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-rw-r--r--e2fsprogs/tune2fs.c776
1 files changed, 776 insertions, 0 deletions
diff --git a/e2fsprogs/tune2fs.c b/e2fsprogs/tune2fs.c
new file mode 100644
index 000000000..e4f904ea0
--- /dev/null
+++ b/e2fsprogs/tune2fs.c
@@ -0,0 +1,776 @@
1/*
2 * tune2fs.c - Change the file system parameters on an ext2 file system
3 *
4 * Copyright (C) 1992, 1993, 1994 Remy Card <card@masi.ibp.fr>
5 * Laboratoire MASI, Institut Blaise Pascal
6 * Universite Pierre et Marie Curie (Paris VI)
7 *
8 * Copyright 1995, 1996, 1997, 1998, 1999, 2000 by Theodore Ts'o.
9 *
10 * %Begin-Header%
11 * This file may be redistributed under the terms of the GNU Public
12 * License.
13 * %End-Header%
14 */
15
16/*
17 * History:
18 * 93/06/01 - Creation
19 * 93/10/31 - Added the -c option to change the maximal mount counts
20 * 93/12/14 - Added -l flag to list contents of superblock
21 * M.J.E. Mol (marcel@duteca.et.tudelft.nl)
22 * F.W. ten Wolde (franky@duteca.et.tudelft.nl)
23 * 93/12/29 - Added the -e option to change errors behavior
24 * 94/02/27 - Ported to use the ext2fs library
25 * 94/03/06 - Added the checks interval from Uwe Ohse (uwe@tirka.gun.de)
26 */
27
28#include <fcntl.h>
29#include <grp.h>
30#ifdef HAVE_GETOPT_H
31#include <getopt.h>
32#else
33extern char *optarg;
34extern int optind;
35#endif
36#include <pwd.h>
37#include <stdio.h>
38#include <stdlib.h>
39#include <string.h>
40#include <time.h>
41#include <unistd.h>
42#include <sys/types.h>
43
44#include "e2fsbb.h"
45#include "ext2fs/ext2_fs.h"
46#include "ext2fs/ext2fs.h"
47#include "uuid/uuid.h"
48#include "e2p/e2p.h"
49#include "ext2fs/jfs_user.h"
50#include "util.h"
51#include "blkid/blkid.h"
52
53static char * device_name;
54static char * new_label, *new_last_mounted, *new_UUID;
55static char * io_options;
56static int c_flag, C_flag, e_flag, f_flag, g_flag, i_flag, l_flag, L_flag;
57static int m_flag, M_flag, r_flag, s_flag = -1, u_flag, U_flag, T_flag;
58static time_t last_check_time;
59static int print_label;
60static int max_mount_count, mount_count, mount_flags;
61static unsigned long interval, reserved_ratio, reserved_blocks;
62static unsigned long resgid, resuid;
63static unsigned short errors;
64static int open_flag;
65static char *features_cmd;
66static char *mntopts_cmd;
67
68static int journal_size, journal_flags;
69static char *journal_device;
70
71static const char *please_fsck = "Please run e2fsck on the filesystem\n";
72
73static __u32 ok_features[3] = {
74 EXT3_FEATURE_COMPAT_HAS_JOURNAL | EXT2_FEATURE_COMPAT_DIR_INDEX,
75 EXT2_FEATURE_INCOMPAT_FILETYPE,
76 EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER
77};
78
79/*
80 * Remove an external journal from the filesystem
81 */
82static void remove_journal_device(ext2_filsys fs)
83{
84 char *journal_path;
85 ext2_filsys jfs;
86 char buf[1024];
87 journal_superblock_t *jsb;
88 int i, nr_users;
89 errcode_t retval;
90 int commit_remove_journal = 0;
91 io_manager io_ptr;
92
93 if (f_flag)
94 commit_remove_journal = 1; /* force removal even if error */
95
96 uuid_unparse(fs->super->s_journal_uuid, buf);
97 journal_path = blkid_get_devname(NULL, "UUID", buf);
98
99 if (!journal_path) {
100 journal_path =
101 ext2fs_find_block_device(fs->super->s_journal_dev);
102 if (!journal_path)
103 return;
104 }
105
106 io_ptr = unix_io_manager;
107 retval = ext2fs_open(journal_path, EXT2_FLAG_RW|
108 EXT2_FLAG_JOURNAL_DEV_OK, 0,
109 fs->blocksize, io_ptr, &jfs);
110 if (retval) {
111 bb_error_msg("Failed to open external journal");
112 goto no_valid_journal;
113 }
114 if (!(jfs->super->s_feature_incompat & EXT3_FEATURE_INCOMPAT_JOURNAL_DEV)) {
115 bb_error_msg("%s is not a journal device", journal_path);
116 goto no_valid_journal;
117 }
118
119 /* Get the journal superblock */
120 if ((retval = io_channel_read_blk(jfs->io, 1, -1024, buf))) {
121 bb_error_msg("Failed to read journal superblock");
122 goto no_valid_journal;
123 }
124
125 jsb = (journal_superblock_t *) buf;
126 if ((jsb->s_header.h_magic != (unsigned) ntohl(JFS_MAGIC_NUMBER)) ||
127 (jsb->s_header.h_blocktype != (unsigned) ntohl(JFS_SUPERBLOCK_V2))) {
128 bb_error_msg("Journal superblock not found!");
129 goto no_valid_journal;
130 }
131
132 /* Find the filesystem UUID */
133 nr_users = ntohl(jsb->s_nr_users);
134 for (i=0; i < nr_users; i++) {
135 if (memcmp(fs->super->s_uuid,
136 &jsb->s_users[i*16], 16) == 0)
137 break;
138 }
139 if (i >= nr_users) {
140 bb_error_msg("Filesystem's UUID not found on journal device");
141 commit_remove_journal = 1;
142 goto no_valid_journal;
143 }
144 nr_users--;
145 for (i=0; i < nr_users; i++)
146 memcpy(&jsb->s_users[i*16], &jsb->s_users[(i+1)*16], 16);
147 jsb->s_nr_users = htonl(nr_users);
148
149 /* Write back the journal superblock */
150 if ((retval = io_channel_write_blk(jfs->io, 1, -1024, buf))) {
151 bb_error_msg("Failed to write journal superblock");
152 goto no_valid_journal;
153 }
154
155 commit_remove_journal = 1;
156
157no_valid_journal:
158 if (commit_remove_journal == 0)
159 bb_error_msg_and_die("Journal NOT removed");
160 fs->super->s_journal_dev = 0;
161 uuid_clear(fs->super->s_journal_uuid);
162 ext2fs_mark_super_dirty(fs);
163 puts("Journal removed");
164 free(journal_path);
165}
166
167/* Helper function for remove_journal_inode */
168static int release_blocks_proc(ext2_filsys fs, blk_t *blocknr,
169 int blockcnt EXT2FS_ATTR((unused)),
170 void *private EXT2FS_ATTR((unused)))
171{
172 blk_t block;
173 int group;
174
175 block = *blocknr;
176 ext2fs_unmark_block_bitmap(fs->block_map,block);
177 group = ext2fs_group_of_blk(fs, block);
178 fs->group_desc[group].bg_free_blocks_count++;
179 fs->super->s_free_blocks_count++;
180 return 0;
181}
182
183/*
184 * Remove the journal inode from the filesystem
185 */
186static void remove_journal_inode(ext2_filsys fs)
187{
188 struct ext2_inode inode;
189 errcode_t retval;
190 ino_t ino = fs->super->s_journal_inum;
191
192 retval = ext2fs_read_inode(fs, ino, &inode);
193 if (retval)
194 bb_error_msg_and_die("Failed to read journal inode");
195 if (ino == EXT2_JOURNAL_INO) {
196 retval = ext2fs_read_bitmaps(fs);
197 if (retval)
198 bb_error_msg_and_die("Failed to read bitmaps");
199 retval = ext2fs_block_iterate(fs, ino, 0, NULL,
200 release_blocks_proc, NULL);
201 if (retval)
202 bb_error_msg_and_die("Failed clearing journal inode");
203 memset(&inode, 0, sizeof(inode));
204 ext2fs_mark_bb_dirty(fs);
205 fs->flags &= ~EXT2_FLAG_SUPER_ONLY;
206 } else
207 inode.i_flags &= ~EXT2_IMMUTABLE_FL;
208 retval = ext2fs_write_inode(fs, ino, &inode);
209 if (retval)
210 bb_error_msg_and_die("Failed writing journal inode");
211 fs->super->s_journal_inum = 0;
212 ext2fs_mark_super_dirty(fs);
213}
214
215/*
216 * Update the default mount options
217 */
218static void update_mntopts(ext2_filsys fs, char *mntopts)
219{
220 struct ext2_super_block *sb= fs->super;
221
222 if (e2p_edit_mntopts(mntopts, &sb->s_default_mount_opts, ~0))
223 bb_error_msg_and_die("Invalid mount option set: %s", mntopts);
224 ext2fs_mark_super_dirty(fs);
225}
226
227/*
228 * Update the feature set as provided by the user.
229 */
230static void update_feature_set(ext2_filsys fs, char *features)
231{
232 int sparse, old_sparse, filetype, old_filetype;
233 int journal, old_journal, dxdir, old_dxdir;
234 struct ext2_super_block *sb= fs->super;
235 __u32 old_compat, old_incompat, old_ro_compat;
236
237 old_compat = sb->s_feature_compat;
238 old_ro_compat = sb->s_feature_ro_compat;
239 old_incompat = sb->s_feature_incompat;
240
241 old_sparse = sb->s_feature_ro_compat &
242 EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER;
243 old_filetype = sb->s_feature_incompat &
244 EXT2_FEATURE_INCOMPAT_FILETYPE;
245 old_journal = sb->s_feature_compat &
246 EXT3_FEATURE_COMPAT_HAS_JOURNAL;
247 old_dxdir = sb->s_feature_compat &
248 EXT2_FEATURE_COMPAT_DIR_INDEX;
249 if (e2p_edit_feature(features, &sb->s_feature_compat, ok_features))
250 bb_error_msg_and_die("Invalid filesystem option set: %s", features);
251 sparse = sb->s_feature_ro_compat &
252 EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER;
253 filetype = sb->s_feature_incompat &
254 EXT2_FEATURE_INCOMPAT_FILETYPE;
255 journal = sb->s_feature_compat &
256 EXT3_FEATURE_COMPAT_HAS_JOURNAL;
257 dxdir = sb->s_feature_compat &
258 EXT2_FEATURE_COMPAT_DIR_INDEX;
259 if (old_journal && !journal) {
260 if ((mount_flags & EXT2_MF_MOUNTED) &&
261 !(mount_flags & EXT2_MF_READONLY)) {
262 bb_error_msg_and_die(
263 "The has_journal flag may only be "
264 "cleared when the filesystem is\n"
265 "unmounted or mounted "
266 "read-only");
267 }
268 if (sb->s_feature_incompat &
269 EXT3_FEATURE_INCOMPAT_RECOVER) {
270 bb_error_msg_and_die(
271 "The needs_recovery flag is set. "
272 "Please run e2fsck before clearing\n"
273 "the has_journal flag.");
274 }
275 if (sb->s_journal_inum) {
276 remove_journal_inode(fs);
277 }
278 if (sb->s_journal_dev) {
279 remove_journal_device(fs);
280 }
281 }
282 if (journal && !old_journal) {
283 /*
284 * If adding a journal flag, let the create journal
285 * code below handle creating setting the flag and
286 * creating the journal. We supply a default size if
287 * necessary.
288 */
289 if (!journal_size)
290 journal_size = -1;
291 sb->s_feature_compat &= ~EXT3_FEATURE_COMPAT_HAS_JOURNAL;
292 }
293 if (dxdir && !old_dxdir) {
294 if (!sb->s_def_hash_version)
295 sb->s_def_hash_version = EXT2_HASH_TEA;
296 if (uuid_is_null((unsigned char *) sb->s_hash_seed))
297 uuid_generate((unsigned char *) sb->s_hash_seed);
298 }
299
300 if (sb->s_rev_level == EXT2_GOOD_OLD_REV &&
301 (sb->s_feature_compat || sb->s_feature_ro_compat ||
302 sb->s_feature_incompat))
303 ext2fs_update_dynamic_rev(fs);
304 if ((sparse != old_sparse) ||
305 (filetype != old_filetype)) {
306 sb->s_state &= ~EXT2_VALID_FS;
307 printf("\n%s\n", please_fsck);
308 }
309 if ((old_compat != sb->s_feature_compat) ||
310 (old_ro_compat != sb->s_feature_ro_compat) ||
311 (old_incompat != sb->s_feature_incompat))
312 ext2fs_mark_super_dirty(fs);
313}
314
315/*
316 * Add a journal to the filesystem.
317 */
318static void add_journal(ext2_filsys fs)
319{
320 unsigned long journal_blocks;
321 errcode_t retval;
322 ext2_filsys jfs;
323 io_manager io_ptr;
324
325 if (fs->super->s_feature_compat &
326 EXT3_FEATURE_COMPAT_HAS_JOURNAL) {
327 bb_error_msg("The filesystem already has a journal");
328 goto err;
329 }
330 if (journal_device) {
331 check_plausibility(journal_device);
332 check_mount(journal_device, 0, "journal");
333 io_ptr = unix_io_manager;
334 retval = ext2fs_open(journal_device, EXT2_FLAG_RW|
335 EXT2_FLAG_JOURNAL_DEV_OK, 0,
336 fs->blocksize, io_ptr, &jfs);
337 if (retval) {
338 bb_error_msg("Failed to open journal on %s", journal_device);
339 goto err;
340 }
341 printf("Creating journal on device %s: ", journal_device);
342 fflush(stdout);
343
344 retval = ext2fs_add_journal_device(fs, jfs);
345 ext2fs_close(jfs);
346 if (retval) {
347 bb_error_msg("Failed to add filesystem to journal on %s", journal_device);
348 goto err;
349 }
350 puts("done");
351 } else if (journal_size) {
352 fputs("Creating journal inode: ", stdout);
353 fflush(stdout);
354 journal_blocks = figure_journal_size(journal_size, fs);
355
356 retval = ext2fs_add_journal_inode(fs, journal_blocks,
357 journal_flags);
358 if (retval)
359 bb_error_msg_and_die("Failed to create journal file");
360 else
361 puts("done");
362 /*
363 * If the filesystem wasn't mounted, we need to force
364 * the block group descriptors out.
365 */
366 if ((mount_flags & EXT2_MF_MOUNTED) == 0)
367 fs->flags &= ~EXT2_FLAG_SUPER_ONLY;
368 }
369 print_check_message(fs);
370 return;
371
372err:
373 if (journal_device)
374 free(journal_device);
375 exit(1);
376}
377
378
379static void parse_e2label_options(int argc, char ** argv)
380{
381 if ((argc < 2) || (argc > 3))
382 bb_show_usage();
383 io_options = strchr(argv[1], '?');
384 if (io_options)
385 *io_options++ = 0;
386 device_name = blkid_get_devname(NULL, argv[1], NULL);
387 if (!device_name)
388 bb_error_msg_and_die("Unable to resolve '%s'", argv[1]);
389 if (argc == 3) {
390 open_flag = EXT2_FLAG_RW | EXT2_FLAG_JOURNAL_DEV_OK;
391 L_flag = 1;
392 new_label = argv[2];
393 } else
394 print_label++;
395}
396
397static time_t parse_time(char *str)
398{
399 struct tm ts;
400
401 if (strcmp(str, "now") == 0) {
402 return (time(0));
403 }
404 memset(&ts, 0, sizeof(ts));
405#ifdef HAVE_STRPTIME
406 strptime(str, "%Y%m%d%H%M%S", &ts);
407#else
408 sscanf(str, "%4d%2d%2d%2d%2d%2d", &ts.tm_year, &ts.tm_mon,
409 &ts.tm_mday, &ts.tm_hour, &ts.tm_min, &ts.tm_sec);
410 ts.tm_year -= 1900;
411 ts.tm_mon -= 1;
412 if (ts.tm_year < 0 || ts.tm_mon < 0 || ts.tm_mon > 11 ||
413 ts.tm_mday < 0 || ts.tm_mday > 31 || ts.tm_hour > 23 ||
414 ts.tm_min > 59 || ts.tm_sec > 61)
415 ts.tm_mday = 0;
416#endif
417 if (ts.tm_mday == 0) {
418 bb_error_msg_and_die("Couldn't parse date/time specifier: %s", str);
419 }
420 return (mktime(&ts));
421}
422
423static void parse_tune2fs_options(int argc, char **argv)
424{
425 int c;
426 char * tmp;
427 struct group * gr;
428 struct passwd * pw;
429
430 printf("tune2fs %s (%s)\n", E2FSPROGS_VERSION, E2FSPROGS_DATE);
431 while ((c = getopt(argc, argv, "c:e:fg:i:jlm:o:r:s:u:C:J:L:M:O:T:U:")) != EOF)
432 switch (c)
433 {
434 case 'c':
435 max_mount_count = strtol (optarg, &tmp, 0);
436 if (*tmp || max_mount_count > 16000) {
437 bb_error_msg_and_die("bad mounts count - %s", optarg);
438 }
439 if (max_mount_count == 0)
440 max_mount_count = -1;
441 c_flag = 1;
442 open_flag = EXT2_FLAG_RW;
443 break;
444 case 'C':
445 mount_count = strtoul (optarg, &tmp, 0);
446 if (*tmp || mount_count > 16000) {
447 bb_error_msg_and_die("bad mounts count - %s", optarg);
448 }
449 C_flag = 1;
450 open_flag = EXT2_FLAG_RW;
451 break;
452 case 'e':
453 if (strcmp (optarg, "continue") == 0)
454 errors = EXT2_ERRORS_CONTINUE;
455 else if (strcmp (optarg, "remount-ro") == 0)
456 errors = EXT2_ERRORS_RO;
457 else if (strcmp (optarg, "panic") == 0)
458 errors = EXT2_ERRORS_PANIC;
459 else {
460 bb_error_msg_and_die("bad error behavior - %s", optarg);
461 }
462 e_flag = 1;
463 open_flag = EXT2_FLAG_RW;
464 break;
465 case 'f': /* Force */
466 f_flag = 1;
467 break;
468 case 'g':
469 resgid = strtoul (optarg, &tmp, 0);
470 if (*tmp) {
471 gr = getgrnam (optarg);
472 if (gr == NULL)
473 tmp = optarg;
474 else {
475 resgid = gr->gr_gid;
476 *tmp =0;
477 }
478 }
479 if (*tmp) {
480 bb_error_msg_and_die("bad gid/group name - %s", optarg);
481 }
482 g_flag = 1;
483 open_flag = EXT2_FLAG_RW;
484 break;
485 case 'i':
486 interval = strtoul (optarg, &tmp, 0);
487 switch (*tmp) {
488 case 's':
489 tmp++;
490 break;
491 case '\0':
492 case 'd':
493 case 'D': /* days */
494 interval *= 86400;
495 if (*tmp != '\0')
496 tmp++;
497 break;
498 case 'm':
499 case 'M': /* months! */
500 interval *= 86400 * 30;
501 tmp++;
502 break;
503 case 'w':
504 case 'W': /* weeks */
505 interval *= 86400 * 7;
506 tmp++;
507 break;
508 }
509 if (*tmp || interval > (365 * 86400)) {
510 bb_error_msg_and_die("bad interval - %s", optarg);
511 }
512 i_flag = 1;
513 open_flag = EXT2_FLAG_RW;
514 break;
515 case 'j':
516 if (!journal_size)
517 journal_size = -1;
518 open_flag = EXT2_FLAG_RW;
519 break;
520 case 'J':
521 parse_journal_opts(&journal_device, &journal_flags, &journal_size, optarg);
522 open_flag = EXT2_FLAG_RW;
523 break;
524 case 'l':
525 l_flag = 1;
526 break;
527 case 'L':
528 new_label = optarg;
529 L_flag = 1;
530 open_flag = EXT2_FLAG_RW |
531 EXT2_FLAG_JOURNAL_DEV_OK;
532 break;
533 case 'm':
534 reserved_ratio = strtoul (optarg, &tmp, 0);
535 if (*tmp || reserved_ratio > 50) {
536 bb_error_msg_and_die("bad reserved block ratio - %s", optarg);
537 }
538 m_flag = 1;
539 open_flag = EXT2_FLAG_RW;
540 break;
541 case 'M':
542 new_last_mounted = optarg;
543 M_flag = 1;
544 open_flag = EXT2_FLAG_RW;
545 break;
546 case 'o':
547 if (mntopts_cmd) {
548 bb_error_msg_and_die("-o may only be specified once");
549 }
550 mntopts_cmd = optarg;
551 open_flag = EXT2_FLAG_RW;
552 break;
553
554 case 'O':
555 if (features_cmd) {
556 bb_error_msg_and_die("-O may only be specified once");
557 }
558 features_cmd = optarg;
559 open_flag = EXT2_FLAG_RW;
560 break;
561 case 'r':
562 reserved_blocks = strtoul (optarg, &tmp, 0);
563 if (*tmp) {
564 bb_error_msg_and_die("bad reserved blocks count - %s", optarg);
565 }
566 r_flag = 1;
567 open_flag = EXT2_FLAG_RW;
568 break;
569 case 's':
570 s_flag = atoi(optarg);
571 open_flag = EXT2_FLAG_RW;
572 break;
573 case 'T':
574 T_flag = 1;
575 last_check_time = parse_time(optarg);
576 open_flag = EXT2_FLAG_RW;
577 break;
578 case 'u':
579 resuid = strtoul (optarg, &tmp, 0);
580 if (*tmp) {
581 pw = getpwnam (optarg);
582 if (pw == NULL)
583 tmp = optarg;
584 else {
585 resuid = pw->pw_uid;
586 *tmp = 0;
587 }
588 }
589 if (*tmp) {
590 bb_error_msg_and_die("bad uid/user name - %s", optarg);
591 }
592 u_flag = 1;
593 open_flag = EXT2_FLAG_RW;
594 break;
595 case 'U':
596 new_UUID = optarg;
597 U_flag = 1;
598 open_flag = EXT2_FLAG_RW |
599 EXT2_FLAG_JOURNAL_DEV_OK;
600 break;
601 default:
602 bb_show_usage();
603 }
604 if (optind < argc - 1 || optind == argc)
605 bb_show_usage();
606 if (!open_flag && !l_flag)
607 bb_show_usage();
608 io_options = strchr(argv[optind], '?');
609 if (io_options)
610 *io_options++ = 0;
611 device_name = blkid_get_devname(NULL, argv[optind], NULL);
612 if (!device_name)
613 bb_error_msg_and_die("Unable to resolve '%s'", argv[optind]);
614}
615
616static void do_findfs(int argc, char **argv)
617{
618 char *dev;
619
620 if ((argc != 2) ||
621 (strncmp(argv[1], "LABEL=", 6) && strncmp(argv[1], "UUID=", 5)))
622 bb_show_usage();
623 dev = blkid_get_devname(NULL, argv[1], NULL);
624 if (!dev)
625 bb_error_msg_and_die("Unable to resolve '%s'", argv[1]);
626 puts(dev);
627 exit(0);
628}
629
630int tune2fs_main(int argc, char **argv)
631{
632 errcode_t retval;
633 ext2_filsys fs;
634 struct ext2_super_block *sb;
635 io_manager io_ptr;
636 char *program_name = basename(argv[0]);
637
638 if (strcmp(program_name, "findfs") == 0)
639 do_findfs(argc, argv);
640 if (strcmp(program_name, "e2label") == 0)
641 parse_e2label_options(argc, argv);
642 else
643 parse_tune2fs_options(argc, argv);
644
645 io_ptr = unix_io_manager;
646 retval = ext2fs_open2(device_name, io_options, open_flag,
647 0, 0, io_ptr, &fs);
648 if (retval)
649 bb_error_msg_and_die("No valid superblock on %s", device_name);
650 sb = fs->super;
651 if (print_label) {
652 /* For e2label emulation */
653 printf("%.*s\n", (int) sizeof(sb->s_volume_name),
654 sb->s_volume_name);
655 exit(0);
656 }
657 retval = ext2fs_check_if_mounted(device_name, &mount_flags);
658 if (retval)
659 bb_error_msg_and_die("Could not determine if %s is mounted", device_name);
660 /* Normally we only need to write out the superblock */
661 fs->flags |= EXT2_FLAG_SUPER_ONLY;
662
663 if (c_flag) {
664 sb->s_max_mnt_count = max_mount_count;
665 ext2fs_mark_super_dirty(fs);
666 printf("Setting maximal mount count to %d\n", max_mount_count);
667 }
668 if (C_flag) {
669 sb->s_mnt_count = mount_count;
670 ext2fs_mark_super_dirty(fs);
671 printf("Setting current mount count to %d\n", mount_count);
672 }
673 if (e_flag) {
674 sb->s_errors = errors;
675 ext2fs_mark_super_dirty(fs);
676 printf("Setting error behavior to %d\n", errors);
677 }
678 if (g_flag) {
679 sb->s_def_resgid = resgid;
680 ext2fs_mark_super_dirty(fs);
681 printf("Setting reserved blocks gid to %lu\n", resgid);
682 }
683 if (i_flag) {
684 sb->s_checkinterval = interval;
685 ext2fs_mark_super_dirty(fs);
686 printf("Setting interval between check %lu seconds\n", interval);
687 }
688 if (m_flag) {
689 sb->s_r_blocks_count = (sb->s_blocks_count / 100)
690 * reserved_ratio;
691 ext2fs_mark_super_dirty(fs);
692 printf("Setting reserved blocks percentage to %lu (%u blocks)\n",
693 reserved_ratio, sb->s_r_blocks_count);
694 }
695 if (r_flag) {
696 if (reserved_blocks >= sb->s_blocks_count/2)
697 bb_error_msg_and_die("reserved blocks count is too big (%lu)", reserved_blocks);
698 sb->s_r_blocks_count = reserved_blocks;
699 ext2fs_mark_super_dirty(fs);
700 printf("Setting reserved blocks count to %lu\n", reserved_blocks);
701 }
702 if (s_flag == 1) {
703 if (sb->s_feature_ro_compat &
704 EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER)
705 bb_error_msg("\nThe filesystem already has sparse superblocks\n");
706 else {
707 sb->s_feature_ro_compat |=
708 EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER;
709 sb->s_state &= ~EXT2_VALID_FS;
710 ext2fs_mark_super_dirty(fs);
711 printf("\nSparse superblock flag set. %s", please_fsck);
712 }
713 }
714 if (s_flag == 0) {
715 if (!(sb->s_feature_ro_compat &
716 EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER))
717 bb_error_msg("\nThe filesystem already has sparse superblocks disabled\n");
718 else {
719 sb->s_feature_ro_compat &=
720 ~EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER;
721 sb->s_state &= ~EXT2_VALID_FS;
722 fs->flags |= EXT2_FLAG_MASTER_SB_ONLY;
723 ext2fs_mark_super_dirty(fs);
724 printf("\nSparse superblock flag cleared. %s", please_fsck);
725 }
726 }
727 if (T_flag) {
728 sb->s_lastcheck = last_check_time;
729 ext2fs_mark_super_dirty(fs);
730 printf("Setting time filesystem last checked to %s\n",
731 ctime(&last_check_time));
732 }
733 if (u_flag) {
734 sb->s_def_resuid = resuid;
735 ext2fs_mark_super_dirty(fs);
736 printf("Setting reserved blocks uid to %lu\n", resuid);
737 }
738 if (L_flag) {
739 if (strlen(new_label) > sizeof(sb->s_volume_name))
740 bb_error_msg("Warning: label too long, truncating\n");
741 memset(sb->s_volume_name, 0, sizeof(sb->s_volume_name));
742 strncpy(sb->s_volume_name, new_label,
743 sizeof(sb->s_volume_name));
744 ext2fs_mark_super_dirty(fs);
745 }
746 if (M_flag) {
747 memset(sb->s_last_mounted, 0, sizeof(sb->s_last_mounted));
748 strncpy(sb->s_last_mounted, new_last_mounted,
749 sizeof(sb->s_last_mounted));
750 ext2fs_mark_super_dirty(fs);
751 }
752 if (mntopts_cmd)
753 update_mntopts(fs, mntopts_cmd);
754 if (features_cmd)
755 update_feature_set(fs, features_cmd);
756 if (journal_size || journal_device)
757 add_journal(fs);
758
759 if (U_flag) {
760 if ((strcasecmp(new_UUID, "null") == 0) ||
761 (strcasecmp(new_UUID, "clear") == 0)) {
762 uuid_clear(sb->s_uuid);
763 } else if (strcasecmp(new_UUID, "time") == 0) {
764 uuid_generate_time(sb->s_uuid);
765 } else if (strcasecmp(new_UUID, "random") == 0) {
766 uuid_generate(sb->s_uuid);
767 } else if (uuid_parse(new_UUID, sb->s_uuid)) {
768 bb_error_msg_and_die("Invalid UUID format");
769 }
770 ext2fs_mark_super_dirty(fs);
771 }
772
773 if (l_flag)
774 list_super (sb);
775 return (ext2fs_close (fs) ? 1 : 0);
776}
generated by cgit v1.2.3-55-g6feb (git 2.39.1) at 2025-03-22 16:27:00 +0000