295 lines
6.7 KiB
C
295 lines
6.7 KiB
C
/*
|
|
* 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.
|
|
* 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.
|
|
*/
|
|
|
|
#if defined(LIBC_SCCS) && !defined(lint)
|
|
static char sccsid[] = "@(#)fstab.c 8.1 (Berkeley) 6/4/93";
|
|
#endif /* LIBC_SCCS and not lint */
|
|
#include <sys/cdefs.h>
|
|
__FBSDID("$FreeBSD$");
|
|
|
|
#include "namespace.h"
|
|
#include <sys/param.h>
|
|
#include <sys/mount.h>
|
|
#include <sys/stat.h>
|
|
|
|
#include <errno.h>
|
|
#include <fstab.h>
|
|
#include <paths.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <unistd.h>
|
|
#include "un-namespace.h"
|
|
|
|
static FILE *_fs_fp;
|
|
static struct fstab _fs_fstab;
|
|
static int LineNo = 0;
|
|
static char *path_fstab;
|
|
static char fstab_path[PATH_MAX];
|
|
static int fsp_set = 0;
|
|
|
|
static void error(int);
|
|
static void fixfsfile(void);
|
|
static int fstabscan(void);
|
|
|
|
void
|
|
setfstab(const char *file)
|
|
{
|
|
|
|
if (file == NULL) {
|
|
path_fstab = _PATH_FSTAB;
|
|
} else {
|
|
strncpy(fstab_path, file, PATH_MAX);
|
|
fstab_path[PATH_MAX - 1] = '\0';
|
|
path_fstab = fstab_path;
|
|
}
|
|
fsp_set = 1;
|
|
|
|
return;
|
|
}
|
|
|
|
const char *
|
|
getfstab (void)
|
|
{
|
|
|
|
if (fsp_set)
|
|
return (path_fstab);
|
|
else
|
|
return (_PATH_FSTAB);
|
|
}
|
|
|
|
static void
|
|
fixfsfile()
|
|
{
|
|
static char buf[sizeof(_PATH_DEV) + MNAMELEN];
|
|
struct stat sb;
|
|
struct statfs sf;
|
|
|
|
if (strcmp(_fs_fstab.fs_file, "/") != 0)
|
|
return;
|
|
if (statfs("/", &sf) != 0)
|
|
return;
|
|
if (sf.f_mntfromname[0] == '/')
|
|
buf[0] = '\0';
|
|
else
|
|
strcpy(buf, _PATH_DEV);
|
|
strcat(buf, sf.f_mntfromname);
|
|
if (stat(buf, &sb) != 0 ||
|
|
(!S_ISBLK(sb.st_mode) && !S_ISCHR(sb.st_mode)))
|
|
return;
|
|
_fs_fstab.fs_spec = buf;
|
|
}
|
|
|
|
static int
|
|
fstabscan()
|
|
{
|
|
char *cp, *p;
|
|
#define MAXLINELENGTH 1024
|
|
static char line[MAXLINELENGTH];
|
|
char subline[MAXLINELENGTH];
|
|
int typexx;
|
|
|
|
for (;;) {
|
|
|
|
if (!(p = fgets(line, sizeof(line), _fs_fp)))
|
|
return(0);
|
|
/* OLD_STYLE_FSTAB */
|
|
++LineNo;
|
|
if (*line == '#' || *line == '\n')
|
|
continue;
|
|
if (!strpbrk(p, " \t")) {
|
|
_fs_fstab.fs_spec = strsep(&p, ":\n");
|
|
_fs_fstab.fs_file = strsep(&p, ":\n");
|
|
fixfsfile();
|
|
_fs_fstab.fs_type = strsep(&p, ":\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 = strsep(&p, ":\n")) != NULL) {
|
|
_fs_fstab.fs_freq = atoi(cp);
|
|
if ((cp = strsep(&p, ":\n")) != NULL) {
|
|
_fs_fstab.fs_passno = atoi(cp);
|
|
return(1);
|
|
}
|
|
}
|
|
}
|
|
goto bad;
|
|
}
|
|
/* OLD_STYLE_FSTAB */
|
|
while ((cp = strsep(&p, " \t\n")) != NULL && *cp == '\0')
|
|
;
|
|
_fs_fstab.fs_spec = cp;
|
|
if (!_fs_fstab.fs_spec || *_fs_fstab.fs_spec == '#')
|
|
continue;
|
|
while ((cp = strsep(&p, " \t\n")) != NULL && *cp == '\0')
|
|
;
|
|
_fs_fstab.fs_file = cp;
|
|
fixfsfile();
|
|
while ((cp = strsep(&p, " \t\n")) != NULL && *cp == '\0')
|
|
;
|
|
_fs_fstab.fs_vfstype = cp;
|
|
while ((cp = strsep(&p, " \t\n")) != NULL && *cp == '\0')
|
|
;
|
|
_fs_fstab.fs_mntops = cp;
|
|
if (_fs_fstab.fs_mntops == NULL)
|
|
goto bad;
|
|
_fs_fstab.fs_freq = 0;
|
|
_fs_fstab.fs_passno = 0;
|
|
while ((cp = strsep(&p, " \t\n")) != NULL && *cp == '\0')
|
|
;
|
|
if (cp != NULL) {
|
|
_fs_fstab.fs_freq = atoi(cp);
|
|
while ((cp = strsep(&p, " \t\n")) != NULL && *cp == '\0')
|
|
;
|
|
if (cp != NULL)
|
|
_fs_fstab.fs_passno = atoi(cp);
|
|
}
|
|
strcpy(subline, _fs_fstab.fs_mntops);
|
|
p = subline;
|
|
for (typexx = 0, cp = strsep(&p, ","); cp;
|
|
cp = strsep(&p, ",")) {
|
|
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);
|
|
|
|
bad: /* no way to distinguish between EOF and syntax error */
|
|
error(EFTYPE);
|
|
}
|
|
/* NOTREACHED */
|
|
}
|
|
|
|
struct fstab *
|
|
getfsent()
|
|
{
|
|
if ((!_fs_fp && !setfsent()) || !fstabscan())
|
|
return((struct fstab *)NULL);
|
|
return(&_fs_fstab);
|
|
}
|
|
|
|
struct fstab *
|
|
getfsspec(name)
|
|
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)
|
|
const char *name;
|
|
{
|
|
if (setfsent())
|
|
while (fstabscan())
|
|
if (!strcmp(_fs_fstab.fs_file, name))
|
|
return(&_fs_fstab);
|
|
return((struct fstab *)NULL);
|
|
}
|
|
|
|
int
|
|
setfsent()
|
|
{
|
|
if (_fs_fp) {
|
|
rewind(_fs_fp);
|
|
LineNo = 0;
|
|
return(1);
|
|
}
|
|
if (fsp_set == 0) {
|
|
if (issetugid())
|
|
setfstab(NULL);
|
|
else
|
|
setfstab(getenv("PATH_FSTAB"));
|
|
}
|
|
if ((_fs_fp = fopen(path_fstab, "r")) != NULL) {
|
|
LineNo = 0;
|
|
return(1);
|
|
}
|
|
error(errno);
|
|
return(0);
|
|
}
|
|
|
|
void
|
|
endfsent()
|
|
{
|
|
if (_fs_fp) {
|
|
(void)fclose(_fs_fp);
|
|
_fs_fp = NULL;
|
|
}
|
|
|
|
fsp_set = 0;
|
|
}
|
|
|
|
static void
|
|
error(err)
|
|
int err;
|
|
{
|
|
char *p;
|
|
char num[30];
|
|
|
|
(void)_write(STDERR_FILENO, "fstab: ", 7);
|
|
(void)_write(STDERR_FILENO, path_fstab, strlen(path_fstab));
|
|
(void)_write(STDERR_FILENO, ":", 1);
|
|
sprintf(num, "%d: ", LineNo);
|
|
(void)_write(STDERR_FILENO, num, strlen(num));
|
|
p = strerror(err);
|
|
(void)_write(STDERR_FILENO, p, strlen(p));
|
|
(void)_write(STDERR_FILENO, "\n", 1);
|
|
}
|