import the very fat e2fsck/fsck applets

1 files changed, 1179 insertions, 0 deletions

diff --git a/e2fsprogs/e2fsck.c b/e2fsprogs/e2fsck.c
new file mode 100644
index 000000000..f1adc8549
--- /dev/null
+++ b/e2fsprogs/e2fsck.c
@@ -0,0 +1,1179 @@
+/*
+ * unix.c - The unix-specific code for e2fsck
+ * 
+ * Copyright (C) 1993, 1994, 1995, 1996, 1997 Theodore Ts'o.
+ *
+ * %Begin-Header%
+ * This file may be redistributed under the terms of the GNU Public
+ * License.
+ * %End-Header%
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <fcntl.h>
+#include <ctype.h>
+#include <time.h>
+#ifdef HAVE_SIGNAL_H
+#include <signal.h>
+#endif
+#ifdef HAVE_GETOPT_H
+#include <getopt.h>
+#else
+extern char *optarg;
+extern int optind;
+#endif
+#include <unistd.h>
+#ifdef HAVE_ERRNO_H
+#include <errno.h>
+#endif
+#ifdef HAVE_MNTENT_H
+#include <mntent.h>
+#endif
+#ifdef HAVE_SYS_IOCTL_H
+#include <sys/ioctl.h>
+#endif
+#ifdef HAVE_MALLOC_H
+#include <malloc.h>
+#endif
+#ifdef HAVE_SYS_TYPES_H
+#include <sys/types.h>
+#endif
+#ifdef HAVE_DIRENT_H
+#include <dirent.h>
+#endif
+
+#include "e2fsbb.h"
+#include "et/com_err.h"
+#include "e2fsck/e2fsck.h"
+#include "e2fsck/problem.h"
+//#include "../version.h"
+
+/* Command line options */
+static int swapfs;
+#ifdef ENABLE_SWAPFS
+static int normalize_swapfs;
+#endif
+static int cflag;		/* check disk */
+static int show_version_only;
+static int verbose;
+
+static int replace_bad_blocks;
+static int keep_bad_blocks;
+static char *bad_blocks_file;
+
+e2fsck_t e2fsck_global_ctx;	/* Try your very best not to use this! */
+
+#ifdef __CONFIG_JBD_DEBUG__E2FS		/* Enabled by configure --enable-jfs-debug */
+int journal_enable_debug = -1;
+#endif
+
+#if 0
+static void usage(e2fsck_t ctx)
+{
+	fprintf(stderr,
+		_("Usage: %s [-panyrcdfvstDFSV] [-b superblock] [-B blocksize]\n"
+		"\t\t[-I inode_buffer_blocks] [-P process_inode_size]\n"
+		"\t\t[-l|-L bad_blocks_file] [-C fd] [-j ext-journal]\n"
+		"\t\t[-E extended-options] device\n"),
+		ctx->program_name);
+
+	fprintf(stderr, _("\nEmergency help:\n"
+		" -p                   Automatic repair (no questions)\n"
+		" -n                   Make no changes to the filesystem\n"
+		" -y                   Assume \"yes\" to all questions\n"
+		" -c                   Check for bad blocks and add them to the badblock list\n"
+		" -f                   Force checking even if filesystem is marked clean\n"));
+	fprintf(stderr, _(""
+		" -v                   Be verbose\n"
+		" -b superblock        Use alternative superblock\n"
+		" -B blocksize         Force blocksize when looking for superblock\n"
+		" -j external-journal  Set location of the external journal\n"
+		" -l bad_blocks_file   Add to badblocks list\n"
+		" -L bad_blocks_file   Set badblocks list\n"
+		));
+
+	exit(FSCK_USAGE);
+}
+#endif
+
+static void show_stats(e2fsck_t	ctx)
+{
+	ext2_filsys fs = ctx->fs;
+	int inodes, inodes_used, blocks, blocks_used;
+	int dir_links;
+	int num_files, num_links;
+	int frag_percent;
+
+	dir_links = 2 * ctx->fs_directory_count - 1;
+	num_files = ctx->fs_total_count - dir_links;
+	num_links = ctx->fs_links_count - dir_links;
+	inodes = fs->super->s_inodes_count;
+	inodes_used = (fs->super->s_inodes_count -
+		       fs->super->s_free_inodes_count);
+	blocks = fs->super->s_blocks_count;
+	blocks_used = (fs->super->s_blocks_count -
+		       fs->super->s_free_blocks_count);
+
+	frag_percent = (10000 * ctx->fs_fragmented) / inodes_used;
+	frag_percent = (frag_percent + 5) / 10;
+	
+	if (!verbose) {
+		printf("%s: %d/%d files (%0d.%d%% non-contiguous), %d/%d blocks\n",
+		       ctx->device_name, inodes_used, inodes,
+		       frag_percent / 10, frag_percent % 10,
+		       blocks_used, blocks);
+		return;
+	}
+	printf (P_("\n%8d inode used (%d%%)\n", "\n%8d inodes used (%d%%)\n",
+		   inodes_used), inodes_used, 100 * inodes_used / inodes);
+	printf (P_("%8d non-contiguous inode (%0d.%d%%)\n",
+		   "%8d non-contiguous inodes (%0d.%d%%)\n",
+		   ctx->fs_fragmented),
+		ctx->fs_fragmented, frag_percent / 10, frag_percent % 10);
+	printf (_("         # of inodes with ind/dind/tind blocks: %d/%d/%d\n"),
+		ctx->fs_ind_count, ctx->fs_dind_count, ctx->fs_tind_count);
+	printf (P_("%8d block used (%d%%)\n", "%8d blocks used (%d%%)\n",
+		   blocks_used),
+		blocks_used, (int) ((long long) 100 * blocks_used / blocks));
+	printf (P_("%8d bad block\n", "%8d bad blocks\n",
+		   ctx->fs_badblocks_count), ctx->fs_badblocks_count);
+	printf (P_("%8d large file\n", "%8d large files\n",
+		   ctx->large_files), ctx->large_files);
+	printf (P_("\n%8d regular file\n", "\n%8d regular files\n",
+		   ctx->fs_regular_count), ctx->fs_regular_count);
+	printf (P_("%8d directory\n", "%8d directories\n",
+		   ctx->fs_directory_count), ctx->fs_directory_count);
+	printf (P_("%8d character device file\n",
+		   "%8d character device files\n", ctx->fs_chardev_count),
+		ctx->fs_chardev_count);
+	printf (P_("%8d block device file\n", "%8d block device files\n",
+		   ctx->fs_blockdev_count), ctx->fs_blockdev_count);
+	printf (P_("%8d fifo\n", "%8d fifos\n", ctx->fs_fifo_count),
+		ctx->fs_fifo_count);
+	printf (P_("%8d link\n", "%8d links\n",
+		   ctx->fs_links_count - dir_links),
+		ctx->fs_links_count - dir_links);
+	printf (P_("%8d symbolic link", "%8d symbolic links",
+		   ctx->fs_symlinks_count), ctx->fs_symlinks_count);
+	printf (P_(" (%d fast symbolic link)\n", " (%d fast symbolic links)\n",
+		   ctx->fs_fast_symlinks_count), ctx->fs_fast_symlinks_count);
+	printf (P_("%8d socket\n", "%8d sockets\n", ctx->fs_sockets_count),
+		ctx->fs_sockets_count);
+	printf ("--------\n");
+	printf (P_("%8d file\n", "%8d files\n",
+		   ctx->fs_total_count - dir_links),
+		ctx->fs_total_count - dir_links);
+}
+
+static void check_mount(e2fsck_t ctx)
+{
+	errcode_t	retval;
+	int		cont;
+
+	retval = ext2fs_check_if_mounted(ctx->filesystem_name,
+					 &ctx->mount_flags);
+	if (retval) {
+		com_err("ext2fs_check_if_mount", retval,
+			_("while determining whether %s is mounted."),
+			ctx->filesystem_name);
+		return;
+	}
+
+	/*
+	 * If the filesystem isn't mounted, or it's the root filesystem
+	 * and it's mounted read-only, then everything's fine.
+	 */
+	if ((!(ctx->mount_flags & EXT2_MF_MOUNTED)) ||
+	    ((ctx->mount_flags & EXT2_MF_ISROOT) &&
+	     (ctx->mount_flags & EXT2_MF_READONLY)))
+		return;
+
+	if (ctx->options & E2F_OPT_READONLY) {
+		printf(_("Warning!  %s is mounted.\n"), ctx->filesystem_name);
+		return;
+	}
+
+	printf(_("%s is mounted.  "), ctx->filesystem_name);
+	if (!ctx->interactive)
+		fatal_error(ctx, _("Cannot continue, aborting.\n\n"));
+	printf(_("\n\n\007\007\007\007WARNING!!!  "
+	       "Running e2fsck on a mounted filesystem may cause\n"
+	       "SEVERE filesystem damage.\007\007\007\n\n"));
+	cont = ask_yn(_("Do you really want to continue"), -1);
+	if (!cont) {
+		printf (_("check aborted.\n"));
+		exit (0);
+	}
+	return;
+}
+
+static int is_on_batt(void)
+{
+	FILE	*f;
+	DIR	*d;
+	char	tmp[80], tmp2[80], fname[80];
+	unsigned int	acflag;
+	struct dirent*	de;
+
+	f = fopen("/proc/apm", "r");
+	if (f) {
+		if (fscanf(f, "%s %s %s %x", tmp, tmp, tmp, &acflag) != 4) 
+			acflag = 1;
+		fclose(f);
+		return (acflag != 1);
+	}
+	d = opendir("/proc/acpi/ac_adapter");
+	if (d) {
+		while ((de=readdir(d)) != NULL) {
+			if (!strncmp(".", de->d_name, 1))
+				continue;
+			snprintf(fname, 80, "/proc/acpi/ac_adapter/%s/state", 
+				 de->d_name);
+			f = fopen(fname, "r");
+			if (!f)
+				continue;
+			if (fscanf(f, "%s %s", tmp2, tmp) != 2)
+				tmp[0] = 0;
+			fclose(f);
+			if (strncmp(tmp, "off-line", 8) == 0) {
+				closedir(d);
+				return 1;
+			}
+		}
+		closedir(d);
+	}
+	return 0;
+}
+
+/*
+ * This routine checks to see if a filesystem can be skipped; if so,
+ * it will exit with E2FSCK_OK.  Under some conditions it will print a
+ * message explaining why a check is being forced.
+ */
+static void check_if_skip(e2fsck_t ctx)
+{
+	ext2_filsys fs = ctx->fs;
+	const char *reason = NULL;
+	unsigned int reason_arg = 0;
+	long next_check;
+	int batt = is_on_batt();
+	time_t now = time(0);
+	
+	if ((ctx->options & E2F_OPT_FORCE) || bad_blocks_file ||
+	    cflag || swapfs)
+		return;
+	
+	if ((fs->super->s_state & EXT2_ERROR_FS) ||
+	    !ext2fs_test_valid(fs))
+		reason = _(" contains a file system with errors");
+	else if ((fs->super->s_state & EXT2_VALID_FS) == 0)
+		reason = _(" was not cleanly unmounted");
+	else if ((fs->super->s_max_mnt_count > 0) &&
+		 (fs->super->s_mnt_count >=
+		  (unsigned) fs->super->s_max_mnt_count)) {
+		reason = _(" has been mounted %u times without being checked");
+		reason_arg = fs->super->s_mnt_count;
+		if (batt && (fs->super->s_mnt_count < 
+			     (unsigned) fs->super->s_max_mnt_count*2))
+			reason = 0;
+	} else if (fs->super->s_checkinterval &&
+		   ((now - fs->super->s_lastcheck) >= 
+		    fs->super->s_checkinterval)) {
+		reason = _(" has gone %u days without being checked");
+		reason_arg = (now - fs->super->s_lastcheck)/(3600*24);
+		if (batt && ((now - fs->super->s_lastcheck) < 
+			     fs->super->s_checkinterval*2))
+			reason = 0;
+	}
+	if (reason) {
+		fputs(ctx->device_name, stdout);
+		printf(reason, reason_arg);
+		fputs(_(", check forced.\n"), stdout);
+		return;
+	}
+	printf(_("%s: clean, %d/%d files, %d/%d blocks"), ctx->device_name,
+	       fs->super->s_inodes_count - fs->super->s_free_inodes_count,
+	       fs->super->s_inodes_count,
+	       fs->super->s_blocks_count - fs->super->s_free_blocks_count,
+	       fs->super->s_blocks_count);
+	next_check = 100000;
+	if (fs->super->s_max_mnt_count > 0) {
+		next_check = fs->super->s_max_mnt_count - fs->super->s_mnt_count;
+		if (next_check <= 0) 
+			next_check = 1;
+	}
+	if (fs->super->s_checkinterval &&
+	    ((now - fs->super->s_lastcheck) >= fs->super->s_checkinterval))
+		next_check = 1;
+	if (next_check <= 5) {
+		if (next_check == 1)
+			fputs(_(" (check after next mount)"), stdout);
+		else
+			printf(_(" (check in %ld mounts)"), next_check);
+	}
+	fputc('\n', stdout);
+	ext2fs_close(fs);
+	ctx->fs = NULL;
+	e2fsck_free_context(ctx);
+	exit(FSCK_OK);
+}
+
+/*
+ * For completion notice
+ */
+struct percent_tbl {
+	int	max_pass;
+	int	table[32];
+};
+struct percent_tbl e2fsck_tbl = {
+	5, { 0, 70, 90, 92,  95, 100 }
+};
+static char bar[128], spaces[128];
+
+static float calc_percent(struct percent_tbl *tbl, int pass, int curr,
+			  int max)
+{
+	float	percent;
+	
+	if (pass <= 0)
+		return 0.0;
+	if (pass > tbl->max_pass || max == 0)
+		return 100.0;
+	percent = ((float) curr) / ((float) max);
+	return ((percent * (tbl->table[pass] - tbl->table[pass-1]))
+		+ tbl->table[pass-1]);
+}
+
+extern void e2fsck_clear_progbar(e2fsck_t ctx)
+{
+	if (!(ctx->flags & E2F_FLAG_PROG_BAR))
+		return;
+	
+	printf("%s%s\r%s", ctx->start_meta, spaces + (sizeof(spaces) - 80),
+	       ctx->stop_meta);
+	fflush(stdout);
+	ctx->flags &= ~E2F_FLAG_PROG_BAR;
+}
+
+int e2fsck_simple_progress(e2fsck_t ctx, const char *label, float percent,
+			   unsigned int dpynum)
+{
+	static const char spinner[] = "\\|/-";
+	int	i;
+	unsigned int	tick;
+	struct timeval	tv;
+	int dpywidth;
+	int fixed_percent;
+
+	if (ctx->flags & E2F_FLAG_PROG_SUPPRESS)
+		return 0;
+
+	/*
+	 * Calculate the new progress position.  If the
+	 * percentage hasn't changed, then we skip out right
+	 * away. 
+	 */
+	fixed_percent = (int) ((10 * percent) + 0.5);
+	if (ctx->progress_last_percent == fixed_percent)
+		return 0;
+	ctx->progress_last_percent = fixed_percent;
+
+	/*
+	 * If we've already updated the spinner once within
+	 * the last 1/8th of a second, no point doing it
+	 * again.
+	 */
+	gettimeofday(&tv, NULL);
+	tick = (tv.tv_sec << 3) + (tv.tv_usec / (1000000 / 8));
+	if ((tick == ctx->progress_last_time) &&
+	    (fixed_percent != 0) && (fixed_percent != 1000))
+		return 0;
+	ctx->progress_last_time = tick;
+
+	/*
+	 * Advance the spinner, and note that the progress bar
+	 * will be on the screen
+	 */
+	ctx->progress_pos = (ctx->progress_pos+1) & 3;
+	ctx->flags |= E2F_FLAG_PROG_BAR;
+
+	dpywidth = 66 - strlen(label);
+	dpywidth = 8 * (dpywidth / 8);
+	if (dpynum)
+		dpywidth -= 8;
+
+	i = ((percent * dpywidth) + 50) / 100;
+	printf("%s%s: |%s%s", ctx->start_meta, label,
+	       bar + (sizeof(bar) - (i+1)),
+	       spaces + (sizeof(spaces) - (dpywidth - i + 1)));
+	if (fixed_percent == 1000)
+		fputc('|', stdout);
+	else
+		fputc(spinner[ctx->progress_pos & 3], stdout);
+	printf(" %4.1f%%  ", percent);
+	if (dpynum)
+		printf("%u\r", dpynum);
+	else
+		fputs(" \r", stdout);
+	fputs(ctx->stop_meta, stdout);
+	
+	if (fixed_percent == 1000)
+		e2fsck_clear_progbar(ctx);
+	fflush(stdout);
+
+	return 0;
+}
+
+static int e2fsck_update_progress(e2fsck_t ctx, int pass,
+				  unsigned long cur, unsigned long max)
+{
+	char buf[80];
+	float percent;
+
+	if (pass == 0)
+		return 0;
+	
+	if (ctx->progress_fd) {
+		sprintf(buf, "%d %lu %lu\n", pass, cur, max);
+		write(ctx->progress_fd, buf, strlen(buf));
+	} else {
+		percent = calc_percent(&e2fsck_tbl, pass, cur, max);
+		e2fsck_simple_progress(ctx, ctx->device_name,
+				       percent, 0);
+	}
+	return 0;
+}
+
+#define PATH_SET "PATH=/sbin"
+
+static void reserve_stdio_fds(void)
+{
+	int	fd;
+
+	while (1) {
+		fd = open("/dev/null", O_RDWR);
+		if (fd > 2)
+			break;
+		if (fd < 0) {
+			fprintf(stderr, _("ERROR: Couldn't open "
+				"/dev/null (%s)\n"),
+				strerror(errno));
+			break;
+		}
+	}
+	close(fd);
+}
+
+#ifdef HAVE_SIGNAL_H
+static void signal_progress_on(int sig EXT2FS_ATTR((unused)))
+{
+	e2fsck_t ctx = e2fsck_global_ctx;
+
+	if (!ctx)
+		return;
+
+	ctx->progress = e2fsck_update_progress;
+	ctx->progress_fd = 0;
+}
+
+static void signal_progress_off(int sig EXT2FS_ATTR((unused)))
+{
+	e2fsck_t ctx = e2fsck_global_ctx;
+
+	if (!ctx)
+		return;
+
+	e2fsck_clear_progbar(ctx);
+	ctx->progress = 0;
+}
+
+static void signal_cancel(int sig EXT2FS_ATTR((unused)))
+{
+	e2fsck_t ctx = e2fsck_global_ctx;
+
+	if (!ctx)
+		exit(FSCK_CANCELED);
+
+	ctx->flags |= E2F_FLAG_CANCEL;
+}
+#endif
+
+static void parse_extended_opts(e2fsck_t ctx, const char *opts)
+{
+	char	*buf, *token, *next, *p, *arg;
+	int	ea_ver;
+	int	extended_usage = 0;
+
+	buf = string_copy(ctx, opts, 0);
+	for (token = buf; token && *token; token = next) {
+		p = strchr(token, ',');
+		next = 0;
+		if (p) {
+			*p = 0;
+			next = p+1;
+		} 
+		arg = strchr(token, '=');
+		if (arg) {
+			*arg = 0;
+			arg++;
+		}
+		if (strcmp(token, "ea_ver") == 0) {
+			if (!arg) {
+				extended_usage++;
+				continue;
+			}
+			ea_ver = strtoul(arg, &p, 0);
+			if (*p ||
+			    ((ea_ver != 1) && (ea_ver != 2))) {
+				fprintf(stderr,
+					_("Invalid EA version.\n"));
+				extended_usage++;
+				continue;
+			}
+			ctx->ext_attr_ver = ea_ver;
+		} else
+			extended_usage++;
+	}
+	if (extended_usage) {
+		fprintf(stderr, _("Extended options are separated by commas, "
+			"and may take an argument which\n"
+			"is set off by an equals ('=') sign.  "
+			"Valid raid options are:\n"
+			"\tea_ver=<ea_version (1 or 2)\n\n"));
+		exit(1);
+	}
+}	
+
+
+static errcode_t PRS(int argc, char *argv[], e2fsck_t *ret_ctx)
+{
+	int		flush = 0;
+	int		c, fd;
+#ifdef MTRACE
+	extern void	*mallwatch;
+#endif
+	e2fsck_t	ctx;
+	errcode_t	retval;
+#ifdef HAVE_SIGNAL_H
+	struct sigaction	sa;
+#endif
+	char		*extended_opts = 0;
+
+	retval = e2fsck_allocate_context(&ctx);
+	if (retval)
+		return retval;
+
+	*ret_ctx = ctx;
+
+	setvbuf(stdout, NULL, _IONBF, BUFSIZ);
+	setvbuf(stderr, NULL, _IONBF, BUFSIZ);
+	if (isatty(0) && isatty(1)) {
+		ctx->interactive = 1;
+	} else {
+		ctx->start_meta[0] = '\001';
+		ctx->stop_meta[0] = '\002';
+	}
+	memset(bar, '=', sizeof(bar)-1);
+	memset(spaces, ' ', sizeof(spaces)-1);
+	blkid_get_cache(&ctx->blkid, NULL);
+	
+	if (argc && *argv)
+		ctx->program_name = *argv;
+	else
+		ctx->program_name = "e2fsck";
+	while ((c = getopt (argc, argv, "panyrcC:B:dE:fvtFVM:b:I:j:P:l:L:N:SsDk")) != EOF)
+		switch (c) {
+		case 'C':
+			ctx->progress = e2fsck_update_progress;
+			ctx->progress_fd = atoi(optarg);
+			if (!ctx->progress_fd)
+				break;
+			/* Validate the file descriptor to avoid disasters */
+			fd = dup(ctx->progress_fd);
+			if (fd < 0) {
+				fprintf(stderr,
+				_("Error validating file descriptor %d: %s\n"),
+					ctx->progress_fd,
+					error_message(errno));
+				fatal_error(ctx,
+			_("Invalid completion information file descriptor"));
+			} else
+				close(fd);
+			break;
+		case 'D':
+			ctx->options |= E2F_OPT_COMPRESS_DIRS;
+			break;
+		case 'E':
+			extended_opts = optarg;
+			break;
+		case 'p':
+		case 'a':
+			if (ctx->options & (E2F_OPT_YES|E2F_OPT_NO)) {
+			conflict_opt:
+				fatal_error(ctx, 
+	_("Only one the options -p/-a, -n or -y may be specified."));
+			}
+			ctx->options |= E2F_OPT_PREEN;
+			break;
+		case 'n':
+			if (ctx->options & (E2F_OPT_YES|E2F_OPT_PREEN))
+				goto conflict_opt;
+			ctx->options |= E2F_OPT_NO;
+			break;
+		case 'y':
+			if (ctx->options & (E2F_OPT_PREEN|E2F_OPT_NO))
+				goto conflict_opt;
+			ctx->options |= E2F_OPT_YES;
+			break;
+		case 't':
+#ifdef RESOURCE_TRACK
+			if (ctx->options & E2F_OPT_TIME)
+				ctx->options |= E2F_OPT_TIME2;
+			else
+				ctx->options |= E2F_OPT_TIME;
+#else
+			fprintf(stderr, _("The -t option is not "
+				"supported on this version of e2fsck.\n"));
+#endif
+			break;
+		case 'c':
+			if (cflag++)
+				ctx->options |= E2F_OPT_WRITECHECK;
+			ctx->options |= E2F_OPT_CHECKBLOCKS;
+			break;
+		case 'r':
+			/* What we do by default, anyway! */
+			break;
+		case 'b':
+			ctx->use_superblock = atoi(optarg);
+			ctx->flags |= E2F_FLAG_SB_SPECIFIED;
+			break;
+		case 'B':
+			ctx->blocksize = atoi(optarg);
+			break;
+		case 'I':
+			ctx->inode_buffer_blocks = atoi(optarg);
+			break;
+		case 'j':
+			ctx->journal_name = string_copy(ctx, optarg, 0);
+			break;
+		case 'P':
+			ctx->process_inode_size = atoi(optarg);
+			break;
+		case 'L':
+			replace_bad_blocks++;
+		case 'l':
+			bad_blocks_file = string_copy(ctx, optarg, 0);
+			break;
+		case 'd':
+			ctx->options |= E2F_OPT_DEBUG;
+			break;
+		case 'f':
+			ctx->options |= E2F_OPT_FORCE;
+			break;
+		case 'F':
+			flush = 1;
+			break;
+		case 'v':
+			verbose = 1;
+			break;
+		case 'V':
+			show_version_only = 1;
+			break;
+#ifdef MTRACE
+		case 'M':
+			mallwatch = (void *) strtol(optarg, NULL, 0);
+			break;
+#endif
+		case 'N':
+			ctx->device_name = optarg;
+			break;
+#ifdef ENABLE_SWAPFS
+		case 's':
+			normalize_swapfs = 1;
+		case 'S':
+			swapfs = 1;
+			break;
+#else
+		case 's':
+		case 'S':
+			fprintf(stderr, _("Byte-swapping filesystems "
+					  "not compiled in this version "
+					  "of e2fsck\n"));
+			exit(1);
+#endif
+		case 'k':
+			keep_bad_blocks++;
+			break;
+		default:
+			usage();
+		}
+	if (show_version_only)
+		return 0;
+	if (optind != argc - 1)
+		usage();
+	if ((ctx->options & E2F_OPT_NO) && !bad_blocks_file &&
+	    !cflag && !swapfs && !(ctx->options & E2F_OPT_COMPRESS_DIRS))
+		ctx->options |= E2F_OPT_READONLY;
+	ctx->io_options = strchr(argv[optind], '?');
+	if (ctx->io_options) 
+		*ctx->io_options++ = 0;
+	ctx->filesystem_name = blkid_get_devname(ctx->blkid, argv[optind], 0);
+	if (!ctx->filesystem_name) {
+		com_err(ctx->program_name, 0, _("Unable to resolve '%s'"), 
+			argv[optind]);
+		fatal_error(ctx, 0);
+	}
+	if (extended_opts)
+		parse_extended_opts(ctx, extended_opts);
+	
+	if (flush) {
+		fd = open(ctx->filesystem_name, O_RDONLY, 0);
+		if (fd < 0) {
+			com_err("open", errno,
+				_("while opening %s for flushing"),
+				ctx->filesystem_name);
+			fatal_error(ctx, 0);
+		}
+		if ((retval = ext2fs_sync_device(fd, 1))) {
+			com_err("ext2fs_sync_device", retval,
+				_("while trying to flush %s"),
+				ctx->filesystem_name);
+			fatal_error(ctx, 0);
+		}
+		close(fd);
+	}
+#ifdef ENABLE_SWAPFS
+	if (swapfs) {
+		if (cflag || bad_blocks_file) {
+			fprintf(stderr, _("Incompatible options not "
+					  "allowed when byte-swapping.\n"));
+			exit(FSCK_USAGE);
+		}
+	}
+#endif
+	if (cflag && bad_blocks_file) {
+		fprintf(stderr, _("The -c and the -l/-L options may "
+				  "not be both used at the same time.\n"));
+		exit(FSCK_USAGE);
+	}
+#ifdef HAVE_SIGNAL_H
+	/*
+	 * Set up signal action
+	 */
+	memset(&sa, 0, sizeof(struct sigaction));
+	sa.sa_handler = signal_cancel;
+	sigaction(SIGINT, &sa, 0);
+	sigaction(SIGTERM, &sa, 0);
+#ifdef SA_RESTART
+	sa.sa_flags = SA_RESTART;
+#endif
+	e2fsck_global_ctx = ctx;
+	sa.sa_handler = signal_progress_on;
+	sigaction(SIGUSR1, &sa, 0);
+	sa.sa_handler = signal_progress_off;
+	sigaction(SIGUSR2, &sa, 0);
+#endif
+
+	/* Update our PATH to include /sbin if we need to run badblocks  */
+	if (cflag) {
+		char *oldpath = getenv("PATH");
+		if (oldpath) {
+			char *newpath;
+
+			newpath = (char *) malloc(sizeof (PATH_SET) + 1 +
+						  strlen (oldpath));
+			if (!newpath)
+				fatal_error(ctx, "Couldn't malloc() newpath");
+			strcpy (newpath, PATH_SET);
+			strcat (newpath, ":");
+			strcat (newpath, oldpath);
+			putenv (newpath);
+		} else
+			putenv (PATH_SET);
+	}
+#ifdef __CONFIG_JBD_DEBUG__E2FS
+	if (getenv("E2FSCK_JBD_DEBUG"))
+		journal_enable_debug = atoi(getenv("E2FSCK_JBD_DEBUG"));
+#endif
+	return 0;
+}
+
+static const char *my_ver_string = E2FSPROGS_VERSION;
+static const char *my_ver_date = E2FSPROGS_DATE;
+					
+int e2fsck_main (int argc, char *argv[])
+{
+	errcode_t	retval = 0;
+	int		exit_value = FSCK_OK;
+	ext2_filsys	fs = 0;
+	io_manager	io_ptr;
+	struct ext2_super_block *sb;
+	const char	*lib_ver_date;
+	int		my_ver, lib_ver;
+	e2fsck_t	ctx;
+	struct problem_context pctx;
+	int flags, run_result;
+	
+	clear_problem_context(&pctx);
+#ifdef MTRACE
+	mtrace();
+#endif
+#ifdef MCHECK
+	mcheck(0);
+#endif
+#ifdef ENABLE_NLS
+	setlocale(LC_MESSAGES, "");
+	setlocale(LC_CTYPE, "");
+	bindtextdomain(NLS_CAT_NAME, LOCALEDIR);
+	textdomain(NLS_CAT_NAME);
+#endif
+	my_ver = ext2fs_parse_version_string(my_ver_string);
+	lib_ver = ext2fs_get_library_version(0, &lib_ver_date);
+	if (my_ver > lib_ver) {
+		fprintf( stderr, _("Error: ext2fs library version "
+			"out of date!\n"));
+		show_version_only++;
+	}
+	
+	retval = PRS(argc, argv, &ctx);
+	if (retval) {
+		com_err("e2fsck", retval,
+			_("while trying to initialize program"));
+		exit(FSCK_ERROR);
+	}
+	reserve_stdio_fds();
+	
+#ifdef RESOURCE_TRACK
+	init_resource_track(&ctx->global_rtrack);
+#endif
+
+	if (!(ctx->options & E2F_OPT_PREEN) || show_version_only)
+		fprintf(stderr, "e2fsck %s (%s)\n", my_ver_string,
+			 my_ver_date);
+
+	if (show_version_only) {
+		fprintf(stderr, _("\tUsing %s, %s\n"),
+			error_message(EXT2_ET_BASE), lib_ver_date);
+		exit(FSCK_OK);
+	}
+	
+	check_mount(ctx);
+	
+	if (!(ctx->options & E2F_OPT_PREEN) &&
+	    !(ctx->options & E2F_OPT_NO) &&
+	    !(ctx->options & E2F_OPT_YES)) {
+		if (!ctx->interactive)
+			fatal_error(ctx,
+				    _("need terminal for interactive repairs"));
+	}
+	ctx->superblock = ctx->use_superblock;
+restart:
+#ifdef CONFIG_TESTIO_DEBUG
+	io_ptr = test_io_manager;
+	test_io_backing_manager = unix_io_manager;
+#else
+	io_ptr = unix_io_manager;
+#endif
+	flags = 0;
+	if ((ctx->options & E2F_OPT_READONLY) == 0)
+		flags |= EXT2_FLAG_RW;
+
+	if (ctx->superblock && ctx->blocksize) {
+		retval = ext2fs_open2(ctx->filesystem_name, ctx->io_options, 
+				      flags, ctx->superblock, ctx->blocksize,
+				      io_ptr, &fs);
+	} else if (ctx->superblock) {
+		int blocksize;
+		for (blocksize = EXT2_MIN_BLOCK_SIZE;
+		     blocksize <= EXT2_MAX_BLOCK_SIZE; blocksize *= 2) {
+			retval = ext2fs_open2(ctx->filesystem_name, 
+					      ctx->io_options, flags,
+					      ctx->superblock, blocksize,
+					      io_ptr, &fs);
+			if (!retval)
+				break;
+		}
+	} else 
+		retval = ext2fs_open2(ctx->filesystem_name, ctx->io_options, 
+				      flags, 0, 0, io_ptr, &fs);
+	if (!ctx->superblock && !(ctx->options & E2F_OPT_PREEN) &&
+	    !(ctx->flags & E2F_FLAG_SB_SPECIFIED) &&
+	    ((retval == EXT2_ET_BAD_MAGIC) ||
+	     ((retval == 0) && ext2fs_check_desc(fs)))) {
+		if (!fs || (fs->group_desc_count > 1)) {
+			printf(_("%s trying backup blocks...\n"),
+			       retval ? _("Couldn't find ext2 superblock,") :
+			       _("Group descriptors look bad..."));
+			get_backup_sb(ctx, fs, ctx->filesystem_name, io_ptr);
+			if (fs)
+				ext2fs_close(fs);
+			goto restart;
+		}
+	}
+	if (retval) {
+		com_err(ctx->program_name, retval, _("while trying to open %s"),
+			ctx->filesystem_name);
+		if (retval == EXT2_ET_REV_TOO_HIGH) {
+			printf(_("The filesystem revision is apparently "
+			       "too high for this version of e2fsck.\n"
+			       "(Or the filesystem superblock "
+			       "is corrupt)\n\n"));
+			fix_problem(ctx, PR_0_SB_CORRUPT, &pctx);
+		} else if (retval == EXT2_ET_SHORT_READ)
+			printf(_("Could this be a zero-length partition?\n"));
+		else if ((retval == EPERM) || (retval == EACCES))
+			printf(_("You must have %s access to the "
+			       "filesystem or be root\n"),
+			       (ctx->options & E2F_OPT_READONLY) ?
+			       "r/o" : "r/w");
+		else if (retval == ENXIO)
+			printf(_("Possibly non-existent or swap device?\n"));
+#ifdef EROFS
+		else if (retval == EROFS)
+			printf(_("Disk write-protected; use the -n option "
+			       "to do a read-only\n"
+			       "check of the device.\n"));
+#endif
+		else
+			fix_problem(ctx, PR_0_SB_CORRUPT, &pctx);
+		fatal_error(ctx, 0);
+	}
+	ctx->fs = fs;
+	fs->priv_data = ctx;
+	sb = fs->super;
+	if (sb->s_rev_level > E2FSCK_CURRENT_REV) {
+		com_err(ctx->program_name, EXT2_ET_REV_TOO_HIGH,
+			_("while trying to open %s"),
+			ctx->filesystem_name);
+	get_newer:
+		fatal_error(ctx, _("Get a newer version of e2fsck!"));
+	}
+
+	/*
+	 * Set the device name, which is used whenever we print error
+	 * or informational messages to the user.
+	 */
+	if (ctx->device_name == 0 &&
+	    (sb->s_volume_name[0] != 0)) {
+		ctx->device_name = string_copy(ctx, sb->s_volume_name,
+					       sizeof(sb->s_volume_name));
+	}
+	if (ctx->device_name == 0)
+		ctx->device_name = ctx->filesystem_name;
+
+	/*
+	 * Make sure the ext3 superblock fields are consistent.
+	 */
+	retval = e2fsck_check_ext3_journal(ctx);
+	if (retval) {
+		com_err(ctx->program_name, retval,
+			_("while checking ext3 journal for %s"),
+			ctx->device_name);
+		fatal_error(ctx, 0);
+	}
+
+	/*
+	 * Check to see if we need to do ext3-style recovery.  If so,
+	 * do it, and then restart the fsck.
+	 */
+	if (sb->s_feature_incompat & EXT3_FEATURE_INCOMPAT_RECOVER) {
+		if (ctx->options & E2F_OPT_READONLY) {
+			printf(_("Warning: skipping journal recovery "
+				 "because doing a read-only filesystem "
+				 "check.\n"));
+			io_channel_flush(ctx->fs->io);
+		} else {
+			if (ctx->flags & E2F_FLAG_RESTARTED) {
+				/*
+				 * Whoops, we attempted to run the
+				 * journal twice.  This should never
+				 * happen, unless the hardware or
+				 * device driver is being bogus.
+				 */
+				com_err(ctx->program_name, 0,
+					_("unable to set superblock flags on %s\n"), ctx->device_name);
+				fatal_error(ctx, 0);
+			}
+			retval = e2fsck_run_ext3_journal(ctx);
+			if (retval) {
+				com_err(ctx->program_name, retval,
+				_("while recovering ext3 journal of %s"),
+					ctx->device_name);
+				fatal_error(ctx, 0);
+			}
+			ext2fs_close(ctx->fs);
+			ctx->fs = 0;
+			ctx->flags |= E2F_FLAG_RESTARTED;
+			goto restart;
+		}
+	}
+
+	/*
+	 * Check for compatibility with the feature sets.  We need to
+	 * be more stringent than ext2fs_open().
+	 */
+	if ((sb->s_feature_compat & ~EXT2_LIB_FEATURE_COMPAT_SUPP) ||
+	    (sb->s_feature_incompat & ~EXT2_LIB_FEATURE_INCOMPAT_SUPP)) {
+		com_err(ctx->program_name, EXT2_ET_UNSUPP_FEATURE,
+			"(%s)", ctx->device_name);
+		goto get_newer;
+	}
+	if (sb->s_feature_ro_compat & ~EXT2_LIB_FEATURE_RO_COMPAT_SUPP) {
+		com_err(ctx->program_name, EXT2_ET_RO_UNSUPP_FEATURE,
+			"(%s)", ctx->device_name);
+		goto get_newer;
+	}
+#ifdef ENABLE_COMPRESSION
+	if (sb->s_feature_incompat & EXT2_FEATURE_INCOMPAT_COMPRESSION)
+		com_err(ctx->program_name, 0,
+			_("Warning: compression support is experimental.\n"));
+#endif
+#ifndef ENABLE_HTREE
+	if (sb->s_feature_compat & EXT2_FEATURE_COMPAT_DIR_INDEX) {
+		com_err(ctx->program_name, 0,
+			_("E2fsck not compiled with HTREE support,\n\t"
+			  "but filesystem %s has HTREE directories.\n"),
+			ctx->device_name);
+		goto get_newer;
+	}
+#endif
+
+	/*
+	 * If the user specified a specific superblock, presumably the
+	 * master superblock has been trashed.  So we mark the
+	 * superblock as dirty, so it can be written out.
+	 */
+	if (ctx->superblock &&
+	    !(ctx->options & E2F_OPT_READONLY))
+		ext2fs_mark_super_dirty(fs);
+
+	/*
+	 * We only update the master superblock because (a) paranoia;
+	 * we don't want to corrupt the backup superblocks, and (b) we
+	 * don't need to update the mount count and last checked
+	 * fields in the backup superblock (the kernel doesn't
+	 * update the backup superblocks anyway).
+	 */
+	fs->flags |= EXT2_FLAG_MASTER_SB_ONLY;
+
+	ehandler_init(fs->io);
+
+	if (ctx->superblock)
+		set_latch_flags(PR_LATCH_RELOC, PRL_LATCHED, 0);
+	ext2fs_mark_valid(fs);
+	check_super_block(ctx);
+	if (ctx->flags & E2F_FLAG_SIGNAL_MASK)
+		fatal_error(ctx, 0);
+	check_if_skip(ctx);
+	if (bad_blocks_file)
+		read_bad_blocks_file(ctx, bad_blocks_file, replace_bad_blocks);
+	else if (cflag)
+		read_bad_blocks_file(ctx, 0, !keep_bad_blocks); /* Test disk */
+	if (ctx->flags & E2F_FLAG_SIGNAL_MASK)
+		fatal_error(ctx, 0);
+#ifdef ENABLE_SWAPFS
+	if (normalize_swapfs) {
+		if ((fs->flags & EXT2_FLAG_SWAP_BYTES) ==
+		    ext2fs_native_flag()) {
+			fprintf(stderr, _("%s: Filesystem byte order "
+				"already normalized.\n"), ctx->device_name);
+			fatal_error(ctx, 0);
+		}
+	}
+	if (swapfs) {
+		swap_filesys(ctx);
+		if (ctx->flags & E2F_FLAG_SIGNAL_MASK)
+			fatal_error(ctx, 0);
+	}
+#endif
+
+	/*
+	 * Mark the system as valid, 'til proven otherwise
+	 */
+	ext2fs_mark_valid(fs);
+
+	retval = ext2fs_read_bb_inode(fs, &fs->badblocks);
+	if (retval) {
+		com_err(ctx->program_name, retval,
+			_("while reading bad blocks inode"));
+		preenhalt(ctx);
+		printf(_("This doesn't bode well,"
+			 " but we'll try to go on...\n"));
+	}
+
+	run_result = e2fsck_run(ctx);
+	e2fsck_clear_progbar(ctx);
+	if (run_result == E2F_FLAG_RESTART) {
+		printf(_("Restarting e2fsck from the beginning...\n"));
+		retval = e2fsck_reset_context(ctx);
+		if (retval) {
+			com_err(ctx->program_name, retval,
+				_("while resetting context"));
+			fatal_error(ctx, 0);
+		}
+		ext2fs_close(fs);
+		goto restart;
+	}
+	if (run_result & E2F_FLAG_CANCEL) {
+		printf(_("%s: e2fsck canceled.\n"), ctx->device_name ?
+		       ctx->device_name : ctx->filesystem_name);
+		exit_value |= FSCK_CANCELED;
+	}
+	if (run_result & E2F_FLAG_ABORT)
+		fatal_error(ctx, _("aborted"));
+
+#ifdef MTRACE
+	mtrace_print("Cleanup");
+#endif
+	if (ext2fs_test_changed(fs)) {
+		exit_value |= FSCK_NONDESTRUCT;
+		if (!(ctx->options & E2F_OPT_PREEN))
+		    printf(_("\n%s: ***** FILE SYSTEM WAS MODIFIED *****\n"),
+			       ctx->device_name);
+		if (ctx->mount_flags & EXT2_MF_ISROOT) {
+			printf(_("%s: ***** REBOOT LINUX *****\n"),
+			       ctx->device_name);
+			exit_value |= FSCK_REBOOT;
+		}
+	}
+	if (!ext2fs_test_valid(fs)) {
+		printf(_("\n%s: ********** WARNING: Filesystem still has "
+			 "errors **********\n\n"), ctx->device_name);
+		exit_value |= FSCK_UNCORRECTED;
+		exit_value &= ~FSCK_NONDESTRUCT;
+	}
+	if (exit_value & FSCK_CANCELED)
+		exit_value &= ~FSCK_NONDESTRUCT;
+	else {
+		show_stats(ctx);
+		if (!(ctx->options & E2F_OPT_READONLY)) {
+			if (ext2fs_test_valid(fs)) {
+				if (!(sb->s_state & EXT2_VALID_FS))
+					exit_value |= FSCK_NONDESTRUCT;
+				sb->s_state = EXT2_VALID_FS;
+			} else
+				sb->s_state &= ~EXT2_VALID_FS;
+			sb->s_mnt_count = 0;
+			sb->s_lastcheck = time(NULL);
+			ext2fs_mark_super_dirty(fs);
+		}
+	}
+
+	e2fsck_write_bitmaps(ctx);
+	
+	ext2fs_close(fs);
+	ctx->fs = NULL;
+	free(ctx->filesystem_name);
+	free(ctx->journal_name);
+	e2fsck_free_context(ctx);
+	
+#ifdef RESOURCE_TRACK
+	if (ctx->options & E2F_OPT_TIME)
+		print_resource_track(NULL, &ctx->global_rtrack);
+#endif
+
+	return exit_value;
+}