put small subset of e2fsprogs back in the tree:

lsattr, chattr, fsck. Old e2fsprogs tree is in
e2fsprogs/old_e2fsprogs/*.

1 files changed, 1319 insertions, 0 deletions

diff --git a/e2fsprogs/fsck.c b/e2fsprogs/fsck.c
new file mode 100644
index 000000000..d59206ca2
--- /dev/null
+++ b/e2fsprogs/fsck.c
@@ -0,0 +1,1319 @@
+/* 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%
+ */
+
+#include "busybox.h"
+/*#include "e2fs_lib.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 */
+
+#ifndef DEFAULT_FSTYPE
+#define DEFAULT_FSTYPE	"ext2"
+#endif
+
+#define MAX_DEVICES 32
+#define MAX_ARGS 32
+
+/*
+ * Internal structure for mount tabel entries.
+ */
+
+struct fs_info {
+	char	*device;
+	char	*mountpt;
+	char	*type;
+	char	*opts;
+	int	freq;
+	int	passno;
+	int	flags;
+	struct fs_info *next;
+};
+
+#define FLAG_DONE 1
+#define FLAG_PROGRESS 2
+/*
+ * Structure to allow exit codes to be stored
+ */
+struct fsck_instance {
+	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 */
+	struct fsck_instance *next;
+};
+
+static const char * const ignored_types[] = {
+	"ignore",
+	"iso9660",
+	"nfs",
+	"proc",
+	"sw",
+	"swap",
+	"tmpfs",
+	"devpts",
+	NULL
+};
+
+static const char * const really_wanted[] = {
+	"minix",
+	"ext2",
+	"ext3",
+	"jfs",
+	"reiserfs",
+	"xiafs",
+	"xfs",
+	NULL
+};
+
+#define BASE_MD "/dev/md"
+
+/*
+ * Global variables for options
+ */
+static char **devices;
+static char **args;
+static int num_devices, num_args;
+
+static int verbose;
+static int doall;
+static int noexecute;
+static int serialize;
+static int skip_root;
+static int like_mount;
+static int notitle;
+static int parallel_root;
+static int progress;
+static int progress_fd;
+static int force_all_parallel;
+static int num_running;
+static int max_running;
+static volatile int cancel_requested;
+static int kill_sent;
+static char *fstype;
+static struct fs_info *filesys_info, *filesys_last;
+static struct fsck_instance *instance_list;
+/*static char *fsck_path;*/
+/*static blkid_cache cache;*/
+
+#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 int fs_type_negated;
+
+/*
+ * 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 *dev;*/
+	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);
+
+	/*
+	dev = blkid_get_devname(cache, device, NULL);
+	if (dev)
+		device = dev;*/
+
+	if (strchr(type, ','))
+		type = NULL;
+
+	fs = create_fs_device(device, mntpnt, type ? type : "auto", opts,
+			      freq ? atoi(freq) : -1,
+			      passno ? atoi(passno) : -1);
+	/*if (dev)
+		free(dev);*/
+
+	*ret_fs = fs;
+	return 0;
+}
+
+#if 0
+static void interpret_type(struct fs_info *fs)
+{
+	char *t;
+
+	if (strcmp(fs->type, "auto") != 0)
+		return;
+	t = blkid_get_tag_value(cache, "TYPE", fs->device);
+	if (t) {
+		free(fs->type);
+		fs->type = t;
+	}
+}
+#endif
+#define interpret_type(fs) ((void)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\n", lineno, filename);
+			continue;
+		}
+		if (!fs)
+			continue;
+		if (fs->passno < 0)
+			fs->passno = 0;
+		else
+			old_fstab = 0;
+	}
+	fclose(f);
+
+	if (old_fstab) {
+		fputs("\007\007\007"
+		"WARNING: Your /etc/fstab does not contain the fsck passno\n"
+		"       field.  I will kludge around things for you, but you\n"
+		"       should fix 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;
+
+	/* No filesys name given. */
+	if (filesys == NULL)
+		return NULL;
+
+	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 0
+/* Find fsck program for a given fs type. */
+static char *find_fsck(char *type)
+{
+	char *s;
+	const char *tpl;
+	char *p = xstrdup(fsck_path);
+	struct stat st;
+
+	/* Are we looking for a program or just a type? */
+	tpl = (strncmp(type, "fsck.", 5) ? "%s/fsck.%s" : "%s/%s");
+
+	for (s = strtok(p, ":"); s; s = strtok(NULL, ":")) {
+		s = xasprintf(tpl, s, type);
+		if (stat(s, &st) == 0)
+			break;
+		free(s);
+	}
+	free(p);
+	return s;
+}
+#endif
+
+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;
+}
+
+/*
+ * Execute a particular fsck program, and link it into the list of
+ * child processes we are waiting for.
+ */
+static int 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, *p;
+	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 (progress && !progress_active()) {
+		if (strcmp(type, "ext2") == 0
+		 || strcmp(type, "ext3") == 0
+		) {
+			argv[argc++] = xasprintf("-C%d", progress_fd); /* 1 */
+			inst->flags |= FLAG_PROGRESS;
+		}
+	}
+
+	argv[argc++] = xstrdup(device); /* 1 */
+	argv[argc] = 0; /* 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. */
+	if (noexecute)
+		pid = -1;
+	else if ((pid = fork()) < 0) {
+		bb_perror_msg("fork");
+		return errno;
+	}
+	if (pid == 0) {
+		/* Child */
+		if (!interactive)
+			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(0);
+	inst->next = NULL;
+
+	/*
+	 * Find the end of the list, so we add the instance on at the end.
+	 */
+	if (!instance_list) {
+		instance_list = inst;
+		return 0;
+	}
+	p = instance_list;
+	while (p->next)
+		p = p->next;
+	p->next = inst;
+	return 0;
+}
+
+/*
+ * Send a signal to all outstanding fsck child processes
+ */
+static int kill_all(int signum)
+{
+	struct fsck_instance *inst;
+	int     n = 0;
+
+	for (inst = instance_list; inst; inst = inst->next) {
+		if (inst->flags & FLAG_DONE)
+			continue;
+		kill(inst->pid, signum);
+		n++;
+	}
+	return n;
+}
+
+/*
+ * 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, *inst2, *prev;
+	pid_t pid;
+
+	if (!instance_list)
+		return NULL;
+
+	if (noexecute) {
+		inst = instance_list;
+		prev = 0;
+#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);
+		if (cancel_requested && !kill_sent) {
+			kill_all(SIGTERM);
+			kill_sent++;
+		}
+		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;
+			}
+			perror("wait");
+			continue;
+		}
+		for (prev = 0, inst = instance_list;
+		     inst;
+		     prev = inst, inst = inst->next) {
+			if (inst->pid == pid)
+				break;
+		}
+	} while (!inst);
+
+	if (WIFEXITED(status))
+		status = WEXITSTATUS(status);
+	else if (WIFSIGNALED(status)) {
+		sig = WTERMSIG(status);
+		if (sig == SIGINT) {
+			status = EXIT_UNCORRECTED;
+		} else {
+			printf("Warning... %s for device %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 (progress && (inst->flags & FLAG_PROGRESS) &&
+	    !progress_active()) {
+		for (inst2 = instance_list; inst2; inst2 = inst2->next) {
+			if (inst2->flags & FLAG_DONE)
+				continue;
+			if (strcmp(inst2->type, "ext2") &&
+			    strcmp(inst2->type, "ext3"))
+				continue;
+			/*
+			 * 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(0)+2) {
+				if (fork() == 0) {
+					sleep(1);
+					kill(inst2->pid, SIGUSR1);
+					exit(0);
+				}
+			} else
+				kill(inst2->pid, SIGUSR1);
+			inst2->flags |= FLAG_PROGRESS;
+			break;
+		}
+	}
+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;
+}
+
+/*
+ * 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 DEFAULT_FSTYPE.
+ */
+static void fsck_device(struct fs_info *fs, int interactive)
+{
+	const char *type;
+	int retval;
+
+	interpret_type(fs);
+
+	if (strcmp(fs->type, "auto") != 0)
+		type = fs->type;
+	else if (fstype
+	 && strncmp(fstype, "no", 2)
+	 && strncmp(fstype, "opts=", 5) && strncmp(fstype, "loop", 4)
+	 && !strchr(fstype, ',')
+	)
+		type = fstype;
+	else
+		type = DEFAULT_FSTYPE;
+
+	num_running++;
+	retval = execute(type, fs->device, fs->mountpt, interactive);
+	if (retval) {
+		bb_error_msg("error %d while executing fsck.%s for %s",
+						retval, type, fs->device);
+		num_running--;
+	}
+}
+
+/*
+ * Deal with the fsck -t argument.
+ */
+static void compile_fs_type(char *fs_type)
+{
+	char *cp, *list, *s;
+	int num = 2;
+	int negate;
+
+	if (fs_type) {
+		cp = fs_type;
+		while ((cp = strchr(cp, ','))) {
+			num++;
+			cp++;
+		}
+	}
+
+	fs_type_list = xzalloc(num * sizeof(fs_type_list[0]));
+	fs_type_flag = xzalloc(num * sizeof(fs_type_flag[0]));
+	fs_type_negated = -1;
+
+	if (!fs_type)
+		return;
+
+	list = xstrdup(fs_type);
+	num = 0;
+	s = strtok(list, ",");
+	while (s) {
+		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\n"
+"with 'no' or '!'.");
+		}
+		fs_type_list[num++] = xstrdup(s);
+		s = strtok(NULL, ",");
+	}
+	free(list);
+}
+
+/*
+ * 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    *list, *s;
+
+	if (!optlist)
+		return 0;
+	list = xstrdup(optlist);
+
+	s = strtok(list, ",");
+	while(s) {
+		if (strcmp(s, opt) == 0) {
+			free(list);
+			return 1;
+		}
+		s = strtok(NULL, ",");
+	}
+	free(list);
+	return 0;
+}
+
+/* See if the filesystem matches the criteria given by the -t option */
+static int fs_match(struct fs_info *fs)
+{
+	int n, ret = 0, checked_type = 0;
+	char *cp;
+
+	if (!fs_type_list)
+		return 1;
+
+	for (n = 0; (cp = fs_type_list[n]); n++) {
+		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;
+		}
+	}
+	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;
+
+	interpret_type(fs);
+
+	/*
+	 * 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;
+#if 0
+	/* Do we really really want to check this fs? */
+	wanted = index_in_str_array(really_wanted, fs->type) >= 0;
+
+	/* See if the <fsck.fs> program is available. */
+	s = find_fsck(fs->type);
+	if (s == NULL) {
+		if (wanted)
+			bb_error_msg("cannot check %s: fsck.%s not found",
+				fs->device, fs->type);
+		return 1;
+	}
+	free(s);
+#endif
+	/* We can and want to check this file system type. */
+	return 0;
+}
+
+/*
+ * 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 != 0);
+
+	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;
+}
+
+/* Check all file systems, using the /etc/fstab table. */
+static int check_all(void)
+{
+	struct fs_info *fs = NULL;
+	int status = EXIT_OK;
+	int not_done_yet = 1;
+	int passno = 1;
+	int pass_done;
+
+	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 skep all root entries.
+	 */
+	if (skip_root)
+		for (fs = filesys_info; fs; fs = fs->next)
+			if (LONE_CHAR(fs->mountpt, '/'))
+				fs->flags |= FLAG_DONE;
+
+	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++;
+				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++;
+	}
+	if (cancel_requested && !kill_sent) {
+		kill_all(SIGTERM);
+		kill_sent++;
+	}
+	status |= wait_many(FLAG_WAIT_ATLEAST_ONE);
+	return status;
+}
+
+static void signal_cancel(int sig ATTRIBUTE_UNUSED)
+{
+	cancel_requested++;
+}
+
+static int string_to_int(const char *s)
+{
+	int n;
+
+	if (!s) bb_show_usage();
+	n = bb_strtou(s, NULL, 0);
+	if (errno || n < 0) bb_show_usage();
+	return n;
+}
+
+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;
+	struct sigaction sa;
+
+	/*
+	 * Set up signal action
+	 */
+	memset(&sa, 0, sizeof(sa));
+	sa.sa_handler = signal_cancel;
+	sigaction(SIGINT, &sa, 0);
+	sigaction(SIGTERM, &sa, 0);
+
+	num_devices = 0;
+	num_args = 0;
+	instance_list = 0;
+
+/* TODO: getopt32 */
+	for (i = 1; i < argc; i++) {
+		arg = argv[i];
+		if ((arg[0] == '/' && !opts_for_fsck) || strchr(arg, '=')) {
+			if (num_devices >= MAX_DEVICES) {
+				bb_error_msg_and_die("too many devices");
+			}
+#if 0
+			char *dev;
+			dev = blkid_get_devname(cache, arg, NULL);
+			if (!dev && strchr(arg, '=')) {
+				/*
+				 * Check to see if we failed because
+				 * /proc/partitions isn't found.
+				 */
+				if (access("/proc/partitions", R_OK) < 0) {
+					bb_perror_msg_and_die("cannot open /proc/partitions "
+							"(is /proc mounted?)");
+				}
+				/*
+				 * Check to see if this is because
+				 * we're not running as root
+				 */
+				if (geteuid())
+					bb_error_msg_and_die(
+		"must be root to scan for matching filesystems: %s\n", arg);
+				else
+					bb_error_msg_and_die(
+		"cannot find matching filesystem: %s", arg);
+			}
+			devices = xrealloc(devices, (num_devices+1) * sizeof(devices[0]));
+			devices[num_devices++] = dev ? dev : xstrdup(arg);
+#endif
+			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++;
+				break;
+			case 'C':
+				progress++;
+				if (arg[++j]) { /* -Cn */
+					progress_fd = string_to_int(&arg[j]);
+					goto next_arg;
+				}
+				/* -C n */
+				progress_fd = string_to_int(argv[++i]);
+				goto next_arg;
+			case 'V':
+				verbose++;
+				break;
+			case 'N':
+				noexecute++;
+				break;
+			case 'R':
+				skip_root++;
+				break;
+			case 'T':
+				notitle++;
+				break;
+			case 'M':
+				like_mount++;
+				break;
+			case 'P':
+				parallel_root++;
+				break;
+			case 's':
+				serialize++;
+				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++;
+	tmp = getenv("FSCK_MAX_INST");
+	if (tmp)
+		max_running = xatoi(tmp);
+}
+
+int fsck_main(int argc, char *argv[])
+{
+	int i, status = 0;
+	int interactive = 0;
+	const char *fstab;
+	struct fs_info *fs;
+
+	setbuf(stdout, NULL);
+	/*setvbuf(stdout, NULL, _IONBF, BUFSIZ);*/
+	/*setvbuf(stderr, NULL, _IONBF, BUFSIZ);*/
+
+	/*blkid_get_cache(&cache, NULL);*/
+	parse_args(argc, argv);
+
+	if (!notitle)
+		puts("fsck (busybox "BB_VER", "BB_BT")");
+
+	fstab = getenv("FSTAB_FILE");
+	if (!fstab)
+		fstab = "/etc/fstab";
+	load_fs_info(fstab);
+
+	/*fsck_path = e2fs_set_sbin_path();*/
+
+	if (num_devices == 1 || serialize)
+		interactive = 1;
+
+	/* If -A was specified ("check all"), do that! */
+	if (doall)
+		return check_all();
+
+	if (num_devices == 0) {
+		serialize++;
+		interactive++;
+		return check_all();
+	}
+
+	for (i = 0 ; i < num_devices; i++) {
+		if (cancel_requested) {
+			if (!kill_sent) {
+				kill_all(SIGTERM);
+				kill_sent++;
+			}
+			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);
+	/*blkid_put_cache(cache);*/
+	return status;
+}