]>
git.wh0rd.org - dump.git/blob - restore/dirs.c
30cec66e4a88a0df239ac1eb2ad38b0fd3a22591
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
10 * Copyright (c) 1983, 1993
11 * The Regents of the University of California. All rights reserved.
12 * (c) UNIX System Laboratories, Inc.
13 * All or some portions of this file are derived from material licensed
14 * to the University of California by American Telephone and Telegraph
15 * Co. or Unix System Laboratories, Inc. and are reproduced herein with
16 * the permission of UNIX System Laboratories, Inc.
18 * Redistribution and use in source and binary forms, with or without
19 * modification, are permitted provided that the following conditions
21 * 1. Redistributions of source code must retain the above copyright
22 * notice, this list of conditions and the following disclaimer.
23 * 2. Redistributions in binary form must reproduce the above copyright
24 * notice, this list of conditions and the following disclaimer in the
25 * documentation and/or other materials provided with the distribution.
26 * 3. All advertising materials mentioning features or use of this software
27 * must display the following acknowledgement:
28 * This product includes software developed by the University of
29 * California, Berkeley and its contributors.
30 * 4. Neither the name of the University nor the names of its contributors
31 * may be used to endorse or promote products derived from this software
32 * without specific prior written permission.
34 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
35 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
36 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
37 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
38 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
39 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
40 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
41 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
42 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
43 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
49 static char sccsid
[] = "@(#)dirs.c 8.7 (Berkeley) 5/1/95";
51 static const char rcsid
[] =
52 "$Id: dirs.c,v 1.3 1999/10/11 12:59:19 stelian Exp $";
55 #include <sys/param.h>
60 #include <linux/ext2_fs.h>
61 #include <bsdcompat.h>
63 #include <ufs/ufs/dinode.h>
64 #include <ufs/ufs/dir.h>
65 #endif /* __linux__ */
66 #include <protocols/dumprestore.h>
68 #include <compaterr.h>
78 #include <machine/endian.h>
81 #include "pathnames.h"
86 * Symbol table of directories read from tape.
89 #define INOHASH(val) (val % HASHSIZE)
91 struct inotab
*t_next
;
96 static struct inotab
*inotab
[HASHSIZE
];
99 * Information retained about directories.
103 struct timeval timep
[2];
111 * Definitions for library routines operating on directories.
114 #define DIRBLKSIZ 1024
119 char dd_buf
[DIRBLKSIZ
];
123 * Global variables for this file.
126 static FILE *df
, *mf
;
127 static RST_DIR
*dirp
;
128 static char dirfile
[MAXPATHLEN
] = "#"; /* No file */
129 static char modefile
[MAXPATHLEN
] = "#"; /* No file */
130 static char dot
[2] = "."; /* So it can be modified */
133 * Format of old style directories.
138 char d_name
[ODIRSIZ
];
142 static struct inotab
*allocinotab
__P((ino_t
, struct new_bsd_inode
*, long));
144 static struct inotab
*allocinotab
__P((ino_t
, struct dinode
*, long));
146 static void dcvt
__P((struct odirect
*, struct direct
*));
147 static void flushent
__P((void));
148 static struct inotab
*inotablookup
__P((ino_t
));
149 static RST_DIR
*opendirfile
__P((const char *));
150 static void putdir
__P((char *, size_t));
151 static void putent
__P((struct direct
*));
152 static void rst_seekdir
__P((RST_DIR
*, long, long));
153 static long rst_telldir
__P((RST_DIR
*));
154 static struct direct
*searchdir
__P((ino_t
, char *));
157 * Extract directory contents, building up a directory structure
158 * on disk for extraction by name.
159 * If genmode is requested, save mode, owner, and times for all
160 * directories on the tape.
163 extractdirs(int genmode
)
167 register struct new_bsd_inode
*ip
;
169 register struct dinode
*ip
;
172 struct direct nulldir
;
175 Vprintf(stdout
, "Extract directories from tape\n");
176 (void) snprintf(dirfile
, sizeof(dirfile
), "%s/rstdir%ld", tmpdir
,
178 if (command
!= 'r' && command
!= 'R') {
179 (void) strncat(dirfile
, "-XXXXXX",
180 sizeof(dirfile
) - strlen(dirfile
));
181 fd
= mkstemp(dirfile
);
183 fd
= open(dirfile
, O_RDWR
|O_CREAT
|O_EXCL
, 0666);
184 if (fd
== -1 || (df
= fdopen(fd
, "w")) == NULL
) {
187 err(1, "cannot create directory temporary %s", dirfile
);
190 (void) snprintf(modefile
, sizeof(modefile
), "%s/rstmode%ld", tmpdir
, (long)dumpdate
);
191 if (command
!= 'r' && command
!= 'R') {
192 (void) strncat(modefile
, "-XXXXXX",
193 sizeof(modefile
) - strlen(modefile
));
194 fd
= mkstemp(modefile
);
196 fd
= open(modefile
, O_RDWR
|O_CREAT
|O_EXCL
, 0666);
197 if (fd
== -1 || (mf
= fdopen(fd
, "w")) == NULL
) {
200 err(1, "cannot create modefile %s", modefile
);
204 nulldir
.d_type
= DT_DIR
;
205 nulldir
.d_namlen
= 1;
206 nulldir
.d_name
[0] = '/';
207 nulldir
.d_name
[1] = '\0';
208 nulldir
.d_reclen
= DIRSIZ(0, &nulldir
);
210 curfile
.name
= "<directory file - name unknown>";
211 curfile
.action
= USING
;
213 if (ip
== NULL
|| (ip
->di_mode
& IFMT
) != IFDIR
) {
215 dirp
= opendirfile(dirfile
);
222 panic("Root directory is not on tape\n");
225 itp
= allocinotab(curfile
.ino
, ip
, seekpt
);
226 getfile(putdir
, xtrnull
);
229 itp
->t_size
= seekpt
- itp
->t_seekpt
;
234 * skip over all the directories on the tape
240 while (curfile
.dip
&& (curfile
.dip
->di_mode
& IFMT
) == IFDIR
) {
246 * Recursively find names and inumbers of all files in subtree
247 * pname and pass them off to be processed.
250 treescan(char *pname
, ino_t ino
, long (*todo
) __P((char *, ino_t
, int)))
252 register struct inotab
*itp
;
253 register struct direct
*dp
;
256 char locname
[MAXPATHLEN
+ 1];
258 itp
= inotablookup(ino
);
261 * Pname is name of a simple file or an unchanged directory.
263 (void) (*todo
)(pname
, ino
, LEAF
);
267 * Pname is a dumped directory name.
269 if ((*todo
)(pname
, ino
, NODE
) == FAIL
)
272 * begin search through the directory
273 * skipping over "." and ".."
275 namelen
= snprintf(locname
, sizeof(locname
), "%s/", pname
);
276 if (namelen
>= sizeof(locname
))
277 namelen
= sizeof(locname
) - 1;
278 rst_seekdir(dirp
, itp
->t_seekpt
, itp
->t_seekpt
);
279 dp
= rst_readdir(dirp
); /* "." */
280 if (dp
!= NULL
&& strcmp(dp
->d_name
, ".") == 0)
281 dp
= rst_readdir(dirp
); /* ".." */
283 fprintf(stderr
, "Warning: `.' missing from directory %s\n",
285 if (dp
!= NULL
&& strcmp(dp
->d_name
, "..") == 0)
286 dp
= rst_readdir(dirp
); /* first real entry */
288 fprintf(stderr
, "Warning: `..' missing from directory %s\n",
290 bpt
= rst_telldir(dirp
);
292 * a zero inode signals end of directory
295 locname
[namelen
] = '\0';
296 if (namelen
+ dp
->d_namlen
>= sizeof(locname
)) {
297 fprintf(stderr
, "%s%s: name exceeds %ld char\n",
298 locname
, dp
->d_name
, (long)sizeof(locname
) - 1);
300 (void) strncat(locname
, dp
->d_name
, (int)dp
->d_namlen
);
301 treescan(locname
, dp
->d_ino
, todo
);
302 rst_seekdir(dirp
, bpt
, itp
->t_seekpt
);
304 dp
= rst_readdir(dirp
);
305 bpt
= rst_telldir(dirp
);
310 * Lookup a pathname which is always assumed to start from the ROOTINO.
313 pathsearch(const char *pathname
)
317 char *path
, *name
, buffer
[MAXPATHLEN
];
319 strcpy(buffer
, pathname
);
325 while ((name
= strsep(&path
, "/")) != NULL
&& *name
/* != NULL */) {
326 if ((dp
= searchdir(ino
, name
)) == NULL
)
334 * Lookup the requested name in directory inum.
335 * Return its inode number if found, zero if it does not exist.
337 static struct direct
*
338 searchdir(ino_t inum
, char *name
)
340 register struct direct
*dp
;
341 register struct inotab
*itp
;
344 itp
= inotablookup(inum
);
347 rst_seekdir(dirp
, itp
->t_seekpt
, itp
->t_seekpt
);
350 dp
= rst_readdir(dirp
);
353 } while (dp
->d_namlen
!= len
|| strncmp(dp
->d_name
, name
, len
) != 0);
358 * Put the directory entries in the directory file
361 putdir(char *buf
, size_t size
)
363 struct direct cvtbuf
;
364 register struct odirect
*odp
;
365 struct odirect
*eodp
;
366 register struct direct
*dp
;
370 eodp
= (struct odirect
*)&buf
[size
];
371 for (odp
= (struct odirect
*)buf
; odp
< eodp
; odp
++)
372 if (odp
->d_ino
!= 0) {
377 for (loc
= 0; loc
< size
; ) {
378 dp
= (struct direct
*)(buf
+ loc
);
380 printf ("reclen = %d, namlen = %d, type = %d\n",
381 dp
->d_reclen
, dp
->d_namlen
, dp
->d_type
);
384 swabst((u_char
*)"is", (u_char
*) dp
);
385 if (oldinofmt
&& dp
->d_ino
!= 0) {
388 swabst((u_char
*)"s", (u_char
*)&dp
->d_namlen
);
390 # if BYTE_ORDER == BIG_ENDIAN
392 dp
->d_namlen
= dp
->d_type
;
395 dp
->d_namlen
= dp
->d_type
;
397 #endif /* __linux__ */
398 dp
->d_type
= DT_UNKNOWN
;
402 * Horrible hack to read FreeBSD 2.0 dumps
405 swabst((u_char
*)"6bs", (u_char
*) dp
);
406 #endif /* __linux__ */
408 printf ("reclen = %d, namlen = %d, type = %d\n",
409 dp
->d_reclen
, dp
->d_namlen
, dp
->d_type
);
411 i
= DIRBLKSIZ
- (loc
& (DIRBLKSIZ
- 1));
412 if ((dp
->d_reclen
& 0x3) != 0 ||
414 dp
->d_reclen
< DIRSIZ(0, dp
) ||
415 dp
->d_namlen
> NAME_MAX
) {
416 Vprintf(stdout
, "Mangled directory: ");
417 if ((dp
->d_reclen
& 0x3) != 0)
419 "reclen not multiple of 4 ");
420 if (dp
->d_reclen
< DIRSIZ(0, dp
))
422 "reclen less than DIRSIZ (%d < %d) ",
423 dp
->d_reclen
, DIRSIZ(0, dp
));
424 if (dp
->d_namlen
> NAME_MAX
)
426 "reclen name too big (%d > %d) ",
427 dp
->d_namlen
, NAME_MAX
);
428 Vprintf(stdout
, "\n");
433 if (dp
->d_ino
!= 0) {
441 * These variables are "local" to the following two functions.
443 char dirbuf
[DIRBLKSIZ
];
448 * add a new directory entry to a file.
451 putent(struct direct
*dp
)
453 dp
->d_reclen
= DIRSIZ(0, dp
);
454 if (dirloc
+ dp
->d_reclen
> DIRBLKSIZ
) {
455 ((struct direct
*)(dirbuf
+ prev
))->d_reclen
=
457 (void) fwrite(dirbuf
, 1, DIRBLKSIZ
, df
);
460 memmove(dirbuf
+ dirloc
, dp
, (size_t)dp
->d_reclen
);
462 dirloc
+= dp
->d_reclen
;
466 * flush out a directory that is finished.
471 ((struct direct
*)(dirbuf
+ prev
))->d_reclen
= DIRBLKSIZ
- prev
;
472 (void) fwrite(dirbuf
, (int)dirloc
, 1, df
);
478 dcvt(struct odirect
*odp
, struct direct
*ndp
)
481 memset(ndp
, 0, (size_t)(sizeof *ndp
));
482 ndp
->d_ino
= odp
->d_ino
;
483 ndp
->d_type
= DT_UNKNOWN
;
484 (void) strncpy(ndp
->d_name
, odp
->d_name
, ODIRSIZ
);
485 ndp
->d_namlen
= strlen(ndp
->d_name
);
486 ndp
->d_reclen
= DIRSIZ(0, ndp
);
490 * Seek to an entry in a directory.
491 * Only values returned by rst_telldir should be passed to rst_seekdir.
492 * This routine handles many directories in a single file.
493 * It takes the base of the directory in the file, plus
494 * the desired seek offset into it.
497 rst_seekdir(RST_DIR
*dirp
, long loc
, long base
)
500 if (loc
== rst_telldir(dirp
))
504 fprintf(stderr
, "bad seek pointer to rst_seekdir %ld\n", loc
);
505 (void) lseek(dirp
->dd_fd
, base
+ (loc
& ~(DIRBLKSIZ
- 1)), SEEK_SET
);
506 dirp
->dd_loc
= loc
& (DIRBLKSIZ
- 1);
507 if (dirp
->dd_loc
!= 0)
508 dirp
->dd_size
= read(dirp
->dd_fd
, dirp
->dd_buf
, DIRBLKSIZ
);
512 * get next entry in a directory.
515 rst_readdir(RST_DIR
*dirp
)
517 register struct direct
*dp
;
520 if (dirp
->dd_loc
== 0) {
521 dirp
->dd_size
= read(dirp
->dd_fd
, dirp
->dd_buf
,
523 if (dirp
->dd_size
<= 0) {
524 Dprintf(stderr
, "error reading directory\n");
528 if (dirp
->dd_loc
>= dirp
->dd_size
) {
532 dp
= (struct direct
*)(dirp
->dd_buf
+ dirp
->dd_loc
);
533 if (dp
->d_reclen
== 0 ||
534 dp
->d_reclen
> DIRBLKSIZ
+ 1 - dirp
->dd_loc
) {
535 Dprintf(stderr
, "corrupted directory: bad reclen %d\n",
539 dirp
->dd_loc
+= dp
->d_reclen
;
540 if (dp
->d_ino
== 0 && strcmp(dp
->d_name
, "/") == 0)
542 if (dp
->d_ino
>= maxino
) {
543 Dprintf(stderr
, "corrupted directory: bad inum %d\n",
552 * Simulate the opening of a directory
555 rst_opendir(const char *name
)
561 if ((ino
= dirlookup(name
)) > 0 &&
562 (itp
= inotablookup(ino
)) != NULL
) {
563 dirp
= opendirfile(dirfile
);
564 rst_seekdir(dirp
, itp
->t_seekpt
, itp
->t_seekpt
);
571 * In our case, there is nothing to do when closing a directory.
574 rst_closedir(RST_DIR
*dirp
)
577 (void)close(dirp
->dd_fd
);
583 * Simulate finding the current offset in the directory.
586 rst_telldir(RST_DIR
*dirp
)
588 return ((long)lseek(dirp
->dd_fd
,
589 (off_t
)0, SEEK_CUR
) - dirp
->dd_size
+ dirp
->dd_loc
);
593 * Open a directory file.
596 opendirfile(const char *name
)
598 register RST_DIR
*dirp
;
601 if ((fd
= open(name
, O_RDONLY
)) == -1)
603 if ((dirp
= malloc(sizeof(RST_DIR
))) == NULL
) {
613 * Set the mode, owner, and times for all new or changed directories
616 setdirmodes(int flags
)
619 struct modeinfo node
;
623 Vprintf(stdout
, "Set directory mode, owner, and times.\n");
624 if (command
== 'r' || command
== 'R')
625 (void) snprintf(modefile
, sizeof(modefile
), "%s/rstmode%lu", tmpdir
, (long)dumpdate
);
626 if (modefile
[0] == '#') {
627 panic("modefile not defined\n");
628 fprintf(stderr
, "directory mode, owner, and times not set\n");
631 mf
= fopen(modefile
, "r");
634 fprintf(stderr
, "cannot open mode file %s\n", modefile
);
635 fprintf(stderr
, "directory mode, owner, and times not set\n");
640 (void) fread((char *)&node
, 1, sizeof(struct modeinfo
), mf
);
643 ep
= lookupino(node
.ino
);
644 if (command
== 'i' || command
== 'x') {
647 if ((flags
& FORCE
) == 0 && ep
->e_flags
& EXISTED
) {
651 if (node
.ino
== ROOTINO
&&
652 reply("set owner/mode for '.'") == FAIL
)
656 panic("cannot find directory inode %d\n", node
.ino
);
659 (void) chown(cp
, node
.uid
, node
.gid
);
660 (void) chmod(cp
, node
.mode
);
662 (void) setflags(cp
, node
.flags
);
664 (void) chflags(cp
, node
.flags
);
666 utimes(cp
, node
.timep
);
671 panic("error setting directory modes\n");
676 * Generate a literal copy of a directory.
679 genliteraldir(char *name
, ino_t ino
)
681 register struct inotab
*itp
;
682 int ofile
, dp
, i
, size
;
685 itp
= inotablookup(ino
);
687 panic("Cannot find directory inode %d named %s\n", ino
, name
);
688 if ((ofile
= open(name
, O_WRONLY
| O_CREAT
| O_TRUNC
, 0666)) < 0) {
689 warn("%s: cannot create file\n", name
);
692 rst_seekdir(dirp
, itp
->t_seekpt
, itp
->t_seekpt
);
693 dp
= dup(dirp
->dd_fd
);
694 for (i
= itp
->t_size
; i
> 0; i
-= BUFSIZ
) {
695 size
= i
< BUFSIZ
? i
: BUFSIZ
;
696 if (read(dp
, buf
, (int) size
) == -1) {
697 warnx("write error extracting inode %lu, name %s\n",
698 (unsigned long)curfile
.ino
, curfile
.name
);
701 if (!Nflag
&& write(ofile
, buf
, (int) size
) == -1) {
702 warnx("write error extracting inode %lu, name %s\n",
703 (unsigned long)curfile
.ino
, curfile
.name
);
713 * Determine the type of an inode
720 itp
= inotablookup(ino
);
727 * Allocate and initialize a directory inode entry.
728 * If requested, save its pertinent mode, owner, and time info.
730 static struct inotab
*
732 allocinotab(ino_t ino
, struct new_bsd_inode
*dip
, long seekpt
)
734 allocinotab(ino_t ino
, struct dinode
*dip
, long seekpt
)
737 register struct inotab
*itp
;
738 struct modeinfo node
;
740 itp
= calloc(1, sizeof(struct inotab
));
742 panic("no memory directory table\n");
743 itp
->t_next
= inotab
[INOHASH(ino
)];
744 inotab
[INOHASH(ino
)] = itp
;
746 itp
->t_seekpt
= seekpt
;
751 node
.timep
[0].tv_sec
= dip
->di_atime
.tv_sec
;
752 node
.timep
[0].tv_usec
= dip
->di_atime
.tv_usec
;
753 node
.timep
[1].tv_sec
= dip
->di_mtime
.tv_sec
;
754 node
.timep
[1].tv_usec
= dip
->di_mtime
.tv_usec
;
755 #else /* __linux__ */
756 node
.timep
[0].tv_sec
= dip
->di_atime
;
757 node
.timep
[0].tv_usec
= dip
->di_atimensec
/ 1000;
758 node
.timep
[1].tv_sec
= dip
->di_mtime
;
759 node
.timep
[1].tv_usec
= dip
->di_mtimensec
/ 1000;
760 #endif /* __linux__ */
761 node
.mode
= dip
->di_mode
;
762 node
.flags
= dip
->di_flags
;
763 node
.uid
= dip
->di_uid
;
764 node
.gid
= dip
->di_gid
;
765 (void) fwrite((char *)&node
, 1, sizeof(struct modeinfo
), mf
);
770 * Look up an inode in the table of directories
772 static struct inotab
*
773 inotablookup(ino_t ino
)
775 register struct inotab
*itp
;
777 for (itp
= inotab
[INOHASH(ino
)]; itp
!= NULL
; itp
= itp
->t_next
)
778 if (itp
->t_ino
== ino
)
790 if (modefile
[0] != '#')
791 (void) unlink(modefile
);
792 if (dirfile
[0] != '#')
793 (void) unlink(dirfile
);