]>
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 <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.
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 1.21 2002/07/19 14:57:39 stelian Exp $";
53 #include <sys/param.h>
58 #ifdef HAVE_EXT2FS_EXT2_FS_H
59 #include <ext2fs/ext2_fs.h>
61 #include <linux/ext2_fs.h>
63 #include <bsdcompat.h>
65 #include <ufs/ufs/dinode.h>
66 #include <ufs/ufs/dir.h>
67 #endif /* __linux__ */
68 #include <protocols/dumprestore.h>
70 #include <compaterr.h>
80 #include <machine/endian.h>
83 #include "pathnames.h"
88 * Symbol table of directories read from tape.
91 #define INOHASH(val) (val % HASHSIZE)
93 struct inotab
*t_next
;
98 static struct inotab
*inotab
[HASHSIZE
];
101 * Information retained about directories.
105 struct timeval timep
[2];
113 * Definitions for library routines operating on directories.
116 #define DIRBLKSIZ 1024
121 char dd_buf
[DIRBLKSIZ
];
125 * Global variables for this file.
128 static FILE *df
, *mf
;
129 static RST_DIR
*dirp
;
130 static char dirfile
[MAXPATHLEN
] = "#"; /* No file */
131 static char modefile
[MAXPATHLEN
] = "#"; /* No file */
132 static char dot
[2] = "."; /* So it can be modified */
135 * Format of old style directories.
140 char d_name
[ODIRSIZ
];
143 #if defined(__linux__) || defined(sunos)
144 static struct inotab
*allocinotab
__P((dump_ino_t
, struct new_bsd_inode
*, long));
146 static struct inotab
*allocinotab
__P((dump_ino_t
, struct dinode
*, long));
148 static void dcvt
__P((struct odirect
*, struct direct
*));
149 static void flushent
__P((void));
150 static struct inotab
*inotablookup
__P((dump_ino_t
));
151 static RST_DIR
*opendirfile
__P((const char *));
152 static void putdir
__P((char *, size_t));
153 static void putent
__P((struct direct
*));
154 static void rst_seekdir
__P((RST_DIR
*, long, long));
155 static long rst_telldir
__P((RST_DIR
*));
156 static struct direct
*searchdir
__P((dump_ino_t
, char *));
159 * Extract directory contents, building up a directory structure
160 * on disk for extraction by name.
161 * If genmode is requested, save mode, owner, and times for all
162 * directories on the tape.
165 extractdirs(int genmode
)
168 #if defined(__linux__) || defined(sunos)
169 struct new_bsd_inode
*ip
;
174 struct direct nulldir
;
177 Vprintf(stdout
, "Extract directories from tape\n");
178 (void) snprintf(dirfile
, sizeof(dirfile
), "%s/rstdir%ld", tmpdir
,
180 if (command
!= 'r' && command
!= 'R') {
181 (void) strncat(dirfile
, "-XXXXXX",
182 sizeof(dirfile
) - strlen(dirfile
));
183 fd
= mkstemp(dirfile
);
185 fd
= open(dirfile
, O_RDWR
|O_CREAT
|O_EXCL
, 0666);
186 if (fd
== -1 || (df
= fdopen(fd
, "w")) == NULL
) {
189 err(1, "cannot create directory temporary %s", dirfile
);
192 (void) snprintf(modefile
, sizeof(modefile
), "%s/rstmode%ld", tmpdir
, (long)dumpdate
);
193 if (command
!= 'r' && command
!= 'R') {
194 (void) strncat(modefile
, "-XXXXXX",
195 sizeof(modefile
) - strlen(modefile
));
196 fd
= mkstemp(modefile
);
198 fd
= open(modefile
, O_RDWR
|O_CREAT
|O_EXCL
, 0666);
199 if (fd
== -1 || (mf
= fdopen(fd
, "w")) == NULL
) {
202 err(1, "cannot create modefile %s", modefile
);
206 nulldir
.d_type
= DT_DIR
;
207 nulldir
.d_namlen
= 1;
208 nulldir
.d_name
[0] = '/';
209 nulldir
.d_name
[1] = '\0';
210 nulldir
.d_reclen
= DIRSIZ(0, &nulldir
);
212 curfile
.name
= "<directory file - name unknown>";
213 curfile
.action
= USING
;
215 if (ip
== NULL
|| (ip
->di_mode
& IFMT
) != IFDIR
) {
216 if ( fclose(df
) == EOF
)
217 err(1, "cannot write to file %s", dirfile
);
218 dirp
= opendirfile(dirfile
);
221 if (mf
!= NULL
&& fclose(mf
) == EOF
)
222 err(1, "cannot write to file %s", dirfile
);
225 panic("Root directory is not on tape\n");
228 itp
= allocinotab(curfile
.ino
, ip
, seekpt
);
229 getfile(putdir
, xtrnull
);
232 itp
->t_size
= seekpt
- itp
->t_seekpt
;
237 * skip over all the directories on the tape
243 while (curfile
.dip
&& (curfile
.dip
->di_mode
& IFMT
) == IFDIR
) {
249 * Recursively find names and inumbers of all files in subtree
250 * pname and pass them off to be processed.
253 treescan(char *pname
, dump_ino_t ino
, long (*todo
) __P((char *, dump_ino_t
, int)))
259 char locname
[MAXPATHLEN
+ 1];
261 itp
= inotablookup(ino
);
264 * Pname is name of a simple file or an unchanged directory.
266 (void) (*todo
)(pname
, ino
, LEAF
);
270 * Pname is a dumped directory name.
272 if ((*todo
)(pname
, ino
, NODE
) == FAIL
)
275 * begin search through the directory
276 * skipping over "." and ".."
278 namelen
= snprintf(locname
, sizeof(locname
), "%s/", pname
);
279 if (namelen
>= (int)sizeof(locname
))
280 namelen
= sizeof(locname
) - 1;
281 rst_seekdir(dirp
, itp
->t_seekpt
, itp
->t_seekpt
);
282 dp
= rst_readdir(dirp
); /* "." */
283 if (dp
!= NULL
&& strcmp(dp
->d_name
, ".") == 0)
284 dp
= rst_readdir(dirp
); /* ".." */
286 fprintf(stderr
, "Warning: `.' missing from directory %s\n",
288 if (dp
!= NULL
&& strcmp(dp
->d_name
, "..") == 0)
289 dp
= rst_readdir(dirp
); /* first real entry */
291 fprintf(stderr
, "Warning: `..' missing from directory %s\n",
293 bpt
= rst_telldir(dirp
);
295 * a zero inode signals end of directory
298 locname
[namelen
] = '\0';
299 if (namelen
+ dp
->d_namlen
>= (int)sizeof(locname
)) {
300 fprintf(stderr
, "%s%s: name exceeds %ld char\n",
301 locname
, dp
->d_name
, (long)sizeof(locname
) - 1);
303 (void) strncat(locname
, dp
->d_name
, (int)dp
->d_namlen
);
304 treescan(locname
, dp
->d_ino
, todo
);
305 rst_seekdir(dirp
, bpt
, itp
->t_seekpt
);
307 dp
= rst_readdir(dirp
);
308 bpt
= rst_telldir(dirp
);
313 * Lookup a pathname which is always assumed to start from the ROOTINO.
316 pathsearch(const char *pathname
)
320 char *path
, *name
, buffer
[MAXPATHLEN
];
322 strcpy(buffer
, pathname
);
329 while ((name
= strsep(&path
, "/")) != NULL
&& *name
/* != NULL */) {
331 while ((name
= strtok_r(NULL
, "/", &path
)) != NULL
&& *name
/* != NULL */) {
333 if ((dp
= searchdir(ino
, name
)) == NULL
)
341 * Lookup the requested name in directory inum.
342 * Return its inode number if found, zero if it does not exist.
344 static struct direct
*
345 searchdir(dump_ino_t inum
, char *name
)
351 itp
= inotablookup(inum
);
354 rst_seekdir(dirp
, itp
->t_seekpt
, itp
->t_seekpt
);
357 dp
= rst_readdir(dirp
);
360 } while (dp
->d_namlen
!= len
|| strncmp(dp
->d_name
, name
, len
) != 0);
365 * Put the directory entries in the directory file
368 putdir(char *buf
, size_t size
)
370 struct direct cvtbuf
;
372 struct odirect
*eodp
;
377 eodp
= (struct odirect
*)&buf
[size
];
378 for (odp
= (struct odirect
*)buf
; odp
< eodp
; odp
++)
379 if (odp
->d_ino
!= 0) {
384 for (loc
= 0; loc
< (long)size
; ) {
385 dp
= (struct direct
*)(buf
+ loc
);
387 printf ("reclen = %d, namlen = %d, type = %d\n",
388 dp
->d_reclen
, dp
->d_namlen
, dp
->d_type
);
391 swabst((u_char
*)"is", (u_char
*) dp
);
392 if (oldinofmt
&& dp
->d_ino
!= 0) {
393 # if BYTE_ORDER == BIG_ENDIAN
395 dp
->d_namlen
= dp
->d_type
;
398 dp
->d_namlen
= dp
->d_type
;
400 if (dp
->d_namlen
== 0 && dp
->d_type
!= 0)
401 dp
->d_namlen
= dp
->d_type
;
402 dp
->d_type
= DT_UNKNOWN
;
405 printf ("reclen = %d, namlen = %d, type = %d\n",
406 dp
->d_reclen
, dp
->d_namlen
, dp
->d_type
);
408 i
= DIRBLKSIZ
- (loc
& (DIRBLKSIZ
- 1));
409 if ((dp
->d_reclen
& 0x3) != 0 ||
411 dp
->d_reclen
< DIRSIZ(0, dp
) ||
412 dp
->d_namlen
> MAXNAMLEN
) {
413 Vprintf(stdout
, "Mangled directory: ");
414 if ((dp
->d_reclen
& 0x3) != 0)
416 "reclen not multiple of 4 ");
417 if (dp
->d_reclen
< DIRSIZ(0, dp
))
419 "reclen less than DIRSIZ (%d < %d) ",
420 dp
->d_reclen
, DIRSIZ(0, dp
));
421 if (dp
->d_namlen
> MAXNAMLEN
)
423 "reclen name too big (%d > %d) ",
424 dp
->d_namlen
, MAXNAMLEN
);
425 Vprintf(stdout
, "\n");
430 if (dp
->d_ino
!= 0) {
438 * These variables are "local" to the following two functions.
440 static char dirbuf
[DIRBLKSIZ
];
441 static long dirloc
= 0;
442 static long prev
= 0;
445 * add a new directory entry to a file.
448 putent(struct direct
*dp
)
450 dp
->d_reclen
= DIRSIZ(0, dp
);
451 if (dirloc
+ dp
->d_reclen
> DIRBLKSIZ
) {
452 ((struct direct
*)(dirbuf
+ prev
))->d_reclen
=
454 if ( fwrite(dirbuf
, 1, DIRBLKSIZ
, df
) != DIRBLKSIZ
)
455 err(1,"cannot write to file %s", dirfile
);
458 memmove(dirbuf
+ dirloc
, dp
, (size_t)dp
->d_reclen
);
460 dirloc
+= dp
->d_reclen
;
464 * flush out a directory that is finished.
469 ((struct direct
*)(dirbuf
+ prev
))->d_reclen
= DIRBLKSIZ
- prev
;
470 if ( fwrite(dirbuf
, (int)dirloc
, 1, df
) != 1 )
471 err(1, "cannot write to file %s", dirfile
);
474 err(1, "cannot write to file %s", dirfile
);
479 dcvt(struct odirect
*odp
, struct direct
*ndp
)
482 memset(ndp
, 0, (size_t)(sizeof *ndp
));
483 ndp
->d_ino
= odp
->d_ino
;
484 ndp
->d_type
= DT_UNKNOWN
;
485 (void) strncpy(ndp
->d_name
, odp
->d_name
, ODIRSIZ
);
486 ndp
->d_namlen
= strlen(ndp
->d_name
);
487 ndp
->d_reclen
= DIRSIZ(0, ndp
);
491 * Seek to an entry in a directory.
492 * Only values returned by rst_telldir should be passed to rst_seekdir.
493 * This routine handles many directories in a single file.
494 * It takes the base of the directory in the file, plus
495 * the desired seek offset into it.
498 rst_seekdir(RST_DIR
*dirp
, long loc
, long base
)
501 if (loc
== rst_telldir(dirp
))
505 fprintf(stderr
, "bad seek pointer to rst_seekdir %ld\n", loc
);
506 (void) lseek(dirp
->dd_fd
, base
+ (loc
& ~(DIRBLKSIZ
- 1)), SEEK_SET
);
507 dirp
->dd_loc
= loc
& (DIRBLKSIZ
- 1);
508 if (dirp
->dd_loc
!= 0)
509 dirp
->dd_size
= read(dirp
->dd_fd
, dirp
->dd_buf
, DIRBLKSIZ
);
513 * get next entry in a directory.
516 rst_readdir(RST_DIR
*dirp
)
521 if (dirp
->dd_loc
== 0) {
522 dirp
->dd_size
= read(dirp
->dd_fd
, dirp
->dd_buf
,
524 if (dirp
->dd_size
<= 0) {
525 Dprintf(stderr
, "error reading directory\n");
529 if (dirp
->dd_loc
>= dirp
->dd_size
) {
533 dp
= (struct direct
*)(dirp
->dd_buf
+ dirp
->dd_loc
);
534 if (dp
->d_reclen
== 0 ||
535 dp
->d_reclen
> DIRBLKSIZ
+ 1 - dirp
->dd_loc
) {
536 Dprintf(stderr
, "corrupted directory: bad reclen %d\n",
540 dirp
->dd_loc
+= dp
->d_reclen
;
541 if (dp
->d_ino
== 0 && strcmp(dp
->d_name
, "/") == 0)
543 if (dp
->d_ino
>= maxino
) {
544 Dprintf(stderr
, "corrupted directory: bad inum %d\n",
553 * Simulate the opening of a directory
556 rst_opendir(const char *name
)
562 if ((ino
= dirlookup(name
)) > 0 &&
563 (itp
= inotablookup(ino
)) != NULL
) {
564 dirp
= opendirfile(dirfile
);
565 rst_seekdir(dirp
, itp
->t_seekpt
, itp
->t_seekpt
);
572 * In our case, there is nothing to do when closing a directory.
575 rst_closedir(RST_DIR
*dirp
)
578 (void)close(dirp
->dd_fd
);
584 * Simulate finding the current offset in the directory.
587 rst_telldir(RST_DIR
*dirp
)
589 return ((long)lseek(dirp
->dd_fd
,
590 (off_t
)0, SEEK_CUR
) - dirp
->dd_size
+ dirp
->dd_loc
);
594 * Open a directory file.
597 opendirfile(const char *name
)
602 if ((fd
= open(name
, O_RDONLY
)) == -1)
604 if ((dirp
= malloc(sizeof(RST_DIR
))) == NULL
) {
614 * Set the mode, owner, and times for all new or changed directories
617 setdirmodes(int flags
)
620 struct modeinfo node
;
624 Vprintf(stdout
, "Set directory mode, owner, and times.\n");
625 if (command
== 'r' || command
== 'R')
626 (void) snprintf(modefile
, sizeof(modefile
), "%s/rstmode%lu", tmpdir
, (long)dumpdate
);
627 if (modefile
[0] == '#') {
628 panic("modefile not defined\n");
629 fprintf(stderr
, "directory mode, owner, and times not set\n");
632 mf
= fopen(modefile
, "r");
635 fprintf(stderr
, "cannot open mode file %s\n", modefile
);
636 fprintf(stderr
, "directory mode, owner, and times not set\n");
641 (void) fread((char *)&node
, 1, sizeof(struct modeinfo
), mf
);
644 ep
= lookupino(node
.ino
);
645 if (command
== 'i' || command
== 'x') {
648 if ((flags
& FORCE
) == 0 && ep
->e_flags
& EXISTED
) {
652 if ((flags
& FORCE
) == 0 &&
653 node
.ino
== ROOTINO
&&
654 reply("set owner/mode for '.'") == FAIL
)
658 panic("cannot find directory inode %d\n", node
.ino
);
661 (void) chown(cp
, node
.uid
, node
.gid
);
662 (void) chmod(cp
, node
.mode
);
665 (void) fsetflags(cp
, node
.flags
);
667 (void) chflags(cp
, node
.flags
);
669 utimes(cp
, node
.timep
);
674 panic("error setting directory modes\n");
679 * Generate a literal copy of a directory.
682 genliteraldir(char *name
, dump_ino_t ino
)
685 int ofile
, dp
, i
, size
;
688 itp
= inotablookup(ino
);
690 panic("Cannot find directory inode %d named %s\n", ino
, name
);
691 if ((ofile
= open(name
, O_WRONLY
| O_CREAT
| O_TRUNC
, 0666)) < 0) {
692 warn("%s: cannot create file\n", name
);
695 rst_seekdir(dirp
, itp
->t_seekpt
, itp
->t_seekpt
);
696 dp
= dup(dirp
->dd_fd
);
697 for (i
= itp
->t_size
; i
> 0; i
-= BUFSIZ
) {
698 size
= i
< BUFSIZ
? i
: BUFSIZ
;
699 if (read(dp
, buf
, (int) size
) == -1) {
700 warnx("write error extracting inode %lu, name %s\n",
701 (unsigned long)curfile
.ino
, curfile
.name
);
704 if (!Nflag
&& write(ofile
, buf
, (int) size
) == -1) {
705 warnx("write error extracting inode %lu, name %s\n",
706 (unsigned long)curfile
.ino
, curfile
.name
);
716 * Determine the type of an inode
719 inodetype(dump_ino_t ino
)
723 itp
= inotablookup(ino
);
730 * Allocate and initialize a directory inode entry.
731 * If requested, save its pertinent mode, owner, and time info.
733 static struct inotab
*
735 allocinotab(dump_ino_t ino
, struct new_bsd_inode
*dip
, long seekpt
)
737 allocinotab(dump_ino_t ino
, struct dinode
*dip
, long seekpt
)
741 struct modeinfo node
;
743 itp
= calloc(1, sizeof(struct inotab
));
745 panic("no memory directory table\n");
746 itp
->t_next
= inotab
[INOHASH(ino
)];
747 inotab
[INOHASH(ino
)] = itp
;
749 itp
->t_seekpt
= seekpt
;
754 node
.timep
[0].tv_sec
= dip
->di_atime
.tv_sec
;
755 node
.timep
[0].tv_usec
= dip
->di_atime
.tv_usec
;
756 node
.timep
[1].tv_sec
= dip
->di_mtime
.tv_sec
;
757 node
.timep
[1].tv_usec
= dip
->di_mtime
.tv_usec
;
758 #else /* __linux__ */
759 node
.timep
[0].tv_sec
= dip
->di_atime
;
760 node
.timep
[0].tv_usec
= dip
->di_atimensec
/ 1000;
761 node
.timep
[1].tv_sec
= dip
->di_mtime
;
762 node
.timep
[1].tv_usec
= dip
->di_mtimensec
/ 1000;
763 #endif /* __linux__ */
764 node
.mode
= dip
->di_mode
;
765 node
.flags
= dip
->di_flags
;
766 node
.uid
= dip
->di_uid
;
767 node
.gid
= dip
->di_gid
;
768 if ( fwrite((char *)&node
, 1, sizeof(struct modeinfo
), mf
) != sizeof(struct modeinfo
) )
769 err(1,"cannot write to file %s", modefile
);
774 * Look up an inode in the table of directories
776 static struct inotab
*
777 inotablookup(dump_ino_t ino
)
781 for (itp
= inotab
[INOHASH(ino
)]; itp
!= NULL
; itp
= itp
->t_next
)
782 if (itp
->t_ino
== ino
)
794 if (modefile
[0] != '#')
795 (void) unlink(modefile
);
796 if (dirfile
[0] != '#')
797 (void) unlink(dirfile
);