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);