tune2fs.c revision a8862d9e90d0d94761ba28dbbf9674308fd7d7c0
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#define _XOPEN_SOURCE 500 /* for inclusion of strptime() */ 29#define _BSD_SOURCE /* for inclusion of strcasecmp() */ 30#include <fcntl.h> 31#include <grp.h> 32#ifdef HAVE_GETOPT_H 33#include <getopt.h> 34#else 35extern char *optarg; 36extern int optind; 37#endif 38#include <pwd.h> 39#include <stdio.h> 40#include <stdlib.h> 41#include <string.h> 42#include <time.h> 43#include <unistd.h> 44#include <sys/types.h> 45 46#include "ext2fs/ext2_fs.h" 47#include "ext2fs/ext2fs.h" 48#include "et/com_err.h" 49#include "uuid/uuid.h" 50#include "e2p/e2p.h" 51#include "jfs_user.h" 52#include "util.h" 53#include "blkid/blkid.h" 54 55#include "../version.h" 56#include "nls-enable.h" 57 58const char * program_name = "tune2fs"; 59char * device_name; 60char * new_label, *new_last_mounted, *new_UUID; 61char * io_options; 62static int c_flag, C_flag, e_flag, f_flag, g_flag, i_flag, l_flag, L_flag; 63static int m_flag, M_flag, r_flag, s_flag = -1, u_flag, U_flag, T_flag; 64static time_t last_check_time; 65static int print_label; 66static int max_mount_count, mount_count, mount_flags; 67static unsigned long interval, reserved_blocks; 68static double reserved_ratio; 69static unsigned long resgid, resuid; 70static unsigned short errors; 71static int open_flag; 72static char *features_cmd; 73static char *mntopts_cmd; 74 75int journal_size, journal_flags; 76char *journal_device; 77 78static const char *please_fsck = N_("Please run e2fsck on the filesystem.\n"); 79 80void do_findfs(int argc, char **argv); 81 82static void usage(void) 83{ 84 fprintf(stderr, 85 _("Usage: %s [-c max_mounts_count] [-e errors_behavior] " 86 "[-g group]\n" 87 "\t[-i interval[d|m|w]] [-j] [-J journal_options]\n" 88 "\t[-l] [-s sparse_flag] [-m reserved_blocks_percent]\n" 89 "\t[-o [^]mount_options[,...]] [-r reserved_blocks_count]\n" 90 "\t[-u user] [-C mount_count] [-L volume_label] " 91 "[-M last_mounted_dir]\n" 92 "\t[-O [^]feature[,...]] [-T last_check_time] [-U UUID]" 93 " device\n"), program_name); 94 exit (1); 95} 96 97static __u32 ok_features[3] = { 98 EXT3_FEATURE_COMPAT_HAS_JOURNAL | 99 EXT2_FEATURE_COMPAT_DIR_INDEX, /* Compat */ 100 EXT2_FEATURE_INCOMPAT_FILETYPE, /* Incompat */ 101 EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER /* R/O compat */ 102}; 103 104/* 105 * Remove an external journal from the filesystem 106 */ 107static void remove_journal_device(ext2_filsys fs) 108{ 109 char *journal_path; 110 ext2_filsys jfs; 111 char buf[1024]; 112 journal_superblock_t *jsb; 113 int i, nr_users; 114 errcode_t retval; 115 int commit_remove_journal = 0; 116 io_manager io_ptr; 117 118 if (f_flag) 119 commit_remove_journal = 1; /* force removal even if error */ 120 121 uuid_unparse(fs->super->s_journal_uuid, buf); 122 journal_path = blkid_get_devname(NULL, "UUID", buf); 123 124 if (!journal_path) { 125 journal_path = 126 ext2fs_find_block_device(fs->super->s_journal_dev); 127 if (!journal_path) 128 return; 129 } 130 131#ifdef CONFIG_TESTIO_DEBUG 132 io_ptr = test_io_manager; 133 test_io_backing_manager = unix_io_manager; 134#else 135 io_ptr = unix_io_manager; 136#endif 137 retval = ext2fs_open(journal_path, EXT2_FLAG_RW| 138 EXT2_FLAG_JOURNAL_DEV_OK, 0, 139 fs->blocksize, io_ptr, &jfs); 140 if (retval) { 141 com_err(program_name, retval, 142 _("while trying to open external journal")); 143 goto no_valid_journal; 144 } 145 if (!(jfs->super->s_feature_incompat & EXT3_FEATURE_INCOMPAT_JOURNAL_DEV)) { 146 fprintf(stderr, _("%s is not a journal device.\n"), 147 journal_path); 148 goto no_valid_journal; 149 } 150 151 /* Get the journal superblock */ 152 if ((retval = io_channel_read_blk(jfs->io, 1, -1024, buf))) { 153 com_err(program_name, retval, 154 _("while reading journal superblock")); 155 goto no_valid_journal; 156 } 157 158 jsb = (journal_superblock_t *) buf; 159 if ((jsb->s_header.h_magic != (unsigned) ntohl(JFS_MAGIC_NUMBER)) || 160 (jsb->s_header.h_blocktype != (unsigned) ntohl(JFS_SUPERBLOCK_V2))) { 161 fputs(_("Journal superblock not found!\n"), stderr); 162 goto no_valid_journal; 163 } 164 165 /* Find the filesystem UUID */ 166 nr_users = ntohl(jsb->s_nr_users); 167 for (i=0; i < nr_users; i++) { 168 if (memcmp(fs->super->s_uuid, 169 &jsb->s_users[i*16], 16) == 0) 170 break; 171 } 172 if (i >= nr_users) { 173 fputs(_("Filesystem's UUID not found on journal device.\n"), 174 stderr); 175 commit_remove_journal = 1; 176 goto no_valid_journal; 177 } 178 nr_users--; 179 for (i=0; i < nr_users; i++) 180 memcpy(&jsb->s_users[i*16], &jsb->s_users[(i+1)*16], 16); 181 jsb->s_nr_users = htonl(nr_users); 182 183 /* Write back the journal superblock */ 184 if ((retval = io_channel_write_blk(jfs->io, 1, -1024, buf))) { 185 com_err(program_name, retval, 186 "while writing journal superblock."); 187 goto no_valid_journal; 188 } 189 190 commit_remove_journal = 1; 191 192no_valid_journal: 193 if (commit_remove_journal == 0) { 194 fputs(_("Journal NOT removed\n"), stderr); 195 exit(1); 196 } 197 fs->super->s_journal_dev = 0; 198 uuid_clear(fs->super->s_journal_uuid); 199 ext2fs_mark_super_dirty(fs); 200 fputs(_("Journal removed\n"), stdout); 201 free(journal_path); 202} 203 204/* Helper function for remove_journal_inode */ 205static int release_blocks_proc(ext2_filsys fs, blk_t *blocknr, 206 int blockcnt EXT2FS_ATTR((unused)), 207 void *private EXT2FS_ATTR((unused))) 208{ 209 blk_t block; 210 int group; 211 212 block = *blocknr; 213 ext2fs_unmark_block_bitmap(fs->block_map,block); 214 group = ext2fs_group_of_blk(fs, block); 215 fs->group_desc[group].bg_free_blocks_count++; 216 fs->super->s_free_blocks_count++; 217 return 0; 218} 219 220/* 221 * Remove the journal inode from the filesystem 222 */ 223static void remove_journal_inode(ext2_filsys fs) 224{ 225 struct ext2_inode inode; 226 errcode_t retval; 227 ino_t ino = fs->super->s_journal_inum; 228 229 retval = ext2fs_read_inode(fs, ino, &inode); 230 if (retval) { 231 com_err(program_name, retval, 232 _("while reading journal inode")); 233 exit(1); 234 } 235 if (ino == EXT2_JOURNAL_INO) { 236 retval = ext2fs_read_bitmaps(fs); 237 if (retval) { 238 com_err(program_name, retval, 239 _("while reading bitmaps")); 240 exit(1); 241 } 242 retval = ext2fs_block_iterate(fs, ino, 0, NULL, 243 release_blocks_proc, NULL); 244 if (retval) { 245 com_err(program_name, retval, 246 _("while clearing journal inode")); 247 exit(1); 248 } 249 memset(&inode, 0, sizeof(inode)); 250 ext2fs_mark_bb_dirty(fs); 251 fs->flags &= ~EXT2_FLAG_SUPER_ONLY; 252 } else 253 inode.i_flags &= ~EXT2_IMMUTABLE_FL; 254 retval = ext2fs_write_inode(fs, ino, &inode); 255 if (retval) { 256 com_err(program_name, retval, 257 _("while writing journal inode")); 258 exit(1); 259 } 260 fs->super->s_journal_inum = 0; 261 ext2fs_mark_super_dirty(fs); 262} 263 264/* 265 * Update the default mount options 266 */ 267static void update_mntopts(ext2_filsys fs, char *mntopts) 268{ 269 struct ext2_super_block *sb= fs->super; 270 271 if (e2p_edit_mntopts(mntopts, &sb->s_default_mount_opts, ~0)) { 272 fprintf(stderr, _("Invalid mount option set: %s\n"), 273 mntopts); 274 exit(1); 275 } 276 ext2fs_mark_super_dirty(fs); 277} 278 279/* 280 * Update the feature set as provided by the user. 281 */ 282static void update_feature_set(ext2_filsys fs, char *features) 283{ 284 int sparse, old_sparse, filetype, old_filetype; 285 int journal, old_journal, dxdir, old_dxdir; 286 struct ext2_super_block *sb= fs->super; 287 __u32 old_compat, old_incompat, old_ro_compat; 288 289 old_compat = sb->s_feature_compat; 290 old_ro_compat = sb->s_feature_ro_compat; 291 old_incompat = sb->s_feature_incompat; 292 293 old_sparse = sb->s_feature_ro_compat & 294 EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER; 295 old_filetype = sb->s_feature_incompat & 296 EXT2_FEATURE_INCOMPAT_FILETYPE; 297 old_journal = sb->s_feature_compat & 298 EXT3_FEATURE_COMPAT_HAS_JOURNAL; 299 old_dxdir = sb->s_feature_compat & 300 EXT2_FEATURE_COMPAT_DIR_INDEX; 301 if (e2p_edit_feature(features, &sb->s_feature_compat, 302 ok_features)) { 303 fprintf(stderr, _("Invalid filesystem option set: %s\n"), 304 features); 305 exit(1); 306 } 307 sparse = sb->s_feature_ro_compat & 308 EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER; 309 filetype = sb->s_feature_incompat & 310 EXT2_FEATURE_INCOMPAT_FILETYPE; 311 journal = sb->s_feature_compat & 312 EXT3_FEATURE_COMPAT_HAS_JOURNAL; 313 dxdir = sb->s_feature_compat & 314 EXT2_FEATURE_COMPAT_DIR_INDEX; 315 if (old_journal && !journal) { 316 if ((mount_flags & EXT2_MF_MOUNTED) && 317 !(mount_flags & EXT2_MF_READONLY)) { 318 fputs(_("The has_journal flag may only be " 319 "cleared when the filesystem is\n" 320 "unmounted or mounted " 321 "read-only.\n"), stderr); 322 exit(1); 323 } 324 if (sb->s_feature_incompat & 325 EXT3_FEATURE_INCOMPAT_RECOVER) { 326 fputs(_("The needs_recovery flag is set. " 327 "Please run e2fsck before clearing\n" 328 "the has_journal flag.\n"), stderr); 329 exit(1); 330 } 331 if (sb->s_journal_inum) { 332 remove_journal_inode(fs); 333 } 334 if (sb->s_journal_dev) { 335 remove_journal_device(fs); 336 } 337 } 338 if (journal && !old_journal) { 339 /* 340 * If adding a journal flag, let the create journal 341 * code below handle creating setting the flag and 342 * creating the journal. We supply a default size if 343 * necessary. 344 */ 345 if (!journal_size) 346 journal_size = -1; 347 sb->s_feature_compat &= ~EXT3_FEATURE_COMPAT_HAS_JOURNAL; 348 } 349 if (dxdir && !old_dxdir) { 350 if (!sb->s_def_hash_version) 351 sb->s_def_hash_version = EXT2_HASH_TEA; 352 if (uuid_is_null((unsigned char *) sb->s_hash_seed)) 353 uuid_generate((unsigned char *) sb->s_hash_seed); 354 } 355 356 if (sb->s_rev_level == EXT2_GOOD_OLD_REV && 357 (sb->s_feature_compat || sb->s_feature_ro_compat || 358 sb->s_feature_incompat)) 359 ext2fs_update_dynamic_rev(fs); 360 if ((sparse != old_sparse) || 361 (filetype != old_filetype)) { 362 sb->s_state &= ~EXT2_VALID_FS; 363 printf("\n%s\n", _(please_fsck)); 364 } 365 if ((old_compat != sb->s_feature_compat) || 366 (old_ro_compat != sb->s_feature_ro_compat) || 367 (old_incompat != sb->s_feature_incompat)) 368 ext2fs_mark_super_dirty(fs); 369} 370 371/* 372 * Add a journal to the filesystem. 373 */ 374static void add_journal(ext2_filsys fs) 375{ 376 unsigned long journal_blocks; 377 errcode_t retval; 378 ext2_filsys jfs; 379 io_manager io_ptr; 380 381 if (fs->super->s_feature_compat & 382 EXT3_FEATURE_COMPAT_HAS_JOURNAL) { 383 fputs(_("The filesystem already has a journal.\n"), stderr); 384 goto err; 385 } 386 if (journal_device) { 387 check_plausibility(journal_device); 388 check_mount(journal_device, 0, _("journal")); 389#ifdef CONFIG_TESTIO_DEBUG 390 io_ptr = test_io_manager; 391 test_io_backing_manager = unix_io_manager; 392#else 393 io_ptr = unix_io_manager; 394#endif 395 retval = ext2fs_open(journal_device, EXT2_FLAG_RW| 396 EXT2_FLAG_JOURNAL_DEV_OK, 0, 397 fs->blocksize, io_ptr, &jfs); 398 if (retval) { 399 com_err(program_name, retval, 400 _("\n\twhile trying to open journal on %s\n"), 401 journal_device); 402 goto err; 403 } 404 printf(_("Creating journal on device %s: "), 405 journal_device); 406 fflush(stdout); 407 408 retval = ext2fs_add_journal_device(fs, jfs); 409 ext2fs_close(jfs); 410 if (retval) { 411 com_err (program_name, retval, 412 _("while adding filesystem to journal on %s"), 413 journal_device); 414 goto err; 415 } 416 fputs(_("done\n"), stdout); 417 } else if (journal_size) { 418 fputs(_("Creating journal inode: "), stdout); 419 fflush(stdout); 420 journal_blocks = figure_journal_size(journal_size, fs); 421 422 retval = ext2fs_add_journal_inode(fs, journal_blocks, 423 journal_flags); 424 if (retval) { 425 fprintf(stderr, "\n"); 426 com_err(program_name, retval, 427 _("\n\twhile trying to create journal file")); 428 exit(1); 429 } else 430 fputs(_("done\n"), stdout); 431 /* 432 * If the filesystem wasn't mounted, we need to force 433 * the block group descriptors out. 434 */ 435 if ((mount_flags & EXT2_MF_MOUNTED) == 0) 436 fs->flags &= ~EXT2_FLAG_SUPER_ONLY; 437 } 438 print_check_message(fs); 439 return; 440 441err: 442 if (journal_device) 443 free(journal_device); 444 exit(1); 445} 446 447 448static void parse_e2label_options(int argc, char ** argv) 449{ 450 if ((argc < 2) || (argc > 3)) { 451 fputs(_("Usage: e2label device [newlabel]\n"), stderr); 452 exit(1); 453 } 454 io_options = strchr(argv[1], '?'); 455 if (io_options) 456 *io_options++ = 0; 457 device_name = blkid_get_devname(NULL, argv[1], NULL); 458 if (!device_name) { 459 com_err("e2label", 0, _("Unable to resolve '%s'"), 460 argv[1]); 461 exit(1); 462 } 463 if (argc == 3) { 464 open_flag = EXT2_FLAG_RW | EXT2_FLAG_JOURNAL_DEV_OK; 465 L_flag = 1; 466 new_label = argv[2]; 467 } else 468 print_label++; 469} 470 471static time_t parse_time(char *str) 472{ 473 struct tm ts; 474 475 if (strcmp(str, "now") == 0) { 476 return (time(0)); 477 } 478 memset(&ts, 0, sizeof(ts)); 479#ifdef HAVE_STRPTIME 480 strptime(str, "%Y%m%d%H%M%S", &ts); 481#else 482 sscanf(str, "%4d%2d%2d%2d%2d%2d", &ts.tm_year, &ts.tm_mon, 483 &ts.tm_mday, &ts.tm_hour, &ts.tm_min, &ts.tm_sec); 484 ts.tm_year -= 1900; 485 ts.tm_mon -= 1; 486 if (ts.tm_year < 0 || ts.tm_mon < 0 || ts.tm_mon > 11 || 487 ts.tm_mday < 0 || ts.tm_mday > 31 || ts.tm_hour > 23 || 488 ts.tm_min > 59 || ts.tm_sec > 61) 489 ts.tm_mday = 0; 490#endif 491 if (ts.tm_mday == 0) { 492 com_err(program_name, 0, 493 _("Couldn't parse date/time specifier: %s"), 494 str); 495 usage(); 496 } 497 return (mktime(&ts)); 498} 499 500static void parse_tune2fs_options(int argc, char **argv) 501{ 502 int c; 503 char * tmp; 504 struct group * gr; 505 struct passwd * pw; 506 507 printf("tune2fs %s (%s)\n", E2FSPROGS_VERSION, E2FSPROGS_DATE); 508 while ((c = getopt(argc, argv, "c:e:fg:i:jlm:o:r:s:u:C:J:L:M:O:T:U:")) != EOF) 509 switch (c) 510 { 511 case 'c': 512 max_mount_count = strtol (optarg, &tmp, 0); 513 if (*tmp || max_mount_count > 16000) { 514 com_err (program_name, 0, 515 _("bad mounts count - %s"), 516 optarg); 517 usage(); 518 } 519 if (max_mount_count == 0) 520 max_mount_count = -1; 521 c_flag = 1; 522 open_flag = EXT2_FLAG_RW; 523 break; 524 case 'C': 525 mount_count = strtoul (optarg, &tmp, 0); 526 if (*tmp || mount_count > 16000) { 527 com_err (program_name, 0, 528 _("bad mounts count - %s"), 529 optarg); 530 usage(); 531 } 532 C_flag = 1; 533 open_flag = EXT2_FLAG_RW; 534 break; 535 case 'e': 536 if (strcmp (optarg, "continue") == 0) 537 errors = EXT2_ERRORS_CONTINUE; 538 else if (strcmp (optarg, "remount-ro") == 0) 539 errors = EXT2_ERRORS_RO; 540 else if (strcmp (optarg, "panic") == 0) 541 errors = EXT2_ERRORS_PANIC; 542 else { 543 com_err (program_name, 0, 544 _("bad error behavior - %s"), 545 optarg); 546 usage(); 547 } 548 e_flag = 1; 549 open_flag = EXT2_FLAG_RW; 550 break; 551 case 'f': /* Force */ 552 f_flag = 1; 553 break; 554 case 'g': 555 resgid = strtoul (optarg, &tmp, 0); 556 if (*tmp) { 557 gr = getgrnam (optarg); 558 if (gr == NULL) 559 tmp = optarg; 560 else { 561 resgid = gr->gr_gid; 562 *tmp =0; 563 } 564 } 565 if (*tmp) { 566 com_err (program_name, 0, 567 _("bad gid/group name - %s"), 568 optarg); 569 usage(); 570 } 571 g_flag = 1; 572 open_flag = EXT2_FLAG_RW; 573 break; 574 case 'i': 575 interval = strtoul (optarg, &tmp, 0); 576 switch (*tmp) { 577 case 's': 578 tmp++; 579 break; 580 case '\0': 581 case 'd': 582 case 'D': /* days */ 583 interval *= 86400; 584 if (*tmp != '\0') 585 tmp++; 586 break; 587 case 'm': 588 case 'M': /* months! */ 589 interval *= 86400 * 30; 590 tmp++; 591 break; 592 case 'w': 593 case 'W': /* weeks */ 594 interval *= 86400 * 7; 595 tmp++; 596 break; 597 } 598 if (*tmp) { 599 com_err (program_name, 0, 600 _("bad interval - %s"), optarg); 601 usage(); 602 } 603 i_flag = 1; 604 open_flag = EXT2_FLAG_RW; 605 break; 606 case 'j': 607 if (!journal_size) 608 journal_size = -1; 609 open_flag = EXT2_FLAG_RW; 610 break; 611 case 'J': 612 parse_journal_opts(optarg); 613 open_flag = EXT2_FLAG_RW; 614 break; 615 case 'l': 616 l_flag = 1; 617 break; 618 case 'L': 619 new_label = optarg; 620 L_flag = 1; 621 open_flag = EXT2_FLAG_RW | 622 EXT2_FLAG_JOURNAL_DEV_OK; 623 break; 624 case 'm': 625 reserved_ratio = strtod(optarg, &tmp); 626 if (*tmp || reserved_ratio > 50) { 627 com_err (program_name, 0, 628 _("bad reserved block ratio - %s"), 629 optarg); 630 usage(); 631 } 632 m_flag = 1; 633 open_flag = EXT2_FLAG_RW; 634 break; 635 case 'M': 636 new_last_mounted = optarg; 637 M_flag = 1; 638 open_flag = EXT2_FLAG_RW; 639 break; 640 case 'o': 641 if (mntopts_cmd) { 642 com_err (program_name, 0, 643 _("-o may only be specified once")); 644 usage(); 645 } 646 mntopts_cmd = optarg; 647 open_flag = EXT2_FLAG_RW; 648 break; 649 650 case 'O': 651 if (features_cmd) { 652 com_err (program_name, 0, 653 _("-O may only be specified once")); 654 usage(); 655 } 656 features_cmd = optarg; 657 open_flag = EXT2_FLAG_RW; 658 break; 659 case 'r': 660 reserved_blocks = strtoul (optarg, &tmp, 0); 661 if (*tmp) { 662 com_err (program_name, 0, 663 _("bad reserved blocks count - %s"), 664 optarg); 665 usage(); 666 } 667 r_flag = 1; 668 open_flag = EXT2_FLAG_RW; 669 break; 670 case 's': 671 s_flag = atoi(optarg); 672 open_flag = EXT2_FLAG_RW; 673 break; 674 case 'T': 675 T_flag = 1; 676 last_check_time = parse_time(optarg); 677 open_flag = EXT2_FLAG_RW; 678 break; 679 case 'u': 680 resuid = strtoul (optarg, &tmp, 0); 681 if (*tmp) { 682 pw = getpwnam (optarg); 683 if (pw == NULL) 684 tmp = optarg; 685 else { 686 resuid = pw->pw_uid; 687 *tmp = 0; 688 } 689 } 690 if (*tmp) { 691 com_err (program_name, 0, 692 _("bad uid/user name - %s"), 693 optarg); 694 usage(); 695 } 696 u_flag = 1; 697 open_flag = EXT2_FLAG_RW; 698 break; 699 case 'U': 700 new_UUID = optarg; 701 U_flag = 1; 702 open_flag = EXT2_FLAG_RW | 703 EXT2_FLAG_JOURNAL_DEV_OK; 704 break; 705 default: 706 usage(); 707 } 708 if (optind < argc - 1 || optind == argc) 709 usage(); 710 if (!open_flag && !l_flag) 711 usage(); 712 io_options = strchr(argv[optind], '?'); 713 if (io_options) 714 *io_options++ = 0; 715 device_name = blkid_get_devname(NULL, argv[optind], NULL); 716 if (!device_name) { 717 com_err("tune2fs", 0, _("Unable to resolve '%s'"), 718 argv[optind]); 719 exit(1); 720 } 721} 722 723void do_findfs(int argc, char **argv) 724{ 725 char *dev; 726 727 if ((argc != 2) || 728 (strncmp(argv[1], "LABEL=", 6) && strncmp(argv[1], "UUID=", 5))) { 729 fprintf(stderr, "Usage: findfs LABEL=<label>|UUID=<uuid>\n"); 730 exit(2); 731 } 732 dev = blkid_get_devname(NULL, argv[1], NULL); 733 if (!dev) { 734 com_err("findfs", 0, _("Unable to resolve '%s'"), 735 argv[1]); 736 exit(1); 737 } 738 puts(dev); 739 exit(0); 740} 741 742 743int main (int argc, char ** argv) 744{ 745 errcode_t retval; 746 ext2_filsys fs; 747 struct ext2_super_block *sb; 748 io_manager io_ptr; 749 750#ifdef ENABLE_NLS 751 setlocale(LC_MESSAGES, ""); 752 setlocale(LC_CTYPE, ""); 753 bindtextdomain(NLS_CAT_NAME, LOCALEDIR); 754 textdomain(NLS_CAT_NAME); 755#endif 756 if (argc && *argv) 757 program_name = *argv; 758 initialize_ext2_error_table(); 759 760 if (strcmp(get_progname(argv[0]), "findfs") == 0) 761 do_findfs(argc, argv); 762 if (strcmp(get_progname(argv[0]), "e2label") == 0) 763 parse_e2label_options(argc, argv); 764 else 765 parse_tune2fs_options(argc, argv); 766 767#ifdef CONFIG_TESTIO_DEBUG 768 io_ptr = test_io_manager; 769 test_io_backing_manager = unix_io_manager; 770#else 771 io_ptr = unix_io_manager; 772#endif 773 retval = ext2fs_open2(device_name, io_options, open_flag, 774 0, 0, io_ptr, &fs); 775 if (retval) { 776 com_err (program_name, retval, _("while trying to open %s"), 777 device_name); 778 fprintf(stderr, 779 _("Couldn't find valid filesystem superblock.\n")); 780 exit(1); 781 } 782 sb = fs->super; 783 if (print_label) { 784 /* For e2label emulation */ 785 printf("%.*s\n", (int) sizeof(sb->s_volume_name), 786 sb->s_volume_name); 787 exit(0); 788 } 789 retval = ext2fs_check_if_mounted(device_name, &mount_flags); 790 if (retval) { 791 com_err("ext2fs_check_if_mount", retval, 792 _("while determining whether %s is mounted."), 793 device_name); 794 exit(1); 795 } 796 /* Normally we only need to write out the superblock */ 797 fs->flags |= EXT2_FLAG_SUPER_ONLY; 798 799 if (c_flag) { 800 sb->s_max_mnt_count = max_mount_count; 801 ext2fs_mark_super_dirty(fs); 802 printf (_("Setting maximal mount count to %d\n"), 803 max_mount_count); 804 } 805 if (C_flag) { 806 sb->s_mnt_count = mount_count; 807 ext2fs_mark_super_dirty(fs); 808 printf (_("Setting current mount count to %d\n"), mount_count); 809 } 810 if (e_flag) { 811 sb->s_errors = errors; 812 ext2fs_mark_super_dirty(fs); 813 printf (_("Setting error behavior to %d\n"), errors); 814 } 815 if (g_flag) { 816 sb->s_def_resgid = resgid; 817 ext2fs_mark_super_dirty(fs); 818 printf (_("Setting reserved blocks gid to %lu\n"), resgid); 819 } 820 if (i_flag) { 821 sb->s_checkinterval = interval; 822 ext2fs_mark_super_dirty(fs); 823 printf (_("Setting interval between checks to %lu seconds\n"), interval); 824 } 825 if (m_flag) { 826 sb->s_r_blocks_count = e2p_percent(reserved_ratio, 827 sb->s_blocks_count); 828 ext2fs_mark_super_dirty(fs); 829 printf (_("Setting reserved blocks percentage to %g%% (%u blocks)\n"), 830 reserved_ratio, sb->s_r_blocks_count); 831 } 832 if (r_flag) { 833 if (reserved_blocks >= sb->s_blocks_count/2) { 834 com_err (program_name, 0, 835 _("reserved blocks count is too big (%lu)"), 836 reserved_blocks); 837 exit (1); 838 } 839 sb->s_r_blocks_count = reserved_blocks; 840 ext2fs_mark_super_dirty(fs); 841 printf (_("Setting reserved blocks count to %lu\n"), 842 reserved_blocks); 843 } 844 if (s_flag == 1) { 845 if (sb->s_feature_ro_compat & 846 EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER) 847 fputs(_("\nThe filesystem already has sparse " 848 "superblocks.\n"), stderr); 849 else { 850 sb->s_feature_ro_compat |= 851 EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER; 852 sb->s_state &= ~EXT2_VALID_FS; 853 ext2fs_mark_super_dirty(fs); 854 printf(_("\nSparse superblock flag set. %s"), 855 _(please_fsck)); 856 } 857 } 858 if (s_flag == 0) { 859 if (!(sb->s_feature_ro_compat & 860 EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER)) 861 fputs(_("\nThe filesystem already has sparse " 862 "superblocks disabled.\n"), stderr); 863 else { 864 sb->s_feature_ro_compat &= 865 ~EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER; 866 sb->s_state &= ~EXT2_VALID_FS; 867 fs->flags |= EXT2_FLAG_MASTER_SB_ONLY; 868 ext2fs_mark_super_dirty(fs); 869 printf(_("\nSparse superblock flag cleared. %s"), 870 _(please_fsck)); 871 } 872 } 873 if (T_flag) { 874 sb->s_lastcheck = last_check_time; 875 ext2fs_mark_super_dirty(fs); 876 printf(_("Setting time filesystem last checked to %s\n"), 877 ctime(&last_check_time)); 878 } 879 if (u_flag) { 880 sb->s_def_resuid = resuid; 881 ext2fs_mark_super_dirty(fs); 882 printf (_("Setting reserved blocks uid to %lu\n"), resuid); 883 } 884 if (L_flag) { 885 if (strlen(new_label) > sizeof(sb->s_volume_name)) 886 fputs(_("Warning: label too long, truncating.\n"), 887 stderr); 888 memset(sb->s_volume_name, 0, sizeof(sb->s_volume_name)); 889 strncpy(sb->s_volume_name, new_label, 890 sizeof(sb->s_volume_name)); 891 ext2fs_mark_super_dirty(fs); 892 } 893 if (M_flag) { 894 memset(sb->s_last_mounted, 0, sizeof(sb->s_last_mounted)); 895 strncpy(sb->s_last_mounted, new_last_mounted, 896 sizeof(sb->s_last_mounted)); 897 ext2fs_mark_super_dirty(fs); 898 } 899 if (mntopts_cmd) 900 update_mntopts(fs, mntopts_cmd); 901 if (features_cmd) 902 update_feature_set(fs, features_cmd); 903 if (journal_size || journal_device) 904 add_journal(fs); 905 906 if (U_flag) { 907 if ((strcasecmp(new_UUID, "null") == 0) || 908 (strcasecmp(new_UUID, "clear") == 0)) { 909 uuid_clear(sb->s_uuid); 910 } else if (strcasecmp(new_UUID, "time") == 0) { 911 uuid_generate_time(sb->s_uuid); 912 } else if (strcasecmp(new_UUID, "random") == 0) { 913 uuid_generate(sb->s_uuid); 914 } else if (uuid_parse(new_UUID, sb->s_uuid)) { 915 com_err(program_name, 0, _("Invalid UUID format\n")); 916 exit(1); 917 } 918 ext2fs_mark_super_dirty(fs); 919 } 920 921 if (l_flag) 922 list_super (sb); 923 return (ext2fs_close (fs) ? 1 : 0); 924} 925