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busybox/e2fsprogs/fsck.c
Tim Riker c1ef7bdd8d just whitespace
2006-01-25 00:08:53 +00:00

1411 lines
28 KiB
C
Raw Blame History

/*
* pfsck --- A generic, parallelizing front-end for the fsck program.
* It will automatically try to run fsck programs in parallel if the
* devices are on separate spindles. It is based on the same ideas as
* the generic front end for fsck by David Engel and Fred van Kempen,
* but it has been completely rewritten from scratch to support
* parallel execution.
*
* Written by Theodore Ts'o, <tytso@mit.edu>
*
* Miquel van Smoorenburg (miquels@drinkel.ow.org) 20-Oct-1994:
* o Changed -t fstype to behave like with mount when -A (all file
* systems) or -M (like mount) is specified.
* o fsck looks if it can find the fsck.type program to decide
* if it should ignore the fs type. This way more fsck programs
* can be added without changing this front-end.
* o -R flag skip root file system.
*
* Copyright (C) 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000,
* 2001, 2002, 2003, 2004, 2005 by Theodore Ts'o.
*
* %Begin-Header%
* This file may be redistributed under the terms of the GNU Public
* License.
* %End-Header%
*/
#include <sys/types.h>
#include <sys/wait.h>
#include <sys/signal.h>
#include <sys/stat.h>
#include <limits.h>
#include <stdio.h>
#include <ctype.h>
#include <string.h>
#include <time.h>
#include <stdlib.h>
#include <errno.h>
#include <paths.h>
#include <unistd.h>
#include <errno.h>
#include <malloc.h>
#include <signal.h>
#include "fsck.h"
#include "blkid/blkid.h"
#include "e2fsbb.h"
#include "busybox.h"
#ifndef _PATH_MNTTAB
#define _PATH_MNTTAB "/etc/fstab"
#endif
/*
* fsck.h
*/
#ifndef DEFAULT_FSTYPE
#define DEFAULT_FSTYPE "ext2"
#endif
#define MAX_DEVICES 32
#define MAX_ARGS 32
/*
* Internal structure for mount tabel entries.
*/
struct fs_info {
char *device;
char *mountpt;
char *type;
char *opts;
int freq;
int passno;
int flags;
struct fs_info *next;
};
#define FLAG_DONE 1
#define FLAG_PROGRESS 2
/*
* Structure to allow exit codes to be stored
*/
struct fsck_instance {
int pid;
int flags;
int exit_status;
time_t start_time;
char * prog;
char * type;
char * device;
char * base_device;
struct fsck_instance *next;
};
/*
* base_device.c
*
* Return the "base device" given a particular device; this is used to
* assure that we only fsck one partition on a particular drive at any
* one time. Otherwise, the disk heads will be seeking all over the
* place. If the base device can not be determined, return NULL.
*
* The base_device() function returns an allocated string which must
* be freed.
*
*/
#ifdef CONFIG_FEATURE_DEVFS
/*
* Required for the uber-silly devfs /dev/ide/host1/bus2/target3/lun3
* pathames.
*/
static const char * const devfs_hier[] = {
"host", "bus", "target", "lun", 0
};
#endif
static char *base_device(const char *device)
{
char *str, *cp;
#ifdef CONFIG_FEATURE_DEVFS
const char * const *hier;
const char *disk;
int len;
#endif
cp = str = bb_xstrdup(device);
/* Skip over /dev/; if it's not present, give up. */
if (strncmp(cp, "/dev/", 5) != 0)
goto errout;
cp += 5;
#if 0 /* this is for old stuff no one uses anymore ? */
/* Skip over /dev/dsk/... */
if (strncmp(cp, "dsk/", 4) == 0)
cp += 4;
#endif
/*
* For md devices, we treat them all as if they were all
* on one disk, since we don't know how to parallelize them.
*/
if (cp[0] == 'm' && cp[1] == 'd') {
*(cp+2) = 0;
return str;
}
/* Handle DAC 960 devices */
if (strncmp(cp, "rd/", 3) == 0) {
cp += 3;
if (cp[0] != 'c' || cp[2] != 'd' ||
!isdigit(cp[1]) || !isdigit(cp[3]))
goto errout;
*(cp+4) = 0;
return str;
}
/* Now let's handle /dev/hd* and /dev/sd* devices.... */
if ((cp[0] == 'h' || cp[0] == 's') && (cp[1] == 'd')) {
cp += 2;
/* If there's a single number after /dev/hd, skip it */
if (isdigit(*cp))
cp++;
/* What follows must be an alpha char, or give up */
if (!isalpha(*cp))
goto errout;
*(cp + 1) = 0;
return str;
}
#ifdef CONFIG_FEATURE_DEVFS
/* Now let's handle devfs (ugh) names */
len = 0;
if (strncmp(cp, "ide/", 4) == 0)
len = 4;
if (strncmp(cp, "scsi/", 5) == 0)
len = 5;
if (len) {
cp += len;
/*
* Now we proceed down the expected devfs hierarchy.
* i.e., .../host1/bus2/target3/lun4/...
* If we don't find the expected token, followed by
* some number of digits at each level, abort.
*/
for (hier = devfs_hier; *hier; hier++) {
len = strlen(*hier);
if (strncmp(cp, *hier, len) != 0)
goto errout;
cp += len;
while (*cp != '/' && *cp != 0) {
if (!isdigit(*cp))
goto errout;
cp++;
}
cp++;
}
*(cp - 1) = 0;
return str;
}
/* Now handle devfs /dev/disc or /dev/disk names */
disk = 0;
if (strncmp(cp, "discs/", 6) == 0)
disk = "disc";
else if (strncmp(cp, "disks/", 6) == 0)
disk = "disk";
if (disk) {
cp += 6;
if (strncmp(cp, disk, 4) != 0)
goto errout;
cp += 4;
while (*cp != '/' && *cp != 0) {
if (!isdigit(*cp))
goto errout;
cp++;
}
*cp = 0;
return str;
}
#endif
errout:
free(str);
return NULL;
}
static const char * const ignored_types[] = {
"ignore",
"iso9660",
"nfs",
"proc",
"sw",
"swap",
"tmpfs",
"devpts",
NULL
};
static const char * const really_wanted[] = {
"minix",
"ext2",
"ext3",
"jfs",
"reiserfs",
"xiafs",
"xfs",
NULL
};
#define BASE_MD "/dev/md"
/*
* Global variables for options
*/
static char *devices[MAX_DEVICES];
static char *args[MAX_ARGS];
static int num_devices, num_args;
static int verbose;
static int doall;
static int noexecute;
static int serialize;
static int skip_root;
static int like_mount;
static int notitle;
static int parallel_root;
static int progress;
static int progress_fd;
static int force_all_parallel;
static int num_running;
static int max_running;
static volatile int cancel_requested;
static int kill_sent;
static char *fstype;
static struct fs_info *filesys_info, *filesys_last;
static struct fsck_instance *instance_list;
static char *fsck_path;
static blkid_cache cache;
static char *string_copy(const char *s)
{
char *ret;
if (!s)
return 0;
ret = strdup(s);
return ret;
}
static int string_to_int(const char *s)
{
long l;
char *p;
l = strtol(s, &p, 0);
if (*p || l == LONG_MIN || l == LONG_MAX || l < 0 || l > INT_MAX)
return -1;
else
return (int) l;
}
static char *skip_over_blank(char *cp)
{
while (*cp && isspace(*cp))
cp++;
return cp;
}
static char *skip_over_word(char *cp)
{
while (*cp && !isspace(*cp))
cp++;
return cp;
}
static void strip_line(char *line)
{
char *p;
while (*line) {
p = line + strlen(line) - 1;
if ((*p == '\n') || (*p == '\r'))
*p = 0;
else
break;
}
}
static char *parse_word(char **buf)
{
char *word, *next;
word = *buf;
if (*word == 0)
return 0;
word = skip_over_blank(word);
next = skip_over_word(word);
if (*next)
*next++ = 0;
*buf = next;
return word;
}
static void parse_escape(char *word)
{
char *q, c;
const char *p;
if (!word)
return;
for (p = q = word; *p; q++) {
c = *p++;
if (c != '\\') {
*q = c;
} else {
*q = bb_process_escape_sequence(&p);
}
}
*q = 0;
}
static void free_instance(struct fsck_instance *i)
{
if (i->prog)
free(i->prog);
if (i->device)
free(i->device);
if (i->base_device)
free(i->base_device);
free(i);
return;
}
static struct fs_info *create_fs_device(const char *device, const char *mntpnt,
const char *type, const char *opts,
int freq, int passno)
{
struct fs_info *fs;
if (!(fs = malloc(sizeof(struct fs_info))))
return NULL;
fs->device = string_copy(device);
fs->mountpt = string_copy(mntpnt);
fs->type = string_copy(type);
fs->opts = string_copy(opts ? opts : "");
fs->freq = freq;
fs->passno = passno;
fs->flags = 0;
fs->next = NULL;
if (!filesys_info)
filesys_info = fs;
else
filesys_last->next = fs;
filesys_last = fs;
return fs;
}
static int parse_fstab_line(char *line, struct fs_info **ret_fs)
{
char *dev, *device, *mntpnt, *type, *opts, *freq, *passno, *cp;
struct fs_info *fs;
*ret_fs = 0;
strip_line(line);
if ((cp = strchr(line, '#')))
*cp = 0; /* Ignore everything after the comment char */
cp = line;
device = parse_word(&cp);
mntpnt = parse_word(&cp);
type = parse_word(&cp);
opts = parse_word(&cp);
freq = parse_word(&cp);
passno = parse_word(&cp);
if (!device)
return 0; /* Allow blank lines */
if (!mntpnt || !type)
return -1;
parse_escape(device);
parse_escape(mntpnt);
parse_escape(type);
parse_escape(opts);
parse_escape(freq);
parse_escape(passno);
dev = blkid_get_devname(cache, device, NULL);
if (dev)
device = dev;
if (strchr(type, ','))
type = 0;
fs = create_fs_device(device, mntpnt, type ? type : "auto", opts,
freq ? atoi(freq) : -1,
passno ? atoi(passno) : -1);
if (dev)
free(dev);
if (!fs)
return -1;
*ret_fs = fs;
return 0;
}
static void interpret_type(struct fs_info *fs)
{
char *t;
if (strcmp(fs->type, "auto") != 0)
return;
t = blkid_get_tag_value(cache, "TYPE", fs->device);
if (t) {
free(fs->type);
fs->type = t;
}
}
/*
* Load the filesystem database from /etc/fstab
*/
static void load_fs_info(const char *filename)
{
FILE *f;
char buf[1024];
int lineno = 0;
int old_fstab = 1;
struct fs_info *fs;
if ((f = fopen(filename, "r")) == NULL) {
bb_perror_msg("WARNING: couldn't open %s", filename);
return;
}
while (!feof(f)) {
lineno++;
if (!fgets(buf, sizeof(buf), f))
break;
buf[sizeof(buf)-1] = 0;
if (parse_fstab_line(buf, &fs) < 0) {
bb_error_msg("WARNING: bad format "
"on line %d of %s\n", lineno, filename);
continue;
}
if (!fs)
continue;
if (fs->passno < 0)
fs->passno = 0;
else
old_fstab = 0;
}
fclose(f);
if (old_fstab) {
fputs("\007\007\007"
"WARNING: Your /etc/fstab does not contain the fsck passno\n"
" field. I will kludge around things for you, but you\n"
" should fix your /etc/fstab file as soon as you can.\n\n", stderr);
for (fs = filesys_info; fs; fs = fs->next) {
fs->passno = 1;
}
}
}
/* Lookup filesys in /etc/fstab and return the corresponding entry. */
static struct fs_info *lookup(char *filesys)
{
struct fs_info *fs;
/* No filesys name given. */
if (filesys == NULL)
return NULL;
for (fs = filesys_info; fs; fs = fs->next) {
if (!strcmp(filesys, fs->device) ||
(fs->mountpt && !strcmp(filesys, fs->mountpt)))
break;
}
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");
for(s = strtok(p, ":"); s; s = strtok(NULL, ":")) {
s = bb_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 = bb_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]);
printf("\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_perror_msg_and_die("%s", 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 = xcalloc(num, sizeof(char *));
cmp->type = xcalloc(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);
}
}
#if 0
printf("Adding %s to list (type %d).\n", s, cmp->type[num]);
#endif
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(compare_string_array(ignored_types, fs->type) >= 0)
return 1;
/* Do we really really want to check this fs? */
wanted = compare_string_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 (!strcmp(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 (!strcmp(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;
}
#if 0
static void usage(void)
{
fputs("Usage: fsck [-ANPRTV] [ -C [ fd ] ] [-t fstype] [fs-options] [filesys ...]\n", stderr);
exit(EXIT_USAGE);
}
#endif
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_error_msg_and_die("Couldn't open /proc/partitions: %m\n"
"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(
"Couldn't 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 &&
!strncmp(argv[i+1], "-", 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)
usage();
if (arg[j+1])
tmp = arg+j+1;
else if ((i+1) < argc)
tmp = argv[++i];
else
usage();
fstype = string_copy(tmp);
compile_fs_type(fstype, &fs_type_compiled);
goto next_arg;
case '-':
opts_for_fsck++;
break;
case '?':
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[])
{
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;
}
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