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Commit | Line | Data |
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63cccae4 KZ |
1 | /* |
2 | * cramfsck - check a cramfs file system | |
3 | * | |
19922f22 KZ |
4 | * Copyright (C) 2000-2002 Transmeta Corporation |
5 | * 2005 Adrian Bunk | |
63cccae4 KZ |
6 | * |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License as published by | |
9 | * the Free Software Foundation; either version 2 of the License, or | |
10 | * (at your option) any later version. | |
11 | * | |
12 | * This program is distributed in the hope that it will be useful, | |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | * GNU General Public License for more details. | |
16 | * | |
7cebf0bb SK |
17 | * You should have received a copy of the GNU General Public License along |
18 | * with this program; if not, write to the Free Software Foundation, Inc., | |
19 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. | |
63cccae4 KZ |
20 | * |
21 | * 1999/12/03: Linus Torvalds (cramfs tester and unarchive program) | |
22 | * 2000/06/03: Daniel Quinlan (CRC and length checking program) | |
23 | * 2000/06/04: Daniel Quinlan (merged programs, added options, support | |
24 | * for special files, preserve permissions and | |
25 | * ownership, cramfs superblock v2, bogus mode | |
26 | * test, pathname length test, etc.) | |
27 | * 2000/06/06: Daniel Quinlan (support for holes, pretty-printing, | |
28 | * symlink size test) | |
29 | * 2000/07/11: Daniel Quinlan (file length tests, start at offset 0 or 512, | |
30 | * fsck-compatible exit codes) | |
31 | * 2000/07/15: Daniel Quinlan (initial support for block devices) | |
19922f22 KZ |
32 | * 2002/01/10: Daniel Quinlan (additional checks, test more return codes, |
33 | * use read if mmap fails, standardize messages) | |
63cccae4 KZ |
34 | */ |
35 | ||
63cccae4 | 36 | #include <stdio.h> |
19922f22 | 37 | #include <stdarg.h> |
d51f37a3 | 38 | #include <stdint.h> |
63cccae4 KZ |
39 | #include <unistd.h> |
40 | #include <dirent.h> | |
41 | #include <stdlib.h> | |
42 | #include <errno.h> | |
43 | #include <string.h> | |
44 | #include <getopt.h> | |
45 | #include <utime.h> | |
46 | #include <fcntl.h> | |
2687686c KZ |
47 | |
48 | /* We don't use our include/crc32.h, but crc32 from zlib! | |
49 | * | |
50 | * The zlib implemenation performs pre/post-conditioning. The util-linux | |
51 | * imlemenation requires post-conditioning (xor) in the applications. | |
52 | */ | |
63cccae4 KZ |
53 | #include <zlib.h> |
54 | ||
55 | #include <sys/types.h> | |
56 | #include <sys/stat.h> | |
57 | #include <sys/mman.h> | |
63cccae4 | 58 | |
075d2c07 | 59 | #include "c.h" |
63cccae4 | 60 | #include "cramfs.h" |
63cccae4 | 61 | #include "nls.h" |
098fa6b1 | 62 | #include "blkdev.h" |
5d6fb944 | 63 | #include "exitcodes.h" |
5cd50ebc | 64 | #include "strutils.h" |
45ca68ec | 65 | #include "closestream.h" |
63cccae4 | 66 | |
70b604b8 | 67 | #define XALLOC_EXIT_CODE FSCK_EX_ERROR |
fc8dc410 SK |
68 | #include "xalloc.h" |
69 | ||
63cccae4 KZ |
70 | static int fd; /* ROM image file descriptor */ |
71 | static char *filename; /* ROM image filename */ | |
2ba641e5 | 72 | static struct cramfs_super super; /* just find the cramfs superblock once */ |
fbaec83b | 73 | static int cramfs_is_big_endian = 0; /* source is big endian */ |
63cccae4 | 74 | static int opt_verbose = 0; /* 1 = verbose (-v), 2+ = very verbose (-vv) */ |
34731f89 | 75 | static int opt_extract = 0; /* extract cramfs (-x) */ |
2ba641e5 | 76 | static char *extract_dir = ""; /* optional extraction directory (-x) */ |
63cccae4 | 77 | |
63cccae4 | 78 | #define PAD_SIZE 512 |
b22550fa | 79 | |
6ffd9b03 | 80 | static uid_t euid; /* effective UID */ |
19922f22 KZ |
81 | |
82 | /* (cramfs_super + start) <= start_dir < end_dir <= start_data <= end_data */ | |
6ffd9b03 SK |
83 | static unsigned long start_dir = ~0UL; /* start of first non-root inode */ |
84 | static unsigned long end_dir = 0; /* end of the directory structure */ | |
85 | static unsigned long start_data = ~0UL; /* start of the data (256 MB = max) */ | |
86 | static unsigned long end_data = 0; /* end of the data */ | |
19922f22 | 87 | |
63cccae4 KZ |
88 | |
89 | /* Guarantee access to at least 8kB at a time */ | |
90 | #define ROMBUFFER_BITS 13 | |
91 | #define ROMBUFFERSIZE (1 << ROMBUFFER_BITS) | |
6ffd9b03 | 92 | #define ROMBUFFERMASK (ROMBUFFERSIZE - 1) |
63cccae4 KZ |
93 | static char read_buffer[ROMBUFFERSIZE * 2]; |
94 | static unsigned long read_buffer_block = ~0UL; | |
95 | ||
19922f22 | 96 | static z_stream stream; |
63cccae4 | 97 | |
19922f22 KZ |
98 | /* Prototypes */ |
99 | static void expand_fs(char *, struct cramfs_inode *); | |
63cccae4 | 100 | |
19922f22 KZ |
101 | static char *outbuffer; |
102 | ||
5cd50ebc | 103 | static size_t blksize = 0; |
19922f22 | 104 | |
5118d1be | 105 | static void __attribute__((__noreturn__)) usage(void) |
63cccae4 | 106 | { |
5118d1be | 107 | FILE *out = stdout; |
63cccae4 | 108 | |
7ee26cbf SK |
109 | fputs(USAGE_HEADER, out); |
110 | fprintf(out, | |
09af3db4 | 111 | _(" %s [options] <file>\n"), program_invocation_short_name); |
451dbcfa | 112 | |
7ee26cbf SK |
113 | fputs(USAGE_SEPARATOR, out); |
114 | fputs(_("Check and repair a compressed ROM filesystem.\n"), out); | |
115 | ||
116 | fputs(USAGE_OPTIONS, out); | |
117 | fputs(_(" -a for compatibility only, ignored\n"), out); | |
118 | fputs(_(" -v, --verbose be more verbose\n"), out); | |
119 | fputs(_(" -y for compatibility only, ignored\n"), out); | |
120 | fputs(_(" -b, --blocksize <size> use this blocksize, defaults to page size\n"), out); | |
121 | fputs(_(" --extract[=<dir>] test uncompression, optionally extract into <dir>\n"), out); | |
122 | fputs(USAGE_SEPARATOR, out); | |
f45f3ec3 | 123 | printf(USAGE_HELP_OPTIONS(26)); |
7ee26cbf | 124 | |
b3054454 | 125 | printf(USAGE_MAN_TAIL("fsck.cramfs(8)")); |
5118d1be | 126 | exit(FSCK_EX_OK); |
63cccae4 KZ |
127 | } |
128 | ||
d63eb75e | 129 | static int get_superblock_endianness(uint32_t magic) |
fbaec83b SRP |
130 | { |
131 | if (magic == CRAMFS_MAGIC) { | |
132 | cramfs_is_big_endian = HOST_IS_BIG_ENDIAN; | |
133 | return 0; | |
6ffd9b03 SK |
134 | } else if (magic == |
135 | u32_toggle_endianness(!HOST_IS_BIG_ENDIAN, CRAMFS_MAGIC)) { | |
fbaec83b SRP |
136 | cramfs_is_big_endian = !HOST_IS_BIG_ENDIAN; |
137 | return 0; | |
6ffd9b03 | 138 | } else |
fbaec83b | 139 | return -1; |
fbaec83b SRP |
140 | } |
141 | ||
6ffd9b03 SK |
142 | static void test_super(int *start, size_t * length) |
143 | { | |
19922f22 KZ |
144 | struct stat st; |
145 | ||
146 | /* find the physical size of the file or block device */ | |
6ffd9b03 | 147 | if (stat(filename, &st) < 0) |
fc14ceba | 148 | err(FSCK_EX_ERROR, _("stat of %s failed"), filename); |
6ffd9b03 | 149 | |
19922f22 | 150 | fd = open(filename, O_RDONLY); |
6ffd9b03 | 151 | if (fd < 0) |
289dcc90 | 152 | err(FSCK_EX_ERROR, _("cannot open %s"), filename); |
6ffd9b03 | 153 | |
19922f22 | 154 | if (S_ISBLK(st.st_mode)) { |
098fa6b1 | 155 | unsigned long long bytes; |
6ffd9b03 | 156 | if (blkdev_get_size(fd, &bytes)) |
70b604b8 | 157 | err(FSCK_EX_ERROR, |
6ffd9b03 SK |
158 | _("ioctl failed: unable to determine device size: %s"), |
159 | filename); | |
098fa6b1 | 160 | *length = bytes; |
6ffd9b03 | 161 | } else if (S_ISREG(st.st_mode)) |
19922f22 | 162 | *length = st.st_size; |
6ffd9b03 | 163 | else |
70b604b8 | 164 | errx(FSCK_EX_ERROR, _("not a block device or file: %s"), filename); |
19922f22 | 165 | |
6ffd9b03 | 166 | if (*length < sizeof(struct cramfs_super)) |
70b604b8 | 167 | errx(FSCK_EX_UNCORRECTED, _("file length too short")); |
19922f22 KZ |
168 | |
169 | /* find superblock */ | |
6ffd9b03 | 170 | if (read(fd, &super, sizeof(super)) != sizeof(super)) |
47481cbd | 171 | err(FSCK_EX_ERROR, _("cannot read %s"), filename); |
6ffd9b03 | 172 | if (get_superblock_endianness(super.magic) != -1) |
19922f22 | 173 | *start = 0; |
19922f22 | 174 | else if (*length >= (PAD_SIZE + sizeof(super))) { |
b3f30f50 | 175 | if (lseek(fd, PAD_SIZE, SEEK_SET) == (off_t) -1) |
47481cbd | 176 | err(FSCK_EX_ERROR, _("seek on %s failed"), filename); |
6ffd9b03 | 177 | if (read(fd, &super, sizeof(super)) != sizeof(super)) |
47481cbd | 178 | err(FSCK_EX_ERROR, _("cannot read %s"), filename); |
6ffd9b03 | 179 | if (get_superblock_endianness(super.magic) != -1) |
19922f22 | 180 | *start = PAD_SIZE; |
6ffd9b03 | 181 | else |
70b604b8 | 182 | errx(FSCK_EX_UNCORRECTED, _("superblock magic not found")); |
6ffd9b03 | 183 | } else |
70b604b8 | 184 | errx(FSCK_EX_UNCORRECTED, _("superblock magic not found")); |
fbaec83b | 185 | |
6ffd9b03 | 186 | if (opt_verbose) |
6de1396e SK |
187 | printf(_("cramfs endianness is %s\n"), |
188 | cramfs_is_big_endian ? _("big") : _("little")); | |
fbaec83b SRP |
189 | |
190 | super_toggle_endianness(cramfs_is_big_endian, &super); | |
6ffd9b03 | 191 | if (super.flags & ~CRAMFS_SUPPORTED_FLAGS) |
70b604b8 | 192 | errx(FSCK_EX_ERROR, _("unsupported filesystem features")); |
6ffd9b03 | 193 | |
f991dbd3 RM |
194 | /* What are valid superblock sizes? */ |
195 | if (super.size < sizeof(struct cramfs_super)) | |
70b604b8 | 196 | errx(FSCK_EX_UNCORRECTED, _("superblock size (%d) too small"), |
6ffd9b03 SK |
197 | super.size); |
198 | ||
19922f22 | 199 | if (super.flags & CRAMFS_FLAG_FSID_VERSION_2) { |
6ffd9b03 | 200 | if (super.fsid.files == 0) |
70b604b8 | 201 | errx(FSCK_EX_UNCORRECTED, _("zero file count")); |
6ffd9b03 | 202 | if (*length < super.size) |
70b604b8 | 203 | errx(FSCK_EX_UNCORRECTED, _("file length too short")); |
6ffd9b03 | 204 | else if (*length > super.size) |
deedae5f | 205 | warnx(_("file extends past end of filesystem")); |
6ffd9b03 | 206 | } else |
deedae5f | 207 | warnx(_("old cramfs format")); |
19922f22 KZ |
208 | } |
209 | ||
210 | static void test_crc(int start) | |
211 | { | |
212 | void *buf; | |
d51f37a3 | 213 | uint32_t crc; |
19922f22 KZ |
214 | |
215 | if (!(super.flags & CRAMFS_FLAG_FSID_VERSION_2)) { | |
deedae5f | 216 | warnx(_("unable to test CRC: old cramfs format")); |
19922f22 | 217 | return; |
19922f22 KZ |
218 | } |
219 | ||
87918040 | 220 | crc = crc32(0L, NULL, 0); |
19922f22 | 221 | |
6ffd9b03 | 222 | buf = |
919e372d | 223 | mmap(NULL, super.size, PROT_READ | PROT_WRITE, MAP_PRIVATE, fd, 0); |
19922f22 | 224 | if (buf == MAP_FAILED) { |
6ffd9b03 | 225 | buf = |
919e372d | 226 | mmap(NULL, super.size, PROT_READ | PROT_WRITE, |
6ffd9b03 | 227 | MAP_PRIVATE | MAP_ANONYMOUS, -1, 0); |
19922f22 | 228 | if (buf != MAP_FAILED) { |
919e372d | 229 | if (lseek(fd, 0, SEEK_SET) == (off_t) -1) |
47481cbd | 230 | err(FSCK_EX_ERROR, _("seek on %s failed"), filename); |
919e372d | 231 | if (read(fd, buf, super.size) != (ssize_t) super.size) |
47481cbd | 232 | err(FSCK_EX_ERROR, _("cannot read %s"), filename); |
19922f22 KZ |
233 | } |
234 | } | |
235 | if (buf != MAP_FAILED) { | |
aa719998 | 236 | ((struct cramfs_super *)((unsigned char *) buf + start))->fsid.crc = |
87918040 | 237 | crc32(0L, NULL, 0); |
919e372d RM |
238 | crc = crc32(crc, (unsigned char *) buf + start, super.size - start); |
239 | munmap(buf, super.size); | |
6ffd9b03 | 240 | } else { |
19922f22 KZ |
241 | int retval; |
242 | size_t length = 0; | |
243 | ||
fc8dc410 | 244 | buf = xmalloc(4096); |
b3f30f50 | 245 | if (lseek(fd, start, SEEK_SET) == (off_t) -1) |
47481cbd | 246 | err(FSCK_EX_ERROR, _("seek on %s failed"), filename); |
19922f22 KZ |
247 | for (;;) { |
248 | retval = read(fd, buf, 4096); | |
6ffd9b03 | 249 | if (retval < 0) |
47481cbd | 250 | err(FSCK_EX_ERROR, _("cannot read %s"), filename); |
6ffd9b03 | 251 | else if (retval == 0) |
19922f22 | 252 | break; |
6ffd9b03 SK |
253 | if (length == 0) |
254 | ((struct cramfs_super *)buf)->fsid.crc = | |
87918040 | 255 | crc32(0L, NULL, 0); |
19922f22 | 256 | length += retval; |
6ffd9b03 | 257 | if (length > (super.size - start)) { |
2687686c | 258 | crc = crc32(crc, buf, |
6ffd9b03 SK |
259 | retval - (length - |
260 | (super.size - start))); | |
19922f22 KZ |
261 | break; |
262 | } | |
2687686c | 263 | crc = crc32(crc, buf, retval); |
19922f22 KZ |
264 | } |
265 | free(buf); | |
266 | } | |
267 | ||
6ffd9b03 | 268 | if (crc != super.fsid.crc) |
70b604b8 | 269 | errx(FSCK_EX_UNCORRECTED, _("crc error")); |
19922f22 KZ |
270 | } |
271 | ||
63cccae4 KZ |
272 | static void print_node(char type, struct cramfs_inode *i, char *name) |
273 | { | |
274 | char info[10]; | |
275 | ||
6ffd9b03 | 276 | if (S_ISCHR(i->mode) || (S_ISBLK(i->mode))) |
63cccae4 KZ |
277 | /* major/minor numbers can be as high as 2^12 or 4096 */ |
278 | snprintf(info, 10, "%4d,%4d", major(i->size), minor(i->size)); | |
6ffd9b03 | 279 | else |
63cccae4 KZ |
280 | /* size be as high as 2^24 or 16777216 */ |
281 | snprintf(info, 10, "%9d", i->size); | |
63cccae4 KZ |
282 | |
283 | printf("%c %04o %s %5d:%-3d %s\n", | |
a6f72ab4 KZ |
284 | type, i->mode & ~S_IFMT, info, i->uid, i->gid, |
285 | !*name && type == 'd' ? "/" : name); | |
63cccae4 KZ |
286 | } |
287 | ||
288 | /* | |
289 | * Create a fake "blocked" access | |
290 | */ | |
291 | static void *romfs_read(unsigned long offset) | |
292 | { | |
293 | unsigned int block = offset >> ROMBUFFER_BITS; | |
294 | if (block != read_buffer_block) { | |
52848780 KZ |
295 | ssize_t x; |
296 | ||
63cccae4 | 297 | read_buffer_block = block; |
b3f30f50 KZ |
298 | if (lseek(fd, block << ROMBUFFER_BITS, SEEK_SET) == (off_t) -1) |
299 | warn(_("seek failed")); | |
52848780 KZ |
300 | |
301 | x = read(fd, read_buffer, ROMBUFFERSIZE * 2); | |
302 | if (x < 0) | |
303 | warn(_("read romfs failed")); | |
63cccae4 KZ |
304 | } |
305 | return read_buffer + (offset & ROMBUFFERMASK); | |
306 | } | |
307 | ||
6ffd9b03 | 308 | static struct cramfs_inode *cramfs_iget(struct cramfs_inode *i) |
63cccae4 | 309 | { |
fc8dc410 | 310 | struct cramfs_inode *inode = xmalloc(sizeof(struct cramfs_inode)); |
19922f22 | 311 | |
fbaec83b | 312 | inode_to_host(cramfs_is_big_endian, i, inode); |
63cccae4 KZ |
313 | return inode; |
314 | } | |
315 | ||
316 | static struct cramfs_inode *iget(unsigned int ino) | |
317 | { | |
318 | return cramfs_iget(romfs_read(ino)); | |
319 | } | |
320 | ||
63cccae4 KZ |
321 | static void iput(struct cramfs_inode *inode) |
322 | { | |
323 | free(inode); | |
324 | } | |
63cccae4 KZ |
325 | |
326 | /* | |
19922f22 | 327 | * Return the offset of the root directory |
63cccae4 KZ |
328 | */ |
329 | static struct cramfs_inode *read_super(void) | |
330 | { | |
6ffd9b03 | 331 | struct cramfs_inode *root = cramfs_iget(&super.root); |
fbaec83b | 332 | unsigned long offset = root->offset << 2; |
19922f22 | 333 | |
fbaec83b | 334 | if (!S_ISDIR(root->mode)) |
70b604b8 | 335 | errx(FSCK_EX_UNCORRECTED, _("root inode is not directory")); |
19922f22 KZ |
336 | if (!(super.flags & CRAMFS_FLAG_SHIFTED_ROOT_OFFSET) && |
337 | ((offset != sizeof(struct cramfs_super)) && | |
6ffd9b03 | 338 | (offset != PAD_SIZE + sizeof(struct cramfs_super)))) { |
70b604b8 | 339 | errx(FSCK_EX_UNCORRECTED, _("bad root offset (%lu)"), offset); |
19922f22 | 340 | } |
fbaec83b | 341 | return root; |
63cccae4 KZ |
342 | } |
343 | ||
52848780 | 344 | static int uncompress_block(void *src, size_t len) |
63cccae4 KZ |
345 | { |
346 | int err; | |
347 | ||
348 | stream.next_in = src; | |
349 | stream.avail_in = len; | |
350 | ||
6ffd9b03 | 351 | stream.next_out = (unsigned char *)outbuffer; |
38141baf | 352 | stream.avail_out = blksize * 2; |
63cccae4 KZ |
353 | |
354 | inflateReset(&stream); | |
355 | ||
38141baf | 356 | if (len > blksize * 2) |
70b604b8 | 357 | errx(FSCK_EX_UNCORRECTED, _("data block too large")); |
6ffd9b03 | 358 | |
63cccae4 | 359 | err = inflate(&stream, Z_FINISH); |
6ffd9b03 | 360 | if (err != Z_STREAM_END) |
52848780 KZ |
361 | errx(FSCK_EX_UNCORRECTED, _("decompression error: %s"), |
362 | zError(err)); | |
63cccae4 KZ |
363 | return stream.total_out; |
364 | } | |
365 | ||
48d7b13a KZ |
366 | #if !HAVE_LCHOWN |
367 | #define lchown chown | |
63cccae4 | 368 | #endif |
6ffd9b03 | 369 | |
7ee26cbf | 370 | static void do_uncompress(char *path, int outfd, unsigned long offset, |
6ffd9b03 | 371 | unsigned long size) |
19922f22 | 372 | { |
38141baf | 373 | unsigned long curr = offset + 4 * ((size + blksize - 1) / blksize); |
19922f22 KZ |
374 | |
375 | do { | |
38141baf | 376 | unsigned long out = blksize; |
6ffd9b03 SK |
377 | unsigned long next = u32_toggle_endianness(cramfs_is_big_endian, |
378 | *(uint32_t *) | |
379 | romfs_read(offset)); | |
19922f22 | 380 | |
6ffd9b03 | 381 | if (next > end_data) |
19922f22 | 382 | end_data = next; |
19922f22 KZ |
383 | |
384 | offset += 4; | |
385 | if (curr == next) { | |
6ffd9b03 | 386 | if (opt_verbose > 1) |
e3ca1312 | 387 | printf(_(" hole at %lu (%zu)\n"), curr, |
38141baf RM |
388 | blksize); |
389 | if (size < blksize) | |
19922f22 KZ |
390 | out = size; |
391 | memset(outbuffer, 0x00, out); | |
6ffd9b03 SK |
392 | } else { |
393 | if (opt_verbose > 1) | |
e3ca1312 | 394 | printf(_(" uncompressing block at %lu to %lu (%lu)\n"), |
6ffd9b03 | 395 | curr, next, next - curr); |
19922f22 KZ |
396 | out = uncompress_block(romfs_read(curr), next - curr); |
397 | } | |
38141baf RM |
398 | if (size >= blksize) { |
399 | if (out != blksize) | |
70b604b8 | 400 | errx(FSCK_EX_UNCORRECTED, |
6ffd9b03 | 401 | _("non-block (%ld) bytes"), out); |
19922f22 | 402 | } else { |
6ffd9b03 | 403 | if (out != size) |
70b604b8 | 404 | errx(FSCK_EX_UNCORRECTED, |
6ffd9b03 SK |
405 | _("non-size (%ld vs %ld) bytes"), out, |
406 | size); | |
19922f22 KZ |
407 | } |
408 | size -= out; | |
74ce680a SK |
409 | if (*extract_dir != '\0' && write(outfd, outbuffer, out) < 0) |
410 | err(FSCK_EX_ERROR, _("write failed: %s"), path); | |
19922f22 KZ |
411 | curr = next; |
412 | } while (size); | |
413 | } | |
63cccae4 KZ |
414 | |
415 | static void change_file_status(char *path, struct cramfs_inode *i) | |
416 | { | |
417 | struct utimbuf epoch = { 0, 0 }; | |
418 | ||
419 | if (euid == 0) { | |
6ffd9b03 | 420 | if (lchown(path, i->uid, i->gid) < 0) |
70b604b8 | 421 | err(FSCK_EX_ERROR, _("lchown failed: %s"), path); |
63cccae4 KZ |
422 | if (S_ISLNK(i->mode)) |
423 | return; | |
6ffd9b03 | 424 | if (((S_ISUID | S_ISGID) & i->mode) && chmod(path, i->mode) < 0) |
70b604b8 | 425 | err(FSCK_EX_ERROR, _("chown failed: %s"), path); |
63cccae4 KZ |
426 | } |
427 | if (S_ISLNK(i->mode)) | |
428 | return; | |
6ffd9b03 | 429 | if (utime(path, &epoch) < 0) |
70b604b8 | 430 | err(FSCK_EX_ERROR, _("utime failed: %s"), path); |
19922f22 KZ |
431 | } |
432 | ||
433 | static void do_directory(char *path, struct cramfs_inode *i) | |
434 | { | |
435 | int pathlen = strlen(path); | |
436 | int count = i->size; | |
437 | unsigned long offset = i->offset << 2; | |
fc8dc410 | 438 | char *newpath = xmalloc(pathlen + 256); |
19922f22 | 439 | |
6ffd9b03 | 440 | if (offset == 0 && count != 0) |
70b604b8 | 441 | errx(FSCK_EX_UNCORRECTED, |
6ffd9b03 SK |
442 | _("directory inode has zero offset and non-zero size: %s"), |
443 | path); | |
444 | ||
445 | if (offset != 0 && offset < start_dir) | |
19922f22 | 446 | start_dir = offset; |
6ffd9b03 | 447 | |
19922f22 KZ |
448 | /* TODO: Do we need to check end_dir for empty case? */ |
449 | memcpy(newpath, path, pathlen); | |
450 | newpath[pathlen] = '/'; | |
451 | pathlen++; | |
6ffd9b03 | 452 | if (opt_verbose) |
19922f22 | 453 | print_node('d', i, path); |
6ffd9b03 | 454 | |
2d317f11 | 455 | if (*extract_dir != '\0') { |
6ffd9b03 | 456 | if (mkdir(path, i->mode) < 0) |
70b604b8 | 457 | err(FSCK_EX_ERROR, _("mkdir failed: %s"), path); |
19922f22 KZ |
458 | change_file_status(path, i); |
459 | } | |
460 | while (count > 0) { | |
461 | struct cramfs_inode *child = iget(offset); | |
462 | int size; | |
463 | int newlen = child->namelen << 2; | |
464 | ||
465 | size = sizeof(struct cramfs_inode) + newlen; | |
466 | count -= size; | |
467 | ||
468 | offset += sizeof(struct cramfs_inode); | |
469 | ||
470 | memcpy(newpath + pathlen, romfs_read(offset), newlen); | |
471 | newpath[pathlen + newlen] = 0; | |
6ffd9b03 | 472 | if (newlen == 0) |
70b604b8 | 473 | errx(FSCK_EX_UNCORRECTED, _("filename length is zero")); |
6ffd9b03 | 474 | if ((pathlen + newlen) - strlen(newpath) > 3) |
70b604b8 | 475 | errx(FSCK_EX_UNCORRECTED, _("bad filename length")); |
19922f22 KZ |
476 | expand_fs(newpath, child); |
477 | ||
478 | offset += newlen; | |
479 | ||
6ffd9b03 | 480 | if (offset <= start_dir) |
70b604b8 | 481 | errx(FSCK_EX_UNCORRECTED, _("bad inode offset")); |
6ffd9b03 | 482 | if (offset > end_dir) |
19922f22 | 483 | end_dir = offset; |
6ffd9b03 | 484 | iput(child); /* free(child) */ |
19922f22 KZ |
485 | } |
486 | free(newpath); | |
487 | } | |
488 | ||
489 | static void do_file(char *path, struct cramfs_inode *i) | |
490 | { | |
491 | unsigned long offset = i->offset << 2; | |
7ee26cbf | 492 | int outfd = 0; |
19922f22 | 493 | |
6ffd9b03 | 494 | if (offset == 0 && i->size != 0) |
70b604b8 | 495 | errx(FSCK_EX_UNCORRECTED, |
6ffd9b03 SK |
496 | _("file inode has zero offset and non-zero size")); |
497 | if (i->size == 0 && offset != 0) | |
70b604b8 | 498 | errx(FSCK_EX_UNCORRECTED, |
6ffd9b03 SK |
499 | _("file inode has zero size and non-zero offset")); |
500 | if (offset != 0 && offset < start_data) | |
19922f22 | 501 | start_data = offset; |
6ffd9b03 | 502 | if (opt_verbose) |
19922f22 | 503 | print_node('f', i, path); |
2d317f11 | 504 | if (*extract_dir != '\0') { |
7ee26cbf SK |
505 | outfd = open(path, O_WRONLY | O_CREAT | O_TRUNC, i->mode); |
506 | if (outfd < 0) | |
289dcc90 | 507 | err(FSCK_EX_ERROR, _("cannot open %s"), path); |
19922f22 | 508 | } |
6ffd9b03 | 509 | if (i->size) |
7ee26cbf | 510 | do_uncompress(path, outfd, offset, i->size); |
2d317f11 | 511 | if ( *extract_dir != '\0') { |
7ee26cbf | 512 | if (close_fd(outfd) != 0) |
83f210e8 | 513 | err(FSCK_EX_ERROR, _("write failed: %s"), path); |
19922f22 | 514 | change_file_status(path, i); |
63cccae4 KZ |
515 | } |
516 | } | |
517 | ||
518 | static void do_symlink(char *path, struct cramfs_inode *i) | |
519 | { | |
520 | unsigned long offset = i->offset << 2; | |
521 | unsigned long curr = offset + 4; | |
6ffd9b03 SK |
522 | unsigned long next = |
523 | u32_toggle_endianness(cramfs_is_big_endian, | |
524 | *(uint32_t *) romfs_read(offset)); | |
63cccae4 KZ |
525 | unsigned long size; |
526 | ||
6ffd9b03 | 527 | if (offset == 0) |
70b604b8 | 528 | errx(FSCK_EX_UNCORRECTED, _("symbolic link has zero offset")); |
6ffd9b03 | 529 | if (i->size == 0) |
70b604b8 | 530 | errx(FSCK_EX_UNCORRECTED, _("symbolic link has zero size")); |
19922f22 | 531 | |
6ffd9b03 | 532 | if (offset < start_data) |
19922f22 | 533 | start_data = offset; |
6ffd9b03 | 534 | if (next > end_data) |
63cccae4 | 535 | end_data = next; |
63cccae4 KZ |
536 | |
537 | size = uncompress_block(romfs_read(curr), next - curr); | |
6ffd9b03 | 538 | if (size != i->size) |
70b604b8 | 539 | errx(FSCK_EX_UNCORRECTED, _("size error in symlink: %s"), path); |
63cccae4 KZ |
540 | outbuffer[size] = 0; |
541 | if (opt_verbose) { | |
542 | char *str; | |
543 | ||
6f312c89 | 544 | xasprintf(&str, "%s -> %s", path, outbuffer); |
63cccae4 | 545 | print_node('l', i, str); |
6ffd9b03 | 546 | if (opt_verbose > 1) |
e3ca1312 | 547 | printf(_(" uncompressing block at %lu to %lu (%lu)\n"), |
6ffd9b03 | 548 | curr, next, next - curr); |
19922f22 | 549 | free(str); |
63cccae4 | 550 | } |
2d317f11 | 551 | if (*extract_dir != '\0') { |
6ffd9b03 | 552 | if (symlink(outbuffer, path) < 0) |
70b604b8 | 553 | err(FSCK_EX_ERROR, _("symlink failed: %s"), path); |
63cccae4 KZ |
554 | change_file_status(path, i); |
555 | } | |
556 | } | |
557 | ||
558 | static void do_special_inode(char *path, struct cramfs_inode *i) | |
559 | { | |
560 | dev_t devtype = 0; | |
561 | char type; | |
562 | ||
6ffd9b03 SK |
563 | if (i->offset) |
564 | /* no need to shift offset */ | |
70b604b8 | 565 | errx(FSCK_EX_UNCORRECTED, |
6ffd9b03 SK |
566 | _("special file has non-zero offset: %s"), path); |
567 | ||
63cccae4 KZ |
568 | if (S_ISCHR(i->mode)) { |
569 | devtype = i->size; | |
570 | type = 'c'; | |
6ffd9b03 | 571 | } else if (S_ISBLK(i->mode)) { |
63cccae4 KZ |
572 | devtype = i->size; |
573 | type = 'b'; | |
6ffd9b03 SK |
574 | } else if (S_ISFIFO(i->mode)) { |
575 | if (i->size != 0) | |
70b604b8 | 576 | errx(FSCK_EX_UNCORRECTED, _("fifo has non-zero size: %s"), |
6ffd9b03 | 577 | path); |
63cccae4 | 578 | type = 'p'; |
6ffd9b03 SK |
579 | } else if (S_ISSOCK(i->mode)) { |
580 | if (i->size != 0) | |
70b604b8 | 581 | errx(FSCK_EX_UNCORRECTED, |
6ffd9b03 | 582 | _("socket has non-zero size: %s"), path); |
63cccae4 | 583 | type = 's'; |
6ffd9b03 | 584 | } else { |
70b604b8 | 585 | errx(FSCK_EX_UNCORRECTED, _("bogus mode: %s (%o)"), path, i->mode); |
19922f22 | 586 | return; /* not reached */ |
63cccae4 KZ |
587 | } |
588 | ||
6ffd9b03 | 589 | if (opt_verbose) |
63cccae4 | 590 | print_node(type, i, path); |
63cccae4 | 591 | |
2d317f11 | 592 | if (*extract_dir != '\0') { |
6ffd9b03 | 593 | if (mknod(path, i->mode, devtype) < 0) |
70b604b8 | 594 | err(FSCK_EX_ERROR, _("mknod failed: %s"), path); |
63cccae4 KZ |
595 | change_file_status(path, i); |
596 | } | |
597 | } | |
598 | ||
19922f22 | 599 | static void expand_fs(char *path, struct cramfs_inode *inode) |
63cccae4 | 600 | { |
6ffd9b03 | 601 | if (S_ISDIR(inode->mode)) |
19922f22 | 602 | do_directory(path, inode); |
6ffd9b03 | 603 | else if (S_ISREG(inode->mode)) |
19922f22 | 604 | do_file(path, inode); |
6ffd9b03 | 605 | else if (S_ISLNK(inode->mode)) |
19922f22 | 606 | do_symlink(path, inode); |
6ffd9b03 | 607 | else |
19922f22 | 608 | do_special_inode(path, inode); |
63cccae4 KZ |
609 | } |
610 | ||
19922f22 | 611 | static void test_fs(int start) |
63cccae4 | 612 | { |
19922f22 | 613 | struct cramfs_inode *root; |
63cccae4 | 614 | |
19922f22 KZ |
615 | root = read_super(); |
616 | umask(0); | |
617 | euid = geteuid(); | |
618 | stream.next_in = NULL; | |
619 | stream.avail_in = 0; | |
620 | inflateInit(&stream); | |
621 | expand_fs(extract_dir, root); | |
622 | inflateEnd(&stream); | |
623 | if (start_data != ~0UL) { | |
6ffd9b03 | 624 | if (start_data < (sizeof(struct cramfs_super) + start)) |
70b604b8 | 625 | errx(FSCK_EX_UNCORRECTED, |
60cb2c37 | 626 | _("directory data start (%lu) < sizeof(struct cramfs_super) + start (%zu)"), |
6ffd9b03 SK |
627 | start_data, sizeof(struct cramfs_super) + start); |
628 | if (end_dir != start_data) | |
70b604b8 | 629 | errx(FSCK_EX_UNCORRECTED, |
60cb2c37 | 630 | _("directory data end (%lu) != file data start (%lu)"), |
6ffd9b03 SK |
631 | end_dir, start_data); |
632 | } | |
74ce680a SK |
633 | if (super.flags & CRAMFS_FLAG_FSID_VERSION_2 && end_data > super.size) |
634 | errx(FSCK_EX_UNCORRECTED, _("invalid file data offset")); | |
6ffd9b03 | 635 | |
19922f22 | 636 | iput(root); /* free(root) */ |
63cccae4 | 637 | } |
63cccae4 KZ |
638 | |
639 | int main(int argc, char **argv) | |
640 | { | |
63cccae4 KZ |
641 | int c; /* for getopt */ |
642 | int start = 0; | |
293889d0 | 643 | size_t length = 0; |
19922f22 | 644 | |
922ec175 | 645 | static const struct option longopts[] = { |
87918040 SK |
646 | {"verbose", no_argument, NULL, 'v'}, |
647 | {"version", no_argument, NULL, 'V'}, | |
648 | {"help", no_argument, NULL, 'h'}, | |
649 | {"blocksize", required_argument, NULL, 'b'}, | |
650 | {"extract", optional_argument, NULL, 'x'}, | |
651 | {NULL, 0, NULL, 0}, | |
922ec175 SK |
652 | }; |
653 | ||
e56644ca | 654 | setlocale(LC_MESSAGES, ""); |
5d4ece6e | 655 | setlocale(LC_CTYPE, ""); |
e56644ca PR |
656 | bindtextdomain(PACKAGE, LOCALEDIR); |
657 | textdomain(PACKAGE); | |
45ca68ec | 658 | atexit(close_stdout); |
e56644ca | 659 | |
0b2b32e8 RM |
660 | strutils_set_exitcode(FSCK_EX_USAGE); |
661 | ||
63cccae4 | 662 | /* command line options */ |
2d317f11 | 663 | while ((c = getopt_long(argc, argv, "ayvVhb:", longopts, NULL)) != EOF) |
63cccae4 | 664 | switch (c) { |
6bf463c5 KZ |
665 | case 'a': /* ignore */ |
666 | case 'y': | |
667 | break; | |
63cccae4 | 668 | case 'h': |
5118d1be | 669 | usage(); |
e4a36b8b | 670 | break; |
922ec175 SK |
671 | case 'V': |
672 | printf(UTIL_LINUX_VERSION); | |
05691d9e | 673 | return FSCK_EX_OK; |
63cccae4 | 674 | case 'x': |
63cccae4 | 675 | opt_extract = 1; |
2d317f11 RM |
676 | if(optarg) |
677 | extract_dir = optarg; | |
63cccae4 | 678 | break; |
63cccae4 KZ |
679 | case 'v': |
680 | opt_verbose++; | |
681 | break; | |
5cd50ebc | 682 | case 'b': |
5cd50ebc | 683 | blksize = strtou32_or_err(optarg, _("invalid blocksize argument")); |
5cd50ebc | 684 | break; |
de173766 | 685 | default: |
677ec86c | 686 | errtryhelp(FSCK_EX_USAGE); |
63cccae4 | 687 | } |
63cccae4 | 688 | |
5118d1be RM |
689 | if ((argc - optind) != 1){ |
690 | warnx(_("bad usage")); | |
691 | errtryhelp(FSCK_EX_USAGE); | |
692 | } | |
63cccae4 KZ |
693 | filename = argv[optind]; |
694 | ||
19922f22 KZ |
695 | test_super(&start, &length); |
696 | test_crc(start); | |
34731f89 | 697 | |
2d317f11 RM |
698 | if(opt_extract) { |
699 | if (blksize == 0) | |
700 | blksize = getpagesize(); | |
701 | outbuffer = xmalloc(blksize * 2); | |
702 | test_fs(start); | |
703 | } | |
63cccae4 | 704 | |
6ffd9b03 | 705 | if (opt_verbose) |
6de1396e | 706 | printf(_("%s: OK\n"), filename); |
63cccae4 | 707 | |
70b604b8 | 708 | exit(FSCK_EX_OK); |
63cccae4 | 709 | } |