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.
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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 * 4. Neither the name of the University nor the names of its contributors
19 * may be used to endorse or promote products derived from this software
20 * without specific prior written permission.
22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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37 static char sccsid[] = "@(#)dirs.c 8.7 (Berkeley) 5/1/95";
39 static const char rcsid[] =
43 #include <sys/param.h>
48 #include <ufs/ufs/dinode.h>
49 #include <ufs/ufs/dir.h>
50 #include <protocols/dumprestore.h>
65 * Symbol table of directories read from tape.
68 #define INOHASH(val) (val % HASHSIZE)
70 struct inotab *t_next;
75 static struct inotab *inotab[HASHSIZE];
78 * Information retained about directories.
82 struct timeval ctimep[2];
83 struct timeval mtimep[2];
92 * Definitions for library routines operating on directories.
95 #define DIRBLKSIZ 1024
100 char dd_buf[DIRBLKSIZ];
104 * Global variables for this file.
107 static FILE *df, *mf;
108 static RST_DIR *dirp;
109 static char dirfile[MAXPATHLEN] = "#"; /* No file */
110 static char modefile[MAXPATHLEN] = "#"; /* No file */
111 static char dot[2] = "."; /* So it can be modified */
113 static struct inotab *allocinotab(struct context *, long);
114 static void flushent(void);
115 static struct inotab *inotablookup(ino_t);
116 static RST_DIR *opendirfile(const char *);
117 static void putdir(char *, long);
118 static void putdirattrs(char *, long);
119 static void putent(struct direct *);
120 static void rst_seekdir(RST_DIR *, long, long);
121 static long rst_telldir(RST_DIR *);
122 static struct direct *searchdir(ino_t, char *);
123 static void fail_dirtmp(char *);
126 * Extract directory contents, building up a directory structure
127 * on disk for extraction by name.
128 * If genmode is requested, save mode, owner, and times for all
129 * directories on the tape.
132 extractdirs(int genmode)
135 struct direct nulldir;
139 vprintf(stdout, "Extract directories from tape\n");
140 if ((tmpdir = getenv("TMPDIR")) == NULL || tmpdir[0] == '\0')
142 (void) sprintf(dirfile, "%s/rstdir%ld", tmpdir, dumpdate);
143 if (command != 'r' && command != 'R') {
144 (void *) strcat(dirfile, "-XXXXXX");
145 fd = mkstemp(dirfile);
147 fd = open(dirfile, O_RDWR|O_CREAT|O_EXCL, 0666);
148 if (fd == -1 || (df = fdopen(fd, "w")) == NULL) {
151 warn("%s: cannot create directory database", dirfile);
155 (void) sprintf(modefile, "%s/rstmode%ld", tmpdir, dumpdate);
156 if (command != 'r' && command != 'R') {
157 (void *) strcat(modefile, "-XXXXXX");
158 fd = mkstemp(modefile);
160 fd = open(modefile, O_RDWR|O_CREAT|O_EXCL, 0666);
161 if (fd == -1 || (mf = fdopen(fd, "w")) == NULL) {
164 warn("%s: cannot create modefile", modefile);
169 nulldir.d_type = DT_DIR;
170 nulldir.d_namlen = 1;
171 (void) strcpy(nulldir.d_name, "/");
172 nulldir.d_reclen = DIRSIZ(0, &nulldir);
174 curfile.name = "<directory file - name unknown>";
175 curfile.action = USING;
176 if (curfile.mode == 0 || (curfile.mode & IFMT) != IFDIR)
178 itp = allocinotab(&curfile, seekpt);
179 getfile(putdir, putdirattrs, xtrnull);
182 itp->t_size = seekpt - itp->t_seekpt;
185 fail_dirtmp(dirfile);
186 dirp = opendirfile(dirfile);
188 fprintf(stderr, "opendirfile: %s\n", strerror(errno));
189 if (mf != NULL && fclose(mf) != 0)
190 fail_dirtmp(modefile);
193 panic("Root directory is not on tape\n");
197 * skip over all the directories on the tape
203 while (curfile.ino && (curfile.mode & IFMT) == IFDIR) {
209 * Recursively find names and inumbers of all files in subtree
210 * pname and pass them off to be processed.
213 treescan(char *pname, ino_t ino, long (*todo)(char *, ino_t, int))
219 char locname[MAXPATHLEN];
221 itp = inotablookup(ino);
224 * Pname is name of a simple file or an unchanged directory.
226 (void) (*todo)(pname, ino, LEAF);
230 * Pname is a dumped directory name.
232 if ((*todo)(pname, ino, NODE) == FAIL)
235 * begin search through the directory
236 * skipping over "." and ".."
238 (void) strlcpy(locname, pname, sizeof(locname));
239 (void) strlcat(locname, "/", sizeof(locname));
240 namelen = strlen(locname);
241 rst_seekdir(dirp, itp->t_seekpt, itp->t_seekpt);
242 dp = rst_readdir(dirp); /* "." */
243 if (dp != NULL && strcmp(dp->d_name, ".") == 0)
244 dp = rst_readdir(dirp); /* ".." */
246 fprintf(stderr, "Warning: `.' missing from directory %s\n",
248 if (dp != NULL && strcmp(dp->d_name, "..") == 0)
249 dp = rst_readdir(dirp); /* first real entry */
251 fprintf(stderr, "Warning: `..' missing from directory %s\n",
253 bpt = rst_telldir(dirp);
255 * a zero inode signals end of directory
258 locname[namelen] = '\0';
259 if (namelen + dp->d_namlen >= sizeof(locname)) {
260 fprintf(stderr, "%s%s: name exceeds %d char\n",
261 locname, dp->d_name, sizeof(locname) - 1);
263 (void)strlcat(locname, dp->d_name, sizeof(locname));
264 treescan(locname, dp->d_ino, todo);
265 rst_seekdir(dirp, bpt, itp->t_seekpt);
267 dp = rst_readdir(dirp);
268 bpt = rst_telldir(dirp);
273 * Lookup a pathname which is always assumed to start from the ROOTINO.
276 pathsearch(const char *pathname)
280 char *path, *name, buffer[MAXPATHLEN];
282 strcpy(buffer, pathname);
288 while ((name = strsep(&path, "/")) != NULL && *name != '\0') {
289 if ((dp = searchdir(ino, name)) == NULL)
297 * Lookup the requested name in directory inum.
298 * Return its inode number if found, zero if it does not exist.
300 static struct direct *
301 searchdir(ino_t inum, char *name)
307 itp = inotablookup(inum);
310 rst_seekdir(dirp, itp->t_seekpt, itp->t_seekpt);
313 dp = rst_readdir(dirp);
316 } while (dp->d_namlen != len || strncmp(dp->d_name, name, len) != 0);
321 * Put the directory entries in the directory file
324 putdir(char *buf, long size)
329 for (loc = 0; loc < size; ) {
330 dp = (struct direct *)(buf + loc);
332 swabst((u_char *)"ls", (u_char *) dp);
333 if (oldinofmt && dp->d_ino != 0) {
334 #if BYTE_ORDER == BIG_ENDIAN
336 dp->d_namlen = dp->d_type;
338 if (!Bcvt && dp->d_namlen == 0)
339 dp->d_namlen = dp->d_type;
341 dp->d_type = DT_UNKNOWN;
343 i = DIRBLKSIZ - (loc & (DIRBLKSIZ - 1));
344 if ((dp->d_reclen & 0x3) != 0 ||
346 dp->d_reclen < DIRSIZ(0, dp)
348 || dp->d_namlen > NAME_MAX
351 vprintf(stdout, "Mangled directory: ");
352 if ((dp->d_reclen & 0x3) != 0)
354 "reclen not multiple of 4 ");
355 if (dp->d_reclen < DIRSIZ(0, dp))
357 "reclen less than DIRSIZ (%d < %d) ",
358 dp->d_reclen, DIRSIZ(0, dp));
360 if (dp->d_namlen > NAME_MAX)
362 "reclen name too big (%d > %d) ",
363 dp->d_namlen, NAME_MAX);
365 vprintf(stdout, "\n");
370 if (dp->d_ino != 0) {
377 * These variables are "local" to the following two functions.
379 char dirbuf[DIRBLKSIZ];
384 * add a new directory entry to a file.
387 putent(struct direct *dp)
389 dp->d_reclen = DIRSIZ(0, dp);
390 if (dirloc + dp->d_reclen > DIRBLKSIZ) {
391 ((struct direct *)(dirbuf + prev))->d_reclen =
393 if (fwrite(dirbuf, DIRBLKSIZ, 1, df) != 1)
394 fail_dirtmp(dirfile);
397 memmove(dirbuf + dirloc, dp, (long)dp->d_reclen);
399 dirloc += dp->d_reclen;
403 * flush out a directory that is finished.
408 ((struct direct *)(dirbuf + prev))->d_reclen = DIRBLKSIZ - prev;
409 if (fwrite(dirbuf, (int)dirloc, 1, df) != 1)
410 fail_dirtmp(dirfile);
416 * Save extended attributes for a directory entry to a file.
419 putdirattrs(char *buf, long size)
422 if (mf != NULL && fwrite(buf, size, 1, mf) != 1)
423 fail_dirtmp(modefile);
427 * Seek to an entry in a directory.
428 * Only values returned by rst_telldir should be passed to rst_seekdir.
429 * This routine handles many directories in a single file.
430 * It takes the base of the directory in the file, plus
431 * the desired seek offset into it.
434 rst_seekdir(RST_DIR *dirp, long loc, long base)
437 if (loc == rst_telldir(dirp))
441 fprintf(stderr, "bad seek pointer to rst_seekdir %ld\n", loc);
442 (void) lseek(dirp->dd_fd, base + (loc & ~(DIRBLKSIZ - 1)), SEEK_SET);
443 dirp->dd_loc = loc & (DIRBLKSIZ - 1);
444 if (dirp->dd_loc != 0)
445 dirp->dd_size = read(dirp->dd_fd, dirp->dd_buf, DIRBLKSIZ);
449 * get next entry in a directory.
452 rst_readdir(RST_DIR *dirp)
457 if (dirp->dd_loc == 0) {
458 dirp->dd_size = read(dirp->dd_fd, dirp->dd_buf,
460 if (dirp->dd_size <= 0) {
461 dprintf(stderr, "error reading directory\n");
465 if (dirp->dd_loc >= dirp->dd_size) {
469 dp = (struct direct *)(dirp->dd_buf + dirp->dd_loc);
470 if (dp->d_reclen == 0 ||
471 dp->d_reclen > DIRBLKSIZ + 1 - dirp->dd_loc) {
472 dprintf(stderr, "corrupted directory: bad reclen %d\n",
476 dirp->dd_loc += dp->d_reclen;
477 if (dp->d_ino == 0 && strcmp(dp->d_name, "/") == 0)
479 if (dp->d_ino >= maxino) {
480 dprintf(stderr, "corrupted directory: bad inum %d\n",
489 * Simulate the opening of a directory
492 rst_opendir(const char *name)
498 if ((ino = dirlookup(name)) > 0 &&
499 (itp = inotablookup(ino)) != NULL) {
500 dirp = opendirfile(dirfile);
501 rst_seekdir(dirp, itp->t_seekpt, itp->t_seekpt);
508 * In our case, there is nothing to do when closing a directory.
511 rst_closedir(void *arg)
516 (void)close(dirp->dd_fd);
522 * Simulate finding the current offset in the directory.
525 rst_telldir(RST_DIR *dirp)
527 return ((long)lseek(dirp->dd_fd,
528 (off_t)0, SEEK_CUR) - dirp->dd_size + dirp->dd_loc);
532 * Open a directory file.
535 opendirfile(const char *name)
540 if ((fd = open(name, O_RDONLY)) == -1)
542 if ((dirp = malloc(sizeof(RST_DIR))) == NULL) {
552 * Set the mode, owner, and times for all new or changed directories
555 setdirmodes(int flags)
558 struct modeinfo node;
565 vprintf(stdout, "Set directory mode, owner, and times.\n");
566 if ((tmpdir = getenv("TMPDIR")) == NULL || tmpdir[0] == '\0')
568 if (command == 'r' || command == 'R')
569 (void) sprintf(modefile, "%s/rstmode%ld", tmpdir, dumpdate);
570 if (modefile[0] == '#') {
571 panic("modefile not defined\n");
572 fprintf(stderr, "directory mode, owner, and times not set\n");
575 mf = fopen(modefile, "r");
577 fprintf(stderr, "fopen: %s\n", strerror(errno));
578 fprintf(stderr, "cannot open mode file %s\n", modefile);
579 fprintf(stderr, "directory mode, owner, and times not set\n");
586 (void) fread((char *)&node, 1, sizeof(struct modeinfo), mf);
588 warn("%s: cannot read modefile.", modefile);
589 fprintf(stderr, "Mode, owner, and times not set.\n");
594 if (node.extsize > 0) {
595 if (bufsize < node.extsize) {
598 if ((buf = malloc(node.extsize)) != 0) {
599 bufsize = node.extsize;
604 if (bufsize >= node.extsize) {
605 (void) fread(buf, 1, node.extsize, mf);
607 warn("%s: cannot read modefile.",
609 fprintf(stderr, "Not all external ");
610 fprintf(stderr, "attributes set.\n");
614 (void) fseek(mf, node.extsize, SEEK_CUR);
616 warn("%s: cannot seek in modefile.",
618 fprintf(stderr, "Not all directory ");
619 fprintf(stderr, "attributes set.\n");
624 ep = lookupino(node.ino);
625 if (command == 'i' || command == 'x') {
628 if ((flags & FORCE) == 0 && ep->e_flags & EXISTED) {
632 if (node.ino == ROOTINO &&
633 reply("set owner/mode for '.'") == FAIL)
637 panic("cannot find directory inode %d\n", node.ino);
642 if (node.extsize > 0) {
643 if (bufsize >= node.extsize) {
644 set_extattr_file(cp, buf, node.extsize);
646 fprintf(stderr, "Cannot restore %s%s\n",
647 "extended attributes for ", cp);
651 (void) chown(cp, myuid, node.gid);
653 (void) chown(cp, node.uid, node.gid);
654 (void) chmod(cp, node.mode);
655 utimes(cp, node.ctimep);
656 utimes(cp, node.mtimep);
657 (void) chflags(cp, node.flags);
667 * Generate a literal copy of a directory.
670 genliteraldir(char *name, ino_t ino)
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 fprintf(stderr, "%s: ", name);
681 (void) fflush(stderr);
682 fprintf(stderr, "cannot create file: %s\n", strerror(errno));
685 rst_seekdir(dirp, itp->t_seekpt, itp->t_seekpt);
686 dp = dup(dirp->dd_fd);
687 for (i = itp->t_size; i > 0; i -= BUFSIZ) {
688 size = i < BUFSIZ ? i : BUFSIZ;
689 if (read(dp, buf, (int) size) == -1) {
691 "write error extracting inode %d, name %s\n",
692 curfile.ino, curfile.name);
693 fprintf(stderr, "read: %s\n", strerror(errno));
696 if (!Nflag && write(ofile, buf, (int) size) == -1) {
698 "write error extracting inode %d, name %s\n",
699 curfile.ino, curfile.name);
700 fprintf(stderr, "write: %s\n", strerror(errno));
710 * Determine the type of an inode
717 itp = inotablookup(ino);
724 * Allocate and initialize a directory inode entry.
725 * If requested, save its pertinent mode, owner, and time info.
727 static struct inotab *
728 allocinotab(struct context *ctxp, long seekpt)
731 struct modeinfo node;
733 itp = calloc(1, sizeof(struct inotab));
735 panic("no memory for directory table\n");
736 itp->t_next = inotab[INOHASH(ctxp->ino)];
737 inotab[INOHASH(ctxp->ino)] = itp;
738 itp->t_ino = ctxp->ino;
739 itp->t_seekpt = seekpt;
742 node.ino = ctxp->ino;
743 node.mtimep[0].tv_sec = ctxp->atime_sec;
744 node.mtimep[0].tv_usec = ctxp->atime_nsec / 1000;
745 node.mtimep[1].tv_sec = ctxp->mtime_sec;
746 node.mtimep[1].tv_usec = ctxp->mtime_nsec / 1000;
747 node.ctimep[0].tv_sec = ctxp->atime_sec;
748 node.ctimep[0].tv_usec = ctxp->atime_nsec / 1000;
749 node.ctimep[1].tv_sec = ctxp->birthtime_sec;
750 node.ctimep[1].tv_usec = ctxp->birthtime_nsec / 1000;
751 node.extsize = ctxp->extsize;
752 node.mode = ctxp->mode;
753 node.flags = ctxp->file_flags;
754 node.uid = ctxp->uid;
755 node.gid = ctxp->gid;
756 if (fwrite((char *)&node, sizeof(struct modeinfo), 1, mf) != 1)
757 fail_dirtmp(modefile);
762 * Look up an inode in the table of directories
764 static struct inotab *
765 inotablookup(ino_t ino)
769 for (itp = inotab[INOHASH(ino)]; itp != NULL; itp = itp->t_next)
770 if (itp->t_ino == ino)
783 if (modefile[0] != '#') {
784 (void) truncate(modefile, 0);
785 (void) unlink(modefile);
787 if (dirfile[0] != '#') {
788 (void) truncate(dirfile, 0);
789 (void) unlink(dirfile);
795 * Print out information about the failure to save directory,
796 * extended attribute, and mode information.
799 fail_dirtmp(char *filename)
803 warn("%s: cannot write directory database", filename);
804 if (errno == ENOSPC) {
805 if ((tmpdir = getenv("TMPDIR")) == NULL || tmpdir[0] == '\0')
807 fprintf(stderr, "Try making space in %s, %s\n%s\n", tmpdir,
808 "or set environment variable TMPDIR",
809 "to an alternate location with more disk space.");