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- /* File IO for GNU Emacs.
- Copyright (C) 1985, 1986, 1987, 1988, 1990 Free Software Foundation, Inc.
-
- This file is part of GNU Emacs.
-
- GNU Emacs is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 1, or (at your option)
- any later version.
-
- GNU Emacs is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with GNU Emacs; see the file COPYING. If not, write to
- the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
-
- #include "config.h"
-
- #include <sys/types.h>
- #ifdef hpux
- /* needed by <pwd.h> */
- #include <stdio.h>
- #undef NULL
- #endif
- #include <sys/stat.h>
-
- #ifdef VMS
- #include "vms-pwd.h"
- #else
- #include <pwd.h>
- #endif
-
- #include <ctype.h>
-
- #ifdef VMS
- #include "dir.h"
- #include <perror.h>
- #include <stddef.h>
- #include <string.h>
- #endif
- #include <errno.h>
-
- #ifndef vax11c
- extern int errno;
- extern char *sys_errlist[];
- extern int sys_nerr;
- #endif
-
- #define err_str(a) ((a) < sys_nerr ? sys_errlist[a] : "unknown error")
-
- #ifdef APOLLO
- #include <sys/time.h>
- #endif
-
- #ifdef VMS
- #include <file.h>
- #include <rmsdef.h>
- #include <fab.h>
- #include <nam.h>
- extern unsigned char vms_file_written[]; /* set in rename_sans_version */
- #endif
-
- #ifdef HAVE_TIMEVAL
- #ifdef HPUX
- #include <time.h>
- #else
- #include <sys/time.h>
- #endif
- #endif
-
- #ifdef HPUX_NET
- #include <netio.h>
- #ifndef HPUX8
- #include <errnet.h>
- #endif
- #endif
-
- #ifdef NULL
- #undef NULL
- #endif
- #include "lisp.h"
- #include "buffer.h"
- #include "window.h"
-
- #include "filetypes.h"
-
- #ifndef O_WRONLY
- #define O_WRONLY 1
- #endif
-
- #define min(a, b) ((a) < (b) ? (a) : (b))
- #define max(a, b) ((a) > (b) ? (a) : (b))
-
- /* Nonzero during writing of auto-save files */
- int auto_saving;
-
- /* Nonzero means, when reading a filename in the minibuffer,
- start out by inserting the default directory into the minibuffer. */
- int insert_default_directory;
-
- /* On VMS, nonzero means write new files with record format stmlf.
- Zero means use var format. */
- int vms_stmlf_recfm;
-
- Lisp_Object Qfile_error, Qfile_already_exists;
-
- report_file_error (string, data)
- char *string;
- Lisp_Object data;
- {
- Lisp_Object errstring;
-
- if (errno >= 0 && errno < sys_nerr)
- errstring = build_string (sys_errlist[errno]);
- else
- errstring = build_string ("undocumented error code");
-
- /* System error messages are capitalized. Downcase the initial
- unless it is followed by a slash. */
- if (XSTRING (errstring)->data[1] != '/')
- XSTRING (errstring)->data[0] = DOWNCASE (XSTRING (errstring)->data[0]);
-
- while (1)
- Fsignal (Qfile_error,
- Fcons (build_string (string), Fcons (errstring, data)));
- }
-
- DEFUN ("file-name-directory", Ffile_name_directory, Sfile_name_directory,
- 1, 1, 0,
- "Return the directory component in file name NAME.\n\
- Return nil if NAME does not include a directory.\n\
- Otherwise returns a directory spec.\n\
- Given a Unix syntax file name, returns a string ending in slash;\n\
- on VMS, perhaps instead a string ending in :, ] or >.")
- (file)
- Lisp_Object file;
- {
- register unsigned char *beg;
- register unsigned char *p;
-
- CHECK_STRING (file, 0);
-
- beg = XSTRING (file)->data;
- p = beg + XSTRING (file)->size;
-
- while (p != beg && p[-1] != '/'
- #ifdef VMS
- && p[-1] != ':' && p[-1] != ']' && p[-1] != '>'
- #endif /* VMS */
- ) p--;
-
- if (p == beg)
- return Qnil;
- return make_string (beg, p - beg);
- }
-
- DEFUN ("file-name-nondirectory", Ffile_name_nondirectory, Sfile_name_nondirectory,
- 1, 1, 0,
- "Return file name NAME sans its directory.\n\
- For example, in a Unix-syntax file name,\n\
- this is everything after the last slash,\n\
- or the entire name if it contains no slash.")
- (file)
- Lisp_Object file;
- {
- register unsigned char *beg, *p, *end;
-
- CHECK_STRING (file, 0);
-
- beg = XSTRING (file)->data;
- end = p = beg + XSTRING (file)->size;
-
- while (p != beg && p[-1] != '/'
- #ifdef VMS
- && p[-1] != ':' && p[-1] != ']' && p[-1] != '>'
- #endif /* VMS */
- ) p--;
-
- return make_string (p, end - p);
- }
-
- char *
- file_name_as_directory (out, in)
- char *out, *in;
- {
- int size = strlen (in) - 1;
-
- strcpy (out, in);
-
- #ifdef VMS
- /* Is it already a directory string? */
- if (in[size] == ':' || in[size] == ']' || in[size] == '>')
- return out;
- /* Is it a VMS directory file name? If so, hack VMS syntax. */
- else if (! index (in, '/')
- && ((size > 3 && ! strcmp (&in[size - 3], ".DIR"))
- || (size > 3 && ! strcmp (&in[size - 3], ".dir"))
- || (size > 5 && (! strncmp (&in[size - 5], ".DIR", 4)
- || ! strncmp (&in[size - 5], ".dir", 4))
- && (in[size - 1] == '.' || in[size - 1] == ';')
- && in[size] == '1')))
- {
- register char *p, *dot;
- char brack;
-
- /* x.dir -> [.x]
- dir:x.dir --> dir:[x]
- dir:[x]y.dir --> dir:[x.y] */
- p = in + size;
- while (p != in && *p != ':' && *p != '>' && *p != ']') p--;
- if (p != in)
- {
- strncpy (out, in, p - in);
- out[p - in] = '\0';
- if (*p == ':')
- {
- brack = ']';
- strcat (out, ":[");
- }
- else
- {
- brack = *p;
- strcat (out, ".");
- }
- p++;
- }
- else
- {
- brack = ']';
- strcpy (out, "[.");
- }
- dot = (char *) index (p, '.');
- if (dot)
- {
- /* blindly remove any extension */
- size = strlen (out) + (dot - p);
- strncat (out, p, dot - p);
- }
- else
- {
- strcat (out, p);
- size = strlen (out);
- }
- out[size++] = brack;
- out[size] = '\0';
- }
- #else /* not VMS */
- /* For Unix syntax, Append a slash if necessary */
- if (out[size] != '/')
- strcat (out, "/");
- #endif /* not VMS */
- return out;
- }
-
- DEFUN ("file-name-as-directory", Ffile_name_as_directory,
- Sfile_name_as_directory, 1, 1, 0,
- "Return a string representing file FILENAME interpreted as a directory.\n\
- This string can be used as the value of default-directory\n\
- or passed as second argument to expand-file-name.\n\
- For a Unix-syntax file name, just appends a slash.\n\
- On VMS, converts \"[X]FOO.DIR\" to \"[X.FOO]\", etc.")
- (file)
- Lisp_Object file;
- {
- char *buf;
-
- CHECK_STRING (file, 0);
- if (NULL (file))
- return Qnil;
- buf = (char *) alloca (XSTRING (file)->size + 10);
- return build_string (file_name_as_directory (buf, XSTRING (file)->data));
- }
-
- /*
- * Convert from directory name to filename.
- * On VMS:
- * xyzzy:[mukesh.emacs] => xyzzy:[mukesh]emacs.dir.1
- * xyzzy:[mukesh] => xyzzy:[000000]mukesh.dir.1
- * On UNIX, it's simple: just make sure there is a terminating /
-
- * Value is nonzero if the string output is different from the input.
- */
-
- directory_file_name (src, dst)
- char *src, *dst;
- {
- long slen;
- #ifdef VMS
- long rlen;
- char * ptr, * rptr;
- char bracket;
- struct FAB fab = cc$rms_fab;
- struct NAM nam = cc$rms_nam;
- char esa[NAM$C_MAXRSS];
- #endif /* VMS */
-
- slen = strlen (src) - 1;
- #ifdef VMS
- if (! index (src, '/')
- && (src[slen] == ']' || src[slen] == ':' || src[slen] == '>'))
- {
- /* VMS style - convert [x.y.z] to [x.y]z, [x] to [000000]x */
- fab.fab$l_fna = src;
- fab.fab$b_fns = slen + 1;
- fab.fab$l_nam = &nam;
- fab.fab$l_fop = FAB$M_NAM;
-
- nam.nam$l_esa = esa;
- nam.nam$b_ess = sizeof esa;
- nam.nam$b_nop |= NAM$M_SYNCHK;
-
- /* We call SYS$PARSE to handle such things as [--] for us. */
- if (SYS$PARSE(&fab, 0, 0) == RMS$_NORMAL)
- {
- slen = nam.nam$b_esl - 1;
- if (esa[slen] == ';' && esa[slen - 1] == '.')
- slen -= 2;
- esa[slen + 1] = '\0';
- src = esa;
- }
- if (src[slen] != ']' && src[slen] != '>')
- {
- /* what about when we have logical_name:???? */
- if (src[slen] == ':')
- { /* Xlate logical name and see what we get */
- ptr = strcpy (dst, src); /* upper case for getenv */
- while (*ptr)
- {
- if ('a' <= *ptr && *ptr <= 'z')
- *ptr -= 040;
- ptr++;
- }
- dst[slen] = 0; /* remove colon */
- if (!(src = egetenv (dst)))
- return 0;
- /* should we jump to the beginning of this procedure?
- Good points: allows us to use logical names that xlate
- to Unix names,
- Bad points: can be a problem if we just translated to a device
- name...
- For now, I'll punt and always expect VMS names, and hope for
- the best! */
- slen = strlen (src) - 1;
- if (src[slen] != ']' && src[slen] != '>')
- { /* no recursion here! */
- strcpy (dst, src);
- return 0;
- }
- }
- else
- { /* not a directory spec */
- strcpy (dst, src);
- return 0;
- }
- }
- bracket = src[slen];
- ptr = (char *) index (src, bracket - 2);
- if (ptr == 0)
- { /* no opening bracket */
- strcpy (dst, src);
- return 0;
- }
- if (!(rptr = (char *) rindex (src, '.')))
- rptr = ptr;
- slen = rptr - src;
- strncpy (dst, src, slen);
- dst[slen] = '\0';
- if (*rptr == '.')
- {
- dst[slen++] = bracket;
- dst[slen] = '\0';
- }
- else
- {
- /* If we have the top-level of a rooted directory (i.e. xx:[000000]),
- then translate the device and recurse. */
- if (dst[slen - 1] == ':'
- && dst[slen - 2] != ':' /* skip decnet nodes */
- && strcmp(src + slen, "[000000]") == 0)
- {
- dst[slen - 1] = '\0';
- if ((ptr = egetenv (dst))
- && (rlen = strlen (ptr) - 1) > 0
- && (ptr[rlen] == ']' || ptr[rlen] == '>')
- && ptr[rlen - 1] == '.')
- {
- char * buf = (char *) alloca (strlen (ptr) + 1);
- strcpy (buf, ptr);
- buf[rlen - 1] = ']';
- buf[rlen] = '\0';
- return directory_file_name (buf, dst);
- }
- else
- dst[slen - 1] = ':';
- }
- strcat (dst, "[000000]");
- slen += 8;
- }
- rptr++;
- rlen = strlen (rptr) - 1;
- strncat (dst, rptr, rlen);
- dst[slen + rlen] = '\0';
- strcat (dst, ".DIR.1");
- return 1;
- }
- #endif /* VMS */
- /* Process as Unix format: just remove any final slash.
- But leave "/" unchanged; do not change it to "". */
- strcpy (dst, src);
- if (slen > 0 && dst[slen] == '/')
- dst[slen] = 0;
- return 1;
- }
-
- DEFUN ("directory-file-name", Fdirectory_file_name, Sdirectory_file_name,
- 1, 1, 0,
- "Returns the file name of the directory named DIR.\n\
- This is the name of the file that holds the data for the directory DIR.\n\
- In Unix-syntax, this just removes the final slash.\n\
- On VMS, given a VMS-syntax directory name such as \"[X.Y]\",\n\
- returns a file name such as \"[X]Y.DIR.1\".")
- (directory)
- Lisp_Object directory;
- {
- char *buf;
-
- CHECK_STRING (directory, 0);
-
- if (NULL (directory))
- return Qnil;
- #ifdef VMS
- /* 20 extra chars is insufficient for VMS, since we might perform a
- logical name translation. an equivalence string can be up to 255
- chars long, so grab that much extra space... - sss */
- buf = (char *) alloca (XSTRING (directory)->size + 20 + 255);
- #else
- buf = (char *) alloca (XSTRING (directory)->size + 20);
- #endif
- directory_file_name (XSTRING (directory)->data, buf);
- return build_string (buf);
- }
-
- DEFUN ("make-temp-name", Fmake_temp_name, Smake_temp_name, 1, 1, 0,
- "Generate temporary name (string) starting with PREFIX (a string).")
- (prefix)
- Lisp_Object prefix;
- {
- Lisp_Object val;
- val = concat2 (prefix, build_string ("XXXXXX"));
- mktemp (XSTRING (val)->data);
- return val;
- }
-
- DEFUN ("expand-file-name", Fexpand_file_name, Sexpand_file_name, 1, 2, 0,
- "Convert FILENAME to absolute, and canonicalize it.\n\
- Second arg DEFAULT is directory to start with if FILENAME is relative\n\
- (does not start with slash); if DEFAULT is nil or missing,\n\
- the current buffer's value of default-directory is used.\n\
- Filenames containing . or .. as components are simplified;\n\
- initial ~ is expanded. See also the function substitute-in-file-name.")
- (name, defalt)
- Lisp_Object name, defalt;
- {
- unsigned char *nm;
-
- register unsigned char *newdir, *p, *o;
- int tlen;
- unsigned char *target;
- struct passwd *pw;
- int lose;
- #ifdef VMS
- unsigned char * colon = 0;
- unsigned char * close = 0;
- unsigned char * slash = 0;
- unsigned char * brack = 0;
- int lbrack = 0, rbrack = 0;
- int dots = 0;
- #endif /* VMS */
-
- CHECK_STRING (name, 0);
-
- #ifdef VMS
- /* Filenames on VMS are always upper case. */
- name = Fupcase (name);
- #endif
-
- nm = XSTRING (name)->data;
-
- /* If nm is absolute, flush ...// and detect /./ and /../.
- If no /./ or /../ we can return right away. */
- if (
- nm[0] == '/'
- #ifdef VMS
- || index (nm, ':')
- #endif /* VMS */
- )
- {
- p = nm;
- lose = 0;
- while (*p)
- {
- if (p[0] == '/' && p[1] == '/'
- #ifdef APOLLO
- /* // at start of filename is meaningful on Apollo system */
- && nm != p
- #endif /* APOLLO */
- )
- nm = p + 1;
- if (p[0] == '/' && p[1] == '~')
- nm = p + 1, lose = 1;
- if (p[0] == '/' && p[1] == '.'
- && (p[2] == '/' || p[2] == 0
- || (p[2] == '.' && (p[3] == '/' || p[3] == 0))))
- lose = 1;
- #ifdef VMS
- if (p[0] == '\\')
- lose = 1;
- if (p[0] == '/') {
- /* if dev:[dir]/, move nm to / */
- if (!slash && p > nm && (brack || colon)) {
- nm = (brack ? brack + 1 : colon + 1);
- lbrack = rbrack = 0;
- brack = 0;
- colon = 0;
- }
- slash = p;
- }
- if (p[0] == '-')
- #ifndef VMS4_4
- /* VMS pre V4.4,convert '-'s in filenames. */
- if (lbrack == rbrack)
- {
- if (dots < 2) /* this is to allow negative version numbers */
- p[0] = '_';
- }
- else
- #endif /* VMS4_4 */
- if (lbrack > rbrack &&
- ((p[-1] == '.' || p[-1] == '[' || p[-1] == '<') &&
- (p[1] == '.' || p[1] == ']' || p[1] == '>')))
- lose = 1;
- #ifndef VMS4_4
- else
- p[0] = '_';
- #endif /* VMS4_4 */
- /* count open brackets, reset close bracket pointer */
- if (p[0] == '[' || p[0] == '<')
- lbrack++, brack = 0;
- /* count close brackets, set close bracket pointer */
- if (p[0] == ']' || p[0] == '>')
- rbrack++, brack = p;
- /* detect ][ or >< */
- if ((p[0] == ']' || p[0] == '>') && (p[1] == '[' || p[1] == '<'))
- lose = 1;
- if ((p[0] == ':' || p[0] == ']' || p[0] == '>') && p[1] == '~')
- nm = p + 1, lose = 1;
- if (p[0] == ':' && (colon || slash))
- /* if dev1:[dir]dev2:, move nm to dev2: */
- if (brack)
- {
- nm = brack + 1;
- brack = 0;
- }
- /* if /pathname/dev:, move nm to dev: */
- else if (slash)
- nm = slash + 1;
- /* if node::dev:, move colon following dev */
- else if (colon && colon[-1] == ':')
- colon = p;
- /* if dev1:dev2:, move nm to dev2: */
- else if (colon && colon[-1] != ':')
- {
- nm = colon + 1;
- colon = 0;
- }
- if (p[0] == ':' && !colon)
- {
- if (p[1] == ':')
- p++;
- colon = p;
- }
- if (lbrack == rbrack)
- if (p[0] == ';')
- dots = 2;
- else if (p[0] == '.')
- dots++;
- #endif /* VMS */
- p++;
- }
- if (!lose)
- {
- #ifdef VMS
- if (index (nm, '/'))
- return build_string (sys_translate_unix (nm));
- #endif /* VMS */
- if (nm == XSTRING (name)->data)
- return name;
- return build_string (nm);
- }
- }
-
- /* Now determine directory to start with and put it in NEWDIR. */
-
- newdir = 0;
-
- if (nm[0] == '~')
- {
- if (nm[1] == '/'
- #ifdef VMS
- || nm[1] == ':'
- #endif /* VMS */
- || nm[1] == 0)
- {
- /* Handle ~ on its own. */
- newdir = (unsigned char *) egetenv ("HOME");
- }
- else
- {
- /* Handle ~ followed by user name. */
- unsigned char *user = nm + 1;
- /* Find end of name. */
- unsigned char *ptr = (unsigned char *) index (user, '/');
- int len = ptr ? ptr - user : strlen (user);
- #ifdef VMS
- unsigned char *ptr1 = (unsigned char *) index (user, ':');
- if (ptr1 != 0 && ptr1 - user < len)
- len = ptr1 - user;
- #endif /* VMS */
- /* Copy the user name into temp storage. */
- o = (unsigned char *) alloca (len + 1);
- bcopy ((char *) user, o, len);
- o[len] = 0;
-
- /* Look up the user name. */
- pw = (struct passwd *) getpwnam (o);
- if (!pw)
- error ("User \"%s\" is not known", o);
- newdir = (unsigned char *) pw->pw_dir;
-
- /* Discard the user name from NM. */
- nm += len;
- }
-
- /* Discard the ~ from NM. */
- nm++;
- #ifdef VMS
- if (*nm != 0)
- nm++; /* Don't leave the slash in nm. */
- #endif /* VMS */
-
- if (newdir == 0)
- newdir = (unsigned char *) "";
- }
-
- if (nm[0] != '/'
- #ifdef VMS
- && !index (nm, ':')
- #endif /* not VMS */
- && !newdir)
- {
- if (NULL (defalt))
- defalt = current_buffer->directory;
- CHECK_STRING (defalt, 1);
- newdir = XSTRING (defalt)->data;
- }
-
- if (newdir != 0)
- {
- /* Get rid of any slash at the end of newdir. */
- int length = strlen (newdir);
- if (length > 1 && newdir[length - 1] == '/')
- {
- unsigned char *temp = (unsigned char *) alloca (length);
- bcopy (newdir, temp, length - 1);
- temp[length - 1] = 0;
- newdir = temp;
- }
- tlen = length + 1;
- }
- else
- tlen = 0;
-
- /* Now concatenate the directory and name to new space in the stack frame */
-
- tlen += strlen (nm) + 1;
- target = (unsigned char *) alloca (tlen);
- *target = 0;
-
- if (newdir)
- {
- #ifndef VMS
- if (nm[0] == 0 || nm[0] == '/')
- strcpy (target, newdir);
- else
- #endif
- file_name_as_directory (target, newdir);
- }
-
- strcat (target, nm);
- #ifdef VMS
- if (index (target, '/'))
- strcpy (target, sys_translate_unix (target));
- #endif /* VMS */
-
- /* Now canonicalize by removing /. and /foo/.. if they appear */
-
- p = target;
- o = target;
-
- while (*p)
- {
- #ifdef VMS
- if (*p != ']' && *p != '>' && *p != '-')
- {
- if (*p == '\\')
- p++;
- *o++ = *p++;
- }
- else if ((p[0] == ']' || p[0] == '>') && p[0] == p[1] + 2)
- /* brackets are offset from each other by 2 */
- {
- p += 2;
- if (*p != '.' && *p != '-' && o[-1] != '.')
- /* convert [foo][bar] to [bar] */
- while (o[-1] != '[' && o[-1] != '<')
- o--;
- else if (*p == '-' && *o != '.')
- *--p = '.';
- }
- else if (p[0] == '-' && o[-1] == '.' &&
- (p[1] == '.' || p[1] == ']' || p[1] == '>'))
- /* flush .foo.- ; leave - if stopped by '[' or '<' */
- {
- do
- o--;
- while (o[-1] != '.' && o[-1] != '[' && o[-1] != '<');
- if (p[1] == '.') /* foo.-.bar ==> bar*/
- p += 2;
- else if (o[-1] == '.') /* '.foo.-]' ==> ']' */
- p++, o--;
- /* else [foo.-] ==> [-] */
- }
- else
- {
- #ifndef VMS4_4
- if (*p == '-' &&
- o[-1] != '[' && o[-1] != '<' && o[-1] != '.' &&
- p[1] != ']' && p[1] != '>' && p[1] != '.')
- *p = '_';
- #endif /* VMS4_4 */
- *o++ = *p++;
- }
- #else /* not VMS */
- if (*p != '/')
- {
- *o++ = *p++;
- }
- else if (!strncmp (p, "//", 2)
- #ifdef APOLLO
- /* // at start of filename is meaningful in Apollo system */
- && o != target
- #endif /* APOLLO */
- )
- {
- o = target;
- p++;
- }
- else if (p[0] == '/' && p[1] == '.' &&
- (p[2] == '/' || p[2] == 0))
- p += 2;
- else if (!strncmp (p, "/..", 3)
- /* `/../' is the "superroot" on certain file systems. */
- && o != target
- && (p[3] == '/' || p[3] == 0))
- {
- while (o != target && *--o != '/')
- ;
- #ifdef APOLLO
- if (o == target + 1 && o[-1] == '/' && o[0] == '/')
- ++o;
- else
- #endif APOLLO
- if (o == target && *o == '/')
- ++o;
- p += 3;
- }
- else
- {
- *o++ = *p++;
- }
- #endif /* not VMS */
- }
-
- return make_string (target, o - target);
- }
-
- DEFUN ("substitute-in-file-name", Fsubstitute_in_file_name,
- Ssubstitute_in_file_name, 1, 1, 0,
- "Substitute environment variables referred to in STRING.\n\
- A $ begins a request to substitute; the env variable name is the alphanumeric\n\
- characters and underscores after the $, or is surrounded by braces.\n\
- If a ~ appears following a /, everything through that / is discarded.\n\
- On VMS, $ substitution is not done; this function does little and only\n\
- duplicates what expand-file-name does.")
- (string)
- Lisp_Object string;
- {
- unsigned char *nm;
-
- register unsigned char *s, *p, *o, *x, *endp;
- unsigned char *target;
- int total = 0;
- int substituted = 0;
- unsigned char *xnm;
-
- CHECK_STRING (string, 0);
-
- nm = XSTRING (string)->data;
- endp = nm + XSTRING (string)->size;
-
- /* If /~ or // appears, discard everything through first slash. */
-
- for (p = nm; p != endp; p++)
- {
- if ((p[0] == '~' ||
- #ifdef APOLLO
- /* // at start of file name is meaningful in Apollo system */
- (p[0] == '/' && p - 1 != nm)
- #else /* not APOLLO */
- p[0] == '/'
- #endif /* not APOLLO */
- )
- && p != nm &&
- #ifdef VMS
- (p[-1] == ':' || p[-1] == ']' || p[-1] == '>' ||
- #endif /* VMS */
- p[-1] == '/')
- #ifdef VMS
- )
- #endif /* VMS */
- {
- nm = p;
- substituted = 1;
- }
- }
-
- #ifdef VMS
- return build_string (nm);
- #else
-
- /* See if any variables are substituted into the string
- and find the total length of their values in `total' */
-
- for (p = nm; p != endp;)
- if (*p != '$')
- p++;
- else
- {
- p++;
- if (p == endp)
- goto badsubst;
- else if (*p == '$')
- {
- /* "$$" means a single "$" */
- p++;
- total -= 1;
- substituted = 1;
- continue;
- }
- else if (*p == '{')
- {
- o = ++p;
- while (p != endp && *p != '}') p++;
- if (*p != '}') goto missingclose;
- s = p;
- }
- else
- {
- o = p;
- while (p != endp && (isalnum (*p) || *p == '_')) p++;
- s = p;
- }
-
- /* Copy out the variable name */
- target = (unsigned char *) alloca (s - o + 1);
- strncpy (target, o, s - o);
- target[s - o] = 0;
-
- /* Get variable value */
- o = (unsigned char *) egetenv (target);
- /* The presence of this code makes vax 5.0 crash, for reasons yet unknown */
- #if 0
- #ifdef USG
- if (!o && !strcmp (target, "USER"))
- o = egetenv ("LOGNAME");
- #endif /* USG */
- #endif /* 0 */
- if (!o) goto badvar;
- total += strlen (o);
- substituted = 1;
- }
-
- if (!substituted)
- return string;
-
- /* If substitution required, recopy the string and do it */
- /* Make space in stack frame for the new copy */
- xnm = (unsigned char *) alloca (XSTRING (string)->size + total + 1);
- x = xnm;
-
- /* Copy the rest of the name through, replacing $ constructs with values */
- for (p = nm; *p;)
- if (*p != '$')
- *x++ = *p++;
- else
- {
- p++;
- if (p == endp)
- goto badsubst;
- else if (*p == '$')
- {
- *x++ = *p++;
- continue;
- }
- else if (*p == '{')
- {
- o = ++p;
- while (p != endp && *p != '}') p++;
- if (*p != '}') goto missingclose;
- s = p++;
- }
- else
- {
- o = p;
- while (p != endp && (isalnum (*p) || *p == '_')) p++;
- s = p;
- }
-
- /* Copy out the variable name */
- target = (unsigned char *) alloca (s - o + 1);
- strncpy (target, o, s - o);
- target[s - o] = 0;
-
- /* Get variable value */
- o = (unsigned char *) egetenv (target);
- /* The presence of this code makes vax 5.0 crash, for reasons yet unknown */
- #if 0
- #ifdef USG
- if (!o && !strcmp (target, "USER"))
- o = egetenv ("LOGNAME");
- #endif /* USG */
- #endif /* 0 */
- if (!o)
- goto badvar;
-
- strcpy (x, o);
- x += strlen (o);
- }
-
- *x = 0;
-
- /* If /~ or // appears, discard everything through first slash. */
-
- for (p = xnm; p != x; p++)
- if ((p[0] == '~' ||
- #ifdef APOLLO
- /* // at start of file name is meaningful in Apollo system */
- (p[0] == '/' && p - 1 != xnm)
- #else /* not APOLLO */
- p[0] == '/'
- #endif /* not APOLLO */
- )
- && p != nm && p[-1] == '/')
- xnm = p;
-
- return make_string (xnm, x - xnm);
-
- badsubst:
- error ("Bad format environment-variable substitution");
- missingclose:
- error ("Missing \"}\" in environment-variable substitution");
- badvar:
- error ("Substituting nonexistent environment variable \"%s\"", target);
-
- /* NOTREACHED */
- #endif /* not VMS */
- }
-
- Lisp_Object
- expand_and_dir_to_file (filename, defdir)
- Lisp_Object filename, defdir;
- {
- register Lisp_Object abspath;
-
- abspath = Fexpand_file_name (filename, defdir);
- #ifdef VMS
- {
- register int c = XSTRING (abspath)->data[XSTRING (abspath)->size - 1];
- if (c == ':' || c == ']' || c == '>')
- abspath = Fdirectory_file_name (abspath);
- }
- #else
- /* Remove final slash, if any (unless path is root).
- stat behaves differently depending! */
- if (XSTRING (abspath)->size > 1
- && XSTRING (abspath)->data[XSTRING (abspath)->size - 1] == '/')
- {
- if (EQ (abspath, filename))
- abspath = Fcopy_sequence (abspath);
- XSTRING (abspath)->data[XSTRING (abspath)->size - 1] = 0;
- }
- #endif
- return abspath;
- }
-
- barf_or_query_if_file_exists (absname, querystring, interactive)
- Lisp_Object absname;
- unsigned char *querystring;
- int interactive;
- {
- register Lisp_Object tem;
- struct gcpro gcpro1;
-
- if (access (XSTRING (absname)->data, 4) >= 0)
- {
- if (! interactive)
- Fsignal (Qfile_already_exists,
- Fcons (build_string ("File already exists"),
- Fcons (absname, Qnil)));
- GCPRO1 (absname);
- tem = Fyes_or_no_p (format1 ("File %s already exists; %s anyway? ",
- XSTRING (absname)->data, querystring));
- UNGCPRO;
- if (NULL (tem))
- Fsignal (Qfile_already_exists,
- Fcons (build_string ("File already exists"),
- Fcons (absname, Qnil)));
- }
- return;
- }
-
- DEFUN ("copy-file", Fcopy_file, Scopy_file, 2, 4,
- "fCopy file: \nFCopy %s to file: \np",
- "Copy FILE to NEWNAME. Both args strings.\n\
- Signals a file-already-exists error if NEWNAME already exists,\n\
- unless a third argument OK-IF-ALREADY-EXISTS is supplied and non-nil.\n\
- A number as third arg means request confirmation if NEWNAME already exists.\n\
- This is what happens in interactive use with M-x.\n\
- Fourth arg non-nil means give the new file the same last-modified time\n\
- that the old one has. (This works on only some systems.)")
- (filename, newname, ok_if_already_exists, keep_date)
- Lisp_Object filename, newname, ok_if_already_exists, keep_date;
- {
- int ifd, ofd, n;
- char buf[16 * 1024];
- struct stat st;
- struct gcpro gcpro1, gcpro2;
-
- GCPRO2 (filename, newname);
- CHECK_STRING (filename, 0);
- CHECK_STRING (newname, 1);
- filename = Fexpand_file_name (filename, Qnil);
- newname = Fexpand_file_name (newname, Qnil);
- if (NULL (ok_if_already_exists)
- || XTYPE (ok_if_already_exists) == Lisp_Int)
- barf_or_query_if_file_exists (newname, "copy to it",
- XTYPE (ok_if_already_exists) == Lisp_Int);
-
- ifd = open (XSTRING (filename)->data, 0);
- if (ifd < 0)
- report_file_error ("Opening input file", Fcons (filename, Qnil));
-
- #ifdef VMS
- /* Create the copy file with the same record format as the input file */
- ofd = sys_creat (XSTRING (newname)->data, 0666, ifd);
- #else
- ofd = creat (XSTRING (newname)->data, 0666);
- #endif /* VMS */
- if (ofd < 0)
- {
- close (ifd);
- report_file_error ("Opening output file", Fcons (newname, Qnil));
- }
-
- while ((n = read (ifd, buf, sizeof buf)) > 0)
- if (write (ofd, buf, n) != n)
- {
- close (ifd);
- close (ofd);
- report_file_error ("I/O error", Fcons (newname, Qnil));
- }
-
- if (fstat (ifd, &st) >= 0)
- {
- #ifdef HAVE_TIMEVAL
- if (!NULL (keep_date))
- {
- #ifdef USE_UTIME
- /* AIX has utimes() in compatibility package, but it dies. So use good old
- utime interface instead. */
- struct {
- time_t atime;
- time_t mtime;
- } tv;
- tv.atime = st.st_atime;
- tv.mtime = st.st_mtime;
- utime (XSTRING (newname)->data, &tv);
- #else /* not USE_UTIME */
- struct timeval timevals[2];
- timevals[0].tv_sec = st.st_atime;
- timevals[1].tv_sec = st.st_mtime;
- timevals[0].tv_usec = timevals[1].tv_usec = 0;
- utimes (XSTRING (newname)->data, timevals);
- #endif /* not USE_UTIME */
- }
- #endif /* HAVE_TIMEVALS */
-
- #ifdef APOLLO
- if (!egetenv ("USE_DOMAIN_ACLS"))
- #endif
- chmod (XSTRING (newname)->data, st.st_mode & 07777);
- }
-
- close (ifd);
- if (close (ofd) < 0)
- report_file_error ("I/O error", Fcons (newname, Qnil));
-
- UNGCPRO;
- return Qnil;
- }
-
- DEFUN ("delete-file", Fdelete_file, Sdelete_file, 1, 1, "fDelete file: ",
- "Delete specified file. One argument, a file name string.\n\
- If file has multiple names, it continues to exist with the other names.")
- (filename)
- Lisp_Object filename;
- {
- CHECK_STRING (filename, 0);
- filename = Fexpand_file_name (filename, Qnil);
- if (0 > unlink (XSTRING (filename)->data))
- report_file_error ("Removing old name", Flist (1, &filename));
- return Qnil;
- }
-
- DEFUN ("rename-file", Frename_file, Srename_file, 2, 3,
- "fRename file: \nFRename %s to file: \np",
- "Rename FILE as NEWNAME. Both args strings.\n\
- If file has names other than FILE, it continues to have those names.\n\
- Signals a file-already-exists error if NEWNAME already exists\n\
- unless optional third argument OK-IF-ALREADY-EXISTS is non-nil.\n\
- A number as third arg means request confirmation if NEWNAME already exists.\n\
- This is what happens in interactive use with M-x.")
- (filename, newname, ok_if_already_exists)
- Lisp_Object filename, newname, ok_if_already_exists;
- {
- #ifdef NO_ARG_ARRAY
- Lisp_Object args[2];
- #endif
- struct gcpro gcpro1, gcpro2;
-
- GCPRO2 (filename, newname);
- CHECK_STRING (filename, 0);
- CHECK_STRING (newname, 1);
- filename = Fexpand_file_name (filename, Qnil);
- newname = Fexpand_file_name (newname, Qnil);
- if (NULL (ok_if_already_exists)
- || XTYPE (ok_if_already_exists) == Lisp_Int)
- barf_or_query_if_file_exists (newname, "rename to it",
- XTYPE (ok_if_already_exists) == Lisp_Int);
- #ifndef BSD4_1
- if (0 > rename (XSTRING (filename)->data, XSTRING (newname)->data))
- #else
- if (0 > link (XSTRING (filename)->data, XSTRING (newname)->data)
- || 0 > unlink (XSTRING (filename)->data))
- #endif
- {
- if (errno == EXDEV)
- {
- Fcopy_file (filename, newname, ok_if_already_exists, Qt);
- Fdelete_file (filename);
- }
- else
- #ifdef NO_ARG_ARRAY
- {
- args[0] = filename;
- args[1] = newname;
- report_file_error ("Renaming", Flist (2, args));
- }
- #else
- report_file_error ("Renaming", Flist (2, &filename));
- #endif
- }
- UNGCPRO;
- return Qnil;
- }
-
- DEFUN ("add-name-to-file", Fadd_name_to_file, Sadd_name_to_file, 2, 3,
- "fAdd name to file: \nFName to add to %s: \np",
- "Give FILE additional name NEWNAME. Both args strings.\n\
- Signals a file-already-exists error if NEWNAME already exists\n\
- unless optional third argument OK-IF-ALREADY-EXISTS is non-nil.\n\
- A number as third arg means request confirmation if NEWNAME already exists.\n\
- This is what happens in interactive use with M-x.")
- (filename, newname, ok_if_already_exists)
- Lisp_Object filename, newname, ok_if_already_exists;
- {
- #ifdef NO_ARG_ARRAY
- Lisp_Object args[2];
- #endif
- struct gcpro gcpro1, gcpro2;
-
- GCPRO2 (filename, newname);
- CHECK_STRING (filename, 0);
- CHECK_STRING (newname, 1);
- filename = Fexpand_file_name (filename, Qnil);
- newname = Fexpand_file_name (newname, Qnil);
- if (NULL (ok_if_already_exists)
- || XTYPE (ok_if_already_exists) == Lisp_Int)
- barf_or_query_if_file_exists (newname, "make it a new name",
- XTYPE (ok_if_already_exists) == Lisp_Int);
- unlink (XSTRING (newname)->data);
- if (0 > link (XSTRING (filename)->data, XSTRING (newname)->data))
- {
- #ifdef NO_ARG_ARRAY
- args[0] = filename;
- args[1] = newname;
- report_file_error ("Adding new name", Flist (2, args));
- #else
- report_file_error ("Adding new name", Flist (2, &filename));
- #endif
- }
-
- UNGCPRO;
- return Qnil;
- }
-
- #ifdef S_IFLNK
- DEFUN ("make-symbolic-link", Fmake_symbolic_link, Smake_symbolic_link, 2, 3,
- "sMake symbolic link to file: \nFMake symbolic link to file %s: \np",
- "Make a symbolic link to TARGET, named LINKNAME. Both args strings.\n\
- There is no completion for LINKNAME, because it is read simply as a string;\n\
- this is to enable you to make a link to a relative file name.\n\n\
- Signals a file-already-exists error if LINKNAME already exists\n\
- unless optional third argument OK-IF-ALREADY-EXISTS is non-nil.\n\
- A number as third arg means request confirmation if LINKNAME already exists.\n\
- This happens for interactive use with M-x.")
- (filename, newname, ok_if_already_exists)
- Lisp_Object filename, newname, ok_if_already_exists;
- {
- #ifdef NO_ARG_ARRAY
- Lisp_Object args[2];
- #endif
- struct gcpro gcpro1, gcpro2;
-
- GCPRO2 (filename, newname);
- CHECK_STRING (filename, 0);
- CHECK_STRING (newname, 1);
- #if 0 /* This made it impossible to make a link to a relative name. */
- filename = Fexpand_file_name (filename, Qnil);
- #endif
- newname = Fexpand_file_name (newname, Qnil);
- if (NULL (ok_if_already_exists)
- || XTYPE (ok_if_already_exists) == Lisp_Int)
- barf_or_query_if_file_exists (newname, "make it a link",
- XTYPE (ok_if_already_exists) == Lisp_Int);
- if (0 > symlink (XSTRING (filename)->data, XSTRING (newname)->data))
- {
- int failure = 1;
- /* If we failed because the link name already exists,
- try deleting it. */
- if (errno == EEXIST)
- {
- unlink (XSTRING (newname)->data);
- failure = 0 > symlink (XSTRING (filename)->data,
- XSTRING (newname)->data);
- }
- /* If we have not started to win, report the error. */
- if (failure)
- {
- #ifdef NO_ARG_ARRAY
- args[0] = filename;
- args[1] = newname;
- report_file_error ("Making symbolic link", Flist (2, args));
- #else
- report_file_error ("Making symbolic link", Flist (2, &filename));
- #endif
- }
- }
- UNGCPRO;
- return Qnil;
- }
- #endif /* S_IFLNK */
-
- #ifdef VMS
-
- DEFUN ("define-logical-name", Fdefine_logical_name, Sdefine_logical_name,
- 2, 2,
- "sDefine logical name: \nsDefine logical name %s as: ",
- "Define the job-wide logical name NAME to have the value STRING.\n\
- If STRING is nil or a null string, the logical name NAME is deleted.")
- (varname, string)
- Lisp_Object varname;
- Lisp_Object string;
- {
- CHECK_STRING (varname, 0);
- if (NULL (string))
- delete_logical_name (XSTRING (varname)->data);
- else
- {
- CHECK_STRING (string, 1);
-
- if (XSTRING (string)->size == 0)
- delete_logical_name (XSTRING (varname)->data);
- else
- define_logical_name (XSTRING (varname)->data, XSTRING (string)->data);
- }
-
- return string;
- }
- #endif /* VMS */
-
- #ifdef HPUX_NET
-
- DEFUN ("sysnetunam", Fsysnetunam, Ssysnetunam, 2, 2, 0,
- "Open a network connection to PATH using LOGIN as the login string.")
- (path, login)
- Lisp_Object path, login;
- {
- int netresult;
-
- CHECK_STRING (path, 0);
- CHECK_STRING (login, 0);
-
- netresult = netunam (XSTRING (path)->data, XSTRING (login)->data);
-
- if (netresult == -1)
- return Qnil;
- else
- return Qt;
- }
- #endif /* HPUX_NET */
-
- DEFUN ("file-name-absolute-p", Ffile_name_absolute_p, Sfile_name_absolute_p,
- 1, 1, 0,
- "Return t if file FILENAME specifies an absolute path name.")
- (filename)
- Lisp_Object filename;
- {
- unsigned char *ptr;
-
- CHECK_STRING (filename, 0);
- ptr = XSTRING (filename)->data;
- if (*ptr == '/' || *ptr == '~'
- #ifdef VMS
- /* ??? This criterion is probably wrong for '<'. */
- || index (ptr, ':') || index (ptr, '<')
- || (*ptr == '[' && (ptr[1] != '-' || (ptr[2] != '.' && ptr[2] != ']'))
- && ptr[1] != '.')
- #endif /* VMS */
- )
- return Qt;
- else
- return Qnil;
- }
-
- DEFUN ("file-exists-p", Ffile_exists_p, Sfile_exists_p, 1, 1, 0,
- "Return t if file FILENAME exists. (This does not mean you can read it.)\n\
- See also file-readable-p and file-attributes.")
- (filename)
- Lisp_Object filename;
- {
- Lisp_Object abspath;
- struct stat sb;
-
- CHECK_STRING (filename, 0);
- abspath = Fexpand_file_name (filename, Qnil);
- #ifdef S_IFLNK
- return (lstat (XSTRING (abspath)->data, &sb) >= 0) ? Qt : Qnil;
- #else
- return (stat (XSTRING (abspath)->data, &sb) >= 0) ? Qt : Qnil;
- #endif
- }
-
- DEFUN ("file-readable-p", Ffile_readable_p, Sfile_readable_p, 1, 1, 0,
- "Return t if file FILENAME exists and you can read it.\n\
- See also file-exists-p and file-attributes.")
- (filename)
- Lisp_Object filename;
- {
- Lisp_Object abspath;
-
- CHECK_STRING (filename, 0);
- abspath = Fexpand_file_name (filename, Qnil);
- return (access (XSTRING (abspath)->data, 4) >= 0) ? Qt : Qnil;
- }
-
- DEFUN ("file-symlink-p", Ffile_symlink_p, Sfile_symlink_p, 1, 1, 0,
- "If file FILENAME is the name of a symbolic link\n\
- returns the name of the file to which it is linked.\n\
- Otherwise returns NIL.")
- (filename)
- Lisp_Object filename;
- {
- #ifdef S_IFLNK
- char *buf;
- int bufsize;
- int valsize;
- Lisp_Object val;
-
- CHECK_STRING (filename, 0);
- filename = Fexpand_file_name (filename, Qnil);
-
- bufsize = 100;
- while (1)
- {
- buf = (char *) xmalloc (bufsize);
- bzero (buf, bufsize);
- valsize = readlink (XSTRING (filename)->data, buf, bufsize);
- if (valsize < bufsize) break;
- /* Buffer was not long enough */
- free (buf);
- bufsize *= 2;
- }
- if (valsize == -1)
- {
- free (buf);
- return Qnil;
- }
- val = make_string (buf, valsize);
- free (buf);
- return val;
- #else /* not S_IFLNK */
- return Qnil;
- #endif /* not S_IFLNK */
- }
-
- /* Having this before file-symlink-p mysteriously caused it to be forgotten
- on the RT/PC. */
- DEFUN ("file-writable-p", Ffile_writable_p, Sfile_writable_p, 1, 1, 0,
- "Return t if file FILENAME can be written or created by you.")
- (filename)
- Lisp_Object filename;
- {
- Lisp_Object abspath, dir;
-
- CHECK_STRING (filename, 0);
- abspath = Fexpand_file_name (filename, Qnil);
- if (access (XSTRING (abspath)->data, 0) >= 0)
- return (access (XSTRING (abspath)->data, 2) >= 0) ? Qt : Qnil;
- dir = Ffile_name_directory (abspath);
- #ifdef VMS
- if (!NULL (dir))
- dir = Fdirectory_file_name (dir);
- #endif /* VMS */
- return (access (!NULL (dir) ? (char *) XSTRING (dir)->data : "", 2) >= 0
- ? Qt : Qnil);
- }
-
- DEFUN ("file-directory-p", Ffile_directory_p, Sfile_directory_p, 1, 1, 0,
- "Return t if file FILENAME is the name of a directory as a file.\n\
- A directory name spec may be given instead; then the value is t\n\
- if the directory so specified exists and really is a directory.")
- (filename)
- Lisp_Object filename;
- {
- register Lisp_Object abspath;
- struct stat st;
-
- abspath = expand_and_dir_to_file (filename, current_buffer->directory);
-
- if (stat (XSTRING (abspath)->data, &st) < 0)
- return Qnil;
- return (st.st_mode & S_IFMT) == S_IFDIR ? Qt : Qnil;
- }
-
- DEFUN ("file-modes", Ffile_modes, Sfile_modes, 1, 1, 0,
- "Return mode bits of FILE, as an integer.")
- (filename)
- Lisp_Object filename;
- {
- Lisp_Object abspath;
- struct stat st;
-
- abspath = expand_and_dir_to_file (filename, current_buffer->directory);
-
- if (stat (XSTRING (abspath)->data, &st) < 0)
- return Qnil;
- return make_number (st.st_mode & 07777);
- }
-
- DEFUN ("set-file-modes", Fset_file_modes, Sset_file_modes, 2, 2, 0,
- "Set mode bits of FILE to MODE (an integer).\n\
- Only the 12 low bits of MODE are used.")
- (filename, mode)
- Lisp_Object filename, mode;
- {
- Lisp_Object abspath;
-
- abspath = Fexpand_file_name (filename, current_buffer->directory);
- CHECK_NUMBER (mode, 1);
-
- #ifndef APOLLO
- if (chmod (XSTRING (abspath)->data, XINT (mode)) < 0)
- report_file_error ("Doing chmod", Fcons (abspath, Qnil));
- #else /* APOLLO */
- if (!egetenv ("USE_DOMAIN_ACLS"))
- {
- struct stat st;
- struct timeval tvp[2];
-
- /* chmod on apollo also change the file's modtime; need to save the
- modtime and then restore it. */
- if (stat (XSTRING (abspath)->data, &st) < 0)
- {
- report_file_error ("Doing chmod", Fcons (abspath, Qnil));
- return (Qnil);
- }
-
- if (chmod (XSTRING (abspath)->data, XINT (mode)) < 0)
- report_file_error ("Doing chmod", Fcons (abspath, Qnil));
-
- /* reset the old accessed and modified times. */
- tvp[0].tv_sec = st.st_atime + 1; /* +1 due to an Apollo roundoff bug */
- tvp[0].tv_usec = 0;
- tvp[1].tv_sec = st.st_mtime + 1; /* +1 due to an Apollo roundoff bug */
- tvp[1].tv_usec = 0;
-
- if (utimes (XSTRING (abspath)->data, tvp) < 0)
- report_file_error ("Doing utimes", Fcons (abspath, Qnil));
- }
- #endif /* APOLLO */
-
- return Qnil;
- }
-
- DEFUN ("file-newer-than-file-p", Ffile_newer_than_file_p, Sfile_newer_than_file_p, 2, 2, 0,
- "Return t if file FILE1 is newer than file FILE2.\n\
- If FILE1 does not exist, the answer is nil;\n\
- otherwise, if FILE2 does not exist, the answer is t.")
- (file1, file2)
- Lisp_Object file1, file2;
- {
- Lisp_Object abspath;
- struct stat st;
- int mtime1;
-
- CHECK_STRING (file1, 0);
- CHECK_STRING (file2, 0);
-
- abspath = expand_and_dir_to_file (file1, current_buffer->directory);
-
- if (stat (XSTRING (abspath)->data, &st) < 0)
- return Qnil;
-
- mtime1 = st.st_mtime;
-
- abspath = expand_and_dir_to_file (file2, current_buffer->directory);
-
- if (stat (XSTRING (abspath)->data, &st) < 0)
- return Qt;
-
- return (mtime1 > st.st_mtime) ? Qt : Qnil;
- }
-
- close_file_unwind (fd)
- Lisp_Object fd;
- {
- close (XFASTINT (fd));
- }
-
- DEFUN ("insert-file-contents", Finsert_file_contents, Sinsert_file_contents,
- 1, 2, 0,
- "Insert contents of file FILENAME after point.\n\
- Returns list of absolute pathname and length of data inserted.\n\
- If second argument VISIT is non-nil, the buffer's visited filename\n\
- and last save file modtime are set, and it is marked unmodified.\n\
- If visiting and the file does not exist, visiting is completed\n\
- before the error is signaled.")
- (filename, visit)
- Lisp_Object filename, visit;
- {
- struct stat st;
- register int fd;
- register int inserted = 0;
- register int i = 0;
- int count = specpdl_ptr - specpdl;
- struct gcpro gcpro1;
-
- GCPRO1 (filename);
- if (!NULL (current_buffer->read_only))
- Fbarf_if_buffer_read_only();
-
- CHECK_STRING (filename, 0);
- filename = Fexpand_file_name (filename, Qnil);
-
- fd = -1;
-
- #ifndef APOLLO
- if (stat (XSTRING (filename)->data, &st) < 0
- #if defined (AIX) && defined (S_ISMPX)
- /* Don't let emacs open /dev/pts, as it causes kernel confusion. */
- || S_ISMPX (st.st_mode)
- #endif
- || (fd = open (XSTRING (filename)->data, 0)) < 0)
- #else
- if ((fd = open (XSTRING (filename)->data, 0)) < 0
- || fstat (fd, &st) < 0)
- #endif /* not APOLLO */
- {
- if (fd >= 0) close (fd);
- if (NULL (visit))
- report_file_error ("Opening input file", Fcons (filename, Qnil));
- st.st_mtime = -1;
- goto notfound;
- }
-
- record_unwind_protect (close_file_unwind, make_number (fd));
-
- #ifdef VMS
- /* VAXCRTL adds implied carriage control to certain record types. */
- if (st.st_fab_rfm == FAB$C_FIX
- && (st.st_fab_rat & (FAB$M_FTN | FAB$M_CR) != 0))
- st.st_size += st.st_size / st.st_fab_mrs;
- #endif
-
- /* Supposedly happens on VMS. */
- if (st.st_size < 0)
- error ("File size is negative");
- {
- register Lisp_Object temp;
-
- /* Make sure point-max won't overflow after this insertion. */
- XSET (temp, Lisp_Int, st.st_size + Z);
- if (st.st_size + Z != XINT (temp))
- error ("maximum buffer size exceeded");
- }
-
- if (NULL (visit))
- prepare_to_modify_buffer ();
-
- move_gap (point);
- if (GAP_SIZE < st.st_size)
- make_gap (st.st_size - GAP_SIZE);
-
- while (1)
- {
- int try = min (st.st_size - inserted, 64 << 10);
- int this = read (fd, &FETCH_CHAR (point + inserted - 1) + 1, try);
-
- if (this <= 0)
- {
- i = this;
- break;
- }
-
- GPT += this;
- GAP_SIZE -= this;
- ZV += this;
- Z += this;
- inserted += this;
- }
-
- if (inserted > 0)
- MODIFF++;
- record_insert (point, inserted);
-
- close (fd);
-
- /* Discard the unwind protect */
- specpdl_ptr = specpdl + count;
-
- if (i < 0)
- error ("IO error reading %s: %s",
- XSTRING (filename)->data, err_str (errno));
-
- notfound:
-
- if (!NULL (visit))
- {
- current_buffer->undo_list = Qnil;
- #ifdef APOLLO
- stat (XSTRING (filename)->data, &st);
- #endif
- current_buffer->modtime = st.st_mtime;
- current_buffer->save_modified = MODIFF;
- current_buffer->auto_save_modified = MODIFF;
- XFASTINT (current_buffer->save_length) = Z - BEG;
- #ifdef CLASH_DETECTION
- if (!NULL (current_buffer->filename))
- unlock_file (current_buffer->filename);
- unlock_file (filename);
- #endif /* CLASH_DETECTION */
- current_buffer->filename = filename;
- /* If visiting nonexistent file, return nil. */
- if (st.st_mtime == -1)
- report_file_error ("Opening input file", Fcons (filename, Qnil));
- }
-
- UNGCPRO;
- return Fcons (filename, Fcons (make_number (inserted), Qnil));
- }
-
- DEFUN ("write-region", Fwrite_region, Swrite_region, 3, 5,
- "r\nFWrite region to file: ",
- "Write current region into specified file.\n\
- When called from a program, takes three arguments:\n\
- START, END and FILENAME. START and END are buffer positions.\n\
- Optional fourth argument APPEND if non-nil means\n\
- append to existing file contents (if any).\n\
- Optional fifth argument VISIT if t means\n\
- set last-save-file-modtime of buffer to this file's modtime\n\
- and mark buffer not modified.\n\
- If VISIT is neither t nor nil, it means do not print\n\
- the \"Wrote file\" message.")
- (start, end, filename, append, visit)
- Lisp_Object start, end, filename, append, visit;
- {
- register int desc;
- int failure;
- int save_errno;
- unsigned char *fn;
- struct stat st;
- int tem;
- int count = specpdl_ptr - specpdl;
- #ifdef VMS
- unsigned char *fname = 0; /* If non-0, original filename (must rename) */
- #endif /* VMS */
-
- /* Special kludge to simplify auto-saving */
- if (NULL (start))
- {
- XFASTINT (start) = BEG;
- XFASTINT (end) = Z;
- }
- else
- validate_region (&start, &end);
-
- filename = Fexpand_file_name (filename, Qnil);
- fn = XSTRING (filename)->data;
-
- #ifdef CLASH_DETECTION
- if (!auto_saving)
- lock_file (filename);
- #endif /* CLASH_DETECTION */
-
- desc = -1;
- if (!NULL (append))
- desc = open (fn, O_WRONLY);
-
- if (desc < 0)
- #ifdef VMS
- if (auto_saving) /* Overwrite any previous version of autosave file */
- {
- vms_truncate (fn); /* if fn exists, truncate to zero length */
- desc = open (fn, O_RDWR);
- if (desc < 0)
- desc = creat_copy_attrs (XTYPE (current_buffer->filename) == Lisp_String
- ? XSTRING (current_buffer->filename)->data : 0,
- fn);
- }
- else /* Write to temporary name and rename if no errors */
- {
- Lisp_Object temp_name;
- temp_name = Ffile_name_directory (filename);
-
- if (!NULL (temp_name))
- {
- temp_name = Fmake_temp_name (concat2 (temp_name,
- build_string ("$$SAVE$$")));
- fname = XSTRING (filename)->data;
- fn = XSTRING (temp_name)->data;
- desc = creat_copy_attrs (fname, fn);
- if (desc < 0)
- {
- /* If we can't open the temporary file, try creating a new
- version of the original file. VMS "creat" creates a
- new version rather than truncating an existing file. */
- fn = fname;
- fname = 0;
- desc = creat (fn, 0666);
- #if 0
- if (desc < 0)
- {
- /* We can't make a new version;
- try to truncate and rewrite existing version if any. */
- vms_truncate (fn);
- desc = open (fn, O_RDWR);
- }
- #endif
- }
- }
- else
- desc = creat (fn, 0666);
- }
- #else /* not VMS */
- desc = creat (fn, 0666);
- #endif /* not VMS */
-
- if (desc < 0)
- {
- #ifdef CLASH_DETECTION
- save_errno = errno;
- if (!auto_saving) unlock_file (filename);
- errno = save_errno;
- #endif /* CLASH_DETECTION */
- report_file_error ("Opening output file", Fcons (filename, Qnil));
- }
-
- record_unwind_protect (close_file_unwind, make_number (desc));
-
- if (!NULL (append))
- if (lseek (desc, 0, 2) < 0)
- {
- #ifdef CLASH_DETECTION
- if (!auto_saving) unlock_file (filename);
- #endif /* CLASH_DETECTION */
- report_file_error ("Lseek error", Fcons (filename, Qnil));
- }
-
- #ifdef VMS
- /*
- * Kludge Warning: The VMS C RTL likes to insert carriage returns
- * if we do writes that don't end with a carriage return. Furthermore
- * it cannot handle writes of more then 16K. The modified
- * version of "sys_write" in SYSDEP.C (see comment there) copes with
- * this EXCEPT for the last record (iff it doesn't end with a carriage
- * return). This implies that if your buffer doesn't end with a carriage
- * return, you get one free... tough. However it also means that if
- * we make two calls to sys_write (a la the following code) you can
- * get one at the gap as well. The easiest way to fix this (honest)
- * is to move the gap to the next newline (or the end of the buffer).
- * Thus this change.
- *
- * Yech!
- */
- if (GPT > BEG && GPT_ADDR[-1] != '\n')
- move_gap (find_next_newline (GPT, 1));
- #endif
-
- failure = 0;
- if (XINT (start) != XINT (end))
- {
- if (XINT (start) < GPT)
- {
- register int end1 = XINT (end);
- tem = XINT (start);
- failure = 0 > e_write (desc, &FETCH_CHAR (tem),
- min (GPT, end1) - tem);
- save_errno = errno;
- }
-
- if (XINT (end) > GPT && !failure)
- {
- tem = XINT (start);
- tem = max (tem, GPT);
- failure = 0 > e_write (desc, &FETCH_CHAR (tem), XINT (end) - tem);
- save_errno = errno;
- }
- }
-
- #ifndef USG
- #ifndef VMS
- #ifndef BSD4_1
- /* Note fsync appears to change the modtime on BSD4.2 (both vax and sun).
- Disk full in NFS may be reported here. */
- if (fsync (desc) < 0)
- failure = 1, save_errno = errno;
- #endif
- #endif
- #endif
-
- #if 0
- /* Spurious "file has changed on disk" warnings have been
- observed on Sun 3 as well. Maybe close changes the modtime
- with nfs as well. */
-
- /* On VMS and APOLLO, must do the stat after the close
- since closing changes the modtime. */
- #ifndef VMS
- #ifndef APOLLO
- /* Recall that #if defined does not work on VMS. */
- #define FOO
- fstat (desc, &st);
- #endif
- #endif
- #endif /* 0 */
-
- /* NFS can report a write failure now. */
- if (close (desc) < 0)
- failure = 1, save_errno = errno;
-
- #ifdef VMS
- /* If we wrote to a temporary name and had no errors, rename to real name. */
- if (fname)
- {
- if (!failure)
- failure = (rename_sans_version (fn, fname) != 0), save_errno = errno;
- fn = vms_file_written; /* this is filled by rename_sans_version */
- }
- #endif /* VMS */
-
- #ifndef FOO
- stat (fn, &st);
- #endif
- /* Discard the unwind protect */
- specpdl_ptr = specpdl + count;
-
- #ifdef CLASH_DETECTION
- if (!auto_saving)
- unlock_file (filename);
- #endif /* CLASH_DETECTION */
-
- /* Do this before reporting IO error
- to avoid a "file has changed on disk" warning on
- next attempt to save. */
- if (EQ (visit, Qt))
- current_buffer->modtime = st.st_mtime;
-
- if (failure)
- error ("IO error writing %s: %s", fn, err_str (save_errno));
-
- if (EQ (visit, Qt))
- {
- current_buffer->save_modified = MODIFF;
- XFASTINT (current_buffer->save_length) = Z - BEG;
- current_buffer->filename = filename;
- }
- else if (!NULL (visit))
- return Qnil;
-
- if (!auto_saving)
- message ("Wrote %s", fn);
-
- return Qnil;
- }
-
- int
- e_write (desc, addr, len)
- int desc;
- register char *addr;
- register int len;
- {
- char buf[16 * 1024];
- register char *p, *end;
-
- if (!EQ (current_buffer->selective_display, Qt))
- return write (desc, addr, len) - len;
- else
- {
- p = buf;
- end = p + sizeof buf;
- while (len--)
- {
- if (p == end)
- {
- if (write (desc, buf, sizeof buf) != sizeof buf)
- return -1;
- p = buf;
- }
- *p = *addr++;
- if (*p++ == '\015')
- p[-1] = '\n';
- }
- if (p != buf)
- if (write (desc, buf, p - buf) != p - buf)
- return -1;
- }
- return 0;
- }
-
- DEFUN ("verify-visited-file-modtime", Fverify_visited_file_modtime,
- Sverify_visited_file_modtime, 1, 1, 0,
- "Return t if last mod time of BUF's visited file matches what BUF records.\n\
- This means that the file has not been changed since it was visited or saved.")
- (buf)
- Lisp_Object buf;
- {
- struct buffer *b;
- struct stat st;
-
- CHECK_BUFFER (buf, 0);
- b = XBUFFER (buf);
-
- if (XTYPE (b->filename) != Lisp_String) return Qt;
- if (b->modtime == 0) return Qt;
-
- if (stat (XSTRING (b->filename)->data, &st) < 0)
- {
- /* If the file doesn't exist now and didn't exist before,
- we say that it isn't modified, provided the error is a tame one. */
- if (errno == ENOENT || errno == EACCES || errno == ENOTDIR)
- st.st_mtime = -1;
- else
- st.st_mtime = 0;
- }
- if (st.st_mtime == b->modtime
- /* If both are positive, accept them if they are off by one second. */
- || (st.st_mtime > 0 && b->modtime > 0
- && (st.st_mtime == b->modtime + 1
- || st.st_mtime == b->modtime - 1)))
- return Qt;
- return Qnil;
- }
-
- DEFUN ("clear-visited-file-modtime", Fclear_visited_file_modtime,
- Sclear_visited_file_modtime, 0, 0, 0,
- "Clear out records of last mod time of visited file.\n\
- Next attempt to save will certainly not complain of a discrepancy.")
- ()
- {
- current_buffer->modtime = 0;
- return Qnil;
- }
-
- Lisp_Object
- auto_save_error ()
- {
- unsigned char *name = XSTRING (current_buffer->name)->data;
-
- bell ();
- message ("Autosaving...error for %s", name);
- Fsleep_for (make_number (1));
- message ("Autosaving...error!for %s", name);
- Fsleep_for (make_number (1));
- message ("Autosaving...error for %s", name);
- Fsleep_for (make_number (1));
- return Qnil;
- }
-
- Lisp_Object
- auto_save_1 ()
- {
- return
- Fwrite_region (Qnil, Qnil,
- current_buffer->auto_save_file_name,
- Qnil, Qlambda);
- }
-
- DEFUN ("do-auto-save", Fdo_auto_save, Sdo_auto_save, 0, 1, "",
- "Auto-save all buffers that need it.\n\
- This is all buffers that have auto-saving enabled\n\
- and are changed since last auto-saved.\n\
- Auto-saving writes the buffer into a file\n\
- so that your editing is not lost if the system crashes.\n\
- This file is not the file you visited; that changes only when you save.\n\n\
- Non-nil argument means do not print any message if successful.")
- (nomsg)
- Lisp_Object nomsg;
- {
- struct buffer *old = current_buffer, *b;
- Lisp_Object tail, buf;
- int auto_saved = 0;
- int tried = 0;
- char *omessage = echo_area_contents;
- /* No GCPRO needed, because (when it matters) all Lisp_Object variables
- point to non-strings reached from Vbuffer_alist. */
-
- auto_saving = 1;
- if (minibuf_level)
- nomsg = Qt;
-
- for (tail = Vbuffer_alist; XGCTYPE (tail) == Lisp_Cons;
- tail = XCONS (tail)->cdr)
- {
- buf = XCONS (XCONS (tail)->car)->cdr;
- b = XBUFFER (buf);
- /* Check for auto save enabled
- and file changed since last auto save
- and file changed since last real save. */
- if (XTYPE (b->auto_save_file_name) == Lisp_String
- && b->save_modified < BUF_MODIFF (b)
- && b->auto_save_modified < BUF_MODIFF (b))
- {
- /* If we at least consider a buffer for auto-saving,
- don't try again for a suitable time. */
- tried++;
- if ((XFASTINT (b->save_length) * 10
- > (BUF_Z (b) - BUF_BEG (b)) * 13)
- /* A short file is likely to change a large fraction;
- spare the user annoying messages. */
- && XFASTINT (b->save_length) > 5000
- /* These messages are frequent and annoying for `*mail*'. */
- && !EQ (b->filename, Qnil))
- {
- /* It has shrunk too much; don't checkpoint. */
- message ("Buffer %s has shrunk a lot; not autosaving it",
- XSTRING (b->name)->data);
- Fsleep_for (make_number (1));
- continue;
- }
- set_buffer_internal (b);
- if (!auto_saved && NULL (nomsg))
- message1 ("Auto-saving...");
- internal_condition_case (auto_save_1, Qt, auto_save_error);
- auto_saved++;
- b->auto_save_modified = BUF_MODIFF (b);
- XFASTINT (current_buffer->save_length) = Z - BEG;
- set_buffer_internal (old);
- }
- }
-
- if (tried)
- record_auto_save ();
-
- if (auto_saved && NULL (nomsg))
- message1 (omessage ? omessage : "Auto-saving...done");
-
- auto_saving = 0;
- return Qnil;
- }
-
- DEFUN ("set-buffer-auto-saved", Fset_buffer_auto_saved,
- Sset_buffer_auto_saved, 0, 0, 0,
- "Mark current buffer as auto-saved with its current text.\n\
- No auto-save file will be written until the buffer changes again.")
- ()
- {
- current_buffer->auto_save_modified = MODIFF;
- XFASTINT (current_buffer->save_length) = Z - BEG;
- return Qnil;
- }
-
- DEFUN ("recent-auto-save-p", Frecent_auto_save_p, Srecent_auto_save_p,
- 0, 0, 0,
- "Return t if buffer has been auto-saved since last read in or saved.")
- ()
- {
- return (current_buffer->save_modified < current_buffer->auto_save_modified) ? Qt : Qnil;
- }
-
- /* Reading and completing file names */
- extern Lisp_Object Ffile_name_completion (), Ffile_name_all_completions ();
-
- DEFUN ("read-file-name-internal", Fread_file_name_internal, Sread_file_name_internal,
- 3, 3, 0,
- "Internal subroutine for read-file-name. Do not call this.")
- (string, dir, action)
- Lisp_Object string, dir, action;
- /* action is nil for complete, t for return list of completions,
- lambda for verify final value */
- {
- Lisp_Object name, specdir, realdir, val;
- if (XSTRING (string)->size == 0)
- {
- name = string;
- realdir = dir;
- if (EQ (action, Qlambda))
- return Qnil;
- }
- else
- {
- string = Fsubstitute_in_file_name (string);
- name = Ffile_name_nondirectory (string);
- realdir = Ffile_name_directory (string);
- if (NULL (realdir))
- realdir = dir;
- else
- realdir = Fexpand_file_name (realdir, dir);
- }
-
- if (NULL (action))
- {
- specdir = Ffile_name_directory (string);
- val = Ffile_name_completion (name, realdir);
- if (XTYPE (val) != Lisp_String)
- return (val);
-
- if (!NULL (specdir))
- val = concat2 (specdir, val);
- #ifndef VMS
- {
- register unsigned char *old, *new;
- register int n;
- int osize, count;
-
- osize = XSTRING (val)->size;
- /* Quote "$" as "$$" to get it past substitute-in-file-name */
- for (n = osize, count = 0, old = XSTRING (val)->data; n > 0; n--)
- if (*old++ == '$') count++;
- if (count > 0)
- {
- old = XSTRING (val)->data;
- val = Fmake_string (make_number (osize + count), make_number (0));
- new = XSTRING (val)->data;
- for (n = osize; n > 0; n--)
- if (*old != '$')
- *new++ = *old++;
- else
- {
- *new++ = '$';
- *new++ = '$';
- old++;
- }
- }
- }
- #endif /* Not VMS */
- return (val);
- }
-
- if (EQ (action, Qt))
- return Ffile_name_all_completions (name, realdir);
- /* Only other case actually used is ACTION = lambda */
- #ifdef VMS
- /* Supposedly this helps commands such as `cd' that read directory names,
- but can someone explain how it helps them? -- RMS */
- if (XSTRING (name)->size == 0)
- return Qt;
- #endif /* VMS */
- return Ffile_exists_p (string);
- }
-
- DEFUN ("read-file-name", Fread_file_name, Sread_file_name, 1, 4, 0,
- "Read file name, prompting with PROMPT and completing in directory DIR.\n\
- Value is not expanded! You must call expand-file-name yourself.\n\
- Default name to DEFAULT if user enters a null string.\n\
- Fourth arg MUSTMATCH non-nil means require existing file's name.\n\
- Non-nil and non-t means also require confirmation after completion.\n\
- DIR defaults to current buffer's directory default.")
- (prompt, dir, defalt, mustmatch)
- Lisp_Object prompt, dir, defalt, mustmatch;
- {
- Lisp_Object val, insdef, tem;
- struct gcpro gcpro1, gcpro2;
- register char *homedir;
- int count;
-
- if (NULL (dir))
- dir = current_buffer->directory;
- if (NULL (defalt))
- defalt = current_buffer->filename;
-
- /* If dir starts with user's homedir, change that to ~. */
- homedir = (char *) egetenv ("HOME");
- if (homedir != 0
- && XTYPE (dir) == Lisp_String
- && !strncmp (homedir, XSTRING (dir)->data, strlen (homedir))
- && XSTRING (dir)->data[strlen (homedir)] == '/')
- {
- dir = make_string (XSTRING (dir)->data + strlen (homedir) - 1,
- XSTRING (dir)->size - strlen (homedir) + 1);
- XSTRING (dir)->data[0] = '~';
- }
-
- if (insert_default_directory)
- insdef = dir;
- else
- insdef = build_string ("");
-
- #ifdef VMS
- count = specpdl_ptr - specpdl;
- specbind (intern ("completion-ignore-case"), Qt);
- #endif
-
- GCPRO2 (insdef, defalt);
- val = Fcompleting_read (prompt, intern ("read-file-name-internal"),
- dir, mustmatch,
- insert_default_directory ? insdef : Qnil);
-
- #ifdef VMS
- unbind_to (count);
- #endif
-
- UNGCPRO;
- if (NULL (val))
- error ("No file name specified");
- tem = Fstring_equal (val, insdef);
- if (!NULL (tem) && !NULL (defalt))
- return defalt;
- return Fsubstitute_in_file_name (val);
- }
-
- syms_of_fileio ()
- {
- Qfile_error = intern ("file-error");
- staticpro (&Qfile_error);
- Qfile_already_exists = intern("file-already-exists");
- staticpro (&Qfile_already_exists);
-
- Fput (Qfile_error, Qerror_conditions,
- Fcons (Qfile_error, Fcons (Qerror, Qnil)));
- Fput (Qfile_error, Qerror_message,
- build_string ("File error"));
-
- Fput (Qfile_already_exists, Qerror_conditions,
- Fcons (Qfile_already_exists,
- Fcons (Qfile_error, Fcons (Qerror, Qnil))));
- Fput (Qfile_already_exists, Qerror_message,
- build_string ("File already exists"));
-
- DEFVAR_BOOL ("insert-default-directory", &insert_default_directory,
- "*Non-nil means when reading a filename start with default dir in minibuffer.");
- insert_default_directory = 1;
-
- DEFVAR_BOOL ("vms-stmlf-recfm", &vms_stmlf_recfm,
- "*Non-nil means write new files with record format `stmlf'.\n\
- nil means use format `var'. This variable is meaningful only on VMS.");
- vms_stmlf_recfm = 0;
-
- defsubr (&Sfile_name_directory);
- defsubr (&Sfile_name_nondirectory);
- defsubr (&Sfile_name_as_directory);
- defsubr (&Sdirectory_file_name);
- defsubr (&Smake_temp_name);
- defsubr (&Sexpand_file_name);
- defsubr (&Ssubstitute_in_file_name);
- defsubr (&Scopy_file);
- defsubr (&Sdelete_file);
- defsubr (&Srename_file);
- defsubr (&Sadd_name_to_file);
- #ifdef S_IFLNK
- defsubr (&Smake_symbolic_link);
- #endif /* S_IFLNK */
- #ifdef VMS
- defsubr (&Sdefine_logical_name);
- #endif /* VMS */
- #ifdef HPUX_NET
- defsubr (&Ssysnetunam);
- #endif /* HPUX_NET */
- defsubr (&Sfile_name_absolute_p);
- defsubr (&Sfile_exists_p);
- defsubr (&Sfile_readable_p);
- defsubr (&Sfile_writable_p);
- defsubr (&Sfile_symlink_p);
- defsubr (&Sfile_directory_p);
- defsubr (&Sfile_modes);
- defsubr (&Sset_file_modes);
- defsubr (&Sfile_newer_than_file_p);
- defsubr (&Sinsert_file_contents);
- defsubr (&Swrite_region);
- defsubr (&Sverify_visited_file_modtime);
- defsubr (&Sclear_visited_file_modtime);
- defsubr (&Sdo_auto_save);
- defsubr (&Sset_buffer_auto_saved);
- defsubr (&Srecent_auto_save_p);
-
- defsubr (&Sread_file_name_internal);
- defsubr (&Sread_file_name);
- }
-