]>
git.wh0rd.org - dump.git/blob - restore/utilities.c
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 <pop@cybercable.fr>, 1999-2000
9 * Copyright (c) 1983, 1993
10 * The Regents of the University of California. All rights reserved.
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
15 * 1. Redistributions of source code must retain the above copyright
16 * notice, this list of conditions and the following disclaimer.
17 * 2. Redistributions in binary form must reproduce the above copyright
18 * notice, this list of conditions and the following disclaimer in the
19 * documentation and/or other materials provided with the distribution.
20 * 3. All advertising materials mentioning features or use of this software
21 * must display the following acknowledgement:
22 * This product includes software developed by the University of
23 * California, Berkeley and its contributors.
24 * 4. Neither the name of the University nor the names of its contributors
25 * may be used to endorse or promote products derived from this software
26 * without specific prior written permission.
28 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
29 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
30 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
31 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
32 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
33 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
34 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
35 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
36 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
37 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
42 static const char rcsid
[] =
43 "$Id: utilities.c,v 1.7 2000/01/21 10:17:41 stelian Exp $";
46 #include <sys/param.h>
51 #include <linux/ext2_fs.h>
52 #include <bsdcompat.h>
54 #include <ufs/ufs/dinode.h>
55 #include <ufs/ufs/dir.h>
56 #endif /* __linux__ */
59 #include <compaterr.h>
65 #include <ext2fs/ext2fs.h>
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) {
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
);
249 warn("warning: cannot create hard link %s->%s",
255 panic("linkit: unknown type %d\n", type
);
258 Vprintf(stdout
, "Create %s link %s->%s\n",
259 type
== SYMLINK
? "symbolic" : "hard", new, existing
);
268 addwhiteout(char *name
)
271 if (!Nflag
&& mknod(name
, S_IFWHT
, 0) < 0) {
272 warn("cannot create whiteout %s", name
);
275 Vprintf(stdout
, "Create whiteout %s\n", name
);
283 delwhiteout(struct entry
*ep
)
287 if (ep
->e_type
!= LEAF
)
288 badentry(ep
, "delwhiteout: not a leaf");
289 ep
->e_flags
|= REMOVED
;
290 ep
->e_flags
&= ~TMPNAME
;
292 if (!Nflag
&& undelete(name
) < 0) {
293 warn("cannot delete whiteout %s", name
);
296 Vprintf(stdout
, "Delete whiteout %s\n", name
);
301 * find lowest number file (above "start") that needs to be extracted
304 lowerbnd(ino_t start
)
306 register struct entry
*ep
;
308 for ( ; start
< maxino
; start
++) {
309 ep
= lookupino(start
);
310 if (ep
== NULL
|| ep
->e_type
== NODE
)
312 if (ep
->e_flags
& (NEW
|EXTRACT
))
319 * find highest number file (below "start") that needs to be extracted
322 upperbnd(ino_t start
)
324 register struct entry
*ep
;
326 for ( ; start
> ROOTINO
; start
--) {
327 ep
= lookupino(start
);
328 if (ep
== NULL
|| ep
->e_type
== NODE
)
330 if (ep
->e_flags
& (NEW
|EXTRACT
))
337 * report on a badly formed entry
340 badentry(struct entry
*ep
, const char *msg
)
343 fprintf(stderr
, "bad entry: %s\n", msg
);
344 fprintf(stderr
, "name: %s\n", myname(ep
));
345 fprintf(stderr
, "parent name %s\n", myname(ep
->e_parent
));
346 if (ep
->e_sibling
!= NULL
)
347 fprintf(stderr
, "sibling name: %s\n", myname(ep
->e_sibling
));
348 if (ep
->e_entries
!= NULL
)
349 fprintf(stderr
, "next entry name: %s\n", myname(ep
->e_entries
));
350 if (ep
->e_links
!= NULL
)
351 fprintf(stderr
, "next link name: %s\n", myname(ep
->e_links
));
352 if (ep
->e_next
!= NULL
)
354 "next hashchain name: %s\n", myname(ep
->e_next
));
355 fprintf(stderr
, "entry type: %s\n",
356 ep
->e_type
== NODE
? "NODE" : "LEAF");
357 fprintf(stderr
, "inode number: %lu\n", (unsigned long)ep
->e_ino
);
358 panic("flags: %s\n", flagvalues(ep
));
362 * Construct a string indicating the active flag bits of an entry.
365 flagvalues(struct entry
*ep
)
367 static char flagbuf
[BUFSIZ
];
369 (void) strcpy(flagbuf
, "|NIL");
371 if (ep
->e_flags
& REMOVED
)
372 (void) strcat(flagbuf
, "|REMOVED");
373 if (ep
->e_flags
& TMPNAME
)
374 (void) strcat(flagbuf
, "|TMPNAME");
375 if (ep
->e_flags
& EXTRACT
)
376 (void) strcat(flagbuf
, "|EXTRACT");
377 if (ep
->e_flags
& NEW
)
378 (void) strcat(flagbuf
, "|NEW");
379 if (ep
->e_flags
& KEEP
)
380 (void) strcat(flagbuf
, "|KEEP");
381 if (ep
->e_flags
& EXISTED
)
382 (void) strcat(flagbuf
, "|EXISTED");
383 return (&flagbuf
[1]);
387 * Check to see if a name is on a dump tape.
390 dirlookup(const char *name
)
395 ino
= ((dp
= pathsearch(name
)) == NULL
) ? 0 : dp
->d_ino
;
397 if (ino
== 0 || TSTINO(ino
, dumpmap
) == 0)
398 fprintf(stderr
, "%s is not on the tape\n", name
);
406 reply(const char *question
)
411 fprintf(stderr
, "%s? [yn] ", question
);
412 (void) fflush(stderr
);
414 while (c
!= '\n' && getc(terminal
) != '\n')
417 } while (c
!= 'y' && c
!= 'n');
424 * handle unexpected inconsistencies
434 panic(const char *fmt
, ...)
448 vfprintf(stderr
, fmt
, ap
);
451 if (reply("abort") == GOOD
) {
452 if (reply("dump core") == GOOD
)