debugfs/debugfs.c

   1 /*
   2  * debugfs.c --- a program which allows you to attach an ext2fs
   3  * filesystem and play with it.
   4  *
   5  * Copyright (C) 1993 Theodore Ts'o.  This file may be redistributed
   6  * under the terms of the GNU Public License.
   7  *
   8  * Modifications by Robert Sanders <gt8134b@prism.gatech.edu>
   9  */
  10
  11 #include <stdio.h>
  12 #include <unistd.h>
  13 #include <stdlib.h>
  14 #include <ctype.h>
  15 #include <string.h>
  16 #include <time.h>
  17 #ifdef HAVE_GETOPT_H
  18 #include <getopt.h>
  19 #else
  20 extern int optind;
  21 extern char *optarg;
  22 #endif
  23 #ifdef HAVE_OPTRESET
  24 extern int optreset;            /* defined by BSD, but not others */
  25 #endif
  26 #ifdef HAVE_ERRNO_H
  27 #include <errno.h>
  28 #endif
  29 #include <fcntl.h>
  30 #include <sys/types.h>
  31 #include <sys/stat.h>
  32
  33 #include "et/com_err.h"
  34 #include "ss/ss.h"
  35 #include "debugfs.h"
  36 #include "uuid/uuid.h"
  37 #include "e2p/e2p.h"
  38
  39 #include "../version.h"
  40
  41 extern ss_request_table debug_cmds;
  42
  43 ext2_filsys current_fs = NULL;
  44 ino_t   root, cwd;
  45
  46 static void open_filesystem(char *device, int open_flags, blk_t superblock,
  47                             blk_t blocksize, int catastrophic)
  48 {
  49         int     retval;
  50
  51         if (superblock != 0 && blocksize == 0) {
  52                 com_err(device, 0, "if you specify the superblock, you must also specify the block size");
  53                 current_fs = NULL;
  54                 return;
  55         }
  56
  57         if (catastrophic && (open_flags & EXT2_FLAG_RW)) {
  58                 com_err(device, 0,
  59                         "opening read-only because of catastrophic mode");
  60                 open_flags &= ~EXT2_FLAG_RW;
  61         }
  62
  63         retval = ext2fs_open(device, open_flags, superblock, blocksize,
  64                              unix_io_manager, &current_fs);
  65         if (retval) {
  66                 com_err(device, retval, "while opening filesystem");
  67                 current_fs = NULL;
  68                 return;
  69         }
  70
  71         if (catastrophic)
  72                 com_err(device, 0, "catastrophic mode - not reading inode or group bitmaps");
  73         else {
  74                 retval = ext2fs_read_inode_bitmap(current_fs);
  75                 if (retval) {
  76                         com_err(device, retval, "while reading inode bitmap");
  77                         goto errout;
  78                 }
  79                 retval = ext2fs_read_block_bitmap(current_fs);
  80                 if (retval) {
  81                         com_err(device, retval, "while reading block bitmap");
  82                         goto errout;
  83                 }
  84         }
  85         root = cwd = EXT2_ROOT_INO;
  86         return;
  87
  88 errout:
  89         retval = ext2fs_close(current_fs);
  90         if (retval)
  91                 com_err(device, retval, "while trying to close filesystem");
  92         current_fs = NULL;
  93 }
  94
  95 void do_open_filesys(int argc, char **argv)
  96 {
  97         const char *usage = "Usage: open [-s superblock] [-b blocksize] [-c] [-w] <device>";
  98         int     c;
  99         int     catastrophic = 0;
 100         blk_t   superblock = 0;
 101         blk_t   blocksize = 0;
 102         char    *tmp;
 103         int open_flags = 0;
 104
 105         optind = 0;
 106 #ifdef HAVE_OPTRESET
 107         optreset = 1;           /* Makes BSD getopt happy */
 108 #endif
 109         while ((c = getopt (argc, argv, "wfcb:s:")) != EOF) {
 110                 switch (c) {
 111                 case 'w':
 112                         open_flags |= EXT2_FLAG_RW;
 113                         break;
 114                 case 'f':
 115                         open_flags |= EXT2_FLAG_FORCE;
 116                         break;
 117                 case 'c':
 118                         catastrophic = 1;
 119                         break;
 120                 case 'b':
 121                         blocksize = strtoul(optarg, &tmp, 0);
 122                         if (*tmp) {
 123                                 com_err(argv[0], 0,
 124                                         "Bad block size - %s", optarg);
 125                                 return;
 126                         }
 127                         break;
 128                 case 's':
 129                         superblock = strtoul(optarg, &tmp, 0);
 130                         if (*tmp) {
 131                                 com_err(argv[0], 0,
 132                                         "Bad superblock number - %s", optarg);
 133                                 return;
 134                         }
 135                         break;
 136                 default:
 137                         com_err(argv[0], 0, usage);
 138                         return;
 139                 }
 140         }
 141         if (optind != argc-1) {
 142                 com_err(argv[0], 0, usage);
 143                 return;
 144         }
 145         if (check_fs_not_open(argv[0]))
 146                 return;
 147         open_filesystem(argv[optind], open_flags,
 148                         superblock, blocksize, catastrophic);
 149 }
 150
 151 void do_lcd(int argc, char **argv)
 152 {
 153         const char *usage = "Usage: lcd <native dir>";
 154
 155         if (argc != 2) {
 156                 com_err(argv[0], 0, usage);
 157                 return;
 158         }
 159
 160         if (chdir(argv[1]) == -1) {
 161                 com_err(argv[0], errno,
 162                         "while trying to change native directory to %s",
 163                         argv[1]);
 164                 return;
 165         }
 166 }
 167
 168 static void close_filesystem(NOARGS)
 169 {
 170         int     retval;
 171
 172         if (current_fs->flags & EXT2_FLAG_IB_DIRTY) {
 173                 retval = ext2fs_write_inode_bitmap(current_fs);
 174                 if (retval)
 175                         com_err("ext2fs_write_inode_bitmap", retval, "");
 176         }
 177         if (current_fs->flags & EXT2_FLAG_BB_DIRTY) {
 178                 retval = ext2fs_write_block_bitmap(current_fs);
 179                 if (retval)
 180                         com_err("ext2fs_write_block_bitmap", retval, "");
 181         }
 182         retval = ext2fs_close(current_fs);
 183         if (retval)
 184                 com_err("ext2fs_close", retval, "");
 185         current_fs = NULL;
 186         return;
 187 }
 188
 189 void do_close_filesys(int argc, char **argv)
 190 {
 191         if (argc > 1) {
 192                 com_err(argv[0], 0, "Usage: close_filesys");
 193                 return;
 194         }
 195         if (check_fs_open(argv[0]))
 196                 return;
 197         close_filesystem();
 198 }
 199
 200 void do_init_filesys(int argc, char **argv)
 201 {
 202         const char      *usage = "Usage: initialize <device> <blocksize>";
 203         struct ext2_super_block param;
 204         errcode_t       retval;
 205         char            *tmp;
 206
 207         if (argc != 3) {
 208                 com_err(argv[0], 0, usage);
 209                 return;
 210         }
 211         if (check_fs_not_open(argv[0]))
 212                 return;
 213
 214         memset(&param, 0, sizeof(struct ext2_super_block));
 215         param.s_blocks_count = strtoul(argv[2], &tmp, 0);
 216         if (*tmp) {
 217                 com_err(argv[0], 0, "Bad blocks count - %s", argv[2]);
 218                 return;
 219         }
 220         retval = ext2fs_initialize(argv[1], 0, &param,
 221                                    unix_io_manager, &current_fs);
 222         if (retval) {
 223                 com_err(argv[1], retval, "while initializing filesystem");
 224                 current_fs = NULL;
 225                 return;
 226         }
 227         root = cwd = EXT2_ROOT_INO;
 228         return;
 229 }
 230
 231 static void print_features(struct ext2fs_sb * s, FILE *f)
 232 {
 233 #ifdef EXT2_DYNAMIC_REV
 234         int     i, j, printed=0;
 235 __u32   *mask = &s->s_feature_compat, m;
 236
 237         printf ("Filesystem features:");
 238         for (i=0; i <3; i++,mask++) {
 239                 for (j=0,m=1; j < 32; j++, m<<=1) {
 240                         if (*mask & m) {
 241                                 fprintf(f, " %s", e2p_feature2string(i, m));
 242                                 printed++;
 243                         }
 244                 }
 245         }
 246         if (printed == 0)
 247                 printf("(none)");
 248         printf("\n");
 249 #endif
 250 }
 251
 252 void do_show_super_stats(int argc, char *argv[])
 253 {
 254         int     i;
 255         FILE    *out;
 256         struct ext2fs_sb *sb;
 257         struct ext2_group_desc *gdp;
 258         int     c, header_only = 0;
 259         char buf[80];
 260         const char *none = "(none)";
 261         const char *usage = "Usage: show_super [-h]";
 262
 263         optind = 0;
 264 #ifdef HAVE_OPTRESET
 265         optreset = 1;           /* Makes BSD getopt happy */
 266 #endif
 267         while ((c = getopt (argc, argv, "h")) != EOF) {
 268                 switch (c) {
 269                 case 'h':
 270                         header_only++;
 271                         break;
 272                 default:
 273                         com_err(argv[0], 0, usage);
 274                         return;
 275                 }
 276         }
 277         if (optind != argc) {
 278                 com_err(argv[0], 0, usage);
 279                 return;
 280         }
 281         if (check_fs_open(argv[0]))
 282                 return;
 283         out = open_pager();
 284         sb = (struct ext2fs_sb *) current_fs->super;
 285         fprintf(out, "Filesystem is read-%s\n",
 286                 current_fs->flags & EXT2_FLAG_RW ? "write" : "only");
 287         if (sb->s_volume_name[0]) {
 288                 memset(buf, 0, sizeof(buf));
 289                 strncpy(buf, sb->s_volume_name, sizeof(sb->s_volume_name));
 290         } else
 291                 strcpy(buf, none);
 292         fprintf(out, "Volume name = %s\n", buf);
 293         if (sb->s_last_mounted[0]) {
 294                 memset(buf, 0, sizeof(buf));
 295                 strncpy(buf, sb->s_last_mounted, sizeof(sb->s_last_mounted));
 296         } else
 297                 strcpy(buf, none);
 298         fprintf(out, "Last mounted directory = %s\n", buf);
 299         if (!uuid_is_null(sb->s_uuid))
 300                 uuid_unparse(sb->s_uuid, buf);
 301         else
 302                 strcpy(buf, none);
 303         fprintf(out, "Filesystem UUID = %s\n", buf);
 304         print_features(sb, out);
 305         fprintf(out, "Last mount time = %s", time_to_string(sb->s_mtime));
 306         fprintf(out, "Last write time = %s", time_to_string(sb->s_wtime));
 307         fprintf(out, "Mount counts = %d (maximal = %d)\n",
 308                 sb->s_mnt_count, sb->s_max_mnt_count);
 309         fputs ("Filesystem OS type = ", out);
 310         switch (sb->s_creator_os) {
 311             case EXT2_OS_LINUX: fputs ("Linux\n", out); break;
 312             case EXT2_OS_HURD:  fputs ("GNU\n", out); break;
 313             case EXT2_OS_MASIX: fputs ("Masix\n", out); break;
 314             default:            fputs ("unknown\n", out);
 315         }
 316         fprintf(out, "Superblock size = %d\n",
 317                 sizeof(struct ext2_super_block));
 318         fprintf(out, "Block size = %d, fragment size = %d\n",
 319                 EXT2_BLOCK_SIZE(sb), EXT2_FRAG_SIZE(sb));
 320         fprintf(out, "Inode size = %d\n", EXT2_INODE_SIZE(sb));
 321         fprintf(out, "%d inodes, %d free\n", sb->s_inodes_count,
 322                 sb->s_free_inodes_count);
 323         fprintf(out, "%d blocks, %d free, %d reserved, first block = %d\n",
 324                 sb->s_blocks_count, sb->s_free_blocks_count,
 325                 sb->s_r_blocks_count, sb->s_first_data_block);
 326         fprintf(out, "%d blocks per group\n", sb->s_blocks_per_group);
 327         fprintf(out, "%d fragments per group\n", sb->s_frags_per_group);
 328         fprintf(out, "%d inodes per group\n", EXT2_INODES_PER_GROUP(sb));
 329         fprintf(out, "%ld group%s (%ld descriptors block%s)\n",
 330                 current_fs->group_desc_count,
 331                 (current_fs->group_desc_count != 1) ? "s" : "",
 332                 current_fs->desc_blocks,
 333                 (current_fs->desc_blocks != 1) ? "s" : "");
 334
 335         if (header_only) {
 336                 close_pager(out);
 337                 return;
 338         }
 339
 340         gdp = &current_fs->group_desc[0];
 341         for (i = 0; i < current_fs->group_desc_count; i++, gdp++)
 342                 fprintf(out, " Group %2d: block bitmap at %d, "
 343                         "inode bitmap at %d, "
 344                         "inode table at %d\n"
 345                         "           %d free block%s, "
 346                         "%d free inode%s, "
 347                         "%d used director%s\n",
 348                         i, gdp->bg_block_bitmap,
 349                         gdp->bg_inode_bitmap, gdp->bg_inode_table,
 350                         gdp->bg_free_blocks_count,
 351                         gdp->bg_free_blocks_count != 1 ? "s" : "",
 352                         gdp->bg_free_inodes_count,
 353                         gdp->bg_free_inodes_count != 1 ? "s" : "",
 354                         gdp->bg_used_dirs_count,
 355                         gdp->bg_used_dirs_count != 1 ? "ies" : "y");
 356         close_pager(out);
 357 }
 358
 359 void do_dirty_filesys(int argc, char **argv)
 360 {
 361         if (check_fs_open(argv[0]))
 362                 return;
 363         if (check_fs_read_write(argv[0]))
 364                 return;
 365
 366         if (argv[1] && !strcmp(argv[1], "-clean"))
 367                 current_fs->super->s_state |= EXT2_VALID_FS;
 368         else
 369                 current_fs->super->s_state &= ~EXT2_VALID_FS;
 370         ext2fs_mark_super_dirty(current_fs);
 371 }
 372
 373 struct list_blocks_struct {
 374         FILE    *f;
 375         int     total;
 376 };
 377
 378 static int list_blocks_proc(ext2_filsys fs, blk_t *blocknr, int blockcnt,
 379                             void *private)
 380 {
 381         struct list_blocks_struct *lb = (struct list_blocks_struct *) private;
 382
 383         fprintf(lb->f, "%d ", *blocknr);
 384         lb->total++;
 385         return 0;
 386 }
 387
 388
 389 static void dump_blocks(FILE *f, ino_t inode)
 390 {
 391         struct list_blocks_struct lb;
 392
 393         fprintf(f, "BLOCKS:\n");
 394         lb.total = 0;
 395         lb.f = f;
 396         ext2fs_block_iterate(current_fs, inode, 0, NULL,
 397                              list_blocks_proc, (void *)&lb);
 398         if (lb.total)
 399                 fprintf(f, "\nTOTAL: %d\n", lb.total);
 400         fprintf(f,"\n");
 401 }
 402
 403
 404 static void dump_inode(ino_t inode_num, struct ext2_inode inode)
 405 {
 406         const char *i_type;
 407         FILE    *out;
 408         char frag, fsize;
 409         int os = current_fs->super->s_creator_os;
 410
 411         out = open_pager();
 412         if (LINUX_S_ISDIR(inode.i_mode)) i_type = "directory";
 413         else if (LINUX_S_ISREG(inode.i_mode)) i_type = "regular";
 414         else if (LINUX_S_ISLNK(inode.i_mode)) i_type = "symlink";
 415         else if (LINUX_S_ISBLK(inode.i_mode)) i_type = "block special";
 416         else if (LINUX_S_ISCHR(inode.i_mode)) i_type = "character special";
 417         else if (LINUX_S_ISFIFO(inode.i_mode)) i_type = "FIFO";
 418         else if (LINUX_S_ISSOCK(inode.i_mode)) i_type = "socket";
 419         else i_type = "bad type";
 420         fprintf(out, "Inode: %ld   Type: %s    ", inode_num, i_type);
 421         fprintf(out, "Mode:  %04o   Flags: 0x%x   Generation: %d\n",
 422                 inode.i_mode & 0777, inode.i_flags, inode.i_generation);
 423         fprintf(out, "User: %5d   Group: %5d   Size: ",
 424                 inode.i_uid, inode.i_gid);
 425         if (LINUX_S_ISDIR(inode.i_mode))
 426                 fprintf(out, "%d\n", inode.i_size);
 427         else {
 428                 __u64 i_size = (inode.i_size |
 429                                 ((unsigned long long)inode.i_size_high << 32));
 430
 431                 fprintf(out, "%lld\n", i_size);
 432         }
 433         if (current_fs->super->s_creator_os == EXT2_OS_HURD)
 434                 fprintf(out,
 435                         "File ACL: %d    Directory ACL: %d Translator: %d\n",
 436                         inode.i_file_acl, LINUX_S_ISDIR(inode.i_mode) ? inode.i_dir_acl : 0,
 437                         inode.osd1.hurd1.h_i_translator);
 438         else
 439                 fprintf(out, "File ACL: %d    Directory ACL: %d\n",
 440                         inode.i_file_acl, LINUX_S_ISDIR(inode.i_mode) ? inode.i_dir_acl : 0);
 441         fprintf(out, "Links: %d   Blockcount: %d\n", inode.i_links_count,
 442                 inode.i_blocks);
 443         switch (os) {
 444             case EXT2_OS_LINUX:
 445                 frag = inode.osd2.linux2.l_i_frag;
 446                 fsize = inode.osd2.linux2.l_i_fsize;
 447                 break;
 448             case EXT2_OS_HURD:
 449                 frag = inode.osd2.hurd2.h_i_frag;
 450                 fsize = inode.osd2.hurd2.h_i_fsize;
 451                 break;
 452             case EXT2_OS_MASIX:
 453                 frag = inode.osd2.masix2.m_i_frag;
 454                 fsize = inode.osd2.masix2.m_i_fsize;
 455                 break;
 456             default:
 457                 frag = fsize = 0;
 458         }
 459         fprintf(out, "Fragment:  Address: %d    Number: %d    Size: %d\n",
 460                 inode.i_faddr, frag, fsize);
 461         fprintf(out, "ctime: 0x%08x -- %s", inode.i_ctime,
 462                 time_to_string(inode.i_ctime));
 463         fprintf(out, "atime: 0x%08x -- %s", inode.i_atime,
 464                 time_to_string(inode.i_atime));
 465         fprintf(out, "mtime: 0x%08x -- %s", inode.i_mtime,
 466                 time_to_string(inode.i_mtime));
 467         if (inode.i_dtime)
 468           fprintf(out, "dtime: 0x%08x -- %s", inode.i_dtime,
 469                   time_to_string(inode.i_dtime));
 470         if (LINUX_S_ISLNK(inode.i_mode) && inode.i_blocks == 0)
 471                 fprintf(out, "Fast_link_dest: %s\n", (char *)inode.i_block);
 472         else
 473                 dump_blocks(out, inode_num);
 474         close_pager(out);
 475 }
 476
 477
 478 void do_stat(int argc, char *argv[])
 479 {
 480         ino_t   inode;
 481         struct ext2_inode inode_buf;
 482         int retval;
 483
 484         if (argc != 2) {
 485                 com_err(argv[0], 0, "Usage: stat <file>");
 486                 return;
 487         }
 488         if (check_fs_open(argv[0]))
 489                 return;
 490         inode = string_to_inode(argv[1]);
 491         if (!inode)
 492                 return;
 493
 494         retval = ext2fs_read_inode(current_fs, inode, &inode_buf);
 495         if (retval)
 496           {
 497             com_err(argv[0], retval, "while trying to read inode %d", inode);
 498             return;
 499           }
 500
 501         dump_inode(inode,inode_buf);
 502         return;
 503 }
 504
 505 void do_chroot(int argc, char *argv[])
 506 {
 507         ino_t inode;
 508         int retval;
 509
 510         if (argc != 2) {
 511                 com_err(argv[0], 0, "Usage: chroot <file>");
 512                 return;
 513         }
 514         if (check_fs_open(argv[0]))
 515                 return;
 516         inode = string_to_inode(argv[1]);
 517         if (!inode)
 518                 return;
 519
 520         retval = ext2fs_check_directory(current_fs, inode);
 521         if (retval)  {
 522                 com_err(argv[1], retval, "");
 523                 return;
 524         }
 525         root = inode;
 526 }
 527
 528 void do_clri(int argc, char *argv[])
 529 {
 530         ino_t inode;
 531         int retval;
 532         struct ext2_inode inode_buf;
 533
 534         if (argc != 2) {
 535                 com_err(argv[0], 0, "Usage: clri <file>");
 536                 return;
 537         }
 538         if (check_fs_open(argv[0]))
 539                 return;
 540         if (check_fs_read_write(argv[0]))
 541                 return;
 542         inode = string_to_inode(argv[1]);
 543         if (!inode)
 544                 return;
 545
 546         retval = ext2fs_read_inode(current_fs, inode, &inode_buf);
 547         if (retval) {
 548                 com_err(argv[0], retval, "while trying to read inode %d",
 549                         inode);
 550                 return;
 551         }
 552         memset(&inode_buf, 0, sizeof(inode_buf));
 553         retval = ext2fs_write_inode(current_fs, inode, &inode_buf);
 554         if (retval) {
 555                 com_err(argv[0], retval, "while trying to write inode %d",
 556                         inode);
 557                 return;
 558         }
 559 }
 560
 561 void do_freei(int argc, char *argv[])
 562 {
 563         ino_t inode;
 564
 565         if (argc != 2) {
 566                 com_err(argv[0], 0, "Usage: freei <file>");
 567                 return;
 568         }
 569         if (check_fs_open(argv[0]))
 570                 return;
 571         if (check_fs_read_write(argv[0]))
 572                 return;
 573         inode = string_to_inode(argv[1]);
 574         if (!inode)
 575                 return;
 576
 577         if (!ext2fs_test_inode_bitmap(current_fs->inode_map,inode))
 578                 com_err(argv[0], 0, "Warning: inode already clear");
 579         ext2fs_unmark_inode_bitmap(current_fs->inode_map,inode);
 580         ext2fs_mark_ib_dirty(current_fs);
 581 }
 582
 583 void do_seti(int argc, char *argv[])
 584 {
 585         ino_t inode;
 586
 587         if (argc != 2) {
 588                 com_err(argv[0], 0, "Usage: seti <file>");
 589                 return;
 590         }
 591         if (check_fs_open(argv[0]))
 592                 return;
 593         if (check_fs_read_write(argv[0]))
 594                 return;
 595         inode = string_to_inode(argv[1]);
 596         if (!inode)
 597                 return;
 598
 599         if (ext2fs_test_inode_bitmap(current_fs->inode_map,inode))
 600                 com_err(argv[0], 0, "Warning: inode already set");
 601         ext2fs_mark_inode_bitmap(current_fs->inode_map,inode);
 602         ext2fs_mark_ib_dirty(current_fs);
 603 }
 604
 605 void do_testi(int argc, char *argv[])
 606 {
 607         ino_t inode;
 608
 609         if (argc != 2) {
 610                 com_err(argv[0], 0, "Usage: testi <file>");
 611                 return;
 612         }
 613         if (check_fs_open(argv[0]))
 614                 return;
 615         inode = string_to_inode(argv[1]);
 616         if (!inode)
 617                 return;
 618
 619         if (ext2fs_test_inode_bitmap(current_fs->inode_map,inode))
 620                 printf("Inode %ld is marked in use\n", inode);
 621         else
 622                 printf("Inode %ld is not in use\n", inode);
 623 }
 624
 625
 626 void do_freeb(int argc, char *argv[])
 627 {
 628         blk_t block;
 629         char *tmp;
 630
 631         if (argc != 2) {
 632                 com_err(argv[0], 0, "Usage: freeb <block>");
 633                 return;
 634         }
 635         if (check_fs_open(argv[0]))
 636                 return;
 637         if (check_fs_read_write(argv[0]))
 638                 return;
 639         block = strtoul(argv[1], &tmp, 0);
 640         if (!block || *tmp) {
 641                 com_err(argv[0], 0, "No block 0");
 642                 return;
 643         }
 644         if (!ext2fs_test_block_bitmap(current_fs->block_map,block))
 645                 com_err(argv[0], 0, "Warning: block already clear");
 646         ext2fs_unmark_block_bitmap(current_fs->block_map,block);
 647         ext2fs_mark_bb_dirty(current_fs);
 648 }
 649
 650 void do_setb(int argc, char *argv[])
 651 {
 652         blk_t block;
 653         char *tmp;
 654
 655         if (argc != 2) {
 656                 com_err(argv[0], 0, "Usage: setb <block>");
 657                 return;
 658         }
 659         if (check_fs_open(argv[0]))
 660                 return;
 661         if (check_fs_read_write(argv[0]))
 662                 return;
 663         block = strtoul(argv[1], &tmp, 0);
 664         if (!block || *tmp) {
 665                 com_err(argv[0], 0, "No block 0");
 666                 return;
 667         }
 668         if (ext2fs_test_block_bitmap(current_fs->block_map,block))
 669                 com_err(argv[0], 0, "Warning: block already set");
 670         ext2fs_mark_block_bitmap(current_fs->block_map,block);
 671         ext2fs_mark_bb_dirty(current_fs);
 672 }
 673
 674 void do_testb(int argc, char *argv[])
 675 {
 676         blk_t block;
 677         char *tmp;
 678
 679         if (argc != 2) {
 680                 com_err(argv[0], 0, "Usage: testb <block>");
 681                 return;
 682         }
 683         if (check_fs_open(argv[0]))
 684                 return;
 685         block = strtoul(argv[1], &tmp, 0);
 686         if (!block || *tmp) {
 687                 com_err(argv[0], 0, "No block 0");
 688                 return;
 689         }
 690         if (ext2fs_test_block_bitmap(current_fs->block_map,block))
 691                 printf("Block %d marked in use\n", block);
 692         else printf("Block %d not in use\n", block);
 693 }
 694
 695 static void modify_u8(char *com, const char *prompt,
 696                       const char *format, __u8 *val)
 697 {
 698         char buf[200];
 699         unsigned long v;
 700         char *tmp;
 701
 702         sprintf(buf, format, *val);
 703         printf("%30s    [%s] ", prompt, buf);
 704         fgets(buf, sizeof(buf), stdin);
 705         if (buf[strlen (buf) - 1] == '\n')
 706                 buf[strlen (buf) - 1] = '\0';
 707         if (!buf[0])
 708                 return;
 709         v = strtoul(buf, &tmp, 0);
 710         if (*tmp)
 711                 com_err(com, 0, "Bad value - %s", buf);
 712         else
 713                 *val = v;
 714 }
 715
 716 static void modify_u16(char *com, const char *prompt,
 717                        const char *format, __u16 *val)
 718 {
 719         char buf[200];
 720         unsigned long v;
 721         char *tmp;
 722
 723         sprintf(buf, format, *val);
 724         printf("%30s    [%s] ", prompt, buf);
 725         fgets(buf, sizeof(buf), stdin);
 726         if (buf[strlen (buf) - 1] == '\n')
 727                 buf[strlen (buf) - 1] = '\0';
 728         if (!buf[0])
 729                 return;
 730         v = strtoul(buf, &tmp, 0);
 731         if (*tmp)
 732                 com_err(com, 0, "Bad value - %s", buf);
 733         else
 734                 *val = v;
 735 }
 736
 737 static void modify_u32(char *com, const char *prompt,
 738                        const char *format, __u32 *val)
 739 {
 740         char buf[200];
 741         unsigned long v;
 742         char *tmp;
 743
 744         sprintf(buf, format, *val);
 745         printf("%30s    [%s] ", prompt, buf);
 746         fgets(buf, sizeof(buf), stdin);
 747         if (buf[strlen (buf) - 1] == '\n')
 748                 buf[strlen (buf) - 1] = '\0';
 749         if (!buf[0])
 750                 return;
 751         v = strtoul(buf, &tmp, 0);
 752         if (*tmp)
 753                 com_err(com, 0, "Bad value - %s", buf);
 754         else
 755                 *val = v;
 756 }
 757
 758
 759 void do_modify_inode(int argc, char *argv[])
 760 {
 761         struct ext2_inode inode;
 762         ino_t inode_num;
 763         int i;
 764         errcode_t       retval;
 765         unsigned char *frag, *fsize;
 766         char    buf[80];
 767         int os = current_fs->super->s_creator_os;
 768         const char *hex_format = "0x%x";
 769         const char *octal_format = "0%o";
 770         const char *decimal_format = "%d";
 771
 772         if (argc != 2) {
 773                 com_err(argv[0], 0, "Usage: modify_inode <file>");
 774                 return;
 775         }
 776         if (check_fs_open(argv[0]))
 777                 return;
 778         if (check_fs_read_write(argv[0]))
 779                 return;
 780
 781         inode_num = string_to_inode(argv[1]);
 782         if (!inode_num)
 783                 return;
 784
 785         retval = ext2fs_read_inode(current_fs, inode_num, &inode);
 786         if (retval) {
 787                 com_err(argv[1], retval, "while trying to read inode %d",
 788                         inode_num);
 789                 return;
 790         }
 791
 792         modify_u16(argv[0], "Mode", octal_format, &inode.i_mode);
 793         modify_u16(argv[0], "User ID", decimal_format, &inode.i_uid);
 794         modify_u16(argv[0], "Group ID", decimal_format, &inode.i_gid);
 795         modify_u32(argv[0], "Size", decimal_format, &inode.i_size);
 796         modify_u32(argv[0], "Creation time", decimal_format, &inode.i_ctime);
 797         modify_u32(argv[0], "Modification time", decimal_format, &inode.i_mtime);
 798         modify_u32(argv[0], "Access time", decimal_format, &inode.i_atime);
 799         modify_u32(argv[0], "Deletion time", decimal_format, &inode.i_dtime);
 800         modify_u16(argv[0], "Link count", decimal_format, &inode.i_links_count);
 801         modify_u32(argv[0], "Block count", decimal_format, &inode.i_blocks);
 802         modify_u32(argv[0], "File flags", hex_format, &inode.i_flags);
 803 #if 0
 804         modify_u32(argv[0], "Reserved1", decimal_format, &inode.i_reserved1);
 805 #endif
 806         modify_u32(argv[0], "File acl", decimal_format, &inode.i_file_acl);
 807         if (LINUX_S_ISDIR(inode.i_mode))
 808                 modify_u32(argv[0], "Directory acl", decimal_format, &inode.i_dir_acl);
 809         else
 810                 modify_u32(argv[0], "High 32bits of size", decimal_format, &inode.i_size_high);
 811
 812         if (current_fs->super->s_creator_os == EXT2_OS_HURD)
 813                 modify_u32(argv[0], "Translator Block",
 814                             decimal_format, &inode.osd1.hurd1.h_i_translator);
 815
 816         modify_u32(argv[0], "Fragment address", decimal_format, &inode.i_faddr);
 817         switch (os) {
 818             case EXT2_OS_LINUX:
 819                 frag = &inode.osd2.linux2.l_i_frag;
 820                 fsize = &inode.osd2.linux2.l_i_fsize;
 821                 break;
 822             case EXT2_OS_HURD:
 823                 frag = &inode.osd2.hurd2.h_i_frag;
 824                 fsize = &inode.osd2.hurd2.h_i_fsize;
 825                 break;
 826             case EXT2_OS_MASIX:
 827                 frag = &inode.osd2.masix2.m_i_frag;
 828                 fsize = &inode.osd2.masix2.m_i_fsize;
 829                 break;
 830             default:
 831                 frag = fsize = 0;
 832         }
 833         if (frag)
 834                 modify_u8(argv[0], "Fragment number", decimal_format, frag);
 835         if (fsize)
 836                 modify_u8(argv[0], "Fragment size", decimal_format, fsize);
 837
 838         for (i=0;  i < EXT2_NDIR_BLOCKS; i++) {
 839                 sprintf(buf, "Direct Block #%d", i);
 840                 modify_u32(argv[0], buf, decimal_format, &inode.i_block[i]);
 841         }
 842         modify_u32(argv[0], "Indirect Block", decimal_format,
 843                     &inode.i_block[EXT2_IND_BLOCK]);
 844         modify_u32(argv[0], "Double Indirect Block", decimal_format,
 845                     &inode.i_block[EXT2_DIND_BLOCK]);
 846         modify_u32(argv[0], "Triple Indirect Block", decimal_format,
 847                     &inode.i_block[EXT2_TIND_BLOCK]);
 848         retval = ext2fs_write_inode(current_fs, inode_num, &inode);
 849         if (retval) {
 850                 com_err(argv[1], retval, "while trying to write inode %d",
 851                         inode_num);
 852                 return;
 853         }
 854 }
 855
 856 void do_change_working_dir(int argc, char *argv[])
 857 {
 858         ino_t   inode;
 859         int     retval;
 860
 861         if (argc != 2) {
 862                 com_err(argv[0], 0, "Usage: cd <file>");
 863                 return;
 864         }
 865         if (check_fs_open(argv[0]))
 866                 return;
 867
 868         inode = string_to_inode(argv[1]);
 869         if (!inode)
 870                 return;
 871
 872         retval = ext2fs_check_directory(current_fs, inode);
 873         if (retval) {
 874                 com_err(argv[1], retval, "");
 875                 return;
 876         }
 877         cwd = inode;
 878         return;
 879 }
 880
 881 void do_print_working_directory(int argc, char *argv[])
 882 {
 883         int     retval;
 884         char    *pathname = NULL;
 885
 886         if (argc > 1) {
 887                 com_err(argv[0], 0, "Usage: print_working_directory");
 888                 return;
 889         }
 890         if (check_fs_open(argv[0]))
 891                 return;
 892
 893         retval = ext2fs_get_pathname(current_fs, cwd, 0, &pathname);
 894         if (retval) {
 895                 com_err(argv[0], retval,
 896                         "while trying to get pathname of cwd");
 897         }
 898         printf("[pwd]   INODE: %6ld  PATH: %s\n", cwd, pathname);
 899         free(pathname);
 900         retval = ext2fs_get_pathname(current_fs, root, 0, &pathname);
 901         if (retval) {
 902                 com_err(argv[0], retval,
 903                         "while trying to get pathname of root");
 904         }
 905         printf("[root]  INODE: %6ld  PATH: %s\n", root, pathname);
 906         free(pathname);
 907         return;
 908 }
 909
 910 static void make_link(char *sourcename, char *destname)
 911 {
 912         ino_t   inode;
 913         int     retval;
 914         ino_t   dir;
 915         char    *dest, *cp, *basename;
 916
 917         /*
 918          * Get the source inode
 919          */
 920         inode = string_to_inode(sourcename);
 921         if (!inode)
 922                 return;
 923         basename = strrchr(sourcename, '/');
 924         if (basename)
 925                 basename++;
 926         else
 927                 basename = sourcename;
 928         /*
 929          * Figure out the destination.  First see if it exists and is
 930          * a directory.
 931          */
 932         if (! (retval=ext2fs_namei(current_fs, root, cwd, destname, &dir)))
 933                 dest = basename;
 934         else {
 935                 /*
 936                  * OK, it doesn't exist.  See if it is
 937                  * '<dir>/basename' or 'basename'
 938                  */
 939                 cp = strrchr(destname, '/');
 940                 if (cp) {
 941                         *cp = 0;
 942                         dir = string_to_inode(destname);
 943                         if (!dir)
 944                                 return;
 945                         dest = cp+1;
 946                 } else {
 947                         dir = cwd;
 948                         dest = destname;
 949                 }
 950         }
 951
 952         retval = ext2fs_link(current_fs, dir, dest, inode, 0);
 953         if (retval)
 954                 com_err("make_link", retval, "");
 955         return;
 956 }
 957
 958
 959 void do_link(int argc, char *argv[])
 960 {
 961         if (argc != 3) {
 962                 com_err(argv[0], 0, "Usage: link <source_file> <dest_name>");
 963                 return;
 964         }
 965         if (check_fs_open(argv[0]))
 966                 return;
 967
 968         make_link(argv[1], argv[2]);
 969 }
 970
 971 static void unlink_file_by_name(char *filename)
 972 {
 973         int     retval;
 974         ino_t   dir;
 975         char    *basename;
 976
 977         basename = strrchr(filename, '/');
 978         if (basename) {
 979                 *basename++ = '\0';
 980                 dir = string_to_inode(filename);
 981                 if (!dir)
 982                         return;
 983         } else {
 984                 dir = cwd;
 985                 basename = filename;
 986         }
 987         retval = ext2fs_unlink(current_fs, dir, basename, 0, 0);
 988         if (retval)
 989                 com_err("unlink_file_by_name", retval, "");
 990         return;
 991 }
 992
 993 void do_unlink(int argc, char *argv[])
 994 {
 995         if (argc != 2) {
 996                 com_err(argv[0], 0, "Usage: unlink <pathname>");
 997                 return;
 998         }
 999         if (check_fs_open(argv[0]))
1000                 return;
1001
1002         unlink_file_by_name(argv[1]);
1003 }
1004
1005 void do_find_free_block(int argc, char *argv[])
1006 {
1007         blk_t   free_blk, goal;
1008         errcode_t       retval;
1009         char            *tmp;
1010
1011         if ((argc > 2) || (argc==2 && *argv[1] == '?')) {
1012                 com_err(argv[0], 0, "Usage: find_free_block [goal]");
1013                 return;
1014         }
1015         if (check_fs_open(argv[0]))
1016                 return;
1017
1018         if (argc > 1) {
1019                 goal = strtol(argv[1], &tmp, 0);
1020                 if (*tmp) {
1021                         com_err(argv[0], 0, "Bad goal - %s", argv[1]);
1022                         return;
1023                 }
1024         }
1025         else
1026                 goal = current_fs->super->s_first_data_block;
1027
1028         retval = ext2fs_new_block(current_fs, goal, 0, &free_blk);
1029         if (retval)
1030                 com_err("ext2fs_new_block", retval, "");
1031         else
1032                 printf("Free block found: %d\n", free_blk);
1033
1034 }
1035
1036 void do_find_free_inode(int argc, char *argv[])
1037 {
1038         ino_t   free_inode, dir;
1039         int     mode;
1040         int     retval;
1041         char    *tmp;
1042
1043         if (argc > 3 || (argc>1 && *argv[1] == '?')) {
1044                 com_err(argv[0], 0, "Usage: find_free_inode [dir] [mode]");
1045                 return;
1046         }
1047         if (check_fs_open(argv[0]))
1048                 return;
1049
1050         if (argc > 1) {
1051                 dir = strtol(argv[1], &tmp, 0);
1052                 if (*tmp) {
1053                         com_err(argv[0], 0, "Bad dir - %s", argv[1]);
1054                         return;
1055                 }
1056         }
1057         else
1058                 dir = root;
1059         if (argc > 2) {
1060                 mode = strtol(argv[2], &tmp, 0);
1061                 if (*tmp) {
1062                         com_err(argv[0], 0, "Bad mode - %s", argv[2]);
1063                         return;
1064                 }
1065         } else
1066                 mode = 010755;
1067
1068         retval = ext2fs_new_inode(current_fs, dir, mode, 0, &free_inode);
1069         if (retval)
1070                 com_err("ext2fs_new_inode", retval, "");
1071         else
1072                 printf("Free inode found: %ld\n", free_inode);
1073 }
1074
1075 static errcode_t copy_file(int fd, ino_t newfile)
1076 {
1077         ext2_file_t     e2_file;
1078         errcode_t       retval;
1079         unsigned int    got, written;
1080         char            buf[8192];
1081         char            *ptr;
1082
1083         retval = ext2fs_file_open(current_fs, newfile,
1084                                   EXT2_FILE_WRITE, &e2_file);
1085         if (retval)
1086                 return retval;
1087
1088         while (1) {
1089                 got = read(fd, buf, sizeof(buf));
1090                 if (got == 0)
1091                         break;
1092                 if (got < 0) {
1093                         retval = errno;
1094                         goto fail;
1095                 }
1096                 ptr = buf;
1097                 while (got > 0) {
1098                         retval = ext2fs_file_write(e2_file, ptr,
1099                                                    got, &written);
1100                         if (retval)
1101                                 goto fail;
1102
1103                         got -= written;
1104                         ptr += written;
1105                 }
1106         }
1107         retval = ext2fs_file_close(e2_file);
1108
1109         return retval;
1110
1111 fail:
1112         (void) ext2fs_file_close(e2_file);
1113         return retval;
1114 }
1115
1116
1117 void do_write(int argc, char *argv[])
1118 {
1119         int     fd;
1120         struct stat statbuf;
1121         ino_t   newfile;
1122         errcode_t retval;
1123         struct ext2_inode inode;
1124         dgrp_t group;
1125
1126         if (check_fs_open(argv[0]))
1127                 return;
1128         if (argc != 3) {
1129                 com_err(argv[0], 0, "Usage: write <nativefile> <newfile>");
1130                 return;
1131         }
1132         if (check_fs_read_write(argv[0]))
1133                 return;
1134         fd = open(argv[1], O_RDONLY);
1135         if (fd < 0) {
1136                 com_err(argv[1], fd, "");
1137                 return;
1138         }
1139         if (fstat(fd, &statbuf) < 0) {
1140                 com_err(argv[1], errno, "");
1141                 close(fd);
1142                 return;
1143         }
1144
1145         retval = ext2fs_new_inode(current_fs, cwd, 010755, 0, &newfile);
1146         if (retval) {
1147                 com_err(argv[0], retval, "");
1148                 close(fd);
1149                 return;
1150         }
1151         group = ext2fs_group_of_ino(current_fs, newfile);
1152         current_fs->group_desc[group].bg_free_inodes_count--;
1153         current_fs->super->s_free_inodes_count--;
1154         ext2fs_mark_super_dirty(current_fs);
1155         printf("Allocated inode: %ld\n", newfile);
1156         retval = ext2fs_link(current_fs, cwd, argv[2], newfile, 0);
1157         if (retval) {
1158                 com_err(argv[2], retval, "");
1159                 close(fd);
1160                 return;
1161         }
1162         if (ext2fs_test_inode_bitmap(current_fs->inode_map,newfile))
1163                 com_err(argv[0], 0, "Warning: inode already set");
1164         ext2fs_mark_inode_bitmap(current_fs->inode_map,newfile);
1165         ext2fs_mark_ib_dirty(current_fs);
1166         memset(&inode, 0, sizeof(inode));
1167         inode.i_mode = statbuf.st_mode;
1168         inode.i_atime = inode.i_ctime = inode.i_mtime = time(NULL);
1169         inode.i_links_count = 1;
1170         inode.i_size = statbuf.st_size;
1171         ext2fs_write_inode(current_fs, newfile, &inode);
1172         retval = ext2fs_write_inode(current_fs, newfile, &inode);
1173         if (retval) {
1174                 com_err(argv[0], retval, "while trying to write inode %d",
1175                         inode);
1176                 close(fd);
1177                 return;
1178         }
1179         if (LINUX_S_ISREG(inode.i_mode)) {
1180                 retval = copy_file(fd, newfile);
1181                 if (retval)
1182                         com_err("copy_file", retval, "");
1183         }
1184         close(fd);
1185 }
1186
1187 void do_mknod(int argc, char *argv[])
1188 {
1189         unsigned long mode, major, minor, nr;
1190         ino_t   newfile;
1191         errcode_t retval;
1192         struct ext2_inode inode;
1193
1194         if (check_fs_open(argv[0]))
1195                 return;
1196         if (argc < 3 || argv[2][1]) {
1197                 com_err(argv[0], 0, "Usage: mknod <name> [p| [c|b] <major> <minor>]");
1198                 return;
1199         }
1200         mode = minor = major = 0;
1201         switch (argv[2][0]) {
1202                 case 'p':
1203                         mode = LINUX_S_IFIFO;
1204                         nr = 3;
1205                         break;
1206                 case 'c':
1207                         mode = LINUX_S_IFCHR;
1208                         nr = 5;
1209                         break;
1210                 case 'b':
1211                         mode = LINUX_S_IFBLK;
1212                         nr = 5;
1213                         break;
1214                 default:
1215                         nr = 0;
1216         }
1217         if (nr == 5) {
1218                 major = strtoul(argv[3], argv+3, 0);
1219                 minor = strtoul(argv[4], argv+4, 0);
1220                 if (major > 255 || minor > 255 || argv[3][0] || argv[4][0])
1221                         nr = 0;
1222         }
1223         if (argc != nr) {
1224                 com_err(argv[0], 0, "Usage: mknod <name> [p| [c|b] <major> <minor>]");
1225                 return;
1226         }
1227         if (check_fs_read_write(argv[0]))
1228                 return;
1229         retval = ext2fs_new_inode(current_fs, cwd, 010755, 0, &newfile);
1230         if (retval) {
1231                 com_err(argv[0], retval, "");
1232                 return;
1233         }
1234         printf("Allocated inode: %ld\n", newfile);
1235         retval = ext2fs_link(current_fs, cwd, argv[1], newfile, 0);
1236         if (retval) {
1237                 if (retval == EXT2_ET_DIR_NO_SPACE) {
1238                         retval = ext2fs_expand_dir(current_fs, cwd);
1239                         if (!retval)
1240                                 retval = ext2fs_link(current_fs, cwd,
1241                                                      argv[1], newfile, 0);
1242                 }
1243                 if (retval) {
1244                         com_err(argv[1], retval, "");
1245                         return;
1246                 }
1247         }
1248         if (ext2fs_test_inode_bitmap(current_fs->inode_map,newfile))
1249                 com_err(argv[0], 0, "Warning: inode already set");
1250         ext2fs_mark_inode_bitmap(current_fs->inode_map, newfile);
1251         ext2fs_mark_ib_dirty(current_fs);
1252         memset(&inode, 0, sizeof(inode));
1253         inode.i_mode = mode;
1254         inode.i_atime = inode.i_ctime = inode.i_mtime = time(NULL);
1255         inode.i_block[0] = major*256+minor;
1256         inode.i_links_count = 1;
1257         ext2fs_write_inode(current_fs, newfile, &inode);
1258         retval = ext2fs_write_inode(current_fs, newfile, &inode);
1259         if (retval) {
1260                 com_err(argv[0], retval, "while trying to write inode %d", inode);
1261                 return;
1262         }
1263 }
1264
1265 void do_mkdir(int argc, char *argv[])
1266 {
1267         char    *cp;
1268         ino_t   parent;
1269         char    *name;
1270         errcode_t retval;
1271
1272         if (check_fs_open(argv[0]))
1273                 return;
1274
1275         if (argc != 2) {
1276                 com_err(argv[0], 0, "Usage: mkdir <file>");
1277                 return;
1278         }
1279
1280         if (check_fs_read_write(argv[0]))
1281                 return;
1282
1283         cp = strrchr(argv[1], '/');
1284         if (cp) {
1285                 *cp = 0;
1286                 parent = string_to_inode(argv[1]);
1287                 if (!parent) {
1288                         com_err(argv[1], ENOENT, "");
1289                         return;
1290                 }
1291                 name = cp+1;
1292         } else {
1293                 parent = cwd;
1294                 name = argv[1];
1295         }
1296
1297
1298         retval = ext2fs_mkdir(current_fs, parent, 0, name);
1299         if (retval) {
1300                 com_err("ext2fs_mkdir", retval, "");
1301                 return;
1302         }
1303
1304 }
1305
1306 void do_rmdir(int argc, char *argv[])
1307 {
1308         printf("Unimplemented\n");
1309 }
1310
1311
1312 static int release_blocks_proc(ext2_filsys fs, blk_t *blocknr,
1313                                int blockcnt, void *private)
1314 {
1315         printf("%d ", *blocknr);
1316         ext2fs_unmark_block_bitmap(fs->block_map,*blocknr);
1317         return 0;
1318 }
1319
1320 static void kill_file_by_inode(ino_t inode)
1321 {
1322         struct ext2_inode inode_buf;
1323
1324         ext2fs_read_inode(current_fs, inode, &inode_buf);
1325         inode_buf.i_dtime = time(NULL);
1326         ext2fs_write_inode(current_fs, inode, &inode_buf);
1327
1328         printf("Kill file by inode %ld\n", inode);
1329         ext2fs_block_iterate(current_fs, inode, 0, NULL,
1330                              release_blocks_proc, NULL);
1331         printf("\n");
1332         ext2fs_unmark_inode_bitmap(current_fs->inode_map, inode);
1333
1334         ext2fs_mark_bb_dirty(current_fs);
1335         ext2fs_mark_ib_dirty(current_fs);
1336 }
1337
1338
1339 void do_kill_file(int argc, char *argv[])
1340 {
1341         ino_t inode_num;
1342
1343         if (argc != 2) {
1344                 com_err(argv[0], 0, "Usage: kill_file <file>");
1345                 return;
1346         }
1347         if (check_fs_open(argv[0]))
1348                 return;
1349
1350         if (check_fs_read_write(argv[0]))
1351                 return;
1352
1353         inode_num = string_to_inode(argv[1]);
1354         if (!inode_num) {
1355                 com_err(argv[0], 0, "Cannot find file");
1356                 return;
1357         }
1358         kill_file_by_inode(inode_num);
1359 }
1360
1361 void do_rm(int argc, char *argv[])
1362 {
1363         int retval;
1364         ino_t inode_num;
1365         struct ext2_inode inode;
1366
1367         if (argc != 2) {
1368                 com_err(argv[0], 0, "Usage: rm <filename>");
1369                 return;
1370         }
1371         if (check_fs_open(argv[0]))
1372                 return;
1373
1374         if (check_fs_read_write(argv[0]))
1375                 return;
1376
1377         retval = ext2fs_namei(current_fs, root, cwd, argv[1], &inode_num);
1378         if (retval) {
1379                 com_err(argv[0], retval, "while trying to resolve filename");
1380                 return;
1381         }
1382
1383         retval = ext2fs_read_inode(current_fs,inode_num,&inode);
1384         if (retval) {
1385                 com_err(argv[0], retval, "while reading file's inode");
1386                 return;
1387         }
1388
1389         if (LINUX_S_ISDIR(inode.i_mode)) {
1390                 com_err(argv[0], 0, "file is a directory");
1391                 return;
1392         }
1393
1394         --inode.i_links_count;
1395         retval = ext2fs_write_inode(current_fs,inode_num,&inode);
1396         if (retval) {
1397                 com_err(argv[0], retval, "while writing inode");
1398                 return;
1399         }
1400
1401         unlink_file_by_name(argv[1]);
1402         if (inode.i_links_count == 0)
1403                 kill_file_by_inode(inode_num);
1404 }
1405
1406 void do_show_debugfs_params(int argc, char *argv[])
1407 {
1408         FILE *out = stdout;
1409
1410         if (current_fs)
1411                 fprintf(out, "Open mode: read-%s\n",
1412                         current_fs->flags & EXT2_FLAG_RW ? "write" : "only");
1413         fprintf(out, "Filesystem in use: %s\n",
1414                 current_fs ? current_fs->device_name : "--none--");
1415 }
1416
1417 void do_expand_dir(int argc, char *argv[])
1418 {
1419         ino_t inode;
1420         int retval;
1421
1422         if (argc != 2) {
1423                 com_err(argv[0], 0, "Usage: expand_dir <file>");
1424                 return;
1425         }
1426         if (check_fs_open(argv[0]))
1427                 return;
1428         inode = string_to_inode(argv[1]);
1429         if (!inode)
1430                 return;
1431
1432         retval = ext2fs_expand_dir(current_fs, inode);
1433         if (retval)
1434                 com_err("ext2fs_expand_dir", retval, "");
1435         return;
1436 }
1437
1438 void do_features(int argc, char *argv[])
1439 {
1440         int     i;
1441
1442         if (check_fs_open(argv[0]))
1443                 return;
1444
1445         if ((argc != 1) && check_fs_read_write(argv[0]))
1446                 return;
1447         for (i=1; i < argc; i++) {
1448                 if (e2p_edit_feature(argv[i],
1449                                      &current_fs->super->s_feature_compat, 0))
1450                         com_err(argv[0], 0, "Unknown feature: %s\n",
1451                                 argv[i]);
1452                 else
1453                         ext2fs_mark_super_dirty(current_fs);
1454         }
1455         print_features((struct ext2fs_sb *) current_fs->super, stdout);
1456 }
1457
1458 static int source_file(const char *cmd_file, int sci_idx)
1459 {
1460         FILE            *f;
1461         char            buf[256];
1462         char            *cp;
1463         int             exit_status = 0;
1464         int             retval;
1465
1466         if (strcmp(cmd_file, "-") == 0)
1467                 f = stdin;
1468         else {
1469                 f = fopen(cmd_file, "r");
1470                 if (!f) {
1471                         perror(cmd_file);
1472                         exit(1);
1473                 }
1474         }
1475         setbuf(stdout, NULL);
1476         setbuf(stderr, NULL);
1477         while (!feof(f)) {
1478                 if (fgets(buf, sizeof(buf), f) == NULL)
1479                         break;
1480                 cp = strchr(buf, '\n');
1481                 if (cp)
1482                         *cp = 0;
1483                 cp = strchr(buf, '\r');
1484                 if (cp)
1485                         *cp = 0;
1486                 printf("debugfs: %s\n", buf);
1487                 retval = ss_execute_line(sci_idx, buf);
1488                 if (retval) {
1489                         ss_perror(sci_idx, retval, buf);
1490                         exit_status++;
1491                 }
1492         }
1493         return exit_status;
1494 }
1495
1496 int main(int argc, char **argv)
1497 {
1498         int             retval;
1499         int             sci_idx;
1500         const char      *usage = "Usage: debugfs [-b blocksize] [-s superblock] [-f cmd_file] [-R request] [-V] [[-w] [-c] device]";
1501         int             c;
1502         int             open_flags = 0;
1503         char            *request = 0;
1504         int             exit_status = 0;
1505         char            *cmd_file = 0;
1506         blk_t           superblock = 0;
1507         blk_t           blocksize = 0;
1508         int             catastrophic = 0;
1509         char            *tmp;
1510
1511         initialize_ext2_error_table();
1512         fprintf (stderr, "debugfs %s, %s for EXT2 FS %s, %s\n",
1513                  E2FSPROGS_VERSION, E2FSPROGS_DATE,
1514                  EXT2FS_VERSION, EXT2FS_DATE);
1515
1516         while ((c = getopt (argc, argv, "wcR:f:b:s:V")) != EOF) {
1517                 switch (c) {
1518                 case 'R':
1519                         request = optarg;
1520                         break;
1521                 case 'f':
1522                         cmd_file = optarg;
1523                         break;
1524                 case 'w':
1525                         open_flags = EXT2_FLAG_RW;
1526                         break;
1527                 case 'b':
1528                         blocksize = strtoul(optarg, &tmp, 0);
1529                         if (*tmp) {
1530                                 com_err(argv[0], 0,
1531                                         "Bad block size - %s", optarg);
1532                                 return 1;
1533                         }
1534                         break;
1535                 case 's':
1536                         superblock = strtoul(optarg, &tmp, 0);
1537                         if (*tmp) {
1538                                 com_err(argv[0], 0,
1539                                         "Bad superblock number - %s", optarg);
1540                                 return 1;
1541                         }
1542                         break;
1543                 case 'c':
1544                         catastrophic = 1;
1545                         break;
1546                 case 'V':
1547                         /* Print version number and exit */
1548                         fprintf(stderr, "\tUsing %s\n",
1549                                 error_message(EXT2_ET_BASE));
1550                         exit(0);
1551                 default:
1552                         com_err(argv[0], 0, usage);
1553                         return 1;
1554                 }
1555         }
1556         if (optind < argc)
1557                 open_filesystem(argv[optind], open_flags,
1558                                 superblock, blocksize, catastrophic);
1559
1560         sci_idx = ss_create_invocation("debugfs", "0.0", (char *) NULL,
1561                                        &debug_cmds, &retval);
1562         if (retval) {
1563                 ss_perror(sci_idx, retval, "creating invocation");
1564                 exit(1);
1565         }
1566
1567         (void) ss_add_request_table (sci_idx, &ss_std_requests, 1, &retval);
1568         if (retval) {
1569                 ss_perror(sci_idx, retval, "adding standard requests");
1570                 exit (1);
1571         }
1572         if (request) {
1573                 retval = 0;
1574                 retval = ss_execute_line(sci_idx, request);
1575                 if (retval) {
1576                         ss_perror(sci_idx, retval, request);
1577                         exit_status++;
1578                 }
1579         } else if (cmd_file) {
1580                 exit_status = source_file(cmd_file, sci_idx);
1581         } else {
1582                 ss_listen(sci_idx);
1583         }
1584
1585         if (current_fs)
1586                 close_filesystem();
1587
1588         return exit_status;
1589 }