diff options
Diffstat (limited to 'release/src/router/busybox/e2fsprogs/fsck.c')
| -rw-r--r-- | release/src/router/busybox/e2fsprogs/fsck.c | 1085 |
1 files changed, 1085 insertions, 0 deletions
diff --git a/release/src/router/busybox/e2fsprogs/fsck.c b/release/src/router/busybox/e2fsprogs/fsck.c new file mode 100644 index 00000000..3c6cafbd --- /dev/null +++ b/release/src/router/busybox/e2fsprogs/fsck.c @@ -0,0 +1,1085 @@ +/* vi: set sw=4 ts=4: */ +/* + * fsck --- 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. + * + * Licensed under GPLv2, see file LICENSE in this tarball for details. + */ + +/* All filesystem specific hooks have been removed. + * If filesystem cannot be determined, we will execute + * "fsck.auto". Currently this also happens if you specify + * UUID=xxx or LABEL=xxx as an object to check. + * Detection code for that is also probably has to be in fsck.auto. + * + * In other words, this is _really_ is just a driver program which + * spawns actual fsck.something for each filesystem to check. + * It doesn't guess filesystem types from on-disk format. + */ + +#include "libbb.h" + +/* "progress indicator" code is somewhat buggy and ext[23] specific. + * We should be filesystem agnostic. IOW: there should be a well-defined + * API for fsck.something, NOT ad-hoc hacks in generic fsck. */ +#define DO_PROGRESS_INDICATOR 0 + +#define EXIT_OK 0 +#define EXIT_NONDESTRUCT 1 +#define EXIT_DESTRUCT 2 +#define EXIT_UNCORRECTED 4 +#define EXIT_ERROR 8 +#define EXIT_USAGE 16 +#define FSCK_CANCELED 32 /* Aborted with a signal or ^C */ + +/* + * Internal structure for mount table entries. + */ + +struct fs_info { + struct fs_info *next; + char *device; + char *mountpt; + char *type; + char *opts; + int passno; + int flags; +}; + +#define FLAG_DONE 1 +#define FLAG_PROGRESS 2 +/* + * Structure to allow exit codes to be stored + */ +struct fsck_instance { + struct fsck_instance *next; + int pid; + int flags; +#if DO_PROGRESS_INDICATOR + time_t start_time; +#endif + char *prog; + char *device; + char *base_device; /* /dev/hda for /dev/hdaN etc */ +}; + +static const char ignored_types[] ALIGN1 = + "ignore\0" + "iso9660\0" + "nfs\0" + "proc\0" + "sw\0" + "swap\0" + "tmpfs\0" + "devpts\0"; + +#if 0 +static const char really_wanted[] ALIGN1 = + "minix\0" + "ext2\0" + "ext3\0" + "jfs\0" + "reiserfs\0" + "xiafs\0" + "xfs\0"; +#endif + +#define BASE_MD "/dev/md" + +static char **devices; +static char **args; +static int num_devices; +static int num_args; +static int verbose; + +#define FS_TYPE_FLAG_NORMAL 0 +#define FS_TYPE_FLAG_OPT 1 +#define FS_TYPE_FLAG_NEGOPT 2 +static char **fs_type_list; +static uint8_t *fs_type_flag; +static smallint fs_type_negated; + +static volatile smallint cancel_requested; +static smallint doall; +static smallint noexecute; +static smallint serialize; +static smallint skip_root; +/* static smallint like_mount; */ +static smallint notitle; +static smallint parallel_root; +static smallint force_all_parallel; + +#if DO_PROGRESS_INDICATOR +static smallint progress; +static int progress_fd; +#endif + +static int num_running; +static int max_running; +static char *fstype; +static struct fs_info *filesys_info; +static struct fs_info *filesys_last; +static struct fsck_instance *instance_list; + +/* + * 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 cannot be determined, return NULL. + * + * The base_device() function returns an allocated string which must + * be freed. + */ +#if ENABLE_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", NULL +}; +#endif + +static char *base_device(const char *device) +{ + char *str, *cp; +#if ENABLE_FEATURE_DEVFS + const char *const *hier; + const char *disk; + int len; +#endif + cp = str = xstrdup(device); + + /* Skip over /dev/; if it's not present, give up. */ + if (strncmp(cp, "/dev/", 5) != 0) + goto errout; + cp += 5; + + /* + * 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' || !isdigit(cp[1]) + || cp[2] != 'd' || !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; + } + +#if ENABLE_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 void free_instance(struct fsck_instance *p) +{ + free(p->prog); + free(p->device); + free(p->base_device); + free(p); +} + +static struct fs_info *create_fs_device(const char *device, const char *mntpnt, + const char *type, const char *opts, + int passno) +{ + struct fs_info *fs; + + fs = xzalloc(sizeof(*fs)); + fs->device = xstrdup(device); + fs->mountpt = xstrdup(mntpnt); + if (strchr(type, ',')) + type = (char *)"auto"; + fs->type = xstrdup(type); + fs->opts = xstrdup(opts ? opts : ""); + fs->passno = passno < 0 ? 1 : passno; + /*fs->flags = 0; */ + /*fs->next = NULL; */ + + if (!filesys_info) + filesys_info = fs; + else + filesys_last->next = fs; + filesys_last = fs; + + return fs; +} + +/* Load the filesystem database from /etc/fstab */ +static void load_fs_info(const char *filename) +{ + FILE *fstab; + struct mntent mte; + struct fs_info *fs; + + fstab = setmntent(filename, "r"); + if (!fstab) { + bb_perror_msg("cannot read %s", filename); + return; + } + + // Loop through entries + while (getmntent_r(fstab, &mte, bb_common_bufsiz1, COMMON_BUFSIZE)) { + //bb_info_msg("CREATE[%s][%s][%s][%s][%d]", mte.mnt_fsname, mte.mnt_dir, + // mte.mnt_type, mte.mnt_opts, + // mte.mnt_passno); + fs = create_fs_device(mte.mnt_fsname, mte.mnt_dir, + mte.mnt_type, mte.mnt_opts, + mte.mnt_passno); + } + endmntent(fstab); +} + +/* Lookup filesys in /etc/fstab and return the corresponding entry. */ +static struct fs_info *lookup(char *filesys) +{ + struct fs_info *fs; + + for (fs = filesys_info; fs; fs = fs->next) { + if (strcmp(filesys, fs->device) == 0 + || (fs->mountpt && strcmp(filesys, fs->mountpt) == 0) + ) + break; + } + + return fs; +} + +#if DO_PROGRESS_INDICATOR +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; +} +#endif + + +/* + * Send a signal to all outstanding fsck child processes + */ +static void kill_all_if_cancel_requested(void) +{ + static smallint kill_sent; + + struct fsck_instance *inst; + + if (!cancel_requested || kill_sent) + return; + + for (inst = instance_list; inst; inst = inst->next) { + if (inst->flags & FLAG_DONE) + continue; + kill(inst->pid, SIGTERM); + } + kill_sent = 1; +} + +/* + * Wait for one child process to exit; when it does, unlink it from + * the list of executing child processes, free, and return its exit status. + * If there is no exited child, return -1. + */ +static int wait_one(int flags) +{ + int status; + int sig; + struct fsck_instance *inst, *prev; + pid_t pid; + + if (!instance_list) + return -1; + /* if (noexecute) { already returned -1; } */ + + while (1) { + pid = waitpid(-1, &status, flags); + kill_all_if_cancel_requested(); + if (pid == 0) /* flags == WNOHANG and no children exited */ + return -1; + if (pid < 0) { + if (errno == EINTR) + continue; + if (errno == ECHILD) { /* paranoia */ + bb_error_msg("wait: no more children"); + return -1; + } + bb_perror_msg("wait"); + continue; + } + prev = NULL; + inst = instance_list; + do { + if (inst->pid == pid) + goto child_died; + prev = inst; + inst = inst->next; + } while (inst); + } + child_died: + + if (WIFEXITED(status)) + status = WEXITSTATUS(status); + else if (WIFSIGNALED(status)) { + sig = WTERMSIG(status); + status = EXIT_UNCORRECTED; + if (sig != SIGINT) { + printf("Warning: %s %s terminated " + "by 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; + } + +#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 + + if (prev) + prev->next = inst->next; + else + instance_list = inst->next; + if (verbose > 1) + printf("Finished with %s (exit status %d)\n", + inst->device, status); + num_running--; + free_instance(inst); + + return status; +} + +/* + * Wait until all executing child processes have exited; return the + * logical OR of all of their exit code values. + */ +#define FLAG_WAIT_ALL 0 +#define FLAG_WAIT_ATLEAST_ONE WNOHANG +static int wait_many(int flags) +{ + int exit_status; + int global_status = 0; + int wait_flags = 0; + + while ((exit_status = wait_one(wait_flags)) != -1) { + global_status |= exit_status; + wait_flags |= flags; + } + 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; + + 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++] = (char*)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]); + bb_putchar('\n'); + } + + /* Fork and execute the correct program. */ + pid = -1; + if (!noexecute) { + pid = spawn(argv); + if (pid < 0) + bb_simple_perror_msg(argv[0]); + } + +#if DO_PROGRESS_INDICATOR + free(argv[num_args + 1]); +#endif + + /* No child, so don't record an instance */ + if (pid <= 0) { + free(argv[0]); + return; + } + + inst = xzalloc(sizeof(*inst)); + inst->pid = pid; + inst->prog = argv[0]; + inst->device = xstrdup(device); + inst->base_device = base_device(device); +#if DO_PROGRESS_INDICATOR + inst->start_time = time(NULL); +#endif + + /* 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_strings(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, '/')) { + 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; + break; + } + } + } + /* + * This is for the bone-headed user who has root + * filesystem listed 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 didn'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; + + 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 */ + + 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(char **argv) +{ + int i, j; + char *arg, *tmp; + char *options; + int optpos; + int opts_for_fsck = 0; + + /* in bss, so already zeroed + num_devices = 0; + num_args = 0; + instance_list = NULL; + */ + + for (i = 1; argv[i]; 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_vector(devices, 2, num_devices); + devices[num_devices++] = xstrdup(arg); + continue; + } + + if (arg[0] != '-' || opts_for_fsck) { + args = xrealloc_vector(args, 2, num_args); + args[num_args++] = xstrdup(arg); + continue; + } + + if (LONE_CHAR(arg + 1, '-')) { /* "--" ? */ + opts_for_fsck = 1; + continue; + } + + optpos = 0; + options = NULL; + for (j = 1; arg[j]; j++) { + 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 */ + if (!argv[++i]) bb_show_usage(); + 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 (argv[++i]) + tmp = argv[i]; + else + bb_show_usage(); + fstype = xstrdup(tmp); + compile_fs_type(fstype); + goto next_arg; + 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_vector(args, 2, num_args); + args[num_args++] = options; + } + } + 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 UNUSED_PARAM) +{ + cancel_requested = 1; +} + +int fsck_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; +int fsck_main(int argc UNUSED_PARAM, char **argv) +{ + int i, status; + /*int interactive;*/ + const char *fstab; + struct fs_info *fs; + + /* we want wait() to be interruptible */ + signal_no_SA_RESTART_empty_mask(SIGINT, signal_cancel); + signal_no_SA_RESTART_empty_mask(SIGTERM, signal_cancel); + + setbuf(stdout, NULL); + + parse_args(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 (num_devices == 0) + /*interactive =*/ serialize = doall = 1; + if (doall) + return check_all(); + + status = 0; + 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], "", "auto", NULL, -1); + fsck_device(fs /*, interactive */); + + if (serialize + || (max_running && (num_running >= max_running)) + ) { + int exit_status = wait_one(0); + if (exit_status >= 0) + status |= exit_status; + if (verbose > 1) + puts("----------------------------------"); + } + } + status |= wait_many(FLAG_WAIT_ALL); + return status; +} |