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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> | |
63cccae4 | 45 | #include <fcntl.h> |
2687686c KZ |
46 | |
47 | /* We don't use our include/crc32.h, but crc32 from zlib! | |
48 | * | |
73afd3f8 | 49 | * The zlib implementation performs pre/post-conditioning. The util-linux |
2687686c KZ |
50 | * imlemenation requires post-conditioning (xor) in the applications. |
51 | */ | |
63cccae4 KZ |
52 | #include <zlib.h> |
53 | ||
ad7ac3d5 | 54 | #include <sys/time.h> |
63cccae4 KZ |
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 | 194 | /* What are valid superblock sizes? */ |
2374b1ab | 195 | if (super.size < *start + 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) { |
68ac4269 | 229 | ssize_t tmp; |
919e372d | 230 | if (lseek(fd, 0, SEEK_SET) == (off_t) -1) |
47481cbd | 231 | err(FSCK_EX_ERROR, _("seek on %s failed"), filename); |
68ac4269 RM |
232 | tmp = read(fd, buf, super.size); |
233 | if (tmp < 0) | |
47481cbd | 234 | err(FSCK_EX_ERROR, _("cannot read %s"), filename); |
68ac4269 RM |
235 | if (tmp != (ssize_t) super.size) |
236 | errx(FSCK_EX_ERROR, _("failed to read %"PRIu32" bytes from file %s"), | |
237 | super.size, filename); | |
19922f22 KZ |
238 | } |
239 | } | |
240 | if (buf != MAP_FAILED) { | |
aa719998 | 241 | ((struct cramfs_super *)((unsigned char *) buf + start))->fsid.crc = |
87918040 | 242 | crc32(0L, NULL, 0); |
919e372d RM |
243 | crc = crc32(crc, (unsigned char *) buf + start, super.size - start); |
244 | munmap(buf, super.size); | |
6ffd9b03 | 245 | } else { |
19922f22 KZ |
246 | int retval; |
247 | size_t length = 0; | |
248 | ||
fc8dc410 | 249 | buf = xmalloc(4096); |
b3f30f50 | 250 | if (lseek(fd, start, SEEK_SET) == (off_t) -1) |
47481cbd | 251 | err(FSCK_EX_ERROR, _("seek on %s failed"), filename); |
19922f22 KZ |
252 | for (;;) { |
253 | retval = read(fd, buf, 4096); | |
6ffd9b03 | 254 | if (retval < 0) |
47481cbd | 255 | err(FSCK_EX_ERROR, _("cannot read %s"), filename); |
6ffd9b03 | 256 | else if (retval == 0) |
19922f22 | 257 | break; |
6ffd9b03 SK |
258 | if (length == 0) |
259 | ((struct cramfs_super *)buf)->fsid.crc = | |
87918040 | 260 | crc32(0L, NULL, 0); |
19922f22 | 261 | length += retval; |
6ffd9b03 | 262 | if (length > (super.size - start)) { |
2687686c | 263 | crc = crc32(crc, buf, |
6ffd9b03 SK |
264 | retval - (length - |
265 | (super.size - start))); | |
19922f22 KZ |
266 | break; |
267 | } | |
2687686c | 268 | crc = crc32(crc, buf, retval); |
19922f22 KZ |
269 | } |
270 | free(buf); | |
271 | } | |
272 | ||
6ffd9b03 | 273 | if (crc != super.fsid.crc) |
70b604b8 | 274 | errx(FSCK_EX_UNCORRECTED, _("crc error")); |
19922f22 KZ |
275 | } |
276 | ||
63cccae4 KZ |
277 | static void print_node(char type, struct cramfs_inode *i, char *name) |
278 | { | |
279 | char info[10]; | |
280 | ||
6ffd9b03 | 281 | if (S_ISCHR(i->mode) || (S_ISBLK(i->mode))) |
63cccae4 KZ |
282 | /* major/minor numbers can be as high as 2^12 or 4096 */ |
283 | snprintf(info, 10, "%4d,%4d", major(i->size), minor(i->size)); | |
6ffd9b03 | 284 | else |
63cccae4 KZ |
285 | /* size be as high as 2^24 or 16777216 */ |
286 | snprintf(info, 10, "%9d", i->size); | |
63cccae4 KZ |
287 | |
288 | printf("%c %04o %s %5d:%-3d %s\n", | |
a6f72ab4 KZ |
289 | type, i->mode & ~S_IFMT, info, i->uid, i->gid, |
290 | !*name && type == 'd' ? "/" : name); | |
63cccae4 KZ |
291 | } |
292 | ||
293 | /* | |
294 | * Create a fake "blocked" access | |
295 | */ | |
296 | static void *romfs_read(unsigned long offset) | |
297 | { | |
298 | unsigned int block = offset >> ROMBUFFER_BITS; | |
299 | if (block != read_buffer_block) { | |
52848780 KZ |
300 | ssize_t x; |
301 | ||
63cccae4 | 302 | read_buffer_block = block; |
b3f30f50 KZ |
303 | if (lseek(fd, block << ROMBUFFER_BITS, SEEK_SET) == (off_t) -1) |
304 | warn(_("seek failed")); | |
52848780 KZ |
305 | |
306 | x = read(fd, read_buffer, ROMBUFFERSIZE * 2); | |
307 | if (x < 0) | |
308 | warn(_("read romfs failed")); | |
63cccae4 KZ |
309 | } |
310 | return read_buffer + (offset & ROMBUFFERMASK); | |
311 | } | |
312 | ||
6ffd9b03 | 313 | static struct cramfs_inode *cramfs_iget(struct cramfs_inode *i) |
63cccae4 | 314 | { |
fc8dc410 | 315 | struct cramfs_inode *inode = xmalloc(sizeof(struct cramfs_inode)); |
19922f22 | 316 | |
fbaec83b | 317 | inode_to_host(cramfs_is_big_endian, i, inode); |
63cccae4 KZ |
318 | return inode; |
319 | } | |
320 | ||
321 | static struct cramfs_inode *iget(unsigned int ino) | |
322 | { | |
323 | return cramfs_iget(romfs_read(ino)); | |
324 | } | |
325 | ||
63cccae4 KZ |
326 | static void iput(struct cramfs_inode *inode) |
327 | { | |
328 | free(inode); | |
329 | } | |
63cccae4 KZ |
330 | |
331 | /* | |
19922f22 | 332 | * Return the offset of the root directory |
63cccae4 KZ |
333 | */ |
334 | static struct cramfs_inode *read_super(void) | |
335 | { | |
6ffd9b03 | 336 | struct cramfs_inode *root = cramfs_iget(&super.root); |
fbaec83b | 337 | unsigned long offset = root->offset << 2; |
19922f22 | 338 | |
fbaec83b | 339 | if (!S_ISDIR(root->mode)) |
70b604b8 | 340 | errx(FSCK_EX_UNCORRECTED, _("root inode is not directory")); |
19922f22 KZ |
341 | if (!(super.flags & CRAMFS_FLAG_SHIFTED_ROOT_OFFSET) && |
342 | ((offset != sizeof(struct cramfs_super)) && | |
6ffd9b03 | 343 | (offset != PAD_SIZE + sizeof(struct cramfs_super)))) { |
70b604b8 | 344 | errx(FSCK_EX_UNCORRECTED, _("bad root offset (%lu)"), offset); |
19922f22 | 345 | } |
fbaec83b | 346 | return root; |
63cccae4 KZ |
347 | } |
348 | ||
52848780 | 349 | static int uncompress_block(void *src, size_t len) |
63cccae4 KZ |
350 | { |
351 | int err; | |
352 | ||
353 | stream.next_in = src; | |
354 | stream.avail_in = len; | |
355 | ||
6ffd9b03 | 356 | stream.next_out = (unsigned char *)outbuffer; |
38141baf | 357 | stream.avail_out = blksize * 2; |
63cccae4 KZ |
358 | |
359 | inflateReset(&stream); | |
360 | ||
38141baf | 361 | if (len > blksize * 2) |
70b604b8 | 362 | errx(FSCK_EX_UNCORRECTED, _("data block too large")); |
6ffd9b03 | 363 | |
63cccae4 | 364 | err = inflate(&stream, Z_FINISH); |
6ffd9b03 | 365 | if (err != Z_STREAM_END) |
52848780 KZ |
366 | errx(FSCK_EX_UNCORRECTED, _("decompression error: %s"), |
367 | zError(err)); | |
63cccae4 KZ |
368 | return stream.total_out; |
369 | } | |
370 | ||
48d7b13a KZ |
371 | #if !HAVE_LCHOWN |
372 | #define lchown chown | |
63cccae4 | 373 | #endif |
6ffd9b03 | 374 | |
7ee26cbf | 375 | static void do_uncompress(char *path, int outfd, unsigned long offset, |
6ffd9b03 | 376 | unsigned long size) |
19922f22 | 377 | { |
38141baf | 378 | unsigned long curr = offset + 4 * ((size + blksize - 1) / blksize); |
19922f22 KZ |
379 | |
380 | do { | |
38141baf | 381 | unsigned long out = blksize; |
6ffd9b03 SK |
382 | unsigned long next = u32_toggle_endianness(cramfs_is_big_endian, |
383 | *(uint32_t *) | |
384 | romfs_read(offset)); | |
19922f22 | 385 | |
6ffd9b03 | 386 | if (next > end_data) |
19922f22 | 387 | end_data = next; |
19922f22 KZ |
388 | |
389 | offset += 4; | |
390 | if (curr == next) { | |
6ffd9b03 | 391 | if (opt_verbose > 1) |
e3ca1312 | 392 | printf(_(" hole at %lu (%zu)\n"), curr, |
38141baf RM |
393 | blksize); |
394 | if (size < blksize) | |
19922f22 KZ |
395 | out = size; |
396 | memset(outbuffer, 0x00, out); | |
6ffd9b03 SK |
397 | } else { |
398 | if (opt_verbose > 1) | |
e3ca1312 | 399 | printf(_(" uncompressing block at %lu to %lu (%lu)\n"), |
6ffd9b03 | 400 | curr, next, next - curr); |
19922f22 KZ |
401 | out = uncompress_block(romfs_read(curr), next - curr); |
402 | } | |
38141baf RM |
403 | if (size >= blksize) { |
404 | if (out != blksize) | |
70b604b8 | 405 | errx(FSCK_EX_UNCORRECTED, |
6ffd9b03 | 406 | _("non-block (%ld) bytes"), out); |
19922f22 | 407 | } else { |
6ffd9b03 | 408 | if (out != size) |
70b604b8 | 409 | errx(FSCK_EX_UNCORRECTED, |
6ffd9b03 SK |
410 | _("non-size (%ld vs %ld) bytes"), out, |
411 | size); | |
19922f22 KZ |
412 | } |
413 | size -= out; | |
74ce680a SK |
414 | if (*extract_dir != '\0' && write(outfd, outbuffer, out) < 0) |
415 | err(FSCK_EX_ERROR, _("write failed: %s"), path); | |
19922f22 KZ |
416 | curr = next; |
417 | } while (size); | |
418 | } | |
63cccae4 KZ |
419 | static void change_file_status(char *path, struct cramfs_inode *i) |
420 | { | |
12d12102 | 421 | const struct timeval epoch[] = { {0,0}, {0,0} }; |
63cccae4 KZ |
422 | |
423 | if (euid == 0) { | |
6ffd9b03 | 424 | if (lchown(path, i->uid, i->gid) < 0) |
70b604b8 | 425 | err(FSCK_EX_ERROR, _("lchown failed: %s"), path); |
63cccae4 KZ |
426 | if (S_ISLNK(i->mode)) |
427 | return; | |
6ffd9b03 | 428 | if (((S_ISUID | S_ISGID) & i->mode) && chmod(path, i->mode) < 0) |
70b604b8 | 429 | err(FSCK_EX_ERROR, _("chown failed: %s"), path); |
63cccae4 KZ |
430 | } |
431 | if (S_ISLNK(i->mode)) | |
432 | return; | |
12d12102 | 433 | if (utimes(path, epoch) < 0) |
ad7ac3d5 | 434 | err(FSCK_EX_ERROR, _("utimes failed: %s"), path); |
19922f22 KZ |
435 | } |
436 | ||
437 | static void do_directory(char *path, struct cramfs_inode *i) | |
438 | { | |
439 | int pathlen = strlen(path); | |
440 | int count = i->size; | |
441 | unsigned long offset = i->offset << 2; | |
fc8dc410 | 442 | char *newpath = xmalloc(pathlen + 256); |
19922f22 | 443 | |
6ffd9b03 | 444 | if (offset == 0 && count != 0) |
70b604b8 | 445 | errx(FSCK_EX_UNCORRECTED, |
6ffd9b03 SK |
446 | _("directory inode has zero offset and non-zero size: %s"), |
447 | path); | |
448 | ||
449 | if (offset != 0 && offset < start_dir) | |
19922f22 | 450 | start_dir = offset; |
6ffd9b03 | 451 | |
19922f22 KZ |
452 | /* TODO: Do we need to check end_dir for empty case? */ |
453 | memcpy(newpath, path, pathlen); | |
454 | newpath[pathlen] = '/'; | |
455 | pathlen++; | |
6ffd9b03 | 456 | if (opt_verbose) |
19922f22 | 457 | print_node('d', i, path); |
6ffd9b03 | 458 | |
2d317f11 | 459 | if (*extract_dir != '\0') { |
6ffd9b03 | 460 | if (mkdir(path, i->mode) < 0) |
70b604b8 | 461 | err(FSCK_EX_ERROR, _("mkdir failed: %s"), path); |
19922f22 KZ |
462 | change_file_status(path, i); |
463 | } | |
464 | while (count > 0) { | |
465 | struct cramfs_inode *child = iget(offset); | |
466 | int size; | |
467 | int newlen = child->namelen << 2; | |
468 | ||
469 | size = sizeof(struct cramfs_inode) + newlen; | |
470 | count -= size; | |
471 | ||
472 | offset += sizeof(struct cramfs_inode); | |
473 | ||
474 | memcpy(newpath + pathlen, romfs_read(offset), newlen); | |
475 | newpath[pathlen + newlen] = 0; | |
6ffd9b03 | 476 | if (newlen == 0) |
70b604b8 | 477 | errx(FSCK_EX_UNCORRECTED, _("filename length is zero")); |
6ffd9b03 | 478 | if ((pathlen + newlen) - strlen(newpath) > 3) |
70b604b8 | 479 | errx(FSCK_EX_UNCORRECTED, _("bad filename length")); |
19922f22 KZ |
480 | expand_fs(newpath, child); |
481 | ||
482 | offset += newlen; | |
483 | ||
6ffd9b03 | 484 | if (offset <= start_dir) |
70b604b8 | 485 | errx(FSCK_EX_UNCORRECTED, _("bad inode offset")); |
6ffd9b03 | 486 | if (offset > end_dir) |
19922f22 | 487 | end_dir = offset; |
6ffd9b03 | 488 | iput(child); /* free(child) */ |
19922f22 KZ |
489 | } |
490 | free(newpath); | |
491 | } | |
492 | ||
493 | static void do_file(char *path, struct cramfs_inode *i) | |
494 | { | |
495 | unsigned long offset = i->offset << 2; | |
7ee26cbf | 496 | int outfd = 0; |
19922f22 | 497 | |
6ffd9b03 | 498 | if (offset == 0 && i->size != 0) |
70b604b8 | 499 | errx(FSCK_EX_UNCORRECTED, |
6ffd9b03 SK |
500 | _("file inode has zero offset and non-zero size")); |
501 | if (i->size == 0 && offset != 0) | |
70b604b8 | 502 | errx(FSCK_EX_UNCORRECTED, |
6ffd9b03 SK |
503 | _("file inode has zero size and non-zero offset")); |
504 | if (offset != 0 && offset < start_data) | |
19922f22 | 505 | start_data = offset; |
6ffd9b03 | 506 | if (opt_verbose) |
19922f22 | 507 | print_node('f', i, path); |
2d317f11 | 508 | if (*extract_dir != '\0') { |
7ee26cbf SK |
509 | outfd = open(path, O_WRONLY | O_CREAT | O_TRUNC, i->mode); |
510 | if (outfd < 0) | |
289dcc90 | 511 | err(FSCK_EX_ERROR, _("cannot open %s"), path); |
19922f22 | 512 | } |
6ffd9b03 | 513 | if (i->size) |
7ee26cbf | 514 | do_uncompress(path, outfd, offset, i->size); |
2d317f11 | 515 | if ( *extract_dir != '\0') { |
7ee26cbf | 516 | if (close_fd(outfd) != 0) |
83f210e8 | 517 | err(FSCK_EX_ERROR, _("write failed: %s"), path); |
19922f22 | 518 | change_file_status(path, i); |
63cccae4 KZ |
519 | } |
520 | } | |
521 | ||
522 | static void do_symlink(char *path, struct cramfs_inode *i) | |
523 | { | |
524 | unsigned long offset = i->offset << 2; | |
525 | unsigned long curr = offset + 4; | |
6ffd9b03 SK |
526 | unsigned long next = |
527 | u32_toggle_endianness(cramfs_is_big_endian, | |
528 | *(uint32_t *) romfs_read(offset)); | |
63cccae4 KZ |
529 | unsigned long size; |
530 | ||
6ffd9b03 | 531 | if (offset == 0) |
70b604b8 | 532 | errx(FSCK_EX_UNCORRECTED, _("symbolic link has zero offset")); |
6ffd9b03 | 533 | if (i->size == 0) |
70b604b8 | 534 | errx(FSCK_EX_UNCORRECTED, _("symbolic link has zero size")); |
19922f22 | 535 | |
6ffd9b03 | 536 | if (offset < start_data) |
19922f22 | 537 | start_data = offset; |
6ffd9b03 | 538 | if (next > end_data) |
63cccae4 | 539 | end_data = next; |
63cccae4 KZ |
540 | |
541 | size = uncompress_block(romfs_read(curr), next - curr); | |
6ffd9b03 | 542 | if (size != i->size) |
70b604b8 | 543 | errx(FSCK_EX_UNCORRECTED, _("size error in symlink: %s"), path); |
63cccae4 KZ |
544 | outbuffer[size] = 0; |
545 | if (opt_verbose) { | |
546 | char *str; | |
547 | ||
6f312c89 | 548 | xasprintf(&str, "%s -> %s", path, outbuffer); |
63cccae4 | 549 | print_node('l', i, str); |
6ffd9b03 | 550 | if (opt_verbose > 1) |
e3ca1312 | 551 | printf(_(" uncompressing block at %lu to %lu (%lu)\n"), |
6ffd9b03 | 552 | curr, next, next - curr); |
19922f22 | 553 | free(str); |
63cccae4 | 554 | } |
2d317f11 | 555 | if (*extract_dir != '\0') { |
6ffd9b03 | 556 | if (symlink(outbuffer, path) < 0) |
70b604b8 | 557 | err(FSCK_EX_ERROR, _("symlink failed: %s"), path); |
63cccae4 KZ |
558 | change_file_status(path, i); |
559 | } | |
560 | } | |
561 | ||
562 | static void do_special_inode(char *path, struct cramfs_inode *i) | |
563 | { | |
564 | dev_t devtype = 0; | |
565 | char type; | |
566 | ||
6ffd9b03 SK |
567 | if (i->offset) |
568 | /* no need to shift offset */ | |
70b604b8 | 569 | errx(FSCK_EX_UNCORRECTED, |
6ffd9b03 SK |
570 | _("special file has non-zero offset: %s"), path); |
571 | ||
63cccae4 KZ |
572 | if (S_ISCHR(i->mode)) { |
573 | devtype = i->size; | |
574 | type = 'c'; | |
6ffd9b03 | 575 | } else if (S_ISBLK(i->mode)) { |
63cccae4 KZ |
576 | devtype = i->size; |
577 | type = 'b'; | |
6ffd9b03 SK |
578 | } else if (S_ISFIFO(i->mode)) { |
579 | if (i->size != 0) | |
70b604b8 | 580 | errx(FSCK_EX_UNCORRECTED, _("fifo has non-zero size: %s"), |
6ffd9b03 | 581 | path); |
63cccae4 | 582 | type = 'p'; |
6ffd9b03 SK |
583 | } else if (S_ISSOCK(i->mode)) { |
584 | if (i->size != 0) | |
70b604b8 | 585 | errx(FSCK_EX_UNCORRECTED, |
6ffd9b03 | 586 | _("socket has non-zero size: %s"), path); |
63cccae4 | 587 | type = 's'; |
6ffd9b03 | 588 | } else { |
70b604b8 | 589 | errx(FSCK_EX_UNCORRECTED, _("bogus mode: %s (%o)"), path, i->mode); |
19922f22 | 590 | return; /* not reached */ |
63cccae4 KZ |
591 | } |
592 | ||
6ffd9b03 | 593 | if (opt_verbose) |
63cccae4 | 594 | print_node(type, i, path); |
63cccae4 | 595 | |
2d317f11 | 596 | if (*extract_dir != '\0') { |
6ffd9b03 | 597 | if (mknod(path, i->mode, devtype) < 0) |
70b604b8 | 598 | err(FSCK_EX_ERROR, _("mknod failed: %s"), path); |
63cccae4 KZ |
599 | change_file_status(path, i); |
600 | } | |
601 | } | |
602 | ||
19922f22 | 603 | static void expand_fs(char *path, struct cramfs_inode *inode) |
63cccae4 | 604 | { |
6ffd9b03 | 605 | if (S_ISDIR(inode->mode)) |
19922f22 | 606 | do_directory(path, inode); |
6ffd9b03 | 607 | else if (S_ISREG(inode->mode)) |
19922f22 | 608 | do_file(path, inode); |
6ffd9b03 | 609 | else if (S_ISLNK(inode->mode)) |
19922f22 | 610 | do_symlink(path, inode); |
6ffd9b03 | 611 | else |
19922f22 | 612 | do_special_inode(path, inode); |
63cccae4 KZ |
613 | } |
614 | ||
19922f22 | 615 | static void test_fs(int start) |
63cccae4 | 616 | { |
19922f22 | 617 | struct cramfs_inode *root; |
63cccae4 | 618 | |
19922f22 KZ |
619 | root = read_super(); |
620 | umask(0); | |
621 | euid = geteuid(); | |
622 | stream.next_in = NULL; | |
623 | stream.avail_in = 0; | |
624 | inflateInit(&stream); | |
625 | expand_fs(extract_dir, root); | |
626 | inflateEnd(&stream); | |
627 | if (start_data != ~0UL) { | |
6ffd9b03 | 628 | if (start_data < (sizeof(struct cramfs_super) + start)) |
70b604b8 | 629 | errx(FSCK_EX_UNCORRECTED, |
60cb2c37 | 630 | _("directory data start (%lu) < sizeof(struct cramfs_super) + start (%zu)"), |
6ffd9b03 SK |
631 | start_data, sizeof(struct cramfs_super) + start); |
632 | if (end_dir != start_data) | |
70b604b8 | 633 | errx(FSCK_EX_UNCORRECTED, |
60cb2c37 | 634 | _("directory data end (%lu) != file data start (%lu)"), |
6ffd9b03 SK |
635 | end_dir, start_data); |
636 | } | |
74ce680a SK |
637 | if (super.flags & CRAMFS_FLAG_FSID_VERSION_2 && end_data > super.size) |
638 | errx(FSCK_EX_UNCORRECTED, _("invalid file data offset")); | |
6ffd9b03 | 639 | |
19922f22 | 640 | iput(root); /* free(root) */ |
63cccae4 | 641 | } |
63cccae4 KZ |
642 | |
643 | int main(int argc, char **argv) | |
644 | { | |
63cccae4 KZ |
645 | int c; /* for getopt */ |
646 | int start = 0; | |
293889d0 | 647 | size_t length = 0; |
19922f22 | 648 | |
922ec175 | 649 | static const struct option longopts[] = { |
87918040 SK |
650 | {"verbose", no_argument, NULL, 'v'}, |
651 | {"version", no_argument, NULL, 'V'}, | |
652 | {"help", no_argument, NULL, 'h'}, | |
653 | {"blocksize", required_argument, NULL, 'b'}, | |
654 | {"extract", optional_argument, NULL, 'x'}, | |
655 | {NULL, 0, NULL, 0}, | |
922ec175 SK |
656 | }; |
657 | ||
e56644ca | 658 | setlocale(LC_MESSAGES, ""); |
5d4ece6e | 659 | setlocale(LC_CTYPE, ""); |
e56644ca PR |
660 | bindtextdomain(PACKAGE, LOCALEDIR); |
661 | textdomain(PACKAGE); | |
2c308875 | 662 | close_stdout_atexit(); |
e56644ca | 663 | |
0b2b32e8 RM |
664 | strutils_set_exitcode(FSCK_EX_USAGE); |
665 | ||
63cccae4 | 666 | /* command line options */ |
2d317f11 | 667 | while ((c = getopt_long(argc, argv, "ayvVhb:", longopts, NULL)) != EOF) |
63cccae4 | 668 | switch (c) { |
6bf463c5 KZ |
669 | case 'a': /* ignore */ |
670 | case 'y': | |
671 | break; | |
63cccae4 | 672 | case 'h': |
5118d1be | 673 | usage(); |
e4a36b8b | 674 | break; |
922ec175 | 675 | case 'V': |
2c308875 | 676 | print_version(FSCK_EX_OK); |
63cccae4 | 677 | case 'x': |
63cccae4 | 678 | opt_extract = 1; |
2d317f11 RM |
679 | if(optarg) |
680 | extract_dir = optarg; | |
63cccae4 | 681 | break; |
63cccae4 KZ |
682 | case 'v': |
683 | opt_verbose++; | |
684 | break; | |
5cd50ebc | 685 | case 'b': |
5cd50ebc | 686 | blksize = strtou32_or_err(optarg, _("invalid blocksize argument")); |
5cd50ebc | 687 | break; |
de173766 | 688 | default: |
677ec86c | 689 | errtryhelp(FSCK_EX_USAGE); |
63cccae4 | 690 | } |
63cccae4 | 691 | |
5118d1be RM |
692 | if ((argc - optind) != 1){ |
693 | warnx(_("bad usage")); | |
694 | errtryhelp(FSCK_EX_USAGE); | |
695 | } | |
63cccae4 KZ |
696 | filename = argv[optind]; |
697 | ||
19922f22 KZ |
698 | test_super(&start, &length); |
699 | test_crc(start); | |
34731f89 | 700 | |
2d317f11 RM |
701 | if(opt_extract) { |
702 | if (blksize == 0) | |
703 | blksize = getpagesize(); | |
704 | outbuffer = xmalloc(blksize * 2); | |
705 | test_fs(start); | |
706 | } | |
63cccae4 | 707 | |
6ffd9b03 | 708 | if (opt_verbose) |
6de1396e | 709 | printf(_("%s: OK\n"), filename); |
63cccae4 | 710 | |
70b604b8 | 711 | exit(FSCK_EX_OK); |
63cccae4 | 712 | } |