]>
Commit | Line | Data |
---|---|---|
f3db3566 TT |
1 | /* |
2 | * dump.c --- dump the contents of an inode out to a file | |
efc6f628 | 3 | * |
f3db3566 TT |
4 | * Copyright (C) 1994 Theodore Ts'o. This file may be redistributed |
5 | * under the terms of the GNU Public License. | |
6 | */ | |
7 | ||
cf5301d7 | 8 | #ifndef _GNU_SOURCE |
efac5a7f | 9 | #define _GNU_SOURCE /* for O_LARGEFILE */ |
cf5301d7 | 10 | #endif |
efac5a7f | 11 | |
d1154eb4 | 12 | #include "config.h" |
f3db3566 TT |
13 | #include <stdio.h> |
14 | #include <unistd.h> | |
15 | #include <stdlib.h> | |
16 | #include <ctype.h> | |
17 | #include <string.h> | |
18 | #include <time.h> | |
50e1e10f TT |
19 | #ifdef HAVE_ERRNO_H |
20 | #include <errno.h> | |
21 | #endif | |
f3db3566 TT |
22 | #include <sys/types.h> |
23 | #include <sys/stat.h> | |
24 | #include <fcntl.h> | |
fc6d9d51 TT |
25 | #include <utime.h> |
26 | #ifdef HAVE_GETOPT_H | |
27 | #include <getopt.h> | |
efc6f628 | 28 | #else |
fc6d9d51 TT |
29 | extern int optind; |
30 | extern char *optarg; | |
31 | #endif | |
f3db3566 TT |
32 | |
33 | #include "debugfs.h" | |
34 | ||
819157db TT |
35 | #ifndef O_LARGEFILE |
36 | #define O_LARGEFILE 0 | |
37 | #endif | |
38 | ||
fc6d9d51 TT |
39 | /* |
40 | * The mode_xlate function translates a linux mode into a native-OS mode_t. | |
41 | */ | |
42 | static struct { | |
43 | __u16 lmask; | |
44 | mode_t mask; | |
45 | } mode_table[] = { | |
46 | { LINUX_S_IRUSR, S_IRUSR }, | |
47 | { LINUX_S_IWUSR, S_IWUSR }, | |
48 | { LINUX_S_IXUSR, S_IXUSR }, | |
49 | { LINUX_S_IRGRP, S_IRGRP }, | |
50 | { LINUX_S_IWGRP, S_IWGRP }, | |
51 | { LINUX_S_IXGRP, S_IXGRP }, | |
52 | { LINUX_S_IROTH, S_IROTH }, | |
53 | { LINUX_S_IWOTH, S_IWOTH }, | |
54 | { LINUX_S_IXOTH, S_IXOTH }, | |
55 | { 0, 0 } | |
56 | }; | |
efc6f628 | 57 | |
fc6d9d51 TT |
58 | static mode_t mode_xlate(__u16 lmode) |
59 | { | |
60 | mode_t mode = 0; | |
61 | int i; | |
62 | ||
63 | for (i=0; mode_table[i].lmask; i++) { | |
64 | if (lmode & mode_table[i].lmask) | |
65 | mode |= mode_table[i].mask; | |
66 | } | |
67 | return mode; | |
68 | } | |
69 | ||
2e8d40d5 TT |
70 | static void fix_perms(const char *cmd, const struct ext2_inode *inode, |
71 | int fd, const char *name) | |
72 | { | |
73 | struct utimbuf ut; | |
74 | int i; | |
75 | ||
76 | if (fd != -1) | |
77 | i = fchmod(fd, mode_xlate(inode->i_mode)); | |
78 | else | |
79 | i = chmod(name, mode_xlate(inode->i_mode)); | |
80 | if (i == -1) | |
81 | com_err(cmd, errno, "while setting permissions of %s", name); | |
82 | ||
83 | #ifndef HAVE_FCHOWN | |
c5de1d4a | 84 | i = chown(name, inode->i_uid, inode->i_gid); |
2e8d40d5 TT |
85 | #else |
86 | if (fd != -1) | |
87 | i = fchown(fd, inode->i_uid, inode->i_gid); | |
88 | else | |
89 | i = chown(name, inode->i_uid, inode->i_gid); | |
90 | #endif | |
91 | if (i == -1) | |
92 | com_err(cmd, errno, "while changing ownership of %s", name); | |
93 | ||
2e8d40d5 TT |
94 | ut.actime = inode->i_atime; |
95 | ut.modtime = inode->i_mtime; | |
96 | if (utime(name, &ut) == -1) | |
97 | com_err(cmd, errno, "while setting times of %s", name); | |
98 | } | |
99 | ||
b044c2e0 TT |
100 | static void dump_file(const char *cmdname, ext2_ino_t ino, int fd, |
101 | int preserve, char *outname) | |
f3db3566 TT |
102 | { |
103 | errcode_t retval; | |
fc6d9d51 | 104 | struct ext2_inode inode; |
d3b4de41 | 105 | char *buf = 0; |
5a51384e | 106 | ext2_file_t e2_file; |
4a31c48b | 107 | int nbytes; |
d3b4de41 | 108 | unsigned int got, blocksize = current_fs->blocksize; |
efc6f628 | 109 | |
e1018eea | 110 | if (debugfs_read_inode(ino, &inode, cmdname)) |
fc6d9d51 | 111 | return; |
f3db3566 | 112 | |
5a51384e TT |
113 | retval = ext2fs_file_open(current_fs, ino, 0, &e2_file); |
114 | if (retval) { | |
115 | com_err(cmdname, retval, "while opening ext2 file"); | |
f3db3566 TT |
116 | return; |
117 | } | |
d3b4de41 ZL |
118 | retval = ext2fs_get_mem(blocksize, &buf); |
119 | if (retval) { | |
120 | com_err(cmdname, retval, "while allocating memory"); | |
121 | return; | |
122 | } | |
5a51384e | 123 | while (1) { |
d3b4de41 | 124 | retval = ext2fs_file_read(e2_file, buf, blocksize, &got); |
efc6f628 | 125 | if (retval) |
5a51384e TT |
126 | com_err(cmdname, retval, "while reading ext2 file"); |
127 | if (got == 0) | |
128 | break; | |
129 | nbytes = write(fd, buf, got); | |
54434927 | 130 | if ((unsigned) nbytes != got) |
5a51384e | 131 | com_err(cmdname, errno, "while writing file"); |
f3db3566 | 132 | } |
d3b4de41 ZL |
133 | if (buf) |
134 | ext2fs_free_mem(&buf); | |
5a51384e TT |
135 | retval = ext2fs_file_close(e2_file); |
136 | if (retval) { | |
137 | com_err(cmdname, retval, "while closing ext2 file"); | |
138 | return; | |
f3db3566 | 139 | } |
efc6f628 | 140 | |
2e8d40d5 TT |
141 | if (preserve) |
142 | fix_perms("dump_file", &inode, fd, outname); | |
efc6f628 | 143 | |
f3db3566 TT |
144 | return; |
145 | } | |
146 | ||
2fcbcb1b TT |
147 | void do_dump(int argc, char **argv, int sci_idx EXT2FS_ATTR((unused)), |
148 | void *infop EXT2FS_ATTR((unused))) | |
f3db3566 | 149 | { |
b044c2e0 TT |
150 | ext2_ino_t inode; |
151 | int fd; | |
152 | int c; | |
153 | int preserve = 0; | |
b044c2e0 | 154 | char *in_fn, *out_fn; |
efc6f628 | 155 | |
88494bb6 | 156 | reset_getopt(); |
fc6d9d51 TT |
157 | while ((c = getopt (argc, argv, "p")) != EOF) { |
158 | switch (c) { | |
159 | case 'p': | |
160 | preserve++; | |
161 | break; | |
162 | default: | |
5299580c TT |
163 | print_usage: |
164 | com_err(argv[0], 0, "Usage: dump_inode [-p] " | |
165 | "<file> <output_file>"); | |
fc6d9d51 TT |
166 | return; |
167 | } | |
168 | } | |
5299580c TT |
169 | if (optind != argc-2) |
170 | goto print_usage; | |
f3db3566 TT |
171 | |
172 | if (check_fs_open(argv[0])) | |
173 | return; | |
174 | ||
fc6d9d51 TT |
175 | in_fn = argv[optind]; |
176 | out_fn = argv[optind+1]; | |
177 | ||
178 | inode = string_to_inode(in_fn); | |
efc6f628 | 179 | if (!inode) |
f3db3566 TT |
180 | return; |
181 | ||
819157db | 182 | fd = open(out_fn, O_CREAT | O_WRONLY | O_TRUNC | O_LARGEFILE, 0666); |
f3db3566 TT |
183 | if (fd < 0) { |
184 | com_err(argv[0], errno, "while opening %s for dump_inode", | |
fc6d9d51 | 185 | out_fn); |
f3db3566 TT |
186 | return; |
187 | } | |
188 | ||
fc6d9d51 | 189 | dump_file(argv[0], inode, fd, preserve, out_fn); |
ddbe7852 DW |
190 | if (close(fd) != 0) { |
191 | com_err(argv[0], errno, "while closing %s for dump_inode", | |
192 | out_fn); | |
193 | return; | |
194 | } | |
f3db3566 | 195 | |
f3db3566 TT |
196 | return; |
197 | } | |
198 | ||
b044c2e0 | 199 | static void rdump_symlink(ext2_ino_t ino, struct ext2_inode *inode, |
2e8d40d5 TT |
200 | const char *fullname) |
201 | { | |
202 | ext2_file_t e2_file; | |
203 | char *buf; | |
204 | errcode_t retval; | |
205 | ||
206 | buf = malloc(inode->i_size + 1); | |
207 | if (!buf) { | |
208 | com_err("rdump", errno, "while allocating for symlink"); | |
209 | goto errout; | |
210 | } | |
211 | ||
cf0be234 | 212 | if (ext2fs_is_fast_symlink(inode)) |
2e8d40d5 TT |
213 | strcpy(buf, (char *) inode->i_block); |
214 | else { | |
215 | unsigned bytes = inode->i_size; | |
216 | char *p = buf; | |
217 | retval = ext2fs_file_open(current_fs, ino, 0, &e2_file); | |
218 | if (retval) { | |
219 | com_err("rdump", retval, "while opening symlink"); | |
220 | goto errout; | |
221 | } | |
222 | for (;;) { | |
223 | unsigned int got; | |
224 | retval = ext2fs_file_read(e2_file, p, bytes, &got); | |
225 | if (retval) { | |
226 | com_err("rdump", retval, "while reading symlink"); | |
227 | goto errout; | |
228 | } | |
229 | bytes -= got; | |
230 | p += got; | |
231 | if (got == 0 || bytes == 0) | |
232 | break; | |
233 | } | |
234 | buf[inode->i_size] = 0; | |
235 | retval = ext2fs_file_close(e2_file); | |
236 | if (retval) | |
237 | com_err("rdump", retval, "while closing symlink"); | |
238 | } | |
239 | ||
240 | if (symlink(buf, fullname) == -1) { | |
241 | com_err("rdump", errno, "while creating symlink %s -> %s", buf, fullname); | |
242 | goto errout; | |
243 | } | |
244 | ||
245 | errout: | |
246 | free(buf); | |
247 | } | |
248 | ||
249 | static int rdump_dirent(struct ext2_dir_entry *, int, int, char *, void *); | |
250 | ||
b044c2e0 | 251 | static void rdump_inode(ext2_ino_t ino, struct ext2_inode *inode, |
2e8d40d5 TT |
252 | const char *name, const char *dumproot) |
253 | { | |
254 | char *fullname; | |
2e8d40d5 TT |
255 | |
256 | /* There are more efficient ways to do this, but this method | |
257 | * requires only minimal debugging. */ | |
258 | fullname = malloc(strlen(dumproot) + strlen(name) + 2); | |
259 | if (!fullname) { | |
260 | com_err("rdump", errno, "while allocating memory"); | |
261 | return; | |
262 | } | |
263 | sprintf(fullname, "%s/%s", dumproot, name); | |
264 | ||
265 | if (LINUX_S_ISLNK(inode->i_mode)) | |
266 | rdump_symlink(ino, inode, fullname); | |
267 | else if (LINUX_S_ISREG(inode->i_mode)) { | |
268 | int fd; | |
efac5a7f | 269 | fd = open(fullname, O_WRONLY | O_CREAT | O_TRUNC | O_LARGEFILE, S_IRWXU); |
2e8d40d5 | 270 | if (fd == -1) { |
09727a07 | 271 | com_err("rdump", errno, "while opening %s", fullname); |
2e8d40d5 TT |
272 | goto errout; |
273 | } | |
274 | dump_file("rdump", ino, fd, 1, fullname); | |
ddbe7852 | 275 | if (close(fd) != 0) { |
09727a07 | 276 | com_err("rdump", errno, "while closing %s", fullname); |
ddbe7852 DW |
277 | goto errout; |
278 | } | |
2e8d40d5 TT |
279 | } |
280 | else if (LINUX_S_ISDIR(inode->i_mode) && strcmp(name, ".") && strcmp(name, "..")) { | |
281 | errcode_t retval; | |
282 | ||
283 | /* Create the directory with 0700 permissions, because we | |
284 | * expect to have to create entries it. Then fix its perms | |
285 | * once we've done the traversal. */ | |
ebb8b1aa | 286 | if (name[0] && mkdir(fullname, S_IRWXU) == -1) { |
2e8d40d5 TT |
287 | com_err("rdump", errno, "while making directory %s", fullname); |
288 | goto errout; | |
289 | } | |
290 | ||
291 | retval = ext2fs_dir_iterate(current_fs, ino, 0, 0, | |
292 | rdump_dirent, (void *) fullname); | |
293 | if (retval) | |
294 | com_err("rdump", retval, "while dumping %s", fullname); | |
295 | ||
296 | fix_perms("rdump", inode, -1, fullname); | |
297 | } | |
298 | /* else do nothing (don't dump device files, sockets, fifos, etc.) */ | |
299 | ||
300 | errout: | |
301 | free(fullname); | |
302 | } | |
303 | ||
efc6f628 | 304 | static int rdump_dirent(struct ext2_dir_entry *dirent, |
54434927 TT |
305 | int offset EXT2FS_ATTR((unused)), |
306 | int blocksize EXT2FS_ATTR((unused)), | |
307 | char *buf EXT2FS_ATTR((unused)), void *private) | |
2e8d40d5 | 308 | { |
b772900b | 309 | char name[EXT2_NAME_LEN + 1]; |
2e8d40d5 TT |
310 | int thislen; |
311 | const char *dumproot = private; | |
312 | struct ext2_inode inode; | |
2e8d40d5 | 313 | |
70f4632b | 314 | thislen = ext2fs_dirent_name_len(dirent); |
2e8d40d5 TT |
315 | strncpy(name, dirent->name, thislen); |
316 | name[thislen] = 0; | |
317 | ||
e1018eea | 318 | if (debugfs_read_inode(dirent->inode, &inode, name)) |
2e8d40d5 | 319 | return 0; |
2e8d40d5 TT |
320 | |
321 | rdump_inode(dirent->inode, &inode, name, dumproot); | |
322 | ||
323 | return 0; | |
324 | } | |
325 | ||
2fcbcb1b TT |
326 | void do_rdump(int argc, char **argv, int sci_idx EXT2FS_ATTR((unused)), |
327 | void *infop EXT2FS_ATTR((unused))) | |
2e8d40d5 | 328 | { |
2e8d40d5 | 329 | struct stat st; |
b6edbf6b | 330 | char *dest_dir; |
2e8d40d5 | 331 | int i; |
2e8d40d5 | 332 | |
b6edbf6b AC |
333 | if (common_args_process(argc, argv, 3, INT_MAX, "rdump", |
334 | "<directory>... <native directory>", 0)) | |
2e8d40d5 TT |
335 | return; |
336 | ||
850fe1ac AC |
337 | /* Pull out last argument */ |
338 | dest_dir = argv[argc - 1]; | |
339 | argc--; | |
2e8d40d5 | 340 | |
850fe1ac AC |
341 | /* Ensure last arg is a directory. */ |
342 | if (stat(dest_dir, &st) == -1) { | |
343 | com_err("rdump", errno, "while statting %s", dest_dir); | |
2e8d40d5 TT |
344 | return; |
345 | } | |
346 | if (!S_ISDIR(st.st_mode)) { | |
850fe1ac | 347 | com_err("rdump", 0, "%s is not a directory", dest_dir); |
2e8d40d5 TT |
348 | return; |
349 | } | |
350 | ||
b6edbf6b AC |
351 | for (i = 1; i < argc; i++) { |
352 | char *arg = argv[i], *basename; | |
353 | struct ext2_inode inode; | |
354 | ext2_ino_t ino = string_to_inode(arg); | |
355 | if (!ino) | |
356 | continue; | |
2e8d40d5 | 357 | |
b6edbf6b AC |
358 | if (debugfs_read_inode(ino, &inode, arg)) |
359 | continue; | |
2e8d40d5 | 360 | |
b6edbf6b AC |
361 | basename = strrchr(arg, '/'); |
362 | if (basename) | |
363 | basename++; | |
364 | else | |
365 | basename = arg; | |
366 | ||
367 | rdump_inode(ino, &inode, basename, dest_dir); | |
368 | } | |
2e8d40d5 TT |
369 | } |
370 | ||
2fcbcb1b TT |
371 | void do_cat(int argc, char **argv, int sci_idx EXT2FS_ATTR((unused)), |
372 | void *infop EXT2FS_ATTR((unused))) | |
f3db3566 | 373 | { |
b044c2e0 | 374 | ext2_ino_t inode; |
f3db3566 | 375 | |
e1018eea | 376 | if (common_inode_args_process(argc, argv, &inode, 0)) |
f3db3566 TT |
377 | return; |
378 | ||
fc6d9d51 TT |
379 | fflush(stdout); |
380 | fflush(stderr); | |
efc6f628 | 381 | dump_file(argv[0], inode, 1, 0, argv[2]); |
f3db3566 TT |
382 | |
383 | return; | |
384 | } | |
385 |