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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> | |
47 | #include <zlib.h> | |
48 | ||
49 | #include <sys/types.h> | |
50 | #include <sys/stat.h> | |
51 | #include <sys/mman.h> | |
63cccae4 KZ |
52 | #include <sys/sysmacros.h> /* for major, minor */ |
53 | ||
54 | #include "cramfs.h" | |
63cccae4 | 55 | #include "nls.h" |
098fa6b1 | 56 | #include "blkdev.h" |
11b7698c | 57 | #include "c.h" |
5d6fb944 | 58 | #include "exitcodes.h" |
5cd50ebc | 59 | #include "strutils.h" |
45ca68ec | 60 | #include "closestream.h" |
63cccae4 | 61 | |
70b604b8 | 62 | #define XALLOC_EXIT_CODE FSCK_EX_ERROR |
fc8dc410 SK |
63 | #include "xalloc.h" |
64 | ||
63cccae4 KZ |
65 | static int fd; /* ROM image file descriptor */ |
66 | static char *filename; /* ROM image filename */ | |
19922f22 | 67 | struct cramfs_super super; /* just find the cramfs superblock once */ |
fbaec83b | 68 | static int cramfs_is_big_endian = 0; /* source is big endian */ |
63cccae4 | 69 | static int opt_verbose = 0; /* 1 = verbose (-v), 2+ = very verbose (-vv) */ |
34731f89 RM |
70 | static int opt_extract = 0; /* extract cramfs (-x) */ |
71 | char *extract_dir = ""; /* optional extraction directory (-x) */ | |
63cccae4 | 72 | |
63cccae4 | 73 | #define PAD_SIZE 512 |
b22550fa | 74 | |
6ffd9b03 | 75 | static uid_t euid; /* effective UID */ |
19922f22 KZ |
76 | |
77 | /* (cramfs_super + start) <= start_dir < end_dir <= start_data <= end_data */ | |
6ffd9b03 SK |
78 | static unsigned long start_dir = ~0UL; /* start of first non-root inode */ |
79 | static unsigned long end_dir = 0; /* end of the directory structure */ | |
80 | static unsigned long start_data = ~0UL; /* start of the data (256 MB = max) */ | |
81 | static unsigned long end_data = 0; /* end of the data */ | |
19922f22 | 82 | |
63cccae4 KZ |
83 | |
84 | /* Guarantee access to at least 8kB at a time */ | |
85 | #define ROMBUFFER_BITS 13 | |
86 | #define ROMBUFFERSIZE (1 << ROMBUFFER_BITS) | |
6ffd9b03 | 87 | #define ROMBUFFERMASK (ROMBUFFERSIZE - 1) |
63cccae4 KZ |
88 | static char read_buffer[ROMBUFFERSIZE * 2]; |
89 | static unsigned long read_buffer_block = ~0UL; | |
90 | ||
19922f22 | 91 | static z_stream stream; |
63cccae4 | 92 | |
19922f22 KZ |
93 | /* Prototypes */ |
94 | static void expand_fs(char *, struct cramfs_inode *); | |
63cccae4 | 95 | |
19922f22 KZ |
96 | static char *outbuffer; |
97 | ||
5cd50ebc | 98 | static size_t blksize = 0; |
19922f22 | 99 | |
b7a75206 | 100 | |
63cccae4 | 101 | /* Input status of 0 to print help and exit without an error. */ |
e4a36b8b | 102 | static void __attribute__((__noreturn__)) usage(int status) |
63cccae4 KZ |
103 | { |
104 | FILE *stream = status ? stderr : stdout; | |
105 | ||
922ec175 SK |
106 | fputs(USAGE_HEADER, stream); |
107 | fprintf(stream, | |
09af3db4 | 108 | _(" %s [options] <file>\n"), program_invocation_short_name); |
922ec175 | 109 | fputs(USAGE_OPTIONS, stream); |
6bf463c5 | 110 | fputs(_(" -a for compatibility only, ignored\n"), stream); |
922ec175 | 111 | fputs(_(" -v, --verbose be more verbose\n"), stream); |
6bf463c5 | 112 | fputs(_(" -y for compatibility only, ignored\n"), stream); |
deedae5f KZ |
113 | fputs(_(" -b, --blocksize <size> use this blocksize, defaults to page size\n"), stream); |
114 | fputs(_(" --extract[=<dir>] test uncompression, optionally extract into <dir>\n"), stream); | |
6bf463c5 | 115 | fputs(USAGE_SEPARATOR, stream); |
922ec175 SK |
116 | fputs(USAGE_HELP, stream); |
117 | fputs(USAGE_VERSION, stream); | |
6bf463c5 | 118 | fputs(USAGE_SEPARATOR, stream); |
63cccae4 KZ |
119 | exit(status); |
120 | } | |
121 | ||
d63eb75e | 122 | static int get_superblock_endianness(uint32_t magic) |
fbaec83b SRP |
123 | { |
124 | if (magic == CRAMFS_MAGIC) { | |
125 | cramfs_is_big_endian = HOST_IS_BIG_ENDIAN; | |
126 | return 0; | |
6ffd9b03 SK |
127 | } else if (magic == |
128 | u32_toggle_endianness(!HOST_IS_BIG_ENDIAN, CRAMFS_MAGIC)) { | |
fbaec83b SRP |
129 | cramfs_is_big_endian = !HOST_IS_BIG_ENDIAN; |
130 | return 0; | |
6ffd9b03 | 131 | } else |
fbaec83b | 132 | return -1; |
fbaec83b SRP |
133 | } |
134 | ||
6ffd9b03 SK |
135 | static void test_super(int *start, size_t * length) |
136 | { | |
19922f22 KZ |
137 | struct stat st; |
138 | ||
139 | /* find the physical size of the file or block device */ | |
6ffd9b03 | 140 | if (stat(filename, &st) < 0) |
add1b8af | 141 | err(FSCK_EX_ERROR, _("stat failed %s"), filename); |
6ffd9b03 | 142 | |
19922f22 | 143 | fd = open(filename, O_RDONLY); |
6ffd9b03 | 144 | if (fd < 0) |
289dcc90 | 145 | err(FSCK_EX_ERROR, _("cannot open %s"), filename); |
6ffd9b03 | 146 | |
19922f22 | 147 | if (S_ISBLK(st.st_mode)) { |
098fa6b1 | 148 | unsigned long long bytes; |
6ffd9b03 | 149 | if (blkdev_get_size(fd, &bytes)) |
70b604b8 | 150 | err(FSCK_EX_ERROR, |
6ffd9b03 SK |
151 | _("ioctl failed: unable to determine device size: %s"), |
152 | filename); | |
098fa6b1 | 153 | *length = bytes; |
6ffd9b03 | 154 | } else if (S_ISREG(st.st_mode)) |
19922f22 | 155 | *length = st.st_size; |
6ffd9b03 | 156 | else |
70b604b8 | 157 | errx(FSCK_EX_ERROR, _("not a block device or file: %s"), filename); |
19922f22 | 158 | |
6ffd9b03 | 159 | if (*length < sizeof(struct cramfs_super)) |
70b604b8 | 160 | errx(FSCK_EX_UNCORRECTED, _("file length too short")); |
19922f22 KZ |
161 | |
162 | /* find superblock */ | |
6ffd9b03 | 163 | if (read(fd, &super, sizeof(super)) != sizeof(super)) |
47481cbd | 164 | err(FSCK_EX_ERROR, _("cannot read %s"), filename); |
6ffd9b03 | 165 | if (get_superblock_endianness(super.magic) != -1) |
19922f22 | 166 | *start = 0; |
19922f22 | 167 | else if (*length >= (PAD_SIZE + sizeof(super))) { |
b3f30f50 | 168 | if (lseek(fd, PAD_SIZE, SEEK_SET) == (off_t) -1) |
47481cbd | 169 | err(FSCK_EX_ERROR, _("seek on %s failed"), filename); |
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 = PAD_SIZE; |
6ffd9b03 | 174 | else |
70b604b8 | 175 | errx(FSCK_EX_UNCORRECTED, _("superblock magic not found")); |
6ffd9b03 | 176 | } else |
70b604b8 | 177 | errx(FSCK_EX_UNCORRECTED, _("superblock magic not found")); |
fbaec83b | 178 | |
6ffd9b03 | 179 | if (opt_verbose) |
6de1396e SK |
180 | printf(_("cramfs endianness is %s\n"), |
181 | cramfs_is_big_endian ? _("big") : _("little")); | |
fbaec83b SRP |
182 | |
183 | super_toggle_endianness(cramfs_is_big_endian, &super); | |
6ffd9b03 | 184 | if (super.flags & ~CRAMFS_SUPPORTED_FLAGS) |
70b604b8 | 185 | errx(FSCK_EX_ERROR, _("unsupported filesystem features")); |
6ffd9b03 | 186 | |
f991dbd3 RM |
187 | /* What are valid superblock sizes? */ |
188 | if (super.size < sizeof(struct cramfs_super)) | |
70b604b8 | 189 | errx(FSCK_EX_UNCORRECTED, _("superblock size (%d) too small"), |
6ffd9b03 SK |
190 | super.size); |
191 | ||
19922f22 | 192 | if (super.flags & CRAMFS_FLAG_FSID_VERSION_2) { |
6ffd9b03 | 193 | if (super.fsid.files == 0) |
70b604b8 | 194 | errx(FSCK_EX_UNCORRECTED, _("zero file count")); |
6ffd9b03 | 195 | if (*length < super.size) |
70b604b8 | 196 | errx(FSCK_EX_UNCORRECTED, _("file length too short")); |
6ffd9b03 | 197 | else if (*length > super.size) |
deedae5f | 198 | warnx(_("file extends past end of filesystem")); |
6ffd9b03 | 199 | } else |
deedae5f | 200 | warnx(_("old cramfs format")); |
19922f22 KZ |
201 | } |
202 | ||
203 | static void test_crc(int start) | |
204 | { | |
205 | void *buf; | |
d51f37a3 | 206 | uint32_t crc; |
19922f22 KZ |
207 | |
208 | if (!(super.flags & CRAMFS_FLAG_FSID_VERSION_2)) { | |
deedae5f | 209 | warnx(_("unable to test CRC: old cramfs format")); |
19922f22 | 210 | return; |
19922f22 KZ |
211 | } |
212 | ||
213 | crc = crc32(0L, Z_NULL, 0); | |
214 | ||
6ffd9b03 SK |
215 | buf = |
216 | mmap(NULL, super.size, PROT_READ | PROT_WRITE, MAP_PRIVATE, fd, 0); | |
19922f22 | 217 | if (buf == MAP_FAILED) { |
6ffd9b03 SK |
218 | buf = |
219 | mmap(NULL, super.size, PROT_READ | PROT_WRITE, | |
220 | MAP_PRIVATE | MAP_ANONYMOUS, -1, 0); | |
19922f22 | 221 | if (buf != MAP_FAILED) { |
b3f30f50 | 222 | if (lseek(fd, 0, SEEK_SET) == (off_t) -1) |
47481cbd | 223 | err(FSCK_EX_ERROR, _("seek on %s failed"), filename); |
5f841647 | 224 | if (read(fd, buf, super.size) < 0) |
47481cbd | 225 | err(FSCK_EX_ERROR, _("cannot read %s"), filename); |
19922f22 KZ |
226 | } |
227 | } | |
228 | if (buf != MAP_FAILED) { | |
aa719998 | 229 | ((struct cramfs_super *)((unsigned char *) buf + start))->fsid.crc = |
6ffd9b03 | 230 | crc32(0L, Z_NULL, 0); |
aa719998 | 231 | crc = crc32(crc, (unsigned char *) buf + start, super.size - start); |
19922f22 | 232 | munmap(buf, super.size); |
6ffd9b03 | 233 | } else { |
19922f22 KZ |
234 | int retval; |
235 | size_t length = 0; | |
236 | ||
fc8dc410 | 237 | buf = xmalloc(4096); |
b3f30f50 | 238 | if (lseek(fd, start, SEEK_SET) == (off_t) -1) |
47481cbd | 239 | err(FSCK_EX_ERROR, _("seek on %s failed"), filename); |
19922f22 KZ |
240 | for (;;) { |
241 | retval = read(fd, buf, 4096); | |
6ffd9b03 | 242 | if (retval < 0) |
47481cbd | 243 | err(FSCK_EX_ERROR, _("cannot read %s"), filename); |
6ffd9b03 | 244 | else if (retval == 0) |
19922f22 | 245 | break; |
6ffd9b03 SK |
246 | if (length == 0) |
247 | ((struct cramfs_super *)buf)->fsid.crc = | |
248 | crc32(0L, Z_NULL, 0); | |
19922f22 | 249 | length += retval; |
6ffd9b03 SK |
250 | if (length > (super.size - start)) { |
251 | crc = crc32(crc, buf, | |
252 | retval - (length - | |
253 | (super.size - start))); | |
19922f22 KZ |
254 | break; |
255 | } | |
256 | crc = crc32(crc, buf, retval); | |
257 | } | |
258 | free(buf); | |
259 | } | |
260 | ||
6ffd9b03 | 261 | if (crc != super.fsid.crc) |
70b604b8 | 262 | errx(FSCK_EX_UNCORRECTED, _("crc error")); |
19922f22 KZ |
263 | } |
264 | ||
63cccae4 KZ |
265 | static void print_node(char type, struct cramfs_inode *i, char *name) |
266 | { | |
267 | char info[10]; | |
268 | ||
6ffd9b03 | 269 | if (S_ISCHR(i->mode) || (S_ISBLK(i->mode))) |
63cccae4 KZ |
270 | /* major/minor numbers can be as high as 2^12 or 4096 */ |
271 | snprintf(info, 10, "%4d,%4d", major(i->size), minor(i->size)); | |
6ffd9b03 | 272 | else |
63cccae4 KZ |
273 | /* size be as high as 2^24 or 16777216 */ |
274 | snprintf(info, 10, "%9d", i->size); | |
63cccae4 KZ |
275 | |
276 | printf("%c %04o %s %5d:%-3d %s\n", | |
a6f72ab4 KZ |
277 | type, i->mode & ~S_IFMT, info, i->uid, i->gid, |
278 | !*name && type == 'd' ? "/" : name); | |
63cccae4 KZ |
279 | } |
280 | ||
281 | /* | |
282 | * Create a fake "blocked" access | |
283 | */ | |
284 | static void *romfs_read(unsigned long offset) | |
285 | { | |
286 | unsigned int block = offset >> ROMBUFFER_BITS; | |
287 | if (block != read_buffer_block) { | |
52848780 KZ |
288 | ssize_t x; |
289 | ||
63cccae4 | 290 | read_buffer_block = block; |
b3f30f50 KZ |
291 | if (lseek(fd, block << ROMBUFFER_BITS, SEEK_SET) == (off_t) -1) |
292 | warn(_("seek failed")); | |
52848780 KZ |
293 | |
294 | x = read(fd, read_buffer, ROMBUFFERSIZE * 2); | |
295 | if (x < 0) | |
296 | warn(_("read romfs failed")); | |
63cccae4 KZ |
297 | } |
298 | return read_buffer + (offset & ROMBUFFERMASK); | |
299 | } | |
300 | ||
6ffd9b03 | 301 | static struct cramfs_inode *cramfs_iget(struct cramfs_inode *i) |
63cccae4 | 302 | { |
fc8dc410 | 303 | struct cramfs_inode *inode = xmalloc(sizeof(struct cramfs_inode)); |
19922f22 | 304 | |
fbaec83b | 305 | inode_to_host(cramfs_is_big_endian, i, inode); |
63cccae4 KZ |
306 | return inode; |
307 | } | |
308 | ||
309 | static struct cramfs_inode *iget(unsigned int ino) | |
310 | { | |
311 | return cramfs_iget(romfs_read(ino)); | |
312 | } | |
313 | ||
63cccae4 KZ |
314 | static void iput(struct cramfs_inode *inode) |
315 | { | |
316 | free(inode); | |
317 | } | |
63cccae4 KZ |
318 | |
319 | /* | |
19922f22 | 320 | * Return the offset of the root directory |
63cccae4 KZ |
321 | */ |
322 | static struct cramfs_inode *read_super(void) | |
323 | { | |
6ffd9b03 | 324 | struct cramfs_inode *root = cramfs_iget(&super.root); |
fbaec83b | 325 | unsigned long offset = root->offset << 2; |
19922f22 | 326 | |
fbaec83b | 327 | if (!S_ISDIR(root->mode)) |
70b604b8 | 328 | errx(FSCK_EX_UNCORRECTED, _("root inode is not directory")); |
19922f22 KZ |
329 | if (!(super.flags & CRAMFS_FLAG_SHIFTED_ROOT_OFFSET) && |
330 | ((offset != sizeof(struct cramfs_super)) && | |
6ffd9b03 | 331 | (offset != PAD_SIZE + sizeof(struct cramfs_super)))) { |
70b604b8 | 332 | errx(FSCK_EX_UNCORRECTED, _("bad root offset (%lu)"), offset); |
19922f22 | 333 | } |
fbaec83b | 334 | return root; |
63cccae4 KZ |
335 | } |
336 | ||
52848780 | 337 | static int uncompress_block(void *src, size_t len) |
63cccae4 KZ |
338 | { |
339 | int err; | |
340 | ||
341 | stream.next_in = src; | |
342 | stream.avail_in = len; | |
343 | ||
6ffd9b03 | 344 | stream.next_out = (unsigned char *)outbuffer; |
38141baf | 345 | stream.avail_out = blksize * 2; |
63cccae4 KZ |
346 | |
347 | inflateReset(&stream); | |
348 | ||
38141baf | 349 | if (len > blksize * 2) |
70b604b8 | 350 | errx(FSCK_EX_UNCORRECTED, _("data block too large")); |
6ffd9b03 | 351 | |
63cccae4 | 352 | err = inflate(&stream, Z_FINISH); |
6ffd9b03 | 353 | if (err != Z_STREAM_END) |
52848780 KZ |
354 | errx(FSCK_EX_UNCORRECTED, _("decompression error: %s"), |
355 | zError(err)); | |
63cccae4 KZ |
356 | return stream.total_out; |
357 | } | |
358 | ||
48d7b13a KZ |
359 | #if !HAVE_LCHOWN |
360 | #define lchown chown | |
63cccae4 | 361 | #endif |
6ffd9b03 SK |
362 | |
363 | static void do_uncompress(char *path, int fd, unsigned long offset, | |
364 | unsigned long size) | |
19922f22 | 365 | { |
38141baf | 366 | unsigned long curr = offset + 4 * ((size + blksize - 1) / blksize); |
19922f22 KZ |
367 | |
368 | do { | |
38141baf | 369 | unsigned long out = blksize; |
6ffd9b03 SK |
370 | unsigned long next = u32_toggle_endianness(cramfs_is_big_endian, |
371 | *(uint32_t *) | |
372 | romfs_read(offset)); | |
19922f22 | 373 | |
6ffd9b03 | 374 | if (next > end_data) |
19922f22 | 375 | end_data = next; |
19922f22 KZ |
376 | |
377 | offset += 4; | |
378 | if (curr == next) { | |
6ffd9b03 SK |
379 | if (opt_verbose > 1) |
380 | printf(_(" hole at %ld (%zd)\n"), curr, | |
38141baf RM |
381 | blksize); |
382 | if (size < blksize) | |
19922f22 KZ |
383 | out = size; |
384 | memset(outbuffer, 0x00, out); | |
6ffd9b03 SK |
385 | } else { |
386 | if (opt_verbose > 1) | |
387 | printf(_(" uncompressing block at %ld to %ld (%ld)\n"), | |
388 | curr, next, next - curr); | |
19922f22 KZ |
389 | out = uncompress_block(romfs_read(curr), next - curr); |
390 | } | |
38141baf RM |
391 | if (size >= blksize) { |
392 | if (out != blksize) | |
70b604b8 | 393 | errx(FSCK_EX_UNCORRECTED, |
6ffd9b03 | 394 | _("non-block (%ld) bytes"), out); |
19922f22 | 395 | } else { |
6ffd9b03 | 396 | if (out != size) |
70b604b8 | 397 | errx(FSCK_EX_UNCORRECTED, |
6ffd9b03 SK |
398 | _("non-size (%ld vs %ld) bytes"), out, |
399 | size); | |
19922f22 KZ |
400 | } |
401 | size -= out; | |
2d317f11 | 402 | if (*extract_dir != '\0') |
6ffd9b03 | 403 | if (write(fd, outbuffer, out) < 0) |
70b604b8 | 404 | err(FSCK_EX_ERROR, _("write failed: %s"), |
6ffd9b03 | 405 | path); |
19922f22 KZ |
406 | curr = next; |
407 | } while (size); | |
408 | } | |
63cccae4 KZ |
409 | |
410 | static void change_file_status(char *path, struct cramfs_inode *i) | |
411 | { | |
412 | struct utimbuf epoch = { 0, 0 }; | |
413 | ||
414 | if (euid == 0) { | |
6ffd9b03 | 415 | if (lchown(path, i->uid, i->gid) < 0) |
70b604b8 | 416 | err(FSCK_EX_ERROR, _("lchown failed: %s"), path); |
63cccae4 KZ |
417 | if (S_ISLNK(i->mode)) |
418 | return; | |
6ffd9b03 | 419 | if (((S_ISUID | S_ISGID) & i->mode) && chmod(path, i->mode) < 0) |
70b604b8 | 420 | err(FSCK_EX_ERROR, _("chown failed: %s"), path); |
63cccae4 KZ |
421 | } |
422 | if (S_ISLNK(i->mode)) | |
423 | return; | |
6ffd9b03 | 424 | if (utime(path, &epoch) < 0) |
70b604b8 | 425 | err(FSCK_EX_ERROR, _("utime failed: %s"), path); |
19922f22 KZ |
426 | } |
427 | ||
428 | static void do_directory(char *path, struct cramfs_inode *i) | |
429 | { | |
430 | int pathlen = strlen(path); | |
431 | int count = i->size; | |
432 | unsigned long offset = i->offset << 2; | |
fc8dc410 | 433 | char *newpath = xmalloc(pathlen + 256); |
19922f22 | 434 | |
6ffd9b03 | 435 | if (offset == 0 && count != 0) |
70b604b8 | 436 | errx(FSCK_EX_UNCORRECTED, |
6ffd9b03 SK |
437 | _("directory inode has zero offset and non-zero size: %s"), |
438 | path); | |
439 | ||
440 | if (offset != 0 && offset < start_dir) | |
19922f22 | 441 | start_dir = offset; |
6ffd9b03 | 442 | |
19922f22 KZ |
443 | /* TODO: Do we need to check end_dir for empty case? */ |
444 | memcpy(newpath, path, pathlen); | |
445 | newpath[pathlen] = '/'; | |
446 | pathlen++; | |
6ffd9b03 | 447 | if (opt_verbose) |
19922f22 | 448 | print_node('d', i, path); |
6ffd9b03 | 449 | |
2d317f11 | 450 | if (*extract_dir != '\0') { |
6ffd9b03 | 451 | if (mkdir(path, i->mode) < 0) |
70b604b8 | 452 | err(FSCK_EX_ERROR, _("mkdir failed: %s"), path); |
19922f22 KZ |
453 | change_file_status(path, i); |
454 | } | |
455 | while (count > 0) { | |
456 | struct cramfs_inode *child = iget(offset); | |
457 | int size; | |
458 | int newlen = child->namelen << 2; | |
459 | ||
460 | size = sizeof(struct cramfs_inode) + newlen; | |
461 | count -= size; | |
462 | ||
463 | offset += sizeof(struct cramfs_inode); | |
464 | ||
465 | memcpy(newpath + pathlen, romfs_read(offset), newlen); | |
466 | newpath[pathlen + newlen] = 0; | |
6ffd9b03 | 467 | if (newlen == 0) |
70b604b8 | 468 | errx(FSCK_EX_UNCORRECTED, _("filename length is zero")); |
6ffd9b03 | 469 | if ((pathlen + newlen) - strlen(newpath) > 3) |
70b604b8 | 470 | errx(FSCK_EX_UNCORRECTED, _("bad filename length")); |
19922f22 KZ |
471 | expand_fs(newpath, child); |
472 | ||
473 | offset += newlen; | |
474 | ||
6ffd9b03 | 475 | if (offset <= start_dir) |
70b604b8 | 476 | errx(FSCK_EX_UNCORRECTED, _("bad inode offset")); |
6ffd9b03 | 477 | if (offset > end_dir) |
19922f22 | 478 | end_dir = offset; |
6ffd9b03 | 479 | iput(child); /* free(child) */ |
19922f22 KZ |
480 | } |
481 | free(newpath); | |
482 | } | |
483 | ||
484 | static void do_file(char *path, struct cramfs_inode *i) | |
485 | { | |
486 | unsigned long offset = i->offset << 2; | |
487 | int fd = 0; | |
488 | ||
6ffd9b03 | 489 | if (offset == 0 && i->size != 0) |
70b604b8 | 490 | errx(FSCK_EX_UNCORRECTED, |
6ffd9b03 SK |
491 | _("file inode has zero offset and non-zero size")); |
492 | if (i->size == 0 && offset != 0) | |
70b604b8 | 493 | errx(FSCK_EX_UNCORRECTED, |
6ffd9b03 SK |
494 | _("file inode has zero size and non-zero offset")); |
495 | if (offset != 0 && offset < start_data) | |
19922f22 | 496 | start_data = offset; |
6ffd9b03 | 497 | if (opt_verbose) |
19922f22 | 498 | print_node('f', i, path); |
2d317f11 | 499 | if (*extract_dir != '\0') { |
19922f22 | 500 | fd = open(path, O_WRONLY | O_CREAT | O_TRUNC, i->mode); |
6ffd9b03 | 501 | if (fd < 0) |
289dcc90 | 502 | err(FSCK_EX_ERROR, _("cannot open %s"), path); |
19922f22 | 503 | } |
6ffd9b03 | 504 | if (i->size) |
19922f22 | 505 | do_uncompress(path, fd, offset, i->size); |
2d317f11 | 506 | if ( *extract_dir != '\0') { |
83f210e8 SK |
507 | if (close_fd(fd) != 0) |
508 | err(FSCK_EX_ERROR, _("write failed: %s"), path); | |
19922f22 | 509 | change_file_status(path, i); |
63cccae4 KZ |
510 | } |
511 | } | |
512 | ||
513 | static void do_symlink(char *path, struct cramfs_inode *i) | |
514 | { | |
515 | unsigned long offset = i->offset << 2; | |
516 | unsigned long curr = offset + 4; | |
6ffd9b03 SK |
517 | unsigned long next = |
518 | u32_toggle_endianness(cramfs_is_big_endian, | |
519 | *(uint32_t *) romfs_read(offset)); | |
63cccae4 KZ |
520 | unsigned long size; |
521 | ||
6ffd9b03 | 522 | if (offset == 0) |
70b604b8 | 523 | errx(FSCK_EX_UNCORRECTED, _("symbolic link has zero offset")); |
6ffd9b03 | 524 | if (i->size == 0) |
70b604b8 | 525 | errx(FSCK_EX_UNCORRECTED, _("symbolic link has zero size")); |
19922f22 | 526 | |
6ffd9b03 | 527 | if (offset < start_data) |
19922f22 | 528 | start_data = offset; |
6ffd9b03 | 529 | if (next > end_data) |
63cccae4 | 530 | end_data = next; |
63cccae4 KZ |
531 | |
532 | size = uncompress_block(romfs_read(curr), next - curr); | |
6ffd9b03 | 533 | if (size != i->size) |
70b604b8 | 534 | errx(FSCK_EX_UNCORRECTED, _("size error in symlink: %s"), path); |
63cccae4 KZ |
535 | outbuffer[size] = 0; |
536 | if (opt_verbose) { | |
537 | char *str; | |
538 | ||
6f312c89 | 539 | xasprintf(&str, "%s -> %s", path, outbuffer); |
63cccae4 | 540 | print_node('l', i, str); |
6ffd9b03 SK |
541 | if (opt_verbose > 1) |
542 | printf(_(" uncompressing block at %ld to %ld (%ld)\n"), | |
543 | curr, next, next - curr); | |
19922f22 | 544 | free(str); |
63cccae4 | 545 | } |
2d317f11 | 546 | if (*extract_dir != '\0') { |
6ffd9b03 | 547 | if (symlink(outbuffer, path) < 0) |
70b604b8 | 548 | err(FSCK_EX_ERROR, _("symlink failed: %s"), path); |
63cccae4 KZ |
549 | change_file_status(path, i); |
550 | } | |
551 | } | |
552 | ||
553 | static void do_special_inode(char *path, struct cramfs_inode *i) | |
554 | { | |
555 | dev_t devtype = 0; | |
556 | char type; | |
557 | ||
6ffd9b03 SK |
558 | if (i->offset) |
559 | /* no need to shift offset */ | |
70b604b8 | 560 | errx(FSCK_EX_UNCORRECTED, |
6ffd9b03 SK |
561 | _("special file has non-zero offset: %s"), path); |
562 | ||
63cccae4 KZ |
563 | if (S_ISCHR(i->mode)) { |
564 | devtype = i->size; | |
565 | type = 'c'; | |
6ffd9b03 | 566 | } else if (S_ISBLK(i->mode)) { |
63cccae4 KZ |
567 | devtype = i->size; |
568 | type = 'b'; | |
6ffd9b03 SK |
569 | } else if (S_ISFIFO(i->mode)) { |
570 | if (i->size != 0) | |
70b604b8 | 571 | errx(FSCK_EX_UNCORRECTED, _("fifo has non-zero size: %s"), |
6ffd9b03 | 572 | path); |
63cccae4 | 573 | type = 'p'; |
6ffd9b03 SK |
574 | } else if (S_ISSOCK(i->mode)) { |
575 | if (i->size != 0) | |
70b604b8 | 576 | errx(FSCK_EX_UNCORRECTED, |
6ffd9b03 | 577 | _("socket has non-zero size: %s"), path); |
63cccae4 | 578 | type = 's'; |
6ffd9b03 | 579 | } else { |
70b604b8 | 580 | errx(FSCK_EX_UNCORRECTED, _("bogus mode: %s (%o)"), path, i->mode); |
19922f22 | 581 | return; /* not reached */ |
63cccae4 KZ |
582 | } |
583 | ||
6ffd9b03 | 584 | if (opt_verbose) |
63cccae4 | 585 | print_node(type, i, path); |
63cccae4 | 586 | |
2d317f11 | 587 | if (*extract_dir != '\0') { |
6ffd9b03 | 588 | if (mknod(path, i->mode, devtype) < 0) |
70b604b8 | 589 | err(FSCK_EX_ERROR, _("mknod failed: %s"), path); |
63cccae4 KZ |
590 | change_file_status(path, i); |
591 | } | |
592 | } | |
593 | ||
19922f22 | 594 | static void expand_fs(char *path, struct cramfs_inode *inode) |
63cccae4 | 595 | { |
6ffd9b03 | 596 | if (S_ISDIR(inode->mode)) |
19922f22 | 597 | do_directory(path, inode); |
6ffd9b03 | 598 | else if (S_ISREG(inode->mode)) |
19922f22 | 599 | do_file(path, inode); |
6ffd9b03 | 600 | else if (S_ISLNK(inode->mode)) |
19922f22 | 601 | do_symlink(path, inode); |
6ffd9b03 | 602 | else |
19922f22 | 603 | do_special_inode(path, inode); |
63cccae4 KZ |
604 | } |
605 | ||
19922f22 | 606 | static void test_fs(int start) |
63cccae4 | 607 | { |
19922f22 | 608 | struct cramfs_inode *root; |
63cccae4 | 609 | |
19922f22 KZ |
610 | root = read_super(); |
611 | umask(0); | |
612 | euid = geteuid(); | |
613 | stream.next_in = NULL; | |
614 | stream.avail_in = 0; | |
615 | inflateInit(&stream); | |
616 | expand_fs(extract_dir, root); | |
617 | inflateEnd(&stream); | |
618 | if (start_data != ~0UL) { | |
6ffd9b03 | 619 | if (start_data < (sizeof(struct cramfs_super) + start)) |
70b604b8 | 620 | errx(FSCK_EX_UNCORRECTED, |
60cb2c37 | 621 | _("directory data start (%lu) < sizeof(struct cramfs_super) + start (%zu)"), |
6ffd9b03 SK |
622 | start_data, sizeof(struct cramfs_super) + start); |
623 | if (end_dir != start_data) | |
70b604b8 | 624 | errx(FSCK_EX_UNCORRECTED, |
60cb2c37 | 625 | _("directory data end (%lu) != file data start (%lu)"), |
6ffd9b03 SK |
626 | end_dir, start_data); |
627 | } | |
628 | if (super.flags & CRAMFS_FLAG_FSID_VERSION_2) | |
629 | if (end_data > super.size) | |
70b604b8 | 630 | errx(FSCK_EX_UNCORRECTED, _("invalid file data offset")); |
6ffd9b03 | 631 | |
19922f22 | 632 | iput(root); /* free(root) */ |
63cccae4 | 633 | } |
63cccae4 KZ |
634 | |
635 | int main(int argc, char **argv) | |
636 | { | |
63cccae4 KZ |
637 | int c; /* for getopt */ |
638 | int start = 0; | |
293889d0 | 639 | size_t length = 0; |
19922f22 | 640 | |
922ec175 | 641 | static const struct option longopts[] = { |
922ec175 SK |
642 | {"verbose", no_argument, 0, 'v'}, |
643 | {"version", no_argument, 0, 'V'}, | |
644 | {"help", no_argument, 0, 'h'}, | |
5cd50ebc | 645 | {"blocksize", required_argument, 0, 'b'}, |
2d317f11 | 646 | {"extract", optional_argument, 0, 'x'}, |
922ec175 SK |
647 | {NULL, no_argument, 0, '0'}, |
648 | }; | |
649 | ||
e56644ca | 650 | setlocale(LC_MESSAGES, ""); |
5d4ece6e | 651 | setlocale(LC_CTYPE, ""); |
e56644ca PR |
652 | bindtextdomain(PACKAGE, LOCALEDIR); |
653 | textdomain(PACKAGE); | |
45ca68ec | 654 | atexit(close_stdout); |
e56644ca | 655 | |
63cccae4 | 656 | /* command line options */ |
2d317f11 | 657 | while ((c = getopt_long(argc, argv, "ayvVhb:", longopts, NULL)) != EOF) |
63cccae4 | 658 | switch (c) { |
6bf463c5 KZ |
659 | case 'a': /* ignore */ |
660 | case 'y': | |
661 | break; | |
63cccae4 | 662 | case 'h': |
70b604b8 | 663 | usage(FSCK_EX_OK); |
e4a36b8b | 664 | break; |
922ec175 SK |
665 | case 'V': |
666 | printf(UTIL_LINUX_VERSION); | |
667 | return EXIT_SUCCESS; | |
63cccae4 | 668 | case 'x': |
63cccae4 | 669 | opt_extract = 1; |
2d317f11 RM |
670 | if(optarg) |
671 | extract_dir = optarg; | |
63cccae4 | 672 | break; |
63cccae4 KZ |
673 | case 'v': |
674 | opt_verbose++; | |
675 | break; | |
5cd50ebc | 676 | case 'b': |
5cd50ebc | 677 | blksize = strtou32_or_err(optarg, _("invalid blocksize argument")); |
5cd50ebc | 678 | break; |
de173766 SK |
679 | default: |
680 | usage(FSCK_EX_USAGE); | |
63cccae4 | 681 | } |
63cccae4 KZ |
682 | |
683 | if ((argc - optind) != 1) | |
70b604b8 | 684 | usage(FSCK_EX_USAGE); |
63cccae4 KZ |
685 | filename = argv[optind]; |
686 | ||
19922f22 KZ |
687 | test_super(&start, &length); |
688 | test_crc(start); | |
34731f89 | 689 | |
2d317f11 RM |
690 | if(opt_extract) { |
691 | if (blksize == 0) | |
692 | blksize = getpagesize(); | |
693 | outbuffer = xmalloc(blksize * 2); | |
694 | test_fs(start); | |
695 | } | |
63cccae4 | 696 | |
6ffd9b03 | 697 | if (opt_verbose) |
6de1396e | 698 | printf(_("%s: OK\n"), filename); |
63cccae4 | 699 | |
70b604b8 | 700 | exit(FSCK_EX_OK); |
63cccae4 | 701 | } |