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                 EXT4_FEATURE_INCOMPAT_FLEX_BG,
 102         EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER     /* R/O compat */
 103 };
 104
 105 /*
 106  * Remove an external journal from the filesystem
 107  */
 108 static void remove_journal_device(ext2_filsys fs)
 109 {
 110         char            *journal_path;
 111         ext2_filsys     jfs;
 112         char            buf[1024];
 113         journal_superblock_t    *jsb;
 114         int             i, nr_users;
 115         errcode_t       retval;
 116         int             commit_remove_journal = 0;
 117         io_manager      io_ptr;
 118
 119         if (f_flag)
 120                 commit_remove_journal = 1; /* force removal even if error */
 121
 122         uuid_unparse(fs->super->s_journal_uuid, buf);
 123         journal_path = blkid_get_devname(NULL, "UUID", buf);
 124
 125         if (!journal_path) {
 126                 journal_path =
 127                         ext2fs_find_block_device(fs->super->s_journal_dev);
 128                 if (!journal_path)
 129                         return;
 130         }
 131
 132 #ifdef CONFIG_TESTIO_DEBUG
 133         io_ptr = test_io_manager;
 134         test_io_backing_manager = unix_io_manager;
 135 #else
 136         io_ptr = unix_io_manager;
 137 #endif
 138         retval = ext2fs_open(journal_path, EXT2_FLAG_RW|
 139                              EXT2_FLAG_JOURNAL_DEV_OK, 0,
 140                              fs->blocksize, io_ptr, &jfs);
 141         if (retval) {
 142                 com_err(program_name, retval,
 143                         _("while trying to open external journal"));
 144                 goto no_valid_journal;
 145         }
 146         if (!(jfs->super->s_feature_incompat & EXT3_FEATURE_INCOMPAT_JOURNAL_DEV)) {
 147                 fprintf(stderr, _("%s is not a journal device.\n"),
 148                         journal_path);
 149                 goto no_valid_journal;
 150         }
 151
 152         /* Get the journal superblock */
 153         if ((retval = io_channel_read_blk(jfs->io, 1, -1024, buf))) {
 154                 com_err(program_name, retval,
 155                         _("while reading journal superblock"));
 156                 goto no_valid_journal;
 157         }
 158
 159         jsb = (journal_superblock_t *) buf;
 160         if ((jsb->s_header.h_magic != (unsigned) ntohl(JFS_MAGIC_NUMBER)) ||
 161             (jsb->s_header.h_blocktype != (unsigned) ntohl(JFS_SUPERBLOCK_V2))) {
 162                 fputs(_("Journal superblock not found!\n"), stderr);
 163                 goto no_valid_journal;
 164         }
 165
 166         /* Find the filesystem UUID */
 167         nr_users = ntohl(jsb->s_nr_users);
 168         for (i=0; i < nr_users; i++) {
 169                 if (memcmp(fs->super->s_uuid,
 170                            &jsb->s_users[i*16], 16) == 0)
 171                         break;
 172         }
 173         if (i >= nr_users) {
 174                 fputs(_("Filesystem's UUID not found on journal device.\n"),
 175                       stderr);
 176                 commit_remove_journal = 1;
 177                 goto no_valid_journal;
 178         }
 179         nr_users--;
 180         for (i=0; i < nr_users; i++)
 181                 memcpy(&jsb->s_users[i*16], &jsb->s_users[(i+1)*16], 16);
 182         jsb->s_nr_users = htonl(nr_users);
 183
 184         /* Write back the journal superblock */
 185         if ((retval = io_channel_write_blk(jfs->io, 1, -1024, buf))) {
 186                 com_err(program_name, retval,
 187                         "while writing journal superblock.");
 188                 goto no_valid_journal;
 189         }
 190
 191         commit_remove_journal = 1;
 192
 193 no_valid_journal:
 194         if (commit_remove_journal == 0) {
 195                 fputs(_("Journal NOT removed\n"), stderr);
 196                 exit(1);
 197         }
 198         fs->super->s_journal_dev = 0;
 199         uuid_clear(fs->super->s_journal_uuid);
 200         ext2fs_mark_super_dirty(fs);
 201         fputs(_("Journal removed\n"), stdout);
 202         free(journal_path);
 203 }
 204
 205 /* Helper function for remove_journal_inode */
 206 static int release_blocks_proc(ext2_filsys fs, blk_t *blocknr,
 207                                int blockcnt EXT2FS_ATTR((unused)),
 208                                void *private EXT2FS_ATTR((unused)))
 209 {
 210         blk_t   block;
 211         int     group;
 212
 213         block = *blocknr;
 214         ext2fs_unmark_block_bitmap(fs->block_map,block);
 215         group = ext2fs_group_of_blk(fs, block);
 216         fs->group_desc[group].bg_free_blocks_count++;
 217         fs->super->s_free_blocks_count++;
 218         return 0;
 219 }
 220
 221 /*
 222  * Remove the journal inode from the filesystem
 223  */
 224 static void remove_journal_inode(ext2_filsys fs)
 225 {
 226         struct ext2_inode       inode;
 227         errcode_t               retval;
 228         ino_t                   ino = fs->super->s_journal_inum;
 229
 230         retval = ext2fs_read_inode(fs, ino,  &inode);
 231         if (retval) {
 232                 com_err(program_name, retval,
 233                         _("while reading journal inode"));
 234                 exit(1);
 235         }
 236         if (ino == EXT2_JOURNAL_INO) {
 237                 retval = ext2fs_read_bitmaps(fs);
 238                 if (retval) {
 239                         com_err(program_name, retval,
 240                                 _("while reading bitmaps"));
 241                         exit(1);
 242                 }
 243                 retval = ext2fs_block_iterate(fs, ino, 0, NULL,
 244                                               release_blocks_proc, NULL);
 245                 if (retval) {
 246                         com_err(program_name, retval,
 247                                 _("while clearing journal inode"));
 248                         exit(1);
 249                 }
 250                 memset(&inode, 0, sizeof(inode));
 251                 ext2fs_mark_bb_dirty(fs);
 252                 fs->flags &= ~EXT2_FLAG_SUPER_ONLY;
 253         } else
 254                 inode.i_flags &= ~EXT2_IMMUTABLE_FL;
 255         retval = ext2fs_write_inode(fs, ino, &inode);
 256         if (retval) {
 257                 com_err(program_name, retval,
 258                         _("while writing journal inode"));
 259                 exit(1);
 260         }
 261         fs->super->s_journal_inum = 0;
 262         ext2fs_mark_super_dirty(fs);
 263 }
 264
 265 /*
 266  * Update the default mount options
 267  */
 268 static void update_mntopts(ext2_filsys fs, char *mntopts)
 269 {
 270         struct ext2_super_block *sb= fs->super;
 271
 272         if (e2p_edit_mntopts(mntopts, &sb->s_default_mount_opts, ~0)) {
 273                 fprintf(stderr, _("Invalid mount option set: %s\n"),
 274                         mntopts);
 275                 exit(1);
 276         }
 277         ext2fs_mark_super_dirty(fs);
 278 }
 279
 280 /*
 281  * Update the feature set as provided by the user.
 282  */
 283 static void update_feature_set(ext2_filsys fs, char *features)
 284 {
 285         int sparse, old_sparse, filetype, old_filetype;
 286         int journal, old_journal, dxdir, old_dxdir;
 287         int flex_bg, old_flex_bg;
 288         struct ext2_super_block *sb= fs->super;
 289         __u32   old_compat, old_incompat, old_ro_compat;
 290
 291         old_compat = sb->s_feature_compat;
 292         old_ro_compat = sb->s_feature_ro_compat;
 293         old_incompat = sb->s_feature_incompat;
 294
 295         old_sparse = sb->s_feature_ro_compat &
 296                 EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER;
 297         old_filetype = sb->s_feature_incompat &
 298                 EXT2_FEATURE_INCOMPAT_FILETYPE;
 299         old_flex_bg = sb->s_feature_incompat &
 300                 EXT4_FEATURE_INCOMPAT_FLEX_BG;
 301         old_journal = sb->s_feature_compat &
 302                 EXT3_FEATURE_COMPAT_HAS_JOURNAL;
 303         old_dxdir = sb->s_feature_compat &
 304                 EXT2_FEATURE_COMPAT_DIR_INDEX;
 305         if (e2p_edit_feature(features, &sb->s_feature_compat,
 306                              ok_features)) {
 307                 fprintf(stderr, _("Invalid filesystem option set: %s\n"),
 308                         features);
 309                 exit(1);
 310         }
 311         sparse = sb->s_feature_ro_compat &
 312                 EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER;
 313         filetype = sb->s_feature_incompat &
 314                 EXT2_FEATURE_INCOMPAT_FILETYPE;
 315         flex_bg = sb->s_feature_incompat &
 316                 EXT4_FEATURE_INCOMPAT_FLEX_BG;
 317         journal = sb->s_feature_compat &
 318                 EXT3_FEATURE_COMPAT_HAS_JOURNAL;
 319         dxdir = sb->s_feature_compat &
 320                 EXT2_FEATURE_COMPAT_DIR_INDEX;
 321         if (old_journal && !journal) {
 322                 if ((mount_flags & EXT2_MF_MOUNTED) &&
 323                     !(mount_flags & EXT2_MF_READONLY)) {
 324                         fputs(_("The has_journal flag may only be "
 325                                 "cleared when the filesystem is\n"
 326                                 "unmounted or mounted "
 327                                 "read-only.\n"), stderr);
 328                         exit(1);
 329                 }
 330                 if (sb->s_feature_incompat &
 331                     EXT3_FEATURE_INCOMPAT_RECOVER) {
 332                         fputs(_("The needs_recovery flag is set.  "
 333                                 "Please run e2fsck before clearing\n"
 334                                 "the has_journal flag.\n"), stderr);
 335                         exit(1);
 336                 }
 337                 if (sb->s_journal_inum) {
 338                         remove_journal_inode(fs);
 339                 }
 340                 if (sb->s_journal_dev) {
 341                         remove_journal_device(fs);
 342                 }
 343         }
 344         if (journal && !old_journal) {
 345                 /*
 346                  * If adding a journal flag, let the create journal
 347                  * code below handle creating setting the flag and
 348                  * creating the journal.  We supply a default size if
 349                  * necessary.
 350                  */
 351                 if (!journal_size)
 352                         journal_size = -1;
 353                 sb->s_feature_compat &= ~EXT3_FEATURE_COMPAT_HAS_JOURNAL;
 354         }
 355         if (dxdir && !old_dxdir) {
 356                 if (!sb->s_def_hash_version)
 357                         sb->s_def_hash_version = EXT2_HASH_TEA;
 358                 if (uuid_is_null((unsigned char *) sb->s_hash_seed))
 359                         uuid_generate((unsigned char *) sb->s_hash_seed);
 360         }
 361         if (!flex_bg && old_flex_bg) {
 362                 if (ext2fs_check_desc(fs)) {
 363                         fputs(_("Clearing the flex_bg flag would "
 364                                 "cause the the filesystem to be\n"
 365                                 "inconsistent.\n"), stderr);
 366                         exit(1);
 367                 }
 368         }
 369
 370         if (sb->s_rev_level == EXT2_GOOD_OLD_REV &&
 371             (sb->s_feature_compat || sb->s_feature_ro_compat ||
 372              sb->s_feature_incompat))
 373                 ext2fs_update_dynamic_rev(fs);
 374         if ((sparse != old_sparse) ||
 375             (filetype != old_filetype)) {
 376                 sb->s_state &= ~EXT2_VALID_FS;
 377                 printf("\n%s\n", _(please_fsck));
 378         }
 379         if ((old_compat != sb->s_feature_compat) ||
 380             (old_ro_compat != sb->s_feature_ro_compat) ||
 381             (old_incompat != sb->s_feature_incompat))
 382                 ext2fs_mark_super_dirty(fs);
 383 }
 384
 385 /*
 386  * Add a journal to the filesystem.
 387  */
 388 static void add_journal(ext2_filsys fs)
 389 {
 390         unsigned long journal_blocks;
 391         errcode_t       retval;
 392         ext2_filsys     jfs;
 393         io_manager      io_ptr;
 394
 395         if (fs->super->s_feature_compat &
 396             EXT3_FEATURE_COMPAT_HAS_JOURNAL) {
 397                 fputs(_("The filesystem already has a journal.\n"), stderr);
 398                 goto err;
 399         }
 400         if (journal_device) {
 401                 check_plausibility(journal_device);
 402                 check_mount(journal_device, 0, _("journal"));
 403 #ifdef CONFIG_TESTIO_DEBUG
 404                 io_ptr = test_io_manager;
 405                 test_io_backing_manager = unix_io_manager;
 406 #else
 407                 io_ptr = unix_io_manager;
 408 #endif
 409                 retval = ext2fs_open(journal_device, EXT2_FLAG_RW|
 410                                      EXT2_FLAG_JOURNAL_DEV_OK, 0,
 411                                      fs->blocksize, io_ptr, &jfs);
 412                 if (retval) {
 413                         com_err(program_name, retval,
 414                                 _("\n\twhile trying to open journal on %s\n"),
 415                                 journal_device);
 416                         goto err;
 417                 }
 418                 printf(_("Creating journal on device %s: "),
 419                        journal_device);
 420                 fflush(stdout);
 421
 422                 retval = ext2fs_add_journal_device(fs, jfs);
 423                 ext2fs_close(jfs);
 424                 if (retval) {
 425                         com_err (program_name, retval,
 426                                  _("while adding filesystem to journal on %s"),
 427                                  journal_device);
 428                         goto err;
 429                 }
 430                 fputs(_("done\n"), stdout);
 431         } else if (journal_size) {
 432                 fputs(_("Creating journal inode: "), stdout);
 433                 fflush(stdout);
 434                 journal_blocks = figure_journal_size(journal_size, fs);
 435
 436                 retval = ext2fs_add_journal_inode(fs, journal_blocks,
 437                                                   journal_flags);
 438                 if (retval) {
 439                         fprintf(stderr, "\n");
 440                         com_err(program_name, retval,
 441                                 _("\n\twhile trying to create journal file"));
 442                         exit(1);
 443                 } else
 444                         fputs(_("done\n"), stdout);
 445                 /*
 446                  * If the filesystem wasn't mounted, we need to force
 447                  * the block group descriptors out.
 448                  */
 449                 if ((mount_flags & EXT2_MF_MOUNTED) == 0)
 450                         fs->flags &= ~EXT2_FLAG_SUPER_ONLY;
 451         }
 452         print_check_message(fs);
 453         return;
 454
 455 err:
 456         if (journal_device)
 457                 free(journal_device);
 458         exit(1);
 459 }
 460
 461
 462 static void parse_e2label_options(int argc, char ** argv)
 463 {
 464         if ((argc < 2) || (argc > 3)) {
 465                 fputs(_("Usage: e2label device [newlabel]\n"), stderr);
 466                 exit(1);
 467         }
 468         io_options = strchr(argv[1], '?');
 469         if (io_options)
 470                 *io_options++ = 0;
 471         device_name = blkid_get_devname(NULL, argv[1], NULL);
 472         if (!device_name) {
 473                 com_err("e2label", 0, _("Unable to resolve '%s'"),
 474                         argv[1]);
 475                 exit(1);
 476         }
 477         if (argc == 3) {
 478                 open_flag = EXT2_FLAG_RW | EXT2_FLAG_JOURNAL_DEV_OK;
 479                 L_flag = 1;
 480                 new_label = argv[2];
 481         } else
 482                 print_label++;
 483 }
 484
 485 static time_t parse_time(char *str)
 486 {
 487         struct  tm      ts;
 488
 489         if (strcmp(str, "now") == 0) {
 490                 return (time(0));
 491         }
 492         memset(&ts, 0, sizeof(ts));
 493 #ifdef HAVE_STRPTIME
 494         strptime(str, "%Y%m%d%H%M%S", &ts);
 495 #else
 496         sscanf(str, "%4d%2d%2d%2d%2d%2d", &ts.tm_year, &ts.tm_mon,
 497                &ts.tm_mday, &ts.tm_hour, &ts.tm_min, &ts.tm_sec);
 498         ts.tm_year -= 1900;
 499         ts.tm_mon -= 1;
 500         if (ts.tm_year < 0 || ts.tm_mon < 0 || ts.tm_mon > 11 ||
 501             ts.tm_mday < 0 || ts.tm_mday > 31 || ts.tm_hour > 23 ||
 502             ts.tm_min > 59 || ts.tm_sec > 61)
 503                 ts.tm_mday = 0;
 504 #endif
 505         if (ts.tm_mday == 0) {
 506                 com_err(program_name, 0,
 507                         _("Couldn't parse date/time specifier: %s"),
 508                         str);
 509                 usage();
 510         }
 511         return (mktime(&ts));
 512 }
 513
 514 static void parse_tune2fs_options(int argc, char **argv)
 515 {
 516         int c;
 517         char * tmp;
 518         struct group * gr;
 519         struct passwd * pw;
 520
 521         printf("tune2fs %s (%s)\n", E2FSPROGS_VERSION, E2FSPROGS_DATE);
 522         while ((c = getopt(argc, argv, "c:e:fg:i:jlm:o:r:s:u:C:J:L:M:O:T:U:")) != EOF)
 523                 switch (c)
 524                 {
 525                         case 'c':
 526                                 max_mount_count = strtol (optarg, &tmp, 0);
 527                                 if (*tmp || max_mount_count > 16000) {
 528                                         com_err (program_name, 0,
 529                                                  _("bad mounts count - %s"),
 530                                                  optarg);
 531                                         usage();
 532                                 }
 533                                 if (max_mount_count == 0)
 534                                         max_mount_count = -1;
 535                                 c_flag = 1;
 536                                 open_flag = EXT2_FLAG_RW;
 537                                 break;
 538                         case 'C':
 539                                 mount_count = strtoul (optarg, &tmp, 0);
 540                                 if (*tmp || mount_count > 16000) {
 541                                         com_err (program_name, 0,
 542                                                  _("bad mounts count - %s"),
 543                                                  optarg);
 544                                         usage();
 545                                 }
 546                                 C_flag = 1;
 547                                 open_flag = EXT2_FLAG_RW;
 548                                 break;
 549                         case 'e':
 550                                 if (strcmp (optarg, "continue") == 0)
 551                                         errors = EXT2_ERRORS_CONTINUE;
 552                                 else if (strcmp (optarg, "remount-ro") == 0)
 553                                         errors = EXT2_ERRORS_RO;
 554                                 else if (strcmp (optarg, "panic") == 0)
 555                                         errors = EXT2_ERRORS_PANIC;
 556                                 else {
 557                                         com_err (program_name, 0,
 558                                                  _("bad error behavior - %s"),
 559                                                  optarg);
 560                                         usage();
 561                                 }
 562                                 e_flag = 1;
 563                                 open_flag = EXT2_FLAG_RW;
 564                                 break;
 565                         case 'f': /* Force */
 566                                 f_flag = 1;
 567                                 break;
 568                         case 'g':
 569                                 resgid = strtoul (optarg, &tmp, 0);
 570                                 if (*tmp) {
 571                                         gr = getgrnam (optarg);
 572                                         if (gr == NULL)
 573                                                 tmp = optarg;
 574                                         else {
 575                                                 resgid = gr->gr_gid;
 576                                                 *tmp =0;
 577                                         }
 578                                 }
 579                                 if (*tmp) {
 580                                         com_err (program_name, 0,
 581                                                  _("bad gid/group name - %s"),
 582                                                  optarg);
 583                                         usage();
 584                                 }
 585                                 g_flag = 1;
 586                                 open_flag = EXT2_FLAG_RW;
 587                                 break;
 588                         case 'i':
 589                                 interval = strtoul (optarg, &tmp, 0);
 590                                 switch (*tmp) {
 591                                 case 's':
 592                                         tmp++;
 593                                         break;
 594                                 case '\0':
 595                                 case 'd':
 596                                 case 'D': /* days */
 597                                         interval *= 86400;
 598                                         if (*tmp != '\0')
 599                                                 tmp++;
 600                                         break;
 601                                 case 'm':
 602                                 case 'M': /* months! */
 603                                         interval *= 86400 * 30;
 604                                         tmp++;
 605                                         break;
 606                                 case 'w':
 607                                 case 'W': /* weeks */
 608                                         interval *= 86400 * 7;
 609                                         tmp++;
 610                                         break;
 611                                 }
 612                                 if (*tmp) {
 613                                         com_err (program_name, 0,
 614                                                 _("bad interval - %s"), optarg);
 615                                         usage();
 616                                 }
 617                                 i_flag = 1;
 618                                 open_flag = EXT2_FLAG_RW;
 619                                 break;
 620                         case 'j':
 621                                 if (!journal_size)
 622                                         journal_size = -1;
 623                                 open_flag = EXT2_FLAG_RW;
 624                                 break;
 625                         case 'J':
 626                                 parse_journal_opts(optarg);
 627                                 open_flag = EXT2_FLAG_RW;
 628                                 break;
 629                         case 'l':
 630                                 l_flag = 1;
 631                                 break;
 632                         case 'L':
 633                                 new_label = optarg;
 634                                 L_flag = 1;
 635                                 open_flag = EXT2_FLAG_RW |
 636                                         EXT2_FLAG_JOURNAL_DEV_OK;
 637                                 break;
 638                         case 'm':
 639                                 reserved_ratio = strtod(optarg, &tmp);
 640                                 if (*tmp || reserved_ratio > 50) {
 641                                         com_err (program_name, 0,
 642                                                  _("bad reserved block ratio - %s"),
 643                                                  optarg);
 644                                         usage();
 645                                 }
 646                                 m_flag = 1;
 647                                 open_flag = EXT2_FLAG_RW;
 648                                 break;
 649                         case 'M':
 650                                 new_last_mounted = optarg;
 651                                 M_flag = 1;
 652                                 open_flag = EXT2_FLAG_RW;
 653                                 break;
 654                         case 'o':
 655                                 if (mntopts_cmd) {
 656                                         com_err (program_name, 0,
 657                                          _("-o may only be specified once"));
 658                                         usage();
 659                                 }
 660                                 mntopts_cmd = optarg;
 661                                 open_flag = EXT2_FLAG_RW;
 662                                 break;
 663
 664                         case 'O':
 665                                 if (features_cmd) {
 666                                         com_err (program_name, 0,
 667                                          _("-O may only be specified once"));
 668                                         usage();
 669                                 }
 670                                 features_cmd = optarg;
 671                                 open_flag = EXT2_FLAG_RW;
 672                                 break;
 673                         case 'r':
 674                                 reserved_blocks = strtoul (optarg, &tmp, 0);
 675                                 if (*tmp) {
 676                                         com_err (program_name, 0,
 677                                                  _("bad reserved blocks count - %s"),
 678                                                  optarg);
 679                                         usage();
 680                                 }
 681                                 r_flag = 1;
 682                                 open_flag = EXT2_FLAG_RW;
 683                                 break;
 684                         case 's':
 685                                 s_flag = atoi(optarg);
 686                                 open_flag = EXT2_FLAG_RW;
 687                                 break;
 688                         case 'T':
 689                                 T_flag = 1;
 690                                 last_check_time = parse_time(optarg);
 691                                 open_flag = EXT2_FLAG_RW;
 692                                 break;
 693                         case 'u':
 694                                 resuid = strtoul (optarg, &tmp, 0);
 695                                 if (*tmp) {
 696                                         pw = getpwnam (optarg);
 697                                         if (pw == NULL)
 698                                                 tmp = optarg;
 699                                         else {
 700                                                 resuid = pw->pw_uid;
 701                                                 *tmp = 0;
 702                                         }
 703                                 }
 704                                 if (*tmp) {
 705                                         com_err (program_name, 0,
 706                                                  _("bad uid/user name - %s"),
 707                                                  optarg);
 708                                         usage();
 709                                 }
 710                                 u_flag = 1;
 711                                 open_flag = EXT2_FLAG_RW;
 712                                 break;
 713                         case 'U':
 714                                 new_UUID = optarg;
 715                                 U_flag = 1;
 716                                 open_flag = EXT2_FLAG_RW |
 717                                         EXT2_FLAG_JOURNAL_DEV_OK;
 718                                 break;
 719                         default:
 720                                 usage();
 721                 }
 722         if (optind < argc - 1 || optind == argc)
 723                 usage();
 724         if (!open_flag && !l_flag)
 725                 usage();
 726         io_options = strchr(argv[optind], '?');
 727         if (io_options)
 728                 *io_options++ = 0;
 729         device_name = blkid_get_devname(NULL, argv[optind], NULL);
 730         if (!device_name) {
 731                 com_err("tune2fs", 0, _("Unable to resolve '%s'"),
 732                         argv[optind]);
 733                 exit(1);
 734         }
 735 }
 736
 737 void do_findfs(int argc, char **argv)
 738 {
 739         char    *dev;
 740
 741         if ((argc != 2) ||
 742             (strncmp(argv[1], "LABEL=", 6) && strncmp(argv[1], "UUID=", 5))) {
 743                 fprintf(stderr, "Usage: findfs LABEL=<label>|UUID=<uuid>\n");
 744                 exit(2);
 745         }
 746         dev = blkid_get_devname(NULL, argv[1], NULL);
 747         if (!dev) {
 748                 com_err("findfs", 0, _("Unable to resolve '%s'"),
 749                         argv[1]);
 750                 exit(1);
 751         }
 752         puts(dev);
 753         exit(0);
 754 }
 755
 756
 757 int main (int argc, char ** argv)
 758 {
 759         errcode_t retval;
 760         ext2_filsys fs;
 761         struct ext2_super_block *sb;
 762         io_manager io_ptr;
 763
 764 #ifdef ENABLE_NLS
 765         setlocale(LC_MESSAGES, "");
 766         setlocale(LC_CTYPE, "");
 767         bindtextdomain(NLS_CAT_NAME, LOCALEDIR);
 768         textdomain(NLS_CAT_NAME);
 769 #endif
 770         if (argc && *argv)
 771                 program_name = *argv;
 772         add_error_table(&et_ext2_error_table);
 773
 774         if (strcmp(get_progname(argv[0]), "findfs") == 0)
 775                 do_findfs(argc, argv);
 776         if (strcmp(get_progname(argv[0]), "e2label") == 0)
 777                 parse_e2label_options(argc, argv);
 778         else
 779                 parse_tune2fs_options(argc, argv);
 780
 781 #ifdef CONFIG_TESTIO_DEBUG
 782         io_ptr = test_io_manager;
 783         test_io_backing_manager = unix_io_manager;
 784 #else
 785         io_ptr = unix_io_manager;
 786 #endif
 787         retval = ext2fs_open2(device_name, io_options, open_flag,
 788                               0, 0, io_ptr, &fs);
 789         if (retval) {
 790                 com_err (program_name, retval, _("while trying to open %s"),
 791                          device_name);
 792                 fprintf(stderr,
 793                         _("Couldn't find valid filesystem superblock.\n"));
 794                 exit(1);
 795         }
 796         sb = fs->super;
 797         fs->flags &= ~EXT2_FLAG_MASTER_SB_ONLY;
 798         if (print_label) {
 799                 /* For e2label emulation */
 800                 printf("%.*s\n", (int) sizeof(sb->s_volume_name),
 801                        sb->s_volume_name);
 802                 remove_error_table(&et_ext2_error_table);
 803                 exit(0);
 804         }
 805         retval = ext2fs_check_if_mounted(device_name, &mount_flags);
 806         if (retval) {
 807                 com_err("ext2fs_check_if_mount", retval,
 808                         _("while determining whether %s is mounted."),
 809                         device_name);
 810                 exit(1);
 811         }
 812         /* Normally we only need to write out the superblock */
 813         fs->flags |= EXT2_FLAG_SUPER_ONLY;
 814
 815         if (c_flag) {
 816                 sb->s_max_mnt_count = max_mount_count;
 817                 ext2fs_mark_super_dirty(fs);
 818                 printf (_("Setting maximal mount count to %d\n"),
 819                         max_mount_count);
 820         }
 821         if (C_flag) {
 822                 sb->s_mnt_count = mount_count;
 823                 ext2fs_mark_super_dirty(fs);
 824                 printf (_("Setting current mount count to %d\n"), mount_count);
 825         }
 826         if (e_flag) {
 827                 sb->s_errors = errors;
 828                 ext2fs_mark_super_dirty(fs);
 829                 printf (_("Setting error behavior to %d\n"), errors);
 830         }
 831         if (g_flag) {
 832                 sb->s_def_resgid = resgid;
 833                 ext2fs_mark_super_dirty(fs);
 834                 printf (_("Setting reserved blocks gid to %lu\n"), resgid);
 835         }
 836         if (i_flag) {
 837                 sb->s_checkinterval = interval;
 838                 ext2fs_mark_super_dirty(fs);
 839                 printf (_("Setting interval between checks to %lu seconds\n"), interval);
 840         }
 841         if (m_flag) {
 842                 sb->s_r_blocks_count = e2p_percent(reserved_ratio,
 843                                                    sb->s_blocks_count);
 844                 ext2fs_mark_super_dirty(fs);
 845                 printf (_("Setting reserved blocks percentage to %g%% (%u blocks)\n"),
 846                         reserved_ratio, sb->s_r_blocks_count);
 847         }
 848         if (r_flag) {
 849                 if (reserved_blocks >= sb->s_blocks_count/2) {
 850                         com_err (program_name, 0,
 851                                  _("reserved blocks count is too big (%lu)"),
 852                                  reserved_blocks);
 853                         exit (1);
 854                 }
 855                 sb->s_r_blocks_count = reserved_blocks;
 856                 ext2fs_mark_super_dirty(fs);
 857                 printf (_("Setting reserved blocks count to %lu\n"),
 858                         reserved_blocks);
 859         }
 860         if (s_flag == 1) {
 861                 if (sb->s_feature_ro_compat &
 862                     EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER)
 863                         fputs(_("\nThe filesystem already has sparse "
 864                                 "superblocks.\n"), stderr);
 865                 else {
 866                         sb->s_feature_ro_compat |=
 867                                 EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER;
 868                         sb->s_state &= ~EXT2_VALID_FS;
 869                         ext2fs_mark_super_dirty(fs);
 870                         printf(_("\nSparse superblock flag set.  %s"),
 871                                _(please_fsck));
 872                 }
 873         }
 874         if (s_flag == 0) {
 875                 if (!(sb->s_feature_ro_compat &
 876                       EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER))
 877                         fputs(_("\nThe filesystem already has sparse "
 878                                 "superblocks disabled.\n"), stderr);
 879                 else {
 880                         sb->s_feature_ro_compat &=
 881                                 ~EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER;
 882                         sb->s_state &= ~EXT2_VALID_FS;
 883                         fs->flags |= EXT2_FLAG_MASTER_SB_ONLY;
 884                         ext2fs_mark_super_dirty(fs);
 885                         printf(_("\nSparse superblock flag cleared.  %s"),
 886                                _(please_fsck));
 887                 }
 888         }
 889         if (T_flag) {
 890                 sb->s_lastcheck = last_check_time;
 891                 ext2fs_mark_super_dirty(fs);
 892                 printf(_("Setting time filesystem last checked to %s\n"),
 893                        ctime(&last_check_time));
 894         }
 895         if (u_flag) {
 896                 sb->s_def_resuid = resuid;
 897                 ext2fs_mark_super_dirty(fs);
 898                 printf (_("Setting reserved blocks uid to %lu\n"), resuid);
 899         }
 900         if (L_flag) {
 901                 if (strlen(new_label) > sizeof(sb->s_volume_name))
 902                         fputs(_("Warning: label too long, truncating.\n"),
 903                               stderr);
 904                 memset(sb->s_volume_name, 0, sizeof(sb->s_volume_name));
 905                 strncpy(sb->s_volume_name, new_label,
 906                         sizeof(sb->s_volume_name));
 907                 ext2fs_mark_super_dirty(fs);
 908         }
 909         if (M_flag) {
 910                 memset(sb->s_last_mounted, 0, sizeof(sb->s_last_mounted));
 911                 strncpy(sb->s_last_mounted, new_last_mounted,
 912                         sizeof(sb->s_last_mounted));
 913                 ext2fs_mark_super_dirty(fs);
 914         }
 915         if (mntopts_cmd)
 916                 update_mntopts(fs, mntopts_cmd);
 917         if (features_cmd)
 918                 update_feature_set(fs, features_cmd);
 919         if (journal_size || journal_device)
 920                 add_journal(fs);
 921
 922         if (U_flag) {
 923                 if ((strcasecmp(new_UUID, "null") == 0) ||
 924                     (strcasecmp(new_UUID, "clear") == 0)) {
 925                         uuid_clear(sb->s_uuid);
 926                 } else if (strcasecmp(new_UUID, "time") == 0) {
 927                         uuid_generate_time(sb->s_uuid);
 928                 } else if (strcasecmp(new_UUID, "random") == 0) {
 929                         uuid_generate(sb->s_uuid);
 930                 } else if (uuid_parse(new_UUID, sb->s_uuid)) {
 931                         com_err(program_name, 0, _("Invalid UUID format\n"));
 932                         exit(1);
 933                 }
 934                 ext2fs_mark_super_dirty(fs);
 935         }
 936
 937         if (l_flag)
 938                 list_super (sb);
 939         remove_error_table(&et_ext2_error_table);
 940         return (ext2fs_close (fs) ? 1 : 0);
 941 }