]>
git.wh0rd.org - dump.git/blob - restore/dirs.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@noos.fr>, 1999-2000
6 * Stelian Pop <pop@noos.fr> - AlcĂ´ve <www.alcove.fr>, 2000
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
48 static const char rcsid
[] =
49 "$Id: dirs.c,v 1.14 2001/03/20 10:02:48 stelian Exp $";
53 #include <sys/param.h>
58 #include <linux/ext2_fs.h>
59 #include <bsdcompat.h>
61 #include <ufs/ufs/dinode.h>
62 #include <ufs/ufs/dir.h>
63 #endif /* __linux__ */
64 #include <protocols/dumprestore.h>
66 #include <compaterr.h>
76 #include <machine/endian.h>
79 #include "pathnames.h"
84 * Symbol table of directories read from tape.
87 #define INOHASH(val) (val % HASHSIZE)
89 struct inotab
*t_next
;
94 static struct inotab
*inotab
[HASHSIZE
];
97 * Information retained about directories.
101 struct timeval timep
[2];
109 * Definitions for library routines operating on directories.
112 #define DIRBLKSIZ 1024
117 char dd_buf
[DIRBLKSIZ
];
121 * Global variables for this file.
124 static FILE *df
, *mf
;
125 static RST_DIR
*dirp
;
126 static char dirfile
[MAXPATHLEN
] = "#"; /* No file */
127 static char modefile
[MAXPATHLEN
] = "#"; /* No file */
128 static char dot
[2] = "."; /* So it can be modified */
131 * Format of old style directories.
136 char d_name
[ODIRSIZ
];
140 static struct inotab
*allocinotab
__P((dump_ino_t
, struct new_bsd_inode
*, long));
142 static struct inotab
*allocinotab
__P((dump_ino_t
, struct dinode
*, long));
144 static void dcvt
__P((struct odirect
*, struct direct
*));
145 static void flushent
__P((void));
146 static struct inotab
*inotablookup
__P((dump_ino_t
));
147 static RST_DIR
*opendirfile
__P((const char *));
148 static void putdir
__P((char *, size_t));
149 static void putent
__P((struct direct
*));
150 static void rst_seekdir
__P((RST_DIR
*, long, long));
151 static long rst_telldir
__P((RST_DIR
*));
152 static struct direct
*searchdir
__P((dump_ino_t
, char *));
155 * Extract directory contents, building up a directory structure
156 * on disk for extraction by name.
157 * If genmode is requested, save mode, owner, and times for all
158 * directories on the tape.
161 extractdirs(int genmode
)
165 register struct new_bsd_inode
*ip
;
167 register struct dinode
*ip
;
170 struct direct nulldir
;
173 Vprintf(stdout
, "Extract directories from tape\n");
174 (void) snprintf(dirfile
, sizeof(dirfile
), "%s/rstdir%ld", tmpdir
,
176 if (command
!= 'r' && command
!= 'R') {
177 (void) strncat(dirfile
, "-XXXXXX",
178 sizeof(dirfile
) - strlen(dirfile
));
179 fd
= mkstemp(dirfile
);
181 fd
= open(dirfile
, O_RDWR
|O_CREAT
|O_EXCL
, 0666);
182 if (fd
== -1 || (df
= fdopen(fd
, "w")) == NULL
) {
185 err(1, "cannot create directory temporary %s", dirfile
);
188 (void) snprintf(modefile
, sizeof(modefile
), "%s/rstmode%ld", tmpdir
, (long)dumpdate
);
189 if (command
!= 'r' && command
!= 'R') {
190 (void) strncat(modefile
, "-XXXXXX",
191 sizeof(modefile
) - strlen(modefile
));
192 fd
= mkstemp(modefile
);
194 fd
= open(modefile
, O_RDWR
|O_CREAT
|O_EXCL
, 0666);
195 if (fd
== -1 || (mf
= fdopen(fd
, "w")) == NULL
) {
198 err(1, "cannot create modefile %s", modefile
);
202 nulldir
.d_type
= DT_DIR
;
203 nulldir
.d_namlen
= 1;
204 nulldir
.d_name
[0] = '/';
205 nulldir
.d_name
[1] = '\0';
206 nulldir
.d_reclen
= DIRSIZ(0, &nulldir
);
208 curfile
.name
= "<directory file - name unknown>";
209 curfile
.action
= USING
;
211 if (ip
== NULL
|| (ip
->di_mode
& IFMT
) != IFDIR
) {
212 if ( fclose(df
) == EOF
)
213 err(1, "cannot write to file %s", dirfile
);
214 dirp
= opendirfile(dirfile
);
217 if (mf
!= NULL
&& fclose(mf
) == EOF
)
218 err(1, "cannot write to file %s", dirfile
);
221 panic("Root directory is not on tape\n");
224 itp
= allocinotab(curfile
.ino
, ip
, seekpt
);
225 getfile(putdir
, xtrnull
);
228 itp
->t_size
= seekpt
- itp
->t_seekpt
;
233 * skip over all the directories on the tape
239 while (curfile
.dip
&& (curfile
.dip
->di_mode
& IFMT
) == IFDIR
) {
245 * Recursively find names and inumbers of all files in subtree
246 * pname and pass them off to be processed.
249 treescan(char *pname
, dump_ino_t ino
, long (*todo
) __P((char *, dump_ino_t
, int)))
251 register struct inotab
*itp
;
252 register struct direct
*dp
;
255 char locname
[MAXPATHLEN
+ 1];
257 itp
= inotablookup(ino
);
260 * Pname is name of a simple file or an unchanged directory.
262 (void) (*todo
)(pname
, ino
, LEAF
);
266 * Pname is a dumped directory name.
268 if ((*todo
)(pname
, ino
, NODE
) == FAIL
)
271 * begin search through the directory
272 * skipping over "." and ".."
274 namelen
= snprintf(locname
, sizeof(locname
), "%s/", pname
);
275 if (namelen
>= sizeof(locname
))
276 namelen
= sizeof(locname
) - 1;
277 rst_seekdir(dirp
, itp
->t_seekpt
, itp
->t_seekpt
);
278 dp
= rst_readdir(dirp
); /* "." */
279 if (dp
!= NULL
&& strcmp(dp
->d_name
, ".") == 0)
280 dp
= rst_readdir(dirp
); /* ".." */
282 fprintf(stderr
, "Warning: `.' missing from directory %s\n",
284 if (dp
!= NULL
&& strcmp(dp
->d_name
, "..") == 0)
285 dp
= rst_readdir(dirp
); /* first real entry */
287 fprintf(stderr
, "Warning: `..' missing from directory %s\n",
289 bpt
= rst_telldir(dirp
);
291 * a zero inode signals end of directory
294 locname
[namelen
] = '\0';
295 if (namelen
+ dp
->d_namlen
>= sizeof(locname
)) {
296 fprintf(stderr
, "%s%s: name exceeds %ld char\n",
297 locname
, dp
->d_name
, (long)sizeof(locname
) - 1);
299 (void) strncat(locname
, dp
->d_name
, (int)dp
->d_namlen
);
300 treescan(locname
, dp
->d_ino
, todo
);
301 rst_seekdir(dirp
, bpt
, itp
->t_seekpt
);
303 dp
= rst_readdir(dirp
);
304 bpt
= rst_telldir(dirp
);
309 * Lookup a pathname which is always assumed to start from the ROOTINO.
312 pathsearch(const char *pathname
)
316 char *path
, *name
, buffer
[MAXPATHLEN
];
318 strcpy(buffer
, pathname
);
324 while ((name
= strsep(&path
, "/")) != NULL
&& *name
/* != NULL */) {
325 if ((dp
= searchdir(ino
, name
)) == NULL
)
333 * Lookup the requested name in directory inum.
334 * Return its inode number if found, zero if it does not exist.
336 static struct direct
*
337 searchdir(dump_ino_t inum
, char *name
)
339 register struct direct
*dp
;
340 register struct inotab
*itp
;
343 itp
= inotablookup(inum
);
346 rst_seekdir(dirp
, itp
->t_seekpt
, itp
->t_seekpt
);
349 dp
= rst_readdir(dirp
);
352 } while (dp
->d_namlen
!= len
|| strncmp(dp
->d_name
, name
, len
) != 0);
357 * Put the directory entries in the directory file
360 putdir(char *buf
, size_t size
)
362 struct direct cvtbuf
;
363 register struct odirect
*odp
;
364 struct odirect
*eodp
;
365 register struct direct
*dp
;
369 eodp
= (struct odirect
*)&buf
[size
];
370 for (odp
= (struct odirect
*)buf
; odp
< eodp
; odp
++)
371 if (odp
->d_ino
!= 0) {
376 for (loc
= 0; loc
< size
; ) {
377 dp
= (struct direct
*)(buf
+ loc
);
379 printf ("reclen = %d, namlen = %d, type = %d\n",
380 dp
->d_reclen
, dp
->d_namlen
, dp
->d_type
);
383 swabst((u_char
*)"is", (u_char
*) dp
);
384 if (oldinofmt
&& dp
->d_ino
!= 0) {
385 # if BYTE_ORDER == BIG_ENDIAN
387 dp
->d_namlen
= dp
->d_type
;
390 dp
->d_namlen
= dp
->d_type
;
392 dp
->d_type
= DT_UNKNOWN
;
395 printf ("reclen = %d, namlen = %d, type = %d\n",
396 dp
->d_reclen
, dp
->d_namlen
, dp
->d_type
);
398 i
= DIRBLKSIZ
- (loc
& (DIRBLKSIZ
- 1));
399 if ((dp
->d_reclen
& 0x3) != 0 ||
401 dp
->d_reclen
< DIRSIZ(0, dp
) ||
402 dp
->d_namlen
> MAXNAMLEN
) {
403 Vprintf(stdout
, "Mangled directory: ");
404 if ((dp
->d_reclen
& 0x3) != 0)
406 "reclen not multiple of 4 ");
407 if (dp
->d_reclen
< DIRSIZ(0, dp
))
409 "reclen less than DIRSIZ (%d < %d) ",
410 dp
->d_reclen
, DIRSIZ(0, dp
));
411 if (dp
->d_namlen
> MAXNAMLEN
)
413 "reclen name too big (%d > %d) ",
414 dp
->d_namlen
, MAXNAMLEN
);
415 Vprintf(stdout
, "\n");
420 if (dp
->d_ino
!= 0) {
428 * These variables are "local" to the following two functions.
430 char dirbuf
[DIRBLKSIZ
];
435 * add a new directory entry to a file.
438 putent(struct direct
*dp
)
440 dp
->d_reclen
= DIRSIZ(0, dp
);
441 if (dirloc
+ dp
->d_reclen
> DIRBLKSIZ
) {
442 ((struct direct
*)(dirbuf
+ prev
))->d_reclen
=
444 if ( fwrite(dirbuf
, 1, DIRBLKSIZ
, df
) != DIRBLKSIZ
)
445 err(1,"cannot write to file %s", dirfile
);
448 memmove(dirbuf
+ dirloc
, dp
, (size_t)dp
->d_reclen
);
450 dirloc
+= dp
->d_reclen
;
454 * flush out a directory that is finished.
459 ((struct direct
*)(dirbuf
+ prev
))->d_reclen
= DIRBLKSIZ
- prev
;
460 if ( fwrite(dirbuf
, (int)dirloc
, 1, df
) != 1 )
461 err(1, "cannot write to file %s", dirfile
);
464 err(1, "cannot write to file %s", dirfile
);
469 dcvt(struct odirect
*odp
, struct direct
*ndp
)
472 memset(ndp
, 0, (size_t)(sizeof *ndp
));
473 ndp
->d_ino
= odp
->d_ino
;
474 ndp
->d_type
= DT_UNKNOWN
;
475 (void) strncpy(ndp
->d_name
, odp
->d_name
, ODIRSIZ
);
476 ndp
->d_namlen
= strlen(ndp
->d_name
);
477 ndp
->d_reclen
= DIRSIZ(0, ndp
);
481 * Seek to an entry in a directory.
482 * Only values returned by rst_telldir should be passed to rst_seekdir.
483 * This routine handles many directories in a single file.
484 * It takes the base of the directory in the file, plus
485 * the desired seek offset into it.
488 rst_seekdir(RST_DIR
*dirp
, long loc
, long base
)
491 if (loc
== rst_telldir(dirp
))
495 fprintf(stderr
, "bad seek pointer to rst_seekdir %ld\n", loc
);
496 (void) lseek(dirp
->dd_fd
, base
+ (loc
& ~(DIRBLKSIZ
- 1)), SEEK_SET
);
497 dirp
->dd_loc
= loc
& (DIRBLKSIZ
- 1);
498 if (dirp
->dd_loc
!= 0)
499 dirp
->dd_size
= read(dirp
->dd_fd
, dirp
->dd_buf
, DIRBLKSIZ
);
503 * get next entry in a directory.
506 rst_readdir(RST_DIR
*dirp
)
508 register struct direct
*dp
;
511 if (dirp
->dd_loc
== 0) {
512 dirp
->dd_size
= read(dirp
->dd_fd
, dirp
->dd_buf
,
514 if (dirp
->dd_size
<= 0) {
515 Dprintf(stderr
, "error reading directory\n");
519 if (dirp
->dd_loc
>= dirp
->dd_size
) {
523 dp
= (struct direct
*)(dirp
->dd_buf
+ dirp
->dd_loc
);
524 if (dp
->d_reclen
== 0 ||
525 dp
->d_reclen
> DIRBLKSIZ
+ 1 - dirp
->dd_loc
) {
526 Dprintf(stderr
, "corrupted directory: bad reclen %d\n",
530 dirp
->dd_loc
+= dp
->d_reclen
;
531 if (dp
->d_ino
== 0 && strcmp(dp
->d_name
, "/") == 0)
533 if (dp
->d_ino
>= maxino
) {
534 Dprintf(stderr
, "corrupted directory: bad inum %d\n",
543 * Simulate the opening of a directory
546 rst_opendir(const char *name
)
552 if ((ino
= dirlookup(name
)) > 0 &&
553 (itp
= inotablookup(ino
)) != NULL
) {
554 dirp
= opendirfile(dirfile
);
555 rst_seekdir(dirp
, itp
->t_seekpt
, itp
->t_seekpt
);
562 * In our case, there is nothing to do when closing a directory.
565 rst_closedir(RST_DIR
*dirp
)
568 (void)close(dirp
->dd_fd
);
574 * Simulate finding the current offset in the directory.
577 rst_telldir(RST_DIR
*dirp
)
579 return ((long)lseek(dirp
->dd_fd
,
580 (off_t
)0, SEEK_CUR
) - dirp
->dd_size
+ dirp
->dd_loc
);
584 * Open a directory file.
587 opendirfile(const char *name
)
589 register RST_DIR
*dirp
;
592 if ((fd
= open(name
, O_RDONLY
)) == -1)
594 if ((dirp
= malloc(sizeof(RST_DIR
))) == NULL
) {
604 * Set the mode, owner, and times for all new or changed directories
607 setdirmodes(int flags
)
610 struct modeinfo node
;
614 Vprintf(stdout
, "Set directory mode, owner, and times.\n");
615 if (command
== 'r' || command
== 'R')
616 (void) snprintf(modefile
, sizeof(modefile
), "%s/rstmode%lu", tmpdir
, (long)dumpdate
);
617 if (modefile
[0] == '#') {
618 panic("modefile not defined\n");
619 fprintf(stderr
, "directory mode, owner, and times not set\n");
622 mf
= fopen(modefile
, "r");
625 fprintf(stderr
, "cannot open mode file %s\n", modefile
);
626 fprintf(stderr
, "directory mode, owner, and times not set\n");
631 (void) fread((char *)&node
, 1, sizeof(struct modeinfo
), mf
);
634 ep
= lookupino(node
.ino
);
635 if (command
== 'i' || command
== 'x') {
638 if ((flags
& FORCE
) == 0 && ep
->e_flags
& EXISTED
) {
642 if (node
.ino
== ROOTINO
&&
643 reply("set owner/mode for '.'") == FAIL
)
647 panic("cannot find directory inode %d\n", node
.ino
);
650 (void) chown(cp
, node
.uid
, node
.gid
);
651 (void) chmod(cp
, node
.mode
);
654 (void) fsetflags(cp
, node
.flags
);
656 (void) chflags(cp
, node
.flags
);
658 utimes(cp
, node
.timep
);
663 panic("error setting directory modes\n");
668 * Generate a literal copy of a directory.
671 genliteraldir(char *name
, dump_ino_t ino
)
673 register struct inotab
*itp
;
674 int ofile
, dp
, i
, size
;
677 itp
= inotablookup(ino
);
679 panic("Cannot find directory inode %d named %s\n", ino
, name
);
680 if ((ofile
= open(name
, O_WRONLY
| O_CREAT
| O_TRUNC
, 0666)) < 0) {
681 warn("%s: cannot create file\n", name
);
684 rst_seekdir(dirp
, itp
->t_seekpt
, itp
->t_seekpt
);
685 dp
= dup(dirp
->dd_fd
);
686 for (i
= itp
->t_size
; i
> 0; i
-= BUFSIZ
) {
687 size
= i
< BUFSIZ
? i
: BUFSIZ
;
688 if (read(dp
, buf
, (int) size
) == -1) {
689 warnx("write error extracting inode %lu, name %s\n",
690 (unsigned long)curfile
.ino
, curfile
.name
);
693 if (!Nflag
&& write(ofile
, buf
, (int) size
) == -1) {
694 warnx("write error extracting inode %lu, name %s\n",
695 (unsigned long)curfile
.ino
, curfile
.name
);
705 * Determine the type of an inode
708 inodetype(dump_ino_t ino
)
712 itp
= inotablookup(ino
);
719 * Allocate and initialize a directory inode entry.
720 * If requested, save its pertinent mode, owner, and time info.
722 static struct inotab
*
724 allocinotab(dump_ino_t ino
, struct new_bsd_inode
*dip
, long seekpt
)
726 allocinotab(dump_ino_t ino
, struct dinode
*dip
, long seekpt
)
729 register struct inotab
*itp
;
730 struct modeinfo node
;
732 itp
= calloc(1, sizeof(struct inotab
));
734 panic("no memory directory table\n");
735 itp
->t_next
= inotab
[INOHASH(ino
)];
736 inotab
[INOHASH(ino
)] = itp
;
738 itp
->t_seekpt
= seekpt
;
743 node
.timep
[0].tv_sec
= dip
->di_atime
.tv_sec
;
744 node
.timep
[0].tv_usec
= dip
->di_atime
.tv_usec
;
745 node
.timep
[1].tv_sec
= dip
->di_mtime
.tv_sec
;
746 node
.timep
[1].tv_usec
= dip
->di_mtime
.tv_usec
;
747 #else /* __linux__ */
748 node
.timep
[0].tv_sec
= dip
->di_atime
;
749 node
.timep
[0].tv_usec
= dip
->di_atimensec
/ 1000;
750 node
.timep
[1].tv_sec
= dip
->di_mtime
;
751 node
.timep
[1].tv_usec
= dip
->di_mtimensec
/ 1000;
752 #endif /* __linux__ */
753 node
.mode
= dip
->di_mode
;
754 node
.flags
= dip
->di_flags
;
755 node
.uid
= dip
->di_uid
;
756 node
.gid
= dip
->di_gid
;
757 if ( fwrite((char *)&node
, 1, sizeof(struct modeinfo
), mf
) != sizeof(struct modeinfo
) )
758 err(1,"cannot write to file %s", modefile
);
763 * Look up an inode in the table of directories
765 static struct inotab
*
766 inotablookup(dump_ino_t ino
)
768 register struct inotab
*itp
;
770 for (itp
= inotab
[INOHASH(ino
)]; itp
!= NULL
; itp
= itp
->t_next
)
771 if (itp
->t_ino
== ino
)
783 if (modefile
[0] != '#')
784 (void) unlink(modefile
);
785 if (dirfile
[0] != '#')
786 (void) unlink(dirfile
);