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_path;
  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_path = get_spec_by_uuid(buf);
 111
 112         if (!journal_path) {
 113                 journal_path =
 114                         ext2fs_find_block_device(fs->super->s_journal_dev);
 115                 if (!journal_path)
 116                         return;
 117         }
 118
 119         retval = ext2fs_open(journal_path, 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_path);
 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_path);
 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_super_block *sb= fs->super;
 254
 255         old_sparse = sb->s_feature_ro_compat &
 256                 EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER;
 257         old_filetype = sb->s_feature_incompat &
 258                 EXT2_FEATURE_INCOMPAT_FILETYPE;
 259         old_journal = sb->s_feature_compat &
 260                 EXT3_FEATURE_COMPAT_HAS_JOURNAL;
 261         if (e2p_edit_feature(features, &sb->s_feature_compat,
 262                              ok_features)) {
 263                 fprintf(stderr, _("Invalid filesystem option set: %s\n"),
 264                         features);
 265                 exit(1);
 266         }
 267         sparse = sb->s_feature_ro_compat &
 268                 EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER;
 269         filetype = sb->s_feature_incompat &
 270                 EXT2_FEATURE_INCOMPAT_FILETYPE;
 271         journal = sb->s_feature_compat &
 272                 EXT3_FEATURE_COMPAT_HAS_JOURNAL;
 273         if (old_journal && !journal) {
 274                 if ((mount_flags & EXT2_MF_MOUNTED) &&
 275                     !(mount_flags & EXT2_MF_READONLY)) {
 276                         fprintf(stderr,
 277                                 _("The has_journal flag may only be "
 278                                   "cleared when the filesystem is\n"
 279                                   "unmounted or mounted "
 280                                   "read-only.\n"));
 281                         exit(1);
 282                 }
 283                 if (sb->s_feature_incompat &
 284                     EXT3_FEATURE_INCOMPAT_RECOVER) {
 285                         fprintf(stderr,
 286                                 _("The needs_recovery flag is set.  "
 287                                   "Please run e2fsck before clearing\n"
 288                                   "the has_journal flag.\n"));
 289                         exit(1);
 290                 }
 291                 if (sb->s_journal_inum) {
 292                         remove_journal_inode(fs);
 293                 }
 294                 if (sb->s_journal_dev) {
 295                         remove_journal_device(fs);
 296                 }
 297         }
 298         if (journal && !old_journal) {
 299                 /*
 300                  * If adding a journal flag, let the create journal
 301                  * code below handle creating setting the flag and
 302                  * creating the journal.  We supply a default size if
 303                  * necessary.
 304                  */
 305                 if (!journal_size)
 306                         journal_size = -1;
 307                 sb->s_feature_compat &= ~EXT3_FEATURE_COMPAT_HAS_JOURNAL;
 308         }
 309
 310         if (sb->s_rev_level == EXT2_GOOD_OLD_REV &&
 311             (sb->s_feature_compat || sb->s_feature_ro_compat ||
 312              sb->s_feature_incompat))
 313                 ext2fs_update_dynamic_rev(fs);
 314         if ((sparse != old_sparse) ||
 315             (filetype != old_filetype)) {
 316                 sb->s_state &= ~EXT2_VALID_FS;
 317                 printf("\n%s\n", _(please_fsck));
 318         }
 319         ext2fs_mark_super_dirty(fs);
 320 }
 321
 322 /*
 323  * Add a journal to the filesystem.
 324  */
 325 static void add_journal(ext2_filsys fs)
 326 {
 327         unsigned long journal_blocks;
 328         errcode_t       retval;
 329         ext2_filsys     jfs;
 330
 331         if (fs->super->s_feature_compat &
 332             EXT3_FEATURE_COMPAT_HAS_JOURNAL) {
 333                 fprintf(stderr, _("The filesystem already has a journal.\n"));
 334                 goto err;
 335         }
 336         if (journal_device) {
 337                 check_plausibility(journal_device);
 338                 check_mount(journal_device, 0, _("journal"));
 339                 retval = ext2fs_open(journal_device, EXT2_FLAG_RW|
 340                                      EXT2_FLAG_JOURNAL_DEV_OK, 0,
 341                                      fs->blocksize, unix_io_manager, &jfs);
 342                 if (retval) {
 343                         com_err(program_name, retval,
 344                                 _("\n\twhile trying to open journal on %s\n"),
 345                                 journal_device);
 346                         goto err;
 347                 }
 348                 printf(_("Creating journal on device %s: "),
 349                        journal_device);
 350                 fflush(stdout);
 351
 352                 retval = ext2fs_add_journal_device(fs, jfs);
 353                 ext2fs_close(jfs);
 354                 if (retval) {
 355                         com_err (program_name, retval,
 356                                  _("while adding filesystem to journal on %s"),
 357                                  journal_device);
 358                         goto err;
 359                 }
 360                 printf(_("done\n"));
 361         } else if (journal_size) {
 362                 printf(_("Creating journal inode: "));
 363                 fflush(stdout);
 364                 journal_blocks = figure_journal_size(journal_size, fs);
 365
 366                 retval = ext2fs_add_journal_inode(fs, journal_blocks,
 367                                                   journal_flags);
 368                 if (retval) {
 369                         fprintf(stderr, "\n");
 370                         com_err(program_name, retval,
 371                                 _("\n\twhile trying to create journal file"));
 372                         exit(1);
 373                 } else
 374                         printf(_("done\n"));
 375                 /*
 376                  * If the filesystem wasn't mounted, we need to force
 377                  * the block group descriptors out.
 378                  */
 379                 if ((mount_flags & EXT2_MF_MOUNTED) == 0)
 380                         fs->flags &= ~EXT2_FLAG_SUPER_ONLY;
 381         }
 382         print_check_message(fs);
 383         return;
 384
 385 err:
 386         if (journal_device)
 387                 free(journal_device);
 388         exit(1);
 389 }
 390
 391 /*
 392  * Given argv[0], return the program name.
 393  */
 394 static char *get_progname(char *argv_zero)
 395 {
 396         char    *cp;
 397
 398         cp = strrchr(argv_zero, '/');
 399         if (!cp )
 400                 return argv_zero;
 401         else
 402                 return cp+1;
 403 }
 404
 405
 406 static void parse_e2label_options(int argc, char ** argv)
 407 {
 408         if ((argc < 2) || (argc > 3)) {
 409                 fprintf(stderr, _("Usage: e2label device [newlabel]\n"));
 410                 exit(1);
 411         }
 412         device_name = argv[1];
 413         if (argc == 3) {
 414                 open_flag = EXT2_FLAG_RW | EXT2_FLAG_JOURNAL_DEV_OK;
 415                 L_flag = 1;
 416                 new_label = argv[2];
 417         } else
 418                 print_label++;
 419 }
 420
 421
 422 static void parse_tune2fs_options(int argc, char **argv)
 423 {
 424         int c;
 425         char * tmp;
 426         struct group * gr;
 427         struct passwd * pw;
 428
 429         printf("tune2fs %s (%s)\n", E2FSPROGS_VERSION, E2FSPROGS_DATE);
 430         while ((c = getopt (argc, argv, "c:e:fg:i:jlm:r:s:u:C:J:L:M:O:U:")) != EOF)
 431                 switch (c)
 432                 {
 433                         case 'c':
 434                                 max_mount_count = strtol (optarg, &tmp, 0);
 435                                 if (*tmp || max_mount_count > 16000) {
 436                                         com_err (program_name, 0,
 437                                                  _("bad mounts count - %s"),
 438                                                  optarg);
 439                                         usage();
 440                                 }
 441                                 if (max_mount_count == 0)
 442                                         max_mount_count = -1;
 443                                 c_flag = 1;
 444                                 open_flag = EXT2_FLAG_RW;
 445                                 break;
 446                         case 'C':
 447                                 mount_count = strtoul (optarg, &tmp, 0);
 448                                 if (*tmp || mount_count > 16000) {
 449                                         com_err (program_name, 0,
 450                                                  _("bad mounts count - %s"),
 451                                                  optarg);
 452                                         usage();
 453                                 }
 454                                 C_flag = 1;
 455                                 open_flag = EXT2_FLAG_RW;
 456                                 break;
 457                         case 'e':
 458                                 if (strcmp (optarg, "continue") == 0)
 459                                         errors = EXT2_ERRORS_CONTINUE;
 460                                 else if (strcmp (optarg, "remount-ro") == 0)
 461                                         errors = EXT2_ERRORS_RO;
 462                                 else if (strcmp (optarg, "panic") == 0)
 463                                         errors = EXT2_ERRORS_PANIC;
 464                                 else {
 465                                         com_err (program_name, 0,
 466                                                  _("bad error behavior - %s"),
 467                                                  optarg);
 468                                         usage();
 469                                 }
 470                                 e_flag = 1;
 471                                 open_flag = EXT2_FLAG_RW;
 472                                 break;
 473                         case 'f': /* Force */
 474                                 f_flag = 1;
 475                                 break;
 476                         case 'g':
 477                                 resgid = strtoul (optarg, &tmp, 0);
 478                                 if (*tmp) {
 479                                         gr = getgrnam (optarg);
 480                                         if (gr == NULL)
 481                                                 tmp = optarg;
 482                                         else {
 483                                                 resgid = gr->gr_gid;
 484                                                 *tmp =0;
 485                                         }
 486                                 }
 487                                 if (*tmp) {
 488                                         com_err (program_name, 0,
 489                                                  _("bad gid/group name - %s"),
 490                                                  optarg);
 491                                         usage();
 492                                 }
 493                                 g_flag = 1;
 494                                 open_flag = EXT2_FLAG_RW;
 495                                 break;
 496                         case 'i':
 497                                 interval = strtoul (optarg, &tmp, 0);
 498                                 switch (*tmp) {
 499                                 case 's':
 500                                         tmp++;
 501                                         break;
 502                                 case '\0':
 503                                 case 'd':
 504                                 case 'D': /* days */
 505                                         interval *= 86400;
 506                                         if (*tmp != '\0')
 507                                                 tmp++;
 508                                         break;
 509                                 case 'm':
 510                                 case 'M': /* months! */
 511                                         interval *= 86400 * 30;
 512                                         tmp++;
 513                                         break;
 514                                 case 'w':
 515                                 case 'W': /* weeks */
 516                                         interval *= 86400 * 7;
 517                                         tmp++;
 518                                         break;
 519                                 }
 520                                 if (*tmp || interval > (365 * 86400)) {
 521                                         com_err (program_name, 0,
 522                                                 _("bad interval - %s"), optarg);
 523                                         usage();
 524                                 }
 525                                 i_flag = 1;
 526                                 open_flag = EXT2_FLAG_RW;
 527                                 break;
 528                         case 'j':
 529                                 if (!journal_size)
 530                                         journal_size = -1;
 531                                 open_flag = EXT2_FLAG_RW;
 532                                 break;
 533                         case 'J':
 534                                 parse_journal_opts(optarg);
 535                                 open_flag = EXT2_FLAG_RW;
 536                                 break;
 537                         case 'l':
 538                                 l_flag = 1;
 539                                 break;
 540                         case 'L':
 541                                 new_label = optarg;
 542                                 L_flag = 1;
 543                                 open_flag = EXT2_FLAG_RW |
 544                                         EXT2_FLAG_JOURNAL_DEV_OK;
 545                                 break;
 546                         case 'm':
 547                                 reserved_ratio = strtoul (optarg, &tmp, 0);
 548                                 if (*tmp || reserved_ratio > 50) {
 549                                         com_err (program_name, 0,
 550                                                  _("bad reserved block ratio - %s"),
 551                                                  optarg);
 552                                         usage();
 553                                 }
 554                                 m_flag = 1;
 555                                 open_flag = EXT2_FLAG_RW;
 556                                 break;
 557                         case 'M':
 558                                 new_last_mounted = optarg;
 559                                 M_flag = 1;
 560                                 open_flag = EXT2_FLAG_RW;
 561                                 break;
 562                         case 'O':
 563                                 if (features_cmd) {
 564                                         com_err (program_name, 0,
 565                                          _("-O may only be specified once"));
 566                                         usage();
 567                                 }
 568                                 features_cmd = optarg;
 569                                 open_flag = EXT2_FLAG_RW;
 570                                 break;
 571                         case 'r':
 572                                 reserved_blocks = strtoul (optarg, &tmp, 0);
 573                                 if (*tmp) {
 574                                         com_err (program_name, 0,
 575                                                  _("bad reserved blocks count - %s"),
 576                                                  optarg);
 577                                         usage();
 578                                 }
 579                                 r_flag = 1;
 580                                 open_flag = EXT2_FLAG_RW;
 581                                 break;
 582                         case 's':
 583                                 s_flag = atoi(optarg);
 584                                 open_flag = EXT2_FLAG_RW;
 585                                 break;
 586                         case 'u':
 587                                 resuid = strtoul (optarg, &tmp, 0);
 588                                 if (*tmp) {
 589                                         pw = getpwnam (optarg);
 590                                         if (pw == NULL)
 591                                                 tmp = optarg;
 592                                         else {
 593                                                 resuid = pw->pw_uid;
 594                                                 *tmp = 0;
 595                                         }
 596                                 }
 597                                 if (*tmp) {
 598                                         com_err (program_name, 0,
 599                                                  _("bad uid/user name - %s"),
 600                                                  optarg);
 601                                         usage();
 602                                 }
 603                                 u_flag = 1;
 604                                 open_flag = EXT2_FLAG_RW;
 605                                 break;
 606                         case 'U':
 607                                 new_UUID = optarg;
 608                                 U_flag = 1;
 609                                 open_flag = EXT2_FLAG_RW |
 610                                         EXT2_FLAG_JOURNAL_DEV_OK;
 611                                 break;
 612                         default:
 613                                 usage();
 614                 }
 615         if (optind < argc - 1 || optind == argc)
 616                 usage();
 617         if (!open_flag && !l_flag)
 618                 usage();
 619         device_name = argv[optind];
 620 }
 621
 622
 623
 624 int main (int argc, char ** argv)
 625 {
 626         errcode_t retval;
 627         ext2_filsys fs;
 628         struct ext2_super_block *sb;
 629
 630 #ifdef ENABLE_NLS
 631         setlocale(LC_MESSAGES, "");
 632         bindtextdomain(NLS_CAT_NAME, LOCALEDIR);
 633         textdomain(NLS_CAT_NAME);
 634 #endif
 635         if (argc && *argv)
 636                 program_name = *argv;
 637         initialize_ext2_error_table();
 638
 639         if (strcmp(get_progname(argv[0]), "e2label") == 0)
 640                 parse_e2label_options(argc, argv);
 641         else
 642                 parse_tune2fs_options(argc, argv);
 643
 644         retval = ext2fs_open (device_name, open_flag, 0, 0,
 645                               unix_io_manager, &fs);
 646         if (retval) {
 647                 com_err (program_name, retval, _("while trying to open %s"),
 648                          device_name);
 649                 fprintf(stderr,
 650                         _("Couldn't find valid filesystem superblock.\n"));
 651                 exit(1);
 652         }
 653         sb = fs->super;
 654         if (print_label) {
 655                 /* For e2label emulation */
 656                 printf("%.*s\n", (int) sizeof(sb->s_volume_name),
 657                        sb->s_volume_name);
 658                 exit(0);
 659         }
 660         retval = ext2fs_check_if_mounted(device_name, &mount_flags);
 661         if (retval) {
 662                 com_err("ext2fs_check_if_mount", retval,
 663                         _("while determining whether %s is mounted."),
 664                         device_name);
 665                 exit(1);
 666         }
 667         /* Normally we only need to write out the superblock */
 668         fs->flags |= EXT2_FLAG_SUPER_ONLY;
 669
 670         if (c_flag) {
 671                 sb->s_max_mnt_count = max_mount_count;
 672                 ext2fs_mark_super_dirty(fs);
 673                 printf (_("Setting maximal mount count to %d\n"),
 674                         max_mount_count);
 675         }
 676         if (C_flag) {
 677                 sb->s_mnt_count = mount_count;
 678                 ext2fs_mark_super_dirty(fs);
 679                 printf (_("Setting current mount count to %d\n"), mount_count);
 680         }
 681         if (e_flag) {
 682                 sb->s_errors = errors;
 683                 ext2fs_mark_super_dirty(fs);
 684                 printf (_("Setting error behavior to %d\n"), errors);
 685         }
 686         if (g_flag) {
 687                 sb->s_def_resgid = resgid;
 688                 ext2fs_mark_super_dirty(fs);
 689                 printf (_("Setting reserved blocks gid to %lu\n"), resgid);
 690         }
 691         if (i_flag) {
 692                 sb->s_checkinterval = interval;
 693                 ext2fs_mark_super_dirty(fs);
 694                 printf (_("Setting interval between check %lu seconds\n"), interval);
 695         }
 696         if (m_flag) {
 697                 sb->s_r_blocks_count = (sb->s_blocks_count / 100)
 698                         * reserved_ratio;
 699                 ext2fs_mark_super_dirty(fs);
 700                 printf (_("Setting reserved blocks percentage to %lu (%u blocks)\n"),
 701                         reserved_ratio, sb->s_r_blocks_count);
 702         }
 703         if (r_flag) {
 704                 if (reserved_blocks >= sb->s_blocks_count) {
 705                         com_err (program_name, 0,
 706                                  _("reserved blocks count is too big (%ul)"),
 707                                  reserved_blocks);
 708                         exit (1);
 709                 }
 710                 sb->s_r_blocks_count = reserved_blocks;
 711                 ext2fs_mark_super_dirty(fs);
 712                 printf (_("Setting reserved blocks count to %lu\n"),
 713                         reserved_blocks);
 714         }
 715         if (s_flag == 1) {
 716                 if (sb->s_feature_ro_compat &
 717                     EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER)
 718                         fprintf(stderr, _("\nThe filesystem already"
 719                                 " has sparse superblocks.\n"));
 720                 else {
 721                         sb->s_feature_ro_compat |=
 722                                 EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER;
 723                         sb->s_state &= ~EXT2_VALID_FS;
 724                         ext2fs_mark_super_dirty(fs);
 725                         printf(_("\nSparse superblock flag set.  %s"),
 726                                _(please_fsck));
 727                 }
 728         }
 729         if (s_flag == 0) {
 730                 if (!(sb->s_feature_ro_compat &
 731                       EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER))
 732                         fprintf(stderr, _("\nThe filesystem already"
 733                                 " has sparse superblocks disabled.\n"));
 734                 else {
 735                         sb->s_feature_ro_compat &=
 736                                 ~EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER;
 737                         sb->s_state &= ~EXT2_VALID_FS;
 738                         fs->flags |= EXT2_FLAG_MASTER_SB_ONLY;
 739                         ext2fs_mark_super_dirty(fs);
 740                         printf(_("\nSparse superblock flag cleared.  %s"),
 741                                _(please_fsck));
 742                 }
 743         }
 744         if (u_flag) {
 745                 sb->s_def_resuid = resuid;
 746                 ext2fs_mark_super_dirty(fs);
 747                 printf (_("Setting reserved blocks uid to %lu\n"), resuid);
 748         }
 749         if (L_flag) {
 750                 if (strlen(new_label) > sizeof(sb->s_volume_name))
 751                         fprintf(stderr, _("Warning: label too "
 752                                 "long, truncating.\n"));
 753                 memset(sb->s_volume_name, 0, sizeof(sb->s_volume_name));
 754                 strncpy(sb->s_volume_name, new_label,
 755                         sizeof(sb->s_volume_name));
 756                 ext2fs_mark_super_dirty(fs);
 757         }
 758         if (M_flag) {
 759                 memset(sb->s_last_mounted, 0, sizeof(sb->s_last_mounted));
 760                 strncpy(sb->s_last_mounted, new_last_mounted,
 761                         sizeof(sb->s_last_mounted));
 762                 ext2fs_mark_super_dirty(fs);
 763         }
 764         if (features_cmd)
 765                 update_feature_set(fs, features_cmd);
 766         if (journal_size || journal_device)
 767                 add_journal(fs);
 768
 769         if (U_flag) {
 770                 if ((strcasecmp(new_UUID, "null") == 0) ||
 771                     (strcasecmp(new_UUID, "clear") == 0)) {
 772                         uuid_clear(sb->s_uuid);
 773                 } else if (strcasecmp(new_UUID, "time") == 0) {
 774                         uuid_generate_time(sb->s_uuid);
 775                 } else if (strcasecmp(new_UUID, "random") == 0) {
 776                         uuid_generate(sb->s_uuid);
 777                 } else if (uuid_parse(new_UUID, sb->s_uuid)) {
 778                         com_err(program_name, 0, _("Invalid UUID format\n"));
 779                         exit(1);
 780                 }
 781                 ext2fs_mark_super_dirty(fs);
 782         }
 783
 784         if (l_flag)
 785                 list_super (sb);
 786         ext2fs_close (fs);
 787         exit (0);
 788 }