2 * Ported to Linux's Second Extended File System as part of the
3 * dump and restore backup suit
4 * Remy Card <card@Linux.EU.Org>, 1994-1997
5 * Stelian Pop <stelian@popies.net>, 1999-2000
6 * Stelian Pop <stelian@popies.net> - AlcĂ´ve <www.alcove.com>, 2000-2002
10 * Copyright (c) 1983, 1993
11 * The Regents of the University of California. All rights reserved.
13 * Redistribution and use in source and binary forms, with or without
14 * modification, are permitted provided that the following conditions
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. Neither the name of the University nor the names of its contributors
22 * may be used to endorse or promote products derived from this software
23 * without specific prior written permission.
25 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
27 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
28 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
30 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
31 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
33 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
34 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
39 static const char rcsid[] =
40 "$Id: utilities.c,v 1.22 2003/03/30 15:40:40 stelian Exp $";
45 #include <compaterr.h>
50 #include <sys/param.h>
56 #ifdef HAVE_EXT2FS_EXT2_FS_H
57 #include <ext2fs/ext2_fs.h>
59 #include <linux/ext2_fs.h>
61 #include <ext2fs/ext2fs.h>
62 #include <bsdcompat.h>
64 #include <ufs/ufs/dinode.h>
65 #include <ufs/ufs/dir.h>
66 #endif /* __linux__ */
72 * Insure that all the components of a pathname exist.
81 start = strchr(name, '/');
84 for (cp = start; *cp != '\0'; cp++) {
88 ep = lookupname(name);
90 /* Safe; we know the pathname exists in the dump. */
91 ep = addentry(name, pathsearch(name)->d_ino, NODE);
94 ep->e_flags |= NEW|KEEP;
100 * Change a name to a unique temporary name.
103 mktempname(struct entry *ep)
105 char oldname[MAXPATHLEN];
107 if (ep->e_flags & TMPNAME)
108 badentry(ep, "mktempname: called with TMPNAME");
109 ep->e_flags |= TMPNAME;
110 (void) strcpy(oldname, myname(ep));
111 freename(ep->e_name);
112 ep->e_name = savename(gentempname(ep));
113 ep->e_namlen = strlen(ep->e_name);
114 renameit(oldname, myname(ep));
118 * Generate a temporary name for an entry.
121 gentempname(struct entry *ep)
123 static char name[MAXPATHLEN];
127 for (np = lookupino(ep->e_ino);
128 np != NULL && np != ep; np = np->e_links)
131 badentry(ep, "not on ino list");
132 (void) snprintf(name, sizeof(name), "%s%ld%lu", TMPHDR, i, (unsigned long)ep->e_ino);
137 * Rename a file or directory.
140 renameit(char *from, char *to)
142 if (!Nflag && rename(from, to) < 0) {
143 warn("cannot rename %s to %s", from, to);
146 Vprintf(stdout, "rename %s to %s\n", from, to);
150 * Create a new node (directory).
153 newnode(struct entry *np)
156 if (np->e_type != NODE)
157 badentry(np, "newnode: not a node");
159 if (command == 'C') return;
161 if (!Nflag && mkdir(cp, 0777) < 0 && !uflag) {
162 np->e_flags |= EXISTED;
166 Vprintf(stdout, "Make node %s\n", cp);
170 * Remove an old node (directory).
173 removenode(struct entry *ep)
177 if (ep->e_type != NODE)
178 badentry(ep, "removenode: not a node");
179 if (ep->e_entries != NULL)
180 badentry(ep, "removenode: non-empty directory");
181 ep->e_flags |= REMOVED;
182 ep->e_flags &= ~TMPNAME;
184 if (!Nflag && rmdir(cp) < 0) {
188 Vprintf(stdout, "Remove node %s\n", cp);
195 removeleaf(struct entry *ep)
199 if (command == 'C') return;
201 if (ep->e_type != LEAF)
202 badentry(ep, "removeleaf: not a leaf");
203 ep->e_flags |= REMOVED;
204 ep->e_flags &= ~TMPNAME;
206 if (!Nflag && unlink(cp) < 0) {
210 Vprintf(stdout, "Remove leaf %s\n", cp);
217 linkit(char *existing, char *new, int type)
220 /* if we want to unlink first, do it now so *link() won't fail */
224 if (type == SYMLINK) {
225 if (!Nflag && symlink(existing, new) < 0) {
226 warn("cannot create symbolic link %s->%s",
230 } else if (type == HARDLINK) {
233 if (!Nflag && (ret = link(existing, new)) < 0) {
235 #if !defined(__linux__) && !defined(sunos)
239 * Most likely, the schg flag is set. Clear the
240 * flags and try again.
242 if (stat(existing, &s) == 0 && s.st_flags != 0 &&
243 chflags(existing, 0) == 0) {
244 ret = link(existing, new);
245 chflags(existing, s.st_flags);
251 * Most likely, the immutable or append-only attribute
252 * is set. Clear the attributes and try again.
254 if (fgetflags (existing, &s) != -1 &&
255 fsetflags (existing, 0) != -1) {
256 ret = link(existing, new);
257 fsetflags(existing, s);
261 warn("warning: cannot create hard link %s->%s",
267 panic("linkit: unknown type %d\n", type);
270 Vprintf(stdout, "Create %s link %s->%s\n",
271 type == SYMLINK ? "symbolic" : "hard", new, existing);
275 #if !defined(__linux__) && !defined(sunos)
280 addwhiteout(char *name)
283 if (!Nflag && mknod(name, S_IFWHT, 0) < 0) {
284 warn("cannot create whiteout %s", name);
287 Vprintf(stdout, "Create whiteout %s\n", name);
295 delwhiteout(struct entry *ep)
299 if (ep->e_type != LEAF)
300 badentry(ep, "delwhiteout: not a leaf");
301 ep->e_flags |= REMOVED;
302 ep->e_flags &= ~TMPNAME;
304 if (!Nflag && undelete(name) < 0) {
305 warn("cannot delete whiteout %s", name);
308 Vprintf(stdout, "Delete whiteout %s\n", name);
313 * find lowest number file (above "start") that needs to be extracted
316 lowerbnd(dump_ino_t start)
320 for ( ; start < maxino; start++) {
321 ep = lookupino(start);
322 if (ep == NULL || ep->e_type == NODE)
324 if (ep->e_flags & (NEW|EXTRACT))
331 * find highest number file (below "start") that needs to be extracted
334 upperbnd(dump_ino_t start)
338 for ( ; start > ROOTINO; start--) {
339 ep = lookupino(start);
340 if (ep == NULL || ep->e_type == NODE)
342 if (ep->e_flags & (NEW|EXTRACT))
349 * report on a badly formed entry
352 badentry(struct entry *ep, const char *msg)
355 fprintf(stderr, "bad entry: %s\n", msg);
356 fprintf(stderr, "name: %s\n", myname(ep));
357 fprintf(stderr, "parent name %s\n", myname(ep->e_parent));
358 if (ep->e_sibling != NULL)
359 fprintf(stderr, "sibling name: %s\n", myname(ep->e_sibling));
360 if (ep->e_entries != NULL)
361 fprintf(stderr, "next entry name: %s\n", myname(ep->e_entries));
362 if (ep->e_links != NULL)
363 fprintf(stderr, "next link name: %s\n", myname(ep->e_links));
364 if (ep->e_next != NULL)
366 "next hashchain name: %s\n", myname(ep->e_next));
367 fprintf(stderr, "entry type: %s\n",
368 ep->e_type == NODE ? "NODE" : "LEAF");
369 fprintf(stderr, "inode number: %lu\n", (unsigned long)ep->e_ino);
370 panic("flags: %s\n", flagvalues(ep));
374 * Construct a string indicating the active flag bits of an entry.
377 flagvalues(struct entry *ep)
379 static char flagbuf[BUFSIZ];
381 (void) strcpy(flagbuf, "|NIL");
383 if (ep->e_flags & REMOVED)
384 (void) strcat(flagbuf, "|REMOVED");
385 if (ep->e_flags & TMPNAME)
386 (void) strcat(flagbuf, "|TMPNAME");
387 if (ep->e_flags & EXTRACT)
388 (void) strcat(flagbuf, "|EXTRACT");
389 if (ep->e_flags & NEW)
390 (void) strcat(flagbuf, "|NEW");
391 if (ep->e_flags & KEEP)
392 (void) strcat(flagbuf, "|KEEP");
393 if (ep->e_flags & EXISTED)
394 (void) strcat(flagbuf, "|EXISTED");
395 return (&flagbuf[1]);
399 * Check to see if a name is on a dump tape.
402 dirlookup(const char *name)
407 ino = ((dp = pathsearch(name)) == NULL) ? 0 : dp->d_ino;
409 if (ino == 0 || TSTINO(ino, dumpmap) == 0)
410 fprintf(stderr, "%s is not on the tape\n", name);
418 reply(const char *question)
423 fprintf(stderr, "%s? [yn] ", question);
424 (void) fflush(stderr);
426 while (c != '\n' && getc(terminal) != '\n')
429 } while (c != 'y' && c != 'n');
436 * handle unexpected inconsistencies
446 panic(const char *fmt, ...)
460 vfprintf(stderr, fmt, ap);
463 if (reply("abort") == GOOD) {
464 if (reply("dump core") == GOOD)
472 * search for ino in QFA file
475 * if ino found return tape number and tape position
476 * if ino not found return tnum=0 and tpos=0
479 * if ino found return tape number and tape position
480 * if ino not found return tape number and tape position of last smaller ino
481 * if no smaller inode found return tnum=0 and tpos=0
484 Inode2Tapepos(dump_ino_t ino, long *tnum, long long *tpos, int exactmatch)
488 unsigned long tmpino;
494 if (fseek(gTapeposfp, gSeekstart, SEEK_SET) == -1)
496 while (fgets(gTps, sizeof(gTps), gTapeposfp) != NULL) {
497 gTps[strlen(gTps) - 1] = 0; /* delete end of line */
499 bzero(numbuff, sizeof(numbuff));
502 while ((*p != 0) && (*p != '\t'))
504 tmpino = atol(numbuff);
506 return 1; /* may NOT happen */
508 bzero(numbuff, sizeof(numbuff));
511 while ((*p != 0) && (*p != '\t'))
514 return 1; /* may NOT happen */
515 tmptnum = atol(numbuff);
517 bzero(numbuff, sizeof(numbuff));
520 while ((*p != 0) && (*p != '\t'))
522 tmptpos = atoll(numbuff);
543 void resizemaps(dump_ino_t oldmax, dump_ino_t newmax)
548 map = calloc((unsigned)1, (unsigned)howmany(newmax, NBBY));
550 errx(1, "no memory for active inode map");
551 memcpy(map, usedinomap, howmany(oldmax, NBBY));
556 map = calloc((unsigned)1, (unsigned)howmany(newmax, NBBY));
558 errx(1, "no memory for file dump list");
559 memcpy(map, dumpmap, howmany(oldmax, NBBY));