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1227625a SP |
1 | /* |
2 | * Ported to Linux's Second Extended File System as part of the | |
3 | * dump and restore backup suit | |
b45f51d6 SP |
4 | * Remy Card <card@Linux.EU.Org>, 1994-1997 |
5 | * Stelian Pop <pop@cybercable.fr>, 1999 | |
1227625a SP |
6 | * |
7 | */ | |
8 | ||
9 | /* | |
10 | * Copyright (c) 1983, 1993 | |
11 | * The Regents of the University of California. All rights reserved. | |
12 | * | |
13 | * Redistribution and use in source and binary forms, with or without | |
14 | * modification, are permitted provided that the following conditions | |
15 | * are met: | |
16 | * 1. Redistributions of source code must retain the above copyright | |
17 | * notice, this list of conditions and the following disclaimer. | |
18 | * 2. Redistributions in binary form must reproduce the above copyright | |
19 | * notice, this list of conditions and the following disclaimer in the | |
20 | * documentation and/or other materials provided with the distribution. | |
21 | * 3. All advertising materials mentioning features or use of this software | |
22 | * must display the following acknowledgement: | |
23 | * This product includes software developed by the University of | |
24 | * California, Berkeley and its contributors. | |
25 | * 4. Neither the name of the University nor the names of its contributors | |
26 | * may be used to endorse or promote products derived from this software | |
27 | * without specific prior written permission. | |
28 | * | |
29 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND | |
30 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
31 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
32 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
33 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
34 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
35 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
36 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
37 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
38 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
39 | * SUCH DAMAGE. | |
ec387a12 SP |
40 | * |
41 | * $Id: utilities.c,v 1.5 1999/10/11 13:31:14 stelian Exp $ | |
1227625a SP |
42 | */ |
43 | ||
1227625a SP |
44 | #include <sys/param.h> |
45 | #include <sys/stat.h> | |
46 | ||
47 | #ifdef __linux__ | |
48 | #include <sys/time.h> | |
49 | #include <linux/ext2_fs.h> | |
50 | #include <bsdcompat.h> | |
51 | #else /* __linux__ */ | |
52 | #include <ufs/ufs/dinode.h> | |
53 | #include <ufs/ufs/dir.h> | |
54 | #endif /* __linux__ */ | |
55 | ||
56 | #include <errno.h> | |
ddd2ef55 | 57 | #include <compaterr.h> |
1227625a | 58 | #include <stdio.h> |
1227625a SP |
59 | #include <string.h> |
60 | #include <unistd.h> | |
61 | ||
62 | #ifdef __linux__ | |
63 | #include <ext2fs/ext2fs.h> | |
64 | #endif | |
65 | ||
66 | #include "restore.h" | |
67 | #include "extern.h" | |
68 | ||
69 | /* | |
70 | * Insure that all the components of a pathname exist. | |
71 | */ | |
72 | void | |
ddd2ef55 | 73 | pathcheck(char *name) |
1227625a SP |
74 | { |
75 | register char *cp; | |
76 | struct entry *ep; | |
77 | char *start; | |
78 | ||
b45f51d6 | 79 | start = strchr(name, '/'); |
1227625a SP |
80 | if (start == 0) |
81 | return; | |
82 | for (cp = start; *cp != '\0'; cp++) { | |
83 | if (*cp != '/') | |
84 | continue; | |
85 | *cp = '\0'; | |
86 | ep = lookupname(name); | |
87 | if (ep == NULL) { | |
88 | /* Safe; we know the pathname exists in the dump. */ | |
89 | ep = addentry(name, pathsearch(name)->d_ino, NODE); | |
90 | newnode(ep); | |
91 | } | |
92 | ep->e_flags |= NEW|KEEP; | |
93 | *cp = '/'; | |
94 | } | |
95 | } | |
96 | ||
97 | /* | |
98 | * Change a name to a unique temporary name. | |
99 | */ | |
100 | void | |
ddd2ef55 | 101 | mktempname(struct entry *ep) |
1227625a SP |
102 | { |
103 | char oldname[MAXPATHLEN]; | |
104 | ||
105 | if (ep->e_flags & TMPNAME) | |
106 | badentry(ep, "mktempname: called with TMPNAME"); | |
107 | ep->e_flags |= TMPNAME; | |
108 | (void) strcpy(oldname, myname(ep)); | |
109 | freename(ep->e_name); | |
110 | ep->e_name = savename(gentempname(ep)); | |
111 | ep->e_namlen = strlen(ep->e_name); | |
112 | renameit(oldname, myname(ep)); | |
113 | } | |
114 | ||
115 | /* | |
116 | * Generate a temporary name for an entry. | |
117 | */ | |
118 | char * | |
ddd2ef55 | 119 | gentempname(struct entry *ep) |
1227625a SP |
120 | { |
121 | static char name[MAXPATHLEN]; | |
122 | struct entry *np; | |
123 | long i = 0; | |
124 | ||
125 | for (np = lookupino(ep->e_ino); | |
126 | np != NULL && np != ep; np = np->e_links) | |
127 | i++; | |
128 | if (np == NULL) | |
129 | badentry(ep, "not on ino list"); | |
ddd2ef55 | 130 | (void) snprintf(name, sizeof(name), "%s%ld%lu", TMPHDR, i, (unsigned long)ep->e_ino); |
1227625a SP |
131 | return (name); |
132 | } | |
133 | ||
134 | /* | |
135 | * Rename a file or directory. | |
136 | */ | |
137 | void | |
ddd2ef55 | 138 | renameit(char *from, char *to) |
1227625a SP |
139 | { |
140 | if (!Nflag && rename(from, to) < 0) { | |
ddd2ef55 | 141 | warn("cannot rename %s to %s", from, to); |
1227625a SP |
142 | return; |
143 | } | |
ddd2ef55 | 144 | Vprintf(stdout, "rename %s to %s\n", from, to); |
1227625a SP |
145 | } |
146 | ||
147 | /* | |
148 | * Create a new node (directory). | |
149 | */ | |
150 | void | |
ddd2ef55 | 151 | newnode(struct entry *np) |
1227625a SP |
152 | { |
153 | char *cp; | |
1227625a SP |
154 | if (np->e_type != NODE) |
155 | badentry(np, "newnode: not a node"); | |
156 | cp = myname(np); | |
157 | if (command == 'C') return; | |
b45f51d6 SP |
158 | |
159 | if (!Nflag && mkdir(cp, 0777) < 0 && !uflag) { | |
1227625a | 160 | np->e_flags |= EXISTED; |
ddd2ef55 | 161 | warn("%s", cp); |
1227625a SP |
162 | return; |
163 | } | |
ddd2ef55 | 164 | Vprintf(stdout, "Make node %s\n", cp); |
1227625a SP |
165 | } |
166 | ||
167 | /* | |
168 | * Remove an old node (directory). | |
169 | */ | |
170 | void | |
ddd2ef55 | 171 | removenode(struct entry *ep) |
1227625a SP |
172 | { |
173 | char *cp; | |
174 | ||
175 | if (ep->e_type != NODE) | |
176 | badentry(ep, "removenode: not a node"); | |
177 | if (ep->e_entries != NULL) | |
178 | badentry(ep, "removenode: non-empty directory"); | |
179 | ep->e_flags |= REMOVED; | |
180 | ep->e_flags &= ~TMPNAME; | |
181 | cp = myname(ep); | |
182 | if (!Nflag && rmdir(cp) < 0) { | |
ddd2ef55 | 183 | warn("%s", cp); |
1227625a SP |
184 | return; |
185 | } | |
ddd2ef55 | 186 | Vprintf(stdout, "Remove node %s\n", cp); |
1227625a SP |
187 | } |
188 | ||
189 | /* | |
190 | * Remove a leaf. | |
191 | */ | |
192 | void | |
ddd2ef55 | 193 | removeleaf(struct entry *ep) |
1227625a SP |
194 | { |
195 | char *cp; | |
196 | ||
197 | if (command == 'C') return; | |
198 | ||
199 | if (ep->e_type != LEAF) | |
200 | badentry(ep, "removeleaf: not a leaf"); | |
201 | ep->e_flags |= REMOVED; | |
202 | ep->e_flags &= ~TMPNAME; | |
203 | cp = myname(ep); | |
204 | if (!Nflag && unlink(cp) < 0) { | |
ddd2ef55 | 205 | warn("%s", cp); |
1227625a SP |
206 | return; |
207 | } | |
ddd2ef55 | 208 | Vprintf(stdout, "Remove leaf %s\n", cp); |
1227625a SP |
209 | } |
210 | ||
211 | /* | |
212 | * Create a link. | |
213 | */ | |
214 | int | |
ddd2ef55 | 215 | linkit(char *existing, char *new, int type) |
1227625a SP |
216 | { |
217 | ||
b45f51d6 SP |
218 | /* if we want to unlink first, do it now so *link() won't fail */ |
219 | if (uflag && !Nflag) | |
220 | (void)unlink(new); | |
221 | ||
1227625a SP |
222 | if (type == SYMLINK) { |
223 | if (!Nflag && symlink(existing, new) < 0) { | |
ddd2ef55 SP |
224 | warn("cannot create symbolic link %s->%s", |
225 | new, existing); | |
1227625a SP |
226 | return (FAIL); |
227 | } | |
228 | } else if (type == HARDLINK) { | |
b45f51d6 SP |
229 | int ret; |
230 | ||
231 | if (!Nflag && (ret = link(existing, new)) < 0) { | |
232 | ||
233 | #ifndef __linux__ | |
234 | struct stat s; | |
235 | ||
236 | /* | |
237 | * Most likely, the schg flag is set. Clear the | |
238 | * flags and try again. | |
239 | */ | |
240 | if (stat(existing, &s) == 0 && s.st_flags != 0 && | |
241 | chflags(existing, 0) == 0) { | |
242 | ret = link(existing, new); | |
243 | chflags(existing, s.st_flags); | |
244 | } | |
245 | #endif | |
246 | if (ret < 0) { | |
ddd2ef55 SP |
247 | warn("warning: cannot create hard link %s->%s", |
248 | new, existing); | |
b45f51d6 SP |
249 | return (FAIL); |
250 | } | |
1227625a SP |
251 | } |
252 | } else { | |
253 | panic("linkit: unknown type %d\n", type); | |
254 | return (FAIL); | |
255 | } | |
ddd2ef55 | 256 | Vprintf(stdout, "Create %s link %s->%s\n", |
1227625a SP |
257 | type == SYMLINK ? "symbolic" : "hard", new, existing); |
258 | return (GOOD); | |
259 | } | |
260 | ||
261 | #ifndef __linux__ | |
262 | /* | |
b45f51d6 | 263 | * Create a whiteout. |
1227625a SP |
264 | */ |
265 | int | |
ddd2ef55 | 266 | addwhiteout(char *name) |
1227625a SP |
267 | { |
268 | ||
269 | if (!Nflag && mknod(name, S_IFWHT, 0) < 0) { | |
ddd2ef55 | 270 | warn("cannot create whiteout %s", name); |
1227625a SP |
271 | return (FAIL); |
272 | } | |
ddd2ef55 | 273 | Vprintf(stdout, "Create whiteout %s\n", name); |
1227625a SP |
274 | return (GOOD); |
275 | } | |
276 | ||
277 | /* | |
278 | * Delete a whiteout. | |
279 | */ | |
280 | void | |
ddd2ef55 | 281 | delwhiteout(struct entry *ep) |
1227625a SP |
282 | { |
283 | char *name; | |
284 | ||
285 | if (ep->e_type != LEAF) | |
286 | badentry(ep, "delwhiteout: not a leaf"); | |
287 | ep->e_flags |= REMOVED; | |
288 | ep->e_flags &= ~TMPNAME; | |
289 | name = myname(ep); | |
290 | if (!Nflag && undelete(name) < 0) { | |
ddd2ef55 | 291 | warn("cannot delete whiteout %s", name); |
1227625a SP |
292 | return; |
293 | } | |
ddd2ef55 | 294 | Vprintf(stdout, "Delete whiteout %s\n", name); |
1227625a SP |
295 | } |
296 | #endif | |
297 | ||
298 | /* | |
299 | * find lowest number file (above "start") that needs to be extracted | |
300 | */ | |
301 | ino_t | |
ddd2ef55 | 302 | lowerbnd(ino_t start) |
1227625a SP |
303 | { |
304 | register struct entry *ep; | |
305 | ||
306 | for ( ; start < maxino; start++) { | |
307 | ep = lookupino(start); | |
308 | if (ep == NULL || ep->e_type == NODE) | |
309 | continue; | |
310 | if (ep->e_flags & (NEW|EXTRACT)) | |
311 | return (start); | |
312 | } | |
313 | return (start); | |
314 | } | |
315 | ||
316 | /* | |
317 | * find highest number file (below "start") that needs to be extracted | |
318 | */ | |
319 | ino_t | |
ddd2ef55 | 320 | upperbnd(ino_t start) |
1227625a SP |
321 | { |
322 | register struct entry *ep; | |
323 | ||
324 | for ( ; start > ROOTINO; start--) { | |
325 | ep = lookupino(start); | |
326 | if (ep == NULL || ep->e_type == NODE) | |
327 | continue; | |
328 | if (ep->e_flags & (NEW|EXTRACT)) | |
329 | return (start); | |
330 | } | |
331 | return (start); | |
332 | } | |
333 | ||
334 | /* | |
335 | * report on a badly formed entry | |
336 | */ | |
337 | void | |
ddd2ef55 | 338 | badentry(struct entry *ep, const char *msg) |
1227625a SP |
339 | { |
340 | ||
341 | fprintf(stderr, "bad entry: %s\n", msg); | |
342 | fprintf(stderr, "name: %s\n", myname(ep)); | |
343 | fprintf(stderr, "parent name %s\n", myname(ep->e_parent)); | |
344 | if (ep->e_sibling != NULL) | |
345 | fprintf(stderr, "sibling name: %s\n", myname(ep->e_sibling)); | |
346 | if (ep->e_entries != NULL) | |
347 | fprintf(stderr, "next entry name: %s\n", myname(ep->e_entries)); | |
348 | if (ep->e_links != NULL) | |
349 | fprintf(stderr, "next link name: %s\n", myname(ep->e_links)); | |
350 | if (ep->e_next != NULL) | |
351 | fprintf(stderr, | |
352 | "next hashchain name: %s\n", myname(ep->e_next)); | |
353 | fprintf(stderr, "entry type: %s\n", | |
354 | ep->e_type == NODE ? "NODE" : "LEAF"); | |
ddd2ef55 | 355 | fprintf(stderr, "inode number: %lu\n", (unsigned long)ep->e_ino); |
1227625a SP |
356 | panic("flags: %s\n", flagvalues(ep)); |
357 | } | |
358 | ||
359 | /* | |
360 | * Construct a string indicating the active flag bits of an entry. | |
361 | */ | |
362 | char * | |
ddd2ef55 | 363 | flagvalues(struct entry *ep) |
1227625a SP |
364 | { |
365 | static char flagbuf[BUFSIZ]; | |
366 | ||
367 | (void) strcpy(flagbuf, "|NIL"); | |
368 | flagbuf[0] = '\0'; | |
369 | if (ep->e_flags & REMOVED) | |
370 | (void) strcat(flagbuf, "|REMOVED"); | |
371 | if (ep->e_flags & TMPNAME) | |
372 | (void) strcat(flagbuf, "|TMPNAME"); | |
373 | if (ep->e_flags & EXTRACT) | |
374 | (void) strcat(flagbuf, "|EXTRACT"); | |
375 | if (ep->e_flags & NEW) | |
376 | (void) strcat(flagbuf, "|NEW"); | |
377 | if (ep->e_flags & KEEP) | |
378 | (void) strcat(flagbuf, "|KEEP"); | |
379 | if (ep->e_flags & EXISTED) | |
380 | (void) strcat(flagbuf, "|EXISTED"); | |
381 | return (&flagbuf[1]); | |
382 | } | |
383 | ||
384 | /* | |
385 | * Check to see if a name is on a dump tape. | |
386 | */ | |
387 | ino_t | |
ddd2ef55 | 388 | dirlookup(const char *name) |
1227625a SP |
389 | { |
390 | struct direct *dp; | |
391 | ino_t ino; | |
b45f51d6 | 392 | |
1227625a SP |
393 | ino = ((dp = pathsearch(name)) == NULL) ? 0 : dp->d_ino; |
394 | ||
395 | if (ino == 0 || TSTINO(ino, dumpmap) == 0) | |
396 | fprintf(stderr, "%s is not on the tape\n", name); | |
397 | return (ino); | |
398 | } | |
399 | ||
400 | /* | |
401 | * Elicit a reply. | |
402 | */ | |
403 | int | |
ddd2ef55 | 404 | reply(const char *question) |
1227625a SP |
405 | { |
406 | char c; | |
407 | ||
408 | do { | |
409 | fprintf(stderr, "%s? [yn] ", question); | |
410 | (void) fflush(stderr); | |
411 | c = getc(terminal); | |
412 | while (c != '\n' && getc(terminal) != '\n') | |
413 | if (feof(terminal)) | |
414 | return (FAIL); | |
415 | } while (c != 'y' && c != 'n'); | |
416 | if (c == 'y') | |
417 | return (GOOD); | |
418 | return (FAIL); | |
419 | } | |
420 | ||
421 | /* | |
422 | * handle unexpected inconsistencies | |
423 | */ | |
ddd2ef55 | 424 | #ifdef __STDC__ |
1227625a SP |
425 | #include <stdarg.h> |
426 | #else | |
427 | #include <varargs.h> | |
428 | #endif | |
429 | ||
430 | void | |
ddd2ef55 | 431 | #ifdef __STDC__ |
1227625a SP |
432 | panic(const char *fmt, ...) |
433 | #else | |
434 | panic(fmt, va_alist) | |
435 | char *fmt; | |
436 | va_dcl | |
437 | #endif | |
438 | { | |
439 | va_list ap; | |
ddd2ef55 | 440 | #ifdef __STDC__ |
1227625a SP |
441 | va_start(ap, fmt); |
442 | #else | |
443 | va_start(ap); | |
444 | #endif | |
445 | ||
446 | vfprintf(stderr, fmt, ap); | |
447 | if (yflag) | |
448 | return; | |
449 | if (reply("abort") == GOOD) { | |
450 | if (reply("dump core") == GOOD) | |
451 | abort(); | |
ddd2ef55 | 452 | exit(1); |
1227625a SP |
453 | } |
454 | } |