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Tue Sep 12 14:30:07 1995 Roland McGrath <roland@churchy.gnu.ai.mit.edu>

Browse Source 
* misc/mntent.c: New file.
	* misc/mntent.h: New file.
	* misc/Makefile (headers): Added mntent.h.
	(routines): Added mntent.
	* misc/fstab.c: Rewritten using mntent functions.

Mon Sep 11 14:00:14 1995  Roland McGrath  <roland@whiz-bang.gnu.ai.mit.edu>

	* posix/glob.c (glob): Comment fix.
This commit is contained in:
Roland McGrath
1995-09-14 09:00:06 +00:00
parent eef089c2ab
commit 7a770247ab
5 changed files with 288 additions and 184 deletions
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268
misc/fstab.c
View File

@@ -1,205 +1,109 @@
/*
* Copyright (c) 1980, 1988, 1993
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
/*
Copyright (C) 1995 Free Software Foundation, Inc.
This file is part of the GNU C Library.
#if defined(LIBC_SCCS) && !defined(lint)
static char sccsid[] = "@(#)fstab.c 8.1 (Berkeley) 6/4/93";
#endif /* LIBC_SCCS and not lint */
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public License as
published by the Free Software Foundation; either version 2 of the
License, or (at your option) any later version.
The GNU C Library 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with the GNU C Library; see the file COPYING.LIB. If
not, write to the Free Software Foundation, Inc., 675 Mass Ave,
Cambridge, MA 02139, USA. */
#include <errno.h>
#include <fstab.h>
#include <mntent.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#ifndef EFTYPE
#define EFTYPE EINVAL
#endif
static FILE *fstab;
static FILE *_fs_fp;
static struct fstab _fs_fstab;
static void error __P((int));
static int
fstabscan __P((void))
static FILE *
fstab_stream (void)
{
register char *cp;
#define MAXLINELENGTH 1024
static char line[MAXLINELENGTH];
char subline[MAXLINELENGTH];
int typexx;
if (! fstab)
fstab = setmntent (_PATH_FSTAB, "r");
return fstab;
}
for (;;) {
if (!(cp = fgets(line, sizeof(line), _fs_fp)))
return(0);
/* OLD_STYLE_FSTAB */
if (!strpbrk(cp, " \t")) {
_fs_fstab.fs_spec = strtok(cp, ":\n");
_fs_fstab.fs_file = strtok((char *)NULL, ":\n");
_fs_fstab.fs_type = strtok((char *)NULL, ":\n");
if (_fs_fstab.fs_type) {
if (!strcmp(_fs_fstab.fs_type, FSTAB_XX))
continue;
_fs_fstab.fs_mntops = _fs_fstab.fs_type;
_fs_fstab.fs_vfstype =
strcmp(_fs_fstab.fs_type, FSTAB_SW) ?
"ufs" : "swap";
if (cp = strtok((char *)NULL, ":\n")) {
_fs_fstab.fs_freq = atoi(cp);
if (cp = strtok((char *)NULL, ":\n")) {
_fs_fstab.fs_passno = atoi(cp);
return(1);
}
}
}
goto bad;
}
/* OLD_STYLE_FSTAB */
_fs_fstab.fs_spec = strtok(cp, " \t\n");
if (!_fs_fstab.fs_spec || *_fs_fstab.fs_spec == '#')
continue;
_fs_fstab.fs_file = strtok((char *)NULL, " \t\n");
_fs_fstab.fs_vfstype = strtok((char *)NULL, " \t\n");
_fs_fstab.fs_mntops = strtok((char *)NULL, " \t\n");
if (_fs_fstab.fs_mntops == NULL)
goto bad;
_fs_fstab.fs_freq = 0;
_fs_fstab.fs_passno = 0;
if ((cp = strtok((char *)NULL, " \t\n")) != NULL) {
_fs_fstab.fs_freq = atoi(cp);
if ((cp = strtok((char *)NULL, " \t\n")) != NULL)
_fs_fstab.fs_passno = atoi(cp);
}
strcpy(subline, _fs_fstab.fs_mntops);
for (typexx = 0, cp = strtok(subline, ","); cp;
cp = strtok((char *)NULL, ",")) {
if (strlen(cp) != 2)
continue;
if (!strcmp(cp, FSTAB_RW)) {
_fs_fstab.fs_type = FSTAB_RW;
break;
}
if (!strcmp(cp, FSTAB_RQ)) {
_fs_fstab.fs_type = FSTAB_RQ;
break;
}
if (!strcmp(cp, FSTAB_RO)) {
_fs_fstab.fs_type = FSTAB_RO;
break;
}
if (!strcmp(cp, FSTAB_SW)) {
_fs_fstab.fs_type = FSTAB_SW;
break;
}
if (!strcmp(cp, FSTAB_XX)) {
_fs_fstab.fs_type = FSTAB_XX;
typexx++;
break;
}
}
if (typexx)
continue;
if (cp != NULL)
return(1);
int
setfsent (void)
{
if (fstab)
{
rewind (fstab);
return 1;
}
else
fstab = setmntent (_PATH_FSTAB, "r");
return fstab ? 0 : 1;
}
bad: /* no way to distinguish between EOF and syntax error */
error(EFTYPE);
}
/* NOTREACHED */
static struct fstab *
mnt2fs (struct mntent *m)
{
static struct fstab f;
f.fs_spec = m->mnt_fsname;
f.fs_file = m->mnt_dir;
f.fs_vfstype = m->mnt_type;
f.fs_mntops = m->mnt_opts;
f.fs_type = (hasmntopt (m, FSTAB_RW) ? (char *) FSTAB_RW :
hasmntopt (m, FSTAB_RQ) ? (char *) FSTAB_RQ :
hasmntopt (m, FSTAB_RO) ? (char *) FSTAB_RO :
hasmntopt (m, FSTAB_SW) ? (char *) FSTAB_SW :
hasmntopt (m, FSTAB_XX) ? (char *) FSTAB_XX :
(char *) "??");
f.fs_freq = m->mnt_freq;
f.fs_passno = m->mnt_passno;
return &f;
}
struct fstab *
getfsent()
getfsent (void)
{
if (!_fs_fp && !setfsent() || !fstabscan())
return((struct fstab *)NULL);
return(&_fs_fstab);
FILE *s = fstab_stream ();
if (! s)
return NULL;
return mnt2fs (getmntent (s));
}
struct fstab *
getfsspec(name)
getfsspec (name)
register const char *name;
{
struct mntent *m;
if (setfsent ())
while (m = getmntent (fstab))
if (!strcmp (m->mnt_fsname, name))
return mnt2fs (m);
return NULL;
}
struct fstab *
getfsfile (name)
register const char *name;
{
if (setfsent())
while (fstabscan())
if (!strcmp(_fs_fstab.fs_spec, name))
return(&_fs_fstab);
return((struct fstab *)NULL);
}
struct fstab *
getfsfile(name)
register const char *name;
{
if (setfsent())
while (fstabscan())
if (!strcmp(_fs_fstab.fs_file, name))
return(&_fs_fstab);
return((struct fstab *)NULL);
}
setfsent()
{
if (_fs_fp) {
rewind(_fs_fp);
return(1);
}
if (_fs_fp = fopen(_PATH_FSTAB, "r"))
return(1);
error(errno);
return(0);
struct mntent *m;
if (setfsent ())
while (m = getmntent (fstab))
if (!strcmp (m->mnt_dir, name))
return mnt2fs (m);
return NULL;
}
void
endfsent()
endfsent ()
{
if (_fs_fp) {
(void)fclose(_fs_fp);
_fs_fp = NULL;
}
}
static void
error(err)
int err;
{
char *p;
(void)write(STDERR_FILENO, "fstab: ", 7);
(void)write(STDERR_FILENO, _PATH_FSTAB, sizeof(_PATH_FSTAB) - 1);
(void)write(STDERR_FILENO, ": ", 1);
p = strerror(err);
(void)write(STDERR_FILENO, p, strlen(p));
(void)write(STDERR_FILENO, "\n", 1);
if (fstab)
{
(void) endmntent (fstab);
fstab = NULL;
}
}