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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; | |
042f62df RP |
134 | } |
135 | ||
136 | if (magic == | |
6ffd9b03 | 137 | u32_toggle_endianness(!HOST_IS_BIG_ENDIAN, CRAMFS_MAGIC)) { |
fbaec83b SRP |
138 | cramfs_is_big_endian = !HOST_IS_BIG_ENDIAN; |
139 | return 0; | |
042f62df RP |
140 | } |
141 | ||
142 | return -1; | |
fbaec83b SRP |
143 | } |
144 | ||
6ffd9b03 SK |
145 | static void test_super(int *start, size_t * length) |
146 | { | |
19922f22 KZ |
147 | struct stat st; |
148 | ||
149 | /* find the physical size of the file or block device */ | |
6ffd9b03 | 150 | if (stat(filename, &st) < 0) |
fc14ceba | 151 | err(FSCK_EX_ERROR, _("stat of %s failed"), filename); |
6ffd9b03 | 152 | |
19922f22 | 153 | fd = open(filename, O_RDONLY); |
6ffd9b03 | 154 | if (fd < 0) |
289dcc90 | 155 | err(FSCK_EX_ERROR, _("cannot open %s"), filename); |
6ffd9b03 | 156 | |
19922f22 | 157 | if (S_ISBLK(st.st_mode)) { |
098fa6b1 | 158 | unsigned long long bytes; |
6ffd9b03 | 159 | if (blkdev_get_size(fd, &bytes)) |
70b604b8 | 160 | err(FSCK_EX_ERROR, |
6ffd9b03 SK |
161 | _("ioctl failed: unable to determine device size: %s"), |
162 | filename); | |
098fa6b1 | 163 | *length = bytes; |
6ffd9b03 | 164 | } else if (S_ISREG(st.st_mode)) |
19922f22 | 165 | *length = st.st_size; |
6ffd9b03 | 166 | else |
70b604b8 | 167 | errx(FSCK_EX_ERROR, _("not a block device or file: %s"), filename); |
19922f22 | 168 | |
6ffd9b03 | 169 | if (*length < sizeof(struct cramfs_super)) |
70b604b8 | 170 | errx(FSCK_EX_UNCORRECTED, _("file length too short")); |
19922f22 KZ |
171 | |
172 | /* find superblock */ | |
6ffd9b03 | 173 | if (read(fd, &super, sizeof(super)) != sizeof(super)) |
47481cbd | 174 | err(FSCK_EX_ERROR, _("cannot read %s"), filename); |
6ffd9b03 | 175 | if (get_superblock_endianness(super.magic) != -1) |
19922f22 | 176 | *start = 0; |
19922f22 | 177 | else if (*length >= (PAD_SIZE + sizeof(super))) { |
b3f30f50 | 178 | if (lseek(fd, PAD_SIZE, SEEK_SET) == (off_t) -1) |
47481cbd | 179 | err(FSCK_EX_ERROR, _("seek on %s failed"), filename); |
6ffd9b03 | 180 | if (read(fd, &super, sizeof(super)) != sizeof(super)) |
47481cbd | 181 | err(FSCK_EX_ERROR, _("cannot read %s"), filename); |
6ffd9b03 | 182 | if (get_superblock_endianness(super.magic) != -1) |
19922f22 | 183 | *start = PAD_SIZE; |
6ffd9b03 | 184 | else |
70b604b8 | 185 | errx(FSCK_EX_UNCORRECTED, _("superblock magic not found")); |
6ffd9b03 | 186 | } else |
70b604b8 | 187 | errx(FSCK_EX_UNCORRECTED, _("superblock magic not found")); |
fbaec83b | 188 | |
6ffd9b03 | 189 | if (opt_verbose) |
6de1396e SK |
190 | printf(_("cramfs endianness is %s\n"), |
191 | cramfs_is_big_endian ? _("big") : _("little")); | |
fbaec83b SRP |
192 | |
193 | super_toggle_endianness(cramfs_is_big_endian, &super); | |
6ffd9b03 | 194 | if (super.flags & ~CRAMFS_SUPPORTED_FLAGS) |
70b604b8 | 195 | errx(FSCK_EX_ERROR, _("unsupported filesystem features")); |
6ffd9b03 | 196 | |
f991dbd3 | 197 | /* What are valid superblock sizes? */ |
2374b1ab | 198 | if (super.size < *start + sizeof(struct cramfs_super)) |
70b604b8 | 199 | errx(FSCK_EX_UNCORRECTED, _("superblock size (%d) too small"), |
6ffd9b03 SK |
200 | super.size); |
201 | ||
19922f22 | 202 | if (super.flags & CRAMFS_FLAG_FSID_VERSION_2) { |
6ffd9b03 | 203 | if (super.fsid.files == 0) |
70b604b8 | 204 | errx(FSCK_EX_UNCORRECTED, _("zero file count")); |
6ffd9b03 | 205 | if (*length < super.size) |
70b604b8 | 206 | errx(FSCK_EX_UNCORRECTED, _("file length too short")); |
6ffd9b03 | 207 | else if (*length > super.size) |
deedae5f | 208 | warnx(_("file extends past end of filesystem")); |
6ffd9b03 | 209 | } else |
deedae5f | 210 | warnx(_("old cramfs format")); |
19922f22 KZ |
211 | } |
212 | ||
213 | static void test_crc(int start) | |
214 | { | |
215 | void *buf; | |
d51f37a3 | 216 | uint32_t crc; |
19922f22 KZ |
217 | |
218 | if (!(super.flags & CRAMFS_FLAG_FSID_VERSION_2)) { | |
deedae5f | 219 | warnx(_("unable to test CRC: old cramfs format")); |
19922f22 | 220 | return; |
19922f22 KZ |
221 | } |
222 | ||
87918040 | 223 | crc = crc32(0L, NULL, 0); |
19922f22 | 224 | |
6ffd9b03 | 225 | buf = |
919e372d | 226 | mmap(NULL, super.size, PROT_READ | PROT_WRITE, MAP_PRIVATE, fd, 0); |
19922f22 | 227 | if (buf == MAP_FAILED) { |
6ffd9b03 | 228 | buf = |
919e372d | 229 | mmap(NULL, super.size, PROT_READ | PROT_WRITE, |
6ffd9b03 | 230 | MAP_PRIVATE | MAP_ANONYMOUS, -1, 0); |
19922f22 | 231 | if (buf != MAP_FAILED) { |
68ac4269 | 232 | ssize_t tmp; |
919e372d | 233 | if (lseek(fd, 0, SEEK_SET) == (off_t) -1) |
47481cbd | 234 | err(FSCK_EX_ERROR, _("seek on %s failed"), filename); |
68ac4269 RM |
235 | tmp = read(fd, buf, super.size); |
236 | if (tmp < 0) | |
47481cbd | 237 | err(FSCK_EX_ERROR, _("cannot read %s"), filename); |
68ac4269 RM |
238 | if (tmp != (ssize_t) super.size) |
239 | errx(FSCK_EX_ERROR, _("failed to read %"PRIu32" bytes from file %s"), | |
240 | super.size, filename); | |
19922f22 KZ |
241 | } |
242 | } | |
243 | if (buf != MAP_FAILED) { | |
aa719998 | 244 | ((struct cramfs_super *)((unsigned char *) buf + start))->fsid.crc = |
87918040 | 245 | crc32(0L, NULL, 0); |
919e372d RM |
246 | crc = crc32(crc, (unsigned char *) buf + start, super.size - start); |
247 | munmap(buf, super.size); | |
6ffd9b03 | 248 | } else { |
19922f22 KZ |
249 | int retval; |
250 | size_t length = 0; | |
251 | ||
fc8dc410 | 252 | buf = xmalloc(4096); |
b3f30f50 | 253 | if (lseek(fd, start, SEEK_SET) == (off_t) -1) |
47481cbd | 254 | err(FSCK_EX_ERROR, _("seek on %s failed"), filename); |
19922f22 KZ |
255 | for (;;) { |
256 | retval = read(fd, buf, 4096); | |
6ffd9b03 | 257 | if (retval < 0) |
47481cbd | 258 | err(FSCK_EX_ERROR, _("cannot read %s"), filename); |
6ffd9b03 | 259 | else if (retval == 0) |
19922f22 | 260 | break; |
6ffd9b03 SK |
261 | if (length == 0) |
262 | ((struct cramfs_super *)buf)->fsid.crc = | |
87918040 | 263 | crc32(0L, NULL, 0); |
19922f22 | 264 | length += retval; |
6ffd9b03 | 265 | if (length > (super.size - start)) { |
2687686c | 266 | crc = crc32(crc, buf, |
6ffd9b03 SK |
267 | retval - (length - |
268 | (super.size - start))); | |
19922f22 KZ |
269 | break; |
270 | } | |
2687686c | 271 | crc = crc32(crc, buf, retval); |
19922f22 KZ |
272 | } |
273 | free(buf); | |
274 | } | |
275 | ||
6ffd9b03 | 276 | if (crc != super.fsid.crc) |
70b604b8 | 277 | errx(FSCK_EX_UNCORRECTED, _("crc error")); |
19922f22 KZ |
278 | } |
279 | ||
63cccae4 KZ |
280 | static void print_node(char type, struct cramfs_inode *i, char *name) |
281 | { | |
282 | char info[10]; | |
283 | ||
6ffd9b03 | 284 | if (S_ISCHR(i->mode) || (S_ISBLK(i->mode))) |
63cccae4 KZ |
285 | /* major/minor numbers can be as high as 2^12 or 4096 */ |
286 | snprintf(info, 10, "%4d,%4d", major(i->size), minor(i->size)); | |
6ffd9b03 | 287 | else |
63cccae4 KZ |
288 | /* size be as high as 2^24 or 16777216 */ |
289 | snprintf(info, 10, "%9d", i->size); | |
63cccae4 KZ |
290 | |
291 | printf("%c %04o %s %5d:%-3d %s\n", | |
a6f72ab4 KZ |
292 | type, i->mode & ~S_IFMT, info, i->uid, i->gid, |
293 | !*name && type == 'd' ? "/" : name); | |
63cccae4 KZ |
294 | } |
295 | ||
296 | /* | |
297 | * Create a fake "blocked" access | |
298 | */ | |
299 | static void *romfs_read(unsigned long offset) | |
300 | { | |
301 | unsigned int block = offset >> ROMBUFFER_BITS; | |
302 | if (block != read_buffer_block) { | |
52848780 KZ |
303 | ssize_t x; |
304 | ||
63cccae4 | 305 | read_buffer_block = block; |
b3f30f50 KZ |
306 | if (lseek(fd, block << ROMBUFFER_BITS, SEEK_SET) == (off_t) -1) |
307 | warn(_("seek failed")); | |
52848780 KZ |
308 | |
309 | x = read(fd, read_buffer, ROMBUFFERSIZE * 2); | |
310 | if (x < 0) | |
311 | warn(_("read romfs failed")); | |
63cccae4 KZ |
312 | } |
313 | return read_buffer + (offset & ROMBUFFERMASK); | |
314 | } | |
315 | ||
6ffd9b03 | 316 | static struct cramfs_inode *cramfs_iget(struct cramfs_inode *i) |
63cccae4 | 317 | { |
fc8dc410 | 318 | struct cramfs_inode *inode = xmalloc(sizeof(struct cramfs_inode)); |
19922f22 | 319 | |
fbaec83b | 320 | inode_to_host(cramfs_is_big_endian, i, inode); |
63cccae4 KZ |
321 | return inode; |
322 | } | |
323 | ||
324 | static struct cramfs_inode *iget(unsigned int ino) | |
325 | { | |
326 | return cramfs_iget(romfs_read(ino)); | |
327 | } | |
328 | ||
63cccae4 KZ |
329 | static void iput(struct cramfs_inode *inode) |
330 | { | |
331 | free(inode); | |
332 | } | |
63cccae4 KZ |
333 | |
334 | /* | |
19922f22 | 335 | * Return the offset of the root directory |
63cccae4 KZ |
336 | */ |
337 | static struct cramfs_inode *read_super(void) | |
338 | { | |
6ffd9b03 | 339 | struct cramfs_inode *root = cramfs_iget(&super.root); |
fbaec83b | 340 | unsigned long offset = root->offset << 2; |
19922f22 | 341 | |
fbaec83b | 342 | if (!S_ISDIR(root->mode)) |
70b604b8 | 343 | errx(FSCK_EX_UNCORRECTED, _("root inode is not directory")); |
19922f22 KZ |
344 | if (!(super.flags & CRAMFS_FLAG_SHIFTED_ROOT_OFFSET) && |
345 | ((offset != sizeof(struct cramfs_super)) && | |
6ffd9b03 | 346 | (offset != PAD_SIZE + sizeof(struct cramfs_super)))) { |
70b604b8 | 347 | errx(FSCK_EX_UNCORRECTED, _("bad root offset (%lu)"), offset); |
19922f22 | 348 | } |
fbaec83b | 349 | return root; |
63cccae4 KZ |
350 | } |
351 | ||
52848780 | 352 | static int uncompress_block(void *src, size_t len) |
63cccae4 KZ |
353 | { |
354 | int err; | |
355 | ||
356 | stream.next_in = src; | |
357 | stream.avail_in = len; | |
358 | ||
6ffd9b03 | 359 | stream.next_out = (unsigned char *)outbuffer; |
38141baf | 360 | stream.avail_out = blksize * 2; |
63cccae4 KZ |
361 | |
362 | inflateReset(&stream); | |
363 | ||
38141baf | 364 | if (len > blksize * 2) |
70b604b8 | 365 | errx(FSCK_EX_UNCORRECTED, _("data block too large")); |
6ffd9b03 | 366 | |
63cccae4 | 367 | err = inflate(&stream, Z_FINISH); |
6ffd9b03 | 368 | if (err != Z_STREAM_END) |
52848780 KZ |
369 | errx(FSCK_EX_UNCORRECTED, _("decompression error: %s"), |
370 | zError(err)); | |
63cccae4 KZ |
371 | return stream.total_out; |
372 | } | |
373 | ||
d52786aa | 374 | #ifndef HAVE_LCHOWN |
48d7b13a | 375 | #define lchown chown |
63cccae4 | 376 | #endif |
6ffd9b03 | 377 | |
7ee26cbf | 378 | static void do_uncompress(char *path, int outfd, unsigned long offset, |
6ffd9b03 | 379 | unsigned long size) |
19922f22 | 380 | { |
38141baf | 381 | unsigned long curr = offset + 4 * ((size + blksize - 1) / blksize); |
19922f22 KZ |
382 | |
383 | do { | |
38141baf | 384 | unsigned long out = blksize; |
6ffd9b03 SK |
385 | unsigned long next = u32_toggle_endianness(cramfs_is_big_endian, |
386 | *(uint32_t *) | |
387 | romfs_read(offset)); | |
19922f22 | 388 | |
6ffd9b03 | 389 | if (next > end_data) |
19922f22 | 390 | end_data = next; |
19922f22 KZ |
391 | |
392 | offset += 4; | |
393 | if (curr == next) { | |
6ffd9b03 | 394 | if (opt_verbose > 1) |
e3ca1312 | 395 | printf(_(" hole at %lu (%zu)\n"), curr, |
38141baf RM |
396 | blksize); |
397 | if (size < blksize) | |
19922f22 KZ |
398 | out = size; |
399 | memset(outbuffer, 0x00, out); | |
6ffd9b03 SK |
400 | } else { |
401 | if (opt_verbose > 1) | |
e3ca1312 | 402 | printf(_(" uncompressing block at %lu to %lu (%lu)\n"), |
6ffd9b03 | 403 | curr, next, next - curr); |
19922f22 KZ |
404 | out = uncompress_block(romfs_read(curr), next - curr); |
405 | } | |
38141baf RM |
406 | if (size >= blksize) { |
407 | if (out != blksize) | |
70b604b8 | 408 | errx(FSCK_EX_UNCORRECTED, |
6ffd9b03 | 409 | _("non-block (%ld) bytes"), out); |
19922f22 | 410 | } else { |
6ffd9b03 | 411 | if (out != size) |
70b604b8 | 412 | errx(FSCK_EX_UNCORRECTED, |
6ffd9b03 SK |
413 | _("non-size (%ld vs %ld) bytes"), out, |
414 | size); | |
19922f22 KZ |
415 | } |
416 | size -= out; | |
74ce680a SK |
417 | if (*extract_dir != '\0' && write(outfd, outbuffer, out) < 0) |
418 | err(FSCK_EX_ERROR, _("write failed: %s"), path); | |
19922f22 KZ |
419 | curr = next; |
420 | } while (size); | |
421 | } | |
63cccae4 KZ |
422 | static void change_file_status(char *path, struct cramfs_inode *i) |
423 | { | |
12d12102 | 424 | const struct timeval epoch[] = { {0,0}, {0,0} }; |
63cccae4 KZ |
425 | |
426 | if (euid == 0) { | |
6ffd9b03 | 427 | if (lchown(path, i->uid, i->gid) < 0) |
70b604b8 | 428 | err(FSCK_EX_ERROR, _("lchown failed: %s"), path); |
63cccae4 KZ |
429 | if (S_ISLNK(i->mode)) |
430 | return; | |
6ffd9b03 | 431 | if (((S_ISUID | S_ISGID) & i->mode) && chmod(path, i->mode) < 0) |
70b604b8 | 432 | err(FSCK_EX_ERROR, _("chown failed: %s"), path); |
63cccae4 KZ |
433 | } |
434 | if (S_ISLNK(i->mode)) | |
435 | return; | |
12d12102 | 436 | if (utimes(path, epoch) < 0) |
ad7ac3d5 | 437 | err(FSCK_EX_ERROR, _("utimes failed: %s"), path); |
19922f22 KZ |
438 | } |
439 | ||
440 | static void do_directory(char *path, struct cramfs_inode *i) | |
441 | { | |
442 | int pathlen = strlen(path); | |
443 | int count = i->size; | |
444 | unsigned long offset = i->offset << 2; | |
fc8dc410 | 445 | char *newpath = xmalloc(pathlen + 256); |
19922f22 | 446 | |
6ffd9b03 | 447 | if (offset == 0 && count != 0) |
70b604b8 | 448 | errx(FSCK_EX_UNCORRECTED, |
6ffd9b03 SK |
449 | _("directory inode has zero offset and non-zero size: %s"), |
450 | path); | |
451 | ||
452 | if (offset != 0 && offset < start_dir) | |
19922f22 | 453 | start_dir = offset; |
6ffd9b03 | 454 | |
19922f22 KZ |
455 | /* TODO: Do we need to check end_dir for empty case? */ |
456 | memcpy(newpath, path, pathlen); | |
457 | newpath[pathlen] = '/'; | |
458 | pathlen++; | |
6ffd9b03 | 459 | if (opt_verbose) |
19922f22 | 460 | print_node('d', i, path); |
6ffd9b03 | 461 | |
2d317f11 | 462 | if (*extract_dir != '\0') { |
6ffd9b03 | 463 | if (mkdir(path, i->mode) < 0) |
70b604b8 | 464 | err(FSCK_EX_ERROR, _("mkdir failed: %s"), path); |
19922f22 KZ |
465 | change_file_status(path, i); |
466 | } | |
467 | while (count > 0) { | |
468 | struct cramfs_inode *child = iget(offset); | |
469 | int size; | |
470 | int newlen = child->namelen << 2; | |
471 | ||
472 | size = sizeof(struct cramfs_inode) + newlen; | |
473 | count -= size; | |
474 | ||
475 | offset += sizeof(struct cramfs_inode); | |
476 | ||
477 | memcpy(newpath + pathlen, romfs_read(offset), newlen); | |
478 | newpath[pathlen + newlen] = 0; | |
6ffd9b03 | 479 | if (newlen == 0) |
70b604b8 | 480 | errx(FSCK_EX_UNCORRECTED, _("filename length is zero")); |
6ffd9b03 | 481 | if ((pathlen + newlen) - strlen(newpath) > 3) |
70b604b8 | 482 | errx(FSCK_EX_UNCORRECTED, _("bad filename length")); |
19922f22 KZ |
483 | expand_fs(newpath, child); |
484 | ||
485 | offset += newlen; | |
486 | ||
6ffd9b03 | 487 | if (offset <= start_dir) |
70b604b8 | 488 | errx(FSCK_EX_UNCORRECTED, _("bad inode offset")); |
6ffd9b03 | 489 | if (offset > end_dir) |
19922f22 | 490 | end_dir = offset; |
6ffd9b03 | 491 | iput(child); /* free(child) */ |
19922f22 KZ |
492 | } |
493 | free(newpath); | |
494 | } | |
495 | ||
496 | static void do_file(char *path, struct cramfs_inode *i) | |
497 | { | |
498 | unsigned long offset = i->offset << 2; | |
7ee26cbf | 499 | int outfd = 0; |
19922f22 | 500 | |
6ffd9b03 | 501 | if (offset == 0 && i->size != 0) |
70b604b8 | 502 | errx(FSCK_EX_UNCORRECTED, |
6ffd9b03 SK |
503 | _("file inode has zero offset and non-zero size")); |
504 | if (i->size == 0 && offset != 0) | |
70b604b8 | 505 | errx(FSCK_EX_UNCORRECTED, |
6ffd9b03 SK |
506 | _("file inode has zero size and non-zero offset")); |
507 | if (offset != 0 && offset < start_data) | |
19922f22 | 508 | start_data = offset; |
6ffd9b03 | 509 | if (opt_verbose) |
19922f22 | 510 | print_node('f', i, path); |
2d317f11 | 511 | if (*extract_dir != '\0') { |
7ee26cbf SK |
512 | outfd = open(path, O_WRONLY | O_CREAT | O_TRUNC, i->mode); |
513 | if (outfd < 0) | |
289dcc90 | 514 | err(FSCK_EX_ERROR, _("cannot open %s"), path); |
19922f22 | 515 | } |
6ffd9b03 | 516 | if (i->size) |
7ee26cbf | 517 | do_uncompress(path, outfd, offset, i->size); |
2d317f11 | 518 | if ( *extract_dir != '\0') { |
7ee26cbf | 519 | if (close_fd(outfd) != 0) |
83f210e8 | 520 | err(FSCK_EX_ERROR, _("write failed: %s"), path); |
19922f22 | 521 | change_file_status(path, i); |
63cccae4 KZ |
522 | } |
523 | } | |
524 | ||
525 | static void do_symlink(char *path, struct cramfs_inode *i) | |
526 | { | |
527 | unsigned long offset = i->offset << 2; | |
528 | unsigned long curr = offset + 4; | |
6ffd9b03 SK |
529 | unsigned long next = |
530 | u32_toggle_endianness(cramfs_is_big_endian, | |
531 | *(uint32_t *) romfs_read(offset)); | |
63cccae4 KZ |
532 | unsigned long size; |
533 | ||
6ffd9b03 | 534 | if (offset == 0) |
70b604b8 | 535 | errx(FSCK_EX_UNCORRECTED, _("symbolic link has zero offset")); |
6ffd9b03 | 536 | if (i->size == 0) |
70b604b8 | 537 | errx(FSCK_EX_UNCORRECTED, _("symbolic link has zero size")); |
19922f22 | 538 | |
6ffd9b03 | 539 | if (offset < start_data) |
19922f22 | 540 | start_data = offset; |
6ffd9b03 | 541 | if (next > end_data) |
63cccae4 | 542 | end_data = next; |
63cccae4 KZ |
543 | |
544 | size = uncompress_block(romfs_read(curr), next - curr); | |
6ffd9b03 | 545 | if (size != i->size) |
70b604b8 | 546 | errx(FSCK_EX_UNCORRECTED, _("size error in symlink: %s"), path); |
63cccae4 KZ |
547 | outbuffer[size] = 0; |
548 | if (opt_verbose) { | |
549 | char *str; | |
550 | ||
6f312c89 | 551 | xasprintf(&str, "%s -> %s", path, outbuffer); |
63cccae4 | 552 | print_node('l', i, str); |
6ffd9b03 | 553 | if (opt_verbose > 1) |
e3ca1312 | 554 | printf(_(" uncompressing block at %lu to %lu (%lu)\n"), |
6ffd9b03 | 555 | curr, next, next - curr); |
19922f22 | 556 | free(str); |
63cccae4 | 557 | } |
2d317f11 | 558 | if (*extract_dir != '\0') { |
6ffd9b03 | 559 | if (symlink(outbuffer, path) < 0) |
70b604b8 | 560 | err(FSCK_EX_ERROR, _("symlink failed: %s"), path); |
63cccae4 KZ |
561 | change_file_status(path, i); |
562 | } | |
563 | } | |
564 | ||
565 | static void do_special_inode(char *path, struct cramfs_inode *i) | |
566 | { | |
567 | dev_t devtype = 0; | |
568 | char type; | |
569 | ||
6ffd9b03 SK |
570 | if (i->offset) |
571 | /* no need to shift offset */ | |
70b604b8 | 572 | errx(FSCK_EX_UNCORRECTED, |
6ffd9b03 SK |
573 | _("special file has non-zero offset: %s"), path); |
574 | ||
63cccae4 KZ |
575 | if (S_ISCHR(i->mode)) { |
576 | devtype = i->size; | |
577 | type = 'c'; | |
6ffd9b03 | 578 | } else if (S_ISBLK(i->mode)) { |
63cccae4 KZ |
579 | devtype = i->size; |
580 | type = 'b'; | |
6ffd9b03 SK |
581 | } else if (S_ISFIFO(i->mode)) { |
582 | if (i->size != 0) | |
70b604b8 | 583 | errx(FSCK_EX_UNCORRECTED, _("fifo has non-zero size: %s"), |
6ffd9b03 | 584 | path); |
63cccae4 | 585 | type = 'p'; |
6ffd9b03 SK |
586 | } else if (S_ISSOCK(i->mode)) { |
587 | if (i->size != 0) | |
70b604b8 | 588 | errx(FSCK_EX_UNCORRECTED, |
6ffd9b03 | 589 | _("socket has non-zero size: %s"), path); |
63cccae4 | 590 | type = 's'; |
6ffd9b03 | 591 | } else { |
70b604b8 | 592 | errx(FSCK_EX_UNCORRECTED, _("bogus mode: %s (%o)"), path, i->mode); |
19922f22 | 593 | return; /* not reached */ |
63cccae4 KZ |
594 | } |
595 | ||
6ffd9b03 | 596 | if (opt_verbose) |
63cccae4 | 597 | print_node(type, i, path); |
63cccae4 | 598 | |
2d317f11 | 599 | if (*extract_dir != '\0') { |
6ffd9b03 | 600 | if (mknod(path, i->mode, devtype) < 0) |
70b604b8 | 601 | err(FSCK_EX_ERROR, _("mknod failed: %s"), path); |
63cccae4 KZ |
602 | change_file_status(path, i); |
603 | } | |
604 | } | |
605 | ||
19922f22 | 606 | static void expand_fs(char *path, struct cramfs_inode *inode) |
63cccae4 | 607 | { |
6ffd9b03 | 608 | if (S_ISDIR(inode->mode)) |
19922f22 | 609 | do_directory(path, inode); |
6ffd9b03 | 610 | else if (S_ISREG(inode->mode)) |
19922f22 | 611 | do_file(path, inode); |
6ffd9b03 | 612 | else if (S_ISLNK(inode->mode)) |
19922f22 | 613 | do_symlink(path, inode); |
6ffd9b03 | 614 | else |
19922f22 | 615 | do_special_inode(path, inode); |
63cccae4 KZ |
616 | } |
617 | ||
19922f22 | 618 | static void test_fs(int start) |
63cccae4 | 619 | { |
19922f22 | 620 | struct cramfs_inode *root; |
63cccae4 | 621 | |
19922f22 KZ |
622 | root = read_super(); |
623 | umask(0); | |
624 | euid = geteuid(); | |
625 | stream.next_in = NULL; | |
626 | stream.avail_in = 0; | |
627 | inflateInit(&stream); | |
628 | expand_fs(extract_dir, root); | |
629 | inflateEnd(&stream); | |
630 | if (start_data != ~0UL) { | |
6ffd9b03 | 631 | if (start_data < (sizeof(struct cramfs_super) + start)) |
70b604b8 | 632 | errx(FSCK_EX_UNCORRECTED, |
60cb2c37 | 633 | _("directory data start (%lu) < sizeof(struct cramfs_super) + start (%zu)"), |
6ffd9b03 SK |
634 | start_data, sizeof(struct cramfs_super) + start); |
635 | if (end_dir != start_data) | |
70b604b8 | 636 | errx(FSCK_EX_UNCORRECTED, |
60cb2c37 | 637 | _("directory data end (%lu) != file data start (%lu)"), |
6ffd9b03 SK |
638 | end_dir, start_data); |
639 | } | |
74ce680a SK |
640 | if (super.flags & CRAMFS_FLAG_FSID_VERSION_2 && end_data > super.size) |
641 | errx(FSCK_EX_UNCORRECTED, _("invalid file data offset")); | |
6ffd9b03 | 642 | |
19922f22 | 643 | iput(root); /* free(root) */ |
63cccae4 | 644 | } |
63cccae4 KZ |
645 | |
646 | int main(int argc, char **argv) | |
647 | { | |
63cccae4 KZ |
648 | int c; /* for getopt */ |
649 | int start = 0; | |
293889d0 | 650 | size_t length = 0; |
19922f22 | 651 | |
922ec175 | 652 | static const struct option longopts[] = { |
87918040 SK |
653 | {"verbose", no_argument, NULL, 'v'}, |
654 | {"version", no_argument, NULL, 'V'}, | |
655 | {"help", no_argument, NULL, 'h'}, | |
656 | {"blocksize", required_argument, NULL, 'b'}, | |
657 | {"extract", optional_argument, NULL, 'x'}, | |
658 | {NULL, 0, NULL, 0}, | |
922ec175 SK |
659 | }; |
660 | ||
e56644ca | 661 | setlocale(LC_MESSAGES, ""); |
5d4ece6e | 662 | setlocale(LC_CTYPE, ""); |
e56644ca PR |
663 | bindtextdomain(PACKAGE, LOCALEDIR); |
664 | textdomain(PACKAGE); | |
2c308875 | 665 | close_stdout_atexit(); |
e56644ca | 666 | |
0b2b32e8 RM |
667 | strutils_set_exitcode(FSCK_EX_USAGE); |
668 | ||
63cccae4 | 669 | /* command line options */ |
2d317f11 | 670 | while ((c = getopt_long(argc, argv, "ayvVhb:", longopts, NULL)) != EOF) |
63cccae4 | 671 | switch (c) { |
6bf463c5 KZ |
672 | case 'a': /* ignore */ |
673 | case 'y': | |
674 | break; | |
63cccae4 | 675 | case 'h': |
5118d1be | 676 | usage(); |
e4a36b8b | 677 | break; |
922ec175 | 678 | case 'V': |
2c308875 | 679 | print_version(FSCK_EX_OK); |
63cccae4 | 680 | case 'x': |
63cccae4 | 681 | opt_extract = 1; |
2d317f11 RM |
682 | if(optarg) |
683 | extract_dir = optarg; | |
63cccae4 | 684 | break; |
63cccae4 KZ |
685 | case 'v': |
686 | opt_verbose++; | |
687 | break; | |
5cd50ebc | 688 | case 'b': |
5cd50ebc | 689 | blksize = strtou32_or_err(optarg, _("invalid blocksize argument")); |
5cd50ebc | 690 | break; |
de173766 | 691 | default: |
677ec86c | 692 | errtryhelp(FSCK_EX_USAGE); |
63cccae4 | 693 | } |
63cccae4 | 694 | |
5118d1be RM |
695 | if ((argc - optind) != 1){ |
696 | warnx(_("bad usage")); | |
697 | errtryhelp(FSCK_EX_USAGE); | |
698 | } | |
63cccae4 KZ |
699 | filename = argv[optind]; |
700 | ||
19922f22 KZ |
701 | test_super(&start, &length); |
702 | test_crc(start); | |
34731f89 | 703 | |
2d317f11 RM |
704 | if(opt_extract) { |
705 | if (blksize == 0) | |
706 | blksize = getpagesize(); | |
707 | outbuffer = xmalloc(blksize * 2); | |
708 | test_fs(start); | |
709 | } | |
63cccae4 | 710 | |
6ffd9b03 | 711 | if (opt_verbose) |
6de1396e | 712 | printf(_("%s: OK\n"), filename); |
63cccae4 | 713 | |
70b604b8 | 714 | exit(FSCK_EX_OK); |
63cccae4 | 715 | } |