| /* 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 "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); |
| fs->type = xstrdup(type); |
| fs->opts = xstrdup(opts ? opts : ""); |
| 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, *passno, *cp; |
| struct fs_info *fs; |
| |
| *ret_fs = NULL; |
| strip_line(line); |
| *strchrnul(line, '#') = '\0'; /* Ignore everything after comment */ |
| 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(passno); |
| |
| if (strchr(type, ',')) |
| type = NULL; |
| |
| fs = create_fs_device(device, mntpnt, type ? type : "auto", opts, |
| (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) { |
| 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, 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(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; |
| } |
| |
| 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(args, (num_args+1) * sizeof(args[0])); |
| 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 ATTRIBUTE_UNUSED) |
| { |
| cancel_requested = 1; |
| } |
| |
| int fsck_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; |
| int fsck_main(int argc, 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; |
| } |