/* 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. * * %Begin-Header% * This file may be redistributed under the terms of the GNU Public * License. * %End-Header% */ /* 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 "busybox.h" #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 freq; 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; int exit_status; time_t start_time; char *prog; char *type; char *device; char *base_device; /* /dev/hda for /dev/hdaN etc */ }; static const char *const ignored_types[] = { "ignore", "iso9660", "nfs", "proc", "sw", "swap", "tmpfs", "devpts", NULL }; #if 0 static const char *const really_wanted[] = { "minix", "ext2", "ext3", "jfs", "reiserfs", "xiafs", "xfs", NULL }; #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; /* "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 #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 freq, int passno) { struct fs_info *fs; fs = xzalloc(sizeof(*fs)); fs->device = xstrdup(device); fs->mountpt = xstrdup(mntpnt); fs->type = xstrdup(type); fs->opts = xstrdup(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 void strip_line(char *line) { char *p = line + strlen(line) - 1; while (*line) { if (*p != '\n' && *p != '\r') break; *p-- = '\0'; } } static char *parse_word(char **buf) { char *word, *next; word = *buf; if (*word == '\0') return NULL; word = skip_whitespace(word); next = skip_non_whitespace(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 int parse_fstab_line(char *line, struct fs_info **ret_fs) { char *device, *mntpnt, *type, *opts, *freq, *passno, *cp; struct fs_info *fs; *ret_fs = 0; strip_line(line); cp = strchr(line, '#'); if (cp) *cp = '\0'; /* Ignore everything after the comment char */ cp = line; device = parse_word(&cp); if (!device) return 0; /* Allow blank lines */ mntpnt = parse_word(&cp); type = parse_word(&cp); opts = parse_word(&cp); freq = parse_word(&cp); passno = parse_word(&cp); if (!mntpnt || !type) return -1; parse_escape(device); parse_escape(mntpnt); parse_escape(type); parse_escape(opts); parse_escape(freq); parse_escape(passno); if (strchr(type, ',')) type = NULL; fs = create_fs_device(device, mntpnt, type ? type : "auto", opts, freq ? atoi(freq) : -1, passno ? atoi(passno) : -1); *ret_fs = fs; return 0; } /* Load the filesystem database from /etc/fstab */ static void load_fs_info(const char *filename) { FILE *f; int lineno = 0; int old_fstab = 1; struct fs_info *fs; f = fopen_or_warn(filename, "r"); if (f == NULL) { /*bb_perror_msg("WARNING: cannot open %s", filename);*/ return; } while (1) { int r; char *buf = xmalloc_getline(f); if (!buf) break; r = parse_fstab_line(buf, &fs); free(buf); lineno++; if (r < 0) { bb_error_msg("WARNING: bad format " "on line %d of %s", lineno, filename); continue; } if (!fs) continue; if (fs->passno < 0) fs->passno = 0; else old_fstab = 0; } fclose(f); if (old_fstab) { fputs("\007" "WARNING: Your /etc/fstab does not contain the fsck passno field.\n" "I will kludge around things for you, but you should fix\n" "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; 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, and return it. */ static struct fsck_instance *wait_one(int flags) { int status; int sig; struct fsck_instance *inst, *prev; pid_t pid; if (!instance_list) return NULL; if (noexecute) { inst = instance_list; prev = NULL; #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); kill_all_if_cancel_requested(); 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; } bb_perror_msg("wait"); continue; } prev = NULL; inst = instance_list; while (inst) { if (inst->pid == pid) break; prev = inst; inst = inst->next; } } 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", 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) { pid = fork(); /* TODO: NOMMU friendly way (vfork)? */ 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); } 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 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; }