 | #endif | |
2013 | ||
f73b0ada BF |
2014 | #if defined (S_ISREG) && defined (S_ISLNK) |
2015 | if (input_file_statable_p) | |
2016 | { | |
2017 | if (!(S_ISREG (st.st_mode)) && !(S_ISLNK (st.st_mode))) | |
2018 | { | |
2019 | #if defined (EISDIR) | |
2020 | /* Get a better looking error message. */ | |
2021 | errno = EISDIR; | |
2022 | #endif /* EISDIR */ | |
3b7f6e60 | 2023 | report_file_error ("Non-regular file", Fcons (file, Qnil)); |
f73b0ada BF |
2024 | } |
2025 | } | |
2026 | #endif /* S_ISREG && S_ISLNK */ | |
2027 | ||
4c3c22f3 RS |
2028 | #ifdef MSDOS |
2029 | /* System's default file type was set to binary by _fmode in emacs.c. */ | |
c50f15d0 | 2030 | ofd = emacs_open (SDATA (encoded_newname), |
7fce7dfe | 2031 | O_WRONLY | O_TRUNC | O_CREAT |
795c20df | 2032 | | (NILP (ok_if_already_exists) ? O_EXCL : 0), |
c50f15d0 RS |
2033 | S_IREAD | S_IWRITE); |
2034 | #else /* not MSDOS */ | |
2035 | ofd = emacs_open (SDATA (encoded_newname), | |
2036 | O_WRONLY | O_TRUNC | O_CREAT | |
795c20df | 2037 | | (NILP (ok_if_already_exists) ? O_EXCL : 0), |
c50f15d0 | 2038 | 0666); |
4c3c22f3 | 2039 | #endif /* not MSDOS */ |
570d7624 | 2040 | if (ofd < 0) |
3ed15d97 | 2041 | report_file_error ("Opening output file", Fcons (newname, Qnil)); |
b5148e85 RS |
2042 | |
2043 | record_unwind_protect (close_file_unwind, make_number (ofd)); | |
570d7624 | 2044 | |
b5148e85 RS |
2045 | immediate_quit = 1; |
2046 | QUIT; | |
68c45bf0 PE |
2047 | while ((n = emacs_read (ifd, buf, sizeof buf)) > 0) |
2048 | if (emacs_write (ofd, buf, n) != n) | |
3ed15d97 | 2049 | report_file_error ("I/O error", Fcons (newname, Qnil)); |
b5148e85 | 2050 | immediate_quit = 0; |
570d7624 | 2051 | |
b016179b EZ |
2052 | #ifndef MSDOS |
2053 | /* Preserve the original file modes, and if requested, also its | |
2054 | owner and group. */ | |
586702ce RS |
2055 | if (input_file_statable_p) |
2056 | { | |
b016179b EZ |
2057 | if (! NILP (preserve_uid_gid)) |
2058 | fchown (ofd, st.st_uid, st.st_gid); | |
586702ce | 2059 | fchmod (ofd, st.st_mode & 07777); |
586702ce | 2060 | } |
b016179b | 2061 | #endif /* not MSDOS */ |
586702ce | 2062 | |
5acac34e | 2063 | /* Closing the output clobbers the file times on some systems. */ |
68c45bf0 | 2064 | if (emacs_close (ofd) < 0) |
5acac34e RS |
2065 | report_file_error ("I/O error", Fcons (newname, Qnil)); |
2066 | ||
f73b0ada | 2067 | if (input_file_statable_p) |
570d7624 | 2068 | { |
8ca6602c | 2069 | if (!NILP (keep_time)) |
570d7624 | 2070 | { |
de5bf5d3 JB |
2071 | EMACS_TIME atime, mtime; |
2072 | EMACS_SET_SECS_USECS (atime, st.st_atime, 0); | |
2073 | EMACS_SET_SECS_USECS (mtime, st.st_mtime, 0); | |
d5db4077 | 2074 | if (set_file_times (SDATA (encoded_newname), |
b1d1b865 | 2075 | atime, mtime)) |
24b1ddad KS |
2076 | xsignal2 (Qfile_date_error, |
2077 | build_string ("Cannot set file date"), newname); | |
570d7624 | 2078 | } |
570d7624 JB |
2079 | } |
2080 | ||
68c45bf0 | 2081 | emacs_close (ifd); |
b016179b EZ |
2082 | |
2083 | #if defined (__DJGPP__) && __DJGPP__ > 1 | |
2084 | if (input_file_statable_p) | |
2085 | { | |
2086 | /* In DJGPP v2.0 and later, fstat usually returns true file mode bits, | |
2087 | and if it can't, it tells so. Otherwise, under MSDOS we usually | |
2088 | get only the READ bit, which will make the copied file read-only, | |
2089 | so it's better not to chmod at all. */ | |
2090 | if ((_djstat_flags & _STFAIL_WRITEBIT) == 0) | |
2091 | chmod (SDATA (encoded_newname), st.st_mode & 07777); | |
2092 | } | |
2093 | #endif /* DJGPP version 2 or newer */ | |
2094 | #endif /* not WINDOWSNT */ | |
5acac34e | 2095 | |
b5148e85 RS |
2096 | /* Discard the unwind protects. */ |
2097 | specpdl_ptr = specpdl + count; | |
2098 | ||
570d7624 JB |
2099 | UNGCPRO; |
2100 | return Qnil; | |
2101 | } | |
385b6cc7 | 2102 | \f |
9bbe01fb | 2103 | DEFUN ("make-directory-internal", Fmake_directory_internal, |
353cfc19 | 2104 | Smake_directory_internal, 1, 1, 0, |
8c1a1077 PJ |
2105 | doc: /* Create a new directory named DIRECTORY. */) |
2106 | (directory) | |
3b7f6e60 | 2107 | Lisp_Object directory; |
570d7624 | 2108 | { |
19290c65 | 2109 | const unsigned char *dir; |
32f4334d | 2110 | Lisp_Object handler; |
b1d1b865 | 2111 | Lisp_Object encoded_dir; |
570d7624 | 2112 | |
b7826503 | 2113 | CHECK_STRING (directory); |
3b7f6e60 | 2114 | directory = Fexpand_file_name (directory, Qnil); |
32f4334d | 2115 | |
3b7f6e60 | 2116 | handler = Ffind_file_name_handler (directory, Qmake_directory_internal); |
32f4334d | 2117 | if (!NILP (handler)) |
3b7f6e60 | 2118 | return call2 (handler, Qmake_directory_internal, directory); |
9bbe01fb | 2119 | |
b1d1b865 RS |
2120 | encoded_dir = ENCODE_FILE (directory); |
2121 | ||
d5db4077 | 2122 | dir = SDATA (encoded_dir); |
570d7624 | 2123 | |
5e570b75 RS |
2124 | #ifdef WINDOWSNT |
2125 | if (mkdir (dir) != 0) | |
2126 | #else | |
570d7624 | 2127 | if (mkdir (dir, 0777) != 0) |
5e570b75 | 2128 | #endif |
a9f2aeae | 2129 | report_file_error ("Creating directory", list1 (directory)); |
570d7624 | 2130 | |
32f4334d | 2131 | return Qnil; |
570d7624 JB |
2132 | } |
2133 | ||
aa734e17 | 2134 | DEFUN ("delete-directory", Fdelete_directory, Sdelete_directory, 1, 1, "FDelete directory: ", |
efdc16c9 | 2135 | doc: /* Delete the directory named DIRECTORY. Does not follow symlinks. */) |
8c1a1077 | 2136 | (directory) |
3b7f6e60 | 2137 | Lisp_Object directory; |
570d7624 | 2138 | { |
19290c65 | 2139 | const unsigned char *dir; |
32f4334d | 2140 | Lisp_Object handler; |
b1d1b865 | 2141 | Lisp_Object encoded_dir; |
570d7624 | 2142 | |
b7826503 | 2143 | CHECK_STRING (directory); |
3b7f6e60 | 2144 | directory = Fdirectory_file_name (Fexpand_file_name (directory, Qnil)); |
570d7624 | 2145 | |
3b7f6e60 | 2146 | handler = Ffind_file_name_handler (directory, Qdelete_directory); |
32f4334d | 2147 | if (!NILP (handler)) |
3b7f6e60 | 2148 | return call2 (handler, Qdelete_directory, directory); |
32f4334d | 2149 | |
6cf29fe8 JR |
2150 | if (delete_by_moving_to_trash) |
2151 | return call1 (Qmove_file_to_trash, directory); | |
2152 | ||
b1d1b865 RS |
2153 | encoded_dir = ENCODE_FILE (directory); |
2154 | ||
d5db4077 | 2155 | dir = SDATA (encoded_dir); |
b1d1b865 | 2156 | |
570d7624 | 2157 | if (rmdir (dir) != 0) |
a9f2aeae | 2158 | report_file_error ("Removing directory", list1 (directory)); |
570d7624 JB |
2159 | |
2160 | return Qnil; | |
2161 | } | |
2162 | ||
2163 | DEFUN ("delete-file", Fdelete_file, Sdelete_file, 1, 1, "fDelete file: ", | |
efdc16c9 | 2164 | doc: /* Delete file named FILENAME. If it is a symlink, remove the symlink. |
8c1a1077 PJ |
2165 | If file has multiple names, it continues to exist with the other names. */) |
2166 | (filename) | |
570d7624 JB |
2167 | Lisp_Object filename; |
2168 | { | |
32f4334d | 2169 | Lisp_Object handler; |
b1d1b865 | 2170 | Lisp_Object encoded_file; |
efdc16c9 | 2171 | struct gcpro gcpro1; |
b1d1b865 | 2172 | |
efdc16c9 | 2173 | GCPRO1 (filename); |
b4bd27c5 RS |
2174 | if (!NILP (Ffile_directory_p (filename)) |
2175 | && NILP (Ffile_symlink_p (filename))) | |
24b1ddad KS |
2176 | xsignal2 (Qfile_error, |
2177 | build_string ("Removing old name: is a directory"), | |
2178 | filename); | |
efdc16c9 | 2179 | UNGCPRO; |
570d7624 | 2180 | filename = Fexpand_file_name (filename, Qnil); |
32f4334d | 2181 | |
49307295 | 2182 | handler = Ffind_file_name_handler (filename, Qdelete_file); |
32f4334d | 2183 | if (!NILP (handler)) |
8a9b0da9 | 2184 | return call2 (handler, Qdelete_file, filename); |
32f4334d | 2185 | |
6cf29fe8 JR |
2186 | if (delete_by_moving_to_trash) |
2187 | return call1 (Qmove_file_to_trash, filename); | |
2188 | ||
b1d1b865 RS |
2189 | encoded_file = ENCODE_FILE (filename); |
2190 | ||
d5db4077 | 2191 | if (0 > unlink (SDATA (encoded_file))) |
a9f2aeae | 2192 | report_file_error ("Removing old name", list1 (filename)); |
8a9b0da9 | 2193 | return Qnil; |
570d7624 JB |
2194 | } |
2195 | ||
385b6cc7 RS |
2196 | static Lisp_Object |
2197 | internal_delete_file_1 (ignore) | |
2198 | Lisp_Object ignore; | |
2199 | { | |
2200 | return Qt; | |
2201 | } | |
2202 | ||
2203 | /* Delete file FILENAME, returning 1 if successful and 0 if failed. */ | |
2204 | ||
2205 | int | |
2206 | internal_delete_file (filename) | |
2207 | Lisp_Object filename; | |
2208 | { | |
a3911e8c KR |
2209 | Lisp_Object tem; |
2210 | tem = internal_condition_case_1 (Fdelete_file, filename, | |
2211 | Qt, internal_delete_file_1); | |
2212 | return NILP (tem); | |
385b6cc7 RS |
2213 | } |
2214 | \f | |
570d7624 | 2215 | DEFUN ("rename-file", Frename_file, Srename_file, 2, 3, |
7c0f6118 | 2216 | "fRename file: \nGRename %s to file: \np", |
a4e03fe5 | 2217 | doc: /* Rename FILE as NEWNAME. Both args must be strings. |
8c1a1077 PJ |
2218 | If file has names other than FILE, it continues to have those names. |
2219 | Signals a `file-already-exists' error if a file NEWNAME already exists | |
2220 | unless optional third argument OK-IF-ALREADY-EXISTS is non-nil. | |
2221 | A number as third arg means request confirmation if NEWNAME already exists. | |
2222 | This is what happens in interactive use with M-x. */) | |
2223 | (file, newname, ok_if_already_exists) | |
3b7f6e60 | 2224 | Lisp_Object file, newname, ok_if_already_exists; |
570d7624 | 2225 | { |
32f4334d | 2226 | Lisp_Object handler; |
f72b5416 JD |
2227 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4, gcpro5; |
2228 | Lisp_Object encoded_file, encoded_newname, symlink_target; | |
570d7624 | 2229 | |
f72b5416 JD |
2230 | symlink_target = encoded_file = encoded_newname = Qnil; |
2231 | GCPRO5 (file, newname, encoded_file, encoded_newname, symlink_target); | |
b7826503 PJ |
2232 | CHECK_STRING (file); |
2233 | CHECK_STRING (newname); | |
3b7f6e60 | 2234 | file = Fexpand_file_name (file, Qnil); |
1ffc5c90 | 2235 | |
f83caf70 EZ |
2236 | if ((!NILP (Ffile_directory_p (newname))) |
2237 | #ifdef DOS_NT | |
2238 | /* If the file names are identical but for the case, | |
2239 | don't attempt to move directory to itself. */ | |
2240 | && (NILP (Fstring_equal (Fdowncase (file), Fdowncase (newname)))) | |
2241 | #endif | |
2242 | ) | |
1ffc5c90 RS |
2243 | newname = Fexpand_file_name (Ffile_name_nondirectory (file), newname); |
2244 | else | |
2245 | newname = Fexpand_file_name (newname, Qnil); | |
32f4334d RS |
2246 | |
2247 | /* If the file name has special constructs in it, | |
2248 | call the corresponding file handler. */ | |
3b7f6e60 | 2249 | handler = Ffind_file_name_handler (file, Qrename_file); |
51cf6d37 | 2250 | if (NILP (handler)) |
49307295 | 2251 | handler = Ffind_file_name_handler (newname, Qrename_file); |
32f4334d | 2252 | if (!NILP (handler)) |
36712b0a | 2253 | RETURN_UNGCPRO (call4 (handler, Qrename_file, |
3b7f6e60 | 2254 | file, newname, ok_if_already_exists)); |
32f4334d | 2255 | |
b1d1b865 RS |
2256 | encoded_file = ENCODE_FILE (file); |
2257 | encoded_newname = ENCODE_FILE (newname); | |
2258 | ||
bc77278f EZ |
2259 | #ifdef DOS_NT |
2260 | /* If the file names are identical but for the case, don't ask for | |
2261 | confirmation: they simply want to change the letter-case of the | |
2262 | file name. */ | |
2263 | if (NILP (Fstring_equal (Fdowncase (file), Fdowncase (newname)))) | |
2264 | #endif | |
265a9e55 | 2265 | if (NILP (ok_if_already_exists) |
93c30b5f | 2266 | || INTEGERP (ok_if_already_exists)) |
2f868094 | 2267 | barf_or_query_if_file_exists (newname, "rename to it", |
b8b29dc9 | 2268 | INTEGERP (ok_if_already_exists), 0, 0); |
d5db4077 | 2269 | if (0 > rename (SDATA (encoded_file), SDATA (encoded_newname))) |
570d7624 JB |
2270 | { |
2271 | if (errno == EXDEV) | |
2272 | { | |
6bddfc97 | 2273 | int count; |
440c7d00 | 2274 | #ifdef S_IFLNK |
f72b5416 | 2275 | symlink_target = Ffile_symlink_p (file); |
440c7d00 JD |
2276 | if (! NILP (symlink_target)) |
2277 | Fmake_symbolic_link (symlink_target, newname, | |
f59abab9 | 2278 | NILP (ok_if_already_exists) ? Qnil : Qt); |
440c7d00 JD |
2279 | else |
2280 | #endif | |
586702ce RS |
2281 | Fcopy_file (file, newname, |
2282 | /* We have already prompted if it was an integer, | |
2283 | so don't have copy-file prompt again. */ | |
2284 | NILP (ok_if_already_exists) ? Qnil : Qt, | |
795c20df | 2285 | Qt, Qt); |
d550c425 | 2286 | |
6bddfc97 | 2287 | count = SPECPDL_INDEX (); |
d2b66acf | 2288 | specbind (Qdelete_by_moving_to_trash, Qnil); |
3b7f6e60 | 2289 | Fdelete_file (file); |
6bddfc97 | 2290 | unbind_to (count, Qnil); |
570d7624 JB |
2291 | } |
2292 | else | |
a9f2aeae | 2293 | report_file_error ("Renaming", list2 (file, newname)); |
570d7624 JB |
2294 | } |
2295 | UNGCPRO; | |
2296 | return Qnil; | |
2297 | } | |
2298 | ||
2299 | DEFUN ("add-name-to-file", Fadd_name_to_file, Sadd_name_to_file, 2, 3, | |
7c0f6118 | 2300 | "fAdd name to file: \nGName to add to %s: \np", |
a4e03fe5 | 2301 | doc: /* Give FILE additional name NEWNAME. Both args must be strings. |
8c1a1077 PJ |
2302 | Signals a `file-already-exists' error if a file NEWNAME already exists |
2303 | unless optional third argument OK-IF-ALREADY-EXISTS is non-nil. | |
2304 | A number as third arg means request confirmation if NEWNAME already exists. | |
2305 | This is what happens in interactive use with M-x. */) | |
2306 | (file, newname, ok_if_already_exists) | |
3b7f6e60 | 2307 | Lisp_Object file, newname, ok_if_already_exists; |
570d7624 | 2308 | { |
32f4334d | 2309 | Lisp_Object handler; |
b1d1b865 RS |
2310 | Lisp_Object encoded_file, encoded_newname; |
2311 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; | |
570d7624 | 2312 | |
b1d1b865 RS |
2313 | GCPRO4 (file, newname, encoded_file, encoded_newname); |
2314 | encoded_file = encoded_newname = Qnil; | |
b7826503 PJ |
2315 | CHECK_STRING (file); |
2316 | CHECK_STRING (newname); | |
3b7f6e60 | 2317 | file = Fexpand_file_name (file, Qnil); |
1ffc5c90 RS |
2318 | |
2319 | if (!NILP (Ffile_directory_p (newname))) | |
2320 | newname = Fexpand_file_name (Ffile_name_nondirectory (file), newname); | |
2321 | else | |
2322 | newname = Fexpand_file_name (newname, Qnil); | |
32f4334d RS |
2323 | |
2324 | /* If the file name has special constructs in it, | |
2325 | call the corresponding file handler. */ | |
3b7f6e60 | 2326 | handler = Ffind_file_name_handler (file, Qadd_name_to_file); |
32f4334d | 2327 | if (!NILP (handler)) |
3b7f6e60 | 2328 | RETURN_UNGCPRO (call4 (handler, Qadd_name_to_file, file, |
36712b0a | 2329 | newname, ok_if_already_exists)); |
32f4334d | 2330 | |
adc6741c RS |
2331 | /* If the new name has special constructs in it, |
2332 | call the corresponding file handler. */ | |
2333 | handler = Ffind_file_name_handler (newname, Qadd_name_to_file); | |
2334 | if (!NILP (handler)) | |
3b7f6e60 | 2335 | RETURN_UNGCPRO (call4 (handler, Qadd_name_to_file, file, |
adc6741c RS |
2336 | newname, ok_if_already_exists)); |
2337 | ||
b1d1b865 RS |
2338 | encoded_file = ENCODE_FILE (file); |
2339 | encoded_newname = ENCODE_FILE (newname); | |
2340 | ||
265a9e55 | 2341 | if (NILP (ok_if_already_exists) |
93c30b5f | 2342 | || INTEGERP (ok_if_already_exists)) |
2f868094 | 2343 | barf_or_query_if_file_exists (newname, "make it a new name", |
b8b29dc9 | 2344 | INTEGERP (ok_if_already_exists), 0, 0); |
5e570b75 | 2345 | |
d5db4077 KR |
2346 | unlink (SDATA (newname)); |
2347 | if (0 > link (SDATA (encoded_file), SDATA (encoded_newname))) | |
a9f2aeae | 2348 | report_file_error ("Adding new name", list2 (file, newname)); |
570d7624 JB |
2349 | |
2350 | UNGCPRO; | |
2351 | return Qnil; | |
2352 | } | |
2353 | ||
570d7624 | 2354 | DEFUN ("make-symbolic-link", Fmake_symbolic_link, Smake_symbolic_link, 2, 3, |
7c0f6118 | 2355 | "FMake symbolic link to file: \nGMake symbolic link to file %s: \np", |
68780e2a RS |
2356 | doc: /* Make a symbolic link to FILENAME, named LINKNAME. |
2357 | Both args must be strings. | |
8c1a1077 PJ |
2358 | Signals a `file-already-exists' error if a file LINKNAME already exists |
2359 | unless optional third argument OK-IF-ALREADY-EXISTS is non-nil. | |
2360 | A number as third arg means request confirmation if LINKNAME already exists. | |
2361 | This happens for interactive use with M-x. */) | |
2362 | (filename, linkname, ok_if_already_exists) | |
e5d77022 | 2363 | Lisp_Object filename, linkname, ok_if_already_exists; |
570d7624 | 2364 | { |
32f4334d | 2365 | Lisp_Object handler; |
b1d1b865 RS |
2366 | Lisp_Object encoded_filename, encoded_linkname; |
2367 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; | |
570d7624 | 2368 | |
b1d1b865 RS |
2369 | GCPRO4 (filename, linkname, encoded_filename, encoded_linkname); |
2370 | encoded_filename = encoded_linkname = Qnil; | |
b7826503 PJ |
2371 | CHECK_STRING (filename); |
2372 | CHECK_STRING (linkname); | |
d9bc1c99 RS |
2373 | /* If the link target has a ~, we must expand it to get |
2374 | a truly valid file name. Otherwise, do not expand; | |
2375 | we want to permit links to relative file names. */ | |
d5db4077 | 2376 | if (SREF (filename, 0) == '~') |
d9bc1c99 | 2377 | filename = Fexpand_file_name (filename, Qnil); |
1ffc5c90 RS |
2378 | |
2379 | if (!NILP (Ffile_directory_p (linkname))) | |
dac24db4 | 2380 | linkname = Fexpand_file_name (Ffile_name_nondirectory (filename), linkname); |
1ffc5c90 RS |
2381 | else |
2382 | linkname = Fexpand_file_name (linkname, Qnil); | |
32f4334d RS |
2383 | |
2384 | /* If the file name has special constructs in it, | |
2385 | call the corresponding file handler. */ | |
49307295 | 2386 | handler = Ffind_file_name_handler (filename, Qmake_symbolic_link); |
32f4334d | 2387 | if (!NILP (handler)) |
36712b0a KH |
2388 | RETURN_UNGCPRO (call4 (handler, Qmake_symbolic_link, filename, |
2389 | linkname, ok_if_already_exists)); | |
32f4334d | 2390 | |
adc6741c RS |
2391 | /* If the new link name has special constructs in it, |
2392 | call the corresponding file handler. */ | |
2393 | handler = Ffind_file_name_handler (linkname, Qmake_symbolic_link); | |
2394 | if (!NILP (handler)) | |
2395 | RETURN_UNGCPRO (call4 (handler, Qmake_symbolic_link, filename, | |
2396 | linkname, ok_if_already_exists)); | |
2397 | ||
e89b536d | 2398 | #ifdef S_IFLNK |
b1d1b865 RS |
2399 | encoded_filename = ENCODE_FILE (filename); |
2400 | encoded_linkname = ENCODE_FILE (linkname); | |
2401 | ||
265a9e55 | 2402 | if (NILP (ok_if_already_exists) |
93c30b5f | 2403 | || INTEGERP (ok_if_already_exists)) |
2f868094 | 2404 | barf_or_query_if_file_exists (linkname, "make it a link", |
b8b29dc9 | 2405 | INTEGERP (ok_if_already_exists), 0, 0); |
d5db4077 KR |
2406 | if (0 > symlink (SDATA (encoded_filename), |
2407 | SDATA (encoded_linkname))) | |
570d7624 JB |
2408 | { |
2409 | /* If we didn't complain already, silently delete existing file. */ | |
2410 | if (errno == EEXIST) | |
2411 | { | |
d5db4077 KR |
2412 | unlink (SDATA (encoded_linkname)); |
2413 | if (0 <= symlink (SDATA (encoded_filename), | |
2414 | SDATA (encoded_linkname))) | |
1a04498e KH |
2415 | { |
2416 | UNGCPRO; | |
2417 | return Qnil; | |
2418 | } | |
570d7624 JB |
2419 | } |
2420 | ||
a9f2aeae | 2421 | report_file_error ("Making symbolic link", list2 (filename, linkname)); |
570d7624 JB |
2422 | } |
2423 | UNGCPRO; | |
2424 | return Qnil; | |
e89b536d MA |
2425 | |
2426 | #else | |
2427 | UNGCPRO; | |
2428 | xsignal1 (Qfile_error, build_string ("Symbolic links are not supported")); | |
2429 | ||
570d7624 | 2430 | #endif /* S_IFLNK */ |
e89b536d | 2431 | } |
570d7624 | 2432 | |
570d7624 JB |
2433 | \f |
2434 | DEFUN ("file-name-absolute-p", Ffile_name_absolute_p, Sfile_name_absolute_p, | |
2435 | 1, 1, 0, | |
8c1a1077 PJ |
2436 | doc: /* Return t if file FILENAME specifies an absolute file name. |
2437 | On Unix, this is a name starting with a `/' or a `~'. */) | |
570d7624 JB |
2438 | (filename) |
2439 | Lisp_Object filename; | |
2440 | { | |
b7826503 | 2441 | CHECK_STRING (filename); |
c70a4df6 | 2442 | return file_name_absolute_p (SDATA (filename)) ? Qt : Qnil; |
570d7624 | 2443 | } |
3beeedfe RS |
2444 | \f |
2445 | /* Return nonzero if file FILENAME exists and can be executed. */ | |
2446 | ||
2447 | static int | |
2448 | check_executable (filename) | |
2449 | char *filename; | |
2450 | { | |
3be3c08e RS |
2451 | #ifdef DOS_NT |
2452 | int len = strlen (filename); | |
2453 | char *suffix; | |
2454 | struct stat st; | |
2455 | if (stat (filename, &st) < 0) | |
2456 | return 0; | |
34ead71a | 2457 | #if defined (WINDOWSNT) || (defined (MSDOS) && __DJGPP__ > 1) |
199607e4 RS |
2458 | return ((st.st_mode & S_IEXEC) != 0); |
2459 | #else | |
3be3c08e RS |
2460 | return (S_ISREG (st.st_mode) |
2461 | && len >= 5 | |
05131107 JR |
2462 | && (xstrcasecmp ((suffix = filename + len-4), ".com") == 0 |
2463 | || xstrcasecmp (suffix, ".exe") == 0 | |
2464 | || xstrcasecmp (suffix, ".bat") == 0) | |
2dc3be7e | 2465 | || (st.st_mode & S_IFMT) == S_IFDIR); |
199607e4 | 2466 | #endif /* not WINDOWSNT */ |
3be3c08e | 2467 | #else /* not DOS_NT */ |
de0be7dd RS |
2468 | #ifdef HAVE_EUIDACCESS |
2469 | return (euidaccess (filename, 1) >= 0); | |
3beeedfe RS |
2470 | #else |
2471 | /* Access isn't quite right because it uses the real uid | |
2472 | and we really want to test with the effective uid. | |
2473 | But Unix doesn't give us a right way to do it. */ | |
2474 | return (access (filename, 1) >= 0); | |
2475 | #endif | |
3be3c08e | 2476 | #endif /* not DOS_NT */ |
3beeedfe RS |
2477 | } |
2478 | ||
2479 | /* Return nonzero if file FILENAME exists and can be written. */ | |
2480 | ||
2481 | static int | |
2482 | check_writable (filename) | |
2483 | char *filename; | |
2484 | { | |
3be3c08e RS |
2485 | #ifdef MSDOS |
2486 | struct stat st; | |
2487 | if (stat (filename, &st) < 0) | |
2488 | return 0; | |
2489 | return (st.st_mode & S_IWRITE || (st.st_mode & S_IFMT) == S_IFDIR); | |
2490 | #else /* not MSDOS */ | |
41f3fb38 KH |
2491 | #ifdef HAVE_EUIDACCESS |
2492 | return (euidaccess (filename, 2) >= 0); | |
3beeedfe RS |
2493 | #else |
2494 | /* Access isn't quite right because it uses the real uid | |
2495 | and we really want to test with the effective uid. | |
2496 | But Unix doesn't give us a right way to do it. | |
2497 | Opening with O_WRONLY could work for an ordinary file, | |
2498 | but would lose for directories. */ | |
2499 | return (access (filename, 2) >= 0); | |
2500 | #endif | |
3be3c08e | 2501 | #endif /* not MSDOS */ |
3beeedfe | 2502 | } |
570d7624 JB |
2503 | |
2504 | DEFUN ("file-exists-p", Ffile_exists_p, Sfile_exists_p, 1, 1, 0, | |
68780e2a RS |
2505 | doc: /* Return t if file FILENAME exists (whether or not you can read it.) |
2506 | See also `file-readable-p' and `file-attributes'. | |
2507 | This returns nil for a symlink to a nonexistent file. | |
2508 | Use `file-symlink-p' to test for such links. */) | |
8c1a1077 | 2509 | (filename) |
570d7624 JB |
2510 | Lisp_Object filename; |
2511 | { | |
199607e4 | 2512 | Lisp_Object absname; |
32f4334d | 2513 | Lisp_Object handler; |
4018b5ef | 2514 | struct stat statbuf; |
570d7624 | 2515 | |
b7826503 | 2516 | CHECK_STRING (filename); |
199607e4 | 2517 | absname = Fexpand_file_name (filename, Qnil); |
32f4334d RS |
2518 | |
2519 | /* If the file name has special constructs in it, | |
2520 | call the corresponding file handler. */ | |
199607e4 | 2521 | handler = Ffind_file_name_handler (absname, Qfile_exists_p); |
32f4334d | 2522 | if (!NILP (handler)) |
199607e4 | 2523 | return call2 (handler, Qfile_exists_p, absname); |
32f4334d | 2524 | |
b1d1b865 RS |
2525 | absname = ENCODE_FILE (absname); |
2526 | ||
d5db4077 | 2527 | return (stat (SDATA (absname), &statbuf) >= 0) ? Qt : Qnil; |
570d7624 JB |
2528 | } |
2529 | ||
2530 | DEFUN ("file-executable-p", Ffile_executable_p, Sfile_executable_p, 1, 1, 0, | |
8c1a1077 PJ |
2531 | doc: /* Return t if FILENAME can be executed by you. |
2532 | For a directory, this means you can access files in that directory. */) | |
2533 | (filename) | |
2534 | Lisp_Object filename; | |
570d7624 | 2535 | { |
199607e4 | 2536 | Lisp_Object absname; |
32f4334d | 2537 | Lisp_Object handler; |
570d7624 | 2538 | |
b7826503 | 2539 | CHECK_STRING (filename); |
199607e4 | 2540 | absname = Fexpand_file_name (filename, Qnil); |
32f4334d RS |
2541 | |
2542 | /* If the file name has special constructs in it, | |
2543 | call the corresponding file handler. */ | |
199607e4 | 2544 | handler = Ffind_file_name_handler (absname, Qfile_executable_p); |
32f4334d | 2545 | if (!NILP (handler)) |
199607e4 | 2546 | return call2 (handler, Qfile_executable_p, absname); |
32f4334d | 2547 | |
b1d1b865 RS |
2548 | absname = ENCODE_FILE (absname); |
2549 | ||
d5db4077 | 2550 | return (check_executable (SDATA (absname)) ? Qt : Qnil); |
570d7624 JB |
2551 | } |
2552 | ||
2553 | DEFUN ("file-readable-p", Ffile_readable_p, Sfile_readable_p, 1, 1, 0, | |
8c1a1077 PJ |
2554 | doc: /* Return t if file FILENAME exists and you can read it. |
2555 | See also `file-exists-p' and `file-attributes'. */) | |
2556 | (filename) | |
570d7624 JB |
2557 | Lisp_Object filename; |
2558 | { | |
199607e4 | 2559 | Lisp_Object absname; |
32f4334d | 2560 | Lisp_Object handler; |
4018b5ef | 2561 | int desc; |
bb369dc6 RS |
2562 | int flags; |
2563 | struct stat statbuf; | |
570d7624 | 2564 | |
b7826503 | 2565 | CHECK_STRING (filename); |
199607e4 | 2566 | absname = Fexpand_file_name (filename, Qnil); |
32f4334d RS |
2567 | |
2568 | /* If the file name has special constructs in it, | |
2569 | call the corresponding file handler. */ | |
199607e4 | 2570 | handler = Ffind_file_name_handler (absname, Qfile_readable_p); |
32f4334d | 2571 | if (!NILP (handler)) |
199607e4 | 2572 | return call2 (handler, Qfile_readable_p, absname); |
32f4334d | 2573 | |
b1d1b865 RS |
2574 | absname = ENCODE_FILE (absname); |
2575 | ||
fb4c6c96 AC |
2576 | #if defined(DOS_NT) || defined(macintosh) |
2577 | /* Under MS-DOS, Windows, and Macintosh, open does not work for | |
2578 | directories. */ | |
d5db4077 | 2579 | if (access (SDATA (absname), 0) == 0) |
a8a7d065 RS |
2580 | return Qt; |
2581 | return Qnil; | |
fb4c6c96 | 2582 | #else /* not DOS_NT and not macintosh */ |
bb369dc6 RS |
2583 | flags = O_RDONLY; |
2584 | #if defined (S_ISFIFO) && defined (O_NONBLOCK) | |
2585 | /* Opening a fifo without O_NONBLOCK can wait. | |
2586 | We don't want to wait. But we don't want to mess wth O_NONBLOCK | |
2587 | except in the case of a fifo, on a system which handles it. */ | |
d5db4077 | 2588 | desc = stat (SDATA (absname), &statbuf); |
bb369dc6 RS |
2589 | if (desc < 0) |
2590 | return Qnil; | |
2591 | if (S_ISFIFO (statbuf.st_mode)) | |
2592 | flags |= O_NONBLOCK; | |
2593 | #endif | |
d5db4077 | 2594 | desc = emacs_open (SDATA (absname), flags, 0); |
4018b5ef RS |
2595 | if (desc < 0) |
2596 | return Qnil; | |
68c45bf0 | 2597 | emacs_close (desc); |
4018b5ef | 2598 | return Qt; |
fb4c6c96 | 2599 | #endif /* not DOS_NT and not macintosh */ |
570d7624 JB |
2600 | } |
2601 | ||
f793dc6c RS |
2602 | /* Having this before file-symlink-p mysteriously caused it to be forgotten |
2603 | on the RT/PC. */ | |
2604 | DEFUN ("file-writable-p", Ffile_writable_p, Sfile_writable_p, 1, 1, 0, | |
8c1a1077 PJ |
2605 | doc: /* Return t if file FILENAME can be written or created by you. */) |
2606 | (filename) | |
f793dc6c RS |
2607 | Lisp_Object filename; |
2608 | { | |
b1d1b865 | 2609 | Lisp_Object absname, dir, encoded; |
f793dc6c RS |
2610 | Lisp_Object handler; |
2611 | struct stat statbuf; | |
2612 | ||
b7826503 | 2613 | CHECK_STRING (filename); |
199607e4 | 2614 | absname = Fexpand_file_name (filename, Qnil); |
f793dc6c RS |
2615 | |
2616 | /* If the file name has special constructs in it, | |
2617 | call the corresponding file handler. */ | |
199607e4 | 2618 | handler = Ffind_file_name_handler (absname, Qfile_writable_p); |
f793dc6c | 2619 | if (!NILP (handler)) |
199607e4 | 2620 | return call2 (handler, Qfile_writable_p, absname); |
f793dc6c | 2621 | |
b1d1b865 | 2622 | encoded = ENCODE_FILE (absname); |
d5db4077 KR |
2623 | if (stat (SDATA (encoded), &statbuf) >= 0) |
2624 | return (check_writable (SDATA (encoded)) | |
f793dc6c | 2625 | ? Qt : Qnil); |
b1d1b865 | 2626 | |
199607e4 | 2627 | dir = Ffile_name_directory (absname); |
f793dc6c RS |
2628 | #ifdef MSDOS |
2629 | if (!NILP (dir)) | |
2630 | dir = Fdirectory_file_name (dir); | |
2631 | #endif /* MSDOS */ | |
b1d1b865 RS |
2632 | |
2633 | dir = ENCODE_FILE (dir); | |
e3e8a75a GM |
2634 | #ifdef WINDOWSNT |
2635 | /* The read-only attribute of the parent directory doesn't affect | |
2636 | whether a file or directory can be created within it. Some day we | |
2637 | should check ACLs though, which do affect this. */ | |
d5db4077 | 2638 | if (stat (SDATA (dir), &statbuf) < 0) |
e3e8a75a GM |
2639 | return Qnil; |
2640 | return (statbuf.st_mode & S_IFMT) == S_IFDIR ? Qt : Qnil; | |
2641 | #else | |
d5db4077 | 2642 | return (check_writable (!NILP (dir) ? (char *) SDATA (dir) : "") |
f793dc6c | 2643 | ? Qt : Qnil); |
e3e8a75a | 2644 | #endif |
f793dc6c RS |
2645 | } |
2646 | \f | |
1f8653eb | 2647 | DEFUN ("access-file", Faccess_file, Saccess_file, 2, 2, 0, |
8c1a1077 PJ |
2648 | doc: /* Access file FILENAME, and get an error if that does not work. |
2649 | The second argument STRING is used in the error message. | |
a4e03fe5 | 2650 | If there is no error, returns nil. */) |
8c1a1077 | 2651 | (filename, string) |
1f8653eb RS |
2652 | Lisp_Object filename, string; |
2653 | { | |
49475635 | 2654 | Lisp_Object handler, encoded_filename, absname; |
1f8653eb RS |
2655 | int fd; |
2656 | ||
b7826503 | 2657 | CHECK_STRING (filename); |
49475635 EZ |
2658 | absname = Fexpand_file_name (filename, Qnil); |
2659 | ||
b7826503 | 2660 | CHECK_STRING (string); |
1f8653eb RS |
2661 | |
2662 | /* If the file name has special constructs in it, | |
2663 | call the corresponding file handler. */ | |
49475635 | 2664 | handler = Ffind_file_name_handler (absname, Qaccess_file); |
1f8653eb | 2665 | if (!NILP (handler)) |
49475635 | 2666 | return call3 (handler, Qaccess_file, absname, string); |
1f8653eb | 2667 | |
49475635 | 2668 | encoded_filename = ENCODE_FILE (absname); |
b1d1b865 | 2669 | |
d5db4077 | 2670 | fd = emacs_open (SDATA (encoded_filename), O_RDONLY, 0); |
1f8653eb | 2671 | if (fd < 0) |
d5db4077 | 2672 | report_file_error (SDATA (string), Fcons (filename, Qnil)); |
68c45bf0 | 2673 | emacs_close (fd); |
1f8653eb RS |
2674 | |
2675 | return Qnil; | |
2676 | } | |
2677 | \f | |
570d7624 | 2678 | DEFUN ("file-symlink-p", Ffile_symlink_p, Sfile_symlink_p, 1, 1, 0, |
8c1a1077 | 2679 | doc: /* Return non-nil if file FILENAME is the name of a symbolic link. |
1c353c74 | 2680 | The value is the link target, as a string. |
68780e2a RS |
2681 | Otherwise it returns nil. |
2682 | ||
2683 | This function returns t when given the name of a symlink that | |
2684 | points to a nonexistent file. */) | |
8c1a1077 | 2685 | (filename) |
570d7624 JB |
2686 | Lisp_Object filename; |
2687 | { | |
32f4334d | 2688 | Lisp_Object handler; |
570d7624 | 2689 | |
b7826503 | 2690 | CHECK_STRING (filename); |
570d7624 JB |
2691 | filename = Fexpand_file_name (filename, Qnil); |
2692 | ||
32f4334d RS |
2693 | /* If the file name has special constructs in it, |
2694 | call the corresponding file handler. */ | |
49307295 | 2695 | handler = Ffind_file_name_handler (filename, Qfile_symlink_p); |
32f4334d RS |
2696 | if (!NILP (handler)) |
2697 | return call2 (handler, Qfile_symlink_p, filename); | |
2698 | ||
5adcec23 JR |
2699 | #ifdef S_IFLNK |
2700 | { | |
2701 | char *buf; | |
2702 | int bufsize; | |
2703 | int valsize; | |
2704 | Lisp_Object val; | |
2705 | ||
b1d1b865 RS |
2706 | filename = ENCODE_FILE (filename); |
2707 | ||
81c3310d GM |
2708 | bufsize = 50; |
2709 | buf = NULL; | |
2710 | do | |
570d7624 | 2711 | { |
81c3310d GM |
2712 | bufsize *= 2; |
2713 | buf = (char *) xrealloc (buf, bufsize); | |
570d7624 | 2714 | bzero (buf, bufsize); |
efdc16c9 | 2715 | |
81c3310d | 2716 | errno = 0; |
d5db4077 | 2717 | valsize = readlink (SDATA (filename), buf, bufsize); |
bcdd93b3 GM |
2718 | if (valsize == -1) |
2719 | { | |
81c3310d GM |
2720 | #ifdef ERANGE |
2721 | /* HP-UX reports ERANGE if buffer is too small. */ | |
bcdd93b3 GM |
2722 | if (errno == ERANGE) |
2723 | valsize = bufsize; | |
2724 | else | |
81c3310d | 2725 | #endif |
bcdd93b3 GM |
2726 | { |
2727 | xfree (buf); | |
2728 | return Qnil; | |
2729 | } | |
81c3310d | 2730 | } |
570d7624 | 2731 | } |
81c3310d | 2732 | while (valsize >= bufsize); |
efdc16c9 | 2733 | |
570d7624 | 2734 | val = make_string (buf, valsize); |
69ac1891 GM |
2735 | if (buf[0] == '/' && index (buf, ':')) |
2736 | val = concat2 (build_string ("/:"), val); | |
9ac0d9e0 | 2737 | xfree (buf); |
cd913586 KH |
2738 | val = DECODE_FILE (val); |
2739 | return val; | |
5adcec23 | 2740 | } |
570d7624 JB |
2741 | #else /* not S_IFLNK */ |
2742 | return Qnil; | |
2743 | #endif /* not S_IFLNK */ | |
2744 | } | |
2745 | ||
570d7624 | 2746 | DEFUN ("file-directory-p", Ffile_directory_p, Sfile_directory_p, 1, 1, 0, |
8c1a1077 PJ |
2747 | doc: /* Return t if FILENAME names an existing directory. |
2748 | Symbolic links to directories count as directories. | |
2749 | See `file-symlink-p' to distinguish symlinks. */) | |
2750 | (filename) | |
570d7624 JB |
2751 | Lisp_Object filename; |
2752 | { | |
199607e4 | 2753 | register Lisp_Object absname; |
570d7624 | 2754 | struct stat st; |
32f4334d | 2755 | Lisp_Object handler; |
570d7624 | 2756 | |
199607e4 | 2757 | absname = expand_and_dir_to_file (filename, current_buffer->directory); |
570d7624 | 2758 | |
32f4334d RS |
2759 | /* If the file name has special constructs in it, |
2760 | call the corresponding file handler. */ | |
199607e4 | 2761 | handler = Ffind_file_name_handler (absname, Qfile_directory_p); |
32f4334d | 2762 | if (!NILP (handler)) |
199607e4 | 2763 | return call2 (handler, Qfile_directory_p, absname); |
32f4334d | 2764 | |
b1d1b865 RS |
2765 | absname = ENCODE_FILE (absname); |
2766 | ||
d5db4077 | 2767 | if (stat (SDATA (absname), &st) < 0) |
570d7624 JB |
2768 | return Qnil; |
2769 | return (st.st_mode & S_IFMT) == S_IFDIR ? Qt : Qnil; | |
2770 | } | |
2771 | ||
b72dea2a | 2772 | DEFUN ("file-accessible-directory-p", Ffile_accessible_directory_p, Sfile_accessible_directory_p, 1, 1, 0, |
e385ec41 RS |
2773 | doc: /* Return t if file FILENAME names a directory you can open. |
2774 | For the value to be t, FILENAME must specify the name of a directory as a file, | |
2775 | and the directory must allow you to open files in it. In order to use a | |
8c1a1077 PJ |
2776 | directory as a buffer's current directory, this predicate must return true. |
2777 | A directory name spec may be given instead; then the value is t | |
2778 | if the directory so specified exists and really is a readable and | |
2779 | searchable directory. */) | |
2780 | (filename) | |
b72dea2a JB |
2781 | Lisp_Object filename; |
2782 | { | |
32f4334d | 2783 | Lisp_Object handler; |
1a04498e | 2784 | int tem; |
d26859eb | 2785 | struct gcpro gcpro1; |
32f4334d RS |
2786 | |
2787 | /* If the file name has special constructs in it, | |
2788 | call the corresponding file handler. */ | |
49307295 | 2789 | handler = Ffind_file_name_handler (filename, Qfile_accessible_directory_p); |
32f4334d RS |
2790 | if (!NILP (handler)) |
2791 | return call2 (handler, Qfile_accessible_directory_p, filename); | |
2792 | ||
d26859eb | 2793 | GCPRO1 (filename); |
1a04498e KH |
2794 | tem = (NILP (Ffile_directory_p (filename)) |
2795 | || NILP (Ffile_executable_p (filename))); | |
d26859eb | 2796 | UNGCPRO; |
1a04498e | 2797 | return tem ? Qnil : Qt; |
b72dea2a JB |
2798 | } |
2799 | ||
f793dc6c | 2800 | DEFUN ("file-regular-p", Ffile_regular_p, Sfile_regular_p, 1, 1, 0, |
19a9c3b7 LH |
2801 | doc: /* Return t if FILENAME names a regular file. |
2802 | This is the sort of file that holds an ordinary stream of data bytes. | |
2803 | Symbolic links to regular files count as regular files. | |
2804 | See `file-symlink-p' to distinguish symlinks. */) | |
8c1a1077 | 2805 | (filename) |
f793dc6c RS |
2806 | Lisp_Object filename; |
2807 | { | |
199607e4 | 2808 | register Lisp_Object absname; |
f793dc6c RS |
2809 | struct stat st; |
2810 | Lisp_Object handler; | |
2811 | ||
199607e4 | 2812 | absname = expand_and_dir_to_file (filename, current_buffer->directory); |
f793dc6c RS |
2813 | |
2814 | /* If the file name has special constructs in it, | |
2815 | call the corresponding file handler. */ | |
199607e4 | 2816 | handler = Ffind_file_name_handler (absname, Qfile_regular_p); |
f793dc6c | 2817 | if (!NILP (handler)) |
199607e4 | 2818 | return call2 (handler, Qfile_regular_p, absname); |
f793dc6c | 2819 | |
b1d1b865 RS |
2820 | absname = ENCODE_FILE (absname); |
2821 | ||
c1c4693e RS |
2822 | #ifdef WINDOWSNT |
2823 | { | |
2824 | int result; | |
2825 | Lisp_Object tem = Vw32_get_true_file_attributes; | |
2826 | ||
2827 | /* Tell stat to use expensive method to get accurate info. */ | |
2828 | Vw32_get_true_file_attributes = Qt; | |
d5db4077 | 2829 | result = stat (SDATA (absname), &st); |
c1c4693e RS |
2830 | Vw32_get_true_file_attributes = tem; |
2831 | ||
2832 | if (result < 0) | |
2833 | return Qnil; | |
2834 | return (st.st_mode & S_IFMT) == S_IFREG ? Qt : Qnil; | |
2835 | } | |
2836 | #else | |
d5db4077 | 2837 | if (stat (SDATA (absname), &st) < 0) |
f793dc6c RS |
2838 | return Qnil; |
2839 | return (st.st_mode & S_IFMT) == S_IFREG ? Qt : Qnil; | |
c1c4693e | 2840 | #endif |
f793dc6c RS |
2841 | } |
2842 | \f | |
570d7624 | 2843 | DEFUN ("file-modes", Ffile_modes, Sfile_modes, 1, 1, 0, |
d4a42098 KS |
2844 | doc: /* Return mode bits of file named FILENAME, as an integer. |
2845 | Return nil, if file does not exist or is not accessible. */) | |
8c1a1077 | 2846 | (filename) |
570d7624 JB |
2847 | Lisp_Object filename; |
2848 | { | |
199607e4 | 2849 | Lisp_Object absname; |
570d7624 | 2850 | struct stat st; |
32f4334d | 2851 | Lisp_Object handler; |
570d7624 | 2852 | |
199607e4 | 2853 | absname = expand_and_dir_to_file (filename, current_buffer->directory); |
570d7624 | 2854 | |
32f4334d RS |
2855 | /* If the file name has special constructs in it, |
2856 | call the corresponding file handler. */ | |
199607e4 | 2857 | handler = Ffind_file_name_handler (absname, Qfile_modes); |
32f4334d | 2858 | if (!NILP (handler)) |
199607e4 | 2859 | return call2 (handler, Qfile_modes, absname); |
32f4334d | 2860 | |
b1d1b865 RS |
2861 | absname = ENCODE_FILE (absname); |
2862 | ||
d5db4077 | 2863 | if (stat (SDATA (absname), &st) < 0) |
570d7624 | 2864 | return Qnil; |
34ead71a | 2865 | #if defined (MSDOS) && __DJGPP__ < 2 |
d5db4077 | 2866 | if (check_executable (SDATA (absname))) |
3be3c08e | 2867 | st.st_mode |= S_IEXEC; |
34ead71a | 2868 | #endif /* MSDOS && __DJGPP__ < 2 */ |
3ace87e3 | 2869 | |
570d7624 JB |
2870 | return make_number (st.st_mode & 07777); |
2871 | } | |
2872 | ||
09fbdf6c MC |
2873 | DEFUN ("set-file-modes", Fset_file_modes, Sset_file_modes, 2, 2, |
2874 | "(let ((file (read-file-name \"File: \"))) \ | |
2875 | (list file (read-file-modes nil file)))", | |
8c1a1077 | 2876 | doc: /* Set mode bits of file named FILENAME to MODE (an integer). |
ea429250 EZ |
2877 | Only the 12 low bits of MODE are used. |
2878 | ||
2879 | Interactively, mode bits are read by `read-file-modes', which accepts | |
712adc82 | 2880 | symbolic notation, like the `chmod' command from GNU Coreutils. */) |
570d7624 JB |
2881 | (filename, mode) |
2882 | Lisp_Object filename, mode; | |
2883 | { | |
b1d1b865 | 2884 | Lisp_Object absname, encoded_absname; |
32f4334d | 2885 | Lisp_Object handler; |
570d7624 | 2886 | |
199607e4 | 2887 | absname = Fexpand_file_name (filename, current_buffer->directory); |
b7826503 | 2888 | CHECK_NUMBER (mode); |
570d7624 | 2889 | |
32f4334d RS |
2890 | /* If the file name has special constructs in it, |
2891 | call the corresponding file handler. */ | |
199607e4 | 2892 | handler = Ffind_file_name_handler (absname, Qset_file_modes); |
32f4334d | 2893 | if (!NILP (handler)) |
199607e4 | 2894 | return call3 (handler, Qset_file_modes, absname, mode); |
32f4334d | 2895 | |
b1d1b865 RS |
2896 | encoded_absname = ENCODE_FILE (absname); |
2897 | ||
d5db4077 | 2898 | if (chmod (SDATA (encoded_absname), XINT (mode)) < 0) |
199607e4 | 2899 | report_file_error ("Doing chmod", Fcons (absname, Qnil)); |
570d7624 JB |
2900 | |
2901 | return Qnil; | |
2902 | } | |
2903 | ||
c24e9a53 | 2904 | DEFUN ("set-default-file-modes", Fset_default_file_modes, Sset_default_file_modes, 1, 1, 0, |
8c1a1077 PJ |
2905 | doc: /* Set the file permission bits for newly created files. |
2906 | The argument MODE should be an integer; only the low 9 bits are used. | |
2907 | This setting is inherited by subprocesses. */) | |
2908 | (mode) | |
5f85ea58 | 2909 | Lisp_Object mode; |
36a8c287 | 2910 | { |
b7826503 | 2911 | CHECK_NUMBER (mode); |
199607e4 | 2912 | |
5f85ea58 | 2913 | umask ((~ XINT (mode)) & 0777); |
36a8c287 JB |
2914 | |
2915 | return Qnil; | |
2916 | } | |
2917 | ||
c24e9a53 | 2918 | DEFUN ("default-file-modes", Fdefault_file_modes, Sdefault_file_modes, 0, 0, 0, |
8c1a1077 PJ |
2919 | doc: /* Return the default file protection for created files. |
2920 | The value is an integer. */) | |
2921 | () | |
36a8c287 | 2922 | { |
5f85ea58 RS |
2923 | int realmask; |
2924 | Lisp_Object value; | |
36a8c287 | 2925 | |
5f85ea58 RS |
2926 | realmask = umask (0); |
2927 | umask (realmask); | |
36a8c287 | 2928 | |
46283abe | 2929 | XSETINT (value, (~ realmask) & 0777); |
5f85ea58 | 2930 | return value; |
36a8c287 | 2931 | } |
819da85b EZ |
2932 | \f |
2933 | extern int lisp_time_argument P_ ((Lisp_Object, time_t *, int *)); | |
2934 | ||
2935 | DEFUN ("set-file-times", Fset_file_times, Sset_file_times, 1, 2, 0, | |
2936 | doc: /* Set times of file FILENAME to TIME. | |
2937 | Set both access and modification times. | |
2938 | Return t on success, else nil. | |
2939 | Use the current time if TIME is nil. TIME is in the format of | |
2940 | `current-time'. */) | |
2941 | (filename, time) | |
2942 | Lisp_Object filename, time; | |
2943 | { | |
2944 | Lisp_Object absname, encoded_absname; | |
2945 | Lisp_Object handler; | |
2946 | time_t sec; | |
2947 | int usec; | |
2948 | ||
2949 | if (! lisp_time_argument (time, &sec, &usec)) | |
2950 | error ("Invalid time specification"); | |
2951 | ||
2952 | absname = Fexpand_file_name (filename, current_buffer->directory); | |
2953 | ||
2954 | /* If the file name has special constructs in it, | |
2955 | call the corresponding file handler. */ | |
2956 | handler = Ffind_file_name_handler (absname, Qset_file_times); | |
2957 | if (!NILP (handler)) | |
2958 | return call3 (handler, Qset_file_times, absname, time); | |
2959 | ||
2960 | encoded_absname = ENCODE_FILE (absname); | |
5df5e07c | 2961 | |
819da85b EZ |
2962 | { |
2963 | EMACS_TIME t; | |
2964 | ||
2965 | EMACS_SET_SECS (t, sec); | |
2966 | EMACS_SET_USECS (t, usec); | |
2967 | ||
2968 | if (set_file_times (SDATA (encoded_absname), t, t)) | |
2969 | { | |
2970 | #ifdef DOS_NT | |
2971 | struct stat st; | |
2972 | ||
2973 | /* Setting times on a directory always fails. */ | |
2974 | if (stat (SDATA (encoded_absname), &st) == 0 | |
2975 | && (st.st_mode & S_IFMT) == S_IFDIR) | |
2976 | return Qnil; | |
2977 | #endif | |
2978 | report_file_error ("Setting file times", Fcons (absname, Qnil)); | |
2979 | return Qnil; | |
2980 | } | |
2981 | } | |
5df5e07c | 2982 | |
819da85b EZ |
2983 | return Qt; |
2984 | } | |
f793dc6c | 2985 | \f |
697c17a2 | 2986 | #ifdef HAVE_SYNC |
85ffea93 | 2987 | DEFUN ("unix-sync", Funix_sync, Sunix_sync, 0, 0, "", |
8c1a1077 PJ |
2988 | doc: /* Tell Unix to finish all pending disk updates. */) |
2989 | () | |
85ffea93 RS |
2990 | { |
2991 | sync (); | |
2992 | return Qnil; | |
2993 | } | |
2994 | ||
697c17a2 | 2995 | #endif /* HAVE_SYNC */ |
85ffea93 | 2996 | |
570d7624 | 2997 | DEFUN ("file-newer-than-file-p", Ffile_newer_than_file_p, Sfile_newer_than_file_p, 2, 2, 0, |
8c1a1077 PJ |
2998 | doc: /* Return t if file FILE1 is newer than file FILE2. |
2999 | If FILE1 does not exist, the answer is nil; | |
3000 | otherwise, if FILE2 does not exist, the answer is t. */) | |
3001 | (file1, file2) | |
570d7624 JB |
3002 | Lisp_Object file1, file2; |
3003 | { | |
199607e4 | 3004 | Lisp_Object absname1, absname2; |
570d7624 JB |
3005 | struct stat st; |
3006 | int mtime1; | |
32f4334d | 3007 | Lisp_Object handler; |
09121adc | 3008 | struct gcpro gcpro1, gcpro2; |
570d7624 | 3009 | |
b7826503 PJ |
3010 | CHECK_STRING (file1); |
3011 | CHECK_STRING (file2); | |
570d7624 | 3012 | |
199607e4 RS |
3013 | absname1 = Qnil; |
3014 | GCPRO2 (absname1, file2); | |
3015 | absname1 = expand_and_dir_to_file (file1, current_buffer->directory); | |
3016 | absname2 = expand_and_dir_to_file (file2, current_buffer->directory); | |
09121adc | 3017 | UNGCPRO; |
570d7624 | 3018 | |
32f4334d RS |
3019 | /* If the file name has special constructs in it, |
3020 | call the corresponding file handler. */ | |
199607e4 | 3021 | handler = Ffind_file_name_handler (absname1, Qfile_newer_than_file_p); |
51cf6d37 | 3022 | if (NILP (handler)) |
199607e4 | 3023 | handler = Ffind_file_name_handler (absname2, Qfile_newer_than_file_p); |
32f4334d | 3024 | if (!NILP (handler)) |
199607e4 | 3025 | return call3 (handler, Qfile_newer_than_file_p, absname1, absname2); |
32f4334d | 3026 | |
b1d1b865 RS |
3027 | GCPRO2 (absname1, absname2); |
3028 | absname1 = ENCODE_FILE (absname1); | |
3029 | absname2 = ENCODE_FILE (absname2); | |
3030 | UNGCPRO; | |
3031 | ||
d5db4077 | 3032 | if (stat (SDATA (absname1), &st) < 0) |
570d7624 JB |
3033 | return Qnil; |
3034 | ||
3035 | mtime1 = st.st_mtime; | |
3036 | ||
d5db4077 | 3037 | if (stat (SDATA (absname2), &st) < 0) |
570d7624 JB |
3038 | return Qt; |
3039 | ||
3040 | return (mtime1 > st.st_mtime) ? Qt : Qnil; | |
3041 | } | |
3042 | \f | |
5e570b75 | 3043 | #ifdef DOS_NT |
4c3c22f3 | 3044 | Lisp_Object Qfind_buffer_file_type; |
5e570b75 | 3045 | #endif /* DOS_NT */ |
4c3c22f3 | 3046 | |
6fdaa9a0 KH |
3047 | #ifndef READ_BUF_SIZE |
3048 | #define READ_BUF_SIZE (64 << 10) | |
3049 | #endif | |
3050 | ||
98a7d268 KH |
3051 | /* This function is called after Lisp functions to decide a coding |
3052 | system are called, or when they cause an error. Before they are | |
3053 | called, the current buffer is set unibyte and it contains only a | |
3054 | newly inserted text (thus the buffer was empty before the | |
3055 | insertion). | |
3056 | ||
3057 | The functions may set markers, overlays, text properties, or even | |
3058 | alter the buffer contents, change the current buffer. | |
3059 | ||
3060 | Here, we reset all those changes by: | |
3061 | o set back the current buffer. | |
3062 | o move all markers and overlays to BEG. | |
3063 | o remove all text properties. | |
3064 | o set back the buffer multibyteness. */ | |
f736ffbf KH |
3065 | |
3066 | static Lisp_Object | |
98a7d268 KH |
3067 | decide_coding_unwind (unwind_data) |
3068 | Lisp_Object unwind_data; | |
f736ffbf | 3069 | { |
98a7d268 | 3070 | Lisp_Object multibyte, undo_list, buffer; |
f736ffbf | 3071 | |
98a7d268 KH |
3072 | multibyte = XCAR (unwind_data); |
3073 | unwind_data = XCDR (unwind_data); | |
3074 | undo_list = XCAR (unwind_data); | |
3075 | buffer = XCDR (unwind_data); | |
3076 | ||
3077 | if (current_buffer != XBUFFER (buffer)) | |
3078 | set_buffer_internal (XBUFFER (buffer)); | |
3079 | adjust_markers_for_delete (BEG, BEG_BYTE, Z, Z_BYTE); | |
3080 | adjust_overlays_for_delete (BEG, Z - BEG); | |
3081 | BUF_INTERVALS (current_buffer) = 0; | |
3082 | TEMP_SET_PT_BOTH (BEG, BEG_BYTE); | |
3083 | ||
3084 | /* Now we are safe to change the buffer's multibyteness directly. */ | |
3085 | current_buffer->enable_multibyte_characters = multibyte; | |
3086 | current_buffer->undo_list = undo_list; | |
f736ffbf KH |
3087 | |
3088 | return Qnil; | |
3089 | } | |
3090 | ||
55587f8a | 3091 | |
1b978129 | 3092 | /* Used to pass values from insert-file-contents to read_non_regular. */ |
55587f8a | 3093 | |
1b978129 | 3094 | static int non_regular_fd; |
ae19ba7c SM |
3095 | static EMACS_INT non_regular_inserted; |
3096 | static EMACS_INT non_regular_nbytes; | |
55587f8a | 3097 | |
55587f8a | 3098 | |
1b978129 GM |
3099 | /* Read from a non-regular file. |
3100 | Read non_regular_trytry bytes max from non_regular_fd. | |
3101 | Non_regular_inserted specifies where to put the read bytes. | |
3102 | Value is the number of bytes read. */ | |
55587f8a GM |
3103 | |
3104 | static Lisp_Object | |
1b978129 | 3105 | read_non_regular () |
55587f8a | 3106 | { |
ae19ba7c | 3107 | EMACS_INT nbytes; |
efdc16c9 | 3108 | |
1b978129 GM |
3109 | immediate_quit = 1; |
3110 | QUIT; | |
3111 | nbytes = emacs_read (non_regular_fd, | |
28c3eb5a | 3112 | BEG_ADDR + PT_BYTE - BEG_BYTE + non_regular_inserted, |
1b978129 | 3113 | non_regular_nbytes); |
1b978129 GM |
3114 | immediate_quit = 0; |
3115 | return make_number (nbytes); | |
3116 | } | |
55587f8a | 3117 | |
d0e2444e | 3118 | |
1b978129 GM |
3119 | /* Condition-case handler used when reading from non-regular files |
3120 | in insert-file-contents. */ | |
3121 | ||
3122 | static Lisp_Object | |
3123 | read_non_regular_quit () | |
3124 | { | |
55587f8a GM |
3125 | return Qnil; |
3126 | } | |
3127 | ||
3128 | ||
570d7624 | 3129 | DEFUN ("insert-file-contents", Finsert_file_contents, Sinsert_file_contents, |
8c1a1077 PJ |
3130 | 1, 5, 0, |
3131 | doc: /* Insert contents of file FILENAME after point. | |
cf6d2357 | 3132 | Returns list of absolute file name and number of characters inserted. |
6f2528d8 MR |
3133 | If second argument VISIT is non-nil, the buffer's visited filename and |
3134 | last save file modtime are set, and it is marked unmodified. If | |
3135 | visiting and the file does not exist, visiting is completed before the | |
3136 | error is signaled. | |
3137 | ||
3138 | The optional third and fourth arguments BEG and END specify what portion | |
3139 | of the file to insert. These arguments count bytes in the file, not | |
3140 | characters in the buffer. If VISIT is non-nil, BEG and END must be nil. | |
3141 | ||
3142 | If optional fifth argument REPLACE is non-nil, replace the current | |
3143 | buffer contents (in the accessible portion) with the file contents. | |
3144 | This is better than simply deleting and inserting the whole thing | |
3145 | because (1) it preserves some marker positions and (2) it puts less data | |
3146 | in the undo list. When REPLACE is non-nil, the second return value is | |
3147 | the number of characters that replace previous buffer contents. | |
3148 | ||
3149 | This function does code conversion according to the value of | |
3150 | `coding-system-for-read' or `file-coding-system-alist', and sets the | |
3151 | variable `last-coding-system-used' to the coding system actually used. */) | |
8c1a1077 | 3152 | (filename, visit, beg, end, replace) |
3d0387c0 | 3153 | Lisp_Object filename, visit, beg, end, replace; |
570d7624 JB |
3154 | { |
3155 | struct stat st; | |
3156 | register int fd; | |
ae19ba7c | 3157 | EMACS_INT inserted = 0; |
18a9f8d9 | 3158 | int nochange = 0; |
ae19ba7c SM |
3159 | register EMACS_INT how_much; |
3160 | register EMACS_INT unprocessed; | |
331379bf | 3161 | int count = SPECPDL_INDEX (); |
6f2528d8 MR |
3162 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4, gcpro5; |
3163 | Lisp_Object handler, val, insval, orig_filename, old_undo; | |
d6a3cc15 | 3164 | Lisp_Object p; |
ae19ba7c | 3165 | EMACS_INT total = 0; |
53c34c46 | 3166 | int not_regular = 0; |
feb9dc27 | 3167 | unsigned char read_buf[READ_BUF_SIZE]; |
6fdaa9a0 | 3168 | struct coding_system coding; |
3dbcf3f6 | 3169 | unsigned char buffer[1 << 14]; |
727a0b4a | 3170 | int replace_handled = 0; |
ec7adf26 | 3171 | int set_coding_system = 0; |
db327c7e | 3172 | Lisp_Object coding_system; |
1b978129 | 3173 | int read_quit = 0; |
490ee853 | 3174 | Lisp_Object old_Vdeactivate_mark = Vdeactivate_mark; |
68780e2a | 3175 | int we_locked_file = 0; |
db65a627 | 3176 | int deferred_remove_unwind_protect = 0; |
32f4334d | 3177 | |
95385625 RS |
3178 | if (current_buffer->base_buffer && ! NILP (visit)) |
3179 | error ("Cannot do file visiting in an indirect buffer"); | |
3180 | ||
3181 | if (!NILP (current_buffer->read_only)) | |
3182 | Fbarf_if_buffer_read_only (); | |
3183 | ||
32f4334d | 3184 | val = Qnil; |
d6a3cc15 | 3185 | p = Qnil; |
b1d1b865 | 3186 | orig_filename = Qnil; |
6f2528d8 | 3187 | old_undo = Qnil; |
32f4334d | 3188 | |
6f2528d8 | 3189 | GCPRO5 (filename, val, p, orig_filename, old_undo); |
570d7624 | 3190 | |
b7826503 | 3191 | CHECK_STRING (filename); |
570d7624 JB |
3192 | filename = Fexpand_file_name (filename, Qnil); |
3193 | ||
1c157f8d KH |
3194 | /* The value Qnil means that the coding system is not yet |
3195 | decided. */ | |
3196 | coding_system = Qnil; | |
3197 | ||
32f4334d RS |
3198 | /* If the file name has special constructs in it, |
3199 | call the corresponding file handler. */ | |
49307295 | 3200 | handler = Ffind_file_name_handler (filename, Qinsert_file_contents); |
32f4334d RS |
3201 | if (!NILP (handler)) |
3202 | { | |
3d0387c0 RS |
3203 | val = call6 (handler, Qinsert_file_contents, filename, |
3204 | visit, beg, end, replace); | |
03699b14 KR |
3205 | if (CONSP (val) && CONSP (XCDR (val))) |
3206 | inserted = XINT (XCAR (XCDR (val))); | |
32f4334d RS |
3207 | goto handled; |
3208 | } | |
3209 | ||
b1d1b865 RS |
3210 | orig_filename = filename; |
3211 | filename = ENCODE_FILE (filename); | |
3212 | ||
570d7624 JB |
3213 | fd = -1; |
3214 | ||
c1c4693e RS |
3215 | #ifdef WINDOWSNT |
3216 | { | |
3217 | Lisp_Object tem = Vw32_get_true_file_attributes; | |
3218 | ||
3219 | /* Tell stat to use expensive method to get accurate info. */ | |
3220 | Vw32_get_true_file_attributes = Qt; | |
d5db4077 | 3221 | total = stat (SDATA (filename), &st); |
c1c4693e RS |
3222 | Vw32_get_true_file_attributes = tem; |
3223 | } | |
3224 | if (total < 0) | |
3225 | #else | |
d5db4077 | 3226 | if (stat (SDATA (filename), &st) < 0) |
c1c4693e | 3227 | #endif /* WINDOWSNT */ |
570d7624 | 3228 | { |
68c45bf0 | 3229 | if (fd >= 0) emacs_close (fd); |
99bc28f4 | 3230 | badopen: |
265a9e55 | 3231 | if (NILP (visit)) |
b1d1b865 | 3232 | report_file_error ("Opening input file", Fcons (orig_filename, Qnil)); |
570d7624 JB |
3233 | st.st_mtime = -1; |
3234 | how_much = 0; | |
0de6b8f4 | 3235 | if (!NILP (Vcoding_system_for_read)) |
22d92d6b | 3236 | Fset (Qbuffer_file_coding_system, Vcoding_system_for_read); |
570d7624 JB |
3237 | goto notfound; |
3238 | } | |
3239 | ||
99bc28f4 | 3240 | #ifdef S_IFREG |
be53b411 JB |
3241 | /* This code will need to be changed in order to work on named |
3242 | pipes, and it's probably just not worth it. So we should at | |
3243 | least signal an error. */ | |
99bc28f4 | 3244 | if (!S_ISREG (st.st_mode)) |
330bfe57 | 3245 | { |
d4b8687b RS |
3246 | not_regular = 1; |
3247 | ||
3248 | if (! NILP (visit)) | |
3249 | goto notfound; | |
3250 | ||
3251 | if (! NILP (replace) || ! NILP (beg) || ! NILP (end)) | |
24b1ddad KS |
3252 | xsignal2 (Qfile_error, |
3253 | build_string ("not a regular file"), orig_filename); | |
330bfe57 | 3254 | } |
be53b411 JB |
3255 | #endif |
3256 | ||
99bc28f4 | 3257 | if (fd < 0) |
d5db4077 | 3258 | if ((fd = emacs_open (SDATA (filename), O_RDONLY, 0)) < 0) |
99bc28f4 KH |
3259 | goto badopen; |
3260 | ||
3261 | /* Replacement should preserve point as it preserves markers. */ | |
3262 | if (!NILP (replace)) | |
3263 | record_unwind_protect (restore_point_unwind, Fpoint_marker ()); | |
3264 | ||
3265 | record_unwind_protect (close_file_unwind, make_number (fd)); | |
3266 | ||
11d300db | 3267 | /* Can happen on any platform that uses long as type of off_t, but allows |
7c2fb837 | 3268 | file sizes to exceed 2Gb, so give a suitable message. */ |
d4b8687b | 3269 | if (! not_regular && st.st_size < 0) |
11d300db | 3270 | error ("Maximum buffer size exceeded"); |
be53b411 | 3271 | |
9c856db9 GM |
3272 | /* Prevent redisplay optimizations. */ |
3273 | current_buffer->clip_changed = 1; | |
3274 | ||
9f57b6b4 KH |
3275 | if (!NILP (visit)) |
3276 | { | |
3277 | if (!NILP (beg) || !NILP (end)) | |
3278 | error ("Attempt to visit less than an entire file"); | |
3279 | if (BEG < Z && NILP (replace)) | |
3280 | error ("Cannot do file visiting in a non-empty buffer"); | |
3281 | } | |
7fded690 JB |
3282 | |
3283 | if (!NILP (beg)) | |
b7826503 | 3284 | CHECK_NUMBER (beg); |
7fded690 | 3285 | else |
2acfd7ae | 3286 | XSETFASTINT (beg, 0); |
7fded690 JB |
3287 | |
3288 | if (!NILP (end)) | |
b7826503 | 3289 | CHECK_NUMBER (end); |
7fded690 JB |
3290 | else |
3291 | { | |
d4b8687b RS |
3292 | if (! not_regular) |
3293 | { | |
3294 | XSETINT (end, st.st_size); | |
68c45bf0 PE |
3295 | |
3296 | /* Arithmetic overflow can occur if an Emacs integer cannot | |
3297 | represent the file size, or if the calculations below | |
3298 | overflow. The calculations below double the file size | |
3299 | twice, so check that it can be multiplied by 4 safely. */ | |
3300 | if (XINT (end) != st.st_size | |
ab226c50 SM |
3301 | /* Actually, it should test either INT_MAX or LONG_MAX |
3302 | depending on which one is used for EMACS_INT. But in | |
3303 | any case, in practice, this test is redundant with the | |
3304 | one above. | |
3305 | || st.st_size > INT_MAX / 4 */) | |
d4b8687b | 3306 | error ("Maximum buffer size exceeded"); |
d21dd12d GM |
3307 | |
3308 | /* The file size returned from stat may be zero, but data | |
3309 | may be readable nonetheless, for example when this is a | |
3310 | file in the /proc filesystem. */ | |
3311 | if (st.st_size == 0) | |
3312 | XSETINT (end, READ_BUF_SIZE); | |
d4b8687b | 3313 | } |
7fded690 JB |
3314 | } |
3315 | ||
356a6224 | 3316 | if (EQ (Vcoding_system_for_read, Qauto_save_coding)) |
5560aecd | 3317 | { |
75421805 | 3318 | coding_system = coding_inherit_eol_type (Qutf_8_emacs, Qunix); |
5560aecd KH |
3319 | setup_coding_system (coding_system, &coding); |
3320 | /* Ensure we set Vlast_coding_system_used. */ | |
3321 | set_coding_system = 1; | |
3322 | } | |
356a6224 | 3323 | else if (BEG < Z) |
f736ffbf KH |
3324 | { |
3325 | /* Decide the coding system to use for reading the file now | |
3326 | because we can't use an optimized method for handling | |
3327 | `coding:' tag if the current buffer is not empty. */ | |
f736ffbf | 3328 | if (!NILP (Vcoding_system_for_read)) |
db327c7e | 3329 | coding_system = Vcoding_system_for_read; |
f736ffbf KH |
3330 | else |
3331 | { | |
3332 | /* Don't try looking inside a file for a coding system | |
3333 | specification if it is not seekable. */ | |
3334 | if (! not_regular && ! NILP (Vset_auto_coding_function)) | |
3335 | { | |
3336 | /* Find a coding system specified in the heading two | |
3337 | lines or in the tailing several lines of the file. | |
3338 | We assume that the 1K-byte and 3K-byte for heading | |
003a7eaa | 3339 | and tailing respectively are sufficient for this |
f736ffbf | 3340 | purpose. */ |
ae19ba7c | 3341 | EMACS_INT nread; |
f736ffbf KH |
3342 | |
3343 | if (st.st_size <= (1024 * 4)) | |
68c45bf0 | 3344 | nread = emacs_read (fd, read_buf, 1024 * 4); |
f736ffbf KH |
3345 | else |
3346 | { | |
68c45bf0 | 3347 | nread = emacs_read (fd, read_buf, 1024); |
f736ffbf KH |
3348 | if (nread >= 0) |
3349 | { | |
3350 | if (lseek (fd, st.st_size - (1024 * 3), 0) < 0) | |
3351 | report_file_error ("Setting file position", | |
3352 | Fcons (orig_filename, Qnil)); | |
68c45bf0 | 3353 | nread += emacs_read (fd, read_buf + nread, 1024 * 3); |
f736ffbf KH |
3354 | } |
3355 | } | |
feb9dc27 | 3356 | |
f736ffbf KH |
3357 | if (nread < 0) |
3358 | error ("IO error reading %s: %s", | |
d5db4077 | 3359 | SDATA (orig_filename), emacs_strerror (errno)); |
f736ffbf KH |
3360 | else if (nread > 0) |
3361 | { | |
f736ffbf | 3362 | struct buffer *prev = current_buffer; |
685fc579 RS |
3363 | Lisp_Object buffer; |
3364 | struct buffer *buf; | |
f736ffbf KH |
3365 | |
3366 | record_unwind_protect (Fset_buffer, Fcurrent_buffer ()); | |
1d92afcd | 3367 | |
685fc579 RS |
3368 | buffer = Fget_buffer_create (build_string (" *code-converting-work*")); |
3369 | buf = XBUFFER (buffer); | |
3370 | ||
29ea8ae9 | 3371 | delete_all_overlays (buf); |
685fc579 RS |
3372 | buf->directory = current_buffer->directory; |
3373 | buf->read_only = Qnil; | |
3374 | buf->filename = Qnil; | |
3375 | buf->undo_list = Qt; | |
29ea8ae9 SM |
3376 | eassert (buf->overlays_before == NULL); |
3377 | eassert (buf->overlays_after == NULL); | |
efdc16c9 | 3378 | |
685fc579 RS |
3379 | set_buffer_internal (buf); |
3380 | Ferase_buffer (); | |
3381 | buf->enable_multibyte_characters = Qnil; | |
3382 | ||
f736ffbf KH |
3383 | insert_1_both (read_buf, nread, nread, 0, 0, 0); |
3384 | TEMP_SET_PT_BOTH (BEG, BEG_BYTE); | |
db327c7e | 3385 | coding_system = call2 (Vset_auto_coding_function, |
8f924df7 | 3386 | filename, make_number (nread)); |
f736ffbf | 3387 | set_buffer_internal (prev); |
efdc16c9 | 3388 | |
f736ffbf KH |
3389 | /* Discard the unwind protect for recovering the |
3390 | current buffer. */ | |
3391 | specpdl_ptr--; | |
3392 | ||
3393 | /* Rewind the file for the actual read done later. */ | |
3394 | if (lseek (fd, 0, 0) < 0) | |
3395 | report_file_error ("Setting file position", | |
3396 | Fcons (orig_filename, Qnil)); | |
3397 | } | |
3398 | } | |
feb9dc27 | 3399 | |
db327c7e | 3400 | if (NILP (coding_system)) |
f736ffbf KH |
3401 | { |
3402 | /* If we have not yet decided a coding system, check | |
3403 | file-coding-system-alist. */ | |
8f924df7 | 3404 | Lisp_Object args[6]; |
f736ffbf KH |
3405 | |
3406 | args[0] = Qinsert_file_contents, args[1] = orig_filename; | |
3407 | args[2] = visit, args[3] = beg, args[4] = end, args[5] = replace; | |
8f924df7 KH |
3408 | coding_system = Ffind_operation_coding_system (6, args); |
3409 | if (CONSP (coding_system)) | |
3410 | coding_system = XCAR (coding_system); | |
f736ffbf KH |
3411 | } |
3412 | } | |
c9e82392 | 3413 | |
db327c7e KH |
3414 | if (NILP (coding_system)) |
3415 | coding_system = Qundecided; | |
3416 | else | |
3417 | CHECK_CODING_SYSTEM (coding_system); | |
c8a6d68a | 3418 | |
db327c7e | 3419 | if (NILP (current_buffer->enable_multibyte_characters)) |
237a6fd2 RS |
3420 | /* We must suppress all character code conversion except for |
3421 | end-of-line conversion. */ | |
db327c7e | 3422 | coding_system = raw_text_coding_system (coding_system); |
54369368 | 3423 | |
db327c7e KH |
3424 | setup_coding_system (coding_system, &coding); |
3425 | /* Ensure we set Vlast_coding_system_used. */ | |
3426 | set_coding_system = 1; | |
f736ffbf | 3427 | } |
6cf71bf1 | 3428 | |
3d0387c0 RS |
3429 | /* If requested, replace the accessible part of the buffer |
3430 | with the file contents. Avoid replacing text at the | |
3431 | beginning or end of the buffer that matches the file contents; | |
3dbcf3f6 RS |
3432 | that preserves markers pointing to the unchanged parts. |
3433 | ||
3434 | Here we implement this feature in an optimized way | |
3435 | for the case where code conversion is NOT needed. | |
3436 | The following if-statement handles the case of conversion | |
727a0b4a RS |
3437 | in a less optimal way. |
3438 | ||
3439 | If the code conversion is "automatic" then we try using this | |
3440 | method and hope for the best. | |
3441 | But if we discover the need for conversion, we give up on this method | |
3442 | and let the following if-statement handle the replace job. */ | |
3dbcf3f6 | 3443 | if (!NILP (replace) |
f736ffbf | 3444 | && BEGV < ZV |
db327c7e KH |
3445 | && (NILP (coding_system) |
3446 | || ! CODING_REQUIRE_DECODING (&coding))) | |
3d0387c0 | 3447 | { |
ec7adf26 RS |
3448 | /* same_at_start and same_at_end count bytes, |
3449 | because file access counts bytes | |
3450 | and BEG and END count bytes. */ | |
ae19ba7c SM |
3451 | EMACS_INT same_at_start = BEGV_BYTE; |
3452 | EMACS_INT same_at_end = ZV_BYTE; | |
3453 | EMACS_INT overlap; | |
6fdaa9a0 KH |
3454 | /* There is still a possibility we will find the need to do code |
3455 | conversion. If that happens, we set this variable to 1 to | |
727a0b4a | 3456 | give up on handling REPLACE in the optimized way. */ |
6fdaa9a0 | 3457 | int giveup_match_end = 0; |
9c28748f | 3458 | |
4d2a0879 RS |
3459 | if (XINT (beg) != 0) |
3460 | { | |
3461 | if (lseek (fd, XINT (beg), 0) < 0) | |
3462 | report_file_error ("Setting file position", | |
b1d1b865 | 3463 | Fcons (orig_filename, Qnil)); |
4d2a0879 RS |
3464 | } |
3465 | ||
3d0387c0 RS |
3466 | immediate_quit = 1; |
3467 | QUIT; | |
3468 | /* Count how many chars at the start of the file | |
3469 | match the text at the beginning of the buffer. */ | |
3470 | while (1) | |
3471 | { | |
ae19ba7c | 3472 | EMACS_INT nread, bufpos; |
3d0387c0 | 3473 | |
68c45bf0 | 3474 | nread = emacs_read (fd, buffer, sizeof buffer); |
3d0387c0 RS |
3475 | if (nread < 0) |
3476 | error ("IO error reading %s: %s", | |
d5db4077 | 3477 | SDATA (orig_filename), emacs_strerror (errno)); |
3d0387c0 RS |
3478 | else if (nread == 0) |
3479 | break; | |
6fdaa9a0 | 3480 | |
db327c7e | 3481 | if (CODING_REQUIRE_DETECTION (&coding)) |
727a0b4a | 3482 | { |
5b359650 | 3483 | coding_system = detect_coding_system (buffer, nread, nread, 1, 0, |
db327c7e KH |
3484 | coding_system); |
3485 | setup_coding_system (coding_system, &coding); | |
727a0b4a RS |
3486 | } |
3487 | ||
db327c7e KH |
3488 | if (CODING_REQUIRE_DECODING (&coding)) |
3489 | /* We found that the file should be decoded somehow. | |
727a0b4a RS |
3490 | Let's give up here. */ |
3491 | { | |
3492 | giveup_match_end = 1; | |
3493 | break; | |
3494 | } | |
3495 | ||
3d0387c0 | 3496 | bufpos = 0; |
ec7adf26 | 3497 | while (bufpos < nread && same_at_start < ZV_BYTE |
6fdaa9a0 | 3498 | && FETCH_BYTE (same_at_start) == buffer[bufpos]) |
3d0387c0 RS |
3499 | same_at_start++, bufpos++; |
3500 | /* If we found a discrepancy, stop the scan. | |
8e6208c5 | 3501 | Otherwise loop around and scan the next bufferful. */ |
3d0387c0 RS |
3502 | if (bufpos != nread) |
3503 | break; | |
3504 | } | |
3505 | immediate_quit = 0; | |
3506 | /* If the file matches the buffer completely, | |
3507 | there's no need to replace anything. */ | |
ec7adf26 | 3508 | if (same_at_start - BEGV_BYTE == XINT (end)) |
3d0387c0 | 3509 | { |
68c45bf0 | 3510 | emacs_close (fd); |
a1d2b64a | 3511 | specpdl_ptr--; |
1051b3b3 | 3512 | /* Truncate the buffer to the size of the file. */ |
7dae4502 | 3513 | del_range_1 (same_at_start, same_at_end, 0, 0); |
3d0387c0 RS |
3514 | goto handled; |
3515 | } | |
3516 | immediate_quit = 1; | |
3517 | QUIT; | |
3518 | /* Count how many chars at the end of the file | |
6fdaa9a0 KH |
3519 | match the text at the end of the buffer. But, if we have |
3520 | already found that decoding is necessary, don't waste time. */ | |
3521 | while (!giveup_match_end) | |
3d0387c0 | 3522 | { |
ae19ba7c | 3523 | EMACS_INT total_read, nread, bufpos, curpos, trial; |
3d0387c0 RS |
3524 | |
3525 | /* At what file position are we now scanning? */ | |
ec7adf26 | 3526 | curpos = XINT (end) - (ZV_BYTE - same_at_end); |
fc81fa9e KH |
3527 | /* If the entire file matches the buffer tail, stop the scan. */ |
3528 | if (curpos == 0) | |
3529 | break; | |
3d0387c0 RS |
3530 | /* How much can we scan in the next step? */ |
3531 | trial = min (curpos, sizeof buffer); | |
3532 | if (lseek (fd, curpos - trial, 0) < 0) | |
3533 | report_file_error ("Setting file position", | |
b1d1b865 | 3534 | Fcons (orig_filename, Qnil)); |
3d0387c0 | 3535 | |
b02439c8 | 3536 | total_read = nread = 0; |
3d0387c0 RS |
3537 | while (total_read < trial) |
3538 | { | |
68c45bf0 | 3539 | nread = emacs_read (fd, buffer + total_read, trial - total_read); |
2bd2273e | 3540 | if (nread < 0) |
3d0387c0 | 3541 | error ("IO error reading %s: %s", |
d5db4077 | 3542 | SDATA (orig_filename), emacs_strerror (errno)); |
2bd2273e GM |
3543 | else if (nread == 0) |
3544 | break; | |
3d0387c0 RS |
3545 | total_read += nread; |
3546 | } | |
efdc16c9 | 3547 | |
8e6208c5 | 3548 | /* Scan this bufferful from the end, comparing with |
3d0387c0 RS |
3549 | the Emacs buffer. */ |
3550 | bufpos = total_read; | |
efdc16c9 | 3551 | |
3d0387c0 RS |
3552 | /* Compare with same_at_start to avoid counting some buffer text |
3553 | as matching both at the file's beginning and at the end. */ | |
3554 | while (bufpos > 0 && same_at_end > same_at_start | |
6fdaa9a0 | 3555 | && FETCH_BYTE (same_at_end - 1) == buffer[bufpos - 1]) |
3d0387c0 | 3556 | same_at_end--, bufpos--; |
727a0b4a | 3557 | |
3d0387c0 | 3558 | /* If we found a discrepancy, stop the scan. |
8e6208c5 | 3559 | Otherwise loop around and scan the preceding bufferful. */ |
3d0387c0 | 3560 | if (bufpos != 0) |
727a0b4a RS |
3561 | { |
3562 | /* If this discrepancy is because of code conversion, | |
3563 | we cannot use this method; giveup and try the other. */ | |
3564 | if (same_at_end > same_at_start | |
3565 | && FETCH_BYTE (same_at_end - 1) >= 0200 | |
71312b68 | 3566 | && ! NILP (current_buffer->enable_multibyte_characters) |
c8a6d68a | 3567 | && (CODING_MAY_REQUIRE_DECODING (&coding))) |
727a0b4a RS |
3568 | giveup_match_end = 1; |
3569 | break; | |
3570 | } | |
b02439c8 GM |
3571 | |
3572 | if (nread == 0) | |
3573 | break; | |
3d0387c0 RS |
3574 | } |
3575 | immediate_quit = 0; | |
9c28748f | 3576 | |
727a0b4a RS |
3577 | if (! giveup_match_end) |
3578 | { | |
ae19ba7c | 3579 | EMACS_INT temp; |
ec7adf26 | 3580 | |
727a0b4a | 3581 | /* We win! We can handle REPLACE the optimized way. */ |
9c28748f | 3582 | |
20f6783d RS |
3583 | /* Extend the start of non-matching text area to multibyte |
3584 | character boundary. */ | |
3585 | if (! NILP (current_buffer->enable_multibyte_characters)) | |
3586 | while (same_at_start > BEGV_BYTE | |
3587 | && ! CHAR_HEAD_P (FETCH_BYTE (same_at_start))) | |
3588 | same_at_start--; | |
3589 | ||
3590 | /* Extend the end of non-matching text area to multibyte | |
71312b68 RS |
3591 | character boundary. */ |
3592 | if (! NILP (current_buffer->enable_multibyte_characters)) | |
ec7adf26 RS |
3593 | while (same_at_end < ZV_BYTE |
3594 | && ! CHAR_HEAD_P (FETCH_BYTE (same_at_end))) | |
71312b68 RS |
3595 | same_at_end++; |
3596 | ||
727a0b4a | 3597 | /* Don't try to reuse the same piece of text twice. */ |
ec7adf26 RS |
3598 | overlap = (same_at_start - BEGV_BYTE |
3599 | - (same_at_end + st.st_size - ZV)); | |
727a0b4a RS |
3600 | if (overlap > 0) |
3601 | same_at_end += overlap; | |
9c28748f | 3602 | |
727a0b4a | 3603 | /* Arrange to read only the nonmatching middle part of the file. */ |
ec7adf26 RS |
3604 | XSETFASTINT (beg, XINT (beg) + (same_at_start - BEGV_BYTE)); |
3605 | XSETFASTINT (end, XINT (end) - (ZV_BYTE - same_at_end)); | |
3dbcf3f6 | 3606 | |
ec7adf26 | 3607 | del_range_byte (same_at_start, same_at_end, 0); |
727a0b4a | 3608 | /* Insert from the file at the proper position. */ |
ec7adf26 RS |
3609 | temp = BYTE_TO_CHAR (same_at_start); |
3610 | SET_PT_BOTH (temp, same_at_start); | |
727a0b4a RS |
3611 | |
3612 | /* If display currently starts at beginning of line, | |
3613 | keep it that way. */ | |
3614 | if (XBUFFER (XWINDOW (selected_window)->buffer) == current_buffer) | |
3615 | XWINDOW (selected_window)->start_at_line_beg = Fbolp (); | |
3616 | ||
3617 | replace_handled = 1; | |
3618 | } | |
3dbcf3f6 RS |
3619 | } |
3620 | ||
3621 | /* If requested, replace the accessible part of the buffer | |
3622 | with the file contents. Avoid replacing text at the | |
3623 | beginning or end of the buffer that matches the file contents; | |
3624 | that preserves markers pointing to the unchanged parts. | |
3625 | ||
3626 | Here we implement this feature for the case where code conversion | |
3627 | is needed, in a simple way that needs a lot of memory. | |
3628 | The preceding if-statement handles the case of no conversion | |
3629 | in a more optimized way. */ | |
f736ffbf | 3630 | if (!NILP (replace) && ! replace_handled && BEGV < ZV) |
3dbcf3f6 | 3631 | { |
13818c30 SM |
3632 | EMACS_INT same_at_start = BEGV_BYTE; |
3633 | EMACS_INT same_at_end = ZV_BYTE; | |
3634 | EMACS_INT same_at_start_charpos; | |
3635 | EMACS_INT inserted_chars; | |
3636 | EMACS_INT overlap; | |
3637 | EMACS_INT bufpos; | |
db327c7e | 3638 | unsigned char *decoded; |
ae19ba7c | 3639 | EMACS_INT temp; |
8f924df7 | 3640 | int this_count = SPECPDL_INDEX (); |
59c94f03 | 3641 | int multibyte = ! NILP (current_buffer->enable_multibyte_characters); |
5b359650 | 3642 | Lisp_Object conversion_buffer; |
db327c7e | 3643 | |
5b359650 | 3644 | conversion_buffer = code_conversion_save (1, multibyte); |
3dbcf3f6 RS |
3645 | |
3646 | /* First read the whole file, performing code conversion into | |
3647 | CONVERSION_BUFFER. */ | |
3648 | ||
727a0b4a | 3649 | if (lseek (fd, XINT (beg), 0) < 0) |
8f924df7 KH |
3650 | report_file_error ("Setting file position", |
3651 | Fcons (orig_filename, Qnil)); | |
727a0b4a | 3652 | |
3dbcf3f6 RS |
3653 | total = st.st_size; /* Total bytes in the file. */ |
3654 | how_much = 0; /* Bytes read from file so far. */ | |
3655 | inserted = 0; /* Bytes put into CONVERSION_BUFFER so far. */ | |
3656 | unprocessed = 0; /* Bytes not processed in previous loop. */ | |
3657 | ||
2ba48777 | 3658 | GCPRO1 (conversion_buffer); |
3dbcf3f6 RS |
3659 | while (how_much < total) |
3660 | { | |
db327c7e KH |
3661 | /* We read one bunch by one (READ_BUF_SIZE bytes) to allow |
3662 | quitting while reading a huge while. */ | |
3dbcf3f6 | 3663 | /* try is reserved in some compilers (Microsoft C) */ |
ae19ba7c SM |
3664 | EMACS_INT trytry = min (total - how_much, |
3665 | READ_BUF_SIZE - unprocessed); | |
3666 | EMACS_INT this; | |
3dbcf3f6 RS |
3667 | |
3668 | /* Allow quitting out of the actual I/O. */ | |
3669 | immediate_quit = 1; | |
3670 | QUIT; | |
db327c7e | 3671 | this = emacs_read (fd, read_buf + unprocessed, trytry); |
3dbcf3f6 RS |
3672 | immediate_quit = 0; |
3673 | ||
db327c7e | 3674 | if (this <= 0) |
3dbcf3f6 | 3675 | { |
db327c7e KH |
3676 | if (this < 0) |
3677 | how_much = this; | |
3dbcf3f6 RS |
3678 | break; |
3679 | } | |
3680 | ||
3681 | how_much += this; | |
3682 | ||
bf1c0f27 SM |
3683 | BUF_TEMP_SET_PT (XBUFFER (conversion_buffer), |
3684 | BUF_Z (XBUFFER (conversion_buffer))); | |
db327c7e KH |
3685 | decode_coding_c_string (&coding, read_buf, unprocessed + this, |
3686 | conversion_buffer); | |
3687 | unprocessed = coding.carryover_bytes; | |
3688 | if (coding.carryover_bytes > 0) | |
3689 | bcopy (coding.carryover, read_buf, unprocessed); | |
3dbcf3f6 | 3690 | } |
2ba48777 | 3691 | UNGCPRO; |
db327c7e | 3692 | emacs_close (fd); |
3dbcf3f6 | 3693 | |
db65a627 CY |
3694 | /* We should remove the unwind_protect calling |
3695 | close_file_unwind, but other stuff has been added the stack, | |
3696 | so defer the removal till we reach the `handled' label. */ | |
3697 | deferred_remove_unwind_protect = 1; | |
3698 | ||
db327c7e KH |
3699 | /* At this point, HOW_MUCH should equal TOTAL, or should be <= 0 |
3700 | if we couldn't read the file. */ | |
3dbcf3f6 RS |
3701 | |
3702 | if (how_much < 0) | |
4ed925c6 MB |
3703 | error ("IO error reading %s: %s", |
3704 | SDATA (orig_filename), emacs_strerror (errno)); | |
3dbcf3f6 | 3705 | |
db327c7e KH |
3706 | if (unprocessed > 0) |
3707 | { | |
3708 | coding.mode |= CODING_MODE_LAST_BLOCK; | |
3709 | decode_coding_c_string (&coding, read_buf, unprocessed, | |
3710 | conversion_buffer); | |
3711 | coding.mode &= ~CODING_MODE_LAST_BLOCK; | |
3712 | } | |
3713 | ||
50b06221 | 3714 | coding_system = CODING_ID_NAME (coding.id); |
db327c7e | 3715 | decoded = BUF_BEG_ADDR (XBUFFER (conversion_buffer)); |
50342b35 KH |
3716 | inserted = (BUF_Z_BYTE (XBUFFER (conversion_buffer)) |
3717 | - BUF_BEG_BYTE (XBUFFER (conversion_buffer))); | |
db327c7e KH |
3718 | |
3719 | /* Compare the beginning of the converted string with the buffer | |
3720 | text. */ | |
3dbcf3f6 RS |
3721 | |
3722 | bufpos = 0; | |
3723 | while (bufpos < inserted && same_at_start < same_at_end | |
db327c7e | 3724 | && FETCH_BYTE (same_at_start) == decoded[bufpos]) |
3dbcf3f6 RS |
3725 | same_at_start++, bufpos++; |
3726 | ||
db327c7e | 3727 | /* If the file matches the head of buffer completely, |
3dbcf3f6 RS |
3728 | there's no need to replace anything. */ |
3729 | ||
3730 | if (bufpos == inserted) | |
3731 | { | |
3dbcf3f6 | 3732 | /* Truncate the buffer to the size of the file. */ |
18a9f8d9 SM |
3733 | if (same_at_start == same_at_end) |
3734 | nochange = 1; | |
3735 | else | |
3736 | del_range_byte (same_at_start, same_at_end, 0); | |
427f5aab | 3737 | inserted = 0; |
e8553dd1 KH |
3738 | |
3739 | unbind_to (this_count, Qnil); | |
3dbcf3f6 RS |
3740 | goto handled; |
3741 | } | |
3742 | ||
db327c7e KH |
3743 | /* Extend the start of non-matching text area to the previous |
3744 | multibyte character boundary. */ | |
20f6783d RS |
3745 | if (! NILP (current_buffer->enable_multibyte_characters)) |
3746 | while (same_at_start > BEGV_BYTE | |
3747 | && ! CHAR_HEAD_P (FETCH_BYTE (same_at_start))) | |
3748 | same_at_start--; | |
3749 | ||
3dbcf3f6 RS |
3750 | /* Scan this bufferful from the end, comparing with |
3751 | the Emacs buffer. */ | |
3752 | bufpos = inserted; | |
3753 | ||
3754 | /* Compare with same_at_start to avoid counting some buffer text | |
3755 | as matching both at the file's beginning and at the end. */ | |
3756 | while (bufpos > 0 && same_at_end > same_at_start | |
db327c7e | 3757 | && FETCH_BYTE (same_at_end - 1) == decoded[bufpos - 1]) |
3dbcf3f6 RS |
3758 | same_at_end--, bufpos--; |
3759 | ||
db327c7e KH |
3760 | /* Extend the end of non-matching text area to the next |
3761 | multibyte character boundary. */ | |
20f6783d RS |
3762 | if (! NILP (current_buffer->enable_multibyte_characters)) |
3763 | while (same_at_end < ZV_BYTE | |
3764 | && ! CHAR_HEAD_P (FETCH_BYTE (same_at_end))) | |
3765 | same_at_end++; | |
3766 | ||
3dbcf3f6 | 3767 | /* Don't try to reuse the same piece of text twice. */ |
ec7adf26 | 3768 | overlap = same_at_start - BEGV_BYTE - (same_at_end + inserted - ZV_BYTE); |
3dbcf3f6 RS |
3769 | if (overlap > 0) |
3770 | same_at_end += overlap; | |
3771 | ||
727a0b4a RS |
3772 | /* If display currently starts at beginning of line, |
3773 | keep it that way. */ | |
3774 | if (XBUFFER (XWINDOW (selected_window)->buffer) == current_buffer) | |
3775 | XWINDOW (selected_window)->start_at_line_beg = Fbolp (); | |
3776 | ||
3dbcf3f6 RS |
3777 | /* Replace the chars that we need to replace, |
3778 | and update INSERTED to equal the number of bytes | |
db327c7e | 3779 | we are taking from the decoded string. */ |
4b70e2c9 | 3780 | inserted -= (ZV_BYTE - same_at_end) + (same_at_start - BEGV_BYTE); |
427f5aab | 3781 | |
643c73b9 | 3782 | if (same_at_end != same_at_start) |
427f5aab KH |
3783 | { |
3784 | del_range_byte (same_at_start, same_at_end, 0); | |
3785 | temp = GPT; | |
3786 | same_at_start = GPT_BYTE; | |
3787 | } | |
643c73b9 RS |
3788 | else |
3789 | { | |
643c73b9 | 3790 | temp = BYTE_TO_CHAR (same_at_start); |
643c73b9 | 3791 | } |
427f5aab KH |
3792 | /* Insert from the file at the proper position. */ |
3793 | SET_PT_BOTH (temp, same_at_start); | |
50342b35 KH |
3794 | same_at_start_charpos |
3795 | = buf_bytepos_to_charpos (XBUFFER (conversion_buffer), | |
7f5d2c72 SM |
3796 | same_at_start - BEGV_BYTE |
3797 | + BUF_BEG_BYTE (XBUFFER (conversion_buffer))); | |
50342b35 KH |
3798 | inserted_chars |
3799 | = (buf_bytepos_to_charpos (XBUFFER (conversion_buffer), | |
7f5d2c72 SM |
3800 | same_at_start + inserted - BEGV_BYTE |
3801 | + BUF_BEG_BYTE (XBUFFER (conversion_buffer))) | |
50342b35 | 3802 | - same_at_start_charpos); |
d07af40d KH |
3803 | /* This binding is to avoid ask-user-about-supersession-threat |
3804 | being called in insert_from_buffer (via in | |
3805 | prepare_to_modify_buffer). */ | |
3806 | specbind (intern ("buffer-file-name"), Qnil); | |
db327c7e | 3807 | insert_from_buffer (XBUFFER (conversion_buffer), |
50342b35 | 3808 | same_at_start_charpos, inserted_chars, 0); |
427f5aab KH |
3809 | /* Set `inserted' to the number of inserted characters. */ |
3810 | inserted = PT - temp; | |
77343e1d KH |
3811 | /* Set point before the inserted characters. */ |
3812 | SET_PT_BOTH (temp, same_at_start); | |
3dbcf3f6 | 3813 | |
db327c7e | 3814 | unbind_to (this_count, Qnil); |
3dbcf3f6 | 3815 | |
3dbcf3f6 | 3816 | goto handled; |
3d0387c0 RS |
3817 | } |
3818 | ||
d4b8687b RS |
3819 | if (! not_regular) |
3820 | { | |
3821 | register Lisp_Object temp; | |
7fded690 | 3822 | |
d4b8687b | 3823 | total = XINT (end) - XINT (beg); |
570d7624 | 3824 | |
d4b8687b RS |
3825 | /* Make sure point-max won't overflow after this insertion. */ |
3826 | XSETINT (temp, total); | |
3827 | if (total != XINT (temp)) | |
3828 | error ("Maximum buffer size exceeded"); | |
3829 | } | |
3830 | else | |
3831 | /* For a special file, all we can do is guess. */ | |
3832 | total = READ_BUF_SIZE; | |
570d7624 | 3833 | |
68780e2a RS |
3834 | if (NILP (visit) && inserted > 0) |
3835 | { | |
3836 | #ifdef CLASH_DETECTION | |
3837 | if (!NILP (current_buffer->file_truename) | |
3838 | /* Make binding buffer-file-name to nil effective. */ | |
3839 | && !NILP (current_buffer->filename) | |
3840 | && SAVE_MODIFF >= MODIFF) | |
3841 | we_locked_file = 1; | |
3842 | #endif /* CLASH_DETECTION */ | |
3843 | prepare_to_modify_buffer (GPT, GPT, NULL); | |
3844 | } | |
570d7624 | 3845 | |
7fe52289 | 3846 | move_gap (PT); |
7fded690 JB |
3847 | if (GAP_SIZE < total) |
3848 | make_gap (total - GAP_SIZE); | |
3849 | ||
a1d2b64a | 3850 | if (XINT (beg) != 0 || !NILP (replace)) |
7fded690 JB |
3851 | { |
3852 | if (lseek (fd, XINT (beg), 0) < 0) | |
b1d1b865 RS |
3853 | report_file_error ("Setting file position", |
3854 | Fcons (orig_filename, Qnil)); | |
7fded690 JB |
3855 | } |
3856 | ||
6fdaa9a0 | 3857 | /* In the following loop, HOW_MUCH contains the total bytes read so |
c8a6d68a KH |
3858 | far for a regular file, and not changed for a special file. But, |
3859 | before exiting the loop, it is set to a negative value if I/O | |
3860 | error occurs. */ | |
a1d2b64a | 3861 | how_much = 0; |
efdc16c9 | 3862 | |
6fdaa9a0 KH |
3863 | /* Total bytes inserted. */ |
3864 | inserted = 0; | |
efdc16c9 | 3865 | |
c8a6d68a | 3866 | /* Here, we don't do code conversion in the loop. It is done by |
db327c7e | 3867 | decode_coding_gap after all data are read into the buffer. */ |
1b978129 | 3868 | { |
ae19ba7c | 3869 | EMACS_INT gap_size = GAP_SIZE; |
efdc16c9 | 3870 | |
1b978129 GM |
3871 | while (how_much < total) |
3872 | { | |
5e570b75 | 3873 | /* try is reserved in some compilers (Microsoft C) */ |
ae19ba7c SM |
3874 | EMACS_INT trytry = min (total - how_much, READ_BUF_SIZE); |
3875 | EMACS_INT this; | |
570d7624 | 3876 | |
1b978129 GM |
3877 | if (not_regular) |
3878 | { | |
3879 | Lisp_Object val; | |
570d7624 | 3880 | |
1b978129 GM |
3881 | /* Maybe make more room. */ |
3882 | if (gap_size < trytry) | |
3883 | { | |
3884 | make_gap (total - gap_size); | |
3885 | gap_size = GAP_SIZE; | |
3886 | } | |
3887 | ||
3888 | /* Read from the file, capturing `quit'. When an | |
3889 | error occurs, end the loop, and arrange for a quit | |
3890 | to be signaled after decoding the text we read. */ | |
3891 | non_regular_fd = fd; | |
3892 | non_regular_inserted = inserted; | |
3893 | non_regular_nbytes = trytry; | |
3894 | val = internal_condition_case_1 (read_non_regular, Qnil, Qerror, | |
3895 | read_non_regular_quit); | |
3896 | if (NILP (val)) | |
3897 | { | |
3898 | read_quit = 1; | |
3899 | break; | |
3900 | } | |
3901 | ||
3902 | this = XINT (val); | |
3903 | } | |
3904 | else | |
3905 | { | |
3906 | /* Allow quitting out of the actual I/O. We don't make text | |
3907 | part of the buffer until all the reading is done, so a C-g | |
3908 | here doesn't do any harm. */ | |
3909 | immediate_quit = 1; | |
3910 | QUIT; | |
28c3eb5a | 3911 | this = emacs_read (fd, BEG_ADDR + PT_BYTE - BEG_BYTE + inserted, trytry); |
1b978129 GM |
3912 | immediate_quit = 0; |
3913 | } | |
efdc16c9 | 3914 | |
1b978129 GM |
3915 | if (this <= 0) |
3916 | { | |
3917 | how_much = this; | |
3918 | break; | |
3919 | } | |
3920 | ||
3921 | gap_size -= this; | |
3922 | ||
3923 | /* For a regular file, where TOTAL is the real size, | |
3924 | count HOW_MUCH to compare with it. | |
3925 | For a special file, where TOTAL is just a buffer size, | |
3926 | so don't bother counting in HOW_MUCH. | |
3927 | (INSERTED is where we count the number of characters inserted.) */ | |
3928 | if (! not_regular) | |
3929 | how_much += this; | |
3930 | inserted += this; | |
3931 | } | |
3932 | } | |
3933 | ||
68780e2a RS |
3934 | /* Now we have read all the file data into the gap. |
3935 | If it was empty, undo marking the buffer modified. */ | |
3936 | ||
3937 | if (inserted == 0) | |
3938 | { | |
6840d350 | 3939 | #ifdef CLASH_DETECTION |
68780e2a RS |
3940 | if (we_locked_file) |
3941 | unlock_file (current_buffer->file_truename); | |
6840d350 | 3942 | #endif |
68780e2a RS |
3943 | Vdeactivate_mark = old_Vdeactivate_mark; |
3944 | } | |
83c1cf6d RS |
3945 | else |
3946 | Vdeactivate_mark = Qt; | |
68780e2a | 3947 | |
1b978129 GM |
3948 | /* Make the text read part of the buffer. */ |
3949 | GAP_SIZE -= inserted; | |
3950 | GPT += inserted; | |
3951 | GPT_BYTE += inserted; | |
3952 | ZV += inserted; | |
3953 | ZV_BYTE += inserted; | |
3954 | Z += inserted; | |
3955 | Z_BYTE += inserted; | |
6fdaa9a0 | 3956 | |
c8a6d68a KH |
3957 | if (GAP_SIZE > 0) |
3958 | /* Put an anchor to ensure multi-byte form ends at gap. */ | |
3959 | *GPT_ADDR = 0; | |
d4b8687b | 3960 | |
68c45bf0 | 3961 | emacs_close (fd); |
6fdaa9a0 | 3962 | |
c8a6d68a KH |
3963 | /* Discard the unwind protect for closing the file. */ |
3964 | specpdl_ptr--; | |
6fdaa9a0 | 3965 | |
c8a6d68a KH |
3966 | if (how_much < 0) |
3967 | error ("IO error reading %s: %s", | |
d5db4077 | 3968 | SDATA (orig_filename), emacs_strerror (errno)); |
ec7adf26 | 3969 | |
f8569325 DL |
3970 | notfound: |
3971 | ||
db327c7e | 3972 | if (NILP (coding_system)) |
c8a6d68a | 3973 | { |
2df42e09 | 3974 | /* The coding system is not yet decided. Decide it by an |
dfe35e7b RS |
3975 | optimized method for handling `coding:' tag. |
3976 | ||
3977 | Note that we can get here only if the buffer was empty | |
3978 | before the insertion. */ | |
f736ffbf | 3979 | |
2df42e09 | 3980 | if (!NILP (Vcoding_system_for_read)) |
db327c7e | 3981 | coding_system = Vcoding_system_for_read; |
2df42e09 KH |
3982 | else |
3983 | { | |
98a7d268 KH |
3984 | /* Since we are sure that the current buffer was empty |
3985 | before the insertion, we can toggle | |
3986 | enable-multibyte-characters directly here without taking | |
9a7f80aa KH |
3987 | care of marker adjustment. By this way, we can run Lisp |
3988 | program safely before decoding the inserted text. */ | |
98a7d268 | 3989 | Lisp_Object unwind_data; |
9a7f80aa | 3990 | int count = SPECPDL_INDEX (); |
2df42e09 | 3991 | |
98a7d268 KH |
3992 | unwind_data = Fcons (current_buffer->enable_multibyte_characters, |
3993 | Fcons (current_buffer->undo_list, | |
3994 | Fcurrent_buffer ())); | |
2b89769e | 3995 | current_buffer->enable_multibyte_characters = Qnil; |
98a7d268 KH |
3996 | current_buffer->undo_list = Qt; |
3997 | record_unwind_protect (decide_coding_unwind, unwind_data); | |
3998 | ||
3999 | if (inserted > 0 && ! NILP (Vset_auto_coding_function)) | |
4000 | { | |
db327c7e | 4001 | coding_system = call2 (Vset_auto_coding_function, |
8f924df7 | 4002 | filename, make_number (inserted)); |
2df42e09 | 4003 | } |
f736ffbf | 4004 | |
db327c7e | 4005 | if (NILP (coding_system)) |
2df42e09 KH |
4006 | { |
4007 | /* If the coding system is not yet decided, check | |
4008 | file-coding-system-alist. */ | |
8f924df7 | 4009 | Lisp_Object args[6]; |
f736ffbf | 4010 | |
2df42e09 KH |
4011 | args[0] = Qinsert_file_contents, args[1] = orig_filename; |
4012 | args[2] = visit, args[3] = beg, args[4] = end, args[5] = Qnil; | |
8f924df7 KH |
4013 | coding_system = Ffind_operation_coding_system (6, args); |
4014 | if (CONSP (coding_system)) | |
4015 | coding_system = XCAR (coding_system); | |
f736ffbf | 4016 | } |
98a7d268 KH |
4017 | unbind_to (count, Qnil); |
4018 | inserted = Z_BYTE - BEG_BYTE; | |
2df42e09 | 4019 | } |
f736ffbf | 4020 | |
db327c7e KH |
4021 | if (NILP (coding_system)) |
4022 | coding_system = Qundecided; | |
4023 | else | |
4024 | CHECK_CODING_SYSTEM (coding_system); | |
f736ffbf | 4025 | |
db327c7e | 4026 | if (NILP (current_buffer->enable_multibyte_characters)) |
237a6fd2 | 4027 | /* We must suppress all character code conversion except for |
2df42e09 | 4028 | end-of-line conversion. */ |
db327c7e | 4029 | coding_system = raw_text_coding_system (coding_system); |
db327c7e KH |
4030 | setup_coding_system (coding_system, &coding); |
4031 | /* Ensure we set Vlast_coding_system_used. */ | |
4032 | set_coding_system = 1; | |
2df42e09 | 4033 | } |
f736ffbf | 4034 | |
db327c7e | 4035 | if (!NILP (visit)) |
8c3b9441 | 4036 | { |
db327c7e | 4037 | /* When we visit a file by raw-text, we change the buffer to |
9a7f80aa | 4038 | unibyte. */ |
db327c7e KH |
4039 | if (CODING_FOR_UNIBYTE (&coding) |
4040 | /* Can't do this if part of the buffer might be preserved. */ | |
4041 | && NILP (replace)) | |
4042 | /* Visiting a file with these coding system makes the buffer | |
4043 | unibyte. */ | |
4044 | current_buffer->enable_multibyte_characters = Qnil; | |
8c3b9441 KH |
4045 | } |
4046 | ||
8f924df7 | 4047 | coding.dst_multibyte = ! NILP (current_buffer->enable_multibyte_characters); |
5b359650 | 4048 | if (CODING_MAY_REQUIRE_DECODING (&coding) |
1c157f8d | 4049 | && (inserted > 0 || CODING_REQUIRE_FLUSHING (&coding))) |
2df42e09 | 4050 | { |
db327c7e KH |
4051 | move_gap_both (PT, PT_BYTE); |
4052 | GAP_SIZE += inserted; | |
4053 | ZV_BYTE -= inserted; | |
4054 | Z_BYTE -= inserted; | |
4055 | ZV -= inserted; | |
4056 | Z -= inserted; | |
4057 | decode_coding_gap (&coding, inserted, inserted); | |
4058 | inserted = coding.produced_char; | |
5b359650 | 4059 | coding_system = CODING_ID_NAME (coding.id); |
2df42e09 | 4060 | } |
db327c7e KH |
4061 | else if (inserted > 0) |
4062 | adjust_after_insert (PT, PT_BYTE, PT + inserted, PT_BYTE + inserted, | |
4063 | inserted); | |
570d7624 | 4064 | |
cf6d2357 RS |
4065 | /* Now INSERTED is measured in characters. */ |
4066 | ||
04e6f79c | 4067 | #ifdef DOS_NT |
2df42e09 KH |
4068 | /* Use the conversion type to determine buffer-file-type |
4069 | (find-buffer-file-type is now used to help determine the | |
4070 | conversion). */ | |
652a7e95 | 4071 | if ((VECTORP (CODING_ID_EOL_TYPE (coding.id)) |
f7ce9c0c | 4072 | || EQ (CODING_ID_EOL_TYPE (coding.id), Qunix)) |
2df42e09 KH |
4073 | && ! CODING_REQUIRE_DECODING (&coding)) |
4074 | current_buffer->buffer_file_type = Qt; | |
4075 | else | |
4076 | current_buffer->buffer_file_type = Qnil; | |
04e6f79c | 4077 | #endif |
570d7624 | 4078 | |
32f4334d | 4079 | handled: |
570d7624 | 4080 | |
db65a627 CY |
4081 | if (deferred_remove_unwind_protect) |
4082 | /* If requested above, discard the unwind protect for closing the | |
4083 | file. */ | |
4084 | specpdl_ptr--; | |
4085 | ||
265a9e55 | 4086 | if (!NILP (visit)) |
570d7624 | 4087 | { |
18a9f8d9 | 4088 | if (!EQ (current_buffer->undo_list, Qt) && !nochange) |
cfadd376 | 4089 | current_buffer->undo_list = Qnil; |
62bcf009 | 4090 | |
a7e82472 RS |
4091 | if (NILP (handler)) |
4092 | { | |
4093 | current_buffer->modtime = st.st_mtime; | |
b1d1b865 | 4094 | current_buffer->filename = orig_filename; |
a7e82472 | 4095 | } |
62bcf009 | 4096 | |
95385625 | 4097 | SAVE_MODIFF = MODIFF; |
570d7624 | 4098 | current_buffer->auto_save_modified = MODIFF; |
2acfd7ae | 4099 | XSETFASTINT (current_buffer->save_length, Z - BEG); |
570d7624 | 4100 | #ifdef CLASH_DETECTION |
32f4334d RS |
4101 | if (NILP (handler)) |
4102 | { | |
f471f4c2 RS |
4103 | if (!NILP (current_buffer->file_truename)) |
4104 | unlock_file (current_buffer->file_truename); | |
32f4334d RS |
4105 | unlock_file (filename); |
4106 | } | |
570d7624 | 4107 | #endif /* CLASH_DETECTION */ |
330bfe57 | 4108 | if (not_regular) |
24b1ddad KS |
4109 | xsignal2 (Qfile_error, |
4110 | build_string ("not a regular file"), orig_filename); | |
570d7624 JB |
4111 | } |
4112 | ||
b6426b03 | 4113 | if (set_coding_system) |
8f924df7 | 4114 | Vlast_coding_system_used = coding_system; |
b6426b03 | 4115 | |
2080470e | 4116 | if (! NILP (Ffboundp (Qafter_insert_file_set_coding))) |
b6426b03 | 4117 | { |
37a3c774 KH |
4118 | insval = call2 (Qafter_insert_file_set_coding, make_number (inserted), |
4119 | visit); | |
b6426b03 KH |
4120 | if (! NILP (insval)) |
4121 | { | |
4122 | CHECK_NUMBER (insval); | |
4123 | inserted = XFASTINT (insval); | |
4124 | } | |
4125 | } | |
4126 | ||
6420e80c | 4127 | /* Decode file format. */ |
c8a6d68a | 4128 | if (inserted > 0) |
0d420e88 | 4129 | { |
6420e80c | 4130 | /* Don't run point motion or modification hooks when decoding. */ |
6f2528d8 | 4131 | int count = SPECPDL_INDEX (); |
ae19ba7c | 4132 | EMACS_INT old_inserted = inserted; |
6f2528d8 MR |
4133 | specbind (Qinhibit_point_motion_hooks, Qt); |
4134 | specbind (Qinhibit_modification_hooks, Qt); | |
4135 | ||
6420e80c | 4136 | /* Save old undo list and don't record undo for decoding. */ |
6f2528d8 MR |
4137 | old_undo = current_buffer->undo_list; |
4138 | current_buffer->undo_list = Qt; | |
efdc16c9 | 4139 | |
6f2528d8 | 4140 | if (NILP (replace)) |
ed8e506f | 4141 | { |
6f2528d8 MR |
4142 | insval = call3 (Qformat_decode, |
4143 | Qnil, make_number (inserted), visit); | |
4144 | CHECK_NUMBER (insval); | |
4145 | inserted = XFASTINT (insval); | |
4146 | } | |
4147 | else | |
4148 | { | |
4149 | /* If REPLACE is non-nil and we succeeded in not replacing the | |
6420e80c AS |
4150 | beginning or end of the buffer text with the file's contents, |
4151 | call format-decode with `point' positioned at the beginning | |
4152 | of the buffer and `inserted' equalling the number of | |
4153 | characters in the buffer. Otherwise, format-decode might | |
4154 | fail to correctly analyze the beginning or end of the buffer. | |
4155 | Hence we temporarily save `point' and `inserted' here and | |
4156 | restore `point' iff format-decode did not insert or delete | |
4157 | any text. Otherwise we leave `point' at point-min. */ | |
ae19ba7c SM |
4158 | EMACS_INT opoint = PT; |
4159 | EMACS_INT opoint_byte = PT_BYTE; | |
4160 | EMACS_INT oinserted = ZV - BEGV; | |
cac4219c | 4161 | int ochars_modiff = CHARS_MODIFF; |
1f163f28 MA |
4162 | |
4163 | TEMP_SET_PT_BOTH (BEGV, BEGV_BYTE); | |
6f2528d8 MR |
4164 | insval = call3 (Qformat_decode, |
4165 | Qnil, make_number (oinserted), visit); | |
4166 | CHECK_NUMBER (insval); | |
cac4219c MR |
4167 | if (ochars_modiff == CHARS_MODIFF) |
4168 | /* format_decode didn't modify buffer's characters => move | |
4169 | point back to position before inserted text and leave | |
6420e80c | 4170 | value of inserted alone. */ |
6f2528d8 | 4171 | SET_PT_BOTH (opoint, opoint_byte); |
cac4219c MR |
4172 | else |
4173 | /* format_decode modified buffer's characters => consider | |
6420e80c | 4174 | entire buffer changed and leave point at point-min. */ |
cac4219c | 4175 | inserted = XFASTINT (insval); |
ed8e506f | 4176 | } |
efdc16c9 | 4177 | |
6f2528d8 | 4178 | /* For consistency with format-decode call these now iff inserted > 0 |
6420e80c | 4179 | (martin 2007-06-28). */ |
6f2528d8 MR |
4180 | p = Vafter_insert_file_functions; |
4181 | while (CONSP (p)) | |
4182 | { | |
4183 | if (NILP (replace)) | |
4184 | { | |
4185 | insval = call1 (XCAR (p), make_number (inserted)); | |
4186 | if (!NILP (insval)) | |
4187 | { | |
4188 | CHECK_NUMBER (insval); | |
4189 | inserted = XFASTINT (insval); | |
4190 | } | |
4191 | } | |
4192 | else | |
4193 | { | |
6420e80c AS |
4194 | /* For the rationale of this see the comment on |
4195 | format-decode above. */ | |
ae19ba7c SM |
4196 | EMACS_INT opoint = PT; |
4197 | EMACS_INT opoint_byte = PT_BYTE; | |
4198 | EMACS_INT oinserted = ZV - BEGV; | |
cac4219c | 4199 | int ochars_modiff = CHARS_MODIFF; |
1f163f28 | 4200 | |
6f2528d8 MR |
4201 | TEMP_SET_PT_BOTH (BEGV, BEGV_BYTE); |
4202 | insval = call1 (XCAR (p), make_number (oinserted)); | |
4203 | if (!NILP (insval)) | |
4204 | { | |
4205 | CHECK_NUMBER (insval); | |
cac4219c MR |
4206 | if (ochars_modiff == CHARS_MODIFF) |
4207 | /* after_insert_file_functions didn't modify | |
4208 | buffer's characters => move point back to | |
4209 | position before inserted text and leave value of | |
6420e80c | 4210 | inserted alone. */ |
6f2528d8 | 4211 | SET_PT_BOTH (opoint, opoint_byte); |
cac4219c MR |
4212 | else |
4213 | /* after_insert_file_functions did modify buffer's | |
4214 | characters => consider entire buffer changed and | |
6420e80c | 4215 | leave point at point-min. */ |
cac4219c | 4216 | inserted = XFASTINT (insval); |
6f2528d8 MR |
4217 | } |
4218 | } | |
4219 | ||
4220 | QUIT; | |
4221 | p = XCDR (p); | |
ed8e506f | 4222 | } |
efdc16c9 | 4223 | |
6f2528d8 MR |
4224 | if (NILP (visit)) |
4225 | { | |
6420e80c AS |
4226 | current_buffer->undo_list = old_undo; |
4227 | if (CONSP (old_undo) && inserted != old_inserted) | |
6f2528d8 | 4228 | { |
6420e80c AS |
4229 | /* Adjust the last undo record for the size change during |
4230 | the format conversion. */ | |
6f2528d8 | 4231 | Lisp_Object tem = XCAR (old_undo); |
6420e80c AS |
4232 | if (CONSP (tem) && INTEGERP (XCAR (tem)) |
4233 | && INTEGERP (XCDR (tem)) | |
4234 | && XFASTINT (XCDR (tem)) == PT + old_inserted) | |
4235 | XSETCDR (tem, make_number (PT + inserted)); | |
6f2528d8 MR |
4236 | } |
4237 | } | |
6f2528d8 | 4238 | else |
1bc99c9c | 4239 | /* If undo_list was Qt before, keep it that way. |
6420e80c | 4240 | Otherwise start with an empty undo_list. */ |
1bc99c9c | 4241 | current_buffer->undo_list = EQ (old_undo, Qt) ? Qt : Qnil; |
efdc16c9 | 4242 | |
6f2528d8 | 4243 | unbind_to (count, Qnil); |
0d420e88 BG |
4244 | } |
4245 | ||
0342d8c5 RS |
4246 | /* Call after-change hooks for the inserted text, aside from the case |
4247 | of normal visiting (not with REPLACE), which is done in a new buffer | |
4248 | "before" the buffer is changed. */ | |
c8a6d68a | 4249 | if (inserted > 0 && total > 0 |
0342d8c5 | 4250 | && (NILP (visit) || !NILP (replace))) |
ce51c54c KH |
4251 | { |
4252 | signal_after_change (PT, 0, inserted); | |
4253 | update_compositions (PT, PT, CHECK_BORDER); | |
4254 | } | |
b56567b5 | 4255 | |
f8569325 DL |
4256 | if (!NILP (visit) |
4257 | && current_buffer->modtime == -1) | |
4258 | { | |
4259 | /* If visiting nonexistent file, return nil. */ | |
4260 | report_file_error ("Opening input file", Fcons (orig_filename, Qnil)); | |
d6a3cc15 RS |
4261 | } |
4262 | ||
1b978129 GM |
4263 | if (read_quit) |
4264 | Fsignal (Qquit, Qnil); | |
4265 | ||
ec7adf26 | 4266 | /* ??? Retval needs to be dealt with in all cases consistently. */ |
a1d2b64a | 4267 | if (NILP (val)) |
b1d1b865 | 4268 | val = Fcons (orig_filename, |
a1d2b64a RS |
4269 | Fcons (make_number (inserted), |
4270 | Qnil)); | |
4271 | ||
4272 | RETURN_UNGCPRO (unbind_to (count, val)); | |
570d7624 | 4273 | } |
7fded690 | 4274 | \f |
236a12f2 | 4275 | static Lisp_Object build_annotations P_ ((Lisp_Object, Lisp_Object)); |
d6a3cc15 | 4276 | |
199607e4 | 4277 | static Lisp_Object |
67fbc0cb CY |
4278 | build_annotations_unwind (arg) |
4279 | Lisp_Object arg; | |
6fc6f94b | 4280 | { |
67fbc0cb | 4281 | Vwrite_region_annotation_buffers = arg; |
6fc6f94b RS |
4282 | return Qnil; |
4283 | } | |
4284 | ||
7c82a4a9 SM |
4285 | /* Decide the coding-system to encode the data with. */ |
4286 | ||
c934586d | 4287 | static Lisp_Object |
7c82a4a9 SM |
4288 | choose_write_coding_system (start, end, filename, |
4289 | append, visit, lockname, coding) | |
4290 | Lisp_Object start, end, filename, append, visit, lockname; | |
4291 | struct coding_system *coding; | |
4292 | { | |
4293 | Lisp_Object val; | |
75421805 | 4294 | Lisp_Object eol_parent = Qnil; |
7c82a4a9 | 4295 | |
6b61353c KH |
4296 | if (auto_saving |
4297 | && NILP (Fstring_equal (current_buffer->filename, | |
4298 | current_buffer->auto_save_file_name))) | |
75421805 KH |
4299 | { |
4300 | val = Qutf_8_emacs; | |
4301 | eol_parent = Qunix; | |
4302 | } | |
7c82a4a9 | 4303 | else if (!NILP (Vcoding_system_for_write)) |
42b01e1e KH |
4304 | { |
4305 | val = Vcoding_system_for_write; | |
4306 | if (coding_system_require_warning | |
4307 | && !NILP (Ffboundp (Vselect_safe_coding_system_function))) | |
4308 | /* Confirm that VAL can surely encode the current region. */ | |
4309 | val = call5 (Vselect_safe_coding_system_function, | |
4310 | start, end, Fcons (Qt, Fcons (val, Qnil)), | |
4311 | Qnil, filename); | |
4312 | } | |
7c82a4a9 SM |
4313 | else |
4314 | { | |
4315 | /* If the variable `buffer-file-coding-system' is set locally, | |
4316 | it means that the file was read with some kind of code | |
4317 | conversion or the variable is explicitly set by users. We | |
4318 | had better write it out with the same coding system even if | |
4319 | `enable-multibyte-characters' is nil. | |
4320 | ||
4321 | If it is not set locally, we anyway have to convert EOL | |
4322 | format if the default value of `buffer-file-coding-system' | |
4323 | tells that it is not Unix-like (LF only) format. */ | |
4324 | int using_default_coding = 0; | |
4325 | int force_raw_text = 0; | |
4326 | ||
4327 | val = current_buffer->buffer_file_coding_system; | |
4328 | if (NILP (val) | |
4329 | || NILP (Flocal_variable_p (Qbuffer_file_coding_system, Qnil))) | |
4330 | { | |
4331 | val = Qnil; | |
4332 | if (NILP (current_buffer->enable_multibyte_characters)) | |
4333 | force_raw_text = 1; | |
4334 | } | |
efdc16c9 | 4335 | |
7c82a4a9 SM |
4336 | if (NILP (val)) |
4337 | { | |
4338 | /* Check file-coding-system-alist. */ | |
4339 | Lisp_Object args[7], coding_systems; | |
4340 | ||
4341 | args[0] = Qwrite_region; args[1] = start; args[2] = end; | |
4342 | args[3] = filename; args[4] = append; args[5] = visit; | |
4343 | args[6] = lockname; | |
4344 | coding_systems = Ffind_operation_coding_system (7, args); | |
4345 | if (CONSP (coding_systems) && !NILP (XCDR (coding_systems))) | |
4346 | val = XCDR (coding_systems); | |
4347 | } | |
4348 | ||
c934586d | 4349 | if (NILP (val)) |
7c82a4a9 SM |
4350 | { |
4351 | /* If we still have not decided a coding system, use the | |
4352 | default value of buffer-file-coding-system. */ | |
4353 | val = current_buffer->buffer_file_coding_system; | |
4354 | using_default_coding = 1; | |
4355 | } | |
efdc16c9 | 4356 | |
db327c7e KH |
4357 | if (! NILP (val) && ! force_raw_text) |
4358 | { | |
4359 | Lisp_Object spec, attrs; | |
4360 | ||
4361 | CHECK_CODING_SYSTEM_GET_SPEC (val, spec); | |
4362 | attrs = AREF (spec, 0); | |
4363 | if (EQ (CODING_ATTR_TYPE (attrs), Qraw_text)) | |
4364 | force_raw_text = 1; | |
4365 | } | |
4366 | ||
7c82a4a9 SM |
4367 | if (!force_raw_text |
4368 | && !NILP (Ffboundp (Vselect_safe_coding_system_function))) | |
4369 | /* Confirm that VAL can surely encode the current region. */ | |
905a4276 PJ |
4370 | val = call5 (Vselect_safe_coding_system_function, |
4371 | start, end, val, Qnil, filename); | |
7c82a4a9 | 4372 | |
db327c7e KH |
4373 | /* If the decided coding-system doesn't specify end-of-line |
4374 | format, we use that of | |
4375 | `default-buffer-file-coding-system'. */ | |
c934586d KH |
4376 | if (! using_default_coding |
4377 | && ! NILP (buffer_defaults.buffer_file_coding_system)) | |
db327c7e KH |
4378 | val = (coding_inherit_eol_type |
4379 | (val, buffer_defaults.buffer_file_coding_system)); | |
7c82a4a9 | 4380 | |
db327c7e KH |
4381 | /* If we decide not to encode text, use `raw-text' or one of its |
4382 | subsidiaries. */ | |
7c82a4a9 | 4383 | if (force_raw_text) |
db327c7e | 4384 | val = raw_text_coding_system (val); |
7c82a4a9 SM |
4385 | } |
4386 | ||
75421805 | 4387 | val = coding_inherit_eol_type (val, eol_parent); |
c934586d | 4388 | setup_coding_system (val, coding); |
7c82a4a9 | 4389 | |
7c82a4a9 SM |
4390 | if (!STRINGP (start) && !NILP (current_buffer->selective_display)) |
4391 | coding->mode |= CODING_MODE_SELECTIVE_DISPLAY; | |
c934586d | 4392 | return val; |
7c82a4a9 SM |
4393 | } |
4394 | ||
de1d0127 | 4395 | DEFUN ("write-region", Fwrite_region, Swrite_region, 3, 7, |
8c1a1077 PJ |
4396 | "r\nFWrite region to file: \ni\ni\ni\np", |
4397 | doc: /* Write current region into specified file. | |
c2efea25 RS |
4398 | When called from a program, requires three arguments: |
4399 | START, END and FILENAME. START and END are normally buffer positions | |
4400 | specifying the part of the buffer to write. | |
4401 | If START is nil, that means to use the entire buffer contents. | |
4402 | If START is a string, then output that string to the file | |
4403 | instead of any buffer contents; END is ignored. | |
4404 | ||
8c1a1077 PJ |
4405 | Optional fourth argument APPEND if non-nil means |
4406 | append to existing file contents (if any). If it is an integer, | |
4407 | seek to that offset in the file before writing. | |
36e50520 | 4408 | Optional fifth argument VISIT, if t or a string, means |
8c1a1077 PJ |
4409 | set the last-save-file-modtime of buffer to this file's modtime |
4410 | and mark buffer not modified. | |
4411 | If VISIT is a string, it is a second file name; | |
4412 | the output goes to FILENAME, but the buffer is marked as visiting VISIT. | |
4413 | VISIT is also the file name to lock and unlock for clash detection. | |
4414 | If VISIT is neither t nor nil nor a string, | |
5f4e6aa9 | 4415 | that means do not display the \"Wrote file\" message. |
8c1a1077 PJ |
4416 | The optional sixth arg LOCKNAME, if non-nil, specifies the name to |
4417 | use for locking and unlocking, overriding FILENAME and VISIT. | |
4418 | The optional seventh arg MUSTBENEW, if non-nil, insists on a check | |
4419 | for an existing file with the same name. If MUSTBENEW is `excl', | |
4420 | that means to get an error if the file already exists; never overwrite. | |
4421 | If MUSTBENEW is neither nil nor `excl', that means ask for | |
4422 | confirmation before overwriting, but do go ahead and overwrite the file | |
4423 | if the user confirms. | |
8c1a1077 PJ |
4424 | |
4425 | This does code conversion according to the value of | |
4426 | `coding-system-for-write', `buffer-file-coding-system', or | |
4427 | `file-coding-system-alist', and sets the variable | |
aacd8ba1 GM |
4428 | `last-coding-system-used' to the coding system actually used. |
4429 | ||
4430 | This calls `write-region-annotate-functions' at the start, and | |
4431 | `write-region-post-annotation-function' at the end. */) | |
8c1a1077 | 4432 | (start, end, filename, append, visit, lockname, mustbenew) |
f7b4065f | 4433 | Lisp_Object start, end, filename, append, visit, lockname, mustbenew; |
570d7624 JB |
4434 | { |
4435 | register int desc; | |
4436 | int failure; | |
6bbd7a29 | 4437 | int save_errno = 0; |
19290c65 | 4438 | const unsigned char *fn; |
570d7624 | 4439 | struct stat st; |
aed13378 | 4440 | int count = SPECPDL_INDEX (); |
6fc6f94b | 4441 | int count1; |
3eac9910 | 4442 | Lisp_Object handler; |
4ad827c5 | 4443 | Lisp_Object visit_file; |
65b7d3e7 | 4444 | Lisp_Object annotations; |
b1d1b865 | 4445 | Lisp_Object encoded_filename; |
d3a67486 SM |
4446 | int visiting = (EQ (visit, Qt) || STRINGP (visit)); |
4447 | int quietly = !NILP (visit); | |
7204a979 | 4448 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4, gcpro5; |
6fc6f94b | 4449 | struct buffer *given_buffer; |
5e570b75 | 4450 | #ifdef DOS_NT |
fa228724 | 4451 | int buffer_file_type = O_BINARY; |
5e570b75 | 4452 | #endif /* DOS_NT */ |
6fdaa9a0 | 4453 | struct coding_system coding; |
570d7624 | 4454 | |
d3a67486 | 4455 | if (current_buffer->base_buffer && visiting) |
95385625 RS |
4456 | error ("Cannot do file visiting in an indirect buffer"); |
4457 | ||
561cb8e1 | 4458 | if (!NILP (start) && !STRINGP (start)) |
570d7624 JB |
4459 | validate_region (&start, &end); |
4460 | ||
95c1c901 | 4461 | visit_file = Qnil; |
59fac292 | 4462 | GCPRO5 (start, filename, visit, visit_file, lockname); |
b56567b5 | 4463 | |
570d7624 | 4464 | filename = Fexpand_file_name (filename, Qnil); |
de1d0127 | 4465 | |
236a12f2 | 4466 | if (!NILP (mustbenew) && !EQ (mustbenew, Qexcl)) |
b8b29dc9 | 4467 | barf_or_query_if_file_exists (filename, "overwrite", 1, 0, 1); |
de1d0127 | 4468 | |
561cb8e1 | 4469 | if (STRINGP (visit)) |
e5176bae | 4470 | visit_file = Fexpand_file_name (visit, Qnil); |
4ad827c5 RS |
4471 | else |
4472 | visit_file = filename; | |
4473 | ||
7204a979 RS |
4474 | if (NILP (lockname)) |
4475 | lockname = visit_file; | |
4476 | ||
65b7d3e7 RS |
4477 | annotations = Qnil; |
4478 | ||
32f4334d RS |
4479 | /* If the file name has special constructs in it, |
4480 | call the corresponding file handler. */ | |
49307295 | 4481 | handler = Ffind_file_name_handler (filename, Qwrite_region); |
b56ad927 | 4482 | /* If FILENAME has no handler, see if VISIT has one. */ |
93c30b5f | 4483 | if (NILP (handler) && STRINGP (visit)) |
199607e4 | 4484 | handler = Ffind_file_name_handler (visit, Qwrite_region); |
3eac9910 | 4485 | |
32f4334d RS |
4486 | if (!NILP (handler)) |
4487 | { | |
32f4334d | 4488 | Lisp_Object val; |
51cf6d37 RS |
4489 | val = call6 (handler, Qwrite_region, start, end, |
4490 | filename, append, visit); | |
32f4334d | 4491 | |
d6a3cc15 | 4492 | if (visiting) |
32f4334d | 4493 | { |
95385625 | 4494 | SAVE_MODIFF = MODIFF; |
2acfd7ae | 4495 | XSETFASTINT (current_buffer->save_length, Z - BEG); |
3b7792ed | 4496 | current_buffer->filename = visit_file; |
32f4334d | 4497 | } |
09121adc | 4498 | UNGCPRO; |
32f4334d RS |
4499 | return val; |
4500 | } | |
4501 | ||
4a38de71 KH |
4502 | record_unwind_protect (save_restriction_restore, save_restriction_save ()); |
4503 | ||
561cb8e1 RS |
4504 | /* Special kludge to simplify auto-saving. */ |
4505 | if (NILP (start)) | |
4506 | { | |
6b3d752c SM |
4507 | /* Do it later, so write-region-annotate-function can work differently |
4508 | if we save "the buffer" vs "a region". | |
4509 | This is useful in tar-mode. --Stef | |
2acfd7ae | 4510 | XSETFASTINT (start, BEG); |
6b3d752c | 4511 | XSETFASTINT (end, Z); */ |
4a38de71 | 4512 | Fwiden (); |
561cb8e1 RS |
4513 | } |
4514 | ||
67fbc0cb CY |
4515 | record_unwind_protect (build_annotations_unwind, |
4516 | Vwrite_region_annotation_buffers); | |
4517 | Vwrite_region_annotation_buffers = Fcons (Fcurrent_buffer (), Qnil); | |
aed13378 | 4518 | count1 = SPECPDL_INDEX (); |
6fc6f94b RS |
4519 | |
4520 | given_buffer = current_buffer; | |
bf3428a1 RS |
4521 | |
4522 | if (!STRINGP (start)) | |
236a12f2 | 4523 | { |
bf3428a1 RS |
4524 | annotations = build_annotations (start, end); |
4525 | ||
4526 | if (current_buffer != given_buffer) | |
4527 | { | |
4528 | XSETFASTINT (start, BEGV); | |
4529 | XSETFASTINT (end, ZV); | |
4530 | } | |
236a12f2 SM |
4531 | } |
4532 | ||
6b3d752c SM |
4533 | if (NILP (start)) |
4534 | { | |
4535 | XSETFASTINT (start, BEGV); | |
4536 | XSETFASTINT (end, ZV); | |
4537 | } | |
4538 | ||
236a12f2 SM |
4539 | UNGCPRO; |
4540 | ||
4541 | GCPRO5 (start, filename, annotations, visit_file, lockname); | |
4542 | ||
59fac292 SM |
4543 | /* Decide the coding-system to encode the data with. |
4544 | We used to make this choice before calling build_annotations, but that | |
4545 | leads to problems when a write-annotate-function takes care of | |
4546 | unsavable chars (as was the case with X-Symbol). */ | |
c934586d KH |
4547 | Vlast_coding_system_used |
4548 | = choose_write_coding_system (start, end, filename, | |
4549 | append, visit, lockname, &coding); | |
d6a3cc15 | 4550 | |
570d7624 JB |
4551 | #ifdef CLASH_DETECTION |
4552 | if (!auto_saving) | |
67fbc0cb | 4553 | lock_file (lockname); |
570d7624 JB |
4554 | #endif /* CLASH_DETECTION */ |
4555 | ||
b1d1b865 RS |
4556 | encoded_filename = ENCODE_FILE (filename); |
4557 | ||
d5db4077 | 4558 | fn = SDATA (encoded_filename); |
570d7624 | 4559 | desc = -1; |
265a9e55 | 4560 | if (!NILP (append)) |
5e570b75 | 4561 | #ifdef DOS_NT |
68c45bf0 | 4562 | desc = emacs_open (fn, O_WRONLY | buffer_file_type, 0); |
5e570b75 | 4563 | #else /* not DOS_NT */ |
68c45bf0 | 4564 | desc = emacs_open (fn, O_WRONLY, 0); |
5e570b75 | 4565 | #endif /* not DOS_NT */ |
570d7624 | 4566 | |
b1d1b865 | 4567 | if (desc < 0 && (NILP (append) || errno == ENOENT)) |
5e570b75 | 4568 | #ifdef DOS_NT |
68c45bf0 | 4569 | desc = emacs_open (fn, |
95522746 GM |
4570 | O_WRONLY | O_CREAT | buffer_file_type |
4571 | | (EQ (mustbenew, Qexcl) ? O_EXCL : O_TRUNC), | |
68c45bf0 | 4572 | S_IREAD | S_IWRITE); |
5e570b75 | 4573 | #else /* not DOS_NT */ |
68c45bf0 | 4574 | desc = emacs_open (fn, O_WRONLY | O_TRUNC | O_CREAT |
7c752c80 | 4575 | | (EQ (mustbenew, Qexcl) ? O_EXCL : 0), |
68c45bf0 | 4576 | auto_saving ? auto_save_mode_bits : 0666); |
5e570b75 | 4577 | #endif /* not DOS_NT */ |
570d7624 JB |
4578 | |
4579 | if (desc < 0) | |
4580 | { | |
4581 | #ifdef CLASH_DETECTION | |
4582 | save_errno = errno; | |
7204a979 | 4583 | if (!auto_saving) unlock_file (lockname); |
570d7624 JB |
4584 | errno = save_errno; |
4585 | #endif /* CLASH_DETECTION */ | |
43fb7d9a | 4586 | UNGCPRO; |
570d7624 JB |
4587 | report_file_error ("Opening output file", Fcons (filename, Qnil)); |
4588 | } | |
4589 | ||
4590 | record_unwind_protect (close_file_unwind, make_number (desc)); | |
4591 | ||
c1c4693e | 4592 | if (!NILP (append) && !NILP (Ffile_regular_p (filename))) |
43fb7d9a DL |
4593 | { |
4594 | long ret; | |
efdc16c9 | 4595 | |
43fb7d9a DL |
4596 | if (NUMBERP (append)) |
4597 | ret = lseek (desc, XINT (append), 1); | |
4598 | else | |
4599 | ret = lseek (desc, 0, 2); | |
4600 | if (ret < 0) | |
4601 | { | |
570d7624 | 4602 | #ifdef CLASH_DETECTION |
43fb7d9a | 4603 | if (!auto_saving) unlock_file (lockname); |
570d7624 | 4604 | #endif /* CLASH_DETECTION */ |
43fb7d9a DL |
4605 | UNGCPRO; |
4606 | report_file_error ("Lseek error", Fcons (filename, Qnil)); | |
4607 | } | |
4608 | } | |
efdc16c9 | 4609 | |
43fb7d9a | 4610 | UNGCPRO; |
570d7624 | 4611 | |
570d7624 JB |
4612 | failure = 0; |
4613 | immediate_quit = 1; | |
4614 | ||
561cb8e1 | 4615 | if (STRINGP (start)) |
570d7624 | 4616 | { |
d5db4077 | 4617 | failure = 0 > a_write (desc, start, 0, SCHARS (start), |
ce51c54c | 4618 | &annotations, &coding); |
570d7624 JB |
4619 | save_errno = errno; |
4620 | } | |
4621 | else if (XINT (start) != XINT (end)) | |
4622 | { | |
db327c7e KH |
4623 | failure = 0 > a_write (desc, Qnil, |
4624 | XINT (start), XINT (end) - XINT (start), | |
4625 | &annotations, &coding); | |
4626 | save_errno = errno; | |
69f6e679 RS |
4627 | } |
4628 | else | |
4629 | { | |
4630 | /* If file was empty, still need to write the annotations */ | |
c8a6d68a | 4631 | coding.mode |= CODING_MODE_LAST_BLOCK; |
ce51c54c | 4632 | failure = 0 > a_write (desc, Qnil, XINT (end), 0, &annotations, &coding); |
6fdaa9a0 KH |
4633 | save_errno = errno; |
4634 | } | |
4635 | ||
c8a6d68a KH |
4636 | if (CODING_REQUIRE_FLUSHING (&coding) |
4637 | && !(coding.mode & CODING_MODE_LAST_BLOCK) | |
1354debd | 4638 | && ! failure) |
6fdaa9a0 KH |
4639 | { |
4640 | /* We have to flush out a data. */ | |
c8a6d68a | 4641 | coding.mode |= CODING_MODE_LAST_BLOCK; |
db327c7e | 4642 | failure = 0 > e_write (desc, Qnil, 1, 1, &coding); |
69f6e679 | 4643 | save_errno = errno; |
570d7624 JB |
4644 | } |
4645 | ||
4646 | immediate_quit = 0; | |
4647 | ||
6e23c83e | 4648 | #ifdef HAVE_FSYNC |
570d7624 JB |
4649 | /* Note fsync appears to change the modtime on BSD4.2 (both vax and sun). |
4650 | Disk full in NFS may be reported here. */ | |
1daffa1c RS |
4651 | /* mib says that closing the file will try to write as fast as NFS can do |
4652 | it, and that means the fsync here is not crucial for autosave files. */ | |
ccf61795 | 4653 | if (!auto_saving && !write_region_inhibit_fsync && fsync (desc) < 0) |
cb33c142 | 4654 | { |
6cff77fd AS |
4655 | /* If fsync fails with EINTR, don't treat that as serious. Also |
4656 | ignore EINVAL which happens when fsync is not supported on this | |
4657 | file. */ | |
4658 | if (errno != EINTR && errno != EINVAL) | |
cb33c142 KH |
4659 | failure = 1, save_errno = errno; |
4660 | } | |
570d7624 JB |
4661 | #endif |
4662 | ||
570d7624 | 4663 | /* NFS can report a write failure now. */ |
68c45bf0 | 4664 | if (emacs_close (desc) < 0) |
570d7624 JB |
4665 | failure = 1, save_errno = errno; |
4666 | ||
570d7624 | 4667 | stat (fn, &st); |
67fbc0cb | 4668 | |
6fc6f94b RS |
4669 | /* Discard the unwind protect for close_file_unwind. */ |
4670 | specpdl_ptr = specpdl + count1; | |
67fbc0cb CY |
4671 | |
4672 | /* Call write-region-post-annotation-function. */ | |
294fa707 | 4673 | while (CONSP (Vwrite_region_annotation_buffers)) |
67fbc0cb CY |
4674 | { |
4675 | Lisp_Object buf = XCAR (Vwrite_region_annotation_buffers); | |
4676 | if (!NILP (Fbuffer_live_p (buf))) | |
4677 | { | |
4678 | Fset_buffer (buf); | |
4679 | if (FUNCTIONP (Vwrite_region_post_annotation_function)) | |
4680 | call0 (Vwrite_region_post_annotation_function); | |
4681 | } | |
4682 | Vwrite_region_annotation_buffers | |
4683 | = XCDR (Vwrite_region_annotation_buffers); | |
4684 | } | |
4685 | ||
4686 | unbind_to (count, Qnil); | |
570d7624 JB |
4687 | |
4688 | #ifdef CLASH_DETECTION | |
4689 | if (!auto_saving) | |
7204a979 | 4690 | unlock_file (lockname); |
570d7624 JB |
4691 | #endif /* CLASH_DETECTION */ |
4692 | ||
4693 | /* Do this before reporting IO error | |
4694 | to avoid a "file has changed on disk" warning on | |
4695 | next attempt to save. */ | |
d6a3cc15 | 4696 | if (visiting) |
570d7624 JB |
4697 | current_buffer->modtime = st.st_mtime; |
4698 | ||
4699 | if (failure) | |
d5db4077 | 4700 | error ("IO error writing %s: %s", SDATA (filename), |
68c45bf0 | 4701 | emacs_strerror (save_errno)); |
570d7624 | 4702 | |
d6a3cc15 | 4703 | if (visiting) |
570d7624 | 4704 | { |
95385625 | 4705 | SAVE_MODIFF = MODIFF; |
2acfd7ae | 4706 | XSETFASTINT (current_buffer->save_length, Z - BEG); |
3b7792ed | 4707 | current_buffer->filename = visit_file; |
f4226e89 | 4708 | update_mode_lines++; |
570d7624 | 4709 | } |
d6a3cc15 | 4710 | else if (quietly) |
6b61353c KH |
4711 | { |
4712 | if (auto_saving | |
4713 | && ! NILP (Fstring_equal (current_buffer->filename, | |
4714 | current_buffer->auto_save_file_name))) | |
4715 | SAVE_MODIFF = MODIFF; | |
4716 | ||
4717 | return Qnil; | |
4718 | } | |
570d7624 JB |
4719 | |
4720 | if (!auto_saving) | |
6b61353c | 4721 | message_with_string ((INTEGERP (append) |
0c328a0e RS |
4722 | ? "Updated %s" |
4723 | : ! NILP (append) | |
4724 | ? "Added to %s" | |
4725 | : "Wrote %s"), | |
4726 | visit_file, 1); | |
570d7624 JB |
4727 | |
4728 | return Qnil; | |
4729 | } | |
ec7adf26 | 4730 | \f |
d6a3cc15 RS |
4731 | Lisp_Object merge (); |
4732 | ||
4733 | DEFUN ("car-less-than-car", Fcar_less_than_car, Scar_less_than_car, 2, 2, 0, | |
8c1a1077 PJ |
4734 | doc: /* Return t if (car A) is numerically less than (car B). */) |
4735 | (a, b) | |
d6a3cc15 RS |
4736 | Lisp_Object a, b; |
4737 | { | |
4738 | return Flss (Fcar (a), Fcar (b)); | |
4739 | } | |
4740 | ||
4741 | /* Build the complete list of annotations appropriate for writing out | |
4742 | the text between START and END, by calling all the functions in | |
6fc6f94b RS |
4743 | write-region-annotate-functions and merging the lists they return. |
4744 | If one of these functions switches to a different buffer, we assume | |
4745 | that buffer contains altered text. Therefore, the caller must | |
4746 | make sure to restore the current buffer in all cases, | |
4747 | as save-excursion would do. */ | |
d6a3cc15 RS |
4748 | |
4749 | static Lisp_Object | |
236a12f2 SM |
4750 | build_annotations (start, end) |
4751 | Lisp_Object start, end; | |
d6a3cc15 RS |
4752 | { |
4753 | Lisp_Object annotations; | |
4754 | Lisp_Object p, res; | |
4755 | struct gcpro gcpro1, gcpro2; | |
0a20b684 | 4756 | Lisp_Object original_buffer; |
bd235610 | 4757 | int i, used_global = 0; |
0a20b684 RS |
4758 | |
4759 | XSETBUFFER (original_buffer, current_buffer); | |
d6a3cc15 RS |
4760 | |
4761 | annotations = Qnil; | |
4762 | p = Vwrite_region_annotate_functions; | |
4763 | GCPRO2 (annotations, p); | |
28c3eb5a | 4764 | while (CONSP (p)) |
d6a3cc15 | 4765 | { |
6fc6f94b | 4766 | struct buffer *given_buffer = current_buffer; |
bd235610 SM |
4767 | if (EQ (Qt, XCAR (p)) && !used_global) |
4768 | { /* Use the global value of the hook. */ | |
4769 | Lisp_Object arg[2]; | |
4770 | used_global = 1; | |
4771 | arg[0] = Fdefault_value (Qwrite_region_annotate_functions); | |
4772 | arg[1] = XCDR (p); | |
4773 | p = Fappend (2, arg); | |
4774 | continue; | |
4775 | } | |
6fc6f94b | 4776 | Vwrite_region_annotations_so_far = annotations; |
28c3eb5a | 4777 | res = call2 (XCAR (p), start, end); |
6fc6f94b RS |
4778 | /* If the function makes a different buffer current, |
4779 | assume that means this buffer contains altered text to be output. | |
4780 | Reset START and END from the buffer bounds | |
4781 | and discard all previous annotations because they should have | |
4782 | been dealt with by this function. */ | |
4783 | if (current_buffer != given_buffer) | |
4784 | { | |
67fbc0cb CY |
4785 | Vwrite_region_annotation_buffers |
4786 | = Fcons (Fcurrent_buffer (), | |
4787 | Vwrite_region_annotation_buffers); | |
3cf29f61 RS |
4788 | XSETFASTINT (start, BEGV); |
4789 | XSETFASTINT (end, ZV); | |
6fc6f94b RS |
4790 | annotations = Qnil; |
4791 | } | |
d6a3cc15 RS |
4792 | Flength (res); /* Check basic validity of return value */ |
4793 | annotations = merge (annotations, res, Qcar_less_than_car); | |
28c3eb5a | 4794 | p = XCDR (p); |
d6a3cc15 | 4795 | } |
0d420e88 BG |
4796 | |
4797 | /* Now do the same for annotation functions implied by the file-format */ | |
f844ba4e LT |
4798 | if (auto_saving && (!EQ (current_buffer->auto_save_file_format, Qt))) |
4799 | p = current_buffer->auto_save_file_format; | |
0d420e88 BG |
4800 | else |
4801 | p = current_buffer->file_format; | |
28c3eb5a | 4802 | for (i = 0; CONSP (p); p = XCDR (p), ++i) |
0d420e88 BG |
4803 | { |
4804 | struct buffer *given_buffer = current_buffer; | |
efdc16c9 | 4805 | |
0d420e88 | 4806 | Vwrite_region_annotations_so_far = annotations; |
532ed661 GM |
4807 | |
4808 | /* Value is either a list of annotations or nil if the function | |
4809 | has written annotations to a temporary buffer, which is now | |
4810 | current. */ | |
28c3eb5a | 4811 | res = call5 (Qformat_annotate_function, XCAR (p), start, end, |
532ed661 | 4812 | original_buffer, make_number (i)); |
0d420e88 BG |
4813 | if (current_buffer != given_buffer) |
4814 | { | |
3cf29f61 RS |
4815 | XSETFASTINT (start, BEGV); |
4816 | XSETFASTINT (end, ZV); | |
0d420e88 BG |
4817 | annotations = Qnil; |
4818 | } | |
efdc16c9 | 4819 | |
532ed661 GM |
4820 | if (CONSP (res)) |
4821 | annotations = merge (annotations, res, Qcar_less_than_car); | |
0d420e88 | 4822 | } |
6fdaa9a0 | 4823 | |
236a12f2 SM |
4824 | UNGCPRO; |
4825 | return annotations; | |
4826 | } | |
4827 | ||
ec7adf26 | 4828 | \f |
ce51c54c KH |
4829 | /* Write to descriptor DESC the NCHARS chars starting at POS of STRING. |
4830 | If STRING is nil, POS is the character position in the current buffer. | |
d6a3cc15 | 4831 | Intersperse with them the annotations from *ANNOT |
ce51c54c | 4832 | which fall within the range of POS to POS + NCHARS, |
d6a3cc15 RS |
4833 | each at its appropriate position. |
4834 | ||
ec7adf26 RS |
4835 | We modify *ANNOT by discarding elements as we use them up. |
4836 | ||
d6a3cc15 RS |
4837 | The return value is negative in case of system call failure. */ |
4838 | ||
ec7adf26 | 4839 | static int |
ce51c54c | 4840 | a_write (desc, string, pos, nchars, annot, coding) |
d6a3cc15 | 4841 | int desc; |
ce51c54c KH |
4842 | Lisp_Object string; |
4843 | register int nchars; | |
4844 | int pos; | |
d6a3cc15 | 4845 | Lisp_Object *annot; |
6fdaa9a0 | 4846 | struct coding_system *coding; |
d6a3cc15 RS |
4847 | { |
4848 | Lisp_Object tem; | |
4849 | int nextpos; | |
ce51c54c | 4850 | int lastpos = pos + nchars; |
d6a3cc15 | 4851 | |
eb15aa18 | 4852 | while (NILP (*annot) || CONSP (*annot)) |
d6a3cc15 RS |
4853 | { |
4854 | tem = Fcar_safe (Fcar (*annot)); | |
ce51c54c | 4855 | nextpos = pos - 1; |
ec7adf26 | 4856 | if (INTEGERP (tem)) |
ce51c54c | 4857 | nextpos = XFASTINT (tem); |
ec7adf26 RS |
4858 | |
4859 | /* If there are no more annotations in this range, | |
4860 | output the rest of the range all at once. */ | |
ce51c54c KH |
4861 | if (! (nextpos >= pos && nextpos <= lastpos)) |
4862 | return e_write (desc, string, pos, lastpos, coding); | |
ec7adf26 RS |
4863 | |
4864 | /* Output buffer text up to the next annotation's position. */ | |
ce51c54c | 4865 | if (nextpos > pos) |
d6a3cc15 | 4866 | { |
055a28c9 | 4867 | if (0 > e_write (desc, string, pos, nextpos, coding)) |
d6a3cc15 | 4868 | return -1; |
ce51c54c | 4869 | pos = nextpos; |
d6a3cc15 | 4870 | } |
ec7adf26 | 4871 | /* Output the annotation. */ |
d6a3cc15 RS |
4872 | tem = Fcdr (Fcar (*annot)); |
4873 | if (STRINGP (tem)) | |
4874 | { | |
d5db4077 | 4875 | if (0 > e_write (desc, tem, 0, SCHARS (tem), coding)) |
d6a3cc15 RS |
4876 | return -1; |
4877 | } | |
4878 | *annot = Fcdr (*annot); | |
4879 | } | |
dfcf069d | 4880 | return 0; |
d6a3cc15 RS |
4881 | } |
4882 | ||
6fdaa9a0 | 4883 | |
ce51c54c KH |
4884 | /* Write text in the range START and END into descriptor DESC, |
4885 | encoding them with coding system CODING. If STRING is nil, START | |
4886 | and END are character positions of the current buffer, else they | |
4887 | are indexes to the string STRING. */ | |
ec7adf26 RS |
4888 | |
4889 | static int | |
ce51c54c | 4890 | e_write (desc, string, start, end, coding) |
570d7624 | 4891 | int desc; |
ce51c54c KH |
4892 | Lisp_Object string; |
4893 | int start, end; | |
6fdaa9a0 | 4894 | struct coding_system *coding; |
570d7624 | 4895 | { |
ce51c54c KH |
4896 | if (STRINGP (string)) |
4897 | { | |
db327c7e | 4898 | start = 0; |
8f924df7 | 4899 | end = SCHARS (string); |
ce51c54c | 4900 | } |
570d7624 | 4901 | |
6fdaa9a0 KH |
4902 | /* We used to have a code for handling selective display here. But, |
4903 | now it is handled within encode_coding. */ | |
01ca97a2 KH |
4904 | |
4905 | while (start < end) | |
570d7624 | 4906 | { |
01ca97a2 | 4907 | if (STRINGP (string)) |
6ad568dd | 4908 | { |
01ca97a2 KH |
4909 | coding->src_multibyte = SCHARS (string) < SBYTES (string); |
4910 | if (CODING_REQUIRE_ENCODING (coding)) | |
4911 | { | |
4912 | encode_coding_object (coding, string, | |
4913 | start, string_char_to_byte (string, start), | |
4914 | end, string_char_to_byte (string, end), Qt); | |
4915 | } | |
4916 | else | |
4917 | { | |
4918 | coding->dst_object = string; | |
4919 | coding->consumed_char = SCHARS (string); | |
4920 | coding->produced = SBYTES (string); | |
4921 | } | |
6ad568dd | 4922 | } |
db327c7e | 4923 | else |
6ad568dd | 4924 | { |
01ca97a2 KH |
4925 | int start_byte = CHAR_TO_BYTE (start); |
4926 | int end_byte = CHAR_TO_BYTE (end); | |
b4132433 | 4927 | |
01ca97a2 KH |
4928 | coding->src_multibyte = (end - start) < (end_byte - start_byte); |
4929 | if (CODING_REQUIRE_ENCODING (coding)) | |
4930 | { | |
4931 | encode_coding_object (coding, Fcurrent_buffer (), | |
4932 | start, start_byte, end, end_byte, Qt); | |
4933 | } | |
4934 | else | |
4935 | { | |
4936 | coding->dst_object = Qnil; | |
4937 | coding->dst_pos_byte = start_byte; | |
4938 | if (start >= GPT || end <= GPT) | |
4939 | { | |
4940 | coding->consumed_char = end - start; | |
4941 | coding->produced = end_byte - start_byte; | |
4942 | } | |
4943 | else | |
4944 | { | |
4945 | coding->consumed_char = GPT - start; | |
4946 | coding->produced = GPT_BYTE - start_byte; | |
4947 | } | |
4948 | } | |
c185d744 | 4949 | } |
01ca97a2 KH |
4950 | |
4951 | if (coding->produced > 0) | |
c185d744 | 4952 | { |
01ca97a2 KH |
4953 | coding->produced -= |
4954 | emacs_write (desc, | |
4955 | STRINGP (coding->dst_object) | |
4956 | ? SDATA (coding->dst_object) | |
4957 | : BYTE_POS_ADDR (coding->dst_pos_byte), | |
4958 | coding->produced); | |
4959 | ||
4960 | if (coding->produced) | |
4961 | return -1; | |
570d7624 | 4962 | } |
01ca97a2 | 4963 | start += coding->consumed_char; |
c185d744 KH |
4964 | } |
4965 | ||
4966 | return 0; | |
570d7624 | 4967 | } |
ec7adf26 | 4968 | \f |
570d7624 | 4969 | DEFUN ("verify-visited-file-modtime", Fverify_visited_file_modtime, |
8c1a1077 PJ |
4970 | Sverify_visited_file_modtime, 1, 1, 0, |
4971 | doc: /* Return t if last mod time of BUF's visited file matches what BUF records. | |
6b61353c KH |
4972 | This means that the file has not been changed since it was visited or saved. |
4973 | See Info node `(elisp)Modification Time' for more details. */) | |
8c1a1077 | 4974 | (buf) |
570d7624 JB |
4975 | Lisp_Object buf; |
4976 | { | |
4977 | struct buffer *b; | |
4978 | struct stat st; | |
32f4334d | 4979 | Lisp_Object handler; |
b1d1b865 | 4980 | Lisp_Object filename; |
570d7624 | 4981 | |
b7826503 | 4982 | CHECK_BUFFER (buf); |
570d7624 JB |
4983 | b = XBUFFER (buf); |
4984 | ||
93c30b5f | 4985 | if (!STRINGP (b->filename)) return Qt; |
570d7624 JB |
4986 | if (b->modtime == 0) return Qt; |
4987 | ||
32f4334d RS |
4988 | /* If the file name has special constructs in it, |
4989 | call the corresponding file handler. */ | |
49307295 KH |
4990 | handler = Ffind_file_name_handler (b->filename, |
4991 | Qverify_visited_file_modtime); | |
32f4334d | 4992 | if (!NILP (handler)) |
09121adc | 4993 | return call2 (handler, Qverify_visited_file_modtime, buf); |
32f4334d | 4994 | |
b1d1b865 RS |
4995 | filename = ENCODE_FILE (b->filename); |
4996 | ||
d5db4077 | 4997 | if (stat (SDATA (filename), &st) < 0) |
570d7624 JB |
4998 | { |
4999 | /* If the file doesn't exist now and didn't exist before, | |
5000 | we say that it isn't modified, provided the error is a tame one. */ | |
5001 | if (errno == ENOENT || errno == EACCES || errno == ENOTDIR) | |
5002 | st.st_mtime = -1; | |
5003 | else | |
5004 | st.st_mtime = 0; | |
5005 | } | |
5006 | if (st.st_mtime == b->modtime | |
5007 | /* If both are positive, accept them if they are off by one second. */ | |
5008 | || (st.st_mtime > 0 && b->modtime > 0 | |
5009 | && (st.st_mtime == b->modtime + 1 | |
5010 | || st.st_mtime == b->modtime - 1))) | |
5011 | return Qt; | |
5012 | return Qnil; | |
5013 | } | |
5014 | ||
5015 | DEFUN ("clear-visited-file-modtime", Fclear_visited_file_modtime, | |
8c1a1077 PJ |
5016 | Sclear_visited_file_modtime, 0, 0, 0, |
5017 | doc: /* Clear out records of last mod time of visited file. | |
5018 | Next attempt to save will certainly not complain of a discrepancy. */) | |
5019 | () | |
570d7624 JB |
5020 | { |
5021 | current_buffer->modtime = 0; | |
5022 | return Qnil; | |
5023 | } | |
5024 | ||
f5d5eccf | 5025 | DEFUN ("visited-file-modtime", Fvisited_file_modtime, |
8c1a1077 PJ |
5026 | Svisited_file_modtime, 0, 0, 0, |
5027 | doc: /* Return the current buffer's recorded visited file modification time. | |
e5fcddc8 | 5028 | The value is a list of the form (HIGH LOW), like the time values |
6b61353c KH |
5029 | that `file-attributes' returns. If the current buffer has no recorded |
5030 | file modification time, this function returns 0. | |
5031 | See Info node `(elisp)Modification Time' for more details. */) | |
8c1a1077 | 5032 | () |
f5d5eccf | 5033 | { |
73ff9d42 RS |
5034 | if (! current_buffer->modtime) |
5035 | return make_number (0); | |
5036 | return make_time ((time_t) current_buffer->modtime); | |
f5d5eccf RS |
5037 | } |
5038 | ||
570d7624 | 5039 | DEFUN ("set-visited-file-modtime", Fset_visited_file_modtime, |
8c1a1077 PJ |
5040 | Sset_visited_file_modtime, 0, 1, 0, |
5041 | doc: /* Update buffer's recorded modification time from the visited file's time. | |
5042 | Useful if the buffer was not read from the file normally | |
5043 | or if the file itself has been changed for some known benign reason. | |
5044 | An argument specifies the modification time value to use | |
5045 | \(instead of that of the visited file), in the form of a list | |
5046 | \(HIGH . LOW) or (HIGH LOW). */) | |
5047 | (time_list) | |
f5d5eccf | 5048 | Lisp_Object time_list; |
570d7624 | 5049 | { |
f5d5eccf RS |
5050 | if (!NILP (time_list)) |
5051 | current_buffer->modtime = cons_to_long (time_list); | |
5052 | else | |
5053 | { | |
5054 | register Lisp_Object filename; | |
5055 | struct stat st; | |
5056 | Lisp_Object handler; | |
570d7624 | 5057 | |
f5d5eccf | 5058 | filename = Fexpand_file_name (current_buffer->filename, Qnil); |
32f4334d | 5059 | |
f5d5eccf RS |
5060 | /* If the file name has special constructs in it, |
5061 | call the corresponding file handler. */ | |
49307295 | 5062 | handler = Ffind_file_name_handler (filename, Qset_visited_file_modtime); |
f5d5eccf | 5063 | if (!NILP (handler)) |
caf3c431 | 5064 | /* The handler can find the file name the same way we did. */ |
76c881b0 | 5065 | return call2 (handler, Qset_visited_file_modtime, Qnil); |
b1d1b865 RS |
5066 | |
5067 | filename = ENCODE_FILE (filename); | |
5068 | ||
d5db4077 | 5069 | if (stat (SDATA (filename), &st) >= 0) |
f5d5eccf RS |
5070 | current_buffer->modtime = st.st_mtime; |
5071 | } | |
570d7624 JB |
5072 | |
5073 | return Qnil; | |
5074 | } | |
5075 | \f | |
5076 | Lisp_Object | |
d7f31e22 GM |
5077 | auto_save_error (error) |
5078 | Lisp_Object error; | |
570d7624 | 5079 | { |
d7f31e22 GM |
5080 | Lisp_Object args[3], msg; |
5081 | int i, nbytes; | |
5082 | struct gcpro gcpro1; | |
dfc22242 KS |
5083 | char *msgbuf; |
5084 | USE_SAFE_ALLOCA; | |
efdc16c9 | 5085 | |
ca730bf0 CY |
5086 | auto_save_error_occurred = 1; |
5087 | ||
385ed61f | 5088 | ring_bell (XFRAME (selected_frame)); |
efdc16c9 | 5089 | |
d7f31e22 GM |
5090 | args[0] = build_string ("Auto-saving %s: %s"); |
5091 | args[1] = current_buffer->name; | |
5092 | args[2] = Ferror_message_string (error); | |
5093 | msg = Fformat (3, args); | |
5094 | GCPRO1 (msg); | |
d5db4077 | 5095 | nbytes = SBYTES (msg); |
dfc22242 KS |
5096 | SAFE_ALLOCA (msgbuf, char *, nbytes); |
5097 | bcopy (SDATA (msg), msgbuf, nbytes); | |
d7f31e22 GM |
5098 | |
5099 | for (i = 0; i < 3; ++i) | |
5100 | { | |
5101 | if (i == 0) | |
dfc22242 | 5102 | message2 (msgbuf, nbytes, STRING_MULTIBYTE (msg)); |
d7f31e22 | 5103 | else |
dfc22242 | 5104 | message2_nolog (msgbuf, nbytes, STRING_MULTIBYTE (msg)); |
d7f31e22 GM |
5105 | Fsleep_for (make_number (1), Qnil); |
5106 | } | |
5107 | ||
e01f7773 | 5108 | SAFE_FREE (); |
d7f31e22 | 5109 | UNGCPRO; |
570d7624 JB |
5110 | return Qnil; |
5111 | } | |
5112 | ||
5113 | Lisp_Object | |
5114 | auto_save_1 () | |
5115 | { | |
570d7624 | 5116 | struct stat st; |
d4a42098 KS |
5117 | Lisp_Object modes; |
5118 | ||
5119 | auto_save_mode_bits = 0666; | |
570d7624 JB |
5120 | |
5121 | /* Get visited file's mode to become the auto save file's mode. */ | |
d4a42098 KS |
5122 | if (! NILP (current_buffer->filename)) |
5123 | { | |
5124 | if (stat (SDATA (current_buffer->filename), &st) >= 0) | |
5125 | /* But make sure we can overwrite it later! */ | |
5126 | auto_save_mode_bits = st.st_mode | 0600; | |
5127 | else if ((modes = Ffile_modes (current_buffer->filename), | |
5128 | INTEGERP (modes))) | |
5129 | /* Remote files don't cooperate with stat. */ | |
5130 | auto_save_mode_bits = XINT (modes) | 0600; | |
5131 | } | |
570d7624 JB |
5132 | |
5133 | return | |
699b53bc CY |
5134 | Fwrite_region (Qnil, Qnil, current_buffer->auto_save_file_name, Qnil, |
5135 | NILP (Vauto_save_visited_file_name) ? Qlambda : Qt, | |
5136 | Qnil, Qnil); | |
570d7624 JB |
5137 | } |
5138 | ||
e54d3b5d | 5139 | static Lisp_Object |
fff7e982 KS |
5140 | do_auto_save_unwind (arg) /* used as unwind-protect function */ |
5141 | Lisp_Object arg; | |
e54d3b5d | 5142 | { |
fff7e982 | 5143 | FILE *stream = (FILE *) XSAVE_VALUE (arg)->pointer; |
3be3c08e | 5144 | auto_saving = 0; |
fff7e982 | 5145 | if (stream != NULL) |
aab12958 YM |
5146 | { |
5147 | BLOCK_INPUT; | |
5148 | fclose (stream); | |
5149 | UNBLOCK_INPUT; | |
5150 | } | |
e54d3b5d RS |
5151 | return Qnil; |
5152 | } | |
5153 | ||
a8c828be RS |
5154 | static Lisp_Object |
5155 | do_auto_save_unwind_1 (value) /* used as unwind-protect function */ | |
5156 | Lisp_Object value; | |
5157 | { | |
5158 | minibuffer_auto_raise = XINT (value); | |
5159 | return Qnil; | |
5160 | } | |
5161 | ||
5794dd61 RS |
5162 | static Lisp_Object |
5163 | do_auto_save_make_dir (dir) | |
5164 | Lisp_Object dir; | |
5165 | { | |
26816cbf SG |
5166 | Lisp_Object mode; |
5167 | ||
5168 | call2 (Qmake_directory, dir, Qt); | |
5169 | XSETFASTINT (mode, 0700); | |
5170 | return Fset_file_modes (dir, mode); | |
5794dd61 RS |
5171 | } |
5172 | ||
5173 | static Lisp_Object | |
5174 | do_auto_save_eh (ignore) | |
5175 | Lisp_Object ignore; | |
5176 | { | |
5177 | return Qnil; | |
5178 | } | |
5179 | ||
570d7624 | 5180 | DEFUN ("do-auto-save", Fdo_auto_save, Sdo_auto_save, 0, 2, "", |
8c1a1077 PJ |
5181 | doc: /* Auto-save all buffers that need it. |
5182 | This is all buffers that have auto-saving enabled | |
5183 | and are changed since last auto-saved. | |
5184 | Auto-saving writes the buffer into a file | |
5185 | so that your editing is not lost if the system crashes. | |
5186 | This file is not the file you visited; that changes only when you save. | |
5187 | Normally we run the normal hook `auto-save-hook' before saving. | |
5188 | ||
5189 | A non-nil NO-MESSAGE argument means do not print any message if successful. | |
5190 | A non-nil CURRENT-ONLY argument means save only current buffer. */) | |
5191 | (no_message, current_only) | |
17857782 | 5192 | Lisp_Object no_message, current_only; |
570d7624 JB |
5193 | { |
5194 | struct buffer *old = current_buffer, *b; | |
5195 | Lisp_Object tail, buf; | |
5196 | int auto_saved = 0; | |
f14b1c68 | 5197 | int do_handled_files; |
ff4c9993 | 5198 | Lisp_Object oquit; |
fff7e982 | 5199 | FILE *stream = NULL; |
aed13378 | 5200 | int count = SPECPDL_INDEX (); |
a8c828be | 5201 | int orig_minibuffer_auto_raise = minibuffer_auto_raise; |
5794dd61 | 5202 | int old_message_p = 0; |
d57563b6 | 5203 | struct gcpro gcpro1, gcpro2; |
38da540d RS |
5204 | |
5205 | if (max_specpdl_size < specpdl_size + 40) | |
5206 | max_specpdl_size = specpdl_size + 40; | |
5207 | ||
5208 | if (minibuf_level) | |
5209 | no_message = Qt; | |
5210 | ||
5794dd61 RS |
5211 | if (NILP (no_message)) |
5212 | { | |
5213 | old_message_p = push_message (); | |
5214 | record_unwind_protect (pop_message_unwind, Qnil); | |
5215 | } | |
efdc16c9 | 5216 | |
ff4c9993 RS |
5217 | /* Ordinarily don't quit within this function, |
5218 | but don't make it impossible to quit (in case we get hung in I/O). */ | |
5219 | oquit = Vquit_flag; | |
5220 | Vquit_flag = Qnil; | |
570d7624 JB |
5221 | |
5222 | /* No GCPRO needed, because (when it matters) all Lisp_Object variables | |
5223 | point to non-strings reached from Vbuffer_alist. */ | |
5224 | ||
265a9e55 | 5225 | if (!NILP (Vrun_hooks)) |
570d7624 JB |
5226 | call1 (Vrun_hooks, intern ("auto-save-hook")); |
5227 | ||
e54d3b5d RS |
5228 | if (STRINGP (Vauto_save_list_file_name)) |
5229 | { | |
0894672f | 5230 | Lisp_Object listfile; |
efdc16c9 | 5231 | |
258fd2cb | 5232 | listfile = Fexpand_file_name (Vauto_save_list_file_name, Qnil); |
0894672f GM |
5233 | |
5234 | /* Don't try to create the directory when shutting down Emacs, | |
5235 | because creating the directory might signal an error, and | |
5236 | that would leave Emacs in a strange state. */ | |
5237 | if (!NILP (Vrun_hooks)) | |
5238 | { | |
5239 | Lisp_Object dir; | |
d57563b6 RS |
5240 | dir = Qnil; |
5241 | GCPRO2 (dir, listfile); | |
0894672f GM |
5242 | dir = Ffile_name_directory (listfile); |
5243 | if (NILP (Ffile_directory_p (dir))) | |
5794dd61 RS |
5244 | internal_condition_case_1 (do_auto_save_make_dir, |
5245 | dir, Fcons (Fcons (Qfile_error, Qnil), Qnil), | |
5246 | do_auto_save_eh); | |
d57563b6 | 5247 | UNGCPRO; |
0894672f | 5248 | } |
efdc16c9 | 5249 | |
d5db4077 | 5250 | stream = fopen (SDATA (listfile), "w"); |
1b335d29 | 5251 | } |
199607e4 | 5252 | |
fff7e982 KS |
5253 | record_unwind_protect (do_auto_save_unwind, |
5254 | make_save_value (stream, 0)); | |
a8c828be RS |
5255 | record_unwind_protect (do_auto_save_unwind_1, |
5256 | make_number (minibuffer_auto_raise)); | |
5257 | minibuffer_auto_raise = 0; | |
3be3c08e | 5258 | auto_saving = 1; |
ca730bf0 | 5259 | auto_save_error_occurred = 0; |
3be3c08e | 5260 | |
6b61353c KH |
5261 | /* On first pass, save all files that don't have handlers. |
5262 | On second pass, save all files that do have handlers. | |
5263 | ||
5264 | If Emacs is crashing, the handlers may tweak what is causing | |
5265 | Emacs to crash in the first place, and it would be a shame if | |
5266 | Emacs failed to autosave perfectly ordinary files because it | |
5267 | couldn't handle some ange-ftp'd file. */ | |
5268 | ||
f14b1c68 | 5269 | for (do_handled_files = 0; do_handled_files < 2; do_handled_files++) |
8e50cc2d | 5270 | for (tail = Vbuffer_alist; CONSP (tail); tail = XCDR (tail)) |
f14b1c68 | 5271 | { |
03699b14 | 5272 | buf = XCDR (XCAR (tail)); |
f14b1c68 | 5273 | b = XBUFFER (buf); |
199607e4 | 5274 | |
e54d3b5d | 5275 | /* Record all the buffers that have auto save mode |
258fd2cb RS |
5276 | in the special file that lists them. For each of these buffers, |
5277 | Record visited name (if any) and auto save name. */ | |
93c30b5f | 5278 | if (STRINGP (b->auto_save_file_name) |
1b335d29 | 5279 | && stream != NULL && do_handled_files == 0) |
e54d3b5d | 5280 | { |
aab12958 | 5281 | BLOCK_INPUT; |
258fd2cb RS |
5282 | if (!NILP (b->filename)) |
5283 | { | |
d5db4077 KR |
5284 | fwrite (SDATA (b->filename), 1, |
5285 | SBYTES (b->filename), stream); | |
258fd2cb | 5286 | } |
1b335d29 | 5287 | putc ('\n', stream); |
d5db4077 KR |
5288 | fwrite (SDATA (b->auto_save_file_name), 1, |
5289 | SBYTES (b->auto_save_file_name), stream); | |
1b335d29 | 5290 | putc ('\n', stream); |
aab12958 | 5291 | UNBLOCK_INPUT; |
e54d3b5d | 5292 | } |
17857782 | 5293 | |
f14b1c68 JB |
5294 | if (!NILP (current_only) |
5295 | && b != current_buffer) | |
5296 | continue; | |
e54d3b5d | 5297 | |
95385625 RS |
5298 | /* Don't auto-save indirect buffers. |
5299 | The base buffer takes care of it. */ | |
5300 | if (b->base_buffer) | |
5301 | continue; | |
5302 | ||
f14b1c68 JB |
5303 | /* Check for auto save enabled |
5304 | and file changed since last auto save | |
5305 | and file changed since last real save. */ | |
93c30b5f | 5306 | if (STRINGP (b->auto_save_file_name) |
95385625 | 5307 | && BUF_SAVE_MODIFF (b) < BUF_MODIFF (b) |
f14b1c68 | 5308 | && b->auto_save_modified < BUF_MODIFF (b) |
82c2d839 RS |
5309 | /* -1 means we've turned off autosaving for a while--see below. */ |
5310 | && XINT (b->save_length) >= 0 | |
f14b1c68 | 5311 | && (do_handled_files |
49307295 KH |
5312 | || NILP (Ffind_file_name_handler (b->auto_save_file_name, |
5313 | Qwrite_region)))) | |
f14b1c68 | 5314 | { |
b60247d9 RS |
5315 | EMACS_TIME before_time, after_time; |
5316 | ||
5317 | EMACS_GET_TIME (before_time); | |
5318 | ||
5319 | /* If we had a failure, don't try again for 20 minutes. */ | |
5320 | if (b->auto_save_failure_time >= 0 | |
5321 | && EMACS_SECS (before_time) - b->auto_save_failure_time < 1200) | |
5322 | continue; | |
5323 | ||
f14b1c68 JB |
5324 | if ((XFASTINT (b->save_length) * 10 |
5325 | > (BUF_Z (b) - BUF_BEG (b)) * 13) | |
5326 | /* A short file is likely to change a large fraction; | |
5327 | spare the user annoying messages. */ | |
5328 | && XFASTINT (b->save_length) > 5000 | |
5329 | /* These messages are frequent and annoying for `*mail*'. */ | |
5330 | && !EQ (b->filename, Qnil) | |
5331 | && NILP (no_message)) | |
5332 | { | |
5333 | /* It has shrunk too much; turn off auto-saving here. */ | |
a8c828be | 5334 | minibuffer_auto_raise = orig_minibuffer_auto_raise; |
fd91d0d4 | 5335 | message_with_string ("Buffer %s has shrunk a lot; auto save disabled in that buffer until next real save", |
60d67b83 | 5336 | b->name, 1); |
a8c828be | 5337 | minibuffer_auto_raise = 0; |
82c2d839 RS |
5338 | /* Turn off auto-saving until there's a real save, |
5339 | and prevent any more warnings. */ | |
46283abe | 5340 | XSETINT (b->save_length, -1); |
f14b1c68 JB |
5341 | Fsleep_for (make_number (1), Qnil); |
5342 | continue; | |
5343 | } | |
5344 | set_buffer_internal (b); | |
5345 | if (!auto_saved && NILP (no_message)) | |
5346 | message1 ("Auto-saving..."); | |
5347 | internal_condition_case (auto_save_1, Qt, auto_save_error); | |
5348 | auto_saved++; | |
5349 | b->auto_save_modified = BUF_MODIFF (b); | |
2acfd7ae | 5350 | XSETFASTINT (current_buffer->save_length, Z - BEG); |
f14b1c68 | 5351 | set_buffer_internal (old); |
b60247d9 RS |
5352 | |
5353 | EMACS_GET_TIME (after_time); | |
5354 | ||
5355 | /* If auto-save took more than 60 seconds, | |
5356 | assume it was an NFS failure that got a timeout. */ | |
5357 | if (EMACS_SECS (after_time) - EMACS_SECS (before_time) > 60) | |
5358 | b->auto_save_failure_time = EMACS_SECS (after_time); | |
f14b1c68 JB |
5359 | } |
5360 | } | |
570d7624 | 5361 | |
b67f2ca5 RS |
5362 | /* Prevent another auto save till enough input events come in. */ |
5363 | record_auto_save (); | |
570d7624 | 5364 | |
17857782 | 5365 | if (auto_saved && NILP (no_message)) |
f05b275b | 5366 | { |
5794dd61 | 5367 | if (old_message_p) |
31f3d831 | 5368 | { |
5794dd61 RS |
5369 | /* If we are going to restore an old message, |
5370 | give time to read ours. */ | |
83f8d903 | 5371 | sit_for (make_number (1), 0, 0); |
c71106e5 | 5372 | restore_message (); |
31f3d831 | 5373 | } |
ca730bf0 | 5374 | else if (!auto_save_error_occurred) |
31e31a15 CY |
5375 | /* Don't overwrite the error message if an error occurred. |
5376 | If we displayed a message and then restored a state | |
5794dd61 | 5377 | with no message, leave a "done" message on the screen. */ |
f05b275b KH |
5378 | message1 ("Auto-saving...done"); |
5379 | } | |
570d7624 | 5380 | |
ff4c9993 RS |
5381 | Vquit_flag = oquit; |
5382 | ||
5794dd61 | 5383 | /* This restores the message-stack status. */ |
e54d3b5d | 5384 | unbind_to (count, Qnil); |
570d7624 JB |
5385 | return Qnil; |
5386 | } | |
5387 | ||
5388 | DEFUN ("set-buffer-auto-saved", Fset_buffer_auto_saved, | |
8c1a1077 PJ |
5389 | Sset_buffer_auto_saved, 0, 0, 0, |
5390 | doc: /* Mark current buffer as auto-saved with its current text. | |
5391 | No auto-save file will be written until the buffer changes again. */) | |
5392 | () | |
570d7624 JB |
5393 | { |
5394 | current_buffer->auto_save_modified = MODIFF; | |
2acfd7ae | 5395 | XSETFASTINT (current_buffer->save_length, Z - BEG); |
b60247d9 RS |
5396 | current_buffer->auto_save_failure_time = -1; |
5397 | return Qnil; | |
5398 | } | |
5399 | ||
5400 | DEFUN ("clear-buffer-auto-save-failure", Fclear_buffer_auto_save_failure, | |
8c1a1077 PJ |
5401 | Sclear_buffer_auto_save_failure, 0, 0, 0, |
5402 | doc: /* Clear any record of a recent auto-save failure in the current buffer. */) | |
5403 | () | |
b60247d9 RS |
5404 | { |
5405 | current_buffer->auto_save_failure_time = -1; | |
570d7624 JB |
5406 | return Qnil; |
5407 | } | |
5408 | ||
5409 | DEFUN ("recent-auto-save-p", Frecent_auto_save_p, Srecent_auto_save_p, | |
8c1a1077 | 5410 | 0, 0, 0, |
68780e2a RS |
5411 | doc: /* Return t if current buffer has been auto-saved recently. |
5412 | More precisely, if it has been auto-saved since last read from or saved | |
5413 | in the visited file. If the buffer has no visited file, | |
5414 | then any auto-save counts as "recent". */) | |
8c1a1077 | 5415 | () |
570d7624 | 5416 | { |
95385625 | 5417 | return (SAVE_MODIFF < current_buffer->auto_save_modified) ? Qt : Qnil; |
570d7624 JB |
5418 | } |
5419 | \f | |
5420 | /* Reading and completing file names */ | |
6e710ae5 | 5421 | |
88208bb8 JD |
5422 | DEFUN ("next-read-file-uses-dialog-p", Fnext_read_file_uses_dialog_p, |
5423 | Snext_read_file_uses_dialog_p, 0, 0, 0, | |
5424 | doc: /* Return t if a call to `read-file-name' will use a dialog. | |
5425 | The return value is only relevant for a call to `read-file-name' that happens | |
1a0de25c | 5426 | before any other event (mouse or keypress) is handled. */) |
88208bb8 JD |
5427 | () |
5428 | { | |
9e2a2647 | 5429 | #if defined (USE_MOTIF) || defined (HAVE_NTGUI) || defined (USE_GTK) |
88208bb8 JD |
5430 | if ((NILP (last_nonmenu_event) || CONSP (last_nonmenu_event)) |
5431 | && use_dialog_box | |
5432 | && use_file_dialog | |
5433 | && have_menus_p ()) | |
5434 | return Qt; | |
5435 | #endif | |
5436 | return Qnil; | |
5437 | } | |
d4a42098 | 5438 | |
dbd50d4b SM |
5439 | Lisp_Object |
5440 | Fread_file_name (prompt, dir, default_filename, mustmatch, initial, predicate) | |
59ffe07d | 5441 | Lisp_Object prompt, dir, default_filename, mustmatch, initial, predicate; |
570d7624 | 5442 | { |
570d7624 | 5443 | struct gcpro gcpro1, gcpro2; |
dbd50d4b | 5444 | Lisp_Object args[7]; |
a79485af | 5445 | |
71e1f69d | 5446 | GCPRO1 (default_filename); |
dbd50d4b SM |
5447 | args[0] = intern ("read-file-name"); |
5448 | args[1] = prompt; | |
5449 | args[2] = dir; | |
5450 | args[3] = default_filename; | |
5451 | args[4] = mustmatch; | |
5452 | args[5] = initial; | |
5453 | args[6] = predicate; | |
5454 | RETURN_UNGCPRO (Ffuncall (7, args)); | |
570d7624 | 5455 | } |
9c856db9 | 5456 | |
570d7624 | 5457 | \f |
dbda5089 GV |
5458 | void |
5459 | init_fileio_once () | |
5460 | { | |
5461 | /* Must be set before any path manipulation is performed. */ | |
5462 | XSETFASTINT (Vdirectory_sep_char, '/'); | |
5463 | } | |
5464 | ||
9c856db9 | 5465 | \f |
dfcf069d | 5466 | void |
570d7624 JB |
5467 | syms_of_fileio () |
5468 | { | |
f6c9b683 | 5469 | Qoperations = intern ("operations"); |
0bf2eed2 | 5470 | Qexpand_file_name = intern ("expand-file-name"); |
273e0829 | 5471 | Qsubstitute_in_file_name = intern ("substitute-in-file-name"); |
0bf2eed2 RS |
5472 | Qdirectory_file_name = intern ("directory-file-name"); |
5473 | Qfile_name_directory = intern ("file-name-directory"); | |
5474 | Qfile_name_nondirectory = intern ("file-name-nondirectory"); | |
642ef245 | 5475 | Qunhandled_file_name_directory = intern ("unhandled-file-name-directory"); |
0bf2eed2 | 5476 | Qfile_name_as_directory = intern ("file-name-as-directory"); |
32f4334d | 5477 | Qcopy_file = intern ("copy-file"); |
a6e6e718 | 5478 | Qmake_directory_internal = intern ("make-directory-internal"); |
b272d624 | 5479 | Qmake_directory = intern ("make-directory"); |
32f4334d RS |
5480 | Qdelete_directory = intern ("delete-directory"); |
5481 | Qdelete_file = intern ("delete-file"); | |
5482 | Qrename_file = intern ("rename-file"); | |
5483 | Qadd_name_to_file = intern ("add-name-to-file"); | |
5484 | Qmake_symbolic_link = intern ("make-symbolic-link"); | |
5485 | Qfile_exists_p = intern ("file-exists-p"); | |
5486 | Qfile_executable_p = intern ("file-executable-p"); | |
5487 | Qfile_readable_p = intern ("file-readable-p"); | |
32f4334d | 5488 | Qfile_writable_p = intern ("file-writable-p"); |
1f8653eb RS |
5489 | Qfile_symlink_p = intern ("file-symlink-p"); |
5490 | Qaccess_file = intern ("access-file"); | |
32f4334d | 5491 | Qfile_directory_p = intern ("file-directory-p"); |
adedc71d | 5492 | Qfile_regular_p = intern ("file-regular-p"); |
32f4334d RS |
5493 | Qfile_accessible_directory_p = intern ("file-accessible-directory-p"); |
5494 | Qfile_modes = intern ("file-modes"); | |
5495 | Qset_file_modes = intern ("set-file-modes"); | |
819da85b | 5496 | Qset_file_times = intern ("set-file-times"); |
32f4334d RS |
5497 | Qfile_newer_than_file_p = intern ("file-newer-than-file-p"); |
5498 | Qinsert_file_contents = intern ("insert-file-contents"); | |
5499 | Qwrite_region = intern ("write-region"); | |
5500 | Qverify_visited_file_modtime = intern ("verify-visited-file-modtime"); | |
3ec46acd | 5501 | Qset_visited_file_modtime = intern ("set-visited-file-modtime"); |
356a6224 | 5502 | Qauto_save_coding = intern ("auto-save-coding"); |
32f4334d | 5503 | |
f6c9b683 | 5504 | staticpro (&Qoperations); |
642ef245 | 5505 | staticpro (&Qexpand_file_name); |
273e0829 | 5506 | staticpro (&Qsubstitute_in_file_name); |
642ef245 JB |
5507 | staticpro (&Qdirectory_file_name); |
5508 | staticpro (&Qfile_name_directory); | |
5509 | staticpro (&Qfile_name_nondirectory); | |
5510 | staticpro (&Qunhandled_file_name_directory); | |
5511 | staticpro (&Qfile_name_as_directory); | |
15c65264 | 5512 | staticpro (&Qcopy_file); |
c34b559d | 5513 | staticpro (&Qmake_directory_internal); |
b272d624 | 5514 | staticpro (&Qmake_directory); |
15c65264 RS |
5515 | staticpro (&Qdelete_directory); |
5516 | staticpro (&Qdelete_file); | |
5517 | staticpro (&Qrename_file); | |
5518 | staticpro (&Qadd_name_to_file); | |
5519 | staticpro (&Qmake_symbolic_link); | |
5520 | staticpro (&Qfile_exists_p); | |
5521 | staticpro (&Qfile_executable_p); | |
5522 | staticpro (&Qfile_readable_p); | |
15c65264 | 5523 | staticpro (&Qfile_writable_p); |
1f8653eb RS |
5524 | staticpro (&Qaccess_file); |
5525 | staticpro (&Qfile_symlink_p); | |
15c65264 | 5526 | staticpro (&Qfile_directory_p); |
adedc71d | 5527 | staticpro (&Qfile_regular_p); |
15c65264 RS |
5528 | staticpro (&Qfile_accessible_directory_p); |
5529 | staticpro (&Qfile_modes); | |
5530 | staticpro (&Qset_file_modes); | |
819da85b | 5531 | staticpro (&Qset_file_times); |
15c65264 RS |
5532 | staticpro (&Qfile_newer_than_file_p); |
5533 | staticpro (&Qinsert_file_contents); | |
5534 | staticpro (&Qwrite_region); | |
5535 | staticpro (&Qverify_visited_file_modtime); | |
0a61794b | 5536 | staticpro (&Qset_visited_file_modtime); |
356a6224 | 5537 | staticpro (&Qauto_save_coding); |
642ef245 JB |
5538 | |
5539 | Qfile_name_history = intern ("file-name-history"); | |
5540 | Fset (Qfile_name_history, Qnil); | |
15c65264 RS |
5541 | staticpro (&Qfile_name_history); |
5542 | ||
570d7624 JB |
5543 | Qfile_error = intern ("file-error"); |
5544 | staticpro (&Qfile_error); | |
199607e4 | 5545 | Qfile_already_exists = intern ("file-already-exists"); |
570d7624 | 5546 | staticpro (&Qfile_already_exists); |
c0b7b21c RS |
5547 | Qfile_date_error = intern ("file-date-error"); |
5548 | staticpro (&Qfile_date_error); | |
505ab9bc RS |
5549 | Qexcl = intern ("excl"); |
5550 | staticpro (&Qexcl); | |
570d7624 | 5551 | |
5e570b75 | 5552 | #ifdef DOS_NT |
4c3c22f3 RS |
5553 | Qfind_buffer_file_type = intern ("find-buffer-file-type"); |
5554 | staticpro (&Qfind_buffer_file_type); | |
5e570b75 | 5555 | #endif /* DOS_NT */ |
4c3c22f3 | 5556 | |
b1d1b865 | 5557 | DEFVAR_LISP ("file-name-coding-system", &Vfile_name_coding_system, |
8c1a1077 | 5558 | doc: /* *Coding system for encoding file names. |
346ebf53 | 5559 | If it is nil, `default-file-name-coding-system' (which see) is used. */); |
b1d1b865 RS |
5560 | Vfile_name_coding_system = Qnil; |
5561 | ||
cd913586 KH |
5562 | DEFVAR_LISP ("default-file-name-coding-system", |
5563 | &Vdefault_file_name_coding_system, | |
8c1a1077 | 5564 | doc: /* Default coding system for encoding file names. |
346ebf53 | 5565 | This variable is used only when `file-name-coding-system' is nil. |
8c1a1077 | 5566 | |
346ebf53 | 5567 | This variable is set/changed by the command `set-language-environment'. |
8c1a1077 | 5568 | User should not set this variable manually, |
346ebf53 | 5569 | instead use `file-name-coding-system' to get a constant encoding |
8c1a1077 | 5570 | of file names regardless of the current language environment. */); |
cd913586 KH |
5571 | Vdefault_file_name_coding_system = Qnil; |
5572 | ||
0d420e88 BG |
5573 | Qformat_decode = intern ("format-decode"); |
5574 | staticpro (&Qformat_decode); | |
5575 | Qformat_annotate_function = intern ("format-annotate-function"); | |
5576 | staticpro (&Qformat_annotate_function); | |
2080470e KH |
5577 | Qafter_insert_file_set_coding = intern ("after-insert-file-set-coding"); |
5578 | staticpro (&Qafter_insert_file_set_coding); | |
efdc16c9 | 5579 | |
d6a3cc15 RS |
5580 | Qcar_less_than_car = intern ("car-less-than-car"); |
5581 | staticpro (&Qcar_less_than_car); | |
5582 | ||
570d7624 | 5583 | Fput (Qfile_error, Qerror_conditions, |
24b1ddad | 5584 | list2 (Qfile_error, Qerror)); |
570d7624 JB |
5585 | Fput (Qfile_error, Qerror_message, |
5586 | build_string ("File error")); | |
5587 | ||
5588 | Fput (Qfile_already_exists, Qerror_conditions, | |
24b1ddad | 5589 | list3 (Qfile_already_exists, Qfile_error, Qerror)); |
570d7624 JB |
5590 | Fput (Qfile_already_exists, Qerror_message, |
5591 | build_string ("File already exists")); | |
5592 | ||
c0b7b21c | 5593 | Fput (Qfile_date_error, Qerror_conditions, |
24b1ddad | 5594 | list3 (Qfile_date_error, Qfile_error, Qerror)); |
c0b7b21c RS |
5595 | Fput (Qfile_date_error, Qerror_message, |
5596 | build_string ("Cannot set file date")); | |
5597 | ||
199607e4 | 5598 | DEFVAR_LISP ("directory-sep-char", &Vdirectory_sep_char, |
8c1a1077 | 5599 | doc: /* Directory separator character for built-in functions that return file names. |
d57563b6 | 5600 | The value is always ?/. Don't use this variable, just use `/'. */); |
199607e4 | 5601 | |
1d1826db | 5602 | DEFVAR_LISP ("file-name-handler-alist", &Vfile_name_handler_alist, |
8c1a1077 PJ |
5603 | doc: /* *Alist of elements (REGEXP . HANDLER) for file names handled specially. |
5604 | If a file name matches REGEXP, then all I/O on that file is done by calling | |
5605 | HANDLER. | |
5606 | ||
5607 | The first argument given to HANDLER is the name of the I/O primitive | |
5608 | to be handled; the remaining arguments are the arguments that were | |
5609 | passed to that primitive. For example, if you do | |
5610 | (file-exists-p FILENAME) | |
5611 | and FILENAME is handled by HANDLER, then HANDLER is called like this: | |
5612 | (funcall HANDLER 'file-exists-p FILENAME) | |
5613 | The function `find-file-name-handler' checks this list for a handler | |
5614 | for its argument. */); | |
09121adc RS |
5615 | Vfile_name_handler_alist = Qnil; |
5616 | ||
0414b394 KH |
5617 | DEFVAR_LISP ("set-auto-coding-function", |
5618 | &Vset_auto_coding_function, | |
8c1a1077 PJ |
5619 | doc: /* If non-nil, a function to call to decide a coding system of file. |
5620 | Two arguments are passed to this function: the file name | |
5621 | and the length of a file contents following the point. | |
5622 | This function should return a coding system to decode the file contents. | |
5623 | It should check the file name against `auto-coding-alist'. | |
5624 | If no coding system is decided, it should check a coding system | |
5625 | specified in the heading lines with the format: | |
5626 | -*- ... coding: CODING-SYSTEM; ... -*- | |
5627 | or local variable spec of the tailing lines with `coding:' tag. */); | |
0414b394 | 5628 | Vset_auto_coding_function = Qnil; |
c9e82392 | 5629 | |
d6a3cc15 | 5630 | DEFVAR_LISP ("after-insert-file-functions", &Vafter_insert_file_functions, |
8c1a1077 | 5631 | doc: /* A list of functions to be called at the end of `insert-file-contents'. |
0cf9f5b5 RS |
5632 | Each is passed one argument, the number of characters inserted, |
5633 | with point at the start of the inserted text. Each function | |
5634 | should leave point the same, and return the new character count. | |
cf6d2357 RS |
5635 | If `insert-file-contents' is intercepted by a handler from |
5636 | `file-name-handler-alist', that handler is responsible for calling the | |
5637 | functions in `after-insert-file-functions' if appropriate. */); | |
d6a3cc15 RS |
5638 | Vafter_insert_file_functions = Qnil; |
5639 | ||
5640 | DEFVAR_LISP ("write-region-annotate-functions", &Vwrite_region_annotate_functions, | |
8c1a1077 PJ |
5641 | doc: /* A list of functions to be called at the start of `write-region'. |
5642 | Each is passed two arguments, START and END as for `write-region'. | |
5643 | These are usually two numbers but not always; see the documentation | |
5644 | for `write-region'. The function should return a list of pairs | |
5645 | of the form (POSITION . STRING), consisting of strings to be effectively | |
5646 | inserted at the specified positions of the file being written (1 means to | |
5647 | insert before the first byte written). The POSITIONs must be sorted into | |
67fbc0cb CY |
5648 | increasing order. |
5649 | ||
5650 | If there are several annotation functions, the lists returned by these | |
5651 | functions are merged destructively. As each annotation function runs, | |
5652 | the variable `write-region-annotations-so-far' contains a list of all | |
5653 | annotations returned by previous annotation functions. | |
5654 | ||
5655 | An annotation function can return with a different buffer current. | |
5656 | Doing so removes the annotations returned by previous functions, and | |
5657 | resets START and END to `point-min' and `point-max' of the new buffer. | |
5658 | ||
5659 | After `write-region' completes, Emacs calls the function stored in | |
5660 | `write-region-post-annotation-function', once for each buffer that was | |
5661 | current when building the annotations (i.e., at least once), with that | |
5662 | buffer current. */); | |
d6a3cc15 | 5663 | Vwrite_region_annotate_functions = Qnil; |
bd235610 SM |
5664 | staticpro (&Qwrite_region_annotate_functions); |
5665 | Qwrite_region_annotate_functions | |
5666 | = intern ("write-region-annotate-functions"); | |
d6a3cc15 | 5667 | |
67fbc0cb CY |
5668 | DEFVAR_LISP ("write-region-post-annotation-function", |
5669 | &Vwrite_region_post_annotation_function, | |
5670 | doc: /* Function to call after `write-region' completes. | |
5671 | The function is called with no arguments. If one or more of the | |
5672 | annotation functions in `write-region-annotate-functions' changed the | |
5673 | current buffer, the function stored in this variable is called for | |
5674 | each of those additional buffers as well, in addition to the original | |
5675 | buffer. The relevant buffer is current during each function call. */); | |
5676 | Vwrite_region_post_annotation_function = Qnil; | |
5677 | staticpro (&Vwrite_region_annotation_buffers); | |
5678 | ||
6fc6f94b RS |
5679 | DEFVAR_LISP ("write-region-annotations-so-far", |
5680 | &Vwrite_region_annotations_so_far, | |
8c1a1077 PJ |
5681 | doc: /* When an annotation function is called, this holds the previous annotations. |
5682 | These are the annotations made by other annotation functions | |
5683 | that were already called. See also `write-region-annotate-functions'. */); | |
6fc6f94b RS |
5684 | Vwrite_region_annotations_so_far = Qnil; |
5685 | ||
82c2d839 | 5686 | DEFVAR_LISP ("inhibit-file-name-handlers", &Vinhibit_file_name_handlers, |
8c1a1077 PJ |
5687 | doc: /* A list of file name handlers that temporarily should not be used. |
5688 | This applies only to the operation `inhibit-file-name-operation'. */); | |
82c2d839 RS |
5689 | Vinhibit_file_name_handlers = Qnil; |
5690 | ||
a65970a0 | 5691 | DEFVAR_LISP ("inhibit-file-name-operation", &Vinhibit_file_name_operation, |
8c1a1077 | 5692 | doc: /* The operation for which `inhibit-file-name-handlers' is applicable. */); |
a65970a0 RS |
5693 | Vinhibit_file_name_operation = Qnil; |
5694 | ||
e54d3b5d | 5695 | DEFVAR_LISP ("auto-save-list-file-name", &Vauto_save_list_file_name, |
8c1a1077 PJ |
5696 | doc: /* File name in which we write a list of all auto save file names. |
5697 | This variable is initialized automatically from `auto-save-list-file-prefix' | |
5698 | shortly after Emacs reads your `.emacs' file, if you have not yet given it | |
5699 | a non-nil value. */); | |
e54d3b5d RS |
5700 | Vauto_save_list_file_name = Qnil; |
5701 | ||
699b53bc CY |
5702 | DEFVAR_LISP ("auto-save-visited-file-name", &Vauto_save_visited_file_name, |
5703 | doc: /* Non-nil says auto-save a buffer in the file it is visiting, when practical. | |
5704 | Normally auto-save files are written under other names. */); | |
5705 | Vauto_save_visited_file_name = Qnil; | |
5706 | ||
ccf61795 RF |
5707 | #ifdef HAVE_FSYNC |
5708 | DEFVAR_BOOL ("write-region-inhibit-fsync", &write_region_inhibit_fsync, | |
e3f509dd RF |
5709 | doc: /* *Non-nil means don't call fsync in `write-region'. |
5710 | This variable affects calls to `write-region' as well as save commands. | |
5711 | A non-nil value may result in data loss! */); | |
ccf61795 RF |
5712 | write_region_inhibit_fsync = 0; |
5713 | #endif | |
5714 | ||
6cf29fe8 JR |
5715 | DEFVAR_BOOL ("delete-by-moving-to-trash", &delete_by_moving_to_trash, |
5716 | doc: /* Specifies whether to use the system's trash can. | |
5717 | When non-nil, the function `move-file-to-trash' will be used by | |
5718 | `delete-file' and `delete-directory'. */); | |
5719 | delete_by_moving_to_trash = 0; | |
d2b66acf | 5720 | Qdelete_by_moving_to_trash = intern ("delete-by-moving-to-trash"); |
6cf29fe8 JR |
5721 | Qmove_file_to_trash = intern ("move-file-to-trash"); |
5722 | staticpro (&Qmove_file_to_trash); | |
5723 | ||
642ef245 | 5724 | defsubr (&Sfind_file_name_handler); |
570d7624 JB |
5725 | defsubr (&Sfile_name_directory); |
5726 | defsubr (&Sfile_name_nondirectory); | |
642ef245 | 5727 | defsubr (&Sunhandled_file_name_directory); |
570d7624 JB |
5728 | defsubr (&Sfile_name_as_directory); |
5729 | defsubr (&Sdirectory_file_name); | |
5730 | defsubr (&Smake_temp_name); | |
5731 | defsubr (&Sexpand_file_name); | |
5732 | defsubr (&Ssubstitute_in_file_name); | |
5733 | defsubr (&Scopy_file); | |
9bbe01fb | 5734 | defsubr (&Smake_directory_internal); |
aa734e17 | 5735 | defsubr (&Sdelete_directory); |
570d7624 JB |
5736 | defsubr (&Sdelete_file); |
5737 | defsubr (&Srename_file); | |
5738 | defsubr (&Sadd_name_to_file); | |
570d7624 | 5739 | defsubr (&Smake_symbolic_link); |
570d7624 JB |
5740 | defsubr (&Sfile_name_absolute_p); |
5741 | defsubr (&Sfile_exists_p); | |
5742 | defsubr (&Sfile_executable_p); | |
5743 | defsubr (&Sfile_readable_p); | |
5744 | defsubr (&Sfile_writable_p); | |
1f8653eb | 5745 | defsubr (&Saccess_file); |
570d7624 JB |
5746 | defsubr (&Sfile_symlink_p); |
5747 | defsubr (&Sfile_directory_p); | |
b72dea2a | 5748 | defsubr (&Sfile_accessible_directory_p); |
f793dc6c | 5749 | defsubr (&Sfile_regular_p); |
570d7624 JB |
5750 | defsubr (&Sfile_modes); |
5751 | defsubr (&Sset_file_modes); | |
819da85b | 5752 | defsubr (&Sset_file_times); |
c24e9a53 RS |
5753 | defsubr (&Sset_default_file_modes); |
5754 | defsubr (&Sdefault_file_modes); | |
570d7624 JB |
5755 | defsubr (&Sfile_newer_than_file_p); |
5756 | defsubr (&Sinsert_file_contents); | |
5757 | defsubr (&Swrite_region); | |
d6a3cc15 | 5758 | defsubr (&Scar_less_than_car); |
570d7624 JB |
5759 | defsubr (&Sverify_visited_file_modtime); |
5760 | defsubr (&Sclear_visited_file_modtime); | |
f5d5eccf | 5761 | defsubr (&Svisited_file_modtime); |
570d7624 JB |
5762 | defsubr (&Sset_visited_file_modtime); |
5763 | defsubr (&Sdo_auto_save); | |
5764 | defsubr (&Sset_buffer_auto_saved); | |
b60247d9 | 5765 | defsubr (&Sclear_buffer_auto_save_failure); |
570d7624 JB |
5766 | defsubr (&Srecent_auto_save_p); |
5767 | ||
88208bb8 | 5768 | defsubr (&Snext_read_file_uses_dialog_p); |
85ffea93 | 5769 | |
697c17a2 | 5770 | #ifdef HAVE_SYNC |
85ffea93 | 5771 | defsubr (&Sunix_sync); |
483a2e10 | 5772 | #endif |
570d7624 | 5773 | } |
6b61353c KH |
5774 | |
5775 | /* arch-tag: 64ba3fd7-f844-4fb2-ba4b-427eb928786c | |
5776 | (do not change this comment) */ |