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1245 lines
26 KiB
C
1245 lines
26 KiB
C
/* vi: set sw=4 ts=4: */
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/*
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* fsck --- 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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/* All filesystem specific hooks have been removed.
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* If filesystem cannot be determined, we will execute
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* "fsck.auto". Currently this also happens if you specify
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* UUID=xxx or LABEL=xxx as an object to check.
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* Detection code for that is also probably has to be in fsck.auto.
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*
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* In other words, this is _really_ is just a driver program which
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* spawns actual fsck.something for each filesystem to check.
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* It doesn't guess filesystem types from on-disk format.
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*/
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#include "busybox.h"
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#define EXIT_OK 0
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#define EXIT_NONDESTRUCT 1
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#define EXIT_DESTRUCT 2
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#define EXIT_UNCORRECTED 4
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#define EXIT_ERROR 8
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#define EXIT_USAGE 16
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#define FSCK_CANCELED 32 /* Aborted with a signal or ^C */
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/*
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* Internal structure for mount table entries.
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*/
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struct fs_info {
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struct fs_info *next;
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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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};
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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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struct fsck_instance *next;
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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; /* /dev/hda for /dev/hdaN etc */
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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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#if 0
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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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#endif
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#define BASE_MD "/dev/md"
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static char **devices;
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static char **args;
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static int num_devices;
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static int num_args;
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static int verbose;
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#define FS_TYPE_FLAG_NORMAL 0
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#define FS_TYPE_FLAG_OPT 1
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#define FS_TYPE_FLAG_NEGOPT 2
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static char **fs_type_list;
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static uint8_t *fs_type_flag;
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static smallint fs_type_negated;
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static volatile smallint cancel_requested;
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static smallint doall;
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static smallint noexecute;
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static smallint serialize;
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static smallint skip_root;
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/* static smallint like_mount; */
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static smallint notitle;
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static smallint parallel_root;
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static smallint force_all_parallel;
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/* "progress indicator" code is somewhat buggy and ext[23] specific.
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* We should be filesystem agnostic. IOW: there should be a well-defined
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* API for fsck.something, NOT ad-hoc hacks in generic fsck. */
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#define DO_PROGRESS_INDICATOR 0
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#if DO_PROGRESS_INDICATOR
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static smallint progress;
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static int progress_fd;
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#endif
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static int num_running;
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static int max_running;
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static char *fstype;
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static struct fs_info *filesys_info;
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static struct fs_info *filesys_last;
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static struct fsck_instance *instance_list;
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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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#if ENABLE_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", NULL
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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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#if ENABLE_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' || !isdigit(cp[1])
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|| cp[2] != 'd' || !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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#if ENABLE_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 void free_instance(struct fsck_instance *p)
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{
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free(p->prog);
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free(p->device);
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free(p->base_device);
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free(p);
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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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fs = xzalloc(sizeof(*fs));
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fs->device = xstrdup(device);
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fs->mountpt = xstrdup(mntpnt);
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fs->type = xstrdup(type);
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fs->opts = xstrdup(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 void strip_line(char *line)
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{
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char *p = line + strlen(line) - 1;
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while (*line) {
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if (*p != '\n' && *p != '\r')
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break;
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*p-- = '\0';
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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 NULL;
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word = skip_whitespace(word);
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next = skip_non_whitespace(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 int parse_fstab_line(char *line, struct fs_info **ret_fs)
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{
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char *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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cp = strchr(line, '#');
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if (cp)
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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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if (!device) return 0; /* Allow blank lines */
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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 (!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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if (strchr(type, ','))
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type = NULL;
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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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*ret_fs = fs;
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return 0;
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}
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/* Load the filesystem database from /etc/fstab */
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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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int lineno = 0;
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int old_fstab = 1;
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struct fs_info *fs;
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f = fopen_or_warn(filename, "r");
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if (f == NULL) {
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/*bb_perror_msg("WARNING: cannot open %s", filename);*/
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return;
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}
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while (1) {
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int r;
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char *buf = xmalloc_getline(f);
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if (!buf) break;
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r = parse_fstab_line(buf, &fs);
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free(buf);
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lineno++;
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if (r < 0) {
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bb_error_msg("WARNING: bad format "
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"on line %d of %s", 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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fclose(f);
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if (old_fstab) {
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fputs("\007"
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"WARNING: Your /etc/fstab does not contain the fsck passno field.\n"
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"I will kludge around things for you, but you should fix\n"
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"your /etc/fstab file as soon as you can.\n\n", stderr);
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for (fs = filesys_info; fs; fs = fs->next) {
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fs->passno = 1;
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}
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}
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}
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/* Lookup filesys in /etc/fstab and return the corresponding entry. */
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static struct fs_info *lookup(char *filesys)
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{
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struct fs_info *fs;
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for (fs = filesys_info; fs; fs = fs->next) {
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if (strcmp(filesys, fs->device) == 0
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|| (fs->mountpt && strcmp(filesys, fs->mountpt) == 0)
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)
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break;
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}
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return fs;
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}
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|
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#if DO_PROGRESS_INDICATOR
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static int progress_active(void)
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{
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struct fsck_instance *inst;
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|
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for (inst = instance_list; inst; inst = inst->next) {
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if (inst->flags & FLAG_DONE)
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continue;
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if (inst->flags & FLAG_PROGRESS)
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return 1;
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}
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return 0;
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}
|
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#endif
|
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|
|
|
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/*
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* Send a signal to all outstanding fsck child processes
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*/
|
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static void kill_all_if_cancel_requested(void)
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{
|
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static smallint kill_sent;
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|
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struct fsck_instance *inst;
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|
|
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if (!cancel_requested || kill_sent)
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return;
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|
|
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for (inst = instance_list; inst; inst = inst->next) {
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if (inst->flags & FLAG_DONE)
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continue;
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kill(inst->pid, SIGTERM);
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}
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|
kill_sent = 1;
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}
|
|
|
|
/*
|
|
* Wait for one child process to exit; when it does, unlink it from
|
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* the list of executing child processes, and return it.
|
|
*/
|
|
static struct fsck_instance *wait_one(int flags)
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|
{
|
|
int status;
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|
int sig;
|
|
struct fsck_instance *inst, *prev;
|
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pid_t pid;
|
|
|
|
if (!instance_list)
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|
return NULL;
|
|
|
|
if (noexecute) {
|
|
inst = instance_list;
|
|
prev = NULL;
|
|
#ifdef RANDOM_DEBUG
|
|
while (inst->next && (random() & 1)) {
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prev = inst;
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inst = inst->next;
|
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}
|
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#endif
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inst->exit_status = 0;
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goto ret_inst;
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}
|
|
|
|
/*
|
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* gcc -Wall fails saving throw against stupidity
|
|
* (inst and prev are thought to be uninitialized variables)
|
|
*/
|
|
inst = prev = NULL;
|
|
|
|
do {
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|
pid = waitpid(-1, &status, flags);
|
|
kill_all_if_cancel_requested();
|
|
if (pid == 0 && (flags & WNOHANG))
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return NULL;
|
|
if (pid < 0) {
|
|
if (errno == EINTR || errno == EAGAIN)
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continue;
|
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if (errno == ECHILD) {
|
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bb_error_msg("wait: no more child process?!?");
|
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return NULL;
|
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}
|
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bb_perror_msg("wait");
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continue;
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}
|
|
prev = NULL;
|
|
inst = instance_list;
|
|
while (inst) {
|
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if (inst->pid == pid)
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break;
|
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prev = inst;
|
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inst = inst->next;
|
|
}
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|
} while (!inst);
|
|
|
|
if (WIFEXITED(status))
|
|
status = WEXITSTATUS(status);
|
|
else if (WIFSIGNALED(status)) {
|
|
sig = WTERMSIG(status);
|
|
status = EXIT_UNCORRECTED;
|
|
if (sig != SIGINT) {
|
|
printf("Warning... %s %s exited "
|
|
"with signal %d\n",
|
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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 DO_PROGRESS_INDICATOR
|
|
if (progress && (inst->flags & FLAG_PROGRESS) && !progress_active()) {
|
|
struct fsck_instance *inst2;
|
|
for (inst2 = instance_list; inst2; inst2 = inst2->next) {
|
|
if (inst2->flags & FLAG_DONE)
|
|
continue;
|
|
if (strcmp(inst2->type, "ext2") != 0
|
|
&& strcmp(inst2->type, "ext3") != 0
|
|
) {
|
|
continue;
|
|
}
|
|
/* ext[23], we will send USR1
|
|
* (request to start displaying progress bar)
|
|
*
|
|
* 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(NULL) - 1)
|
|
sleep(1);
|
|
kill(inst2->pid, SIGUSR1);
|
|
inst2->flags |= FLAG_PROGRESS;
|
|
break;
|
|
}
|
|
}
|
|
#endif
|
|
|
|
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;
|
|
}
|
|
|
|
/*
|
|
* Execute a particular fsck program, and link it into the list of
|
|
* child processes we are waiting for.
|
|
*/
|
|
static void execute(const char *type, const char *device, const char *mntpt,
|
|
int interactive)
|
|
{
|
|
char *argv[num_args + 4]; /* see count below: */
|
|
int argc;
|
|
int i;
|
|
struct fsck_instance *inst;
|
|
pid_t pid;
|
|
|
|
inst = xzalloc(sizeof(*inst));
|
|
|
|
argv[0] = xasprintf("fsck.%s", type); /* 1 */
|
|
for (i = 0; i < num_args; i++)
|
|
argv[i+1] = args[i]; /* num_args */
|
|
argc = num_args + 1;
|
|
|
|
#if DO_PROGRESS_INDICATOR
|
|
if (progress && !progress_active()) {
|
|
if (strcmp(type, "ext2") == 0
|
|
|| strcmp(type, "ext3") == 0
|
|
) {
|
|
argv[argc++] = xasprintf("-C%d", progress_fd); /* 1 */
|
|
inst->flags |= FLAG_PROGRESS;
|
|
}
|
|
}
|
|
#endif
|
|
|
|
argv[argc++] = xstrdup(device); /* 1 */
|
|
argv[argc] = NULL; /* 1 */
|
|
|
|
if (verbose || noexecute) {
|
|
printf("[%s (%d) -- %s]", argv[0], num_running,
|
|
mntpt ? mntpt : device);
|
|
for (i = 0; i < argc; i++)
|
|
printf(" %s", argv[i]);
|
|
puts("");
|
|
}
|
|
|
|
/* Fork and execute the correct program. */
|
|
pid = -1;
|
|
if (!noexecute) {
|
|
/* TODO: NOMMU friendly way (vfork)? */
|
|
pid = fork();
|
|
if (pid < 0)
|
|
bb_perror_msg_and_die("fork");
|
|
if (pid == 0) {
|
|
/* Child */
|
|
if (!interactive) {
|
|
/* NB: e2fsck will complain because of this!
|
|
* Use "fsck -s" to avoid... */
|
|
close(0);
|
|
}
|
|
BB_EXECVP(argv[0], argv);
|
|
bb_perror_msg_and_die("%s", argv[0]);
|
|
}
|
|
}
|
|
|
|
for (i = num_args+1; i < argc; i++)
|
|
free(argv[i]);
|
|
|
|
inst->pid = pid;
|
|
inst->prog = argv[0];
|
|
inst->type = xstrdup(type);
|
|
inst->device = xstrdup(device);
|
|
inst->base_device = base_device(device);
|
|
inst->start_time = time(NULL);
|
|
|
|
/* Add to the list of running fsck's.
|
|
* (was adding to the end, but adding to the front is simpler...) */
|
|
inst->next = instance_list;
|
|
instance_list = inst;
|
|
}
|
|
|
|
/*
|
|
* 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 "auto".
|
|
*/
|
|
static void fsck_device(struct fs_info *fs, int interactive)
|
|
{
|
|
const char *type;
|
|
|
|
if (strcmp(fs->type, "auto") != 0) {
|
|
type = fs->type;
|
|
if (verbose > 2)
|
|
bb_info_msg("using filesystem type '%s' %s",
|
|
type, "from fstab");
|
|
} else if (fstype
|
|
&& (fstype[0] != 'n' || fstype[1] != 'o') /* != "no" */
|
|
&& strncmp(fstype, "opts=", 5) != 0
|
|
&& strncmp(fstype, "loop", 4) != 0
|
|
&& !strchr(fstype, ',')
|
|
) {
|
|
type = fstype;
|
|
if (verbose > 2)
|
|
bb_info_msg("using filesystem type '%s' %s",
|
|
type, "from -t");
|
|
} else {
|
|
type = "auto";
|
|
if (verbose > 2)
|
|
bb_info_msg("using filesystem type '%s' %s",
|
|
type, "(default)");
|
|
}
|
|
|
|
num_running++;
|
|
execute(type, fs->device, fs->mountpt, interactive);
|
|
}
|
|
|
|
/*
|
|
* 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 != NULL);
|
|
|
|
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;
|
|
}
|
|
|
|
/*
|
|
* 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 *s;
|
|
int len;
|
|
|
|
if (!optlist)
|
|
return 0;
|
|
|
|
len = strlen(opt);
|
|
s = optlist - 1;
|
|
while (1) {
|
|
s = strstr(s + 1, opt);
|
|
if (!s)
|
|
return 0;
|
|
/* neither "opt.." nor "xxx,opt.."? */
|
|
if (s != optlist && s[-1] != ',')
|
|
continue;
|
|
/* neither "..opt" nor "..opt,xxx"? */
|
|
if (s[len] != '\0' && s[len] != ',')
|
|
continue;
|
|
return 1;
|
|
}
|
|
}
|
|
|
|
/* See if the filesystem matches the criteria given by the -t option */
|
|
static int fs_match(struct fs_info *fs)
|
|
{
|
|
int n, ret, checked_type;
|
|
char *cp;
|
|
|
|
if (!fs_type_list)
|
|
return 1;
|
|
|
|
ret = 0;
|
|
checked_type = 0;
|
|
n = 0;
|
|
while (1) {
|
|
cp = fs_type_list[n];
|
|
if (!cp)
|
|
break;
|
|
switch (fs_type_flag[n]) {
|
|
case FS_TYPE_FLAG_NORMAL:
|
|
checked_type++;
|
|
if (strcmp(cp, fs->type) == 0)
|
|
ret = 1;
|
|
break;
|
|
case FS_TYPE_FLAG_NEGOPT:
|
|
if (opt_in_list(cp, fs->opts))
|
|
return 0;
|
|
break;
|
|
case FS_TYPE_FLAG_OPT:
|
|
if (!opt_in_list(cp, fs->opts))
|
|
return 0;
|
|
break;
|
|
}
|
|
n++;
|
|
}
|
|
if (checked_type == 0)
|
|
return 1;
|
|
|
|
return (fs_type_negated ? !ret : ret);
|
|
}
|
|
|
|
/* Check if we should ignore this filesystem. */
|
|
static int ignore(struct fs_info *fs)
|
|
{
|
|
/*
|
|
* If the pass number is 0, ignore it.
|
|
*/
|
|
if (fs->passno == 0)
|
|
return 1;
|
|
|
|
/*
|
|
* If a specific fstype is specified, and it doesn't match,
|
|
* ignore it.
|
|
*/
|
|
if (!fs_match(fs))
|
|
return 1;
|
|
|
|
/* Are we ignoring this type? */
|
|
if (index_in_str_array(ignored_types, fs->type) >= 0)
|
|
return 1;
|
|
|
|
/* We can and want to check this file system type. */
|
|
return 0;
|
|
}
|
|
|
|
/* Check all file systems, using the /etc/fstab table. */
|
|
static int check_all(void)
|
|
{
|
|
struct fs_info *fs;
|
|
int status = EXIT_OK;
|
|
smallint not_done_yet;
|
|
smallint pass_done;
|
|
int passno;
|
|
|
|
if (verbose)
|
|
puts("Checking all filesystems");
|
|
|
|
/*
|
|
* 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 skip all root entries.
|
|
*/
|
|
if (skip_root)
|
|
for (fs = filesys_info; fs; fs = fs->next)
|
|
if (LONE_CHAR(fs->mountpt, '/'))
|
|
fs->flags |= FLAG_DONE;
|
|
|
|
not_done_yet = 1;
|
|
passno = 1;
|
|
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 = 1;
|
|
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)
|
|
puts("----------------------------------");
|
|
passno++;
|
|
} else
|
|
not_done_yet = 1;
|
|
}
|
|
kill_all_if_cancel_requested();
|
|
status |= wait_many(FLAG_WAIT_ATLEAST_ONE);
|
|
return status;
|
|
}
|
|
|
|
/*
|
|
* Deal with the fsck -t argument.
|
|
* Huh, for mount "-t novfat,nfs" means "neither vfat nor nfs"!
|
|
* Why here we require "-t novfat,nonfs" ??
|
|
*/
|
|
static void compile_fs_type(char *fs_type)
|
|
{
|
|
char *s;
|
|
int num = 2;
|
|
smallint negate;
|
|
|
|
if (fs_type) {
|
|
s = fs_type;
|
|
while ((s = strchr(s, ','))) {
|
|
num++;
|
|
s++;
|
|
}
|
|
}
|
|
|
|
fs_type_list = xzalloc(num * sizeof(fs_type_list[0]));
|
|
fs_type_flag = xzalloc(num * sizeof(fs_type_flag[0]));
|
|
fs_type_negated = -1; /* not yet known is it negated or not */
|
|
|
|
if (!fs_type)
|
|
return;
|
|
|
|
num = 0;
|
|
s = fs_type;
|
|
while (1) {
|
|
char *comma;
|
|
|
|
negate = 0;
|
|
if (s[0] == 'n' && s[1] == 'o') { /* "no.." */
|
|
s += 2;
|
|
negate = 1;
|
|
} else if (s[0] == '!') {
|
|
s++;
|
|
negate = 1;
|
|
}
|
|
|
|
if (strcmp(s, "loop") == 0)
|
|
/* loop is really short-hand for opts=loop */
|
|
goto loop_special_case;
|
|
if (strncmp(s, "opts=", 5) == 0) {
|
|
s += 5;
|
|
loop_special_case:
|
|
fs_type_flag[num] = negate ? FS_TYPE_FLAG_NEGOPT : FS_TYPE_FLAG_OPT;
|
|
} else {
|
|
if (fs_type_negated == -1)
|
|
fs_type_negated = negate;
|
|
if (fs_type_negated != negate)
|
|
bb_error_msg_and_die(
|
|
"either all or none of the filesystem types passed to -t must be prefixed "
|
|
"with 'no' or '!'");
|
|
}
|
|
comma = strchr(s, ',');
|
|
fs_type_list[num++] = comma ? xstrndup(s, comma-s) : xstrdup(s);
|
|
if (!comma)
|
|
break;
|
|
s = comma + 1;
|
|
}
|
|
}
|
|
|
|
static void parse_args(int argc, char *argv[])
|
|
{
|
|
int i, j;
|
|
char *arg, *tmp;
|
|
char *options = NULL;
|
|
int optpos = 0;
|
|
int opts_for_fsck = 0;
|
|
|
|
/* in bss, so already zeroed
|
|
num_devices = 0;
|
|
num_args = 0;
|
|
instance_list = NULL;
|
|
*/
|
|
|
|
/* TODO: getopt32 */
|
|
for (i = 1; i < argc; i++) {
|
|
arg = argv[i];
|
|
|
|
/* "/dev/blk" or "/path" or "UUID=xxx" or "LABEL=xxx" */
|
|
if ((arg[0] == '/' && !opts_for_fsck) || strchr(arg, '=')) {
|
|
// FIXME: must check that arg is a blkdev, or resolve
|
|
// "/path", "UUID=xxx" or "LABEL=xxx" into block device name
|
|
// ("UUID=xxx"/"LABEL=xxx" can probably shifted to fsck.auto duties)
|
|
devices = xrealloc(devices, (num_devices+1) * sizeof(devices[0]));
|
|
devices[num_devices++] = xstrdup(arg);
|
|
continue;
|
|
}
|
|
|
|
if (arg[0] != '-' || opts_for_fsck) {
|
|
args = xrealloc(args, (num_args+1) * sizeof(args[0]));
|
|
args[num_args++] = xstrdup(arg);
|
|
continue;
|
|
}
|
|
|
|
for (j = 1; arg[j]; j++) {
|
|
if (opts_for_fsck) {
|
|
optpos++;
|
|
/* one extra for '\0' */
|
|
options = xrealloc(options, optpos + 2);
|
|
options[optpos] = arg[j];
|
|
continue;
|
|
}
|
|
switch (arg[j]) {
|
|
case 'A':
|
|
doall = 1;
|
|
break;
|
|
#if DO_PROGRESS_INDICATOR
|
|
case 'C':
|
|
progress = 1;
|
|
if (arg[++j]) { /* -Cn */
|
|
progress_fd = xatoi_u(&arg[j]);
|
|
goto next_arg;
|
|
}
|
|
/* -C n */
|
|
progress_fd = xatoi_u(argv[++i]);
|
|
goto next_arg;
|
|
#endif
|
|
case 'V':
|
|
verbose++;
|
|
break;
|
|
case 'N':
|
|
noexecute = 1;
|
|
break;
|
|
case 'R':
|
|
skip_root = 1;
|
|
break;
|
|
case 'T':
|
|
notitle = 1;
|
|
break;
|
|
/* case 'M':
|
|
like_mount = 1;
|
|
break; */
|
|
case 'P':
|
|
parallel_root = 1;
|
|
break;
|
|
case 's':
|
|
serialize = 1;
|
|
break;
|
|
case 't':
|
|
if (fstype)
|
|
bb_show_usage();
|
|
if (arg[++j])
|
|
tmp = &arg[j];
|
|
else if (++i < argc)
|
|
tmp = argv[i];
|
|
else
|
|
bb_show_usage();
|
|
fstype = xstrdup(tmp);
|
|
compile_fs_type(fstype);
|
|
goto next_arg;
|
|
case '-':
|
|
opts_for_fsck++;
|
|
break;
|
|
case '?':
|
|
bb_show_usage();
|
|
break;
|
|
default:
|
|
optpos++;
|
|
/* one extra for '\0' */
|
|
options = xrealloc(options, optpos + 2);
|
|
options[optpos] = arg[j];
|
|
break;
|
|
}
|
|
}
|
|
next_arg:
|
|
if (optpos) {
|
|
options[0] = '-';
|
|
options[optpos + 1] = '\0';
|
|
args = xrealloc(args, (num_args+1) * sizeof(args[0]));
|
|
args[num_args++] = options;
|
|
optpos = 0;
|
|
options = NULL;
|
|
}
|
|
}
|
|
if (getenv("FSCK_FORCE_ALL_PARALLEL"))
|
|
force_all_parallel = 1;
|
|
tmp = getenv("FSCK_MAX_INST");
|
|
if (tmp)
|
|
max_running = xatoi(tmp);
|
|
}
|
|
|
|
static void signal_cancel(int sig ATTRIBUTE_UNUSED)
|
|
{
|
|
cancel_requested = 1;
|
|
}
|
|
|
|
int fsck_main(int argc, char *argv[]);
|
|
int fsck_main(int argc, char *argv[])
|
|
{
|
|
int i, status = 0;
|
|
int interactive;
|
|
const char *fstab;
|
|
struct fs_info *fs;
|
|
struct sigaction sa;
|
|
|
|
memset(&sa, 0, sizeof(sa));
|
|
sa.sa_handler = signal_cancel;
|
|
sigaction(SIGINT, &sa, 0);
|
|
sigaction(SIGTERM, &sa, 0);
|
|
|
|
setbuf(stdout, NULL);
|
|
|
|
parse_args(argc, argv);
|
|
|
|
if (!notitle)
|
|
puts("fsck (busybox "BB_VER", "BB_BT")");
|
|
|
|
/* Even plain "fsck /dev/hda1" needs fstab to get fs type,
|
|
* so we are scanning it anyway */
|
|
fstab = getenv("FSTAB_FILE");
|
|
if (!fstab)
|
|
fstab = "/etc/fstab";
|
|
load_fs_info(fstab);
|
|
|
|
interactive = (num_devices == 1) | serialize;
|
|
|
|
/* If -A was specified ("check all"), do that! */
|
|
if (doall)
|
|
return check_all();
|
|
|
|
if (num_devices == 0) {
|
|
serialize = 1;
|
|
interactive = 1;
|
|
return check_all();
|
|
}
|
|
|
|
for (i = 0; i < num_devices; i++) {
|
|
if (cancel_requested) {
|
|
kill_all_if_cancel_requested();
|
|
break;
|
|
}
|
|
|
|
fs = lookup(devices[i]);
|
|
if (!fs)
|
|
fs = create_fs_device(devices[i], 0, "auto", 0, -1, -1);
|
|
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)
|
|
puts("----------------------------------");
|
|
}
|
|
}
|
|
status |= wait_many(FLAG_WAIT_ALL);
|
|
return status;
|
|
}
|