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