}
#ifdef DOS_NT
- beg = alloca (SBYTES (filename) + 1);
- memcpy (beg, SSDATA (filename), SBYTES (filename) + 1);
+ beg = xlispstrdupa (filename);
#else
beg = SSDATA (filename);
#endif
return Ffile_name_directory (filename);
}
+/* Maximum number of bytes that DST will be longer than SRC
+ in file_name_as_directory. This occurs when SRCLEN == 0. */
+enum { file_name_as_directory_slop = 2 };
+
/* Convert from file name SRC of length SRCLEN to directory name in
DST. MULTIBYTE non-zero means the file name in SRC is a multibyte
string. On UNIX, just make sure there is a terminating /. Return
return 2;
}
- strcpy (dst, src);
-
+ memcpy (dst, src, srclen);
if (!IS_DIRECTORY_SEP (dst[srclen - 1]))
- {
- dst[srclen] = DIRECTORY_SEP;
- dst[srclen + 1] = '\0';
- srclen++;
- }
+ dst[srclen++] = DIRECTORY_SEP;
+ dst[srclen] = 0;
#ifdef DOS_NT
dostounix_filename (dst, multibyte);
#endif
{
char *buf;
ptrdiff_t length;
- Lisp_Object handler;
+ Lisp_Object handler, val;
+ USE_SAFE_ALLOCA;
CHECK_STRING (file);
if (NILP (file))
if (!NILP (Vw32_downcase_file_names))
file = Fdowncase (file);
#endif
- buf = alloca (SBYTES (file) + 10);
+ buf = SAFE_ALLOCA (SBYTES (file) + file_name_as_directory_slop + 1);
length = file_name_as_directory (buf, SSDATA (file), SBYTES (file),
STRING_MULTIBYTE (file));
- return make_specified_string (buf, -1, length, STRING_MULTIBYTE (file));
+ val = make_specified_string (buf, -1, length, STRING_MULTIBYTE (file));
+ SAFE_FREE ();
+ return val;
}
\f
/* Convert from directory name SRC of length SRCLEN to file name in
directory_file_name (char *dst, char *src, ptrdiff_t srclen, bool multibyte)
{
/* Process as Unix format: just remove any final slash.
- But leave "/" unchanged; do not change it to "". */
- strcpy (dst, src);
- if (srclen > 1
- && IS_DIRECTORY_SEP (dst[srclen - 1])
+ But leave "/" and "//" unchanged. */
+ while (srclen > 1
#ifdef DOS_NT
- && !IS_ANY_SEP (dst[srclen - 2])
+ && !IS_ANY_SEP (src[srclen - 2])
#endif
- )
- {
- dst[srclen - 1] = 0;
- srclen--;
- }
+ && IS_DIRECTORY_SEP (src[srclen - 1])
+ && ! (srclen == 2 && IS_DIRECTORY_SEP (src[0])))
+ srclen--;
+
+ memcpy (dst, src, srclen);
+ dst[srclen] = 0;
#ifdef DOS_NT
dostounix_filename (dst, multibyte);
#endif
{
char *buf;
ptrdiff_t length;
- Lisp_Object handler;
+ Lisp_Object handler, val;
+ USE_SAFE_ALLOCA;
CHECK_STRING (directory);
if (!NILP (Vw32_downcase_file_names))
directory = Fdowncase (directory);
#endif
- buf = alloca (SBYTES (directory) + 20);
+ buf = SAFE_ALLOCA (SBYTES (directory) + 1);
length = directory_file_name (buf, SSDATA (directory), SBYTES (directory),
STRING_MULTIBYTE (directory));
- return make_specified_string (buf, -1, length, STRING_MULTIBYTE (directory));
+ val = make_specified_string (buf, -1, length, STRING_MULTIBYTE (directory));
+ SAFE_FREE ();
+ return val;
}
static const char make_temp_name_tbl[64] =
Lisp_Object handler, result, handled_name;
bool multibyte;
Lisp_Object hdir;
+ USE_SAFE_ALLOCA;
CHECK_STRING (name);
#endif
/* Make a local copy of nm[] to protect it from GC in DECODE_FILE below. */
- nm = alloca (SBYTES (name) + 1);
- memcpy (nm, SSDATA (name), SBYTES (name) + 1);
+ nm = xlispstrdupa (name);
#ifdef DOS_NT
/* Note if special escape prefix is present, but remove for now. */
|| (p[2] == '.' && (IS_DIRECTORY_SEP (p[3])
|| p[3] == 0))))
lose = 1;
- /* We want to replace multiple `/' in a row with a single
- slash. */
- else if (p > nm
- && IS_DIRECTORY_SEP (p[0])
- && IS_DIRECTORY_SEP (p[1]))
+ /* Replace multiple slashes with a single one, except
+ leave leading "//" alone. */
+ else if (IS_DIRECTORY_SEP (p[0])
+ && IS_DIRECTORY_SEP (p[1])
+ && (p != nm || IS_DIRECTORY_SEP (p[2])))
lose = 1;
p++;
}
else /* ~user/filename */
{
char *o, *p;
- for (p = nm; *p && (!IS_DIRECTORY_SEP (*p)); p++);
- o = alloca (p - nm + 1);
+ for (p = nm; *p && !IS_DIRECTORY_SEP (*p); p++)
+ continue;
+ o = SAFE_ALLOCA (p - nm + 1);
memcpy (o, nm, p - nm);
- o [p - nm] = 0;
+ o[p - nm] = 0;
block_input ();
pw = getpwnam (o + 1);
if (!IS_DIRECTORY_SEP (nm[0]))
{
ptrdiff_t newlen = strlen (newdir);
- char *tmp = alloca (newlen + strlen (nm) + 2);
+ char *tmp = alloca (newlen + file_name_as_directory_slop
+ + strlen (nm) + 1);
file_name_as_directory (tmp, newdir, newlen, multibyte);
strcat (tmp, nm);
nm = tmp;
if (newdir)
{
- /* Get rid of any slash at the end of newdir, unless newdir is
- just / or // (an incomplete UNC name). */
+ /* Ignore any slash at the end of newdir, unless newdir is
+ just "/" or "//". */
length = strlen (newdir);
- tlen = length + 1;
- if (length > 1 && IS_DIRECTORY_SEP (newdir[length - 1])
-#ifdef WINDOWSNT
- && !(length == 2 && IS_DIRECTORY_SEP (newdir[0]))
-#endif
- )
- {
- char *temp = alloca (length);
- memcpy (temp, newdir, length - 1);
- temp[length - 1] = 0;
- length--;
- newdir = temp;
- }
+ while (length > 1 && IS_DIRECTORY_SEP (newdir[length - 1])
+ && ! (length == 2 && IS_DIRECTORY_SEP (newdir[0])))
+ length--;
}
else
- {
- length = 0;
- tlen = 0;
- }
+ length = 0;
/* Now concatenate the directory and name to new space in the stack frame. */
- tlen += strlen (nm) + 1;
+ tlen = length + file_name_as_directory_slop + strlen (nm) + 1;
#ifdef DOS_NT
/* Reserve space for drive specifier and escape prefix, since either
or both may need to be inserted. (The Microsoft x86 compiler
target = alloca (tlen + 4);
target += 4;
#else /* not DOS_NT */
- target = alloca (tlen);
+ target = SAFE_ALLOCA (tlen);
#endif /* not DOS_NT */
*target = 0;
if (!(drive && nm[0] && IS_DIRECTORY_SEP (newdir[0])
&& newdir[1] == '\0'))
#endif
- strcpy (target, newdir);
+ {
+ memcpy (target, newdir, length);
+ target[length] = 0;
+ }
}
else
file_name_as_directory (target, newdir, length, multibyte);
++o;
p += 3;
}
- else if (p > target && IS_DIRECTORY_SEP (p[1]))
- /* Collapse multiple `/' in a row. */
+ else if (IS_DIRECTORY_SEP (p[1])
+ && (p != target || IS_DIRECTORY_SEP (p[2])))
+ /* Collapse multiple "/", except leave leading "//" alone. */
p++;
else
{
{
handled_name = call3 (handler, Qexpand_file_name,
result, default_directory);
- if (STRINGP (handled_name))
- return handled_name;
- error ("Invalid handler in `file-name-handler-alist'");
+ if (! STRINGP (handled_name))
+ error ("Invalid handler in `file-name-handler-alist'");
+ result = handled_name;
}
+ SAFE_FREE ();
return result;
}
/* Always work on a copy of the string, in case GC happens during
decode of environment variables, causing the original Lisp_String
data to be relocated. */
- nm = alloca (SBYTES (filename) + 1);
- memcpy (nm, SDATA (filename), SBYTES (filename) + 1);
+ nm = xlispstrdupa (filename);
#ifdef DOS_NT
dostounix_filename (nm, multibyte);
if (same_at_start - BEGV_BYTE == end_offset - beg_offset)
{
emacs_close (fd);
- specpdl_ptr--;
+ clear_unwind_protect (fd_index);
+
/* Truncate the buffer to the size of the file. */
del_range_1 (same_at_start, same_at_end, 0, 0);
goto handled;
This calls `write-region-annotate-functions' at the start, and
`write-region-post-annotation-function' at the end. */)
- (Lisp_Object start, Lisp_Object end, Lisp_Object filename, Lisp_Object append, Lisp_Object visit, Lisp_Object lockname, Lisp_Object mustbenew)
+ (Lisp_Object start, Lisp_Object end, Lisp_Object filename, Lisp_Object append,
+ Lisp_Object visit, Lisp_Object lockname, Lisp_Object mustbenew)
+{
+ return write_region (start, end, filename, append, visit, lockname, mustbenew,
+ -1);
+}
+
+/* Like Fwrite_region, except that if DESC is nonnegative, it is a file
+ descriptor for FILENAME, so do not open or close FILENAME. */
+
+Lisp_Object
+write_region (Lisp_Object start, Lisp_Object end, Lisp_Object filename,
+ Lisp_Object append, Lisp_Object visit, Lisp_Object lockname,
+ Lisp_Object mustbenew, int desc)
{
- int desc;
int open_flags;
int mode;
off_t offset IF_LINT (= 0);
+ bool open_and_close_file = desc < 0;
bool ok;
int save_errno = 0;
const char *fn;
struct stat st;
EMACS_TIME modtime;
ptrdiff_t count = SPECPDL_INDEX ();
- ptrdiff_t count1;
+ ptrdiff_t count1 IF_LINT (= 0);
Lisp_Object handler;
Lisp_Object visit_file;
Lisp_Object annotations;
Lisp_Object encoded_filename;
bool visiting = (EQ (visit, Qt) || STRINGP (visit));
bool quietly = !NILP (visit);
+ bool file_locked = 0;
struct gcpro gcpro1, gcpro2, gcpro3, gcpro4, gcpro5;
struct buffer *given_buffer;
struct coding_system coding;
record_unwind_protect (build_annotations_unwind,
Vwrite_region_annotation_buffers);
Vwrite_region_annotation_buffers = list1 (Fcurrent_buffer ());
- count1 = SPECPDL_INDEX ();
given_buffer = current_buffer;
coding.mode |= CODING_MODE_SELECTIVE_DISPLAY;
#ifdef CLASH_DETECTION
- if (!auto_saving)
- lock_file (lockname);
+ if (open_and_close_file && !auto_saving)
+ {
+ lock_file (lockname);
+ file_locked = 1;
+ }
#endif /* CLASH_DETECTION */
encoded_filename = ENCODE_FILE (filename);
mode = auto_saving ? auto_save_mode_bits : 0666;
#endif
- desc = emacs_open (fn, open_flags, mode);
-
- if (desc < 0)
+ if (open_and_close_file)
{
- int open_errno = errno;
+ desc = emacs_open (fn, open_flags, mode);
+ if (desc < 0)
+ {
+ int open_errno = errno;
#ifdef CLASH_DETECTION
- if (!auto_saving) unlock_file (lockname);
+ if (file_locked)
+ unlock_file (lockname);
#endif /* CLASH_DETECTION */
- UNGCPRO;
- report_file_errno ("Opening output file", filename, open_errno);
- }
+ UNGCPRO;
+ report_file_errno ("Opening output file", filename, open_errno);
+ }
- record_unwind_protect_int (close_file_unwind, desc);
+ count1 = SPECPDL_INDEX ();
+ record_unwind_protect_int (close_file_unwind, desc);
+ }
if (NUMBERP (append))
{
{
int lseek_errno = errno;
#ifdef CLASH_DETECTION
- if (!auto_saving) unlock_file (lockname);
+ if (file_locked)
+ unlock_file (lockname);
#endif /* CLASH_DETECTION */
UNGCPRO;
report_file_errno ("Lseek error", filename, lseek_errno);
immediate_quit = 0;
- /* fsync is not crucial for auto-save files, since they might lose
- some work anyway. */
- if (!auto_saving && !write_region_inhibit_fsync)
+ /* fsync is not crucial for temporary files. Nor for auto-save
+ files, since they might lose some work anyway. */
+ if (open_and_close_file && !auto_saving && !write_region_inhibit_fsync)
{
/* Transfer data and metadata to disk, retrying if interrupted.
fsync can report a write failure here, e.g., due to disk full
ok = 0, save_errno = errno;
}
- /* NFS can report a write failure now. */
- if (emacs_close (desc) < 0)
- ok = 0, save_errno = errno;
+ if (open_and_close_file)
+ {
+ /* NFS can report a write failure now. */
+ if (emacs_close (desc) < 0)
+ ok = 0, save_errno = errno;
- /* Discard the unwind protect for close_file_unwind. */
- specpdl_ptr = specpdl + count1;
+ /* Discard the unwind protect for close_file_unwind. */
+ specpdl_ptr = specpdl + count1;
+ }
/* Some file systems have a bug where st_mtime is not updated
properly after a write. For example, CIFS might not see the
unbind_to (count, Qnil);
#ifdef CLASH_DETECTION
- if (!auto_saving)
+ if (file_locked)
unlock_file (lockname);
#endif /* CLASH_DETECTION */
return Qnil;
}
\f
-Lisp_Object merge (Lisp_Object, Lisp_Object, Lisp_Object);
-
DEFUN ("car-less-than-car", Fcar_less_than_car, Scar_less_than_car, 2, 2, 0,
doc: /* Return t if (car A) is numerically less than (car B). */)
(Lisp_Object a, Lisp_Object b)
couldn't handle some ange-ftp'd file. */
for (do_handled_files = 0; do_handled_files < 2; do_handled_files++)
- for (tail = Vbuffer_alist; CONSP (tail); tail = XCDR (tail))
+ FOR_EACH_LIVE_BUFFER (tail, buf)
{
- buf = XCDR (XCAR (tail));
b = XBUFFER (buf);
/* Record all the buffers that have auto save mode