misc/tune2fs.c

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