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 1.18 2002/02/04 11:18:46 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 >= 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 >= 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 < 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 dp->d_type = DT_UNKNOWN;
403 printf ("reclen = %d, namlen = %d, type = %d\n",
404 dp->d_reclen, dp->d_namlen, dp->d_type);
406 i = DIRBLKSIZ - (loc & (DIRBLKSIZ - 1));
407 if ((dp->d_reclen & 0x3) != 0 ||
409 dp->d_reclen < DIRSIZ(0, dp) ||
410 dp->d_namlen > MAXNAMLEN) {
411 Vprintf(stdout, "Mangled directory: ");
412 if ((dp->d_reclen & 0x3) != 0)
414 "reclen not multiple of 4 ");
415 if (dp->d_reclen < DIRSIZ(0, dp))
417 "reclen less than DIRSIZ (%d < %d) ",
418 dp->d_reclen, DIRSIZ(0, dp));
419 if (dp->d_namlen > MAXNAMLEN)
421 "reclen name too big (%d > %d) ",
422 dp->d_namlen, MAXNAMLEN);
423 Vprintf(stdout, "\n");
428 if (dp->d_ino != 0) {
436 * These variables are "local" to the following two functions.
438 static char dirbuf[DIRBLKSIZ];
439 static long dirloc = 0;
440 static long prev = 0;
443 * add a new directory entry to a file.
446 putent(struct direct *dp)
448 dp->d_reclen = DIRSIZ(0, dp);
449 if (dirloc + dp->d_reclen > DIRBLKSIZ) {
450 ((struct direct *)(dirbuf + prev))->d_reclen =
452 if ( fwrite(dirbuf, 1, DIRBLKSIZ, df) != DIRBLKSIZ )
453 err(1,"cannot write to file %s", dirfile);
456 memmove(dirbuf + dirloc, dp, (size_t)dp->d_reclen);
458 dirloc += dp->d_reclen;
462 * flush out a directory that is finished.
467 ((struct direct *)(dirbuf + prev))->d_reclen = DIRBLKSIZ - prev;
468 if ( fwrite(dirbuf, (int)dirloc, 1, df) != 1 )
469 err(1, "cannot write to file %s", dirfile);
472 err(1, "cannot write to file %s", dirfile);
477 dcvt(struct odirect *odp, struct direct *ndp)
480 memset(ndp, 0, (size_t)(sizeof *ndp));
481 ndp->d_ino = odp->d_ino;
482 ndp->d_type = DT_UNKNOWN;
483 (void) strncpy(ndp->d_name, odp->d_name, ODIRSIZ);
484 ndp->d_namlen = strlen(ndp->d_name);
485 ndp->d_reclen = DIRSIZ(0, ndp);
489 * Seek to an entry in a directory.
490 * Only values returned by rst_telldir should be passed to rst_seekdir.
491 * This routine handles many directories in a single file.
492 * It takes the base of the directory in the file, plus
493 * the desired seek offset into it.
496 rst_seekdir(RST_DIR *dirp, long loc, long base)
499 if (loc == rst_telldir(dirp))
503 fprintf(stderr, "bad seek pointer to rst_seekdir %ld\n", loc);
504 (void) lseek(dirp->dd_fd, base + (loc & ~(DIRBLKSIZ - 1)), SEEK_SET);
505 dirp->dd_loc = loc & (DIRBLKSIZ - 1);
506 if (dirp->dd_loc != 0)
507 dirp->dd_size = read(dirp->dd_fd, dirp->dd_buf, DIRBLKSIZ);
511 * get next entry in a directory.
514 rst_readdir(RST_DIR *dirp)
519 if (dirp->dd_loc == 0) {
520 dirp->dd_size = read(dirp->dd_fd, dirp->dd_buf,
522 if (dirp->dd_size <= 0) {
523 Dprintf(stderr, "error reading directory\n");
527 if (dirp->dd_loc >= dirp->dd_size) {
531 dp = (struct direct *)(dirp->dd_buf + dirp->dd_loc);
532 if (dp->d_reclen == 0 ||
533 dp->d_reclen > DIRBLKSIZ + 1 - dirp->dd_loc) {
534 Dprintf(stderr, "corrupted directory: bad reclen %d\n",
538 dirp->dd_loc += dp->d_reclen;
539 if (dp->d_ino == 0 && strcmp(dp->d_name, "/") == 0)
541 if (dp->d_ino >= maxino) {
542 Dprintf(stderr, "corrupted directory: bad inum %d\n",
551 * Simulate the opening of a directory
554 rst_opendir(const char *name)
560 if ((ino = dirlookup(name)) > 0 &&
561 (itp = inotablookup(ino)) != NULL) {
562 dirp = opendirfile(dirfile);
563 rst_seekdir(dirp, itp->t_seekpt, itp->t_seekpt);
570 * In our case, there is nothing to do when closing a directory.
573 rst_closedir(RST_DIR *dirp)
576 (void)close(dirp->dd_fd);
582 * Simulate finding the current offset in the directory.
585 rst_telldir(RST_DIR *dirp)
587 return ((long)lseek(dirp->dd_fd,
588 (off_t)0, SEEK_CUR) - dirp->dd_size + dirp->dd_loc);
592 * Open a directory file.
595 opendirfile(const char *name)
600 if ((fd = open(name, O_RDONLY)) == -1)
602 if ((dirp = malloc(sizeof(RST_DIR))) == NULL) {
612 * Set the mode, owner, and times for all new or changed directories
615 setdirmodes(int flags)
618 struct modeinfo node;
622 Vprintf(stdout, "Set directory mode, owner, and times.\n");
623 if (command == 'r' || command == 'R')
624 (void) snprintf(modefile, sizeof(modefile), "%s/rstmode%lu", tmpdir, (long)dumpdate);
625 if (modefile[0] == '#') {
626 panic("modefile not defined\n");
627 fprintf(stderr, "directory mode, owner, and times not set\n");
630 mf = fopen(modefile, "r");
633 fprintf(stderr, "cannot open mode file %s\n", modefile);
634 fprintf(stderr, "directory mode, owner, and times not set\n");
639 (void) fread((char *)&node, 1, sizeof(struct modeinfo), mf);
642 ep = lookupino(node.ino);
643 if (command == 'i' || command == 'x') {
646 if ((flags & FORCE) == 0 && ep->e_flags & EXISTED) {
650 if (node.ino == ROOTINO &&
651 reply("set owner/mode for '.'") == FAIL)
655 panic("cannot find directory inode %d\n", node.ino);
658 (void) chown(cp, node.uid, node.gid);
659 (void) chmod(cp, node.mode);
662 (void) fsetflags(cp, node.flags);
664 (void) chflags(cp, node.flags);
666 utimes(cp, node.timep);
671 panic("error setting directory modes\n");
676 * Generate a literal copy of a directory.
679 genliteraldir(char *name, dump_ino_t ino)
682 int ofile, dp, i, size;
685 itp = inotablookup(ino);
687 panic("Cannot find directory inode %d named %s\n", ino, name);
688 if ((ofile = open(name, O_WRONLY | O_CREAT | O_TRUNC, 0666)) < 0) {
689 warn("%s: cannot create file\n", name);
692 rst_seekdir(dirp, itp->t_seekpt, itp->t_seekpt);
693 dp = dup(dirp->dd_fd);
694 for (i = itp->t_size; i > 0; i -= BUFSIZ) {
695 size = i < BUFSIZ ? i : BUFSIZ;
696 if (read(dp, buf, (int) size) == -1) {
697 warnx("write error extracting inode %lu, name %s\n",
698 (unsigned long)curfile.ino, curfile.name);
701 if (!Nflag && write(ofile, buf, (int) size) == -1) {
702 warnx("write error extracting inode %lu, name %s\n",
703 (unsigned long)curfile.ino, curfile.name);
713 * Determine the type of an inode
716 inodetype(dump_ino_t ino)
720 itp = inotablookup(ino);
727 * Allocate and initialize a directory inode entry.
728 * If requested, save its pertinent mode, owner, and time info.
730 static struct inotab *
732 allocinotab(dump_ino_t ino, struct new_bsd_inode *dip, long seekpt)
734 allocinotab(dump_ino_t ino, struct dinode *dip, long seekpt)
738 struct modeinfo node;
740 itp = calloc(1, sizeof(struct inotab));
742 panic("no memory directory table\n");
743 itp->t_next = inotab[INOHASH(ino)];
744 inotab[INOHASH(ino)] = itp;
746 itp->t_seekpt = seekpt;
751 node.timep[0].tv_sec = dip->di_atime.tv_sec;
752 node.timep[0].tv_usec = dip->di_atime.tv_usec;
753 node.timep[1].tv_sec = dip->di_mtime.tv_sec;
754 node.timep[1].tv_usec = dip->di_mtime.tv_usec;
755 #else /* __linux__ */
756 node.timep[0].tv_sec = dip->di_atime;
757 node.timep[0].tv_usec = dip->di_atimensec / 1000;
758 node.timep[1].tv_sec = dip->di_mtime;
759 node.timep[1].tv_usec = dip->di_mtimensec / 1000;
760 #endif /* __linux__ */
761 node.mode = dip->di_mode;
762 node.flags = dip->di_flags;
763 node.uid = dip->di_uid;
764 node.gid = dip->di_gid;
765 if ( fwrite((char *)&node, 1, sizeof(struct modeinfo), mf) != sizeof(struct modeinfo) )
766 err(1,"cannot write to file %s", modefile);
771 * Look up an inode in the table of directories
773 static struct inotab *
774 inotablookup(dump_ino_t ino)
778 for (itp = inotab[INOHASH(ino)]; itp != NULL; itp = itp->t_next)
779 if (itp->t_ino == ino)
791 if (modefile[0] != '#')
792 (void) unlink(modefile);
793 if (dirfile[0] != '#')
794 (void) unlink(dirfile);