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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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
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41 static char sccsid[] = "@(#)dirs.c 8.7 (Berkeley) 5/1/95";
43 static const char rcsid[] =
47 #include <sys/param.h>
52 #include <ufs/ufs/dinode.h>
53 #include <ufs/ufs/dir.h>
54 #include <protocols/dumprestore.h>
68 * Symbol table of directories read from tape.
71 #define INOHASH(val) (val % HASHSIZE)
73 struct inotab *t_next;
78 static struct inotab *inotab[HASHSIZE];
81 * Information retained about directories.
85 struct timeval timep[2];
93 * Definitions for library routines operating on directories.
96 #define DIRBLKSIZ 1024
101 char dd_buf[DIRBLKSIZ];
105 * Global variables for this file.
108 static FILE *df, *mf;
109 static RST_DIR *dirp;
110 static char dirfile[MAXPATHLEN] = "#"; /* No file */
111 static char modefile[MAXPATHLEN] = "#"; /* No file */
112 static char dot[2] = "."; /* So it can be modified */
115 * Format of old style directories.
120 char d_name[ODIRSIZ];
123 static struct inotab *allocinotab(ino_t, struct dinode *, long);
124 static void dcvt(struct odirect *, struct direct *);
125 static void flushent(void);
126 static struct inotab *inotablookup(ino_t);
127 static RST_DIR *opendirfile(const char *);
128 static void putdir(char *, long);
129 static void putent(struct direct *);
130 static void rst_seekdir(RST_DIR *, long, long);
131 static long rst_telldir(RST_DIR *);
132 static struct direct *searchdir(ino_t, char *);
135 * Extract directory contents, building up a directory structure
136 * on disk for extraction by name.
137 * If genmode is requested, save mode, owner, and times for all
138 * directories on the tape.
141 extractdirs(int genmode)
146 struct direct nulldir;
150 vprintf(stdout, "Extract directories from tape\n");
151 if ((tmpdir = getenv("TMPDIR")) == NULL || tmpdir[0] == '\0')
153 (void) sprintf(dirfile, "%s/rstdir%d", tmpdir, dumpdate);
154 if (command != 'r' && command != 'R') {
155 (void *) strcat(dirfile, "-XXXXXX");
156 fd = mkstemp(dirfile);
158 fd = open(dirfile, O_RDWR|O_CREAT|O_EXCL, 0666);
159 if (fd == -1 || (df = fdopen(fd, "w")) == NULL) {
162 warn("%s - cannot create directory temporary\nfopen", dirfile);
166 (void) sprintf(modefile, "%s/rstmode%d", tmpdir, dumpdate);
167 if (command != 'r' && command != 'R') {
168 (void *) strcat(modefile, "-XXXXXX");
169 fd = mkstemp(modefile);
171 fd = open(modefile, O_RDWR|O_CREAT|O_EXCL, 0666);
172 if (fd == -1 || (mf = fdopen(fd, "w")) == NULL) {
175 warn("%s - cannot create modefile\nfopen", modefile);
180 nulldir.d_type = DT_DIR;
181 nulldir.d_namlen = 1;
182 (void) strcpy(nulldir.d_name, "/");
183 nulldir.d_reclen = DIRSIZ(0, &nulldir);
185 curfile.name = "<directory file - name unknown>";
186 curfile.action = USING;
188 if (ip == NULL || (ip->di_mode & IFMT) != IFDIR) {
190 dirp = opendirfile(dirfile);
192 fprintf(stderr, "opendirfile: %s\n",
198 panic("Root directory is not on tape\n");
201 itp = allocinotab(curfile.ino, ip, seekpt);
202 getfile(putdir, xtrnull);
205 itp->t_size = seekpt - itp->t_seekpt;
210 * skip over all the directories on the tape
216 while (curfile.dip && (curfile.dip->di_mode & IFMT) == IFDIR) {
222 * Recursively find names and inumbers of all files in subtree
223 * pname and pass them off to be processed.
226 treescan(char *pname, ino_t ino, long (*todo)(char *, ino_t, int))
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.
290 pathsearch(const char *pathname)
294 char *path, *name, buffer[MAXPATHLEN];
296 strcpy(buffer, pathname);
302 while ((name = strsep(&path, "/")) != NULL && *name != '\0') {
303 if ((dp = searchdir(ino, name)) == NULL)
311 * Lookup the requested name in directory inum.
312 * Return its inode number if found, zero if it does not exist.
314 static struct direct *
315 searchdir(ino_t inum, char *name)
321 itp = inotablookup(inum);
324 rst_seekdir(dirp, itp->t_seekpt, itp->t_seekpt);
327 dp = rst_readdir(dirp);
330 } while (dp->d_namlen != len || strncmp(dp->d_name, name, len) != 0);
335 * Put the directory entries in the directory file
338 putdir(char *buf, long size)
340 struct direct cvtbuf;
342 struct odirect *eodp;
347 eodp = (struct odirect *)&buf[size];
348 for (odp = (struct odirect *)buf; odp < eodp; odp++)
349 if (odp->d_ino != 0) {
354 for (loc = 0; loc < size; ) {
355 dp = (struct direct *)(buf + loc);
357 swabst((u_char *)"ls", (u_char *) dp);
358 if (oldinofmt && dp->d_ino != 0) {
359 # if BYTE_ORDER == BIG_ENDIAN
361 dp->d_namlen = dp->d_type;
364 dp->d_namlen = dp->d_type;
366 dp->d_type = DT_UNKNOWN;
368 i = DIRBLKSIZ - (loc & (DIRBLKSIZ - 1));
369 if ((dp->d_reclen & 0x3) != 0 ||
371 dp->d_reclen < DIRSIZ(0, dp) ||
372 dp->d_namlen > NAME_MAX) {
373 vprintf(stdout, "Mangled directory: ");
374 if ((dp->d_reclen & 0x3) != 0)
376 "reclen not multiple of 4 ");
377 if (dp->d_reclen < DIRSIZ(0, dp))
379 "reclen less than DIRSIZ (%d < %d) ",
380 dp->d_reclen, DIRSIZ(0, dp));
381 if (dp->d_namlen > NAME_MAX)
383 "reclen name too big (%d > %d) ",
384 dp->d_namlen, NAME_MAX);
385 vprintf(stdout, "\n");
390 if (dp->d_ino != 0) {
398 * These variables are "local" to the following two functions.
400 char dirbuf[DIRBLKSIZ];
405 * add a new directory entry to a file.
408 putent(struct direct *dp)
410 dp->d_reclen = DIRSIZ(0, dp);
411 if (dirloc + dp->d_reclen > DIRBLKSIZ) {
412 ((struct direct *)(dirbuf + prev))->d_reclen =
414 (void) fwrite(dirbuf, 1, DIRBLKSIZ, df);
417 memmove(dirbuf + dirloc, dp, (long)dp->d_reclen);
419 dirloc += dp->d_reclen;
423 * flush out a directory that is finished.
428 ((struct direct *)(dirbuf + prev))->d_reclen = DIRBLKSIZ - prev;
429 (void) fwrite(dirbuf, (int)dirloc, 1, df);
435 dcvt(struct odirect *odp, struct direct *ndp)
438 memset(ndp, 0, (long)(sizeof *ndp));
439 ndp->d_ino = odp->d_ino;
440 ndp->d_type = DT_UNKNOWN;
441 (void) strncpy(ndp->d_name, odp->d_name, ODIRSIZ);
442 ndp->d_namlen = strlen(ndp->d_name);
443 ndp->d_reclen = DIRSIZ(0, ndp);
447 * Seek to an entry in a directory.
448 * Only values returned by rst_telldir should be passed to rst_seekdir.
449 * This routine handles many directories in a single file.
450 * It takes the base of the directory in the file, plus
451 * the desired seek offset into it.
454 rst_seekdir(RST_DIR *dirp, long loc, long base)
457 if (loc == rst_telldir(dirp))
461 fprintf(stderr, "bad seek pointer to rst_seekdir %ld\n", loc);
462 (void) lseek(dirp->dd_fd, base + (loc & ~(DIRBLKSIZ - 1)), SEEK_SET);
463 dirp->dd_loc = loc & (DIRBLKSIZ - 1);
464 if (dirp->dd_loc != 0)
465 dirp->dd_size = read(dirp->dd_fd, dirp->dd_buf, DIRBLKSIZ);
469 * get next entry in a directory.
472 rst_readdir(RST_DIR *dirp)
477 if (dirp->dd_loc == 0) {
478 dirp->dd_size = read(dirp->dd_fd, dirp->dd_buf,
480 if (dirp->dd_size <= 0) {
481 dprintf(stderr, "error reading directory\n");
485 if (dirp->dd_loc >= dirp->dd_size) {
489 dp = (struct direct *)(dirp->dd_buf + dirp->dd_loc);
490 if (dp->d_reclen == 0 ||
491 dp->d_reclen > DIRBLKSIZ + 1 - dirp->dd_loc) {
492 dprintf(stderr, "corrupted directory: bad reclen %d\n",
496 dirp->dd_loc += dp->d_reclen;
497 if (dp->d_ino == 0 && strcmp(dp->d_name, "/") == 0)
499 if (dp->d_ino >= maxino) {
500 dprintf(stderr, "corrupted directory: bad inum %d\n",
509 * Simulate the opening of a directory
512 rst_opendir(const char *name)
518 if ((ino = dirlookup(name)) > 0 &&
519 (itp = inotablookup(ino)) != NULL) {
520 dirp = opendirfile(dirfile);
521 rst_seekdir(dirp, itp->t_seekpt, itp->t_seekpt);
528 * In our case, there is nothing to do when closing a directory.
531 rst_closedir(RST_DIR *dirp)
534 (void)close(dirp->dd_fd);
540 * Simulate finding the current offset in the directory.
543 rst_telldir(RST_DIR *dirp)
545 return ((long)lseek(dirp->dd_fd,
546 (off_t)0, SEEK_CUR) - dirp->dd_size + dirp->dd_loc);
550 * Open a directory file.
553 opendirfile(const char *name)
558 if ((fd = open(name, O_RDONLY)) == -1)
560 if ((dirp = malloc(sizeof(RST_DIR))) == NULL) {
570 * Set the mode, owner, and times for all new or changed directories
573 setdirmodes(int flags)
576 struct modeinfo node;
581 vprintf(stdout, "Set directory mode, owner, and times.\n");
582 if ((tmpdir = getenv("TMPDIR")) == NULL || tmpdir[0] == '\0')
584 if (command == 'r' || command == 'R')
585 (void) sprintf(modefile, "%s/rstmode%d", tmpdir, dumpdate);
586 if (modefile[0] == '#') {
587 panic("modefile not defined\n");
588 fprintf(stderr, "directory mode, owner, and times not set\n");
591 mf = fopen(modefile, "r");
593 fprintf(stderr, "fopen: %s\n", strerror(errno));
594 fprintf(stderr, "cannot open mode file %s\n", modefile);
595 fprintf(stderr, "directory mode, owner, and times not set\n");
600 (void) fread((char *)&node, 1, sizeof(struct modeinfo), mf);
603 ep = lookupino(node.ino);
604 if (command == 'i' || command == 'x') {
607 if ((flags & FORCE) == 0 && ep->e_flags & EXISTED) {
611 if (node.ino == ROOTINO &&
612 reply("set owner/mode for '.'") == FAIL)
616 panic("cannot find directory inode %d\n", node.ino);
620 (void) chown(cp, node.uid, node.gid);
621 (void) chmod(cp, node.mode);
622 utimes(cp, node.timep);
623 (void) chflags(cp, node.flags);
629 panic("error setting directory modes\n");
634 * Generate a literal copy of a directory.
637 genliteraldir(char *name, ino_t ino)
640 int ofile, dp, i, size;
643 itp = inotablookup(ino);
645 panic("Cannot find directory inode %d named %s\n", ino, name);
646 if ((ofile = open(name, O_WRONLY | O_CREAT | O_TRUNC, 0666)) < 0) {
647 fprintf(stderr, "%s: ", name);
648 (void) fflush(stderr);
649 fprintf(stderr, "cannot create file: %s\n", strerror(errno));
652 rst_seekdir(dirp, itp->t_seekpt, itp->t_seekpt);
653 dp = dup(dirp->dd_fd);
654 for (i = itp->t_size; i > 0; i -= BUFSIZ) {
655 size = i < BUFSIZ ? i : BUFSIZ;
656 if (read(dp, buf, (int) size) == -1) {
658 "write error extracting inode %d, name %s\n",
659 curfile.ino, curfile.name);
660 fprintf(stderr, "read: %s\n", strerror(errno));
663 if (!Nflag && write(ofile, buf, (int) size) == -1) {
665 "write error extracting inode %d, name %s\n",
666 curfile.ino, curfile.name);
667 fprintf(stderr, "write: %s\n", strerror(errno));
677 * Determine the type of an inode
684 itp = inotablookup(ino);
691 * Allocate and initialize a directory inode entry.
692 * If requested, save its pertinent mode, owner, and time info.
694 static struct inotab *
695 allocinotab(ino_t ino, struct dinode *dip, long seekpt)
698 struct modeinfo node;
700 itp = calloc(1, sizeof(struct inotab));
702 panic("no memory directory table\n");
703 itp->t_next = inotab[INOHASH(ino)];
704 inotab[INOHASH(ino)] = itp;
706 itp->t_seekpt = seekpt;
710 node.timep[0].tv_sec = dip->di_atime;
711 node.timep[0].tv_usec = dip->di_atimensec / 1000;
712 node.timep[1].tv_sec = dip->di_mtime;
713 node.timep[1].tv_usec = dip->di_mtimensec / 1000;
714 node.mode = dip->di_mode;
715 node.flags = dip->di_flags;
716 node.uid = dip->di_uid;
717 node.gid = dip->di_gid;
718 (void) fwrite((char *)&node, 1, sizeof(struct modeinfo), mf);
723 * Look up an inode in the table of directories
725 static struct inotab *
726 inotablookup(ino_t ino)
730 for (itp = inotab[INOHASH(ino)]; itp != NULL; itp = itp->t_next)
731 if (itp->t_ino == ino)
744 if (modefile[0] != '#')
745 (void) unlink(modefile);
746 if (dirfile[0] != '#')
747 (void) unlink(dirfile);