Commit | Line | Data |
---|---|---|
570d7624 | 1 | /* File IO for GNU Emacs. |
68c45bf0 | 2 | Copyright (C) 1985,86,87,88,93,94,95,96,97,98,1999 Free Software Foundation, Inc. |
570d7624 JB |
3 | |
4 | This file is part of GNU Emacs. | |
5 | ||
6 | GNU Emacs is free software; you can redistribute it and/or modify | |
7 | it under the terms of the GNU General Public License as published by | |
4746118a | 8 | the Free Software Foundation; either version 2, or (at your option) |
570d7624 JB |
9 | any later version. |
10 | ||
11 | GNU Emacs is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
17 | along with GNU Emacs; see the file COPYING. If not, write to | |
3b7ad313 EN |
18 | the Free Software Foundation, Inc., 59 Temple Place - Suite 330, |
19 | Boston, MA 02111-1307, USA. */ | |
570d7624 | 20 | |
07590973 DL |
21 | #define _GNU_SOURCE /* for euidaccess */ |
22 | ||
18160b98 | 23 | #include <config.h> |
570d7624 | 24 | |
bb369dc6 RS |
25 | #if defined (USG5) || defined (BSD_SYSTEM) || defined (LINUX) |
26 | #include <fcntl.h> | |
27 | #endif | |
28 | ||
1b335d29 | 29 | #include <stdio.h> |
570d7624 JB |
30 | #include <sys/types.h> |
31 | #include <sys/stat.h> | |
bfb61299 | 32 | |
29beb080 RS |
33 | #ifdef HAVE_UNISTD_H |
34 | #include <unistd.h> | |
35 | #endif | |
36 | ||
f73b0ada BF |
37 | #if !defined (S_ISLNK) && defined (S_IFLNK) |
38 | # define S_ISLNK(m) (((m) & S_IFMT) == S_IFLNK) | |
39 | #endif | |
40 | ||
bb369dc6 RS |
41 | #if !defined (S_ISFIFO) && defined (S_IFIFO) |
42 | # define S_ISFIFO(m) (((m) & S_IFMT) == S_IFIFO) | |
43 | #endif | |
44 | ||
f73b0ada BF |
45 | #if !defined (S_ISREG) && defined (S_IFREG) |
46 | # define S_ISREG(m) (((m) & S_IFMT) == S_IFREG) | |
47 | #endif | |
48 | ||
bfb61299 | 49 | #ifdef VMS |
de5bf5d3 | 50 | #include "vms-pwd.h" |
bfb61299 | 51 | #else |
570d7624 | 52 | #include <pwd.h> |
bfb61299 JB |
53 | #endif |
54 | ||
570d7624 | 55 | #include <ctype.h> |
bfb61299 JB |
56 | |
57 | #ifdef VMS | |
3d9f5ce2 | 58 | #include "vmsdir.h" |
bfb61299 JB |
59 | #include <perror.h> |
60 | #include <stddef.h> | |
61 | #include <string.h> | |
bfb61299 JB |
62 | #endif |
63 | ||
570d7624 JB |
64 | #include <errno.h> |
65 | ||
bfb61299 | 66 | #ifndef vax11c |
570d7624 | 67 | extern int errno; |
570d7624 JB |
68 | #endif |
69 | ||
570d7624 JB |
70 | #ifdef APOLLO |
71 | #include <sys/time.h> | |
72 | #endif | |
73 | ||
6e23c83e JB |
74 | #ifndef USG |
75 | #ifndef VMS | |
76 | #ifndef BSD4_1 | |
5e570b75 | 77 | #ifndef WINDOWSNT |
6e23c83e JB |
78 | #define HAVE_FSYNC |
79 | #endif | |
80 | #endif | |
81 | #endif | |
5e570b75 | 82 | #endif |
6e23c83e | 83 | |
570d7624 | 84 | #include "lisp.h" |
8d4e077b | 85 | #include "intervals.h" |
570d7624 | 86 | #include "buffer.h" |
6fdaa9a0 KH |
87 | #include "charset.h" |
88 | #include "coding.h" | |
570d7624 JB |
89 | #include "window.h" |
90 | ||
5e570b75 RS |
91 | #ifdef WINDOWSNT |
92 | #define NOMINMAX 1 | |
93 | #include <windows.h> | |
94 | #include <stdlib.h> | |
95 | #include <fcntl.h> | |
96 | #endif /* not WINDOWSNT */ | |
97 | ||
7990d02a EZ |
98 | #ifdef MSDOS |
99 | #include "msdos.h" | |
100 | #include <sys/param.h> | |
101 | #if __DJGPP__ >= 2 | |
102 | #include <fcntl.h> | |
103 | #include <string.h> | |
104 | #endif | |
105 | #endif | |
106 | ||
199607e4 RS |
107 | #ifdef DOS_NT |
108 | #define CORRECT_DIR_SEPS(s) \ | |
109 | do { if ('/' == DIRECTORY_SEP) dostounix_filename (s); \ | |
110 | else unixtodos_filename (s); \ | |
111 | } while (0) | |
112 | /* On Windows, drive letters must be alphabetic - on DOS, the Netware | |
113 | redirector allows the six letters between 'Z' and 'a' as well. */ | |
114 | #ifdef MSDOS | |
115 | #define IS_DRIVE(x) ((x) >= 'A' && (x) <= 'z') | |
116 | #endif | |
117 | #ifdef WINDOWSNT | |
118 | #define IS_DRIVE(x) isalpha (x) | |
119 | #endif | |
f54b565c MB |
120 | /* Need to lower-case the drive letter, or else expanded |
121 | filenames will sometimes compare inequal, because | |
122 | `expand-file-name' doesn't always down-case the drive letter. */ | |
123 | #define DRIVE_LETTER(x) (tolower (x)) | |
199607e4 RS |
124 | #endif |
125 | ||
570d7624 | 126 | #ifdef VMS |
570d7624 JB |
127 | #include <file.h> |
128 | #include <rmsdef.h> | |
129 | #include <fab.h> | |
130 | #include <nam.h> | |
131 | #endif | |
132 | ||
de5bf5d3 | 133 | #include "systime.h" |
570d7624 JB |
134 | |
135 | #ifdef HPUX | |
136 | #include <netio.h> | |
9b7828a5 | 137 | #ifndef HPUX8 |
47e7b9e5 | 138 | #ifndef HPUX9 |
570d7624 JB |
139 | #include <errnet.h> |
140 | #endif | |
9b7828a5 | 141 | #endif |
47e7b9e5 | 142 | #endif |
570d7624 | 143 | |
9c856db9 GM |
144 | #include "commands.h" |
145 | extern int use_dialog_box; | |
146 | ||
570d7624 JB |
147 | #ifndef O_WRONLY |
148 | #define O_WRONLY 1 | |
149 | #endif | |
150 | ||
4018b5ef RS |
151 | #ifndef O_RDONLY |
152 | #define O_RDONLY 0 | |
153 | #endif | |
154 | ||
8f6df9b5 EZ |
155 | #ifndef S_ISLNK |
156 | # define lstat stat | |
157 | #endif | |
158 | ||
570d7624 JB |
159 | #define min(a, b) ((a) < (b) ? (a) : (b)) |
160 | #define max(a, b) ((a) > (b) ? (a) : (b)) | |
161 | ||
162 | /* Nonzero during writing of auto-save files */ | |
163 | int auto_saving; | |
164 | ||
165 | /* Set by auto_save_1 to mode of original file so Fwrite_region will create | |
166 | a new file with the same mode as the original */ | |
167 | int auto_save_mode_bits; | |
168 | ||
b1d1b865 RS |
169 | /* Coding system for file names, or nil if none. */ |
170 | Lisp_Object Vfile_name_coding_system; | |
171 | ||
cd913586 KH |
172 | /* Coding system for file names used only when |
173 | Vfile_name_coding_system is nil. */ | |
174 | Lisp_Object Vdefault_file_name_coding_system; | |
175 | ||
199607e4 | 176 | /* Alist of elements (REGEXP . HANDLER) for file names |
32f4334d RS |
177 | whose I/O is done with a special handler. */ |
178 | Lisp_Object Vfile_name_handler_alist; | |
179 | ||
0d420e88 BG |
180 | /* Format for auto-save files */ |
181 | Lisp_Object Vauto_save_file_format; | |
182 | ||
183 | /* Lisp functions for translating file formats */ | |
184 | Lisp_Object Qformat_decode, Qformat_annotate_function; | |
185 | ||
c9e82392 | 186 | /* Function to be called to decide a coding system of a reading file. */ |
0414b394 | 187 | Lisp_Object Vset_auto_coding_function; |
c9e82392 | 188 | |
d6a3cc15 RS |
189 | /* Functions to be called to process text properties in inserted file. */ |
190 | Lisp_Object Vafter_insert_file_functions; | |
191 | ||
192 | /* Functions to be called to create text property annotations for file. */ | |
193 | Lisp_Object Vwrite_region_annotate_functions; | |
194 | ||
6fc6f94b RS |
195 | /* During build_annotations, each time an annotation function is called, |
196 | this holds the annotations made by the previous functions. */ | |
197 | Lisp_Object Vwrite_region_annotations_so_far; | |
198 | ||
e54d3b5d RS |
199 | /* File name in which we write a list of all our auto save files. */ |
200 | Lisp_Object Vauto_save_list_file_name; | |
201 | ||
570d7624 JB |
202 | /* Nonzero means, when reading a filename in the minibuffer, |
203 | start out by inserting the default directory into the minibuffer. */ | |
204 | int insert_default_directory; | |
205 | ||
206 | /* On VMS, nonzero means write new files with record format stmlf. | |
207 | Zero means use var format. */ | |
208 | int vms_stmlf_recfm; | |
209 | ||
199607e4 RS |
210 | /* On NT, specifies the directory separator character, used (eg.) when |
211 | expanding file names. This can be bound to / or \. */ | |
212 | Lisp_Object Vdirectory_sep_char; | |
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 JB |
246 | report_file_error (string, data) |
247 | char *string; | |
248 | Lisp_Object data; | |
249 | { | |
250 | Lisp_Object errstring; | |
505ab9bc | 251 | int errorno = errno; |
570d7624 | 252 | |
ca9c0567 | 253 | synchronize_system_messages_locale (); |
68c45bf0 PE |
254 | errstring = code_convert_string_norecord (build_string (strerror (errorno)), |
255 | Vlocale_coding_system, 0); | |
256 | ||
570d7624 | 257 | while (1) |
505ab9bc RS |
258 | switch (errorno) |
259 | { | |
260 | case EEXIST: | |
261 | Fsignal (Qfile_already_exists, Fcons (errstring, data)); | |
262 | break; | |
263 | default: | |
264 | /* System error messages are capitalized. Downcase the initial | |
265 | unless it is followed by a slash. */ | |
266 | if (XSTRING (errstring)->data[1] != '/') | |
267 | XSTRING (errstring)->data[0] = DOWNCASE (XSTRING (errstring)->data[0]); | |
268 | ||
269 | Fsignal (Qfile_error, | |
270 | Fcons (build_string (string), Fcons (errstring, data))); | |
271 | } | |
570d7624 | 272 | } |
b5148e85 | 273 | |
b27a1703 | 274 | Lisp_Object |
b5148e85 RS |
275 | close_file_unwind (fd) |
276 | Lisp_Object fd; | |
277 | { | |
68c45bf0 | 278 | emacs_close (XFASTINT (fd)); |
b27a1703 | 279 | return Qnil; |
b5148e85 | 280 | } |
a1d2b64a RS |
281 | |
282 | /* Restore point, having saved it as a marker. */ | |
283 | ||
ec7adf26 | 284 | static Lisp_Object |
a1d2b64a | 285 | restore_point_unwind (location) |
199607e4 | 286 | Lisp_Object location; |
a1d2b64a | 287 | { |
ec7adf26 | 288 | Fgoto_char (location); |
a1d2b64a | 289 | Fset_marker (location, Qnil, Qnil); |
b27a1703 | 290 | return Qnil; |
a1d2b64a | 291 | } |
570d7624 | 292 | \f |
0bf2eed2 | 293 | Lisp_Object Qexpand_file_name; |
273e0829 | 294 | Lisp_Object Qsubstitute_in_file_name; |
0bf2eed2 RS |
295 | Lisp_Object Qdirectory_file_name; |
296 | Lisp_Object Qfile_name_directory; | |
297 | Lisp_Object Qfile_name_nondirectory; | |
642ef245 | 298 | Lisp_Object Qunhandled_file_name_directory; |
0bf2eed2 | 299 | Lisp_Object Qfile_name_as_directory; |
32f4334d | 300 | Lisp_Object Qcopy_file; |
a6e6e718 | 301 | Lisp_Object Qmake_directory_internal; |
32f4334d RS |
302 | Lisp_Object Qdelete_directory; |
303 | Lisp_Object Qdelete_file; | |
304 | Lisp_Object Qrename_file; | |
305 | Lisp_Object Qadd_name_to_file; | |
306 | Lisp_Object Qmake_symbolic_link; | |
307 | Lisp_Object Qfile_exists_p; | |
308 | Lisp_Object Qfile_executable_p; | |
309 | Lisp_Object Qfile_readable_p; | |
32f4334d | 310 | Lisp_Object Qfile_writable_p; |
1f8653eb RS |
311 | Lisp_Object Qfile_symlink_p; |
312 | Lisp_Object Qaccess_file; | |
32f4334d | 313 | Lisp_Object Qfile_directory_p; |
adedc71d | 314 | Lisp_Object Qfile_regular_p; |
32f4334d RS |
315 | Lisp_Object Qfile_accessible_directory_p; |
316 | Lisp_Object Qfile_modes; | |
317 | Lisp_Object Qset_file_modes; | |
318 | Lisp_Object Qfile_newer_than_file_p; | |
319 | Lisp_Object Qinsert_file_contents; | |
320 | Lisp_Object Qwrite_region; | |
321 | Lisp_Object Qverify_visited_file_modtime; | |
3ec46acd | 322 | Lisp_Object Qset_visited_file_modtime; |
32f4334d | 323 | |
49307295 KH |
324 | DEFUN ("find-file-name-handler", Ffind_file_name_handler, Sfind_file_name_handler, 2, 2, 0, |
325 | "Return FILENAME's handler function for OPERATION, if it has one.\n\ | |
642ef245 JB |
326 | Otherwise, return nil.\n\ |
327 | A file name is handled if one of the regular expressions in\n\ | |
82c2d839 | 328 | `file-name-handler-alist' matches it.\n\n\ |
a65970a0 RS |
329 | If OPERATION equals `inhibit-file-name-operation', then we ignore\n\ |
330 | any handlers that are members of `inhibit-file-name-handlers',\n\ | |
331 | but we still do run any other handlers. This lets handlers\n\ | |
82c2d839 | 332 | use the standard functions without calling themselves recursively.") |
49307295 KH |
333 | (filename, operation) |
334 | Lisp_Object filename, operation; | |
32f4334d | 335 | { |
642ef245 | 336 | /* This function must not munge the match data. */ |
a65970a0 | 337 | Lisp_Object chain, inhibited_handlers; |
642ef245 | 338 | |
e4432095 JB |
339 | CHECK_STRING (filename, 0); |
340 | ||
a65970a0 RS |
341 | if (EQ (operation, Vinhibit_file_name_operation)) |
342 | inhibited_handlers = Vinhibit_file_name_handlers; | |
343 | else | |
344 | inhibited_handlers = Qnil; | |
82c2d839 | 345 | |
93c30b5f | 346 | for (chain = Vfile_name_handler_alist; CONSP (chain); |
03699b14 | 347 | chain = XCDR (chain)) |
32f4334d RS |
348 | { |
349 | Lisp_Object elt; | |
03699b14 | 350 | elt = XCAR (chain); |
93c30b5f | 351 | if (CONSP (elt)) |
32f4334d RS |
352 | { |
353 | Lisp_Object string; | |
03699b14 | 354 | string = XCAR (elt); |
93c30b5f | 355 | if (STRINGP (string) && fast_string_match (string, filename) >= 0) |
a65970a0 RS |
356 | { |
357 | Lisp_Object handler, tem; | |
358 | ||
03699b14 | 359 | handler = XCDR (elt); |
a65970a0 RS |
360 | tem = Fmemq (handler, inhibited_handlers); |
361 | if (NILP (tem)) | |
362 | return handler; | |
363 | } | |
32f4334d | 364 | } |
642ef245 JB |
365 | |
366 | QUIT; | |
32f4334d RS |
367 | } |
368 | return Qnil; | |
369 | } | |
370 | \f | |
570d7624 JB |
371 | DEFUN ("file-name-directory", Ffile_name_directory, Sfile_name_directory, |
372 | 1, 1, 0, | |
3b7f6e60 EN |
373 | "Return the directory component in file name FILENAME.\n\ |
374 | Return nil if FILENAME does not include a directory.\n\ | |
570d7624 JB |
375 | Otherwise return a directory spec.\n\ |
376 | Given a Unix syntax file name, returns a string ending in slash;\n\ | |
377 | on VMS, perhaps instead a string ending in `:', `]' or `>'.") | |
3b7f6e60 EN |
378 | (filename) |
379 | Lisp_Object filename; | |
570d7624 JB |
380 | { |
381 | register unsigned char *beg; | |
382 | register unsigned char *p; | |
0bf2eed2 | 383 | Lisp_Object handler; |
570d7624 | 384 | |
3b7f6e60 | 385 | CHECK_STRING (filename, 0); |
570d7624 | 386 | |
0bf2eed2 RS |
387 | /* If the file name has special constructs in it, |
388 | call the corresponding file handler. */ | |
3b7f6e60 | 389 | handler = Ffind_file_name_handler (filename, Qfile_name_directory); |
0bf2eed2 | 390 | if (!NILP (handler)) |
3b7f6e60 | 391 | return call2 (handler, Qfile_name_directory, filename); |
0bf2eed2 | 392 | |
4c3c22f3 | 393 | #ifdef FILE_SYSTEM_CASE |
3b7f6e60 | 394 | filename = FILE_SYSTEM_CASE (filename); |
4c3c22f3 | 395 | #endif |
3b7f6e60 | 396 | beg = XSTRING (filename)->data; |
199607e4 RS |
397 | #ifdef DOS_NT |
398 | beg = strcpy (alloca (strlen (beg) + 1), beg); | |
399 | #endif | |
fc932ac6 | 400 | p = beg + STRING_BYTES (XSTRING (filename)); |
570d7624 | 401 | |
199607e4 | 402 | while (p != beg && !IS_DIRECTORY_SEP (p[-1]) |
570d7624 JB |
403 | #ifdef VMS |
404 | && p[-1] != ':' && p[-1] != ']' && p[-1] != '>' | |
405 | #endif /* VMS */ | |
199607e4 | 406 | #ifdef DOS_NT |
ba14e174 RS |
407 | /* only recognise drive specifier at the beginning */ |
408 | && !(p[-1] == ':' | |
409 | /* handle the "/:d:foo" and "/:foo" cases correctly */ | |
410 | && ((p == beg + 2 && !IS_DIRECTORY_SEP (*beg)) | |
411 | || (p == beg + 4 && IS_DIRECTORY_SEP (*beg)))) | |
199607e4 | 412 | #endif |
570d7624 JB |
413 | ) p--; |
414 | ||
415 | if (p == beg) | |
416 | return Qnil; | |
5e570b75 | 417 | #ifdef DOS_NT |
4c3c22f3 | 418 | /* Expansion of "c:" to drive and default directory. */ |
ba14e174 | 419 | if (p[-1] == ':') |
4c3c22f3 | 420 | { |
4c3c22f3 | 421 | /* MAXPATHLEN+1 is guaranteed to be enough space for getdefdir. */ |
199607e4 | 422 | unsigned char *res = alloca (MAXPATHLEN + 1); |
ba14e174 RS |
423 | unsigned char *r = res; |
424 | ||
425 | if (p == beg + 4 && IS_DIRECTORY_SEP (*beg) && beg[1] == ':') | |
426 | { | |
427 | strncpy (res, beg, 2); | |
428 | beg += 2; | |
429 | r += 2; | |
430 | } | |
431 | ||
432 | if (getdefdir (toupper (*beg) - 'A' + 1, r)) | |
4c3c22f3 | 433 | { |
199607e4 | 434 | if (!IS_DIRECTORY_SEP (res[strlen (res) - 1])) |
4c3c22f3 RS |
435 | strcat (res, "/"); |
436 | beg = res; | |
437 | p = beg + strlen (beg); | |
438 | } | |
439 | } | |
199607e4 | 440 | CORRECT_DIR_SEPS (beg); |
5e570b75 | 441 | #endif /* DOS_NT */ |
60d67b83 RS |
442 | |
443 | if (STRING_MULTIBYTE (filename)) | |
444 | return make_string (beg, p - beg); | |
445 | return make_unibyte_string (beg, p - beg); | |
570d7624 JB |
446 | } |
447 | ||
60d67b83 RS |
448 | DEFUN ("file-name-nondirectory", Ffile_name_nondirectory, |
449 | Sfile_name_nondirectory, 1, 1, 0, | |
3b7f6e60 | 450 | "Return file name FILENAME sans its directory.\n\ |
570d7624 JB |
451 | For example, in a Unix-syntax file name,\n\ |
452 | this is everything after the last slash,\n\ | |
453 | or the entire name if it contains no slash.") | |
3b7f6e60 EN |
454 | (filename) |
455 | Lisp_Object filename; | |
570d7624 JB |
456 | { |
457 | register unsigned char *beg, *p, *end; | |
0bf2eed2 | 458 | Lisp_Object handler; |
570d7624 | 459 | |
3b7f6e60 | 460 | CHECK_STRING (filename, 0); |
570d7624 | 461 | |
0bf2eed2 RS |
462 | /* If the file name has special constructs in it, |
463 | call the corresponding file handler. */ | |
3b7f6e60 | 464 | handler = Ffind_file_name_handler (filename, Qfile_name_nondirectory); |
0bf2eed2 | 465 | if (!NILP (handler)) |
3b7f6e60 | 466 | return call2 (handler, Qfile_name_nondirectory, filename); |
0bf2eed2 | 467 | |
3b7f6e60 | 468 | beg = XSTRING (filename)->data; |
fc932ac6 | 469 | end = p = beg + STRING_BYTES (XSTRING (filename)); |
570d7624 | 470 | |
199607e4 | 471 | while (p != beg && !IS_DIRECTORY_SEP (p[-1]) |
570d7624 JB |
472 | #ifdef VMS |
473 | && p[-1] != ':' && p[-1] != ']' && p[-1] != '>' | |
474 | #endif /* VMS */ | |
199607e4 RS |
475 | #ifdef DOS_NT |
476 | /* only recognise drive specifier at beginning */ | |
ba14e174 RS |
477 | && !(p[-1] == ':' |
478 | /* handle the "/:d:foo" case correctly */ | |
479 | && (p == beg + 2 || (p == beg + 4 && IS_DIRECTORY_SEP (*beg)))) | |
199607e4 | 480 | #endif |
60d67b83 RS |
481 | ) |
482 | p--; | |
570d7624 | 483 | |
60d67b83 RS |
484 | if (STRING_MULTIBYTE (filename)) |
485 | return make_string (p, end - p); | |
486 | return make_unibyte_string (p, end - p); | |
570d7624 | 487 | } |
642ef245 | 488 | |
60d67b83 RS |
489 | DEFUN ("unhandled-file-name-directory", Funhandled_file_name_directory, |
490 | Sunhandled_file_name_directory, 1, 1, 0, | |
642ef245 JB |
491 | "Return a directly usable directory name somehow associated with FILENAME.\n\ |
492 | A `directly usable' directory name is one that may be used without the\n\ | |
493 | intervention of any file handler.\n\ | |
494 | If FILENAME is a directly usable file itself, return\n\ | |
ec7adf26 | 495 | \(file-name-directory FILENAME).\n\ |
642ef245 JB |
496 | The `call-process' and `start-process' functions use this function to\n\ |
497 | get a current directory to run processes in.") | |
498 | (filename) | |
499 | Lisp_Object filename; | |
500 | { | |
501 | Lisp_Object handler; | |
502 | ||
503 | /* If the file name has special constructs in it, | |
504 | call the corresponding file handler. */ | |
49307295 | 505 | handler = Ffind_file_name_handler (filename, Qunhandled_file_name_directory); |
642ef245 JB |
506 | if (!NILP (handler)) |
507 | return call2 (handler, Qunhandled_file_name_directory, filename); | |
508 | ||
509 | return Ffile_name_directory (filename); | |
510 | } | |
511 | ||
570d7624 JB |
512 | \f |
513 | char * | |
514 | file_name_as_directory (out, in) | |
515 | char *out, *in; | |
516 | { | |
517 | int size = strlen (in) - 1; | |
518 | ||
519 | strcpy (out, in); | |
520 | ||
8aa3a244 RS |
521 | if (size < 0) |
522 | { | |
154a307d KH |
523 | out[0] = '.'; |
524 | out[1] = '/'; | |
525 | out[2] = 0; | |
8aa3a244 RS |
526 | return out; |
527 | } | |
528 | ||
570d7624 JB |
529 | #ifdef VMS |
530 | /* Is it already a directory string? */ | |
531 | if (in[size] == ':' || in[size] == ']' || in[size] == '>') | |
532 | return out; | |
533 | /* Is it a VMS directory file name? If so, hack VMS syntax. */ | |
534 | else if (! index (in, '/') | |
535 | && ((size > 3 && ! strcmp (&in[size - 3], ".DIR")) | |
536 | || (size > 3 && ! strcmp (&in[size - 3], ".dir")) | |
537 | || (size > 5 && (! strncmp (&in[size - 5], ".DIR", 4) | |
538 | || ! strncmp (&in[size - 5], ".dir", 4)) | |
539 | && (in[size - 1] == '.' || in[size - 1] == ';') | |
540 | && in[size] == '1'))) | |
541 | { | |
542 | register char *p, *dot; | |
543 | char brack; | |
544 | ||
545 | /* x.dir -> [.x] | |
546 | dir:x.dir --> dir:[x] | |
547 | dir:[x]y.dir --> dir:[x.y] */ | |
548 | p = in + size; | |
549 | while (p != in && *p != ':' && *p != '>' && *p != ']') p--; | |
550 | if (p != in) | |
551 | { | |
552 | strncpy (out, in, p - in); | |
553 | out[p - in] = '\0'; | |
554 | if (*p == ':') | |
555 | { | |
556 | brack = ']'; | |
557 | strcat (out, ":["); | |
558 | } | |
559 | else | |
560 | { | |
561 | brack = *p; | |
562 | strcat (out, "."); | |
563 | } | |
564 | p++; | |
565 | } | |
566 | else | |
567 | { | |
568 | brack = ']'; | |
569 | strcpy (out, "[."); | |
570 | } | |
bfb61299 JB |
571 | dot = index (p, '.'); |
572 | if (dot) | |
570d7624 JB |
573 | { |
574 | /* blindly remove any extension */ | |
575 | size = strlen (out) + (dot - p); | |
576 | strncat (out, p, dot - p); | |
577 | } | |
578 | else | |
579 | { | |
580 | strcat (out, p); | |
581 | size = strlen (out); | |
582 | } | |
583 | out[size++] = brack; | |
584 | out[size] = '\0'; | |
585 | } | |
586 | #else /* not VMS */ | |
587 | /* For Unix syntax, Append a slash if necessary */ | |
199607e4 | 588 | if (!IS_DIRECTORY_SEP (out[size])) |
5e570b75 RS |
589 | { |
590 | out[size + 1] = DIRECTORY_SEP; | |
591 | out[size + 2] = '\0'; | |
592 | } | |
199607e4 RS |
593 | #ifdef DOS_NT |
594 | CORRECT_DIR_SEPS (out); | |
595 | #endif | |
570d7624 JB |
596 | #endif /* not VMS */ |
597 | return out; | |
598 | } | |
599 | ||
600 | DEFUN ("file-name-as-directory", Ffile_name_as_directory, | |
601 | Sfile_name_as_directory, 1, 1, 0, | |
602 | "Return a string representing file FILENAME interpreted as a directory.\n\ | |
603 | This operation exists because a directory is also a file, but its name as\n\ | |
604 | a directory is different from its name as a file.\n\ | |
605 | The result can be used as the value of `default-directory'\n\ | |
606 | or passed as second argument to `expand-file-name'.\n\ | |
607 | For a Unix-syntax file name, just appends a slash.\n\ | |
608 | On VMS, converts \"[X]FOO.DIR\" to \"[X.FOO]\", etc.") | |
609 | (file) | |
610 | Lisp_Object file; | |
611 | { | |
612 | char *buf; | |
0bf2eed2 | 613 | Lisp_Object handler; |
570d7624 JB |
614 | |
615 | CHECK_STRING (file, 0); | |
265a9e55 | 616 | if (NILP (file)) |
570d7624 | 617 | return Qnil; |
0bf2eed2 RS |
618 | |
619 | /* If the file name has special constructs in it, | |
620 | call the corresponding file handler. */ | |
49307295 | 621 | handler = Ffind_file_name_handler (file, Qfile_name_as_directory); |
0bf2eed2 RS |
622 | if (!NILP (handler)) |
623 | return call2 (handler, Qfile_name_as_directory, file); | |
624 | ||
fc932ac6 | 625 | buf = (char *) alloca (STRING_BYTES (XSTRING (file)) + 10); |
570d7624 JB |
626 | return build_string (file_name_as_directory (buf, XSTRING (file)->data)); |
627 | } | |
628 | \f | |
629 | /* | |
630 | * Convert from directory name to filename. | |
631 | * On VMS: | |
632 | * xyzzy:[mukesh.emacs] => xyzzy:[mukesh]emacs.dir.1 | |
633 | * xyzzy:[mukesh] => xyzzy:[000000]mukesh.dir.1 | |
199607e4 | 634 | * On UNIX, it's simple: just make sure there isn't a terminating / |
570d7624 JB |
635 | |
636 | * Value is nonzero if the string output is different from the input. | |
637 | */ | |
638 | ||
dfcf069d | 639 | int |
570d7624 JB |
640 | directory_file_name (src, dst) |
641 | char *src, *dst; | |
642 | { | |
643 | long slen; | |
644 | #ifdef VMS | |
645 | long rlen; | |
646 | char * ptr, * rptr; | |
647 | char bracket; | |
648 | struct FAB fab = cc$rms_fab; | |
649 | struct NAM nam = cc$rms_nam; | |
650 | char esa[NAM$C_MAXRSS]; | |
651 | #endif /* VMS */ | |
652 | ||
653 | slen = strlen (src); | |
654 | #ifdef VMS | |
655 | if (! index (src, '/') | |
656 | && (src[slen - 1] == ']' | |
657 | || src[slen - 1] == ':' | |
658 | || src[slen - 1] == '>')) | |
659 | { | |
660 | /* VMS style - convert [x.y.z] to [x.y]z, [x] to [000000]x */ | |
661 | fab.fab$l_fna = src; | |
662 | fab.fab$b_fns = slen; | |
663 | fab.fab$l_nam = &nam; | |
664 | fab.fab$l_fop = FAB$M_NAM; | |
665 | ||
666 | nam.nam$l_esa = esa; | |
667 | nam.nam$b_ess = sizeof esa; | |
668 | nam.nam$b_nop |= NAM$M_SYNCHK; | |
669 | ||
670 | /* We call SYS$PARSE to handle such things as [--] for us. */ | |
199607e4 | 671 | if (SYS$PARSE (&fab, 0, 0) == RMS$_NORMAL) |
570d7624 JB |
672 | { |
673 | slen = nam.nam$b_esl; | |
674 | if (esa[slen - 1] == ';' && esa[slen - 2] == '.') | |
675 | slen -= 2; | |
676 | esa[slen] = '\0'; | |
677 | src = esa; | |
678 | } | |
679 | if (src[slen - 1] != ']' && src[slen - 1] != '>') | |
680 | { | |
681 | /* what about when we have logical_name:???? */ | |
682 | if (src[slen - 1] == ':') | |
5e570b75 | 683 | { /* Xlate logical name and see what we get */ |
570d7624 JB |
684 | ptr = strcpy (dst, src); /* upper case for getenv */ |
685 | while (*ptr) | |
686 | { | |
687 | if ('a' <= *ptr && *ptr <= 'z') | |
688 | *ptr -= 040; | |
689 | ptr++; | |
690 | } | |
5e570b75 | 691 | dst[slen - 1] = 0; /* remove colon */ |
570d7624 JB |
692 | if (!(src = egetenv (dst))) |
693 | return 0; | |
694 | /* should we jump to the beginning of this procedure? | |
695 | Good points: allows us to use logical names that xlate | |
696 | to Unix names, | |
697 | Bad points: can be a problem if we just translated to a device | |
698 | name... | |
699 | For now, I'll punt and always expect VMS names, and hope for | |
700 | the best! */ | |
701 | slen = strlen (src); | |
702 | if (src[slen - 1] != ']' && src[slen - 1] != '>') | |
703 | { /* no recursion here! */ | |
704 | strcpy (dst, src); | |
705 | return 0; | |
706 | } | |
707 | } | |
708 | else | |
5e570b75 | 709 | { /* not a directory spec */ |
570d7624 JB |
710 | strcpy (dst, src); |
711 | return 0; | |
712 | } | |
713 | } | |
714 | bracket = src[slen - 1]; | |
715 | ||
716 | /* If bracket is ']' or '>', bracket - 2 is the corresponding | |
717 | opening bracket. */ | |
bfb61299 JB |
718 | ptr = index (src, bracket - 2); |
719 | if (ptr == 0) | |
570d7624 JB |
720 | { /* no opening bracket */ |
721 | strcpy (dst, src); | |
722 | return 0; | |
723 | } | |
724 | if (!(rptr = rindex (src, '.'))) | |
725 | rptr = ptr; | |
726 | slen = rptr - src; | |
727 | strncpy (dst, src, slen); | |
728 | dst[slen] = '\0'; | |
729 | if (*rptr == '.') | |
730 | { | |
731 | dst[slen++] = bracket; | |
732 | dst[slen] = '\0'; | |
733 | } | |
734 | else | |
735 | { | |
736 | /* If we have the top-level of a rooted directory (i.e. xx:[000000]), | |
737 | then translate the device and recurse. */ | |
738 | if (dst[slen - 1] == ':' | |
5e570b75 | 739 | && dst[slen - 2] != ':' /* skip decnet nodes */ |
199607e4 | 740 | && strcmp (src + slen, "[000000]") == 0) |
570d7624 JB |
741 | { |
742 | dst[slen - 1] = '\0'; | |
743 | if ((ptr = egetenv (dst)) | |
744 | && (rlen = strlen (ptr) - 1) > 0 | |
745 | && (ptr[rlen] == ']' || ptr[rlen] == '>') | |
746 | && ptr[rlen - 1] == '.') | |
747 | { | |
72b21817 RS |
748 | char * buf = (char *) alloca (strlen (ptr) + 1); |
749 | strcpy (buf, ptr); | |
750 | buf[rlen - 1] = ']'; | |
751 | buf[rlen] = '\0'; | |
752 | return directory_file_name (buf, dst); | |
570d7624 JB |
753 | } |
754 | else | |
755 | dst[slen - 1] = ':'; | |
756 | } | |
757 | strcat (dst, "[000000]"); | |
758 | slen += 8; | |
759 | } | |
760 | rptr++; | |
761 | rlen = strlen (rptr) - 1; | |
762 | strncat (dst, rptr, rlen); | |
763 | dst[slen + rlen] = '\0'; | |
764 | strcat (dst, ".DIR.1"); | |
765 | return 1; | |
766 | } | |
767 | #endif /* VMS */ | |
768 | /* Process as Unix format: just remove any final slash. | |
769 | But leave "/" unchanged; do not change it to "". */ | |
770 | strcpy (dst, src); | |
125feee8 RS |
771 | #ifdef APOLLO |
772 | /* Handle // as root for apollo's. */ | |
773 | if ((slen > 2 && dst[slen - 1] == '/') | |
774 | || (slen > 1 && dst[0] != '/' && dst[slen - 1] == '/')) | |
775 | dst[slen - 1] = 0; | |
776 | #else | |
199607e4 | 777 | if (slen > 1 |
5e570b75 | 778 | && IS_DIRECTORY_SEP (dst[slen - 1]) |
4592782e RS |
779 | #ifdef DOS_NT |
780 | && !IS_ANY_SEP (dst[slen - 2]) | |
781 | #endif | |
782 | ) | |
570d7624 | 783 | dst[slen - 1] = 0; |
199607e4 RS |
784 | #endif |
785 | #ifdef DOS_NT | |
786 | CORRECT_DIR_SEPS (dst); | |
125feee8 | 787 | #endif |
570d7624 JB |
788 | return 1; |
789 | } | |
790 | ||
791 | DEFUN ("directory-file-name", Fdirectory_file_name, Sdirectory_file_name, | |
792 | 1, 1, 0, | |
3b7f6e60 EN |
793 | "Returns the file name of the directory named DIRECTORY.\n\ |
794 | This is the name of the file that holds the data for the directory DIRECTORY.\n\ | |
570d7624 JB |
795 | This operation exists because a directory is also a file, but its name as\n\ |
796 | a directory is different from its name as a file.\n\ | |
797 | In Unix-syntax, this function just removes the final slash.\n\ | |
798 | On VMS, given a VMS-syntax directory name such as \"[X.Y]\",\n\ | |
799 | it returns a file name such as \"[X]Y.DIR.1\".") | |
800 | (directory) | |
801 | Lisp_Object directory; | |
802 | { | |
803 | char *buf; | |
0bf2eed2 | 804 | Lisp_Object handler; |
570d7624 JB |
805 | |
806 | CHECK_STRING (directory, 0); | |
807 | ||
265a9e55 | 808 | if (NILP (directory)) |
570d7624 | 809 | return Qnil; |
0bf2eed2 RS |
810 | |
811 | /* If the file name has special constructs in it, | |
812 | call the corresponding file handler. */ | |
49307295 | 813 | handler = Ffind_file_name_handler (directory, Qdirectory_file_name); |
0bf2eed2 RS |
814 | if (!NILP (handler)) |
815 | return call2 (handler, Qdirectory_file_name, directory); | |
816 | ||
570d7624 JB |
817 | #ifdef VMS |
818 | /* 20 extra chars is insufficient for VMS, since we might perform a | |
819 | logical name translation. an equivalence string can be up to 255 | |
820 | chars long, so grab that much extra space... - sss */ | |
fc932ac6 | 821 | buf = (char *) alloca (STRING_BYTES (XSTRING (directory)) + 20 + 255); |
570d7624 | 822 | #else |
fc932ac6 | 823 | buf = (char *) alloca (STRING_BYTES (XSTRING (directory)) + 20); |
570d7624 JB |
824 | #endif |
825 | directory_file_name (XSTRING (directory)->data, buf); | |
826 | return build_string (buf); | |
827 | } | |
828 | ||
3ce839e4 RS |
829 | static char make_temp_name_tbl[64] = |
830 | { | |
831 | 'A','B','C','D','E','F','G','H', | |
832 | 'I','J','K','L','M','N','O','P', | |
833 | 'Q','R','S','T','U','V','W','X', | |
834 | 'Y','Z','a','b','c','d','e','f', | |
835 | 'g','h','i','j','k','l','m','n', | |
836 | 'o','p','q','r','s','t','u','v', | |
837 | 'w','x','y','z','0','1','2','3', | |
838 | '4','5','6','7','8','9','-','_' | |
839 | }; | |
840 | static unsigned make_temp_name_count, make_temp_name_count_initialized_p; | |
841 | ||
570d7624 JB |
842 | DEFUN ("make-temp-name", Fmake_temp_name, Smake_temp_name, 1, 1, 0, |
843 | "Generate temporary file name (string) starting with PREFIX (a string).\n\ | |
844 | The Emacs process number forms part of the result,\n\ | |
41886f35 | 845 | so there is no danger of generating a name being used by another process.\n\ |
3ce839e4 | 846 | \n\ |
41886f35 | 847 | In addition, this function makes an attempt to choose a name\n\ |
3ce839e4 | 848 | which has no existing file. To make this work,\n\ |
a1f973fb SM |
849 | PREFIX should be an absolute file name.\n\ |
850 | \n\ | |
9acbdbcb SM |
851 | There is a race condition between calling `make-temp-name' and creating the\n\ |
852 | file which opens all kinds of security holes. For that reason, you should\n\ | |
a1f973fb | 853 | probably use `make-temp-file' instead.") |
570d7624 JB |
854 | (prefix) |
855 | Lisp_Object prefix; | |
856 | { | |
857 | Lisp_Object val; | |
3ce839e4 RS |
858 | int len; |
859 | int pid; | |
860 | unsigned char *p, *data; | |
861 | char pidbuf[20]; | |
862 | int pidlen; | |
863 | ||
864 | CHECK_STRING (prefix, 0); | |
865 | ||
866 | /* VAL is created by adding 6 characters to PREFIX. The first | |
867 | three are the PID of this process, in base 64, and the second | |
868 | three are incremented if the file already exists. This ensures | |
869 | 262144 unique file names per PID per PREFIX. */ | |
870 | ||
871 | pid = (int) getpid (); | |
872 | ||
873 | #ifdef HAVE_LONG_FILE_NAMES | |
874 | sprintf (pidbuf, "%d", pid); | |
875 | pidlen = strlen (pidbuf); | |
3a3bfb18 | 876 | #else |
3ce839e4 RS |
877 | pidbuf[0] = make_temp_name_tbl[pid & 63], pid >>= 6; |
878 | pidbuf[1] = make_temp_name_tbl[pid & 63], pid >>= 6; | |
879 | pidbuf[2] = make_temp_name_tbl[pid & 63], pid >>= 6; | |
880 | pidlen = 3; | |
881 | #endif | |
882 | ||
883 | len = XSTRING (prefix)->size; | |
884 | val = make_uninit_string (len + 3 + pidlen); | |
885 | data = XSTRING (val)->data; | |
886 | bcopy(XSTRING (prefix)->data, data, len); | |
887 | p = data + len; | |
888 | ||
889 | bcopy (pidbuf, p, pidlen); | |
890 | p += pidlen; | |
891 | ||
892 | /* Here we try to minimize useless stat'ing when this function is | |
893 | invoked many times successively with the same PREFIX. We achieve | |
894 | this by initializing count to a random value, and incrementing it | |
f6a492a9 RS |
895 | afterwards. |
896 | ||
897 | We don't want make-temp-name to be called while dumping, | |
898 | because then make_temp_name_count_initialized_p would get set | |
899 | and then make_temp_name_count would not be set when Emacs starts. */ | |
900 | ||
3ce839e4 RS |
901 | if (!make_temp_name_count_initialized_p) |
902 | { | |
903 | make_temp_name_count = (unsigned) time (NULL); | |
904 | make_temp_name_count_initialized_p = 1; | |
905 | } | |
906 | ||
907 | while (1) | |
908 | { | |
909 | struct stat ignored; | |
8a7777fc | 910 | unsigned num = make_temp_name_count; |
3ce839e4 RS |
911 | |
912 | p[0] = make_temp_name_tbl[num & 63], num >>= 6; | |
913 | p[1] = make_temp_name_tbl[num & 63], num >>= 6; | |
914 | p[2] = make_temp_name_tbl[num & 63], num >>= 6; | |
915 | ||
8a7777fc RS |
916 | /* Poor man's congruential RN generator. Replace with |
917 | ++make_temp_name_count for debugging. */ | |
918 | make_temp_name_count += 25229; | |
919 | make_temp_name_count %= 225307; | |
920 | ||
3ce839e4 RS |
921 | if (stat (data, &ignored) < 0) |
922 | { | |
923 | /* We want to return only if errno is ENOENT. */ | |
924 | if (errno == ENOENT) | |
925 | return val; | |
926 | else | |
927 | /* The error here is dubious, but there is little else we | |
928 | can do. The alternatives are to return nil, which is | |
929 | as bad as (and in many cases worse than) throwing the | |
930 | error, or to ignore the error, which will likely result | |
8a7777fc RS |
931 | in looping through 225307 stat's, which is not only |
932 | dog-slow, but also useless since it will fallback to | |
933 | the errow below, anyway. */ | |
3ce839e4 RS |
934 | report_file_error ("Cannot create temporary name for prefix `%s'", |
935 | Fcons (prefix, Qnil)); | |
936 | /* not reached */ | |
937 | } | |
938 | } | |
939 | ||
940 | error ("Cannot create temporary name for prefix `%s'", | |
941 | XSTRING (prefix)->data); | |
942 | return Qnil; | |
570d7624 | 943 | } |
3ce839e4 | 944 | |
570d7624 JB |
945 | \f |
946 | DEFUN ("expand-file-name", Fexpand_file_name, Sexpand_file_name, 1, 2, 0, | |
3b7f6e60 EN |
947 | "Convert filename NAME to absolute, and canonicalize it.\n\ |
948 | Second arg DEFAULT-DIRECTORY is directory to start with if NAME is relative\n\ | |
949 | (does not start with slash); if DEFAULT-DIRECTORY is nil or missing,\n\ | |
570d7624 | 950 | the current buffer's value of default-directory is used.\n\ |
199607e4 RS |
951 | File name components that are `.' are removed, and \n\ |
952 | so are file name components followed by `..', along with the `..' itself;\n\ | |
b72dea2a | 953 | note that these simplifications are done without checking the resulting\n\ |
199607e4 | 954 | file names in the file system.\n\ |
b72dea2a JB |
955 | An initial `~/' expands to your home directory.\n\ |
956 | An initial `~USER/' expands to USER's home directory.\n\ | |
570d7624 | 957 | See also the function `substitute-in-file-name'.") |
82330e7f | 958 | (name, default_directory) |
3b7f6e60 | 959 | Lisp_Object name, default_directory; |
570d7624 JB |
960 | { |
961 | unsigned char *nm; | |
199607e4 | 962 | |
570d7624 JB |
963 | register unsigned char *newdir, *p, *o; |
964 | int tlen; | |
965 | unsigned char *target; | |
966 | struct passwd *pw; | |
570d7624 JB |
967 | #ifdef VMS |
968 | unsigned char * colon = 0; | |
969 | unsigned char * close = 0; | |
970 | unsigned char * slash = 0; | |
971 | unsigned char * brack = 0; | |
972 | int lbrack = 0, rbrack = 0; | |
973 | int dots = 0; | |
974 | #endif /* VMS */ | |
5e570b75 | 975 | #ifdef DOS_NT |
199607e4 | 976 | int drive = 0; |
9a1dc3be | 977 | int collapse_newdir = 1; |
f0f95d31 | 978 | int is_escaped = 0; |
5e570b75 | 979 | #endif /* DOS_NT */ |
199607e4 | 980 | int length; |
0bf2eed2 | 981 | Lisp_Object handler; |
199607e4 | 982 | |
570d7624 JB |
983 | CHECK_STRING (name, 0); |
984 | ||
0bf2eed2 RS |
985 | /* If the file name has special constructs in it, |
986 | call the corresponding file handler. */ | |
49307295 | 987 | handler = Ffind_file_name_handler (name, Qexpand_file_name); |
0bf2eed2 | 988 | if (!NILP (handler)) |
3b7f6e60 | 989 | return call3 (handler, Qexpand_file_name, name, default_directory); |
58fc9587 | 990 | |
3b7f6e60 EN |
991 | /* Use the buffer's default-directory if DEFAULT_DIRECTORY is omitted. */ |
992 | if (NILP (default_directory)) | |
993 | default_directory = current_buffer->directory; | |
82330e7f RS |
994 | if (! STRINGP (default_directory)) |
995 | default_directory = build_string ("/"); | |
58fc9587 | 996 | |
3b7f6e60 | 997 | if (!NILP (default_directory)) |
273e0829 | 998 | { |
3b7f6e60 | 999 | handler = Ffind_file_name_handler (default_directory, Qexpand_file_name); |
273e0829 | 1000 | if (!NILP (handler)) |
3b7f6e60 | 1001 | return call3 (handler, Qexpand_file_name, name, default_directory); |
273e0829 | 1002 | } |
0bf2eed2 | 1003 | |
3b7f6e60 | 1004 | o = XSTRING (default_directory)->data; |
5e570b75 | 1005 | |
3b7f6e60 | 1006 | /* Make sure DEFAULT_DIRECTORY is properly expanded. |
f14b1c68 | 1007 | It would be better to do this down below where we actually use |
3b7f6e60 | 1008 | default_directory. Unfortunately, calling Fexpand_file_name recursively |
f14b1c68 JB |
1009 | could invoke GC, and the strings might be relocated. This would |
1010 | be annoying because we have pointers into strings lying around | |
1011 | that would need adjusting, and people would add new pointers to | |
1012 | the code and forget to adjust them, resulting in intermittent bugs. | |
4ad827c5 RS |
1013 | Putting this call here avoids all that crud. |
1014 | ||
1015 | The EQ test avoids infinite recursion. */ | |
3b7f6e60 | 1016 | if (! NILP (default_directory) && !EQ (default_directory, name) |
199607e4 RS |
1017 | /* Save time in some common cases - as long as default_directory |
1018 | is not relative, it can be canonicalized with name below (if it | |
1019 | is needed at all) without requiring it to be expanded now. */ | |
01937013 | 1020 | #ifdef DOS_NT |
199607e4 | 1021 | /* Detect MSDOS file names with drive specifiers. */ |
f0f95d31 | 1022 | && ! (IS_DRIVE (o[0]) && IS_DEVICE_SEP (o[1]) && IS_DIRECTORY_SEP (o[2])) |
199607e4 RS |
1023 | #ifdef WINDOWSNT |
1024 | /* Detect Windows file names in UNC format. */ | |
1025 | && ! (IS_DIRECTORY_SEP (o[0]) && IS_DIRECTORY_SEP (o[1])) | |
01937013 | 1026 | #endif |
199607e4 RS |
1027 | #else /* not DOS_NT */ |
1028 | /* Detect Unix absolute file names (/... alone is not absolute on | |
1029 | DOS or Windows). */ | |
1030 | && ! (IS_DIRECTORY_SEP (o[0])) | |
1031 | #endif /* not DOS_NT */ | |
1032 | ) | |
f14b1c68 JB |
1033 | { |
1034 | struct gcpro gcpro1; | |
1035 | ||
1036 | GCPRO1 (name); | |
3b7f6e60 | 1037 | default_directory = Fexpand_file_name (default_directory, Qnil); |
f14b1c68 JB |
1038 | UNGCPRO; |
1039 | } | |
1040 | ||
570d7624 JB |
1041 | #ifdef VMS |
1042 | /* Filenames on VMS are always upper case. */ | |
1043 | name = Fupcase (name); | |
1044 | #endif | |
4c3c22f3 RS |
1045 | #ifdef FILE_SYSTEM_CASE |
1046 | name = FILE_SYSTEM_CASE (name); | |
1047 | #endif | |
570d7624 JB |
1048 | |
1049 | nm = XSTRING (name)->data; | |
a5a1cc06 | 1050 | |
5e570b75 | 1051 | #ifdef DOS_NT |
199607e4 RS |
1052 | /* We will force directory separators to be either all \ or /, so make |
1053 | a local copy to modify, even if there ends up being no change. */ | |
1054 | nm = strcpy (alloca (strlen (nm) + 1), nm); | |
1055 | ||
f0f95d31 RS |
1056 | /* Note if special escape prefix is present, but remove for now. */ |
1057 | if (nm[0] == '/' && nm[1] == ':') | |
1058 | { | |
1059 | is_escaped = 1; | |
1060 | nm += 2; | |
1061 | } | |
1062 | ||
199607e4 | 1063 | /* Find and remove drive specifier if present; this makes nm absolute |
f0f95d31 RS |
1064 | even if the rest of the name appears to be relative. Only look for |
1065 | drive specifier at the beginning. */ | |
1066 | if (IS_DRIVE (nm[0]) && IS_DEVICE_SEP (nm[1])) | |
1067 | { | |
1068 | drive = nm[0]; | |
1069 | nm += 2; | |
1070 | } | |
bb1ff1f4 GV |
1071 | |
1072 | #ifdef WINDOWSNT | |
1073 | /* If we see "c://somedir", we want to strip the first slash after the | |
1074 | colon when stripping the drive letter. Otherwise, this expands to | |
1075 | "//somedir". */ | |
1076 | if (drive && IS_DIRECTORY_SEP (nm[0]) && IS_DIRECTORY_SEP (nm[1])) | |
1077 | nm++; | |
1078 | #endif /* WINDOWSNT */ | |
5e570b75 | 1079 | #endif /* DOS_NT */ |
4c3c22f3 | 1080 | |
199607e4 RS |
1081 | #ifdef WINDOWSNT |
1082 | /* Discard any previous drive specifier if nm is now in UNC format. */ | |
1083 | if (IS_DIRECTORY_SEP (nm[0]) && IS_DIRECTORY_SEP (nm[1])) | |
1084 | { | |
1085 | drive = 0; | |
1086 | } | |
1087 | #endif | |
1088 | ||
1089 | /* If nm is absolute, look for /./ or /../ sequences; if none are | |
1090 | found, we can probably return right away. We will avoid allocating | |
1091 | a new string if name is already fully expanded. */ | |
570d7624 | 1092 | if ( |
5e570b75 | 1093 | IS_DIRECTORY_SEP (nm[0]) |
199607e4 | 1094 | #ifdef MSDOS |
f0f95d31 | 1095 | && drive && !is_escaped |
199607e4 RS |
1096 | #endif |
1097 | #ifdef WINDOWSNT | |
f0f95d31 | 1098 | && (drive || IS_DIRECTORY_SEP (nm[1])) && !is_escaped |
199607e4 | 1099 | #endif |
570d7624 JB |
1100 | #ifdef VMS |
1101 | || index (nm, ':') | |
1102 | #endif /* VMS */ | |
1103 | ) | |
1104 | { | |
f14b1c68 JB |
1105 | /* If it turns out that the filename we want to return is just a |
1106 | suffix of FILENAME, we don't need to go through and edit | |
1107 | things; we just need to construct a new string using data | |
1108 | starting at the middle of FILENAME. If we set lose to a | |
1109 | non-zero value, that means we've discovered that we can't do | |
1110 | that cool trick. */ | |
1111 | int lose = 0; | |
1112 | ||
570d7624 | 1113 | p = nm; |
570d7624 JB |
1114 | while (*p) |
1115 | { | |
199607e4 | 1116 | /* Since we know the name is absolute, we can assume that each |
c77d647e JB |
1117 | element starts with a "/". */ |
1118 | ||
c77d647e | 1119 | /* "." and ".." are hairy. */ |
5e570b75 | 1120 | if (IS_DIRECTORY_SEP (p[0]) |
c77d647e | 1121 | && p[1] == '.' |
5e570b75 | 1122 | && (IS_DIRECTORY_SEP (p[2]) |
c77d647e | 1123 | || p[2] == 0 |
5e570b75 | 1124 | || (p[2] == '.' && (IS_DIRECTORY_SEP (p[3]) |
c77d647e | 1125 | || p[3] == 0)))) |
570d7624 JB |
1126 | lose = 1; |
1127 | #ifdef VMS | |
1128 | if (p[0] == '\\') | |
1129 | lose = 1; | |
1130 | if (p[0] == '/') { | |
1131 | /* if dev:[dir]/, move nm to / */ | |
1132 | if (!slash && p > nm && (brack || colon)) { | |
1133 | nm = (brack ? brack + 1 : colon + 1); | |
1134 | lbrack = rbrack = 0; | |
1135 | brack = 0; | |
1136 | colon = 0; | |
1137 | } | |
1138 | slash = p; | |
1139 | } | |
1140 | if (p[0] == '-') | |
1141 | #ifndef VMS4_4 | |
1142 | /* VMS pre V4.4,convert '-'s in filenames. */ | |
1143 | if (lbrack == rbrack) | |
1144 | { | |
5e570b75 | 1145 | if (dots < 2) /* this is to allow negative version numbers */ |
570d7624 JB |
1146 | p[0] = '_'; |
1147 | } | |
1148 | else | |
1149 | #endif /* VMS4_4 */ | |
1150 | if (lbrack > rbrack && | |
1151 | ((p[-1] == '.' || p[-1] == '[' || p[-1] == '<') && | |
1152 | (p[1] == '.' || p[1] == ']' || p[1] == '>'))) | |
1153 | lose = 1; | |
1154 | #ifndef VMS4_4 | |
1155 | else | |
1156 | p[0] = '_'; | |
1157 | #endif /* VMS4_4 */ | |
1158 | /* count open brackets, reset close bracket pointer */ | |
1159 | if (p[0] == '[' || p[0] == '<') | |
1160 | lbrack++, brack = 0; | |
1161 | /* count close brackets, set close bracket pointer */ | |
1162 | if (p[0] == ']' || p[0] == '>') | |
1163 | rbrack++, brack = p; | |
1164 | /* detect ][ or >< */ | |
1165 | if ((p[0] == ']' || p[0] == '>') && (p[1] == '[' || p[1] == '<')) | |
1166 | lose = 1; | |
1167 | if ((p[0] == ':' || p[0] == ']' || p[0] == '>') && p[1] == '~') | |
1168 | nm = p + 1, lose = 1; | |
1169 | if (p[0] == ':' && (colon || slash)) | |
1170 | /* if dev1:[dir]dev2:, move nm to dev2: */ | |
1171 | if (brack) | |
1172 | { | |
1173 | nm = brack + 1; | |
1174 | brack = 0; | |
1175 | } | |
199607e4 | 1176 | /* if /name/dev:, move nm to dev: */ |
570d7624 JB |
1177 | else if (slash) |
1178 | nm = slash + 1; | |
1179 | /* if node::dev:, move colon following dev */ | |
1180 | else if (colon && colon[-1] == ':') | |
1181 | colon = p; | |
1182 | /* if dev1:dev2:, move nm to dev2: */ | |
1183 | else if (colon && colon[-1] != ':') | |
1184 | { | |
1185 | nm = colon + 1; | |
1186 | colon = 0; | |
1187 | } | |
1188 | if (p[0] == ':' && !colon) | |
1189 | { | |
1190 | if (p[1] == ':') | |
1191 | p++; | |
1192 | colon = p; | |
1193 | } | |
1194 | if (lbrack == rbrack) | |
1195 | if (p[0] == ';') | |
1196 | dots = 2; | |
1197 | else if (p[0] == '.') | |
1198 | dots++; | |
1199 | #endif /* VMS */ | |
1200 | p++; | |
1201 | } | |
1202 | if (!lose) | |
1203 | { | |
1204 | #ifdef VMS | |
1205 | if (index (nm, '/')) | |
1206 | return build_string (sys_translate_unix (nm)); | |
1207 | #endif /* VMS */ | |
199607e4 RS |
1208 | #ifdef DOS_NT |
1209 | /* Make sure directories are all separated with / or \ as | |
1210 | desired, but avoid allocation of a new string when not | |
1211 | required. */ | |
1212 | CORRECT_DIR_SEPS (nm); | |
1213 | #ifdef WINDOWSNT | |
1214 | if (IS_DIRECTORY_SEP (nm[1])) | |
1215 | { | |
1216 | if (strcmp (nm, XSTRING (name)->data) != 0) | |
1217 | name = build_string (nm); | |
1218 | } | |
1219 | else | |
1220 | #endif | |
1221 | /* drive must be set, so this is okay */ | |
1222 | if (strcmp (nm - 2, XSTRING (name)->data) != 0) | |
1223 | { | |
1224 | name = make_string (nm - 2, p - nm + 2); | |
f94988a7 | 1225 | XSTRING (name)->data[0] = DRIVE_LETTER (drive); |
199607e4 RS |
1226 | XSTRING (name)->data[1] = ':'; |
1227 | } | |
1228 | return name; | |
1229 | #else /* not DOS_NT */ | |
570d7624 JB |
1230 | if (nm == XSTRING (name)->data) |
1231 | return name; | |
1232 | return build_string (nm); | |
5e570b75 | 1233 | #endif /* not DOS_NT */ |
570d7624 JB |
1234 | } |
1235 | } | |
1236 | ||
199607e4 RS |
1237 | /* At this point, nm might or might not be an absolute file name. We |
1238 | need to expand ~ or ~user if present, otherwise prefix nm with | |
1239 | default_directory if nm is not absolute, and finally collapse /./ | |
1240 | and /foo/../ sequences. | |
1241 | ||
1242 | We set newdir to be the appropriate prefix if one is needed: | |
1243 | - the relevant user directory if nm starts with ~ or ~user | |
1244 | - the specified drive's working dir (DOS/NT only) if nm does not | |
1245 | start with / | |
1246 | - the value of default_directory. | |
1247 | ||
1248 | Note that these prefixes are not guaranteed to be absolute (except | |
1249 | for the working dir of a drive). Therefore, to ensure we always | |
1250 | return an absolute name, if the final prefix is not absolute we | |
1251 | append it to the current working directory. */ | |
570d7624 JB |
1252 | |
1253 | newdir = 0; | |
1254 | ||
1255 | if (nm[0] == '~') /* prefix ~ */ | |
c77d647e | 1256 | { |
5e570b75 | 1257 | if (IS_DIRECTORY_SEP (nm[1]) |
570d7624 | 1258 | #ifdef VMS |
c77d647e | 1259 | || nm[1] == ':' |
5e570b75 | 1260 | #endif /* VMS */ |
c77d647e JB |
1261 | || nm[1] == 0) /* ~ by itself */ |
1262 | { | |
1263 | if (!(newdir = (unsigned char *) egetenv ("HOME"))) | |
1264 | newdir = (unsigned char *) ""; | |
199607e4 | 1265 | nm++; |
5e570b75 | 1266 | #ifdef DOS_NT |
9a1dc3be | 1267 | collapse_newdir = 0; |
4c3c22f3 | 1268 | #endif |
570d7624 | 1269 | #ifdef VMS |
c77d647e | 1270 | nm++; /* Don't leave the slash in nm. */ |
5e570b75 | 1271 | #endif /* VMS */ |
c77d647e JB |
1272 | } |
1273 | else /* ~user/filename */ | |
1274 | { | |
5e570b75 | 1275 | for (p = nm; *p && (!IS_DIRECTORY_SEP (*p) |
570d7624 | 1276 | #ifdef VMS |
c77d647e | 1277 | && *p != ':' |
5e570b75 | 1278 | #endif /* VMS */ |
c77d647e JB |
1279 | ); p++); |
1280 | o = (unsigned char *) alloca (p - nm + 1); | |
1281 | bcopy ((char *) nm, o, p - nm); | |
1282 | o [p - nm] = 0; | |
1283 | ||
1284 | pw = (struct passwd *) getpwnam (o + 1); | |
1285 | if (pw) | |
1286 | { | |
1287 | newdir = (unsigned char *) pw -> pw_dir; | |
570d7624 | 1288 | #ifdef VMS |
c77d647e | 1289 | nm = p + 1; /* skip the terminator */ |
570d7624 | 1290 | #else |
c77d647e | 1291 | nm = p; |
199607e4 | 1292 | #ifdef DOS_NT |
9a1dc3be | 1293 | collapse_newdir = 0; |
199607e4 | 1294 | #endif |
5e570b75 | 1295 | #endif /* VMS */ |
c77d647e | 1296 | } |
e5d77022 | 1297 | |
c77d647e JB |
1298 | /* If we don't find a user of that name, leave the name |
1299 | unchanged; don't move nm forward to p. */ | |
1300 | } | |
1301 | } | |
570d7624 | 1302 | |
5e570b75 | 1303 | #ifdef DOS_NT |
199607e4 RS |
1304 | /* On DOS and Windows, nm is absolute if a drive name was specified; |
1305 | use the drive's current directory as the prefix if needed. */ | |
1306 | if (!newdir && drive) | |
1307 | { | |
1308 | /* Get default directory if needed to make nm absolute. */ | |
1309 | if (!IS_DIRECTORY_SEP (nm[0])) | |
1310 | { | |
1311 | newdir = alloca (MAXPATHLEN + 1); | |
1312 | if (!getdefdir (toupper (drive) - 'A' + 1, newdir)) | |
1313 | newdir = NULL; | |
1314 | } | |
1315 | if (!newdir) | |
1316 | { | |
1317 | /* Either nm starts with /, or drive isn't mounted. */ | |
1318 | newdir = alloca (4); | |
f94988a7 | 1319 | newdir[0] = DRIVE_LETTER (drive); |
199607e4 RS |
1320 | newdir[1] = ':'; |
1321 | newdir[2] = '/'; | |
1322 | newdir[3] = 0; | |
1323 | } | |
1324 | } | |
5e570b75 | 1325 | #endif /* DOS_NT */ |
199607e4 RS |
1326 | |
1327 | /* Finally, if no prefix has been specified and nm is not absolute, | |
1328 | then it must be expanded relative to default_directory. */ | |
1329 | ||
34097368 | 1330 | if (1 |
199607e4 RS |
1331 | #ifndef DOS_NT |
1332 | /* /... alone is not absolute on DOS and Windows. */ | |
34097368 | 1333 | && !IS_DIRECTORY_SEP (nm[0]) |
199607e4 RS |
1334 | #endif |
1335 | #ifdef WINDOWSNT | |
34097368 | 1336 | && !(IS_DIRECTORY_SEP (nm[0]) && IS_DIRECTORY_SEP (nm[1])) |
199607e4 RS |
1337 | #endif |
1338 | #ifdef VMS | |
1339 | && !index (nm, ':') | |
1340 | #endif | |
570d7624 JB |
1341 | && !newdir) |
1342 | { | |
3b7f6e60 | 1343 | newdir = XSTRING (default_directory)->data; |
f0f95d31 RS |
1344 | #ifdef DOS_NT |
1345 | /* Note if special escape prefix is present, but remove for now. */ | |
1346 | if (newdir[0] == '/' && newdir[1] == ':') | |
1347 | { | |
1348 | is_escaped = 1; | |
1349 | newdir += 2; | |
1350 | } | |
1351 | #endif | |
570d7624 JB |
1352 | } |
1353 | ||
5e570b75 | 1354 | #ifdef DOS_NT |
199607e4 RS |
1355 | if (newdir) |
1356 | { | |
1357 | /* First ensure newdir is an absolute name. */ | |
1358 | if ( | |
1359 | /* Detect MSDOS file names with drive specifiers. */ | |
1360 | ! (IS_DRIVE (newdir[0]) | |
1361 | && IS_DEVICE_SEP (newdir[1]) && IS_DIRECTORY_SEP (newdir[2])) | |
1362 | #ifdef WINDOWSNT | |
1363 | /* Detect Windows file names in UNC format. */ | |
1364 | && ! (IS_DIRECTORY_SEP (newdir[0]) && IS_DIRECTORY_SEP (newdir[1])) | |
1365 | #endif | |
1366 | ) | |
1367 | { | |
1368 | /* Effectively, let newdir be (expand-file-name newdir cwd). | |
1369 | Because of the admonition against calling expand-file-name | |
1370 | when we have pointers into lisp strings, we accomplish this | |
1371 | indirectly by prepending newdir to nm if necessary, and using | |
1372 | cwd (or the wd of newdir's drive) as the new newdir. */ | |
1373 | ||
1374 | if (IS_DRIVE (newdir[0]) && newdir[1] == ':') | |
1375 | { | |
1376 | drive = newdir[0]; | |
1377 | newdir += 2; | |
1378 | } | |
1379 | if (!IS_DIRECTORY_SEP (nm[0])) | |
1380 | { | |
1381 | char * tmp = alloca (strlen (newdir) + strlen (nm) + 2); | |
1382 | file_name_as_directory (tmp, newdir); | |
1383 | strcat (tmp, nm); | |
1384 | nm = tmp; | |
1385 | } | |
1386 | newdir = alloca (MAXPATHLEN + 1); | |
1387 | if (drive) | |
1388 | { | |
1389 | if (!getdefdir (toupper (drive) - 'A' + 1, newdir)) | |
1390 | newdir = "/"; | |
1391 | } | |
1392 | else | |
1393 | getwd (newdir); | |
1394 | } | |
1395 | ||
1396 | /* Strip off drive name from prefix, if present. */ | |
1397 | if (IS_DRIVE (newdir[0]) && newdir[1] == ':') | |
1398 | { | |
1399 | drive = newdir[0]; | |
1400 | newdir += 2; | |
1401 | } | |
1402 | ||
1403 | /* Keep only a prefix from newdir if nm starts with slash | |
82330e7f | 1404 | (//server/share for UNC, nothing otherwise). */ |
9a1dc3be | 1405 | if (IS_DIRECTORY_SEP (nm[0]) && collapse_newdir) |
199607e4 RS |
1406 | { |
1407 | #ifdef WINDOWSNT | |
1408 | if (IS_DIRECTORY_SEP (newdir[0]) && IS_DIRECTORY_SEP (newdir[1])) | |
1409 | { | |
1410 | newdir = strcpy (alloca (strlen (newdir) + 1), newdir); | |
1411 | p = newdir + 2; | |
1412 | while (*p && !IS_DIRECTORY_SEP (*p)) p++; | |
1413 | p++; | |
1414 | while (*p && !IS_DIRECTORY_SEP (*p)) p++; | |
1415 | *p = 0; | |
1416 | } | |
1417 | else | |
1418 | #endif | |
1419 | newdir = ""; | |
1420 | } | |
1421 | } | |
5e570b75 | 1422 | #endif /* DOS_NT */ |
199607e4 RS |
1423 | |
1424 | if (newdir) | |
bfb61299 | 1425 | { |
57676091 | 1426 | /* Get rid of any slash at the end of newdir, unless newdir is |
f0f95d31 | 1427 | just / or // (an incomplete UNC name). */ |
199607e4 | 1428 | length = strlen (newdir); |
f0f95d31 | 1429 | if (length > 1 && IS_DIRECTORY_SEP (newdir[length - 1]) |
57676091 RS |
1430 | #ifdef WINDOWSNT |
1431 | && !(length == 2 && IS_DIRECTORY_SEP (newdir[0])) | |
1432 | #endif | |
1433 | ) | |
bfb61299 JB |
1434 | { |
1435 | unsigned char *temp = (unsigned char *) alloca (length); | |
1436 | bcopy (newdir, temp, length - 1); | |
1437 | temp[length - 1] = 0; | |
1438 | newdir = temp; | |
1439 | } | |
1440 | tlen = length + 1; | |
1441 | } | |
1442 | else | |
1443 | tlen = 0; | |
570d7624 | 1444 | |
bfb61299 JB |
1445 | /* Now concatenate the directory and name to new space in the stack frame */ |
1446 | tlen += strlen (nm) + 1; | |
5e570b75 | 1447 | #ifdef DOS_NT |
f0f95d31 RS |
1448 | /* Reserve space for drive specifier and escape prefix, since either |
1449 | or both may need to be inserted. (The Microsoft x86 compiler | |
5e570b75 | 1450 | produces incorrect code if the following two lines are combined.) */ |
f0f95d31 RS |
1451 | target = (unsigned char *) alloca (tlen + 4); |
1452 | target += 4; | |
5e570b75 | 1453 | #else /* not DOS_NT */ |
570d7624 | 1454 | target = (unsigned char *) alloca (tlen); |
5e570b75 | 1455 | #endif /* not DOS_NT */ |
570d7624 JB |
1456 | *target = 0; |
1457 | ||
1458 | if (newdir) | |
1459 | { | |
1460 | #ifndef VMS | |
5e570b75 | 1461 | if (nm[0] == 0 || IS_DIRECTORY_SEP (nm[0])) |
f5321b5c | 1462 | { |
3ea2d8b2 | 1463 | #ifdef DOS_NT |
f5321b5c RS |
1464 | /* If newdir is effectively "C:/", then the drive letter will have |
1465 | been stripped and newdir will be "/". Concatenating with an | |
1466 | absolute directory in nm produces "//", which will then be | |
1467 | incorrectly treated as a network share. Ignore newdir in | |
1468 | this case (keeping the drive letter). */ | |
1469 | if (!(drive && nm[0] && IS_DIRECTORY_SEP (newdir[0]) | |
1470 | && newdir[1] == '\0')) | |
1471 | #endif | |
1472 | strcpy (target, newdir); | |
1473 | } | |
570d7624 JB |
1474 | else |
1475 | #endif | |
c77d647e | 1476 | file_name_as_directory (target, newdir); |
570d7624 JB |
1477 | } |
1478 | ||
1479 | strcat (target, nm); | |
1480 | #ifdef VMS | |
1481 | if (index (target, '/')) | |
1482 | strcpy (target, sys_translate_unix (target)); | |
1483 | #endif /* VMS */ | |
1484 | ||
199607e4 RS |
1485 | /* ASSERT (IS_DIRECTORY_SEP (target[0])) if not VMS */ |
1486 | ||
c77d647e | 1487 | /* Now canonicalize by removing /. and /foo/.. if they appear. */ |
570d7624 JB |
1488 | |
1489 | p = target; | |
1490 | o = target; | |
1491 | ||
1492 | while (*p) | |
1493 | { | |
1494 | #ifdef VMS | |
1495 | if (*p != ']' && *p != '>' && *p != '-') | |
1496 | { | |
1497 | if (*p == '\\') | |
1498 | p++; | |
1499 | *o++ = *p++; | |
1500 | } | |
1501 | else if ((p[0] == ']' || p[0] == '>') && p[0] == p[1] + 2) | |
1502 | /* brackets are offset from each other by 2 */ | |
1503 | { | |
1504 | p += 2; | |
1505 | if (*p != '.' && *p != '-' && o[-1] != '.') | |
1506 | /* convert [foo][bar] to [bar] */ | |
1507 | while (o[-1] != '[' && o[-1] != '<') | |
1508 | o--; | |
1509 | else if (*p == '-' && *o != '.') | |
1510 | *--p = '.'; | |
1511 | } | |
1512 | else if (p[0] == '-' && o[-1] == '.' && | |
1513 | (p[1] == '.' || p[1] == ']' || p[1] == '>')) | |
1514 | /* flush .foo.- ; leave - if stopped by '[' or '<' */ | |
1515 | { | |
1516 | do | |
1517 | o--; | |
1518 | while (o[-1] != '.' && o[-1] != '[' && o[-1] != '<'); | |
5e570b75 | 1519 | if (p[1] == '.') /* foo.-.bar ==> bar. */ |
570d7624 JB |
1520 | p += 2; |
1521 | else if (o[-1] == '.') /* '.foo.-]' ==> ']' */ | |
1522 | p++, o--; | |
1523 | /* else [foo.-] ==> [-] */ | |
1524 | } | |
1525 | else | |
1526 | { | |
1527 | #ifndef VMS4_4 | |
1528 | if (*p == '-' && | |
1529 | o[-1] != '[' && o[-1] != '<' && o[-1] != '.' && | |
1530 | p[1] != ']' && p[1] != '>' && p[1] != '.') | |
1531 | *p = '_'; | |
1532 | #endif /* VMS4_4 */ | |
1533 | *o++ = *p++; | |
1534 | } | |
1535 | #else /* not VMS */ | |
5e570b75 RS |
1536 | if (!IS_DIRECTORY_SEP (*p)) |
1537 | { | |
570d7624 JB |
1538 | *o++ = *p++; |
1539 | } | |
5e570b75 | 1540 | else if (IS_DIRECTORY_SEP (p[0]) |
c77d647e | 1541 | && p[1] == '.' |
5e570b75 | 1542 | && (IS_DIRECTORY_SEP (p[2]) |
c77d647e JB |
1543 | || p[2] == 0)) |
1544 | { | |
1545 | /* If "/." is the entire filename, keep the "/". Otherwise, | |
1546 | just delete the whole "/.". */ | |
1547 | if (o == target && p[2] == '\0') | |
1548 | *o++ = *p; | |
1549 | p += 2; | |
1550 | } | |
c0fa5a0b | 1551 | else if (IS_DIRECTORY_SEP (p[0]) && p[1] == '.' && p[2] == '.' |
570d7624 JB |
1552 | /* `/../' is the "superroot" on certain file systems. */ |
1553 | && o != target | |
5e570b75 | 1554 | && (IS_DIRECTORY_SEP (p[3]) || p[3] == 0)) |
570d7624 | 1555 | { |
5e570b75 | 1556 | while (o != target && (--o) && !IS_DIRECTORY_SEP (*o)) |
570d7624 | 1557 | ; |
795de720 RS |
1558 | /* Keep initial / only if this is the whole name. */ |
1559 | if (o == target && IS_ANY_SEP (*o) && p[3] == 0) | |
51b1d12e | 1560 | ++o; |
570d7624 JB |
1561 | p += 3; |
1562 | } | |
1563 | else | |
5e570b75 | 1564 | { |
570d7624 JB |
1565 | *o++ = *p++; |
1566 | } | |
1567 | #endif /* not VMS */ | |
1568 | } | |
1569 | ||
5e570b75 | 1570 | #ifdef DOS_NT |
199607e4 | 1571 | /* At last, set drive name. */ |
5e570b75 | 1572 | #ifdef WINDOWSNT |
199607e4 RS |
1573 | /* Except for network file name. */ |
1574 | if (!(IS_DIRECTORY_SEP (target[0]) && IS_DIRECTORY_SEP (target[1]))) | |
5e570b75 | 1575 | #endif /* WINDOWSNT */ |
4c3c22f3 | 1576 | { |
199607e4 | 1577 | if (!drive) abort (); |
4c3c22f3 | 1578 | target -= 2; |
f94988a7 | 1579 | target[0] = DRIVE_LETTER (drive); |
4c3c22f3 RS |
1580 | target[1] = ':'; |
1581 | } | |
f0f95d31 RS |
1582 | /* Reinsert the escape prefix if required. */ |
1583 | if (is_escaped) | |
1584 | { | |
1585 | target -= 2; | |
1586 | target[0] = '/'; | |
1587 | target[1] = ':'; | |
1588 | } | |
199607e4 | 1589 | CORRECT_DIR_SEPS (target); |
5e570b75 | 1590 | #endif /* DOS_NT */ |
4c3c22f3 | 1591 | |
570d7624 JB |
1592 | return make_string (target, o - target); |
1593 | } | |
5e570b75 | 1594 | |
570d7624 | 1595 | #if 0 |
5e570b75 | 1596 | /* Changed this DEFUN to a DEAFUN, so as not to confuse `make-docfile'. */ |
e5d77022 | 1597 | DEAFUN ("expand-file-name", Fexpand_file_name, Sexpand_file_name, 1, 2, 0, |
570d7624 JB |
1598 | "Convert FILENAME to absolute, and canonicalize it.\n\ |
1599 | Second arg DEFAULT is directory to start with if FILENAME is relative\n\ | |
1600 | (does not start with slash); if DEFAULT is nil or missing,\n\ | |
1601 | the current buffer's value of default-directory is used.\n\ | |
1602 | Filenames containing `.' or `..' as components are simplified;\n\ | |
1603 | initial `~/' expands to your home directory.\n\ | |
1604 | See also the function `substitute-in-file-name'.") | |
1605 | (name, defalt) | |
1606 | Lisp_Object name, defalt; | |
1607 | { | |
1608 | unsigned char *nm; | |
199607e4 | 1609 | |
570d7624 JB |
1610 | register unsigned char *newdir, *p, *o; |
1611 | int tlen; | |
1612 | unsigned char *target; | |
1613 | struct passwd *pw; | |
1614 | int lose; | |
1615 | #ifdef VMS | |
1616 | unsigned char * colon = 0; | |
1617 | unsigned char * close = 0; | |
1618 | unsigned char * slash = 0; | |
1619 | unsigned char * brack = 0; | |
1620 | int lbrack = 0, rbrack = 0; | |
1621 | int dots = 0; | |
1622 | #endif /* VMS */ | |
199607e4 | 1623 | |
570d7624 JB |
1624 | CHECK_STRING (name, 0); |
1625 | ||
1626 | #ifdef VMS | |
1627 | /* Filenames on VMS are always upper case. */ | |
1628 | name = Fupcase (name); | |
1629 | #endif | |
1630 | ||
1631 | nm = XSTRING (name)->data; | |
199607e4 | 1632 | |
570d7624 | 1633 | /* If nm is absolute, flush ...// and detect /./ and /../. |
82330e7f | 1634 | If no /./ or /../ we can return right away. */ |
570d7624 JB |
1635 | if ( |
1636 | nm[0] == '/' | |
1637 | #ifdef VMS | |
1638 | || index (nm, ':') | |
1639 | #endif /* VMS */ | |
1640 | ) | |
1641 | { | |
1642 | p = nm; | |
1643 | lose = 0; | |
1644 | while (*p) | |
1645 | { | |
1646 | if (p[0] == '/' && p[1] == '/' | |
1647 | #ifdef APOLLO | |
82330e7f | 1648 | /* // at start of filename is meaningful on Apollo system. */ |
570d7624 JB |
1649 | && nm != p |
1650 | #endif /* APOLLO */ | |
1651 | ) | |
1652 | nm = p + 1; | |
1653 | if (p[0] == '/' && p[1] == '~') | |
1654 | nm = p + 1, lose = 1; | |
1655 | if (p[0] == '/' && p[1] == '.' | |
1656 | && (p[2] == '/' || p[2] == 0 | |
1657 | || (p[2] == '.' && (p[3] == '/' || p[3] == 0)))) | |
1658 | lose = 1; | |
1659 | #ifdef VMS | |
1660 | if (p[0] == '\\') | |
1661 | lose = 1; | |
1662 | if (p[0] == '/') { | |
1663 | /* if dev:[dir]/, move nm to / */ | |
1664 | if (!slash && p > nm && (brack || colon)) { | |
1665 | nm = (brack ? brack + 1 : colon + 1); | |
1666 | lbrack = rbrack = 0; | |
1667 | brack = 0; | |
1668 | colon = 0; | |
1669 | } | |
1670 | slash = p; | |
1671 | } | |
1672 | if (p[0] == '-') | |
1673 | #ifndef VMS4_4 | |
1674 | /* VMS pre V4.4,convert '-'s in filenames. */ | |
1675 | if (lbrack == rbrack) | |
1676 | { | |
5e570b75 | 1677 | if (dots < 2) /* this is to allow negative version numbers */ |
570d7624 JB |
1678 | p[0] = '_'; |
1679 | } | |
1680 | else | |
1681 | #endif /* VMS4_4 */ | |
1682 | if (lbrack > rbrack && | |
1683 | ((p[-1] == '.' || p[-1] == '[' || p[-1] == '<') && | |
1684 | (p[1] == '.' || p[1] == ']' || p[1] == '>'))) | |
1685 | lose = 1; | |
1686 | #ifndef VMS4_4 | |
1687 | else | |
1688 | p[0] = '_'; | |
1689 | #endif /* VMS4_4 */ | |
1690 | /* count open brackets, reset close bracket pointer */ | |
1691 | if (p[0] == '[' || p[0] == '<') | |
1692 | lbrack++, brack = 0; | |
1693 | /* count close brackets, set close bracket pointer */ | |
1694 | if (p[0] == ']' || p[0] == '>') | |
1695 | rbrack++, brack = p; | |
1696 | /* detect ][ or >< */ | |
1697 | if ((p[0] == ']' || p[0] == '>') && (p[1] == '[' || p[1] == '<')) | |
1698 | lose = 1; | |
1699 | if ((p[0] == ':' || p[0] == ']' || p[0] == '>') && p[1] == '~') | |
1700 | nm = p + 1, lose = 1; | |
1701 | if (p[0] == ':' && (colon || slash)) | |
1702 | /* if dev1:[dir]dev2:, move nm to dev2: */ | |
1703 | if (brack) | |
1704 | { | |
1705 | nm = brack + 1; | |
1706 | brack = 0; | |
1707 | } | |
199607e4 | 1708 | /* If /name/dev:, move nm to dev: */ |
570d7624 JB |
1709 | else if (slash) |
1710 | nm = slash + 1; | |
199607e4 | 1711 | /* If node::dev:, move colon following dev */ |
570d7624 JB |
1712 | else if (colon && colon[-1] == ':') |
1713 | colon = p; | |
199607e4 | 1714 | /* If dev1:dev2:, move nm to dev2: */ |
570d7624 JB |
1715 | else if (colon && colon[-1] != ':') |
1716 | { | |
1717 | nm = colon + 1; | |
1718 | colon = 0; | |
1719 | } | |
1720 | if (p[0] == ':' && !colon) | |
1721 | { | |
1722 | if (p[1] == ':') | |
1723 | p++; | |
1724 | colon = p; | |
1725 | } | |
1726 | if (lbrack == rbrack) | |
1727 | if (p[0] == ';') | |
1728 | dots = 2; | |
1729 | else if (p[0] == '.') | |
1730 | dots++; | |
1731 | #endif /* VMS */ | |
1732 | p++; | |
1733 | } | |
1734 | if (!lose) | |
1735 | { | |
1736 | #ifdef VMS | |
1737 | if (index (nm, '/')) | |
1738 | return build_string (sys_translate_unix (nm)); | |
1739 | #endif /* VMS */ | |
1740 | if (nm == XSTRING (name)->data) | |
1741 | return name; | |
1742 | return build_string (nm); | |
1743 | } | |
1744 | } | |
1745 | ||
1746 | /* Now determine directory to start with and put it in NEWDIR */ | |
1747 | ||
1748 | newdir = 0; | |
1749 | ||
5e570b75 | 1750 | if (nm[0] == '~') /* prefix ~ */ |
570d7624 JB |
1751 | if (nm[1] == '/' |
1752 | #ifdef VMS | |
1753 | || nm[1] == ':' | |
1754 | #endif /* VMS */ | |
1755 | || nm[1] == 0)/* ~/filename */ | |
1756 | { | |
1757 | if (!(newdir = (unsigned char *) egetenv ("HOME"))) | |
1758 | newdir = (unsigned char *) ""; | |
1759 | nm++; | |
1760 | #ifdef VMS | |
5e570b75 | 1761 | nm++; /* Don't leave the slash in nm. */ |
570d7624 JB |
1762 | #endif /* VMS */ |
1763 | } | |
1764 | else /* ~user/filename */ | |
1765 | { | |
1766 | /* Get past ~ to user */ | |
1767 | unsigned char *user = nm + 1; | |
1768 | /* Find end of name. */ | |
1769 | unsigned char *ptr = (unsigned char *) index (user, '/'); | |
1770 | int len = ptr ? ptr - user : strlen (user); | |
1771 | #ifdef VMS | |
1772 | unsigned char *ptr1 = index (user, ':'); | |
1773 | if (ptr1 != 0 && ptr1 - user < len) | |
1774 | len = ptr1 - user; | |
5e570b75 | 1775 | #endif /* VMS */ |
570d7624 JB |
1776 | /* Copy the user name into temp storage. */ |
1777 | o = (unsigned char *) alloca (len + 1); | |
1778 | bcopy ((char *) user, o, len); | |
1779 | o[len] = 0; | |
1780 | ||
1781 | /* Look up the user name. */ | |
1782 | pw = (struct passwd *) getpwnam (o + 1); | |
1783 | if (!pw) | |
1784 | error ("\"%s\" isn't a registered user", o + 1); | |
1785 | ||
1786 | newdir = (unsigned char *) pw->pw_dir; | |
1787 | ||
1788 | /* Discard the user name from NM. */ | |
1789 | nm += len; | |
1790 | } | |
1791 | ||
1792 | if (nm[0] != '/' | |
1793 | #ifdef VMS | |
1794 | && !index (nm, ':') | |
1795 | #endif /* not VMS */ | |
1796 | && !newdir) | |
1797 | { | |
265a9e55 | 1798 | if (NILP (defalt)) |
570d7624 JB |
1799 | defalt = current_buffer->directory; |
1800 | CHECK_STRING (defalt, 1); | |
1801 | newdir = XSTRING (defalt)->data; | |
1802 | } | |
1803 | ||
1804 | /* Now concatenate the directory and name to new space in the stack frame */ | |
1805 | ||
1806 | tlen = (newdir ? strlen (newdir) + 1 : 0) + strlen (nm) + 1; | |
1807 | target = (unsigned char *) alloca (tlen); | |
1808 | *target = 0; | |
1809 | ||
1810 | if (newdir) | |
1811 | { | |
1812 | #ifndef VMS | |
1813 | if (nm[0] == 0 || nm[0] == '/') | |
1814 | strcpy (target, newdir); | |
1815 | else | |
1816 | #endif | |
1817 | file_name_as_directory (target, newdir); | |
1818 | } | |
1819 | ||
1820 | strcat (target, nm); | |
1821 | #ifdef VMS | |
1822 | if (index (target, '/')) | |
1823 | strcpy (target, sys_translate_unix (target)); | |
1824 | #endif /* VMS */ | |
1825 | ||
1826 | /* Now canonicalize by removing /. and /foo/.. if they appear */ | |
1827 | ||
1828 | p = target; | |
1829 | o = target; | |
1830 | ||
1831 | while (*p) | |
1832 | { | |
1833 | #ifdef VMS | |
1834 | if (*p != ']' && *p != '>' && *p != '-') | |
1835 | { | |
1836 | if (*p == '\\') | |
1837 | p++; | |
1838 | *o++ = *p++; | |
1839 | } | |
1840 | else if ((p[0] == ']' || p[0] == '>') && p[0] == p[1] + 2) | |
1841 | /* brackets are offset from each other by 2 */ | |
1842 | { | |
1843 | p += 2; | |
1844 | if (*p != '.' && *p != '-' && o[-1] != '.') | |
1845 | /* convert [foo][bar] to [bar] */ | |
1846 | while (o[-1] != '[' && o[-1] != '<') | |
1847 | o--; | |
1848 | else if (*p == '-' && *o != '.') | |
1849 | *--p = '.'; | |
1850 | } | |
1851 | else if (p[0] == '-' && o[-1] == '.' && | |
1852 | (p[1] == '.' || p[1] == ']' || p[1] == '>')) | |
1853 | /* flush .foo.- ; leave - if stopped by '[' or '<' */ | |
1854 | { | |
1855 | do | |
1856 | o--; | |
1857 | while (o[-1] != '.' && o[-1] != '[' && o[-1] != '<'); | |
5e570b75 | 1858 | if (p[1] == '.') /* foo.-.bar ==> bar. */ |
570d7624 JB |
1859 | p += 2; |
1860 | else if (o[-1] == '.') /* '.foo.-]' ==> ']' */ | |
1861 | p++, o--; | |
1862 | /* else [foo.-] ==> [-] */ | |
1863 | } | |
1864 | else | |
1865 | { | |
1866 | #ifndef VMS4_4 | |
1867 | if (*p == '-' && | |
1868 | o[-1] != '[' && o[-1] != '<' && o[-1] != '.' && | |
1869 | p[1] != ']' && p[1] != '>' && p[1] != '.') | |
1870 | *p = '_'; | |
1871 | #endif /* VMS4_4 */ | |
1872 | *o++ = *p++; | |
1873 | } | |
1874 | #else /* not VMS */ | |
1875 | if (*p != '/') | |
5e570b75 | 1876 | { |
570d7624 JB |
1877 | *o++ = *p++; |
1878 | } | |
1879 | else if (!strncmp (p, "//", 2) | |
1880 | #ifdef APOLLO | |
82330e7f | 1881 | /* // at start of filename is meaningful in Apollo system. */ |
570d7624 JB |
1882 | && o != target |
1883 | #endif /* APOLLO */ | |
1884 | ) | |
1885 | { | |
1886 | o = target; | |
1887 | p++; | |
1888 | } | |
1889 | else if (p[0] == '/' && p[1] == '.' && | |
1890 | (p[2] == '/' || p[2] == 0)) | |
1891 | p += 2; | |
1892 | else if (!strncmp (p, "/..", 3) | |
1893 | /* `/../' is the "superroot" on certain file systems. */ | |
1894 | && o != target | |
1895 | && (p[3] == '/' || p[3] == 0)) | |
1896 | { | |
1897 | while (o != target && *--o != '/') | |
1898 | ; | |
1899 | #ifdef APOLLO | |
1900 | if (o == target + 1 && o[-1] == '/' && o[0] == '/') | |
1901 | ++o; | |
1902 | else | |
1903 | #endif /* APOLLO */ | |
1904 | if (o == target && *o == '/') | |
1905 | ++o; | |
1906 | p += 3; | |
1907 | } | |
1908 | else | |
5e570b75 | 1909 | { |
570d7624 JB |
1910 | *o++ = *p++; |
1911 | } | |
1912 | #endif /* not VMS */ | |
1913 | } | |
1914 | ||
1915 | return make_string (target, o - target); | |
1916 | } | |
1917 | #endif | |
1918 | \f | |
1919 | DEFUN ("substitute-in-file-name", Fsubstitute_in_file_name, | |
1920 | Ssubstitute_in_file_name, 1, 1, 0, | |
1921 | "Substitute environment variables referred to in FILENAME.\n\ | |
1922 | `$FOO' where FOO is an environment variable name means to substitute\n\ | |
1923 | the value of that variable. The variable name should be terminated\n\ | |
1924 | with a character not a letter, digit or underscore; otherwise, enclose\n\ | |
1925 | the entire variable name in braces.\n\ | |
1926 | If `/~' appears, all of FILENAME through that `/' is discarded.\n\n\ | |
1927 | On VMS, `$' substitution is not done; this function does little and only\n\ | |
1928 | duplicates what `expand-file-name' does.") | |
3b7f6e60 EN |
1929 | (filename) |
1930 | Lisp_Object filename; | |
570d7624 JB |
1931 | { |
1932 | unsigned char *nm; | |
1933 | ||
1934 | register unsigned char *s, *p, *o, *x, *endp; | |
1935 | unsigned char *target; | |
1936 | int total = 0; | |
1937 | int substituted = 0; | |
1938 | unsigned char *xnm; | |
8ce069f5 | 1939 | Lisp_Object handler; |
570d7624 | 1940 | |
3b7f6e60 | 1941 | CHECK_STRING (filename, 0); |
570d7624 | 1942 | |
8ce069f5 RS |
1943 | /* If the file name has special constructs in it, |
1944 | call the corresponding file handler. */ | |
3b7f6e60 | 1945 | handler = Ffind_file_name_handler (filename, Qsubstitute_in_file_name); |
8ce069f5 | 1946 | if (!NILP (handler)) |
3b7f6e60 | 1947 | return call2 (handler, Qsubstitute_in_file_name, filename); |
8ce069f5 | 1948 | |
3b7f6e60 | 1949 | nm = XSTRING (filename)->data; |
199607e4 RS |
1950 | #ifdef DOS_NT |
1951 | nm = strcpy (alloca (strlen (nm) + 1), nm); | |
1952 | CORRECT_DIR_SEPS (nm); | |
1953 | substituted = (strcmp (nm, XSTRING (filename)->data) != 0); | |
a5a1cc06 | 1954 | #endif |
fc932ac6 | 1955 | endp = nm + STRING_BYTES (XSTRING (filename)); |
570d7624 | 1956 | |
82330e7f | 1957 | /* If /~ or // appears, discard everything through first slash. */ |
570d7624 JB |
1958 | |
1959 | for (p = nm; p != endp; p++) | |
1960 | { | |
199607e4 RS |
1961 | if ((p[0] == '~' |
1962 | #if defined (APOLLO) || defined (WINDOWSNT) | |
1963 | /* // at start of file name is meaningful in Apollo and | |
82330e7f | 1964 | WindowsNT systems. */ |
199607e4 RS |
1965 | || (IS_DIRECTORY_SEP (p[0]) && p - 1 != nm) |
1966 | #else /* not (APOLLO || WINDOWSNT) */ | |
1967 | || IS_DIRECTORY_SEP (p[0]) | |
1968 | #endif /* not (APOLLO || WINDOWSNT) */ | |
570d7624 | 1969 | ) |
5e570b75 RS |
1970 | && p != nm |
1971 | && (0 | |
570d7624 | 1972 | #ifdef VMS |
5e570b75 | 1973 | || p[-1] == ':' || p[-1] == ']' || p[-1] == '>' |
570d7624 | 1974 | #endif /* VMS */ |
5e570b75 | 1975 | || IS_DIRECTORY_SEP (p[-1]))) |
570d7624 JB |
1976 | { |
1977 | nm = p; | |
1978 | substituted = 1; | |
1979 | } | |
5e570b75 | 1980 | #ifdef DOS_NT |
199607e4 RS |
1981 | /* see comment in expand-file-name about drive specifiers */ |
1982 | else if (IS_DRIVE (p[0]) && p[1] == ':' | |
1983 | && p > nm && IS_DIRECTORY_SEP (p[-1])) | |
4c3c22f3 RS |
1984 | { |
1985 | nm = p; | |
1986 | substituted = 1; | |
1987 | } | |
5e570b75 | 1988 | #endif /* DOS_NT */ |
570d7624 JB |
1989 | } |
1990 | ||
1991 | #ifdef VMS | |
1992 | return build_string (nm); | |
1993 | #else | |
1994 | ||
1995 | /* See if any variables are substituted into the string | |
1996 | and find the total length of their values in `total' */ | |
1997 | ||
1998 | for (p = nm; p != endp;) | |
1999 | if (*p != '$') | |
2000 | p++; | |
2001 | else | |
2002 | { | |
2003 | p++; | |
2004 | if (p == endp) | |
2005 | goto badsubst; | |
2006 | else if (*p == '$') | |
2007 | { | |
2008 | /* "$$" means a single "$" */ | |
2009 | p++; | |
2010 | total -= 1; | |
2011 | substituted = 1; | |
2012 | continue; | |
2013 | } | |
2014 | else if (*p == '{') | |
2015 | { | |
2016 | o = ++p; | |
2017 | while (p != endp && *p != '}') p++; | |
2018 | if (*p != '}') goto missingclose; | |
2019 | s = p; | |
2020 | } | |
2021 | else | |
2022 | { | |
2023 | o = p; | |
2024 | while (p != endp && (isalnum (*p) || *p == '_')) p++; | |
2025 | s = p; | |
2026 | } | |
2027 | ||
2028 | /* Copy out the variable name */ | |
2029 | target = (unsigned char *) alloca (s - o + 1); | |
2030 | strncpy (target, o, s - o); | |
2031 | target[s - o] = 0; | |
5e570b75 | 2032 | #ifdef DOS_NT |
4c3c22f3 | 2033 | strupr (target); /* $home == $HOME etc. */ |
5e570b75 | 2034 | #endif /* DOS_NT */ |
570d7624 JB |
2035 | |
2036 | /* Get variable value */ | |
2037 | o = (unsigned char *) egetenv (target); | |
570d7624 JB |
2038 | if (!o) goto badvar; |
2039 | total += strlen (o); | |
2040 | substituted = 1; | |
2041 | } | |
2042 | ||
2043 | if (!substituted) | |
3b7f6e60 | 2044 | return filename; |
570d7624 JB |
2045 | |
2046 | /* If substitution required, recopy the string and do it */ | |
2047 | /* Make space in stack frame for the new copy */ | |
fc932ac6 | 2048 | xnm = (unsigned char *) alloca (STRING_BYTES (XSTRING (filename)) + total + 1); |
570d7624 JB |
2049 | x = xnm; |
2050 | ||
2051 | /* Copy the rest of the name through, replacing $ constructs with values */ | |
2052 | for (p = nm; *p;) | |
2053 | if (*p != '$') | |
2054 | *x++ = *p++; | |
2055 | else | |
2056 | { | |
2057 | p++; | |
2058 | if (p == endp) | |
2059 | goto badsubst; | |
2060 | else if (*p == '$') | |
2061 | { | |
2062 | *x++ = *p++; | |
2063 | continue; | |
2064 | } | |
2065 | else if (*p == '{') | |
2066 | { | |
2067 | o = ++p; | |
2068 | while (p != endp && *p != '}') p++; | |
2069 | if (*p != '}') goto missingclose; | |
2070 | s = p++; | |
2071 | } | |
2072 | else | |
2073 | { | |
2074 | o = p; | |
2075 | while (p != endp && (isalnum (*p) || *p == '_')) p++; | |
2076 | s = p; | |
2077 | } | |
2078 | ||
2079 | /* Copy out the variable name */ | |
2080 | target = (unsigned char *) alloca (s - o + 1); | |
2081 | strncpy (target, o, s - o); | |
2082 | target[s - o] = 0; | |
5e570b75 | 2083 | #ifdef DOS_NT |
4c3c22f3 | 2084 | strupr (target); /* $home == $HOME etc. */ |
5e570b75 | 2085 | #endif /* DOS_NT */ |
570d7624 JB |
2086 | |
2087 | /* Get variable value */ | |
2088 | o = (unsigned char *) egetenv (target); | |
570d7624 JB |
2089 | if (!o) |
2090 | goto badvar; | |
2091 | ||
60d67b83 RS |
2092 | if (STRING_MULTIBYTE (filename)) |
2093 | { | |
2094 | /* If the original string is multibyte, | |
2095 | convert what we substitute into multibyte. */ | |
60d67b83 RS |
2096 | while (*o) |
2097 | { | |
ce51c54c KH |
2098 | int c = unibyte_char_to_multibyte (*o++); |
2099 | x += CHAR_STRING (c, x); | |
60d67b83 RS |
2100 | } |
2101 | } | |
2102 | else | |
2103 | { | |
2104 | strcpy (x, o); | |
2105 | x += strlen (o); | |
2106 | } | |
570d7624 JB |
2107 | } |
2108 | ||
2109 | *x = 0; | |
2110 | ||
82330e7f | 2111 | /* If /~ or // appears, discard everything through first slash. */ |
570d7624 JB |
2112 | |
2113 | for (p = xnm; p != x; p++) | |
5e570b75 | 2114 | if ((p[0] == '~' |
199607e4 | 2115 | #if defined (APOLLO) || defined (WINDOWSNT) |
5e570b75 | 2116 | || (IS_DIRECTORY_SEP (p[0]) && p - 1 != xnm) |
199607e4 RS |
2117 | #else /* not (APOLLO || WINDOWSNT) */ |
2118 | || IS_DIRECTORY_SEP (p[0]) | |
2119 | #endif /* not (APOLLO || WINDOWSNT) */ | |
570d7624 | 2120 | ) |
ac5b7072 | 2121 | && p != xnm && IS_DIRECTORY_SEP (p[-1])) |
570d7624 | 2122 | xnm = p; |
5e570b75 | 2123 | #ifdef DOS_NT |
199607e4 | 2124 | else if (IS_DRIVE (p[0]) && p[1] == ':' |
4488d7e1 | 2125 | && p > xnm && IS_DIRECTORY_SEP (p[-1])) |
199607e4 | 2126 | xnm = p; |
4c3c22f3 | 2127 | #endif |
570d7624 | 2128 | |
60d67b83 RS |
2129 | if (STRING_MULTIBYTE (filename)) |
2130 | return make_string (xnm, x - xnm); | |
2131 | return make_unibyte_string (xnm, x - xnm); | |
570d7624 JB |
2132 | |
2133 | badsubst: | |
2134 | error ("Bad format environment-variable substitution"); | |
2135 | missingclose: | |
2136 | error ("Missing \"}\" in environment-variable substitution"); | |
2137 | badvar: | |
2138 | error ("Substituting nonexistent environment variable \"%s\"", target); | |
2139 | ||
2140 | /* NOTREACHED */ | |
2141 | #endif /* not VMS */ | |
2142 | } | |
2143 | \f | |
067ffa38 | 2144 | /* A slightly faster and more convenient way to get |
298b760e | 2145 | (directory-file-name (expand-file-name FOO)). */ |
067ffa38 | 2146 | |
570d7624 JB |
2147 | Lisp_Object |
2148 | expand_and_dir_to_file (filename, defdir) | |
2149 | Lisp_Object filename, defdir; | |
2150 | { | |
199607e4 | 2151 | register Lisp_Object absname; |
570d7624 | 2152 | |
199607e4 | 2153 | absname = Fexpand_file_name (filename, defdir); |
570d7624 JB |
2154 | #ifdef VMS |
2155 | { | |
fc932ac6 | 2156 | register int c = XSTRING (absname)->data[STRING_BYTES (XSTRING (absname)) - 1]; |
570d7624 | 2157 | if (c == ':' || c == ']' || c == '>') |
199607e4 | 2158 | absname = Fdirectory_file_name (absname); |
570d7624 JB |
2159 | } |
2160 | #else | |
199607e4 | 2161 | /* Remove final slash, if any (unless this is the root dir). |
570d7624 | 2162 | stat behaves differently depending! */ |
199607e4 | 2163 | if (XSTRING (absname)->size > 1 |
fc932ac6 RS |
2164 | && IS_DIRECTORY_SEP (XSTRING (absname)->data[STRING_BYTES (XSTRING (absname)) - 1]) |
2165 | && !IS_DEVICE_SEP (XSTRING (absname)->data[STRING_BYTES (XSTRING (absname))-2])) | |
ddc61f46 | 2166 | /* We cannot take shortcuts; they might be wrong for magic file names. */ |
199607e4 | 2167 | absname = Fdirectory_file_name (absname); |
570d7624 | 2168 | #endif |
199607e4 | 2169 | return absname; |
570d7624 JB |
2170 | } |
2171 | \f | |
3ed15d97 RS |
2172 | /* Signal an error if the file ABSNAME already exists. |
2173 | If INTERACTIVE is nonzero, ask the user whether to proceed, | |
2174 | and bypass the error if the user says to go ahead. | |
2175 | QUERYSTRING is a name for the action that is being considered | |
2176 | to alter the file. | |
de1d0127 | 2177 | |
3ed15d97 | 2178 | *STATPTR is used to store the stat information if the file exists. |
de1d0127 | 2179 | If the file does not exist, STATPTR->st_mode is set to 0. |
b8b29dc9 RS |
2180 | If STATPTR is null, we don't store into it. |
2181 | ||
2182 | If QUICK is nonzero, we ask for y or n, not yes or no. */ | |
3ed15d97 | 2183 | |
c4df73f9 | 2184 | void |
b8b29dc9 | 2185 | barf_or_query_if_file_exists (absname, querystring, interactive, statptr, quick) |
570d7624 JB |
2186 | Lisp_Object absname; |
2187 | unsigned char *querystring; | |
2188 | int interactive; | |
3ed15d97 | 2189 | struct stat *statptr; |
b8b29dc9 | 2190 | int quick; |
570d7624 | 2191 | { |
643c73b9 | 2192 | register Lisp_Object tem, encoded_filename; |
4018b5ef | 2193 | struct stat statbuf; |
570d7624 JB |
2194 | struct gcpro gcpro1; |
2195 | ||
643c73b9 RS |
2196 | encoded_filename = ENCODE_FILE (absname); |
2197 | ||
4018b5ef RS |
2198 | /* stat is a good way to tell whether the file exists, |
2199 | regardless of what access permissions it has. */ | |
643c73b9 | 2200 | if (stat (XSTRING (encoded_filename)->data, &statbuf) >= 0) |
570d7624 JB |
2201 | { |
2202 | if (! interactive) | |
2203 | Fsignal (Qfile_already_exists, | |
2204 | Fcons (build_string ("File already exists"), | |
2205 | Fcons (absname, Qnil))); | |
2206 | GCPRO1 (absname); | |
b8b29dc9 RS |
2207 | tem = format1 ("File %s already exists; %s anyway? ", |
2208 | XSTRING (absname)->data, querystring); | |
2209 | if (quick) | |
2210 | tem = Fy_or_n_p (tem); | |
2211 | else | |
2212 | tem = do_yes_or_no_p (tem); | |
570d7624 | 2213 | UNGCPRO; |
265a9e55 | 2214 | if (NILP (tem)) |
570d7624 JB |
2215 | Fsignal (Qfile_already_exists, |
2216 | Fcons (build_string ("File already exists"), | |
2217 | Fcons (absname, Qnil))); | |
3ed15d97 RS |
2218 | if (statptr) |
2219 | *statptr = statbuf; | |
2220 | } | |
2221 | else | |
2222 | { | |
2223 | if (statptr) | |
2224 | statptr->st_mode = 0; | |
570d7624 JB |
2225 | } |
2226 | return; | |
2227 | } | |
2228 | ||
2229 | DEFUN ("copy-file", Fcopy_file, Scopy_file, 2, 4, | |
349a7710 | 2230 | "fCopy file: \nFCopy %s to file: \np\nP", |
570d7624 JB |
2231 | "Copy FILE to NEWNAME. Both args must be strings.\n\ |
2232 | Signals a `file-already-exists' error if file NEWNAME already exists,\n\ | |
2233 | unless a third argument OK-IF-ALREADY-EXISTS is supplied and non-nil.\n\ | |
2234 | A number as third arg means request confirmation if NEWNAME already exists.\n\ | |
2235 | This is what happens in interactive use with M-x.\n\ | |
349a7710 JB |
2236 | Fourth arg KEEP-TIME non-nil means give the new file the same\n\ |
2237 | last-modified time as the old one. (This works on only some systems.)\n\ | |
2238 | A prefix arg makes KEEP-TIME non-nil.") | |
3b7f6e60 EN |
2239 | (file, newname, ok_if_already_exists, keep_date) |
2240 | Lisp_Object file, newname, ok_if_already_exists, keep_date; | |
570d7624 JB |
2241 | { |
2242 | int ifd, ofd, n; | |
2243 | char buf[16 * 1024]; | |
3ed15d97 | 2244 | struct stat st, out_st; |
32f4334d | 2245 | Lisp_Object handler; |
b1d1b865 | 2246 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; |
b5148e85 | 2247 | int count = specpdl_ptr - specpdl; |
f73b0ada | 2248 | int input_file_statable_p; |
b1d1b865 | 2249 | Lisp_Object encoded_file, encoded_newname; |
570d7624 | 2250 | |
b1d1b865 RS |
2251 | encoded_file = encoded_newname = Qnil; |
2252 | GCPRO4 (file, newname, encoded_file, encoded_newname); | |
3b7f6e60 | 2253 | CHECK_STRING (file, 0); |
570d7624 | 2254 | CHECK_STRING (newname, 1); |
b1d1b865 | 2255 | |
3b7f6e60 | 2256 | file = Fexpand_file_name (file, Qnil); |
570d7624 | 2257 | newname = Fexpand_file_name (newname, Qnil); |
32f4334d | 2258 | |
0bf2eed2 | 2259 | /* If the input file name has special constructs in it, |
32f4334d | 2260 | call the corresponding file handler. */ |
3b7f6e60 | 2261 | handler = Ffind_file_name_handler (file, Qcopy_file); |
0bf2eed2 | 2262 | /* Likewise for output file name. */ |
51cf6d37 | 2263 | if (NILP (handler)) |
49307295 | 2264 | handler = Ffind_file_name_handler (newname, Qcopy_file); |
32f4334d | 2265 | if (!NILP (handler)) |
3b7f6e60 | 2266 | RETURN_UNGCPRO (call5 (handler, Qcopy_file, file, newname, |
36712b0a | 2267 | ok_if_already_exists, keep_date)); |
32f4334d | 2268 | |
b1d1b865 RS |
2269 | encoded_file = ENCODE_FILE (file); |
2270 | encoded_newname = ENCODE_FILE (newname); | |
2271 | ||
265a9e55 | 2272 | if (NILP (ok_if_already_exists) |
93c30b5f | 2273 | || INTEGERP (ok_if_already_exists)) |
b1d1b865 | 2274 | barf_or_query_if_file_exists (encoded_newname, "copy to it", |
b8b29dc9 | 2275 | INTEGERP (ok_if_already_exists), &out_st, 0); |
b1d1b865 | 2276 | else if (stat (XSTRING (encoded_newname)->data, &out_st) < 0) |
3ed15d97 | 2277 | out_st.st_mode = 0; |
570d7624 | 2278 | |
68c45bf0 | 2279 | ifd = emacs_open (XSTRING (encoded_file)->data, O_RDONLY, 0); |
570d7624 | 2280 | if (ifd < 0) |
3b7f6e60 | 2281 | report_file_error ("Opening input file", Fcons (file, Qnil)); |
570d7624 | 2282 | |
b5148e85 RS |
2283 | record_unwind_protect (close_file_unwind, make_number (ifd)); |
2284 | ||
f73b0ada BF |
2285 | /* We can only copy regular files and symbolic links. Other files are not |
2286 | copyable by us. */ | |
2287 | input_file_statable_p = (fstat (ifd, &st) >= 0); | |
2288 | ||
f9ba66ce | 2289 | #if !defined (DOS_NT) || __DJGPP__ > 1 |
3ed15d97 RS |
2290 | if (out_st.st_mode != 0 |
2291 | && st.st_dev == out_st.st_dev && st.st_ino == out_st.st_ino) | |
2292 | { | |
2293 | errno = 0; | |
2294 | report_file_error ("Input and output files are the same", | |
3b7f6e60 | 2295 | Fcons (file, Fcons (newname, Qnil))); |
3ed15d97 RS |
2296 | } |
2297 | #endif | |
2298 | ||
f73b0ada BF |
2299 | #if defined (S_ISREG) && defined (S_ISLNK) |
2300 | if (input_file_statable_p) | |
2301 | { | |
2302 | if (!(S_ISREG (st.st_mode)) && !(S_ISLNK (st.st_mode))) | |
2303 | { | |
2304 | #if defined (EISDIR) | |
2305 | /* Get a better looking error message. */ | |
2306 | errno = EISDIR; | |
2307 | #endif /* EISDIR */ | |
3b7f6e60 | 2308 | report_file_error ("Non-regular file", Fcons (file, Qnil)); |
f73b0ada BF |
2309 | } |
2310 | } | |
2311 | #endif /* S_ISREG && S_ISLNK */ | |
2312 | ||
570d7624 JB |
2313 | #ifdef VMS |
2314 | /* Create the copy file with the same record format as the input file */ | |
b1d1b865 | 2315 | ofd = sys_creat (XSTRING (encoded_newname)->data, 0666, ifd); |
570d7624 | 2316 | #else |
4c3c22f3 RS |
2317 | #ifdef MSDOS |
2318 | /* System's default file type was set to binary by _fmode in emacs.c. */ | |
b1d1b865 | 2319 | ofd = creat (XSTRING (encoded_newname)->data, S_IREAD | S_IWRITE); |
4c3c22f3 | 2320 | #else /* not MSDOS */ |
b1d1b865 | 2321 | ofd = creat (XSTRING (encoded_newname)->data, 0666); |
4c3c22f3 | 2322 | #endif /* not MSDOS */ |
570d7624 JB |
2323 | #endif /* VMS */ |
2324 | if (ofd < 0) | |
3ed15d97 | 2325 | report_file_error ("Opening output file", Fcons (newname, Qnil)); |
b5148e85 RS |
2326 | |
2327 | record_unwind_protect (close_file_unwind, make_number (ofd)); | |
570d7624 | 2328 | |
b5148e85 RS |
2329 | immediate_quit = 1; |
2330 | QUIT; | |
68c45bf0 PE |
2331 | while ((n = emacs_read (ifd, buf, sizeof buf)) > 0) |
2332 | if (emacs_write (ofd, buf, n) != n) | |
3ed15d97 | 2333 | report_file_error ("I/O error", Fcons (newname, Qnil)); |
b5148e85 | 2334 | immediate_quit = 0; |
570d7624 | 2335 | |
5acac34e | 2336 | /* Closing the output clobbers the file times on some systems. */ |
68c45bf0 | 2337 | if (emacs_close (ofd) < 0) |
5acac34e RS |
2338 | report_file_error ("I/O error", Fcons (newname, Qnil)); |
2339 | ||
f73b0ada | 2340 | if (input_file_statable_p) |
570d7624 | 2341 | { |
265a9e55 | 2342 | if (!NILP (keep_date)) |
570d7624 | 2343 | { |
de5bf5d3 JB |
2344 | EMACS_TIME atime, mtime; |
2345 | EMACS_SET_SECS_USECS (atime, st.st_atime, 0); | |
2346 | EMACS_SET_SECS_USECS (mtime, st.st_mtime, 0); | |
b1d1b865 RS |
2347 | if (set_file_times (XSTRING (encoded_newname)->data, |
2348 | atime, mtime)) | |
c0b7b21c | 2349 | Fsignal (Qfile_date_error, |
d1b9ed63 | 2350 | Fcons (build_string ("Cannot set file date"), |
3dbcf3f6 | 2351 | Fcons (newname, Qnil))); |
570d7624 | 2352 | } |
2dc3be7e | 2353 | #ifndef MSDOS |
b1d1b865 | 2354 | chmod (XSTRING (encoded_newname)->data, st.st_mode & 07777); |
2dc3be7e RS |
2355 | #else /* MSDOS */ |
2356 | #if defined (__DJGPP__) && __DJGPP__ > 1 | |
2357 | /* In DJGPP v2.0 and later, fstat usually returns true file mode bits, | |
2358 | and if it can't, it tells so. Otherwise, under MSDOS we usually | |
2359 | get only the READ bit, which will make the copied file read-only, | |
2360 | so it's better not to chmod at all. */ | |
2361 | if ((_djstat_flags & _STFAIL_WRITEBIT) == 0) | |
b1d1b865 | 2362 | chmod (XSTRING (encoded_newname)->data, st.st_mode & 07777); |
2dc3be7e RS |
2363 | #endif /* DJGPP version 2 or newer */ |
2364 | #endif /* MSDOS */ | |
570d7624 JB |
2365 | } |
2366 | ||
68c45bf0 | 2367 | emacs_close (ifd); |
5acac34e | 2368 | |
b5148e85 RS |
2369 | /* Discard the unwind protects. */ |
2370 | specpdl_ptr = specpdl + count; | |
2371 | ||
570d7624 JB |
2372 | UNGCPRO; |
2373 | return Qnil; | |
2374 | } | |
385b6cc7 | 2375 | \f |
9bbe01fb | 2376 | DEFUN ("make-directory-internal", Fmake_directory_internal, |
353cfc19 | 2377 | Smake_directory_internal, 1, 1, 0, |
3b7f6e60 EN |
2378 | "Create a new directory named DIRECTORY.") |
2379 | (directory) | |
2380 | Lisp_Object directory; | |
570d7624 JB |
2381 | { |
2382 | unsigned char *dir; | |
32f4334d | 2383 | Lisp_Object handler; |
b1d1b865 | 2384 | Lisp_Object encoded_dir; |
570d7624 | 2385 | |
3b7f6e60 EN |
2386 | CHECK_STRING (directory, 0); |
2387 | directory = Fexpand_file_name (directory, Qnil); | |
32f4334d | 2388 | |
3b7f6e60 | 2389 | handler = Ffind_file_name_handler (directory, Qmake_directory_internal); |
32f4334d | 2390 | if (!NILP (handler)) |
3b7f6e60 | 2391 | return call2 (handler, Qmake_directory_internal, directory); |
9bbe01fb | 2392 | |
b1d1b865 RS |
2393 | encoded_dir = ENCODE_FILE (directory); |
2394 | ||
2395 | dir = XSTRING (encoded_dir)->data; | |
570d7624 | 2396 | |
5e570b75 RS |
2397 | #ifdef WINDOWSNT |
2398 | if (mkdir (dir) != 0) | |
2399 | #else | |
570d7624 | 2400 | if (mkdir (dir, 0777) != 0) |
5e570b75 | 2401 | #endif |
3b7f6e60 | 2402 | report_file_error ("Creating directory", Flist (1, &directory)); |
570d7624 | 2403 | |
32f4334d | 2404 | return Qnil; |
570d7624 JB |
2405 | } |
2406 | ||
aa734e17 | 2407 | DEFUN ("delete-directory", Fdelete_directory, Sdelete_directory, 1, 1, "FDelete directory: ", |
3b7f6e60 EN |
2408 | "Delete the directory named DIRECTORY.") |
2409 | (directory) | |
2410 | Lisp_Object directory; | |
570d7624 JB |
2411 | { |
2412 | unsigned char *dir; | |
32f4334d | 2413 | Lisp_Object handler; |
b1d1b865 | 2414 | Lisp_Object encoded_dir; |
570d7624 | 2415 | |
3b7f6e60 EN |
2416 | CHECK_STRING (directory, 0); |
2417 | directory = Fdirectory_file_name (Fexpand_file_name (directory, Qnil)); | |
570d7624 | 2418 | |
3b7f6e60 | 2419 | handler = Ffind_file_name_handler (directory, Qdelete_directory); |
32f4334d | 2420 | if (!NILP (handler)) |
3b7f6e60 | 2421 | return call2 (handler, Qdelete_directory, directory); |
32f4334d | 2422 | |
b1d1b865 RS |
2423 | encoded_dir = ENCODE_FILE (directory); |
2424 | ||
2425 | dir = XSTRING (encoded_dir)->data; | |
2426 | ||
570d7624 | 2427 | if (rmdir (dir) != 0) |
3b7f6e60 | 2428 | report_file_error ("Removing directory", Flist (1, &directory)); |
570d7624 JB |
2429 | |
2430 | return Qnil; | |
2431 | } | |
2432 | ||
2433 | DEFUN ("delete-file", Fdelete_file, Sdelete_file, 1, 1, "fDelete file: ", | |
3b7f6e60 | 2434 | "Delete file named FILENAME.\n\ |
570d7624 JB |
2435 | If file has multiple names, it continues to exist with the other names.") |
2436 | (filename) | |
2437 | Lisp_Object filename; | |
2438 | { | |
32f4334d | 2439 | Lisp_Object handler; |
b1d1b865 RS |
2440 | Lisp_Object encoded_file; |
2441 | ||
570d7624 JB |
2442 | CHECK_STRING (filename, 0); |
2443 | filename = Fexpand_file_name (filename, Qnil); | |
32f4334d | 2444 | |
49307295 | 2445 | handler = Ffind_file_name_handler (filename, Qdelete_file); |
32f4334d | 2446 | if (!NILP (handler)) |
8a9b0da9 | 2447 | return call2 (handler, Qdelete_file, filename); |
32f4334d | 2448 | |
b1d1b865 RS |
2449 | encoded_file = ENCODE_FILE (filename); |
2450 | ||
2451 | if (0 > unlink (XSTRING (encoded_file)->data)) | |
570d7624 | 2452 | report_file_error ("Removing old name", Flist (1, &filename)); |
8a9b0da9 | 2453 | return Qnil; |
570d7624 JB |
2454 | } |
2455 | ||
385b6cc7 RS |
2456 | static Lisp_Object |
2457 | internal_delete_file_1 (ignore) | |
2458 | Lisp_Object ignore; | |
2459 | { | |
2460 | return Qt; | |
2461 | } | |
2462 | ||
2463 | /* Delete file FILENAME, returning 1 if successful and 0 if failed. */ | |
2464 | ||
2465 | int | |
2466 | internal_delete_file (filename) | |
2467 | Lisp_Object filename; | |
2468 | { | |
2469 | return NILP (internal_condition_case_1 (Fdelete_file, filename, | |
2470 | Qt, internal_delete_file_1)); | |
2471 | } | |
2472 | \f | |
570d7624 JB |
2473 | DEFUN ("rename-file", Frename_file, Srename_file, 2, 3, |
2474 | "fRename file: \nFRename %s to file: \np", | |
2475 | "Rename FILE as NEWNAME. Both args strings.\n\ | |
2476 | If file has names other than FILE, it continues to have those names.\n\ | |
2477 | Signals a `file-already-exists' error if a file NEWNAME already exists\n\ | |
2478 | unless optional third argument OK-IF-ALREADY-EXISTS is non-nil.\n\ | |
2479 | A number as third arg means request confirmation if NEWNAME already exists.\n\ | |
2480 | This is what happens in interactive use with M-x.") | |
3b7f6e60 EN |
2481 | (file, newname, ok_if_already_exists) |
2482 | Lisp_Object file, newname, ok_if_already_exists; | |
570d7624 JB |
2483 | { |
2484 | #ifdef NO_ARG_ARRAY | |
2485 | Lisp_Object args[2]; | |
2486 | #endif | |
32f4334d | 2487 | Lisp_Object handler; |
b1d1b865 RS |
2488 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; |
2489 | Lisp_Object encoded_file, encoded_newname; | |
570d7624 | 2490 | |
b1d1b865 RS |
2491 | encoded_file = encoded_newname = Qnil; |
2492 | GCPRO4 (file, newname, encoded_file, encoded_newname); | |
3b7f6e60 | 2493 | CHECK_STRING (file, 0); |
570d7624 | 2494 | CHECK_STRING (newname, 1); |
3b7f6e60 | 2495 | file = Fexpand_file_name (file, Qnil); |
570d7624 | 2496 | newname = Fexpand_file_name (newname, Qnil); |
32f4334d RS |
2497 | |
2498 | /* If the file name has special constructs in it, | |
2499 | call the corresponding file handler. */ | |
3b7f6e60 | 2500 | handler = Ffind_file_name_handler (file, Qrename_file); |
51cf6d37 | 2501 | if (NILP (handler)) |
49307295 | 2502 | handler = Ffind_file_name_handler (newname, Qrename_file); |
32f4334d | 2503 | if (!NILP (handler)) |
36712b0a | 2504 | RETURN_UNGCPRO (call4 (handler, Qrename_file, |
3b7f6e60 | 2505 | file, newname, ok_if_already_exists)); |
32f4334d | 2506 | |
b1d1b865 RS |
2507 | encoded_file = ENCODE_FILE (file); |
2508 | encoded_newname = ENCODE_FILE (newname); | |
2509 | ||
265a9e55 | 2510 | if (NILP (ok_if_already_exists) |
93c30b5f | 2511 | || INTEGERP (ok_if_already_exists)) |
b1d1b865 | 2512 | barf_or_query_if_file_exists (encoded_newname, "rename to it", |
b8b29dc9 | 2513 | INTEGERP (ok_if_already_exists), 0, 0); |
570d7624 | 2514 | #ifndef BSD4_1 |
b1d1b865 | 2515 | if (0 > rename (XSTRING (encoded_file)->data, XSTRING (encoded_newname)->data)) |
570d7624 | 2516 | #else |
b1d1b865 RS |
2517 | if (0 > link (XSTRING (encoded_file)->data, XSTRING (encoded_newname)->data) |
2518 | || 0 > unlink (XSTRING (encoded_file)->data)) | |
570d7624 JB |
2519 | #endif |
2520 | { | |
2521 | if (errno == EXDEV) | |
2522 | { | |
3b7f6e60 | 2523 | Fcopy_file (file, newname, |
d093c3ac RM |
2524 | /* We have already prompted if it was an integer, |
2525 | so don't have copy-file prompt again. */ | |
2526 | NILP (ok_if_already_exists) ? Qnil : Qt, Qt); | |
3b7f6e60 | 2527 | Fdelete_file (file); |
570d7624 JB |
2528 | } |
2529 | else | |
2530 | #ifdef NO_ARG_ARRAY | |
2531 | { | |
3b7f6e60 | 2532 | args[0] = file; |
570d7624 JB |
2533 | args[1] = newname; |
2534 | report_file_error ("Renaming", Flist (2, args)); | |
2535 | } | |
2536 | #else | |
3b7f6e60 | 2537 | report_file_error ("Renaming", Flist (2, &file)); |
570d7624 JB |
2538 | #endif |
2539 | } | |
2540 | UNGCPRO; | |
2541 | return Qnil; | |
2542 | } | |
2543 | ||
2544 | DEFUN ("add-name-to-file", Fadd_name_to_file, Sadd_name_to_file, 2, 3, | |
2545 | "fAdd name to file: \nFName to add to %s: \np", | |
2546 | "Give FILE additional name NEWNAME. Both args strings.\n\ | |
2547 | Signals a `file-already-exists' error if a file NEWNAME already exists\n\ | |
2548 | unless optional third argument OK-IF-ALREADY-EXISTS is non-nil.\n\ | |
2549 | A number as third arg means request confirmation if NEWNAME already exists.\n\ | |
2550 | This is what happens in interactive use with M-x.") | |
3b7f6e60 EN |
2551 | (file, newname, ok_if_already_exists) |
2552 | Lisp_Object file, newname, ok_if_already_exists; | |
570d7624 JB |
2553 | { |
2554 | #ifdef NO_ARG_ARRAY | |
2555 | Lisp_Object args[2]; | |
2556 | #endif | |
32f4334d | 2557 | Lisp_Object handler; |
b1d1b865 RS |
2558 | Lisp_Object encoded_file, encoded_newname; |
2559 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; | |
570d7624 | 2560 | |
b1d1b865 RS |
2561 | GCPRO4 (file, newname, encoded_file, encoded_newname); |
2562 | encoded_file = encoded_newname = Qnil; | |
3b7f6e60 | 2563 | CHECK_STRING (file, 0); |
570d7624 | 2564 | CHECK_STRING (newname, 1); |
3b7f6e60 | 2565 | file = Fexpand_file_name (file, Qnil); |
570d7624 | 2566 | newname = Fexpand_file_name (newname, Qnil); |
32f4334d RS |
2567 | |
2568 | /* If the file name has special constructs in it, | |
2569 | call the corresponding file handler. */ | |
3b7f6e60 | 2570 | handler = Ffind_file_name_handler (file, Qadd_name_to_file); |
32f4334d | 2571 | if (!NILP (handler)) |
3b7f6e60 | 2572 | RETURN_UNGCPRO (call4 (handler, Qadd_name_to_file, file, |
36712b0a | 2573 | newname, ok_if_already_exists)); |
32f4334d | 2574 | |
adc6741c RS |
2575 | /* If the new name has special constructs in it, |
2576 | call the corresponding file handler. */ | |
2577 | handler = Ffind_file_name_handler (newname, Qadd_name_to_file); | |
2578 | if (!NILP (handler)) | |
3b7f6e60 | 2579 | RETURN_UNGCPRO (call4 (handler, Qadd_name_to_file, file, |
adc6741c RS |
2580 | newname, ok_if_already_exists)); |
2581 | ||
b1d1b865 RS |
2582 | encoded_file = ENCODE_FILE (file); |
2583 | encoded_newname = ENCODE_FILE (newname); | |
2584 | ||
265a9e55 | 2585 | if (NILP (ok_if_already_exists) |
93c30b5f | 2586 | || INTEGERP (ok_if_already_exists)) |
b1d1b865 | 2587 | barf_or_query_if_file_exists (encoded_newname, "make it a new name", |
b8b29dc9 | 2588 | INTEGERP (ok_if_already_exists), 0, 0); |
5e570b75 | 2589 | |
570d7624 | 2590 | unlink (XSTRING (newname)->data); |
b1d1b865 | 2591 | if (0 > link (XSTRING (encoded_file)->data, XSTRING (encoded_newname)->data)) |
570d7624 JB |
2592 | { |
2593 | #ifdef NO_ARG_ARRAY | |
3b7f6e60 | 2594 | args[0] = file; |
570d7624 JB |
2595 | args[1] = newname; |
2596 | report_file_error ("Adding new name", Flist (2, args)); | |
2597 | #else | |
3b7f6e60 | 2598 | report_file_error ("Adding new name", Flist (2, &file)); |
570d7624 JB |
2599 | #endif |
2600 | } | |
2601 | ||
2602 | UNGCPRO; | |
2603 | return Qnil; | |
2604 | } | |
2605 | ||
2606 | #ifdef S_IFLNK | |
2607 | DEFUN ("make-symbolic-link", Fmake_symbolic_link, Smake_symbolic_link, 2, 3, | |
2608 | "FMake symbolic link to file: \nFMake symbolic link to file %s: \np", | |
2609 | "Make a symbolic link to FILENAME, named LINKNAME. Both args strings.\n\ | |
11183104 | 2610 | Signals a `file-already-exists' error if a file LINKNAME already exists\n\ |
570d7624 | 2611 | unless optional third argument OK-IF-ALREADY-EXISTS is non-nil.\n\ |
11183104 | 2612 | A number as third arg means request confirmation if LINKNAME already exists.\n\ |
570d7624 | 2613 | This happens for interactive use with M-x.") |
e5d77022 JB |
2614 | (filename, linkname, ok_if_already_exists) |
2615 | Lisp_Object filename, linkname, ok_if_already_exists; | |
570d7624 JB |
2616 | { |
2617 | #ifdef NO_ARG_ARRAY | |
2618 | Lisp_Object args[2]; | |
2619 | #endif | |
32f4334d | 2620 | Lisp_Object handler; |
b1d1b865 RS |
2621 | Lisp_Object encoded_filename, encoded_linkname; |
2622 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; | |
570d7624 | 2623 | |
b1d1b865 RS |
2624 | GCPRO4 (filename, linkname, encoded_filename, encoded_linkname); |
2625 | encoded_filename = encoded_linkname = Qnil; | |
570d7624 | 2626 | CHECK_STRING (filename, 0); |
e5d77022 | 2627 | CHECK_STRING (linkname, 1); |
d9bc1c99 RS |
2628 | /* If the link target has a ~, we must expand it to get |
2629 | a truly valid file name. Otherwise, do not expand; | |
2630 | we want to permit links to relative file names. */ | |
2631 | if (XSTRING (filename)->data[0] == '~') | |
2632 | filename = Fexpand_file_name (filename, Qnil); | |
e5d77022 | 2633 | linkname = Fexpand_file_name (linkname, Qnil); |
32f4334d RS |
2634 | |
2635 | /* If the file name has special constructs in it, | |
2636 | call the corresponding file handler. */ | |
49307295 | 2637 | handler = Ffind_file_name_handler (filename, Qmake_symbolic_link); |
32f4334d | 2638 | if (!NILP (handler)) |
36712b0a KH |
2639 | RETURN_UNGCPRO (call4 (handler, Qmake_symbolic_link, filename, |
2640 | linkname, ok_if_already_exists)); | |
32f4334d | 2641 | |
adc6741c RS |
2642 | /* If the new link name has special constructs in it, |
2643 | call the corresponding file handler. */ | |
2644 | handler = Ffind_file_name_handler (linkname, Qmake_symbolic_link); | |
2645 | if (!NILP (handler)) | |
2646 | RETURN_UNGCPRO (call4 (handler, Qmake_symbolic_link, filename, | |
2647 | linkname, ok_if_already_exists)); | |
2648 | ||
b1d1b865 RS |
2649 | encoded_filename = ENCODE_FILE (filename); |
2650 | encoded_linkname = ENCODE_FILE (linkname); | |
2651 | ||
265a9e55 | 2652 | if (NILP (ok_if_already_exists) |
93c30b5f | 2653 | || INTEGERP (ok_if_already_exists)) |
b1d1b865 | 2654 | barf_or_query_if_file_exists (encoded_linkname, "make it a link", |
b8b29dc9 | 2655 | INTEGERP (ok_if_already_exists), 0, 0); |
b1d1b865 RS |
2656 | if (0 > symlink (XSTRING (encoded_filename)->data, |
2657 | XSTRING (encoded_linkname)->data)) | |
570d7624 JB |
2658 | { |
2659 | /* If we didn't complain already, silently delete existing file. */ | |
2660 | if (errno == EEXIST) | |
2661 | { | |
b1d1b865 RS |
2662 | unlink (XSTRING (encoded_linkname)->data); |
2663 | if (0 <= symlink (XSTRING (encoded_filename)->data, | |
2664 | XSTRING (encoded_linkname)->data)) | |
1a04498e KH |
2665 | { |
2666 | UNGCPRO; | |
2667 | return Qnil; | |
2668 | } | |
570d7624 JB |
2669 | } |
2670 | ||
2671 | #ifdef NO_ARG_ARRAY | |
2672 | args[0] = filename; | |
e5d77022 | 2673 | args[1] = linkname; |
570d7624 JB |
2674 | report_file_error ("Making symbolic link", Flist (2, args)); |
2675 | #else | |
2676 | report_file_error ("Making symbolic link", Flist (2, &filename)); | |
2677 | #endif | |
2678 | } | |
2679 | UNGCPRO; | |
2680 | return Qnil; | |
2681 | } | |
2682 | #endif /* S_IFLNK */ | |
2683 | ||
2684 | #ifdef VMS | |
2685 | ||
2686 | DEFUN ("define-logical-name", Fdefine_logical_name, Sdefine_logical_name, | |
2687 | 2, 2, "sDefine logical name: \nsDefine logical name %s as: ", | |
2688 | "Define the job-wide logical name NAME to have the value STRING.\n\ | |
2689 | If STRING is nil or a null string, the logical name NAME is deleted.") | |
3b7f6e60 EN |
2690 | (name, string) |
2691 | Lisp_Object name; | |
570d7624 JB |
2692 | Lisp_Object string; |
2693 | { | |
3b7f6e60 | 2694 | CHECK_STRING (name, 0); |
265a9e55 | 2695 | if (NILP (string)) |
3b7f6e60 | 2696 | delete_logical_name (XSTRING (name)->data); |
570d7624 JB |
2697 | else |
2698 | { | |
2699 | CHECK_STRING (string, 1); | |
2700 | ||
2701 | if (XSTRING (string)->size == 0) | |
3b7f6e60 | 2702 | delete_logical_name (XSTRING (name)->data); |
570d7624 | 2703 | else |
3b7f6e60 | 2704 | define_logical_name (XSTRING (name)->data, XSTRING (string)->data); |
570d7624 JB |
2705 | } |
2706 | ||
2707 | return string; | |
2708 | } | |
2709 | #endif /* VMS */ | |
2710 | ||
2711 | #ifdef HPUX_NET | |
2712 | ||
2713 | DEFUN ("sysnetunam", Fsysnetunam, Ssysnetunam, 2, 2, 0, | |
2714 | "Open a network connection to PATH using LOGIN as the login string.") | |
2715 | (path, login) | |
2716 | Lisp_Object path, login; | |
2717 | { | |
2718 | int netresult; | |
199607e4 | 2719 | |
570d7624 | 2720 | CHECK_STRING (path, 0); |
199607e4 RS |
2721 | CHECK_STRING (login, 0); |
2722 | ||
570d7624 JB |
2723 | netresult = netunam (XSTRING (path)->data, XSTRING (login)->data); |
2724 | ||
2725 | if (netresult == -1) | |
2726 | return Qnil; | |
2727 | else | |
2728 | return Qt; | |
2729 | } | |
2730 | #endif /* HPUX_NET */ | |
2731 | \f | |
2732 | DEFUN ("file-name-absolute-p", Ffile_name_absolute_p, Sfile_name_absolute_p, | |
2733 | 1, 1, 0, | |
199607e4 | 2734 | "Return t if file FILENAME specifies an absolute file name.\n\ |
570d7624 JB |
2735 | On Unix, this is a name starting with a `/' or a `~'.") |
2736 | (filename) | |
2737 | Lisp_Object filename; | |
2738 | { | |
2739 | unsigned char *ptr; | |
2740 | ||
2741 | CHECK_STRING (filename, 0); | |
2742 | ptr = XSTRING (filename)->data; | |
5e570b75 | 2743 | if (IS_DIRECTORY_SEP (*ptr) || *ptr == '~' |
570d7624 JB |
2744 | #ifdef VMS |
2745 | /* ??? This criterion is probably wrong for '<'. */ | |
2746 | || index (ptr, ':') || index (ptr, '<') | |
2747 | || (*ptr == '[' && (ptr[1] != '-' || (ptr[2] != '.' && ptr[2] != ']')) | |
2748 | && ptr[1] != '.') | |
2749 | #endif /* VMS */ | |
5e570b75 | 2750 | #ifdef DOS_NT |
199607e4 | 2751 | || (IS_DRIVE (*ptr) && ptr[1] == ':' && IS_DIRECTORY_SEP (ptr[2])) |
4c3c22f3 | 2752 | #endif |
570d7624 JB |
2753 | ) |
2754 | return Qt; | |
2755 | else | |
2756 | return Qnil; | |
2757 | } | |
3beeedfe RS |
2758 | \f |
2759 | /* Return nonzero if file FILENAME exists and can be executed. */ | |
2760 | ||
2761 | static int | |
2762 | check_executable (filename) | |
2763 | char *filename; | |
2764 | { | |
3be3c08e RS |
2765 | #ifdef DOS_NT |
2766 | int len = strlen (filename); | |
2767 | char *suffix; | |
2768 | struct stat st; | |
2769 | if (stat (filename, &st) < 0) | |
2770 | return 0; | |
34ead71a | 2771 | #if defined (WINDOWSNT) || (defined (MSDOS) && __DJGPP__ > 1) |
199607e4 RS |
2772 | return ((st.st_mode & S_IEXEC) != 0); |
2773 | #else | |
3be3c08e RS |
2774 | return (S_ISREG (st.st_mode) |
2775 | && len >= 5 | |
2776 | && (stricmp ((suffix = filename + len-4), ".com") == 0 | |
2777 | || stricmp (suffix, ".exe") == 0 | |
2dc3be7e RS |
2778 | || stricmp (suffix, ".bat") == 0) |
2779 | || (st.st_mode & S_IFMT) == S_IFDIR); | |
199607e4 | 2780 | #endif /* not WINDOWSNT */ |
3be3c08e | 2781 | #else /* not DOS_NT */ |
de0be7dd RS |
2782 | #ifdef HAVE_EUIDACCESS |
2783 | return (euidaccess (filename, 1) >= 0); | |
3beeedfe RS |
2784 | #else |
2785 | /* Access isn't quite right because it uses the real uid | |
2786 | and we really want to test with the effective uid. | |
2787 | But Unix doesn't give us a right way to do it. */ | |
2788 | return (access (filename, 1) >= 0); | |
2789 | #endif | |
3be3c08e | 2790 | #endif /* not DOS_NT */ |
3beeedfe RS |
2791 | } |
2792 | ||
2793 | /* Return nonzero if file FILENAME exists and can be written. */ | |
2794 | ||
2795 | static int | |
2796 | check_writable (filename) | |
2797 | char *filename; | |
2798 | { | |
3be3c08e RS |
2799 | #ifdef MSDOS |
2800 | struct stat st; | |
2801 | if (stat (filename, &st) < 0) | |
2802 | return 0; | |
2803 | return (st.st_mode & S_IWRITE || (st.st_mode & S_IFMT) == S_IFDIR); | |
2804 | #else /* not MSDOS */ | |
41f3fb38 KH |
2805 | #ifdef HAVE_EUIDACCESS |
2806 | return (euidaccess (filename, 2) >= 0); | |
3beeedfe RS |
2807 | #else |
2808 | /* Access isn't quite right because it uses the real uid | |
2809 | and we really want to test with the effective uid. | |
2810 | But Unix doesn't give us a right way to do it. | |
2811 | Opening with O_WRONLY could work for an ordinary file, | |
2812 | but would lose for directories. */ | |
2813 | return (access (filename, 2) >= 0); | |
2814 | #endif | |
3be3c08e | 2815 | #endif /* not MSDOS */ |
3beeedfe | 2816 | } |
570d7624 JB |
2817 | |
2818 | DEFUN ("file-exists-p", Ffile_exists_p, Sfile_exists_p, 1, 1, 0, | |
2819 | "Return t if file FILENAME exists. (This does not mean you can read it.)\n\ | |
2820 | See also `file-readable-p' and `file-attributes'.") | |
2821 | (filename) | |
2822 | Lisp_Object filename; | |
2823 | { | |
199607e4 | 2824 | Lisp_Object absname; |
32f4334d | 2825 | Lisp_Object handler; |
4018b5ef | 2826 | struct stat statbuf; |
570d7624 JB |
2827 | |
2828 | CHECK_STRING (filename, 0); | |
199607e4 | 2829 | absname = Fexpand_file_name (filename, Qnil); |
32f4334d RS |
2830 | |
2831 | /* If the file name has special constructs in it, | |
2832 | call the corresponding file handler. */ | |
199607e4 | 2833 | handler = Ffind_file_name_handler (absname, Qfile_exists_p); |
32f4334d | 2834 | if (!NILP (handler)) |
199607e4 | 2835 | return call2 (handler, Qfile_exists_p, absname); |
32f4334d | 2836 | |
b1d1b865 RS |
2837 | absname = ENCODE_FILE (absname); |
2838 | ||
199607e4 | 2839 | return (stat (XSTRING (absname)->data, &statbuf) >= 0) ? Qt : Qnil; |
570d7624 JB |
2840 | } |
2841 | ||
2842 | DEFUN ("file-executable-p", Ffile_executable_p, Sfile_executable_p, 1, 1, 0, | |
2843 | "Return t if FILENAME can be executed by you.\n\ | |
8b235fde | 2844 | For a directory, this means you can access files in that directory.") |
570d7624 JB |
2845 | (filename) |
2846 | Lisp_Object filename; | |
2847 | ||
2848 | { | |
199607e4 | 2849 | Lisp_Object absname; |
32f4334d | 2850 | Lisp_Object handler; |
570d7624 JB |
2851 | |
2852 | CHECK_STRING (filename, 0); | |
199607e4 | 2853 | absname = Fexpand_file_name (filename, Qnil); |
32f4334d RS |
2854 | |
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_executable_p); |
32f4334d | 2858 | if (!NILP (handler)) |
199607e4 | 2859 | return call2 (handler, Qfile_executable_p, absname); |
32f4334d | 2860 | |
b1d1b865 RS |
2861 | absname = ENCODE_FILE (absname); |
2862 | ||
199607e4 | 2863 | return (check_executable (XSTRING (absname)->data) ? Qt : Qnil); |
570d7624 JB |
2864 | } |
2865 | ||
2866 | DEFUN ("file-readable-p", Ffile_readable_p, Sfile_readable_p, 1, 1, 0, | |
2867 | "Return t if file FILENAME exists and you can read it.\n\ | |
2868 | See also `file-exists-p' and `file-attributes'.") | |
2869 | (filename) | |
2870 | Lisp_Object filename; | |
2871 | { | |
199607e4 | 2872 | Lisp_Object absname; |
32f4334d | 2873 | Lisp_Object handler; |
4018b5ef | 2874 | int desc; |
bb369dc6 RS |
2875 | int flags; |
2876 | struct stat statbuf; | |
570d7624 JB |
2877 | |
2878 | CHECK_STRING (filename, 0); | |
199607e4 | 2879 | absname = Fexpand_file_name (filename, Qnil); |
32f4334d RS |
2880 | |
2881 | /* If the file name has special constructs in it, | |
2882 | call the corresponding file handler. */ | |
199607e4 | 2883 | handler = Ffind_file_name_handler (absname, Qfile_readable_p); |
32f4334d | 2884 | if (!NILP (handler)) |
199607e4 | 2885 | return call2 (handler, Qfile_readable_p, absname); |
32f4334d | 2886 | |
b1d1b865 RS |
2887 | absname = ENCODE_FILE (absname); |
2888 | ||
199607e4 RS |
2889 | #ifdef DOS_NT |
2890 | /* Under MS-DOS and Windows, open does not work for directories. */ | |
2891 | if (access (XSTRING (absname)->data, 0) == 0) | |
a8a7d065 RS |
2892 | return Qt; |
2893 | return Qnil; | |
199607e4 | 2894 | #else /* not DOS_NT */ |
bb369dc6 RS |
2895 | flags = O_RDONLY; |
2896 | #if defined (S_ISFIFO) && defined (O_NONBLOCK) | |
2897 | /* Opening a fifo without O_NONBLOCK can wait. | |
2898 | We don't want to wait. But we don't want to mess wth O_NONBLOCK | |
2899 | except in the case of a fifo, on a system which handles it. */ | |
2900 | desc = stat (XSTRING (absname)->data, &statbuf); | |
2901 | if (desc < 0) | |
2902 | return Qnil; | |
2903 | if (S_ISFIFO (statbuf.st_mode)) | |
2904 | flags |= O_NONBLOCK; | |
2905 | #endif | |
68c45bf0 | 2906 | desc = emacs_open (XSTRING (absname)->data, flags, 0); |
4018b5ef RS |
2907 | if (desc < 0) |
2908 | return Qnil; | |
68c45bf0 | 2909 | emacs_close (desc); |
4018b5ef | 2910 | return Qt; |
199607e4 | 2911 | #endif /* not DOS_NT */ |
570d7624 JB |
2912 | } |
2913 | ||
f793dc6c RS |
2914 | /* Having this before file-symlink-p mysteriously caused it to be forgotten |
2915 | on the RT/PC. */ | |
2916 | DEFUN ("file-writable-p", Ffile_writable_p, Sfile_writable_p, 1, 1, 0, | |
2917 | "Return t if file FILENAME can be written or created by you.") | |
2918 | (filename) | |
2919 | Lisp_Object filename; | |
2920 | { | |
b1d1b865 | 2921 | Lisp_Object absname, dir, encoded; |
f793dc6c RS |
2922 | Lisp_Object handler; |
2923 | struct stat statbuf; | |
2924 | ||
2925 | CHECK_STRING (filename, 0); | |
199607e4 | 2926 | absname = Fexpand_file_name (filename, Qnil); |
f793dc6c RS |
2927 | |
2928 | /* If the file name has special constructs in it, | |
2929 | call the corresponding file handler. */ | |
199607e4 | 2930 | handler = Ffind_file_name_handler (absname, Qfile_writable_p); |
f793dc6c | 2931 | if (!NILP (handler)) |
199607e4 | 2932 | return call2 (handler, Qfile_writable_p, absname); |
f793dc6c | 2933 | |
b1d1b865 RS |
2934 | encoded = ENCODE_FILE (absname); |
2935 | if (stat (XSTRING (encoded)->data, &statbuf) >= 0) | |
2936 | return (check_writable (XSTRING (encoded)->data) | |
f793dc6c | 2937 | ? Qt : Qnil); |
b1d1b865 | 2938 | |
199607e4 | 2939 | dir = Ffile_name_directory (absname); |
f793dc6c RS |
2940 | #ifdef VMS |
2941 | if (!NILP (dir)) | |
2942 | dir = Fdirectory_file_name (dir); | |
2943 | #endif /* VMS */ | |
2944 | #ifdef MSDOS | |
2945 | if (!NILP (dir)) | |
2946 | dir = Fdirectory_file_name (dir); | |
2947 | #endif /* MSDOS */ | |
b1d1b865 RS |
2948 | |
2949 | dir = ENCODE_FILE (dir); | |
f793dc6c RS |
2950 | return (check_writable (!NILP (dir) ? (char *) XSTRING (dir)->data : "") |
2951 | ? Qt : Qnil); | |
2952 | } | |
2953 | \f | |
1f8653eb RS |
2954 | DEFUN ("access-file", Faccess_file, Saccess_file, 2, 2, 0, |
2955 | "Access file FILENAME, and get an error if that does not work.\n\ | |
2956 | The second argument STRING is used in the error message.\n\ | |
2957 | If there is no error, we return nil.") | |
2958 | (filename, string) | |
2959 | Lisp_Object filename, string; | |
2960 | { | |
b1d1b865 | 2961 | Lisp_Object handler, encoded_filename; |
1f8653eb RS |
2962 | int fd; |
2963 | ||
2964 | CHECK_STRING (filename, 0); | |
a79485af | 2965 | CHECK_STRING (string, 1); |
1f8653eb RS |
2966 | |
2967 | /* If the file name has special constructs in it, | |
2968 | call the corresponding file handler. */ | |
2969 | handler = Ffind_file_name_handler (filename, Qaccess_file); | |
2970 | if (!NILP (handler)) | |
2971 | return call3 (handler, Qaccess_file, filename, string); | |
2972 | ||
b1d1b865 RS |
2973 | encoded_filename = ENCODE_FILE (filename); |
2974 | ||
68c45bf0 | 2975 | fd = emacs_open (XSTRING (encoded_filename)->data, O_RDONLY, 0); |
1f8653eb RS |
2976 | if (fd < 0) |
2977 | report_file_error (XSTRING (string)->data, Fcons (filename, Qnil)); | |
68c45bf0 | 2978 | emacs_close (fd); |
1f8653eb RS |
2979 | |
2980 | return Qnil; | |
2981 | } | |
2982 | \f | |
570d7624 | 2983 | DEFUN ("file-symlink-p", Ffile_symlink_p, Sfile_symlink_p, 1, 1, 0, |
89de89c7 RS |
2984 | "Return non-nil if file FILENAME is the name of a symbolic link.\n\ |
2985 | The value is the name of the file to which it is linked.\n\ | |
2986 | Otherwise returns nil.") | |
570d7624 JB |
2987 | (filename) |
2988 | Lisp_Object filename; | |
2989 | { | |
2990 | #ifdef S_IFLNK | |
2991 | char *buf; | |
2992 | int bufsize; | |
2993 | int valsize; | |
2994 | Lisp_Object val; | |
32f4334d | 2995 | Lisp_Object handler; |
570d7624 JB |
2996 | |
2997 | CHECK_STRING (filename, 0); | |
2998 | filename = Fexpand_file_name (filename, Qnil); | |
2999 | ||
32f4334d RS |
3000 | /* If the file name has special constructs in it, |
3001 | call the corresponding file handler. */ | |
49307295 | 3002 | handler = Ffind_file_name_handler (filename, Qfile_symlink_p); |
32f4334d RS |
3003 | if (!NILP (handler)) |
3004 | return call2 (handler, Qfile_symlink_p, filename); | |
3005 | ||
b1d1b865 RS |
3006 | filename = ENCODE_FILE (filename); |
3007 | ||
570d7624 JB |
3008 | bufsize = 100; |
3009 | while (1) | |
3010 | { | |
3011 | buf = (char *) xmalloc (bufsize); | |
3012 | bzero (buf, bufsize); | |
3013 | valsize = readlink (XSTRING (filename)->data, buf, bufsize); | |
3014 | if (valsize < bufsize) break; | |
3015 | /* Buffer was not long enough */ | |
9ac0d9e0 | 3016 | xfree (buf); |
570d7624 JB |
3017 | bufsize *= 2; |
3018 | } | |
3019 | if (valsize == -1) | |
3020 | { | |
9ac0d9e0 | 3021 | xfree (buf); |
570d7624 JB |
3022 | return Qnil; |
3023 | } | |
3024 | val = make_string (buf, valsize); | |
69ac1891 GM |
3025 | if (buf[0] == '/' && index (buf, ':')) |
3026 | val = concat2 (build_string ("/:"), val); | |
9ac0d9e0 | 3027 | xfree (buf); |
cd913586 KH |
3028 | val = DECODE_FILE (val); |
3029 | return val; | |
570d7624 JB |
3030 | #else /* not S_IFLNK */ |
3031 | return Qnil; | |
3032 | #endif /* not S_IFLNK */ | |
3033 | } | |
3034 | ||
570d7624 | 3035 | DEFUN ("file-directory-p", Ffile_directory_p, Sfile_directory_p, 1, 1, 0, |
3be6c6a0 DL |
3036 | "Return t if FILENAME names an existing directory.\n\ |
3037 | Symbolic links to directories count as directories.\n\ | |
3038 | See `file-symlink-p' to distinguish symlinks.") | |
570d7624 JB |
3039 | (filename) |
3040 | Lisp_Object filename; | |
3041 | { | |
199607e4 | 3042 | register Lisp_Object absname; |
570d7624 | 3043 | struct stat st; |
32f4334d | 3044 | Lisp_Object handler; |
570d7624 | 3045 | |
199607e4 | 3046 | absname = expand_and_dir_to_file (filename, current_buffer->directory); |
570d7624 | 3047 | |
32f4334d RS |
3048 | /* If the file name has special constructs in it, |
3049 | call the corresponding file handler. */ | |
199607e4 | 3050 | handler = Ffind_file_name_handler (absname, Qfile_directory_p); |
32f4334d | 3051 | if (!NILP (handler)) |
199607e4 | 3052 | return call2 (handler, Qfile_directory_p, absname); |
32f4334d | 3053 | |
b1d1b865 RS |
3054 | absname = ENCODE_FILE (absname); |
3055 | ||
199607e4 | 3056 | if (stat (XSTRING (absname)->data, &st) < 0) |
570d7624 JB |
3057 | return Qnil; |
3058 | return (st.st_mode & S_IFMT) == S_IFDIR ? Qt : Qnil; | |
3059 | } | |
3060 | ||
b72dea2a JB |
3061 | DEFUN ("file-accessible-directory-p", Ffile_accessible_directory_p, Sfile_accessible_directory_p, 1, 1, 0, |
3062 | "Return t if file FILENAME is the name of a directory as a file,\n\ | |
3063 | and files in that directory can be opened by you. In order to use a\n\ | |
3064 | directory as a buffer's current directory, this predicate must return true.\n\ | |
3065 | A directory name spec may be given instead; then the value is t\n\ | |
3066 | if the directory so specified exists and really is a readable and\n\ | |
3067 | searchable directory.") | |
3068 | (filename) | |
3069 | Lisp_Object filename; | |
3070 | { | |
32f4334d | 3071 | Lisp_Object handler; |
1a04498e | 3072 | int tem; |
d26859eb | 3073 | struct gcpro gcpro1; |
32f4334d RS |
3074 | |
3075 | /* If the file name has special constructs in it, | |
3076 | call the corresponding file handler. */ | |
49307295 | 3077 | handler = Ffind_file_name_handler (filename, Qfile_accessible_directory_p); |
32f4334d RS |
3078 | if (!NILP (handler)) |
3079 | return call2 (handler, Qfile_accessible_directory_p, filename); | |
3080 | ||
d26859eb KH |
3081 | /* It's an unlikely combination, but yes we really do need to gcpro: |
3082 | Suppose that file-accessible-directory-p has no handler, but | |
3083 | file-directory-p does have a handler; this handler causes a GC which | |
3084 | relocates the string in `filename'; and finally file-directory-p | |
3085 | returns non-nil. Then we would end up passing a garbaged string | |
3086 | to file-executable-p. */ | |
3087 | GCPRO1 (filename); | |
1a04498e KH |
3088 | tem = (NILP (Ffile_directory_p (filename)) |
3089 | || NILP (Ffile_executable_p (filename))); | |
d26859eb | 3090 | UNGCPRO; |
1a04498e | 3091 | return tem ? Qnil : Qt; |
b72dea2a JB |
3092 | } |
3093 | ||
f793dc6c RS |
3094 | DEFUN ("file-regular-p", Ffile_regular_p, Sfile_regular_p, 1, 1, 0, |
3095 | "Return t if file FILENAME is the name of a regular file.\n\ | |
3096 | This is the sort of file that holds an ordinary stream of data bytes.") | |
3097 | (filename) | |
3098 | Lisp_Object filename; | |
3099 | { | |
199607e4 | 3100 | register Lisp_Object absname; |
f793dc6c RS |
3101 | struct stat st; |
3102 | Lisp_Object handler; | |
3103 | ||
199607e4 | 3104 | absname = expand_and_dir_to_file (filename, current_buffer->directory); |
f793dc6c RS |
3105 | |
3106 | /* If the file name has special constructs in it, | |
3107 | call the corresponding file handler. */ | |
199607e4 | 3108 | handler = Ffind_file_name_handler (absname, Qfile_regular_p); |
f793dc6c | 3109 | if (!NILP (handler)) |
199607e4 | 3110 | return call2 (handler, Qfile_regular_p, absname); |
f793dc6c | 3111 | |
b1d1b865 RS |
3112 | absname = ENCODE_FILE (absname); |
3113 | ||
c1c4693e RS |
3114 | #ifdef WINDOWSNT |
3115 | { | |
3116 | int result; | |
3117 | Lisp_Object tem = Vw32_get_true_file_attributes; | |
3118 | ||
3119 | /* Tell stat to use expensive method to get accurate info. */ | |
3120 | Vw32_get_true_file_attributes = Qt; | |
3121 | result = stat (XSTRING (absname)->data, &st); | |
3122 | Vw32_get_true_file_attributes = tem; | |
3123 | ||
3124 | if (result < 0) | |
3125 | return Qnil; | |
3126 | return (st.st_mode & S_IFMT) == S_IFREG ? Qt : Qnil; | |
3127 | } | |
3128 | #else | |
4cd8344a | 3129 | if (stat (XSTRING (absname)->data, &st) < 0) |
f793dc6c RS |
3130 | return Qnil; |
3131 | return (st.st_mode & S_IFMT) == S_IFREG ? Qt : Qnil; | |
c1c4693e | 3132 | #endif |
f793dc6c RS |
3133 | } |
3134 | \f | |
570d7624 | 3135 | DEFUN ("file-modes", Ffile_modes, Sfile_modes, 1, 1, 0, |
3b7f6e60 | 3136 | "Return mode bits of file named FILENAME, as an integer.") |
570d7624 JB |
3137 | (filename) |
3138 | Lisp_Object filename; | |
3139 | { | |
199607e4 | 3140 | Lisp_Object absname; |
570d7624 | 3141 | struct stat st; |
32f4334d | 3142 | Lisp_Object handler; |
570d7624 | 3143 | |
199607e4 | 3144 | absname = expand_and_dir_to_file (filename, current_buffer->directory); |
570d7624 | 3145 | |
32f4334d RS |
3146 | /* If the file name has special constructs in it, |
3147 | call the corresponding file handler. */ | |
199607e4 | 3148 | handler = Ffind_file_name_handler (absname, Qfile_modes); |
32f4334d | 3149 | if (!NILP (handler)) |
199607e4 | 3150 | return call2 (handler, Qfile_modes, absname); |
32f4334d | 3151 | |
b1d1b865 RS |
3152 | absname = ENCODE_FILE (absname); |
3153 | ||
199607e4 | 3154 | if (stat (XSTRING (absname)->data, &st) < 0) |
570d7624 | 3155 | return Qnil; |
34ead71a | 3156 | #if defined (MSDOS) && __DJGPP__ < 2 |
199607e4 | 3157 | if (check_executable (XSTRING (absname)->data)) |
3be3c08e | 3158 | st.st_mode |= S_IEXEC; |
34ead71a | 3159 | #endif /* MSDOS && __DJGPP__ < 2 */ |
3ace87e3 | 3160 | |
570d7624 JB |
3161 | return make_number (st.st_mode & 07777); |
3162 | } | |
3163 | ||
3164 | DEFUN ("set-file-modes", Fset_file_modes, Sset_file_modes, 2, 2, 0, | |
3b7f6e60 | 3165 | "Set mode bits of file named FILENAME to MODE (an integer).\n\ |
570d7624 JB |
3166 | Only the 12 low bits of MODE are used.") |
3167 | (filename, mode) | |
3168 | Lisp_Object filename, mode; | |
3169 | { | |
b1d1b865 | 3170 | Lisp_Object absname, encoded_absname; |
32f4334d | 3171 | Lisp_Object handler; |
570d7624 | 3172 | |
199607e4 | 3173 | absname = Fexpand_file_name (filename, current_buffer->directory); |
570d7624 JB |
3174 | CHECK_NUMBER (mode, 1); |
3175 | ||
32f4334d RS |
3176 | /* If the file name has special constructs in it, |
3177 | call the corresponding file handler. */ | |
199607e4 | 3178 | handler = Ffind_file_name_handler (absname, Qset_file_modes); |
32f4334d | 3179 | if (!NILP (handler)) |
199607e4 | 3180 | return call3 (handler, Qset_file_modes, absname, mode); |
32f4334d | 3181 | |
b1d1b865 RS |
3182 | encoded_absname = ENCODE_FILE (absname); |
3183 | ||
3184 | if (chmod (XSTRING (encoded_absname)->data, XINT (mode)) < 0) | |
199607e4 | 3185 | report_file_error ("Doing chmod", Fcons (absname, Qnil)); |
570d7624 JB |
3186 | |
3187 | return Qnil; | |
3188 | } | |
3189 | ||
c24e9a53 | 3190 | DEFUN ("set-default-file-modes", Fset_default_file_modes, Sset_default_file_modes, 1, 1, 0, |
5f85ea58 RS |
3191 | "Set the file permission bits for newly created files.\n\ |
3192 | The argument MODE should be an integer; only the low 9 bits are used.\n\ | |
36a8c287 | 3193 | This setting is inherited by subprocesses.") |
5f85ea58 RS |
3194 | (mode) |
3195 | Lisp_Object mode; | |
36a8c287 | 3196 | { |
5f85ea58 | 3197 | CHECK_NUMBER (mode, 0); |
199607e4 | 3198 | |
5f85ea58 | 3199 | umask ((~ XINT (mode)) & 0777); |
36a8c287 JB |
3200 | |
3201 | return Qnil; | |
3202 | } | |
3203 | ||
c24e9a53 | 3204 | DEFUN ("default-file-modes", Fdefault_file_modes, Sdefault_file_modes, 0, 0, 0, |
5f85ea58 RS |
3205 | "Return the default file protection for created files.\n\ |
3206 | The value is an integer.") | |
36a8c287 JB |
3207 | () |
3208 | { | |
5f85ea58 RS |
3209 | int realmask; |
3210 | Lisp_Object value; | |
36a8c287 | 3211 | |
5f85ea58 RS |
3212 | realmask = umask (0); |
3213 | umask (realmask); | |
36a8c287 | 3214 | |
46283abe | 3215 | XSETINT (value, (~ realmask) & 0777); |
5f85ea58 | 3216 | return value; |
36a8c287 | 3217 | } |
5df5e07c | 3218 | |
f793dc6c | 3219 | \f |
5df5e07c GM |
3220 | #ifdef __NetBSD__ |
3221 | #define unix 42 | |
3222 | #endif | |
85ffea93 | 3223 | |
5df5e07c | 3224 | #ifdef unix |
85ffea93 RS |
3225 | DEFUN ("unix-sync", Funix_sync, Sunix_sync, 0, 0, "", |
3226 | "Tell Unix to finish all pending disk updates.") | |
3227 | () | |
3228 | { | |
3229 | sync (); | |
3230 | return Qnil; | |
3231 | } | |
3232 | ||
3233 | #endif /* unix */ | |
3234 | ||
570d7624 JB |
3235 | DEFUN ("file-newer-than-file-p", Ffile_newer_than_file_p, Sfile_newer_than_file_p, 2, 2, 0, |
3236 | "Return t if file FILE1 is newer than file FILE2.\n\ | |
3237 | If FILE1 does not exist, the answer is nil;\n\ | |
3238 | otherwise, if FILE2 does not exist, the answer is t.") | |
3239 | (file1, file2) | |
3240 | Lisp_Object file1, file2; | |
3241 | { | |
199607e4 | 3242 | Lisp_Object absname1, absname2; |
570d7624 JB |
3243 | struct stat st; |
3244 | int mtime1; | |
32f4334d | 3245 | Lisp_Object handler; |
09121adc | 3246 | struct gcpro gcpro1, gcpro2; |
570d7624 JB |
3247 | |
3248 | CHECK_STRING (file1, 0); | |
3249 | CHECK_STRING (file2, 0); | |
3250 | ||
199607e4 RS |
3251 | absname1 = Qnil; |
3252 | GCPRO2 (absname1, file2); | |
3253 | absname1 = expand_and_dir_to_file (file1, current_buffer->directory); | |
3254 | absname2 = expand_and_dir_to_file (file2, current_buffer->directory); | |
09121adc | 3255 | UNGCPRO; |
570d7624 | 3256 | |
32f4334d RS |
3257 | /* If the file name has special constructs in it, |
3258 | call the corresponding file handler. */ | |
199607e4 | 3259 | handler = Ffind_file_name_handler (absname1, Qfile_newer_than_file_p); |
51cf6d37 | 3260 | if (NILP (handler)) |
199607e4 | 3261 | handler = Ffind_file_name_handler (absname2, Qfile_newer_than_file_p); |
32f4334d | 3262 | if (!NILP (handler)) |
199607e4 | 3263 | return call3 (handler, Qfile_newer_than_file_p, absname1, absname2); |
32f4334d | 3264 | |
b1d1b865 RS |
3265 | GCPRO2 (absname1, absname2); |
3266 | absname1 = ENCODE_FILE (absname1); | |
3267 | absname2 = ENCODE_FILE (absname2); | |
3268 | UNGCPRO; | |
3269 | ||
199607e4 | 3270 | if (stat (XSTRING (absname1)->data, &st) < 0) |
570d7624 JB |
3271 | return Qnil; |
3272 | ||
3273 | mtime1 = st.st_mtime; | |
3274 | ||
199607e4 | 3275 | if (stat (XSTRING (absname2)->data, &st) < 0) |
570d7624 JB |
3276 | return Qt; |
3277 | ||
3278 | return (mtime1 > st.st_mtime) ? Qt : Qnil; | |
3279 | } | |
3280 | \f | |
5e570b75 | 3281 | #ifdef DOS_NT |
4c3c22f3 | 3282 | Lisp_Object Qfind_buffer_file_type; |
5e570b75 | 3283 | #endif /* DOS_NT */ |
4c3c22f3 | 3284 | |
6fdaa9a0 KH |
3285 | #ifndef READ_BUF_SIZE |
3286 | #define READ_BUF_SIZE (64 << 10) | |
3287 | #endif | |
3288 | ||
98a7d268 KH |
3289 | extern void adjust_markers_for_delete P_ ((int, int, int, int)); |
3290 | ||
3291 | /* This function is called after Lisp functions to decide a coding | |
3292 | system are called, or when they cause an error. Before they are | |
3293 | called, the current buffer is set unibyte and it contains only a | |
3294 | newly inserted text (thus the buffer was empty before the | |
3295 | insertion). | |
3296 | ||
3297 | The functions may set markers, overlays, text properties, or even | |
3298 | alter the buffer contents, change the current buffer. | |
3299 | ||
3300 | Here, we reset all those changes by: | |
3301 | o set back the current buffer. | |
3302 | o move all markers and overlays to BEG. | |
3303 | o remove all text properties. | |
3304 | o set back the buffer multibyteness. */ | |
f736ffbf KH |
3305 | |
3306 | static Lisp_Object | |
98a7d268 KH |
3307 | decide_coding_unwind (unwind_data) |
3308 | Lisp_Object unwind_data; | |
f736ffbf | 3309 | { |
98a7d268 | 3310 | Lisp_Object multibyte, undo_list, buffer; |
f736ffbf | 3311 | |
98a7d268 KH |
3312 | multibyte = XCAR (unwind_data); |
3313 | unwind_data = XCDR (unwind_data); | |
3314 | undo_list = XCAR (unwind_data); | |
3315 | buffer = XCDR (unwind_data); | |
3316 | ||
3317 | if (current_buffer != XBUFFER (buffer)) | |
3318 | set_buffer_internal (XBUFFER (buffer)); | |
3319 | adjust_markers_for_delete (BEG, BEG_BYTE, Z, Z_BYTE); | |
3320 | adjust_overlays_for_delete (BEG, Z - BEG); | |
3321 | BUF_INTERVALS (current_buffer) = 0; | |
3322 | TEMP_SET_PT_BOTH (BEG, BEG_BYTE); | |
3323 | ||
3324 | /* Now we are safe to change the buffer's multibyteness directly. */ | |
3325 | current_buffer->enable_multibyte_characters = multibyte; | |
3326 | current_buffer->undo_list = undo_list; | |
f736ffbf KH |
3327 | |
3328 | return Qnil; | |
3329 | } | |
3330 | ||
570d7624 | 3331 | DEFUN ("insert-file-contents", Finsert_file_contents, Sinsert_file_contents, |
3d0387c0 | 3332 | 1, 5, 0, |
570d7624 | 3333 | "Insert contents of file FILENAME after point.\n\ |
ec7adf26 | 3334 | Returns list of absolute file name and number of bytes inserted.\n\ |
570d7624 JB |
3335 | If second argument VISIT is non-nil, the buffer's visited filename\n\ |
3336 | and last save file modtime are set, and it is marked unmodified.\n\ | |
3337 | If visiting and the file does not exist, visiting is completed\n\ | |
6fdaa9a0 | 3338 | before the error is signaled.\n\ |
7fded690 JB |
3339 | The optional third and fourth arguments BEG and END\n\ |
3340 | specify what portion of the file to insert.\n\ | |
ec7adf26 | 3341 | These arguments count bytes in the file, not characters in the buffer.\n\ |
3d0387c0 | 3342 | If VISIT is non-nil, BEG and END must be nil.\n\ |
94bec52a | 3343 | \n\ |
3d0387c0 RS |
3344 | If optional fifth argument REPLACE is non-nil,\n\ |
3345 | it means replace the current buffer contents (in the accessible portion)\n\ | |
3346 | with the file contents. This is better than simply deleting and inserting\n\ | |
3347 | the whole thing because (1) it preserves some marker positions\n\ | |
94bec52a RS |
3348 | and (2) it puts less data in the undo list.\n\ |
3349 | When REPLACE is non-nil, the value is the number of characters actually read,\n\ | |
6fdaa9a0 | 3350 | which is often less than the number of characters to be read.\n\ |
6cf71bf1 | 3351 | \n\ |
6fdaa9a0 | 3352 | This does code conversion according to the value of\n\ |
6cf71bf1 KH |
3353 | `coding-system-for-read' or `file-coding-system-alist',\n\ |
3354 | and sets the variable `last-coding-system-used' to the coding system\n\ | |
3355 | actually used.") | |
3d0387c0 RS |
3356 | (filename, visit, beg, end, replace) |
3357 | Lisp_Object filename, visit, beg, end, replace; | |
570d7624 JB |
3358 | { |
3359 | struct stat st; | |
3360 | register int fd; | |
ec7adf26 | 3361 | int inserted = 0; |
570d7624 | 3362 | register int how_much; |
6fdaa9a0 | 3363 | register int unprocessed; |
570d7624 | 3364 | int count = specpdl_ptr - specpdl; |
b1d1b865 RS |
3365 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; |
3366 | Lisp_Object handler, val, insval, orig_filename; | |
d6a3cc15 | 3367 | Lisp_Object p; |
7fded690 | 3368 | int total; |
53c34c46 | 3369 | int not_regular = 0; |
feb9dc27 | 3370 | unsigned char read_buf[READ_BUF_SIZE]; |
6fdaa9a0 | 3371 | struct coding_system coding; |
3dbcf3f6 | 3372 | unsigned char buffer[1 << 14]; |
727a0b4a | 3373 | int replace_handled = 0; |
ec7adf26 | 3374 | int set_coding_system = 0; |
f736ffbf | 3375 | int coding_system_decided = 0; |
32f4334d | 3376 | |
95385625 RS |
3377 | if (current_buffer->base_buffer && ! NILP (visit)) |
3378 | error ("Cannot do file visiting in an indirect buffer"); | |
3379 | ||
3380 | if (!NILP (current_buffer->read_only)) | |
3381 | Fbarf_if_buffer_read_only (); | |
3382 | ||
32f4334d | 3383 | val = Qnil; |
d6a3cc15 | 3384 | p = Qnil; |
b1d1b865 | 3385 | orig_filename = Qnil; |
32f4334d | 3386 | |
b1d1b865 | 3387 | GCPRO4 (filename, val, p, orig_filename); |
570d7624 JB |
3388 | |
3389 | CHECK_STRING (filename, 0); | |
3390 | filename = Fexpand_file_name (filename, Qnil); | |
3391 | ||
32f4334d RS |
3392 | /* If the file name has special constructs in it, |
3393 | call the corresponding file handler. */ | |
49307295 | 3394 | handler = Ffind_file_name_handler (filename, Qinsert_file_contents); |
32f4334d RS |
3395 | if (!NILP (handler)) |
3396 | { | |
3d0387c0 RS |
3397 | val = call6 (handler, Qinsert_file_contents, filename, |
3398 | visit, beg, end, replace); | |
03699b14 KR |
3399 | if (CONSP (val) && CONSP (XCDR (val))) |
3400 | inserted = XINT (XCAR (XCDR (val))); | |
32f4334d RS |
3401 | goto handled; |
3402 | } | |
3403 | ||
b1d1b865 RS |
3404 | orig_filename = filename; |
3405 | filename = ENCODE_FILE (filename); | |
3406 | ||
570d7624 JB |
3407 | fd = -1; |
3408 | ||
c1c4693e RS |
3409 | #ifdef WINDOWSNT |
3410 | { | |
3411 | Lisp_Object tem = Vw32_get_true_file_attributes; | |
3412 | ||
3413 | /* Tell stat to use expensive method to get accurate info. */ | |
3414 | Vw32_get_true_file_attributes = Qt; | |
3415 | total = stat (XSTRING (filename)->data, &st); | |
3416 | Vw32_get_true_file_attributes = tem; | |
3417 | } | |
3418 | if (total < 0) | |
3419 | #else | |
570d7624 | 3420 | #ifndef APOLLO |
99bc28f4 | 3421 | if (stat (XSTRING (filename)->data, &st) < 0) |
570d7624 | 3422 | #else |
68c45bf0 | 3423 | if ((fd = emacs_open (XSTRING (filename)->data, O_RDONLY, 0)) < 0 |
570d7624 JB |
3424 | || fstat (fd, &st) < 0) |
3425 | #endif /* not APOLLO */ | |
c1c4693e | 3426 | #endif /* WINDOWSNT */ |
570d7624 | 3427 | { |
68c45bf0 | 3428 | if (fd >= 0) emacs_close (fd); |
99bc28f4 | 3429 | badopen: |
265a9e55 | 3430 | if (NILP (visit)) |
b1d1b865 | 3431 | report_file_error ("Opening input file", Fcons (orig_filename, Qnil)); |
570d7624 JB |
3432 | st.st_mtime = -1; |
3433 | how_much = 0; | |
0de6b8f4 | 3434 | if (!NILP (Vcoding_system_for_read)) |
22d92d6b | 3435 | Fset (Qbuffer_file_coding_system, Vcoding_system_for_read); |
570d7624 JB |
3436 | goto notfound; |
3437 | } | |
3438 | ||
99bc28f4 | 3439 | #ifdef S_IFREG |
be53b411 JB |
3440 | /* This code will need to be changed in order to work on named |
3441 | pipes, and it's probably just not worth it. So we should at | |
3442 | least signal an error. */ | |
99bc28f4 | 3443 | if (!S_ISREG (st.st_mode)) |
330bfe57 | 3444 | { |
d4b8687b RS |
3445 | not_regular = 1; |
3446 | ||
3447 | if (! NILP (visit)) | |
3448 | goto notfound; | |
3449 | ||
3450 | if (! NILP (replace) || ! NILP (beg) || ! NILP (end)) | |
330bfe57 RS |
3451 | Fsignal (Qfile_error, |
3452 | Fcons (build_string ("not a regular file"), | |
b1d1b865 | 3453 | Fcons (orig_filename, Qnil))); |
330bfe57 | 3454 | } |
be53b411 JB |
3455 | #endif |
3456 | ||
99bc28f4 | 3457 | if (fd < 0) |
68c45bf0 | 3458 | if ((fd = emacs_open (XSTRING (filename)->data, O_RDONLY, 0)) < 0) |
99bc28f4 KH |
3459 | goto badopen; |
3460 | ||
3461 | /* Replacement should preserve point as it preserves markers. */ | |
3462 | if (!NILP (replace)) | |
3463 | record_unwind_protect (restore_point_unwind, Fpoint_marker ()); | |
3464 | ||
3465 | record_unwind_protect (close_file_unwind, make_number (fd)); | |
3466 | ||
570d7624 | 3467 | /* Supposedly happens on VMS. */ |
d4b8687b | 3468 | if (! not_regular && st.st_size < 0) |
570d7624 | 3469 | error ("File size is negative"); |
be53b411 | 3470 | |
9c856db9 GM |
3471 | /* Prevent redisplay optimizations. */ |
3472 | current_buffer->clip_changed = 1; | |
3473 | ||
9f57b6b4 KH |
3474 | if (!NILP (visit)) |
3475 | { | |
3476 | if (!NILP (beg) || !NILP (end)) | |
3477 | error ("Attempt to visit less than an entire file"); | |
3478 | if (BEG < Z && NILP (replace)) | |
3479 | error ("Cannot do file visiting in a non-empty buffer"); | |
3480 | } | |
7fded690 JB |
3481 | |
3482 | if (!NILP (beg)) | |
3483 | CHECK_NUMBER (beg, 0); | |
3484 | else | |
2acfd7ae | 3485 | XSETFASTINT (beg, 0); |
7fded690 JB |
3486 | |
3487 | if (!NILP (end)) | |
3488 | CHECK_NUMBER (end, 0); | |
3489 | else | |
3490 | { | |
d4b8687b RS |
3491 | if (! not_regular) |
3492 | { | |
3493 | XSETINT (end, st.st_size); | |
68c45bf0 PE |
3494 | |
3495 | /* Arithmetic overflow can occur if an Emacs integer cannot | |
3496 | represent the file size, or if the calculations below | |
3497 | overflow. The calculations below double the file size | |
3498 | twice, so check that it can be multiplied by 4 safely. */ | |
3499 | if (XINT (end) != st.st_size | |
3500 | || ((int) st.st_size * 4) / 4 != st.st_size) | |
d4b8687b RS |
3501 | error ("Maximum buffer size exceeded"); |
3502 | } | |
7fded690 JB |
3503 | } |
3504 | ||
f736ffbf KH |
3505 | if (BEG < Z) |
3506 | { | |
3507 | /* Decide the coding system to use for reading the file now | |
3508 | because we can't use an optimized method for handling | |
3509 | `coding:' tag if the current buffer is not empty. */ | |
3510 | Lisp_Object val; | |
3511 | val = Qnil; | |
feb9dc27 | 3512 | |
f736ffbf KH |
3513 | if (!NILP (Vcoding_system_for_read)) |
3514 | val = Vcoding_system_for_read; | |
3515 | else if (! NILP (replace)) | |
3516 | /* In REPLACE mode, we can use the same coding system | |
3517 | that was used to visit the file. */ | |
3518 | val = current_buffer->buffer_file_coding_system; | |
3519 | else | |
3520 | { | |
3521 | /* Don't try looking inside a file for a coding system | |
3522 | specification if it is not seekable. */ | |
3523 | if (! not_regular && ! NILP (Vset_auto_coding_function)) | |
3524 | { | |
3525 | /* Find a coding system specified in the heading two | |
3526 | lines or in the tailing several lines of the file. | |
3527 | We assume that the 1K-byte and 3K-byte for heading | |
003a7eaa | 3528 | and tailing respectively are sufficient for this |
f736ffbf | 3529 | purpose. */ |
07590973 | 3530 | int nread; |
f736ffbf KH |
3531 | |
3532 | if (st.st_size <= (1024 * 4)) | |
68c45bf0 | 3533 | nread = emacs_read (fd, read_buf, 1024 * 4); |
f736ffbf KH |
3534 | else |
3535 | { | |
68c45bf0 | 3536 | nread = emacs_read (fd, read_buf, 1024); |
f736ffbf KH |
3537 | if (nread >= 0) |
3538 | { | |
3539 | if (lseek (fd, st.st_size - (1024 * 3), 0) < 0) | |
3540 | report_file_error ("Setting file position", | |
3541 | Fcons (orig_filename, Qnil)); | |
68c45bf0 | 3542 | nread += emacs_read (fd, read_buf + nread, 1024 * 3); |
f736ffbf KH |
3543 | } |
3544 | } | |
feb9dc27 | 3545 | |
f736ffbf KH |
3546 | if (nread < 0) |
3547 | error ("IO error reading %s: %s", | |
68c45bf0 | 3548 | XSTRING (orig_filename)->data, emacs_strerror (errno)); |
f736ffbf KH |
3549 | else if (nread > 0) |
3550 | { | |
f736ffbf | 3551 | struct buffer *prev = current_buffer; |
1d92afcd | 3552 | int count1; |
f736ffbf KH |
3553 | |
3554 | record_unwind_protect (Fset_buffer, Fcurrent_buffer ()); | |
1d92afcd GM |
3555 | |
3556 | /* The call to temp_output_buffer_setup binds | |
3557 | standard-output. */ | |
3558 | count1 = specpdl_ptr - specpdl; | |
f736ffbf | 3559 | temp_output_buffer_setup (" *code-converting-work*"); |
1d92afcd | 3560 | |
f736ffbf KH |
3561 | set_buffer_internal (XBUFFER (Vstandard_output)); |
3562 | current_buffer->enable_multibyte_characters = Qnil; | |
3563 | insert_1_both (read_buf, nread, nread, 0, 0, 0); | |
3564 | TEMP_SET_PT_BOTH (BEG, BEG_BYTE); | |
1255deb9 KH |
3565 | val = call2 (Vset_auto_coding_function, |
3566 | filename, make_number (nread)); | |
f736ffbf | 3567 | set_buffer_internal (prev); |
1d92afcd GM |
3568 | |
3569 | /* Remove the binding for standard-output. */ | |
3570 | unbind_to (count1, Qnil); | |
3571 | ||
f736ffbf KH |
3572 | /* Discard the unwind protect for recovering the |
3573 | current buffer. */ | |
3574 | specpdl_ptr--; | |
3575 | ||
3576 | /* Rewind the file for the actual read done later. */ | |
3577 | if (lseek (fd, 0, 0) < 0) | |
3578 | report_file_error ("Setting file position", | |
3579 | Fcons (orig_filename, Qnil)); | |
3580 | } | |
3581 | } | |
feb9dc27 | 3582 | |
f736ffbf KH |
3583 | if (NILP (val)) |
3584 | { | |
3585 | /* If we have not yet decided a coding system, check | |
3586 | file-coding-system-alist. */ | |
3587 | Lisp_Object args[6], coding_systems; | |
3588 | ||
3589 | args[0] = Qinsert_file_contents, args[1] = orig_filename; | |
3590 | args[2] = visit, args[3] = beg, args[4] = end, args[5] = replace; | |
3591 | coding_systems = Ffind_operation_coding_system (6, args); | |
3592 | if (CONSP (coding_systems)) | |
03699b14 | 3593 | val = XCAR (coding_systems); |
f736ffbf KH |
3594 | } |
3595 | } | |
c9e82392 | 3596 | |
f736ffbf | 3597 | setup_coding_system (Fcheck_coding_system (val), &coding); |
c8a6d68a | 3598 | |
237a6fd2 RS |
3599 | if (NILP (current_buffer->enable_multibyte_characters) |
3600 | && ! NILP (val)) | |
3601 | /* We must suppress all character code conversion except for | |
3602 | end-of-line conversion. */ | |
57515cfe | 3603 | setup_raw_text_coding_system (&coding); |
54369368 | 3604 | |
f736ffbf KH |
3605 | coding_system_decided = 1; |
3606 | } | |
6cf71bf1 | 3607 | |
f736ffbf KH |
3608 | /* Ensure we always set Vlast_coding_system_used. */ |
3609 | set_coding_system = 1; | |
c9e82392 | 3610 | |
3d0387c0 RS |
3611 | /* If requested, replace the accessible part of the buffer |
3612 | with the file contents. Avoid replacing text at the | |
3613 | beginning or end of the buffer that matches the file contents; | |
3dbcf3f6 RS |
3614 | that preserves markers pointing to the unchanged parts. |
3615 | ||
3616 | Here we implement this feature in an optimized way | |
3617 | for the case where code conversion is NOT needed. | |
3618 | The following if-statement handles the case of conversion | |
727a0b4a RS |
3619 | in a less optimal way. |
3620 | ||
3621 | If the code conversion is "automatic" then we try using this | |
3622 | method and hope for the best. | |
3623 | But if we discover the need for conversion, we give up on this method | |
3624 | and let the following if-statement handle the replace job. */ | |
3dbcf3f6 | 3625 | if (!NILP (replace) |
f736ffbf | 3626 | && BEGV < ZV |
70697733 RS |
3627 | && ! CODING_REQUIRE_DECODING (&coding) |
3628 | && (coding.eol_type == CODING_EOL_UNDECIDED | |
3629 | || coding.eol_type == CODING_EOL_LF)) | |
3d0387c0 | 3630 | { |
ec7adf26 RS |
3631 | /* same_at_start and same_at_end count bytes, |
3632 | because file access counts bytes | |
3633 | and BEG and END count bytes. */ | |
3634 | int same_at_start = BEGV_BYTE; | |
3635 | int same_at_end = ZV_BYTE; | |
9c28748f | 3636 | int overlap; |
6fdaa9a0 KH |
3637 | /* There is still a possibility we will find the need to do code |
3638 | conversion. If that happens, we set this variable to 1 to | |
727a0b4a | 3639 | give up on handling REPLACE in the optimized way. */ |
6fdaa9a0 | 3640 | int giveup_match_end = 0; |
9c28748f | 3641 | |
4d2a0879 RS |
3642 | if (XINT (beg) != 0) |
3643 | { | |
3644 | if (lseek (fd, XINT (beg), 0) < 0) | |
3645 | report_file_error ("Setting file position", | |
b1d1b865 | 3646 | Fcons (orig_filename, Qnil)); |
4d2a0879 RS |
3647 | } |
3648 | ||
3d0387c0 RS |
3649 | immediate_quit = 1; |
3650 | QUIT; | |
3651 | /* Count how many chars at the start of the file | |
3652 | match the text at the beginning of the buffer. */ | |
3653 | while (1) | |
3654 | { | |
3655 | int nread, bufpos; | |
3656 | ||
68c45bf0 | 3657 | nread = emacs_read (fd, buffer, sizeof buffer); |
3d0387c0 RS |
3658 | if (nread < 0) |
3659 | error ("IO error reading %s: %s", | |
68c45bf0 | 3660 | XSTRING (orig_filename)->data, emacs_strerror (errno)); |
3d0387c0 RS |
3661 | else if (nread == 0) |
3662 | break; | |
6fdaa9a0 | 3663 | |
0ef69138 | 3664 | if (coding.type == coding_type_undecided) |
727a0b4a | 3665 | detect_coding (&coding, buffer, nread); |
6ad0beeb | 3666 | if (CODING_REQUIRE_DECODING (&coding)) |
727a0b4a RS |
3667 | /* We found that the file should be decoded somehow. |
3668 | Let's give up here. */ | |
3669 | { | |
3670 | giveup_match_end = 1; | |
3671 | break; | |
3672 | } | |
3673 | ||
0ef69138 | 3674 | if (coding.eol_type == CODING_EOL_UNDECIDED) |
727a0b4a | 3675 | detect_eol (&coding, buffer, nread); |
1b335d29 | 3676 | if (coding.eol_type != CODING_EOL_UNDECIDED |
70ec4328 | 3677 | && coding.eol_type != CODING_EOL_LF) |
727a0b4a RS |
3678 | /* We found that the format of eol should be decoded. |
3679 | Let's give up here. */ | |
3680 | { | |
3681 | giveup_match_end = 1; | |
3682 | break; | |
3683 | } | |
3684 | ||
3d0387c0 | 3685 | bufpos = 0; |
ec7adf26 | 3686 | while (bufpos < nread && same_at_start < ZV_BYTE |
6fdaa9a0 | 3687 | && FETCH_BYTE (same_at_start) == buffer[bufpos]) |
3d0387c0 RS |
3688 | same_at_start++, bufpos++; |
3689 | /* If we found a discrepancy, stop the scan. | |
8e6208c5 | 3690 | Otherwise loop around and scan the next bufferful. */ |
3d0387c0 RS |
3691 | if (bufpos != nread) |
3692 | break; | |
3693 | } | |
3694 | immediate_quit = 0; | |
3695 | /* If the file matches the buffer completely, | |
3696 | there's no need to replace anything. */ | |
ec7adf26 | 3697 | if (same_at_start - BEGV_BYTE == XINT (end)) |
3d0387c0 | 3698 | { |
68c45bf0 | 3699 | emacs_close (fd); |
a1d2b64a | 3700 | specpdl_ptr--; |
1051b3b3 | 3701 | /* Truncate the buffer to the size of the file. */ |
7dae4502 | 3702 | del_range_1 (same_at_start, same_at_end, 0, 0); |
3d0387c0 RS |
3703 | goto handled; |
3704 | } | |
3705 | immediate_quit = 1; | |
3706 | QUIT; | |
3707 | /* Count how many chars at the end of the file | |
6fdaa9a0 KH |
3708 | match the text at the end of the buffer. But, if we have |
3709 | already found that decoding is necessary, don't waste time. */ | |
3710 | while (!giveup_match_end) | |
3d0387c0 RS |
3711 | { |
3712 | int total_read, nread, bufpos, curpos, trial; | |
3713 | ||
3714 | /* At what file position are we now scanning? */ | |
ec7adf26 | 3715 | curpos = XINT (end) - (ZV_BYTE - same_at_end); |
fc81fa9e KH |
3716 | /* If the entire file matches the buffer tail, stop the scan. */ |
3717 | if (curpos == 0) | |
3718 | break; | |
3d0387c0 RS |
3719 | /* How much can we scan in the next step? */ |
3720 | trial = min (curpos, sizeof buffer); | |
3721 | if (lseek (fd, curpos - trial, 0) < 0) | |
3722 | report_file_error ("Setting file position", | |
b1d1b865 | 3723 | Fcons (orig_filename, Qnil)); |
3d0387c0 RS |
3724 | |
3725 | total_read = 0; | |
3726 | while (total_read < trial) | |
3727 | { | |
68c45bf0 | 3728 | nread = emacs_read (fd, buffer + total_read, trial - total_read); |
3d0387c0 RS |
3729 | if (nread <= 0) |
3730 | error ("IO error reading %s: %s", | |
68c45bf0 | 3731 | XSTRING (orig_filename)->data, emacs_strerror (errno)); |
3d0387c0 RS |
3732 | total_read += nread; |
3733 | } | |
8e6208c5 | 3734 | /* Scan this bufferful from the end, comparing with |
3d0387c0 RS |
3735 | the Emacs buffer. */ |
3736 | bufpos = total_read; | |
3737 | /* Compare with same_at_start to avoid counting some buffer text | |
3738 | as matching both at the file's beginning and at the end. */ | |
3739 | while (bufpos > 0 && same_at_end > same_at_start | |
6fdaa9a0 | 3740 | && FETCH_BYTE (same_at_end - 1) == buffer[bufpos - 1]) |
3d0387c0 | 3741 | same_at_end--, bufpos--; |
727a0b4a | 3742 | |
3d0387c0 | 3743 | /* If we found a discrepancy, stop the scan. |
8e6208c5 | 3744 | Otherwise loop around and scan the preceding bufferful. */ |
3d0387c0 | 3745 | if (bufpos != 0) |
727a0b4a RS |
3746 | { |
3747 | /* If this discrepancy is because of code conversion, | |
3748 | we cannot use this method; giveup and try the other. */ | |
3749 | if (same_at_end > same_at_start | |
3750 | && FETCH_BYTE (same_at_end - 1) >= 0200 | |
71312b68 | 3751 | && ! NILP (current_buffer->enable_multibyte_characters) |
c8a6d68a | 3752 | && (CODING_MAY_REQUIRE_DECODING (&coding))) |
727a0b4a RS |
3753 | giveup_match_end = 1; |
3754 | break; | |
3755 | } | |
3d0387c0 RS |
3756 | } |
3757 | immediate_quit = 0; | |
9c28748f | 3758 | |
727a0b4a RS |
3759 | if (! giveup_match_end) |
3760 | { | |
ec7adf26 RS |
3761 | int temp; |
3762 | ||
727a0b4a | 3763 | /* We win! We can handle REPLACE the optimized way. */ |
9c28748f | 3764 | |
20f6783d RS |
3765 | /* Extend the start of non-matching text area to multibyte |
3766 | character boundary. */ | |
3767 | if (! NILP (current_buffer->enable_multibyte_characters)) | |
3768 | while (same_at_start > BEGV_BYTE | |
3769 | && ! CHAR_HEAD_P (FETCH_BYTE (same_at_start))) | |
3770 | same_at_start--; | |
3771 | ||
3772 | /* Extend the end of non-matching text area to multibyte | |
71312b68 RS |
3773 | character boundary. */ |
3774 | if (! NILP (current_buffer->enable_multibyte_characters)) | |
ec7adf26 RS |
3775 | while (same_at_end < ZV_BYTE |
3776 | && ! CHAR_HEAD_P (FETCH_BYTE (same_at_end))) | |
71312b68 RS |
3777 | same_at_end++; |
3778 | ||
727a0b4a | 3779 | /* Don't try to reuse the same piece of text twice. */ |
ec7adf26 RS |
3780 | overlap = (same_at_start - BEGV_BYTE |
3781 | - (same_at_end + st.st_size - ZV)); | |
727a0b4a RS |
3782 | if (overlap > 0) |
3783 | same_at_end += overlap; | |
9c28748f | 3784 | |
727a0b4a | 3785 | /* Arrange to read only the nonmatching middle part of the file. */ |
ec7adf26 RS |
3786 | XSETFASTINT (beg, XINT (beg) + (same_at_start - BEGV_BYTE)); |
3787 | XSETFASTINT (end, XINT (end) - (ZV_BYTE - same_at_end)); | |
3dbcf3f6 | 3788 | |
ec7adf26 | 3789 | del_range_byte (same_at_start, same_at_end, 0); |
727a0b4a | 3790 | /* Insert from the file at the proper position. */ |
ec7adf26 RS |
3791 | temp = BYTE_TO_CHAR (same_at_start); |
3792 | SET_PT_BOTH (temp, same_at_start); | |
727a0b4a RS |
3793 | |
3794 | /* If display currently starts at beginning of line, | |
3795 | keep it that way. */ | |
3796 | if (XBUFFER (XWINDOW (selected_window)->buffer) == current_buffer) | |
3797 | XWINDOW (selected_window)->start_at_line_beg = Fbolp (); | |
3798 | ||
3799 | replace_handled = 1; | |
3800 | } | |
3dbcf3f6 RS |
3801 | } |
3802 | ||
3803 | /* If requested, replace the accessible part of the buffer | |
3804 | with the file contents. Avoid replacing text at the | |
3805 | beginning or end of the buffer that matches the file contents; | |
3806 | that preserves markers pointing to the unchanged parts. | |
3807 | ||
3808 | Here we implement this feature for the case where code conversion | |
3809 | is needed, in a simple way that needs a lot of memory. | |
3810 | The preceding if-statement handles the case of no conversion | |
3811 | in a more optimized way. */ | |
f736ffbf | 3812 | if (!NILP (replace) && ! replace_handled && BEGV < ZV) |
3dbcf3f6 | 3813 | { |
ec7adf26 RS |
3814 | int same_at_start = BEGV_BYTE; |
3815 | int same_at_end = ZV_BYTE; | |
3dbcf3f6 RS |
3816 | int overlap; |
3817 | int bufpos; | |
3818 | /* Make sure that the gap is large enough. */ | |
3819 | int bufsize = 2 * st.st_size; | |
b00ca0d7 | 3820 | unsigned char *conversion_buffer = (unsigned char *) xmalloc (bufsize); |
ec7adf26 | 3821 | int temp; |
3dbcf3f6 RS |
3822 | |
3823 | /* First read the whole file, performing code conversion into | |
3824 | CONVERSION_BUFFER. */ | |
3825 | ||
727a0b4a RS |
3826 | if (lseek (fd, XINT (beg), 0) < 0) |
3827 | { | |
68cfd853 | 3828 | xfree (conversion_buffer); |
727a0b4a | 3829 | report_file_error ("Setting file position", |
b1d1b865 | 3830 | Fcons (orig_filename, Qnil)); |
727a0b4a RS |
3831 | } |
3832 | ||
3dbcf3f6 RS |
3833 | total = st.st_size; /* Total bytes in the file. */ |
3834 | how_much = 0; /* Bytes read from file so far. */ | |
3835 | inserted = 0; /* Bytes put into CONVERSION_BUFFER so far. */ | |
3836 | unprocessed = 0; /* Bytes not processed in previous loop. */ | |
3837 | ||
3838 | while (how_much < total) | |
3839 | { | |
3840 | /* try is reserved in some compilers (Microsoft C) */ | |
3841 | int trytry = min (total - how_much, READ_BUF_SIZE - unprocessed); | |
cadf50ff | 3842 | unsigned char *destination = read_buf + unprocessed; |
3dbcf3f6 RS |
3843 | int this; |
3844 | ||
3845 | /* Allow quitting out of the actual I/O. */ | |
3846 | immediate_quit = 1; | |
3847 | QUIT; | |
68c45bf0 | 3848 | this = emacs_read (fd, destination, trytry); |
3dbcf3f6 RS |
3849 | immediate_quit = 0; |
3850 | ||
3851 | if (this < 0 || this + unprocessed == 0) | |
3852 | { | |
3853 | how_much = this; | |
3854 | break; | |
3855 | } | |
3856 | ||
3857 | how_much += this; | |
3858 | ||
c8a6d68a | 3859 | if (CODING_MAY_REQUIRE_DECODING (&coding)) |
3dbcf3f6 | 3860 | { |
c8a6d68a | 3861 | int require, result; |
3dbcf3f6 RS |
3862 | |
3863 | this += unprocessed; | |
3864 | ||
3865 | /* If we are using more space than estimated, | |
3866 | make CONVERSION_BUFFER bigger. */ | |
3867 | require = decoding_buffer_size (&coding, this); | |
3868 | if (inserted + require + 2 * (total - how_much) > bufsize) | |
3869 | { | |
3870 | bufsize = inserted + require + 2 * (total - how_much); | |
92cf1086 | 3871 | conversion_buffer = (unsigned char *) xrealloc (conversion_buffer, bufsize); |
3dbcf3f6 RS |
3872 | } |
3873 | ||
3874 | /* Convert this batch with results in CONVERSION_BUFFER. */ | |
3875 | if (how_much >= total) /* This is the last block. */ | |
c8a6d68a KH |
3876 | coding.mode |= CODING_MODE_LAST_BLOCK; |
3877 | result = decode_coding (&coding, read_buf, | |
3878 | conversion_buffer + inserted, | |
3879 | this, bufsize - inserted); | |
3dbcf3f6 RS |
3880 | |
3881 | /* Save for next iteration whatever we didn't convert. */ | |
c8a6d68a KH |
3882 | unprocessed = this - coding.consumed; |
3883 | bcopy (read_buf + coding.consumed, read_buf, unprocessed); | |
3884 | this = coding.produced; | |
3dbcf3f6 RS |
3885 | } |
3886 | ||
3887 | inserted += this; | |
3888 | } | |
3889 | ||
c8a6d68a | 3890 | /* At this point, INSERTED is how many characters (i.e. bytes) |
3dbcf3f6 RS |
3891 | are present in CONVERSION_BUFFER. |
3892 | HOW_MUCH should equal TOTAL, | |
3893 | or should be <= 0 if we couldn't read the file. */ | |
3894 | ||
3895 | if (how_much < 0) | |
3896 | { | |
a36837e4 | 3897 | xfree (conversion_buffer); |
3dbcf3f6 RS |
3898 | |
3899 | if (how_much == -1) | |
3900 | error ("IO error reading %s: %s", | |
68c45bf0 | 3901 | XSTRING (orig_filename)->data, emacs_strerror (errno)); |
3dbcf3f6 RS |
3902 | else if (how_much == -2) |
3903 | error ("maximum buffer size exceeded"); | |
3904 | } | |
3905 | ||
3906 | /* Compare the beginning of the converted file | |
3907 | with the buffer text. */ | |
3908 | ||
3909 | bufpos = 0; | |
3910 | while (bufpos < inserted && same_at_start < same_at_end | |
3911 | && FETCH_BYTE (same_at_start) == conversion_buffer[bufpos]) | |
3912 | same_at_start++, bufpos++; | |
3913 | ||
3914 | /* If the file matches the buffer completely, | |
3915 | there's no need to replace anything. */ | |
3916 | ||
3917 | if (bufpos == inserted) | |
3918 | { | |
a36837e4 | 3919 | xfree (conversion_buffer); |
68c45bf0 | 3920 | emacs_close (fd); |
3dbcf3f6 RS |
3921 | specpdl_ptr--; |
3922 | /* Truncate the buffer to the size of the file. */ | |
427f5aab KH |
3923 | del_range_byte (same_at_start, same_at_end, 0); |
3924 | inserted = 0; | |
3dbcf3f6 RS |
3925 | goto handled; |
3926 | } | |
3927 | ||
20f6783d RS |
3928 | /* Extend the start of non-matching text area to multibyte |
3929 | character boundary. */ | |
3930 | if (! NILP (current_buffer->enable_multibyte_characters)) | |
3931 | while (same_at_start > BEGV_BYTE | |
3932 | && ! CHAR_HEAD_P (FETCH_BYTE (same_at_start))) | |
3933 | same_at_start--; | |
3934 | ||
3dbcf3f6 RS |
3935 | /* Scan this bufferful from the end, comparing with |
3936 | the Emacs buffer. */ | |
3937 | bufpos = inserted; | |
3938 | ||
3939 | /* Compare with same_at_start to avoid counting some buffer text | |
3940 | as matching both at the file's beginning and at the end. */ | |
3941 | while (bufpos > 0 && same_at_end > same_at_start | |
3942 | && FETCH_BYTE (same_at_end - 1) == conversion_buffer[bufpos - 1]) | |
3943 | same_at_end--, bufpos--; | |
3944 | ||
20f6783d RS |
3945 | /* Extend the end of non-matching text area to multibyte |
3946 | character boundary. */ | |
3947 | if (! NILP (current_buffer->enable_multibyte_characters)) | |
3948 | while (same_at_end < ZV_BYTE | |
3949 | && ! CHAR_HEAD_P (FETCH_BYTE (same_at_end))) | |
3950 | same_at_end++; | |
3951 | ||
3dbcf3f6 | 3952 | /* Don't try to reuse the same piece of text twice. */ |
ec7adf26 | 3953 | overlap = same_at_start - BEGV_BYTE - (same_at_end + inserted - ZV_BYTE); |
3dbcf3f6 RS |
3954 | if (overlap > 0) |
3955 | same_at_end += overlap; | |
3956 | ||
727a0b4a RS |
3957 | /* If display currently starts at beginning of line, |
3958 | keep it that way. */ | |
3959 | if (XBUFFER (XWINDOW (selected_window)->buffer) == current_buffer) | |
3960 | XWINDOW (selected_window)->start_at_line_beg = Fbolp (); | |
3961 | ||
3dbcf3f6 RS |
3962 | /* Replace the chars that we need to replace, |
3963 | and update INSERTED to equal the number of bytes | |
3964 | we are taking from the file. */ | |
ec7adf26 | 3965 | inserted -= (Z_BYTE - same_at_end) + (same_at_start - BEG_BYTE); |
427f5aab | 3966 | |
643c73b9 | 3967 | if (same_at_end != same_at_start) |
427f5aab KH |
3968 | { |
3969 | del_range_byte (same_at_start, same_at_end, 0); | |
3970 | temp = GPT; | |
3971 | same_at_start = GPT_BYTE; | |
3972 | } | |
643c73b9 RS |
3973 | else |
3974 | { | |
643c73b9 | 3975 | temp = BYTE_TO_CHAR (same_at_start); |
643c73b9 | 3976 | } |
427f5aab KH |
3977 | /* Insert from the file at the proper position. */ |
3978 | SET_PT_BOTH (temp, same_at_start); | |
ec7adf26 RS |
3979 | insert_1 (conversion_buffer + same_at_start - BEG_BYTE, inserted, |
3980 | 0, 0, 0); | |
427f5aab KH |
3981 | /* Set `inserted' to the number of inserted characters. */ |
3982 | inserted = PT - temp; | |
3dbcf3f6 RS |
3983 | |
3984 | free (conversion_buffer); | |
68c45bf0 | 3985 | emacs_close (fd); |
3dbcf3f6 RS |
3986 | specpdl_ptr--; |
3987 | ||
3dbcf3f6 | 3988 | goto handled; |
3d0387c0 RS |
3989 | } |
3990 | ||
d4b8687b RS |
3991 | if (! not_regular) |
3992 | { | |
3993 | register Lisp_Object temp; | |
7fded690 | 3994 | |
d4b8687b | 3995 | total = XINT (end) - XINT (beg); |
570d7624 | 3996 | |
d4b8687b RS |
3997 | /* Make sure point-max won't overflow after this insertion. */ |
3998 | XSETINT (temp, total); | |
3999 | if (total != XINT (temp)) | |
4000 | error ("Maximum buffer size exceeded"); | |
4001 | } | |
4002 | else | |
4003 | /* For a special file, all we can do is guess. */ | |
4004 | total = READ_BUF_SIZE; | |
570d7624 | 4005 | |
57d8d468 | 4006 | if (NILP (visit) && total > 0) |
6c478ee2 | 4007 | prepare_to_modify_buffer (PT, PT, NULL); |
570d7624 | 4008 | |
7fe52289 | 4009 | move_gap (PT); |
7fded690 JB |
4010 | if (GAP_SIZE < total) |
4011 | make_gap (total - GAP_SIZE); | |
4012 | ||
a1d2b64a | 4013 | if (XINT (beg) != 0 || !NILP (replace)) |
7fded690 JB |
4014 | { |
4015 | if (lseek (fd, XINT (beg), 0) < 0) | |
b1d1b865 RS |
4016 | report_file_error ("Setting file position", |
4017 | Fcons (orig_filename, Qnil)); | |
7fded690 JB |
4018 | } |
4019 | ||
6fdaa9a0 | 4020 | /* In the following loop, HOW_MUCH contains the total bytes read so |
c8a6d68a KH |
4021 | far for a regular file, and not changed for a special file. But, |
4022 | before exiting the loop, it is set to a negative value if I/O | |
4023 | error occurs. */ | |
a1d2b64a | 4024 | how_much = 0; |
6fdaa9a0 KH |
4025 | /* Total bytes inserted. */ |
4026 | inserted = 0; | |
c8a6d68a KH |
4027 | /* Here, we don't do code conversion in the loop. It is done by |
4028 | code_convert_region after all data are read into the buffer. */ | |
6fdaa9a0 | 4029 | while (how_much < total) |
570d7624 | 4030 | { |
5e570b75 | 4031 | /* try is reserved in some compilers (Microsoft C) */ |
c8a6d68a KH |
4032 | int trytry = min (total - how_much, READ_BUF_SIZE); |
4033 | int this; | |
4034 | ||
4035 | /* For a special file, GAP_SIZE should be checked every time. */ | |
4036 | if (not_regular && GAP_SIZE < trytry) | |
4037 | make_gap (total - GAP_SIZE); | |
b5148e85 RS |
4038 | |
4039 | /* Allow quitting out of the actual I/O. */ | |
4040 | immediate_quit = 1; | |
4041 | QUIT; | |
68c45bf0 PE |
4042 | this = emacs_read (fd, BYTE_POS_ADDR (PT_BYTE + inserted - 1) + 1, |
4043 | trytry); | |
b5148e85 | 4044 | immediate_quit = 0; |
570d7624 | 4045 | |
c8a6d68a | 4046 | if (this <= 0) |
570d7624 JB |
4047 | { |
4048 | how_much = this; | |
4049 | break; | |
4050 | } | |
4051 | ||
c8a6d68a KH |
4052 | GAP_SIZE -= this; |
4053 | GPT_BYTE += this; | |
4054 | ZV_BYTE += this; | |
4055 | Z_BYTE += this; | |
4056 | GPT += this; | |
4057 | ZV += this; | |
4058 | Z += this; | |
4059 | ||
d4b8687b RS |
4060 | /* For a regular file, where TOTAL is the real size, |
4061 | count HOW_MUCH to compare with it. | |
4062 | For a special file, where TOTAL is just a buffer size, | |
4063 | so don't bother counting in HOW_MUCH. | |
4064 | (INSERTED is where we count the number of characters inserted.) */ | |
4065 | if (! not_regular) | |
4066 | how_much += this; | |
c8a6d68a KH |
4067 | inserted += this; |
4068 | } | |
6fdaa9a0 | 4069 | |
c8a6d68a KH |
4070 | if (GAP_SIZE > 0) |
4071 | /* Put an anchor to ensure multi-byte form ends at gap. */ | |
4072 | *GPT_ADDR = 0; | |
d4b8687b | 4073 | |
68c45bf0 | 4074 | emacs_close (fd); |
6fdaa9a0 | 4075 | |
c8a6d68a KH |
4076 | /* Discard the unwind protect for closing the file. */ |
4077 | specpdl_ptr--; | |
6fdaa9a0 | 4078 | |
c8a6d68a KH |
4079 | if (how_much < 0) |
4080 | error ("IO error reading %s: %s", | |
68c45bf0 | 4081 | XSTRING (orig_filename)->data, emacs_strerror (errno)); |
ec7adf26 | 4082 | |
2df42e09 | 4083 | if (! coding_system_decided) |
c8a6d68a | 4084 | { |
2df42e09 | 4085 | /* The coding system is not yet decided. Decide it by an |
dfe35e7b RS |
4086 | optimized method for handling `coding:' tag. |
4087 | ||
4088 | Note that we can get here only if the buffer was empty | |
4089 | before the insertion. */ | |
2df42e09 KH |
4090 | Lisp_Object val; |
4091 | val = Qnil; | |
f736ffbf | 4092 | |
2df42e09 KH |
4093 | if (!NILP (Vcoding_system_for_read)) |
4094 | val = Vcoding_system_for_read; | |
4095 | else | |
4096 | { | |
98a7d268 KH |
4097 | /* Since we are sure that the current buffer was empty |
4098 | before the insertion, we can toggle | |
4099 | enable-multibyte-characters directly here without taking | |
4100 | care of marker adjustment and byte combining problem. By | |
4101 | this way, we can run Lisp program safely before decoding | |
4102 | the inserted text. */ | |
4103 | Lisp_Object unwind_data; | |
2df42e09 KH |
4104 | int count = specpdl_ptr - specpdl; |
4105 | ||
98a7d268 KH |
4106 | unwind_data = Fcons (current_buffer->enable_multibyte_characters, |
4107 | Fcons (current_buffer->undo_list, | |
4108 | Fcurrent_buffer ())); | |
2df42e09 | 4109 | current_buffer->enable_multibyte_characters = Qnil; |
98a7d268 KH |
4110 | current_buffer->undo_list = Qt; |
4111 | record_unwind_protect (decide_coding_unwind, unwind_data); | |
4112 | ||
4113 | if (inserted > 0 && ! NILP (Vset_auto_coding_function)) | |
4114 | { | |
1255deb9 KH |
4115 | val = call2 (Vset_auto_coding_function, |
4116 | filename, make_number (inserted)); | |
2df42e09 | 4117 | } |
f736ffbf | 4118 | |
2df42e09 KH |
4119 | if (NILP (val)) |
4120 | { | |
4121 | /* If the coding system is not yet decided, check | |
4122 | file-coding-system-alist. */ | |
4123 | Lisp_Object args[6], coding_systems; | |
f736ffbf | 4124 | |
2df42e09 KH |
4125 | args[0] = Qinsert_file_contents, args[1] = orig_filename; |
4126 | args[2] = visit, args[3] = beg, args[4] = end, args[5] = Qnil; | |
4127 | coding_systems = Ffind_operation_coding_system (6, args); | |
4128 | if (CONSP (coding_systems)) | |
03699b14 | 4129 | val = XCAR (coding_systems); |
f736ffbf | 4130 | } |
98a7d268 KH |
4131 | |
4132 | unbind_to (count, Qnil); | |
4133 | inserted = Z_BYTE - BEG_BYTE; | |
2df42e09 | 4134 | } |
f736ffbf | 4135 | |
2df42e09 KH |
4136 | /* The following kludgy code is to avoid some compiler bug. |
4137 | We can't simply do | |
4138 | setup_coding_system (val, &coding); | |
4139 | on some system. */ | |
4140 | { | |
4141 | struct coding_system temp_coding; | |
4142 | setup_coding_system (val, &temp_coding); | |
4143 | bcopy (&temp_coding, &coding, sizeof coding); | |
4144 | } | |
f736ffbf | 4145 | |
237a6fd2 RS |
4146 | if (NILP (current_buffer->enable_multibyte_characters) |
4147 | && ! NILP (val)) | |
4148 | /* We must suppress all character code conversion except for | |
2df42e09 KH |
4149 | end-of-line conversion. */ |
4150 | setup_raw_text_coding_system (&coding); | |
4151 | } | |
f736ffbf | 4152 | |
c91beee2 | 4153 | if (inserted > 0 || coding.type == coding_type_ccl) |
2df42e09 | 4154 | { |
c8a6d68a | 4155 | if (CODING_MAY_REQUIRE_DECODING (&coding)) |
64e0ae2a | 4156 | { |
f4ac86af KH |
4157 | /* Here, we don't have to consider byte combining (see the |
4158 | comment below) because code_convert_region takes care of | |
4159 | it. */ | |
64e0ae2a KH |
4160 | code_convert_region (PT, PT_BYTE, PT + inserted, PT_BYTE + inserted, |
4161 | &coding, 0, 0); | |
4162 | inserted = (NILP (current_buffer->enable_multibyte_characters) | |
4163 | ? coding.produced : coding.produced_char); | |
4164 | } | |
f8198e19 KH |
4165 | else if (!NILP (current_buffer->enable_multibyte_characters)) |
4166 | { | |
4167 | int inserted_byte = inserted; | |
4168 | ||
f4ac86af KH |
4169 | /* There's a possibility that we must combine bytes at the |
4170 | head (resp. the tail) of the just inserted text with the | |
4171 | bytes before (resp. after) the gap to form a single | |
12fccb85 KH |
4172 | character. */ |
4173 | inserted = multibyte_chars_in_text (GPT_ADDR - inserted, inserted); | |
4174 | adjust_after_insert (PT, PT_BYTE, | |
4175 | PT + inserted_byte, PT_BYTE + inserted_byte, | |
4176 | inserted); | |
f8198e19 | 4177 | } |
e9cea947 AS |
4178 | else |
4179 | adjust_after_insert (PT, PT_BYTE, PT + inserted, PT_BYTE + inserted, | |
4180 | inserted); | |
2df42e09 | 4181 | } |
570d7624 | 4182 | |
04e6f79c | 4183 | #ifdef DOS_NT |
2df42e09 KH |
4184 | /* Use the conversion type to determine buffer-file-type |
4185 | (find-buffer-file-type is now used to help determine the | |
4186 | conversion). */ | |
4187 | if ((coding.eol_type == CODING_EOL_UNDECIDED | |
4188 | || coding.eol_type == CODING_EOL_LF) | |
4189 | && ! CODING_REQUIRE_DECODING (&coding)) | |
4190 | current_buffer->buffer_file_type = Qt; | |
4191 | else | |
4192 | current_buffer->buffer_file_type = Qnil; | |
04e6f79c | 4193 | #endif |
570d7624 JB |
4194 | |
4195 | notfound: | |
32f4334d | 4196 | handled: |
570d7624 | 4197 | |
265a9e55 | 4198 | if (!NILP (visit)) |
570d7624 | 4199 | { |
cfadd376 RS |
4200 | if (!EQ (current_buffer->undo_list, Qt)) |
4201 | current_buffer->undo_list = Qnil; | |
570d7624 JB |
4202 | #ifdef APOLLO |
4203 | stat (XSTRING (filename)->data, &st); | |
4204 | #endif | |
62bcf009 | 4205 | |
a7e82472 RS |
4206 | if (NILP (handler)) |
4207 | { | |
4208 | current_buffer->modtime = st.st_mtime; | |
b1d1b865 | 4209 | current_buffer->filename = orig_filename; |
a7e82472 | 4210 | } |
62bcf009 | 4211 | |
95385625 | 4212 | SAVE_MODIFF = MODIFF; |
570d7624 | 4213 | current_buffer->auto_save_modified = MODIFF; |
2acfd7ae | 4214 | XSETFASTINT (current_buffer->save_length, Z - BEG); |
570d7624 | 4215 | #ifdef CLASH_DETECTION |
32f4334d RS |
4216 | if (NILP (handler)) |
4217 | { | |
f471f4c2 RS |
4218 | if (!NILP (current_buffer->file_truename)) |
4219 | unlock_file (current_buffer->file_truename); | |
32f4334d RS |
4220 | unlock_file (filename); |
4221 | } | |
570d7624 | 4222 | #endif /* CLASH_DETECTION */ |
330bfe57 RS |
4223 | if (not_regular) |
4224 | Fsignal (Qfile_error, | |
4225 | Fcons (build_string ("not a regular file"), | |
b1d1b865 | 4226 | Fcons (orig_filename, Qnil))); |
330bfe57 | 4227 | |
570d7624 | 4228 | /* If visiting nonexistent file, return nil. */ |
32f4334d | 4229 | if (current_buffer->modtime == -1) |
b1d1b865 | 4230 | report_file_error ("Opening input file", Fcons (orig_filename, Qnil)); |
570d7624 JB |
4231 | } |
4232 | ||
0d420e88 | 4233 | /* Decode file format */ |
c8a6d68a | 4234 | if (inserted > 0) |
0d420e88 | 4235 | { |
199607e4 | 4236 | insval = call3 (Qformat_decode, |
c8a6d68a | 4237 | Qnil, make_number (inserted), visit); |
0d420e88 | 4238 | CHECK_NUMBER (insval, 0); |
c8a6d68a | 4239 | inserted = XFASTINT (insval); |
0d420e88 BG |
4240 | } |
4241 | ||
ce51c54c KH |
4242 | if (set_coding_system) |
4243 | Vlast_coding_system_used = coding.symbol; | |
4244 | ||
0342d8c5 RS |
4245 | /* Call after-change hooks for the inserted text, aside from the case |
4246 | of normal visiting (not with REPLACE), which is done in a new buffer | |
4247 | "before" the buffer is changed. */ | |
c8a6d68a | 4248 | if (inserted > 0 && total > 0 |
0342d8c5 | 4249 | && (NILP (visit) || !NILP (replace))) |
ce51c54c KH |
4250 | { |
4251 | signal_after_change (PT, 0, inserted); | |
4252 | update_compositions (PT, PT, CHECK_BORDER); | |
4253 | } | |
b56567b5 | 4254 | |
d6a3cc15 RS |
4255 | if (inserted > 0) |
4256 | { | |
4257 | p = Vafter_insert_file_functions; | |
4258 | while (!NILP (p)) | |
4259 | { | |
c8a6d68a | 4260 | insval = call1 (Fcar (p), make_number (inserted)); |
d6a3cc15 RS |
4261 | if (!NILP (insval)) |
4262 | { | |
4263 | CHECK_NUMBER (insval, 0); | |
c8a6d68a | 4264 | inserted = XFASTINT (insval); |
d6a3cc15 RS |
4265 | } |
4266 | QUIT; | |
4267 | p = Fcdr (p); | |
4268 | } | |
4269 | } | |
4270 | ||
ec7adf26 | 4271 | /* ??? Retval needs to be dealt with in all cases consistently. */ |
a1d2b64a | 4272 | if (NILP (val)) |
b1d1b865 | 4273 | val = Fcons (orig_filename, |
a1d2b64a RS |
4274 | Fcons (make_number (inserted), |
4275 | Qnil)); | |
4276 | ||
4277 | RETURN_UNGCPRO (unbind_to (count, val)); | |
570d7624 | 4278 | } |
7fded690 | 4279 | \f |
ec7adf26 RS |
4280 | static Lisp_Object build_annotations P_ ((Lisp_Object, Lisp_Object, |
4281 | Lisp_Object)); | |
d6a3cc15 | 4282 | |
6fc6f94b | 4283 | /* If build_annotations switched buffers, switch back to BUF. |
6fdaa9a0 KH |
4284 | Kill the temporary buffer that was selected in the meantime. |
4285 | ||
4286 | Since this kill only the last temporary buffer, some buffers remain | |
4287 | not killed if build_annotations switched buffers more than once. | |
4288 | -- K.Handa */ | |
6fc6f94b | 4289 | |
199607e4 | 4290 | static Lisp_Object |
6fc6f94b RS |
4291 | build_annotations_unwind (buf) |
4292 | Lisp_Object buf; | |
4293 | { | |
4294 | Lisp_Object tembuf; | |
4295 | ||
4296 | if (XBUFFER (buf) == current_buffer) | |
4297 | return Qnil; | |
4298 | tembuf = Fcurrent_buffer (); | |
4299 | Fset_buffer (buf); | |
4300 | Fkill_buffer (tembuf); | |
4301 | return Qnil; | |
4302 | } | |
4303 | ||
de1d0127 RS |
4304 | DEFUN ("write-region", Fwrite_region, Swrite_region, 3, 7, |
4305 | "r\nFWrite region to file: \ni\ni\ni\np", | |
570d7624 JB |
4306 | "Write current region into specified file.\n\ |
4307 | When called from a program, takes three arguments:\n\ | |
4308 | START, END and FILENAME. START and END are buffer positions.\n\ | |
4309 | Optional fourth argument APPEND if non-nil means\n\ | |
4310 | append to existing file contents (if any).\n\ | |
4311 | Optional fifth argument VISIT if t means\n\ | |
4312 | set the last-save-file-modtime of buffer to this file's modtime\n\ | |
4313 | and mark buffer not modified.\n\ | |
3b7792ed RS |
4314 | If VISIT is a string, it is a second file name;\n\ |
4315 | the output goes to FILENAME, but the buffer is marked as visiting VISIT.\n\ | |
4316 | VISIT is also the file name to lock and unlock for clash detection.\n\ | |
1d386d28 RS |
4317 | If VISIT is neither t nor nil nor a string,\n\ |
4318 | that means do not print the \"Wrote file\" message.\n\ | |
7204a979 | 4319 | The optional sixth arg LOCKNAME, if non-nil, specifies the name to\n\ |
8b68aae7 | 4320 | use for locking and unlocking, overriding FILENAME and VISIT.\n\ |
f7b4065f RS |
4321 | The optional seventh arg MUSTBENEW, if non-nil, insists on a check\n\ |
4322 | for an existing file with the same name. If MUSTBENEW is `excl',\n\ | |
4323 | that means to get an error if the file already exists; never overwrite.\n\ | |
4324 | If MUSTBENEW is neither nil nor `excl', that means ask for\n\ | |
4325 | confirmation before overwriting, but do go ahead and overwrite the file\n\ | |
4326 | if the user confirms.\n\ | |
570d7624 | 4327 | Kludgy feature: if START is a string, then that string is written\n\ |
6cf71bf1 KH |
4328 | to the file, instead of any buffer contents, and END is ignored.\n\ |
4329 | \n\ | |
4330 | This does code conversion according to the value of\n\ | |
4331 | `coding-system-for-write', `buffer-file-coding-system', or\n\ | |
4332 | `file-coding-system-alist', and sets the variable\n\ | |
4333 | `last-coding-system-used' to the coding system actually used.") | |
4334 | ||
f7b4065f RS |
4335 | (start, end, filename, append, visit, lockname, mustbenew) |
4336 | Lisp_Object start, end, filename, append, visit, lockname, mustbenew; | |
570d7624 JB |
4337 | { |
4338 | register int desc; | |
4339 | int failure; | |
4340 | int save_errno; | |
4341 | unsigned char *fn; | |
4342 | struct stat st; | |
c975dd7a | 4343 | int tem; |
570d7624 | 4344 | int count = specpdl_ptr - specpdl; |
6fc6f94b | 4345 | int count1; |
570d7624 | 4346 | #ifdef VMS |
5e570b75 | 4347 | unsigned char *fname = 0; /* If non-0, original filename (must rename) */ |
570d7624 | 4348 | #endif /* VMS */ |
3eac9910 | 4349 | Lisp_Object handler; |
4ad827c5 | 4350 | Lisp_Object visit_file; |
d6a3cc15 | 4351 | Lisp_Object annotations; |
b1d1b865 | 4352 | Lisp_Object encoded_filename; |
d6a3cc15 | 4353 | int visiting, quietly; |
7204a979 | 4354 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4, gcpro5; |
6fc6f94b | 4355 | struct buffer *given_buffer; |
5e570b75 | 4356 | #ifdef DOS_NT |
fa228724 | 4357 | int buffer_file_type = O_BINARY; |
5e570b75 | 4358 | #endif /* DOS_NT */ |
6fdaa9a0 | 4359 | struct coding_system coding; |
570d7624 | 4360 | |
95385625 RS |
4361 | if (current_buffer->base_buffer && ! NILP (visit)) |
4362 | error ("Cannot do file visiting in an indirect buffer"); | |
4363 | ||
561cb8e1 | 4364 | if (!NILP (start) && !STRINGP (start)) |
570d7624 JB |
4365 | validate_region (&start, &end); |
4366 | ||
115af127 | 4367 | GCPRO4 (start, filename, visit, lockname); |
cdfb0f1d | 4368 | |
b1d1b865 | 4369 | /* Decide the coding-system to encode the data with. */ |
cdfb0f1d KH |
4370 | { |
4371 | Lisp_Object val; | |
4372 | ||
cbc64b2a | 4373 | if (auto_saving) |
cdfb0f1d | 4374 | val = Qnil; |
cdfb0f1d KH |
4375 | else if (!NILP (Vcoding_system_for_write)) |
4376 | val = Vcoding_system_for_write; | |
1255deb9 | 4377 | else |
450c1a67 KH |
4378 | { |
4379 | /* If the variable `buffer-file-coding-system' is set locally, | |
4380 | it means that the file was read with some kind of code | |
4381 | conversion or the varialbe is explicitely set by users. We | |
4382 | had better write it out with the same coding system even if | |
4383 | `enable-multibyte-characters' is nil. | |
4384 | ||
c8a6d68a | 4385 | If it is not set locally, we anyway have to convert EOL |
450c1a67 KH |
4386 | format if the default value of `buffer-file-coding-system' |
4387 | tells that it is not Unix-like (LF only) format. */ | |
ef38927f KH |
4388 | int using_default_coding = 0; |
4389 | int force_raw_text = 0; | |
4390 | ||
450c1a67 | 4391 | val = current_buffer->buffer_file_coding_system; |
1255deb9 KH |
4392 | if (NILP (val) |
4393 | || NILP (Flocal_variable_p (Qbuffer_file_coding_system, Qnil))) | |
450c1a67 | 4394 | { |
450c1a67 | 4395 | val = Qnil; |
ef38927f KH |
4396 | if (NILP (current_buffer->enable_multibyte_characters)) |
4397 | force_raw_text = 1; | |
450c1a67 | 4398 | } |
ef38927f | 4399 | |
1255deb9 KH |
4400 | if (NILP (val)) |
4401 | { | |
4402 | /* Check file-coding-system-alist. */ | |
4403 | Lisp_Object args[7], coding_systems; | |
4404 | ||
4405 | args[0] = Qwrite_region; args[1] = start; args[2] = end; | |
4406 | args[3] = filename; args[4] = append; args[5] = visit; | |
4407 | args[6] = lockname; | |
4408 | coding_systems = Ffind_operation_coding_system (7, args); | |
03699b14 KR |
4409 | if (CONSP (coding_systems) && !NILP (XCDR (coding_systems))) |
4410 | val = XCDR (coding_systems); | |
1255deb9 KH |
4411 | } |
4412 | ||
ef38927f KH |
4413 | if (NILP (val) |
4414 | && !NILP (current_buffer->buffer_file_coding_system)) | |
4415 | { | |
4416 | /* If we still have not decided a coding system, use the | |
4417 | default value of buffer-file-coding-system. */ | |
4418 | val = current_buffer->buffer_file_coding_system; | |
4419 | using_default_coding = 1; | |
4420 | } | |
1255deb9 | 4421 | |
ef38927f | 4422 | if (!force_raw_text |
1255deb9 KH |
4423 | && !NILP (Ffboundp (Vselect_safe_coding_system_function))) |
4424 | /* Confirm that VAL can surely encode the current region. */ | |
c8a6d68a | 4425 | val = call3 (Vselect_safe_coding_system_function, start, end, val); |
ef38927f KH |
4426 | |
4427 | setup_coding_system (Fcheck_coding_system (val), &coding); | |
4428 | if (coding.eol_type == CODING_EOL_UNDECIDED | |
4429 | && !using_default_coding) | |
4430 | { | |
4431 | if (! EQ (default_buffer_file_coding.symbol, | |
4432 | buffer_defaults.buffer_file_coding_system)) | |
4433 | setup_coding_system (buffer_defaults.buffer_file_coding_system, | |
4434 | &default_buffer_file_coding); | |
4435 | if (default_buffer_file_coding.eol_type != CODING_EOL_UNDECIDED) | |
4436 | { | |
4437 | Lisp_Object subsidiaries; | |
4438 | ||
4439 | coding.eol_type = default_buffer_file_coding.eol_type; | |
4440 | subsidiaries = Fget (coding.symbol, Qeol_type); | |
4441 | if (VECTORP (subsidiaries) | |
4442 | && XVECTOR (subsidiaries)->size == 3) | |
4443 | coding.symbol | |
4444 | = XVECTOR (subsidiaries)->contents[coding.eol_type]; | |
4445 | } | |
4446 | } | |
4447 | ||
4448 | if (force_raw_text) | |
4449 | setup_raw_text_coding_system (&coding); | |
4450 | goto done_setup_coding; | |
cdfb0f1d | 4451 | } |
ef38927f | 4452 | |
1255deb9 | 4453 | setup_coding_system (Fcheck_coding_system (val), &coding); |
450c1a67 KH |
4454 | |
4455 | done_setup_coding: | |
cdfb0f1d | 4456 | if (!STRINGP (start) && !NILP (current_buffer->selective_display)) |
c8a6d68a | 4457 | coding.mode |= CODING_MODE_SELECTIVE_DISPLAY; |
cdfb0f1d KH |
4458 | } |
4459 | ||
b56567b5 KH |
4460 | Vlast_coding_system_used = coding.symbol; |
4461 | ||
570d7624 | 4462 | filename = Fexpand_file_name (filename, Qnil); |
de1d0127 | 4463 | |
72bba429 | 4464 | if (! NILP (mustbenew) && mustbenew != Qexcl) |
b8b29dc9 | 4465 | barf_or_query_if_file_exists (filename, "overwrite", 1, 0, 1); |
de1d0127 | 4466 | |
561cb8e1 | 4467 | if (STRINGP (visit)) |
e5176bae | 4468 | visit_file = Fexpand_file_name (visit, Qnil); |
4ad827c5 RS |
4469 | else |
4470 | visit_file = filename; | |
1a04498e | 4471 | UNGCPRO; |
4ad827c5 | 4472 | |
561cb8e1 | 4473 | visiting = (EQ (visit, Qt) || STRINGP (visit)); |
d6a3cc15 RS |
4474 | quietly = !NILP (visit); |
4475 | ||
4476 | annotations = Qnil; | |
4477 | ||
7204a979 RS |
4478 | if (NILP (lockname)) |
4479 | lockname = visit_file; | |
4480 | ||
4481 | GCPRO5 (start, filename, annotations, visit_file, lockname); | |
570d7624 | 4482 | |
32f4334d RS |
4483 | /* If the file name has special constructs in it, |
4484 | call the corresponding file handler. */ | |
49307295 | 4485 | handler = Ffind_file_name_handler (filename, Qwrite_region); |
b56ad927 | 4486 | /* If FILENAME has no handler, see if VISIT has one. */ |
93c30b5f | 4487 | if (NILP (handler) && STRINGP (visit)) |
199607e4 | 4488 | handler = Ffind_file_name_handler (visit, Qwrite_region); |
3eac9910 | 4489 | |
32f4334d RS |
4490 | if (!NILP (handler)) |
4491 | { | |
32f4334d | 4492 | Lisp_Object val; |
51cf6d37 RS |
4493 | val = call6 (handler, Qwrite_region, start, end, |
4494 | filename, append, visit); | |
32f4334d | 4495 | |
d6a3cc15 | 4496 | if (visiting) |
32f4334d | 4497 | { |
95385625 | 4498 | SAVE_MODIFF = MODIFF; |
2acfd7ae | 4499 | XSETFASTINT (current_buffer->save_length, Z - BEG); |
3b7792ed | 4500 | current_buffer->filename = visit_file; |
32f4334d | 4501 | } |
09121adc | 4502 | UNGCPRO; |
32f4334d RS |
4503 | return val; |
4504 | } | |
4505 | ||
561cb8e1 RS |
4506 | /* Special kludge to simplify auto-saving. */ |
4507 | if (NILP (start)) | |
4508 | { | |
2acfd7ae KH |
4509 | XSETFASTINT (start, BEG); |
4510 | XSETFASTINT (end, Z); | |
561cb8e1 RS |
4511 | } |
4512 | ||
6fc6f94b RS |
4513 | record_unwind_protect (build_annotations_unwind, Fcurrent_buffer ()); |
4514 | count1 = specpdl_ptr - specpdl; | |
4515 | ||
4516 | given_buffer = current_buffer; | |
6fdaa9a0 | 4517 | annotations = build_annotations (start, end, coding.pre_write_conversion); |
6fc6f94b RS |
4518 | if (current_buffer != given_buffer) |
4519 | { | |
3cf29f61 RS |
4520 | XSETFASTINT (start, BEGV); |
4521 | XSETFASTINT (end, ZV); | |
6fc6f94b | 4522 | } |
d6a3cc15 | 4523 | |
570d7624 JB |
4524 | #ifdef CLASH_DETECTION |
4525 | if (!auto_saving) | |
84f6296a | 4526 | { |
a9171faa | 4527 | #if 0 /* This causes trouble for GNUS. */ |
84f6296a RS |
4528 | /* If we've locked this file for some other buffer, |
4529 | query before proceeding. */ | |
4530 | if (!visiting && EQ (Ffile_locked_p (lockname), Qt)) | |
bffd00b0 | 4531 | call2 (intern ("ask-user-about-lock"), filename, Vuser_login_name); |
a9171faa | 4532 | #endif |
84f6296a RS |
4533 | |
4534 | lock_file (lockname); | |
4535 | } | |
570d7624 JB |
4536 | #endif /* CLASH_DETECTION */ |
4537 | ||
b1d1b865 RS |
4538 | encoded_filename = ENCODE_FILE (filename); |
4539 | ||
4540 | fn = XSTRING (encoded_filename)->data; | |
570d7624 | 4541 | desc = -1; |
265a9e55 | 4542 | if (!NILP (append)) |
5e570b75 | 4543 | #ifdef DOS_NT |
68c45bf0 | 4544 | desc = emacs_open (fn, O_WRONLY | buffer_file_type, 0); |
5e570b75 | 4545 | #else /* not DOS_NT */ |
68c45bf0 | 4546 | desc = emacs_open (fn, O_WRONLY, 0); |
5e570b75 | 4547 | #endif /* not DOS_NT */ |
570d7624 | 4548 | |
b1d1b865 | 4549 | if (desc < 0 && (NILP (append) || errno == ENOENT)) |
570d7624 | 4550 | #ifdef VMS |
5e570b75 | 4551 | if (auto_saving) /* Overwrite any previous version of autosave file */ |
570d7624 | 4552 | { |
5e570b75 | 4553 | vms_truncate (fn); /* if fn exists, truncate to zero length */ |
68c45bf0 | 4554 | desc = emacs_open (fn, O_RDWR, 0); |
570d7624 | 4555 | if (desc < 0) |
561cb8e1 | 4556 | desc = creat_copy_attrs (STRINGP (current_buffer->filename) |
b72dea2a JB |
4557 | ? XSTRING (current_buffer->filename)->data : 0, |
4558 | fn); | |
570d7624 | 4559 | } |
5e570b75 | 4560 | else /* Write to temporary name and rename if no errors */ |
570d7624 JB |
4561 | { |
4562 | Lisp_Object temp_name; | |
4563 | temp_name = Ffile_name_directory (filename); | |
4564 | ||
265a9e55 | 4565 | if (!NILP (temp_name)) |
570d7624 JB |
4566 | { |
4567 | temp_name = Fmake_temp_name (concat2 (temp_name, | |
4568 | build_string ("$$SAVE$$"))); | |
4569 | fname = XSTRING (filename)->data; | |
4570 | fn = XSTRING (temp_name)->data; | |
4571 | desc = creat_copy_attrs (fname, fn); | |
4572 | if (desc < 0) | |
4573 | { | |
4574 | /* If we can't open the temporary file, try creating a new | |
4575 | version of the original file. VMS "creat" creates a | |
4576 | new version rather than truncating an existing file. */ | |
4577 | fn = fname; | |
4578 | fname = 0; | |
4579 | desc = creat (fn, 0666); | |
4580 | #if 0 /* This can clobber an existing file and fail to replace it, | |
4581 | if the user runs out of space. */ | |
4582 | if (desc < 0) | |
4583 | { | |
4584 | /* We can't make a new version; | |
4585 | try to truncate and rewrite existing version if any. */ | |
4586 | vms_truncate (fn); | |
68c45bf0 | 4587 | desc = emacs_open (fn, O_RDWR, 0); |
570d7624 JB |
4588 | } |
4589 | #endif | |
4590 | } | |
4591 | } | |
4592 | else | |
4593 | desc = creat (fn, 0666); | |
4594 | } | |
4595 | #else /* not VMS */ | |
5e570b75 | 4596 | #ifdef DOS_NT |
68c45bf0 PE |
4597 | desc = emacs_open (fn, |
4598 | O_WRONLY | O_TRUNC | O_CREAT | buffer_file_type | |
4599 | | (mustbenew == Qexcl ? O_EXCL : 0), | |
4600 | S_IREAD | S_IWRITE); | |
5e570b75 | 4601 | #else /* not DOS_NT */ |
68c45bf0 PE |
4602 | desc = emacs_open (fn, O_WRONLY | O_TRUNC | O_CREAT |
4603 | | (mustbenew == Qexcl ? O_EXCL : 0), | |
4604 | auto_saving ? auto_save_mode_bits : 0666); | |
5e570b75 | 4605 | #endif /* not DOS_NT */ |
570d7624 JB |
4606 | #endif /* not VMS */ |
4607 | ||
09121adc RS |
4608 | UNGCPRO; |
4609 | ||
570d7624 JB |
4610 | if (desc < 0) |
4611 | { | |
4612 | #ifdef CLASH_DETECTION | |
4613 | save_errno = errno; | |
7204a979 | 4614 | if (!auto_saving) unlock_file (lockname); |
570d7624 JB |
4615 | errno = save_errno; |
4616 | #endif /* CLASH_DETECTION */ | |
4617 | report_file_error ("Opening output file", Fcons (filename, Qnil)); | |
4618 | } | |
4619 | ||
4620 | record_unwind_protect (close_file_unwind, make_number (desc)); | |
4621 | ||
c1c4693e | 4622 | if (!NILP (append) && !NILP (Ffile_regular_p (filename))) |
570d7624 JB |
4623 | if (lseek (desc, 0, 2) < 0) |
4624 | { | |
4625 | #ifdef CLASH_DETECTION | |
7204a979 | 4626 | if (!auto_saving) unlock_file (lockname); |
570d7624 JB |
4627 | #endif /* CLASH_DETECTION */ |
4628 | report_file_error ("Lseek error", Fcons (filename, Qnil)); | |
4629 | } | |
4630 | ||
4631 | #ifdef VMS | |
4632 | /* | |
4633 | * Kludge Warning: The VMS C RTL likes to insert carriage returns | |
4634 | * if we do writes that don't end with a carriage return. Furthermore | |
4635 | * it cannot handle writes of more then 16K. The modified | |
4636 | * version of "sys_write" in SYSDEP.C (see comment there) copes with | |
4637 | * this EXCEPT for the last record (iff it doesn't end with a carriage | |
4638 | * return). This implies that if your buffer doesn't end with a carriage | |
4639 | * return, you get one free... tough. However it also means that if | |
4640 | * we make two calls to sys_write (a la the following code) you can | |
4641 | * get one at the gap as well. The easiest way to fix this (honest) | |
4642 | * is to move the gap to the next newline (or the end of the buffer). | |
4643 | * Thus this change. | |
4644 | * | |
4645 | * Yech! | |
4646 | */ | |
4647 | if (GPT > BEG && GPT_ADDR[-1] != '\n') | |
4648 | move_gap (find_next_newline (GPT, 1)); | |
cdfb0f1d KH |
4649 | #else |
4650 | /* Whether VMS or not, we must move the gap to the next of newline | |
4651 | when we must put designation sequences at beginning of line. */ | |
4652 | if (INTEGERP (start) | |
4653 | && coding.type == coding_type_iso2022 | |
4654 | && coding.flags & CODING_FLAG_ISO_DESIGNATE_AT_BOL | |
4655 | && GPT > BEG && GPT_ADDR[-1] != '\n') | |
ec7adf26 RS |
4656 | { |
4657 | int opoint = PT, opoint_byte = PT_BYTE; | |
4658 | scan_newline (PT, PT_BYTE, ZV, ZV_BYTE, 1, 0); | |
4659 | move_gap_both (PT, PT_BYTE); | |
4660 | SET_PT_BOTH (opoint, opoint_byte); | |
4661 | } | |
570d7624 JB |
4662 | #endif |
4663 | ||
4664 | failure = 0; | |
4665 | immediate_quit = 1; | |
4666 | ||
561cb8e1 | 4667 | if (STRINGP (start)) |
570d7624 | 4668 | { |
ce51c54c KH |
4669 | failure = 0 > a_write (desc, start, 0, XSTRING (start)->size, |
4670 | &annotations, &coding); | |
570d7624 JB |
4671 | save_errno = errno; |
4672 | } | |
4673 | else if (XINT (start) != XINT (end)) | |
4674 | { | |
ec7adf26 RS |
4675 | tem = CHAR_TO_BYTE (XINT (start)); |
4676 | ||
570d7624 JB |
4677 | if (XINT (start) < GPT) |
4678 | { | |
ce51c54c KH |
4679 | failure = 0 > a_write (desc, Qnil, XINT (start), |
4680 | min (GPT, XINT (end)) - XINT (start), | |
4681 | &annotations, &coding); | |
570d7624 JB |
4682 | save_errno = errno; |
4683 | } | |
4684 | ||
4685 | if (XINT (end) > GPT && !failure) | |
4686 | { | |
ce51c54c KH |
4687 | tem = max (XINT (start), GPT); |
4688 | failure = 0 > a_write (desc, Qnil, tem , XINT (end) - tem, | |
4689 | &annotations, &coding); | |
d6a3cc15 RS |
4690 | save_errno = errno; |
4691 | } | |
69f6e679 RS |
4692 | } |
4693 | else | |
4694 | { | |
4695 | /* If file was empty, still need to write the annotations */ | |
c8a6d68a | 4696 | coding.mode |= CODING_MODE_LAST_BLOCK; |
ce51c54c | 4697 | failure = 0 > a_write (desc, Qnil, XINT (end), 0, &annotations, &coding); |
6fdaa9a0 KH |
4698 | save_errno = errno; |
4699 | } | |
4700 | ||
c8a6d68a KH |
4701 | if (CODING_REQUIRE_FLUSHING (&coding) |
4702 | && !(coding.mode & CODING_MODE_LAST_BLOCK) | |
1354debd | 4703 | && ! failure) |
6fdaa9a0 KH |
4704 | { |
4705 | /* We have to flush out a data. */ | |
c8a6d68a | 4706 | coding.mode |= CODING_MODE_LAST_BLOCK; |
ce51c54c | 4707 | failure = 0 > e_write (desc, Qnil, 0, 0, &coding); |
69f6e679 | 4708 | save_errno = errno; |
570d7624 JB |
4709 | } |
4710 | ||
4711 | immediate_quit = 0; | |
4712 | ||
6e23c83e | 4713 | #ifdef HAVE_FSYNC |
570d7624 JB |
4714 | /* Note fsync appears to change the modtime on BSD4.2 (both vax and sun). |
4715 | Disk full in NFS may be reported here. */ | |
1daffa1c RS |
4716 | /* mib says that closing the file will try to write as fast as NFS can do |
4717 | it, and that means the fsync here is not crucial for autosave files. */ | |
4718 | if (!auto_saving && fsync (desc) < 0) | |
cb33c142 KH |
4719 | { |
4720 | /* If fsync fails with EINTR, don't treat that as serious. */ | |
4721 | if (errno != EINTR) | |
4722 | failure = 1, save_errno = errno; | |
4723 | } | |
570d7624 JB |
4724 | #endif |
4725 | ||
199607e4 | 4726 | /* Spurious "file has changed on disk" warnings have been |
570d7624 JB |
4727 | observed on Suns as well. |
4728 | It seems that `close' can change the modtime, under nfs. | |
4729 | ||
4730 | (This has supposedly been fixed in Sunos 4, | |
4731 | but who knows about all the other machines with NFS?) */ | |
4732 | #if 0 | |
4733 | ||
4734 | /* On VMS and APOLLO, must do the stat after the close | |
4735 | since closing changes the modtime. */ | |
4736 | #ifndef VMS | |
4737 | #ifndef APOLLO | |
4738 | /* Recall that #if defined does not work on VMS. */ | |
4739 | #define FOO | |
4740 | fstat (desc, &st); | |
4741 | #endif | |
4742 | #endif | |
4743 | #endif | |
4744 | ||
4745 | /* NFS can report a write failure now. */ | |
68c45bf0 | 4746 | if (emacs_close (desc) < 0) |
570d7624 JB |
4747 | failure = 1, save_errno = errno; |
4748 | ||
4749 | #ifdef VMS | |
4750 | /* If we wrote to a temporary name and had no errors, rename to real name. */ | |
4751 | if (fname) | |
4752 | { | |
4753 | if (!failure) | |
4754 | failure = (rename (fn, fname) != 0), save_errno = errno; | |
4755 | fn = fname; | |
4756 | } | |
4757 | #endif /* VMS */ | |
4758 | ||
4759 | #ifndef FOO | |
4760 | stat (fn, &st); | |
4761 | #endif | |
6fc6f94b RS |
4762 | /* Discard the unwind protect for close_file_unwind. */ |
4763 | specpdl_ptr = specpdl + count1; | |
4764 | /* Restore the original current buffer. */ | |
98295b48 | 4765 | visit_file = unbind_to (count, visit_file); |
570d7624 JB |
4766 | |
4767 | #ifdef CLASH_DETECTION | |
4768 | if (!auto_saving) | |
7204a979 | 4769 | unlock_file (lockname); |
570d7624 JB |
4770 | #endif /* CLASH_DETECTION */ |
4771 | ||
4772 | /* Do this before reporting IO error | |
4773 | to avoid a "file has changed on disk" warning on | |
4774 | next attempt to save. */ | |
d6a3cc15 | 4775 | if (visiting) |
570d7624 JB |
4776 | current_buffer->modtime = st.st_mtime; |
4777 | ||
4778 | if (failure) | |
b1d1b865 | 4779 | error ("IO error writing %s: %s", XSTRING (filename)->data, |
68c45bf0 | 4780 | emacs_strerror (save_errno)); |
570d7624 | 4781 | |
d6a3cc15 | 4782 | if (visiting) |
570d7624 | 4783 | { |
95385625 | 4784 | SAVE_MODIFF = MODIFF; |
2acfd7ae | 4785 | XSETFASTINT (current_buffer->save_length, Z - BEG); |
3b7792ed | 4786 | current_buffer->filename = visit_file; |
f4226e89 | 4787 | update_mode_lines++; |
570d7624 | 4788 | } |
d6a3cc15 | 4789 | else if (quietly) |
570d7624 JB |
4790 | return Qnil; |
4791 | ||
4792 | if (!auto_saving) | |
60d67b83 | 4793 | message_with_string ("Wrote %s", visit_file, 1); |
570d7624 JB |
4794 | |
4795 | return Qnil; | |
4796 | } | |
ec7adf26 | 4797 | \f |
d6a3cc15 RS |
4798 | Lisp_Object merge (); |
4799 | ||
4800 | DEFUN ("car-less-than-car", Fcar_less_than_car, Scar_less_than_car, 2, 2, 0, | |
2ba0ccff | 4801 | "Return t if (car A) is numerically less than (car B).") |
d6a3cc15 RS |
4802 | (a, b) |
4803 | Lisp_Object a, b; | |
4804 | { | |
4805 | return Flss (Fcar (a), Fcar (b)); | |
4806 | } | |
4807 | ||
4808 | /* Build the complete list of annotations appropriate for writing out | |
4809 | the text between START and END, by calling all the functions in | |
6fc6f94b RS |
4810 | write-region-annotate-functions and merging the lists they return. |
4811 | If one of these functions switches to a different buffer, we assume | |
4812 | that buffer contains altered text. Therefore, the caller must | |
4813 | make sure to restore the current buffer in all cases, | |
4814 | as save-excursion would do. */ | |
d6a3cc15 RS |
4815 | |
4816 | static Lisp_Object | |
6fdaa9a0 KH |
4817 | build_annotations (start, end, pre_write_conversion) |
4818 | Lisp_Object start, end, pre_write_conversion; | |
d6a3cc15 RS |
4819 | { |
4820 | Lisp_Object annotations; | |
4821 | Lisp_Object p, res; | |
4822 | struct gcpro gcpro1, gcpro2; | |
0a20b684 RS |
4823 | Lisp_Object original_buffer; |
4824 | ||
4825 | XSETBUFFER (original_buffer, current_buffer); | |
d6a3cc15 RS |
4826 | |
4827 | annotations = Qnil; | |
4828 | p = Vwrite_region_annotate_functions; | |
4829 | GCPRO2 (annotations, p); | |
4830 | while (!NILP (p)) | |
4831 | { | |
6fc6f94b RS |
4832 | struct buffer *given_buffer = current_buffer; |
4833 | Vwrite_region_annotations_so_far = annotations; | |
d6a3cc15 | 4834 | res = call2 (Fcar (p), start, end); |
6fc6f94b RS |
4835 | /* If the function makes a different buffer current, |
4836 | assume that means this buffer contains altered text to be output. | |
4837 | Reset START and END from the buffer bounds | |
4838 | and discard all previous annotations because they should have | |
4839 | been dealt with by this function. */ | |
4840 | if (current_buffer != given_buffer) | |
4841 | { | |
3cf29f61 RS |
4842 | XSETFASTINT (start, BEGV); |
4843 | XSETFASTINT (end, ZV); | |
6fc6f94b RS |
4844 | annotations = Qnil; |
4845 | } | |
d6a3cc15 RS |
4846 | Flength (res); /* Check basic validity of return value */ |
4847 | annotations = merge (annotations, res, Qcar_less_than_car); | |
4848 | p = Fcdr (p); | |
4849 | } | |
0d420e88 BG |
4850 | |
4851 | /* Now do the same for annotation functions implied by the file-format */ | |
4852 | if (auto_saving && (!EQ (Vauto_save_file_format, Qt))) | |
4853 | p = Vauto_save_file_format; | |
4854 | else | |
4855 | p = current_buffer->file_format; | |
4856 | while (!NILP (p)) | |
4857 | { | |
4858 | struct buffer *given_buffer = current_buffer; | |
4859 | Vwrite_region_annotations_so_far = annotations; | |
0a20b684 RS |
4860 | res = call4 (Qformat_annotate_function, Fcar (p), start, end, |
4861 | original_buffer); | |
0d420e88 BG |
4862 | if (current_buffer != given_buffer) |
4863 | { | |
3cf29f61 RS |
4864 | XSETFASTINT (start, BEGV); |
4865 | XSETFASTINT (end, ZV); | |
0d420e88 BG |
4866 | annotations = Qnil; |
4867 | } | |
4868 | Flength (res); | |
4869 | annotations = merge (annotations, res, Qcar_less_than_car); | |
4870 | p = Fcdr (p); | |
4871 | } | |
6fdaa9a0 KH |
4872 | |
4873 | /* At last, do the same for the function PRE_WRITE_CONVERSION | |
4874 | implied by the current coding-system. */ | |
4875 | if (!NILP (pre_write_conversion)) | |
4876 | { | |
4877 | struct buffer *given_buffer = current_buffer; | |
4878 | Vwrite_region_annotations_so_far = annotations; | |
4879 | res = call2 (pre_write_conversion, start, end); | |
6fdaa9a0 | 4880 | Flength (res); |
cdfb0f1d KH |
4881 | annotations = (current_buffer != given_buffer |
4882 | ? res | |
4883 | : merge (annotations, res, Qcar_less_than_car)); | |
6fdaa9a0 KH |
4884 | } |
4885 | ||
d6a3cc15 RS |
4886 | UNGCPRO; |
4887 | return annotations; | |
4888 | } | |
ec7adf26 | 4889 | \f |
ce51c54c KH |
4890 | /* Write to descriptor DESC the NCHARS chars starting at POS of STRING. |
4891 | If STRING is nil, POS is the character position in the current buffer. | |
d6a3cc15 | 4892 | Intersperse with them the annotations from *ANNOT |
ce51c54c | 4893 | which fall within the range of POS to POS + NCHARS, |
d6a3cc15 RS |
4894 | each at its appropriate position. |
4895 | ||
ec7adf26 RS |
4896 | We modify *ANNOT by discarding elements as we use them up. |
4897 | ||
d6a3cc15 RS |
4898 | The return value is negative in case of system call failure. */ |
4899 | ||
ec7adf26 | 4900 | static int |
ce51c54c | 4901 | a_write (desc, string, pos, nchars, annot, coding) |
d6a3cc15 | 4902 | int desc; |
ce51c54c KH |
4903 | Lisp_Object string; |
4904 | register int nchars; | |
4905 | int pos; | |
d6a3cc15 | 4906 | Lisp_Object *annot; |
6fdaa9a0 | 4907 | struct coding_system *coding; |
d6a3cc15 RS |
4908 | { |
4909 | Lisp_Object tem; | |
4910 | int nextpos; | |
ce51c54c | 4911 | int lastpos = pos + nchars; |
d6a3cc15 | 4912 | |
eb15aa18 | 4913 | while (NILP (*annot) || CONSP (*annot)) |
d6a3cc15 RS |
4914 | { |
4915 | tem = Fcar_safe (Fcar (*annot)); | |
ce51c54c | 4916 | nextpos = pos - 1; |
ec7adf26 | 4917 | if (INTEGERP (tem)) |
ce51c54c | 4918 | nextpos = XFASTINT (tem); |
ec7adf26 RS |
4919 | |
4920 | /* If there are no more annotations in this range, | |
4921 | output the rest of the range all at once. */ | |
ce51c54c KH |
4922 | if (! (nextpos >= pos && nextpos <= lastpos)) |
4923 | return e_write (desc, string, pos, lastpos, coding); | |
ec7adf26 RS |
4924 | |
4925 | /* Output buffer text up to the next annotation's position. */ | |
ce51c54c | 4926 | if (nextpos > pos) |
d6a3cc15 | 4927 | { |
ce51c54c | 4928 | if (0 > e_write (desc, string, pos, nextpos, coding)); |
d6a3cc15 | 4929 | return -1; |
ce51c54c | 4930 | pos = nextpos; |
d6a3cc15 | 4931 | } |
ec7adf26 | 4932 | /* Output the annotation. */ |
d6a3cc15 RS |
4933 | tem = Fcdr (Fcar (*annot)); |
4934 | if (STRINGP (tem)) | |
4935 | { | |
ce51c54c | 4936 | if (0 > e_write (desc, tem, 0, XSTRING (tem)->size, coding)); |
d6a3cc15 RS |
4937 | return -1; |
4938 | } | |
4939 | *annot = Fcdr (*annot); | |
4940 | } | |
dfcf069d | 4941 | return 0; |
d6a3cc15 RS |
4942 | } |
4943 | ||
6fdaa9a0 KH |
4944 | #ifndef WRITE_BUF_SIZE |
4945 | #define WRITE_BUF_SIZE (16 * 1024) | |
4946 | #endif | |
4947 | ||
ce51c54c KH |
4948 | /* Write text in the range START and END into descriptor DESC, |
4949 | encoding them with coding system CODING. If STRING is nil, START | |
4950 | and END are character positions of the current buffer, else they | |
4951 | are indexes to the string STRING. */ | |
ec7adf26 RS |
4952 | |
4953 | static int | |
ce51c54c | 4954 | e_write (desc, string, start, end, coding) |
570d7624 | 4955 | int desc; |
ce51c54c KH |
4956 | Lisp_Object string; |
4957 | int start, end; | |
6fdaa9a0 | 4958 | struct coding_system *coding; |
570d7624 | 4959 | { |
ce51c54c KH |
4960 | register char *addr; |
4961 | register int nbytes; | |
6fdaa9a0 | 4962 | char buf[WRITE_BUF_SIZE]; |
ce51c54c KH |
4963 | int return_val = 0; |
4964 | ||
4965 | if (start >= end) | |
4966 | coding->composing = COMPOSITION_DISABLED; | |
4967 | if (coding->composing != COMPOSITION_DISABLED) | |
4968 | coding_save_composition (coding, start, end, string); | |
4969 | ||
4970 | if (STRINGP (string)) | |
4971 | { | |
4972 | addr = XSTRING (string)->data; | |
4973 | nbytes = STRING_BYTES (XSTRING (string)); | |
4974 | } | |
4975 | else if (start < end) | |
4976 | { | |
4977 | /* It is assured that the gap is not in the range START and END-1. */ | |
4978 | addr = CHAR_POS_ADDR (start); | |
4979 | nbytes = CHAR_TO_BYTE (end) - CHAR_TO_BYTE (start); | |
4980 | } | |
4981 | else | |
4982 | { | |
4983 | addr = ""; | |
4984 | nbytes = 0; | |
4985 | } | |
570d7624 | 4986 | |
6fdaa9a0 KH |
4987 | /* We used to have a code for handling selective display here. But, |
4988 | now it is handled within encode_coding. */ | |
4989 | while (1) | |
570d7624 | 4990 | { |
b4132433 KH |
4991 | int result; |
4992 | ||
4993 | result = encode_coding (coding, addr, buf, nbytes, WRITE_BUF_SIZE); | |
c8a6d68a | 4994 | if (coding->produced > 0) |
6fdaa9a0 | 4995 | { |
68c45bf0 | 4996 | coding->produced -= emacs_write (desc, buf, coding->produced); |
ce51c54c KH |
4997 | if (coding->produced) |
4998 | { | |
4999 | return_val = -1; | |
5000 | break; | |
5001 | } | |
570d7624 | 5002 | } |
ca91fb26 KH |
5003 | nbytes -= coding->consumed; |
5004 | addr += coding->consumed; | |
5005 | if (result == CODING_FINISH_INSUFFICIENT_SRC | |
5006 | && nbytes > 0) | |
b4132433 KH |
5007 | { |
5008 | /* The source text ends by an incomplete multibyte form. | |
5009 | There's no way other than write it out as is. */ | |
68c45bf0 | 5010 | nbytes -= emacs_write (desc, addr, nbytes); |
ce51c54c KH |
5011 | if (nbytes) |
5012 | { | |
5013 | return_val = -1; | |
5014 | break; | |
5015 | } | |
b4132433 | 5016 | } |
ec7adf26 | 5017 | if (nbytes <= 0) |
6fdaa9a0 | 5018 | break; |
ce51c54c KH |
5019 | start += coding->consumed_char; |
5020 | if (coding->cmp_data) | |
5021 | coding_adjust_composition_offset (coding, start); | |
570d7624 JB |
5022 | } |
5023 | return 0; | |
5024 | } | |
ec7adf26 | 5025 | \f |
570d7624 JB |
5026 | DEFUN ("verify-visited-file-modtime", Fverify_visited_file_modtime, |
5027 | Sverify_visited_file_modtime, 1, 1, 0, | |
5028 | "Return t if last mod time of BUF's visited file matches what BUF records.\n\ | |
5029 | This means that the file has not been changed since it was visited or saved.") | |
5030 | (buf) | |
5031 | Lisp_Object buf; | |
5032 | { | |
5033 | struct buffer *b; | |
5034 | struct stat st; | |
32f4334d | 5035 | Lisp_Object handler; |
b1d1b865 | 5036 | Lisp_Object filename; |
570d7624 JB |
5037 | |
5038 | CHECK_BUFFER (buf, 0); | |
5039 | b = XBUFFER (buf); | |
5040 | ||
93c30b5f | 5041 | if (!STRINGP (b->filename)) return Qt; |
570d7624 JB |
5042 | if (b->modtime == 0) return Qt; |
5043 | ||
32f4334d RS |
5044 | /* If the file name has special constructs in it, |
5045 | call the corresponding file handler. */ | |
49307295 KH |
5046 | handler = Ffind_file_name_handler (b->filename, |
5047 | Qverify_visited_file_modtime); | |
32f4334d | 5048 | if (!NILP (handler)) |
09121adc | 5049 | return call2 (handler, Qverify_visited_file_modtime, buf); |
32f4334d | 5050 | |
b1d1b865 RS |
5051 | filename = ENCODE_FILE (b->filename); |
5052 | ||
5053 | if (stat (XSTRING (filename)->data, &st) < 0) | |
570d7624 JB |
5054 | { |
5055 | /* If the file doesn't exist now and didn't exist before, | |
5056 | we say that it isn't modified, provided the error is a tame one. */ | |
5057 | if (errno == ENOENT || errno == EACCES || errno == ENOTDIR) | |
5058 | st.st_mtime = -1; | |
5059 | else | |
5060 | st.st_mtime = 0; | |
5061 | } | |
5062 | if (st.st_mtime == b->modtime | |
5063 | /* If both are positive, accept them if they are off by one second. */ | |
5064 | || (st.st_mtime > 0 && b->modtime > 0 | |
5065 | && (st.st_mtime == b->modtime + 1 | |
5066 | || st.st_mtime == b->modtime - 1))) | |
5067 | return Qt; | |
5068 | return Qnil; | |
5069 | } | |
5070 | ||
5071 | DEFUN ("clear-visited-file-modtime", Fclear_visited_file_modtime, | |
5072 | Sclear_visited_file_modtime, 0, 0, 0, | |
5073 | "Clear out records of last mod time of visited file.\n\ | |
5074 | Next attempt to save will certainly not complain of a discrepancy.") | |
5075 | () | |
5076 | { | |
5077 | current_buffer->modtime = 0; | |
5078 | return Qnil; | |
5079 | } | |
5080 | ||
f5d5eccf RS |
5081 | DEFUN ("visited-file-modtime", Fvisited_file_modtime, |
5082 | Svisited_file_modtime, 0, 0, 0, | |
5083 | "Return the current buffer's recorded visited file modification time.\n\ | |
5084 | The value is a list of the form (HIGH . LOW), like the time values\n\ | |
5085 | that `file-attributes' returns.") | |
5086 | () | |
5087 | { | |
b50536bb | 5088 | return long_to_cons ((unsigned long) current_buffer->modtime); |
f5d5eccf RS |
5089 | } |
5090 | ||
570d7624 | 5091 | DEFUN ("set-visited-file-modtime", Fset_visited_file_modtime, |
f5d5eccf | 5092 | Sset_visited_file_modtime, 0, 1, 0, |
570d7624 JB |
5093 | "Update buffer's recorded modification time from the visited file's time.\n\ |
5094 | Useful if the buffer was not read from the file normally\n\ | |
f5d5eccf RS |
5095 | or if the file itself has been changed for some known benign reason.\n\ |
5096 | An argument specifies the modification time value to use\n\ | |
5097 | \(instead of that of the visited file), in the form of a list\n\ | |
5098 | \(HIGH . LOW) or (HIGH LOW).") | |
5099 | (time_list) | |
5100 | Lisp_Object time_list; | |
570d7624 | 5101 | { |
f5d5eccf RS |
5102 | if (!NILP (time_list)) |
5103 | current_buffer->modtime = cons_to_long (time_list); | |
5104 | else | |
5105 | { | |
5106 | register Lisp_Object filename; | |
5107 | struct stat st; | |
5108 | Lisp_Object handler; | |
570d7624 | 5109 | |
f5d5eccf | 5110 | filename = Fexpand_file_name (current_buffer->filename, Qnil); |
32f4334d | 5111 | |
f5d5eccf RS |
5112 | /* If the file name has special constructs in it, |
5113 | call the corresponding file handler. */ | |
49307295 | 5114 | handler = Ffind_file_name_handler (filename, Qset_visited_file_modtime); |
f5d5eccf | 5115 | if (!NILP (handler)) |
caf3c431 | 5116 | /* The handler can find the file name the same way we did. */ |
76c881b0 | 5117 | return call2 (handler, Qset_visited_file_modtime, Qnil); |
b1d1b865 RS |
5118 | |
5119 | filename = ENCODE_FILE (filename); | |
5120 | ||
5121 | if (stat (XSTRING (filename)->data, &st) >= 0) | |
f5d5eccf RS |
5122 | current_buffer->modtime = st.st_mtime; |
5123 | } | |
570d7624 JB |
5124 | |
5125 | return Qnil; | |
5126 | } | |
5127 | \f | |
5128 | Lisp_Object | |
5129 | auto_save_error () | |
5130 | { | |
570d7624 | 5131 | ring_bell (); |
60d67b83 | 5132 | message_with_string ("Autosaving...error for %s", current_buffer->name, 1); |
de49a6d3 | 5133 | Fsleep_for (make_number (1), Qnil); |
60d67b83 | 5134 | message_with_string ("Autosaving...error for %s", current_buffer->name, 0); |
de49a6d3 | 5135 | Fsleep_for (make_number (1), Qnil); |
60d67b83 | 5136 | message_with_string ("Autosaving...error for %s", current_buffer->name, 0); |
de49a6d3 | 5137 | Fsleep_for (make_number (1), Qnil); |
570d7624 JB |
5138 | return Qnil; |
5139 | } | |
5140 | ||
5141 | Lisp_Object | |
5142 | auto_save_1 () | |
5143 | { | |
570d7624 JB |
5144 | struct stat st; |
5145 | ||
5146 | /* Get visited file's mode to become the auto save file's mode. */ | |
5147 | if (stat (XSTRING (current_buffer->filename)->data, &st) >= 0) | |
5148 | /* But make sure we can overwrite it later! */ | |
5149 | auto_save_mode_bits = st.st_mode | 0600; | |
5150 | else | |
5151 | auto_save_mode_bits = 0666; | |
5152 | ||
5153 | return | |
5154 | Fwrite_region (Qnil, Qnil, | |
5155 | current_buffer->auto_save_file_name, | |
de1d0127 | 5156 | Qnil, Qlambda, Qnil, Qnil); |
570d7624 JB |
5157 | } |
5158 | ||
e54d3b5d | 5159 | static Lisp_Object |
1b335d29 RS |
5160 | do_auto_save_unwind (stream) /* used as unwind-protect function */ |
5161 | Lisp_Object stream; | |
e54d3b5d | 5162 | { |
3be3c08e | 5163 | auto_saving = 0; |
1b335d29 | 5164 | if (!NILP (stream)) |
03699b14 KR |
5165 | fclose ((FILE *) (XFASTINT (XCAR (stream)) << 16 |
5166 | | XFASTINT (XCDR (stream)))); | |
e54d3b5d RS |
5167 | return Qnil; |
5168 | } | |
5169 | ||
a8c828be RS |
5170 | static Lisp_Object |
5171 | do_auto_save_unwind_1 (value) /* used as unwind-protect function */ | |
5172 | Lisp_Object value; | |
5173 | { | |
5174 | minibuffer_auto_raise = XINT (value); | |
5175 | return Qnil; | |
5176 | } | |
5177 | ||
570d7624 JB |
5178 | DEFUN ("do-auto-save", Fdo_auto_save, Sdo_auto_save, 0, 2, "", |
5179 | "Auto-save all buffers that need it.\n\ | |
5180 | This is all buffers that have auto-saving enabled\n\ | |
5181 | and are changed since last auto-saved.\n\ | |
5182 | Auto-saving writes the buffer into a file\n\ | |
5183 | so that your editing is not lost if the system crashes.\n\ | |
012d4cdc RS |
5184 | This file is not the file you visited; that changes only when you save.\n\ |
5185 | Normally we run the normal hook `auto-save-hook' before saving.\n\n\ | |
3b7f6e60 EN |
5186 | A non-nil NO-MESSAGE argument means do not print any message if successful.\n\ |
5187 | A non-nil CURRENT-ONLY argument means save only current buffer.") | |
17857782 JB |
5188 | (no_message, current_only) |
5189 | Lisp_Object no_message, current_only; | |
570d7624 JB |
5190 | { |
5191 | struct buffer *old = current_buffer, *b; | |
5192 | Lisp_Object tail, buf; | |
5193 | int auto_saved = 0; | |
f14b1c68 | 5194 | int do_handled_files; |
ff4c9993 | 5195 | Lisp_Object oquit; |
1b335d29 RS |
5196 | FILE *stream; |
5197 | Lisp_Object lispstream; | |
e54d3b5d | 5198 | int count = specpdl_ptr - specpdl; |
a8c828be | 5199 | int orig_minibuffer_auto_raise = minibuffer_auto_raise; |
c71106e5 | 5200 | int message_p = push_message (); |
9c856db9 | 5201 | |
ff4c9993 RS |
5202 | /* Ordinarily don't quit within this function, |
5203 | but don't make it impossible to quit (in case we get hung in I/O). */ | |
5204 | oquit = Vquit_flag; | |
5205 | Vquit_flag = Qnil; | |
570d7624 JB |
5206 | |
5207 | /* No GCPRO needed, because (when it matters) all Lisp_Object variables | |
5208 | point to non-strings reached from Vbuffer_alist. */ | |
5209 | ||
570d7624 | 5210 | if (minibuf_level) |
17857782 | 5211 | no_message = Qt; |
570d7624 | 5212 | |
265a9e55 | 5213 | if (!NILP (Vrun_hooks)) |
570d7624 JB |
5214 | call1 (Vrun_hooks, intern ("auto-save-hook")); |
5215 | ||
e54d3b5d RS |
5216 | if (STRINGP (Vauto_save_list_file_name)) |
5217 | { | |
258fd2cb RS |
5218 | Lisp_Object listfile; |
5219 | listfile = Fexpand_file_name (Vauto_save_list_file_name, Qnil); | |
1b335d29 | 5220 | stream = fopen (XSTRING (listfile)->data, "w"); |
0eff1f85 RS |
5221 | if (stream != NULL) |
5222 | { | |
5223 | /* Arrange to close that file whether or not we get an error. | |
5224 | Also reset auto_saving to 0. */ | |
5225 | lispstream = Fcons (Qnil, Qnil); | |
03699b14 KR |
5226 | XSETFASTINT (XCAR (lispstream), (EMACS_UINT)stream >> 16); |
5227 | XSETFASTINT (XCDR (lispstream), (EMACS_UINT)stream & 0xffff); | |
0eff1f85 RS |
5228 | } |
5229 | else | |
5230 | lispstream = Qnil; | |
e54d3b5d RS |
5231 | } |
5232 | else | |
1b335d29 RS |
5233 | { |
5234 | stream = NULL; | |
5235 | lispstream = Qnil; | |
5236 | } | |
199607e4 | 5237 | |
1b335d29 | 5238 | record_unwind_protect (do_auto_save_unwind, lispstream); |
a8c828be RS |
5239 | record_unwind_protect (do_auto_save_unwind_1, |
5240 | make_number (minibuffer_auto_raise)); | |
5241 | minibuffer_auto_raise = 0; | |
3be3c08e RS |
5242 | auto_saving = 1; |
5243 | ||
f14b1c68 JB |
5244 | /* First, save all files which don't have handlers. If Emacs is |
5245 | crashing, the handlers may tweak what is causing Emacs to crash | |
5246 | in the first place, and it would be a shame if Emacs failed to | |
5247 | autosave perfectly ordinary files because it couldn't handle some | |
5248 | ange-ftp'd file. */ | |
5249 | for (do_handled_files = 0; do_handled_files < 2; do_handled_files++) | |
03699b14 | 5250 | for (tail = Vbuffer_alist; GC_CONSP (tail); tail = XCDR (tail)) |
f14b1c68 | 5251 | { |
03699b14 | 5252 | buf = XCDR (XCAR (tail)); |
f14b1c68 | 5253 | b = XBUFFER (buf); |
199607e4 | 5254 | |
e54d3b5d | 5255 | /* Record all the buffers that have auto save mode |
258fd2cb RS |
5256 | in the special file that lists them. For each of these buffers, |
5257 | Record visited name (if any) and auto save name. */ | |
93c30b5f | 5258 | if (STRINGP (b->auto_save_file_name) |
1b335d29 | 5259 | && stream != NULL && do_handled_files == 0) |
e54d3b5d | 5260 | { |
258fd2cb RS |
5261 | if (!NILP (b->filename)) |
5262 | { | |
1b335d29 | 5263 | fwrite (XSTRING (b->filename)->data, 1, |
fc932ac6 | 5264 | STRING_BYTES (XSTRING (b->filename)), stream); |
258fd2cb | 5265 | } |
1b335d29 RS |
5266 | putc ('\n', stream); |
5267 | fwrite (XSTRING (b->auto_save_file_name)->data, 1, | |
fc932ac6 | 5268 | STRING_BYTES (XSTRING (b->auto_save_file_name)), stream); |
1b335d29 | 5269 | putc ('\n', stream); |
e54d3b5d | 5270 | } |
17857782 | 5271 | |
f14b1c68 JB |
5272 | if (!NILP (current_only) |
5273 | && b != current_buffer) | |
5274 | continue; | |
e54d3b5d | 5275 | |
95385625 RS |
5276 | /* Don't auto-save indirect buffers. |
5277 | The base buffer takes care of it. */ | |
5278 | if (b->base_buffer) | |
5279 | continue; | |
5280 | ||
f14b1c68 JB |
5281 | /* Check for auto save enabled |
5282 | and file changed since last auto save | |
5283 | and file changed since last real save. */ | |
93c30b5f | 5284 | if (STRINGP (b->auto_save_file_name) |
95385625 | 5285 | && BUF_SAVE_MODIFF (b) < BUF_MODIFF (b) |
f14b1c68 | 5286 | && b->auto_save_modified < BUF_MODIFF (b) |
82c2d839 RS |
5287 | /* -1 means we've turned off autosaving for a while--see below. */ |
5288 | && XINT (b->save_length) >= 0 | |
f14b1c68 | 5289 | && (do_handled_files |
49307295 KH |
5290 | || NILP (Ffind_file_name_handler (b->auto_save_file_name, |
5291 | Qwrite_region)))) | |
f14b1c68 | 5292 | { |
b60247d9 RS |
5293 | EMACS_TIME before_time, after_time; |
5294 | ||
5295 | EMACS_GET_TIME (before_time); | |
5296 | ||
5297 | /* If we had a failure, don't try again for 20 minutes. */ | |
5298 | if (b->auto_save_failure_time >= 0 | |
5299 | && EMACS_SECS (before_time) - b->auto_save_failure_time < 1200) | |
5300 | continue; | |
5301 | ||
f14b1c68 JB |
5302 | if ((XFASTINT (b->save_length) * 10 |
5303 | > (BUF_Z (b) - BUF_BEG (b)) * 13) | |
5304 | /* A short file is likely to change a large fraction; | |
5305 | spare the user annoying messages. */ | |
5306 | && XFASTINT (b->save_length) > 5000 | |
5307 | /* These messages are frequent and annoying for `*mail*'. */ | |
5308 | && !EQ (b->filename, Qnil) | |
5309 | && NILP (no_message)) | |
5310 | { | |
5311 | /* It has shrunk too much; turn off auto-saving here. */ | |
a8c828be | 5312 | minibuffer_auto_raise = orig_minibuffer_auto_raise; |
60d67b83 RS |
5313 | message_with_string ("Buffer %s has shrunk a lot; auto save turned off there", |
5314 | b->name, 1); | |
a8c828be | 5315 | minibuffer_auto_raise = 0; |
82c2d839 RS |
5316 | /* Turn off auto-saving until there's a real save, |
5317 | and prevent any more warnings. */ | |
46283abe | 5318 | XSETINT (b->save_length, -1); |
f14b1c68 JB |
5319 | Fsleep_for (make_number (1), Qnil); |
5320 | continue; | |
5321 | } | |
5322 | set_buffer_internal (b); | |
5323 | if (!auto_saved && NILP (no_message)) | |
5324 | message1 ("Auto-saving..."); | |
5325 | internal_condition_case (auto_save_1, Qt, auto_save_error); | |
5326 | auto_saved++; | |
5327 | b->auto_save_modified = BUF_MODIFF (b); | |
2acfd7ae | 5328 | XSETFASTINT (current_buffer->save_length, Z - BEG); |
f14b1c68 | 5329 | set_buffer_internal (old); |
b60247d9 RS |
5330 | |
5331 | EMACS_GET_TIME (after_time); | |
5332 | ||
5333 | /* If auto-save took more than 60 seconds, | |
5334 | assume it was an NFS failure that got a timeout. */ | |
5335 | if (EMACS_SECS (after_time) - EMACS_SECS (before_time) > 60) | |
5336 | b->auto_save_failure_time = EMACS_SECS (after_time); | |
f14b1c68 JB |
5337 | } |
5338 | } | |
570d7624 | 5339 | |
b67f2ca5 RS |
5340 | /* Prevent another auto save till enough input events come in. */ |
5341 | record_auto_save (); | |
570d7624 | 5342 | |
17857782 | 5343 | if (auto_saved && NILP (no_message)) |
f05b275b | 5344 | { |
c71106e5 | 5345 | if (message_p) |
31f3d831 | 5346 | { |
22e59fa7 | 5347 | sit_for (1, 0, 0, 0, 0); |
c71106e5 | 5348 | restore_message (); |
31f3d831 | 5349 | } |
f05b275b KH |
5350 | else |
5351 | message1 ("Auto-saving...done"); | |
5352 | } | |
570d7624 | 5353 | |
ff4c9993 RS |
5354 | Vquit_flag = oquit; |
5355 | ||
c71106e5 | 5356 | pop_message (); |
e54d3b5d | 5357 | unbind_to (count, Qnil); |
570d7624 JB |
5358 | return Qnil; |
5359 | } | |
5360 | ||
5361 | DEFUN ("set-buffer-auto-saved", Fset_buffer_auto_saved, | |
5362 | Sset_buffer_auto_saved, 0, 0, 0, | |
5363 | "Mark current buffer as auto-saved with its current text.\n\ | |
5364 | No auto-save file will be written until the buffer changes again.") | |
5365 | () | |
5366 | { | |
5367 | current_buffer->auto_save_modified = MODIFF; | |
2acfd7ae | 5368 | XSETFASTINT (current_buffer->save_length, Z - BEG); |
b60247d9 RS |
5369 | current_buffer->auto_save_failure_time = -1; |
5370 | return Qnil; | |
5371 | } | |
5372 | ||
5373 | DEFUN ("clear-buffer-auto-save-failure", Fclear_buffer_auto_save_failure, | |
5374 | Sclear_buffer_auto_save_failure, 0, 0, 0, | |
5375 | "Clear any record of a recent auto-save failure in the current buffer.") | |
5376 | () | |
5377 | { | |
5378 | current_buffer->auto_save_failure_time = -1; | |
570d7624 JB |
5379 | return Qnil; |
5380 | } | |
5381 | ||
5382 | DEFUN ("recent-auto-save-p", Frecent_auto_save_p, Srecent_auto_save_p, | |
5383 | 0, 0, 0, | |
5384 | "Return t if buffer has been auto-saved since last read in or saved.") | |
5385 | () | |
5386 | { | |
95385625 | 5387 | return (SAVE_MODIFF < current_buffer->auto_save_modified) ? Qt : Qnil; |
570d7624 JB |
5388 | } |
5389 | \f | |
5390 | /* Reading and completing file names */ | |
5391 | extern Lisp_Object Ffile_name_completion (), Ffile_name_all_completions (); | |
5392 | ||
6e710ae5 RS |
5393 | /* In the string VAL, change each $ to $$ and return the result. */ |
5394 | ||
5395 | static Lisp_Object | |
5396 | double_dollars (val) | |
5397 | Lisp_Object val; | |
5398 | { | |
5399 | register unsigned char *old, *new; | |
5400 | register int n; | |
5401 | int osize, count; | |
5402 | ||
fc932ac6 | 5403 | osize = STRING_BYTES (XSTRING (val)); |
60d67b83 RS |
5404 | |
5405 | /* Count the number of $ characters. */ | |
6e710ae5 RS |
5406 | for (n = osize, count = 0, old = XSTRING (val)->data; n > 0; n--) |
5407 | if (*old++ == '$') count++; | |
5408 | if (count > 0) | |
5409 | { | |
5410 | old = XSTRING (val)->data; | |
60d67b83 RS |
5411 | val = make_uninit_multibyte_string (XSTRING (val)->size + count, |
5412 | osize + count); | |
6e710ae5 RS |
5413 | new = XSTRING (val)->data; |
5414 | for (n = osize; n > 0; n--) | |
5415 | if (*old != '$') | |
5416 | *new++ = *old++; | |
5417 | else | |
5418 | { | |
5419 | *new++ = '$'; | |
5420 | *new++ = '$'; | |
5421 | old++; | |
5422 | } | |
5423 | } | |
5424 | return val; | |
5425 | } | |
5426 | ||
570d7624 JB |
5427 | DEFUN ("read-file-name-internal", Fread_file_name_internal, Sread_file_name_internal, |
5428 | 3, 3, 0, | |
5429 | "Internal subroutine for read-file-name. Do not call this.") | |
5430 | (string, dir, action) | |
5431 | Lisp_Object string, dir, action; | |
5432 | /* action is nil for complete, t for return list of completions, | |
5433 | lambda for verify final value */ | |
5434 | { | |
5435 | Lisp_Object name, specdir, realdir, val, orig_string; | |
09121adc | 5436 | int changed; |
8ce069f5 | 5437 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4, gcpro5; |
09121adc | 5438 | |
58cc3710 RS |
5439 | CHECK_STRING (string, 0); |
5440 | ||
09121adc RS |
5441 | realdir = dir; |
5442 | name = string; | |
5443 | orig_string = Qnil; | |
5444 | specdir = Qnil; | |
5445 | changed = 0; | |
5446 | /* No need to protect ACTION--we only compare it with t and nil. */ | |
8ce069f5 | 5447 | GCPRO5 (string, realdir, name, specdir, orig_string); |
570d7624 JB |
5448 | |
5449 | if (XSTRING (string)->size == 0) | |
5450 | { | |
570d7624 | 5451 | if (EQ (action, Qlambda)) |
09121adc RS |
5452 | { |
5453 | UNGCPRO; | |
5454 | return Qnil; | |
5455 | } | |
570d7624 JB |
5456 | } |
5457 | else | |
5458 | { | |
5459 | orig_string = string; | |
5460 | string = Fsubstitute_in_file_name (string); | |
09121adc | 5461 | changed = NILP (Fstring_equal (string, orig_string)); |
570d7624 | 5462 | name = Ffile_name_nondirectory (string); |
09121adc RS |
5463 | val = Ffile_name_directory (string); |
5464 | if (! NILP (val)) | |
5465 | realdir = Fexpand_file_name (val, realdir); | |
570d7624 JB |
5466 | } |
5467 | ||
265a9e55 | 5468 | if (NILP (action)) |
570d7624 JB |
5469 | { |
5470 | specdir = Ffile_name_directory (string); | |
5471 | val = Ffile_name_completion (name, realdir); | |
09121adc | 5472 | UNGCPRO; |
93c30b5f | 5473 | if (!STRINGP (val)) |
570d7624 | 5474 | { |
09121adc | 5475 | if (changed) |
dbd04e01 | 5476 | return double_dollars (string); |
09121adc | 5477 | return val; |
570d7624 JB |
5478 | } |
5479 | ||
265a9e55 | 5480 | if (!NILP (specdir)) |
570d7624 JB |
5481 | val = concat2 (specdir, val); |
5482 | #ifndef VMS | |
6e710ae5 RS |
5483 | return double_dollars (val); |
5484 | #else /* not VMS */ | |
09121adc | 5485 | return val; |
6e710ae5 | 5486 | #endif /* not VMS */ |
570d7624 | 5487 | } |
09121adc | 5488 | UNGCPRO; |
570d7624 JB |
5489 | |
5490 | if (EQ (action, Qt)) | |
5491 | return Ffile_name_all_completions (name, realdir); | |
5492 | /* Only other case actually used is ACTION = lambda */ | |
5493 | #ifdef VMS | |
5494 | /* Supposedly this helps commands such as `cd' that read directory names, | |
5495 | but can someone explain how it helps them? -- RMS */ | |
5496 | if (XSTRING (name)->size == 0) | |
5497 | return Qt; | |
5498 | #endif /* VMS */ | |
5499 | return Ffile_exists_p (string); | |
5500 | } | |
5501 | ||
5502 | DEFUN ("read-file-name", Fread_file_name, Sread_file_name, 1, 5, 0, | |
5503 | "Read file name, prompting with PROMPT and completing in directory DIR.\n\ | |
5504 | Value is not expanded---you must call `expand-file-name' yourself.\n\ | |
3b7f6e60 EN |
5505 | Default name to DEFAULT-FILENAME if user enters a null string.\n\ |
5506 | (If DEFAULT-FILENAME is omitted, the visited file name is used,\n\ | |
3beeedfe | 5507 | except that if INITIAL is specified, that combined with DIR is used.)\n\ |
570d7624 JB |
5508 | Fourth arg MUSTMATCH non-nil means require existing file's name.\n\ |
5509 | Non-nil and non-t means also require confirmation after completion.\n\ | |
5510 | Fifth arg INITIAL specifies text to start with.\n\ | |
5511 | DIR defaults to current buffer's directory default.") | |
3b7f6e60 EN |
5512 | (prompt, dir, default_filename, mustmatch, initial) |
5513 | Lisp_Object prompt, dir, default_filename, mustmatch, initial; | |
570d7624 | 5514 | { |
8d6d9fef | 5515 | Lisp_Object val, insdef, tem; |
570d7624 JB |
5516 | struct gcpro gcpro1, gcpro2; |
5517 | register char *homedir; | |
62f555a5 RS |
5518 | int replace_in_history = 0; |
5519 | int add_to_history = 0; | |
570d7624 JB |
5520 | int count; |
5521 | ||
265a9e55 | 5522 | if (NILP (dir)) |
570d7624 | 5523 | dir = current_buffer->directory; |
3b7f6e60 | 5524 | if (NILP (default_filename)) |
3beeedfe RS |
5525 | { |
5526 | if (! NILP (initial)) | |
3b7f6e60 | 5527 | default_filename = Fexpand_file_name (initial, dir); |
3beeedfe | 5528 | else |
3b7f6e60 | 5529 | default_filename = current_buffer->filename; |
3beeedfe | 5530 | } |
570d7624 JB |
5531 | |
5532 | /* If dir starts with user's homedir, change that to ~. */ | |
5533 | homedir = (char *) egetenv ("HOME"); | |
199607e4 RS |
5534 | #ifdef DOS_NT |
5535 | homedir = strcpy (alloca (strlen (homedir) + 1), homedir); | |
5536 | CORRECT_DIR_SEPS (homedir); | |
5537 | #endif | |
570d7624 | 5538 | if (homedir != 0 |
93c30b5f | 5539 | && STRINGP (dir) |
570d7624 | 5540 | && !strncmp (homedir, XSTRING (dir)->data, strlen (homedir)) |
5e570b75 | 5541 | && IS_DIRECTORY_SEP (XSTRING (dir)->data[strlen (homedir)])) |
570d7624 JB |
5542 | { |
5543 | dir = make_string (XSTRING (dir)->data + strlen (homedir) - 1, | |
fc932ac6 | 5544 | STRING_BYTES (XSTRING (dir)) - strlen (homedir) + 1); |
570d7624 JB |
5545 | XSTRING (dir)->data[0] = '~'; |
5546 | } | |
8d6d9fef AS |
5547 | /* Likewise for default_filename. */ |
5548 | if (homedir != 0 | |
5549 | && STRINGP (default_filename) | |
5550 | && !strncmp (homedir, XSTRING (default_filename)->data, strlen (homedir)) | |
5551 | && IS_DIRECTORY_SEP (XSTRING (default_filename)->data[strlen (homedir)])) | |
5552 | { | |
5553 | default_filename | |
5554 | = make_string (XSTRING (default_filename)->data + strlen (homedir) - 1, | |
5555 | STRING_BYTES (XSTRING (default_filename)) - strlen (homedir) + 1); | |
5556 | XSTRING (default_filename)->data[0] = '~'; | |
5557 | } | |
5558 | if (!NILP (default_filename)) | |
b537a6c7 RS |
5559 | { |
5560 | CHECK_STRING (default_filename, 3); | |
5561 | default_filename = double_dollars (default_filename); | |
5562 | } | |
570d7624 | 5563 | |
58cc3710 | 5564 | if (insert_default_directory && STRINGP (dir)) |
570d7624 JB |
5565 | { |
5566 | insdef = dir; | |
265a9e55 | 5567 | if (!NILP (initial)) |
570d7624 | 5568 | { |
15c65264 | 5569 | Lisp_Object args[2], pos; |
570d7624 JB |
5570 | |
5571 | args[0] = insdef; | |
5572 | args[1] = initial; | |
5573 | insdef = Fconcat (2, args); | |
351bd676 | 5574 | pos = make_number (XSTRING (double_dollars (dir))->size); |
8d6d9fef | 5575 | insdef = Fcons (double_dollars (insdef), pos); |
570d7624 | 5576 | } |
6e710ae5 | 5577 | else |
8d6d9fef | 5578 | insdef = double_dollars (insdef); |
570d7624 | 5579 | } |
58cc3710 | 5580 | else if (STRINGP (initial)) |
8d6d9fef | 5581 | insdef = Fcons (double_dollars (initial), make_number (0)); |
570d7624 | 5582 | else |
8d6d9fef | 5583 | insdef = Qnil; |
570d7624 | 5584 | |
570d7624 | 5585 | count = specpdl_ptr - specpdl; |
a79485af | 5586 | #ifdef VMS |
570d7624 JB |
5587 | specbind (intern ("completion-ignore-case"), Qt); |
5588 | #endif | |
5589 | ||
a79485af RS |
5590 | specbind (intern ("minibuffer-completing-file-name"), Qt); |
5591 | ||
3b7f6e60 | 5592 | GCPRO2 (insdef, default_filename); |
9c856db9 GM |
5593 | |
5594 | #ifdef USE_MOTIF | |
5595 | if ((NILP (last_nonmenu_event) || CONSP (last_nonmenu_event)) | |
5596 | && use_dialog_box | |
5597 | && have_menus_p ()) | |
5598 | { | |
9172b88d GM |
5599 | /* If DIR contains a file name, split it. */ |
5600 | Lisp_Object file; | |
5601 | file = Ffile_name_nondirectory (dir); | |
5602 | if (XSTRING (file)->size && NILP (default_filename)) | |
5603 | { | |
5604 | default_filename = file; | |
5605 | dir = Ffile_name_directory (dir); | |
5606 | } | |
5607 | default_filename = Fexpand_file_name (default_filename, dir); | |
9c856db9 GM |
5608 | val = Fx_file_dialog (prompt, dir, default_filename, mustmatch); |
5609 | add_to_history = 1; | |
5610 | } | |
5611 | else | |
5612 | #endif | |
5613 | val = Fcompleting_read (prompt, intern ("read-file-name-internal"), | |
5614 | dir, mustmatch, insdef, | |
5615 | Qfile_name_history, default_filename, Qnil); | |
62f555a5 RS |
5616 | |
5617 | tem = Fsymbol_value (Qfile_name_history); | |
03699b14 | 5618 | if (CONSP (tem) && EQ (XCAR (tem), val)) |
62f555a5 RS |
5619 | replace_in_history = 1; |
5620 | ||
5621 | /* If Fcompleting_read returned the inserted default string itself | |
a8c828be RS |
5622 | (rather than a new string with the same contents), |
5623 | it has to mean that the user typed RET with the minibuffer empty. | |
5624 | In that case, we really want to return "" | |
5625 | so that commands such as set-visited-file-name can distinguish. */ | |
5626 | if (EQ (val, default_filename)) | |
62f555a5 RS |
5627 | { |
5628 | /* In this case, Fcompleting_read has not added an element | |
5629 | to the history. Maybe we should. */ | |
5630 | if (! replace_in_history) | |
5631 | add_to_history = 1; | |
5632 | ||
5633 | val = build_string (""); | |
5634 | } | |
570d7624 | 5635 | |
570d7624 | 5636 | unbind_to (count, Qnil); |
570d7624 | 5637 | UNGCPRO; |
265a9e55 | 5638 | if (NILP (val)) |
570d7624 | 5639 | error ("No file name specified"); |
62f555a5 | 5640 | |
8d6d9fef | 5641 | tem = Fstring_equal (val, CONSP (insdef) ? XCAR (insdef) : insdef); |
62f555a5 | 5642 | |
3b7f6e60 | 5643 | if (!NILP (tem) && !NILP (default_filename)) |
62f555a5 RS |
5644 | val = default_filename; |
5645 | else if (XSTRING (val)->size == 0 && NILP (insdef)) | |
d9bc1c99 | 5646 | { |
3b7f6e60 | 5647 | if (!NILP (default_filename)) |
62f555a5 | 5648 | val = default_filename; |
d9bc1c99 RS |
5649 | else |
5650 | error ("No default file name"); | |
5651 | } | |
62f555a5 | 5652 | val = Fsubstitute_in_file_name (val); |
570d7624 | 5653 | |
62f555a5 RS |
5654 | if (replace_in_history) |
5655 | /* Replace what Fcompleting_read added to the history | |
5656 | with what we will actually return. */ | |
03699b14 | 5657 | XCAR (Fsymbol_value (Qfile_name_history)) = double_dollars (val); |
62f555a5 | 5658 | else if (add_to_history) |
570d7624 | 5659 | { |
62f555a5 RS |
5660 | /* Add the value to the history--but not if it matches |
5661 | the last value already there. */ | |
8d6d9fef | 5662 | Lisp_Object val1 = double_dollars (val); |
62f555a5 | 5663 | tem = Fsymbol_value (Qfile_name_history); |
03699b14 | 5664 | if (! CONSP (tem) || NILP (Fequal (XCAR (tem), val1))) |
62f555a5 | 5665 | Fset (Qfile_name_history, |
8d6d9fef | 5666 | Fcons (val1, tem)); |
570d7624 | 5667 | } |
9c856db9 | 5668 | |
62f555a5 | 5669 | return val; |
570d7624 | 5670 | } |
9c856db9 | 5671 | |
570d7624 | 5672 | \f |
dbda5089 GV |
5673 | void |
5674 | init_fileio_once () | |
5675 | { | |
5676 | /* Must be set before any path manipulation is performed. */ | |
5677 | XSETFASTINT (Vdirectory_sep_char, '/'); | |
5678 | } | |
5679 | ||
9c856db9 | 5680 | \f |
dfcf069d | 5681 | void |
570d7624 JB |
5682 | syms_of_fileio () |
5683 | { | |
0bf2eed2 | 5684 | Qexpand_file_name = intern ("expand-file-name"); |
273e0829 | 5685 | Qsubstitute_in_file_name = intern ("substitute-in-file-name"); |
0bf2eed2 RS |
5686 | Qdirectory_file_name = intern ("directory-file-name"); |
5687 | Qfile_name_directory = intern ("file-name-directory"); | |
5688 | Qfile_name_nondirectory = intern ("file-name-nondirectory"); | |
642ef245 | 5689 | Qunhandled_file_name_directory = intern ("unhandled-file-name-directory"); |
0bf2eed2 | 5690 | Qfile_name_as_directory = intern ("file-name-as-directory"); |
32f4334d | 5691 | Qcopy_file = intern ("copy-file"); |
a6e6e718 | 5692 | Qmake_directory_internal = intern ("make-directory-internal"); |
32f4334d RS |
5693 | Qdelete_directory = intern ("delete-directory"); |
5694 | Qdelete_file = intern ("delete-file"); | |
5695 | Qrename_file = intern ("rename-file"); | |
5696 | Qadd_name_to_file = intern ("add-name-to-file"); | |
5697 | Qmake_symbolic_link = intern ("make-symbolic-link"); | |
5698 | Qfile_exists_p = intern ("file-exists-p"); | |
5699 | Qfile_executable_p = intern ("file-executable-p"); | |
5700 | Qfile_readable_p = intern ("file-readable-p"); | |
32f4334d | 5701 | Qfile_writable_p = intern ("file-writable-p"); |
1f8653eb RS |
5702 | Qfile_symlink_p = intern ("file-symlink-p"); |
5703 | Qaccess_file = intern ("access-file"); | |
32f4334d | 5704 | Qfile_directory_p = intern ("file-directory-p"); |
adedc71d | 5705 | Qfile_regular_p = intern ("file-regular-p"); |
32f4334d RS |
5706 | Qfile_accessible_directory_p = intern ("file-accessible-directory-p"); |
5707 | Qfile_modes = intern ("file-modes"); | |
5708 | Qset_file_modes = intern ("set-file-modes"); | |
5709 | Qfile_newer_than_file_p = intern ("file-newer-than-file-p"); | |
5710 | Qinsert_file_contents = intern ("insert-file-contents"); | |
5711 | Qwrite_region = intern ("write-region"); | |
5712 | Qverify_visited_file_modtime = intern ("verify-visited-file-modtime"); | |
3ec46acd | 5713 | Qset_visited_file_modtime = intern ("set-visited-file-modtime"); |
32f4334d | 5714 | |
642ef245 | 5715 | staticpro (&Qexpand_file_name); |
273e0829 | 5716 | staticpro (&Qsubstitute_in_file_name); |
642ef245 JB |
5717 | staticpro (&Qdirectory_file_name); |
5718 | staticpro (&Qfile_name_directory); | |
5719 | staticpro (&Qfile_name_nondirectory); | |
5720 | staticpro (&Qunhandled_file_name_directory); | |
5721 | staticpro (&Qfile_name_as_directory); | |
15c65264 | 5722 | staticpro (&Qcopy_file); |
c34b559d | 5723 | staticpro (&Qmake_directory_internal); |
15c65264 RS |
5724 | staticpro (&Qdelete_directory); |
5725 | staticpro (&Qdelete_file); | |
5726 | staticpro (&Qrename_file); | |
5727 | staticpro (&Qadd_name_to_file); | |
5728 | staticpro (&Qmake_symbolic_link); | |
5729 | staticpro (&Qfile_exists_p); | |
5730 | staticpro (&Qfile_executable_p); | |
5731 | staticpro (&Qfile_readable_p); | |
15c65264 | 5732 | staticpro (&Qfile_writable_p); |
1f8653eb RS |
5733 | staticpro (&Qaccess_file); |
5734 | staticpro (&Qfile_symlink_p); | |
15c65264 | 5735 | staticpro (&Qfile_directory_p); |
adedc71d | 5736 | staticpro (&Qfile_regular_p); |
15c65264 RS |
5737 | staticpro (&Qfile_accessible_directory_p); |
5738 | staticpro (&Qfile_modes); | |
5739 | staticpro (&Qset_file_modes); | |
5740 | staticpro (&Qfile_newer_than_file_p); | |
5741 | staticpro (&Qinsert_file_contents); | |
5742 | staticpro (&Qwrite_region); | |
5743 | staticpro (&Qverify_visited_file_modtime); | |
0a61794b | 5744 | staticpro (&Qset_visited_file_modtime); |
642ef245 JB |
5745 | |
5746 | Qfile_name_history = intern ("file-name-history"); | |
5747 | Fset (Qfile_name_history, Qnil); | |
15c65264 RS |
5748 | staticpro (&Qfile_name_history); |
5749 | ||
570d7624 JB |
5750 | Qfile_error = intern ("file-error"); |
5751 | staticpro (&Qfile_error); | |
199607e4 | 5752 | Qfile_already_exists = intern ("file-already-exists"); |
570d7624 | 5753 | staticpro (&Qfile_already_exists); |
c0b7b21c RS |
5754 | Qfile_date_error = intern ("file-date-error"); |
5755 | staticpro (&Qfile_date_error); | |
505ab9bc RS |
5756 | Qexcl = intern ("excl"); |
5757 | staticpro (&Qexcl); | |
570d7624 | 5758 | |
5e570b75 | 5759 | #ifdef DOS_NT |
4c3c22f3 RS |
5760 | Qfind_buffer_file_type = intern ("find-buffer-file-type"); |
5761 | staticpro (&Qfind_buffer_file_type); | |
5e570b75 | 5762 | #endif /* DOS_NT */ |
4c3c22f3 | 5763 | |
b1d1b865 | 5764 | DEFVAR_LISP ("file-name-coding-system", &Vfile_name_coding_system, |
cd913586 KH |
5765 | "*Coding system for encoding file names.\n\ |
5766 | If it is nil, default-file-name-coding-system (which see) is used."); | |
b1d1b865 RS |
5767 | Vfile_name_coding_system = Qnil; |
5768 | ||
cd913586 KH |
5769 | DEFVAR_LISP ("default-file-name-coding-system", |
5770 | &Vdefault_file_name_coding_system, | |
5771 | "Default coding system for encoding file names.\n\ | |
5772 | This variable is used only when file-name-coding-system is nil.\n\ | |
5773 | \n\ | |
5774 | This variable is set/changed by the command set-language-environment.\n\ | |
5775 | User should not set this variable manually,\n\ | |
5776 | instead use file-name-coding-system to get a constant encoding\n\ | |
5777 | of file names regardless of the current language environment."); | |
5778 | Vdefault_file_name_coding_system = Qnil; | |
5779 | ||
0d420e88 | 5780 | DEFVAR_LISP ("auto-save-file-format", &Vauto_save_file_format, |
824a483f | 5781 | "*Format in which to write auto-save files.\n\ |
0d420e88 BG |
5782 | Should be a list of symbols naming formats that are defined in `format-alist'.\n\ |
5783 | If it is t, which is the default, auto-save files are written in the\n\ | |
5784 | same format as a regular save would use."); | |
5785 | Vauto_save_file_format = Qt; | |
5786 | ||
5787 | Qformat_decode = intern ("format-decode"); | |
5788 | staticpro (&Qformat_decode); | |
5789 | Qformat_annotate_function = intern ("format-annotate-function"); | |
5790 | staticpro (&Qformat_annotate_function); | |
5791 | ||
d6a3cc15 RS |
5792 | Qcar_less_than_car = intern ("car-less-than-car"); |
5793 | staticpro (&Qcar_less_than_car); | |
5794 | ||
570d7624 JB |
5795 | Fput (Qfile_error, Qerror_conditions, |
5796 | Fcons (Qfile_error, Fcons (Qerror, Qnil))); | |
5797 | Fput (Qfile_error, Qerror_message, | |
5798 | build_string ("File error")); | |
5799 | ||
5800 | Fput (Qfile_already_exists, Qerror_conditions, | |
5801 | Fcons (Qfile_already_exists, | |
5802 | Fcons (Qfile_error, Fcons (Qerror, Qnil)))); | |
5803 | Fput (Qfile_already_exists, Qerror_message, | |
5804 | build_string ("File already exists")); | |
5805 | ||
c0b7b21c RS |
5806 | Fput (Qfile_date_error, Qerror_conditions, |
5807 | Fcons (Qfile_date_error, | |
5808 | Fcons (Qfile_error, Fcons (Qerror, Qnil)))); | |
5809 | Fput (Qfile_date_error, Qerror_message, | |
5810 | build_string ("Cannot set file date")); | |
5811 | ||
570d7624 JB |
5812 | DEFVAR_BOOL ("insert-default-directory", &insert_default_directory, |
5813 | "*Non-nil means when reading a filename start with default dir in minibuffer."); | |
5814 | insert_default_directory = 1; | |
5815 | ||
5816 | DEFVAR_BOOL ("vms-stmlf-recfm", &vms_stmlf_recfm, | |
5817 | "*Non-nil means write new files with record format `stmlf'.\n\ | |
5818 | nil means use format `var'. This variable is meaningful only on VMS."); | |
5819 | vms_stmlf_recfm = 0; | |
5820 | ||
199607e4 RS |
5821 | DEFVAR_LISP ("directory-sep-char", &Vdirectory_sep_char, |
5822 | "Directory separator character for built-in functions that return file names.\n\ | |
5823 | The value should be either ?/ or ?\\ (any other value is treated as ?\\).\n\ | |
5824 | This variable affects the built-in functions only on Windows,\n\ | |
5825 | on other platforms, it is initialized so that Lisp code can find out\n\ | |
5826 | what the normal separator is."); | |
199607e4 | 5827 | |
1d1826db RS |
5828 | DEFVAR_LISP ("file-name-handler-alist", &Vfile_name_handler_alist, |
5829 | "*Alist of elements (REGEXP . HANDLER) for file names handled specially.\n\ | |
5830 | If a file name matches REGEXP, then all I/O on that file is done by calling\n\ | |
5831 | HANDLER.\n\ | |
5832 | \n\ | |
5833 | The first argument given to HANDLER is the name of the I/O primitive\n\ | |
5834 | to be handled; the remaining arguments are the arguments that were\n\ | |
5835 | passed to that primitive. For example, if you do\n\ | |
5836 | (file-exists-p FILENAME)\n\ | |
5837 | and FILENAME is handled by HANDLER, then HANDLER is called like this:\n\ | |
642ef245 JB |
5838 | (funcall HANDLER 'file-exists-p FILENAME)\n\ |
5839 | The function `find-file-name-handler' checks this list for a handler\n\ | |
5840 | for its argument."); | |
09121adc RS |
5841 | Vfile_name_handler_alist = Qnil; |
5842 | ||
0414b394 KH |
5843 | DEFVAR_LISP ("set-auto-coding-function", |
5844 | &Vset_auto_coding_function, | |
7fc4808e | 5845 | "If non-nil, a function to call to decide a coding system of file.\n\ |
1255deb9 KH |
5846 | Two arguments are passed to this function: the file name\n\ |
5847 | and the length of a file contents following the point.\n\ | |
5848 | This function should return a coding system to decode the file contents.\n\ | |
5849 | It should check the file name against `auto-coding-alist'.\n\ | |
5850 | If no coding system is decided, it should check a coding system\n\ | |
7fc4808e | 5851 | specified in the heading lines with the format:\n\ |
0414b394 KH |
5852 | -*- ... coding: CODING-SYSTEM; ... -*-\n\ |
5853 | or local variable spec of the tailing lines with `coding:' tag."); | |
5854 | Vset_auto_coding_function = Qnil; | |
c9e82392 | 5855 | |
d6a3cc15 | 5856 | DEFVAR_LISP ("after-insert-file-functions", &Vafter_insert_file_functions, |
246cfea5 RS |
5857 | "A list of functions to be called at the end of `insert-file-contents'.\n\ |
5858 | Each is passed one argument, the number of bytes inserted. It should return\n\ | |
5859 | the new byte count, and leave point the same. If `insert-file-contents' is\n\ | |
5860 | intercepted by a handler from `file-name-handler-alist', that handler is\n\ | |
d6a3cc15 RS |
5861 | responsible for calling the after-insert-file-functions if appropriate."); |
5862 | Vafter_insert_file_functions = Qnil; | |
5863 | ||
5864 | DEFVAR_LISP ("write-region-annotate-functions", &Vwrite_region_annotate_functions, | |
246cfea5 | 5865 | "A list of functions to be called at the start of `write-region'.\n\ |
568aa585 RS |
5866 | Each is passed two arguments, START and END as for `write-region'.\n\ |
5867 | These are usually two numbers but not always; see the documentation\n\ | |
5868 | for `write-region'. The function should return a list of pairs\n\ | |
5869 | of the form (POSITION . STRING), consisting of strings to be effectively\n\ | |
246cfea5 RS |
5870 | inserted at the specified positions of the file being written (1 means to\n\ |
5871 | insert before the first byte written). The POSITIONs must be sorted into\n\ | |
5872 | increasing order. If there are several functions in the list, the several\n\ | |
d6a3cc15 RS |
5873 | lists are merged destructively."); |
5874 | Vwrite_region_annotate_functions = Qnil; | |
5875 | ||
6fc6f94b RS |
5876 | DEFVAR_LISP ("write-region-annotations-so-far", |
5877 | &Vwrite_region_annotations_so_far, | |
5878 | "When an annotation function is called, this holds the previous annotations.\n\ | |
5879 | These are the annotations made by other annotation functions\n\ | |
5880 | that were already called. See also `write-region-annotate-functions'."); | |
5881 | Vwrite_region_annotations_so_far = Qnil; | |
5882 | ||
82c2d839 | 5883 | DEFVAR_LISP ("inhibit-file-name-handlers", &Vinhibit_file_name_handlers, |
268466ed | 5884 | "A list of file name handlers that temporarily should not be used.\n\ |
e3e86241 | 5885 | This applies only to the operation `inhibit-file-name-operation'."); |
82c2d839 RS |
5886 | Vinhibit_file_name_handlers = Qnil; |
5887 | ||
a65970a0 RS |
5888 | DEFVAR_LISP ("inhibit-file-name-operation", &Vinhibit_file_name_operation, |
5889 | "The operation for which `inhibit-file-name-handlers' is applicable."); | |
5890 | Vinhibit_file_name_operation = Qnil; | |
5891 | ||
e54d3b5d | 5892 | DEFVAR_LISP ("auto-save-list-file-name", &Vauto_save_list_file_name, |
51931aca KH |
5893 | "File name in which we write a list of all auto save file names.\n\ |
5894 | This variable is initialized automatically from `auto-save-list-file-prefix'\n\ | |
5895 | shortly after Emacs reads your `.emacs' file, if you have not yet given it\n\ | |
5896 | a non-nil value."); | |
e54d3b5d RS |
5897 | Vauto_save_list_file_name = Qnil; |
5898 | ||
642ef245 | 5899 | defsubr (&Sfind_file_name_handler); |
570d7624 JB |
5900 | defsubr (&Sfile_name_directory); |
5901 | defsubr (&Sfile_name_nondirectory); | |
642ef245 | 5902 | defsubr (&Sunhandled_file_name_directory); |
570d7624 JB |
5903 | defsubr (&Sfile_name_as_directory); |
5904 | defsubr (&Sdirectory_file_name); | |
5905 | defsubr (&Smake_temp_name); | |
5906 | defsubr (&Sexpand_file_name); | |
5907 | defsubr (&Ssubstitute_in_file_name); | |
5908 | defsubr (&Scopy_file); | |
9bbe01fb | 5909 | defsubr (&Smake_directory_internal); |
aa734e17 | 5910 | defsubr (&Sdelete_directory); |
570d7624 JB |
5911 | defsubr (&Sdelete_file); |
5912 | defsubr (&Srename_file); | |
5913 | defsubr (&Sadd_name_to_file); | |
5914 | #ifdef S_IFLNK | |
5915 | defsubr (&Smake_symbolic_link); | |
5916 | #endif /* S_IFLNK */ | |
5917 | #ifdef VMS | |
5918 | defsubr (&Sdefine_logical_name); | |
5919 | #endif /* VMS */ | |
5920 | #ifdef HPUX_NET | |
5921 | defsubr (&Ssysnetunam); | |
5922 | #endif /* HPUX_NET */ | |
5923 | defsubr (&Sfile_name_absolute_p); | |
5924 | defsubr (&Sfile_exists_p); | |
5925 | defsubr (&Sfile_executable_p); | |
5926 | defsubr (&Sfile_readable_p); | |
5927 | defsubr (&Sfile_writable_p); | |
1f8653eb | 5928 | defsubr (&Saccess_file); |
570d7624 JB |
5929 | defsubr (&Sfile_symlink_p); |
5930 | defsubr (&Sfile_directory_p); | |
b72dea2a | 5931 | defsubr (&Sfile_accessible_directory_p); |
f793dc6c | 5932 | defsubr (&Sfile_regular_p); |
570d7624 JB |
5933 | defsubr (&Sfile_modes); |
5934 | defsubr (&Sset_file_modes); | |
c24e9a53 RS |
5935 | defsubr (&Sset_default_file_modes); |
5936 | defsubr (&Sdefault_file_modes); | |
570d7624 JB |
5937 | defsubr (&Sfile_newer_than_file_p); |
5938 | defsubr (&Sinsert_file_contents); | |
5939 | defsubr (&Swrite_region); | |
d6a3cc15 | 5940 | defsubr (&Scar_less_than_car); |
570d7624 JB |
5941 | defsubr (&Sverify_visited_file_modtime); |
5942 | defsubr (&Sclear_visited_file_modtime); | |
f5d5eccf | 5943 | defsubr (&Svisited_file_modtime); |
570d7624 JB |
5944 | defsubr (&Sset_visited_file_modtime); |
5945 | defsubr (&Sdo_auto_save); | |
5946 | defsubr (&Sset_buffer_auto_saved); | |
b60247d9 | 5947 | defsubr (&Sclear_buffer_auto_save_failure); |
570d7624 JB |
5948 | defsubr (&Srecent_auto_save_p); |
5949 | ||
5950 | defsubr (&Sread_file_name_internal); | |
5951 | defsubr (&Sread_file_name); | |
85ffea93 | 5952 | |
483a2e10 | 5953 | #ifdef unix |
85ffea93 | 5954 | defsubr (&Sunix_sync); |
483a2e10 | 5955 | #endif |
570d7624 | 5956 | } |
71e1147d | 5957 |