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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. | |
40 | */ | |
41 | ||
42 | #ifndef lint | |
b45f51d6 | 43 | #if 0 |
1227625a | 44 | static char sccsid[] = "@(#)utilities.c 8.5 (Berkeley) 4/28/95"; |
b45f51d6 SP |
45 | #endif |
46 | static const char rcsid[] = | |
47 | "$Id: utilities.c,v 1.2 1999/10/11 12:53:25 stelian Exp $"; | |
1227625a SP |
48 | #endif /* not lint */ |
49 | ||
50 | #include <sys/param.h> | |
51 | #include <sys/stat.h> | |
52 | ||
53 | #ifdef __linux__ | |
54 | #include <sys/time.h> | |
55 | #include <linux/ext2_fs.h> | |
56 | #include <bsdcompat.h> | |
57 | #else /* __linux__ */ | |
58 | #include <ufs/ufs/dinode.h> | |
59 | #include <ufs/ufs/dir.h> | |
60 | #endif /* __linux__ */ | |
61 | ||
62 | #include <errno.h> | |
63 | #include <stdio.h> | |
1227625a SP |
64 | #include <string.h> |
65 | #include <unistd.h> | |
66 | ||
67 | #ifdef __linux__ | |
68 | #include <ext2fs/ext2fs.h> | |
69 | #endif | |
70 | ||
71 | #include "restore.h" | |
72 | #include "extern.h" | |
73 | ||
74 | /* | |
75 | * Insure that all the components of a pathname exist. | |
76 | */ | |
77 | void | |
78 | pathcheck(name) | |
79 | char *name; | |
80 | { | |
81 | register char *cp; | |
82 | struct entry *ep; | |
83 | char *start; | |
84 | ||
b45f51d6 | 85 | start = strchr(name, '/'); |
1227625a SP |
86 | if (start == 0) |
87 | return; | |
88 | for (cp = start; *cp != '\0'; cp++) { | |
89 | if (*cp != '/') | |
90 | continue; | |
91 | *cp = '\0'; | |
92 | ep = lookupname(name); | |
93 | if (ep == NULL) { | |
94 | /* Safe; we know the pathname exists in the dump. */ | |
95 | ep = addentry(name, pathsearch(name)->d_ino, NODE); | |
96 | newnode(ep); | |
97 | } | |
98 | ep->e_flags |= NEW|KEEP; | |
99 | *cp = '/'; | |
100 | } | |
101 | } | |
102 | ||
103 | /* | |
104 | * Change a name to a unique temporary name. | |
105 | */ | |
106 | void | |
107 | mktempname(ep) | |
108 | register struct entry *ep; | |
109 | { | |
110 | char oldname[MAXPATHLEN]; | |
111 | ||
112 | if (ep->e_flags & TMPNAME) | |
113 | badentry(ep, "mktempname: called with TMPNAME"); | |
114 | ep->e_flags |= TMPNAME; | |
115 | (void) strcpy(oldname, myname(ep)); | |
116 | freename(ep->e_name); | |
117 | ep->e_name = savename(gentempname(ep)); | |
118 | ep->e_namlen = strlen(ep->e_name); | |
119 | renameit(oldname, myname(ep)); | |
120 | } | |
121 | ||
122 | /* | |
123 | * Generate a temporary name for an entry. | |
124 | */ | |
125 | char * | |
126 | gentempname(ep) | |
127 | struct entry *ep; | |
128 | { | |
129 | static char name[MAXPATHLEN]; | |
130 | struct entry *np; | |
131 | long i = 0; | |
132 | ||
133 | for (np = lookupino(ep->e_ino); | |
134 | np != NULL && np != ep; np = np->e_links) | |
135 | i++; | |
136 | if (np == NULL) | |
137 | badentry(ep, "not on ino list"); | |
b45f51d6 | 138 | (void) sprintf(name, "%s%ld%lu", TMPHDR, i, (u_long)ep->e_ino); |
1227625a SP |
139 | return (name); |
140 | } | |
141 | ||
142 | /* | |
143 | * Rename a file or directory. | |
144 | */ | |
145 | void | |
146 | renameit(from, to) | |
147 | char *from, *to; | |
148 | { | |
149 | if (!Nflag && rename(from, to) < 0) { | |
150 | fprintf(stderr, "warning: cannot rename %s to %s: %s\n", | |
151 | from, to, strerror(errno)); | |
152 | return; | |
153 | } | |
154 | vprintf(stdout, "rename %s to %s\n", from, to); | |
155 | } | |
156 | ||
157 | /* | |
158 | * Create a new node (directory). | |
159 | */ | |
160 | void | |
161 | newnode(np) | |
162 | struct entry *np; | |
163 | { | |
164 | char *cp; | |
165 | ||
166 | if (np->e_type != NODE) | |
167 | badentry(np, "newnode: not a node"); | |
168 | cp = myname(np); | |
169 | if (command == 'C') return; | |
b45f51d6 SP |
170 | |
171 | if (!Nflag && mkdir(cp, 0777) < 0 && !uflag) { | |
1227625a SP |
172 | np->e_flags |= EXISTED; |
173 | fprintf(stderr, "warning: %s: %s\n", cp, strerror(errno)); | |
174 | return; | |
175 | } | |
176 | vprintf(stdout, "Make node %s\n", cp); | |
177 | } | |
178 | ||
179 | /* | |
180 | * Remove an old node (directory). | |
181 | */ | |
182 | void | |
183 | removenode(ep) | |
184 | register struct entry *ep; | |
185 | { | |
186 | char *cp; | |
187 | ||
188 | if (ep->e_type != NODE) | |
189 | badentry(ep, "removenode: not a node"); | |
190 | if (ep->e_entries != NULL) | |
191 | badentry(ep, "removenode: non-empty directory"); | |
192 | ep->e_flags |= REMOVED; | |
193 | ep->e_flags &= ~TMPNAME; | |
194 | cp = myname(ep); | |
195 | if (!Nflag && rmdir(cp) < 0) { | |
196 | fprintf(stderr, "warning: %s: %s\n", cp, strerror(errno)); | |
197 | return; | |
198 | } | |
199 | vprintf(stdout, "Remove node %s\n", cp); | |
200 | } | |
201 | ||
202 | /* | |
203 | * Remove a leaf. | |
204 | */ | |
205 | void | |
206 | removeleaf(ep) | |
207 | register struct entry *ep; | |
208 | { | |
209 | char *cp; | |
210 | ||
211 | if (command == 'C') return; | |
212 | ||
213 | if (ep->e_type != LEAF) | |
214 | badentry(ep, "removeleaf: not a leaf"); | |
215 | ep->e_flags |= REMOVED; | |
216 | ep->e_flags &= ~TMPNAME; | |
217 | cp = myname(ep); | |
218 | if (!Nflag && unlink(cp) < 0) { | |
219 | fprintf(stderr, "warning: %s: %s\n", cp, strerror(errno)); | |
220 | return; | |
221 | } | |
222 | vprintf(stdout, "Remove leaf %s\n", cp); | |
223 | } | |
224 | ||
225 | /* | |
226 | * Create a link. | |
227 | */ | |
228 | int | |
229 | linkit(existing, new, type) | |
230 | char *existing, *new; | |
231 | int type; | |
232 | { | |
233 | ||
b45f51d6 SP |
234 | /* if we want to unlink first, do it now so *link() won't fail */ |
235 | if (uflag && !Nflag) | |
236 | (void)unlink(new); | |
237 | ||
1227625a SP |
238 | if (type == SYMLINK) { |
239 | if (!Nflag && symlink(existing, new) < 0) { | |
240 | fprintf(stderr, | |
241 | "warning: cannot create symbolic link %s->%s: %s\n", | |
242 | new, existing, strerror(errno)); | |
243 | return (FAIL); | |
244 | } | |
245 | } else if (type == HARDLINK) { | |
b45f51d6 SP |
246 | int ret; |
247 | ||
248 | if (!Nflag && (ret = link(existing, new)) < 0) { | |
249 | ||
250 | #ifndef __linux__ | |
251 | struct stat s; | |
252 | ||
253 | /* | |
254 | * Most likely, the schg flag is set. Clear the | |
255 | * flags and try again. | |
256 | */ | |
257 | if (stat(existing, &s) == 0 && s.st_flags != 0 && | |
258 | chflags(existing, 0) == 0) { | |
259 | ret = link(existing, new); | |
260 | chflags(existing, s.st_flags); | |
261 | } | |
262 | #endif | |
263 | if (ret < 0) { | |
264 | fprintf(stderr, "warning: cannot create " | |
265 | "hard link %s->%s: %s\n", | |
266 | new, existing, strerror(errno)); | |
267 | return (FAIL); | |
268 | } | |
1227625a SP |
269 | } |
270 | } else { | |
271 | panic("linkit: unknown type %d\n", type); | |
272 | return (FAIL); | |
273 | } | |
274 | vprintf(stdout, "Create %s link %s->%s\n", | |
275 | type == SYMLINK ? "symbolic" : "hard", new, existing); | |
276 | return (GOOD); | |
277 | } | |
278 | ||
279 | #ifndef __linux__ | |
280 | /* | |
b45f51d6 | 281 | * Create a whiteout. |
1227625a SP |
282 | */ |
283 | int | |
284 | addwhiteout(name) | |
285 | char *name; | |
286 | { | |
287 | ||
288 | if (!Nflag && mknod(name, S_IFWHT, 0) < 0) { | |
289 | fprintf(stderr, "warning: cannot create whiteout %s: %s\n", | |
290 | name, strerror(errno)); | |
291 | return (FAIL); | |
292 | } | |
293 | vprintf(stdout, "Create whiteout %s\n", name); | |
294 | return (GOOD); | |
295 | } | |
296 | ||
297 | /* | |
298 | * Delete a whiteout. | |
299 | */ | |
300 | void | |
301 | delwhiteout(ep) | |
302 | register struct entry *ep; | |
303 | { | |
304 | char *name; | |
305 | ||
306 | if (ep->e_type != LEAF) | |
307 | badentry(ep, "delwhiteout: not a leaf"); | |
308 | ep->e_flags |= REMOVED; | |
309 | ep->e_flags &= ~TMPNAME; | |
310 | name = myname(ep); | |
311 | if (!Nflag && undelete(name) < 0) { | |
312 | fprintf(stderr, "warning: cannot delete whiteout %s: %s\n", | |
313 | name, strerror(errno)); | |
314 | return; | |
315 | } | |
316 | vprintf(stdout, "Delete whiteout %s\n", name); | |
317 | } | |
318 | #endif | |
319 | ||
320 | /* | |
321 | * find lowest number file (above "start") that needs to be extracted | |
322 | */ | |
323 | ino_t | |
324 | lowerbnd(start) | |
325 | ino_t start; | |
326 | { | |
327 | register struct entry *ep; | |
328 | ||
329 | for ( ; start < maxino; start++) { | |
330 | ep = lookupino(start); | |
331 | if (ep == NULL || ep->e_type == NODE) | |
332 | continue; | |
333 | if (ep->e_flags & (NEW|EXTRACT)) | |
334 | return (start); | |
335 | } | |
336 | return (start); | |
337 | } | |
338 | ||
339 | /* | |
340 | * find highest number file (below "start") that needs to be extracted | |
341 | */ | |
342 | ino_t | |
343 | upperbnd(start) | |
344 | ino_t start; | |
345 | { | |
346 | register struct entry *ep; | |
347 | ||
348 | for ( ; start > ROOTINO; start--) { | |
349 | ep = lookupino(start); | |
350 | if (ep == NULL || ep->e_type == NODE) | |
351 | continue; | |
352 | if (ep->e_flags & (NEW|EXTRACT)) | |
353 | return (start); | |
354 | } | |
355 | return (start); | |
356 | } | |
357 | ||
358 | /* | |
359 | * report on a badly formed entry | |
360 | */ | |
361 | void | |
362 | badentry(ep, msg) | |
363 | register struct entry *ep; | |
364 | char *msg; | |
365 | { | |
366 | ||
367 | fprintf(stderr, "bad entry: %s\n", msg); | |
368 | fprintf(stderr, "name: %s\n", myname(ep)); | |
369 | fprintf(stderr, "parent name %s\n", myname(ep->e_parent)); | |
370 | if (ep->e_sibling != NULL) | |
371 | fprintf(stderr, "sibling name: %s\n", myname(ep->e_sibling)); | |
372 | if (ep->e_entries != NULL) | |
373 | fprintf(stderr, "next entry name: %s\n", myname(ep->e_entries)); | |
374 | if (ep->e_links != NULL) | |
375 | fprintf(stderr, "next link name: %s\n", myname(ep->e_links)); | |
376 | if (ep->e_next != NULL) | |
377 | fprintf(stderr, | |
378 | "next hashchain name: %s\n", myname(ep->e_next)); | |
379 | fprintf(stderr, "entry type: %s\n", | |
380 | ep->e_type == NODE ? "NODE" : "LEAF"); | |
b45f51d6 | 381 | fprintf(stderr, "inode number: %lu\n", (u_long)ep->e_ino); |
1227625a SP |
382 | panic("flags: %s\n", flagvalues(ep)); |
383 | } | |
384 | ||
385 | /* | |
386 | * Construct a string indicating the active flag bits of an entry. | |
387 | */ | |
388 | char * | |
389 | flagvalues(ep) | |
390 | register struct entry *ep; | |
391 | { | |
392 | static char flagbuf[BUFSIZ]; | |
393 | ||
394 | (void) strcpy(flagbuf, "|NIL"); | |
395 | flagbuf[0] = '\0'; | |
396 | if (ep->e_flags & REMOVED) | |
397 | (void) strcat(flagbuf, "|REMOVED"); | |
398 | if (ep->e_flags & TMPNAME) | |
399 | (void) strcat(flagbuf, "|TMPNAME"); | |
400 | if (ep->e_flags & EXTRACT) | |
401 | (void) strcat(flagbuf, "|EXTRACT"); | |
402 | if (ep->e_flags & NEW) | |
403 | (void) strcat(flagbuf, "|NEW"); | |
404 | if (ep->e_flags & KEEP) | |
405 | (void) strcat(flagbuf, "|KEEP"); | |
406 | if (ep->e_flags & EXISTED) | |
407 | (void) strcat(flagbuf, "|EXISTED"); | |
408 | return (&flagbuf[1]); | |
409 | } | |
410 | ||
411 | /* | |
412 | * Check to see if a name is on a dump tape. | |
413 | */ | |
414 | ino_t | |
415 | dirlookup(name) | |
416 | const char *name; | |
417 | { | |
418 | struct direct *dp; | |
419 | ino_t ino; | |
b45f51d6 | 420 | |
1227625a SP |
421 | ino = ((dp = pathsearch(name)) == NULL) ? 0 : dp->d_ino; |
422 | ||
423 | if (ino == 0 || TSTINO(ino, dumpmap) == 0) | |
424 | fprintf(stderr, "%s is not on the tape\n", name); | |
425 | return (ino); | |
426 | } | |
427 | ||
428 | /* | |
429 | * Elicit a reply. | |
430 | */ | |
431 | int | |
432 | reply(question) | |
433 | char *question; | |
434 | { | |
435 | char c; | |
436 | ||
437 | do { | |
438 | fprintf(stderr, "%s? [yn] ", question); | |
439 | (void) fflush(stderr); | |
440 | c = getc(terminal); | |
441 | while (c != '\n' && getc(terminal) != '\n') | |
442 | if (feof(terminal)) | |
443 | return (FAIL); | |
444 | } while (c != 'y' && c != 'n'); | |
445 | if (c == 'y') | |
446 | return (GOOD); | |
447 | return (FAIL); | |
448 | } | |
449 | ||
450 | /* | |
451 | * handle unexpected inconsistencies | |
452 | */ | |
453 | #if __STDC__ | |
454 | #include <stdarg.h> | |
455 | #else | |
456 | #include <varargs.h> | |
457 | #endif | |
458 | ||
459 | void | |
460 | #if __STDC__ | |
461 | panic(const char *fmt, ...) | |
462 | #else | |
463 | panic(fmt, va_alist) | |
464 | char *fmt; | |
465 | va_dcl | |
466 | #endif | |
467 | { | |
468 | va_list ap; | |
469 | #if __STDC__ | |
470 | va_start(ap, fmt); | |
471 | #else | |
472 | va_start(ap); | |
473 | #endif | |
474 | ||
475 | vfprintf(stderr, fmt, ap); | |
476 | if (yflag) | |
477 | return; | |
478 | if (reply("abort") == GOOD) { | |
479 | if (reply("dump core") == GOOD) | |
480 | abort(); | |
481 | done(1); | |
482 | } | |
483 | } |