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 #define _XOPEN_SOURCE 500 /* for inclusion of strptime() */
  29 #define _BSD_SOURCE /* for inclusion of strcasecmp() */
  30 #include <fcntl.h>
  31 #include <grp.h>
  32 #ifdef HAVE_GETOPT_H
  33 #include <getopt.h>
  34 #else
  35 extern char *optarg;
  36 extern int optind;
  37 #endif
  38 #include <pwd.h>
  39 #include <stdio.h>
  40 #include <stdlib.h>
  41 #include <string.h>
  42 #include <time.h>
  43 #include <unistd.h>
  44 #include <sys/types.h>
  45
  46 #include "ext2fs/ext2_fs.h"
  47 #include "ext2fs/ext2fs.h"
  48 #include "et/com_err.h"
  49 #include "uuid/uuid.h"
  50 #include "e2p/e2p.h"
  51 #include "jfs_user.h"
  52 #include "util.h"
  53 #include "blkid/blkid.h"
  54
  55 #include "../version.h"
  56 #include "nls-enable.h"
  57
  58 const char * program_name = "tune2fs";
  59 char * device_name;
  60 char * new_label, *new_last_mounted, *new_UUID;
  61 char * io_options;
  62 static int c_flag, C_flag, e_flag, f_flag, g_flag, i_flag, l_flag, L_flag;
  63 static int m_flag, M_flag, r_flag, s_flag = -1, u_flag, U_flag, T_flag;
  64 static time_t last_check_time;
  65 static int print_label;
  66 static int max_mount_count, mount_count, mount_flags;
  67 static unsigned long interval, reserved_blocks;
  68 static double reserved_ratio;
  69 static unsigned long resgid, resuid;
  70 static unsigned short errors;
  71 static int open_flag;
  72 static char *features_cmd;
  73 static char *mntopts_cmd;
  74
  75 int journal_size, journal_flags;
  76 char *journal_device;
  77
  78 static const char *please_fsck = N_("Please run e2fsck on the filesystem.\n");
  79
  80 void do_findfs(int argc, char **argv);
  81
  82 static void usage(void)
  83 {
  84         fprintf(stderr,
  85                 _("Usage: %s [-c max_mounts_count] [-e errors_behavior] "
  86                   "[-g group]\n"
  87                   "\t[-i interval[d|m|w]] [-j] [-J journal_options]\n"
  88                   "\t[-l] [-s sparse_flag] [-m reserved_blocks_percent]\n"
  89                   "\t[-o [^]mount_options[,...]] [-r reserved_blocks_count]\n"
  90                   "\t[-u user] [-C mount_count] [-L volume_label] "
  91                   "[-M last_mounted_dir]\n"
  92                   "\t[-O [^]feature[,...]] [-T last_check_time] [-U UUID]"
  93                   " device\n"), program_name);
  94         exit (1);
  95 }
  96
  97 static __u32 ok_features[3] = {
  98         EXT3_FEATURE_COMPAT_HAS_JOURNAL |
  99                 EXT2_FEATURE_COMPAT_DIR_INDEX,  /* Compat */
 100         EXT2_FEATURE_INCOMPAT_FILETYPE,         /* Incompat */
 101         EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER     /* R/O compat */
 102 };
 103
 104 /*
 105  * Remove an external journal from the filesystem
 106  */
 107 static void remove_journal_device(ext2_filsys fs)
 108 {
 109         char            *journal_path;
 110         ext2_filsys     jfs;
 111         char            buf[1024];
 112         journal_superblock_t    *jsb;
 113         int             i, nr_users;
 114         errcode_t       retval;
 115         int             commit_remove_journal = 0;
 116         io_manager      io_ptr;
 117
 118         if (f_flag)
 119                 commit_remove_journal = 1; /* force removal even if error */
 120
 121         uuid_unparse(fs->super->s_journal_uuid, buf);
 122         journal_path = blkid_get_devname(NULL, "UUID", buf);
 123
 124         if (!journal_path) {
 125                 journal_path =
 126                         ext2fs_find_block_device(fs->super->s_journal_dev);
 127                 if (!journal_path)
 128                         return;
 129         }
 130
 131 #ifdef CONFIG_TESTIO_DEBUG
 132         io_ptr = test_io_manager;
 133         test_io_backing_manager = unix_io_manager;
 134 #else
 135         io_ptr = unix_io_manager;
 136 #endif
 137         retval = ext2fs_open(journal_path, EXT2_FLAG_RW|
 138                              EXT2_FLAG_JOURNAL_DEV_OK, 0,
 139                              fs->blocksize, io_ptr, &jfs);
 140         if (retval) {
 141                 com_err(program_name, retval,
 142                         _("while trying to open external journal"));
 143                 goto no_valid_journal;
 144         }
 145         if (!(jfs->super->s_feature_incompat & EXT3_FEATURE_INCOMPAT_JOURNAL_DEV)) {
 146                 fprintf(stderr, _("%s is not a journal device.\n"),
 147                         journal_path);
 148                 goto no_valid_journal;
 149         }
 150
 151         /* Get the journal superblock */
 152         if ((retval = io_channel_read_blk(jfs->io, 1, -1024, buf))) {
 153                 com_err(program_name, retval,
 154                         _("while reading journal superblock"));
 155                 goto no_valid_journal;
 156         }
 157
 158         jsb = (journal_superblock_t *) buf;
 159         if ((jsb->s_header.h_magic != (unsigned) ntohl(JFS_MAGIC_NUMBER)) ||
 160             (jsb->s_header.h_blocktype != (unsigned) ntohl(JFS_SUPERBLOCK_V2))) {
 161                 fputs(_("Journal superblock not found!\n"), stderr);
 162                 goto no_valid_journal;
 163         }
 164
 165         /* Find the filesystem UUID */
 166         nr_users = ntohl(jsb->s_nr_users);
 167         for (i=0; i < nr_users; i++) {
 168                 if (memcmp(fs->super->s_uuid,
 169                            &jsb->s_users[i*16], 16) == 0)
 170                         break;
 171         }
 172         if (i >= nr_users) {
 173                 fputs(_("Filesystem's UUID not found on journal device.\n"),
 174                       stderr);
 175                 commit_remove_journal = 1;
 176                 goto no_valid_journal;
 177         }
 178         nr_users--;
 179         for (i=0; i < nr_users; i++)
 180                 memcpy(&jsb->s_users[i*16], &jsb->s_users[(i+1)*16], 16);
 181         jsb->s_nr_users = htonl(nr_users);
 182
 183         /* Write back the journal superblock */
 184         if ((retval = io_channel_write_blk(jfs->io, 1, -1024, buf))) {
 185                 com_err(program_name, retval,
 186                         "while writing journal superblock.");
 187                 goto no_valid_journal;
 188         }
 189
 190         commit_remove_journal = 1;
 191
 192 no_valid_journal:
 193         if (commit_remove_journal == 0) {
 194                 fputs(_("Journal NOT removed\n"), stderr);
 195                 exit(1);
 196         }
 197         fs->super->s_journal_dev = 0;
 198         uuid_clear(fs->super->s_journal_uuid);
 199         ext2fs_mark_super_dirty(fs);
 200         fputs(_("Journal removed\n"), stdout);
 201         free(journal_path);
 202 }
 203
 204 /* Helper function for remove_journal_inode */
 205 static int release_blocks_proc(ext2_filsys fs, blk_t *blocknr,
 206                                int blockcnt EXT2FS_ATTR((unused)),
 207                                void *private EXT2FS_ATTR((unused)))
 208 {
 209         blk_t   block;
 210         int     group;
 211
 212         block = *blocknr;
 213         ext2fs_unmark_block_bitmap(fs->block_map,block);
 214         group = ext2fs_group_of_blk(fs, block);
 215         fs->group_desc[group].bg_free_blocks_count++;
 216         fs->super->s_free_blocks_count++;
 217         return 0;
 218 }
 219
 220 /*
 221  * Remove the journal inode from the filesystem
 222  */
 223 static void remove_journal_inode(ext2_filsys fs)
 224 {
 225         struct ext2_inode       inode;
 226         errcode_t               retval;
 227         ino_t                   ino = fs->super->s_journal_inum;
 228
 229         retval = ext2fs_read_inode(fs, ino,  &inode);
 230         if (retval) {
 231                 com_err(program_name, retval,
 232                         _("while reading journal inode"));
 233                 exit(1);
 234         }
 235         if (ino == EXT2_JOURNAL_INO) {
 236                 retval = ext2fs_read_bitmaps(fs);
 237                 if (retval) {
 238                         com_err(program_name, retval,
 239                                 _("while reading bitmaps"));
 240                         exit(1);
 241                 }
 242                 retval = ext2fs_block_iterate(fs, ino, 0, NULL,
 243                                               release_blocks_proc, NULL);
 244                 if (retval) {
 245                         com_err(program_name, retval,
 246                                 _("while clearing journal inode"));
 247                         exit(1);
 248                 }
 249                 memset(&inode, 0, sizeof(inode));
 250                 ext2fs_mark_bb_dirty(fs);
 251                 fs->flags &= ~EXT2_FLAG_SUPER_ONLY;
 252         } else
 253                 inode.i_flags &= ~EXT2_IMMUTABLE_FL;
 254         retval = ext2fs_write_inode(fs, ino, &inode);
 255         if (retval) {
 256                 com_err(program_name, retval,
 257                         _("while writing journal inode"));
 258                 exit(1);
 259         }
 260         fs->super->s_journal_inum = 0;
 261         ext2fs_mark_super_dirty(fs);
 262 }
 263
 264 /*
 265  * Update the default mount options
 266  */
 267 static void update_mntopts(ext2_filsys fs, char *mntopts)
 268 {
 269         struct ext2_super_block *sb= fs->super;
 270
 271         if (e2p_edit_mntopts(mntopts, &sb->s_default_mount_opts, ~0)) {
 272                 fprintf(stderr, _("Invalid mount option set: %s\n"),
 273                         mntopts);
 274                 exit(1);
 275         }
 276         ext2fs_mark_super_dirty(fs);
 277 }
 278
 279 /*
 280  * Update the feature set as provided by the user.
 281  */
 282 static void update_feature_set(ext2_filsys fs, char *features)
 283 {
 284         int sparse, old_sparse, filetype, old_filetype;
 285         int journal, old_journal, dxdir, old_dxdir;
 286         struct ext2_super_block *sb= fs->super;
 287         __u32   old_compat, old_incompat, old_ro_compat;
 288
 289         old_compat = sb->s_feature_compat;
 290         old_ro_compat = sb->s_feature_ro_compat;
 291         old_incompat = sb->s_feature_incompat;
 292
 293         old_sparse = sb->s_feature_ro_compat &
 294                 EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER;
 295         old_filetype = sb->s_feature_incompat &
 296                 EXT2_FEATURE_INCOMPAT_FILETYPE;
 297         old_journal = sb->s_feature_compat &
 298                 EXT3_FEATURE_COMPAT_HAS_JOURNAL;
 299         old_dxdir = sb->s_feature_compat &
 300                 EXT2_FEATURE_COMPAT_DIR_INDEX;
 301         if (e2p_edit_feature(features, &sb->s_feature_compat,
 302                              ok_features)) {
 303                 fprintf(stderr, _("Invalid filesystem option set: %s\n"),
 304                         features);
 305                 exit(1);
 306         }
 307         sparse = sb->s_feature_ro_compat &
 308                 EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER;
 309         filetype = sb->s_feature_incompat &
 310                 EXT2_FEATURE_INCOMPAT_FILETYPE;
 311         journal = sb->s_feature_compat &
 312                 EXT3_FEATURE_COMPAT_HAS_JOURNAL;
 313         dxdir = sb->s_feature_compat &
 314                 EXT2_FEATURE_COMPAT_DIR_INDEX;
 315         if (old_journal && !journal) {
 316                 if ((mount_flags & EXT2_MF_MOUNTED) &&
 317                     !(mount_flags & EXT2_MF_READONLY)) {
 318                         fputs(_("The has_journal flag may only be "
 319                                 "cleared when the filesystem is\n"
 320                                 "unmounted or mounted "
 321                                 "read-only.\n"), stderr);
 322                         exit(1);
 323                 }
 324                 if (sb->s_feature_incompat &
 325                     EXT3_FEATURE_INCOMPAT_RECOVER) {
 326                         fputs(_("The needs_recovery flag is set.  "
 327                                 "Please run e2fsck before clearing\n"
 328                                 "the has_journal flag.\n"), stderr);
 329                         exit(1);
 330                 }
 331                 if (sb->s_journal_inum) {
 332                         remove_journal_inode(fs);
 333                 }
 334                 if (sb->s_journal_dev) {
 335                         remove_journal_device(fs);
 336                 }
 337         }
 338         if (journal && !old_journal) {
 339                 /*
 340                  * If adding a journal flag, let the create journal
 341                  * code below handle creating setting the flag and
 342                  * creating the journal.  We supply a default size if
 343                  * necessary.
 344                  */
 345                 if (!journal_size)
 346                         journal_size = -1;
 347                 sb->s_feature_compat &= ~EXT3_FEATURE_COMPAT_HAS_JOURNAL;
 348         }
 349         if (dxdir && !old_dxdir) {
 350                 if (!sb->s_def_hash_version)
 351                         sb->s_def_hash_version = EXT2_HASH_TEA;
 352                 if (uuid_is_null((unsigned char *) sb->s_hash_seed))
 353                         uuid_generate((unsigned char *) sb->s_hash_seed);
 354         }
 355
 356         if (sb->s_rev_level == EXT2_GOOD_OLD_REV &&
 357             (sb->s_feature_compat || sb->s_feature_ro_compat ||
 358              sb->s_feature_incompat))
 359                 ext2fs_update_dynamic_rev(fs);
 360         if ((sparse != old_sparse) ||
 361             (filetype != old_filetype)) {
 362                 sb->s_state &= ~EXT2_VALID_FS;
 363                 printf("\n%s\n", _(please_fsck));
 364         }
 365         if ((old_compat != sb->s_feature_compat) ||
 366             (old_ro_compat != sb->s_feature_ro_compat) ||
 367             (old_incompat != sb->s_feature_incompat))
 368                 ext2fs_mark_super_dirty(fs);
 369 }
 370
 371 /*
 372  * Add a journal to the filesystem.
 373  */
 374 static void add_journal(ext2_filsys fs)
 375 {
 376         unsigned long journal_blocks;
 377         errcode_t       retval;
 378         ext2_filsys     jfs;
 379         io_manager      io_ptr;
 380
 381         if (fs->super->s_feature_compat &
 382             EXT3_FEATURE_COMPAT_HAS_JOURNAL) {
 383                 fputs(_("The filesystem already has a journal.\n"), stderr);
 384                 goto err;
 385         }
 386         if (journal_device) {
 387                 check_plausibility(journal_device);
 388                 check_mount(journal_device, 0, _("journal"));
 389 #ifdef CONFIG_TESTIO_DEBUG
 390                 io_ptr = test_io_manager;
 391                 test_io_backing_manager = unix_io_manager;
 392 #else
 393                 io_ptr = unix_io_manager;
 394 #endif
 395                 retval = ext2fs_open(journal_device, EXT2_FLAG_RW|
 396                                      EXT2_FLAG_JOURNAL_DEV_OK, 0,
 397                                      fs->blocksize, io_ptr, &jfs);
 398                 if (retval) {
 399                         com_err(program_name, retval,
 400                                 _("\n\twhile trying to open journal on %s\n"),
 401                                 journal_device);
 402                         goto err;
 403                 }
 404                 printf(_("Creating journal on device %s: "),
 405                        journal_device);
 406                 fflush(stdout);
 407
 408                 retval = ext2fs_add_journal_device(fs, jfs);
 409                 ext2fs_close(jfs);
 410                 if (retval) {
 411                         com_err (program_name, retval,
 412                                  _("while adding filesystem to journal on %s"),
 413                                  journal_device);
 414                         goto err;
 415                 }
 416                 fputs(_("done\n"), stdout);
 417         } else if (journal_size) {
 418                 fputs(_("Creating journal inode: "), stdout);
 419                 fflush(stdout);
 420                 journal_blocks = figure_journal_size(journal_size, fs);
 421
 422                 retval = ext2fs_add_journal_inode(fs, journal_blocks,
 423                                                   journal_flags);
 424                 if (retval) {
 425                         fprintf(stderr, "\n");
 426                         com_err(program_name, retval,
 427                                 _("\n\twhile trying to create journal file"));
 428                         exit(1);
 429                 } else
 430                         fputs(_("done\n"), stdout);
 431                 /*
 432                  * If the filesystem wasn't mounted, we need to force
 433                  * the block group descriptors out.
 434                  */
 435                 if ((mount_flags & EXT2_MF_MOUNTED) == 0)
 436                         fs->flags &= ~EXT2_FLAG_SUPER_ONLY;
 437         }
 438         print_check_message(fs);
 439         return;
 440
 441 err:
 442         if (journal_device)
 443                 free(journal_device);
 444         exit(1);
 445 }
 446
 447
 448 static void parse_e2label_options(int argc, char ** argv)
 449 {
 450         if ((argc < 2) || (argc > 3)) {
 451                 fputs(_("Usage: e2label device [newlabel]\n"), stderr);
 452                 exit(1);
 453         }
 454         io_options = strchr(argv[1], '?');
 455         if (io_options)
 456                 *io_options++ = 0;
 457         device_name = blkid_get_devname(NULL, argv[1], NULL);
 458         if (!device_name) {
 459                 com_err("e2label", 0, _("Unable to resolve '%s'"),
 460                         argv[1]);
 461                 exit(1);
 462         }
 463         if (argc == 3) {
 464                 open_flag = EXT2_FLAG_RW | EXT2_FLAG_JOURNAL_DEV_OK;
 465                 L_flag = 1;
 466                 new_label = argv[2];
 467         } else
 468                 print_label++;
 469 }
 470
 471 static time_t parse_time(char *str)
 472 {
 473         struct  tm      ts;
 474
 475         if (strcmp(str, "now") == 0) {
 476                 return (time(0));
 477         }
 478         memset(&ts, 0, sizeof(ts));
 479 #ifdef HAVE_STRPTIME
 480         strptime(str, "%Y%m%d%H%M%S", &ts);
 481 #else
 482         sscanf(str, "%4d%2d%2d%2d%2d%2d", &ts.tm_year, &ts.tm_mon,
 483                &ts.tm_mday, &ts.tm_hour, &ts.tm_min, &ts.tm_sec);
 484         ts.tm_year -= 1900;
 485         ts.tm_mon -= 1;
 486         if (ts.tm_year < 0 || ts.tm_mon < 0 || ts.tm_mon > 11 ||
 487             ts.tm_mday < 0 || ts.tm_mday > 31 || ts.tm_hour > 23 ||
 488             ts.tm_min > 59 || ts.tm_sec > 61)
 489                 ts.tm_mday = 0;
 490 #endif
 491         if (ts.tm_mday == 0) {
 492                 com_err(program_name, 0,
 493                         _("Couldn't parse date/time specifier: %s"),
 494                         str);
 495                 usage();
 496         }
 497         return (mktime(&ts));
 498 }
 499
 500 static void parse_tune2fs_options(int argc, char **argv)
 501 {
 502         int c;
 503         char * tmp;
 504         struct group * gr;
 505         struct passwd * pw;
 506
 507         printf("tune2fs %s (%s)\n", E2FSPROGS_VERSION, E2FSPROGS_DATE);
 508         while ((c = getopt(argc, argv, "c:e:fg:i:jlm:o:r:s:u:C:J:L:M:O:T:U:")) != EOF)
 509                 switch (c)
 510                 {
 511                         case 'c':
 512                                 max_mount_count = strtol (optarg, &tmp, 0);
 513                                 if (*tmp || max_mount_count > 16000) {
 514                                         com_err (program_name, 0,
 515                                                  _("bad mounts count - %s"),
 516                                                  optarg);
 517                                         usage();
 518                                 }
 519                                 if (max_mount_count == 0)
 520                                         max_mount_count = -1;
 521                                 c_flag = 1;
 522                                 open_flag = EXT2_FLAG_RW;
 523                                 break;
 524                         case 'C':
 525                                 mount_count = strtoul (optarg, &tmp, 0);
 526                                 if (*tmp || mount_count > 16000) {
 527                                         com_err (program_name, 0,
 528                                                  _("bad mounts count - %s"),
 529                                                  optarg);
 530                                         usage();
 531                                 }
 532                                 C_flag = 1;
 533                                 open_flag = EXT2_FLAG_RW;
 534                                 break;
 535                         case 'e':
 536                                 if (strcmp (optarg, "continue") == 0)
 537                                         errors = EXT2_ERRORS_CONTINUE;
 538                                 else if (strcmp (optarg, "remount-ro") == 0)
 539                                         errors = EXT2_ERRORS_RO;
 540                                 else if (strcmp (optarg, "panic") == 0)
 541                                         errors = EXT2_ERRORS_PANIC;
 542                                 else {
 543                                         com_err (program_name, 0,
 544                                                  _("bad error behavior - %s"),
 545                                                  optarg);
 546                                         usage();
 547                                 }
 548                                 e_flag = 1;
 549                                 open_flag = EXT2_FLAG_RW;
 550                                 break;
 551                         case 'f': /* Force */
 552                                 f_flag = 1;
 553                                 break;
 554                         case 'g':
 555                                 resgid = strtoul (optarg, &tmp, 0);
 556                                 if (*tmp) {
 557                                         gr = getgrnam (optarg);
 558                                         if (gr == NULL)
 559                                                 tmp = optarg;
 560                                         else {
 561                                                 resgid = gr->gr_gid;
 562                                                 *tmp =0;
 563                                         }
 564                                 }
 565                                 if (*tmp) {
 566                                         com_err (program_name, 0,
 567                                                  _("bad gid/group name - %s"),
 568                                                  optarg);
 569                                         usage();
 570                                 }
 571                                 g_flag = 1;
 572                                 open_flag = EXT2_FLAG_RW;
 573                                 break;
 574                         case 'i':
 575                                 interval = strtoul (optarg, &tmp, 0);
 576                                 switch (*tmp) {
 577                                 case 's':
 578                                         tmp++;
 579                                         break;
 580                                 case '\0':
 581                                 case 'd':
 582                                 case 'D': /* days */
 583                                         interval *= 86400;
 584                                         if (*tmp != '\0')
 585                                                 tmp++;
 586                                         break;
 587                                 case 'm':
 588                                 case 'M': /* months! */
 589                                         interval *= 86400 * 30;
 590                                         tmp++;
 591                                         break;
 592                                 case 'w':
 593                                 case 'W': /* weeks */
 594                                         interval *= 86400 * 7;
 595                                         tmp++;
 596                                         break;
 597                                 }
 598                                 if (*tmp || interval > (365 * 86400)) {
 599                                         com_err (program_name, 0,
 600                                                 _("bad interval - %s"), optarg);
 601                                         usage();
 602                                 }
 603                                 i_flag = 1;
 604                                 open_flag = EXT2_FLAG_RW;
 605                                 break;
 606                         case 'j':
 607                                 if (!journal_size)
 608                                         journal_size = -1;
 609                                 open_flag = EXT2_FLAG_RW;
 610                                 break;
 611                         case 'J':
 612                                 parse_journal_opts(optarg);
 613                                 open_flag = EXT2_FLAG_RW;
 614                                 break;
 615                         case 'l':
 616                                 l_flag = 1;
 617                                 break;
 618                         case 'L':
 619                                 new_label = optarg;
 620                                 L_flag = 1;
 621                                 open_flag = EXT2_FLAG_RW |
 622                                         EXT2_FLAG_JOURNAL_DEV_OK;
 623                                 break;
 624                         case 'm':
 625                                 reserved_ratio = strtod(optarg, &tmp);
 626                                 if (*tmp || reserved_ratio > 50) {
 627                                         com_err (program_name, 0,
 628                                                  _("bad reserved block ratio - %s"),
 629                                                  optarg);
 630                                         usage();
 631                                 }
 632                                 m_flag = 1;
 633                                 open_flag = EXT2_FLAG_RW;
 634                                 break;
 635                         case 'M':
 636                                 new_last_mounted = optarg;
 637                                 M_flag = 1;
 638                                 open_flag = EXT2_FLAG_RW;
 639                                 break;
 640                         case 'o':
 641                                 if (mntopts_cmd) {
 642                                         com_err (program_name, 0,
 643                                          _("-o may only be specified once"));
 644                                         usage();
 645                                 }
 646                                 mntopts_cmd = optarg;
 647                                 open_flag = EXT2_FLAG_RW;
 648                                 break;
 649
 650                         case 'O':
 651                                 if (features_cmd) {
 652                                         com_err (program_name, 0,
 653                                          _("-O may only be specified once"));
 654                                         usage();
 655                                 }
 656                                 features_cmd = optarg;
 657                                 open_flag = EXT2_FLAG_RW;
 658                                 break;
 659                         case 'r':
 660                                 reserved_blocks = strtoul (optarg, &tmp, 0);
 661                                 if (*tmp) {
 662                                         com_err (program_name, 0,
 663                                                  _("bad reserved blocks count - %s"),
 664                                                  optarg);
 665                                         usage();
 666                                 }
 667                                 r_flag = 1;
 668                                 open_flag = EXT2_FLAG_RW;
 669                                 break;
 670                         case 's':
 671                                 s_flag = atoi(optarg);
 672                                 open_flag = EXT2_FLAG_RW;
 673                                 break;
 674                         case 'T':
 675                                 T_flag = 1;
 676                                 last_check_time = parse_time(optarg);
 677                                 open_flag = EXT2_FLAG_RW;
 678                                 break;
 679                         case 'u':
 680                                 resuid = strtoul (optarg, &tmp, 0);
 681                                 if (*tmp) {
 682                                         pw = getpwnam (optarg);
 683                                         if (pw == NULL)
 684                                                 tmp = optarg;
 685                                         else {
 686                                                 resuid = pw->pw_uid;
 687                                                 *tmp = 0;
 688                                         }
 689                                 }
 690                                 if (*tmp) {
 691                                         com_err (program_name, 0,
 692                                                  _("bad uid/user name - %s"),
 693                                                  optarg);
 694                                         usage();
 695                                 }
 696                                 u_flag = 1;
 697                                 open_flag = EXT2_FLAG_RW;
 698                                 break;
 699                         case 'U':
 700                                 new_UUID = optarg;
 701                                 U_flag = 1;
 702                                 open_flag = EXT2_FLAG_RW |
 703                                         EXT2_FLAG_JOURNAL_DEV_OK;
 704                                 break;
 705                         default:
 706                                 usage();
 707                 }
 708         if (optind < argc - 1 || optind == argc)
 709                 usage();
 710         if (!open_flag && !l_flag)
 711                 usage();
 712         io_options = strchr(argv[optind], '?');
 713         if (io_options)
 714                 *io_options++ = 0;
 715         device_name = blkid_get_devname(NULL, argv[optind], NULL);
 716         if (!device_name) {
 717                 com_err("tune2fs", 0, _("Unable to resolve '%s'"),
 718                         argv[optind]);
 719                 exit(1);
 720         }
 721 }
 722
 723 void do_findfs(int argc, char **argv)
 724 {
 725         char    *dev;
 726
 727         if ((argc != 2) ||
 728             (strncmp(argv[1], "LABEL=", 6) && strncmp(argv[1], "UUID=", 5))) {
 729                 fprintf(stderr, "Usage: findfs LABEL=<label>|UUID=<uuid>\n");
 730                 exit(2);
 731         }
 732         dev = blkid_get_devname(NULL, argv[1], NULL);
 733         if (!dev) {
 734                 com_err("findfs", 0, _("Unable to resolve '%s'"),
 735                         argv[1]);
 736                 exit(1);
 737         }
 738         puts(dev);
 739         exit(0);
 740 }
 741
 742
 743 int main (int argc, char ** argv)
 744 {
 745         errcode_t retval;
 746         ext2_filsys fs;
 747         struct ext2_super_block *sb;
 748         io_manager io_ptr;
 749
 750 #ifdef ENABLE_NLS
 751         setlocale(LC_MESSAGES, "");
 752         setlocale(LC_CTYPE, "");
 753         bindtextdomain(NLS_CAT_NAME, LOCALEDIR);
 754         textdomain(NLS_CAT_NAME);
 755 #endif
 756         if (argc && *argv)
 757                 program_name = *argv;
 758         initialize_ext2_error_table();
 759
 760         if (strcmp(get_progname(argv[0]), "findfs") == 0)
 761                 do_findfs(argc, argv);
 762         if (strcmp(get_progname(argv[0]), "e2label") == 0)
 763                 parse_e2label_options(argc, argv);
 764         else
 765                 parse_tune2fs_options(argc, argv);
 766
 767 #ifdef CONFIG_TESTIO_DEBUG
 768         io_ptr = test_io_manager;
 769         test_io_backing_manager = unix_io_manager;
 770 #else
 771         io_ptr = unix_io_manager;
 772 #endif
 773         retval = ext2fs_open2(device_name, io_options, open_flag,
 774                               0, 0, io_ptr, &fs);
 775         if (retval) {
 776                 com_err (program_name, retval, _("while trying to open %s"),
 777                          device_name);
 778                 fprintf(stderr,
 779                         _("Couldn't find valid filesystem superblock.\n"));
 780                 exit(1);
 781         }
 782         sb = fs->super;
 783         if (print_label) {
 784                 /* For e2label emulation */
 785                 printf("%.*s\n", (int) sizeof(sb->s_volume_name),
 786                        sb->s_volume_name);
 787                 exit(0);
 788         }
 789         retval = ext2fs_check_if_mounted(device_name, &mount_flags);
 790         if (retval) {
 791                 com_err("ext2fs_check_if_mount", retval,
 792                         _("while determining whether %s is mounted."),
 793                         device_name);
 794                 exit(1);
 795         }
 796         /* Normally we only need to write out the superblock */
 797         fs->flags |= EXT2_FLAG_SUPER_ONLY;
 798
 799         if (c_flag) {
 800                 sb->s_max_mnt_count = max_mount_count;
 801                 ext2fs_mark_super_dirty(fs);
 802                 printf (_("Setting maximal mount count to %d\n"),
 803                         max_mount_count);
 804         }
 805         if (C_flag) {
 806                 sb->s_mnt_count = mount_count;
 807                 ext2fs_mark_super_dirty(fs);
 808                 printf (_("Setting current mount count to %d\n"), mount_count);
 809         }
 810         if (e_flag) {
 811                 sb->s_errors = errors;
 812                 ext2fs_mark_super_dirty(fs);
 813                 printf (_("Setting error behavior to %d\n"), errors);
 814         }
 815         if (g_flag) {
 816                 sb->s_def_resgid = resgid;
 817                 ext2fs_mark_super_dirty(fs);
 818                 printf (_("Setting reserved blocks gid to %lu\n"), resgid);
 819         }
 820         if (i_flag) {
 821                 sb->s_checkinterval = interval;
 822                 ext2fs_mark_super_dirty(fs);
 823                 printf (_("Setting interval between checks to %lu seconds\n"), interval);
 824         }
 825         if (m_flag) {
 826                 sb->s_r_blocks_count = sb->s_blocks_count * reserved_ratio /100;
 827                 ext2fs_mark_super_dirty(fs);
 828                 printf (_("Setting reserved blocks percentage to %g%% (%u blocks)\n"),
 829                         reserved_ratio, sb->s_r_blocks_count);
 830         }
 831         if (r_flag) {
 832                 if (reserved_blocks >= sb->s_blocks_count/2) {
 833                         com_err (program_name, 0,
 834                                  _("reserved blocks count is too big (%lu)"),
 835                                  reserved_blocks);
 836                         exit (1);
 837                 }
 838                 sb->s_r_blocks_count = reserved_blocks;
 839                 ext2fs_mark_super_dirty(fs);
 840                 printf (_("Setting reserved blocks count to %lu\n"),
 841                         reserved_blocks);
 842         }
 843         if (s_flag == 1) {
 844                 if (sb->s_feature_ro_compat &
 845                     EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER)
 846                         fputs(_("\nThe filesystem already has sparse "
 847                                 "superblocks.\n"), stderr);
 848                 else {
 849                         sb->s_feature_ro_compat |=
 850                                 EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER;
 851                         sb->s_state &= ~EXT2_VALID_FS;
 852                         ext2fs_mark_super_dirty(fs);
 853                         printf(_("\nSparse superblock flag set.  %s"),
 854                                _(please_fsck));
 855                 }
 856         }
 857         if (s_flag == 0) {
 858                 if (!(sb->s_feature_ro_compat &
 859                       EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER))
 860                         fputs(_("\nThe filesystem already has sparse "
 861                                 "superblocks disabled.\n"), stderr);
 862                 else {
 863                         sb->s_feature_ro_compat &=
 864                                 ~EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER;
 865                         sb->s_state &= ~EXT2_VALID_FS;
 866                         fs->flags |= EXT2_FLAG_MASTER_SB_ONLY;
 867                         ext2fs_mark_super_dirty(fs);
 868                         printf(_("\nSparse superblock flag cleared.  %s"),
 869                                _(please_fsck));
 870                 }
 871         }
 872         if (T_flag) {
 873                 sb->s_lastcheck = last_check_time;
 874                 ext2fs_mark_super_dirty(fs);
 875                 printf(_("Setting time filesystem last checked to %s\n"),
 876                        ctime(&last_check_time));
 877         }
 878         if (u_flag) {
 879                 sb->s_def_resuid = resuid;
 880                 ext2fs_mark_super_dirty(fs);
 881                 printf (_("Setting reserved blocks uid to %lu\n"), resuid);
 882         }
 883         if (L_flag) {
 884                 if (strlen(new_label) > sizeof(sb->s_volume_name))
 885                         fputs(_("Warning: label too long, truncating.\n"),
 886                               stderr);
 887                 memset(sb->s_volume_name, 0, sizeof(sb->s_volume_name));
 888                 strncpy(sb->s_volume_name, new_label,
 889                         sizeof(sb->s_volume_name));
 890                 ext2fs_mark_super_dirty(fs);
 891         }
 892         if (M_flag) {
 893                 memset(sb->s_last_mounted, 0, sizeof(sb->s_last_mounted));
 894                 strncpy(sb->s_last_mounted, new_last_mounted,
 895                         sizeof(sb->s_last_mounted));
 896                 ext2fs_mark_super_dirty(fs);
 897         }
 898         if (mntopts_cmd)
 899                 update_mntopts(fs, mntopts_cmd);
 900         if (features_cmd)
 901                 update_feature_set(fs, features_cmd);
 902         if (journal_size || journal_device)
 903                 add_journal(fs);
 904
 905         if (U_flag) {
 906                 if ((strcasecmp(new_UUID, "null") == 0) ||
 907                     (strcasecmp(new_UUID, "clear") == 0)) {
 908                         uuid_clear(sb->s_uuid);
 909                 } else if (strcasecmp(new_UUID, "time") == 0) {
 910                         uuid_generate_time(sb->s_uuid);
 911                 } else if (strcasecmp(new_UUID, "random") == 0) {
 912                         uuid_generate(sb->s_uuid);
 913                 } else if (uuid_parse(new_UUID, sb->s_uuid)) {
 914                         com_err(program_name, 0, _("Invalid UUID format\n"));
 915                         exit(1);
 916                 }
 917                 ext2fs_mark_super_dirty(fs);
 918         }
 919
 920         if (l_flag)
 921                 list_super (sb);
 922         return (ext2fs_close (fs) ? 1 : 0);
 923 }