1 /* File IO for GNU Emacs.
3 Copyright (C) 1985-1988, 1993-2012 Free Software Foundation, Inc.
5 This file is part of GNU Emacs.
7 GNU Emacs is free software: you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation, either version 3 of the License, or
10 (at your option) any later version.
12 GNU Emacs is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. */
24 #include <sys/types.h>
36 #ifdef HAVE_LIBSELINUX
37 #include <selinux/selinux.h>
38 #include <selinux/context.h>
42 #include "intervals.h"
44 #include "character.h"
47 #include "blockinput.h"
49 #include "dispextern.h"
55 #endif /* not WINDOWSNT */
59 #include <sys/param.h>
64 /* On Windows, drive letters must be alphabetic - on DOS, the Netware
65 redirector allows the six letters between 'Z' and 'a' as well. */
67 #define IS_DRIVE(x) ((x) >= 'A' && (x) <= 'z')
70 #define IS_DRIVE(x) isalpha ((unsigned char) (x))
72 /* Need to lower-case the drive letter, or else expanded
73 filenames will sometimes compare unequal, because
74 `expand-file-name' doesn't always down-case the drive letter. */
75 #define DRIVE_LETTER(x) (tolower ((unsigned char) (x)))
86 #ifndef FILE_SYSTEM_CASE
87 #define FILE_SYSTEM_CASE(filename) (filename)
90 /* Nonzero during writing of auto-save files */
91 static int auto_saving
;
93 /* Nonzero umask during creation of auto-save directories */
94 static int auto_saving_dir_umask
;
96 /* Set by auto_save_1 to mode of original file so Fwrite_region will create
97 a new file with the same mode as the original */
98 static int auto_save_mode_bits
;
100 /* Set by auto_save_1 if an error occurred during the last auto-save. */
101 static int auto_save_error_occurred
;
103 /* The symbol bound to coding-system-for-read when
104 insert-file-contents is called for recovering a file. This is not
105 an actual coding system name, but just an indicator to tell
106 insert-file-contents to use `emacs-mule' with a special flag for
107 auto saving and recovering a file. */
108 static Lisp_Object Qauto_save_coding
;
110 /* Property name of a file name handler,
111 which gives a list of operations it handles.. */
112 static Lisp_Object Qoperations
;
114 /* Lisp functions for translating file formats */
115 static Lisp_Object Qformat_decode
, Qformat_annotate_function
;
117 /* Lisp function for setting buffer-file-coding-system and the
118 multibyteness of the current buffer after inserting a file. */
119 static Lisp_Object Qafter_insert_file_set_coding
;
121 static Lisp_Object Qwrite_region_annotate_functions
;
122 /* Each time an annotation function changes the buffer, the new buffer
124 static Lisp_Object Vwrite_region_annotation_buffers
;
129 static Lisp_Object Qdelete_by_moving_to_trash
;
131 /* Lisp function for moving files to trash. */
132 static Lisp_Object Qmove_file_to_trash
;
134 /* Lisp function for recursively copying directories. */
135 static Lisp_Object Qcopy_directory
;
137 /* Lisp function for recursively deleting directories. */
138 static Lisp_Object Qdelete_directory
;
143 Lisp_Object Qfile_error
;
144 static Lisp_Object Qfile_already_exists
, Qfile_date_error
;
145 static Lisp_Object Qexcl
;
146 Lisp_Object Qfile_name_history
;
148 static Lisp_Object Qcar_less_than_car
;
150 static Lisp_Object
Fmake_symbolic_link (Lisp_Object
, Lisp_Object
, Lisp_Object
);
151 static int a_write (int, Lisp_Object
, EMACS_INT
, EMACS_INT
,
152 Lisp_Object
*, struct coding_system
*);
153 static int e_write (int, Lisp_Object
, EMACS_INT
, EMACS_INT
,
154 struct coding_system
*);
158 report_file_error (const char *string
, Lisp_Object data
)
160 Lisp_Object errstring
;
164 synchronize_system_messages_locale ();
165 str
= strerror (errorno
);
166 errstring
= code_convert_string_norecord (make_unibyte_string (str
,
168 Vlocale_coding_system
, 0);
174 xsignal (Qfile_already_exists
, Fcons (errstring
, data
));
177 /* System error messages are capitalized. Downcase the initial
178 unless it is followed by a slash. (The slash case caters to
179 error messages that begin with "I/O" or, in German, "E/A".) */
180 if (STRING_MULTIBYTE (errstring
)
181 && ! EQ (Faref (errstring
, make_number (1)), make_number ('/')))
185 str
= SSDATA (errstring
);
186 c
= STRING_CHAR ((unsigned char *) str
);
187 Faset (errstring
, make_number (0), make_number (downcase (c
)));
190 xsignal (Qfile_error
,
191 Fcons (build_string (string
), Fcons (errstring
, data
)));
196 close_file_unwind (Lisp_Object fd
)
198 emacs_close (XFASTINT (fd
));
202 /* Restore point, having saved it as a marker. */
205 restore_point_unwind (Lisp_Object location
)
207 Fgoto_char (location
);
208 Fset_marker (location
, Qnil
, Qnil
);
213 static Lisp_Object Qexpand_file_name
;
214 static Lisp_Object Qsubstitute_in_file_name
;
215 static Lisp_Object Qdirectory_file_name
;
216 static Lisp_Object Qfile_name_directory
;
217 static Lisp_Object Qfile_name_nondirectory
;
218 static Lisp_Object Qunhandled_file_name_directory
;
219 static Lisp_Object Qfile_name_as_directory
;
220 static Lisp_Object Qcopy_file
;
221 static Lisp_Object Qmake_directory_internal
;
222 static Lisp_Object Qmake_directory
;
223 static Lisp_Object Qdelete_directory_internal
;
224 Lisp_Object Qdelete_file
;
225 static Lisp_Object Qrename_file
;
226 static Lisp_Object Qadd_name_to_file
;
227 static Lisp_Object Qmake_symbolic_link
;
228 Lisp_Object Qfile_exists_p
;
229 static Lisp_Object Qfile_executable_p
;
230 static Lisp_Object Qfile_readable_p
;
231 static Lisp_Object Qfile_writable_p
;
232 static Lisp_Object Qfile_symlink_p
;
233 static Lisp_Object Qaccess_file
;
234 Lisp_Object Qfile_directory_p
;
235 static Lisp_Object Qfile_regular_p
;
236 static Lisp_Object Qfile_accessible_directory_p
;
237 static Lisp_Object Qfile_modes
;
238 static Lisp_Object Qset_file_modes
;
239 static Lisp_Object Qset_file_times
;
240 static Lisp_Object Qfile_selinux_context
;
241 static Lisp_Object Qset_file_selinux_context
;
242 static Lisp_Object Qfile_newer_than_file_p
;
243 Lisp_Object Qinsert_file_contents
;
244 Lisp_Object Qwrite_region
;
245 static Lisp_Object Qverify_visited_file_modtime
;
246 static Lisp_Object Qset_visited_file_modtime
;
248 DEFUN ("find-file-name-handler", Ffind_file_name_handler
,
249 Sfind_file_name_handler
, 2, 2, 0,
250 doc
: /* Return FILENAME's handler function for OPERATION, if it has one.
251 Otherwise, return nil.
252 A file name is handled if one of the regular expressions in
253 `file-name-handler-alist' matches it.
255 If OPERATION equals `inhibit-file-name-operation', then we ignore
256 any handlers that are members of `inhibit-file-name-handlers',
257 but we still do run any other handlers. This lets handlers
258 use the standard functions without calling themselves recursively. */)
259 (Lisp_Object filename
, Lisp_Object operation
)
261 /* This function must not munge the match data. */
262 Lisp_Object chain
, inhibited_handlers
, result
;
266 CHECK_STRING (filename
);
268 if (EQ (operation
, Vinhibit_file_name_operation
))
269 inhibited_handlers
= Vinhibit_file_name_handlers
;
271 inhibited_handlers
= Qnil
;
273 for (chain
= Vfile_name_handler_alist
; CONSP (chain
);
274 chain
= XCDR (chain
))
280 Lisp_Object string
= XCAR (elt
);
282 Lisp_Object handler
= XCDR (elt
);
283 Lisp_Object operations
= Qnil
;
285 if (SYMBOLP (handler
))
286 operations
= Fget (handler
, Qoperations
);
289 && (match_pos
= fast_string_match (string
, filename
)) > pos
290 && (NILP (operations
) || ! NILP (Fmemq (operation
, operations
))))
294 handler
= XCDR (elt
);
295 tem
= Fmemq (handler
, inhibited_handlers
);
309 DEFUN ("file-name-directory", Ffile_name_directory
, Sfile_name_directory
,
311 doc
: /* Return the directory component in file name FILENAME.
312 Return nil if FILENAME does not include a directory.
313 Otherwise return a directory name.
314 Given a Unix syntax file name, returns a string ending in slash. */)
315 (Lisp_Object filename
)
318 register const char *beg
;
322 register const char *p
;
325 CHECK_STRING (filename
);
327 /* If the file name has special constructs in it,
328 call the corresponding file handler. */
329 handler
= Ffind_file_name_handler (filename
, Qfile_name_directory
);
332 Lisp_Object handled_name
= call2 (handler
, Qfile_name_directory
,
334 return STRINGP (handled_name
) ? handled_name
: Qnil
;
337 filename
= FILE_SYSTEM_CASE (filename
);
339 beg
= (char *) alloca (SBYTES (filename
) + 1);
340 memcpy (beg
, SSDATA (filename
), SBYTES (filename
) + 1);
342 beg
= SSDATA (filename
);
344 p
= beg
+ SBYTES (filename
);
346 while (p
!= beg
&& !IS_DIRECTORY_SEP (p
[-1])
348 /* only recognize drive specifier at the beginning */
350 /* handle the "/:d:foo" and "/:foo" cases correctly */
351 && ((p
== beg
+ 2 && !IS_DIRECTORY_SEP (*beg
))
352 || (p
== beg
+ 4 && IS_DIRECTORY_SEP (*beg
))))
359 /* Expansion of "c:" to drive and default directory. */
362 /* MAXPATHLEN+1 is guaranteed to be enough space for getdefdir. */
363 char *res
= alloca (MAXPATHLEN
+ 1);
366 if (p
== beg
+ 4 && IS_DIRECTORY_SEP (*beg
) && beg
[1] == ':')
368 strncpy (res
, beg
, 2);
373 if (getdefdir (toupper ((unsigned char) *beg
) - 'A' + 1, r
))
375 if (!IS_DIRECTORY_SEP (res
[strlen (res
) - 1]))
378 p
= beg
+ strlen (beg
);
381 dostounix_filename (beg
);
384 return make_specified_string (beg
, -1, p
- beg
, STRING_MULTIBYTE (filename
));
387 DEFUN ("file-name-nondirectory", Ffile_name_nondirectory
,
388 Sfile_name_nondirectory
, 1, 1, 0,
389 doc
: /* Return file name FILENAME sans its directory.
390 For example, in a Unix-syntax file name,
391 this is everything after the last slash,
392 or the entire name if it contains no slash. */)
393 (Lisp_Object filename
)
395 register const char *beg
, *p
, *end
;
398 CHECK_STRING (filename
);
400 /* If the file name has special constructs in it,
401 call the corresponding file handler. */
402 handler
= Ffind_file_name_handler (filename
, Qfile_name_nondirectory
);
405 Lisp_Object handled_name
= call2 (handler
, Qfile_name_nondirectory
,
407 if (STRINGP (handled_name
))
409 error ("Invalid handler in `file-name-handler-alist'");
412 beg
= SSDATA (filename
);
413 end
= p
= beg
+ SBYTES (filename
);
415 while (p
!= beg
&& !IS_DIRECTORY_SEP (p
[-1])
417 /* only recognize drive specifier at beginning */
419 /* handle the "/:d:foo" case correctly */
420 && (p
== beg
+ 2 || (p
== beg
+ 4 && IS_DIRECTORY_SEP (*beg
))))
425 return make_specified_string (p
, -1, end
- p
, STRING_MULTIBYTE (filename
));
428 DEFUN ("unhandled-file-name-directory", Funhandled_file_name_directory
,
429 Sunhandled_file_name_directory
, 1, 1, 0,
430 doc
: /* Return a directly usable directory name somehow associated with FILENAME.
431 A `directly usable' directory name is one that may be used without the
432 intervention of any file handler.
433 If FILENAME is a directly usable file itself, return
434 \(file-name-directory FILENAME).
435 If FILENAME refers to a file which is not accessible from a local process,
436 then this should return nil.
437 The `call-process' and `start-process' functions use this function to
438 get a current directory to run processes in. */)
439 (Lisp_Object filename
)
443 /* If the file name has special constructs in it,
444 call the corresponding file handler. */
445 handler
= Ffind_file_name_handler (filename
, Qunhandled_file_name_directory
);
448 Lisp_Object handled_name
= call2 (handler
, Qunhandled_file_name_directory
,
450 return STRINGP (handled_name
) ? handled_name
: Qnil
;
453 return Ffile_name_directory (filename
);
458 file_name_as_directory (char *out
, const char *in
)
460 ptrdiff_t len
= strlen (in
);
472 /* For Unix syntax, Append a slash if necessary */
473 if (!IS_DIRECTORY_SEP (out
[len
- 1]))
475 out
[len
] = DIRECTORY_SEP
;
479 dostounix_filename (out
);
484 DEFUN ("file-name-as-directory", Ffile_name_as_directory
,
485 Sfile_name_as_directory
, 1, 1, 0,
486 doc
: /* Return a string representing the file name FILE interpreted as a directory.
487 This operation exists because a directory is also a file, but its name as
488 a directory is different from its name as a file.
489 The result can be used as the value of `default-directory'
490 or passed as second argument to `expand-file-name'.
491 For a Unix-syntax file name, just appends a slash. */)
501 /* If the file name has special constructs in it,
502 call the corresponding file handler. */
503 handler
= Ffind_file_name_handler (file
, Qfile_name_as_directory
);
506 Lisp_Object handled_name
= call2 (handler
, Qfile_name_as_directory
,
508 if (STRINGP (handled_name
))
510 error ("Invalid handler in `file-name-handler-alist'");
513 buf
= (char *) alloca (SBYTES (file
) + 10);
514 file_name_as_directory (buf
, SSDATA (file
));
515 return make_specified_string (buf
, -1, strlen (buf
),
516 STRING_MULTIBYTE (file
));
520 * Convert from directory name to filename.
521 * On UNIX, it's simple: just make sure there isn't a terminating /
523 * Value is nonzero if the string output is different from the input.
527 directory_file_name (char *src
, char *dst
)
533 /* Process as Unix format: just remove any final slash.
534 But leave "/" unchanged; do not change it to "". */
537 && IS_DIRECTORY_SEP (dst
[slen
- 1])
539 && !IS_ANY_SEP (dst
[slen
- 2])
544 dostounix_filename (dst
);
549 DEFUN ("directory-file-name", Fdirectory_file_name
, Sdirectory_file_name
,
551 doc
: /* Returns the file name of the directory named DIRECTORY.
552 This is the name of the file that holds the data for the directory DIRECTORY.
553 This operation exists because a directory is also a file, but its name as
554 a directory is different from its name as a file.
555 In Unix-syntax, this function just removes the final slash. */)
556 (Lisp_Object directory
)
561 CHECK_STRING (directory
);
563 if (NILP (directory
))
566 /* If the file name has special constructs in it,
567 call the corresponding file handler. */
568 handler
= Ffind_file_name_handler (directory
, Qdirectory_file_name
);
571 Lisp_Object handled_name
= call2 (handler
, Qdirectory_file_name
,
573 if (STRINGP (handled_name
))
575 error ("Invalid handler in `file-name-handler-alist'");
578 buf
= (char *) alloca (SBYTES (directory
) + 20);
579 directory_file_name (SSDATA (directory
), buf
);
580 return make_specified_string (buf
, -1, strlen (buf
),
581 STRING_MULTIBYTE (directory
));
584 static const char make_temp_name_tbl
[64] =
586 'A','B','C','D','E','F','G','H',
587 'I','J','K','L','M','N','O','P',
588 'Q','R','S','T','U','V','W','X',
589 'Y','Z','a','b','c','d','e','f',
590 'g','h','i','j','k','l','m','n',
591 'o','p','q','r','s','t','u','v',
592 'w','x','y','z','0','1','2','3',
593 '4','5','6','7','8','9','-','_'
596 static unsigned make_temp_name_count
, make_temp_name_count_initialized_p
;
598 /* Value is a temporary file name starting with PREFIX, a string.
600 The Emacs process number forms part of the result, so there is
601 no danger of generating a name being used by another process.
602 In addition, this function makes an attempt to choose a name
603 which has no existing file. To make this work, PREFIX should be
604 an absolute file name.
606 BASE64_P non-zero means add the pid as 3 characters in base64
607 encoding. In this case, 6 characters will be added to PREFIX to
608 form the file name. Otherwise, if Emacs is running on a system
609 with long file names, add the pid as a decimal number.
611 This function signals an error if no unique file name could be
615 make_temp_name (Lisp_Object prefix
, int base64_p
)
621 char pidbuf
[INT_BUFSIZE_BOUND (printmax_t
)];
624 CHECK_STRING (prefix
);
626 /* VAL is created by adding 6 characters to PREFIX. The first
627 three are the PID of this process, in base 64, and the second
628 three are incremented if the file already exists. This ensures
629 262144 unique file names per PID per PREFIX. */
635 pidbuf
[0] = make_temp_name_tbl
[pid
& 63], pid
>>= 6;
636 pidbuf
[1] = make_temp_name_tbl
[pid
& 63], pid
>>= 6;
637 pidbuf
[2] = make_temp_name_tbl
[pid
& 63], pid
>>= 6;
642 #ifdef HAVE_LONG_FILE_NAMES
643 pidlen
= sprintf (pidbuf
, "%"pMd
, pid
);
645 pidbuf
[0] = make_temp_name_tbl
[pid
& 63], pid
>>= 6;
646 pidbuf
[1] = make_temp_name_tbl
[pid
& 63], pid
>>= 6;
647 pidbuf
[2] = make_temp_name_tbl
[pid
& 63], pid
>>= 6;
652 len
= SBYTES (prefix
); clen
= SCHARS (prefix
);
653 val
= make_uninit_multibyte_string (clen
+ 3 + pidlen
, len
+ 3 + pidlen
);
654 if (!STRING_MULTIBYTE (prefix
))
655 STRING_SET_UNIBYTE (val
);
657 memcpy (data
, SSDATA (prefix
), len
);
660 memcpy (p
, pidbuf
, pidlen
);
663 /* Here we try to minimize useless stat'ing when this function is
664 invoked many times successively with the same PREFIX. We achieve
665 this by initializing count to a random value, and incrementing it
668 We don't want make-temp-name to be called while dumping,
669 because then make_temp_name_count_initialized_p would get set
670 and then make_temp_name_count would not be set when Emacs starts. */
672 if (!make_temp_name_count_initialized_p
)
674 make_temp_name_count
= time (NULL
);
675 make_temp_name_count_initialized_p
= 1;
681 unsigned num
= make_temp_name_count
;
683 p
[0] = make_temp_name_tbl
[num
& 63], num
>>= 6;
684 p
[1] = make_temp_name_tbl
[num
& 63], num
>>= 6;
685 p
[2] = make_temp_name_tbl
[num
& 63], num
>>= 6;
687 /* Poor man's congruential RN generator. Replace with
688 ++make_temp_name_count for debugging. */
689 make_temp_name_count
+= 25229;
690 make_temp_name_count
%= 225307;
692 if (stat (data
, &ignored
) < 0)
694 /* We want to return only if errno is ENOENT. */
698 /* The error here is dubious, but there is little else we
699 can do. The alternatives are to return nil, which is
700 as bad as (and in many cases worse than) throwing the
701 error, or to ignore the error, which will likely result
702 in looping through 225307 stat's, which is not only
703 dog-slow, but also useless since eventually nil would
704 have to be returned anyway. */
705 report_file_error ("Cannot create temporary name for prefix",
706 Fcons (prefix
, Qnil
));
713 DEFUN ("make-temp-name", Fmake_temp_name
, Smake_temp_name
, 1, 1, 0,
714 doc
: /* Generate temporary file name (string) starting with PREFIX (a string).
715 The Emacs process number forms part of the result,
716 so there is no danger of generating a name being used by another process.
718 In addition, this function makes an attempt to choose a name
719 which has no existing file. To make this work,
720 PREFIX should be an absolute file name.
722 There is a race condition between calling `make-temp-name' and creating the
723 file which opens all kinds of security holes. For that reason, you should
724 probably use `make-temp-file' instead, except in three circumstances:
726 * If you are creating the file in the user's home directory.
727 * If you are creating a directory rather than an ordinary file.
728 * If you are taking special precautions as `make-temp-file' does. */)
731 return make_temp_name (prefix
, 0);
736 DEFUN ("expand-file-name", Fexpand_file_name
, Sexpand_file_name
, 1, 2, 0,
737 doc
: /* Convert filename NAME to absolute, and canonicalize it.
738 Second arg DEFAULT-DIRECTORY is directory to start with if NAME is relative
739 \(does not start with slash or tilde); if DEFAULT-DIRECTORY is nil or missing,
740 the current buffer's value of `default-directory' is used.
741 NAME should be a string that is a valid file name for the underlying
743 File name components that are `.' are removed, and
744 so are file name components followed by `..', along with the `..' itself;
745 note that these simplifications are done without checking the resulting
746 file names in the file system.
747 Multiple consecutive slashes are collapsed into a single slash,
748 except at the beginning of the file name when they are significant (e.g.,
749 UNC file names on MS-Windows.)
750 An initial `~/' expands to your home directory.
751 An initial `~USER/' expands to USER's home directory.
752 See also the function `substitute-in-file-name'.
754 For technical reasons, this function can return correct but
755 non-intuitive results for the root directory; for instance,
756 \(expand-file-name ".." "/") returns "/..". For this reason, use
757 \(directory-file-name (file-name-directory dirname)) to traverse a
758 filesystem tree, not (expand-file-name ".." dirname). */)
759 (Lisp_Object name
, Lisp_Object default_directory
)
761 /* These point to SDATA and need to be careful with string-relocation
762 during GC (via DECODE_FILE). */
765 /* This should only point to alloca'd data. */
772 int collapse_newdir
= 1;
776 Lisp_Object handler
, result
, handled_name
;
782 /* If the file name has special constructs in it,
783 call the corresponding file handler. */
784 handler
= Ffind_file_name_handler (name
, Qexpand_file_name
);
787 handled_name
= call3 (handler
, Qexpand_file_name
,
788 name
, default_directory
);
789 if (STRINGP (handled_name
))
791 error ("Invalid handler in `file-name-handler-alist'");
795 /* Use the buffer's default-directory if DEFAULT_DIRECTORY is omitted. */
796 if (NILP (default_directory
))
797 default_directory
= BVAR (current_buffer
, directory
);
798 if (! STRINGP (default_directory
))
801 /* "/" is not considered a root directory on DOS_NT, so using "/"
802 here causes an infinite recursion in, e.g., the following:
804 (let (default-directory)
805 (expand-file-name "a"))
807 To avoid this, we set default_directory to the root of the
809 default_directory
= build_string (emacs_root_dir ());
811 default_directory
= build_string ("/");
815 if (!NILP (default_directory
))
817 handler
= Ffind_file_name_handler (default_directory
, Qexpand_file_name
);
820 handled_name
= call3 (handler
, Qexpand_file_name
,
821 name
, default_directory
);
822 if (STRINGP (handled_name
))
824 error ("Invalid handler in `file-name-handler-alist'");
829 char *o
= SSDATA (default_directory
);
831 /* Make sure DEFAULT_DIRECTORY is properly expanded.
832 It would be better to do this down below where we actually use
833 default_directory. Unfortunately, calling Fexpand_file_name recursively
834 could invoke GC, and the strings might be relocated. This would
835 be annoying because we have pointers into strings lying around
836 that would need adjusting, and people would add new pointers to
837 the code and forget to adjust them, resulting in intermittent bugs.
838 Putting this call here avoids all that crud.
840 The EQ test avoids infinite recursion. */
841 if (! NILP (default_directory
) && !EQ (default_directory
, name
)
842 /* Save time in some common cases - as long as default_directory
843 is not relative, it can be canonicalized with name below (if it
844 is needed at all) without requiring it to be expanded now. */
846 /* Detect MSDOS file names with drive specifiers. */
847 && ! (IS_DRIVE (o
[0]) && IS_DEVICE_SEP (o
[1])
848 && IS_DIRECTORY_SEP (o
[2]))
850 /* Detect Windows file names in UNC format. */
851 && ! (IS_DIRECTORY_SEP (o
[0]) && IS_DIRECTORY_SEP (o
[1]))
853 #else /* not DOS_NT */
854 /* Detect Unix absolute file names (/... alone is not absolute on
856 && ! (IS_DIRECTORY_SEP (o
[0]))
857 #endif /* not DOS_NT */
863 default_directory
= Fexpand_file_name (default_directory
, Qnil
);
867 name
= FILE_SYSTEM_CASE (name
);
868 multibyte
= STRING_MULTIBYTE (name
);
869 if (multibyte
!= STRING_MULTIBYTE (default_directory
))
872 default_directory
= string_to_multibyte (default_directory
);
875 name
= string_to_multibyte (name
);
880 /* Make a local copy of nm[] to protect it from GC in DECODE_FILE below. */
881 nm
= (char *) alloca (SBYTES (name
) + 1);
882 memcpy (nm
, SSDATA (name
), SBYTES (name
) + 1);
885 /* Note if special escape prefix is present, but remove for now. */
886 if (nm
[0] == '/' && nm
[1] == ':')
892 /* Find and remove drive specifier if present; this makes nm absolute
893 even if the rest of the name appears to be relative. Only look for
894 drive specifier at the beginning. */
895 if (IS_DRIVE (nm
[0]) && IS_DEVICE_SEP (nm
[1]))
897 drive
= (unsigned char) nm
[0];
902 /* If we see "c://somedir", we want to strip the first slash after the
903 colon when stripping the drive letter. Otherwise, this expands to
905 if (drive
&& IS_DIRECTORY_SEP (nm
[0]) && IS_DIRECTORY_SEP (nm
[1]))
908 /* Discard any previous drive specifier if nm is now in UNC format. */
909 if (IS_DIRECTORY_SEP (nm
[0]) && IS_DIRECTORY_SEP (nm
[1]))
913 #endif /* WINDOWSNT */
916 /* If nm is absolute, look for `/./' or `/../' or `//''sequences; if
917 none are found, we can probably return right away. We will avoid
918 allocating a new string if name is already fully expanded. */
920 IS_DIRECTORY_SEP (nm
[0])
922 && drive
&& !is_escaped
925 && (drive
|| IS_DIRECTORY_SEP (nm
[1])) && !is_escaped
929 /* If it turns out that the filename we want to return is just a
930 suffix of FILENAME, we don't need to go through and edit
931 things; we just need to construct a new string using data
932 starting at the middle of FILENAME. If we set lose to a
933 non-zero value, that means we've discovered that we can't do
940 /* Since we know the name is absolute, we can assume that each
941 element starts with a "/". */
943 /* "." and ".." are hairy. */
944 if (IS_DIRECTORY_SEP (p
[0])
946 && (IS_DIRECTORY_SEP (p
[2])
948 || (p
[2] == '.' && (IS_DIRECTORY_SEP (p
[3])
951 /* We want to replace multiple `/' in a row with a single
954 && IS_DIRECTORY_SEP (p
[0])
955 && IS_DIRECTORY_SEP (p
[1]))
962 /* Make sure directories are all separated with /, but
963 avoid allocation of a new string when not required. */
964 dostounix_filename (nm
);
966 if (IS_DIRECTORY_SEP (nm
[1]))
968 if (strcmp (nm
, SSDATA (name
)) != 0)
969 name
= make_specified_string (nm
, -1, strlen (nm
), multibyte
);
973 /* drive must be set, so this is okay */
974 if (strcmp (nm
- 2, SSDATA (name
)) != 0)
978 name
= make_specified_string (nm
, -1, p
- nm
, multibyte
);
979 temp
[0] = DRIVE_LETTER (drive
);
980 name
= concat2 (build_string (temp
), name
);
983 #else /* not DOS_NT */
984 if (strcmp (nm
, SSDATA (name
)) == 0)
986 return make_specified_string (nm
, -1, strlen (nm
), multibyte
);
987 #endif /* not DOS_NT */
991 /* At this point, nm might or might not be an absolute file name. We
992 need to expand ~ or ~user if present, otherwise prefix nm with
993 default_directory if nm is not absolute, and finally collapse /./
994 and /foo/../ sequences.
996 We set newdir to be the appropriate prefix if one is needed:
997 - the relevant user directory if nm starts with ~ or ~user
998 - the specified drive's working dir (DOS/NT only) if nm does not
1000 - the value of default_directory.
1002 Note that these prefixes are not guaranteed to be absolute (except
1003 for the working dir of a drive). Therefore, to ensure we always
1004 return an absolute name, if the final prefix is not absolute we
1005 append it to the current working directory. */
1009 if (nm
[0] == '~') /* prefix ~ */
1011 if (IS_DIRECTORY_SEP (nm
[1])
1012 || nm
[1] == 0) /* ~ by itself */
1016 if (!(newdir
= egetenv ("HOME")))
1019 /* egetenv may return a unibyte string, which will bite us since
1020 we expect the directory to be multibyte. */
1021 tem
= build_string (newdir
);
1022 if (!STRING_MULTIBYTE (tem
))
1024 hdir
= DECODE_FILE (tem
);
1025 newdir
= SSDATA (hdir
);
1028 collapse_newdir
= 0;
1031 else /* ~user/filename */
1034 for (p
= nm
; *p
&& (!IS_DIRECTORY_SEP (*p
)); p
++);
1035 o
= alloca (p
- nm
+ 1);
1036 memcpy (o
, nm
, p
- nm
);
1040 pw
= (struct passwd
*) getpwnam (o
+ 1);
1044 newdir
= pw
->pw_dir
;
1047 collapse_newdir
= 0;
1051 /* If we don't find a user of that name, leave the name
1052 unchanged; don't move nm forward to p. */
1057 /* On DOS and Windows, nm is absolute if a drive name was specified;
1058 use the drive's current directory as the prefix if needed. */
1059 if (!newdir
&& drive
)
1061 /* Get default directory if needed to make nm absolute. */
1063 if (!IS_DIRECTORY_SEP (nm
[0]))
1065 adir
= alloca (MAXPATHLEN
+ 1);
1066 if (!getdefdir (toupper (drive
) - 'A' + 1, adir
))
1071 /* Either nm starts with /, or drive isn't mounted. */
1073 adir
[0] = DRIVE_LETTER (drive
);
1082 /* Finally, if no prefix has been specified and nm is not absolute,
1083 then it must be expanded relative to default_directory. */
1087 /* /... alone is not absolute on DOS and Windows. */
1088 && !IS_DIRECTORY_SEP (nm
[0])
1091 && !(IS_DIRECTORY_SEP (nm
[0]) && IS_DIRECTORY_SEP (nm
[1]))
1095 newdir
= SSDATA (default_directory
);
1097 /* Note if special escape prefix is present, but remove for now. */
1098 if (newdir
[0] == '/' && newdir
[1] == ':')
1109 /* First ensure newdir is an absolute name. */
1111 /* Detect MSDOS file names with drive specifiers. */
1112 ! (IS_DRIVE (newdir
[0])
1113 && IS_DEVICE_SEP (newdir
[1]) && IS_DIRECTORY_SEP (newdir
[2]))
1115 /* Detect Windows file names in UNC format. */
1116 && ! (IS_DIRECTORY_SEP (newdir
[0]) && IS_DIRECTORY_SEP (newdir
[1]))
1120 /* Effectively, let newdir be (expand-file-name newdir cwd).
1121 Because of the admonition against calling expand-file-name
1122 when we have pointers into lisp strings, we accomplish this
1123 indirectly by prepending newdir to nm if necessary, and using
1124 cwd (or the wd of newdir's drive) as the new newdir. */
1126 if (IS_DRIVE (newdir
[0]) && IS_DEVICE_SEP (newdir
[1]))
1128 drive
= (unsigned char) newdir
[0];
1131 if (!IS_DIRECTORY_SEP (nm
[0]))
1133 char * tmp
= alloca (strlen (newdir
) + strlen (nm
) + 2);
1134 file_name_as_directory (tmp
, newdir
);
1138 adir
= alloca (MAXPATHLEN
+ 1);
1141 if (!getdefdir (toupper (drive
) - 'A' + 1, adir
))
1149 /* Strip off drive name from prefix, if present. */
1150 if (IS_DRIVE (newdir
[0]) && IS_DEVICE_SEP (newdir
[1]))
1156 /* Keep only a prefix from newdir if nm starts with slash
1157 (//server/share for UNC, nothing otherwise). */
1158 if (IS_DIRECTORY_SEP (nm
[0]) && collapse_newdir
)
1161 if (IS_DIRECTORY_SEP (newdir
[0]) && IS_DIRECTORY_SEP (newdir
[1]))
1163 char *adir
= strcpy (alloca (strlen (newdir
) + 1), newdir
);
1165 while (*p
&& !IS_DIRECTORY_SEP (*p
)) p
++;
1167 while (*p
&& !IS_DIRECTORY_SEP (*p
)) p
++;
1180 /* Get rid of any slash at the end of newdir, unless newdir is
1181 just / or // (an incomplete UNC name). */
1182 length
= strlen (newdir
);
1183 if (length
> 1 && IS_DIRECTORY_SEP (newdir
[length
- 1])
1185 && !(length
== 2 && IS_DIRECTORY_SEP (newdir
[0]))
1189 char *temp
= (char *) alloca (length
);
1190 memcpy (temp
, newdir
, length
- 1);
1191 temp
[length
- 1] = 0;
1199 /* Now concatenate the directory and name to new space in the stack frame */
1200 tlen
+= strlen (nm
) + 1;
1202 /* Reserve space for drive specifier and escape prefix, since either
1203 or both may need to be inserted. (The Microsoft x86 compiler
1204 produces incorrect code if the following two lines are combined.) */
1205 target
= (char *) alloca (tlen
+ 4);
1207 #else /* not DOS_NT */
1208 target
= (char *) alloca (tlen
);
1209 #endif /* not DOS_NT */
1214 if (nm
[0] == 0 || IS_DIRECTORY_SEP (nm
[0]))
1217 /* If newdir is effectively "C:/", then the drive letter will have
1218 been stripped and newdir will be "/". Concatenating with an
1219 absolute directory in nm produces "//", which will then be
1220 incorrectly treated as a network share. Ignore newdir in
1221 this case (keeping the drive letter). */
1222 if (!(drive
&& nm
[0] && IS_DIRECTORY_SEP (newdir
[0])
1223 && newdir
[1] == '\0'))
1225 strcpy (target
, newdir
);
1228 file_name_as_directory (target
, newdir
);
1231 strcat (target
, nm
);
1233 /* Now canonicalize by removing `//', `/.' and `/foo/..' if they
1241 if (!IS_DIRECTORY_SEP (*p
))
1245 else if (p
[1] == '.'
1246 && (IS_DIRECTORY_SEP (p
[2])
1249 /* If "/." is the entire filename, keep the "/". Otherwise,
1250 just delete the whole "/.". */
1251 if (o
== target
&& p
[2] == '\0')
1255 else if (p
[1] == '.' && p
[2] == '.'
1256 /* `/../' is the "superroot" on certain file systems.
1257 Turned off on DOS_NT systems because they have no
1258 "superroot" and because this causes us to produce
1259 file names like "d:/../foo" which fail file-related
1260 functions of the underlying OS. (To reproduce, try a
1261 long series of "../../" in default_directory, longer
1262 than the number of levels from the root.) */
1266 && (IS_DIRECTORY_SEP (p
[3]) || p
[3] == 0))
1271 while (o
!= target
&& (--o
) && !IS_DIRECTORY_SEP (*o
))
1274 /* Don't go below server level in UNC filenames. */
1275 if (o
== target
+ 1 && IS_DIRECTORY_SEP (*o
)
1276 && IS_DIRECTORY_SEP (*target
))
1280 /* Keep initial / only if this is the whole name. */
1281 if (o
== target
&& IS_ANY_SEP (*o
) && p
[3] == 0)
1285 else if (p
> target
&& IS_DIRECTORY_SEP (p
[1]))
1286 /* Collapse multiple `/' in a row. */
1295 /* At last, set drive name. */
1297 /* Except for network file name. */
1298 if (!(IS_DIRECTORY_SEP (target
[0]) && IS_DIRECTORY_SEP (target
[1])))
1299 #endif /* WINDOWSNT */
1301 if (!drive
) abort ();
1303 target
[0] = DRIVE_LETTER (drive
);
1306 /* Reinsert the escape prefix if required. */
1313 dostounix_filename (target
);
1316 result
= make_specified_string (target
, -1, o
- target
, multibyte
);
1319 /* Again look to see if the file name has special constructs in it
1320 and perhaps call the corresponding file handler. This is needed
1321 for filenames such as "/foo/../user@host:/bar/../baz". Expanding
1322 the ".." component gives us "/user@host:/bar/../baz" which needs
1323 to be expanded again. */
1324 handler
= Ffind_file_name_handler (result
, Qexpand_file_name
);
1325 if (!NILP (handler
))
1327 handled_name
= call3 (handler
, Qexpand_file_name
,
1328 result
, default_directory
);
1329 if (STRINGP (handled_name
))
1330 return handled_name
;
1331 error ("Invalid handler in `file-name-handler-alist'");
1338 /* PLEASE DO NOT DELETE THIS COMMENTED-OUT VERSION!
1339 This is the old version of expand-file-name, before it was thoroughly
1340 rewritten for Emacs 10.31. We leave this version here commented-out,
1341 because the code is very complex and likely to have subtle bugs. If
1342 bugs _are_ found, it might be of interest to look at the old code and
1343 see what did it do in the relevant situation.
1345 Don't remove this code: it's true that it will be accessible
1346 from the repository, but a few years from deletion, people will
1347 forget it is there. */
1349 /* Changed this DEFUN to a DEAFUN, so as not to confuse `make-docfile'. */
1350 DEAFUN ("expand-file-name", Fexpand_file_name
, Sexpand_file_name
, 1, 2, 0,
1351 "Convert FILENAME to absolute, and canonicalize it.\n\
1352 Second arg DEFAULT is directory to start with if FILENAME is relative\n\
1353 \(does not start with slash); if DEFAULT is nil or missing,\n\
1354 the current buffer's value of default-directory is used.\n\
1355 Filenames containing `.' or `..' as components are simplified;\n\
1356 initial `~/' expands to your home directory.\n\
1357 See also the function `substitute-in-file-name'.")
1359 Lisp_Object name
, defalt
;
1363 register unsigned char *newdir
, *p
, *o
;
1365 unsigned char *target
;
1369 CHECK_STRING (name
);
1372 /* If nm is absolute, flush ...// and detect /./ and /../.
1373 If no /./ or /../ we can return right away. */
1380 if (p
[0] == '/' && p
[1] == '/'
1383 if (p
[0] == '/' && p
[1] == '~')
1384 nm
= p
+ 1, lose
= 1;
1385 if (p
[0] == '/' && p
[1] == '.'
1386 && (p
[2] == '/' || p
[2] == 0
1387 || (p
[2] == '.' && (p
[3] == '/' || p
[3] == 0))))
1393 if (nm
== SDATA (name
))
1395 return build_string (nm
);
1399 /* Now determine directory to start with and put it in NEWDIR */
1403 if (nm
[0] == '~') /* prefix ~ */
1404 if (nm
[1] == '/' || nm
[1] == 0)/* ~/filename */
1406 if (!(newdir
= (unsigned char *) egetenv ("HOME")))
1407 newdir
= (unsigned char *) "";
1410 else /* ~user/filename */
1412 /* Get past ~ to user */
1413 unsigned char *user
= nm
+ 1;
1414 /* Find end of name. */
1415 unsigned char *ptr
= (unsigned char *) strchr (user
, '/');
1416 ptrdiff_t len
= ptr
? ptr
- user
: strlen (user
);
1417 /* Copy the user name into temp storage. */
1418 o
= (unsigned char *) alloca (len
+ 1);
1419 memcpy (o
, user
, len
);
1422 /* Look up the user name. */
1424 pw
= (struct passwd
*) getpwnam (o
+ 1);
1427 error ("\"%s\" isn't a registered user", o
+ 1);
1429 newdir
= (unsigned char *) pw
->pw_dir
;
1431 /* Discard the user name from NM. */
1435 if (nm
[0] != '/' && !newdir
)
1438 defalt
= current_buffer
->directory
;
1439 CHECK_STRING (defalt
);
1440 newdir
= SDATA (defalt
);
1443 /* Now concatenate the directory and name to new space in the stack frame */
1445 tlen
= (newdir
? strlen (newdir
) + 1 : 0) + strlen (nm
) + 1;
1446 target
= (unsigned char *) alloca (tlen
);
1451 if (nm
[0] == 0 || nm
[0] == '/')
1452 strcpy (target
, newdir
);
1454 file_name_as_directory (target
, newdir
);
1457 strcat (target
, nm
);
1459 /* Now canonicalize by removing /. and /foo/.. if they appear */
1470 else if (!strncmp (p
, "//", 2)
1476 else if (p
[0] == '/' && p
[1] == '.'
1477 && (p
[2] == '/' || p
[2] == 0))
1479 else if (!strncmp (p
, "/..", 3)
1480 /* `/../' is the "superroot" on certain file systems. */
1482 && (p
[3] == '/' || p
[3] == 0))
1484 while (o
!= target
&& *--o
!= '/')
1486 if (o
== target
&& *o
== '/')
1496 return make_string (target
, o
- target
);
1500 /* If /~ or // appears, discard everything through first slash. */
1502 file_name_absolute_p (const char *filename
)
1505 (IS_DIRECTORY_SEP (*filename
) || *filename
== '~'
1507 || (IS_DRIVE (*filename
) && IS_DEVICE_SEP (filename
[1])
1508 && IS_DIRECTORY_SEP (filename
[2]))
1514 search_embedded_absfilename (char *nm
, char *endp
)
1518 for (p
= nm
+ 1; p
< endp
; p
++)
1521 || IS_DIRECTORY_SEP (p
[-1]))
1522 && file_name_absolute_p (p
)
1523 #if defined (WINDOWSNT) || defined (CYGWIN)
1524 /* // at start of file name is meaningful in Apollo,
1525 WindowsNT and Cygwin systems. */
1526 && !(IS_DIRECTORY_SEP (p
[0]) && p
- 1 == nm
)
1527 #endif /* not (WINDOWSNT || CYGWIN) */
1530 for (s
= p
; *s
&& (!IS_DIRECTORY_SEP (*s
)); s
++);
1531 if (p
[0] == '~' && s
> p
+ 1) /* we've got "/~something/" */
1533 char *o
= alloca (s
- p
+ 1);
1535 memcpy (o
, p
, s
- p
);
1538 /* If we have ~user and `user' exists, discard
1539 everything up to ~. But if `user' does not exist, leave
1540 ~user alone, it might be a literal file name. */
1542 pw
= getpwnam (o
+ 1);
1554 DEFUN ("substitute-in-file-name", Fsubstitute_in_file_name
,
1555 Ssubstitute_in_file_name
, 1, 1, 0,
1556 doc
: /* Substitute environment variables referred to in FILENAME.
1557 `$FOO' where FOO is an environment variable name means to substitute
1558 the value of that variable. The variable name should be terminated
1559 with a character not a letter, digit or underscore; otherwise, enclose
1560 the entire variable name in braces.
1562 If `/~' appears, all of FILENAME through that `/' is discarded.
1563 If `//' appears, everything up to and including the first of
1564 those `/' is discarded. */)
1565 (Lisp_Object filename
)
1569 register char *s
, *p
, *o
, *x
, *endp
;
1570 char *target
= NULL
;
1572 int substituted
= 0;
1575 Lisp_Object handler
;
1577 CHECK_STRING (filename
);
1579 multibyte
= STRING_MULTIBYTE (filename
);
1581 /* If the file name has special constructs in it,
1582 call the corresponding file handler. */
1583 handler
= Ffind_file_name_handler (filename
, Qsubstitute_in_file_name
);
1584 if (!NILP (handler
))
1586 Lisp_Object handled_name
= call2 (handler
, Qsubstitute_in_file_name
,
1588 if (STRINGP (handled_name
))
1589 return handled_name
;
1590 error ("Invalid handler in `file-name-handler-alist'");
1593 /* Always work on a copy of the string, in case GC happens during
1594 decode of environment variables, causing the original Lisp_String
1595 data to be relocated. */
1596 nm
= (char *) alloca (SBYTES (filename
) + 1);
1597 memcpy (nm
, SDATA (filename
), SBYTES (filename
) + 1);
1600 dostounix_filename (nm
);
1601 substituted
= (strcmp (nm
, SDATA (filename
)) != 0);
1603 endp
= nm
+ SBYTES (filename
);
1605 /* If /~ or // appears, discard everything through first slash. */
1606 p
= search_embedded_absfilename (nm
, endp
);
1608 /* Start over with the new string, so we check the file-name-handler
1609 again. Important with filenames like "/home/foo//:/hello///there"
1610 which would substitute to "/:/hello///there" rather than "/there". */
1611 return Fsubstitute_in_file_name
1612 (make_specified_string (p
, -1, endp
- p
, multibyte
));
1614 /* See if any variables are substituted into the string
1615 and find the total length of their values in `total' */
1617 for (p
= nm
; p
!= endp
;)
1627 /* "$$" means a single "$" */
1636 while (p
!= endp
&& *p
!= '}') p
++;
1637 if (*p
!= '}') goto missingclose
;
1643 while (p
!= endp
&& (isalnum (*p
) || *p
== '_')) p
++;
1647 /* Copy out the variable name */
1648 target
= (char *) alloca (s
- o
+ 1);
1649 strncpy (target
, o
, s
- o
);
1652 strupr (target
); /* $home == $HOME etc. */
1655 /* Get variable value */
1656 o
= egetenv (target
);
1659 /* Don't try to guess a maximum length - UTF8 can use up to
1660 four bytes per character. This code is unlikely to run
1661 in a situation that requires performance, so decoding the
1662 env variables twice should be acceptable. Note that
1663 decoding may cause a garbage collect. */
1664 Lisp_Object orig
, decoded
;
1665 orig
= make_unibyte_string (o
, strlen (o
));
1666 decoded
= DECODE_FILE (orig
);
1667 total
+= SBYTES (decoded
);
1677 /* If substitution required, recopy the string and do it */
1678 /* Make space in stack frame for the new copy */
1679 xnm
= (char *) alloca (SBYTES (filename
) + total
+ 1);
1682 /* Copy the rest of the name through, replacing $ constructs with values */
1699 while (p
!= endp
&& *p
!= '}') p
++;
1700 if (*p
!= '}') goto missingclose
;
1706 while (p
!= endp
&& (isalnum (*p
) || *p
== '_')) p
++;
1710 /* Copy out the variable name */
1711 target
= (char *) alloca (s
- o
+ 1);
1712 strncpy (target
, o
, s
- o
);
1715 strupr (target
); /* $home == $HOME etc. */
1718 /* Get variable value */
1719 o
= egetenv (target
);
1723 strcpy (x
, target
); x
+= strlen (target
);
1727 Lisp_Object orig
, decoded
;
1728 ptrdiff_t orig_length
, decoded_length
;
1729 orig_length
= strlen (o
);
1730 orig
= make_unibyte_string (o
, orig_length
);
1731 decoded
= DECODE_FILE (orig
);
1732 decoded_length
= SBYTES (decoded
);
1733 strncpy (x
, SSDATA (decoded
), decoded_length
);
1734 x
+= decoded_length
;
1736 /* If environment variable needed decoding, return value
1737 needs to be multibyte. */
1738 if (decoded_length
!= orig_length
1739 || strncmp (SSDATA (decoded
), o
, orig_length
))
1746 /* If /~ or // appears, discard everything through first slash. */
1747 while ((p
= search_embedded_absfilename (xnm
, x
)))
1748 /* This time we do not start over because we've already expanded envvars
1749 and replaced $$ with $. Maybe we should start over as well, but we'd
1750 need to quote some $ to $$ first. */
1753 return make_specified_string (xnm
, -1, x
- xnm
, multibyte
);
1756 error ("Bad format environment-variable substitution");
1758 error ("Missing \"}\" in environment-variable substitution");
1760 error ("Substituting nonexistent environment variable \"%s\"", target
);
1766 /* A slightly faster and more convenient way to get
1767 (directory-file-name (expand-file-name FOO)). */
1770 expand_and_dir_to_file (Lisp_Object filename
, Lisp_Object defdir
)
1772 register Lisp_Object absname
;
1774 absname
= Fexpand_file_name (filename
, defdir
);
1776 /* Remove final slash, if any (unless this is the root dir).
1777 stat behaves differently depending! */
1778 if (SCHARS (absname
) > 1
1779 && IS_DIRECTORY_SEP (SREF (absname
, SBYTES (absname
) - 1))
1780 && !IS_DEVICE_SEP (SREF (absname
, SBYTES (absname
)-2)))
1781 /* We cannot take shortcuts; they might be wrong for magic file names. */
1782 absname
= Fdirectory_file_name (absname
);
1786 /* Signal an error if the file ABSNAME already exists.
1787 If INTERACTIVE is nonzero, ask the user whether to proceed,
1788 and bypass the error if the user says to go ahead.
1789 QUERYSTRING is a name for the action that is being considered
1792 *STATPTR is used to store the stat information if the file exists.
1793 If the file does not exist, STATPTR->st_mode is set to 0.
1794 If STATPTR is null, we don't store into it.
1796 If QUICK is nonzero, we ask for y or n, not yes or no. */
1799 barf_or_query_if_file_exists (Lisp_Object absname
, const char *querystring
,
1800 int interactive
, struct stat
*statptr
, int quick
)
1802 register Lisp_Object tem
, encoded_filename
;
1803 struct stat statbuf
;
1804 struct gcpro gcpro1
;
1806 encoded_filename
= ENCODE_FILE (absname
);
1808 /* stat is a good way to tell whether the file exists,
1809 regardless of what access permissions it has. */
1810 if (lstat (SSDATA (encoded_filename
), &statbuf
) >= 0)
1812 if (S_ISDIR (statbuf
.st_mode
))
1813 xsignal2 (Qfile_error
,
1814 build_string ("File is a directory"), absname
);
1817 xsignal2 (Qfile_already_exists
,
1818 build_string ("File already exists"), absname
);
1820 tem
= format2 ("File %s already exists; %s anyway? ",
1821 absname
, build_string (querystring
));
1823 tem
= call1 (intern ("y-or-n-p"), tem
);
1825 tem
= do_yes_or_no_p (tem
);
1828 xsignal2 (Qfile_already_exists
,
1829 build_string ("File already exists"), absname
);
1836 statptr
->st_mode
= 0;
1841 DEFUN ("copy-file", Fcopy_file
, Scopy_file
, 2, 6,
1842 "fCopy file: \nGCopy %s to file: \np\nP",
1843 doc
: /* Copy FILE to NEWNAME. Both args must be strings.
1844 If NEWNAME names a directory, copy FILE there.
1846 This function always sets the file modes of the output file to match
1849 The optional third argument OK-IF-ALREADY-EXISTS specifies what to do
1850 if file NEWNAME already exists. If OK-IF-ALREADY-EXISTS is nil, we
1851 signal a `file-already-exists' error without overwriting. If
1852 OK-IF-ALREADY-EXISTS is a number, we request confirmation from the user
1853 about overwriting; this is what happens in interactive use with M-x.
1854 Any other value for OK-IF-ALREADY-EXISTS means to overwrite the
1857 Fourth arg KEEP-TIME non-nil means give the output file the same
1858 last-modified time as the old one. (This works on only some systems.)
1860 A prefix arg makes KEEP-TIME non-nil.
1862 If PRESERVE-UID-GID is non-nil, we try to transfer the
1863 uid and gid of FILE to NEWNAME.
1865 If PRESERVE-SELINUX-CONTEXT is non-nil and SELinux is enabled
1866 on the system, we copy the SELinux context of FILE to NEWNAME. */)
1867 (Lisp_Object file
, Lisp_Object newname
, Lisp_Object ok_if_already_exists
, Lisp_Object keep_time
, Lisp_Object preserve_uid_gid
, Lisp_Object preserve_selinux_context
)
1871 char buf
[16 * 1024];
1872 struct stat st
, out_st
;
1873 Lisp_Object handler
;
1874 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
1875 int count
= SPECPDL_INDEX ();
1876 int input_file_statable_p
;
1877 Lisp_Object encoded_file
, encoded_newname
;
1879 security_context_t con
;
1880 int fail
, conlength
= 0;
1883 encoded_file
= encoded_newname
= Qnil
;
1884 GCPRO4 (file
, newname
, encoded_file
, encoded_newname
);
1885 CHECK_STRING (file
);
1886 CHECK_STRING (newname
);
1888 if (!NILP (Ffile_directory_p (newname
)))
1889 newname
= Fexpand_file_name (Ffile_name_nondirectory (file
), newname
);
1891 newname
= Fexpand_file_name (newname
, Qnil
);
1893 file
= Fexpand_file_name (file
, Qnil
);
1895 /* If the input file name has special constructs in it,
1896 call the corresponding file handler. */
1897 handler
= Ffind_file_name_handler (file
, Qcopy_file
);
1898 /* Likewise for output file name. */
1900 handler
= Ffind_file_name_handler (newname
, Qcopy_file
);
1901 if (!NILP (handler
))
1902 RETURN_UNGCPRO (call7 (handler
, Qcopy_file
, file
, newname
,
1903 ok_if_already_exists
, keep_time
, preserve_uid_gid
,
1904 preserve_selinux_context
));
1906 encoded_file
= ENCODE_FILE (file
);
1907 encoded_newname
= ENCODE_FILE (newname
);
1909 if (NILP (ok_if_already_exists
)
1910 || INTEGERP (ok_if_already_exists
))
1911 barf_or_query_if_file_exists (newname
, "copy to it",
1912 INTEGERP (ok_if_already_exists
), &out_st
, 0);
1913 else if (stat (SSDATA (encoded_newname
), &out_st
) < 0)
1917 if (!CopyFile (SDATA (encoded_file
),
1918 SDATA (encoded_newname
),
1920 report_file_error ("Copying file", Fcons (file
, Fcons (newname
, Qnil
)));
1921 /* CopyFile retains the timestamp by default. */
1922 else if (NILP (keep_time
))
1928 EMACS_GET_TIME (now
);
1929 filename
= SDATA (encoded_newname
);
1931 /* Ensure file is writable while its modified time is set. */
1932 attributes
= GetFileAttributes (filename
);
1933 SetFileAttributes (filename
, attributes
& ~FILE_ATTRIBUTE_READONLY
);
1934 if (set_file_times (filename
, now
, now
))
1936 /* Restore original attributes. */
1937 SetFileAttributes (filename
, attributes
);
1938 xsignal2 (Qfile_date_error
,
1939 build_string ("Cannot set file date"), newname
);
1941 /* Restore original attributes. */
1942 SetFileAttributes (filename
, attributes
);
1944 #else /* not WINDOWSNT */
1946 ifd
= emacs_open (SSDATA (encoded_file
), O_RDONLY
, 0);
1950 report_file_error ("Opening input file", Fcons (file
, Qnil
));
1952 record_unwind_protect (close_file_unwind
, make_number (ifd
));
1954 /* We can only copy regular files and symbolic links. Other files are not
1956 input_file_statable_p
= (fstat (ifd
, &st
) >= 0);
1959 if (!NILP (preserve_selinux_context
) && is_selinux_enabled ())
1961 conlength
= fgetfilecon (ifd
, &con
);
1962 if (conlength
== -1)
1963 report_file_error ("Doing fgetfilecon", Fcons (file
, Qnil
));
1967 if (out_st
.st_mode
!= 0
1968 && st
.st_dev
== out_st
.st_dev
&& st
.st_ino
== out_st
.st_ino
)
1971 report_file_error ("Input and output files are the same",
1972 Fcons (file
, Fcons (newname
, Qnil
)));
1975 if (input_file_statable_p
)
1977 if (!(S_ISREG (st
.st_mode
)) && !(S_ISLNK (st
.st_mode
)))
1979 #if defined (EISDIR)
1980 /* Get a better looking error message. */
1983 report_file_error ("Non-regular file", Fcons (file
, Qnil
));
1988 /* System's default file type was set to binary by _fmode in emacs.c. */
1989 ofd
= emacs_open (SDATA (encoded_newname
),
1990 O_WRONLY
| O_TRUNC
| O_CREAT
1991 | (NILP (ok_if_already_exists
) ? O_EXCL
: 0),
1992 S_IREAD
| S_IWRITE
);
1993 #else /* not MSDOS */
1995 int new_mask
= 0666;
1996 if (input_file_statable_p
)
1998 if (!NILP (preserve_uid_gid
))
2000 new_mask
&= st
.st_mode
;
2002 ofd
= emacs_open (SSDATA (encoded_newname
),
2003 (O_WRONLY
| O_TRUNC
| O_CREAT
2004 | (NILP (ok_if_already_exists
) ? O_EXCL
: 0)),
2007 #endif /* not MSDOS */
2009 report_file_error ("Opening output file", Fcons (newname
, Qnil
));
2011 record_unwind_protect (close_file_unwind
, make_number (ofd
));
2015 while ((n
= emacs_read (ifd
, buf
, sizeof buf
)) > 0)
2016 if (emacs_write (ofd
, buf
, n
) != n
)
2017 report_file_error ("I/O error", Fcons (newname
, Qnil
));
2021 /* Preserve the original file modes, and if requested, also its
2023 if (input_file_statable_p
)
2025 int mode_mask
= 07777;
2026 if (!NILP (preserve_uid_gid
))
2028 /* Attempt to change owner and group. If that doesn't work
2029 attempt to change just the group, as that is sometimes allowed.
2030 Adjust the mode mask to eliminate setuid or setgid bits
2031 that are inappropriate if the owner and group are wrong. */
2032 if (fchown (ofd
, st
.st_uid
, st
.st_gid
) != 0)
2034 mode_mask
&= ~06000;
2035 if (fchown (ofd
, -1, st
.st_gid
) == 0)
2039 if (fchmod (ofd
, st
.st_mode
& mode_mask
) != 0)
2040 report_file_error ("Doing chmod", Fcons (newname
, Qnil
));
2042 #endif /* not MSDOS */
2047 /* Set the modified context back to the file. */
2048 fail
= fsetfilecon (ofd
, con
);
2050 report_file_error ("Doing fsetfilecon", Fcons (newname
, Qnil
));
2056 /* Closing the output clobbers the file times on some systems. */
2057 if (emacs_close (ofd
) < 0)
2058 report_file_error ("I/O error", Fcons (newname
, Qnil
));
2060 if (input_file_statable_p
)
2062 if (!NILP (keep_time
))
2064 EMACS_TIME atime
, mtime
;
2065 EMACS_SET_SECS_USECS (atime
, st
.st_atime
, 0);
2066 EMACS_SET_SECS_USECS (mtime
, st
.st_mtime
, 0);
2067 if (set_file_times (SSDATA (encoded_newname
),
2069 xsignal2 (Qfile_date_error
,
2070 build_string ("Cannot set file date"), newname
);
2077 if (input_file_statable_p
)
2079 /* In DJGPP v2.0 and later, fstat usually returns true file mode bits,
2080 and if it can't, it tells so. Otherwise, under MSDOS we usually
2081 get only the READ bit, which will make the copied file read-only,
2082 so it's better not to chmod at all. */
2083 if ((_djstat_flags
& _STFAIL_WRITEBIT
) == 0)
2084 chmod (SDATA (encoded_newname
), st
.st_mode
& 07777);
2087 #endif /* not WINDOWSNT */
2089 /* Discard the unwind protects. */
2090 specpdl_ptr
= specpdl
+ count
;
2096 DEFUN ("make-directory-internal", Fmake_directory_internal
,
2097 Smake_directory_internal
, 1, 1, 0,
2098 doc
: /* Create a new directory named DIRECTORY. */)
2099 (Lisp_Object directory
)
2102 Lisp_Object handler
;
2103 Lisp_Object encoded_dir
;
2105 CHECK_STRING (directory
);
2106 directory
= Fexpand_file_name (directory
, Qnil
);
2108 handler
= Ffind_file_name_handler (directory
, Qmake_directory_internal
);
2109 if (!NILP (handler
))
2110 return call2 (handler
, Qmake_directory_internal
, directory
);
2112 encoded_dir
= ENCODE_FILE (directory
);
2114 dir
= SSDATA (encoded_dir
);
2117 if (mkdir (dir
) != 0)
2119 if (mkdir (dir
, 0777 & ~auto_saving_dir_umask
) != 0)
2121 report_file_error ("Creating directory", list1 (directory
));
2126 DEFUN ("delete-directory-internal", Fdelete_directory_internal
,
2127 Sdelete_directory_internal
, 1, 1, 0,
2128 doc
: /* Delete the directory named DIRECTORY. Does not follow symlinks. */)
2129 (Lisp_Object directory
)
2132 Lisp_Object encoded_dir
;
2134 CHECK_STRING (directory
);
2135 directory
= Fdirectory_file_name (Fexpand_file_name (directory
, Qnil
));
2136 encoded_dir
= ENCODE_FILE (directory
);
2137 dir
= SSDATA (encoded_dir
);
2139 if (rmdir (dir
) != 0)
2140 report_file_error ("Removing directory", list1 (directory
));
2145 DEFUN ("delete-file", Fdelete_file
, Sdelete_file
, 1, 2,
2146 "(list (read-file-name \
2147 (if (and delete-by-moving-to-trash (null current-prefix-arg)) \
2148 \"Move file to trash: \" \"Delete file: \") \
2149 nil default-directory (confirm-nonexistent-file-or-buffer)) \
2150 (null current-prefix-arg))",
2151 doc
: /* Delete file named FILENAME. If it is a symlink, remove the symlink.
2152 If file has multiple names, it continues to exist with the other names.
2153 TRASH non-nil means to trash the file instead of deleting, provided
2154 `delete-by-moving-to-trash' is non-nil.
2156 When called interactively, TRASH is t if no prefix argument is given.
2157 With a prefix argument, TRASH is nil. */)
2158 (Lisp_Object filename
, Lisp_Object trash
)
2160 Lisp_Object handler
;
2161 Lisp_Object encoded_file
;
2162 struct gcpro gcpro1
;
2165 if (!NILP (Ffile_directory_p (filename
))
2166 && NILP (Ffile_symlink_p (filename
)))
2167 xsignal2 (Qfile_error
,
2168 build_string ("Removing old name: is a directory"),
2171 filename
= Fexpand_file_name (filename
, Qnil
);
2173 handler
= Ffind_file_name_handler (filename
, Qdelete_file
);
2174 if (!NILP (handler
))
2175 return call3 (handler
, Qdelete_file
, filename
, trash
);
2177 if (delete_by_moving_to_trash
&& !NILP (trash
))
2178 return call1 (Qmove_file_to_trash
, filename
);
2180 encoded_file
= ENCODE_FILE (filename
);
2182 if (0 > unlink (SSDATA (encoded_file
)))
2183 report_file_error ("Removing old name", list1 (filename
));
2188 internal_delete_file_1 (Lisp_Object ignore
)
2193 /* Delete file FILENAME, returning 1 if successful and 0 if failed.
2194 This ignores `delete-by-moving-to-trash'. */
2197 internal_delete_file (Lisp_Object filename
)
2201 tem
= internal_condition_case_2 (Fdelete_file
, filename
, Qnil
,
2202 Qt
, internal_delete_file_1
);
2206 DEFUN ("rename-file", Frename_file
, Srename_file
, 2, 3,
2207 "fRename file: \nGRename %s to file: \np",
2208 doc
: /* Rename FILE as NEWNAME. Both args must be strings.
2209 If file has names other than FILE, it continues to have those names.
2210 Signals a `file-already-exists' error if a file NEWNAME already exists
2211 unless optional third argument OK-IF-ALREADY-EXISTS is non-nil.
2212 A number as third arg means request confirmation if NEWNAME already exists.
2213 This is what happens in interactive use with M-x. */)
2214 (Lisp_Object file
, Lisp_Object newname
, Lisp_Object ok_if_already_exists
)
2216 Lisp_Object handler
;
2217 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
, gcpro5
;
2218 Lisp_Object encoded_file
, encoded_newname
, symlink_target
;
2220 symlink_target
= encoded_file
= encoded_newname
= Qnil
;
2221 GCPRO5 (file
, newname
, encoded_file
, encoded_newname
, symlink_target
);
2222 CHECK_STRING (file
);
2223 CHECK_STRING (newname
);
2224 file
= Fexpand_file_name (file
, Qnil
);
2226 if ((!NILP (Ffile_directory_p (newname
)))
2228 /* If the file names are identical but for the case,
2229 don't attempt to move directory to itself. */
2230 && (NILP (Fstring_equal (Fdowncase (file
), Fdowncase (newname
))))
2234 Lisp_Object fname
= NILP (Ffile_directory_p (file
))
2235 ? file
: Fdirectory_file_name (file
);
2236 newname
= Fexpand_file_name (Ffile_name_nondirectory (fname
), newname
);
2239 newname
= Fexpand_file_name (newname
, Qnil
);
2241 /* If the file name has special constructs in it,
2242 call the corresponding file handler. */
2243 handler
= Ffind_file_name_handler (file
, Qrename_file
);
2245 handler
= Ffind_file_name_handler (newname
, Qrename_file
);
2246 if (!NILP (handler
))
2247 RETURN_UNGCPRO (call4 (handler
, Qrename_file
,
2248 file
, newname
, ok_if_already_exists
));
2250 encoded_file
= ENCODE_FILE (file
);
2251 encoded_newname
= ENCODE_FILE (newname
);
2254 /* If the file names are identical but for the case, don't ask for
2255 confirmation: they simply want to change the letter-case of the
2257 if (NILP (Fstring_equal (Fdowncase (file
), Fdowncase (newname
))))
2259 if (NILP (ok_if_already_exists
)
2260 || INTEGERP (ok_if_already_exists
))
2261 barf_or_query_if_file_exists (newname
, "rename to it",
2262 INTEGERP (ok_if_already_exists
), 0, 0);
2263 if (0 > rename (SSDATA (encoded_file
), SSDATA (encoded_newname
)))
2268 symlink_target
= Ffile_symlink_p (file
);
2269 if (! NILP (symlink_target
))
2270 Fmake_symbolic_link (symlink_target
, newname
,
2271 NILP (ok_if_already_exists
) ? Qnil
: Qt
);
2272 else if (!NILP (Ffile_directory_p (file
)))
2273 call4 (Qcopy_directory
, file
, newname
, Qt
, Qnil
);
2275 /* We have already prompted if it was an integer, so don't
2276 have copy-file prompt again. */
2277 Fcopy_file (file
, newname
,
2278 NILP (ok_if_already_exists
) ? Qnil
: Qt
,
2281 count
= SPECPDL_INDEX ();
2282 specbind (Qdelete_by_moving_to_trash
, Qnil
);
2284 if (!NILP (Ffile_directory_p (file
)) && NILP (symlink_target
))
2285 call2 (Qdelete_directory
, file
, Qt
);
2287 Fdelete_file (file
, Qnil
);
2288 unbind_to (count
, Qnil
);
2291 report_file_error ("Renaming", list2 (file
, newname
));
2297 DEFUN ("add-name-to-file", Fadd_name_to_file
, Sadd_name_to_file
, 2, 3,
2298 "fAdd name to file: \nGName to add to %s: \np",
2299 doc
: /* Give FILE additional name NEWNAME. Both args must be strings.
2300 Signals a `file-already-exists' error if a file NEWNAME already exists
2301 unless optional third argument OK-IF-ALREADY-EXISTS is non-nil.
2302 A number as third arg means request confirmation if NEWNAME already exists.
2303 This is what happens in interactive use with M-x. */)
2304 (Lisp_Object file
, Lisp_Object newname
, Lisp_Object ok_if_already_exists
)
2306 Lisp_Object handler
;
2307 Lisp_Object encoded_file
, encoded_newname
;
2308 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
2310 GCPRO4 (file
, newname
, encoded_file
, encoded_newname
);
2311 encoded_file
= encoded_newname
= Qnil
;
2312 CHECK_STRING (file
);
2313 CHECK_STRING (newname
);
2314 file
= Fexpand_file_name (file
, Qnil
);
2316 if (!NILP (Ffile_directory_p (newname
)))
2317 newname
= Fexpand_file_name (Ffile_name_nondirectory (file
), newname
);
2319 newname
= Fexpand_file_name (newname
, Qnil
);
2321 /* If the file name has special constructs in it,
2322 call the corresponding file handler. */
2323 handler
= Ffind_file_name_handler (file
, Qadd_name_to_file
);
2324 if (!NILP (handler
))
2325 RETURN_UNGCPRO (call4 (handler
, Qadd_name_to_file
, file
,
2326 newname
, ok_if_already_exists
));
2328 /* If the new name has special constructs in it,
2329 call the corresponding file handler. */
2330 handler
= Ffind_file_name_handler (newname
, Qadd_name_to_file
);
2331 if (!NILP (handler
))
2332 RETURN_UNGCPRO (call4 (handler
, Qadd_name_to_file
, file
,
2333 newname
, ok_if_already_exists
));
2335 encoded_file
= ENCODE_FILE (file
);
2336 encoded_newname
= ENCODE_FILE (newname
);
2338 if (NILP (ok_if_already_exists
)
2339 || INTEGERP (ok_if_already_exists
))
2340 barf_or_query_if_file_exists (newname
, "make it a new name",
2341 INTEGERP (ok_if_already_exists
), 0, 0);
2343 unlink (SSDATA (newname
));
2344 if (0 > link (SSDATA (encoded_file
), SSDATA (encoded_newname
)))
2345 report_file_error ("Adding new name", list2 (file
, newname
));
2351 DEFUN ("make-symbolic-link", Fmake_symbolic_link
, Smake_symbolic_link
, 2, 3,
2352 "FMake symbolic link to file: \nGMake symbolic link to file %s: \np",
2353 doc
: /* Make a symbolic link to FILENAME, named LINKNAME.
2354 Both args must be strings.
2355 Signals a `file-already-exists' error if a file LINKNAME already exists
2356 unless optional third argument OK-IF-ALREADY-EXISTS is non-nil.
2357 A number as third arg means request confirmation if LINKNAME already exists.
2358 This happens for interactive use with M-x. */)
2359 (Lisp_Object filename
, Lisp_Object linkname
, Lisp_Object ok_if_already_exists
)
2361 Lisp_Object handler
;
2362 Lisp_Object encoded_filename
, encoded_linkname
;
2363 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
2365 GCPRO4 (filename
, linkname
, encoded_filename
, encoded_linkname
);
2366 encoded_filename
= encoded_linkname
= Qnil
;
2367 CHECK_STRING (filename
);
2368 CHECK_STRING (linkname
);
2369 /* If the link target has a ~, we must expand it to get
2370 a truly valid file name. Otherwise, do not expand;
2371 we want to permit links to relative file names. */
2372 if (SREF (filename
, 0) == '~')
2373 filename
= Fexpand_file_name (filename
, Qnil
);
2375 if (!NILP (Ffile_directory_p (linkname
)))
2376 linkname
= Fexpand_file_name (Ffile_name_nondirectory (filename
), linkname
);
2378 linkname
= Fexpand_file_name (linkname
, Qnil
);
2380 /* If the file name has special constructs in it,
2381 call the corresponding file handler. */
2382 handler
= Ffind_file_name_handler (filename
, Qmake_symbolic_link
);
2383 if (!NILP (handler
))
2384 RETURN_UNGCPRO (call4 (handler
, Qmake_symbolic_link
, filename
,
2385 linkname
, ok_if_already_exists
));
2387 /* If the new link name has special constructs in it,
2388 call the corresponding file handler. */
2389 handler
= Ffind_file_name_handler (linkname
, Qmake_symbolic_link
);
2390 if (!NILP (handler
))
2391 RETURN_UNGCPRO (call4 (handler
, Qmake_symbolic_link
, filename
,
2392 linkname
, ok_if_already_exists
));
2394 encoded_filename
= ENCODE_FILE (filename
);
2395 encoded_linkname
= ENCODE_FILE (linkname
);
2397 if (NILP (ok_if_already_exists
)
2398 || INTEGERP (ok_if_already_exists
))
2399 barf_or_query_if_file_exists (linkname
, "make it a link",
2400 INTEGERP (ok_if_already_exists
), 0, 0);
2401 if (0 > symlink (SSDATA (encoded_filename
),
2402 SSDATA (encoded_linkname
)))
2404 /* If we didn't complain already, silently delete existing file. */
2405 if (errno
== EEXIST
)
2407 unlink (SSDATA (encoded_linkname
));
2408 if (0 <= symlink (SSDATA (encoded_filename
),
2409 SSDATA (encoded_linkname
)))
2415 if (errno
== ENOSYS
)
2418 xsignal1 (Qfile_error
,
2419 build_string ("Symbolic links are not supported"));
2422 report_file_error ("Making symbolic link", list2 (filename
, linkname
));
2429 DEFUN ("file-name-absolute-p", Ffile_name_absolute_p
, Sfile_name_absolute_p
,
2431 doc
: /* Return t if file FILENAME specifies an absolute file name.
2432 On Unix, this is a name starting with a `/' or a `~'. */)
2433 (Lisp_Object filename
)
2435 CHECK_STRING (filename
);
2436 return file_name_absolute_p (SSDATA (filename
)) ? Qt
: Qnil
;
2439 /* Return nonzero if file FILENAME exists and can be executed. */
2442 check_executable (char *filename
)
2446 if (stat (filename
, &st
) < 0)
2448 return ((st
.st_mode
& S_IEXEC
) != 0);
2449 #else /* not DOS_NT */
2450 #ifdef HAVE_EUIDACCESS
2451 return (euidaccess (filename
, 1) >= 0);
2453 /* Access isn't quite right because it uses the real uid
2454 and we really want to test with the effective uid.
2455 But Unix doesn't give us a right way to do it. */
2456 return (access (filename
, 1) >= 0);
2458 #endif /* not DOS_NT */
2461 /* Return nonzero if file FILENAME exists and can be written. */
2464 check_writable (const char *filename
)
2468 if (stat (filename
, &st
) < 0)
2470 return (st
.st_mode
& S_IWRITE
|| S_ISDIR (st
.st_mode
));
2471 #else /* not MSDOS */
2472 #ifdef HAVE_EUIDACCESS
2473 int res
= (euidaccess (filename
, 2) >= 0);
2475 /* euidaccess may have returned failure because Cygwin couldn't
2476 determine the file's UID or GID; if so, we return success. */
2480 if (stat (filename
, &st
) < 0)
2482 res
= (st
.st_uid
== -1 || st
.st_gid
== -1);
2486 #else /* not HAVE_EUIDACCESS */
2487 /* Access isn't quite right because it uses the real uid
2488 and we really want to test with the effective uid.
2489 But Unix doesn't give us a right way to do it.
2490 Opening with O_WRONLY could work for an ordinary file,
2491 but would lose for directories. */
2492 return (access (filename
, 2) >= 0);
2493 #endif /* not HAVE_EUIDACCESS */
2494 #endif /* not MSDOS */
2497 DEFUN ("file-exists-p", Ffile_exists_p
, Sfile_exists_p
, 1, 1, 0,
2498 doc
: /* Return t if file FILENAME exists (whether or not you can read it.)
2499 See also `file-readable-p' and `file-attributes'.
2500 This returns nil for a symlink to a nonexistent file.
2501 Use `file-symlink-p' to test for such links. */)
2502 (Lisp_Object filename
)
2504 Lisp_Object absname
;
2505 Lisp_Object handler
;
2506 struct stat statbuf
;
2508 CHECK_STRING (filename
);
2509 absname
= Fexpand_file_name (filename
, Qnil
);
2511 /* If the file name has special constructs in it,
2512 call the corresponding file handler. */
2513 handler
= Ffind_file_name_handler (absname
, Qfile_exists_p
);
2514 if (!NILP (handler
))
2515 return call2 (handler
, Qfile_exists_p
, absname
);
2517 absname
= ENCODE_FILE (absname
);
2519 return (stat (SSDATA (absname
), &statbuf
) >= 0) ? Qt
: Qnil
;
2522 DEFUN ("file-executable-p", Ffile_executable_p
, Sfile_executable_p
, 1, 1, 0,
2523 doc
: /* Return t if FILENAME can be executed by you.
2524 For a directory, this means you can access files in that directory. */)
2525 (Lisp_Object filename
)
2527 Lisp_Object absname
;
2528 Lisp_Object handler
;
2530 CHECK_STRING (filename
);
2531 absname
= Fexpand_file_name (filename
, Qnil
);
2533 /* If the file name has special constructs in it,
2534 call the corresponding file handler. */
2535 handler
= Ffind_file_name_handler (absname
, Qfile_executable_p
);
2536 if (!NILP (handler
))
2537 return call2 (handler
, Qfile_executable_p
, absname
);
2539 absname
= ENCODE_FILE (absname
);
2541 return (check_executable (SSDATA (absname
)) ? Qt
: Qnil
);
2544 DEFUN ("file-readable-p", Ffile_readable_p
, Sfile_readable_p
, 1, 1, 0,
2545 doc
: /* Return t if file FILENAME exists and you can read it.
2546 See also `file-exists-p' and `file-attributes'. */)
2547 (Lisp_Object filename
)
2549 Lisp_Object absname
;
2550 Lisp_Object handler
;
2553 struct stat statbuf
;
2555 CHECK_STRING (filename
);
2556 absname
= Fexpand_file_name (filename
, Qnil
);
2558 /* If the file name has special constructs in it,
2559 call the corresponding file handler. */
2560 handler
= Ffind_file_name_handler (absname
, Qfile_readable_p
);
2561 if (!NILP (handler
))
2562 return call2 (handler
, Qfile_readable_p
, absname
);
2564 absname
= ENCODE_FILE (absname
);
2566 #if defined (DOS_NT) || defined (macintosh)
2567 /* Under MS-DOS, Windows, and Macintosh, open does not work for
2569 if (access (SDATA (absname
), 0) == 0)
2572 #else /* not DOS_NT and not macintosh */
2575 /* Opening a fifo without O_NONBLOCK can wait.
2576 We don't want to wait. But we don't want to mess wth O_NONBLOCK
2577 except in the case of a fifo, on a system which handles it. */
2578 desc
= stat (SSDATA (absname
), &statbuf
);
2581 if (S_ISFIFO (statbuf
.st_mode
))
2582 flags
|= O_NONBLOCK
;
2584 desc
= emacs_open (SSDATA (absname
), flags
, 0);
2589 #endif /* not DOS_NT and not macintosh */
2592 /* Having this before file-symlink-p mysteriously caused it to be forgotten
2594 DEFUN ("file-writable-p", Ffile_writable_p
, Sfile_writable_p
, 1, 1, 0,
2595 doc
: /* Return t if file FILENAME can be written or created by you. */)
2596 (Lisp_Object filename
)
2598 Lisp_Object absname
, dir
, encoded
;
2599 Lisp_Object handler
;
2600 struct stat statbuf
;
2602 CHECK_STRING (filename
);
2603 absname
= Fexpand_file_name (filename
, Qnil
);
2605 /* If the file name has special constructs in it,
2606 call the corresponding file handler. */
2607 handler
= Ffind_file_name_handler (absname
, Qfile_writable_p
);
2608 if (!NILP (handler
))
2609 return call2 (handler
, Qfile_writable_p
, absname
);
2611 encoded
= ENCODE_FILE (absname
);
2612 if (stat (SSDATA (encoded
), &statbuf
) >= 0)
2613 return (check_writable (SSDATA (encoded
))
2616 dir
= Ffile_name_directory (absname
);
2619 dir
= Fdirectory_file_name (dir
);
2622 dir
= ENCODE_FILE (dir
);
2624 /* The read-only attribute of the parent directory doesn't affect
2625 whether a file or directory can be created within it. Some day we
2626 should check ACLs though, which do affect this. */
2627 if (stat (SDATA (dir
), &statbuf
) < 0)
2629 return S_ISDIR (statbuf
.st_mode
) ? Qt
: Qnil
;
2631 return (check_writable (!NILP (dir
) ? SSDATA (dir
) : "")
2636 DEFUN ("access-file", Faccess_file
, Saccess_file
, 2, 2, 0,
2637 doc
: /* Access file FILENAME, and get an error if that does not work.
2638 The second argument STRING is used in the error message.
2639 If there is no error, returns nil. */)
2640 (Lisp_Object filename
, Lisp_Object string
)
2642 Lisp_Object handler
, encoded_filename
, absname
;
2645 CHECK_STRING (filename
);
2646 absname
= Fexpand_file_name (filename
, Qnil
);
2648 CHECK_STRING (string
);
2650 /* If the file name has special constructs in it,
2651 call the corresponding file handler. */
2652 handler
= Ffind_file_name_handler (absname
, Qaccess_file
);
2653 if (!NILP (handler
))
2654 return call3 (handler
, Qaccess_file
, absname
, string
);
2656 encoded_filename
= ENCODE_FILE (absname
);
2658 fd
= emacs_open (SSDATA (encoded_filename
), O_RDONLY
, 0);
2660 report_file_error (SSDATA (string
), Fcons (filename
, Qnil
));
2666 DEFUN ("file-symlink-p", Ffile_symlink_p
, Sfile_symlink_p
, 1, 1, 0,
2667 doc
: /* Return non-nil if file FILENAME is the name of a symbolic link.
2668 The value is the link target, as a string.
2669 Otherwise it returns nil.
2671 This function returns t when given the name of a symlink that
2672 points to a nonexistent file. */)
2673 (Lisp_Object filename
)
2675 Lisp_Object handler
;
2678 char readlink_buf
[READLINK_BUFSIZE
];
2680 CHECK_STRING (filename
);
2681 filename
= Fexpand_file_name (filename
, Qnil
);
2683 /* If the file name has special constructs in it,
2684 call the corresponding file handler. */
2685 handler
= Ffind_file_name_handler (filename
, Qfile_symlink_p
);
2686 if (!NILP (handler
))
2687 return call2 (handler
, Qfile_symlink_p
, filename
);
2689 filename
= ENCODE_FILE (filename
);
2691 buf
= emacs_readlink (SSDATA (filename
), readlink_buf
);
2695 val
= build_string (buf
);
2696 if (buf
[0] == '/' && strchr (buf
, ':'))
2697 val
= concat2 (build_string ("/:"), val
);
2698 if (buf
!= readlink_buf
)
2700 val
= DECODE_FILE (val
);
2704 DEFUN ("file-directory-p", Ffile_directory_p
, Sfile_directory_p
, 1, 1, 0,
2705 doc
: /* Return t if FILENAME names an existing directory.
2706 Symbolic links to directories count as directories.
2707 See `file-symlink-p' to distinguish symlinks. */)
2708 (Lisp_Object filename
)
2710 register Lisp_Object absname
;
2712 Lisp_Object handler
;
2714 absname
= expand_and_dir_to_file (filename
, BVAR (current_buffer
, directory
));
2716 /* If the file name has special constructs in it,
2717 call the corresponding file handler. */
2718 handler
= Ffind_file_name_handler (absname
, Qfile_directory_p
);
2719 if (!NILP (handler
))
2720 return call2 (handler
, Qfile_directory_p
, absname
);
2722 absname
= ENCODE_FILE (absname
);
2724 if (stat (SSDATA (absname
), &st
) < 0)
2726 return S_ISDIR (st
.st_mode
) ? Qt
: Qnil
;
2729 DEFUN ("file-accessible-directory-p", Ffile_accessible_directory_p
,
2730 Sfile_accessible_directory_p
, 1, 1, 0,
2731 doc
: /* Return t if file FILENAME names a directory you can open.
2732 For the value to be t, FILENAME must specify the name of a directory as a file,
2733 and the directory must allow you to open files in it. In order to use a
2734 directory as a buffer's current directory, this predicate must return true.
2735 A directory name spec may be given instead; then the value is t
2736 if the directory so specified exists and really is a readable and
2737 searchable directory. */)
2738 (Lisp_Object filename
)
2740 Lisp_Object handler
;
2742 struct gcpro gcpro1
;
2744 /* If the file name has special constructs in it,
2745 call the corresponding file handler. */
2746 handler
= Ffind_file_name_handler (filename
, Qfile_accessible_directory_p
);
2747 if (!NILP (handler
))
2748 return call2 (handler
, Qfile_accessible_directory_p
, filename
);
2751 tem
= (NILP (Ffile_directory_p (filename
))
2752 || NILP (Ffile_executable_p (filename
)));
2754 return tem
? Qnil
: Qt
;
2757 DEFUN ("file-regular-p", Ffile_regular_p
, Sfile_regular_p
, 1, 1, 0,
2758 doc
: /* Return t if FILENAME names a regular file.
2759 This is the sort of file that holds an ordinary stream of data bytes.
2760 Symbolic links to regular files count as regular files.
2761 See `file-symlink-p' to distinguish symlinks. */)
2762 (Lisp_Object filename
)
2764 register Lisp_Object absname
;
2766 Lisp_Object handler
;
2768 absname
= expand_and_dir_to_file (filename
, BVAR (current_buffer
, directory
));
2770 /* If the file name has special constructs in it,
2771 call the corresponding file handler. */
2772 handler
= Ffind_file_name_handler (absname
, Qfile_regular_p
);
2773 if (!NILP (handler
))
2774 return call2 (handler
, Qfile_regular_p
, absname
);
2776 absname
= ENCODE_FILE (absname
);
2781 Lisp_Object tem
= Vw32_get_true_file_attributes
;
2783 /* Tell stat to use expensive method to get accurate info. */
2784 Vw32_get_true_file_attributes
= Qt
;
2785 result
= stat (SDATA (absname
), &st
);
2786 Vw32_get_true_file_attributes
= tem
;
2790 return S_ISREG (st
.st_mode
) ? Qt
: Qnil
;
2793 if (stat (SSDATA (absname
), &st
) < 0)
2795 return S_ISREG (st
.st_mode
) ? Qt
: Qnil
;
2799 DEFUN ("file-selinux-context", Ffile_selinux_context
,
2800 Sfile_selinux_context
, 1, 1, 0,
2801 doc
: /* Return SELinux context of file named FILENAME,
2802 as a list ("user", "role", "type", "range"). Return (nil, nil, nil, nil)
2803 if file does not exist, is not accessible, or SELinux is disabled */)
2804 (Lisp_Object filename
)
2806 Lisp_Object absname
;
2807 Lisp_Object values
[4];
2808 Lisp_Object handler
;
2810 security_context_t con
;
2815 absname
= expand_and_dir_to_file (filename
, BVAR (current_buffer
, directory
));
2817 /* If the file name has special constructs in it,
2818 call the corresponding file handler. */
2819 handler
= Ffind_file_name_handler (absname
, Qfile_selinux_context
);
2820 if (!NILP (handler
))
2821 return call2 (handler
, Qfile_selinux_context
, absname
);
2823 absname
= ENCODE_FILE (absname
);
2830 if (is_selinux_enabled ())
2832 conlength
= lgetfilecon (SSDATA (absname
), &con
);
2835 context
= context_new (con
);
2836 if (context_user_get (context
))
2837 values
[0] = build_string (context_user_get (context
));
2838 if (context_role_get (context
))
2839 values
[1] = build_string (context_role_get (context
));
2840 if (context_type_get (context
))
2841 values
[2] = build_string (context_type_get (context
));
2842 if (context_range_get (context
))
2843 values
[3] = build_string (context_range_get (context
));
2844 context_free (context
);
2851 return Flist (sizeof (values
) / sizeof (values
[0]), values
);
2854 DEFUN ("set-file-selinux-context", Fset_file_selinux_context
,
2855 Sset_file_selinux_context
, 2, 2, 0,
2856 doc
: /* Set SELinux context of file named FILENAME to CONTEXT
2857 as a list ("user", "role", "type", "range"). Has no effect if SELinux
2859 (Lisp_Object filename
, Lisp_Object context
)
2861 Lisp_Object absname
;
2862 Lisp_Object handler
;
2864 Lisp_Object encoded_absname
;
2865 Lisp_Object user
= CAR_SAFE (context
);
2866 Lisp_Object role
= CAR_SAFE (CDR_SAFE (context
));
2867 Lisp_Object type
= CAR_SAFE (CDR_SAFE (CDR_SAFE (context
)));
2868 Lisp_Object range
= CAR_SAFE (CDR_SAFE (CDR_SAFE (CDR_SAFE (context
))));
2869 security_context_t con
;
2870 int fail
, conlength
;
2871 context_t parsed_con
;
2874 absname
= Fexpand_file_name (filename
, BVAR (current_buffer
, directory
));
2876 /* If the file name has special constructs in it,
2877 call the corresponding file handler. */
2878 handler
= Ffind_file_name_handler (absname
, Qset_file_selinux_context
);
2879 if (!NILP (handler
))
2880 return call3 (handler
, Qset_file_selinux_context
, absname
, context
);
2883 if (is_selinux_enabled ())
2885 /* Get current file context. */
2886 encoded_absname
= ENCODE_FILE (absname
);
2887 conlength
= lgetfilecon (SSDATA (encoded_absname
), &con
);
2890 parsed_con
= context_new (con
);
2891 /* Change the parts defined in the parameter.*/
2894 if (context_user_set (parsed_con
, SSDATA (user
)))
2895 error ("Doing context_user_set");
2899 if (context_role_set (parsed_con
, SSDATA (role
)))
2900 error ("Doing context_role_set");
2904 if (context_type_set (parsed_con
, SSDATA (type
)))
2905 error ("Doing context_type_set");
2907 if (STRINGP (range
))
2909 if (context_range_set (parsed_con
, SSDATA (range
)))
2910 error ("Doing context_range_set");
2913 /* Set the modified context back to the file. */
2914 fail
= lsetfilecon (SSDATA (encoded_absname
),
2915 context_str (parsed_con
));
2917 report_file_error ("Doing lsetfilecon", Fcons (absname
, Qnil
));
2919 context_free (parsed_con
);
2922 report_file_error ("Doing lgetfilecon", Fcons (absname
, Qnil
));
2932 DEFUN ("file-modes", Ffile_modes
, Sfile_modes
, 1, 1, 0,
2933 doc
: /* Return mode bits of file named FILENAME, as an integer.
2934 Return nil, if file does not exist or is not accessible. */)
2935 (Lisp_Object filename
)
2937 Lisp_Object absname
;
2939 Lisp_Object handler
;
2941 absname
= expand_and_dir_to_file (filename
, BVAR (current_buffer
, directory
));
2943 /* If the file name has special constructs in it,
2944 call the corresponding file handler. */
2945 handler
= Ffind_file_name_handler (absname
, Qfile_modes
);
2946 if (!NILP (handler
))
2947 return call2 (handler
, Qfile_modes
, absname
);
2949 absname
= ENCODE_FILE (absname
);
2951 if (stat (SSDATA (absname
), &st
) < 0)
2954 return make_number (st
.st_mode
& 07777);
2957 DEFUN ("set-file-modes", Fset_file_modes
, Sset_file_modes
, 2, 2,
2958 "(let ((file (read-file-name \"File: \"))) \
2959 (list file (read-file-modes nil file)))",
2960 doc
: /* Set mode bits of file named FILENAME to MODE (an integer).
2961 Only the 12 low bits of MODE are used.
2963 Interactively, mode bits are read by `read-file-modes', which accepts
2964 symbolic notation, like the `chmod' command from GNU Coreutils. */)
2965 (Lisp_Object filename
, Lisp_Object mode
)
2967 Lisp_Object absname
, encoded_absname
;
2968 Lisp_Object handler
;
2970 absname
= Fexpand_file_name (filename
, BVAR (current_buffer
, directory
));
2971 CHECK_NUMBER (mode
);
2973 /* If the file name has special constructs in it,
2974 call the corresponding file handler. */
2975 handler
= Ffind_file_name_handler (absname
, Qset_file_modes
);
2976 if (!NILP (handler
))
2977 return call3 (handler
, Qset_file_modes
, absname
, mode
);
2979 encoded_absname
= ENCODE_FILE (absname
);
2981 if (chmod (SSDATA (encoded_absname
), XINT (mode
) & 07777) < 0)
2982 report_file_error ("Doing chmod", Fcons (absname
, Qnil
));
2987 DEFUN ("set-default-file-modes", Fset_default_file_modes
, Sset_default_file_modes
, 1, 1, 0,
2988 doc
: /* Set the file permission bits for newly created files.
2989 The argument MODE should be an integer; only the low 9 bits are used.
2990 This setting is inherited by subprocesses. */)
2993 CHECK_NUMBER (mode
);
2995 umask ((~ XINT (mode
)) & 0777);
3000 DEFUN ("default-file-modes", Fdefault_file_modes
, Sdefault_file_modes
, 0, 0, 0,
3001 doc
: /* Return the default file protection for created files.
3002 The value is an integer. */)
3008 realmask
= umask (0);
3011 XSETINT (value
, (~ realmask
) & 0777);
3016 DEFUN ("set-file-times", Fset_file_times
, Sset_file_times
, 1, 2, 0,
3017 doc
: /* Set times of file FILENAME to TIMESTAMP.
3018 Set both access and modification times.
3019 Return t on success, else nil.
3020 Use the current time if TIMESTAMP is nil. TIMESTAMP is in the format of
3022 (Lisp_Object filename
, Lisp_Object timestamp
)
3024 Lisp_Object absname
, encoded_absname
;
3025 Lisp_Object handler
;
3029 if (! lisp_time_argument (timestamp
, &sec
, &usec
))
3030 error ("Invalid time specification");
3032 absname
= Fexpand_file_name (filename
, BVAR (current_buffer
, directory
));
3034 /* If the file name has special constructs in it,
3035 call the corresponding file handler. */
3036 handler
= Ffind_file_name_handler (absname
, Qset_file_times
);
3037 if (!NILP (handler
))
3038 return call3 (handler
, Qset_file_times
, absname
, timestamp
);
3040 encoded_absname
= ENCODE_FILE (absname
);
3045 EMACS_SET_SECS (t
, sec
);
3046 EMACS_SET_USECS (t
, usec
);
3048 if (set_file_times (SSDATA (encoded_absname
), t
, t
))
3053 /* Setting times on a directory always fails. */
3054 if (stat (SSDATA (encoded_absname
), &st
) == 0 && S_ISDIR (st
.st_mode
))
3057 report_file_error ("Setting file times", Fcons (absname
, Qnil
));
3066 DEFUN ("unix-sync", Funix_sync
, Sunix_sync
, 0, 0, "",
3067 doc
: /* Tell Unix to finish all pending disk updates. */)
3074 #endif /* HAVE_SYNC */
3076 DEFUN ("file-newer-than-file-p", Ffile_newer_than_file_p
, Sfile_newer_than_file_p
, 2, 2, 0,
3077 doc
: /* Return t if file FILE1 is newer than file FILE2.
3078 If FILE1 does not exist, the answer is nil;
3079 otherwise, if FILE2 does not exist, the answer is t. */)
3080 (Lisp_Object file1
, Lisp_Object file2
)
3082 Lisp_Object absname1
, absname2
;
3085 Lisp_Object handler
;
3086 struct gcpro gcpro1
, gcpro2
;
3088 CHECK_STRING (file1
);
3089 CHECK_STRING (file2
);
3092 GCPRO2 (absname1
, file2
);
3093 absname1
= expand_and_dir_to_file (file1
, BVAR (current_buffer
, directory
));
3094 absname2
= expand_and_dir_to_file (file2
, BVAR (current_buffer
, directory
));
3097 /* If the file name has special constructs in it,
3098 call the corresponding file handler. */
3099 handler
= Ffind_file_name_handler (absname1
, Qfile_newer_than_file_p
);
3101 handler
= Ffind_file_name_handler (absname2
, Qfile_newer_than_file_p
);
3102 if (!NILP (handler
))
3103 return call3 (handler
, Qfile_newer_than_file_p
, absname1
, absname2
);
3105 GCPRO2 (absname1
, absname2
);
3106 absname1
= ENCODE_FILE (absname1
);
3107 absname2
= ENCODE_FILE (absname2
);
3110 if (stat (SSDATA (absname1
), &st
) < 0)
3113 mtime1
= st
.st_mtime
;
3115 if (stat (SSDATA (absname2
), &st
) < 0)
3118 return (mtime1
> st
.st_mtime
) ? Qt
: Qnil
;
3121 #ifndef READ_BUF_SIZE
3122 #define READ_BUF_SIZE (64 << 10)
3125 /* This function is called after Lisp functions to decide a coding
3126 system are called, or when they cause an error. Before they are
3127 called, the current buffer is set unibyte and it contains only a
3128 newly inserted text (thus the buffer was empty before the
3131 The functions may set markers, overlays, text properties, or even
3132 alter the buffer contents, change the current buffer.
3134 Here, we reset all those changes by:
3135 o set back the current buffer.
3136 o move all markers and overlays to BEG.
3137 o remove all text properties.
3138 o set back the buffer multibyteness. */
3141 decide_coding_unwind (Lisp_Object unwind_data
)
3143 Lisp_Object multibyte
, undo_list
, buffer
;
3145 multibyte
= XCAR (unwind_data
);
3146 unwind_data
= XCDR (unwind_data
);
3147 undo_list
= XCAR (unwind_data
);
3148 buffer
= XCDR (unwind_data
);
3150 if (current_buffer
!= XBUFFER (buffer
))
3151 set_buffer_internal (XBUFFER (buffer
));
3152 adjust_markers_for_delete (BEG
, BEG_BYTE
, Z
, Z_BYTE
);
3153 adjust_overlays_for_delete (BEG
, Z
- BEG
);
3154 BUF_INTERVALS (current_buffer
) = 0;
3155 TEMP_SET_PT_BOTH (BEG
, BEG_BYTE
);
3157 /* Now we are safe to change the buffer's multibyteness directly. */
3158 BVAR (current_buffer
, enable_multibyte_characters
) = multibyte
;
3159 BVAR (current_buffer
, undo_list
) = undo_list
;
3165 /* Used to pass values from insert-file-contents to read_non_regular. */
3167 static int non_regular_fd
;
3168 static EMACS_INT non_regular_inserted
;
3169 static EMACS_INT non_regular_nbytes
;
3172 /* Read from a non-regular file.
3173 Read non_regular_nbytes bytes max from non_regular_fd.
3174 Non_regular_inserted specifies where to put the read bytes.
3175 Value is the number of bytes read. */
3178 read_non_regular (Lisp_Object ignore
)
3184 nbytes
= emacs_read (non_regular_fd
,
3185 ((char *) BEG_ADDR
+ PT_BYTE
- BEG_BYTE
3186 + non_regular_inserted
),
3187 non_regular_nbytes
);
3189 return make_number (nbytes
);
3193 /* Condition-case handler used when reading from non-regular files
3194 in insert-file-contents. */
3197 read_non_regular_quit (Lisp_Object ignore
)
3202 /* Reposition FD to OFFSET, based on WHENCE. This acts like lseek
3203 except that it also tests for OFFSET being out of lseek's range. */
3205 emacs_lseek (int fd
, EMACS_INT offset
, int whence
)
3207 /* Use "&" rather than "&&" to suppress a bogus GCC warning; see
3208 <http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43772>. */
3209 if (! ((TYPE_MINIMUM (off_t
) <= offset
) & (offset
<= TYPE_MAXIMUM (off_t
))))
3214 return lseek (fd
, offset
, whence
);
3218 DEFUN ("insert-file-contents", Finsert_file_contents
, Sinsert_file_contents
,
3220 doc
: /* Insert contents of file FILENAME after point.
3221 Returns list of absolute file name and number of characters inserted.
3222 If second argument VISIT is non-nil, the buffer's visited filename and
3223 last save file modtime are set, and it is marked unmodified. If
3224 visiting and the file does not exist, visiting is completed before the
3227 The optional third and fourth arguments BEG and END specify what portion
3228 of the file to insert. These arguments count bytes in the file, not
3229 characters in the buffer. If VISIT is non-nil, BEG and END must be nil.
3231 If optional fifth argument REPLACE is non-nil, replace the current
3232 buffer contents (in the accessible portion) with the file contents.
3233 This is better than simply deleting and inserting the whole thing
3234 because (1) it preserves some marker positions and (2) it puts less data
3235 in the undo list. When REPLACE is non-nil, the second return value is
3236 the number of characters that replace previous buffer contents.
3238 This function does code conversion according to the value of
3239 `coding-system-for-read' or `file-coding-system-alist', and sets the
3240 variable `last-coding-system-used' to the coding system actually used. */)
3241 (Lisp_Object filename
, Lisp_Object visit
, Lisp_Object beg
, Lisp_Object end
, Lisp_Object replace
)
3245 EMACS_INT inserted
= 0;
3247 register EMACS_INT how_much
;
3248 off_t beg_offset
, end_offset
;
3249 register EMACS_INT unprocessed
;
3250 int count
= SPECPDL_INDEX ();
3251 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
, gcpro5
;
3252 Lisp_Object handler
, val
, insval
, orig_filename
, old_undo
;
3254 EMACS_INT total
= 0;
3255 int not_regular
= 0;
3257 char read_buf
[READ_BUF_SIZE
];
3258 struct coding_system coding
;
3259 char buffer
[1 << 14];
3260 int replace_handled
= 0;
3261 int set_coding_system
= 0;
3262 Lisp_Object coding_system
;
3264 Lisp_Object old_Vdeactivate_mark
= Vdeactivate_mark
;
3265 int we_locked_file
= 0;
3266 int deferred_remove_unwind_protect
= 0;
3268 if (current_buffer
->base_buffer
&& ! NILP (visit
))
3269 error ("Cannot do file visiting in an indirect buffer");
3271 if (!NILP (BVAR (current_buffer
, read_only
)))
3272 Fbarf_if_buffer_read_only ();
3276 orig_filename
= Qnil
;
3279 GCPRO5 (filename
, val
, p
, orig_filename
, old_undo
);
3281 CHECK_STRING (filename
);
3282 filename
= Fexpand_file_name (filename
, Qnil
);
3284 /* The value Qnil means that the coding system is not yet
3286 coding_system
= Qnil
;
3288 /* If the file name has special constructs in it,
3289 call the corresponding file handler. */
3290 handler
= Ffind_file_name_handler (filename
, Qinsert_file_contents
);
3291 if (!NILP (handler
))
3293 val
= call6 (handler
, Qinsert_file_contents
, filename
,
3294 visit
, beg
, end
, replace
);
3295 if (CONSP (val
) && CONSP (XCDR (val
)))
3296 inserted
= XINT (XCAR (XCDR (val
)));
3300 orig_filename
= filename
;
3301 filename
= ENCODE_FILE (filename
);
3307 Lisp_Object tem
= Vw32_get_true_file_attributes
;
3309 /* Tell stat to use expensive method to get accurate info. */
3310 Vw32_get_true_file_attributes
= Qt
;
3311 total
= stat (SSDATA (filename
), &st
);
3312 Vw32_get_true_file_attributes
= tem
;
3316 if (stat (SSDATA (filename
), &st
) < 0)
3317 #endif /* WINDOWSNT */
3322 report_file_error ("Opening input file", Fcons (orig_filename
, Qnil
));
3326 if (!NILP (Vcoding_system_for_read
))
3327 Fset (Qbuffer_file_coding_system
, Vcoding_system_for_read
);
3331 /* This code will need to be changed in order to work on named
3332 pipes, and it's probably just not worth it. So we should at
3333 least signal an error. */
3334 if (!S_ISREG (st
.st_mode
))
3341 if (! NILP (replace
) || ! NILP (beg
) || ! NILP (end
))
3342 xsignal2 (Qfile_error
,
3343 build_string ("not a regular file"), orig_filename
);
3347 if ((fd
= emacs_open (SSDATA (filename
), O_RDONLY
, 0)) < 0)
3350 /* Replacement should preserve point as it preserves markers. */
3351 if (!NILP (replace
))
3352 record_unwind_protect (restore_point_unwind
, Fpoint_marker ());
3354 record_unwind_protect (close_file_unwind
, make_number (fd
));
3359 if (!NILP (beg
) || !NILP (end
))
3360 error ("Attempt to visit less than an entire file");
3361 if (BEG
< Z
&& NILP (replace
))
3362 error ("Cannot do file visiting in a non-empty buffer");
3367 if (! (RANGED_INTEGERP (0, beg
, TYPE_MAXIMUM (off_t
))))
3368 wrong_type_argument (intern ("file-offset"), beg
);
3369 beg_offset
= XFASTINT (beg
);
3376 if (! (RANGED_INTEGERP (0, end
, TYPE_MAXIMUM (off_t
))))
3377 wrong_type_argument (intern ("file-offset"), end
);
3378 end_offset
= XFASTINT (end
);
3383 end_offset
= TYPE_MAXIMUM (off_t
);
3386 end_offset
= st
.st_size
;
3388 /* A negative size can happen on a platform that allows file
3389 sizes greater than the maximum off_t value. */
3393 /* The file size returned from stat may be zero, but data
3394 may be readable nonetheless, for example when this is a
3395 file in the /proc filesystem. */
3396 if (end_offset
== 0)
3397 end_offset
= READ_BUF_SIZE
;
3401 /* Check now whether the buffer will become too large,
3402 in the likely case where the file's length is not changing.
3403 This saves a lot of needless work before a buffer overflow. */
3406 /* The likely offset where we will stop reading. We could read
3407 more (or less), if the file grows (or shrinks) as we read it. */
3408 off_t likely_end
= min (end_offset
, st
.st_size
);
3410 if (beg_offset
< likely_end
)
3412 ptrdiff_t buf_bytes
=
3413 Z_BYTE
- (!NILP (replace
) ? ZV_BYTE
- BEGV_BYTE
: 0);
3414 ptrdiff_t buf_growth_max
= BUF_BYTES_MAX
- buf_bytes
;
3415 off_t likely_growth
= likely_end
- beg_offset
;
3416 if (buf_growth_max
< likely_growth
)
3421 /* Prevent redisplay optimizations. */
3422 current_buffer
->clip_changed
= 1;
3424 if (EQ (Vcoding_system_for_read
, Qauto_save_coding
))
3426 coding_system
= coding_inherit_eol_type (Qutf_8_emacs
, Qunix
);
3427 setup_coding_system (coding_system
, &coding
);
3428 /* Ensure we set Vlast_coding_system_used. */
3429 set_coding_system
= 1;
3433 /* Decide the coding system to use for reading the file now
3434 because we can't use an optimized method for handling
3435 `coding:' tag if the current buffer is not empty. */
3436 if (!NILP (Vcoding_system_for_read
))
3437 coding_system
= Vcoding_system_for_read
;
3440 /* Don't try looking inside a file for a coding system
3441 specification if it is not seekable. */
3442 if (! not_regular
&& ! NILP (Vset_auto_coding_function
))
3444 /* Find a coding system specified in the heading two
3445 lines or in the tailing several lines of the file.
3446 We assume that the 1K-byte and 3K-byte for heading
3447 and tailing respectively are sufficient for this
3451 if (st
.st_size
<= (1024 * 4))
3452 nread
= emacs_read (fd
, read_buf
, 1024 * 4);
3455 nread
= emacs_read (fd
, read_buf
, 1024);
3458 if (lseek (fd
, st
.st_size
- (1024 * 3), SEEK_SET
) < 0)
3459 report_file_error ("Setting file position",
3460 Fcons (orig_filename
, Qnil
));
3461 nread
+= emacs_read (fd
, read_buf
+ nread
, 1024 * 3);
3466 error ("IO error reading %s: %s",
3467 SDATA (orig_filename
), emacs_strerror (errno
));
3470 struct buffer
*prev
= current_buffer
;
3471 Lisp_Object workbuf
;
3474 record_unwind_protect (Fset_buffer
, Fcurrent_buffer ());
3476 workbuf
= Fget_buffer_create (build_string (" *code-converting-work*"));
3477 buf
= XBUFFER (workbuf
);
3479 delete_all_overlays (buf
);
3480 BVAR (buf
, directory
) = BVAR (current_buffer
, directory
);
3481 BVAR (buf
, read_only
) = Qnil
;
3482 BVAR (buf
, filename
) = Qnil
;
3483 BVAR (buf
, undo_list
) = Qt
;
3484 eassert (buf
->overlays_before
== NULL
);
3485 eassert (buf
->overlays_after
== NULL
);
3487 set_buffer_internal (buf
);
3489 BVAR (buf
, enable_multibyte_characters
) = Qnil
;
3491 insert_1_both ((char *) read_buf
, nread
, nread
, 0, 0, 0);
3492 TEMP_SET_PT_BOTH (BEG
, BEG_BYTE
);
3493 coding_system
= call2 (Vset_auto_coding_function
,
3494 filename
, make_number (nread
));
3495 set_buffer_internal (prev
);
3497 /* Discard the unwind protect for recovering the
3501 /* Rewind the file for the actual read done later. */
3502 if (lseek (fd
, 0, SEEK_SET
) < 0)
3503 report_file_error ("Setting file position",
3504 Fcons (orig_filename
, Qnil
));
3508 if (NILP (coding_system
))
3510 /* If we have not yet decided a coding system, check
3511 file-coding-system-alist. */
3512 Lisp_Object args
[6];
3514 args
[0] = Qinsert_file_contents
, args
[1] = orig_filename
;
3515 args
[2] = visit
, args
[3] = beg
, args
[4] = end
, args
[5] = replace
;
3516 coding_system
= Ffind_operation_coding_system (6, args
);
3517 if (CONSP (coding_system
))
3518 coding_system
= XCAR (coding_system
);
3522 if (NILP (coding_system
))
3523 coding_system
= Qundecided
;
3525 CHECK_CODING_SYSTEM (coding_system
);
3527 if (NILP (BVAR (current_buffer
, enable_multibyte_characters
)))
3528 /* We must suppress all character code conversion except for
3529 end-of-line conversion. */
3530 coding_system
= raw_text_coding_system (coding_system
);
3532 setup_coding_system (coding_system
, &coding
);
3533 /* Ensure we set Vlast_coding_system_used. */
3534 set_coding_system
= 1;
3537 /* If requested, replace the accessible part of the buffer
3538 with the file contents. Avoid replacing text at the
3539 beginning or end of the buffer that matches the file contents;
3540 that preserves markers pointing to the unchanged parts.
3542 Here we implement this feature in an optimized way
3543 for the case where code conversion is NOT needed.
3544 The following if-statement handles the case of conversion
3545 in a less optimal way.
3547 If the code conversion is "automatic" then we try using this
3548 method and hope for the best.
3549 But if we discover the need for conversion, we give up on this method
3550 and let the following if-statement handle the replace job. */
3553 && (NILP (coding_system
)
3554 || ! CODING_REQUIRE_DECODING (&coding
)))
3556 /* same_at_start and same_at_end count bytes,
3557 because file access counts bytes
3558 and BEG and END count bytes. */
3559 EMACS_INT same_at_start
= BEGV_BYTE
;
3560 EMACS_INT same_at_end
= ZV_BYTE
;
3562 /* There is still a possibility we will find the need to do code
3563 conversion. If that happens, we set this variable to 1 to
3564 give up on handling REPLACE in the optimized way. */
3565 int giveup_match_end
= 0;
3567 if (beg_offset
!= 0)
3569 if (lseek (fd
, beg_offset
, SEEK_SET
) < 0)
3570 report_file_error ("Setting file position",
3571 Fcons (orig_filename
, Qnil
));
3576 /* Count how many chars at the start of the file
3577 match the text at the beginning of the buffer. */
3580 EMACS_INT nread
, bufpos
;
3582 nread
= emacs_read (fd
, buffer
, sizeof buffer
);
3584 error ("IO error reading %s: %s",
3585 SSDATA (orig_filename
), emacs_strerror (errno
));
3586 else if (nread
== 0)
3589 if (CODING_REQUIRE_DETECTION (&coding
))
3591 coding_system
= detect_coding_system ((unsigned char *) buffer
,
3594 setup_coding_system (coding_system
, &coding
);
3597 if (CODING_REQUIRE_DECODING (&coding
))
3598 /* We found that the file should be decoded somehow.
3599 Let's give up here. */
3601 giveup_match_end
= 1;
3606 while (bufpos
< nread
&& same_at_start
< ZV_BYTE
3607 && FETCH_BYTE (same_at_start
) == buffer
[bufpos
])
3608 same_at_start
++, bufpos
++;
3609 /* If we found a discrepancy, stop the scan.
3610 Otherwise loop around and scan the next bufferful. */
3611 if (bufpos
!= nread
)
3615 /* If the file matches the buffer completely,
3616 there's no need to replace anything. */
3617 if (same_at_start
- BEGV_BYTE
== end_offset
- beg_offset
)
3621 /* Truncate the buffer to the size of the file. */
3622 del_range_1 (same_at_start
, same_at_end
, 0, 0);
3627 /* Count how many chars at the end of the file
3628 match the text at the end of the buffer. But, if we have
3629 already found that decoding is necessary, don't waste time. */
3630 while (!giveup_match_end
)
3632 int total_read
, nread
, bufpos
, trial
;
3635 /* At what file position are we now scanning? */
3636 curpos
= end_offset
- (ZV_BYTE
- same_at_end
);
3637 /* If the entire file matches the buffer tail, stop the scan. */
3640 /* How much can we scan in the next step? */
3641 trial
= min (curpos
, sizeof buffer
);
3642 if (lseek (fd
, curpos
- trial
, SEEK_SET
) < 0)
3643 report_file_error ("Setting file position",
3644 Fcons (orig_filename
, Qnil
));
3646 total_read
= nread
= 0;
3647 while (total_read
< trial
)
3649 nread
= emacs_read (fd
, buffer
+ total_read
, trial
- total_read
);
3651 error ("IO error reading %s: %s",
3652 SDATA (orig_filename
), emacs_strerror (errno
));
3653 else if (nread
== 0)
3655 total_read
+= nread
;
3658 /* Scan this bufferful from the end, comparing with
3659 the Emacs buffer. */
3660 bufpos
= total_read
;
3662 /* Compare with same_at_start to avoid counting some buffer text
3663 as matching both at the file's beginning and at the end. */
3664 while (bufpos
> 0 && same_at_end
> same_at_start
3665 && FETCH_BYTE (same_at_end
- 1) == buffer
[bufpos
- 1])
3666 same_at_end
--, bufpos
--;
3668 /* If we found a discrepancy, stop the scan.
3669 Otherwise loop around and scan the preceding bufferful. */
3672 /* If this discrepancy is because of code conversion,
3673 we cannot use this method; giveup and try the other. */
3674 if (same_at_end
> same_at_start
3675 && FETCH_BYTE (same_at_end
- 1) >= 0200
3676 && ! NILP (BVAR (current_buffer
, enable_multibyte_characters
))
3677 && (CODING_MAY_REQUIRE_DECODING (&coding
)))
3678 giveup_match_end
= 1;
3687 if (! giveup_match_end
)
3691 /* We win! We can handle REPLACE the optimized way. */
3693 /* Extend the start of non-matching text area to multibyte
3694 character boundary. */
3695 if (! NILP (BVAR (current_buffer
, enable_multibyte_characters
)))
3696 while (same_at_start
> BEGV_BYTE
3697 && ! CHAR_HEAD_P (FETCH_BYTE (same_at_start
)))
3700 /* Extend the end of non-matching text area to multibyte
3701 character boundary. */
3702 if (! NILP (BVAR (current_buffer
, enable_multibyte_characters
)))
3703 while (same_at_end
< ZV_BYTE
3704 && ! CHAR_HEAD_P (FETCH_BYTE (same_at_end
)))
3707 /* Don't try to reuse the same piece of text twice. */
3708 overlap
= (same_at_start
- BEGV_BYTE
3710 + (! NILP (end
) ? end_offset
: st
.st_size
) - ZV_BYTE
));
3712 same_at_end
+= overlap
;
3714 /* Arrange to read only the nonmatching middle part of the file. */
3715 beg_offset
+= same_at_start
- BEGV_BYTE
;
3716 end_offset
-= ZV_BYTE
- same_at_end
;
3718 del_range_byte (same_at_start
, same_at_end
, 0);
3719 /* Insert from the file at the proper position. */
3720 temp
= BYTE_TO_CHAR (same_at_start
);
3721 SET_PT_BOTH (temp
, same_at_start
);
3723 /* If display currently starts at beginning of line,
3724 keep it that way. */
3725 if (XBUFFER (XWINDOW (selected_window
)->buffer
) == current_buffer
)
3726 XWINDOW (selected_window
)->start_at_line_beg
= Fbolp ();
3728 replace_handled
= 1;
3732 /* If requested, replace the accessible part of the buffer
3733 with the file contents. Avoid replacing text at the
3734 beginning or end of the buffer that matches the file contents;
3735 that preserves markers pointing to the unchanged parts.
3737 Here we implement this feature for the case where code conversion
3738 is needed, in a simple way that needs a lot of memory.
3739 The preceding if-statement handles the case of no conversion
3740 in a more optimized way. */
3741 if (!NILP (replace
) && ! replace_handled
&& BEGV
< ZV
)
3743 EMACS_INT same_at_start
= BEGV_BYTE
;
3744 EMACS_INT same_at_end
= ZV_BYTE
;
3745 EMACS_INT same_at_start_charpos
;
3746 EMACS_INT inserted_chars
;
3749 unsigned char *decoded
;
3752 int this_count
= SPECPDL_INDEX ();
3753 int multibyte
= ! NILP (BVAR (current_buffer
, enable_multibyte_characters
));
3754 Lisp_Object conversion_buffer
;
3755 struct gcpro gcpro1
;
3757 conversion_buffer
= code_conversion_save (1, multibyte
);
3759 /* First read the whole file, performing code conversion into
3760 CONVERSION_BUFFER. */
3762 if (lseek (fd
, beg_offset
, SEEK_SET
) < 0)
3763 report_file_error ("Setting file position",
3764 Fcons (orig_filename
, Qnil
));
3766 total
= st
.st_size
; /* Total bytes in the file. */
3767 how_much
= 0; /* Bytes read from file so far. */
3768 inserted
= 0; /* Bytes put into CONVERSION_BUFFER so far. */
3769 unprocessed
= 0; /* Bytes not processed in previous loop. */
3771 GCPRO1 (conversion_buffer
);
3772 while (how_much
< total
)
3774 /* We read one bunch by one (READ_BUF_SIZE bytes) to allow
3775 quitting while reading a huge while. */
3776 /* `try'' is reserved in some compilers (Microsoft C). */
3777 EMACS_INT trytry
= min (total
- how_much
,
3778 READ_BUF_SIZE
- unprocessed
);
3780 /* Allow quitting out of the actual I/O. */
3783 this = emacs_read (fd
, read_buf
+ unprocessed
, trytry
);
3791 BUF_TEMP_SET_PT (XBUFFER (conversion_buffer
),
3792 BUF_Z (XBUFFER (conversion_buffer
)));
3793 decode_coding_c_string (&coding
, (unsigned char *) read_buf
,
3794 unprocessed
+ this, conversion_buffer
);
3795 unprocessed
= coding
.carryover_bytes
;
3796 if (coding
.carryover_bytes
> 0)
3797 memcpy (read_buf
, coding
.carryover
, unprocessed
);
3802 /* We should remove the unwind_protect calling
3803 close_file_unwind, but other stuff has been added the stack,
3804 so defer the removal till we reach the `handled' label. */
3805 deferred_remove_unwind_protect
= 1;
3807 /* At this point, HOW_MUCH should equal TOTAL, or should be <= 0
3808 if we couldn't read the file. */
3811 error ("IO error reading %s: %s",
3812 SDATA (orig_filename
), emacs_strerror (errno
));
3814 if (unprocessed
> 0)
3816 coding
.mode
|= CODING_MODE_LAST_BLOCK
;
3817 decode_coding_c_string (&coding
, (unsigned char *) read_buf
,
3818 unprocessed
, conversion_buffer
);
3819 coding
.mode
&= ~CODING_MODE_LAST_BLOCK
;
3822 coding_system
= CODING_ID_NAME (coding
.id
);
3823 set_coding_system
= 1;
3824 decoded
= BUF_BEG_ADDR (XBUFFER (conversion_buffer
));
3825 inserted
= (BUF_Z_BYTE (XBUFFER (conversion_buffer
))
3826 - BUF_BEG_BYTE (XBUFFER (conversion_buffer
)));
3828 /* Compare the beginning of the converted string with the buffer
3832 while (bufpos
< inserted
&& same_at_start
< same_at_end
3833 && FETCH_BYTE (same_at_start
) == decoded
[bufpos
])
3834 same_at_start
++, bufpos
++;
3836 /* If the file matches the head of buffer completely,
3837 there's no need to replace anything. */
3839 if (bufpos
== inserted
)
3841 /* Truncate the buffer to the size of the file. */
3842 if (same_at_start
== same_at_end
)
3845 del_range_byte (same_at_start
, same_at_end
, 0);
3848 unbind_to (this_count
, Qnil
);
3852 /* Extend the start of non-matching text area to the previous
3853 multibyte character boundary. */
3854 if (! NILP (BVAR (current_buffer
, enable_multibyte_characters
)))
3855 while (same_at_start
> BEGV_BYTE
3856 && ! CHAR_HEAD_P (FETCH_BYTE (same_at_start
)))
3859 /* Scan this bufferful from the end, comparing with
3860 the Emacs buffer. */
3863 /* Compare with same_at_start to avoid counting some buffer text
3864 as matching both at the file's beginning and at the end. */
3865 while (bufpos
> 0 && same_at_end
> same_at_start
3866 && FETCH_BYTE (same_at_end
- 1) == decoded
[bufpos
- 1])
3867 same_at_end
--, bufpos
--;
3869 /* Extend the end of non-matching text area to the next
3870 multibyte character boundary. */
3871 if (! NILP (BVAR (current_buffer
, enable_multibyte_characters
)))
3872 while (same_at_end
< ZV_BYTE
3873 && ! CHAR_HEAD_P (FETCH_BYTE (same_at_end
)))
3876 /* Don't try to reuse the same piece of text twice. */
3877 overlap
= same_at_start
- BEGV_BYTE
- (same_at_end
+ inserted
- ZV_BYTE
);
3879 same_at_end
+= overlap
;
3881 /* If display currently starts at beginning of line,
3882 keep it that way. */
3883 if (XBUFFER (XWINDOW (selected_window
)->buffer
) == current_buffer
)
3884 XWINDOW (selected_window
)->start_at_line_beg
= Fbolp ();
3886 /* Replace the chars that we need to replace,
3887 and update INSERTED to equal the number of bytes
3888 we are taking from the decoded string. */
3889 inserted
-= (ZV_BYTE
- same_at_end
) + (same_at_start
- BEGV_BYTE
);
3891 if (same_at_end
!= same_at_start
)
3893 del_range_byte (same_at_start
, same_at_end
, 0);
3895 same_at_start
= GPT_BYTE
;
3899 temp
= BYTE_TO_CHAR (same_at_start
);
3901 /* Insert from the file at the proper position. */
3902 SET_PT_BOTH (temp
, same_at_start
);
3903 same_at_start_charpos
3904 = buf_bytepos_to_charpos (XBUFFER (conversion_buffer
),
3905 same_at_start
- BEGV_BYTE
3906 + BUF_BEG_BYTE (XBUFFER (conversion_buffer
)));
3908 = (buf_bytepos_to_charpos (XBUFFER (conversion_buffer
),
3909 same_at_start
+ inserted
- BEGV_BYTE
3910 + BUF_BEG_BYTE (XBUFFER (conversion_buffer
)))
3911 - same_at_start_charpos
);
3912 /* This binding is to avoid ask-user-about-supersession-threat
3913 being called in insert_from_buffer (via in
3914 prepare_to_modify_buffer). */
3915 specbind (intern ("buffer-file-name"), Qnil
);
3916 insert_from_buffer (XBUFFER (conversion_buffer
),
3917 same_at_start_charpos
, inserted_chars
, 0);
3918 /* Set `inserted' to the number of inserted characters. */
3919 inserted
= PT
- temp
;
3920 /* Set point before the inserted characters. */
3921 SET_PT_BOTH (temp
, same_at_start
);
3923 unbind_to (this_count
, Qnil
);
3929 total
= end_offset
- beg_offset
;
3931 /* For a special file, all we can do is guess. */
3932 total
= READ_BUF_SIZE
;
3934 if (NILP (visit
) && total
> 0)
3936 #ifdef CLASH_DETECTION
3937 if (!NILP (BVAR (current_buffer
, file_truename
))
3938 /* Make binding buffer-file-name to nil effective. */
3939 && !NILP (BVAR (current_buffer
, filename
))
3940 && SAVE_MODIFF
>= MODIFF
)
3942 #endif /* CLASH_DETECTION */
3943 prepare_to_modify_buffer (GPT
, GPT
, NULL
);
3947 if (GAP_SIZE
< total
)
3948 make_gap (total
- GAP_SIZE
);
3950 if (beg_offset
!= 0 || !NILP (replace
))
3952 if (lseek (fd
, beg_offset
, SEEK_SET
) < 0)
3953 report_file_error ("Setting file position",
3954 Fcons (orig_filename
, Qnil
));
3957 /* In the following loop, HOW_MUCH contains the total bytes read so
3958 far for a regular file, and not changed for a special file. But,
3959 before exiting the loop, it is set to a negative value if I/O
3963 /* Total bytes inserted. */
3966 /* Here, we don't do code conversion in the loop. It is done by
3967 decode_coding_gap after all data are read into the buffer. */
3969 EMACS_INT gap_size
= GAP_SIZE
;
3971 while (how_much
< total
)
3973 /* try is reserved in some compilers (Microsoft C) */
3974 EMACS_INT trytry
= min (total
- how_much
, READ_BUF_SIZE
);
3981 /* Maybe make more room. */
3982 if (gap_size
< trytry
)
3984 make_gap (total
- gap_size
);
3985 gap_size
= GAP_SIZE
;
3988 /* Read from the file, capturing `quit'. When an
3989 error occurs, end the loop, and arrange for a quit
3990 to be signaled after decoding the text we read. */
3991 non_regular_fd
= fd
;
3992 non_regular_inserted
= inserted
;
3993 non_regular_nbytes
= trytry
;
3994 nbytes
= internal_condition_case_1 (read_non_regular
,
3996 read_non_regular_quit
);
4003 this = XINT (nbytes
);
4007 /* Allow quitting out of the actual I/O. We don't make text
4008 part of the buffer until all the reading is done, so a C-g
4009 here doesn't do any harm. */
4012 this = emacs_read (fd
,
4013 ((char *) BEG_ADDR
+ PT_BYTE
- BEG_BYTE
4027 /* For a regular file, where TOTAL is the real size,
4028 count HOW_MUCH to compare with it.
4029 For a special file, where TOTAL is just a buffer size,
4030 so don't bother counting in HOW_MUCH.
4031 (INSERTED is where we count the number of characters inserted.) */
4038 /* Now we have read all the file data into the gap.
4039 If it was empty, undo marking the buffer modified. */
4043 #ifdef CLASH_DETECTION
4045 unlock_file (BVAR (current_buffer
, file_truename
));
4047 Vdeactivate_mark
= old_Vdeactivate_mark
;
4050 Vdeactivate_mark
= Qt
;
4052 /* Make the text read part of the buffer. */
4053 GAP_SIZE
-= inserted
;
4055 GPT_BYTE
+= inserted
;
4057 ZV_BYTE
+= inserted
;
4062 /* Put an anchor to ensure multi-byte form ends at gap. */
4067 /* Discard the unwind protect for closing the file. */
4071 error ("IO error reading %s: %s",
4072 SDATA (orig_filename
), emacs_strerror (errno
));
4076 if (NILP (coding_system
))
4078 /* The coding system is not yet decided. Decide it by an
4079 optimized method for handling `coding:' tag.
4081 Note that we can get here only if the buffer was empty
4082 before the insertion. */
4084 if (!NILP (Vcoding_system_for_read
))
4085 coding_system
= Vcoding_system_for_read
;
4088 /* Since we are sure that the current buffer was empty
4089 before the insertion, we can toggle
4090 enable-multibyte-characters directly here without taking
4091 care of marker adjustment. By this way, we can run Lisp
4092 program safely before decoding the inserted text. */
4093 Lisp_Object unwind_data
;
4094 int count1
= SPECPDL_INDEX ();
4096 unwind_data
= Fcons (BVAR (current_buffer
, enable_multibyte_characters
),
4097 Fcons (BVAR (current_buffer
, undo_list
),
4098 Fcurrent_buffer ()));
4099 BVAR (current_buffer
, enable_multibyte_characters
) = Qnil
;
4100 BVAR (current_buffer
, undo_list
) = Qt
;
4101 record_unwind_protect (decide_coding_unwind
, unwind_data
);
4103 if (inserted
> 0 && ! NILP (Vset_auto_coding_function
))
4105 coding_system
= call2 (Vset_auto_coding_function
,
4106 filename
, make_number (inserted
));
4109 if (NILP (coding_system
))
4111 /* If the coding system is not yet decided, check
4112 file-coding-system-alist. */
4113 Lisp_Object args
[6];
4115 args
[0] = Qinsert_file_contents
, args
[1] = orig_filename
;
4116 args
[2] = visit
, args
[3] = beg
, args
[4] = end
, args
[5] = Qnil
;
4117 coding_system
= Ffind_operation_coding_system (6, args
);
4118 if (CONSP (coding_system
))
4119 coding_system
= XCAR (coding_system
);
4121 unbind_to (count1
, Qnil
);
4122 inserted
= Z_BYTE
- BEG_BYTE
;
4125 if (NILP (coding_system
))
4126 coding_system
= Qundecided
;
4128 CHECK_CODING_SYSTEM (coding_system
);
4130 if (NILP (BVAR (current_buffer
, enable_multibyte_characters
)))
4131 /* We must suppress all character code conversion except for
4132 end-of-line conversion. */
4133 coding_system
= raw_text_coding_system (coding_system
);
4134 setup_coding_system (coding_system
, &coding
);
4135 /* Ensure we set Vlast_coding_system_used. */
4136 set_coding_system
= 1;
4141 /* When we visit a file by raw-text, we change the buffer to
4143 if (CODING_FOR_UNIBYTE (&coding
)
4144 /* Can't do this if part of the buffer might be preserved. */
4146 /* Visiting a file with these coding system makes the buffer
4148 BVAR (current_buffer
, enable_multibyte_characters
) = Qnil
;
4151 coding
.dst_multibyte
= ! NILP (BVAR (current_buffer
, enable_multibyte_characters
));
4152 if (CODING_MAY_REQUIRE_DECODING (&coding
)
4153 && (inserted
> 0 || CODING_REQUIRE_FLUSHING (&coding
)))
4155 move_gap_both (PT
, PT_BYTE
);
4156 GAP_SIZE
+= inserted
;
4157 ZV_BYTE
-= inserted
;
4161 decode_coding_gap (&coding
, inserted
, inserted
);
4162 inserted
= coding
.produced_char
;
4163 coding_system
= CODING_ID_NAME (coding
.id
);
4165 else if (inserted
> 0)
4166 adjust_after_insert (PT
, PT_BYTE
, PT
+ inserted
, PT_BYTE
+ inserted
,
4169 /* Call after-change hooks for the inserted text, aside from the case
4170 of normal visiting (not with REPLACE), which is done in a new buffer
4171 "before" the buffer is changed. */
4172 if (inserted
> 0 && total
> 0
4173 && (NILP (visit
) || !NILP (replace
)))
4175 signal_after_change (PT
, 0, inserted
);
4176 update_compositions (PT
, PT
, CHECK_BORDER
);
4179 /* Now INSERTED is measured in characters. */
4183 if (deferred_remove_unwind_protect
)
4184 /* If requested above, discard the unwind protect for closing the
4190 if (!EQ (BVAR (current_buffer
, undo_list
), Qt
) && !nochange
)
4191 BVAR (current_buffer
, undo_list
) = Qnil
;
4195 current_buffer
->modtime
= st
.st_mtime
;
4196 current_buffer
->modtime_size
= st
.st_size
;
4197 BVAR (current_buffer
, filename
) = orig_filename
;
4200 SAVE_MODIFF
= MODIFF
;
4201 BUF_AUTOSAVE_MODIFF (current_buffer
) = MODIFF
;
4202 XSETFASTINT (BVAR (current_buffer
, save_length
), Z
- BEG
);
4203 #ifdef CLASH_DETECTION
4206 if (!NILP (BVAR (current_buffer
, file_truename
)))
4207 unlock_file (BVAR (current_buffer
, file_truename
));
4208 unlock_file (filename
);
4210 #endif /* CLASH_DETECTION */
4212 xsignal2 (Qfile_error
,
4213 build_string ("not a regular file"), orig_filename
);
4216 if (set_coding_system
)
4217 Vlast_coding_system_used
= coding_system
;
4219 if (! NILP (Ffboundp (Qafter_insert_file_set_coding
)))
4221 insval
= call2 (Qafter_insert_file_set_coding
, make_number (inserted
),
4223 if (! NILP (insval
))
4225 CHECK_NUMBER (insval
);
4226 inserted
= XFASTINT (insval
);
4230 /* Decode file format. */
4233 /* Don't run point motion or modification hooks when decoding. */
4234 int count1
= SPECPDL_INDEX ();
4235 EMACS_INT old_inserted
= inserted
;
4236 specbind (Qinhibit_point_motion_hooks
, Qt
);
4237 specbind (Qinhibit_modification_hooks
, Qt
);
4239 /* Save old undo list and don't record undo for decoding. */
4240 old_undo
= BVAR (current_buffer
, undo_list
);
4241 BVAR (current_buffer
, undo_list
) = Qt
;
4245 insval
= call3 (Qformat_decode
,
4246 Qnil
, make_number (inserted
), visit
);
4247 CHECK_NUMBER (insval
);
4248 inserted
= XFASTINT (insval
);
4252 /* If REPLACE is non-nil and we succeeded in not replacing the
4253 beginning or end of the buffer text with the file's contents,
4254 call format-decode with `point' positioned at the beginning
4255 of the buffer and `inserted' equaling the number of
4256 characters in the buffer. Otherwise, format-decode might
4257 fail to correctly analyze the beginning or end of the buffer.
4258 Hence we temporarily save `point' and `inserted' here and
4259 restore `point' iff format-decode did not insert or delete
4260 any text. Otherwise we leave `point' at point-min. */
4261 EMACS_INT opoint
= PT
;
4262 EMACS_INT opoint_byte
= PT_BYTE
;
4263 EMACS_INT oinserted
= ZV
- BEGV
;
4264 int ochars_modiff
= CHARS_MODIFF
;
4266 TEMP_SET_PT_BOTH (BEGV
, BEGV_BYTE
);
4267 insval
= call3 (Qformat_decode
,
4268 Qnil
, make_number (oinserted
), visit
);
4269 CHECK_NUMBER (insval
);
4270 if (ochars_modiff
== CHARS_MODIFF
)
4271 /* format_decode didn't modify buffer's characters => move
4272 point back to position before inserted text and leave
4273 value of inserted alone. */
4274 SET_PT_BOTH (opoint
, opoint_byte
);
4276 /* format_decode modified buffer's characters => consider
4277 entire buffer changed and leave point at point-min. */
4278 inserted
= XFASTINT (insval
);
4281 /* For consistency with format-decode call these now iff inserted > 0
4282 (martin 2007-06-28). */
4283 p
= Vafter_insert_file_functions
;
4288 insval
= call1 (XCAR (p
), make_number (inserted
));
4291 CHECK_NUMBER (insval
);
4292 inserted
= XFASTINT (insval
);
4297 /* For the rationale of this see the comment on
4298 format-decode above. */
4299 EMACS_INT opoint
= PT
;
4300 EMACS_INT opoint_byte
= PT_BYTE
;
4301 EMACS_INT oinserted
= ZV
- BEGV
;
4302 int ochars_modiff
= CHARS_MODIFF
;
4304 TEMP_SET_PT_BOTH (BEGV
, BEGV_BYTE
);
4305 insval
= call1 (XCAR (p
), make_number (oinserted
));
4308 CHECK_NUMBER (insval
);
4309 if (ochars_modiff
== CHARS_MODIFF
)
4310 /* after_insert_file_functions didn't modify
4311 buffer's characters => move point back to
4312 position before inserted text and leave value of
4314 SET_PT_BOTH (opoint
, opoint_byte
);
4316 /* after_insert_file_functions did modify buffer's
4317 characters => consider entire buffer changed and
4318 leave point at point-min. */
4319 inserted
= XFASTINT (insval
);
4329 BVAR (current_buffer
, undo_list
) = old_undo
;
4330 if (CONSP (old_undo
) && inserted
!= old_inserted
)
4332 /* Adjust the last undo record for the size change during
4333 the format conversion. */
4334 Lisp_Object tem
= XCAR (old_undo
);
4335 if (CONSP (tem
) && INTEGERP (XCAR (tem
))
4336 && INTEGERP (XCDR (tem
))
4337 && XFASTINT (XCDR (tem
)) == PT
+ old_inserted
)
4338 XSETCDR (tem
, make_number (PT
+ inserted
));
4342 /* If undo_list was Qt before, keep it that way.
4343 Otherwise start with an empty undo_list. */
4344 BVAR (current_buffer
, undo_list
) = EQ (old_undo
, Qt
) ? Qt
: Qnil
;
4346 unbind_to (count1
, Qnil
);
4350 && current_buffer
->modtime
== -1)
4352 /* If visiting nonexistent file, return nil. */
4354 report_file_error ("Opening input file", Fcons (orig_filename
, Qnil
));
4358 Fsignal (Qquit
, Qnil
);
4360 /* ??? Retval needs to be dealt with in all cases consistently. */
4362 val
= Fcons (orig_filename
,
4363 Fcons (make_number (inserted
),
4366 RETURN_UNGCPRO (unbind_to (count
, val
));
4369 static Lisp_Object
build_annotations (Lisp_Object
, Lisp_Object
);
4372 build_annotations_unwind (Lisp_Object arg
)
4374 Vwrite_region_annotation_buffers
= arg
;
4378 /* Decide the coding-system to encode the data with. */
4381 choose_write_coding_system (Lisp_Object start
, Lisp_Object end
, Lisp_Object filename
,
4382 Lisp_Object append
, Lisp_Object visit
, Lisp_Object lockname
,
4383 struct coding_system
*coding
)
4386 Lisp_Object eol_parent
= Qnil
;
4389 && NILP (Fstring_equal (BVAR (current_buffer
, filename
),
4390 BVAR (current_buffer
, auto_save_file_name
))))
4395 else if (!NILP (Vcoding_system_for_write
))
4397 val
= Vcoding_system_for_write
;
4398 if (coding_system_require_warning
4399 && !NILP (Ffboundp (Vselect_safe_coding_system_function
)))
4400 /* Confirm that VAL can surely encode the current region. */
4401 val
= call5 (Vselect_safe_coding_system_function
,
4402 start
, end
, Fcons (Qt
, Fcons (val
, Qnil
)),
4407 /* If the variable `buffer-file-coding-system' is set locally,
4408 it means that the file was read with some kind of code
4409 conversion or the variable is explicitly set by users. We
4410 had better write it out with the same coding system even if
4411 `enable-multibyte-characters' is nil.
4413 If it is not set locally, we anyway have to convert EOL
4414 format if the default value of `buffer-file-coding-system'
4415 tells that it is not Unix-like (LF only) format. */
4416 int using_default_coding
= 0;
4417 int force_raw_text
= 0;
4419 val
= BVAR (current_buffer
, buffer_file_coding_system
);
4421 || NILP (Flocal_variable_p (Qbuffer_file_coding_system
, Qnil
)))
4424 if (NILP (BVAR (current_buffer
, enable_multibyte_characters
)))
4430 /* Check file-coding-system-alist. */
4431 Lisp_Object args
[7], coding_systems
;
4433 args
[0] = Qwrite_region
; args
[1] = start
; args
[2] = end
;
4434 args
[3] = filename
; args
[4] = append
; args
[5] = visit
;
4436 coding_systems
= Ffind_operation_coding_system (7, args
);
4437 if (CONSP (coding_systems
) && !NILP (XCDR (coding_systems
)))
4438 val
= XCDR (coding_systems
);
4443 /* If we still have not decided a coding system, use the
4444 default value of buffer-file-coding-system. */
4445 val
= BVAR (current_buffer
, buffer_file_coding_system
);
4446 using_default_coding
= 1;
4449 if (! NILP (val
) && ! force_raw_text
)
4451 Lisp_Object spec
, attrs
;
4453 CHECK_CODING_SYSTEM_GET_SPEC (val
, spec
);
4454 attrs
= AREF (spec
, 0);
4455 if (EQ (CODING_ATTR_TYPE (attrs
), Qraw_text
))
4460 && !NILP (Ffboundp (Vselect_safe_coding_system_function
)))
4461 /* Confirm that VAL can surely encode the current region. */
4462 val
= call5 (Vselect_safe_coding_system_function
,
4463 start
, end
, val
, Qnil
, filename
);
4465 /* If the decided coding-system doesn't specify end-of-line
4466 format, we use that of
4467 `default-buffer-file-coding-system'. */
4468 if (! using_default_coding
4469 && ! NILP (BVAR (&buffer_defaults
, buffer_file_coding_system
)))
4470 val
= (coding_inherit_eol_type
4471 (val
, BVAR (&buffer_defaults
, buffer_file_coding_system
)));
4473 /* If we decide not to encode text, use `raw-text' or one of its
4476 val
= raw_text_coding_system (val
);
4479 val
= coding_inherit_eol_type (val
, eol_parent
);
4480 setup_coding_system (val
, coding
);
4482 if (!STRINGP (start
) && !NILP (BVAR (current_buffer
, selective_display
)))
4483 coding
->mode
|= CODING_MODE_SELECTIVE_DISPLAY
;
4487 DEFUN ("write-region", Fwrite_region
, Swrite_region
, 3, 7,
4488 "r\nFWrite region to file: \ni\ni\ni\np",
4489 doc
: /* Write current region into specified file.
4490 When called from a program, requires three arguments:
4491 START, END and FILENAME. START and END are normally buffer positions
4492 specifying the part of the buffer to write.
4493 If START is nil, that means to use the entire buffer contents.
4494 If START is a string, then output that string to the file
4495 instead of any buffer contents; END is ignored.
4497 Optional fourth argument APPEND if non-nil means
4498 append to existing file contents (if any). If it is an integer,
4499 seek to that offset in the file before writing.
4500 Optional fifth argument VISIT, if t or a string, means
4501 set the last-save-file-modtime of buffer to this file's modtime
4502 and mark buffer not modified.
4503 If VISIT is a string, it is a second file name;
4504 the output goes to FILENAME, but the buffer is marked as visiting VISIT.
4505 VISIT is also the file name to lock and unlock for clash detection.
4506 If VISIT is neither t nor nil nor a string,
4507 that means do not display the \"Wrote file\" message.
4508 The optional sixth arg LOCKNAME, if non-nil, specifies the name to
4509 use for locking and unlocking, overriding FILENAME and VISIT.
4510 The optional seventh arg MUSTBENEW, if non-nil, insists on a check
4511 for an existing file with the same name. If MUSTBENEW is `excl',
4512 that means to get an error if the file already exists; never overwrite.
4513 If MUSTBENEW is neither nil nor `excl', that means ask for
4514 confirmation before overwriting, but do go ahead and overwrite the file
4515 if the user confirms.
4517 This does code conversion according to the value of
4518 `coding-system-for-write', `buffer-file-coding-system', or
4519 `file-coding-system-alist', and sets the variable
4520 `last-coding-system-used' to the coding system actually used.
4522 This calls `write-region-annotate-functions' at the start, and
4523 `write-region-post-annotation-function' at the end. */)
4524 (Lisp_Object start
, Lisp_Object end
, Lisp_Object filename
, Lisp_Object append
, Lisp_Object visit
, Lisp_Object lockname
, Lisp_Object mustbenew
)
4531 int count
= SPECPDL_INDEX ();
4533 Lisp_Object handler
;
4534 Lisp_Object visit_file
;
4535 Lisp_Object annotations
;
4536 Lisp_Object encoded_filename
;
4537 int visiting
= (EQ (visit
, Qt
) || STRINGP (visit
));
4538 int quietly
= !NILP (visit
);
4539 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
, gcpro5
;
4540 struct buffer
*given_buffer
;
4541 struct coding_system coding
;
4543 if (current_buffer
->base_buffer
&& visiting
)
4544 error ("Cannot do file visiting in an indirect buffer");
4546 if (!NILP (start
) && !STRINGP (start
))
4547 validate_region (&start
, &end
);
4550 GCPRO5 (start
, filename
, visit
, visit_file
, lockname
);
4552 filename
= Fexpand_file_name (filename
, Qnil
);
4554 if (!NILP (mustbenew
) && !EQ (mustbenew
, Qexcl
))
4555 barf_or_query_if_file_exists (filename
, "overwrite", 1, 0, 1);
4557 if (STRINGP (visit
))
4558 visit_file
= Fexpand_file_name (visit
, Qnil
);
4560 visit_file
= filename
;
4562 if (NILP (lockname
))
4563 lockname
= visit_file
;
4567 /* If the file name has special constructs in it,
4568 call the corresponding file handler. */
4569 handler
= Ffind_file_name_handler (filename
, Qwrite_region
);
4570 /* If FILENAME has no handler, see if VISIT has one. */
4571 if (NILP (handler
) && STRINGP (visit
))
4572 handler
= Ffind_file_name_handler (visit
, Qwrite_region
);
4574 if (!NILP (handler
))
4577 val
= call6 (handler
, Qwrite_region
, start
, end
,
4578 filename
, append
, visit
);
4582 SAVE_MODIFF
= MODIFF
;
4583 XSETFASTINT (BVAR (current_buffer
, save_length
), Z
- BEG
);
4584 BVAR (current_buffer
, filename
) = visit_file
;
4590 record_unwind_protect (save_restriction_restore
, save_restriction_save ());
4592 /* Special kludge to simplify auto-saving. */
4595 /* Do it later, so write-region-annotate-function can work differently
4596 if we save "the buffer" vs "a region".
4597 This is useful in tar-mode. --Stef
4598 XSETFASTINT (start, BEG);
4599 XSETFASTINT (end, Z); */
4603 record_unwind_protect (build_annotations_unwind
,
4604 Vwrite_region_annotation_buffers
);
4605 Vwrite_region_annotation_buffers
= Fcons (Fcurrent_buffer (), Qnil
);
4606 count1
= SPECPDL_INDEX ();
4608 given_buffer
= current_buffer
;
4610 if (!STRINGP (start
))
4612 annotations
= build_annotations (start
, end
);
4614 if (current_buffer
!= given_buffer
)
4616 XSETFASTINT (start
, BEGV
);
4617 XSETFASTINT (end
, ZV
);
4623 XSETFASTINT (start
, BEGV
);
4624 XSETFASTINT (end
, ZV
);
4629 GCPRO5 (start
, filename
, annotations
, visit_file
, lockname
);
4631 /* Decide the coding-system to encode the data with.
4632 We used to make this choice before calling build_annotations, but that
4633 leads to problems when a write-annotate-function takes care of
4634 unsavable chars (as was the case with X-Symbol). */
4635 Vlast_coding_system_used
4636 = choose_write_coding_system (start
, end
, filename
,
4637 append
, visit
, lockname
, &coding
);
4639 #ifdef CLASH_DETECTION
4641 lock_file (lockname
);
4642 #endif /* CLASH_DETECTION */
4644 encoded_filename
= ENCODE_FILE (filename
);
4646 fn
= SSDATA (encoded_filename
);
4650 desc
= emacs_open (fn
, O_WRONLY
| O_BINARY
, 0);
4651 #else /* not DOS_NT */
4652 desc
= emacs_open (fn
, O_WRONLY
, 0);
4653 #endif /* not DOS_NT */
4655 if (desc
< 0 && (NILP (append
) || errno
== ENOENT
))
4657 desc
= emacs_open (fn
,
4658 O_WRONLY
| O_CREAT
| O_BINARY
4659 | (EQ (mustbenew
, Qexcl
) ? O_EXCL
: O_TRUNC
),
4660 S_IREAD
| S_IWRITE
);
4661 #else /* not DOS_NT */
4662 desc
= emacs_open (fn
, O_WRONLY
| O_TRUNC
| O_CREAT
4663 | (EQ (mustbenew
, Qexcl
) ? O_EXCL
: 0),
4664 auto_saving
? auto_save_mode_bits
: 0666);
4665 #endif /* not DOS_NT */
4669 #ifdef CLASH_DETECTION
4671 if (!auto_saving
) unlock_file (lockname
);
4673 #endif /* CLASH_DETECTION */
4675 report_file_error ("Opening output file", Fcons (filename
, Qnil
));
4678 record_unwind_protect (close_file_unwind
, make_number (desc
));
4680 if (!NILP (append
) && !NILP (Ffile_regular_p (filename
)))
4684 if (NUMBERP (append
))
4685 ret
= emacs_lseek (desc
, XINT (append
), SEEK_CUR
);
4687 ret
= lseek (desc
, 0, SEEK_END
);
4690 #ifdef CLASH_DETECTION
4692 if (!auto_saving
) unlock_file (lockname
);
4694 #endif /* CLASH_DETECTION */
4696 report_file_error ("Lseek error", Fcons (filename
, Qnil
));
4705 if (STRINGP (start
))
4707 failure
= 0 > a_write (desc
, start
, 0, SCHARS (start
),
4708 &annotations
, &coding
);
4711 else if (XINT (start
) != XINT (end
))
4713 failure
= 0 > a_write (desc
, Qnil
,
4714 XINT (start
), XINT (end
) - XINT (start
),
4715 &annotations
, &coding
);
4720 /* If file was empty, still need to write the annotations */
4721 coding
.mode
|= CODING_MODE_LAST_BLOCK
;
4722 failure
= 0 > a_write (desc
, Qnil
, XINT (end
), 0, &annotations
, &coding
);
4726 if (CODING_REQUIRE_FLUSHING (&coding
)
4727 && !(coding
.mode
& CODING_MODE_LAST_BLOCK
)
4730 /* We have to flush out a data. */
4731 coding
.mode
|= CODING_MODE_LAST_BLOCK
;
4732 failure
= 0 > e_write (desc
, Qnil
, 1, 1, &coding
);
4739 /* Note fsync appears to change the modtime on BSD4.2 (both vax and sun).
4740 Disk full in NFS may be reported here. */
4741 /* mib says that closing the file will try to write as fast as NFS can do
4742 it, and that means the fsync here is not crucial for autosave files. */
4743 if (!auto_saving
&& !write_region_inhibit_fsync
&& fsync (desc
) < 0)
4745 /* If fsync fails with EINTR, don't treat that as serious. Also
4746 ignore EINVAL which happens when fsync is not supported on this
4748 if (errno
!= EINTR
&& errno
!= EINVAL
)
4749 failure
= 1, save_errno
= errno
;
4753 /* NFS can report a write failure now. */
4754 if (emacs_close (desc
) < 0)
4755 failure
= 1, save_errno
= errno
;
4759 /* Discard the unwind protect for close_file_unwind. */
4760 specpdl_ptr
= specpdl
+ count1
;
4762 /* Call write-region-post-annotation-function. */
4763 while (CONSP (Vwrite_region_annotation_buffers
))
4765 Lisp_Object buf
= XCAR (Vwrite_region_annotation_buffers
);
4766 if (!NILP (Fbuffer_live_p (buf
)))
4769 if (FUNCTIONP (Vwrite_region_post_annotation_function
))
4770 call0 (Vwrite_region_post_annotation_function
);
4772 Vwrite_region_annotation_buffers
4773 = XCDR (Vwrite_region_annotation_buffers
);
4776 unbind_to (count
, Qnil
);
4778 #ifdef CLASH_DETECTION
4780 unlock_file (lockname
);
4781 #endif /* CLASH_DETECTION */
4783 /* Do this before reporting IO error
4784 to avoid a "file has changed on disk" warning on
4785 next attempt to save. */
4788 current_buffer
->modtime
= st
.st_mtime
;
4789 current_buffer
->modtime_size
= st
.st_size
;
4793 error ("IO error writing %s: %s", SDATA (filename
),
4794 emacs_strerror (save_errno
));
4798 SAVE_MODIFF
= MODIFF
;
4799 XSETFASTINT (BVAR (current_buffer
, save_length
), Z
- BEG
);
4800 BVAR (current_buffer
, filename
) = visit_file
;
4801 update_mode_lines
++;
4806 && ! NILP (Fstring_equal (BVAR (current_buffer
, filename
),
4807 BVAR (current_buffer
, auto_save_file_name
))))
4808 SAVE_MODIFF
= MODIFF
;
4814 message_with_string ((INTEGERP (append
)
4824 Lisp_Object
merge (Lisp_Object
, Lisp_Object
, Lisp_Object
);
4826 DEFUN ("car-less-than-car", Fcar_less_than_car
, Scar_less_than_car
, 2, 2, 0,
4827 doc
: /* Return t if (car A) is numerically less than (car B). */)
4828 (Lisp_Object a
, Lisp_Object b
)
4830 return Flss (Fcar (a
), Fcar (b
));
4833 /* Build the complete list of annotations appropriate for writing out
4834 the text between START and END, by calling all the functions in
4835 write-region-annotate-functions and merging the lists they return.
4836 If one of these functions switches to a different buffer, we assume
4837 that buffer contains altered text. Therefore, the caller must
4838 make sure to restore the current buffer in all cases,
4839 as save-excursion would do. */
4842 build_annotations (Lisp_Object start
, Lisp_Object end
)
4844 Lisp_Object annotations
;
4846 struct gcpro gcpro1
, gcpro2
;
4847 Lisp_Object original_buffer
;
4848 int i
, used_global
= 0;
4850 XSETBUFFER (original_buffer
, current_buffer
);
4853 p
= Vwrite_region_annotate_functions
;
4854 GCPRO2 (annotations
, p
);
4857 struct buffer
*given_buffer
= current_buffer
;
4858 if (EQ (Qt
, XCAR (p
)) && !used_global
)
4859 { /* Use the global value of the hook. */
4862 arg
[0] = Fdefault_value (Qwrite_region_annotate_functions
);
4864 p
= Fappend (2, arg
);
4867 Vwrite_region_annotations_so_far
= annotations
;
4868 res
= call2 (XCAR (p
), start
, end
);
4869 /* If the function makes a different buffer current,
4870 assume that means this buffer contains altered text to be output.
4871 Reset START and END from the buffer bounds
4872 and discard all previous annotations because they should have
4873 been dealt with by this function. */
4874 if (current_buffer
!= given_buffer
)
4876 Vwrite_region_annotation_buffers
4877 = Fcons (Fcurrent_buffer (),
4878 Vwrite_region_annotation_buffers
);
4879 XSETFASTINT (start
, BEGV
);
4880 XSETFASTINT (end
, ZV
);
4883 Flength (res
); /* Check basic validity of return value */
4884 annotations
= merge (annotations
, res
, Qcar_less_than_car
);
4888 /* Now do the same for annotation functions implied by the file-format */
4889 if (auto_saving
&& (!EQ (BVAR (current_buffer
, auto_save_file_format
), Qt
)))
4890 p
= BVAR (current_buffer
, auto_save_file_format
);
4892 p
= BVAR (current_buffer
, file_format
);
4893 for (i
= 0; CONSP (p
); p
= XCDR (p
), ++i
)
4895 struct buffer
*given_buffer
= current_buffer
;
4897 Vwrite_region_annotations_so_far
= annotations
;
4899 /* Value is either a list of annotations or nil if the function
4900 has written annotations to a temporary buffer, which is now
4902 res
= call5 (Qformat_annotate_function
, XCAR (p
), start
, end
,
4903 original_buffer
, make_number (i
));
4904 if (current_buffer
!= given_buffer
)
4906 XSETFASTINT (start
, BEGV
);
4907 XSETFASTINT (end
, ZV
);
4912 annotations
= merge (annotations
, res
, Qcar_less_than_car
);
4920 /* Write to descriptor DESC the NCHARS chars starting at POS of STRING.
4921 If STRING is nil, POS is the character position in the current buffer.
4922 Intersperse with them the annotations from *ANNOT
4923 which fall within the range of POS to POS + NCHARS,
4924 each at its appropriate position.
4926 We modify *ANNOT by discarding elements as we use them up.
4928 The return value is negative in case of system call failure. */
4931 a_write (int desc
, Lisp_Object string
, EMACS_INT pos
,
4932 register EMACS_INT nchars
, Lisp_Object
*annot
,
4933 struct coding_system
*coding
)
4937 EMACS_INT lastpos
= pos
+ nchars
;
4939 while (NILP (*annot
) || CONSP (*annot
))
4941 tem
= Fcar_safe (Fcar (*annot
));
4944 nextpos
= XFASTINT (tem
);
4946 /* If there are no more annotations in this range,
4947 output the rest of the range all at once. */
4948 if (! (nextpos
>= pos
&& nextpos
<= lastpos
))
4949 return e_write (desc
, string
, pos
, lastpos
, coding
);
4951 /* Output buffer text up to the next annotation's position. */
4954 if (0 > e_write (desc
, string
, pos
, nextpos
, coding
))
4958 /* Output the annotation. */
4959 tem
= Fcdr (Fcar (*annot
));
4962 if (0 > e_write (desc
, tem
, 0, SCHARS (tem
), coding
))
4965 *annot
= Fcdr (*annot
);
4971 /* Write text in the range START and END into descriptor DESC,
4972 encoding them with coding system CODING. If STRING is nil, START
4973 and END are character positions of the current buffer, else they
4974 are indexes to the string STRING. */
4977 e_write (int desc
, Lisp_Object string
, EMACS_INT start
, EMACS_INT end
,
4978 struct coding_system
*coding
)
4980 if (STRINGP (string
))
4983 end
= SCHARS (string
);
4986 /* We used to have a code for handling selective display here. But,
4987 now it is handled within encode_coding. */
4991 if (STRINGP (string
))
4993 coding
->src_multibyte
= SCHARS (string
) < SBYTES (string
);
4994 if (CODING_REQUIRE_ENCODING (coding
))
4996 encode_coding_object (coding
, string
,
4997 start
, string_char_to_byte (string
, start
),
4998 end
, string_char_to_byte (string
, end
), Qt
);
5002 coding
->dst_object
= string
;
5003 coding
->consumed_char
= SCHARS (string
);
5004 coding
->produced
= SBYTES (string
);
5009 EMACS_INT start_byte
= CHAR_TO_BYTE (start
);
5010 EMACS_INT end_byte
= CHAR_TO_BYTE (end
);
5012 coding
->src_multibyte
= (end
- start
) < (end_byte
- start_byte
);
5013 if (CODING_REQUIRE_ENCODING (coding
))
5015 encode_coding_object (coding
, Fcurrent_buffer (),
5016 start
, start_byte
, end
, end_byte
, Qt
);
5020 coding
->dst_object
= Qnil
;
5021 coding
->dst_pos_byte
= start_byte
;
5022 if (start
>= GPT
|| end
<= GPT
)
5024 coding
->consumed_char
= end
- start
;
5025 coding
->produced
= end_byte
- start_byte
;
5029 coding
->consumed_char
= GPT
- start
;
5030 coding
->produced
= GPT_BYTE
- start_byte
;
5035 if (coding
->produced
> 0)
5039 STRINGP (coding
->dst_object
)
5040 ? SSDATA (coding
->dst_object
)
5041 : (char *) BYTE_POS_ADDR (coding
->dst_pos_byte
),
5044 if (coding
->produced
)
5047 start
+= coding
->consumed_char
;
5053 DEFUN ("verify-visited-file-modtime", Fverify_visited_file_modtime
,
5054 Sverify_visited_file_modtime
, 0, 1, 0,
5055 doc
: /* Return t if last mod time of BUF's visited file matches what BUF records.
5056 This means that the file has not been changed since it was visited or saved.
5057 If BUF is omitted or nil, it defaults to the current buffer.
5058 See Info node `(elisp)Modification Time' for more details. */)
5063 Lisp_Object handler
;
5064 Lisp_Object filename
;
5074 if (!STRINGP (BVAR (b
, filename
))) return Qt
;
5075 if (b
->modtime
== 0) return Qt
;
5077 /* If the file name has special constructs in it,
5078 call the corresponding file handler. */
5079 handler
= Ffind_file_name_handler (BVAR (b
, filename
),
5080 Qverify_visited_file_modtime
);
5081 if (!NILP (handler
))
5082 return call2 (handler
, Qverify_visited_file_modtime
, buf
);
5084 filename
= ENCODE_FILE (BVAR (b
, filename
));
5086 if (stat (SSDATA (filename
), &st
) < 0)
5088 /* If the file doesn't exist now and didn't exist before,
5089 we say that it isn't modified, provided the error is a tame one. */
5090 if (errno
== ENOENT
|| errno
== EACCES
|| errno
== ENOTDIR
)
5095 if ((st
.st_mtime
== b
->modtime
5096 /* If both are positive, accept them if they are off by one second. */
5097 || (st
.st_mtime
> 0 && b
->modtime
> 0
5098 && (st
.st_mtime
- 1 == b
->modtime
5099 || st
.st_mtime
== b
->modtime
- 1)))
5100 && (st
.st_size
== b
->modtime_size
5101 || b
->modtime_size
< 0))
5106 DEFUN ("clear-visited-file-modtime", Fclear_visited_file_modtime
,
5107 Sclear_visited_file_modtime
, 0, 0, 0,
5108 doc
: /* Clear out records of last mod time of visited file.
5109 Next attempt to save will certainly not complain of a discrepancy. */)
5112 current_buffer
->modtime
= 0;
5113 current_buffer
->modtime_size
= -1;
5117 DEFUN ("visited-file-modtime", Fvisited_file_modtime
,
5118 Svisited_file_modtime
, 0, 0, 0,
5119 doc
: /* Return the current buffer's recorded visited file modification time.
5120 The value is a list of the form (HIGH LOW), like the time values that
5121 `file-attributes' returns. If the current buffer has no recorded file
5122 modification time, this function returns 0. If the visited file
5123 doesn't exist, HIGH will be -1.
5124 See Info node `(elisp)Modification Time' for more details. */)
5127 if (! current_buffer
->modtime
)
5128 return make_number (0);
5129 return make_time (current_buffer
->modtime
);
5132 DEFUN ("set-visited-file-modtime", Fset_visited_file_modtime
,
5133 Sset_visited_file_modtime
, 0, 1, 0,
5134 doc
: /* Update buffer's recorded modification time from the visited file's time.
5135 Useful if the buffer was not read from the file normally
5136 or if the file itself has been changed for some known benign reason.
5137 An argument specifies the modification time value to use
5138 \(instead of that of the visited file), in the form of a list
5139 \(HIGH . LOW) or (HIGH LOW). */)
5140 (Lisp_Object time_list
)
5142 if (!NILP (time_list
))
5144 CONS_TO_INTEGER (time_list
, time_t, current_buffer
->modtime
);
5145 current_buffer
->modtime_size
= -1;
5149 register Lisp_Object filename
;
5151 Lisp_Object handler
;
5153 filename
= Fexpand_file_name (BVAR (current_buffer
, filename
), Qnil
);
5155 /* If the file name has special constructs in it,
5156 call the corresponding file handler. */
5157 handler
= Ffind_file_name_handler (filename
, Qset_visited_file_modtime
);
5158 if (!NILP (handler
))
5159 /* The handler can find the file name the same way we did. */
5160 return call2 (handler
, Qset_visited_file_modtime
, Qnil
);
5162 filename
= ENCODE_FILE (filename
);
5164 if (stat (SSDATA (filename
), &st
) >= 0)
5166 current_buffer
->modtime
= st
.st_mtime
;
5167 current_buffer
->modtime_size
= st
.st_size
;
5175 auto_save_error (Lisp_Object error_val
)
5177 Lisp_Object args
[3], msg
;
5179 struct gcpro gcpro1
;
5183 auto_save_error_occurred
= 1;
5185 ring_bell (XFRAME (selected_frame
));
5187 args
[0] = build_string ("Auto-saving %s: %s");
5188 args
[1] = BVAR (current_buffer
, name
);
5189 args
[2] = Ferror_message_string (error_val
);
5190 msg
= Fformat (3, args
);
5192 nbytes
= SBYTES (msg
);
5193 SAFE_ALLOCA (msgbuf
, char *, nbytes
);
5194 memcpy (msgbuf
, SDATA (msg
), nbytes
);
5196 for (i
= 0; i
< 3; ++i
)
5199 message2 (msgbuf
, nbytes
, STRING_MULTIBYTE (msg
));
5201 message2_nolog (msgbuf
, nbytes
, STRING_MULTIBYTE (msg
));
5202 Fsleep_for (make_number (1), Qnil
);
5216 auto_save_mode_bits
= 0666;
5218 /* Get visited file's mode to become the auto save file's mode. */
5219 if (! NILP (BVAR (current_buffer
, filename
)))
5221 if (stat (SSDATA (BVAR (current_buffer
, filename
)), &st
) >= 0)
5222 /* But make sure we can overwrite it later! */
5223 auto_save_mode_bits
= (st
.st_mode
| 0600) & 0777;
5224 else if ((modes
= Ffile_modes (BVAR (current_buffer
, filename
)),
5226 /* Remote files don't cooperate with stat. */
5227 auto_save_mode_bits
= (XINT (modes
) | 0600) & 0777;
5231 Fwrite_region (Qnil
, Qnil
, BVAR (current_buffer
, auto_save_file_name
), Qnil
,
5232 NILP (Vauto_save_visited_file_name
) ? Qlambda
: Qt
,
5237 do_auto_save_unwind (Lisp_Object arg
) /* used as unwind-protect function */
5240 FILE *stream
= (FILE *) XSAVE_VALUE (arg
)->pointer
;
5252 do_auto_save_unwind_1 (Lisp_Object value
) /* used as unwind-protect function */
5255 minibuffer_auto_raise
= XINT (value
);
5260 do_auto_save_make_dir (Lisp_Object dir
)
5264 auto_saving_dir_umask
= 077;
5265 result
= call2 (Qmake_directory
, dir
, Qt
);
5266 auto_saving_dir_umask
= 0;
5271 do_auto_save_eh (Lisp_Object ignore
)
5273 auto_saving_dir_umask
= 0;
5277 DEFUN ("do-auto-save", Fdo_auto_save
, Sdo_auto_save
, 0, 2, "",
5278 doc
: /* Auto-save all buffers that need it.
5279 This is all buffers that have auto-saving enabled
5280 and are changed since last auto-saved.
5281 Auto-saving writes the buffer into a file
5282 so that your editing is not lost if the system crashes.
5283 This file is not the file you visited; that changes only when you save.
5284 Normally we run the normal hook `auto-save-hook' before saving.
5286 A non-nil NO-MESSAGE argument means do not print any message if successful.
5287 A non-nil CURRENT-ONLY argument means save only current buffer. */)
5288 (Lisp_Object no_message
, Lisp_Object current_only
)
5290 struct buffer
*old
= current_buffer
, *b
;
5291 Lisp_Object tail
, buf
, hook
;
5293 int do_handled_files
;
5295 FILE *stream
= NULL
;
5296 int count
= SPECPDL_INDEX ();
5297 int orig_minibuffer_auto_raise
= minibuffer_auto_raise
;
5298 int old_message_p
= 0;
5299 struct gcpro gcpro1
, gcpro2
;
5301 if (max_specpdl_size
< specpdl_size
+ 40)
5302 max_specpdl_size
= specpdl_size
+ 40;
5307 if (NILP (no_message
))
5309 old_message_p
= push_message ();
5310 record_unwind_protect (pop_message_unwind
, Qnil
);
5313 /* Ordinarily don't quit within this function,
5314 but don't make it impossible to quit (in case we get hung in I/O). */
5318 /* No GCPRO needed, because (when it matters) all Lisp_Object variables
5319 point to non-strings reached from Vbuffer_alist. */
5321 hook
= intern ("auto-save-hook");
5322 Frun_hooks (1, &hook
);
5324 if (STRINGP (Vauto_save_list_file_name
))
5326 Lisp_Object listfile
;
5328 listfile
= Fexpand_file_name (Vauto_save_list_file_name
, Qnil
);
5330 /* Don't try to create the directory when shutting down Emacs,
5331 because creating the directory might signal an error, and
5332 that would leave Emacs in a strange state. */
5333 if (!NILP (Vrun_hooks
))
5337 GCPRO2 (dir
, listfile
);
5338 dir
= Ffile_name_directory (listfile
);
5339 if (NILP (Ffile_directory_p (dir
)))
5340 internal_condition_case_1 (do_auto_save_make_dir
,
5346 stream
= fopen (SSDATA (listfile
), "w");
5349 record_unwind_protect (do_auto_save_unwind
,
5350 make_save_value (stream
, 0));
5351 record_unwind_protect (do_auto_save_unwind_1
,
5352 make_number (minibuffer_auto_raise
));
5353 minibuffer_auto_raise
= 0;
5355 auto_save_error_occurred
= 0;
5357 /* On first pass, save all files that don't have handlers.
5358 On second pass, save all files that do have handlers.
5360 If Emacs is crashing, the handlers may tweak what is causing
5361 Emacs to crash in the first place, and it would be a shame if
5362 Emacs failed to autosave perfectly ordinary files because it
5363 couldn't handle some ange-ftp'd file. */
5365 for (do_handled_files
= 0; do_handled_files
< 2; do_handled_files
++)
5366 for (tail
= Vbuffer_alist
; CONSP (tail
); tail
= XCDR (tail
))
5368 buf
= XCDR (XCAR (tail
));
5371 /* Record all the buffers that have auto save mode
5372 in the special file that lists them. For each of these buffers,
5373 Record visited name (if any) and auto save name. */
5374 if (STRINGP (BVAR (b
, auto_save_file_name
))
5375 && stream
!= NULL
&& do_handled_files
== 0)
5378 if (!NILP (BVAR (b
, filename
)))
5380 fwrite (SDATA (BVAR (b
, filename
)), 1,
5381 SBYTES (BVAR (b
, filename
)), stream
);
5383 putc ('\n', stream
);
5384 fwrite (SDATA (BVAR (b
, auto_save_file_name
)), 1,
5385 SBYTES (BVAR (b
, auto_save_file_name
)), stream
);
5386 putc ('\n', stream
);
5390 if (!NILP (current_only
)
5391 && b
!= current_buffer
)
5394 /* Don't auto-save indirect buffers.
5395 The base buffer takes care of it. */
5399 /* Check for auto save enabled
5400 and file changed since last auto save
5401 and file changed since last real save. */
5402 if (STRINGP (BVAR (b
, auto_save_file_name
))
5403 && BUF_SAVE_MODIFF (b
) < BUF_MODIFF (b
)
5404 && BUF_AUTOSAVE_MODIFF (b
) < BUF_MODIFF (b
)
5405 /* -1 means we've turned off autosaving for a while--see below. */
5406 && XINT (BVAR (b
, save_length
)) >= 0
5407 && (do_handled_files
5408 || NILP (Ffind_file_name_handler (BVAR (b
, auto_save_file_name
),
5411 EMACS_TIME before_time
, after_time
;
5413 EMACS_GET_TIME (before_time
);
5415 /* If we had a failure, don't try again for 20 minutes. */
5416 if (b
->auto_save_failure_time
> 0
5417 && EMACS_SECS (before_time
) - b
->auto_save_failure_time
< 1200)
5420 set_buffer_internal (b
);
5421 if (NILP (Vauto_save_include_big_deletions
)
5422 && (XFASTINT (BVAR (b
, save_length
)) * 10
5423 > (BUF_Z (b
) - BUF_BEG (b
)) * 13)
5424 /* A short file is likely to change a large fraction;
5425 spare the user annoying messages. */
5426 && XFASTINT (BVAR (b
, save_length
)) > 5000
5427 /* These messages are frequent and annoying for `*mail*'. */
5428 && !EQ (BVAR (b
, filename
), Qnil
)
5429 && NILP (no_message
))
5431 /* It has shrunk too much; turn off auto-saving here. */
5432 minibuffer_auto_raise
= orig_minibuffer_auto_raise
;
5433 message_with_string ("Buffer %s has shrunk a lot; auto save disabled in that buffer until next real save",
5435 minibuffer_auto_raise
= 0;
5436 /* Turn off auto-saving until there's a real save,
5437 and prevent any more warnings. */
5438 XSETINT (BVAR (b
, save_length
), -1);
5439 Fsleep_for (make_number (1), Qnil
);
5442 if (!auto_saved
&& NILP (no_message
))
5443 message1 ("Auto-saving...");
5444 internal_condition_case (auto_save_1
, Qt
, auto_save_error
);
5446 BUF_AUTOSAVE_MODIFF (b
) = BUF_MODIFF (b
);
5447 XSETFASTINT (BVAR (current_buffer
, save_length
), Z
- BEG
);
5448 set_buffer_internal (old
);
5450 EMACS_GET_TIME (after_time
);
5452 /* If auto-save took more than 60 seconds,
5453 assume it was an NFS failure that got a timeout. */
5454 if (EMACS_SECS (after_time
) - EMACS_SECS (before_time
) > 60)
5455 b
->auto_save_failure_time
= EMACS_SECS (after_time
);
5459 /* Prevent another auto save till enough input events come in. */
5460 record_auto_save ();
5462 if (auto_saved
&& NILP (no_message
))
5466 /* If we are going to restore an old message,
5467 give time to read ours. */
5468 sit_for (make_number (1), 0, 0);
5471 else if (!auto_save_error_occurred
)
5472 /* Don't overwrite the error message if an error occurred.
5473 If we displayed a message and then restored a state
5474 with no message, leave a "done" message on the screen. */
5475 message1 ("Auto-saving...done");
5480 /* This restores the message-stack status. */
5481 unbind_to (count
, Qnil
);
5485 DEFUN ("set-buffer-auto-saved", Fset_buffer_auto_saved
,
5486 Sset_buffer_auto_saved
, 0, 0, 0,
5487 doc
: /* Mark current buffer as auto-saved with its current text.
5488 No auto-save file will be written until the buffer changes again. */)
5491 /* FIXME: This should not be called in indirect buffers, since
5492 they're not autosaved. */
5493 BUF_AUTOSAVE_MODIFF (current_buffer
) = MODIFF
;
5494 XSETFASTINT (BVAR (current_buffer
, save_length
), Z
- BEG
);
5495 current_buffer
->auto_save_failure_time
= 0;
5499 DEFUN ("clear-buffer-auto-save-failure", Fclear_buffer_auto_save_failure
,
5500 Sclear_buffer_auto_save_failure
, 0, 0, 0,
5501 doc
: /* Clear any record of a recent auto-save failure in the current buffer. */)
5504 current_buffer
->auto_save_failure_time
= 0;
5508 DEFUN ("recent-auto-save-p", Frecent_auto_save_p
, Srecent_auto_save_p
,
5510 doc
: /* Return t if current buffer has been auto-saved recently.
5511 More precisely, if it has been auto-saved since last read from or saved
5512 in the visited file. If the buffer has no visited file,
5513 then any auto-save counts as "recent". */)
5516 /* FIXME: maybe we should return nil for indirect buffers since
5517 they're never autosaved. */
5518 return (SAVE_MODIFF
< BUF_AUTOSAVE_MODIFF (current_buffer
) ? Qt
: Qnil
);
5521 /* Reading and completing file names */
5523 DEFUN ("next-read-file-uses-dialog-p", Fnext_read_file_uses_dialog_p
,
5524 Snext_read_file_uses_dialog_p
, 0, 0, 0,
5525 doc
: /* Return t if a call to `read-file-name' will use a dialog.
5526 The return value is only relevant for a call to `read-file-name' that happens
5527 before any other event (mouse or keypress) is handled. */)
5530 #if defined (USE_MOTIF) || defined (HAVE_NTGUI) || defined (USE_GTK)
5531 if ((NILP (last_nonmenu_event
) || CONSP (last_nonmenu_event
))
5541 Fread_file_name (Lisp_Object prompt
, Lisp_Object dir
, Lisp_Object default_filename
, Lisp_Object mustmatch
, Lisp_Object initial
, Lisp_Object predicate
)
5543 struct gcpro gcpro1
;
5544 Lisp_Object args
[7];
5546 GCPRO1 (default_filename
);
5547 args
[0] = intern ("read-file-name");
5550 args
[3] = default_filename
;
5551 args
[4] = mustmatch
;
5553 args
[6] = predicate
;
5554 RETURN_UNGCPRO (Ffuncall (7, args
));
5559 syms_of_fileio (void)
5561 DEFSYM (Qoperations
, "operations");
5562 DEFSYM (Qexpand_file_name
, "expand-file-name");
5563 DEFSYM (Qsubstitute_in_file_name
, "substitute-in-file-name");
5564 DEFSYM (Qdirectory_file_name
, "directory-file-name");
5565 DEFSYM (Qfile_name_directory
, "file-name-directory");
5566 DEFSYM (Qfile_name_nondirectory
, "file-name-nondirectory");
5567 DEFSYM (Qunhandled_file_name_directory
, "unhandled-file-name-directory");
5568 DEFSYM (Qfile_name_as_directory
, "file-name-as-directory");
5569 DEFSYM (Qcopy_file
, "copy-file");
5570 DEFSYM (Qmake_directory_internal
, "make-directory-internal");
5571 DEFSYM (Qmake_directory
, "make-directory");
5572 DEFSYM (Qdelete_directory_internal
, "delete-directory-internal");
5573 DEFSYM (Qdelete_file
, "delete-file");
5574 DEFSYM (Qrename_file
, "rename-file");
5575 DEFSYM (Qadd_name_to_file
, "add-name-to-file");
5576 DEFSYM (Qmake_symbolic_link
, "make-symbolic-link");
5577 DEFSYM (Qfile_exists_p
, "file-exists-p");
5578 DEFSYM (Qfile_executable_p
, "file-executable-p");
5579 DEFSYM (Qfile_readable_p
, "file-readable-p");
5580 DEFSYM (Qfile_writable_p
, "file-writable-p");
5581 DEFSYM (Qfile_symlink_p
, "file-symlink-p");
5582 DEFSYM (Qaccess_file
, "access-file");
5583 DEFSYM (Qfile_directory_p
, "file-directory-p");
5584 DEFSYM (Qfile_regular_p
, "file-regular-p");
5585 DEFSYM (Qfile_accessible_directory_p
, "file-accessible-directory-p");
5586 DEFSYM (Qfile_modes
, "file-modes");
5587 DEFSYM (Qset_file_modes
, "set-file-modes");
5588 DEFSYM (Qset_file_times
, "set-file-times");
5589 DEFSYM (Qfile_selinux_context
, "file-selinux-context");
5590 DEFSYM (Qset_file_selinux_context
, "set-file-selinux-context");
5591 DEFSYM (Qfile_newer_than_file_p
, "file-newer-than-file-p");
5592 DEFSYM (Qinsert_file_contents
, "insert-file-contents");
5593 DEFSYM (Qwrite_region
, "write-region");
5594 DEFSYM (Qverify_visited_file_modtime
, "verify-visited-file-modtime");
5595 DEFSYM (Qset_visited_file_modtime
, "set-visited-file-modtime");
5596 DEFSYM (Qauto_save_coding
, "auto-save-coding");
5598 DEFSYM (Qfile_name_history
, "file-name-history");
5599 Fset (Qfile_name_history
, Qnil
);
5601 DEFSYM (Qfile_error
, "file-error");
5602 DEFSYM (Qfile_already_exists
, "file-already-exists");
5603 DEFSYM (Qfile_date_error
, "file-date-error");
5604 DEFSYM (Qexcl
, "excl");
5606 DEFVAR_LISP ("file-name-coding-system", Vfile_name_coding_system
,
5607 doc
: /* *Coding system for encoding file names.
5608 If it is nil, `default-file-name-coding-system' (which see) is used. */);
5609 Vfile_name_coding_system
= Qnil
;
5611 DEFVAR_LISP ("default-file-name-coding-system",
5612 Vdefault_file_name_coding_system
,
5613 doc
: /* Default coding system for encoding file names.
5614 This variable is used only when `file-name-coding-system' is nil.
5616 This variable is set/changed by the command `set-language-environment'.
5617 User should not set this variable manually,
5618 instead use `file-name-coding-system' to get a constant encoding
5619 of file names regardless of the current language environment. */);
5620 Vdefault_file_name_coding_system
= Qnil
;
5622 DEFSYM (Qformat_decode
, "format-decode");
5623 DEFSYM (Qformat_annotate_function
, "format-annotate-function");
5624 DEFSYM (Qafter_insert_file_set_coding
, "after-insert-file-set-coding");
5625 DEFSYM (Qcar_less_than_car
, "car-less-than-car");
5627 Fput (Qfile_error
, Qerror_conditions
,
5628 Fpurecopy (list2 (Qfile_error
, Qerror
)));
5629 Fput (Qfile_error
, Qerror_message
,
5630 make_pure_c_string ("File error"));
5632 Fput (Qfile_already_exists
, Qerror_conditions
,
5633 Fpurecopy (list3 (Qfile_already_exists
, Qfile_error
, Qerror
)));
5634 Fput (Qfile_already_exists
, Qerror_message
,
5635 make_pure_c_string ("File already exists"));
5637 Fput (Qfile_date_error
, Qerror_conditions
,
5638 Fpurecopy (list3 (Qfile_date_error
, Qfile_error
, Qerror
)));
5639 Fput (Qfile_date_error
, Qerror_message
,
5640 make_pure_c_string ("Cannot set file date"));
5642 DEFVAR_LISP ("file-name-handler-alist", Vfile_name_handler_alist
,
5643 doc
: /* Alist of elements (REGEXP . HANDLER) for file names handled specially.
5644 If a file name matches REGEXP, all I/O on that file is done by calling
5645 HANDLER. If a file name matches more than one handler, the handler
5646 whose match starts last in the file name gets precedence. The
5647 function `find-file-name-handler' checks this list for a handler for
5650 HANDLER should be a function. The first argument given to it is the
5651 name of the I/O primitive to be handled; the remaining arguments are
5652 the arguments that were passed to that primitive. For example, if you
5653 do (file-exists-p FILENAME) and FILENAME is handled by HANDLER, then
5654 HANDLER is called like this:
5656 (funcall HANDLER 'file-exists-p FILENAME)
5658 Note that HANDLER must be able to handle all I/O primitives; if it has
5659 nothing special to do for a primitive, it should reinvoke the
5660 primitive to handle the operation \"the usual way\".
5661 See Info node `(elisp)Magic File Names' for more details. */);
5662 Vfile_name_handler_alist
= Qnil
;
5664 DEFVAR_LISP ("set-auto-coding-function",
5665 Vset_auto_coding_function
,
5666 doc
: /* If non-nil, a function to call to decide a coding system of file.
5667 Two arguments are passed to this function: the file name
5668 and the length of a file contents following the point.
5669 This function should return a coding system to decode the file contents.
5670 It should check the file name against `auto-coding-alist'.
5671 If no coding system is decided, it should check a coding system
5672 specified in the heading lines with the format:
5673 -*- ... coding: CODING-SYSTEM; ... -*-
5674 or local variable spec of the tailing lines with `coding:' tag. */);
5675 Vset_auto_coding_function
= Qnil
;
5677 DEFVAR_LISP ("after-insert-file-functions", Vafter_insert_file_functions
,
5678 doc
: /* A list of functions to be called at the end of `insert-file-contents'.
5679 Each is passed one argument, the number of characters inserted,
5680 with point at the start of the inserted text. Each function
5681 should leave point the same, and return the new character count.
5682 If `insert-file-contents' is intercepted by a handler from
5683 `file-name-handler-alist', that handler is responsible for calling the
5684 functions in `after-insert-file-functions' if appropriate. */);
5685 Vafter_insert_file_functions
= Qnil
;
5687 DEFVAR_LISP ("write-region-annotate-functions", Vwrite_region_annotate_functions
,
5688 doc
: /* A list of functions to be called at the start of `write-region'.
5689 Each is passed two arguments, START and END as for `write-region'.
5690 These are usually two numbers but not always; see the documentation
5691 for `write-region'. The function should return a list of pairs
5692 of the form (POSITION . STRING), consisting of strings to be effectively
5693 inserted at the specified positions of the file being written (1 means to
5694 insert before the first byte written). The POSITIONs must be sorted into
5697 If there are several annotation functions, the lists returned by these
5698 functions are merged destructively. As each annotation function runs,
5699 the variable `write-region-annotations-so-far' contains a list of all
5700 annotations returned by previous annotation functions.
5702 An annotation function can return with a different buffer current.
5703 Doing so removes the annotations returned by previous functions, and
5704 resets START and END to `point-min' and `point-max' of the new buffer.
5706 After `write-region' completes, Emacs calls the function stored in
5707 `write-region-post-annotation-function', once for each buffer that was
5708 current when building the annotations (i.e., at least once), with that
5709 buffer current. */);
5710 Vwrite_region_annotate_functions
= Qnil
;
5711 DEFSYM (Qwrite_region_annotate_functions
, "write-region-annotate-functions");
5713 DEFVAR_LISP ("write-region-post-annotation-function",
5714 Vwrite_region_post_annotation_function
,
5715 doc
: /* Function to call after `write-region' completes.
5716 The function is called with no arguments. If one or more of the
5717 annotation functions in `write-region-annotate-functions' changed the
5718 current buffer, the function stored in this variable is called for
5719 each of those additional buffers as well, in addition to the original
5720 buffer. The relevant buffer is current during each function call. */);
5721 Vwrite_region_post_annotation_function
= Qnil
;
5722 staticpro (&Vwrite_region_annotation_buffers
);
5724 DEFVAR_LISP ("write-region-annotations-so-far",
5725 Vwrite_region_annotations_so_far
,
5726 doc
: /* When an annotation function is called, this holds the previous annotations.
5727 These are the annotations made by other annotation functions
5728 that were already called. See also `write-region-annotate-functions'. */);
5729 Vwrite_region_annotations_so_far
= Qnil
;
5731 DEFVAR_LISP ("inhibit-file-name-handlers", Vinhibit_file_name_handlers
,
5732 doc
: /* A list of file name handlers that temporarily should not be used.
5733 This applies only to the operation `inhibit-file-name-operation'. */);
5734 Vinhibit_file_name_handlers
= Qnil
;
5736 DEFVAR_LISP ("inhibit-file-name-operation", Vinhibit_file_name_operation
,
5737 doc
: /* The operation for which `inhibit-file-name-handlers' is applicable. */);
5738 Vinhibit_file_name_operation
= Qnil
;
5740 DEFVAR_LISP ("auto-save-list-file-name", Vauto_save_list_file_name
,
5741 doc
: /* File name in which we write a list of all auto save file names.
5742 This variable is initialized automatically from `auto-save-list-file-prefix'
5743 shortly after Emacs reads your `.emacs' file, if you have not yet given it
5744 a non-nil value. */);
5745 Vauto_save_list_file_name
= Qnil
;
5747 DEFVAR_LISP ("auto-save-visited-file-name", Vauto_save_visited_file_name
,
5748 doc
: /* Non-nil says auto-save a buffer in the file it is visiting, when practical.
5749 Normally auto-save files are written under other names. */);
5750 Vauto_save_visited_file_name
= Qnil
;
5752 DEFVAR_LISP ("auto-save-include-big-deletions", Vauto_save_include_big_deletions
,
5753 doc
: /* If non-nil, auto-save even if a large part of the text is deleted.
5754 If nil, deleting a substantial portion of the text disables auto-save
5755 in the buffer; this is the default behavior, because the auto-save
5756 file is usually more useful if it contains the deleted text. */);
5757 Vauto_save_include_big_deletions
= Qnil
;
5760 DEFVAR_BOOL ("write-region-inhibit-fsync", write_region_inhibit_fsync
,
5761 doc
: /* *Non-nil means don't call fsync in `write-region'.
5762 This variable affects calls to `write-region' as well as save commands.
5763 A non-nil value may result in data loss! */);
5764 write_region_inhibit_fsync
= 0;
5767 DEFVAR_BOOL ("delete-by-moving-to-trash", delete_by_moving_to_trash
,
5768 doc
: /* Specifies whether to use the system's trash can.
5769 When non-nil, certain file deletion commands use the function
5770 `move-file-to-trash' instead of deleting files outright.
5771 This includes interactive calls to `delete-file' and
5772 `delete-directory' and the Dired deletion commands. */);
5773 delete_by_moving_to_trash
= 0;
5774 Qdelete_by_moving_to_trash
= intern_c_string ("delete-by-moving-to-trash");
5776 DEFSYM (Qmove_file_to_trash
, "move-file-to-trash");
5777 DEFSYM (Qcopy_directory
, "copy-directory");
5778 DEFSYM (Qdelete_directory
, "delete-directory");
5780 defsubr (&Sfind_file_name_handler
);
5781 defsubr (&Sfile_name_directory
);
5782 defsubr (&Sfile_name_nondirectory
);
5783 defsubr (&Sunhandled_file_name_directory
);
5784 defsubr (&Sfile_name_as_directory
);
5785 defsubr (&Sdirectory_file_name
);
5786 defsubr (&Smake_temp_name
);
5787 defsubr (&Sexpand_file_name
);
5788 defsubr (&Ssubstitute_in_file_name
);
5789 defsubr (&Scopy_file
);
5790 defsubr (&Smake_directory_internal
);
5791 defsubr (&Sdelete_directory_internal
);
5792 defsubr (&Sdelete_file
);
5793 defsubr (&Srename_file
);
5794 defsubr (&Sadd_name_to_file
);
5795 defsubr (&Smake_symbolic_link
);
5796 defsubr (&Sfile_name_absolute_p
);
5797 defsubr (&Sfile_exists_p
);
5798 defsubr (&Sfile_executable_p
);
5799 defsubr (&Sfile_readable_p
);
5800 defsubr (&Sfile_writable_p
);
5801 defsubr (&Saccess_file
);
5802 defsubr (&Sfile_symlink_p
);
5803 defsubr (&Sfile_directory_p
);
5804 defsubr (&Sfile_accessible_directory_p
);
5805 defsubr (&Sfile_regular_p
);
5806 defsubr (&Sfile_modes
);
5807 defsubr (&Sset_file_modes
);
5808 defsubr (&Sset_file_times
);
5809 defsubr (&Sfile_selinux_context
);
5810 defsubr (&Sset_file_selinux_context
);
5811 defsubr (&Sset_default_file_modes
);
5812 defsubr (&Sdefault_file_modes
);
5813 defsubr (&Sfile_newer_than_file_p
);
5814 defsubr (&Sinsert_file_contents
);
5815 defsubr (&Swrite_region
);
5816 defsubr (&Scar_less_than_car
);
5817 defsubr (&Sverify_visited_file_modtime
);
5818 defsubr (&Sclear_visited_file_modtime
);
5819 defsubr (&Svisited_file_modtime
);
5820 defsubr (&Sset_visited_file_modtime
);
5821 defsubr (&Sdo_auto_save
);
5822 defsubr (&Sset_buffer_auto_saved
);
5823 defsubr (&Sclear_buffer_auto_save_failure
);
5824 defsubr (&Srecent_auto_save_p
);
5826 defsubr (&Snext_read_file_uses_dialog_p
);
5829 defsubr (&Sunix_sync
);