minix/sbin/fsck/fsck.c
2011-12-22 23:07:23 +01:00

613 lines
13 KiB
C

/* $NetBSD: fsck.c,v 1.49 2010/02/24 13:56:07 hannken 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. 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
*
*/
#include <sys/cdefs.h>
#ifndef lint
__RCSID("$NetBSD: fsck.c,v 1.49 2010/02/24 13:56:07 hannken Exp $");
#endif /* not lint */
#include <sys/param.h>
#include <sys/mount.h>
#include <sys/queue.h>
#include <sys/wait.h>
#define FSTYPENAMES
#define FSCKNAMES
#include <sys/disk.h>
#include <sys/disklabel.h>
#include <sys/ioctl.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 <util.h>
#include "pathnames.h"
#include "fsutil.h"
#include "exitvalues.h"
static enum { IN_LIST, NOT_IN_LIST } which = NOT_IN_LIST;
TAILQ_HEAD(fstypelist, entry) opthead, selhead, omhead;
struct entry {
char *type;
char *options;
TAILQ_ENTRY(entry) entries;
};
static int maxrun = 0;
static char *options = NULL;
static int flags = 0;
static int checkfs(const char *, const char *, const char *, void *, pid_t *);
static int selected(const char *);
static int omitted(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 ** volatile *, int *);
static const char *getfslab(const char *);
static void usage(void);
static void *isok(struct fstab *);
int
main(int argc, char *argv[])
{
struct fstab *fs;
int i, rval;
const char *vfstype = NULL;
char globopt[3];
int ret = FSCK_EXIT_OK;
globopt[0] = '-';
globopt[2] = '\0';
TAILQ_INIT(&selhead);
TAILQ_INIT(&opthead);
TAILQ_INIT(&omhead);
while ((i = getopt(argc, argv, "dfl:nPpqT:t:vx:y")) != -1) {
switch (i) {
case 'd':
flags |= CHECK_DEBUG;
continue;
case 'f':
flags |= CHECK_FORCE;
break;
case 'n':
flags |= CHECK_NOFIX;
break;
case 'p':
flags |= CHECK_PREEN;
break;
case 'P':
flags |= CHECK_PROGRESS;
break;
case 'q':
break;
case 'l':
maxrun = atoi(optarg);
continue;
case 'T':
if (*optarg)
addoption(optarg);
continue;
case 't':
if (TAILQ_FIRST(&selhead) != NULL)
errx(1, "only one -t option may be specified.");
maketypelist(optarg);
vfstype = optarg;
continue;
case 'v':
flags |= CHECK_VERBOSE;
continue;
case 'x':
addentry(&omhead, optarg, "");
continue;
case 'y':
break;
case '?':
default:
usage();
/* NOTREACHED */
}
/* Pass option to fsck_xxxfs */
globopt[1] = i;
catopt(&options, globopt);
}
/* Don't do progress meters if we're debugging. */
if (flags & CHECK_DEBUG)
flags &= ~CHECK_PROGRESS;
/*
* If progress meters are being used, force max parallel to 1
* so the progress meter outputs don't interfere with one another.
*/
if (flags & CHECK_PROGRESS)
maxrun = 1;
#ifdef __minix
/* parallel checking heuristic doesn't work for minix currently */
maxrun = 1;
#endif
argc -= optind;
argv += optind;
if (argc == 0)
return checkfstab(flags, maxrun, isok, checkfs);
#define BADTYPE(type) \
(strcmp(type, FSTAB_RO) && \
strcmp(type, FSTAB_RW) && strcmp(type, FSTAB_RQ))
for (; argc--; argv++) {
const char *spec, *type, *cp;
char device[MAXPATHLEN];
spec = *argv;
cp = strrchr(spec, '/');
if (cp == 0) {
(void)snprintf(device, sizeof(device), "%s%s",
_PATH_DEV, spec);
spec = device;
}
if ((fs = getfsfile(spec)) == NULL &&
(fs = getfsspec(spec)) == NULL) {
if (vfstype == NULL)
vfstype = getfslab(spec);
type = vfstype;
}
else {
spec = fs->fs_spec;
type = fs->fs_vfstype;
if (BADTYPE(fs->fs_type))
errx(FSCK_EXIT_CHECK_FAILED,
"%s has unknown file system type.",
spec);
}
rval = checkfs(type, blockcheck(spec), *argv, NULL, NULL);
if (rval > ret)
ret = rval;
}
return ret;
}
static void *
isok(struct fstab *fs)
{
if (fs->fs_passno == 0)
return NULL;
if (BADTYPE(fs->fs_type))
return NULL;
if (!selected(fs->fs_vfstype))
return NULL;
if (omitted(fs->fs_file))
return NULL;
return fs;
}
static int
checkfs(const char *vfst, const char *spec, const char *mntpt, void *auxarg,
pid_t *pidp)
{
/* List of directories containing fsck_xxx subcommands. */
static const char *edirs[] = {
#ifdef RESCUEDIR
RESCUEDIR,
#endif
_PATH_SBIN,
_PATH_USRSBIN,
#ifdef __minix
"/usr/pkg/sbin/",
#endif
NULL
};
const char ** volatile argv, **edir;
const char * volatile vfstype = vfst;
pid_t pid;
int argc, i, status, maxargc;
char *optb;
char *volatile optbuf;
char execname[MAXPATHLEN + 1], execbase1[MAXPATHLEN], execbase2[MAXPATHLEN];
const char *extra = getoptions(vfstype);
if (!strcmp(vfstype, "ufs"))
vfstype = MOUNT_UFS;
optb = NULL;
if (options)
catopt(&optb, options);
if (extra)
catopt(&optb, extra);
optbuf = optb;
maxargc = 64;
argv = emalloc(sizeof(char *) * maxargc);
(void) snprintf(execbase1, sizeof(execbase1), "fsck_%s", vfstype);
(void) snprintf(execbase2, sizeof(execbase2), "fsck.%s", vfstype);
argc = 0;
argv[argc++] = execbase1;
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(argv);
return FSCK_EXIT_CHECK_FAILED;
case 0: /* Child. */
#ifndef __minix
if ((flags & CHECK_FORCE) == 0) {
struct statvfs sfs;
/*
* if mntpt is a mountpoint of a mounted file
* system and it's mounted read-write, skip it
* unless -f is given.
*/
if ((statvfs(mntpt, &sfs) == 0) &&
(strcmp(mntpt, sfs.f_mntonname) == 0) &&
((sfs.f_flag & MNT_RDONLY) == 0)) {
printf(
"%s: file system is mounted read-write on %s; not checking\n",
spec, mntpt);
if ((flags & CHECK_PREEN) && auxarg != NULL)
_exit(FSCK_EXIT_OK); /* fsck -p */
else
_exit(FSCK_EXIT_CHECK_FAILED); /* fsck [[-p] ...] */
}
}
#endif
if (flags & CHECK_DEBUG)
_exit(FSCK_EXIT_OK);
/* Go find an executable. */
edir = edirs;
do {
(void)snprintf(execname,
sizeof(execname), "%s/%s", *edir, execbase1);
execv(execname, (char * const *)__UNCONST(argv));
if (errno != ENOENT) {
if (spec)
warn("exec %s for %s", execname, spec);
else
warn("exec %s", execname);
}
(void)snprintf(execname,
sizeof(execname), "%s/%s", *edir, execbase2);
execv(execname, (char * const *)__UNCONST(argv));
if (errno != ENOENT) {
if (spec)
warn("exec %s for %s", execname, spec);
else
warn("exec %s", execname);
}
} while (*++edir != NULL);
if (errno == ENOENT) {
if (spec)
warn("exec %s for %s", execname, spec);
else
warn("exec %s", execname);
}
_exit(FSCK_EXIT_CHECK_FAILED);
/* NOTREACHED */
default: /* Parent. */
if (optbuf)
free(optbuf);
free(argv);
if (pidp) {
*pidp = pid;
return FSCK_EXIT_OK;
}
if (waitpid(pid, &status, 0) < 0) {
warn("waitpid");
return FSCK_EXIT_CHECK_FAILED;
}
if (WIFEXITED(status)) {
if (WEXITSTATUS(status) != 0)
return WEXITSTATUS(status);
}
else if (WIFSIGNALED(status)) {
warnx("%s: %s", spec, strsignal(WTERMSIG(status)));
return FSCK_EXIT_CHECK_FAILED;
}
break;
}
return FSCK_EXIT_OK;
}
static int
selected(const char *type)
{
struct entry *e;
/* If no type specified, it's always selected. */
TAILQ_FOREACH(e, &selhead, entries)
if (!strcmp(e->type, type))
return which == IN_LIST ? 1 : 0;
return which == IN_LIST ? 0 : 1;
}
static int
omitted(const char *mountedon)
{
struct entry *e;
/* If no type specified, it's always selected. */
TAILQ_FOREACH(e, &omhead, entries)
if (!strcmp(e->type, mountedon))
return 1;
return 0;
}
static const char *
getoptions(const char *type)
{
struct entry *e;
TAILQ_FOREACH(e, &opthead, entries)
if (!strcmp(e->type, type))
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 (!strcmp(e->type, optstr)) {
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 *opts, int *argcp, const char ** volatile *argvp, int *maxargcp)
{
char *p, *s;
int argc, maxargc;
const char **argv;
argc = *argcp;
argv = *argvp;
maxargc = *maxargcp;
for (s = opts; (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;
}
static const char *
getfslab(const char *str)
{
#ifdef __minix
errx(1, "cannot determine vfstype under minix");
#else
static struct dkwedge_info dkw;
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);
/* First check to see if it's a wedge. */
if (ioctl(fd, DIOCGWEDGEINFO, &dkw) == 0) {
/* Yup, this is easy. */
(void) close(fd);
return (dkw.dkw_ptype);
}
if (ioctl(fd, DIOCGDINFO, &dl) == -1)
err(1, "cannot get disklabel for `%s'", str);
(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 = fscknames[t]) == NULL)
errx(1, "vfstype `%s' on partition `%s' is not supported",
fstypenames[t], str);
return vfstype;
#endif
}
static void
usage(void)
{
static const char common[] =
"[-dfnPpqvy] [-x excludemount] [-l maxparallel] [-T fstype:fsoptions]\n\t\t[-t fstype]";
(void)fprintf(stderr, "usage: %s %s [special|node]...\n",
getprogname(), common);
exit(FSCK_EXIT_USAGE);
}