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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14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
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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
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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 *);
125 * Extract directory contents, building up a directory structure
126 * on disk for extraction by name.
127 * If genmode is requested, save mode, owner, and times for all
128 * directories on the tape.
131 extractdirs(int genmode)
134 struct direct nulldir;
138 vprintf(stdout, "Extract directories from tape\n");
139 if ((tmpdir = getenv("TMPDIR")) == NULL || tmpdir[0] == '\0')
141 (void) sprintf(dirfile, "%s/rstdir%d", tmpdir, dumpdate);
142 if (command != 'r' && command != 'R') {
143 (void *) strcat(dirfile, "-XXXXXX");
144 fd = mkstemp(dirfile);
146 fd = open(dirfile, O_RDWR|O_CREAT|O_EXCL, 0666);
147 if (fd == -1 || (df = fdopen(fd, "w")) == NULL) {
150 warn("%s - cannot create directory temporary\nfopen", dirfile);
154 (void) sprintf(modefile, "%s/rstmode%d", tmpdir, dumpdate);
155 if (command != 'r' && command != 'R') {
156 (void *) strcat(modefile, "-XXXXXX");
157 fd = mkstemp(modefile);
159 fd = open(modefile, O_RDWR|O_CREAT|O_EXCL, 0666);
160 if (fd == -1 || (mf = fdopen(fd, "w")) == NULL) {
163 warn("%s - cannot create modefile\nfopen", modefile);
168 nulldir.d_type = DT_DIR;
169 nulldir.d_namlen = 1;
170 (void) strcpy(nulldir.d_name, "/");
171 nulldir.d_reclen = DIRSIZ(0, &nulldir);
173 curfile.name = "<directory file - name unknown>";
174 curfile.action = USING;
175 if (curfile.mode == 0 || (curfile.mode & IFMT) != IFDIR) {
177 dirp = opendirfile(dirfile);
179 fprintf(stderr, "opendirfile: %s\n",
185 panic("Root directory is not on tape\n");
188 itp = allocinotab(&curfile, seekpt);
189 getfile(putdir, putdirattrs, xtrnull);
192 itp->t_size = seekpt - itp->t_seekpt;
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 + 1];
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) strncpy(locname, pname, sizeof(locname) - 1);
239 locname[sizeof(locname) - 1] = '\0';
240 (void) strncat(locname, "/", sizeof(locname) - strlen(locname));
241 namelen = strlen(locname);
242 rst_seekdir(dirp, itp->t_seekpt, itp->t_seekpt);
243 dp = rst_readdir(dirp); /* "." */
244 if (dp != NULL && strcmp(dp->d_name, ".") == 0)
245 dp = rst_readdir(dirp); /* ".." */
247 fprintf(stderr, "Warning: `.' missing from directory %s\n",
249 if (dp != NULL && strcmp(dp->d_name, "..") == 0)
250 dp = rst_readdir(dirp); /* first real entry */
252 fprintf(stderr, "Warning: `..' missing from directory %s\n",
254 bpt = rst_telldir(dirp);
256 * a zero inode signals end of directory
259 locname[namelen] = '\0';
260 if (namelen + dp->d_namlen >= sizeof(locname)) {
261 fprintf(stderr, "%s%s: name exceeds %d char\n",
262 locname, dp->d_name, sizeof(locname) - 1);
264 (void) strncat(locname, dp->d_name, (int)dp->d_namlen);
265 treescan(locname, dp->d_ino, todo);
266 rst_seekdir(dirp, bpt, itp->t_seekpt);
268 dp = rst_readdir(dirp);
269 bpt = rst_telldir(dirp);
274 * Lookup a pathname which is always assumed to start from the ROOTINO.
277 pathsearch(const char *pathname)
281 char *path, *name, buffer[MAXPATHLEN];
283 strcpy(buffer, pathname);
289 while ((name = strsep(&path, "/")) != NULL && *name != '\0') {
290 if ((dp = searchdir(ino, name)) == NULL)
298 * Lookup the requested name in directory inum.
299 * Return its inode number if found, zero if it does not exist.
301 static struct direct *
302 searchdir(ino_t inum, char *name)
308 itp = inotablookup(inum);
311 rst_seekdir(dirp, itp->t_seekpt, itp->t_seekpt);
314 dp = rst_readdir(dirp);
317 } while (dp->d_namlen != len || strncmp(dp->d_name, name, len) != 0);
322 * Put the directory entries in the directory file
325 putdir(char *buf, long size)
330 for (loc = 0; loc < size; ) {
331 dp = (struct direct *)(buf + loc);
333 swabst((u_char *)"ls", (u_char *) dp);
334 if (oldinofmt && dp->d_ino != 0) {
335 #if BYTE_ORDER == BIG_ENDIAN
337 dp->d_namlen = dp->d_type;
339 if (!Bcvt && dp->d_namlen == 0)
340 dp->d_namlen = dp->d_type;
342 dp->d_type = DT_UNKNOWN;
344 i = DIRBLKSIZ - (loc & (DIRBLKSIZ - 1));
345 if ((dp->d_reclen & 0x3) != 0 ||
347 dp->d_reclen < DIRSIZ(0, dp)
349 || dp->d_namlen > NAME_MAX
352 vprintf(stdout, "Mangled directory: ");
353 if ((dp->d_reclen & 0x3) != 0)
355 "reclen not multiple of 4 ");
356 if (dp->d_reclen < DIRSIZ(0, dp))
358 "reclen less than DIRSIZ (%d < %d) ",
359 dp->d_reclen, DIRSIZ(0, dp));
361 if (dp->d_namlen > NAME_MAX)
363 "reclen name too big (%d > %d) ",
364 dp->d_namlen, NAME_MAX);
366 vprintf(stdout, "\n");
371 if (dp->d_ino != 0) {
378 * These variables are "local" to the following two functions.
380 char dirbuf[DIRBLKSIZ];
385 * add a new directory entry to a file.
388 putent(struct direct *dp)
390 dp->d_reclen = DIRSIZ(0, dp);
391 if (dirloc + dp->d_reclen > DIRBLKSIZ) {
392 ((struct direct *)(dirbuf + prev))->d_reclen =
394 (void) fwrite(dirbuf, 1, DIRBLKSIZ, df);
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 (void) fwrite(dirbuf, (int)dirloc, 1, df);
415 * Save extended attributes for a directory entry to a file.
418 putdirattrs(char *buf, long size)
422 (void) fwrite(buf, 1, size, mf);
426 * Seek to an entry in a directory.
427 * Only values returned by rst_telldir should be passed to rst_seekdir.
428 * This routine handles many directories in a single file.
429 * It takes the base of the directory in the file, plus
430 * the desired seek offset into it.
433 rst_seekdir(RST_DIR *dirp, long loc, long base)
436 if (loc == rst_telldir(dirp))
440 fprintf(stderr, "bad seek pointer to rst_seekdir %ld\n", loc);
441 (void) lseek(dirp->dd_fd, base + (loc & ~(DIRBLKSIZ - 1)), SEEK_SET);
442 dirp->dd_loc = loc & (DIRBLKSIZ - 1);
443 if (dirp->dd_loc != 0)
444 dirp->dd_size = read(dirp->dd_fd, dirp->dd_buf, DIRBLKSIZ);
448 * get next entry in a directory.
451 rst_readdir(RST_DIR *dirp)
456 if (dirp->dd_loc == 0) {
457 dirp->dd_size = read(dirp->dd_fd, dirp->dd_buf,
459 if (dirp->dd_size <= 0) {
460 dprintf(stderr, "error reading directory\n");
464 if (dirp->dd_loc >= dirp->dd_size) {
468 dp = (struct direct *)(dirp->dd_buf + dirp->dd_loc);
469 if (dp->d_reclen == 0 ||
470 dp->d_reclen > DIRBLKSIZ + 1 - dirp->dd_loc) {
471 dprintf(stderr, "corrupted directory: bad reclen %d\n",
475 dirp->dd_loc += dp->d_reclen;
476 if (dp->d_ino == 0 && strcmp(dp->d_name, "/") == 0)
478 if (dp->d_ino >= maxino) {
479 dprintf(stderr, "corrupted directory: bad inum %d\n",
488 * Simulate the opening of a directory
491 rst_opendir(const char *name)
497 if ((ino = dirlookup(name)) > 0 &&
498 (itp = inotablookup(ino)) != NULL) {
499 dirp = opendirfile(dirfile);
500 rst_seekdir(dirp, itp->t_seekpt, itp->t_seekpt);
507 * In our case, there is nothing to do when closing a directory.
510 rst_closedir(void *arg)
515 (void)close(dirp->dd_fd);
521 * Simulate finding the current offset in the directory.
524 rst_telldir(RST_DIR *dirp)
526 return ((long)lseek(dirp->dd_fd,
527 (off_t)0, SEEK_CUR) - dirp->dd_size + dirp->dd_loc);
531 * Open a directory file.
534 opendirfile(const char *name)
539 if ((fd = open(name, O_RDONLY)) == -1)
541 if ((dirp = malloc(sizeof(RST_DIR))) == NULL) {
551 * Set the mode, owner, and times for all new or changed directories
554 setdirmodes(int flags)
557 struct modeinfo node;
563 vprintf(stdout, "Set directory mode, owner, and times.\n");
564 if ((tmpdir = getenv("TMPDIR")) == NULL || tmpdir[0] == '\0')
566 if (command == 'r' || command == 'R')
567 (void) sprintf(modefile, "%s/rstmode%d", tmpdir, dumpdate);
568 if (modefile[0] == '#') {
569 panic("modefile not defined\n");
570 fprintf(stderr, "directory mode, owner, and times not set\n");
573 mf = fopen(modefile, "r");
575 fprintf(stderr, "fopen: %s\n", strerror(errno));
576 fprintf(stderr, "cannot open mode file %s\n", modefile);
577 fprintf(stderr, "directory mode, owner, and times not set\n");
583 (void) fread((char *)&node, 1, sizeof(struct modeinfo), mf);
586 if (node.extsize > 0) {
587 if (bufsize < node.extsize) {
590 if ((buf = malloc(node.extsize)) != 0) {
591 bufsize = node.extsize;
596 if (bufsize >= node.extsize) {
597 (void) fread(buf, 1, node.extsize, mf);
599 (void) fseek(mf, node.extsize, SEEK_CUR);
602 ep = lookupino(node.ino);
603 if (command == 'i' || command == 'x') {
606 if ((flags & FORCE) == 0 && ep->e_flags & EXISTED) {
610 if (node.ino == ROOTINO &&
611 reply("set owner/mode for '.'") == FAIL)
615 panic("cannot find directory inode %d\n", node.ino);
620 if (node.extsize > 0) {
621 if (bufsize >= node.extsize) {
622 set_extattr_file(cp, buf, node.extsize);
624 fprintf(stderr, "Cannot restore %s%s\n",
625 "extended attributes for ", cp);
628 (void) chown(cp, node.uid, node.gid);
629 (void) chmod(cp, node.mode);
630 utimes(cp, node.ctimep);
631 utimes(cp, node.mtimep);
632 (void) chflags(cp, node.flags);
639 panic("error setting directory modes\n");
644 * Generate a literal copy of a directory.
647 genliteraldir(char *name, ino_t ino)
650 int ofile, dp, i, size;
653 itp = inotablookup(ino);
655 panic("Cannot find directory inode %d named %s\n", ino, name);
656 if ((ofile = open(name, O_WRONLY | O_CREAT | O_TRUNC, 0666)) < 0) {
657 fprintf(stderr, "%s: ", name);
658 (void) fflush(stderr);
659 fprintf(stderr, "cannot create file: %s\n", strerror(errno));
662 rst_seekdir(dirp, itp->t_seekpt, itp->t_seekpt);
663 dp = dup(dirp->dd_fd);
664 for (i = itp->t_size; i > 0; i -= BUFSIZ) {
665 size = i < BUFSIZ ? i : BUFSIZ;
666 if (read(dp, buf, (int) size) == -1) {
668 "write error extracting inode %d, name %s\n",
669 curfile.ino, curfile.name);
670 fprintf(stderr, "read: %s\n", strerror(errno));
673 if (!Nflag && write(ofile, buf, (int) size) == -1) {
675 "write error extracting inode %d, name %s\n",
676 curfile.ino, curfile.name);
677 fprintf(stderr, "write: %s\n", strerror(errno));
687 * Determine the type of an inode
694 itp = inotablookup(ino);
701 * Allocate and initialize a directory inode entry.
702 * If requested, save its pertinent mode, owner, and time info.
704 static struct inotab *
705 allocinotab(struct context *ctxp, long seekpt)
708 struct modeinfo node;
710 itp = calloc(1, sizeof(struct inotab));
712 panic("no memory for directory table\n");
713 itp->t_next = inotab[INOHASH(ctxp->ino)];
714 inotab[INOHASH(ctxp->ino)] = itp;
715 itp->t_ino = ctxp->ino;
716 itp->t_seekpt = seekpt;
719 node.ino = ctxp->ino;
720 node.mtimep[0].tv_sec = ctxp->atime_sec;
721 node.mtimep[0].tv_usec = ctxp->atime_nsec / 1000;
722 node.mtimep[1].tv_sec = ctxp->mtime_sec;
723 node.mtimep[1].tv_usec = ctxp->mtime_nsec / 1000;
724 node.ctimep[0].tv_sec = ctxp->atime_sec;
725 node.ctimep[0].tv_usec = ctxp->atime_nsec / 1000;
726 node.ctimep[1].tv_sec = ctxp->birthtime_sec;
727 node.ctimep[1].tv_usec = ctxp->birthtime_nsec / 1000;
728 node.extsize = ctxp->extsize;
729 node.mode = ctxp->mode;
730 node.flags = ctxp->file_flags;
731 node.uid = ctxp->uid;
732 node.gid = ctxp->gid;
733 (void) fwrite((char *)&node, 1, sizeof(struct modeinfo), mf);
738 * Look up an inode in the table of directories
740 static struct inotab *
741 inotablookup(ino_t ino)
745 for (itp = inotab[INOHASH(ino)]; itp != NULL; itp = itp->t_next)
746 if (itp->t_ino == ino)
759 if (modefile[0] != '#')
760 (void) unlink(modefile);
761 if (dirfile[0] != '#')
762 (void) unlink(dirfile);