2 * Copyright (c) 1983, 1993
3 * The Regents of the University of California. All rights reserved.
4 * (c) UNIX System Laboratories, Inc.
5 * All or some portions of this file are derived from material licensed
6 * to the University of California by American Telephone and Telegraph
7 * Co. or Unix System Laboratories, Inc. and are reproduced herein with
8 * the permission of UNIX System Laboratories, Inc.
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 * 3. All advertising materials mentioning features or use of this software
19 * must display the following acknowledgement:
20 * This product includes software developed by the University of
21 * California, Berkeley and its contributors.
22 * 4. Neither the name of the University nor the names of its contributors
23 * may be used to endorse or promote products derived from this software
24 * without specific prior written permission.
26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
29 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
38 * @(#)dirs.c 8.7 (Berkeley) 5/1/95
39 * $FreeBSD: src/sbin/restore/dirs.c,v 1.14.2.5 2001/10/15 13:44:45 dd Exp $
40 * $DragonFly: src/sbin/restore/dirs.c,v 1.2 2003/06/17 04:27:34 dillon Exp $
43 #include <sys/param.h>
48 #include <ufs/ufs/dinode.h>
49 #include <ufs/ufs/dir.h>
50 #include <protocols/dumprestore.h>
64 * Symbol table of directories read from tape.
67 #define INOHASH(val) (val % HASHSIZE)
69 struct inotab *t_next;
74 static struct inotab *inotab[HASHSIZE];
77 * Information retained about directories.
81 struct timeval timep[2];
89 * Definitions for library routines operating on directories.
92 #define DIRBLKSIZ 1024
97 char dd_buf[DIRBLKSIZ];
101 * Global variables for this file.
104 static FILE *df, *mf;
105 static RST_DIR *dirp;
106 static char dirfile[MAXPATHLEN] = "#"; /* No file */
107 static char modefile[MAXPATHLEN] = "#"; /* No file */
108 static char dot[2] = "."; /* So it can be modified */
111 * Format of old style directories.
116 char d_name[ODIRSIZ];
119 static struct inotab *allocinotab __P((ino_t, struct dinode *, long));
120 static void dcvt __P((struct odirect *, struct direct *));
121 static void flushent __P((void));
122 static struct inotab *inotablookup __P((ino_t));
123 static RST_DIR *opendirfile __P((const char *));
124 static void putdir __P((char *, long));
125 static void putent __P((struct direct *));
126 static void rst_seekdir __P((RST_DIR *, long, long));
127 static long rst_telldir __P((RST_DIR *));
128 static struct direct *searchdir __P((ino_t, char *));
131 * Extract directory contents, building up a directory structure
132 * on disk for extraction by name.
133 * If genmode is requested, save mode, owner, and times for all
134 * directories on the tape.
141 register struct dinode *ip;
143 struct direct nulldir;
147 vprintf(stdout, "Extract directories from tape\n");
148 if ((tmpdir = getenv("TMPDIR")) == NULL || tmpdir[0] == '\0')
150 (void) sprintf(dirfile, "%s/rstdir%d", tmpdir, dumpdate);
151 if (command != 'r' && command != 'R') {
152 (void *) strcat(dirfile, "-XXXXXX");
153 fd = mkstemp(dirfile);
155 fd = open(dirfile, O_RDWR|O_CREAT|O_EXCL, 0666);
156 if (fd == -1 || (df = fdopen(fd, "w")) == NULL) {
159 warn("%s - cannot create directory temporary\nfopen", dirfile);
163 (void) sprintf(modefile, "%s/rstmode%d", tmpdir, dumpdate);
164 if (command != 'r' && command != 'R') {
165 (void *) strcat(modefile, "-XXXXXX");
166 fd = mkstemp(modefile);
168 fd = open(modefile, O_RDWR|O_CREAT|O_EXCL, 0666);
169 if (fd == -1 || (mf = fdopen(fd, "w")) == NULL) {
172 warn("%s - cannot create modefile\nfopen", modefile);
177 nulldir.d_type = DT_DIR;
178 nulldir.d_namlen = 1;
179 (void) strcpy(nulldir.d_name, "/");
180 nulldir.d_reclen = DIRSIZ(0, &nulldir);
182 curfile.name = "<directory file - name unknown>";
183 curfile.action = USING;
185 if (ip == NULL || (ip->di_mode & IFMT) != IFDIR) {
187 dirp = opendirfile(dirfile);
189 fprintf(stderr, "opendirfile: %s\n",
195 panic("Root directory is not on tape\n");
198 itp = allocinotab(curfile.ino, ip, seekpt);
199 getfile(putdir, xtrnull);
202 itp->t_size = seekpt - itp->t_seekpt;
207 * skip over all the directories on the tape
213 while (curfile.dip && (curfile.dip->di_mode & IFMT) == IFDIR) {
219 * Recursively find names and inumbers of all files in subtree
220 * pname and pass them off to be processed.
223 treescan(pname, ino, todo)
226 long (*todo) __P((char *, ino_t, int));
228 register struct inotab *itp;
229 register struct direct *dp;
232 char locname[MAXPATHLEN + 1];
234 itp = inotablookup(ino);
237 * Pname is name of a simple file or an unchanged directory.
239 (void) (*todo)(pname, ino, LEAF);
243 * Pname is a dumped directory name.
245 if ((*todo)(pname, ino, NODE) == FAIL)
248 * begin search through the directory
249 * skipping over "." and ".."
251 (void) strncpy(locname, pname, sizeof(locname) - 1);
252 locname[sizeof(locname) - 1] = '\0';
253 (void) strncat(locname, "/", sizeof(locname) - strlen(locname));
254 namelen = strlen(locname);
255 rst_seekdir(dirp, itp->t_seekpt, itp->t_seekpt);
256 dp = rst_readdir(dirp); /* "." */
257 if (dp != NULL && strcmp(dp->d_name, ".") == 0)
258 dp = rst_readdir(dirp); /* ".." */
260 fprintf(stderr, "Warning: `.' missing from directory %s\n",
262 if (dp != NULL && strcmp(dp->d_name, "..") == 0)
263 dp = rst_readdir(dirp); /* first real entry */
265 fprintf(stderr, "Warning: `..' missing from directory %s\n",
267 bpt = rst_telldir(dirp);
269 * a zero inode signals end of directory
272 locname[namelen] = '\0';
273 if (namelen + dp->d_namlen >= sizeof(locname)) {
274 fprintf(stderr, "%s%s: name exceeds %d char\n",
275 locname, dp->d_name, sizeof(locname) - 1);
277 (void) strncat(locname, dp->d_name, (int)dp->d_namlen);
278 treescan(locname, dp->d_ino, todo);
279 rst_seekdir(dirp, bpt, itp->t_seekpt);
281 dp = rst_readdir(dirp);
282 bpt = rst_telldir(dirp);
287 * Lookup a pathname which is always assumed to start from the ROOTINO.
291 const char *pathname;
295 char *path, *name, buffer[MAXPATHLEN];
297 strcpy(buffer, pathname);
303 while ((name = strsep(&path, "/")) != NULL && *name != '\0') {
304 if ((dp = searchdir(ino, name)) == NULL)
312 * Lookup the requested name in directory inum.
313 * Return its inode number if found, zero if it does not exist.
315 static struct direct *
316 searchdir(inum, name)
320 register struct direct *dp;
321 register struct inotab *itp;
324 itp = inotablookup(inum);
327 rst_seekdir(dirp, itp->t_seekpt, itp->t_seekpt);
330 dp = rst_readdir(dirp);
333 } while (dp->d_namlen != len || strncmp(dp->d_name, name, len) != 0);
338 * Put the directory entries in the directory file
345 struct direct cvtbuf;
346 register struct odirect *odp;
347 struct odirect *eodp;
348 register struct direct *dp;
352 eodp = (struct odirect *)&buf[size];
353 for (odp = (struct odirect *)buf; odp < eodp; odp++)
354 if (odp->d_ino != 0) {
359 for (loc = 0; loc < size; ) {
360 dp = (struct direct *)(buf + loc);
362 swabst((u_char *)"ls", (u_char *) dp);
363 if (oldinofmt && dp->d_ino != 0) {
364 # if BYTE_ORDER == BIG_ENDIAN
366 dp->d_namlen = dp->d_type;
369 dp->d_namlen = dp->d_type;
371 dp->d_type = DT_UNKNOWN;
373 i = DIRBLKSIZ - (loc & (DIRBLKSIZ - 1));
374 if ((dp->d_reclen & 0x3) != 0 ||
376 dp->d_reclen < DIRSIZ(0, dp) ||
377 dp->d_namlen > NAME_MAX) {
378 vprintf(stdout, "Mangled directory: ");
379 if ((dp->d_reclen & 0x3) != 0)
381 "reclen not multiple of 4 ");
382 if (dp->d_reclen < DIRSIZ(0, dp))
384 "reclen less than DIRSIZ (%d < %d) ",
385 dp->d_reclen, DIRSIZ(0, dp));
386 if (dp->d_namlen > NAME_MAX)
388 "reclen name too big (%d > %d) ",
389 dp->d_namlen, NAME_MAX);
390 vprintf(stdout, "\n");
395 if (dp->d_ino != 0) {
403 * These variables are "local" to the following two functions.
405 char dirbuf[DIRBLKSIZ];
410 * add a new directory entry to a file.
416 dp->d_reclen = DIRSIZ(0, dp);
417 if (dirloc + dp->d_reclen > DIRBLKSIZ) {
418 ((struct direct *)(dirbuf + prev))->d_reclen =
420 (void) fwrite(dirbuf, 1, DIRBLKSIZ, df);
423 memmove(dirbuf + dirloc, dp, (long)dp->d_reclen);
425 dirloc += dp->d_reclen;
429 * flush out a directory that is finished.
434 ((struct direct *)(dirbuf + prev))->d_reclen = DIRBLKSIZ - prev;
435 (void) fwrite(dirbuf, (int)dirloc, 1, df);
442 register struct odirect *odp;
443 register struct direct *ndp;
446 memset(ndp, 0, (long)(sizeof *ndp));
447 ndp->d_ino = odp->d_ino;
448 ndp->d_type = DT_UNKNOWN;
449 (void) strncpy(ndp->d_name, odp->d_name, ODIRSIZ);
450 ndp->d_namlen = strlen(ndp->d_name);
451 ndp->d_reclen = DIRSIZ(0, ndp);
455 * Seek to an entry in a directory.
456 * Only values returned by rst_telldir should be passed to rst_seekdir.
457 * This routine handles many directories in a single file.
458 * It takes the base of the directory in the file, plus
459 * the desired seek offset into it.
462 rst_seekdir(dirp, loc, base)
463 register RST_DIR *dirp;
467 if (loc == rst_telldir(dirp))
471 fprintf(stderr, "bad seek pointer to rst_seekdir %ld\n", loc);
472 (void) lseek(dirp->dd_fd, base + (loc & ~(DIRBLKSIZ - 1)), SEEK_SET);
473 dirp->dd_loc = loc & (DIRBLKSIZ - 1);
474 if (dirp->dd_loc != 0)
475 dirp->dd_size = read(dirp->dd_fd, dirp->dd_buf, DIRBLKSIZ);
479 * get next entry in a directory.
483 register RST_DIR *dirp;
485 register struct direct *dp;
488 if (dirp->dd_loc == 0) {
489 dirp->dd_size = read(dirp->dd_fd, dirp->dd_buf,
491 if (dirp->dd_size <= 0) {
492 dprintf(stderr, "error reading directory\n");
496 if (dirp->dd_loc >= dirp->dd_size) {
500 dp = (struct direct *)(dirp->dd_buf + dirp->dd_loc);
501 if (dp->d_reclen == 0 ||
502 dp->d_reclen > DIRBLKSIZ + 1 - dirp->dd_loc) {
503 dprintf(stderr, "corrupted directory: bad reclen %d\n",
507 dirp->dd_loc += dp->d_reclen;
508 if (dp->d_ino == 0 && strcmp(dp->d_name, "/") == 0)
510 if (dp->d_ino >= maxino) {
511 dprintf(stderr, "corrupted directory: bad inum %d\n",
520 * Simulate the opening of a directory
530 if ((ino = dirlookup(name)) > 0 &&
531 (itp = inotablookup(ino)) != NULL) {
532 dirp = opendirfile(dirfile);
533 rst_seekdir(dirp, itp->t_seekpt, itp->t_seekpt);
540 * In our case, there is nothing to do when closing a directory.
547 (void)close(dirp->dd_fd);
553 * Simulate finding the current offset in the directory.
559 return ((long)lseek(dirp->dd_fd,
560 (off_t)0, SEEK_CUR) - dirp->dd_size + dirp->dd_loc);
564 * Open a directory file.
570 register RST_DIR *dirp;
573 if ((fd = open(name, O_RDONLY)) == -1)
575 if ((dirp = malloc(sizeof(RST_DIR))) == NULL) {
585 * Set the mode, owner, and times for all new or changed directories
592 struct modeinfo node;
597 vprintf(stdout, "Set directory mode, owner, and times.\n");
598 if ((tmpdir = getenv("TMPDIR")) == NULL || tmpdir[0] == '\0')
600 if (command == 'r' || command == 'R')
601 (void) sprintf(modefile, "%s/rstmode%d", tmpdir, dumpdate);
602 if (modefile[0] == '#') {
603 panic("modefile not defined\n");
604 fprintf(stderr, "directory mode, owner, and times not set\n");
607 mf = fopen(modefile, "r");
609 fprintf(stderr, "fopen: %s\n", strerror(errno));
610 fprintf(stderr, "cannot open mode file %s\n", modefile);
611 fprintf(stderr, "directory mode, owner, and times not set\n");
616 (void) fread((char *)&node, 1, sizeof(struct modeinfo), mf);
619 ep = lookupino(node.ino);
620 if (command == 'i' || command == 'x') {
623 if ((flags & FORCE) == 0 && ep->e_flags & EXISTED) {
627 if (node.ino == ROOTINO &&
628 reply("set owner/mode for '.'") == FAIL)
632 panic("cannot find directory inode %d\n", node.ino);
636 (void) chown(cp, node.uid, node.gid);
637 (void) chmod(cp, node.mode);
638 utimes(cp, node.timep);
639 (void) chflags(cp, node.flags);
645 panic("error setting directory modes\n");
650 * Generate a literal copy of a directory.
653 genliteraldir(name, ino)
657 register struct inotab *itp;
658 int ofile, dp, i, size;
661 itp = inotablookup(ino);
663 panic("Cannot find directory inode %d named %s\n", ino, name);
664 if ((ofile = open(name, O_WRONLY | O_CREAT | O_TRUNC, 0666)) < 0) {
665 fprintf(stderr, "%s: ", name);
666 (void) fflush(stderr);
667 fprintf(stderr, "cannot create file: %s\n", strerror(errno));
670 rst_seekdir(dirp, itp->t_seekpt, itp->t_seekpt);
671 dp = dup(dirp->dd_fd);
672 for (i = itp->t_size; i > 0; i -= BUFSIZ) {
673 size = i < BUFSIZ ? i : BUFSIZ;
674 if (read(dp, buf, (int) size) == -1) {
676 "write error extracting inode %d, name %s\n",
677 curfile.ino, curfile.name);
678 fprintf(stderr, "read: %s\n", strerror(errno));
681 if (!Nflag && write(ofile, buf, (int) size) == -1) {
683 "write error extracting inode %d, name %s\n",
684 curfile.ino, curfile.name);
685 fprintf(stderr, "write: %s\n", strerror(errno));
695 * Determine the type of an inode
703 itp = inotablookup(ino);
710 * Allocate and initialize a directory inode entry.
711 * If requested, save its pertinent mode, owner, and time info.
713 static struct inotab *
714 allocinotab(ino, dip, seekpt)
719 register struct inotab *itp;
720 struct modeinfo node;
722 itp = calloc(1, sizeof(struct inotab));
724 panic("no memory directory table\n");
725 itp->t_next = inotab[INOHASH(ino)];
726 inotab[INOHASH(ino)] = itp;
728 itp->t_seekpt = seekpt;
732 node.timep[0].tv_sec = dip->di_atime;
733 node.timep[0].tv_usec = dip->di_atimensec / 1000;
734 node.timep[1].tv_sec = dip->di_mtime;
735 node.timep[1].tv_usec = dip->di_mtimensec / 1000;
736 node.mode = dip->di_mode;
737 node.flags = dip->di_flags;
738 node.uid = dip->di_uid;
739 node.gid = dip->di_gid;
740 (void) fwrite((char *)&node, 1, sizeof(struct modeinfo), mf);
745 * Look up an inode in the table of directories
747 static struct inotab *
751 register struct inotab *itp;
753 for (itp = inotab[INOHASH(ino)]; itp != NULL; itp = itp->t_next)
754 if (itp->t_ino == ino)
768 if (modefile[0] != '#')
769 (void) unlink(modefile);
770 if (dirfile[0] != '#')
771 (void) unlink(dirfile);