/* 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 source tree. */ /* 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. */ //usage:#define fsck_trivial_usage //usage: "[-ANPRTV] [-C FD] [-t FSTYPE] [FS_OPTS] [BLOCKDEV]..." //usage:#define fsck_full_usage "\n\n" //usage: "Check and repair filesystems\n" //usage: "\n -A Walk /etc/fstab and check all filesystems" //usage: "\n -N Don't execute, just show what would be done" //usage: "\n -P With -A, check filesystems in parallel" //usage: "\n -R With -A, skip the root filesystem" //usage: "\n -T Don't show title on startup" //usage: "\n -V Verbose" //usage: "\n -C n Write status information to specified filedescriptor" //usage: "\n -t TYPE List of filesystem types to check" #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 /* fsck 1.41.4 (27-Jan-2009) manpage says: * 0 - No errors * 1 - File system errors corrected * 2 - System should be rebooted * 4 - File system errors left uncorrected * 8 - Operational error * 16 - Usage or syntax error * 32 - Fsck canceled by user request * 128 - Shared library error */ #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 **args; 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 smallint noexecute; static smallint serialize; static smallint skip_root; /* static smallint like_mount; */ 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 str = xstrdup(device); /* Skip over "/dev/"; if it's not present, give up */ cp = skip_dev_pfx(str); if (cp == str) goto errout; /* * 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; fstab = setmntent(filename, "r"); if (!fstab) { bb_perror_msg("can't 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); 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_got_signal(void) { static smallint kill_sent; struct fsck_instance *inst; if (!bb_got_signal || 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_got_signal(); 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 */) { int i; struct fsck_instance *inst; pid_t pid; args[0] = xasprintf("fsck.%s", type); #if DO_PROGRESS_INDICATOR if (progress && !progress_active()) { if (strcmp(type, "ext2") == 0 || strcmp(type, "ext3") == 0 ) { args[XXX] = xasprintf("-C%d", progress_fd); /* 1 */ inst->flags |= FLAG_PROGRESS; } } #endif args[num_args - 2] = (char*)device; /* args[num_args - 1] = NULL; - already is */ if (verbose || noexecute) { printf("[%s (%d) -- %s]", args[0], num_running, mntpt ? mntpt : device); for (i = 0; args[i]; i++) printf(" %s", args[i]); bb_putchar('\n'); } /* Fork and execute the correct program. */ pid = -1; if (!noexecute) { pid = spawn(args); if (pid < 0) bb_simple_perror_msg(args[0]); } #if DO_PROGRESS_INDICATOR free(args[XXX]); #endif /* No child, so don't record an instance */ if (pid <= 0) { free(args[0]); return; } inst = xzalloc(sizeof(*inst)); inst->pid = pid; inst->prog = args[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 (bb_got_signal) 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 (bb_got_signal) 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_got_signal(); 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 char **new_args(void) { args = xrealloc_vector(args, 2, num_args); return &args[num_args++]; } int fsck_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; int fsck_main(int argc UNUSED_PARAM, char **argv) { int i, status; /*int interactive;*/ struct fs_info *fs; const char *fstab; char *tmp; char **devices; int num_devices; smallint opts_for_fsck; smallint doall; smallint notitle; /* we want wait() to be interruptible */ signal_no_SA_RESTART_empty_mask(SIGINT, record_signo); signal_no_SA_RESTART_empty_mask(SIGTERM, record_signo); setbuf(stdout, NULL); opts_for_fsck = doall = notitle = 0; devices = NULL; num_devices = 0; new_args(); /* args[0] = NULL, will be replaced by fsck.<type> */ /* instance_list = NULL; - in bss, so already zeroed */ while (*++argv) { int j; int optpos; char *options; char *arg = *argv; /* "/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++] = arg; continue; } if (arg[0] != '-' || opts_for_fsck) { *new_args() = 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_positive(&arg[j]); goto next_arg; } /* -C n */ if (!*++argv) bb_show_usage(); progress_fd = xatoi_positive(*argv); 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) tmp = *argv; 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'; *new_args() = options; } } if (getenv("FSCK_FORCE_ALL_PARALLEL")) force_all_parallel = 1; tmp = getenv("FSCK_MAX_INST"); if (tmp) max_running = xatoi(tmp); new_args(); /* args[num_args - 2] will be replaced by <device> */ new_args(); /* args[num_args - 1] is the last, NULL element */ 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 (bb_got_signal) { kill_all_if_got_signal(); 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; }