misc/tune2fs.c

   1 /*
   2  * tune2fs.c            - Change the file system parameters on
   3  *                        an unmounted second extended file system
   4  *
   5  * Copyright (C) 1992, 1993, 1994  Remy Card <card@masi.ibp.fr>
   6  *                                 Laboratoire MASI, Institut Blaise Pascal
   7  *                                 Universite Pierre et Marie Curie (Paris VI)
   8  *
   9  * Copyright 1995, 1996, 1997 by Theodore Ts'o.
  10  *
  11  * %Begin-Header%
  12  * This file may be redistributed under the terms of the GNU Public
  13  * License.
  14  * %End-Header%
  15  */
  16
  17 /*
  18  * History:
  19  * 93/06/01     - Creation
  20  * 93/10/31     - Added the -c option to change the maximal mount counts
  21  * 93/12/14     - Added -l flag to list contents of superblock
  22  *                M.J.E. Mol (marcel@duteca.et.tudelft.nl)
  23  *                F.W. ten Wolde (franky@duteca.et.tudelft.nl)
  24  * 93/12/29     - Added the -e option to change errors behavior
  25  * 94/02/27     - Ported to use the ext2fs library
  26  * 94/03/06     - Added the checks interval from Uwe Ohse (uwe@tirka.gun.de)
  27  */
  28
  29 #include <fcntl.h>
  30 #include <grp.h>
  31 #ifdef HAVE_GETOPT_H
  32 #include <getopt.h>
  33 #else
  34 extern char *optarg;
  35 extern int optind;
  36 #endif
  37 #include <pwd.h>
  38 #include <stdio.h>
  39 #include <stdlib.h>
  40 #include <string.h>
  41 #include <time.h>
  42 #include <unistd.h>
  43 #include <sys/types.h>
  44
  45 #include <linux/ext2_fs.h>
  46
  47 #include "ext2fs/ext2fs.h"
  48 #include "et/com_err.h"
  49 #include "uuid/uuid.h"
  50 #include "e2p/e2p.h"
  51
  52 #include "../version.h"
  53 #include "nls-enable.h"
  54
  55 const char * program_name = "tune2fs";
  56 char * device_name = NULL;
  57 char * new_label = NULL;
  58 char * new_last_mounted = NULL;
  59 char * new_UUID = NULL;
  60 int c_flag = 0;
  61 int C_flag = 0;
  62 int e_flag = 0;
  63 int g_flag = 0;
  64 int i_flag = 0;
  65 int l_flag = 0;
  66 int L_flag = 0;
  67 int m_flag = 0;
  68 int M_flag = 0;
  69 int r_flag = 0;
  70 int s_flag = -1;
  71 int u_flag = 0;
  72 int U_flag = 0;
  73 int max_mount_count, mount_count;
  74 unsigned long interval;
  75 unsigned long reserved_ratio = 0;
  76 unsigned long reserved_blocks = 0;
  77 unsigned short errors;
  78 unsigned long resgid = 0;
  79 unsigned long resuid = 0;
  80
  81 #ifndef HAVE_STRCASECMP
  82 static int strcasecmp (char *s1, char *s2)
  83 {
  84         while (*s1 && *s2) {
  85                 int ch1 = *s1++, ch2 = *s2++;
  86                 if (isupper (ch1))
  87                         ch1 = tolower (ch1);
  88                 if (isupper (ch2))
  89                         ch2 = tolower (ch2);
  90                 if (ch1 != ch2)
  91                         return ch1 - ch2;
  92         }
  93         return *s1 ? 1 : *s2 ? -1 : 0;
  94 }
  95 #endif
  96
  97 static void usage(void)
  98 {
  99         fprintf(stderr, _("Usage: %s [-c max-mounts-count] [-e errors-behavior] "
 100                  "[-g group]\n"
 101                  "\t[-i interval[d|m|w]] [-l] [-s sparse-flag] "
 102                 "[-m reserved-blocks-percent]\n"
 103                  "\t[-r reserved-blocks-count] [-u user] [-C mount-count]\n"
 104                  "\t[-L volume-label] [-M last-mounted-dir] [-U UUID]\n"
 105                  "\t[-O [^]feature[,...]] device\n"), program_name);
 106         exit (1);
 107 }
 108
 109 static __u32 ok_features[3] = {
 110         0,                                      /* Compat */
 111         EXT2_FEATURE_INCOMPAT_FILETYPE,         /* Incompat */
 112         EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER     /* R/O compat */
 113 };
 114
 115 static const char *please_fsck = N_("Please run e2fsck on the filesystem.\n");
 116
 117 int main (int argc, char ** argv)
 118 {
 119         int c;
 120         char * tmp;
 121         errcode_t retval;
 122         ext2_filsys fs;
 123         struct ext2fs_sb *sb;
 124         struct group * gr;
 125         struct passwd * pw;
 126         int open_flag = 0;
 127         char *features_cmd = 0;
 128
 129 #ifdef ENABLE_NLS
 130         setlocale(LC_MESSAGES, "");
 131         bindtextdomain(NLS_CAT_NAME, LOCALEDIR);
 132         textdomain(NLS_CAT_NAME);
 133 #endif
 134         fprintf (stderr, _("tune2fs %s, %s for EXT2 FS %s, %s\n"),
 135                  E2FSPROGS_VERSION, E2FSPROGS_DATE,
 136                  EXT2FS_VERSION, EXT2FS_DATE);
 137         if (argc && *argv)
 138                 program_name = *argv;
 139         initialize_ext2_error_table();
 140         while ((c = getopt (argc, argv, "c:e:g:i:lm:r:s:u:C:L:M:O:U:")) != EOF)
 141                 switch (c)
 142                 {
 143                         case 'c':
 144                                 max_mount_count = strtol (optarg, &tmp, 0);
 145                                 if (*tmp || max_mount_count > 16000) {
 146                                         com_err (program_name, 0,
 147                                                  _("bad mounts count - %s"),
 148                                                  optarg);
 149                                         usage();
 150                                 }
 151                                 c_flag = 1;
 152                                 open_flag = EXT2_FLAG_RW;
 153                                 break;
 154                         case 'C':
 155                                 mount_count = strtoul (optarg, &tmp, 0);
 156                                 if (*tmp || mount_count > 16000) {
 157                                         com_err (program_name, 0,
 158                                                  _("bad mounts count - %s"),
 159                                                  optarg);
 160                                         usage();
 161                                 }
 162                                 C_flag = 1;
 163                                 open_flag = EXT2_FLAG_RW;
 164                                 break;
 165                         case 'e':
 166                                 if (strcmp (optarg, "continue") == 0)
 167                                         errors = EXT2_ERRORS_CONTINUE;
 168                                 else if (strcmp (optarg, "remount-ro") == 0)
 169                                         errors = EXT2_ERRORS_RO;
 170                                 else if (strcmp (optarg, "panic") == 0)
 171                                         errors = EXT2_ERRORS_PANIC;
 172                                 else {
 173                                         com_err (program_name, 0,
 174                                                  _("bad error behavior - %s"),
 175                                                  optarg);
 176                                         usage();
 177                                 }
 178                                 e_flag = 1;
 179                                 open_flag = EXT2_FLAG_RW;
 180                                 break;
 181                         case 'g':
 182                                 resgid = strtoul (optarg, &tmp, 0);
 183                                 if (*tmp) {
 184                                         gr = getgrnam (optarg);
 185                                         if (gr == NULL)
 186                                                 tmp = optarg;
 187                                         else {
 188                                                 resgid = gr->gr_gid;
 189                                                 *tmp =0;
 190                                         }
 191                                 }
 192                                 if (*tmp) {
 193                                         com_err (program_name, 0,
 194                                                  _("bad gid/group name - %s"),
 195                                                  optarg);
 196                                         usage();
 197                                 }
 198                                 g_flag = 1;
 199                                 open_flag = EXT2_FLAG_RW;
 200                                 break;
 201                         case 'i':
 202                                 interval = strtoul (optarg, &tmp, 0);
 203                                 switch (*tmp) {
 204                                 case 's':
 205                                         tmp++;
 206                                         break;
 207                                 case '\0':
 208                                 case 'd':
 209                                 case 'D': /* days */
 210                                         interval *= 86400;
 211                                         if (*tmp != '\0')
 212                                                 tmp++;
 213                                         break;
 214                                 case 'm':
 215                                 case 'M': /* months! */
 216                                         interval *= 86400 * 30;
 217                                         tmp++;
 218                                         break;
 219                                 case 'w':
 220                                 case 'W': /* weeks */
 221                                         interval *= 86400 * 7;
 222                                         tmp++;
 223                                         break;
 224                                 }
 225                                 if (*tmp || interval > (365 * 86400)) {
 226                                         com_err (program_name, 0,
 227                                                 _("bad interval - %s"), optarg);
 228                                         usage();
 229                                 }
 230                                 i_flag = 1;
 231                                 open_flag = EXT2_FLAG_RW;
 232                                 break;
 233                         case 'l':
 234                                 l_flag = 1;
 235                                 break;
 236                         case 'L':
 237                                 new_label = optarg;
 238                                 L_flag = 1;
 239                                 open_flag = EXT2_FLAG_RW;
 240                                 break;
 241                         case 'm':
 242                                 reserved_ratio = strtoul (optarg, &tmp, 0);
 243                                 if (*tmp || reserved_ratio > 50) {
 244                                         com_err (program_name, 0,
 245                                                  _("bad reserved block ratio - %s"),
 246                                                  optarg);
 247                                         usage();
 248                                 }
 249                                 m_flag = 1;
 250                                 open_flag = EXT2_FLAG_RW;
 251                                 break;
 252                         case 'M':
 253                                 new_last_mounted = optarg;
 254                                 M_flag = 1;
 255                                 open_flag = EXT2_FLAG_RW;
 256                                 break;
 257                         case 'O':
 258                                 features_cmd = optarg;
 259                                 open_flag = EXT2_FLAG_RW;
 260                                 break;
 261                         case 'r':
 262                                 reserved_blocks = strtoul (optarg, &tmp, 0);
 263                                 if (*tmp) {
 264                                         com_err (program_name, 0,
 265                                                  _("bad reserved blocks count - %s"),
 266                                                  optarg);
 267                                         usage();
 268                                 }
 269                                 r_flag = 1;
 270                                 open_flag = EXT2_FLAG_RW;
 271                                 break;
 272                         case 's':
 273                                 s_flag = atoi(optarg);
 274                                 open_flag = EXT2_FLAG_RW;
 275                                 break;
 276                         case 'u':
 277                                 resuid = strtoul (optarg, &tmp, 0);
 278                                 if (*tmp) {
 279                                         pw = getpwnam (optarg);
 280                                         if (pw == NULL)
 281                                                 tmp = optarg;
 282                                         else {
 283                                                 resuid = pw->pw_uid;
 284                                                 *tmp = 0;
 285                                         }
 286                                 }
 287                                 if (*tmp) {
 288                                         com_err (program_name, 0,
 289                                                  _("bad uid/user name - %s"),
 290                                                  optarg);
 291                                         usage();
 292                                 }
 293                                 u_flag = 1;
 294                                 open_flag = EXT2_FLAG_RW;
 295                                 break;
 296                         case 'U':
 297                                 new_UUID = optarg;
 298                                 U_flag = 1;
 299                                 open_flag = EXT2_FLAG_RW;
 300                                 break;
 301                         default:
 302                                 usage();
 303                 }
 304         if (optind < argc - 1 || optind == argc)
 305                 usage();
 306         if (!open_flag && !l_flag)
 307                 usage();
 308         device_name = argv[optind];
 309         retval = ext2fs_open (device_name, open_flag, 0, 0,
 310                               unix_io_manager, &fs);
 311         if (retval) {
 312                 com_err (program_name, retval, _("while trying to open %s"),
 313                          device_name);
 314                 printf(_("Couldn't find valid filesystem superblock.\n"));
 315                 exit(1);
 316         }
 317         sb = (struct ext2fs_sb *) fs->super;
 318
 319         if (c_flag) {
 320                 fs->super->s_max_mnt_count = max_mount_count;
 321                 ext2fs_mark_super_dirty(fs);
 322                 printf (_("Setting maximal mount count to %d\n"),
 323                         max_mount_count);
 324         }
 325         if (C_flag) {
 326                 fs->super->s_mnt_count = mount_count;
 327                 ext2fs_mark_super_dirty(fs);
 328                 printf (_("Setting current mount count to %d\n"), mount_count);
 329         }
 330         if (e_flag) {
 331                 fs->super->s_errors = errors;
 332                 ext2fs_mark_super_dirty(fs);
 333                 printf (_("Setting error behavior to %d\n"), errors);
 334         }
 335         if (g_flag)
 336 #ifdef  EXT2_DEF_RESGID
 337         {
 338                 fs->super->s_def_resgid = resgid;
 339                 ext2fs_mark_super_dirty(fs);
 340                 printf (_("Setting reserved blocks gid to %lu\n"), resgid);
 341         }
 342 #else
 343                 com_err (program_name, 0,
 344                          _("The -g option is not supported by this version -- "
 345                          "Recompile with a newer kernel"));
 346 #endif
 347         if (i_flag) {
 348                 fs->super->s_checkinterval = interval;
 349                 ext2fs_mark_super_dirty(fs);
 350                 printf (_("Setting interval between check %lu seconds\n"), interval);
 351         }
 352         if (m_flag) {
 353                 fs->super->s_r_blocks_count = (fs->super->s_blocks_count / 100)
 354                         * reserved_ratio;
 355                 ext2fs_mark_super_dirty(fs);
 356                 printf (_("Setting reserved blocks percentage to %lu (%u blocks)\n"),
 357                         reserved_ratio, fs->super->s_r_blocks_count);
 358         }
 359         if (r_flag) {
 360                 if (reserved_blocks >= fs->super->s_blocks_count) {
 361                         com_err (program_name, 0,
 362                                  _("reserved blocks count is too big (%ul)"),
 363                                  reserved_blocks);
 364                         exit (1);
 365                 }
 366                 fs->super->s_r_blocks_count = reserved_blocks;
 367                 ext2fs_mark_super_dirty(fs);
 368                 printf (_("Setting reserved blocks count to %lu\n"),
 369                         reserved_blocks);
 370         }
 371         if (s_flag == 1) {
 372 #ifdef EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER
 373                 if (sb->s_feature_ro_compat &
 374                     EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER)
 375                         fprintf(stderr, _("\nThe filesystem already"
 376                                 " has sparse superblocks.\n"));
 377                 else {
 378                         sb->s_feature_ro_compat |=
 379                                 EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER;
 380                         fs->super->s_state &= ~EXT2_VALID_FS;
 381                         ext2fs_mark_super_dirty(fs);
 382                         printf(_("\nSparse superblock flag set.  %s"),
 383                                _(please_fsck));
 384                 }
 385 #else /* !EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER */
 386                 com_err (program_name, 0,
 387                          _("The -s option is not supported by this version -- "
 388                          "Recompile with a newer kernel"));
 389 #endif /* EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER */
 390         }
 391         if (s_flag == 0) {
 392 #ifdef EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER
 393                 if (!(sb->s_feature_ro_compat &
 394                       EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER))
 395                         fprintf(stderr, _("\nThe filesystem already"
 396                                 " has sparse superblocks disabled.\n"));
 397                 else {
 398                         sb->s_feature_ro_compat &=
 399                                 ~EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER;
 400                         fs->super->s_state &= ~EXT2_VALID_FS;
 401                         fs->flags |= EXT2_FLAG_MASTER_SB_ONLY;
 402                         ext2fs_mark_super_dirty(fs);
 403                         printf(_("\nSparse superblock flag cleared.  %s"),
 404                                _(please_fsck));
 405                 }
 406 #else /* !EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER */
 407                 com_err (program_name, 0,
 408                          _("The -s option is not supported by this version -- "
 409                          "Recompile with a newer kernel"));
 410 #endif /* EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER */
 411         }
 412
 413         if (u_flag)
 414 #ifdef  EXT2_DEF_RESUID
 415         {
 416                 fs->super->s_def_resuid = resuid;
 417                 ext2fs_mark_super_dirty(fs);
 418                 printf (_("Setting reserved blocks uid to %lu\n"), resuid);
 419         }
 420 #else
 421                 com_err (program_name, 0,
 422                          _("The -u option is not supported by this version -- "
 423                          "Recompile with a newer kernel"));
 424 #endif
 425         if (L_flag) {
 426                 if (strlen(new_label) > sizeof(sb->s_volume_name))
 427                         fprintf(stderr, _("Warning: label too "
 428                                 "long, truncating.\n"));
 429                 memset(sb->s_volume_name, 0, sizeof(sb->s_volume_name));
 430                 strncpy(sb->s_volume_name, new_label,
 431                         sizeof(sb->s_volume_name));
 432                 ext2fs_mark_super_dirty(fs);
 433         }
 434         if (M_flag) {
 435                 memset(sb->s_last_mounted, 0, sizeof(sb->s_last_mounted));
 436                 strncpy(sb->s_last_mounted, new_last_mounted,
 437                         sizeof(sb->s_last_mounted));
 438                 ext2fs_mark_super_dirty(fs);
 439         }
 440         if (features_cmd) {
 441                 int sparse, old_sparse, filetype, old_filetype;
 442
 443                 old_sparse = sb->s_feature_ro_compat &
 444                         EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER;
 445                 old_filetype = sb->s_feature_incompat &
 446                         EXT2_FEATURE_INCOMPAT_FILETYPE;
 447                 if (e2p_edit_feature(features_cmd,
 448                                      &sb->s_feature_compat,
 449                                      ok_features)) {
 450                         fprintf(stderr, _("Invalid filesystem option set: %s\n"),
 451                                 features_cmd);
 452                         exit(1);
 453                 }
 454                 sparse = sb->s_feature_ro_compat &
 455                         EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER;
 456                 filetype = sb->s_feature_incompat &
 457                         EXT2_FEATURE_INCOMPAT_FILETYPE;
 458                 if ((sparse != old_sparse) ||
 459                     (filetype != old_filetype)) {
 460                         fs->super->s_state &= ~EXT2_VALID_FS;
 461                         printf("\n%s\n", _(please_fsck));
 462                 }
 463                 ext2fs_mark_super_dirty(fs);
 464         }
 465         if (U_flag) {
 466                 if (strcasecmp(new_UUID, "null") == 0) {
 467                         uuid_clear(sb->s_uuid);
 468                 } else if (strcasecmp(new_UUID, "random") == 0) {
 469                         uuid_generate(sb->s_uuid);
 470                 } else if (uuid_parse(new_UUID, sb->s_uuid)) {
 471                         com_err(program_name, 0, _("Invalid UUID format\n"));
 472                         exit(1);
 473                 }
 474                 ext2fs_mark_super_dirty(fs);
 475         }
 476
 477         if (l_flag)
 478                 list_super (fs->super);
 479         ext2fs_close (fs);
 480         exit (0);
 481 }