613 lines
13 KiB
C
613 lines
13 KiB
C
/* $NetBSD: fsck.c,v 1.49 2010/02/24 13:56:07 hannken Exp $ */
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/*
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* Copyright (c) 1996 Christos Zoulas. All rights reserved.
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* Copyright (c) 1980, 1989, 1993, 1994
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* From: @(#)mount.c 8.19 (Berkeley) 4/19/94
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* From: NetBSD: mount.c,v 1.24 1995/11/18 03:34:29 cgd Exp
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*
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*/
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#include <sys/cdefs.h>
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#ifndef lint
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__RCSID("$NetBSD: fsck.c,v 1.49 2010/02/24 13:56:07 hannken Exp $");
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#endif /* not lint */
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#include <sys/param.h>
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#include <sys/mount.h>
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#include <sys/queue.h>
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#include <sys/wait.h>
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#define FSTYPENAMES
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#define FSCKNAMES
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#include <sys/disk.h>
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#include <sys/disklabel.h>
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#include <sys/ioctl.h>
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#include <err.h>
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#include <errno.h>
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#include <fstab.h>
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#include <fcntl.h>
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#include <paths.h>
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#include <signal.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <util.h>
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#include "pathnames.h"
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#include "fsutil.h"
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#include "exitvalues.h"
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static enum { IN_LIST, NOT_IN_LIST } which = NOT_IN_LIST;
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TAILQ_HEAD(fstypelist, entry) opthead, selhead, omhead;
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struct entry {
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char *type;
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char *options;
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TAILQ_ENTRY(entry) entries;
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};
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static int maxrun = 0;
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static char *options = NULL;
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static int flags = 0;
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static int checkfs(const char *, const char *, const char *, void *, pid_t *);
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static int selected(const char *);
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static int omitted(const char *);
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static void addoption(char *);
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static const char *getoptions(const char *);
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static void addentry(struct fstypelist *, const char *, const char *);
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static void maketypelist(char *);
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static void catopt(char **, const char *);
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static void mangle(char *, int *, const char ** volatile *, int *);
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static const char *getfslab(const char *);
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static void usage(void);
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static void *isok(struct fstab *);
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int
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main(int argc, char *argv[])
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{
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struct fstab *fs;
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int i, rval;
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const char *vfstype = NULL;
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char globopt[3];
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int ret = FSCK_EXIT_OK;
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globopt[0] = '-';
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globopt[2] = '\0';
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TAILQ_INIT(&selhead);
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TAILQ_INIT(&opthead);
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TAILQ_INIT(&omhead);
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while ((i = getopt(argc, argv, "dfl:nPpqT:t:vx:y")) != -1) {
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switch (i) {
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case 'd':
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flags |= CHECK_DEBUG;
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continue;
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case 'f':
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flags |= CHECK_FORCE;
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break;
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case 'n':
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flags |= CHECK_NOFIX;
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break;
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case 'p':
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flags |= CHECK_PREEN;
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break;
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case 'P':
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flags |= CHECK_PROGRESS;
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break;
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case 'q':
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break;
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case 'l':
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maxrun = atoi(optarg);
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continue;
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case 'T':
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if (*optarg)
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addoption(optarg);
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continue;
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case 't':
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if (TAILQ_FIRST(&selhead) != NULL)
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errx(1, "only one -t option may be specified.");
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maketypelist(optarg);
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vfstype = optarg;
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continue;
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case 'v':
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flags |= CHECK_VERBOSE;
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continue;
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case 'x':
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addentry(&omhead, optarg, "");
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continue;
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case 'y':
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break;
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case '?':
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default:
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usage();
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/* NOTREACHED */
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}
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/* Pass option to fsck_xxxfs */
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globopt[1] = i;
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catopt(&options, globopt);
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}
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/* Don't do progress meters if we're debugging. */
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if (flags & CHECK_DEBUG)
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flags &= ~CHECK_PROGRESS;
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/*
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* If progress meters are being used, force max parallel to 1
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* so the progress meter outputs don't interfere with one another.
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*/
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if (flags & CHECK_PROGRESS)
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maxrun = 1;
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#ifdef __minix
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/* parallel checking heuristic doesn't work for minix currently */
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maxrun = 1;
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#endif
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argc -= optind;
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argv += optind;
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if (argc == 0)
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return checkfstab(flags, maxrun, isok, checkfs);
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#define BADTYPE(type) \
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(strcmp(type, FSTAB_RO) && \
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strcmp(type, FSTAB_RW) && strcmp(type, FSTAB_RQ))
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for (; argc--; argv++) {
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const char *spec, *type, *cp;
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char device[MAXPATHLEN];
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spec = *argv;
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cp = strrchr(spec, '/');
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if (cp == 0) {
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(void)snprintf(device, sizeof(device), "%s%s",
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_PATH_DEV, spec);
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spec = device;
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}
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if ((fs = getfsfile(spec)) == NULL &&
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(fs = getfsspec(spec)) == NULL) {
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if (vfstype == NULL)
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vfstype = getfslab(spec);
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type = vfstype;
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}
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else {
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spec = fs->fs_spec;
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type = fs->fs_vfstype;
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if (BADTYPE(fs->fs_type))
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errx(FSCK_EXIT_CHECK_FAILED,
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"%s has unknown file system type.",
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spec);
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}
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rval = checkfs(type, blockcheck(spec), *argv, NULL, NULL);
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if (rval > ret)
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ret = rval;
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}
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return ret;
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}
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static void *
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isok(struct fstab *fs)
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{
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if (fs->fs_passno == 0)
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return NULL;
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if (BADTYPE(fs->fs_type))
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return NULL;
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if (!selected(fs->fs_vfstype))
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return NULL;
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if (omitted(fs->fs_file))
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return NULL;
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return fs;
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}
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static int
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checkfs(const char *vfst, const char *spec, const char *mntpt, void *auxarg,
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pid_t *pidp)
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{
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/* List of directories containing fsck_xxx subcommands. */
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static const char *edirs[] = {
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#ifdef RESCUEDIR
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RESCUEDIR,
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#endif
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_PATH_SBIN,
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_PATH_USRSBIN,
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#ifdef __minix
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"/usr/pkg/sbin/",
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#endif
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NULL
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};
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const char ** volatile argv, **edir;
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const char * volatile vfstype = vfst;
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pid_t pid;
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int argc, i, status, maxargc;
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char *optb;
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char *volatile optbuf;
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char execname[MAXPATHLEN + 1], execbase1[MAXPATHLEN], execbase2[MAXPATHLEN];
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const char *extra = getoptions(vfstype);
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if (!strcmp(vfstype, "ufs"))
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vfstype = MOUNT_UFS;
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optb = NULL;
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if (options)
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catopt(&optb, options);
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if (extra)
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catopt(&optb, extra);
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optbuf = optb;
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maxargc = 64;
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argv = emalloc(sizeof(char *) * maxargc);
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(void) snprintf(execbase1, sizeof(execbase1), "fsck_%s", vfstype);
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(void) snprintf(execbase2, sizeof(execbase2), "fsck.%s", vfstype);
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argc = 0;
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argv[argc++] = execbase1;
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if (optbuf)
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mangle(optbuf, &argc, &argv, &maxargc);
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argv[argc++] = spec;
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argv[argc] = NULL;
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if (flags & (CHECK_DEBUG|CHECK_VERBOSE)) {
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(void)printf("start %s %swait", mntpt,
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pidp ? "no" : "");
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for (i = 0; i < argc; i++)
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(void)printf(" %s", argv[i]);
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(void)printf("\n");
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}
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switch (pid = vfork()) {
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case -1: /* Error. */
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warn("vfork");
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if (optbuf)
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free(optbuf);
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free(argv);
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return FSCK_EXIT_CHECK_FAILED;
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case 0: /* Child. */
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#ifndef __minix
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if ((flags & CHECK_FORCE) == 0) {
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struct statvfs sfs;
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/*
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* if mntpt is a mountpoint of a mounted file
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* system and it's mounted read-write, skip it
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* unless -f is given.
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*/
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if ((statvfs(mntpt, &sfs) == 0) &&
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(strcmp(mntpt, sfs.f_mntonname) == 0) &&
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((sfs.f_flag & MNT_RDONLY) == 0)) {
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printf(
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"%s: file system is mounted read-write on %s; not checking\n",
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spec, mntpt);
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if ((flags & CHECK_PREEN) && auxarg != NULL)
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_exit(FSCK_EXIT_OK); /* fsck -p */
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else
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_exit(FSCK_EXIT_CHECK_FAILED); /* fsck [[-p] ...] */
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}
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}
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#endif
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if (flags & CHECK_DEBUG)
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_exit(FSCK_EXIT_OK);
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/* Go find an executable. */
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edir = edirs;
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do {
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(void)snprintf(execname,
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sizeof(execname), "%s/%s", *edir, execbase1);
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execv(execname, (char * const *)__UNCONST(argv));
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if (errno != ENOENT) {
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if (spec)
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warn("exec %s for %s", execname, spec);
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else
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warn("exec %s", execname);
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}
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(void)snprintf(execname,
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sizeof(execname), "%s/%s", *edir, execbase2);
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execv(execname, (char * const *)__UNCONST(argv));
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if (errno != ENOENT) {
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if (spec)
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warn("exec %s for %s", execname, spec);
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else
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warn("exec %s", execname);
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}
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} while (*++edir != NULL);
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if (errno == ENOENT) {
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if (spec)
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warn("exec %s for %s", execname, spec);
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else
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warn("exec %s", execname);
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}
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_exit(FSCK_EXIT_CHECK_FAILED);
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/* NOTREACHED */
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default: /* Parent. */
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if (optbuf)
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free(optbuf);
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free(argv);
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if (pidp) {
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*pidp = pid;
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return FSCK_EXIT_OK;
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}
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if (waitpid(pid, &status, 0) < 0) {
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warn("waitpid");
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return FSCK_EXIT_CHECK_FAILED;
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}
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if (WIFEXITED(status)) {
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if (WEXITSTATUS(status) != 0)
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return WEXITSTATUS(status);
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}
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else if (WIFSIGNALED(status)) {
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warnx("%s: %s", spec, strsignal(WTERMSIG(status)));
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return FSCK_EXIT_CHECK_FAILED;
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}
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break;
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}
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return FSCK_EXIT_OK;
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}
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static int
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selected(const char *type)
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{
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struct entry *e;
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/* If no type specified, it's always selected. */
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TAILQ_FOREACH(e, &selhead, entries)
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if (!strcmp(e->type, type))
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return which == IN_LIST ? 1 : 0;
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return which == IN_LIST ? 0 : 1;
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}
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static int
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omitted(const char *mountedon)
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{
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struct entry *e;
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/* If no type specified, it's always selected. */
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TAILQ_FOREACH(e, &omhead, entries)
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if (!strcmp(e->type, mountedon))
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return 1;
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return 0;
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}
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static const char *
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getoptions(const char *type)
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{
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struct entry *e;
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TAILQ_FOREACH(e, &opthead, entries)
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if (!strcmp(e->type, type))
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return e->options;
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return "";
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}
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static void
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addoption(char *optstr)
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{
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char *newoptions;
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struct entry *e;
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if ((newoptions = strchr(optstr, ':')) == NULL)
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errx(1, "Invalid option string");
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*newoptions++ = '\0';
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TAILQ_FOREACH(e, &opthead, entries)
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if (!strcmp(e->type, optstr)) {
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catopt(&e->options, newoptions);
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return;
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}
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addentry(&opthead, optstr, newoptions);
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}
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static void
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addentry(struct fstypelist *list, const char *type, const char *opts)
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{
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struct entry *e;
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e = emalloc(sizeof(struct entry));
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e->type = estrdup(type);
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e->options = estrdup(opts);
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TAILQ_INSERT_TAIL(list, e, entries);
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}
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static void
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maketypelist(char *fslist)
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{
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char *ptr;
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if ((fslist == NULL) || (fslist[0] == '\0'))
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errx(1, "empty type list");
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if (fslist[0] == 'n' && fslist[1] == 'o') {
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fslist += 2;
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which = NOT_IN_LIST;
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}
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else
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which = IN_LIST;
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while ((ptr = strsep(&fslist, ",")) != NULL)
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addentry(&selhead, ptr, "");
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}
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static void
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catopt(char **sp, const char *o)
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{
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char *s;
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size_t i, j;
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s = *sp;
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if (s) {
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i = strlen(s);
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j = i + 1 + strlen(o) + 1;
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s = erealloc(s, j);
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(void)snprintf(s + i, j, ",%s", o);
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} else
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s = estrdup(o);
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*sp = s;
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}
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static void
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mangle(char *opts, int *argcp, const char ** volatile *argvp, int *maxargcp)
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{
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char *p, *s;
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int argc, maxargc;
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const char **argv;
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argc = *argcp;
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argv = *argvp;
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maxargc = *maxargcp;
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for (s = opts; (p = strsep(&s, ",")) != NULL;) {
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/* Always leave space for one more argument and the NULL. */
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if (argc >= maxargc - 3) {
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maxargc <<= 1;
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argv = erealloc(argv, maxargc * sizeof(char *));
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}
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if (*p != '\0') {
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if (*p == '-') {
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argv[argc++] = p;
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p = strchr(p, '=');
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if (p) {
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*p = '\0';
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argv[argc++] = p+1;
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}
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} else {
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argv[argc++] = "-o";
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argv[argc++] = p;
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}
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}
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}
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*argcp = argc;
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*argvp = argv;
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*maxargcp = maxargc;
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}
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static const char *
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getfslab(const char *str)
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{
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#ifdef __minix
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errx(1, "cannot determine vfstype under minix");
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#else
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static struct dkwedge_info dkw;
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struct disklabel dl;
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int fd;
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char p;
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const char *vfstype;
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u_char t;
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/* deduce the file system type from the disk label */
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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);
|
|
}
|