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1392 lines
28 KiB
C
1392 lines
28 KiB
C
/* vi: set sw=4 ts=4: */
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/*
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* pfsck --- A generic, parallelizing front-end for the fsck program.
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* It will automatically try to run fsck programs in parallel if the
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* devices are on separate spindles. It is based on the same ideas as
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* the generic front end for fsck by David Engel and Fred van Kempen,
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* but it has been completely rewritten from scratch to support
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* parallel execution.
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*
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* Written by Theodore Ts'o, <tytso@mit.edu>
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*
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* Miquel van Smoorenburg (miquels@drinkel.ow.org) 20-Oct-1994:
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* o Changed -t fstype to behave like with mount when -A (all file
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* systems) or -M (like mount) is specified.
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* o fsck looks if it can find the fsck.type program to decide
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* if it should ignore the fs type. This way more fsck programs
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* can be added without changing this front-end.
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* o -R flag skip root file system.
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*
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* Copyright (C) 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000,
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* 2001, 2002, 2003, 2004, 2005 by Theodore Ts'o.
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*
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* %Begin-Header%
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* This file may be redistributed under the terms of the GNU Public
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* License.
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* %End-Header%
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*/
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#include <sys/types.h>
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#include <sys/wait.h>
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#include <sys/stat.h>
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#include <limits.h>
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#include <stdio.h>
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#include <ctype.h>
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#include <string.h>
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#include <time.h>
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#include <stdlib.h>
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#include <errno.h>
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#include <paths.h>
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#include <unistd.h>
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#include <errno.h>
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#include <signal.h>
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#include "fsck.h"
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#include "blkid/blkid.h"
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#include "e2fsbb.h"
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#include "libbb.h"
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#ifndef _PATH_MNTTAB
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#define _PATH_MNTTAB "/etc/fstab"
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#endif
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/*
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* fsck.h
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*/
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#ifndef DEFAULT_FSTYPE
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#define DEFAULT_FSTYPE "ext2"
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#endif
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#define MAX_DEVICES 32
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#define MAX_ARGS 32
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/*
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* Internal structure for mount tabel entries.
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*/
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struct fs_info {
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char *device;
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char *mountpt;
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char *type;
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char *opts;
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int freq;
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int passno;
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int flags;
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struct fs_info *next;
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};
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#define FLAG_DONE 1
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#define FLAG_PROGRESS 2
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/*
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* Structure to allow exit codes to be stored
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*/
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struct fsck_instance {
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int pid;
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int flags;
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int exit_status;
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time_t start_time;
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char * prog;
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char * type;
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char * device;
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char * base_device;
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struct fsck_instance *next;
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};
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/*
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* base_device.c
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*
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* Return the "base device" given a particular device; this is used to
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* assure that we only fsck one partition on a particular drive at any
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* one time. Otherwise, the disk heads will be seeking all over the
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* place. If the base device cannot be determined, return NULL.
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*
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* The base_device() function returns an allocated string which must
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* be freed.
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*
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*/
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#ifdef CONFIG_FEATURE_DEVFS
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/*
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* Required for the uber-silly devfs /dev/ide/host1/bus2/target3/lun3
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* pathames.
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*/
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static const char *const devfs_hier[] = {
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"host", "bus", "target", "lun", 0
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};
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#endif
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static char *base_device(const char *device)
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{
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char *str, *cp;
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#ifdef CONFIG_FEATURE_DEVFS
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const char *const *hier;
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const char *disk;
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int len;
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#endif
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cp = str = xstrdup(device);
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/* Skip over /dev/; if it's not present, give up. */
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if (strncmp(cp, "/dev/", 5) != 0)
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goto errout;
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cp += 5;
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/*
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* For md devices, we treat them all as if they were all
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* on one disk, since we don't know how to parallelize them.
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*/
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if (cp[0] == 'm' && cp[1] == 'd') {
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*(cp+2) = 0;
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return str;
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}
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/* Handle DAC 960 devices */
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if (strncmp(cp, "rd/", 3) == 0) {
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cp += 3;
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if (cp[0] != 'c' || cp[2] != 'd' ||
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!isdigit(cp[1]) || !isdigit(cp[3]))
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goto errout;
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*(cp+4) = 0;
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return str;
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}
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/* Now let's handle /dev/hd* and /dev/sd* devices.... */
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if ((cp[0] == 'h' || cp[0] == 's') && (cp[1] == 'd')) {
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cp += 2;
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/* If there's a single number after /dev/hd, skip it */
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if (isdigit(*cp))
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cp++;
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/* What follows must be an alpha char, or give up */
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if (!isalpha(*cp))
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goto errout;
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*(cp + 1) = 0;
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return str;
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}
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#ifdef CONFIG_FEATURE_DEVFS
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/* Now let's handle devfs (ugh) names */
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len = 0;
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if (strncmp(cp, "ide/", 4) == 0)
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len = 4;
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if (strncmp(cp, "scsi/", 5) == 0)
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len = 5;
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if (len) {
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cp += len;
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/*
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* Now we proceed down the expected devfs hierarchy.
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* i.e., .../host1/bus2/target3/lun4/...
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* If we don't find the expected token, followed by
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* some number of digits at each level, abort.
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*/
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for (hier = devfs_hier; *hier; hier++) {
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len = strlen(*hier);
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if (strncmp(cp, *hier, len) != 0)
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goto errout;
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cp += len;
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while (*cp != '/' && *cp != 0) {
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if (!isdigit(*cp))
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goto errout;
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cp++;
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}
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cp++;
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}
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*(cp - 1) = 0;
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return str;
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}
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/* Now handle devfs /dev/disc or /dev/disk names */
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disk = 0;
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if (strncmp(cp, "discs/", 6) == 0)
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disk = "disc";
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else if (strncmp(cp, "disks/", 6) == 0)
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disk = "disk";
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if (disk) {
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cp += 6;
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if (strncmp(cp, disk, 4) != 0)
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goto errout;
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cp += 4;
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while (*cp != '/' && *cp != 0) {
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if (!isdigit(*cp))
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goto errout;
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cp++;
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}
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*cp = 0;
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return str;
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}
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#endif
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errout:
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free(str);
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return NULL;
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}
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static const char *const ignored_types[] = {
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"ignore",
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"iso9660",
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"nfs",
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"proc",
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"sw",
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"swap",
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"tmpfs",
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"devpts",
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NULL
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};
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static const char *const really_wanted[] = {
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"minix",
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"ext2",
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"ext3",
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"jfs",
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"reiserfs",
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"xiafs",
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"xfs",
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NULL
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};
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#define BASE_MD "/dev/md"
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/*
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* Global variables for options
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*/
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static char *devices[MAX_DEVICES];
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static char *args[MAX_ARGS];
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static int num_devices, num_args;
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static int verbose;
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static int doall;
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static int noexecute;
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static int serialize;
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static int skip_root;
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static int like_mount;
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static int notitle;
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static int parallel_root;
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static int progress;
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static int progress_fd;
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static int force_all_parallel;
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static int num_running;
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static int max_running;
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static volatile int cancel_requested;
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static int kill_sent;
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static char *fstype;
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static struct fs_info *filesys_info, *filesys_last;
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static struct fsck_instance *instance_list;
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static char *fsck_path;
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static blkid_cache cache;
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static char *string_copy(const char *s)
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{
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char *ret;
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if (!s)
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return 0;
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ret = xstrdup(s);
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return ret;
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}
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static int string_to_int(const char *s)
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{
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long l;
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char *p;
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l = strtol(s, &p, 0);
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if (*p || l == LONG_MIN || l == LONG_MAX || l < 0 || l > INT_MAX)
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return -1;
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else
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return (int) l;
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}
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static char *skip_over_blank(char *cp)
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{
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while (*cp && isspace(*cp))
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cp++;
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return cp;
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}
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static char *skip_over_word(char *cp)
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{
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while (*cp && !isspace(*cp))
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cp++;
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return cp;
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}
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static void strip_line(char *line)
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{
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char *p;
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while (*line) {
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p = line + strlen(line) - 1;
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if ((*p == '\n') || (*p == '\r'))
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*p = 0;
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else
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break;
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}
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}
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static char *parse_word(char **buf)
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{
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char *word, *next;
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word = *buf;
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if (*word == 0)
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return 0;
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word = skip_over_blank(word);
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next = skip_over_word(word);
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if (*next)
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*next++ = 0;
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*buf = next;
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return word;
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}
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static void parse_escape(char *word)
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{
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char *q, c;
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const char *p;
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if (!word)
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return;
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for (p = q = word; *p; q++) {
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c = *p++;
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if (c != '\\') {
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*q = c;
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} else {
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*q = bb_process_escape_sequence(&p);
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}
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}
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*q = 0;
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}
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static void free_instance(struct fsck_instance *i)
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{
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if (i->prog)
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free(i->prog);
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if (i->device)
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free(i->device);
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if (i->base_device)
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free(i->base_device);
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free(i);
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}
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static struct fs_info *create_fs_device(const char *device, const char *mntpnt,
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const char *type, const char *opts,
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int freq, int passno)
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{
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struct fs_info *fs;
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if (!(fs = malloc(sizeof(struct fs_info))))
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return NULL;
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fs->device = string_copy(device);
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fs->mountpt = string_copy(mntpnt);
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fs->type = string_copy(type);
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fs->opts = string_copy(opts ? opts : "");
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fs->freq = freq;
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fs->passno = passno;
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fs->flags = 0;
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fs->next = NULL;
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if (!filesys_info)
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filesys_info = fs;
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else
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filesys_last->next = fs;
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filesys_last = fs;
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return fs;
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}
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static int parse_fstab_line(char *line, struct fs_info **ret_fs)
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{
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char *dev, *device, *mntpnt, *type, *opts, *freq, *passno, *cp;
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struct fs_info *fs;
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*ret_fs = 0;
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strip_line(line);
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if ((cp = strchr(line, '#')))
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*cp = 0; /* Ignore everything after the comment char */
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cp = line;
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device = parse_word(&cp);
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mntpnt = parse_word(&cp);
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type = parse_word(&cp);
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opts = parse_word(&cp);
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freq = parse_word(&cp);
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passno = parse_word(&cp);
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if (!device)
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return 0; /* Allow blank lines */
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if (!mntpnt || !type)
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return -1;
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parse_escape(device);
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parse_escape(mntpnt);
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parse_escape(type);
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parse_escape(opts);
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parse_escape(freq);
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parse_escape(passno);
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dev = blkid_get_devname(cache, device, NULL);
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if (dev)
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device = dev;
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if (strchr(type, ','))
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type = 0;
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fs = create_fs_device(device, mntpnt, type ? type : "auto", opts,
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freq ? atoi(freq) : -1,
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passno ? atoi(passno) : -1);
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if (dev)
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free(dev);
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if (!fs)
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return -1;
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*ret_fs = fs;
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return 0;
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}
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static void interpret_type(struct fs_info *fs)
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{
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char *t;
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if (strcmp(fs->type, "auto") != 0)
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return;
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t = blkid_get_tag_value(cache, "TYPE", fs->device);
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if (t) {
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free(fs->type);
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fs->type = t;
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}
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}
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/*
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* Load the filesystem database from /etc/fstab
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*/
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static void load_fs_info(const char *filename)
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{
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FILE *f;
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char buf[1024];
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int lineno = 0;
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int old_fstab = 1;
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struct fs_info *fs;
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if ((f = fopen_or_warn(filename, "r")) == NULL) {
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return;
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}
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while (!feof(f)) {
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lineno++;
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if (!fgets(buf, sizeof(buf), f))
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break;
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buf[sizeof(buf)-1] = 0;
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if (parse_fstab_line(buf, &fs) < 0) {
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bb_error_msg("WARNING: bad format "
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"on line %d of %s\n", lineno, filename);
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continue;
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}
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if (!fs)
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continue;
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if (fs->passno < 0)
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fs->passno = 0;
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else
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old_fstab = 0;
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}
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|
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fclose(f);
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if (old_fstab) {
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fputs("\007\007\007"
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"WARNING: Your /etc/fstab does not contain the fsck passno\n"
|
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" field. I will kludge around things for you, but you\n"
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|
" should fix your /etc/fstab file as soon as you can.\n\n", stderr);
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|
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for (fs = filesys_info; fs; fs = fs->next) {
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fs->passno = 1;
|
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}
|
|
}
|
|
}
|
|
|
|
/* Lookup filesys in /etc/fstab and return the corresponding entry. */
|
|
static struct fs_info *lookup(char *filesys)
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|
{
|
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struct fs_info *fs;
|
|
|
|
/* No filesys name given. */
|
|
if (filesys == NULL)
|
|
return NULL;
|
|
|
|
for (fs = filesys_info; fs; fs = fs->next) {
|
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if (!strcmp(filesys, fs->device) ||
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(fs->mountpt && !strcmp(filesys, fs->mountpt)))
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break;
|
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}
|
|
|
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return fs;
|
|
}
|
|
|
|
/* Find fsck program for a given fs type. */
|
|
static char *find_fsck(char *type)
|
|
{
|
|
char *s;
|
|
const char *tpl;
|
|
char *p = string_copy(fsck_path);
|
|
struct stat st;
|
|
|
|
/* Are we looking for a program or just a type? */
|
|
tpl = (strncmp(type, "fsck.", 5) ? "%s/fsck.%s" : "%s/%s");
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|
|
|
for(s = strtok(p, ":"); s; s = strtok(NULL, ":")) {
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s = xasprintf(tpl, s, type);
|
|
if (stat(s, &st) == 0) break;
|
|
free(s);
|
|
}
|
|
free(p);
|
|
return s;
|
|
}
|
|
|
|
static int progress_active(void)
|
|
{
|
|
struct fsck_instance *inst;
|
|
|
|
for (inst = instance_list; inst; inst = inst->next) {
|
|
if (inst->flags & FLAG_DONE)
|
|
continue;
|
|
if (inst->flags & FLAG_PROGRESS)
|
|
return 1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Execute a particular fsck program, and link it into the list of
|
|
* child processes we are waiting for.
|
|
*/
|
|
static int execute(const char *type, const char *device, const char *mntpt,
|
|
int interactive)
|
|
{
|
|
char *s, *argv[80];
|
|
char *prog;
|
|
int argc, i;
|
|
struct fsck_instance *inst, *p;
|
|
pid_t pid;
|
|
|
|
inst = malloc(sizeof(struct fsck_instance));
|
|
if (!inst)
|
|
return ENOMEM;
|
|
memset(inst, 0, sizeof(struct fsck_instance));
|
|
|
|
prog = xasprintf("fsck.%s", type);
|
|
argv[0] = prog;
|
|
argc = 1;
|
|
|
|
for (i=0; i <num_args; i++)
|
|
argv[argc++] = string_copy(args[i]);
|
|
|
|
if (progress && !progress_active()) {
|
|
if ((strcmp(type, "ext2") == 0) ||
|
|
(strcmp(type, "ext3") == 0)) {
|
|
char tmp[80];
|
|
snprintf(tmp, 80, "-C%d", progress_fd);
|
|
argv[argc++] = string_copy(tmp);
|
|
inst->flags |= FLAG_PROGRESS;
|
|
}
|
|
}
|
|
|
|
argv[argc++] = string_copy(device);
|
|
argv[argc] = 0;
|
|
|
|
s = find_fsck(prog);
|
|
if (s == NULL) {
|
|
bb_error_msg("%s: not found", prog);
|
|
return ENOENT;
|
|
}
|
|
|
|
if (verbose || noexecute) {
|
|
printf("[%s (%d) -- %s] ", s, num_running,
|
|
mntpt ? mntpt : device);
|
|
for (i=0; i < argc; i++)
|
|
printf("%s ", argv[i]);
|
|
bb_putchar('\n');
|
|
}
|
|
|
|
/* Fork and execute the correct program. */
|
|
if (noexecute)
|
|
pid = -1;
|
|
else if ((pid = fork()) < 0) {
|
|
perror("fork");
|
|
return errno;
|
|
} else if (pid == 0) {
|
|
if (!interactive)
|
|
close(0);
|
|
(void) execv(s, argv);
|
|
bb_simple_perror_msg_and_die(argv[0]);
|
|
}
|
|
|
|
for (i = 1; i < argc; i++)
|
|
free(argv[i]);
|
|
|
|
free(s);
|
|
inst->pid = pid;
|
|
inst->prog = prog;
|
|
inst->type = string_copy(type);
|
|
inst->device = string_copy(device);
|
|
inst->base_device = base_device(device);
|
|
inst->start_time = time(0);
|
|
inst->next = NULL;
|
|
|
|
/*
|
|
* Find the end of the list, so we add the instance on at the end.
|
|
*/
|
|
for (p = instance_list; p && p->next; p = p->next);
|
|
|
|
if (p)
|
|
p->next = inst;
|
|
else
|
|
instance_list = inst;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Send a signal to all outstanding fsck child processes
|
|
*/
|
|
static int kill_all(int signum)
|
|
{
|
|
struct fsck_instance *inst;
|
|
int n = 0;
|
|
|
|
for (inst = instance_list; inst; inst = inst->next) {
|
|
if (inst->flags & FLAG_DONE)
|
|
continue;
|
|
kill(inst->pid, signum);
|
|
n++;
|
|
}
|
|
return n;
|
|
}
|
|
|
|
/*
|
|
* Wait for one child process to exit; when it does, unlink it from
|
|
* the list of executing child processes, and return it.
|
|
*/
|
|
static struct fsck_instance *wait_one(int flags)
|
|
{
|
|
int status;
|
|
int sig;
|
|
struct fsck_instance *inst, *inst2, *prev;
|
|
pid_t pid;
|
|
|
|
if (!instance_list)
|
|
return NULL;
|
|
|
|
if (noexecute) {
|
|
inst = instance_list;
|
|
prev = 0;
|
|
#ifdef RANDOM_DEBUG
|
|
while (inst->next && (random() & 1)) {
|
|
prev = inst;
|
|
inst = inst->next;
|
|
}
|
|
#endif
|
|
inst->exit_status = 0;
|
|
goto ret_inst;
|
|
}
|
|
|
|
/*
|
|
* gcc -Wall fails saving throw against stupidity
|
|
* (inst and prev are thought to be uninitialized variables)
|
|
*/
|
|
inst = prev = NULL;
|
|
|
|
do {
|
|
pid = waitpid(-1, &status, flags);
|
|
if (cancel_requested && !kill_sent) {
|
|
kill_all(SIGTERM);
|
|
kill_sent++;
|
|
}
|
|
if ((pid == 0) && (flags & WNOHANG))
|
|
return NULL;
|
|
if (pid < 0) {
|
|
if ((errno == EINTR) || (errno == EAGAIN))
|
|
continue;
|
|
if (errno == ECHILD) {
|
|
bb_error_msg("wait: no more child process?!?");
|
|
return NULL;
|
|
}
|
|
perror("wait");
|
|
continue;
|
|
}
|
|
for (prev = 0, inst = instance_list;
|
|
inst;
|
|
prev = inst, inst = inst->next) {
|
|
if (inst->pid == pid)
|
|
break;
|
|
}
|
|
} while (!inst);
|
|
|
|
if (WIFEXITED(status))
|
|
status = WEXITSTATUS(status);
|
|
else if (WIFSIGNALED(status)) {
|
|
sig = WTERMSIG(status);
|
|
if (sig == SIGINT) {
|
|
status = EXIT_UNCORRECTED;
|
|
} else {
|
|
printf("Warning... %s for device %s exited "
|
|
"with signal %d.\n",
|
|
inst->prog, inst->device, sig);
|
|
status = EXIT_ERROR;
|
|
}
|
|
} else {
|
|
printf("%s %s: status is %x, should never happen.\n",
|
|
inst->prog, inst->device, status);
|
|
status = EXIT_ERROR;
|
|
}
|
|
inst->exit_status = status;
|
|
if (progress && (inst->flags & FLAG_PROGRESS) &&
|
|
!progress_active()) {
|
|
for (inst2 = instance_list; inst2; inst2 = inst2->next) {
|
|
if (inst2->flags & FLAG_DONE)
|
|
continue;
|
|
if (strcmp(inst2->type, "ext2") &&
|
|
strcmp(inst2->type, "ext3"))
|
|
continue;
|
|
/*
|
|
* If we've just started the fsck, wait a tiny
|
|
* bit before sending the kill, to give it
|
|
* time to set up the signal handler
|
|
*/
|
|
if (inst2->start_time < time(0)+2) {
|
|
if (fork() == 0) {
|
|
sleep(1);
|
|
kill(inst2->pid, SIGUSR1);
|
|
exit(0);
|
|
}
|
|
} else
|
|
kill(inst2->pid, SIGUSR1);
|
|
inst2->flags |= FLAG_PROGRESS;
|
|
break;
|
|
}
|
|
}
|
|
ret_inst:
|
|
if (prev)
|
|
prev->next = inst->next;
|
|
else
|
|
instance_list = inst->next;
|
|
if (verbose > 1)
|
|
printf("Finished with %s (exit status %d)\n",
|
|
inst->device, inst->exit_status);
|
|
num_running--;
|
|
return inst;
|
|
}
|
|
|
|
#define FLAG_WAIT_ALL 0
|
|
#define FLAG_WAIT_ATLEAST_ONE 1
|
|
/*
|
|
* Wait until all executing child processes have exited; return the
|
|
* logical OR of all of their exit code values.
|
|
*/
|
|
static int wait_many(int flags)
|
|
{
|
|
struct fsck_instance *inst;
|
|
int global_status = 0;
|
|
int wait_flags = 0;
|
|
|
|
while ((inst = wait_one(wait_flags))) {
|
|
global_status |= inst->exit_status;
|
|
free_instance(inst);
|
|
#ifdef RANDOM_DEBUG
|
|
if (noexecute && (flags & WNOHANG) && !(random() % 3))
|
|
break;
|
|
#endif
|
|
if (flags & FLAG_WAIT_ATLEAST_ONE)
|
|
wait_flags = WNOHANG;
|
|
}
|
|
return global_status;
|
|
}
|
|
|
|
/*
|
|
* Run the fsck program on a particular device
|
|
*
|
|
* If the type is specified using -t, and it isn't prefixed with "no"
|
|
* (as in "noext2") and only one filesystem type is specified, then
|
|
* use that type regardless of what is specified in /etc/fstab.
|
|
*
|
|
* If the type isn't specified by the user, then use either the type
|
|
* specified in /etc/fstab, or DEFAULT_FSTYPE.
|
|
*/
|
|
static void fsck_device(struct fs_info *fs, int interactive)
|
|
{
|
|
const char *type;
|
|
int retval;
|
|
|
|
interpret_type(fs);
|
|
|
|
if (strcmp(fs->type, "auto") != 0)
|
|
type = fs->type;
|
|
else if (fstype && strncmp(fstype, "no", 2) &&
|
|
strncmp(fstype, "opts=", 5) && strncmp(fstype, "loop", 4) &&
|
|
!strchr(fstype, ','))
|
|
type = fstype;
|
|
else
|
|
type = DEFAULT_FSTYPE;
|
|
|
|
num_running++;
|
|
retval = execute(type, fs->device, fs->mountpt, interactive);
|
|
if (retval) {
|
|
bb_error_msg("error %d while executing fsck.%s for %s",
|
|
retval, type, fs->device);
|
|
num_running--;
|
|
}
|
|
}
|
|
|
|
|
|
/*
|
|
* Deal with the fsck -t argument.
|
|
*/
|
|
struct fs_type_compile {
|
|
char **list;
|
|
int *type;
|
|
int negate;
|
|
} fs_type_compiled;
|
|
|
|
#define FS_TYPE_NORMAL 0
|
|
#define FS_TYPE_OPT 1
|
|
#define FS_TYPE_NEGOPT 2
|
|
|
|
static const char fs_type_syntax_error[] =
|
|
"Either all or none of the filesystem types passed to -t must be prefixed\n"
|
|
"with 'no' or '!'.";
|
|
|
|
static void compile_fs_type(char *fs_type, struct fs_type_compile *cmp)
|
|
{
|
|
char *cp, *list, *s;
|
|
int num = 2;
|
|
int negate, first_negate = 1;
|
|
|
|
if (fs_type) {
|
|
for (cp=fs_type; *cp; cp++) {
|
|
if (*cp == ',')
|
|
num++;
|
|
}
|
|
}
|
|
|
|
cmp->list = xzalloc(num * sizeof(char *));
|
|
cmp->type = xzalloc(num * sizeof(int));
|
|
cmp->negate = 0;
|
|
|
|
if (!fs_type)
|
|
return;
|
|
|
|
list = string_copy(fs_type);
|
|
num = 0;
|
|
s = strtok(list, ",");
|
|
while(s) {
|
|
negate = 0;
|
|
if (strncmp(s, "no", 2) == 0) {
|
|
s += 2;
|
|
negate = 1;
|
|
} else if (*s == '!') {
|
|
s++;
|
|
negate = 1;
|
|
}
|
|
if (strcmp(s, "loop") == 0)
|
|
/* loop is really short-hand for opts=loop */
|
|
goto loop_special_case;
|
|
else if (strncmp(s, "opts=", 5) == 0) {
|
|
s += 5;
|
|
loop_special_case:
|
|
cmp->type[num] = negate ? FS_TYPE_NEGOPT : FS_TYPE_OPT;
|
|
} else {
|
|
if (first_negate) {
|
|
cmp->negate = negate;
|
|
first_negate = 0;
|
|
}
|
|
if ((negate && !cmp->negate) ||
|
|
(!negate && cmp->negate)) {
|
|
bb_error_msg_and_die("%s", fs_type_syntax_error);
|
|
}
|
|
}
|
|
cmp->list[num++] = string_copy(s);
|
|
s = strtok(NULL, ",");
|
|
}
|
|
free(list);
|
|
}
|
|
|
|
/*
|
|
* This function returns true if a particular option appears in a
|
|
* comma-delimited options list
|
|
*/
|
|
static int opt_in_list(char *opt, char *optlist)
|
|
{
|
|
char *list, *s;
|
|
|
|
if (!optlist)
|
|
return 0;
|
|
list = string_copy(optlist);
|
|
|
|
s = strtok(list, ",");
|
|
while(s) {
|
|
if (strcmp(s, opt) == 0) {
|
|
free(list);
|
|
return 1;
|
|
}
|
|
s = strtok(NULL, ",");
|
|
}
|
|
free(list);
|
|
return 0;
|
|
}
|
|
|
|
/* See if the filesystem matches the criteria given by the -t option */
|
|
static int fs_match(struct fs_info *fs, struct fs_type_compile *cmp)
|
|
{
|
|
int n, ret = 0, checked_type = 0;
|
|
char *cp;
|
|
|
|
if (cmp->list == 0 || cmp->list[0] == 0)
|
|
return 1;
|
|
|
|
for (n=0; (cp = cmp->list[n]); n++) {
|
|
switch (cmp->type[n]) {
|
|
case FS_TYPE_NORMAL:
|
|
checked_type++;
|
|
if (strcmp(cp, fs->type) == 0) {
|
|
ret = 1;
|
|
}
|
|
break;
|
|
case FS_TYPE_NEGOPT:
|
|
if (opt_in_list(cp, fs->opts))
|
|
return 0;
|
|
break;
|
|
case FS_TYPE_OPT:
|
|
if (!opt_in_list(cp, fs->opts))
|
|
return 0;
|
|
break;
|
|
}
|
|
}
|
|
if (checked_type == 0)
|
|
return 1;
|
|
return (cmp->negate ? !ret : ret);
|
|
}
|
|
|
|
/* Check if we should ignore this filesystem. */
|
|
static int ignore(struct fs_info *fs)
|
|
{
|
|
int wanted;
|
|
char *s;
|
|
|
|
/*
|
|
* If the pass number is 0, ignore it.
|
|
*/
|
|
if (fs->passno == 0)
|
|
return 1;
|
|
|
|
interpret_type(fs);
|
|
|
|
/*
|
|
* If a specific fstype is specified, and it doesn't match,
|
|
* ignore it.
|
|
*/
|
|
if (!fs_match(fs, &fs_type_compiled)) return 1;
|
|
|
|
/* Are we ignoring this type? */
|
|
if (index_in_str_array(ignored_types, fs->type) >= 0)
|
|
return 1;
|
|
|
|
/* Do we really really want to check this fs? */
|
|
wanted = index_in_str_array(really_wanted, fs->type) >= 0;
|
|
|
|
/* See if the <fsck.fs> program is available. */
|
|
s = find_fsck(fs->type);
|
|
if (s == NULL) {
|
|
if (wanted)
|
|
bb_error_msg("cannot check %s: fsck.%s not found",
|
|
fs->device, fs->type);
|
|
return 1;
|
|
}
|
|
free(s);
|
|
|
|
/* We can and want to check this file system type. */
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Returns TRUE if a partition on the same disk is already being
|
|
* checked.
|
|
*/
|
|
static int device_already_active(char *device)
|
|
{
|
|
struct fsck_instance *inst;
|
|
char *base;
|
|
|
|
if (force_all_parallel)
|
|
return 0;
|
|
|
|
#ifdef BASE_MD
|
|
/* Don't check a soft raid disk with any other disk */
|
|
if (instance_list &&
|
|
(!strncmp(instance_list->device, BASE_MD, sizeof(BASE_MD)-1) ||
|
|
!strncmp(device, BASE_MD, sizeof(BASE_MD)-1)))
|
|
return 1;
|
|
#endif
|
|
|
|
base = base_device(device);
|
|
/*
|
|
* If we don't know the base device, assume that the device is
|
|
* already active if there are any fsck instances running.
|
|
*/
|
|
if (!base)
|
|
return (instance_list != 0);
|
|
for (inst = instance_list; inst; inst = inst->next) {
|
|
if (!inst->base_device || !strcmp(base, inst->base_device)) {
|
|
free(base);
|
|
return 1;
|
|
}
|
|
}
|
|
free(base);
|
|
return 0;
|
|
}
|
|
|
|
/* Check all file systems, using the /etc/fstab table. */
|
|
static int check_all(void)
|
|
{
|
|
struct fs_info *fs = NULL;
|
|
int status = EXIT_OK;
|
|
int not_done_yet = 1;
|
|
int passno = 1;
|
|
int pass_done;
|
|
|
|
if (verbose)
|
|
fputs("Checking all file systems.\n", stdout);
|
|
|
|
/*
|
|
* Do an initial scan over the filesystem; mark filesystems
|
|
* which should be ignored as done, and resolve any "auto"
|
|
* filesystem types (done as a side-effect of calling ignore()).
|
|
*/
|
|
for (fs = filesys_info; fs; fs = fs->next) {
|
|
if (ignore(fs))
|
|
fs->flags |= FLAG_DONE;
|
|
}
|
|
|
|
/*
|
|
* Find and check the root filesystem.
|
|
*/
|
|
if (!parallel_root) {
|
|
for (fs = filesys_info; fs; fs = fs->next) {
|
|
if (LONE_CHAR(fs->mountpt, '/'))
|
|
break;
|
|
}
|
|
if (fs) {
|
|
if (!skip_root && !ignore(fs)) {
|
|
fsck_device(fs, 1);
|
|
status |= wait_many(FLAG_WAIT_ALL);
|
|
if (status > EXIT_NONDESTRUCT)
|
|
return status;
|
|
}
|
|
fs->flags |= FLAG_DONE;
|
|
}
|
|
}
|
|
/*
|
|
* This is for the bone-headed user who enters the root
|
|
* filesystem twice. Skip root will skep all root entries.
|
|
*/
|
|
if (skip_root)
|
|
for (fs = filesys_info; fs; fs = fs->next)
|
|
if (LONE_CHAR(fs->mountpt, '/'))
|
|
fs->flags |= FLAG_DONE;
|
|
|
|
while (not_done_yet) {
|
|
not_done_yet = 0;
|
|
pass_done = 1;
|
|
|
|
for (fs = filesys_info; fs; fs = fs->next) {
|
|
if (cancel_requested)
|
|
break;
|
|
if (fs->flags & FLAG_DONE)
|
|
continue;
|
|
/*
|
|
* If the filesystem's pass number is higher
|
|
* than the current pass number, then we don't
|
|
* do it yet.
|
|
*/
|
|
if (fs->passno > passno) {
|
|
not_done_yet++;
|
|
continue;
|
|
}
|
|
/*
|
|
* If a filesystem on a particular device has
|
|
* already been spawned, then we need to defer
|
|
* this to another pass.
|
|
*/
|
|
if (device_already_active(fs->device)) {
|
|
pass_done = 0;
|
|
continue;
|
|
}
|
|
/*
|
|
* Spawn off the fsck process
|
|
*/
|
|
fsck_device(fs, serialize);
|
|
fs->flags |= FLAG_DONE;
|
|
|
|
/*
|
|
* Only do one filesystem at a time, or if we
|
|
* have a limit on the number of fsck's extant
|
|
* at one time, apply that limit.
|
|
*/
|
|
if (serialize ||
|
|
(max_running && (num_running >= max_running))) {
|
|
pass_done = 0;
|
|
break;
|
|
}
|
|
}
|
|
if (cancel_requested)
|
|
break;
|
|
if (verbose > 1)
|
|
printf("--waiting-- (pass %d)\n", passno);
|
|
status |= wait_many(pass_done ? FLAG_WAIT_ALL :
|
|
FLAG_WAIT_ATLEAST_ONE);
|
|
if (pass_done) {
|
|
if (verbose > 1)
|
|
printf("----------------------------------\n");
|
|
passno++;
|
|
} else
|
|
not_done_yet++;
|
|
}
|
|
if (cancel_requested && !kill_sent) {
|
|
kill_all(SIGTERM);
|
|
kill_sent++;
|
|
}
|
|
status |= wait_many(FLAG_WAIT_ATLEAST_ONE);
|
|
return status;
|
|
}
|
|
|
|
static void signal_cancel(int sig FSCK_ATTR((unused)))
|
|
{
|
|
cancel_requested++;
|
|
}
|
|
|
|
static void PRS(int argc, char **argv)
|
|
{
|
|
int i, j;
|
|
char *arg, *dev, *tmp = 0;
|
|
char options[128];
|
|
int opt = 0;
|
|
int opts_for_fsck = 0;
|
|
struct sigaction sa;
|
|
|
|
/*
|
|
* Set up signal action
|
|
*/
|
|
memset(&sa, 0, sizeof(struct sigaction));
|
|
sa.sa_handler = signal_cancel;
|
|
sigaction(SIGINT, &sa, 0);
|
|
sigaction(SIGTERM, &sa, 0);
|
|
|
|
num_devices = 0;
|
|
num_args = 0;
|
|
instance_list = 0;
|
|
|
|
for (i=1; i < argc; i++) {
|
|
arg = argv[i];
|
|
if (!arg)
|
|
continue;
|
|
if ((arg[0] == '/' && !opts_for_fsck) || strchr(arg, '=')) {
|
|
if (num_devices >= MAX_DEVICES) {
|
|
bb_error_msg_and_die("too many devices");
|
|
}
|
|
dev = blkid_get_devname(cache, arg, NULL);
|
|
if (!dev && strchr(arg, '=')) {
|
|
/*
|
|
* Check to see if we failed because
|
|
* /proc/partitions isn't found.
|
|
*/
|
|
if (access("/proc/partitions", R_OK) < 0) {
|
|
bb_perror_msg_and_die("cannot open /proc/partitions "
|
|
"(is /proc mounted?)");
|
|
}
|
|
/*
|
|
* Check to see if this is because
|
|
* we're not running as root
|
|
*/
|
|
if (geteuid())
|
|
bb_error_msg_and_die(
|
|
"must be root to scan for matching filesystems: %s\n", arg);
|
|
else
|
|
bb_error_msg_and_die(
|
|
"cannot find matching filesystem: %s", arg);
|
|
}
|
|
devices[num_devices++] = dev ? dev : string_copy(arg);
|
|
continue;
|
|
}
|
|
if (arg[0] != '-' || opts_for_fsck) {
|
|
if (num_args >= MAX_ARGS) {
|
|
bb_error_msg_and_die("too many arguments");
|
|
}
|
|
args[num_args++] = string_copy(arg);
|
|
continue;
|
|
}
|
|
for (j=1; arg[j]; j++) {
|
|
if (opts_for_fsck) {
|
|
options[++opt] = arg[j];
|
|
continue;
|
|
}
|
|
switch (arg[j]) {
|
|
case 'A':
|
|
doall++;
|
|
break;
|
|
case 'C':
|
|
progress++;
|
|
if (arg[j+1]) {
|
|
progress_fd = string_to_int(arg+j+1);
|
|
if (progress_fd < 0)
|
|
progress_fd = 0;
|
|
else
|
|
goto next_arg;
|
|
} else if ((i+1) < argc
|
|
&& argv[i+1][0] != '-') {
|
|
progress_fd = string_to_int(argv[i]);
|
|
if (progress_fd < 0)
|
|
progress_fd = 0;
|
|
else {
|
|
goto next_arg;
|
|
i++;
|
|
}
|
|
}
|
|
break;
|
|
case 'V':
|
|
verbose++;
|
|
break;
|
|
case 'N':
|
|
noexecute++;
|
|
break;
|
|
case 'R':
|
|
skip_root++;
|
|
break;
|
|
case 'T':
|
|
notitle++;
|
|
break;
|
|
case 'M':
|
|
like_mount++;
|
|
break;
|
|
case 'P':
|
|
parallel_root++;
|
|
break;
|
|
case 's':
|
|
serialize++;
|
|
break;
|
|
case 't':
|
|
tmp = 0;
|
|
if (fstype)
|
|
bb_show_usage();
|
|
if (arg[j+1])
|
|
tmp = arg+j+1;
|
|
else if ((i+1) < argc)
|
|
tmp = argv[++i];
|
|
else
|
|
bb_show_usage();
|
|
fstype = string_copy(tmp);
|
|
compile_fs_type(fstype, &fs_type_compiled);
|
|
goto next_arg;
|
|
case '-':
|
|
opts_for_fsck++;
|
|
break;
|
|
case '?':
|
|
bb_show_usage();
|
|
break;
|
|
default:
|
|
options[++opt] = arg[j];
|
|
break;
|
|
}
|
|
}
|
|
next_arg:
|
|
if (opt) {
|
|
options[0] = '-';
|
|
options[++opt] = '\0';
|
|
if (num_args >= MAX_ARGS) {
|
|
bb_error_msg("too many arguments");
|
|
}
|
|
args[num_args++] = string_copy(options);
|
|
opt = 0;
|
|
}
|
|
}
|
|
if (getenv("FSCK_FORCE_ALL_PARALLEL"))
|
|
force_all_parallel++;
|
|
if ((tmp = getenv("FSCK_MAX_INST")))
|
|
max_running = atoi(tmp);
|
|
}
|
|
|
|
int fsck_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
|
|
int fsck_main(int argc, char **argv)
|
|
{
|
|
int i, status = 0;
|
|
int interactive = 0;
|
|
const char *fstab;
|
|
struct fs_info *fs;
|
|
|
|
setvbuf(stdout, NULL, _IONBF, BUFSIZ);
|
|
setvbuf(stderr, NULL, _IONBF, BUFSIZ);
|
|
|
|
blkid_get_cache(&cache, NULL);
|
|
PRS(argc, argv);
|
|
|
|
if (!notitle)
|
|
printf("fsck %s (%s)\n", E2FSPROGS_VERSION, E2FSPROGS_DATE);
|
|
|
|
fstab = getenv("FSTAB_FILE");
|
|
if (!fstab)
|
|
fstab = _PATH_MNTTAB;
|
|
load_fs_info(fstab);
|
|
|
|
fsck_path = e2fs_set_sbin_path();
|
|
|
|
if ((num_devices == 1) || (serialize))
|
|
interactive = 1;
|
|
|
|
/* If -A was specified ("check all"), do that! */
|
|
if (doall)
|
|
return check_all();
|
|
|
|
if (num_devices == 0) {
|
|
serialize++;
|
|
interactive++;
|
|
return check_all();
|
|
}
|
|
for (i = 0; i < num_devices; i++) {
|
|
if (cancel_requested) {
|
|
if (!kill_sent) {
|
|
kill_all(SIGTERM);
|
|
kill_sent++;
|
|
}
|
|
break;
|
|
}
|
|
fs = lookup(devices[i]);
|
|
if (!fs) {
|
|
fs = create_fs_device(devices[i], 0, "auto",
|
|
0, -1, -1);
|
|
if (!fs)
|
|
continue;
|
|
}
|
|
fsck_device(fs, interactive);
|
|
if (serialize ||
|
|
(max_running && (num_running >= max_running))) {
|
|
struct fsck_instance *inst;
|
|
|
|
inst = wait_one(0);
|
|
if (inst) {
|
|
status |= inst->exit_status;
|
|
free_instance(inst);
|
|
}
|
|
if (verbose > 1)
|
|
printf("----------------------------------\n");
|
|
}
|
|
}
|
|
status |= wait_many(FLAG_WAIT_ALL);
|
|
blkid_put_cache(cache);
|
|
return status;
|
|
}
|