2 * unix.c - The unix-specific code for e2fsck
4 * Copyright (C) 1993, 1994, 1995, 1996, 1997 Theodore Ts'o.
7 * This file may be redistributed under the terms of the GNU Public
31 #include <sys/ioctl.h>
34 #include "et/com_err.h"
37 #include "../version.h"
39 extern int isatty(int);
41 /* Command line options */
42 static int blocksize = 0;
43 static int swapfs = 0;
44 static int normalize_swapfs = 0;
45 static int cflag = 0; /* check disk */
46 static int show_version_only = 0;
48 static int verbose = 0;
50 static int replace_bad_blocks = 0;
51 static char *bad_blocks_file = 0;
53 static int possible_block_sizes[] = { 1024, 2048, 4096, 8192, 0};
55 static int root_filesystem = 0;
56 static int read_only_root = 0;
58 static void usage(e2fsck_t ctx)
61 "Usage: %s [-panyrcdfvstFSV] [-b superblock] [-B blocksize]\n"
62 "\t\t[-I inode_buffer_blocks] [-P process_inode_size]\n"
63 "\t\t[-l|-L bad_blocks_file] device\n", ctx->program_name);
67 static void show_stats(e2fsck_t ctx)
69 ext2_filsys fs = ctx->fs;
70 int inodes, inodes_used, blocks, blocks_used;
72 int num_files, num_links;
75 dir_links = 2 * ctx->fs_directory_count - 1;
76 num_files = ctx->fs_total_count - dir_links;
77 num_links = ctx->fs_links_count - dir_links;
78 inodes = fs->super->s_inodes_count;
79 inodes_used = (fs->super->s_inodes_count -
80 fs->super->s_free_inodes_count);
81 blocks = fs->super->s_blocks_count;
82 blocks_used = (fs->super->s_blocks_count -
83 fs->super->s_free_blocks_count);
85 frag_percent = (10000 * ctx->fs_fragmented) / inodes_used;
86 frag_percent = (frag_percent + 5) / 10;
89 printf("%s: %d/%d files (%0d.%d%% non-contiguous), %d/%d blocks\n",
90 ctx->device_name, inodes_used, inodes,
91 frag_percent / 10, frag_percent % 10,
95 printf ("\n%8d inode%s used (%d%%)\n", inodes_used,
96 (inodes_used != 1) ? "s" : "",
97 100 * inodes_used / inodes);
98 printf ("%8d non-contiguous inodes (%0d.%d%%)\n",
99 ctx->fs_fragmented, frag_percent / 10, frag_percent % 10);
100 printf (" # of inodes with ind/dind/tind blocks: %d/%d/%d\n",
101 ctx->fs_ind_count, ctx->fs_dind_count, ctx->fs_tind_count);
102 printf ("%8d block%s used (%d%%)\n"
103 "%8d bad block%s\n", blocks_used,
104 (blocks_used != 1) ? "s" : "",
105 100 * blocks_used / blocks, ctx->fs_badblocks_count,
106 ctx->fs_badblocks_count != 1 ? "s" : "");
107 printf ("\n%8d regular file%s\n"
109 "%8d character device file%s\n"
110 "%8d block device file%s\n"
113 "%8d symbolic link%s (%d fast symbolic link%s)\n"
117 ctx->fs_regular_count,
118 (ctx->fs_regular_count != 1) ? "s" : "",
119 ctx->fs_directory_count,
120 (ctx->fs_directory_count != 1) ? "ies" : "y",
121 ctx->fs_chardev_count,
122 (ctx->fs_chardev_count != 1) ? "s" : "",
123 ctx->fs_blockdev_count,
124 (ctx->fs_blockdev_count != 1) ? "s" : "",
126 (ctx->fs_fifo_count != 1) ? "s" : "",
127 ctx->fs_links_count - dir_links,
128 ((ctx->fs_links_count - dir_links) != 1) ? "s" : "",
129 ctx->fs_symlinks_count,
130 (ctx->fs_symlinks_count != 1) ? "s" : "",
131 ctx->fs_fast_symlinks_count,
132 (ctx->fs_fast_symlinks_count != 1) ? "s" : "",
133 ctx->fs_sockets_count, (ctx->fs_sockets_count != 1) ? "s" : "",
134 ctx->fs_total_count - dir_links,
135 ((ctx->fs_total_count - dir_links) != 1) ? "s" : "");
138 static void check_mount(e2fsck_t ctx)
141 int mount_flags, cont, fd;
143 retval = ext2fs_check_if_mounted(ctx->filesystem_name, &mount_flags);
145 com_err("ext2fs_check_if_mount", retval,
146 "while determining whether %s is mounted.",
147 ctx->filesystem_name);
150 if (!(mount_flags & EXT2_MF_MOUNTED))
153 #if (defined(__linux__) && defined(HAVE_MNTENT_H))
155 * If the root is mounted read-only, then /etc/mtab is
156 * probably not correct; so we won't issue a warning based on
159 fd = open(MOUNTED, O_RDWR);
167 if (ctx->options & E2F_OPT_READONLY) {
168 printf("Warning! %s is mounted.\n", ctx->device_name);
172 printf("%s is mounted.\n\n", ctx->device_name);
173 printf("\007\007\007\007WARNING!!! Running e2fsck on a mounted filesystem "
174 "may cause\nSEVERE filesystem damage.\007\007\007\n\n");
175 if (isatty (0) && isatty (1))
176 cont = ask_yn("Do you really want to continue", -1);
180 printf ("check aborted.\n");
187 * This routine checks to see if a filesystem can be skipped; if so,
188 * it will exit with E2FSCK_OK. Under some conditions it will print a
189 * message explaining why a check is being forced.
191 static void check_if_skip(e2fsck_t ctx)
193 ext2_filsys fs = ctx->fs;
194 const char *reason = NULL;
196 if (force || bad_blocks_file || cflag || swapfs)
199 if (fs->super->s_state & EXT2_ERROR_FS)
200 reason = "contains a file system with errors";
201 else if (fs->super->s_mnt_count >=
202 (unsigned) fs->super->s_max_mnt_count)
203 reason = "has reached maximal mount count";
204 else if (fs->super->s_checkinterval &&
205 time(0) >= (fs->super->s_lastcheck +
206 fs->super->s_checkinterval))
207 reason = "has gone too long without being checked";
208 else if ((fs->super->s_state & EXT2_VALID_FS) == 0)
209 reason = "was not cleanly unmounted";
211 printf("%s %s, check forced.\n", ctx->device_name, reason);
214 printf("%s: clean, %d/%d files, %d/%d blocks\n", ctx->device_name,
215 fs->super->s_inodes_count - fs->super->s_free_inodes_count,
216 fs->super->s_inodes_count,
217 fs->super->s_blocks_count - fs->super->s_free_blocks_count,
218 fs->super->s_blocks_count);
224 #define PATH_SET "PATH=/sbin"
226 static errcode_t PRS(int argc, char *argv[], e2fsck_t *ret_ctx)
231 extern void *mallwatch;
233 char *oldpath = getenv("PATH");
237 retval = e2fsck_allocate_context(&ctx);
243 /* Update our PATH to include /sbin */
247 newpath = (char *) malloc(sizeof (PATH_SET) + 1 +
250 fatal_error(ctx, "Couldn't malloc() newpath");
251 strcpy (newpath, PATH_SET);
252 strcat (newpath, ":");
253 strcat (newpath, oldpath);
258 setbuf(stdout, NULL);
259 setbuf(stderr, NULL);
260 initialize_ext2_error_table();
263 ctx->program_name = *argv;
265 ctx->program_name = "e2fsck";
266 while ((c = getopt (argc, argv, "panyrcB:dfvtFVM:b:I:P:l:L:N:Ss")) != EOF)
270 ctx->options |= E2F_OPT_PREEN;
271 ctx->options &= ~(E2F_OPT_YES|E2F_OPT_NO);
274 ctx->options |= E2F_OPT_NO;
275 ctx->options &= ~(E2F_OPT_YES|E2F_OPT_PREEN);
278 ctx->options |= E2F_OPT_YES;
279 ctx->options &= ~(E2F_OPT_PREEN|E2F_OPT_NO);
282 #ifdef RESOURCE_TRACK
283 if (ctx->options & E2F_OPT_TIME)
284 ctx->options |= E2F_OPT_TIME2;
286 ctx->options |= E2F_OPT_TIME;
288 fprintf(stderr, "The -t option is not "
289 "supported on this version of e2fsck.\n");
294 ctx->options |= E2F_OPT_CHECKBLOCKS;
297 /* What we do by default, anyway! */
300 ctx->use_superblock = atoi(optarg);
303 blocksize = atoi(optarg);
306 ctx->inode_buffer_blocks = atoi(optarg);
309 ctx->process_inode_size = atoi(optarg);
312 replace_bad_blocks++;
314 bad_blocks_file = (char *) malloc(strlen(optarg)+1);
315 if (!bad_blocks_file)
317 "Couldn't malloc bad_blocks_file");
318 strcpy(bad_blocks_file, optarg);
321 ctx->options |= E2F_OPT_DEBUG;
330 fatal_error(ctx, "-F not supported");
337 show_version_only = 1;
341 mallwatch = (void *) strtol(optarg, NULL, 0);
345 ctx->device_name = optarg;
348 normalize_swapfs = 1;
355 if (show_version_only)
357 if (optind != argc - 1)
359 if ((ctx->options & E2F_OPT_NO) && !bad_blocks_file &&
361 ctx->options |= E2F_OPT_READONLY;
362 ctx->filesystem_name = argv[optind];
363 if (ctx->device_name == 0)
364 ctx->device_name = ctx->filesystem_name;
367 int fd = open(ctx->filesystem_name, O_RDONLY, 0);
370 com_err("open", errno, "while opening %s for flushing",
371 ctx->filesystem_name);
374 if (ioctl(fd, BLKFLSBUF, 0) < 0) {
375 com_err("BLKFLSBUF", errno, "while trying to flush %s",
376 ctx->filesystem_name);
381 fatal_error(ctx, "BLKFLSBUF not supported");
382 #endif /* BLKFLSBUF */
385 if (cflag || bad_blocks_file) {
386 fprintf(stderr, "Incompatible options not "
387 "allowed when byte-swapping.\n");
394 static const char *my_ver_string = E2FSPROGS_VERSION;
395 static const char *my_ver_date = E2FSPROGS_DATE;
397 int main (int argc, char *argv[])
399 errcode_t retval = 0;
400 int exit_value = FSCK_OK;
405 const char *lib_ver_date;
408 struct problem_context pctx;
409 int flags, run_result;
411 clear_problem_context(&pctx);
418 my_ver = ext2fs_parse_version_string(my_ver_string);
419 lib_ver = ext2fs_get_library_version(0, &lib_ver_date);
420 if (my_ver > lib_ver) {
421 fprintf( stderr, "Error: ext2fs library version "
426 retval = PRS(argc, argv, &ctx);
428 com_err("e2fsck", retval,
429 "while trying to initialize program");
433 #ifdef RESOURCE_TRACK
434 init_resource_track(&ctx->global_rtrack);
437 if (!(ctx->options & E2F_OPT_PREEN) || show_version_only)
438 fprintf (stderr, "e2fsck %s, %s for EXT2 FS %s, %s\n",
439 my_ver_string, my_ver_date, EXT2FS_VERSION,
442 if (show_version_only) {
443 fprintf(stderr, "\tUsing %s, %s\n",
444 error_message(EXT2_ET_BASE), lib_ver_date);
450 if (!(ctx->options & E2F_OPT_PREEN) &&
451 !(ctx->options & E2F_OPT_NO) &&
452 !(ctx->options & E2F_OPT_YES)) {
453 if (!isatty (0) || !isatty (1))
455 "need terminal for interactive repairs");
457 ctx->superblock = ctx->use_superblock;
460 io_ptr = unix_io_manager;
462 io_ptr = test_io_manager;
463 test_io_backing_manager = unix_io_manager;
465 flags = (ctx->options & E2F_OPT_READONLY) ? 0 : EXT2_FLAG_RW;
466 if (ctx->superblock && blocksize) {
467 retval = ext2fs_open(ctx->filesystem_name, flags,
468 ctx->superblock, blocksize, io_ptr, &fs);
469 } else if (ctx->superblock) {
470 for (i=0; possible_block_sizes[i]; i++) {
471 retval = ext2fs_open(ctx->filesystem_name, flags,
473 possible_block_sizes[i],
479 retval = ext2fs_open(ctx->filesystem_name, flags,
481 if (!ctx->superblock && !(ctx->options & E2F_OPT_PREEN) &&
482 ((retval == EXT2_ET_BAD_MAGIC) ||
483 ((retval == 0) && ext2fs_check_desc(fs)))) {
484 if (!fs || (fs->group_desc_count > 1)) {
485 printf("%s trying backup blocks...\n",
486 retval ? "Couldn't find ext2 superblock," :
487 "Group descriptors look bad...");
488 ctx->superblock = get_backup_sb(fs);
495 com_err(ctx->program_name, retval, "while trying to open %s",
496 ctx->filesystem_name);
497 if (retval == EXT2_ET_REV_TOO_HIGH)
498 printf ("Get a newer version of e2fsck!\n");
499 else if (retval == EXT2_ET_SHORT_READ)
500 printf ("Could this be a zero-length partition?\n");
501 else if ((retval == EPERM) || (retval == EACCES))
502 printf("You must have %s access to the "
503 "filesystem or be root\n",
504 (ctx->options & E2F_OPT_READONLY) ?
506 else if (retval == ENXIO)
507 printf("Possibly non-existent or swap device?\n");
509 else if (retval == EROFS)
510 printf("Disk write-protected; use the -n option"
511 "to do a read-only\n"
512 "check of the device.\n");
516 fix_problem(ctx, PR_0_SB_CORRUPT, &pctx);
521 #ifdef EXT2_CURRENT_REV
522 if (fs->super->s_rev_level > E2FSCK_CURRENT_REV) {
523 com_err(ctx->program_name, EXT2_ET_REV_TOO_HIGH,
524 "while trying to open %s",
525 ctx->filesystem_name);
527 fatal_error(ctx, "Get a newer version of e2fsck!");
531 * Check for compatibility with the feature sets. We need to
532 * be more stringent than ext2fs_open().
534 s = (struct ext2fs_sb *) fs->super;
535 if ((s->s_feature_compat & ~EXT2_LIB_FEATURE_COMPAT_SUPP) ||
536 (s->s_feature_incompat & ~EXT2_LIB_FEATURE_INCOMPAT_SUPP)) {
537 com_err(ctx->program_name, EXT2_ET_UNSUPP_FEATURE,
538 "(%s)", ctx->filesystem_name);
541 if (s->s_feature_ro_compat & ~EXT2_LIB_FEATURE_RO_COMPAT_SUPP) {
542 com_err(ctx->program_name, EXT2_ET_RO_UNSUPP_FEATURE,
543 "(%s)", ctx->filesystem_name);
548 * If the user specified a specific superblock, presumably the
549 * master superblock has been trashed. So we mark the
550 * superblock as dirty, so it can be written out.
552 if (ctx->superblock &&
553 !(ctx->options & E2F_OPT_READONLY))
554 ext2fs_mark_super_dirty(fs);
557 * Don't overwrite the backup superblock and block
558 * descriptors, until we're sure the filesystem is OK....
560 fs->flags |= EXT2_FLAG_MASTER_SB_ONLY;
562 ehandler_init(fs->io);
565 set_latch_flags(PR_LATCH_RELOC, PRL_LATCHED, 0);
566 check_super_block(ctx);
567 if (ctx->flags & E2F_FLAG_ABORT)
571 read_bad_blocks_file(ctx, bad_blocks_file, replace_bad_blocks);
574 if (ctx->flags & E2F_FLAG_ABORT)
577 if (normalize_swapfs) {
578 if ((fs->flags & EXT2_FLAG_SWAP_BYTES) ==
579 ext2fs_native_flag()) {
580 fprintf(stderr, "%s: Filesystem byte order "
581 "already normalized.\n", ctx->device_name);
587 if (ctx->flags & E2F_FLAG_ABORT)
592 * Mark the system as valid, 'til proven otherwise
594 ext2fs_mark_valid(fs);
596 retval = ext2fs_read_bb_inode(fs, &fs->badblocks);
598 com_err(ctx->program_name, retval,
599 "while reading bad blocks inode");
601 printf("This doesn't bode well, but we'll try to go on...\n");
604 run_result = e2fsck_run(ctx);
605 if (run_result == E2F_FLAG_RESTART) {
607 printf("Restarting e2fsck from the beginning...\n");
608 retval = e2fsck_reset_context(ctx);
610 com_err(ctx->program_name, retval,
611 "while resetting context");
616 if (run_result & E2F_FLAG_ABORT)
618 if (run_result & E2F_FLAG_CANCEL)
619 ext2fs_unmark_valid(fs);
622 mtrace_print("Cleanup");
624 if (ext2fs_test_changed(fs)) {
625 exit_value = FSCK_NONDESTRUCT;
626 if (!(ctx->options & E2F_OPT_PREEN))
627 printf("\n%s: ***** FILE SYSTEM WAS MODIFIED *****\n",
629 if (root_filesystem && !read_only_root) {
630 printf("%s: ***** REBOOT LINUX *****\n",
632 exit_value = FSCK_REBOOT;
635 if (ext2fs_test_valid(fs))
636 fs->flags &= ~EXT2_FLAG_MASTER_SB_ONLY;
638 exit_value = FSCK_UNCORRECTED;
639 if (!(ctx->options & E2F_OPT_READONLY)) {
640 if (ext2fs_test_valid(fs)) {
641 if (!(fs->super->s_state & EXT2_VALID_FS))
642 exit_value = FSCK_NONDESTRUCT;
643 fs->super->s_state = EXT2_VALID_FS;
645 fs->super->s_state &= ~EXT2_VALID_FS;
646 fs->super->s_mnt_count = 0;
647 fs->super->s_lastcheck = time(NULL);
648 ext2fs_mark_super_dirty(fs);
652 e2fsck_write_bitmaps(ctx);
655 #ifdef RESOURCE_TRACK
656 if (ctx->options & E2F_OPT_TIME)
657 print_resource_track(NULL, &ctx->global_rtrack);
660 e2fsck_free_context(ctx);