]>
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 1.23 2003/03/30 15:40:38 stelian Exp $";
49 #include <sys/param.h>
54 #ifdef HAVE_EXT2FS_EXT2_FS_H
55 #include <ext2fs/ext2_fs.h>
57 #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
];
139 #if defined(__linux__) || defined(sunos)
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
)
164 #if defined(__linux__) || defined(sunos)
165 struct new_bsd_inode
*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)))
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
>= (int)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
>= (int)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
);
325 while ((name
= strsep(&path
, "/")) != NULL
&& *name
/* != NULL */) {
327 while ((name
= strtok_r(NULL
, "/", &path
)) != NULL
&& *name
/* != NULL */) {
329 if ((dp
= searchdir(ino
, name
)) == NULL
)
337 * Lookup the requested name in directory inum.
338 * Return its inode number if found, zero if it does not exist.
340 static struct direct
*
341 searchdir(dump_ino_t inum
, char *name
)
347 itp
= inotablookup(inum
);
350 rst_seekdir(dirp
, itp
->t_seekpt
, itp
->t_seekpt
);
353 dp
= rst_readdir(dirp
);
356 } while (dp
->d_namlen
!= len
|| strncmp(dp
->d_name
, name
, len
) != 0);
361 * Put the directory entries in the directory file
364 putdir(char *buf
, size_t size
)
366 struct direct cvtbuf
;
368 struct odirect
*eodp
;
373 eodp
= (struct odirect
*)&buf
[size
];
374 for (odp
= (struct odirect
*)buf
; odp
< eodp
; odp
++)
375 if (odp
->d_ino
!= 0) {
380 for (loc
= 0; loc
< (long)size
; ) {
381 dp
= (struct direct
*)(buf
+ loc
);
383 printf ("reclen = %d, namlen = %d, type = %d\n",
384 dp
->d_reclen
, dp
->d_namlen
, dp
->d_type
);
387 swabst((u_char
*)"is", (u_char
*) dp
);
388 if (oldinofmt
&& dp
->d_ino
!= 0) {
389 # if BYTE_ORDER == BIG_ENDIAN
391 dp
->d_namlen
= dp
->d_type
;
394 dp
->d_namlen
= dp
->d_type
;
396 if (dp
->d_namlen
== 0 && dp
->d_type
!= 0)
397 dp
->d_namlen
= dp
->d_type
;
398 dp
->d_type
= DT_UNKNOWN
;
401 printf ("reclen = %d, namlen = %d, type = %d\n",
402 dp
->d_reclen
, dp
->d_namlen
, dp
->d_type
);
404 i
= DIRBLKSIZ
- (loc
& (DIRBLKSIZ
- 1));
405 if ((dp
->d_reclen
& 0x3) != 0 ||
407 dp
->d_reclen
< DIRSIZ(0, dp
) ||
408 dp
->d_namlen
> MAXNAMLEN
) {
409 Vprintf(stdout
, "Mangled directory: ");
410 if ((dp
->d_reclen
& 0x3) != 0)
412 "reclen not multiple of 4 ");
413 if (dp
->d_reclen
< DIRSIZ(0, dp
))
415 "reclen less than DIRSIZ (%d < %d) ",
416 dp
->d_reclen
, DIRSIZ(0, dp
));
417 if (dp
->d_namlen
> MAXNAMLEN
)
419 "reclen name too big (%d > %d) ",
420 dp
->d_namlen
, MAXNAMLEN
);
421 Vprintf(stdout
, "\n");
426 if (dp
->d_ino
!= 0) {
434 * These variables are "local" to the following two functions.
436 static char dirbuf
[DIRBLKSIZ
];
437 static long dirloc
= 0;
438 static long prev
= 0;
441 * add a new directory entry to a file.
444 putent(struct direct
*dp
)
446 dp
->d_reclen
= DIRSIZ(0, dp
);
447 if (dirloc
+ dp
->d_reclen
> DIRBLKSIZ
) {
448 ((struct direct
*)(dirbuf
+ prev
))->d_reclen
=
450 if ( fwrite(dirbuf
, 1, DIRBLKSIZ
, df
) != DIRBLKSIZ
)
451 err(1,"cannot write to file %s", dirfile
);
454 memmove(dirbuf
+ dirloc
, dp
, (size_t)dp
->d_reclen
);
456 dirloc
+= dp
->d_reclen
;
460 * flush out a directory that is finished.
465 ((struct direct
*)(dirbuf
+ prev
))->d_reclen
= DIRBLKSIZ
- prev
;
466 if ( fwrite(dirbuf
, (int)dirloc
, 1, df
) != 1 )
467 err(1, "cannot write to file %s", dirfile
);
470 err(1, "cannot write to file %s", dirfile
);
475 dcvt(struct odirect
*odp
, struct direct
*ndp
)
478 memset(ndp
, 0, (size_t)(sizeof *ndp
));
479 ndp
->d_ino
= odp
->d_ino
;
480 ndp
->d_type
= DT_UNKNOWN
;
481 (void) strncpy(ndp
->d_name
, odp
->d_name
, ODIRSIZ
);
482 ndp
->d_namlen
= strlen(ndp
->d_name
);
483 ndp
->d_reclen
= DIRSIZ(0, ndp
);
487 * Seek to an entry in a directory.
488 * Only values returned by rst_telldir should be passed to rst_seekdir.
489 * This routine handles many directories in a single file.
490 * It takes the base of the directory in the file, plus
491 * the desired seek offset into it.
494 rst_seekdir(RST_DIR
*dirp
, long loc
, long base
)
497 if (loc
== rst_telldir(dirp
))
501 fprintf(stderr
, "bad seek pointer to rst_seekdir %ld\n", loc
);
502 (void) lseek(dirp
->dd_fd
, base
+ (loc
& ~(DIRBLKSIZ
- 1)), SEEK_SET
);
503 dirp
->dd_loc
= loc
& (DIRBLKSIZ
- 1);
504 if (dirp
->dd_loc
!= 0)
505 dirp
->dd_size
= read(dirp
->dd_fd
, dirp
->dd_buf
, DIRBLKSIZ
);
509 * get next entry in a directory.
512 rst_readdir(RST_DIR
*dirp
)
517 if (dirp
->dd_loc
== 0) {
518 dirp
->dd_size
= read(dirp
->dd_fd
, dirp
->dd_buf
,
520 if (dirp
->dd_size
<= 0) {
521 Dprintf(stderr
, "error reading directory\n");
525 if (dirp
->dd_loc
>= dirp
->dd_size
) {
529 dp
= (struct direct
*)(dirp
->dd_buf
+ dirp
->dd_loc
);
530 if (dp
->d_reclen
== 0 ||
531 dp
->d_reclen
> DIRBLKSIZ
+ 1 - dirp
->dd_loc
) {
532 Dprintf(stderr
, "corrupted directory: bad reclen %d\n",
536 dirp
->dd_loc
+= dp
->d_reclen
;
537 if (dp
->d_ino
== 0 && strcmp(dp
->d_name
, "/") == 0)
539 if (dp
->d_ino
>= maxino
) {
540 Dprintf(stderr
, "corrupted directory: bad inum %d\n",
549 * Simulate the opening of a directory
552 rst_opendir(const char *name
)
558 if ((ino
= dirlookup(name
)) > 0 &&
559 (itp
= inotablookup(ino
)) != NULL
) {
560 dirp
= opendirfile(dirfile
);
561 rst_seekdir(dirp
, itp
->t_seekpt
, itp
->t_seekpt
);
568 * In our case, there is nothing to do when closing a directory.
571 rst_closedir(RST_DIR
*dirp
)
574 (void)close(dirp
->dd_fd
);
580 * Simulate finding the current offset in the directory.
583 rst_telldir(RST_DIR
*dirp
)
585 return ((long)lseek(dirp
->dd_fd
,
586 (OFF_T
)0, SEEK_CUR
) - dirp
->dd_size
+ dirp
->dd_loc
);
590 * Open a directory file.
593 opendirfile(const char *name
)
598 if ((fd
= open(name
, O_RDONLY
)) == -1)
600 if ((dirp
= malloc(sizeof(RST_DIR
))) == NULL
) {
610 * Set the mode, owner, and times for all new or changed directories
613 setdirmodes(int flags
)
616 struct modeinfo node
;
620 Vprintf(stdout
, "Set directory mode, owner, and times.\n");
621 if (command
== 'r' || command
== 'R')
622 (void) snprintf(modefile
, sizeof(modefile
), "%s/rstmode%lu", tmpdir
, (long)dumpdate
);
623 if (modefile
[0] == '#') {
624 panic("modefile not defined\n");
625 fprintf(stderr
, "directory mode, owner, and times not set\n");
628 mf
= fopen(modefile
, "r");
631 fprintf(stderr
, "cannot open mode file %s\n", modefile
);
632 fprintf(stderr
, "directory mode, owner, and times not set\n");
637 (void) fread((char *)&node
, 1, sizeof(struct modeinfo
), mf
);
640 ep
= lookupino(node
.ino
);
641 if (command
== 'i' || command
== 'x') {
644 if ((flags
& FORCE
) == 0 && ep
->e_flags
& EXISTED
) {
648 if ((flags
& FORCE
) == 0 &&
649 node
.ino
== ROOTINO
&&
650 reply("set owner/mode for '.'") == FAIL
)
654 panic("cannot find directory inode %d\n", node
.ino
);
657 (void) chown(cp
, node
.uid
, node
.gid
);
658 (void) chmod(cp
, node
.mode
);
661 (void) fsetflags(cp
, node
.flags
);
663 (void) chflags(cp
, node
.flags
);
665 utimes(cp
, node
.timep
);
670 panic("error setting directory modes\n");
675 * Generate a literal copy of a directory.
678 genliteraldir(char *name
, dump_ino_t ino
)
681 int ofile
, dp
, i
, size
;
684 itp
= inotablookup(ino
);
686 panic("Cannot find directory inode %d named %s\n", ino
, name
);
687 if ((ofile
= open(name
, O_WRONLY
| O_CREAT
| O_TRUNC
, 0666)) < 0) {
688 warn("%s: cannot create file\n", name
);
691 rst_seekdir(dirp
, itp
->t_seekpt
, itp
->t_seekpt
);
692 dp
= dup(dirp
->dd_fd
);
693 for (i
= itp
->t_size
; i
> 0; i
-= BUFSIZ
) {
694 size
= i
< BUFSIZ
? i
: BUFSIZ
;
695 if (read(dp
, buf
, (int) size
) == -1) {
696 warnx("write error extracting inode %lu, name %s\n",
697 (unsigned long)curfile
.ino
, curfile
.name
);
700 if (!Nflag
&& write(ofile
, buf
, (int) size
) == -1) {
701 warnx("write error extracting inode %lu, name %s\n",
702 (unsigned long)curfile
.ino
, curfile
.name
);
712 * Determine the type of an inode
715 inodetype(dump_ino_t ino
)
719 itp
= inotablookup(ino
);
726 * Allocate and initialize a directory inode entry.
727 * If requested, save its pertinent mode, owner, and time info.
729 static struct inotab
*
731 allocinotab(dump_ino_t ino
, struct new_bsd_inode
*dip
, long seekpt
)
733 allocinotab(dump_ino_t ino
, struct dinode
*dip
, long seekpt
)
737 struct modeinfo node
;
739 itp
= calloc(1, sizeof(struct inotab
));
741 panic("no memory directory table\n");
742 itp
->t_next
= inotab
[INOHASH(ino
)];
743 inotab
[INOHASH(ino
)] = itp
;
745 itp
->t_seekpt
= seekpt
;
750 node
.timep
[0].tv_sec
= dip
->di_atime
.tv_sec
;
751 node
.timep
[0].tv_usec
= dip
->di_atime
.tv_usec
;
752 node
.timep
[1].tv_sec
= dip
->di_mtime
.tv_sec
;
753 node
.timep
[1].tv_usec
= dip
->di_mtime
.tv_usec
;
754 #else /* __linux__ */
755 node
.timep
[0].tv_sec
= dip
->di_atime
;
756 node
.timep
[0].tv_usec
= dip
->di_atimensec
/ 1000;
757 node
.timep
[1].tv_sec
= dip
->di_mtime
;
758 node
.timep
[1].tv_usec
= dip
->di_mtimensec
/ 1000;
759 #endif /* __linux__ */
760 node
.mode
= dip
->di_mode
;
761 node
.flags
= dip
->di_flags
;
762 node
.uid
= dip
->di_uid
;
763 node
.gid
= dip
->di_gid
;
764 if ( fwrite((char *)&node
, 1, sizeof(struct modeinfo
), mf
) != sizeof(struct modeinfo
) )
765 err(1,"cannot write to file %s", modefile
);
770 * Look up an inode in the table of directories
772 static struct inotab
*
773 inotablookup(dump_ino_t ino
)
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
);