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[thirdparty/e2fsprogs.git] / 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
38 extern ss_request_table debug_cmds;
39
40 ext2_filsys current_fs = NULL;
41 ino_t root, cwd;
42
43 static void open_filesystem(char *device, int open_flags)
44 {
45 int retval;
46
47 retval = ext2fs_open(device, open_flags, 0, 0,
48 unix_io_manager, &current_fs);
49 if (retval) {
50 com_err(device, retval, "while opening filesystem");
51 current_fs = NULL;
52 return;
53 }
54 retval = ext2fs_read_inode_bitmap(current_fs);
55 if (retval) {
56 com_err(device, retval, "while reading inode bitmap");
57 goto errout;
58 }
59 retval = ext2fs_read_block_bitmap(current_fs);
60 if (retval) {
61 com_err(device, retval, "while reading block bitmap");
62 goto errout;
63 }
64 root = cwd = EXT2_ROOT_INO;
65 return;
66
67 errout:
68 retval = ext2fs_close(current_fs);
69 if (retval)
70 com_err(device, retval, "while trying to close filesystem");
71 current_fs = NULL;
72 }
73
74 void do_open_filesys(int argc, char **argv)
75 {
76 const char *usage = "Usage: open [-w] <device>";
77 char c;
78 int open_flags = 0;
79
80 optind = 0;
81 #ifdef HAVE_OPTRESET
82 optreset = 1; /* Makes BSD getopt happy */
83 #endif
84 while ((c = getopt (argc, argv, "w")) != EOF) {
85 switch (c) {
86 case 'w':
87 open_flags = EXT2_FLAG_RW;
88 break;
89 default:
90 com_err(argv[0], 0, usage);
91 return;
92 }
93 }
94 if (optind != argc-1) {
95 com_err(argv[0], 0, usage);
96 return;
97 }
98 if (check_fs_not_open(argv[0]))
99 return;
100 open_filesystem(argv[optind], open_flags);
101 }
102
103 static void close_filesystem(NOARGS)
104 {
105 int retval;
106
107 if (current_fs->flags & EXT2_FLAG_IB_DIRTY) {
108 retval = ext2fs_write_inode_bitmap(current_fs);
109 if (retval)
110 com_err("ext2fs_write_inode_bitmap", retval, "");
111 }
112 if (current_fs->flags & EXT2_FLAG_BB_DIRTY) {
113 retval = ext2fs_write_block_bitmap(current_fs);
114 if (retval)
115 com_err("ext2fs_write_block_bitmap", retval, "");
116 }
117 retval = ext2fs_close(current_fs);
118 if (retval)
119 com_err("ext2fs_close", retval, "");
120 current_fs = NULL;
121 return;
122 }
123
124 void do_close_filesys(int argc, char **argv)
125 {
126 if (argc > 1) {
127 com_err(argv[0], 0, "Usage: close_filesys");
128 return;
129 }
130 if (check_fs_open(argv[0]))
131 return;
132 close_filesystem();
133 }
134
135 void do_init_filesys(int argc, char **argv)
136 {
137 const char *usage = "Usage: initialize <device> <blocksize>";
138 struct ext2_super_block param;
139 errcode_t retval;
140 char *tmp;
141
142 if (argc != 3) {
143 com_err(argv[0], 0, usage);
144 return;
145 }
146 if (check_fs_not_open(argv[0]))
147 return;
148
149 memset(&param, 0, sizeof(struct ext2_super_block));
150 param.s_blocks_count = strtoul(argv[2], &tmp, 0);
151 if (*tmp) {
152 com_err(argv[0], 0, "Bad blocks count - %s", argv[2]);
153 return;
154 }
155 retval = ext2fs_initialize(argv[1], 0, &param,
156 unix_io_manager, &current_fs);
157 if (retval) {
158 com_err(argv[1], retval, "while initializing filesystem");
159 current_fs = NULL;
160 return;
161 }
162 root = cwd = EXT2_ROOT_INO;
163 return;
164 }
165
166 void do_show_super_stats(int argc, char *argv[])
167 {
168 int i;
169 FILE *out;
170 struct ext2fs_sb *sb;
171 struct ext2_group_desc *gdp;
172 char buf[80];
173 const char *none = "(none)";
174
175 if (argc > 1) {
176 com_err(argv[0], 0, "Usage: show_super");
177 return;
178 }
179 if (check_fs_open(argv[0]))
180 return;
181 out = open_pager();
182 sb = (struct ext2fs_sb *) current_fs->super;
183 fprintf(out, "Filesystem is read-%s\n",
184 current_fs->flags & EXT2_FLAG_RW ? "write" : "only");
185 if (sb->s_volume_name[0]) {
186 memset(buf, 0, sizeof(buf));
187 strncpy(buf, sb->s_volume_name, sizeof(sb->s_volume_name));
188 } else
189 strcpy(buf, none);
190 fprintf(out, "Volume name = %s\n", buf);
191 if (sb->s_last_mounted[0]) {
192 memset(buf, 0, sizeof(buf));
193 strncpy(buf, sb->s_last_mounted, sizeof(sb->s_last_mounted));
194 } else
195 strcpy(buf, none);
196 fprintf(out, "Last mounted directory = %s\n", buf);
197 if (!uuid_is_null(sb->s_uuid))
198 uuid_unparse(sb->s_uuid, buf);
199 else
200 strcpy(buf, none);
201 fprintf(out, "Filesystem UUID = %s\n", buf);
202 fprintf(out, "Last mount time = %s", time_to_string(sb->s_mtime));
203 fprintf(out, "Last write time = %s", time_to_string(sb->s_wtime));
204 fprintf(out, "Mount counts = %d (maximal = %d)\n",
205 sb->s_mnt_count, sb->s_max_mnt_count);
206 fputs ("Filesystem OS type = ", out);
207 switch (sb->s_creator_os) {
208 case EXT2_OS_LINUX: fputs ("Linux\n", out); break;
209 case EXT2_OS_HURD: fputs ("GNU\n", out); break;
210 case EXT2_OS_MASIX: fputs ("Masix\n", out); break;
211 default: fputs ("unknown\n", out);
212 }
213 fprintf(out, "Superblock size = %d\n",
214 sizeof(struct ext2_super_block));
215 fprintf(out, "Block size = %d, fragment size = %d\n",
216 EXT2_BLOCK_SIZE(sb), EXT2_FRAG_SIZE(sb));
217 fprintf(out, "Inode size = %d\n", EXT2_INODE_SIZE(sb));
218 fprintf(out, "%d inodes, %d free\n", sb->s_inodes_count,
219 sb->s_free_inodes_count);
220 fprintf(out, "%d blocks, %d free, %d reserved, first block = %d\n",
221 sb->s_blocks_count, sb->s_free_blocks_count,
222 sb->s_r_blocks_count, sb->s_first_data_block);
223 fprintf(out, "%d blocks per group\n", sb->s_blocks_per_group);
224 fprintf(out, "%d fragments per group\n", sb->s_frags_per_group);
225 fprintf(out, "%d inodes per group\n", EXT2_INODES_PER_GROUP(sb));
226 fprintf(out, "%ld group%s (%ld descriptors block%s)\n",
227 current_fs->group_desc_count,
228 (current_fs->group_desc_count != 1) ? "s" : "",
229 current_fs->desc_blocks,
230 (current_fs->desc_blocks != 1) ? "s" : "");
231
232 gdp = &current_fs->group_desc[0];
233 for (i = 0; i < current_fs->group_desc_count; i++, gdp++)
234 fprintf(out, " Group %2d: block bitmap at %d, "
235 "inode bitmap at %d, "
236 "inode table at %d\n"
237 " %d free block%s, "
238 "%d free inode%s, "
239 "%d used director%s\n",
240 i, gdp->bg_block_bitmap,
241 gdp->bg_inode_bitmap, gdp->bg_inode_table,
242 gdp->bg_free_blocks_count,
243 gdp->bg_free_blocks_count != 1 ? "s" : "",
244 gdp->bg_free_inodes_count,
245 gdp->bg_free_inodes_count != 1 ? "s" : "",
246 gdp->bg_used_dirs_count,
247 gdp->bg_used_dirs_count != 1 ? "ies" : "y");
248 close_pager(out);
249 }
250
251 void do_dirty_filesys(int argc, char *argv[])
252 {
253 if (check_fs_open(argv[0]))
254 return;
255
256 ext2fs_mark_super_dirty(current_fs);
257 }
258
259 struct list_blocks_struct {
260 FILE *f;
261 int total;
262 };
263
264 static int list_blocks_proc(ext2_filsys fs, blk_t *blocknr, int blockcnt,
265 void *private)
266 {
267 struct list_blocks_struct *lb = (struct list_blocks_struct *) private;
268
269 fprintf(lb->f, "%d ", *blocknr);
270 lb->total++;
271 return 0;
272 }
273
274
275 static void dump_blocks(FILE *f, ino_t inode)
276 {
277 struct list_blocks_struct lb;
278
279 fprintf(f, "BLOCKS:\n");
280 lb.total = 0;
281 lb.f = f;
282 ext2fs_block_iterate(current_fs, inode, 0, NULL,
283 list_blocks_proc, (void *)&lb);
284 if (lb.total)
285 fprintf(f, "\nTOTAL: %d\n", lb.total);
286 fprintf(f,"\n");
287 }
288
289
290 static void dump_inode(ino_t inode_num, struct ext2_inode inode)
291 {
292 const char *i_type;
293 FILE *out;
294 char frag, fsize;
295 int os = current_fs->super->s_creator_os;
296
297 out = open_pager();
298 if (LINUX_S_ISDIR(inode.i_mode)) i_type = "directory";
299 else if (LINUX_S_ISREG(inode.i_mode)) i_type = "regular";
300 else if (LINUX_S_ISLNK(inode.i_mode)) i_type = "symlink";
301 else if (LINUX_S_ISBLK(inode.i_mode)) i_type = "block special";
302 else if (LINUX_S_ISCHR(inode.i_mode)) i_type = "character special";
303 else if (LINUX_S_ISFIFO(inode.i_mode)) i_type = "FIFO";
304 else if (LINUX_S_ISSOCK(inode.i_mode)) i_type = "socket";
305 else i_type = "bad type";
306 fprintf(out, "Inode: %ld Type: %s ", inode_num, i_type);
307 fprintf(out, "Mode: %04o Flags: 0x%x Version: %d\n",
308 inode.i_mode & 0777, inode.i_flags, inode.i_version);
309 fprintf(out, "User: %5d Group: %5d Size: %d\n",
310 inode.i_uid, inode.i_gid, inode.i_size);
311 if (current_fs->super->s_creator_os == EXT2_OS_HURD)
312 fprintf(out,
313 "File ACL: %d Directory ACL: %d Translator: %d\n",
314 inode.i_file_acl, inode.i_dir_acl,
315 inode.osd1.hurd1.h_i_translator);
316 else
317 fprintf(out, "File ACL: %d Directory ACL: %d\n",
318 inode.i_file_acl, inode.i_dir_acl);
319 fprintf(out, "Links: %d Blockcount: %d\n", inode.i_links_count,
320 inode.i_blocks);
321 switch (os) {
322 case EXT2_OS_LINUX:
323 frag = inode.osd2.linux2.l_i_frag;
324 fsize = inode.osd2.linux2.l_i_fsize;
325 break;
326 case EXT2_OS_HURD:
327 frag = inode.osd2.hurd2.h_i_frag;
328 fsize = inode.osd2.hurd2.h_i_fsize;
329 break;
330 case EXT2_OS_MASIX:
331 frag = inode.osd2.masix2.m_i_frag;
332 fsize = inode.osd2.masix2.m_i_fsize;
333 break;
334 default:
335 frag = fsize = 0;
336 }
337 fprintf(out, "Fragment: Address: %d Number: %d Size: %d\n",
338 inode.i_faddr, frag, fsize);
339 fprintf(out, "ctime: 0x%08x -- %s", inode.i_ctime,
340 time_to_string(inode.i_ctime));
341 fprintf(out, "atime: 0x%08x -- %s", inode.i_atime,
342 time_to_string(inode.i_atime));
343 fprintf(out, "mtime: 0x%08x -- %s", inode.i_mtime,
344 time_to_string(inode.i_mtime));
345 if (inode.i_dtime)
346 fprintf(out, "dtime: 0x%08x -- %s", inode.i_dtime,
347 time_to_string(inode.i_dtime));
348 if (LINUX_S_ISLNK(inode.i_mode) && inode.i_blocks == 0)
349 fprintf(out, "Fast_link_dest: %s\n", (char *)inode.i_block);
350 else
351 dump_blocks(out, inode_num);
352 close_pager(out);
353 }
354
355
356 void do_stat(int argc, char *argv[])
357 {
358 ino_t inode;
359 struct ext2_inode inode_buf;
360 int retval;
361
362 if (argc != 2) {
363 com_err(argv[0], 0, "Usage: stat <file>");
364 return;
365 }
366 if (check_fs_open(argv[0]))
367 return;
368 inode = string_to_inode(argv[1]);
369 if (!inode)
370 return;
371
372 retval = ext2fs_read_inode(current_fs, inode, &inode_buf);
373 if (retval)
374 {
375 com_err(argv[0], 0, "Reading inode");
376 return;
377 }
378
379 dump_inode(inode,inode_buf);
380 return;
381 }
382
383 void do_chroot(int argc, char *argv[])
384 {
385 ino_t inode;
386 int retval;
387
388 if (argc != 2) {
389 com_err(argv[0], 0, "Usage: chroot <file>");
390 return;
391 }
392 if (check_fs_open(argv[0]))
393 return;
394 inode = string_to_inode(argv[1]);
395 if (!inode)
396 return;
397
398 retval = ext2fs_check_directory(current_fs, inode);
399 if (retval) {
400 com_err(argv[1], retval, "");
401 return;
402 }
403 root = inode;
404 }
405
406 void do_clri(int argc, char *argv[])
407 {
408 ino_t inode;
409 int retval;
410 struct ext2_inode inode_buf;
411
412 if (argc != 2) {
413 com_err(argv[0], 0, "Usage: clri <file>");
414 return;
415 }
416 if (check_fs_open(argv[0]))
417 return;
418 if (check_fs_read_write(argv[0]))
419 return;
420 inode = string_to_inode(argv[1]);
421 if (!inode)
422 return;
423
424 retval = ext2fs_read_inode(current_fs, inode, &inode_buf);
425 if (retval) {
426 com_err(argv[0], 0, "while trying to read inode %d", inode);
427 return;
428 }
429 memset(&inode_buf, 0, sizeof(inode_buf));
430 retval = ext2fs_write_inode(current_fs, inode, &inode_buf);
431 if (retval) {
432 com_err(argv[0], retval, "while trying to write inode %d",
433 inode);
434 return;
435 }
436 }
437
438 void do_freei(int argc, char *argv[])
439 {
440 ino_t inode;
441
442 if (argc != 2) {
443 com_err(argv[0], 0, "Usage: freei <file>");
444 return;
445 }
446 if (check_fs_open(argv[0]))
447 return;
448 if (check_fs_read_write(argv[0]))
449 return;
450 inode = string_to_inode(argv[1]);
451 if (!inode)
452 return;
453
454 if (!ext2fs_test_inode_bitmap(current_fs->inode_map,inode))
455 com_err(argv[0], 0, "Warning: inode already clear");
456 ext2fs_unmark_inode_bitmap(current_fs->inode_map,inode);
457 ext2fs_mark_ib_dirty(current_fs);
458 }
459
460 void do_seti(int argc, char *argv[])
461 {
462 ino_t inode;
463
464 if (argc != 2) {
465 com_err(argv[0], 0, "Usage: seti <file>");
466 return;
467 }
468 if (check_fs_open(argv[0]))
469 return;
470 if (check_fs_read_write(argv[0]))
471 return;
472 inode = string_to_inode(argv[1]);
473 if (!inode)
474 return;
475
476 if (ext2fs_test_inode_bitmap(current_fs->inode_map,inode))
477 com_err(argv[0], 0, "Warning: inode already set");
478 ext2fs_mark_inode_bitmap(current_fs->inode_map,inode);
479 ext2fs_mark_ib_dirty(current_fs);
480 }
481
482 void do_testi(int argc, char *argv[])
483 {
484 ino_t inode;
485
486 if (argc != 2) {
487 com_err(argv[0], 0, "Usage: testi <file>");
488 return;
489 }
490 if (check_fs_open(argv[0]))
491 return;
492 inode = string_to_inode(argv[1]);
493 if (!inode)
494 return;
495
496 if (ext2fs_test_inode_bitmap(current_fs->inode_map,inode))
497 printf("Inode %ld is marked in use\n", inode);
498 else
499 printf("Inode %ld is not in use\n", inode);
500 }
501
502
503 void do_freeb(int argc, char *argv[])
504 {
505 blk_t block;
506 char *tmp;
507
508 if (argc != 2) {
509 com_err(argv[0], 0, "Usage: freeb <block>");
510 return;
511 }
512 if (check_fs_open(argv[0]))
513 return;
514 if (check_fs_read_write(argv[0]))
515 return;
516 block = strtoul(argv[1], &tmp, 0);
517 if (!block || *tmp) {
518 com_err(argv[0], 0, "No block 0");
519 return;
520 }
521 if (!ext2fs_test_block_bitmap(current_fs->block_map,block))
522 com_err(argv[0], 0, "Warning: block already clear");
523 ext2fs_unmark_block_bitmap(current_fs->block_map,block);
524 ext2fs_mark_bb_dirty(current_fs);
525 }
526
527 void do_setb(int argc, char *argv[])
528 {
529 blk_t block;
530 char *tmp;
531
532 if (argc != 2) {
533 com_err(argv[0], 0, "Usage: setb <block>");
534 return;
535 }
536 if (check_fs_open(argv[0]))
537 return;
538 if (check_fs_read_write(argv[0]))
539 return;
540 block = strtoul(argv[1], &tmp, 0);
541 if (!block || *tmp) {
542 com_err(argv[0], 0, "No block 0");
543 return;
544 }
545 if (ext2fs_test_block_bitmap(current_fs->block_map,block))
546 com_err(argv[0], 0, "Warning: block already set");
547 ext2fs_mark_block_bitmap(current_fs->block_map,block);
548 ext2fs_mark_bb_dirty(current_fs);
549 }
550
551 void do_testb(int argc, char *argv[])
552 {
553 blk_t block;
554 char *tmp;
555
556 if (argc != 2) {
557 com_err(argv[0], 0, "Usage: testb <block>");
558 return;
559 }
560 if (check_fs_open(argv[0]))
561 return;
562 block = strtoul(argv[1], &tmp, 0);
563 if (!block || *tmp) {
564 com_err(argv[0], 0, "No block 0");
565 return;
566 }
567 if (ext2fs_test_block_bitmap(current_fs->block_map,block))
568 printf("Block %d marked in use\n", block);
569 else printf("Block %d not in use\n", block);
570 }
571
572 static void modify_u8(char *com, const char *prompt,
573 const char *format, __u8 *val)
574 {
575 char buf[200];
576 unsigned long v;
577 char *tmp;
578
579 sprintf(buf, format, *val);
580 printf("%30s [%s] ", prompt, buf);
581 fgets(buf, sizeof(buf), stdin);
582 if (buf[strlen (buf) - 1] == '\n')
583 buf[strlen (buf) - 1] = '\0';
584 if (!buf[0])
585 return;
586 v = strtoul(buf, &tmp, 0);
587 if (*tmp)
588 com_err(com, 0, "Bad value - %s", buf);
589 else
590 *val = v;
591 }
592
593 static void modify_u16(char *com, const char *prompt,
594 const char *format, __u16 *val)
595 {
596 char buf[200];
597 unsigned long v;
598 char *tmp;
599
600 sprintf(buf, format, *val);
601 printf("%30s [%s] ", prompt, buf);
602 fgets(buf, sizeof(buf), stdin);
603 if (buf[strlen (buf) - 1] == '\n')
604 buf[strlen (buf) - 1] = '\0';
605 if (!buf[0])
606 return;
607 v = strtoul(buf, &tmp, 0);
608 if (*tmp)
609 com_err(com, 0, "Bad value - %s", buf);
610 else
611 *val = v;
612 }
613
614 static void modify_u32(char *com, const char *prompt,
615 const char *format, __u32 *val)
616 {
617 char buf[200];
618 unsigned long v;
619 char *tmp;
620
621 sprintf(buf, format, *val);
622 printf("%30s [%s] ", prompt, buf);
623 fgets(buf, sizeof(buf), stdin);
624 if (buf[strlen (buf) - 1] == '\n')
625 buf[strlen (buf) - 1] = '\0';
626 if (!buf[0])
627 return;
628 v = strtoul(buf, &tmp, 0);
629 if (*tmp)
630 com_err(com, 0, "Bad value - %s", buf);
631 else
632 *val = v;
633 }
634
635
636 void do_modify_inode(int argc, char *argv[])
637 {
638 struct ext2_inode inode;
639 ino_t inode_num;
640 int i;
641 errcode_t retval;
642 unsigned char *frag, *fsize;
643 char buf[80];
644 int os = current_fs->super->s_creator_os;
645 const char *hex_format = "0x%x";
646 const char *octal_format = "0%o";
647 const char *decimal_format = "%d";
648
649 if (argc != 2) {
650 com_err(argv[0], 0, "Usage: modify_inode <file>");
651 return;
652 }
653 if (check_fs_open(argv[0]))
654 return;
655 if (check_fs_read_write(argv[0]))
656 return;
657
658 inode_num = string_to_inode(argv[1]);
659 if (!inode_num)
660 return;
661
662 retval = ext2fs_read_inode(current_fs, inode_num, &inode);
663 if (retval) {
664 com_err(argv[1], retval, "while trying to read inode %d",
665 inode_num);
666 return;
667 }
668
669 modify_u16(argv[0], "Mode", octal_format, &inode.i_mode);
670 modify_u16(argv[0], "User ID", decimal_format, &inode.i_uid);
671 modify_u16(argv[0], "Group ID", decimal_format, &inode.i_gid);
672 modify_u32(argv[0], "Size", decimal_format, &inode.i_size);
673 modify_u32(argv[0], "Creation time", decimal_format, &inode.i_ctime);
674 modify_u32(argv[0], "Modification time", decimal_format, &inode.i_mtime);
675 modify_u32(argv[0], "Access time", decimal_format, &inode.i_atime);
676 modify_u32(argv[0], "Deletion time", decimal_format, &inode.i_dtime);
677 modify_u16(argv[0], "Link count", decimal_format, &inode.i_links_count);
678 modify_u32(argv[0], "Block count", decimal_format, &inode.i_blocks);
679 modify_u32(argv[0], "File flags", hex_format, &inode.i_flags);
680 #if 0
681 modify_u32(argv[0], "Reserved1", decimal_format, &inode.i_reserved1);
682 #endif
683 modify_u32(argv[0], "File acl", decimal_format, &inode.i_file_acl);
684 modify_u32(argv[0], "Directory acl", decimal_format, &inode.i_dir_acl);
685
686 if (current_fs->super->s_creator_os == EXT2_OS_HURD)
687 modify_u32(argv[0], "Translator Block",
688 decimal_format, &inode.osd1.hurd1.h_i_translator);
689
690 modify_u32(argv[0], "Fragment address", decimal_format, &inode.i_faddr);
691 switch (os) {
692 case EXT2_OS_LINUX:
693 frag = &inode.osd2.linux2.l_i_frag;
694 fsize = &inode.osd2.linux2.l_i_fsize;
695 break;
696 case EXT2_OS_HURD:
697 frag = &inode.osd2.hurd2.h_i_frag;
698 fsize = &inode.osd2.hurd2.h_i_fsize;
699 break;
700 case EXT2_OS_MASIX:
701 frag = &inode.osd2.masix2.m_i_frag;
702 fsize = &inode.osd2.masix2.m_i_fsize;
703 break;
704 default:
705 frag = fsize = 0;
706 }
707 if (frag)
708 modify_u8(argv[0], "Fragment number", decimal_format, frag);
709 if (fsize)
710 modify_u8(argv[0], "Fragment size", decimal_format, fsize);
711
712 for (i=0; i < EXT2_NDIR_BLOCKS; i++) {
713 sprintf(buf, "Direct Block #%d", i);
714 modify_u32(argv[0], buf, decimal_format, &inode.i_block[i]);
715 }
716 modify_u32(argv[0], "Indirect Block", decimal_format,
717 &inode.i_block[EXT2_IND_BLOCK]);
718 modify_u32(argv[0], "Double Indirect Block", decimal_format,
719 &inode.i_block[EXT2_DIND_BLOCK]);
720 modify_u32(argv[0], "Triple Indirect Block", decimal_format,
721 &inode.i_block[EXT2_TIND_BLOCK]);
722 retval = ext2fs_write_inode(current_fs, inode_num, &inode);
723 if (retval) {
724 com_err(argv[1], retval, "while trying to write inode %d",
725 inode_num);
726 return;
727 }
728 }
729
730 void do_change_working_dir(int argc, char *argv[])
731 {
732 ino_t inode;
733 int retval;
734
735 if (argc != 2) {
736 com_err(argv[0], 0, "Usage: cd <file>");
737 return;
738 }
739 if (check_fs_open(argv[0]))
740 return;
741
742 inode = string_to_inode(argv[1]);
743 if (!inode)
744 return;
745
746 retval = ext2fs_check_directory(current_fs, inode);
747 if (retval) {
748 com_err(argv[1], retval, "");
749 return;
750 }
751 cwd = inode;
752 return;
753 }
754
755 void do_print_working_directory(int argc, char *argv[])
756 {
757 int retval;
758 char *pathname = NULL;
759
760 if (argc > 1) {
761 com_err(argv[0], 0, "Usage: print_working_directory");
762 return;
763 }
764 if (check_fs_open(argv[0]))
765 return;
766
767 retval = ext2fs_get_pathname(current_fs, cwd, 0, &pathname);
768 if (retval) {
769 com_err(argv[0], retval,
770 "while trying to get pathname of cwd");
771 }
772 printf("[pwd] INODE: %6ld PATH: %s\n", cwd, pathname);
773 free(pathname);
774 retval = ext2fs_get_pathname(current_fs, root, 0, &pathname);
775 if (retval) {
776 com_err(argv[0], retval,
777 "while trying to get pathname of root");
778 }
779 printf("[root] INODE: %6ld PATH: %s\n", root, pathname);
780 free(pathname);
781 return;
782 }
783
784 static void make_link(char *sourcename, char *destname)
785 {
786 ino_t inode;
787 int retval;
788 ino_t dir;
789 char *dest, *cp, *basename;
790
791 /*
792 * Get the source inode
793 */
794 inode = string_to_inode(sourcename);
795 if (!inode)
796 return;
797 basename = strrchr(sourcename, '/');
798 if (basename)
799 basename++;
800 else
801 basename = sourcename;
802 /*
803 * Figure out the destination. First see if it exists and is
804 * a directory.
805 */
806 if (! (retval=ext2fs_namei(current_fs, root, cwd, destname, &dir)))
807 dest = basename;
808 else {
809 /*
810 * OK, it doesn't exist. See if it is
811 * '<dir>/basename' or 'basename'
812 */
813 cp = strrchr(destname, '/');
814 if (cp) {
815 *cp = 0;
816 dir = string_to_inode(destname);
817 if (!dir)
818 return;
819 dest = cp+1;
820 } else {
821 dir = cwd;
822 dest = destname;
823 }
824 }
825
826 retval = ext2fs_link(current_fs, dir, dest, inode, 0);
827 if (retval)
828 com_err("make_link", retval, "");
829 return;
830 }
831
832
833 void do_link(int argc, char *argv[])
834 {
835 if (argc != 3) {
836 com_err(argv[0], 0, "Usage: link <source_file> <dest_name>");
837 return;
838 }
839 if (check_fs_open(argv[0]))
840 return;
841
842 make_link(argv[1], argv[2]);
843 }
844
845 static void unlink_file_by_name(char *filename)
846 {
847 int retval;
848 ino_t dir;
849 char *basename;
850
851 basename = strrchr(filename, '/');
852 if (basename) {
853 *basename++ = '\0';
854 dir = string_to_inode(filename);
855 if (!dir)
856 return;
857 } else {
858 dir = cwd;
859 basename = filename;
860 }
861 retval = ext2fs_unlink(current_fs, dir, basename, 0, 0);
862 if (retval)
863 com_err("unlink_file_by_name", retval, "");
864 return;
865 }
866
867 void do_unlink(int argc, char *argv[])
868 {
869 if (argc != 2) {
870 com_err(argv[0], 0, "Usage: unlink <pathname>");
871 return;
872 }
873 if (check_fs_open(argv[0]))
874 return;
875
876 unlink_file_by_name(argv[1]);
877 }
878
879 void do_find_free_block(int argc, char *argv[])
880 {
881 blk_t free_blk, goal;
882 errcode_t retval;
883 char *tmp;
884
885 if ((argc > 2) || (argc==2 && *argv[1] == '?')) {
886 com_err(argv[0], 0, "Usage: find_free_block [goal]");
887 return;
888 }
889 if (check_fs_open(argv[0]))
890 return;
891
892 if (argc > 1) {
893 goal = strtol(argv[1], &tmp, 0);
894 if (*tmp) {
895 com_err(argv[0], 0, "Bad goal - %s", argv[1]);
896 return;
897 }
898 }
899 else
900 goal = current_fs->super->s_first_data_block;
901
902 retval = ext2fs_new_block(current_fs, goal, 0, &free_blk);
903 if (retval)
904 com_err("ext2fs_new_block", retval, "");
905 else
906 printf("Free block found: %d\n", free_blk);
907
908 }
909
910 void do_find_free_inode(int argc, char *argv[])
911 {
912 ino_t free_inode, dir;
913 int mode;
914 int retval;
915 char *tmp;
916
917 if (argc > 3 || (argc>1 && *argv[1] == '?')) {
918 com_err(argv[0], 0, "Usage: find_free_inode [dir] [mode]");
919 return;
920 }
921 if (check_fs_open(argv[0]))
922 return;
923
924 if (argc > 1) {
925 dir = strtol(argv[1], &tmp, 0);
926 if (*tmp) {
927 com_err(argv[0], 0, "Bad dir - %s", argv[1]);
928 return;
929 }
930 }
931 else
932 dir = root;
933 if (argc > 2) {
934 mode = strtol(argv[2], &tmp, 0);
935 if (*tmp) {
936 com_err(argv[0], 0, "Bad mode - %s", argv[2]);
937 return;
938 }
939 } else
940 mode = 010755;
941
942 retval = ext2fs_new_inode(current_fs, dir, mode, 0, &free_inode);
943 if (retval)
944 com_err("ext2fs_new_inode", retval, "");
945 else
946 printf("Free inode found: %ld\n", free_inode);
947 }
948
949 struct copy_file_struct {
950 unsigned long size;
951 int done, fd, blocks;
952 errcode_t err;
953 };
954
955 static int copy_file_proc(ext2_filsys to_fs,
956 blk_t *blocknr,
957 int blockcnt,
958 void *private)
959 {
960 struct copy_file_struct *cs = (struct copy_file_struct *) private;
961 blk_t new_blk;
962 static blk_t last_blk = 0;
963 char *block;
964 errcode_t retval;
965 int group;
966 int nr;
967
968 if (*blocknr) {
969 new_blk = *blocknr;
970 } else {
971 retval = ext2fs_new_block(to_fs, last_blk, 0, &new_blk);
972 if (retval) {
973 cs->err = retval;
974 return BLOCK_ABORT;
975 }
976 }
977 last_blk = new_blk;
978 block = malloc(to_fs->blocksize);
979 if (!block) {
980 cs->err = ENOMEM;
981 return BLOCK_ABORT;
982 }
983 if (blockcnt >= 0) {
984 nr = read(cs->fd, block, to_fs->blocksize);
985 } else {
986 nr = to_fs->blocksize;
987 memset(block, 0, nr);
988 }
989 if (nr == 0) {
990 cs->done = 1;
991 return BLOCK_ABORT;
992 }
993 if (nr < 0) {
994 cs->err = nr;
995 return BLOCK_ABORT;
996 }
997 retval = io_channel_write_blk(to_fs->io, new_blk, 1, block);
998 if (retval) {
999 cs->err = retval;
1000 return BLOCK_ABORT;
1001 }
1002 free(block);
1003 if (blockcnt >= 0)
1004 cs->size += nr;
1005 cs->blocks += to_fs->blocksize / 512;
1006 printf("%ld(%d) ", cs->size, blockcnt);
1007 fflush(stdout);
1008 if (nr < to_fs->blocksize) {
1009 cs->done = 1;
1010 printf("\n");
1011 }
1012 *blocknr = new_blk;
1013 ext2fs_mark_block_bitmap(to_fs->block_map, new_blk);
1014 ext2fs_mark_bb_dirty(to_fs);
1015 group = ext2fs_group_of_blk(to_fs, new_blk);
1016 to_fs->group_desc[group].bg_free_blocks_count--;
1017 to_fs->super->s_free_blocks_count--;
1018 ext2fs_mark_super_dirty(to_fs);
1019 if (cs->done)
1020 return (BLOCK_CHANGED | BLOCK_ABORT);
1021 else
1022 return BLOCK_CHANGED;
1023 }
1024
1025 static errcode_t copy_file(int fd, ino_t newfile)
1026 {
1027 errcode_t retval;
1028 struct copy_file_struct cs;
1029 struct ext2_inode inode;
1030
1031 cs.fd = fd;
1032 cs.done = 0;
1033 cs.err = 0;
1034 cs.size = 0;
1035 cs.blocks = 0;
1036
1037 retval = ext2fs_block_iterate(current_fs, newfile,
1038 BLOCK_FLAG_APPEND,
1039 0, copy_file_proc, &cs);
1040
1041 if (cs.err)
1042 return cs.err;
1043 if (!cs.done)
1044 return EXT2_ET_EXPAND_DIR_ERR;
1045
1046 /*
1047 * Update the size and block count fields in the inode.
1048 */
1049 retval = ext2fs_read_inode(current_fs, newfile, &inode);
1050 if (retval)
1051 return retval;
1052
1053 inode.i_blocks += cs.blocks;
1054
1055 retval = ext2fs_write_inode(current_fs, newfile, &inode);
1056 if (retval)
1057 return retval;
1058
1059 return 0;
1060 }
1061
1062 void do_write(int argc, char *argv[])
1063 {
1064 int fd;
1065 struct stat statbuf;
1066 ino_t newfile;
1067 errcode_t retval;
1068 struct ext2_inode inode;
1069
1070 if (check_fs_open(argv[0]))
1071 return;
1072 if (argc != 3) {
1073 com_err(argv[0], 0, "Usage: write <nativefile> <newfile>");
1074 return;
1075 }
1076 if (check_fs_read_write(argv[0]))
1077 return;
1078 fd = open(argv[1], O_RDONLY);
1079 if (fd < 0) {
1080 com_err(argv[1], fd, "");
1081 return;
1082 }
1083 if (fstat(fd, &statbuf) < 0) {
1084 com_err(argv[1], errno, "");
1085 close(fd);
1086 return;
1087 }
1088
1089 retval = ext2fs_new_inode(current_fs, cwd, 010755, 0, &newfile);
1090 if (retval) {
1091 com_err(argv[0], retval, "");
1092 close(fd);
1093 return;
1094 }
1095 printf("Allocated inode: %ld\n", newfile);
1096 retval = ext2fs_link(current_fs, cwd, argv[2], newfile, 0);
1097 if (retval) {
1098 com_err(argv[2], retval, "");
1099 close(fd);
1100 return;
1101 }
1102 if (ext2fs_test_inode_bitmap(current_fs->inode_map,newfile))
1103 com_err(argv[0], 0, "Warning: inode already set");
1104 ext2fs_mark_inode_bitmap(current_fs->inode_map,newfile);
1105 ext2fs_mark_ib_dirty(current_fs);
1106 memset(&inode, 0, sizeof(inode));
1107 inode.i_mode = statbuf.st_mode;
1108 inode.i_atime = inode.i_ctime = inode.i_mtime = time(NULL);
1109 inode.i_links_count = 1;
1110 inode.i_size = statbuf.st_size;
1111 ext2fs_write_inode(current_fs, newfile, &inode);
1112 retval = ext2fs_write_inode(current_fs, newfile, &inode);
1113 if (retval) {
1114 com_err(argv[0], retval, "while trying to write inode %d",
1115 inode);
1116 close(fd);
1117 return;
1118 }
1119 if (LINUX_S_ISREG(inode.i_mode)) {
1120 retval = copy_file(fd, newfile);
1121 if (retval)
1122 com_err("copy_file", retval, "");
1123 }
1124 close(fd);
1125 }
1126
1127 void do_mknod(int argc, char *argv[])
1128 {
1129 unsigned long mode, major, minor, nr;
1130 ino_t newfile;
1131 errcode_t retval;
1132 struct ext2_inode inode;
1133
1134 if (check_fs_open(argv[0]))
1135 return;
1136 if (argc < 3 || argv[2][1]) {
1137 com_err(argv[0], 0, "Usage: mknod <name> [p| [c|b] <major> <minor>]");
1138 return;
1139 }
1140 mode = minor = major = 0;
1141 switch (argv[2][0]) {
1142 case 'p':
1143 mode = LINUX_S_IFIFO;
1144 nr = 3;
1145 break;
1146 case 'c':
1147 mode = LINUX_S_IFCHR;
1148 nr = 5;
1149 break;
1150 case 'b':
1151 mode = LINUX_S_IFBLK;
1152 nr = 5;
1153 break;
1154 default:
1155 nr = 0;
1156 }
1157 if (nr == 5) {
1158 major = strtoul(argv[3], argv+3, 0);
1159 minor = strtoul(argv[4], argv+4, 0);
1160 if (major > 255 || minor > 255 || argv[3][0] || argv[4][0])
1161 nr = 0;
1162 }
1163 if (argc != nr) {
1164 com_err(argv[0], 0, "Usage: mknod <name> [p| [c|b] <major> <minor>]");
1165 return;
1166 }
1167 if (check_fs_read_write(argv[0]))
1168 return;
1169 retval = ext2fs_new_inode(current_fs, cwd, 010755, 0, &newfile);
1170 if (retval) {
1171 com_err(argv[0], retval, "");
1172 return;
1173 }
1174 printf("Allocated inode: %ld\n", newfile);
1175 retval = ext2fs_link(current_fs, cwd, argv[1], newfile, 0);
1176 if (retval) {
1177 if (retval == EXT2_ET_DIR_NO_SPACE) {
1178 retval = ext2fs_expand_dir(current_fs, cwd);
1179 if (!retval)
1180 retval = ext2fs_link(current_fs, cwd,
1181 argv[1], newfile, 0);
1182 }
1183 if (retval) {
1184 com_err(argv[1], retval, "");
1185 return;
1186 }
1187 }
1188 if (ext2fs_test_inode_bitmap(current_fs->inode_map,newfile))
1189 com_err(argv[0], 0, "Warning: inode already set");
1190 ext2fs_mark_inode_bitmap(current_fs->inode_map, newfile);
1191 ext2fs_mark_ib_dirty(current_fs);
1192 memset(&inode, 0, sizeof(inode));
1193 inode.i_mode = mode;
1194 inode.i_atime = inode.i_ctime = inode.i_mtime = time(NULL);
1195 inode.i_block[0] = major*256+minor;
1196 inode.i_links_count = 1;
1197 ext2fs_write_inode(current_fs, newfile, &inode);
1198 retval = ext2fs_write_inode(current_fs, newfile, &inode);
1199 if (retval) {
1200 com_err(argv[0], retval, "while trying to write inode %d", inode);
1201 return;
1202 }
1203 }
1204
1205 void do_mkdir(int argc, char *argv[])
1206 {
1207 char *cp;
1208 ino_t parent;
1209 char *name;
1210 errcode_t retval;
1211
1212 if (check_fs_open(argv[0]))
1213 return;
1214
1215 if (argc != 2) {
1216 com_err(argv[0], 0, "Usage: mkdir <file>");
1217 return;
1218 }
1219
1220 cp = strrchr(argv[1], '/');
1221 if (cp) {
1222 *cp = 0;
1223 parent = string_to_inode(argv[1]);
1224 if (!parent) {
1225 com_err(argv[1], ENOENT, "");
1226 return;
1227 }
1228 name = cp+1;
1229 } else {
1230 parent = cwd;
1231 name = argv[1];
1232 }
1233
1234
1235 retval = ext2fs_mkdir(current_fs, parent, 0, name);
1236 if (retval) {
1237 com_err("ext2fs_mkdir", retval, "");
1238 return;
1239 }
1240
1241 }
1242
1243 void do_rmdir(int argc, char *argv[])
1244 {
1245 printf("Unimplemented\n");
1246 }
1247
1248
1249 static int release_blocks_proc(ext2_filsys fs, blk_t *blocknr,
1250 int blockcnt, void *private)
1251 {
1252 printf("%d ", *blocknr);
1253 ext2fs_unmark_block_bitmap(fs->block_map,*blocknr);
1254 return 0;
1255 }
1256
1257 static void kill_file_by_inode(ino_t inode)
1258 {
1259 struct ext2_inode inode_buf;
1260
1261 ext2fs_read_inode(current_fs, inode, &inode_buf);
1262 inode_buf.i_dtime = time(NULL);
1263 ext2fs_write_inode(current_fs, inode, &inode_buf);
1264
1265 printf("Kill file by inode %ld\n", inode);
1266 ext2fs_block_iterate(current_fs, inode, 0, NULL,
1267 release_blocks_proc, NULL);
1268 printf("\n");
1269 ext2fs_unmark_inode_bitmap(current_fs->inode_map, inode);
1270
1271 ext2fs_mark_bb_dirty(current_fs);
1272 ext2fs_mark_ib_dirty(current_fs);
1273 }
1274
1275
1276 void do_kill_file(int argc, char *argv[])
1277 {
1278 ino_t inode_num;
1279
1280 if (argc != 2) {
1281 com_err(argv[0], 0, "Usage: kill_file <file>");
1282 return;
1283 }
1284 if (check_fs_open(argv[0]))
1285 return;
1286
1287 inode_num = string_to_inode(argv[1]);
1288 if (!inode_num) {
1289 com_err(argv[0], 0, "Cannot find file");
1290 return;
1291 }
1292 kill_file_by_inode(inode_num);
1293 }
1294
1295 void do_rm(int argc, char *argv[])
1296 {
1297 int retval;
1298 ino_t inode_num;
1299 struct ext2_inode inode;
1300
1301 if (argc != 2) {
1302 com_err(argv[0], 0, "Usage: rm <filename>");
1303 return;
1304 }
1305 if (check_fs_open(argv[0]))
1306 return;
1307
1308 retval = ext2fs_namei(current_fs, root, cwd, argv[1], &inode_num);
1309 if (retval) {
1310 com_err(argv[0], 0, "Cannot find file");
1311 return;
1312 }
1313
1314 retval = ext2fs_read_inode(current_fs,inode_num,&inode);
1315 if (retval) {
1316 com_err(argv[0], retval, "while reading file's inode");
1317 return;
1318 }
1319
1320 if (LINUX_S_ISDIR(inode.i_mode)) {
1321 com_err(argv[0], 0, "file is a directory");
1322 return;
1323 }
1324
1325 --inode.i_links_count;
1326 retval = ext2fs_write_inode(current_fs,inode_num,&inode);
1327 if (retval) {
1328 com_err(argv[0], retval, "while writing inode");
1329 return;
1330 }
1331
1332 unlink_file_by_name(argv[1]);
1333 if (inode.i_links_count == 0)
1334 kill_file_by_inode(inode_num);
1335 }
1336
1337 void do_show_debugfs_params(int argc, char *argv[])
1338 {
1339 FILE *out = stdout;
1340
1341 if (current_fs)
1342 fprintf(out, "Open mode: read-%s\n",
1343 current_fs->flags & EXT2_FLAG_RW ? "write" : "only");
1344 fprintf(out, "Filesystem in use: %s\n",
1345 current_fs ? current_fs->device_name : "--none--");
1346 }
1347
1348 void do_expand_dir(int argc, char *argv[])
1349 {
1350 ino_t inode;
1351 int retval;
1352
1353 if (argc != 2) {
1354 com_err(argv[0], 0, "Usage: expand_dir <file>");
1355 return;
1356 }
1357 if (check_fs_open(argv[0]))
1358 return;
1359 inode = string_to_inode(argv[1]);
1360 if (!inode)
1361 return;
1362
1363 retval = ext2fs_expand_dir(current_fs, inode);
1364 if (retval)
1365 com_err("ext2fs_expand_dir", retval, "");
1366 return;
1367 }
1368
1369 static int source_file(const char *cmd_file, int sci_idx)
1370 {
1371 FILE *f;
1372 char buf[256];
1373 char *cp;
1374 int exit_status = 0;
1375 int retval;
1376
1377 if (strcmp(cmd_file, "-") == 0)
1378 f = stdin;
1379 else {
1380 f = fopen(cmd_file, "r");
1381 if (!f) {
1382 perror(cmd_file);
1383 exit(1);
1384 }
1385 }
1386 setbuf(stdout, NULL);
1387 setbuf(stderr, NULL);
1388 while (!feof(f)) {
1389 if (fgets(buf, sizeof(buf), f) == NULL)
1390 break;
1391 cp = strchr(buf, '\n');
1392 if (cp)
1393 *cp = 0;
1394 cp = strchr(buf, '\r');
1395 if (cp)
1396 *cp = 0;
1397 printf("debugfs: %s\n", buf);
1398 retval = ss_execute_line(sci_idx, buf);
1399 if (retval) {
1400 ss_perror(sci_idx, retval, buf);
1401 exit_status++;
1402 }
1403 }
1404 return exit_status;
1405 }
1406
1407 void main(int argc, char **argv)
1408 {
1409 int retval;
1410 int sci_idx;
1411 const char *usage = "Usage: debugfs [[-w] device]";
1412 char c;
1413 int open_flags = 0;
1414 char *request = 0;
1415 int exit_status = 0;
1416 char *cmd_file = 0;
1417
1418 initialize_ext2_error_table();
1419
1420 while ((c = getopt (argc, argv, "wR:f:")) != EOF) {
1421 switch (c) {
1422 case 'R':
1423 request = optarg;
1424 break;
1425 case 'f':
1426 cmd_file = optarg;
1427 break;
1428 case 'w':
1429 open_flags = EXT2_FLAG_RW;
1430 break;
1431 default:
1432 com_err(argv[0], 0, usage);
1433 return;
1434 }
1435 }
1436 if (optind < argc)
1437 open_filesystem(argv[optind], open_flags);
1438
1439 sci_idx = ss_create_invocation("debugfs", "0.0", (char *) NULL,
1440 &debug_cmds, &retval);
1441 if (retval) {
1442 ss_perror(sci_idx, retval, "creating invocation");
1443 exit(1);
1444 }
1445
1446 (void) ss_add_request_table (sci_idx, &ss_std_requests, 1, &retval);
1447 if (retval) {
1448 ss_perror(sci_idx, retval, "adding standard requests");
1449 exit (1);
1450 }
1451 if (request) {
1452 retval = 0;
1453 retval = ss_execute_line(sci_idx, request);
1454 if (retval) {
1455 ss_perror(sci_idx, retval, request);
1456 exit_status++;
1457 }
1458 } else if (cmd_file) {
1459 exit_status = source_file(cmd_file, sci_idx);
1460 } else {
1461 ss_listen(sci_idx);
1462 }
1463
1464 if (current_fs)
1465 close_filesystem();
1466
1467 exit(exit_status);
1468 }
1469
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