FreeBSD-5.3/sbin/fsck/fsck.c
/* $NetBSD: fsck.c,v 1.21 1999/04/22 04:20:53 abs Exp $ */
/*
* Copyright (c) 1996 Christos Zoulas. All rights reserved.
* Copyright (c) 1980, 1989, 1993, 1994
* 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.
*
* From: @(#)mount.c 8.19 (Berkeley) 4/19/94
* From: $NetBSD: mount.c,v 1.24 1995/11/18 03:34:29 cgd Exp
* $NetBSD: fsck.c,v 1.21 1999/04/22 04:20:53 abs Exp $
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD: src/sbin/fsck/fsck.c,v 1.17 2003/10/29 16:09:17 trhodes Exp $");
#include <sys/param.h>
#include <sys/mount.h>
#include <sys/queue.h>
#include <sys/wait.h>
#define FSTYPENAMES
#include <sys/disklabel.h>
#include <sys/ioctl.h>
#include <ctype.h>
#include <err.h>
#include <errno.h>
#include <fstab.h>
#include <fcntl.h>
#include <paths.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "fsutil.h"
static enum { IN_LIST, NOT_IN_LIST } which = NOT_IN_LIST;
TAILQ_HEAD(fstypelist, entry) opthead, selhead;
struct entry {
char *type;
char *options;
TAILQ_ENTRY(entry) entries;
};
static char *options = NULL;
static int flags = 0;
static int forceflag = 0;
static int checkfs(const char *, const char *, const char *, char *, pid_t *);
static int selected(const char *);
static void addoption(char *);
static const char *getoptions(const char *);
static void addentry(struct fstypelist *, const char *, const char *);
static void maketypelist(char *);
static void catopt(char **, const char *);
static void mangle(char *, int *, const char ***, int *);
static const char *getfslab(const char *);
static void usage(void) __dead2;
static int isok(struct fstab *);
int
main(int argc, char *argv[])
{
struct fstab *fs;
int i, rval = 0;
const char *vfstype = NULL;
char globopt[3];
globopt[0] = '-';
globopt[2] = '\0';
TAILQ_INIT(&selhead);
TAILQ_INIT(&opthead);
while ((i = getopt(argc, argv, "BdvpfFnyl:t:T:")) != -1)
switch (i) {
case 'B':
if (flags & CHECK_BACKGRD)
errx(1, "Cannot specify -B and -F.");
flags |= DO_BACKGRD;
break;
case 'd':
flags |= CHECK_DEBUG;
break;
case 'v':
flags |= CHECK_VERBOSE;
break;
case 'F':
if (flags & DO_BACKGRD)
errx(1, "Cannot specify -B and -F.");
flags |= CHECK_BACKGRD;
break;
case 'p':
flags |= CHECK_PREEN;
/*FALLTHROUGH*/
case 'n':
case 'y':
globopt[1] = i;
catopt(&options, globopt);
break;
case 'f':
forceflag = 1;
globopt[1] = i;
catopt(&options, globopt);
break;
case 'l':
warnx("Ignoring obsolete -l option\n");
break;
case 'T':
if (*optarg)
addoption(optarg);
break;
case 't':
if (!TAILQ_EMPTY(&selhead))
errx(1, "only one -t option may be specified.");
maketypelist(optarg);
vfstype = optarg;
break;
case '?':
default:
usage();
/* NOTREACHED */
}
argc -= optind;
argv += optind;
if (argc == 0)
return checkfstab(flags, isok, checkfs);
#define BADTYPE(type) \
(strcmp(type, FSTAB_RO) && \
strcmp(type, FSTAB_RW) && strcmp(type, FSTAB_RQ))
for (; argc--; argv++) {
const char *spec, *mntpt, *type, *cp;
char device[MAXPATHLEN];
struct statfs *mntp;
spec = *argv;
cp = strrchr(spec, '/');
if (cp == 0) {
(void)snprintf(device, sizeof(device), "%s%s",
_PATH_DEV, spec);
spec = device;
}
mntp = getmntpt(spec);
if (mntp != NULL) {
spec = mntp->f_mntfromname;
mntpt = mntp->f_mntonname;
}
if ((fs = getfsfile(spec)) == NULL &&
(fs = getfsspec(spec)) == NULL) {
if (vfstype == NULL)
vfstype = getfslab(spec);
if (vfstype == NULL)
errx(1, "Could not determine filesystem type");
type = vfstype;
devcheck(spec);
} else {
spec = fs->fs_spec;
type = fs->fs_vfstype;
mntpt = fs->fs_file;
if (BADTYPE(fs->fs_type))
errx(1, "%s has unknown file system type.",
spec);
}
if ((flags & CHECK_BACKGRD) &&
checkfs(type, spec, mntpt, "-F", NULL) == 0) {
printf("%s: DEFER FOR BACKGROUND CHECKING\n", *argv);
continue;
}
if ((flags & DO_BACKGRD) && forceflag == 0 &&
checkfs(type, spec, mntpt, "-F", NULL) != 0)
continue;
rval |= checkfs(type, spec, mntpt, NULL, NULL);
}
return rval;
}
static int
isok(struct fstab *fs)
{
int i;
if (fs->fs_passno == 0)
return (0);
if (BADTYPE(fs->fs_type))
return (0);
if (!selected(fs->fs_vfstype))
return (0);
/*
* If the -B flag has been given, then process the needed
* background checks. Background checks cannot be run on
* file systems that will be mounted read-only or that were
* not mounted at boot time (typically those marked `noauto').
* If these basic tests are passed, check with the file system
* itself to see if it is willing to do background checking
* by invoking its check program with the -F flag.
*/
if (flags & DO_BACKGRD) {
if (!strcmp(fs->fs_type, FSTAB_RO))
return (0);
if (getmntpt(fs->fs_spec) == NULL)
return (0);
if (checkfs(fs->fs_vfstype, fs->fs_spec, fs->fs_file, "-F", 0))
return (0);
return (1);
}
/*
* If the -F flag has been given, then consider deferring the
* check to background. Background checks cannot be run on
* file systems that will be mounted read-only or that will
* not be mounted at boot time (e.g., marked `noauto'). If
* these basic tests are passed, check with the file system
* itself to see if it is willing to defer to background
* checking by invoking its check program with the -F flag.
*/
if ((flags & CHECK_BACKGRD) == 0 || !strcmp(fs->fs_type, FSTAB_RO))
return (1);
for (i = strlen(fs->fs_mntops) - 6; i >= 0; i--)
if (!strncmp(&fs->fs_mntops[i], "noauto", 6))
break;
if (i >= 0)
return (1);
if (checkfs(fs->fs_vfstype, fs->fs_spec, fs->fs_file, "-F", NULL) != 0)
return (1);
printf("%s: DEFER FOR BACKGROUND CHECKING\n", fs->fs_spec);
return (0);
}
static int
checkfs(const char *pvfstype, const char *spec, const char *mntpt,
char *auxopt, pid_t *pidp)
{
const char **argv;
pid_t pid;
int argc, i, status, maxargc;
char *optbuf, execbase[MAXPATHLEN];
char *vfstype = NULL;
const char *extra = NULL;
#ifdef __GNUC__
/* Avoid vfork clobbering */
(void) &optbuf;
(void) &vfstype;
#endif
/*
* We convert the vfstype to lowercase and any spaces to underscores
* to not confuse the issue
*
* XXX This is a kludge to make automatic filesystem type guessing
* from the disklabel work for "4.2BSD" filesystems. It does a
* very limited subset of transliteration to a normalised form of
* filesystem name, and we do not seem to enforce a filesystem
* name character set.
*/
vfstype = strdup(pvfstype);
if (vfstype == NULL)
perror("strdup(pvfstype)");
for (i = 0; i < strlen(vfstype); i++) {
vfstype[i] = tolower(vfstype[i]);
if (vfstype[i] == ' ')
vfstype[i] = '_';
}
extra = getoptions(vfstype);
optbuf = NULL;
if (options)
catopt(&optbuf, options);
if (extra)
catopt(&optbuf, extra);
if (auxopt)
catopt(&optbuf, auxopt);
else if (flags & DO_BACKGRD)
catopt(&optbuf, "-B");
maxargc = 64;
argv = emalloc(sizeof(char *) * maxargc);
(void) snprintf(execbase, sizeof(execbase), "fsck_%s", vfstype);
argc = 0;
argv[argc++] = execbase;
if (optbuf)
mangle(optbuf, &argc, &argv, &maxargc);
argv[argc++] = spec;
argv[argc] = NULL;
if (flags & (CHECK_DEBUG|CHECK_VERBOSE)) {
(void)printf("start %s %swait", mntpt,
pidp ? "no" : "");
for (i = 0; i < argc; i++)
(void)printf(" %s", argv[i]);
(void)printf("\n");
}
switch (pid = vfork()) {
case -1: /* Error. */
warn("vfork");
if (optbuf)
free(optbuf);
free(vfstype);
return (1);
case 0: /* Child. */
if ((flags & CHECK_DEBUG) && auxopt == NULL)
_exit(0);
/* Go find an executable. */
execvP(execbase, _PATH_SYSPATH, (char * const *)argv);
if (spec)
warn("exec %s for %s in %s", execbase, spec, _PATH_SYSPATH);
else
warn("exec %s in %s", execbase, _PATH_SYSPATH);
_exit(1);
/* NOTREACHED */
default: /* Parent. */
if (optbuf)
free(optbuf);
free(vfstype);
if (pidp) {
*pidp = pid;
return 0;
}
if (waitpid(pid, &status, 0) < 0) {
warn("waitpid");
return (1);
}
if (WIFEXITED(status)) {
if (WEXITSTATUS(status) != 0)
return (WEXITSTATUS(status));
}
else if (WIFSIGNALED(status)) {
warnx("%s: %s", spec, strsignal(WTERMSIG(status)));
return (1);
}
break;
}
return (0);
}
static int
selected(const char *type)
{
struct entry *e;
/* If no type specified, it's always selected. */
TAILQ_FOREACH(e, &selhead, entries)
if (!strncmp(e->type, type, MFSNAMELEN))
return which == IN_LIST ? 1 : 0;
return which == IN_LIST ? 0 : 1;
}
static const char *
getoptions(const char *type)
{
struct entry *e;
TAILQ_FOREACH(e, &opthead, entries)
if (!strncmp(e->type, type, MFSNAMELEN))
return e->options;
return "";
}
static void
addoption(char *optstr)
{
char *newoptions;
struct entry *e;
if ((newoptions = strchr(optstr, ':')) == NULL)
errx(1, "Invalid option string");
*newoptions++ = '\0';
TAILQ_FOREACH(e, &opthead, entries)
if (!strncmp(e->type, optstr, MFSNAMELEN)) {
catopt(&e->options, newoptions);
return;
}
addentry(&opthead, optstr, newoptions);
}
static void
addentry(struct fstypelist *list, const char *type, const char *opts)
{
struct entry *e;
e = emalloc(sizeof(struct entry));
e->type = estrdup(type);
e->options = estrdup(opts);
TAILQ_INSERT_TAIL(list, e, entries);
}
static void
maketypelist(char *fslist)
{
char *ptr;
if ((fslist == NULL) || (fslist[0] == '\0'))
errx(1, "empty type list");
if (fslist[0] == 'n' && fslist[1] == 'o') {
fslist += 2;
which = NOT_IN_LIST;
}
else
which = IN_LIST;
while ((ptr = strsep(&fslist, ",")) != NULL)
addentry(&selhead, ptr, "");
}
static void
catopt(char **sp, const char *o)
{
char *s;
size_t i, j;
s = *sp;
if (s) {
i = strlen(s);
j = i + 1 + strlen(o) + 1;
s = erealloc(s, j);
(void)snprintf(s + i, j, ",%s", o);
} else
s = estrdup(o);
*sp = s;
}
static void
mangle(char *options, int *argcp, const char ***argvp, int *maxargcp)
{
char *p, *s;
int argc, maxargc;
const char **argv;
argc = *argcp;
argv = *argvp;
maxargc = *maxargcp;
for (s = options; (p = strsep(&s, ",")) != NULL;) {
/* Always leave space for one more argument and the NULL. */
if (argc >= maxargc - 3) {
maxargc <<= 1;
argv = erealloc(argv, maxargc * sizeof(char *));
}
if (*p != '\0') {
if (*p == '-') {
argv[argc++] = p;
p = strchr(p, '=');
if (p) {
*p = '\0';
argv[argc++] = p+1;
}
} else {
argv[argc++] = "-o";
argv[argc++] = p;
}
}
}
*argcp = argc;
*argvp = argv;
*maxargcp = maxargc;
}
const static char *
getfslab(const char *str)
{
struct disklabel dl;
int fd;
char p;
const char *vfstype;
u_char t;
/* deduce the file system type from the disk label */
if ((fd = open(str, O_RDONLY)) == -1)
err(1, "cannot open `%s'", str);
if (ioctl(fd, DIOCGDINFO, &dl) == -1)
return(NULL);
(void) close(fd);
p = str[strlen(str) - 1];
if ((p - 'a') >= dl.d_npartitions)
errx(1, "partition `%s' is not defined on disk", str);
if ((t = dl.d_partitions[p - 'a'].p_fstype) >= FSMAXTYPES)
errx(1, "partition `%s' is not of a legal vfstype",
str);
if ((vfstype = fstypenames[t]) == NULL)
errx(1, "vfstype `%s' on partition `%s' is not supported",
fstypenames[t], str);
return vfstype;
}
static void
usage(void)
{
static const char common[] =
"[-BFdfnpvy] [-T fstype:fsoptions] [-t fstype]";
(void)fprintf(stderr, "usage: %s %s [special|node]...\n",
getprogname(), common);
exit(1);
}