freebsd-dev/sbin/fsck/fsutil.c
Kirk McKusick c72372c693 Update fsck(8) to ignore failures from a check program for a filesystem
when the fstab(5) entry for the filesystem has the "failok" attribute.

Reviewed by:  kib
PR:           246201
MFC after:    2 weeks
Sponsored by: Netflix
Differential Revision: https://reviews.freebsd.org/D33424
2021-12-15 16:53:46 -08:00

269 lines
5.6 KiB
C

/* $NetBSD: fsutil.c,v 1.15 2006/06/05 16:52:05 christos Exp $ */
/*-
* SPDX-License-Identifier: BSD-3-Clause
*
* Copyright (c) 1990, 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. 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.
*/
#include <sys/cdefs.h>
#ifndef lint
__RCSID("$NetBSD: fsutil.c,v 1.15 2006/06/05 16:52:05 christos Exp $");
#endif /* not lint */
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/stat.h>
#include <sys/mount.h>
#include <err.h>
#include <fstab.h>
#include <paths.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "fsutil.h"
static const char *dev = NULL;
static int preen = 0;
static void vmsg(int, const char *, va_list) __printflike(2, 0);
/*
* The getfsopt() function checks whether an option is present in
* an fstab(5) fs_mntops entry. There are six possible cases:
*
* fs_mntops getfsopt result
* rw,foo foo true
* rw,nofoo nofoo true
* rw,nofoo foo false
* rw,foo nofoo false
* rw foo false
* rw nofoo false
*
* This function should be part of and documented in getfsent(3).
*/
int
getfsopt(struct fstab *fs, const char *option)
{
int negative, found;
char *opt, *optbuf;
if (option[0] == 'n' && option[1] == 'o') {
negative = 1;
option += 2;
} else
negative = 0;
optbuf = strdup(fs->fs_mntops);
found = 0;
for (opt = optbuf; (opt = strtok(opt, ",")) != NULL; opt = NULL) {
if (opt[0] == 'n' && opt[1] == 'o') {
if (!strcasecmp(opt + 2, option))
found = negative;
} else if (!strcasecmp(opt, option))
found = !negative;
}
free(optbuf);
return (found);
}
void
setcdevname(const char *cd, int pr)
{
dev = cd;
preen = pr;
}
const char *
cdevname(void)
{
return dev;
}
static void
vmsg(int fatal, const char *fmt, va_list ap)
{
if (!fatal && preen)
(void) printf("%s: ", dev);
(void) vprintf(fmt, ap);
if (fatal && preen)
(void) printf("\n");
if (fatal && preen) {
(void) printf(
"%s: UNEXPECTED INCONSISTENCY; RUN %s MANUALLY.\n",
dev, getprogname());
exit(8);
}
}
/*VARARGS*/
void
pfatal(const char *fmt, ...)
{
va_list ap;
va_start(ap, fmt);
vmsg(1, fmt, ap);
va_end(ap);
}
/*VARARGS*/
void
pwarn(const char *fmt, ...)
{
va_list ap;
va_start(ap, fmt);
vmsg(0, fmt, ap);
va_end(ap);
}
void
perr(const char *fmt, ...)
{
va_list ap;
va_start(ap, fmt);
vmsg(1, fmt, ap);
va_end(ap);
}
void
panic(const char *fmt, ...)
{
va_list ap;
va_start(ap, fmt);
vmsg(1, fmt, ap);
va_end(ap);
exit(8);
}
const char *
devcheck(const char *origname)
{
struct stat stslash, stchar;
if (stat("/", &stslash) < 0) {
perr("Can't stat `/'");
return (origname);
}
if (stat(origname, &stchar) < 0) {
perr("Can't stat %s\n", origname);
return (origname);
}
if (!S_ISCHR(stchar.st_mode)) {
perr("%s is not a char device\n", origname);
}
return (origname);
}
/*
* Get the mount point information for name.
*/
struct statfs *
getmntpt(const char *name)
{
struct stat devstat, mntdevstat;
char device[sizeof(_PATH_DEV) - 1 + MNAMELEN];
char *dev_name;
struct statfs *mntbuf, *statfsp;
int i, mntsize, isdev;
if (stat(name, &devstat) != 0)
return (NULL);
if (S_ISCHR(devstat.st_mode) || S_ISBLK(devstat.st_mode))
isdev = 1;
else
isdev = 0;
mntsize = getmntinfo(&mntbuf, MNT_NOWAIT);
for (i = 0; i < mntsize; i++) {
statfsp = &mntbuf[i];
dev_name = statfsp->f_mntfromname;
if (*dev_name != '/') {
if (strlen(_PATH_DEV) + strlen(dev_name) + 1 >
sizeof(statfsp->f_mntfromname))
continue;
strcpy(device, _PATH_DEV);
strcat(device, dev_name);
strcpy(statfsp->f_mntfromname, device);
}
if (isdev == 0) {
if (strcmp(name, statfsp->f_mntonname))
continue;
return (statfsp);
}
if (stat(dev_name, &mntdevstat) == 0 &&
mntdevstat.st_rdev == devstat.st_rdev)
return (statfsp);
}
statfsp = NULL;
return (statfsp);
}
void *
emalloc(size_t s)
{
void *p;
p = malloc(s);
if (p == NULL)
err(1, "malloc failed");
return (p);
}
void *
erealloc(void *p, size_t s)
{
void *q;
q = realloc(p, s);
if (q == NULL)
err(1, "realloc failed");
return (q);
}
char *
estrdup(const char *s)
{
char *p;
p = strdup(s);
if (p == NULL)
err(1, "strdup failed");
return (p);
}