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 "get_device_by_label.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;
  61 static int print_label;
  62 static int max_mount_count, mount_count, mount_flags;
  63 static unsigned long interval, reserved_ratio, reserved_blocks;
  64 static unsigned long resgid, resuid;
  65 static unsigned short errors;
  66 static int open_flag;
  67 static char *features_cmd;
  68
  69 int journal_size, journal_flags;
  70 char *journal_device;
  71
  72 static const char *please_fsck = N_("Please run e2fsck on the filesystem.\n");
  73
  74 static void usage(void)
  75 {
  76         fprintf(stderr,
  77                 _("Usage: %s [-c max-mounts-count] [-e errors-behavior] "
  78                   "[-g group]\n"
  79                  "\t[-i interval[d|m|w]] [-j] [-J journal-options]\n"
  80                  "\t[-l] [-s sparse-flag] [-m reserved-blocks-percent]\n"
  81                   "\t[-r reserved-blocks-count] [-u user] [-C mount-count]\n"
  82                   "\t[-L volume-label] [-M last-mounted-dir] [-U UUID]\n"
  83                   "\t[-O [^]feature[,...]] device\n"), program_name);
  84         exit (1);
  85 }
  86
  87 static __u32 ok_features[3] = {
  88         EXT3_FEATURE_COMPAT_HAS_JOURNAL,        /* Compat */
  89         EXT2_FEATURE_INCOMPAT_FILETYPE,         /* Incompat */
  90         EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER     /* R/O compat */
  91 };
  92
  93 /*
  94  * Remove an external journal from the filesystem
  95  */
  96 static void remove_journal_device(ext2_filsys fs)
  97 {
  98         char            *journal_device;
  99         ext2_filsys     jfs;
 100         char            buf[1024];
 101         journal_superblock_t    *jsb;
 102         int             i, nr_users;
 103         errcode_t       retval;
 104         int             commit_remove_journal = 0;
 105
 106         if (f_flag)
 107                 commit_remove_journal = 1; /* force removal even if error */
 108
 109         uuid_unparse(fs->super->s_journal_uuid, buf);
 110         journal_device = get_spec_by_uuid(buf);
 111
 112         if (!journal_device) {
 113                 journal_device =
 114                         ext2fs_find_block_device(fs->super->s_journal_dev);
 115                 if (!journal_device)
 116                         return;
 117         }
 118
 119         retval = ext2fs_open(journal_device, EXT2_FLAG_RW|
 120                              EXT2_FLAG_JOURNAL_DEV_OK, 0,
 121                              fs->blocksize, unix_io_manager, &jfs);
 122         if (retval) {
 123                 com_err(program_name, retval,
 124                         _("while trying to open external journal"));
 125                 goto no_valid_journal;
 126         }
 127         if (!(jfs->super->s_feature_incompat & EXT3_FEATURE_INCOMPAT_JOURNAL_DEV)) {
 128                 fprintf(stderr, _("%s is not a journal device.\n"),
 129                         journal_device);
 130                 goto no_valid_journal;
 131         }
 132
 133         /* Get the journal superblock */
 134         if ((retval = io_channel_read_blk(jfs->io, 1, -1024, buf))) {
 135                 com_err(program_name, retval,
 136                         _("while reading journal superblock"));
 137                 goto no_valid_journal;
 138         }
 139
 140         jsb = (journal_superblock_t *) buf;
 141         if ((jsb->s_header.h_magic != (unsigned) ntohl(JFS_MAGIC_NUMBER)) ||
 142             (jsb->s_header.h_blocktype != (unsigned) ntohl(JFS_SUPERBLOCK_V2))) {
 143                 fprintf(stderr, _("Journal superblock not found!\n"));
 144                 goto no_valid_journal;
 145         }
 146
 147         /* Find the filesystem UUID */
 148         nr_users = ntohl(jsb->s_nr_users);
 149         for (i=0; i < nr_users; i++) {
 150                 if (memcmp(fs->super->s_uuid,
 151                            &jsb->s_users[i*16], 16) == 0)
 152                         break;
 153         }
 154         if (i >= nr_users) {
 155                 fprintf(stderr,
 156                         _("Filesystem's UUID not found on journal device.\n"));
 157                 commit_remove_journal = 1;
 158                 goto no_valid_journal;
 159         }
 160         nr_users--;
 161         for (i=0; i < nr_users; i++)
 162                 memcpy(&jsb->s_users[i*16], &jsb->s_users[(i+1)*16], 16);
 163         jsb->s_nr_users = htonl(nr_users);
 164
 165         /* Write back the journal superblock */
 166         if ((retval = io_channel_write_blk(jfs->io, 1, -1024, buf))) {
 167                 com_err(program_name, retval,
 168                         "while writing journal superblock.");
 169                 goto no_valid_journal;
 170         }
 171
 172         commit_remove_journal = 1;
 173
 174 no_valid_journal:
 175         if (commit_remove_journal == 0) {
 176                 fprintf(stderr, _("Journal NOT removed\n"));
 177                 exit(1);
 178         }
 179         fs->super->s_journal_dev = 0;
 180         memset(fs->super->s_journal_uuid, 0,
 181                sizeof(fs->super->s_journal_uuid));
 182         ext2fs_mark_super_dirty(fs);
 183         printf(_("Journal removed\n"));
 184         free(journal_device);
 185 }
 186
 187 /* Helper function for remove_journal_inode */
 188 static int release_blocks_proc(ext2_filsys fs, blk_t *blocknr,
 189                                int blockcnt, void *private)
 190 {
 191         blk_t   block;
 192         int     group;
 193
 194         block = *blocknr;
 195         ext2fs_unmark_block_bitmap(fs->block_map,block);
 196         group = ext2fs_group_of_blk(fs, block);
 197         fs->group_desc[group].bg_free_blocks_count++;
 198         fs->super->s_free_blocks_count++;
 199         return 0;
 200 }
 201
 202 /*
 203  * Remove the journal inode from the filesystem
 204  */
 205 static void remove_journal_inode(ext2_filsys fs)
 206 {
 207         struct ext2_inode       inode;
 208         errcode_t               retval;
 209         ino_t                   ino = fs->super->s_journal_inum;
 210         int                     group;
 211
 212         retval = ext2fs_read_inode(fs, ino,  &inode);
 213         if (retval) {
 214                 com_err(program_name, retval,
 215                         _("while reading journal inode"));
 216                 exit(1);
 217         }
 218         if (ino == EXT2_JOURNAL_INO) {
 219                 retval = ext2fs_read_bitmaps(fs);
 220                 if (retval) {
 221                         com_err(program_name, retval,
 222                                 _("while reading bitmaps"));
 223                         exit(1);
 224                 }
 225                 retval = ext2fs_block_iterate(fs, ino, 0, NULL,
 226                                               release_blocks_proc, NULL);
 227                 if (retval) {
 228                         com_err(program_name, retval,
 229                                 _("while clearing journal inode"));
 230                         exit(1);
 231                 }
 232                 memset(&inode, 0, sizeof(inode));
 233                 ext2fs_mark_bb_dirty(fs);
 234                 group = ext2fs_group_of_ino(fs, ino);
 235                 fs->flags &= ~EXT2_FLAG_SUPER_ONLY;
 236         } else
 237                 inode.i_flags &= ~EXT2_IMMUTABLE_FL;
 238         retval = ext2fs_write_inode(fs, ino, &inode);
 239         if (retval) {
 240                 com_err(program_name, retval,
 241                         _("while writing journal inode"));
 242                 exit(1);
 243         }
 244         fs->super->s_journal_inum = 0;
 245         ext2fs_mark_super_dirty(fs);
 246 }
 247
 248 /*
 249  * Update the feature set as provided by the user.
 250  */
 251 static void update_feature_set(ext2_filsys fs, char *features)
 252 {
 253         int sparse, old_sparse, filetype, old_filetype;
 254         int journal, old_journal;
 255         struct ext2_inode       inode;
 256         struct ext2_super_block *sb= fs->super;
 257         errcode_t               retval;
 258
 259         old_sparse = sb->s_feature_ro_compat &
 260                 EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER;
 261         old_filetype = sb->s_feature_incompat &
 262                 EXT2_FEATURE_INCOMPAT_FILETYPE;
 263         old_journal = sb->s_feature_compat &
 264                 EXT3_FEATURE_COMPAT_HAS_JOURNAL;
 265         if (e2p_edit_feature(features, &sb->s_feature_compat,
 266                              ok_features)) {
 267                 fprintf(stderr, _("Invalid filesystem option set: %s\n"),
 268                         features);
 269                 exit(1);
 270         }
 271         sparse = sb->s_feature_ro_compat &
 272                 EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER;
 273         filetype = sb->s_feature_incompat &
 274                 EXT2_FEATURE_INCOMPAT_FILETYPE;
 275         journal = sb->s_feature_compat &
 276                 EXT3_FEATURE_COMPAT_HAS_JOURNAL;
 277         if (old_journal && !journal) {
 278                 if ((mount_flags & EXT2_MF_MOUNTED) &&
 279                     !(mount_flags & EXT2_MF_READONLY)) {
 280                         fprintf(stderr,
 281                                 _("The has_journal flag may only be "
 282                                   "cleared when the filesystem is\n"
 283                                   "unmounted or mounted "
 284                                   "read-only.\n"));
 285                         exit(1);
 286                 }
 287                 if (sb->s_feature_incompat &
 288                     EXT3_FEATURE_INCOMPAT_RECOVER) {
 289                         fprintf(stderr,
 290                                 _("The needs_recovery flag is set.  "
 291                                   "Please run e2fsck before clearing\n"
 292                                   "the has_journal flag.\n"));
 293                         exit(1);
 294                 }
 295                 if (sb->s_journal_inum) {
 296                         remove_journal_inode(fs);
 297                 }
 298                 if (sb->s_journal_dev) {
 299                         remove_journal_device(fs);
 300                 }
 301         }
 302         if (journal && !old_journal) {
 303                 /*
 304                  * If adding a journal flag, let the create journal
 305                  * code below handle creating setting the flag and
 306                  * creating the journal.  We supply a default size if
 307                  * necessary.
 308                  */
 309                 if (!journal_size)
 310                         journal_size = -1;
 311                 sb->s_feature_compat &= ~EXT3_FEATURE_COMPAT_HAS_JOURNAL;
 312         }
 313
 314         if (sb->s_rev_level == EXT2_GOOD_OLD_REV &&
 315             (sb->s_feature_compat || sb->s_feature_ro_compat ||
 316              sb->s_feature_incompat))
 317                 ext2fs_update_dynamic_rev(fs);
 318         if ((sparse != old_sparse) ||
 319             (filetype != old_filetype)) {
 320                 sb->s_state &= ~EXT2_VALID_FS;
 321                 printf("\n%s\n", _(please_fsck));
 322         }
 323         ext2fs_mark_super_dirty(fs);
 324 }
 325
 326 /*
 327  * Add a journal to the filesystem.
 328  */
 329 static void add_journal(ext2_filsys fs)
 330 {
 331         unsigned long journal_blocks;
 332         errcode_t       retval;
 333         ext2_filsys     jfs;
 334
 335         if (fs->super->s_feature_compat &
 336             EXT3_FEATURE_COMPAT_HAS_JOURNAL) {
 337                 fprintf(stderr, _("The filesystem already has a journal.\n"));
 338                 goto err;
 339         }
 340         if (journal_device) {
 341                 check_plausibility(journal_device);
 342                 check_mount(journal_device, 0, _("journal"));
 343                 retval = ext2fs_open(journal_device, EXT2_FLAG_RW|
 344                                      EXT2_FLAG_JOURNAL_DEV_OK, 0,
 345                                      fs->blocksize, unix_io_manager, &jfs);
 346                 if (retval) {
 347                         com_err(program_name, retval,
 348                                 _("\n\twhile trying to open journal on %s\n"),
 349                                 journal_device);
 350                         goto err;
 351                 }
 352                 printf(_("Creating journal on device %s: "),
 353                        journal_device);
 354                 fflush(stdout);
 355
 356                 retval = ext2fs_add_journal_device(fs, jfs);
 357                 ext2fs_close(jfs);
 358                 if (retval) {
 359                         com_err (program_name, retval,
 360                                  _("while adding filesystem to journal on %s"),
 361                                  journal_device);
 362                         goto err;
 363                 }
 364                 printf(_("done\n"));
 365         } else if (journal_size) {
 366                 printf(_("Creating journal inode: "));
 367                 fflush(stdout);
 368                 journal_blocks = figure_journal_size(journal_size, fs);
 369
 370                 retval = ext2fs_add_journal_inode(fs, journal_blocks,
 371                                                   journal_flags);
 372                 if (retval) {
 373                         fprintf(stderr, "\n");
 374                         com_err(program_name, retval,
 375                                 _("\n\twhile trying to create journal file"));
 376                         exit(1);
 377                 } else
 378                         printf(_("done\n"));
 379                 /*
 380                  * If the filesystem wasn't mounted, we need to force
 381                  * the block group descriptors out.
 382                  */
 383                 if ((mount_flags & EXT2_MF_MOUNTED) == 0)
 384                         fs->flags &= ~EXT2_FLAG_SUPER_ONLY;
 385         }
 386         print_check_message(fs);
 387         return;
 388
 389 err:
 390         if (journal_device)
 391                 free(journal_device);
 392         exit(1);
 393 }
 394
 395 /*
 396  * Given argv[0], return the program name.
 397  */
 398 static char *get_progname(char *argv_zero)
 399 {
 400         char    *cp;
 401
 402         cp = strrchr(argv_zero, '/');
 403         if (!cp )
 404                 return argv_zero;
 405         else
 406                 return cp+1;
 407 }
 408
 409
 410 static void parse_e2label_options(int argc, char ** argv)
 411 {
 412         if ((argc < 2) || (argc > 3)) {
 413                 fprintf(stderr, _("Usage: e2label device [newlabel]\n"));
 414                 exit(1);
 415         }
 416         device_name = argv[1];
 417         if (argc == 3) {
 418                 open_flag = EXT2_FLAG_RW | EXT2_FLAG_JOURNAL_DEV_OK;
 419                 L_flag = 1;
 420                 new_label = argv[2];
 421         } else
 422                 print_label++;
 423 }
 424
 425
 426 static void parse_tune2fs_options(int argc, char **argv)
 427 {
 428         int c;
 429         char * tmp;
 430         struct group * gr;
 431         struct passwd * pw;
 432
 433         printf("tune2fs %s (%s)\n", E2FSPROGS_VERSION, E2FSPROGS_DATE);
 434         while ((c = getopt (argc, argv, "c:e:fg:i:jlm:r:s:u:C:J:L:M:O:U:")) != EOF)
 435                 switch (c)
 436                 {
 437                         case 'c':
 438                                 max_mount_count = strtol (optarg, &tmp, 0);
 439                                 if (*tmp || max_mount_count > 16000) {
 440                                         com_err (program_name, 0,
 441                                                  _("bad mounts count - %s"),
 442                                                  optarg);
 443                                         usage();
 444                                 }
 445                                 if (max_mount_count == 0)
 446                                         max_mount_count = -1;
 447                                 c_flag = 1;
 448                                 open_flag = EXT2_FLAG_RW;
 449                                 break;
 450                         case 'C':
 451                                 mount_count = strtoul (optarg, &tmp, 0);
 452                                 if (*tmp || mount_count > 16000) {
 453                                         com_err (program_name, 0,
 454                                                  _("bad mounts count - %s"),
 455                                                  optarg);
 456                                         usage();
 457                                 }
 458                                 C_flag = 1;
 459                                 open_flag = EXT2_FLAG_RW;
 460                                 break;
 461                         case 'e':
 462                                 if (strcmp (optarg, "continue") == 0)
 463                                         errors = EXT2_ERRORS_CONTINUE;
 464                                 else if (strcmp (optarg, "remount-ro") == 0)
 465                                         errors = EXT2_ERRORS_RO;
 466                                 else if (strcmp (optarg, "panic") == 0)
 467                                         errors = EXT2_ERRORS_PANIC;
 468                                 else {
 469                                         com_err (program_name, 0,
 470                                                  _("bad error behavior - %s"),
 471                                                  optarg);
 472                                         usage();
 473                                 }
 474                                 e_flag = 1;
 475                                 open_flag = EXT2_FLAG_RW;
 476                                 break;
 477                         case 'f': /* Force */
 478                                 f_flag = 1;
 479                                 break;
 480                         case 'g':
 481                                 resgid = strtoul (optarg, &tmp, 0);
 482                                 if (*tmp) {
 483                                         gr = getgrnam (optarg);
 484                                         if (gr == NULL)
 485                                                 tmp = optarg;
 486                                         else {
 487                                                 resgid = gr->gr_gid;
 488                                                 *tmp =0;
 489                                         }
 490                                 }
 491                                 if (*tmp) {
 492                                         com_err (program_name, 0,
 493                                                  _("bad gid/group name - %s"),
 494                                                  optarg);
 495                                         usage();
 496                                 }
 497                                 g_flag = 1;
 498                                 open_flag = EXT2_FLAG_RW;
 499                                 break;
 500                         case 'i':
 501                                 interval = strtoul (optarg, &tmp, 0);
 502                                 switch (*tmp) {
 503                                 case 's':
 504                                         tmp++;
 505                                         break;
 506                                 case '\0':
 507                                 case 'd':
 508                                 case 'D': /* days */
 509                                         interval *= 86400;
 510                                         if (*tmp != '\0')
 511                                                 tmp++;
 512                                         break;
 513                                 case 'm':
 514                                 case 'M': /* months! */
 515                                         interval *= 86400 * 30;
 516                                         tmp++;
 517                                         break;
 518                                 case 'w':
 519                                 case 'W': /* weeks */
 520                                         interval *= 86400 * 7;
 521                                         tmp++;
 522                                         break;
 523                                 }
 524                                 if (*tmp || interval > (365 * 86400)) {
 525                                         com_err (program_name, 0,
 526                                                 _("bad interval - %s"), optarg);
 527                                         usage();
 528                                 }
 529                                 i_flag = 1;
 530                                 open_flag = EXT2_FLAG_RW;
 531                                 break;
 532                         case 'j':
 533                                 if (!journal_size)
 534                                         journal_size = -1;
 535                                 open_flag = EXT2_FLAG_RW;
 536                                 break;
 537                         case 'J':
 538                                 parse_journal_opts(optarg);
 539                                 open_flag = EXT2_FLAG_RW;
 540                                 break;
 541                         case 'l':
 542                                 l_flag = 1;
 543                                 break;
 544                         case 'L':
 545                                 new_label = optarg;
 546                                 L_flag = 1;
 547                                 open_flag = EXT2_FLAG_RW |
 548                                         EXT2_FLAG_JOURNAL_DEV_OK;
 549                                 break;
 550                         case 'm':
 551                                 reserved_ratio = strtoul (optarg, &tmp, 0);
 552                                 if (*tmp || reserved_ratio > 50) {
 553                                         com_err (program_name, 0,
 554                                                  _("bad reserved block ratio - %s"),
 555                                                  optarg);
 556                                         usage();
 557                                 }
 558                                 m_flag = 1;
 559                                 open_flag = EXT2_FLAG_RW;
 560                                 break;
 561                         case 'M':
 562                                 new_last_mounted = optarg;
 563                                 M_flag = 1;
 564                                 open_flag = EXT2_FLAG_RW;
 565                                 break;
 566                         case 'O':
 567                                 if (features_cmd) {
 568                                         com_err (program_name, 0,
 569                                          _("-O may only be specified once"));
 570                                         usage();
 571                                 }
 572                                 features_cmd = optarg;
 573                                 open_flag = EXT2_FLAG_RW;
 574                                 break;
 575                         case 'r':
 576                                 reserved_blocks = strtoul (optarg, &tmp, 0);
 577                                 if (*tmp) {
 578                                         com_err (program_name, 0,
 579                                                  _("bad reserved blocks count - %s"),
 580                                                  optarg);
 581                                         usage();
 582                                 }
 583                                 r_flag = 1;
 584                                 open_flag = EXT2_FLAG_RW;
 585                                 break;
 586                         case 's':
 587                                 s_flag = atoi(optarg);
 588                                 open_flag = EXT2_FLAG_RW;
 589                                 break;
 590                         case 'u':
 591                                 resuid = strtoul (optarg, &tmp, 0);
 592                                 if (*tmp) {
 593                                         pw = getpwnam (optarg);
 594                                         if (pw == NULL)
 595                                                 tmp = optarg;
 596                                         else {
 597                                                 resuid = pw->pw_uid;
 598                                                 *tmp = 0;
 599                                         }
 600                                 }
 601                                 if (*tmp) {
 602                                         com_err (program_name, 0,
 603                                                  _("bad uid/user name - %s"),
 604                                                  optarg);
 605                                         usage();
 606                                 }
 607                                 u_flag = 1;
 608                                 open_flag = EXT2_FLAG_RW;
 609                                 break;
 610                         case 'U':
 611                                 new_UUID = optarg;
 612                                 U_flag = 1;
 613                                 open_flag = EXT2_FLAG_RW |
 614                                         EXT2_FLAG_JOURNAL_DEV_OK;
 615                                 break;
 616                         default:
 617                                 usage();
 618                 }
 619         if (optind < argc - 1 || optind == argc)
 620                 usage();
 621         if (!open_flag && !l_flag)
 622                 usage();
 623         device_name = argv[optind];
 624 }
 625
 626
 627
 628 int main (int argc, char ** argv)
 629 {
 630         errcode_t retval;
 631         ext2_filsys fs;
 632         struct ext2_super_block *sb;
 633
 634 #ifdef ENABLE_NLS
 635         setlocale(LC_MESSAGES, "");
 636         bindtextdomain(NLS_CAT_NAME, LOCALEDIR);
 637         textdomain(NLS_CAT_NAME);
 638 #endif
 639         if (argc && *argv)
 640                 program_name = *argv;
 641         initialize_ext2_error_table();
 642
 643         if (strcmp(get_progname(argv[0]), "e2label") == 0)
 644                 parse_e2label_options(argc, argv);
 645         else
 646                 parse_tune2fs_options(argc, argv);
 647
 648         retval = ext2fs_open (device_name, open_flag, 0, 0,
 649                               unix_io_manager, &fs);
 650         if (retval) {
 651                 com_err (program_name, retval, _("while trying to open %s"),
 652                          device_name);
 653                 fprintf(stderr,
 654                         _("Couldn't find valid filesystem superblock.\n"));
 655                 exit(1);
 656         }
 657         sb = fs->super;
 658         if (print_label) {
 659                 /* For e2label emulation */
 660                 printf("%.*s\n", (int) sizeof(sb->s_volume_name),
 661                        sb->s_volume_name);
 662                 exit(0);
 663         }
 664         retval = ext2fs_check_if_mounted(device_name, &mount_flags);
 665         if (retval) {
 666                 com_err("ext2fs_check_if_mount", retval,
 667                         _("while determining whether %s is mounted."),
 668                         device_name);
 669                 exit(1);
 670         }
 671         /* Normally we only need to write out the superblock */
 672         fs->flags |= EXT2_FLAG_SUPER_ONLY;
 673
 674         if (c_flag) {
 675                 sb->s_max_mnt_count = max_mount_count;
 676                 ext2fs_mark_super_dirty(fs);
 677                 printf (_("Setting maximal mount count to %d\n"),
 678                         max_mount_count);
 679         }
 680         if (C_flag) {
 681                 sb->s_mnt_count = mount_count;
 682                 ext2fs_mark_super_dirty(fs);
 683                 printf (_("Setting current mount count to %d\n"), mount_count);
 684         }
 685         if (e_flag) {
 686                 sb->s_errors = errors;
 687                 ext2fs_mark_super_dirty(fs);
 688                 printf (_("Setting error behavior to %d\n"), errors);
 689         }
 690         if (g_flag) {
 691                 sb->s_def_resgid = resgid;
 692                 ext2fs_mark_super_dirty(fs);
 693                 printf (_("Setting reserved blocks gid to %lu\n"), resgid);
 694         }
 695         if (i_flag) {
 696                 sb->s_checkinterval = interval;
 697                 ext2fs_mark_super_dirty(fs);
 698                 printf (_("Setting interval between check %lu seconds\n"), interval);
 699         }
 700         if (m_flag) {
 701                 sb->s_r_blocks_count = (sb->s_blocks_count / 100)
 702                         * reserved_ratio;
 703                 ext2fs_mark_super_dirty(fs);
 704                 printf (_("Setting reserved blocks percentage to %lu (%u blocks)\n"),
 705                         reserved_ratio, sb->s_r_blocks_count);
 706         }
 707         if (r_flag) {
 708                 if (reserved_blocks >= sb->s_blocks_count) {
 709                         com_err (program_name, 0,
 710                                  _("reserved blocks count is too big (%ul)"),
 711                                  reserved_blocks);
 712                         exit (1);
 713                 }
 714                 sb->s_r_blocks_count = reserved_blocks;
 715                 ext2fs_mark_super_dirty(fs);
 716                 printf (_("Setting reserved blocks count to %lu\n"),
 717                         reserved_blocks);
 718         }
 719         if (s_flag == 1) {
 720                 if (sb->s_feature_ro_compat &
 721                     EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER)
 722                         fprintf(stderr, _("\nThe filesystem already"
 723                                 " has sparse superblocks.\n"));
 724                 else {
 725                         sb->s_feature_ro_compat |=
 726                                 EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER;
 727                         sb->s_state &= ~EXT2_VALID_FS;
 728                         ext2fs_mark_super_dirty(fs);
 729                         printf(_("\nSparse superblock flag set.  %s"),
 730                                _(please_fsck));
 731                 }
 732         }
 733         if (s_flag == 0) {
 734                 if (!(sb->s_feature_ro_compat &
 735                       EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER))
 736                         fprintf(stderr, _("\nThe filesystem already"
 737                                 " has sparse superblocks disabled.\n"));
 738                 else {
 739                         sb->s_feature_ro_compat &=
 740                                 ~EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER;
 741                         sb->s_state &= ~EXT2_VALID_FS;
 742                         fs->flags |= EXT2_FLAG_MASTER_SB_ONLY;
 743                         ext2fs_mark_super_dirty(fs);
 744                         printf(_("\nSparse superblock flag cleared.  %s"),
 745                                _(please_fsck));
 746                 }
 747         }
 748         if (u_flag) {
 749                 sb->s_def_resuid = resuid;
 750                 ext2fs_mark_super_dirty(fs);
 751                 printf (_("Setting reserved blocks uid to %lu\n"), resuid);
 752         }
 753         if (L_flag) {
 754                 if (strlen(new_label) > sizeof(sb->s_volume_name))
 755                         fprintf(stderr, _("Warning: label too "
 756                                 "long, truncating.\n"));
 757                 memset(sb->s_volume_name, 0, sizeof(sb->s_volume_name));
 758                 strncpy(sb->s_volume_name, new_label,
 759                         sizeof(sb->s_volume_name));
 760                 ext2fs_mark_super_dirty(fs);
 761         }
 762         if (M_flag) {
 763                 memset(sb->s_last_mounted, 0, sizeof(sb->s_last_mounted));
 764                 strncpy(sb->s_last_mounted, new_last_mounted,
 765                         sizeof(sb->s_last_mounted));
 766                 ext2fs_mark_super_dirty(fs);
 767         }
 768         if (features_cmd)
 769                 update_feature_set(fs, features_cmd);
 770         if (journal_size || journal_device)
 771                 add_journal(fs);
 772
 773         if (U_flag) {
 774                 if ((strcasecmp(new_UUID, "null") == 0) ||
 775                     (strcasecmp(new_UUID, "clear") == 0)) {
 776                         uuid_clear(sb->s_uuid);
 777                 } else if (strcasecmp(new_UUID, "time") == 0) {
 778                         uuid_generate_time(sb->s_uuid);
 779                 } else if (strcasecmp(new_UUID, "random") == 0) {
 780                         uuid_generate(sb->s_uuid);
 781                 } else if (uuid_parse(new_UUID, sb->s_uuid)) {
 782                         com_err(program_name, 0, _("Invalid UUID format\n"));
 783                         exit(1);
 784                 }
 785                 ext2fs_mark_super_dirty(fs);
 786         }
 787
 788         if (l_flag)
 789                 list_super (sb);
 790         ext2fs_close (fs);
 791         exit (0);
 792 }