]>
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 1.12 2000/12/05 15:43:49 stelian Exp $";
52 #include <sys/param.h>
57 #include <linux/ext2_fs.h>
58 #include <bsdcompat.h>
60 #include <ufs/ufs/dinode.h>
61 #include <ufs/ufs/dir.h>
62 #endif /* __linux__ */
63 #include <protocols/dumprestore.h>
65 #include <compaterr.h>
75 #include <machine/endian.h>
78 #include "pathnames.h"
83 * Symbol table of directories read from tape.
86 #define INOHASH(val) (val % HASHSIZE)
88 struct inotab
*t_next
;
93 static struct inotab
*inotab
[HASHSIZE
];
96 * Information retained about directories.
100 struct timeval timep
[2];
108 * Definitions for library routines operating on directories.
111 #define DIRBLKSIZ 1024
116 char dd_buf
[DIRBLKSIZ
];
120 * Global variables for this file.
123 static FILE *df
, *mf
;
124 static RST_DIR
*dirp
;
125 static char dirfile
[MAXPATHLEN
] = "#"; /* No file */
126 static char modefile
[MAXPATHLEN
] = "#"; /* No file */
127 static char dot
[2] = "."; /* So it can be modified */
130 * Format of old style directories.
135 char d_name
[ODIRSIZ
];
139 static struct inotab
*allocinotab
__P((ino_t
, struct new_bsd_inode
*, long));
141 static struct inotab
*allocinotab
__P((ino_t
, struct dinode
*, long));
143 static void dcvt
__P((struct odirect
*, struct direct
*));
144 static void flushent
__P((void));
145 static struct inotab
*inotablookup
__P((ino_t
));
146 static RST_DIR
*opendirfile
__P((const char *));
147 static void putdir
__P((char *, size_t));
148 static void putent
__P((struct direct
*));
149 static void rst_seekdir
__P((RST_DIR
*, long, long));
150 static long rst_telldir
__P((RST_DIR
*));
151 static struct direct
*searchdir
__P((ino_t
, char *));
154 * Extract directory contents, building up a directory structure
155 * on disk for extraction by name.
156 * If genmode is requested, save mode, owner, and times for all
157 * directories on the tape.
160 extractdirs(int genmode
)
164 register struct new_bsd_inode
*ip
;
166 register struct dinode
*ip
;
169 struct direct nulldir
;
172 Vprintf(stdout
, "Extract directories from tape\n");
173 (void) snprintf(dirfile
, sizeof(dirfile
), "%s/rstdir%ld", tmpdir
,
175 if (command
!= 'r' && command
!= 'R') {
176 (void) strncat(dirfile
, "-XXXXXX",
177 sizeof(dirfile
) - strlen(dirfile
));
178 fd
= mkstemp(dirfile
);
180 fd
= open(dirfile
, O_RDWR
|O_CREAT
|O_EXCL
, 0666);
181 if (fd
== -1 || (df
= fdopen(fd
, "w")) == NULL
) {
184 err(1, "cannot create directory temporary %s", dirfile
);
187 (void) snprintf(modefile
, sizeof(modefile
), "%s/rstmode%ld", tmpdir
, (long)dumpdate
);
188 if (command
!= 'r' && command
!= 'R') {
189 (void) strncat(modefile
, "-XXXXXX",
190 sizeof(modefile
) - strlen(modefile
));
191 fd
= mkstemp(modefile
);
193 fd
= open(modefile
, O_RDWR
|O_CREAT
|O_EXCL
, 0666);
194 if (fd
== -1 || (mf
= fdopen(fd
, "w")) == NULL
) {
197 err(1, "cannot create modefile %s", modefile
);
201 nulldir
.d_type
= DT_DIR
;
202 nulldir
.d_namlen
= 1;
203 nulldir
.d_name
[0] = '/';
204 nulldir
.d_name
[1] = '\0';
205 nulldir
.d_reclen
= DIRSIZ(0, &nulldir
);
207 curfile
.name
= "<directory file - name unknown>";
208 curfile
.action
= USING
;
210 if (ip
== NULL
|| (ip
->di_mode
& IFMT
) != IFDIR
) {
211 if ( fclose(df
) == EOF
)
212 err(1, "cannot write to file %s", dirfile
);
213 dirp
= opendirfile(dirfile
);
216 if (mf
!= NULL
&& fclose(mf
) == EOF
)
217 err(1, "cannot write to file %s", dirfile
);
220 panic("Root directory is not on tape\n");
223 itp
= allocinotab(curfile
.ino
, ip
, seekpt
);
224 getfile(putdir
, xtrnull
);
227 itp
->t_size
= seekpt
- itp
->t_seekpt
;
232 * skip over all the directories on the tape
238 while (curfile
.dip
&& (curfile
.dip
->di_mode
& IFMT
) == IFDIR
) {
244 * Recursively find names and inumbers of all files in subtree
245 * pname and pass them off to be processed.
248 treescan(char *pname
, ino_t ino
, long (*todo
) __P((char *, ino_t
, int)))
250 register struct inotab
*itp
;
251 register struct direct
*dp
;
254 char locname
[MAXPATHLEN
+ 1];
256 itp
= inotablookup(ino
);
259 * Pname is name of a simple file or an unchanged directory.
261 (void) (*todo
)(pname
, ino
, LEAF
);
265 * Pname is a dumped directory name.
267 if ((*todo
)(pname
, ino
, NODE
) == FAIL
)
270 * begin search through the directory
271 * skipping over "." and ".."
273 namelen
= snprintf(locname
, sizeof(locname
), "%s/", pname
);
274 if (namelen
>= sizeof(locname
))
275 namelen
= sizeof(locname
) - 1;
276 rst_seekdir(dirp
, itp
->t_seekpt
, itp
->t_seekpt
);
277 dp
= rst_readdir(dirp
); /* "." */
278 if (dp
!= NULL
&& strcmp(dp
->d_name
, ".") == 0)
279 dp
= rst_readdir(dirp
); /* ".." */
281 fprintf(stderr
, "Warning: `.' missing from directory %s\n",
283 if (dp
!= NULL
&& strcmp(dp
->d_name
, "..") == 0)
284 dp
= rst_readdir(dirp
); /* first real entry */
286 fprintf(stderr
, "Warning: `..' missing from directory %s\n",
288 bpt
= rst_telldir(dirp
);
290 * a zero inode signals end of directory
293 locname
[namelen
] = '\0';
294 if (namelen
+ dp
->d_namlen
>= sizeof(locname
)) {
295 fprintf(stderr
, "%s%s: name exceeds %ld char\n",
296 locname
, dp
->d_name
, (long)sizeof(locname
) - 1);
298 (void) strncat(locname
, dp
->d_name
, (int)dp
->d_namlen
);
299 treescan(locname
, dp
->d_ino
, todo
);
300 rst_seekdir(dirp
, bpt
, itp
->t_seekpt
);
302 dp
= rst_readdir(dirp
);
303 bpt
= rst_telldir(dirp
);
308 * Lookup a pathname which is always assumed to start from the ROOTINO.
311 pathsearch(const char *pathname
)
315 char *path
, *name
, buffer
[MAXPATHLEN
];
317 strcpy(buffer
, pathname
);
323 while ((name
= strsep(&path
, "/")) != NULL
&& *name
/* != NULL */) {
324 if ((dp
= searchdir(ino
, name
)) == NULL
)
332 * Lookup the requested name in directory inum.
333 * Return its inode number if found, zero if it does not exist.
335 static struct direct
*
336 searchdir(ino_t inum
, char *name
)
338 register struct direct
*dp
;
339 register struct inotab
*itp
;
342 itp
= inotablookup(inum
);
345 rst_seekdir(dirp
, itp
->t_seekpt
, itp
->t_seekpt
);
348 dp
= rst_readdir(dirp
);
351 } while (dp
->d_namlen
!= len
|| strncmp(dp
->d_name
, name
, len
) != 0);
356 * Put the directory entries in the directory file
359 putdir(char *buf
, size_t size
)
361 struct direct cvtbuf
;
362 register struct odirect
*odp
;
363 struct odirect
*eodp
;
364 register struct direct
*dp
;
368 eodp
= (struct odirect
*)&buf
[size
];
369 for (odp
= (struct odirect
*)buf
; odp
< eodp
; odp
++)
370 if (odp
->d_ino
!= 0) {
375 for (loc
= 0; loc
< size
; ) {
376 dp
= (struct direct
*)(buf
+ loc
);
378 printf ("reclen = %d, namlen = %d, type = %d\n",
379 dp
->d_reclen
, dp
->d_namlen
, dp
->d_type
);
382 swabst((u_char
*)"is", (u_char
*) dp
);
383 if (oldinofmt
&& dp
->d_ino
!= 0) {
384 # if BYTE_ORDER == BIG_ENDIAN
386 dp
->d_namlen
= dp
->d_type
;
389 dp
->d_namlen
= dp
->d_type
;
391 dp
->d_type
= DT_UNKNOWN
;
394 printf ("reclen = %d, namlen = %d, type = %d\n",
395 dp
->d_reclen
, dp
->d_namlen
, dp
->d_type
);
397 i
= DIRBLKSIZ
- (loc
& (DIRBLKSIZ
- 1));
398 if ((dp
->d_reclen
& 0x3) != 0 ||
400 dp
->d_reclen
< DIRSIZ(0, dp
) ||
401 dp
->d_namlen
> MAXNAMLEN
) {
402 Vprintf(stdout
, "Mangled directory: ");
403 if ((dp
->d_reclen
& 0x3) != 0)
405 "reclen not multiple of 4 ");
406 if (dp
->d_reclen
< DIRSIZ(0, dp
))
408 "reclen less than DIRSIZ (%d < %d) ",
409 dp
->d_reclen
, DIRSIZ(0, dp
));
410 if (dp
->d_namlen
> MAXNAMLEN
)
412 "reclen name too big (%d > %d) ",
413 dp
->d_namlen
, MAXNAMLEN
);
414 Vprintf(stdout
, "\n");
419 if (dp
->d_ino
!= 0) {
427 * These variables are "local" to the following two functions.
429 char dirbuf
[DIRBLKSIZ
];
434 * add a new directory entry to a file.
437 putent(struct direct
*dp
)
439 dp
->d_reclen
= DIRSIZ(0, dp
);
440 if (dirloc
+ dp
->d_reclen
> DIRBLKSIZ
) {
441 ((struct direct
*)(dirbuf
+ prev
))->d_reclen
=
443 if ( fwrite(dirbuf
, 1, DIRBLKSIZ
, df
) != DIRBLKSIZ
)
444 err(1,"cannot write to file %s", dirfile
);
447 memmove(dirbuf
+ dirloc
, dp
, (size_t)dp
->d_reclen
);
449 dirloc
+= dp
->d_reclen
;
453 * flush out a directory that is finished.
458 ((struct direct
*)(dirbuf
+ prev
))->d_reclen
= DIRBLKSIZ
- prev
;
459 if ( fwrite(dirbuf
, (int)dirloc
, 1, df
) != 1 )
460 err(1, "cannot write to file %s", dirfile
);
463 err(1, "cannot write to file %s", dirfile
);
468 dcvt(struct odirect
*odp
, struct direct
*ndp
)
471 memset(ndp
, 0, (size_t)(sizeof *ndp
));
472 ndp
->d_ino
= odp
->d_ino
;
473 ndp
->d_type
= DT_UNKNOWN
;
474 (void) strncpy(ndp
->d_name
, odp
->d_name
, ODIRSIZ
);
475 ndp
->d_namlen
= strlen(ndp
->d_name
);
476 ndp
->d_reclen
= DIRSIZ(0, ndp
);
480 * Seek to an entry in a directory.
481 * Only values returned by rst_telldir should be passed to rst_seekdir.
482 * This routine handles many directories in a single file.
483 * It takes the base of the directory in the file, plus
484 * the desired seek offset into it.
487 rst_seekdir(RST_DIR
*dirp
, long loc
, long base
)
490 if (loc
== rst_telldir(dirp
))
494 fprintf(stderr
, "bad seek pointer to rst_seekdir %ld\n", loc
);
495 (void) lseek(dirp
->dd_fd
, base
+ (loc
& ~(DIRBLKSIZ
- 1)), SEEK_SET
);
496 dirp
->dd_loc
= loc
& (DIRBLKSIZ
- 1);
497 if (dirp
->dd_loc
!= 0)
498 dirp
->dd_size
= read(dirp
->dd_fd
, dirp
->dd_buf
, DIRBLKSIZ
);
502 * get next entry in a directory.
505 rst_readdir(RST_DIR
*dirp
)
507 register struct direct
*dp
;
510 if (dirp
->dd_loc
== 0) {
511 dirp
->dd_size
= read(dirp
->dd_fd
, dirp
->dd_buf
,
513 if (dirp
->dd_size
<= 0) {
514 Dprintf(stderr
, "error reading directory\n");
518 if (dirp
->dd_loc
>= dirp
->dd_size
) {
522 dp
= (struct direct
*)(dirp
->dd_buf
+ dirp
->dd_loc
);
523 if (dp
->d_reclen
== 0 ||
524 dp
->d_reclen
> DIRBLKSIZ
+ 1 - dirp
->dd_loc
) {
525 Dprintf(stderr
, "corrupted directory: bad reclen %d\n",
529 dirp
->dd_loc
+= dp
->d_reclen
;
530 if (dp
->d_ino
== 0 && strcmp(dp
->d_name
, "/") == 0)
532 if (dp
->d_ino
>= maxino
) {
533 Dprintf(stderr
, "corrupted directory: bad inum %d\n",
542 * Simulate the opening of a directory
545 rst_opendir(const char *name
)
551 if ((ino
= dirlookup(name
)) > 0 &&
552 (itp
= inotablookup(ino
)) != NULL
) {
553 dirp
= opendirfile(dirfile
);
554 rst_seekdir(dirp
, itp
->t_seekpt
, itp
->t_seekpt
);
561 * In our case, there is nothing to do when closing a directory.
564 rst_closedir(RST_DIR
*dirp
)
567 (void)close(dirp
->dd_fd
);
573 * Simulate finding the current offset in the directory.
576 rst_telldir(RST_DIR
*dirp
)
578 return ((long)lseek(dirp
->dd_fd
,
579 (off_t
)0, SEEK_CUR
) - dirp
->dd_size
+ dirp
->dd_loc
);
583 * Open a directory file.
586 opendirfile(const char *name
)
588 register RST_DIR
*dirp
;
591 if ((fd
= open(name
, O_RDONLY
)) == -1)
593 if ((dirp
= malloc(sizeof(RST_DIR
))) == NULL
) {
603 * Set the mode, owner, and times for all new or changed directories
606 setdirmodes(int flags
)
609 struct modeinfo node
;
613 Vprintf(stdout
, "Set directory mode, owner, and times.\n");
614 if (command
== 'r' || command
== 'R')
615 (void) snprintf(modefile
, sizeof(modefile
), "%s/rstmode%lu", tmpdir
, (long)dumpdate
);
616 if (modefile
[0] == '#') {
617 panic("modefile not defined\n");
618 fprintf(stderr
, "directory mode, owner, and times not set\n");
621 mf
= fopen(modefile
, "r");
624 fprintf(stderr
, "cannot open mode file %s\n", modefile
);
625 fprintf(stderr
, "directory mode, owner, and times not set\n");
630 (void) fread((char *)&node
, 1, sizeof(struct modeinfo
), mf
);
633 ep
= lookupino(node
.ino
);
634 if (command
== 'i' || command
== 'x') {
637 if ((flags
& FORCE
) == 0 && ep
->e_flags
& EXISTED
) {
641 if (node
.ino
== ROOTINO
&&
642 reply("set owner/mode for '.'") == FAIL
)
646 panic("cannot find directory inode %d\n", node
.ino
);
649 (void) chown(cp
, node
.uid
, node
.gid
);
650 (void) chmod(cp
, node
.mode
);
653 (void) fsetflags(cp
, node
.flags
);
655 (void) chflags(cp
, node
.flags
);
657 utimes(cp
, node
.timep
);
662 panic("error setting directory modes\n");
667 * Generate a literal copy of a directory.
670 genliteraldir(char *name
, ino_t ino
)
672 register struct inotab
*itp
;
673 int ofile
, dp
, i
, size
;
676 itp
= inotablookup(ino
);
678 panic("Cannot find directory inode %d named %s\n", ino
, name
);
679 if ((ofile
= open(name
, O_WRONLY
| O_CREAT
| O_TRUNC
, 0666)) < 0) {
680 warn("%s: cannot create file\n", name
);
683 rst_seekdir(dirp
, itp
->t_seekpt
, itp
->t_seekpt
);
684 dp
= dup(dirp
->dd_fd
);
685 for (i
= itp
->t_size
; i
> 0; i
-= BUFSIZ
) {
686 size
= i
< BUFSIZ
? i
: BUFSIZ
;
687 if (read(dp
, buf
, (int) size
) == -1) {
688 warnx("write error extracting inode %lu, name %s\n",
689 (unsigned long)curfile
.ino
, curfile
.name
);
692 if (!Nflag
&& write(ofile
, buf
, (int) size
) == -1) {
693 warnx("write error extracting inode %lu, name %s\n",
694 (unsigned long)curfile
.ino
, curfile
.name
);
704 * Determine the type of an inode
711 itp
= inotablookup(ino
);
718 * Allocate and initialize a directory inode entry.
719 * If requested, save its pertinent mode, owner, and time info.
721 static struct inotab
*
723 allocinotab(ino_t ino
, struct new_bsd_inode
*dip
, long seekpt
)
725 allocinotab(ino_t ino
, struct dinode
*dip
, long seekpt
)
728 register struct inotab
*itp
;
729 struct modeinfo node
;
731 itp
= calloc(1, sizeof(struct inotab
));
733 panic("no memory directory table\n");
734 itp
->t_next
= inotab
[INOHASH(ino
)];
735 inotab
[INOHASH(ino
)] = itp
;
737 itp
->t_seekpt
= seekpt
;
742 node
.timep
[0].tv_sec
= dip
->di_atime
.tv_sec
;
743 node
.timep
[0].tv_usec
= dip
->di_atime
.tv_usec
;
744 node
.timep
[1].tv_sec
= dip
->di_mtime
.tv_sec
;
745 node
.timep
[1].tv_usec
= dip
->di_mtime
.tv_usec
;
746 #else /* __linux__ */
747 node
.timep
[0].tv_sec
= dip
->di_atime
;
748 node
.timep
[0].tv_usec
= dip
->di_atimensec
/ 1000;
749 node
.timep
[1].tv_sec
= dip
->di_mtime
;
750 node
.timep
[1].tv_usec
= dip
->di_mtimensec
/ 1000;
751 #endif /* __linux__ */
752 node
.mode
= dip
->di_mode
;
753 node
.flags
= dip
->di_flags
;
754 node
.uid
= dip
->di_uid
;
755 node
.gid
= dip
->di_gid
;
756 if ( fwrite((char *)&node
, 1, sizeof(struct modeinfo
), mf
) != sizeof(struct modeinfo
) )
757 err(1,"cannot write to file %s", modefile
);
762 * Look up an inode in the table of directories
764 static struct inotab
*
765 inotablookup(ino_t ino
)
767 register struct inotab
*itp
;
769 for (itp
= inotab
[INOHASH(ino
)]; itp
!= NULL
; itp
= itp
->t_next
)
770 if (itp
->t_ino
== ino
)
782 if (modefile
[0] != '#')
783 (void) unlink(modefile
);
784 if (dirfile
[0] != '#')
785 (void) unlink(dirfile
);