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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright (c) 1989, 2010, Oracle and/or its affiliates. All rights reserved.
*/
/* Copyright (c) 1988 AT&T */
/* All Rights Reserved */
#include "lint.h"
#include <mtlib.h>
#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/vfstab.h>
#include <string.h>
#include <thread.h>
#include <synch.h>
#include <strings.h>
#include <libc.h>
#include "tsd.h"
#define GETTOK_R(xx, ll, tmp)\
if ((vp->xx = (char *)strtok_r(ll, sepstr, tmp)) == NULL)\
return (VFS_TOOFEW);\
if (strcmp(vp->xx, dash) == 0)\
vp->xx = NULL
#define GETTOK(xx, ll)\
if ((vp->xx = strtok(ll, sepstr)) == NULL)\
return (VFS_TOOFEW);\
if (strcmp(vp->xx, dash) == 0)\
vp->xx = NULL
#define DIFF(xx)\
(vrefp->xx != NULL && (vgetp->xx == NULL ||\
strcmp(vrefp->xx, vgetp->xx) != 0))
#define SDIFF(xx, typem, typer)\
(vgetp->xx == NULL || stat64(vgetp->xx, &statb) == -1 ||\
(statb.st_mode & S_IFMT) != typem ||\
statb.st_rdev != typer)
static const char sepstr[] = " \t\n";
static const char dash[] = "-";
static int getaline(char *, FILE *);
int
getvfsspec(FILE *fd, struct vfstab *vgetp, char *special)
{
int ret, bstat;
mode_t bmode;
dev_t brdev;
struct stat64 statb;
if (special && stat64(special, &statb) == 0 &&
((bmode = (statb.st_mode & S_IFMT)) == S_IFBLK ||
bmode == S_IFCHR)) {
bstat = 1;
brdev = statb.st_rdev;
} else
bstat = 0;
while ((ret = getvfsent(fd, vgetp)) == 0 &&
((bstat == 0 &&
(special != NULL && (vgetp->vfs_special == NULL ||
strcmp(special, vgetp->vfs_special) != 0))) ||
(bstat == 1 &&
(vgetp->vfs_special == NULL ||
stat64(vgetp->vfs_special, &statb) == -1 ||
(statb.st_mode & S_IFMT) != bmode ||
statb.st_rdev != brdev))))
;
return (ret);
}
int
getvfsfile(FILE *fd, struct vfstab *vp, char *mountp)
{
struct vfstab vv;
bzero(&vv, (size_t)sizeof (vv));
vv.vfs_mountp = mountp;
return (getvfsany(fd, vp, &vv));
}
int
getvfsany(FILE *fd, struct vfstab *vgetp, struct vfstab *vrefp)
{
int ret, bstat, cstat;
mode_t bmode, cmode;
dev_t brdev, crdev;
struct stat64 statb;
off64_t start = ftello64(fd);
/* Match by straight strcmp */
while ((ret = getvfsent(fd, vgetp)) == 0 &&
(DIFF(vfs_special) || DIFF(vfs_fsckdev) ||
DIFF(vfs_mountp) ||
DIFF(vfs_fstype) ||
DIFF(vfs_fsckpass) ||
DIFF(vfs_automnt) ||
DIFF(vfs_mntopts)))
;
/* If something other than EOF, return it */
if (ret != -1)
return (ret);
/*
* Go back to the original location in the file and try to
* match the devices by doing stat's (retains compatibility
* with original getvfsany).
*/
(void) fseeko64(fd, start, SEEK_SET);
if (vrefp->vfs_special && stat64(vrefp->vfs_special, &statb) == 0 &&
((bmode = (statb.st_mode & S_IFMT)) == S_IFBLK ||
bmode == S_IFCHR)) {
bstat = 1;
brdev = statb.st_rdev;
} else
bstat = 0;
if (vrefp->vfs_fsckdev && stat64(vrefp->vfs_fsckdev, &statb) == 0 &&
((cmode = (statb.st_mode & S_IFMT)) == S_IFBLK ||
cmode == S_IFCHR)) {
cstat = 1;
crdev = statb.st_rdev;
} else
cstat = 0;
while ((ret = getvfsent(fd, vgetp)) == 0 &&
((bstat == 0 && DIFF(vfs_special)) ||
(bstat == 1 && SDIFF(vfs_special, bmode, brdev)) ||
(cstat == 0 && DIFF(vfs_fsckdev)) ||
(cstat == 1 && SDIFF(vfs_fsckdev, cmode, crdev)) ||
DIFF(vfs_mountp) ||
DIFF(vfs_fstype) ||
DIFF(vfs_fsckpass) ||
DIFF(vfs_automnt) ||
DIFF(vfs_mntopts)))
;
return (ret);
}
int
getvfsent(FILE *fd, struct vfstab *vp)
{
int ret;
char *tmp, *line;
line = tsdalloc(_T_GETVFSENT, VFS_LINE_MAX, NULL);
if (line == NULL)
return (0);
/* skip leading spaces and comments */
if ((ret = getaline(line, fd)) != 0)
return (ret);
/* split up each field */
GETTOK_R(vfs_special, line, &tmp);
GETTOK_R(vfs_fsckdev, NULL, &tmp);
GETTOK_R(vfs_mountp, NULL, &tmp);
GETTOK_R(vfs_fstype, NULL, &tmp);
GETTOK_R(vfs_fsckpass, NULL, &tmp);
GETTOK_R(vfs_automnt, NULL, &tmp);
GETTOK_R(vfs_mntopts, NULL, &tmp);
/* check for too many fields */
if (strtok_r(NULL, sepstr, &tmp) != NULL)
return (VFS_TOOMANY);
return (0);
}
static int
getaline(char *lp, FILE *fd)
{
char *cp;
while ((lp = fgets(lp, VFS_LINE_MAX, fd)) != NULL) {
if (strlen(lp) == VFS_LINE_MAX-1 && lp[VFS_LINE_MAX-2] != '\n')
return (VFS_TOOLONG);
for (cp = lp; *cp == ' ' || *cp == '\t'; cp++)
;
if (*cp != '#' && *cp != '\n')
return (0);
}
return (-1);
}
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