Contents of /trunk/mkinitrd-magellan/busybox/e2fsprogs/old_e2fsprogs/tune2fs.c
Parent Directory | Revision Log
Revision 984 -
(show annotations)
(download)
Sun May 30 11:32:42 2010 UTC (13 years, 11 months ago) by niro
File MIME type: text/plain
File size: 19374 byte(s)
Sun May 30 11:32:42 2010 UTC (13 years, 11 months ago) by niro
File MIME type: text/plain
File size: 19374 byte(s)
-updated to busybox-1.16.1 and enabled blkid/uuid support in default config
1 | /* vi: set sw=4 ts=4: */ |
2 | /* |
3 | * tune2fs.c - Change the file system parameters on an ext2 file system |
4 | * |
5 | * Copyright (C) 1992, 1993, 1994 Remy Card <card@masi.ibp.fr> |
6 | * Laboratoire MASI, Institut Blaise Pascal |
7 | * Universite Pierre et Marie Curie (Paris VI) |
8 | * |
9 | * Copyright 1995, 1996, 1997, 1998, 1999, 2000 by Theodore Ts'o. |
10 | * |
11 | * Licensed under GPLv2, see file LICENSE in this tarball for details. |
12 | */ |
13 | |
14 | /* |
15 | * History: |
16 | * 93/06/01 - Creation |
17 | * 93/10/31 - Added the -c option to change the maximal mount counts |
18 | * 93/12/14 - Added -l flag to list contents of superblock |
19 | * M.J.E. Mol (marcel@duteca.et.tudelft.nl) |
20 | * F.W. ten Wolde (franky@duteca.et.tudelft.nl) |
21 | * 93/12/29 - Added the -e option to change errors behavior |
22 | * 94/02/27 - Ported to use the ext2fs library |
23 | * 94/03/06 - Added the checks interval from Uwe Ohse (uwe@tirka.gun.de) |
24 | */ |
25 | |
26 | #include <sys/types.h> |
27 | #include <fcntl.h> |
28 | #include <stdio.h> |
29 | #include <stdlib.h> |
30 | #include <string.h> |
31 | #include <time.h> |
32 | #include <unistd.h> |
33 | #include <getopt.h> |
34 | |
35 | #include "e2fsbb.h" |
36 | #include "ext2fs/ext2_fs.h" |
37 | #include "ext2fs/ext2fs.h" |
38 | #include "uuid/uuid.h" |
39 | #include "e2p/e2p.h" |
40 | #include "ext2fs/kernel-jbd.h" |
41 | #include "util.h" |
42 | #include "blkid/blkid.h" |
43 | |
44 | #include "libbb.h" |
45 | |
46 | static char * device_name = NULL; |
47 | static char * new_label, *new_last_mounted, *new_UUID; |
48 | static char * io_options; |
49 | static int c_flag, C_flag, e_flag, f_flag, g_flag, i_flag, l_flag, L_flag; |
50 | static int m_flag, M_flag, r_flag, s_flag = -1, u_flag, U_flag, T_flag; |
51 | static time_t last_check_time; |
52 | static int print_label; |
53 | static int max_mount_count, mount_count, mount_flags; |
54 | static unsigned long interval, reserved_blocks; |
55 | static unsigned reserved_ratio; |
56 | static unsigned long resgid, resuid; |
57 | static unsigned short errors; |
58 | static int open_flag; |
59 | static char *features_cmd; |
60 | static char *mntopts_cmd; |
61 | |
62 | static int journal_size, journal_flags; |
63 | static char *journal_device = NULL; |
64 | |
65 | static const char *please_fsck = "Please run e2fsck on the filesystem\n"; |
66 | |
67 | static __u32 ok_features[3] = { |
68 | EXT3_FEATURE_COMPAT_HAS_JOURNAL | EXT2_FEATURE_COMPAT_DIR_INDEX, |
69 | EXT2_FEATURE_INCOMPAT_FILETYPE, |
70 | EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER |
71 | }; |
72 | |
73 | /* |
74 | * Remove an external journal from the filesystem |
75 | */ |
76 | static void remove_journal_device(ext2_filsys fs) |
77 | { |
78 | char *journal_path; |
79 | ext2_filsys jfs; |
80 | char buf[1024]; |
81 | journal_superblock_t *jsb; |
82 | int i, nr_users; |
83 | errcode_t retval; |
84 | int commit_remove_journal = 0; |
85 | io_manager io_ptr; |
86 | |
87 | if (f_flag) |
88 | commit_remove_journal = 1; /* force removal even if error */ |
89 | |
90 | uuid_unparse(fs->super->s_journal_uuid, buf); |
91 | journal_path = blkid_get_devname(NULL, "UUID", buf); |
92 | |
93 | if (!journal_path) { |
94 | journal_path = |
95 | ext2fs_find_block_device(fs->super->s_journal_dev); |
96 | if (!journal_path) |
97 | return; |
98 | } |
99 | |
100 | io_ptr = unix_io_manager; |
101 | retval = ext2fs_open(journal_path, EXT2_FLAG_RW| |
102 | EXT2_FLAG_JOURNAL_DEV_OK, 0, |
103 | fs->blocksize, io_ptr, &jfs); |
104 | if (retval) { |
105 | bb_error_msg("Failed to open external journal"); |
106 | goto no_valid_journal; |
107 | } |
108 | if (!(jfs->super->s_feature_incompat & EXT3_FEATURE_INCOMPAT_JOURNAL_DEV)) { |
109 | bb_error_msg("%s is not a journal device", journal_path); |
110 | goto no_valid_journal; |
111 | } |
112 | |
113 | /* Get the journal superblock */ |
114 | if ((retval = io_channel_read_blk(jfs->io, 1, -1024, buf))) { |
115 | bb_error_msg("Failed to read journal superblock"); |
116 | goto no_valid_journal; |
117 | } |
118 | |
119 | jsb = (journal_superblock_t *) buf; |
120 | if ((jsb->s_header.h_magic != (unsigned) ntohl(JFS_MAGIC_NUMBER)) || |
121 | (jsb->s_header.h_blocktype != (unsigned) ntohl(JFS_SUPERBLOCK_V2))) { |
122 | bb_error_msg("Journal superblock not found!"); |
123 | goto no_valid_journal; |
124 | } |
125 | |
126 | /* Find the filesystem UUID */ |
127 | nr_users = ntohl(jsb->s_nr_users); |
128 | for (i=0; i < nr_users; i++) { |
129 | if (memcmp(fs->super->s_uuid, |
130 | &jsb->s_users[i*16], 16) == 0) |
131 | break; |
132 | } |
133 | if (i >= nr_users) { |
134 | bb_error_msg("Filesystem's UUID not found on journal device"); |
135 | commit_remove_journal = 1; |
136 | goto no_valid_journal; |
137 | } |
138 | nr_users--; |
139 | for (i=0; i < nr_users; i++) |
140 | memcpy(&jsb->s_users[i*16], &jsb->s_users[(i+1)*16], 16); |
141 | jsb->s_nr_users = htonl(nr_users); |
142 | |
143 | /* Write back the journal superblock */ |
144 | if ((retval = io_channel_write_blk(jfs->io, 1, -1024, buf))) { |
145 | bb_error_msg("Failed to write journal superblock"); |
146 | goto no_valid_journal; |
147 | } |
148 | |
149 | commit_remove_journal = 1; |
150 | |
151 | no_valid_journal: |
152 | if (commit_remove_journal == 0) |
153 | bb_error_msg_and_die("Journal NOT removed"); |
154 | fs->super->s_journal_dev = 0; |
155 | uuid_clear(fs->super->s_journal_uuid); |
156 | ext2fs_mark_super_dirty(fs); |
157 | puts("Journal removed"); |
158 | free(journal_path); |
159 | } |
160 | |
161 | /* Helper function for remove_journal_inode */ |
162 | static int release_blocks_proc(ext2_filsys fs, blk_t *blocknr, |
163 | int blockcnt EXT2FS_ATTR((unused)), |
164 | void *private EXT2FS_ATTR((unused))) |
165 | { |
166 | blk_t block; |
167 | int group; |
168 | |
169 | block = *blocknr; |
170 | ext2fs_unmark_block_bitmap(fs->block_map,block); |
171 | group = ext2fs_group_of_blk(fs, block); |
172 | fs->group_desc[group].bg_free_blocks_count++; |
173 | fs->super->s_free_blocks_count++; |
174 | return 0; |
175 | } |
176 | |
177 | /* |
178 | * Remove the journal inode from the filesystem |
179 | */ |
180 | static void remove_journal_inode(ext2_filsys fs) |
181 | { |
182 | struct ext2_inode inode; |
183 | errcode_t retval; |
184 | ino_t ino = fs->super->s_journal_inum; |
185 | char *msg = "to read"; |
186 | char *s = "journal inode"; |
187 | |
188 | retval = ext2fs_read_inode(fs, ino, &inode); |
189 | if (retval) |
190 | goto REMOVE_JOURNAL_INODE_ERROR; |
191 | if (ino == EXT2_JOURNAL_INO) { |
192 | retval = ext2fs_read_bitmaps(fs); |
193 | if (retval) { |
194 | msg = "to read bitmaps"; |
195 | s = ""; |
196 | goto REMOVE_JOURNAL_INODE_ERROR; |
197 | } |
198 | retval = ext2fs_block_iterate(fs, ino, 0, NULL, |
199 | release_blocks_proc, NULL); |
200 | if (retval) { |
201 | msg = "clearing"; |
202 | goto REMOVE_JOURNAL_INODE_ERROR; |
203 | } |
204 | memset(&inode, 0, sizeof(inode)); |
205 | ext2fs_mark_bb_dirty(fs); |
206 | fs->flags &= ~EXT2_FLAG_SUPER_ONLY; |
207 | } else |
208 | inode.i_flags &= ~EXT2_IMMUTABLE_FL; |
209 | retval = ext2fs_write_inode(fs, ino, &inode); |
210 | if (retval) { |
211 | msg = "writing"; |
212 | REMOVE_JOURNAL_INODE_ERROR: |
213 | bb_error_msg_and_die("Failed %s %s", msg, s); |
214 | } |
215 | fs->super->s_journal_inum = 0; |
216 | ext2fs_mark_super_dirty(fs); |
217 | } |
218 | |
219 | /* |
220 | * Update the default mount options |
221 | */ |
222 | static void update_mntopts(ext2_filsys fs, char *mntopts) |
223 | { |
224 | struct ext2_super_block *sb= fs->super; |
225 | |
226 | if (e2p_edit_mntopts(mntopts, &sb->s_default_mount_opts, ~0)) |
227 | bb_error_msg_and_die("Invalid mount option set: %s", mntopts); |
228 | ext2fs_mark_super_dirty(fs); |
229 | } |
230 | |
231 | /* |
232 | * Update the feature set as provided by the user. |
233 | */ |
234 | static void update_feature_set(ext2_filsys fs, char *features) |
235 | { |
236 | int sparse, old_sparse, filetype, old_filetype; |
237 | int journal, old_journal, dxdir, old_dxdir; |
238 | struct ext2_super_block *sb= fs->super; |
239 | __u32 old_compat, old_incompat, old_ro_compat; |
240 | |
241 | old_compat = sb->s_feature_compat; |
242 | old_ro_compat = sb->s_feature_ro_compat; |
243 | old_incompat = sb->s_feature_incompat; |
244 | |
245 | old_sparse = sb->s_feature_ro_compat & |
246 | EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER; |
247 | old_filetype = sb->s_feature_incompat & |
248 | EXT2_FEATURE_INCOMPAT_FILETYPE; |
249 | old_journal = sb->s_feature_compat & |
250 | EXT3_FEATURE_COMPAT_HAS_JOURNAL; |
251 | old_dxdir = sb->s_feature_compat & |
252 | EXT2_FEATURE_COMPAT_DIR_INDEX; |
253 | if (e2p_edit_feature(features, &sb->s_feature_compat, ok_features)) |
254 | bb_error_msg_and_die("Invalid filesystem option set: %s", features); |
255 | sparse = sb->s_feature_ro_compat & |
256 | EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER; |
257 | filetype = sb->s_feature_incompat & |
258 | EXT2_FEATURE_INCOMPAT_FILETYPE; |
259 | journal = sb->s_feature_compat & |
260 | EXT3_FEATURE_COMPAT_HAS_JOURNAL; |
261 | dxdir = sb->s_feature_compat & |
262 | EXT2_FEATURE_COMPAT_DIR_INDEX; |
263 | if (old_journal && !journal) { |
264 | if ((mount_flags & EXT2_MF_MOUNTED) && |
265 | !(mount_flags & EXT2_MF_READONLY)) { |
266 | bb_error_msg_and_die( |
267 | "The has_journal flag may only be " |
268 | "cleared when the filesystem is\n" |
269 | "unmounted or mounted " |
270 | "read-only"); |
271 | } |
272 | if (sb->s_feature_incompat & |
273 | EXT3_FEATURE_INCOMPAT_RECOVER) { |
274 | bb_error_msg_and_die( |
275 | "The needs_recovery flag is set. " |
276 | "%s before clearing the has_journal flag.", |
277 | please_fsck); |
278 | } |
279 | if (sb->s_journal_inum) { |
280 | remove_journal_inode(fs); |
281 | } |
282 | if (sb->s_journal_dev) { |
283 | remove_journal_device(fs); |
284 | } |
285 | } |
286 | if (journal && !old_journal) { |
287 | /* |
288 | * If adding a journal flag, let the create journal |
289 | * code below handle creating setting the flag and |
290 | * creating the journal. We supply a default size if |
291 | * necessary. |
292 | */ |
293 | if (!journal_size) |
294 | journal_size = -1; |
295 | sb->s_feature_compat &= ~EXT3_FEATURE_COMPAT_HAS_JOURNAL; |
296 | } |
297 | if (dxdir && !old_dxdir) { |
298 | if (!sb->s_def_hash_version) |
299 | sb->s_def_hash_version = EXT2_HASH_TEA; |
300 | if (uuid_is_null((unsigned char *) sb->s_hash_seed)) |
301 | uuid_generate((unsigned char *) sb->s_hash_seed); |
302 | } |
303 | |
304 | if (sb->s_rev_level == EXT2_GOOD_OLD_REV && |
305 | (sb->s_feature_compat || sb->s_feature_ro_compat || |
306 | sb->s_feature_incompat)) |
307 | ext2fs_update_dynamic_rev(fs); |
308 | if ((sparse != old_sparse) || |
309 | (filetype != old_filetype)) { |
310 | sb->s_state &= ~EXT2_VALID_FS; |
311 | printf("\n%s\n", please_fsck); |
312 | } |
313 | if ((old_compat != sb->s_feature_compat) || |
314 | (old_ro_compat != sb->s_feature_ro_compat) || |
315 | (old_incompat != sb->s_feature_incompat)) |
316 | ext2fs_mark_super_dirty(fs); |
317 | } |
318 | |
319 | /* |
320 | * Add a journal to the filesystem. |
321 | */ |
322 | static void add_journal(ext2_filsys fs) |
323 | { |
324 | if (fs->super->s_feature_compat & |
325 | EXT3_FEATURE_COMPAT_HAS_JOURNAL) { |
326 | bb_error_msg_and_die("The filesystem already has a journal"); |
327 | } |
328 | if (journal_device) { |
329 | make_journal_device(journal_device, fs, 0, 0); |
330 | } else if (journal_size) { |
331 | make_journal_blocks(fs, journal_size, journal_flags, 0); |
332 | /* |
333 | * If the filesystem wasn't mounted, we need to force |
334 | * the block group descriptors out. |
335 | */ |
336 | if ((mount_flags & EXT2_MF_MOUNTED) == 0) |
337 | fs->flags &= ~EXT2_FLAG_SUPER_ONLY; |
338 | } |
339 | print_check_message(fs); |
340 | } |
341 | |
342 | /* |
343 | * Busybox stuff |
344 | */ |
345 | static char * x_blkid_get_devname(const char *token) |
346 | { |
347 | char * dev_name; |
348 | |
349 | if (!(dev_name = blkid_get_devname(NULL, token, NULL))) |
350 | bb_error_msg_and_die("Unable to resolve '%s'", token); |
351 | return dev_name; |
352 | } |
353 | |
354 | #ifdef CONFIG_E2LABEL |
355 | static void parse_e2label_options(int argc, char ** argv) |
356 | { |
357 | if ((argc < 2) || (argc > 3)) |
358 | bb_show_usage(); |
359 | io_options = strchr(argv[1], '?'); |
360 | if (io_options) |
361 | *io_options++ = 0; |
362 | device_name = x_blkid_get_devname(argv[1]); |
363 | if (argc == 3) { |
364 | open_flag = EXT2_FLAG_RW | EXT2_FLAG_JOURNAL_DEV_OK; |
365 | L_flag = 1; |
366 | new_label = argv[2]; |
367 | } else |
368 | print_label++; |
369 | } |
370 | #else |
371 | #define parse_e2label_options(x,y) |
372 | #endif |
373 | |
374 | static time_t parse_time(char *str) |
375 | { |
376 | struct tm ts; |
377 | |
378 | if (strcmp(str, "now") == 0) { |
379 | return time(0); |
380 | } |
381 | memset(&ts, 0, sizeof(ts)); |
382 | #ifdef HAVE_STRPTIME |
383 | strptime(str, "%Y%m%d%H%M%S", &ts); |
384 | #else |
385 | sscanf(str, "%4d%2d%2d%2d%2d%2d", &ts.tm_year, &ts.tm_mon, |
386 | &ts.tm_mday, &ts.tm_hour, &ts.tm_min, &ts.tm_sec); |
387 | ts.tm_year -= 1900; |
388 | ts.tm_mon -= 1; |
389 | if (ts.tm_year < 0 || ts.tm_mon < 0 || ts.tm_mon > 11 || |
390 | ts.tm_mday < 0 || ts.tm_mday > 31 || ts.tm_hour > 23 || |
391 | ts.tm_min > 59 || ts.tm_sec > 61) |
392 | ts.tm_mday = 0; |
393 | #endif |
394 | if (ts.tm_mday == 0) { |
395 | bb_error_msg_and_die("can't parse date/time specifier: %s", str); |
396 | } |
397 | return mktime(&ts); |
398 | } |
399 | |
400 | static void parse_tune2fs_options(int argc, char **argv) |
401 | { |
402 | int c; |
403 | char * tmp; |
404 | |
405 | printf("tune2fs %s (%s)\n", E2FSPROGS_VERSION, E2FSPROGS_DATE); |
406 | while ((c = getopt(argc, argv, "c:e:fg:i:jlm:o:r:s:u:C:J:L:M:O:T:U:")) != EOF) |
407 | switch (c) |
408 | { |
409 | case 'c': |
410 | max_mount_count = xatou_range(optarg, 0, 16000); |
411 | if (max_mount_count == 0) |
412 | max_mount_count = -1; |
413 | c_flag = 1; |
414 | open_flag = EXT2_FLAG_RW; |
415 | break; |
416 | case 'C': |
417 | mount_count = xatou_range(optarg, 0, 16000); |
418 | C_flag = 1; |
419 | open_flag = EXT2_FLAG_RW; |
420 | break; |
421 | case 'e': |
422 | if (strcmp (optarg, "continue") == 0) |
423 | errors = EXT2_ERRORS_CONTINUE; |
424 | else if (strcmp (optarg, "remount-ro") == 0) |
425 | errors = EXT2_ERRORS_RO; |
426 | else if (strcmp (optarg, "panic") == 0) |
427 | errors = EXT2_ERRORS_PANIC; |
428 | else { |
429 | bb_error_msg_and_die("bad error behavior - %s", optarg); |
430 | } |
431 | e_flag = 1; |
432 | open_flag = EXT2_FLAG_RW; |
433 | break; |
434 | case 'f': /* Force */ |
435 | f_flag = 1; |
436 | break; |
437 | case 'g': |
438 | resgid = bb_strtoul(optarg, NULL, 10); |
439 | if (errno) |
440 | resgid = xgroup2gid(optarg); |
441 | g_flag = 1; |
442 | open_flag = EXT2_FLAG_RW; |
443 | break; |
444 | case 'i': |
445 | interval = strtoul(optarg, &tmp, 0); |
446 | switch (*tmp) { |
447 | case 's': |
448 | tmp++; |
449 | break; |
450 | case '\0': |
451 | case 'd': |
452 | case 'D': /* days */ |
453 | interval *= 86400; |
454 | if (*tmp != '\0') |
455 | tmp++; |
456 | break; |
457 | case 'm': |
458 | case 'M': /* months! */ |
459 | interval *= 86400 * 30; |
460 | tmp++; |
461 | break; |
462 | case 'w': |
463 | case 'W': /* weeks */ |
464 | interval *= 86400 * 7; |
465 | tmp++; |
466 | break; |
467 | } |
468 | if (*tmp || interval > (365 * 86400)) { |
469 | bb_error_msg_and_die("bad interval - %s", optarg); |
470 | } |
471 | i_flag = 1; |
472 | open_flag = EXT2_FLAG_RW; |
473 | break; |
474 | case 'j': |
475 | if (!journal_size) |
476 | journal_size = -1; |
477 | open_flag = EXT2_FLAG_RW; |
478 | break; |
479 | case 'J': |
480 | parse_journal_opts(&journal_device, &journal_flags, &journal_size, optarg); |
481 | open_flag = EXT2_FLAG_RW; |
482 | break; |
483 | case 'l': |
484 | l_flag = 1; |
485 | break; |
486 | case 'L': |
487 | new_label = optarg; |
488 | L_flag = 1; |
489 | open_flag = EXT2_FLAG_RW | |
490 | EXT2_FLAG_JOURNAL_DEV_OK; |
491 | break; |
492 | case 'm': |
493 | reserved_ratio = xatou_range(optarg, 0, 50); |
494 | m_flag = 1; |
495 | open_flag = EXT2_FLAG_RW; |
496 | break; |
497 | case 'M': |
498 | new_last_mounted = optarg; |
499 | M_flag = 1; |
500 | open_flag = EXT2_FLAG_RW; |
501 | break; |
502 | case 'o': |
503 | if (mntopts_cmd) { |
504 | bb_error_msg_and_die("-o may only be specified once"); |
505 | } |
506 | mntopts_cmd = optarg; |
507 | open_flag = EXT2_FLAG_RW; |
508 | break; |
509 | |
510 | case 'O': |
511 | if (features_cmd) { |
512 | bb_error_msg_and_die("-O may only be specified once"); |
513 | } |
514 | features_cmd = optarg; |
515 | open_flag = EXT2_FLAG_RW; |
516 | break; |
517 | case 'r': |
518 | reserved_blocks = xatoul(optarg); |
519 | r_flag = 1; |
520 | open_flag = EXT2_FLAG_RW; |
521 | break; |
522 | case 's': |
523 | s_flag = atoi(optarg); |
524 | open_flag = EXT2_FLAG_RW; |
525 | break; |
526 | case 'T': |
527 | T_flag = 1; |
528 | last_check_time = parse_time(optarg); |
529 | open_flag = EXT2_FLAG_RW; |
530 | break; |
531 | case 'u': |
532 | resuid = bb_strtoul(optarg, NULL, 10); |
533 | if (errno) |
534 | resuid = xuname2uid(optarg); |
535 | u_flag = 1; |
536 | open_flag = EXT2_FLAG_RW; |
537 | break; |
538 | case 'U': |
539 | new_UUID = optarg; |
540 | U_flag = 1; |
541 | open_flag = EXT2_FLAG_RW | |
542 | EXT2_FLAG_JOURNAL_DEV_OK; |
543 | break; |
544 | default: |
545 | bb_show_usage(); |
546 | } |
547 | if (optind < argc - 1 || optind == argc) |
548 | bb_show_usage(); |
549 | if (!open_flag && !l_flag) |
550 | bb_show_usage(); |
551 | io_options = strchr(argv[optind], '?'); |
552 | if (io_options) |
553 | *io_options++ = 0; |
554 | device_name = x_blkid_get_devname(argv[optind]); |
555 | } |
556 | |
557 | static void tune2fs_clean_up(void) |
558 | { |
559 | if (ENABLE_FEATURE_CLEAN_UP && device_name) free(device_name); |
560 | if (ENABLE_FEATURE_CLEAN_UP && journal_device) free(journal_device); |
561 | } |
562 | |
563 | int tune2fs_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; |
564 | int tune2fs_main(int argc, char **argv) |
565 | { |
566 | errcode_t retval; |
567 | ext2_filsys fs; |
568 | struct ext2_super_block *sb; |
569 | io_manager io_ptr; |
570 | |
571 | if (ENABLE_FEATURE_CLEAN_UP) |
572 | atexit(tune2fs_clean_up); |
573 | |
574 | if (ENABLE_E2LABEL && (applet_name[0] == 'e')) /* e2label */ |
575 | parse_e2label_options(argc, argv); |
576 | else |
577 | parse_tune2fs_options(argc, argv); /* tune2fs */ |
578 | |
579 | io_ptr = unix_io_manager; |
580 | retval = ext2fs_open2(device_name, io_options, open_flag, |
581 | 0, 0, io_ptr, &fs); |
582 | if (retval) |
583 | bb_error_msg_and_die("No valid superblock on %s", device_name); |
584 | sb = fs->super; |
585 | if (print_label) { |
586 | /* For e2label emulation */ |
587 | printf("%.*s\n", (int) sizeof(sb->s_volume_name), |
588 | sb->s_volume_name); |
589 | return 0; |
590 | } |
591 | retval = ext2fs_check_if_mounted(device_name, &mount_flags); |
592 | if (retval) |
593 | bb_error_msg_and_die("can't determine if %s is mounted", device_name); |
594 | /* Normally we only need to write out the superblock */ |
595 | fs->flags |= EXT2_FLAG_SUPER_ONLY; |
596 | |
597 | if (c_flag) { |
598 | sb->s_max_mnt_count = max_mount_count; |
599 | ext2fs_mark_super_dirty(fs); |
600 | printf("Setting maximal mount count to %d\n", max_mount_count); |
601 | } |
602 | if (C_flag) { |
603 | sb->s_mnt_count = mount_count; |
604 | ext2fs_mark_super_dirty(fs); |
605 | printf("Setting current mount count to %d\n", mount_count); |
606 | } |
607 | if (e_flag) { |
608 | sb->s_errors = errors; |
609 | ext2fs_mark_super_dirty(fs); |
610 | printf("Setting error behavior to %d\n", errors); |
611 | } |
612 | if (g_flag) { |
613 | sb->s_def_resgid = resgid; |
614 | ext2fs_mark_super_dirty(fs); |
615 | printf("Setting reserved blocks gid to %lu\n", resgid); |
616 | } |
617 | if (i_flag) { |
618 | sb->s_checkinterval = interval; |
619 | ext2fs_mark_super_dirty(fs); |
620 | printf("Setting interval between check %lu seconds\n", interval); |
621 | } |
622 | if (m_flag) { |
623 | sb->s_r_blocks_count = (sb->s_blocks_count / 100) |
624 | * reserved_ratio; |
625 | ext2fs_mark_super_dirty(fs); |
626 | printf("Setting reserved blocks percentage to %u (%u blocks)\n", |
627 | reserved_ratio, sb->s_r_blocks_count); |
628 | } |
629 | if (r_flag) { |
630 | if (reserved_blocks >= sb->s_blocks_count/2) |
631 | bb_error_msg_and_die("reserved blocks count is too big (%lu)", reserved_blocks); |
632 | sb->s_r_blocks_count = reserved_blocks; |
633 | ext2fs_mark_super_dirty(fs); |
634 | printf("Setting reserved blocks count to %lu\n", reserved_blocks); |
635 | } |
636 | if (s_flag == 1) { |
637 | if (sb->s_feature_ro_compat & |
638 | EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER) |
639 | bb_error_msg("\nThe filesystem already has sparse superblocks"); |
640 | else { |
641 | sb->s_feature_ro_compat |= |
642 | EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER; |
643 | sb->s_state &= ~EXT2_VALID_FS; |
644 | ext2fs_mark_super_dirty(fs); |
645 | printf("\nSparse superblock flag set. %s", please_fsck); |
646 | } |
647 | } |
648 | if (s_flag == 0) { |
649 | if (!(sb->s_feature_ro_compat & |
650 | EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER)) |
651 | bb_error_msg("\nThe filesystem already has sparse superblocks disabled"); |
652 | else { |
653 | sb->s_feature_ro_compat &= |
654 | ~EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER; |
655 | sb->s_state &= ~EXT2_VALID_FS; |
656 | fs->flags |= EXT2_FLAG_MASTER_SB_ONLY; |
657 | ext2fs_mark_super_dirty(fs); |
658 | printf("\nSparse superblock flag cleared. %s", please_fsck); |
659 | } |
660 | } |
661 | if (T_flag) { |
662 | sb->s_lastcheck = last_check_time; |
663 | ext2fs_mark_super_dirty(fs); |
664 | printf("Setting time filesystem last checked to %s\n", |
665 | ctime(&last_check_time)); |
666 | } |
667 | if (u_flag) { |
668 | sb->s_def_resuid = resuid; |
669 | ext2fs_mark_super_dirty(fs); |
670 | printf("Setting reserved blocks uid to %lu\n", resuid); |
671 | } |
672 | if (L_flag) { |
673 | if (strlen(new_label) > sizeof(sb->s_volume_name)) |
674 | bb_error_msg("Warning: label too long, truncating"); |
675 | memset(sb->s_volume_name, 0, sizeof(sb->s_volume_name)); |
676 | safe_strncpy(sb->s_volume_name, new_label, |
677 | sizeof(sb->s_volume_name)); |
678 | ext2fs_mark_super_dirty(fs); |
679 | } |
680 | if (M_flag) { |
681 | memset(sb->s_last_mounted, 0, sizeof(sb->s_last_mounted)); |
682 | safe_strncpy(sb->s_last_mounted, new_last_mounted, |
683 | sizeof(sb->s_last_mounted)); |
684 | ext2fs_mark_super_dirty(fs); |
685 | } |
686 | if (mntopts_cmd) |
687 | update_mntopts(fs, mntopts_cmd); |
688 | if (features_cmd) |
689 | update_feature_set(fs, features_cmd); |
690 | if (journal_size || journal_device) |
691 | add_journal(fs); |
692 | |
693 | if (U_flag) { |
694 | if ((strcasecmp(new_UUID, "null") == 0) || |
695 | (strcasecmp(new_UUID, "clear") == 0)) { |
696 | uuid_clear(sb->s_uuid); |
697 | } else if (strcasecmp(new_UUID, "time") == 0) { |
698 | uuid_generate_time(sb->s_uuid); |
699 | } else if (strcasecmp(new_UUID, "random") == 0) { |
700 | uuid_generate(sb->s_uuid); |
701 | } else if (uuid_parse(new_UUID, sb->s_uuid)) { |
702 | bb_error_msg_and_die("Invalid UUID format"); |
703 | } |
704 | ext2fs_mark_super_dirty(fs); |
705 | } |
706 | |
707 | if (l_flag) |
708 | list_super (sb); |
709 | return (ext2fs_close (fs) ? 1 : 0); |
710 | } |