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