]>
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. Neither the name of the University nor the names of its contributors
27 * may be used to endorse or promote products derived from this software
28 * without specific prior written permission.
30 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
31 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
32 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
33 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
34 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
35 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
36 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
37 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
38 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
39 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
44 static const char rcsid
[] =
45 "$Id: dirs.c,v 1.24 2003/10/26 16:05:47 stelian Exp $";
49 #include <sys/types.h>
50 #include <sys/param.h>
55 #ifdef HAVE_EXT2FS_EXT2_FS_H
56 #include <ext2fs/ext2_fs.h>
58 #include <linux/ext2_fs.h>
60 #include <bsdcompat.h>
63 #include <sys/fcntl.h>
64 #include <bsdcompat.h>
66 #include <ufs/ufs/dinode.h>
67 #include <ufs/ufs/dir.h>
69 #endif /* __linux__ */
70 #include <protocols/dumprestore.h>
72 #include <compaterr.h>
83 #include <arpa/nameser_compat.h>
85 #include <machine/endian.h>
89 #include "pathnames.h"
94 * Symbol table of directories read from tape.
97 #define INOHASH(val) (val % HASHSIZE)
99 struct inotab
*t_next
;
104 static struct inotab
*inotab
[HASHSIZE
];
107 * Information retained about directories.
111 struct timeval timep
[2];
119 * Definitions for library routines operating on directories.
122 #define DIRBLKSIZ 1024
127 char dd_buf
[DIRBLKSIZ
];
131 * Global variables for this file.
134 static FILE *df
, *mf
;
135 static RST_DIR
*dirp
;
136 static char dirfile
[MAXPATHLEN
] = "#"; /* No file */
137 static char modefile
[MAXPATHLEN
] = "#"; /* No file */
138 static char dot
[2] = "."; /* So it can be modified */
141 * Format of old style directories.
146 char d_name
[ODIRSIZ
];
149 #if defined(__linux__) || defined(sunos)
150 static struct inotab
*allocinotab
__P((dump_ino_t
, struct new_bsd_inode
*, long));
152 static struct inotab
*allocinotab
__P((dump_ino_t
, struct dinode
*, long));
154 static void dcvt
__P((struct odirect
*, struct direct
*));
155 static void flushent
__P((void));
156 static struct inotab
*inotablookup
__P((dump_ino_t
));
157 static RST_DIR
*opendirfile
__P((const char *));
158 static void putdir
__P((char *, size_t));
159 static void putent
__P((struct direct
*));
160 static void rst_seekdir
__P((RST_DIR
*, long, long));
161 static long rst_telldir
__P((RST_DIR
*));
162 static struct direct
*searchdir
__P((dump_ino_t
, char *));
169 * Extract directory contents, building up a directory structure
170 * on disk for extraction by name.
171 * If genmode is requested, save mode, owner, and times for all
172 * directories on the tape.
175 extractdirs(int genmode
)
178 #if defined(__linux__) || defined(sunos)
179 struct new_bsd_inode
*ip
;
184 struct direct nulldir
;
187 Vprintf(stdout
, "Extract directories from tape\n");
188 (void) snprintf(dirfile
, sizeof(dirfile
), "%s/rstdir%ld", tmpdir
,
190 if (command
!= 'r' && command
!= 'R') {
191 (void) strncat(dirfile
, "-XXXXXX",
192 sizeof(dirfile
) - strlen(dirfile
));
193 fd
= mkstemp(dirfile
);
195 fd
= open(dirfile
, O_RDWR
|O_CREAT
|O_EXCL
, 0666);
196 if (fd
== -1 || (df
= fdopen(fd
, "w")) == NULL
) {
199 err(1, "cannot create directory temporary %s", dirfile
);
202 (void) snprintf(modefile
, sizeof(modefile
), "%s/rstmode%ld", tmpdir
, (long)dumpdate
);
203 if (command
!= 'r' && command
!= 'R') {
204 (void) strncat(modefile
, "-XXXXXX",
205 sizeof(modefile
) - strlen(modefile
));
206 fd
= mkstemp(modefile
);
208 fd
= open(modefile
, O_RDWR
|O_CREAT
|O_EXCL
, 0666);
209 if (fd
== -1 || (mf
= fdopen(fd
, "w")) == NULL
) {
212 err(1, "cannot create modefile %s", modefile
);
216 nulldir
.d_type
= DT_DIR
;
217 nulldir
.d_namlen
= 1;
218 nulldir
.d_name
[0] = '/';
219 nulldir
.d_name
[1] = '\0';
220 nulldir
.d_reclen
= DIRSIZ(0, &nulldir
);
222 curfile
.name
= "<directory file - name unknown>";
223 curfile
.action
= USING
;
225 if (ip
== NULL
|| (ip
->di_mode
& IFMT
) != IFDIR
) {
226 if ( fclose(df
) == EOF
)
227 err(1, "cannot write to file %s", dirfile
);
228 dirp
= opendirfile(dirfile
);
231 if (mf
!= NULL
&& fclose(mf
) == EOF
)
232 err(1, "cannot write to file %s", dirfile
);
235 panic("Root directory is not on tape\n");
238 itp
= allocinotab(curfile
.ino
, ip
, seekpt
);
239 getfile(putdir
, xtrnull
);
242 itp
->t_size
= seekpt
- itp
->t_seekpt
;
247 * skip over all the directories on the tape
253 while (curfile
.dip
&& (curfile
.dip
->di_mode
& IFMT
) == IFDIR
) {
259 * Recursively find names and inumbers of all files in subtree
260 * pname and pass them off to be processed.
263 treescan(char *pname
, dump_ino_t ino
, long (*todo
) __P((char *, dump_ino_t
, int)))
269 char locname
[MAXPATHLEN
+ 1];
271 itp
= inotablookup(ino
);
274 * Pname is name of a simple file or an unchanged directory.
276 (void) (*todo
)(pname
, ino
, LEAF
);
280 * Pname is a dumped directory name.
282 if ((*todo
)(pname
, ino
, NODE
) == FAIL
)
285 * begin search through the directory
286 * skipping over "." and ".."
288 namelen
= snprintf(locname
, sizeof(locname
), "%s/", pname
);
289 if (namelen
>= (int)sizeof(locname
))
290 namelen
= sizeof(locname
) - 1;
291 rst_seekdir(dirp
, itp
->t_seekpt
, itp
->t_seekpt
);
292 dp
= rst_readdir(dirp
); /* "." */
293 if (dp
!= NULL
&& strcmp(dp
->d_name
, ".") == 0)
294 dp
= rst_readdir(dirp
); /* ".." */
296 fprintf(stderr
, "Warning: `.' missing from directory %s\n",
298 if (dp
!= NULL
&& strcmp(dp
->d_name
, "..") == 0)
299 dp
= rst_readdir(dirp
); /* first real entry */
301 fprintf(stderr
, "Warning: `..' missing from directory %s\n",
303 bpt
= rst_telldir(dirp
);
305 * a zero inode signals end of directory
308 locname
[namelen
] = '\0';
309 if (namelen
+ dp
->d_namlen
>= (int)sizeof(locname
)) {
310 fprintf(stderr
, "%s%s: name exceeds %ld char\n",
311 locname
, dp
->d_name
, (long)sizeof(locname
) - 1);
313 (void) strncat(locname
, dp
->d_name
, (int)dp
->d_namlen
);
314 treescan(locname
, dp
->d_ino
, todo
);
315 rst_seekdir(dirp
, bpt
, itp
->t_seekpt
);
317 dp
= rst_readdir(dirp
);
318 bpt
= rst_telldir(dirp
);
323 * Lookup a pathname which is always assumed to start from the ROOTINO.
326 pathsearch(const char *pathname
)
330 char *path
, *name
, buffer
[MAXPATHLEN
];
332 strcpy(buffer
, pathname
);
339 while ((name
= strsep(&path
, "/")) != NULL
&& *name
/* != NULL */) {
341 while ((name
= strtok_r(NULL
, "/", &path
)) != NULL
&& *name
/* != NULL */) {
343 if ((dp
= searchdir(ino
, name
)) == NULL
)
351 * Lookup the requested name in directory inum.
352 * Return its inode number if found, zero if it does not exist.
354 static struct direct
*
355 searchdir(dump_ino_t inum
, char *name
)
361 itp
= inotablookup(inum
);
364 rst_seekdir(dirp
, itp
->t_seekpt
, itp
->t_seekpt
);
367 dp
= rst_readdir(dirp
);
370 } while (dp
->d_namlen
!= len
|| strncmp(dp
->d_name
, name
, len
) != 0);
375 * Put the directory entries in the directory file
378 putdir(char *buf
, size_t size
)
380 struct direct cvtbuf
;
382 struct odirect
*eodp
;
387 eodp
= (struct odirect
*)&buf
[size
];
388 for (odp
= (struct odirect
*)buf
; odp
< eodp
; odp
++)
389 if (odp
->d_ino
!= 0) {
394 for (loc
= 0; loc
< (long)size
; ) {
395 dp
= (struct direct
*)(buf
+ loc
);
397 printf ("reclen = %d, namlen = %d, type = %d\n",
398 dp
->d_reclen
, dp
->d_namlen
, dp
->d_type
);
401 swabst((u_char
*)"is", (u_char
*) dp
);
402 if (oldinofmt
&& dp
->d_ino
!= 0) {
403 # if BYTE_ORDER == BIG_ENDIAN
405 dp
->d_namlen
= dp
->d_type
;
408 dp
->d_namlen
= dp
->d_type
;
410 if (dp
->d_namlen
== 0 && dp
->d_type
!= 0)
411 dp
->d_namlen
= dp
->d_type
;
412 dp
->d_type
= DT_UNKNOWN
;
415 printf ("reclen = %d, namlen = %d, type = %d\n",
416 dp
->d_reclen
, dp
->d_namlen
, dp
->d_type
);
418 i
= DIRBLKSIZ
- (loc
& (DIRBLKSIZ
- 1));
419 if ((dp
->d_reclen
& 0x3) != 0 ||
421 dp
->d_reclen
< DIRSIZ(0, dp
) ||
422 dp
->d_namlen
> MAXNAMLEN
) {
423 Vprintf(stdout
, "Mangled directory: ");
424 if ((dp
->d_reclen
& 0x3) != 0)
426 "reclen not multiple of 4 ");
427 if (dp
->d_reclen
< DIRSIZ(0, dp
))
429 "reclen less than DIRSIZ (%d < %d) ",
430 dp
->d_reclen
, DIRSIZ(0, dp
));
431 if (dp
->d_namlen
> MAXNAMLEN
)
433 "reclen name too big (%d > %d) ",
434 dp
->d_namlen
, MAXNAMLEN
);
435 Vprintf(stdout
, "\n");
440 if (dp
->d_ino
!= 0) {
448 * These variables are "local" to the following two functions.
450 static char dirbuf
[DIRBLKSIZ
];
451 static long dirloc
= 0;
452 static long prev
= 0;
455 * add a new directory entry to a file.
458 putent(struct direct
*dp
)
460 dp
->d_reclen
= DIRSIZ(0, dp
);
461 if (dirloc
+ dp
->d_reclen
> DIRBLKSIZ
) {
462 ((struct direct
*)(dirbuf
+ prev
))->d_reclen
=
464 if ( fwrite(dirbuf
, 1, DIRBLKSIZ
, df
) != DIRBLKSIZ
)
465 err(1,"cannot write to file %s", dirfile
);
468 memmove(dirbuf
+ dirloc
, dp
, (size_t)dp
->d_reclen
);
470 dirloc
+= dp
->d_reclen
;
474 * flush out a directory that is finished.
479 ((struct direct
*)(dirbuf
+ prev
))->d_reclen
= DIRBLKSIZ
- prev
;
480 if ( fwrite(dirbuf
, (int)dirloc
, 1, df
) != 1 )
481 err(1, "cannot write to file %s", dirfile
);
484 err(1, "cannot write to file %s", dirfile
);
489 dcvt(struct odirect
*odp
, struct direct
*ndp
)
492 memset(ndp
, 0, (size_t)(sizeof *ndp
));
493 ndp
->d_ino
= odp
->d_ino
;
494 ndp
->d_type
= DT_UNKNOWN
;
495 (void) strncpy(ndp
->d_name
, odp
->d_name
, ODIRSIZ
);
496 ndp
->d_namlen
= strlen(ndp
->d_name
);
497 ndp
->d_reclen
= DIRSIZ(0, ndp
);
501 * Seek to an entry in a directory.
502 * Only values returned by rst_telldir should be passed to rst_seekdir.
503 * This routine handles many directories in a single file.
504 * It takes the base of the directory in the file, plus
505 * the desired seek offset into it.
508 rst_seekdir(RST_DIR
*dirp
, long loc
, long base
)
511 if (loc
== rst_telldir(dirp
))
515 fprintf(stderr
, "bad seek pointer to rst_seekdir %ld\n", loc
);
516 (void) lseek(dirp
->dd_fd
, base
+ (loc
& ~(DIRBLKSIZ
- 1)), SEEK_SET
);
517 dirp
->dd_loc
= loc
& (DIRBLKSIZ
- 1);
518 if (dirp
->dd_loc
!= 0)
519 dirp
->dd_size
= read(dirp
->dd_fd
, dirp
->dd_buf
, DIRBLKSIZ
);
523 * get next entry in a directory.
526 rst_readdir(RST_DIR
*dirp
)
531 if (dirp
->dd_loc
== 0) {
532 dirp
->dd_size
= read(dirp
->dd_fd
, dirp
->dd_buf
,
534 if (dirp
->dd_size
<= 0) {
535 Dprintf(stderr
, "error reading directory\n");
539 if (dirp
->dd_loc
>= dirp
->dd_size
) {
543 dp
= (struct direct
*)(dirp
->dd_buf
+ dirp
->dd_loc
);
544 if (dp
->d_reclen
== 0 ||
545 dp
->d_reclen
> DIRBLKSIZ
+ 1 - dirp
->dd_loc
) {
546 Dprintf(stderr
, "corrupted directory: bad reclen %d\n",
550 dirp
->dd_loc
+= dp
->d_reclen
;
551 if (dp
->d_ino
== 0 && strcmp(dp
->d_name
, "/") == 0)
553 if (dp
->d_ino
>= maxino
) {
554 Dprintf(stderr
, "corrupted directory: bad inum %d\n",
563 * Simulate the opening of a directory
566 rst_opendir(const char *name
)
572 if ((ino
= dirlookup(name
)) > 0 &&
573 (itp
= inotablookup(ino
)) != NULL
) {
574 dirp
= opendirfile(dirfile
);
575 rst_seekdir(dirp
, itp
->t_seekpt
, itp
->t_seekpt
);
582 * In our case, there is nothing to do when closing a directory.
585 rst_closedir(RST_DIR
*dirp
)
588 (void)close(dirp
->dd_fd
);
594 * Simulate finding the current offset in the directory.
597 rst_telldir(RST_DIR
*dirp
)
599 return ((long)lseek(dirp
->dd_fd
,
600 (OFF_T
)0, SEEK_CUR
) - dirp
->dd_size
+ dirp
->dd_loc
);
604 * Open a directory file.
607 opendirfile(const char *name
)
612 if ((fd
= open(name
, O_RDONLY
)) == -1)
614 if ((dirp
= malloc(sizeof(RST_DIR
))) == NULL
) {
624 * Set the mode, owner, and times for all new or changed directories
627 setdirmodes(int flags
)
630 struct modeinfo node
;
634 Vprintf(stdout
, "Set directory mode, owner, and times.\n");
635 if (command
== 'r' || command
== 'R')
636 (void) snprintf(modefile
, sizeof(modefile
), "%s/rstmode%lu", tmpdir
, (long)dumpdate
);
637 if (modefile
[0] == '#') {
638 panic("modefile not defined\n");
639 fprintf(stderr
, "directory mode, owner, and times not set\n");
642 mf
= fopen(modefile
, "r");
645 fprintf(stderr
, "cannot open mode file %s\n", modefile
);
646 fprintf(stderr
, "directory mode, owner, and times not set\n");
651 (void) fread((char *)&node
, 1, sizeof(struct modeinfo
), mf
);
654 ep
= lookupino(node
.ino
);
655 if (command
== 'i' || command
== 'x') {
658 if ((flags
& FORCE
) == 0 && ep
->e_flags
& EXISTED
) {
662 if ((flags
& FORCE
) == 0 &&
663 node
.ino
== ROOTINO
&&
664 reply("set owner/mode for '.'") == FAIL
)
668 panic("cannot find directory inode %d\n", node
.ino
);
671 (void) chown(cp
, node
.uid
, node
.gid
);
672 (void) chmod(cp
, node
.mode
);
675 (void) fsetflags(cp
, node
.flags
);
679 (void) chflags(cp
, node
.flags
);
682 utimes(cp
, node
.timep
);
687 panic("error setting directory modes\n");
692 * Generate a literal copy of a directory.
695 genliteraldir(char *name
, dump_ino_t ino
)
698 int ofile
, dp
, i
, size
;
701 itp
= inotablookup(ino
);
703 panic("Cannot find directory inode %d named %s\n", ino
, name
);
704 if ((ofile
= open(name
, O_WRONLY
| O_CREAT
| O_TRUNC
, 0666)) < 0) {
705 warn("%s: cannot create file\n", name
);
708 rst_seekdir(dirp
, itp
->t_seekpt
, itp
->t_seekpt
);
709 dp
= dup(dirp
->dd_fd
);
710 for (i
= itp
->t_size
; i
> 0; i
-= BUFSIZ
) {
711 size
= i
< BUFSIZ
? i
: BUFSIZ
;
712 if (read(dp
, buf
, (int) size
) == -1) {
713 warnx("write error extracting inode %lu, name %s\n",
714 (unsigned long)curfile
.ino
, curfile
.name
);
717 if (!Nflag
&& write(ofile
, buf
, (int) size
) == -1) {
718 warnx("write error extracting inode %lu, name %s\n",
719 (unsigned long)curfile
.ino
, curfile
.name
);
729 * Determine the type of an inode
732 inodetype(dump_ino_t ino
)
736 itp
= inotablookup(ino
);
743 * Allocate and initialize a directory inode entry.
744 * If requested, save its pertinent mode, owner, and time info.
746 static struct inotab
*
747 #if defined(__linux__) || defined(sunos)
748 allocinotab(dump_ino_t ino
, struct new_bsd_inode
*dip
, long seekpt
)
750 allocinotab(dump_ino_t ino
, struct dinode
*dip
, long seekpt
)
754 struct modeinfo node
;
756 itp
= calloc(1, sizeof(struct inotab
));
758 panic("no memory directory table\n");
759 itp
->t_next
= inotab
[INOHASH(ino
)];
760 inotab
[INOHASH(ino
)] = itp
;
762 itp
->t_seekpt
= seekpt
;
766 #if defined(__linux__) || defined(sunos)
767 node
.timep
[0].tv_sec
= dip
->di_atime
.tv_sec
;
768 node
.timep
[0].tv_usec
= dip
->di_atime
.tv_usec
;
769 node
.timep
[1].tv_sec
= dip
->di_mtime
.tv_sec
;
770 node
.timep
[1].tv_usec
= dip
->di_mtime
.tv_usec
;
771 #else /* __linux__ || sunos */
772 node
.timep
[0].tv_sec
= dip
->di_atime
;
773 node
.timep
[0].tv_usec
= dip
->di_atimensec
/ 1000;
774 node
.timep
[1].tv_sec
= dip
->di_mtime
;
775 node
.timep
[1].tv_usec
= dip
->di_mtimensec
/ 1000;
776 #endif /* __linux__ || sunos */
777 node
.mode
= dip
->di_mode
;
778 node
.flags
= dip
->di_flags
;
779 node
.uid
= dip
->di_uid
;
780 node
.gid
= dip
->di_gid
;
781 if ( fwrite((char *)&node
, 1, sizeof(struct modeinfo
), mf
) != sizeof(struct modeinfo
) )
782 err(1,"cannot write to file %s", modefile
);
787 * Look up an inode in the table of directories
789 static struct inotab
*
790 inotablookup(dump_ino_t ino
)
794 for (itp
= inotab
[INOHASH(ino
)]; itp
!= NULL
; itp
= itp
->t_next
)
795 if (itp
->t_ino
== ino
)
807 if (modefile
[0] != '#')
808 (void) unlink(modefile
);
809 if (dirfile
[0] != '#')
810 (void) unlink(dirfile
);