[T106][ZXW-22]7520V3SCV2.01.01.02P42U09_VEC_V0.8_AP_VEC origin source commit
Change-Id: Ic6e05d89ecd62fc34f82b23dcf306c93764aec4b
diff --git a/ap/app/busybox/src/e2fsprogs/fsck.c b/ap/app/busybox/src/e2fsprogs/fsck.c
new file mode 100644
index 0000000..d32f396
--- /dev/null
+++ b/ap/app/busybox/src/e2fsprogs/fsck.c
@@ -0,0 +1,1096 @@
+/* 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;
+}