1 /*-
2 * SPDX-License-Identifier: BSD-3-Clause
3 *
4 * Copyright (c) 1983, 1993
5 * The Regents of the University of California. All rights reserved.
6 * (c) UNIX System Laboratories, Inc.
7 * All or some portions of this file are derived from material licensed
8 * to the University of California by American Telephone and Telegraph
9 * Co. or Unix System Laboratories, Inc. and are reproduced herein with
10 * the permission of UNIX System Laboratories, Inc.
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 * 1. Redistributions of source code must retain the above copyright
16 * notice, this list of conditions and the following disclaimer.
17 * 2. Redistributions in binary form must reproduce the above copyright
18 * notice, this list of conditions and the following disclaimer in the
19 * documentation and/or other materials provided with the distribution.
20 * 3. Neither the name of the University nor the names of its contributors
21 * may be used to endorse or promote products derived from this software
22 * without specific prior written permission.
23 *
24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 * SUCH DAMAGE.
35 */
36
37 #ifndef lint
38 #if 0
39 static char sccsid[] = "@(#)dirs.c 8.7 (Berkeley) 5/1/95";
40 #endif
41 #endif /* not lint */
42
43 #include <sys/param.h>
44 #include <sys/file.h>
45 #include <sys/stat.h>
46 #include <sys/time.h>
47
48 #include <ufs/ufs/dinode.h>
49 #include <ufs/ufs/dir.h>
50 #include <protocols/dumprestore.h>
51
52 #include <err.h>
53 #include <errno.h>
54 #include <limits.h>
55 #include <paths.h>
56 #include <stdint.h>
57 #include <stdio.h>
58 #include <stdlib.h>
59 #include <string.h>
60 #include <unistd.h>
61
62 #include "restore.h"
63 #include "extern.h"
64
65 /*
66 * Symbol table of directories read from tape.
67 */
68 #define HASHSIZE 1000
69 #define INOHASH(val) (val % HASHSIZE)
70 struct inotab {
71 struct inotab *t_next;
72 ino_t t_ino;
73 int32_t t_seekpt;
74 int32_t t_size;
75 };
76 static struct inotab *inotab[HASHSIZE];
77
78 /*
79 * Information retained about directories.
80 */
81 struct modeinfo {
82 ino_t ino;
83 struct timespec ctimep[2];
84 struct timespec mtimep[2];
85 mode_t mode;
86 uid_t uid;
87 gid_t gid;
88 u_int flags;
89 int extsize;
90 };
91
92 /*
93 * Definitions for library routines operating on directories.
94 */
95 #undef DIRBLKSIZ
96 #define DIRBLKSIZ 1024
97 struct rstdirdesc {
98 int dd_fd;
99 int32_t dd_loc;
100 int32_t dd_size;
101 char dd_buf[DIRBLKSIZ];
102 };
103
104 /*
105 * Global variables for this file.
106 */
107 static long seekpt;
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 */
113
114 static struct inotab *allocinotab(struct context *, long);
115 static void flushent(void);
116 static struct inotab *inotablookup(ino_t);
117 static RST_DIR *opendirfile(const char *);
118 static void putdir(char *, size_t);
119 static void putdirattrs(char *, size_t);
120 static void putent(struct direct *);
121 static void rst_seekdir(RST_DIR *, long, long);
122 static long rst_telldir(RST_DIR *);
123 static struct direct *searchdir(ino_t, char *);
124 static void fail_dirtmp(char *);
125
126 /*
127 * Extract directory contents, building up a directory structure
128 * on disk for extraction by name.
129 * If genmode is requested, save mode, owner, and times for all
130 * directories on the tape.
131 */
132 void
extractdirs(int genmode)133 extractdirs(int genmode)
134 {
135 struct inotab *itp;
136 struct direct nulldir;
137 int i, fd;
138 const char *tmpdir;
139
140 vprintf(stdout, "Extract directories from tape\n");
141 if ((tmpdir = getenv("TMPDIR")) == NULL || tmpdir[0] == '\0')
142 tmpdir = _PATH_TMP;
143 (void) snprintf(dirfile, sizeof(dirfile), "%s/rstdir%jd", tmpdir,
144 (intmax_t)dumpdate);
145 if (command != 'r' && command != 'R') {
146 (void) strcat(dirfile, "-XXXXXX");
147 fd = mkstemp(dirfile);
148 } else
149 fd = open(dirfile, O_RDWR|O_CREAT|O_EXCL, 0666);
150 if (fd == -1 || (df = fdopen(fd, "w")) == NULL) {
151 if (fd != -1)
152 close(fd);
153 warn("%s: cannot create directory database", dirfile);
154 done(1);
155 }
156 if (genmode != 0) {
157 (void) snprintf(modefile, sizeof(modefile), "%s/rstmode%jd",
158 tmpdir, (intmax_t)dumpdate);
159 if (command != 'r' && command != 'R') {
160 (void) strcat(modefile, "-XXXXXX");
161 fd = mkstemp(modefile);
162 } else
163 fd = open(modefile, O_RDWR|O_CREAT|O_EXCL, 0666);
164 if (fd == -1 || (mf = fdopen(fd, "w")) == NULL) {
165 if (fd != -1)
166 close(fd);
167 warn("%s: cannot create modefile", modefile);
168 done(1);
169 }
170 }
171 nulldir.d_ino = 0;
172 nulldir.d_type = DT_DIR;
173 nulldir.d_namlen = 1;
174 (void) strcpy(nulldir.d_name, "/");
175 nulldir.d_reclen = DIRSIZ(0, &nulldir);
176 for (;;) {
177 curfile.name = "<directory file - name unknown>";
178 curfile.action = USING;
179 if (curfile.mode == 0 || (curfile.mode & IFMT) != IFDIR)
180 break;
181 itp = allocinotab(&curfile, seekpt);
182 getfile(putdir, putdirattrs, xtrnull);
183 putent(&nulldir);
184 flushent();
185 itp->t_size = seekpt - itp->t_seekpt;
186 }
187 if (fclose(df) != 0)
188 fail_dirtmp(dirfile);
189 dirp = opendirfile(dirfile);
190 if (dirp == NULL)
191 fprintf(stderr, "opendirfile: %s\n", strerror(errno));
192 if (mf != NULL && fclose(mf) != 0)
193 fail_dirtmp(modefile);
194 i = dirlookup(dot);
195 if (i == 0)
196 panic("Root directory is not on tape\n");
197 }
198
199 /*
200 * skip over all the directories on the tape
201 */
202 void
skipdirs(void)203 skipdirs(void)
204 {
205
206 while (curfile.ino && (curfile.mode & IFMT) == IFDIR) {
207 skipfile();
208 }
209 }
210
211 /*
212 * Recursively find names and inumbers of all files in subtree
213 * pname and pass them off to be processed.
214 */
215 void
treescan(char * pname,ino_t ino,long (* todo)(char *,ino_t,int))216 treescan(char *pname, ino_t ino, long (*todo)(char *, ino_t, int))
217 {
218 struct inotab *itp;
219 struct direct *dp;
220 int namelen;
221 long bpt;
222 char locname[MAXPATHLEN];
223
224 itp = inotablookup(ino);
225 if (itp == NULL) {
226 /*
227 * Pname is name of a simple file or an unchanged directory.
228 */
229 (void) (*todo)(pname, ino, LEAF);
230 return;
231 }
232 /*
233 * Pname is a dumped directory name.
234 */
235 if ((*todo)(pname, ino, NODE) == FAIL)
236 return;
237 /*
238 * begin search through the directory
239 * skipping over "." and ".."
240 */
241 (void) strlcpy(locname, pname, sizeof(locname));
242 (void) strlcat(locname, "/", sizeof(locname));
243 namelen = strlen(locname);
244 rst_seekdir(dirp, itp->t_seekpt, itp->t_seekpt);
245 dp = rst_readdir(dirp); /* "." */
246 if (dp != NULL && strcmp(dp->d_name, ".") == 0)
247 dp = rst_readdir(dirp); /* ".." */
248 else
249 fprintf(stderr, "Warning: `.' missing from directory %s\n",
250 pname);
251 if (dp != NULL && strcmp(dp->d_name, "..") == 0)
252 dp = rst_readdir(dirp); /* first real entry */
253 else
254 fprintf(stderr, "Warning: `..' missing from directory %s\n",
255 pname);
256 bpt = rst_telldir(dirp);
257 /*
258 * a zero inode signals end of directory
259 */
260 while (dp != NULL) {
261 locname[namelen] = '\0';
262 if (namelen + dp->d_namlen >= sizeof(locname)) {
263 fprintf(stderr, "%s%s: name exceeds %zu char\n",
264 locname, dp->d_name, sizeof(locname) - 1);
265 } else {
266 (void)strlcat(locname, dp->d_name, sizeof(locname));
267 treescan(locname, dp->d_ino, todo);
268 rst_seekdir(dirp, bpt, itp->t_seekpt);
269 }
270 dp = rst_readdir(dirp);
271 bpt = rst_telldir(dirp);
272 }
273 }
274
275 /*
276 * Lookup a pathname which is always assumed to start from the UFS_ROOTINO.
277 */
278 struct direct *
pathsearch(const char * pathname)279 pathsearch(const char *pathname)
280 {
281 ino_t ino;
282 struct direct *dp;
283 char *path, *name, buffer[MAXPATHLEN];
284
285 strcpy(buffer, pathname);
286 path = buffer;
287 ino = UFS_ROOTINO;
288 while (*path == '/')
289 path++;
290 dp = NULL;
291 while ((name = strsep(&path, "/")) != NULL && *name != '\0') {
292 if ((dp = searchdir(ino, name)) == NULL)
293 return (NULL);
294 ino = dp->d_ino;
295 }
296 return (dp);
297 }
298
299 /*
300 * Lookup the requested name in directory inum.
301 * Return its inode number if found, zero if it does not exist.
302 */
303 static struct direct *
searchdir(ino_t inum,char * name)304 searchdir(ino_t inum, char *name)
305 {
306 struct direct *dp;
307 struct inotab *itp;
308 int len;
309
310 itp = inotablookup(inum);
311 if (itp == NULL)
312 return (NULL);
313 rst_seekdir(dirp, itp->t_seekpt, itp->t_seekpt);
314 len = strlen(name);
315 do {
316 dp = rst_readdir(dirp);
317 if (dp == NULL)
318 return (NULL);
319 } while (dp->d_namlen != len || strncmp(dp->d_name, name, len) != 0);
320 return (dp);
321 }
322
323 /*
324 * Put the directory entries in the directory file
325 */
326 static void
putdir(char * buf,size_t size)327 putdir(char *buf, size_t size)
328 {
329 struct direct *dp;
330 size_t loc, i;
331
332 for (loc = 0; loc < size; ) {
333 dp = (struct direct *)(buf + loc);
334 if (Bcvt)
335 swabst((u_char *)"ls", (u_char *) dp);
336 if (oldinofmt && dp->d_ino != 0) {
337 #if BYTE_ORDER == BIG_ENDIAN
338 if (Bcvt)
339 dp->d_namlen = dp->d_type;
340 #else
341 if (!Bcvt && dp->d_namlen == 0)
342 dp->d_namlen = dp->d_type;
343 #endif
344 dp->d_type = DT_UNKNOWN;
345 }
346 i = DIRBLKSIZ - (loc & (DIRBLKSIZ - 1));
347 if ((dp->d_reclen & 0x3) != 0 ||
348 dp->d_reclen > i ||
349 dp->d_reclen < DIRSIZ(0, dp)
350 #if NAME_MAX < 255
351 || dp->d_namlen > NAME_MAX
352 #endif
353 ) {
354 vprintf(stdout, "Mangled directory: ");
355 if ((dp->d_reclen & 0x3) != 0)
356 vprintf(stdout,
357 "reclen not multiple of 4 ");
358 if (dp->d_reclen < DIRSIZ(0, dp))
359 vprintf(stdout,
360 "reclen less than DIRSIZ (%u < %zu) ",
361 dp->d_reclen, DIRSIZ(0, dp));
362 #if NAME_MAX < 255
363 if (dp->d_namlen > NAME_MAX)
364 vprintf(stdout,
365 "reclen name too big (%u > %u) ",
366 dp->d_namlen, NAME_MAX);
367 #endif
368 vprintf(stdout, "\n");
369 loc += i;
370 continue;
371 }
372 loc += dp->d_reclen;
373 if (dp->d_ino != 0) {
374 putent(dp);
375 }
376 }
377 }
378
379 /*
380 * These variables are "local" to the following two functions.
381 */
382 char dirbuf[DIRBLKSIZ];
383 long dirloc = 0;
384 long prev = 0;
385
386 /*
387 * add a new directory entry to a file.
388 */
389 static void
putent(struct direct * dp)390 putent(struct direct *dp)
391 {
392 dp->d_reclen = DIRSIZ(0, dp);
393 if (dirloc + dp->d_reclen > DIRBLKSIZ) {
394 ((struct direct *)(dirbuf + prev))->d_reclen =
395 DIRBLKSIZ - prev;
396 if (fwrite(dirbuf, DIRBLKSIZ, 1, df) != 1)
397 fail_dirtmp(dirfile);
398 dirloc = 0;
399 }
400 memmove(dirbuf + dirloc, dp, (long)dp->d_reclen);
401 prev = dirloc;
402 dirloc += dp->d_reclen;
403 }
404
405 /*
406 * flush out a directory that is finished.
407 */
408 static void
flushent(void)409 flushent(void)
410 {
411 ((struct direct *)(dirbuf + prev))->d_reclen = DIRBLKSIZ - prev;
412 if (fwrite(dirbuf, (int)dirloc, 1, df) != 1)
413 fail_dirtmp(dirfile);
414 seekpt = ftell(df);
415 dirloc = 0;
416 }
417
418 /*
419 * Save extended attributes for a directory entry to a file.
420 */
421 static void
putdirattrs(char * buf,size_t size)422 putdirattrs(char *buf, size_t size)
423 {
424
425 if (mf != NULL && fwrite(buf, size, 1, mf) != 1)
426 fail_dirtmp(modefile);
427 }
428
429 /*
430 * Seek to an entry in a directory.
431 * Only values returned by rst_telldir should be passed to rst_seekdir.
432 * This routine handles many directories in a single file.
433 * It takes the base of the directory in the file, plus
434 * the desired seek offset into it.
435 */
436 static void
rst_seekdir(RST_DIR * dirp,long loc,long base)437 rst_seekdir(RST_DIR *dirp, long loc, long base)
438 {
439
440 if (loc == rst_telldir(dirp))
441 return;
442 loc -= base;
443 if (loc < 0)
444 fprintf(stderr, "bad seek pointer to rst_seekdir %ld\n", loc);
445 (void) lseek(dirp->dd_fd, base + rounddown2(loc, DIRBLKSIZ), SEEK_SET);
446 dirp->dd_loc = loc & (DIRBLKSIZ - 1);
447 if (dirp->dd_loc != 0)
448 dirp->dd_size = read(dirp->dd_fd, dirp->dd_buf, DIRBLKSIZ);
449 }
450
451 /*
452 * get next entry in a directory.
453 */
454 struct direct *
rst_readdir(RST_DIR * dirp)455 rst_readdir(RST_DIR *dirp)
456 {
457 struct direct *dp;
458
459 for (;;) {
460 if (dirp->dd_loc == 0) {
461 dirp->dd_size = read(dirp->dd_fd, dirp->dd_buf,
462 DIRBLKSIZ);
463 if (dirp->dd_size <= 0) {
464 dprintf(stderr, "error reading directory\n");
465 return (NULL);
466 }
467 }
468 if (dirp->dd_loc >= dirp->dd_size) {
469 dirp->dd_loc = 0;
470 continue;
471 }
472 dp = (struct direct *)(dirp->dd_buf + dirp->dd_loc);
473 if (dp->d_reclen == 0 ||
474 dp->d_reclen > DIRBLKSIZ + 1 - dirp->dd_loc) {
475 dprintf(stderr, "corrupted directory: bad reclen %d\n",
476 dp->d_reclen);
477 return (NULL);
478 }
479 dirp->dd_loc += dp->d_reclen;
480 if (dp->d_ino == 0 && strcmp(dp->d_name, "/") == 0)
481 return (NULL);
482 if (dp->d_ino >= maxino) {
483 dprintf(stderr, "corrupted directory: bad inum %d\n",
484 dp->d_ino);
485 continue;
486 }
487 return (dp);
488 }
489 }
490
491 /*
492 * Simulate the opening of a directory
493 */
494 void *
rst_opendir(const char * name)495 rst_opendir(const char *name)
496 {
497 struct inotab *itp;
498 RST_DIR *dirp;
499 ino_t ino;
500
501 if ((ino = dirlookup(name)) > 0 &&
502 (itp = inotablookup(ino)) != NULL) {
503 dirp = opendirfile(dirfile);
504 rst_seekdir(dirp, itp->t_seekpt, itp->t_seekpt);
505 return (dirp);
506 }
507 return (NULL);
508 }
509
510 /*
511 * In our case, there is nothing to do when closing a directory.
512 */
513 void
rst_closedir(void * arg)514 rst_closedir(void *arg)
515 {
516 RST_DIR *dirp;
517
518 dirp = arg;
519 (void)close(dirp->dd_fd);
520 free(dirp);
521 return;
522 }
523
524 /*
525 * Simulate finding the current offset in the directory.
526 */
527 static long
rst_telldir(RST_DIR * dirp)528 rst_telldir(RST_DIR *dirp)
529 {
530 return ((long)lseek(dirp->dd_fd,
531 (off_t)0, SEEK_CUR) - dirp->dd_size + dirp->dd_loc);
532 }
533
534 /*
535 * Open a directory file.
536 */
537 static RST_DIR *
opendirfile(const char * name)538 opendirfile(const char *name)
539 {
540 RST_DIR *dirp;
541 int fd;
542
543 if ((fd = open(name, O_RDONLY)) == -1)
544 return (NULL);
545 if ((dirp = malloc(sizeof(RST_DIR))) == NULL) {
546 (void)close(fd);
547 return (NULL);
548 }
549 dirp->dd_fd = fd;
550 dirp->dd_loc = 0;
551 return (dirp);
552 }
553
554 /*
555 * Set the mode, owner, and times for all new or changed directories
556 */
557 void
setdirmodes(int flags)558 setdirmodes(int flags)
559 {
560 FILE *mf;
561 struct modeinfo node;
562 struct entry *ep;
563 char *cp, *buf;
564 const char *tmpdir;
565 int bufsize;
566 uid_t myuid;
567
568 vprintf(stdout, "Set directory mode, owner, and times.\n");
569 if ((tmpdir = getenv("TMPDIR")) == NULL || tmpdir[0] == '\0')
570 tmpdir = _PATH_TMP;
571 if (command == 'r' || command == 'R')
572 (void) snprintf(modefile, sizeof(modefile), "%s/rstmode%jd",
573 tmpdir, (intmax_t)dumpdate);
574 if (modefile[0] == '#') {
575 panic("modefile not defined\n");
576 fprintf(stderr, "directory mode, owner, and times not set\n");
577 return;
578 }
579 mf = fopen(modefile, "r");
580 if (mf == NULL) {
581 fprintf(stderr, "fopen: %s\n", strerror(errno));
582 fprintf(stderr, "cannot open mode file %s\n", modefile);
583 fprintf(stderr, "directory mode, owner, and times not set\n");
584 return;
585 }
586 clearerr(mf);
587 bufsize = 0;
588 myuid = getuid();
589 for (;;) {
590 (void) fread((char *)&node, 1, sizeof(struct modeinfo), mf);
591 if (ferror(mf)) {
592 warn("%s: cannot read modefile.", modefile);
593 fprintf(stderr, "Mode, owner, and times not set.\n");
594 break;
595 }
596 if (feof(mf))
597 break;
598 if (node.extsize > 0) {
599 if (bufsize < node.extsize) {
600 if (bufsize > 0)
601 free(buf);
602 if ((buf = malloc(node.extsize)) != NULL) {
603 bufsize = node.extsize;
604 } else {
605 bufsize = 0;
606 }
607 }
608 if (bufsize >= node.extsize) {
609 (void) fread(buf, 1, node.extsize, mf);
610 if (ferror(mf)) {
611 warn("%s: cannot read modefile.",
612 modefile);
613 fprintf(stderr, "Not all external ");
614 fprintf(stderr, "attributes set.\n");
615 break;
616 }
617 } else {
618 (void) fseek(mf, node.extsize, SEEK_CUR);
619 if (ferror(mf)) {
620 warn("%s: cannot seek in modefile.",
621 modefile);
622 fprintf(stderr, "Not all directory ");
623 fprintf(stderr, "attributes set.\n");
624 break;
625 }
626 }
627 }
628 ep = lookupino(node.ino);
629 if (command == 'i' || command == 'x') {
630 if (ep == NULL)
631 continue;
632 if ((flags & FORCE) == 0 && ep->e_flags & EXISTED) {
633 ep->e_flags &= ~NEW;
634 continue;
635 }
636 if (node.ino == UFS_ROOTINO &&
637 reply("set owner/mode for '.'") == FAIL)
638 continue;
639 }
640 if (ep == NULL) {
641 panic("cannot find directory inode %ju\n",
642 (uintmax_t)node.ino);
643 continue;
644 }
645 cp = myname(ep);
646 if (!Nflag) {
647 if (myuid != 0)
648 (void) chown(cp, myuid, node.gid);
649 else
650 (void) chown(cp, node.uid, node.gid);
651 (void) chmod(cp, node.mode);
652 if (node.extsize > 0) {
653 if (bufsize >= node.extsize) {
654 set_extattr(-1, cp, buf, node.extsize, SXA_FILE);
655 } else {
656 fprintf(stderr, "Cannot restore %s%s\n",
657 "extended attributes for ", cp);
658 }
659 }
660 utimensat(AT_FDCWD, cp, node.ctimep, 0);
661 utimensat(AT_FDCWD, cp, node.mtimep, 0);
662 (void) chflags(cp, node.flags);
663 }
664 ep->e_flags &= ~NEW;
665 }
666 if (bufsize > 0)
667 free(buf);
668 (void) fclose(mf);
669 }
670
671 /*
672 * Generate a literal copy of a directory.
673 */
674 int
genliteraldir(char * name,ino_t ino)675 genliteraldir(char *name, ino_t ino)
676 {
677 struct inotab *itp;
678 int ofile, dp, i, size;
679 char buf[BUFSIZ];
680
681 itp = inotablookup(ino);
682 if (itp == NULL)
683 panic("Cannot find directory inode %ju named %s\n",
684 (uintmax_t)ino, name);
685 if ((ofile = open(name, O_WRONLY | O_CREAT | O_TRUNC, 0666)) < 0) {
686 fprintf(stderr, "%s: ", name);
687 (void) fflush(stderr);
688 fprintf(stderr, "cannot create file: %s\n", strerror(errno));
689 return (FAIL);
690 }
691 rst_seekdir(dirp, itp->t_seekpt, itp->t_seekpt);
692 dp = dup(dirp->dd_fd);
693 for (i = itp->t_size; i > 0; i -= BUFSIZ) {
694 size = MIN(i, BUFSIZ);
695 if (read(dp, buf, (int) size) == -1) {
696 fprintf(stderr,
697 "write error extracting inode %ju, name %s\n",
698 (uintmax_t)curfile.ino, curfile.name);
699 fprintf(stderr, "read: %s\n", strerror(errno));
700 done(1);
701 }
702 if (!Nflag && write(ofile, buf, (int) size) == -1) {
703 fprintf(stderr,
704 "write error extracting inode %ju, name %s\n",
705 (uintmax_t)curfile.ino, curfile.name);
706 fprintf(stderr, "write: %s\n", strerror(errno));
707 done(1);
708 }
709 }
710 (void) close(dp);
711 (void) close(ofile);
712 return (GOOD);
713 }
714
715 /*
716 * Determine the type of an inode
717 */
718 int
inodetype(ino_t ino)719 inodetype(ino_t ino)
720 {
721 struct inotab *itp;
722
723 itp = inotablookup(ino);
724 if (itp == NULL)
725 return (LEAF);
726 return (NODE);
727 }
728
729 /*
730 * Allocate and initialize a directory inode entry.
731 * If requested, save its pertinent mode, owner, and time info.
732 */
733 static struct inotab *
allocinotab(struct context * ctxp,long seekpt)734 allocinotab(struct context *ctxp, long seekpt)
735 {
736 struct inotab *itp;
737 struct modeinfo node;
738
739 itp = calloc(1, sizeof(struct inotab));
740 if (itp == NULL)
741 panic("no memory for directory table\n");
742 itp->t_next = inotab[INOHASH(ctxp->ino)];
743 inotab[INOHASH(ctxp->ino)] = itp;
744 itp->t_ino = ctxp->ino;
745 itp->t_seekpt = seekpt;
746 if (mf == NULL)
747 return (itp);
748 node.ino = ctxp->ino;
749 node.mtimep[0].tv_sec = ctxp->atime_sec;
750 node.mtimep[0].tv_nsec = ctxp->atime_nsec;
751 node.mtimep[1].tv_sec = ctxp->mtime_sec;
752 node.mtimep[1].tv_nsec = ctxp->mtime_nsec;
753 node.ctimep[0].tv_sec = ctxp->atime_sec;
754 node.ctimep[0].tv_nsec = ctxp->atime_nsec;
755 node.ctimep[1].tv_sec = ctxp->birthtime_sec;
756 node.ctimep[1].tv_nsec = ctxp->birthtime_nsec;
757 node.extsize = ctxp->extsize;
758 node.mode = ctxp->mode;
759 node.flags = ctxp->file_flags;
760 node.uid = ctxp->uid;
761 node.gid = ctxp->gid;
762 if (fwrite((char *)&node, sizeof(struct modeinfo), 1, mf) != 1)
763 fail_dirtmp(modefile);
764 return (itp);
765 }
766
767 /*
768 * Look up an inode in the table of directories
769 */
770 static struct inotab *
inotablookup(ino_t ino)771 inotablookup(ino_t ino)
772 {
773 struct inotab *itp;
774
775 for (itp = inotab[INOHASH(ino)]; itp != NULL; itp = itp->t_next)
776 if (itp->t_ino == ino)
777 return (itp);
778 return (NULL);
779 }
780
781 /*
782 * Clean up and exit
783 */
784 void
done(int exitcode)785 done(int exitcode)
786 {
787
788 closemt();
789 if (modefile[0] != '#') {
790 (void) truncate(modefile, 0);
791 (void) unlink(modefile);
792 }
793 if (dirfile[0] != '#') {
794 (void) truncate(dirfile, 0);
795 (void) unlink(dirfile);
796 }
797 exit(exitcode);
798 }
799
800 /*
801 * Print out information about the failure to save directory,
802 * extended attribute, and mode information.
803 */
804 static void
fail_dirtmp(char * filename)805 fail_dirtmp(char *filename)
806 {
807 const char *tmpdir;
808
809 warn("%s: cannot write directory database", filename);
810 if (errno == ENOSPC) {
811 if ((tmpdir = getenv("TMPDIR")) == NULL || tmpdir[0] == '\0')
812 tmpdir = _PATH_TMP;
813 fprintf(stderr, "Try making space in %s, %s\n%s\n", tmpdir,
814 "or set environment variable TMPDIR",
815 "to an alternate location with more disk space.");
816 }
817 done(1);
818 }
819