xref: /freebsd/sbin/restore/tape.c (revision 8fc257994d0ce2396196d7a06d50d20c8015f4b7)
1 /*
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.
9  *
10  * Redistribution and use in source and binary forms, with or without
11  * modification, are permitted provided that the following conditions
12  * are met:
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.
21  *
22  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
23  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
26  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32  * SUCH DAMAGE.
33  */
34 
35 #ifndef lint
36 #if 0
37 static char sccsid[] = "@(#)tape.c	8.9 (Berkeley) 5/1/95";
38 #endif
39 #endif /* not lint */
40 
41 #include <sys/cdefs.h>
42 __FBSDID("$FreeBSD$");
43 
44 #include <sys/param.h>
45 #include <sys/file.h>
46 #include <sys/mtio.h>
47 #include <sys/stat.h>
48 #include <sys/time.h>
49 #include <sys/extattr.h>
50 #include <sys/acl.h>
51 
52 #include <ufs/ufs/extattr.h>
53 #include <ufs/ufs/dinode.h>
54 #include <protocols/dumprestore.h>
55 
56 #include <errno.h>
57 #include <limits.h>
58 #include <paths.h>
59 #include <setjmp.h>
60 #include <stdint.h>
61 #include <stdio.h>
62 #include <stdlib.h>
63 #include <string.h>
64 #include <time.h>
65 #include <timeconv.h>
66 #include <unistd.h>
67 
68 #include "restore.h"
69 #include "extern.h"
70 
71 static long	fssize = MAXBSIZE;
72 static int	mt = -1;
73 static int	pipein = 0;
74 static int	pipecmdin = 0;
75 static FILE	*popenfp = NULL;
76 static char	*magtape;
77 static int	blkcnt;
78 static int	numtrec;
79 static char	*tapebuf;
80 static union	u_spcl endoftapemark;
81 static long	byteslide = 0;
82 static long	blksread;		/* blocks read since last header */
83 static int64_t	tapeaddr = 0;		/* current TP_BSIZE tape record */
84 static long	tapesread;
85 static jmp_buf	restart;
86 static int	gettingfile = 0;	/* restart has a valid frame */
87 static char	*host = NULL;
88 static int	readmapflag;
89 
90 static int	ofile;
91 static char	*map;
92 static char	lnkbuf[MAXPATHLEN + 1];
93 static int	pathlen;
94 
95 int		Bcvt;		/* Swap Bytes */
96 int		oldinofmt;	/* FreeBSD 1 inode format needs cvt */
97 
98 #define	FLUSHTAPEBUF()	blkcnt = ntrec + 1
99 
100 char *namespace_names[] = EXTATTR_NAMESPACE_NAMES;
101 
102 static void	 accthdr(struct s_spcl *);
103 static int	 checksum(int *);
104 static void	 findinode(struct s_spcl *);
105 static void	 findtapeblksize(void);
106 static char	*setupextattr(int);
107 static void	 xtrattr(char *, long);
108 static void	 set_extattr_link(char *, void *, int);
109 static void	 set_extattr_fd(int, char *, void *, int);
110 static int	 gethead(struct s_spcl *);
111 static void	 readtape(char *);
112 static void	 setdumpnum(void);
113 static u_long	 swabl(u_long);
114 static u_char	*swablong(u_char *, int);
115 static u_char	*swabshort(u_char *, int);
116 static void	 terminateinput(void);
117 static void	 xtrfile(char *, long);
118 static void	 xtrlnkfile(char *, long);
119 static void	 xtrlnkskip(char *, long);
120 static void	 xtrmap(char *, long);
121 static void	 xtrmapskip(char *, long);
122 static void	 xtrskip(char *, long);
123 
124 /*
125  * Set up an input source
126  */
127 void
128 setinput(char *source, int ispipecommand)
129 {
130 	FLUSHTAPEBUF();
131 	if (bflag)
132 		newtapebuf(ntrec);
133 	else
134 		newtapebuf(NTREC > HIGHDENSITYTREC ? NTREC : HIGHDENSITYTREC);
135 	terminal = stdin;
136 
137 	if (ispipecommand)
138 		pipecmdin++;
139 	else
140 #ifdef RRESTORE
141 	if (strchr(source, ':')) {
142 		host = source;
143 		source = strchr(host, ':');
144 		*source++ = '\0';
145 		if (rmthost(host) == 0)
146 			done(1);
147 	} else
148 #endif
149 	if (strcmp(source, "-") == 0) {
150 		/*
151 		 * Since input is coming from a pipe we must establish
152 		 * our own connection to the terminal.
153 		 */
154 		terminal = fopen(_PATH_TTY, "r");
155 		if (terminal == NULL) {
156 			(void)fprintf(stderr, "cannot open %s: %s\n",
157 			    _PATH_TTY, strerror(errno));
158 			terminal = fopen(_PATH_DEVNULL, "r");
159 			if (terminal == NULL) {
160 				(void)fprintf(stderr, "cannot open %s: %s\n",
161 				    _PATH_DEVNULL, strerror(errno));
162 				done(1);
163 			}
164 		}
165 		pipein++;
166 	}
167 	setuid(getuid());	/* no longer need or want root privileges */
168 	magtape = strdup(source);
169 	if (magtape == NULL) {
170 		fprintf(stderr, "Cannot allocate space for magtape buffer\n");
171 		done(1);
172 	}
173 }
174 
175 void
176 newtapebuf(long size)
177 {
178 	static int tapebufsize = -1;
179 
180 	ntrec = size;
181 	if (size <= tapebufsize)
182 		return;
183 	if (tapebuf != NULL)
184 		free(tapebuf - TP_BSIZE);
185 	tapebuf = malloc((size+1) * TP_BSIZE);
186 	if (tapebuf == NULL) {
187 		fprintf(stderr, "Cannot allocate space for tape buffer\n");
188 		done(1);
189 	}
190 	tapebuf += TP_BSIZE;
191 	tapebufsize = size;
192 }
193 
194 /*
195  * Verify that the tape drive can be accessed and
196  * that it actually is a dump tape.
197  */
198 void
199 setup(void)
200 {
201 	int i, j, *ip;
202 	struct stat stbuf;
203 
204 	vprintf(stdout, "Verify tape and initialize maps\n");
205 	if (pipecmdin) {
206 		if (setenv("RESTORE_VOLUME", "1", 1) == -1) {
207 			fprintf(stderr, "Cannot set $RESTORE_VOLUME: %s\n",
208 			    strerror(errno));
209 			done(1);
210 		}
211 		popenfp = popen(magtape, "r");
212 		mt = popenfp ? fileno(popenfp) : -1;
213 	} else
214 #ifdef RRESTORE
215 	if (host)
216 		mt = rmtopen(magtape, 0);
217 	else
218 #endif
219 	if (pipein)
220 		mt = 0;
221 	else
222 		mt = open(magtape, O_RDONLY, 0);
223 	if (mt < 0) {
224 		fprintf(stderr, "%s: %s\n", magtape, strerror(errno));
225 		done(1);
226 	}
227 	volno = 1;
228 	setdumpnum();
229 	FLUSHTAPEBUF();
230 	if (!pipein && !pipecmdin && !bflag)
231 		findtapeblksize();
232 	if (gethead(&spcl) == FAIL) {
233 		fprintf(stderr, "Tape is not a dump tape\n");
234 		done(1);
235 	}
236 	if (pipein) {
237 		endoftapemark.s_spcl.c_magic = FS_UFS2_MAGIC;
238 		endoftapemark.s_spcl.c_type = TS_END;
239 		ip = (int *)&endoftapemark;
240 		j = sizeof(union u_spcl) / sizeof(int);
241 		i = 0;
242 		do
243 			i += *ip++;
244 		while (--j);
245 		endoftapemark.s_spcl.c_checksum = CHECKSUM - i;
246 	}
247 	if (vflag || command == 't')
248 		printdumpinfo();
249 	dumptime = _time64_to_time(spcl.c_ddate);
250 	dumpdate = _time64_to_time(spcl.c_date);
251 	if (stat(".", &stbuf) < 0) {
252 		fprintf(stderr, "cannot stat .: %s\n", strerror(errno));
253 		done(1);
254 	}
255 	if (stbuf.st_blksize > 0 && stbuf.st_blksize < TP_BSIZE )
256 		fssize = TP_BSIZE;
257 	if (stbuf.st_blksize >= TP_BSIZE && stbuf.st_blksize <= MAXBSIZE)
258 		fssize = stbuf.st_blksize;
259 	if (((fssize - 1) & fssize) != 0) {
260 		fprintf(stderr, "bad block size %ld\n", fssize);
261 		done(1);
262 	}
263 	if (spcl.c_volume != 1) {
264 		fprintf(stderr, "Tape is not volume 1 of the dump\n");
265 		done(1);
266 	}
267 	if (gethead(&spcl) == FAIL) {
268 		dprintf(stdout, "header read failed at %ld blocks\n", blksread);
269 		panic("no header after volume mark!\n");
270 	}
271 	findinode(&spcl);
272 	if (spcl.c_type != TS_CLRI) {
273 		fprintf(stderr, "Cannot find file removal list\n");
274 		done(1);
275 	}
276 	maxino = (spcl.c_count * TP_BSIZE * NBBY) + 1;
277 	dprintf(stdout, "maxino = %d\n", maxino);
278 	map = calloc((unsigned)1, (unsigned)howmany(maxino, NBBY));
279 	if (map == NULL)
280 		panic("no memory for active inode map\n");
281 	usedinomap = map;
282 	curfile.action = USING;
283 	getfile(xtrmap, xtrmapskip, xtrmapskip);
284 	if (spcl.c_type != TS_BITS) {
285 		fprintf(stderr, "Cannot find file dump list\n");
286 		done(1);
287 	}
288 	map = calloc((unsigned)1, (unsigned)howmany(maxino, NBBY));
289 	if (map == (char *)NULL)
290 		panic("no memory for file dump list\n");
291 	dumpmap = map;
292 	curfile.action = USING;
293 	getfile(xtrmap, xtrmapskip, xtrmapskip);
294 	/*
295 	 * If there may be whiteout entries on the tape, pretend that the
296 	 * whiteout inode exists, so that the whiteout entries can be
297 	 * extracted.
298 	 */
299 	SETINO(WINO, dumpmap);
300 	/* 'r' restores don't call getvol() for tape 1, so mark it as read. */
301 	if (command == 'r')
302 		tapesread = 1;
303 }
304 
305 /*
306  * Prompt user to load a new dump volume.
307  * "Nextvol" is the next suggested volume to use.
308  * This suggested volume is enforced when doing full
309  * or incremental restores, but can be overridden by
310  * the user when only extracting a subset of the files.
311  */
312 void
313 getvol(long nextvol)
314 {
315 	int64_t prevtapea;
316 	long i, newvol, savecnt;
317 	union u_spcl tmpspcl;
318 #	define tmpbuf tmpspcl.s_spcl
319 	char buf[TP_BSIZE];
320 
321 	if (nextvol == 1) {
322 		tapesread = 0;
323 		gettingfile = 0;
324 	}
325 	prevtapea = tapeaddr;
326 	savecnt = blksread;
327 	if (pipein) {
328 		if (nextvol != 1) {
329 			panic("Changing volumes on pipe input?\n");
330 			/* Avoid looping if we couldn't ask the user. */
331 			if (yflag || ferror(terminal) || feof(terminal))
332 				done(1);
333 		}
334 		if (volno == 1)
335 			return;
336 		goto gethdr;
337 	}
338 again:
339 	if (pipein)
340 		done(1); /* pipes do not get a second chance */
341 	if (command == 'R' || command == 'r' || curfile.action != SKIP)
342 		newvol = nextvol;
343 	else
344 		newvol = 0;
345 	while (newvol <= 0) {
346 		if (tapesread == 0) {
347 			fprintf(stderr, "%s%s%s%s%s%s%s",
348 			    "You have not read any tapes yet.\n",
349 			    "If you are extracting just a few files,",
350 			    " start with the last volume\n",
351 			    "and work towards the first; restore",
352 			    " can quickly skip tapes that\n",
353 			    "have no further files to extract.",
354 			    " Otherwise, begin with volume 1.\n");
355 		} else {
356 			fprintf(stderr, "You have read volumes");
357 			strcpy(buf, ": ");
358 			for (i = 0; i < 32; i++)
359 				if (tapesread & (1 << i)) {
360 					fprintf(stderr, "%s%ld", buf, i + 1);
361 					strcpy(buf, ", ");
362 				}
363 			fprintf(stderr, "\n");
364 		}
365 		do	{
366 			fprintf(stderr, "Specify next volume #: ");
367 			(void) fflush(stderr);
368 			if (fgets(buf, BUFSIZ, terminal) == NULL)
369 				done(1);
370 		} while (buf[0] == '\n');
371 		newvol = atoi(buf);
372 		if (newvol <= 0) {
373 			fprintf(stderr,
374 			    "Volume numbers are positive numerics\n");
375 		}
376 	}
377 	if (newvol == volno) {
378 		tapesread |= 1 << (volno - 1);
379 		return;
380 	}
381 	closemt();
382 	fprintf(stderr, "Mount tape volume %ld\n", newvol);
383 	fprintf(stderr, "Enter ``none'' if there are no more tapes\n");
384 	fprintf(stderr, "otherwise enter tape name (default: %s) ", magtape);
385 	(void) fflush(stderr);
386 	if (fgets(buf, BUFSIZ, terminal) == NULL)
387 		done(1);
388 	if (!strcmp(buf, "none\n")) {
389 		terminateinput();
390 		return;
391 	}
392 	if (buf[0] != '\n') {
393 		(void) strcpy(magtape, buf);
394 		magtape[strlen(magtape) - 1] = '\0';
395 	}
396 	if (pipecmdin) {
397 		char volno[sizeof("2147483647")];
398 
399 		(void)sprintf(volno, "%ld", newvol);
400 		if (setenv("RESTORE_VOLUME", volno, 1) == -1) {
401 			fprintf(stderr, "Cannot set $RESTORE_VOLUME: %s\n",
402 			    strerror(errno));
403 			done(1);
404 		}
405 		popenfp = popen(magtape, "r");
406 		mt = popenfp ? fileno(popenfp) : -1;
407 	} else
408 #ifdef RRESTORE
409 	if (host)
410 		mt = rmtopen(magtape, 0);
411 	else
412 #endif
413 		mt = open(magtape, O_RDONLY, 0);
414 
415 	if (mt == -1) {
416 		fprintf(stderr, "Cannot open %s\n", magtape);
417 		volno = -1;
418 		goto again;
419 	}
420 gethdr:
421 	volno = newvol;
422 	setdumpnum();
423 	FLUSHTAPEBUF();
424 	if (gethead(&tmpbuf) == FAIL) {
425 		dprintf(stdout, "header read failed at %ld blocks\n", blksread);
426 		fprintf(stderr, "tape is not dump tape\n");
427 		volno = 0;
428 		goto again;
429 	}
430 	if (tmpbuf.c_volume != volno) {
431 		fprintf(stderr, "Wrong volume (%jd)\n",
432 		    (intmax_t)tmpbuf.c_volume);
433 		volno = 0;
434 		goto again;
435 	}
436 	if (_time64_to_time(tmpbuf.c_date) != dumpdate ||
437 	    _time64_to_time(tmpbuf.c_ddate) != dumptime) {
438 		time_t t = _time64_to_time(tmpbuf.c_date);
439 		fprintf(stderr, "Wrong dump date\n\tgot: %s", ctime(&t));
440 		fprintf(stderr, "\twanted: %s", ctime(&dumpdate));
441 		volno = 0;
442 		goto again;
443 	}
444 	tapesread |= 1 << (volno - 1);
445 	blksread = savecnt;
446  	/*
447  	 * If continuing from the previous volume, skip over any
448  	 * blocks read already at the end of the previous volume.
449  	 *
450  	 * If coming to this volume at random, skip to the beginning
451  	 * of the next record.
452  	 */
453 	dprintf(stdout, "last rec %jd, tape starts with %jd\n",
454 	    (intmax_t)prevtapea, (intmax_t)tmpbuf.c_tapea);
455  	if (tmpbuf.c_type == TS_TAPE) {
456  		if (curfile.action != USING) {
457 			/*
458 			 * XXX Dump incorrectly sets c_count to 1 in the
459 			 * volume header of the first tape, so ignore
460 			 * c_count when volno == 1.
461 			 */
462 			if (volno != 1)
463 				for (i = tmpbuf.c_count; i > 0; i--)
464 					readtape(buf);
465  		} else if (tmpbuf.c_tapea <= prevtapea) {
466 			/*
467 			 * Normally the value of c_tapea in the volume
468 			 * header is the record number of the header itself.
469 			 * However in the volume header following an EOT-
470 			 * terminated tape, it is the record number of the
471 			 * first continuation data block (dump bug?).
472 			 *
473 			 * The next record we want is `prevtapea + 1'.
474 			 */
475  			i = prevtapea + 1 - tmpbuf.c_tapea;
476 			dprintf(stderr, "Skipping %ld duplicate record%s.\n",
477 				i, i > 1 ? "s" : "");
478  			while (--i >= 0)
479  				readtape(buf);
480  		}
481  	}
482 	if (curfile.action == USING) {
483 		if (volno == 1)
484 			panic("active file into volume 1\n");
485 		return;
486 	}
487 	(void) gethead(&spcl);
488 	findinode(&spcl);
489 	if (gettingfile) {
490 		gettingfile = 0;
491 		longjmp(restart, 1);
492 	}
493 }
494 
495 /*
496  * Handle unexpected EOF.
497  */
498 static void
499 terminateinput(void)
500 {
501 
502 	if (gettingfile && curfile.action == USING) {
503 		printf("Warning: %s %s\n",
504 		    "End-of-input encountered while extracting", curfile.name);
505 	}
506 	curfile.name = "<name unknown>";
507 	curfile.action = UNKNOWN;
508 	curfile.mode = 0;
509 	curfile.ino = maxino;
510 	if (gettingfile) {
511 		gettingfile = 0;
512 		longjmp(restart, 1);
513 	}
514 }
515 
516 /*
517  * handle multiple dumps per tape by skipping forward to the
518  * appropriate one.
519  */
520 static void
521 setdumpnum(void)
522 {
523 	struct mtop tcom;
524 
525 	if (dumpnum == 1 || volno != 1)
526 		return;
527 	if (pipein) {
528 		fprintf(stderr, "Cannot have multiple dumps on pipe input\n");
529 		done(1);
530 	}
531 	tcom.mt_op = MTFSF;
532 	tcom.mt_count = dumpnum - 1;
533 #ifdef RRESTORE
534 	if (host)
535 		rmtioctl(MTFSF, dumpnum - 1);
536 	else
537 #endif
538 		if (!pipecmdin && ioctl(mt, MTIOCTOP, (char *)&tcom) < 0)
539 			fprintf(stderr, "ioctl MTFSF: %s\n", strerror(errno));
540 }
541 
542 void
543 printdumpinfo(void)
544 {
545 	time_t t;
546 	t = _time64_to_time(spcl.c_date);
547 	fprintf(stdout, "Dump   date: %s", ctime(&t));
548 	t = _time64_to_time(spcl.c_ddate);
549 	fprintf(stdout, "Dumped from: %s",
550 	    (spcl.c_ddate == 0) ? "the epoch\n" : ctime(&t));
551 	if (spcl.c_host[0] == '\0')
552 		return;
553 	fprintf(stderr, "Level %jd dump of %s on %s:%s\n",
554 	    (intmax_t)spcl.c_level, spcl.c_filesys, spcl.c_host, spcl.c_dev);
555 	fprintf(stderr, "Label: %s\n", spcl.c_label);
556 }
557 
558 int
559 extractfile(char *name)
560 {
561 	int flags;
562 	uid_t uid;
563 	gid_t gid;
564 	mode_t mode;
565 	int extsize;
566 	struct timeval mtimep[2], ctimep[2];
567 	struct entry *ep;
568 	char *buf;
569 
570 	curfile.name = name;
571 	curfile.action = USING;
572 	mtimep[0].tv_sec = curfile.atime_sec;
573 	mtimep[0].tv_usec = curfile.atime_nsec / 1000;
574 	mtimep[1].tv_sec = curfile.mtime_sec;
575 	mtimep[1].tv_usec = curfile.mtime_nsec / 1000;
576 	ctimep[0].tv_sec = curfile.atime_sec;
577 	ctimep[0].tv_usec = curfile.atime_nsec / 1000;
578 	ctimep[1].tv_sec = curfile.birthtime_sec;
579 	ctimep[1].tv_usec = curfile.birthtime_nsec / 1000;
580 	extsize = curfile.extsize;
581 	uid = getuid();
582 	if (uid == 0)
583 		uid = curfile.uid;
584 	gid = curfile.gid;
585 	mode = curfile.mode;
586 	flags = curfile.file_flags;
587 	switch (mode & IFMT) {
588 
589 	default:
590 		fprintf(stderr, "%s: unknown file mode 0%o\n", name, mode);
591 		skipfile();
592 		return (FAIL);
593 
594 	case IFSOCK:
595 		vprintf(stdout, "skipped socket %s\n", name);
596 		skipfile();
597 		return (GOOD);
598 
599 	case IFDIR:
600 		if (mflag) {
601 			ep = lookupname(name);
602 			if (ep == NULL || ep->e_flags & EXTRACT)
603 				panic("unextracted directory %s\n", name);
604 			skipfile();
605 			return (GOOD);
606 		}
607 		vprintf(stdout, "extract file %s\n", name);
608 		return (genliteraldir(name, curfile.ino));
609 
610 	case IFLNK:
611 		lnkbuf[0] = '\0';
612 		pathlen = 0;
613 		buf = setupextattr(extsize);
614 		getfile(xtrlnkfile, xtrattr, xtrlnkskip);
615 		if (pathlen == 0) {
616 			vprintf(stdout,
617 			    "%s: zero length symbolic link (ignored)\n", name);
618 			return (GOOD);
619 		}
620 		if (linkit(lnkbuf, name, SYMLINK) == GOOD) {
621 			if (extsize > 0)
622 				set_extattr_link(name, buf, extsize);
623 			(void) lchown(name, uid, gid);
624 			(void) lchmod(name, mode);
625 			(void) lutimes(name, ctimep);
626 			(void) lutimes(name, mtimep);
627 			(void) lchflags(name, flags);
628 			return (GOOD);
629 		}
630 		return (FAIL);
631 
632 	case IFIFO:
633 		vprintf(stdout, "extract fifo %s\n", name);
634 		if (Nflag) {
635 			skipfile();
636 			return (GOOD);
637 		}
638 		if (uflag)
639 			(void) unlink(name);
640 		if (mkfifo(name, 0600) < 0) {
641 			fprintf(stderr, "%s: cannot create fifo: %s\n",
642 			    name, strerror(errno));
643 			skipfile();
644 			return (FAIL);
645 		}
646 		if (extsize == 0) {
647 			skipfile();
648 		} else {
649 			buf = setupextattr(extsize);
650 			getfile(xtrnull, xtrattr, xtrnull);
651 			set_extattr_file(name, buf, extsize);
652 		}
653 		(void) chown(name, uid, gid);
654 		(void) chmod(name, mode);
655 		(void) utimes(name, ctimep);
656 		(void) utimes(name, mtimep);
657 		(void) chflags(name, flags);
658 		return (GOOD);
659 
660 	case IFCHR:
661 	case IFBLK:
662 		vprintf(stdout, "extract special file %s\n", name);
663 		if (Nflag) {
664 			skipfile();
665 			return (GOOD);
666 		}
667 		if (uflag)
668 			(void) unlink(name);
669 		if (mknod(name, (mode & (IFCHR | IFBLK)) | 0600,
670 		    (int)curfile.rdev) < 0) {
671 			fprintf(stderr, "%s: cannot create special file: %s\n",
672 			    name, strerror(errno));
673 			skipfile();
674 			return (FAIL);
675 		}
676 		if (extsize == 0) {
677 			skipfile();
678 		} else {
679 			buf = setupextattr(extsize);
680 			getfile(xtrnull, xtrattr, xtrnull);
681 			set_extattr_file(name, buf, extsize);
682 		}
683 		(void) chown(name, uid, gid);
684 		(void) chmod(name, mode);
685 		(void) utimes(name, ctimep);
686 		(void) utimes(name, mtimep);
687 		(void) chflags(name, flags);
688 		return (GOOD);
689 
690 	case IFREG:
691 		vprintf(stdout, "extract file %s\n", name);
692 		if (Nflag) {
693 			skipfile();
694 			return (GOOD);
695 		}
696 		if (uflag)
697 			(void) unlink(name);
698 		if ((ofile = open(name, O_WRONLY | O_CREAT | O_TRUNC,
699 		    0600)) < 0) {
700 			fprintf(stderr, "%s: cannot create file: %s\n",
701 			    name, strerror(errno));
702 			skipfile();
703 			return (FAIL);
704 		}
705 		buf = setupextattr(extsize);
706 		getfile(xtrfile, xtrattr, xtrskip);
707 		if (extsize > 0)
708 			set_extattr_fd(ofile, name, buf, extsize);
709 		(void) fchown(ofile, uid, gid);
710 		(void) fchmod(ofile, mode);
711 		(void) futimes(ofile, ctimep);
712 		(void) futimes(ofile, mtimep);
713 		(void) fchflags(ofile, flags);
714 		(void) close(ofile);
715 		return (GOOD);
716 	}
717 	/* NOTREACHED */
718 }
719 
720 /*
721  * Set attributes for a file.
722  */
723 void
724 set_extattr_file(char *name, void *buf, int size)
725 {
726 	struct extattr *eap, *eaend;
727 
728 	vprintf(stdout, "Set attributes for %s:", name);
729 	eaend = buf + size;
730 	for (eap = buf; eap < eaend; eap = EXTATTR_NEXT(eap)) {
731 		/*
732 		 * Make sure this entry is complete.
733 		 */
734 		if (EXTATTR_NEXT(eap) > eaend || eap->ea_length <= 0) {
735 			dprintf(stdout, "\n\t%scorrupted",
736 				eap == buf ? "" : "remainder ");
737 			break;
738 		}
739 		if (eap->ea_namespace == EXTATTR_NAMESPACE_EMPTY)
740 			continue;
741 		vprintf(stdout, "\n\t%s, (%d bytes), %*s",
742 			namespace_names[eap->ea_namespace], eap->ea_length,
743 			eap->ea_namelength, eap->ea_name);
744 		/*
745 		 * First we try the general attribute setting interface.
746 		 * However, some attributes can only be set by root or
747 		 * by using special interfaces (for example, ACLs).
748 		 */
749 		if (extattr_set_file(name, eap->ea_namespace, eap->ea_name,
750 		    EXTATTR_CONTENT(eap), EXTATTR_CONTENT_SIZE(eap)) != -1) {
751 			dprintf(stdout, " (set using extattr_set_file)");
752 			continue;
753 		}
754 		/*
755 		 * If the general interface refuses to set the attribute,
756 		 * then we try all the specialized interfaces that we
757 		 * know about.
758 		 */
759 		if (eap->ea_namespace == EXTATTR_NAMESPACE_SYSTEM &&
760 		    !strcmp(eap->ea_name, POSIX1E_ACL_ACCESS_EXTATTR_NAME)) {
761 			if (acl_set_file(name, ACL_TYPE_ACCESS,
762 			    EXTATTR_CONTENT(eap)) != -1) {
763 				dprintf(stdout, " (set using acl_set_file)");
764 				continue;
765 			}
766 		}
767 		if (eap->ea_namespace == EXTATTR_NAMESPACE_SYSTEM &&
768 		    !strcmp(eap->ea_name, POSIX1E_ACL_DEFAULT_EXTATTR_NAME)) {
769 			if (acl_set_file(name, ACL_TYPE_DEFAULT,
770 			    EXTATTR_CONTENT(eap)) != -1) {
771 				dprintf(stdout, " (set using acl_set_file)");
772 				continue;
773 			}
774 		}
775 		vprintf(stdout, " (unable to set)");
776 	}
777 	vprintf(stdout, "\n");
778 }
779 
780 /*
781  * Set attributes for a symbolic link.
782  */
783 static void
784 set_extattr_link(char *name, void *buf, int size)
785 {
786 	struct extattr *eap, *eaend;
787 
788 	vprintf(stdout, "Set attributes for %s:", name);
789 	eaend = buf + size;
790 	for (eap = buf; eap < eaend; eap = EXTATTR_NEXT(eap)) {
791 		/*
792 		 * Make sure this entry is complete.
793 		 */
794 		if (EXTATTR_NEXT(eap) > eaend || eap->ea_length <= 0) {
795 			dprintf(stdout, "\n\t%scorrupted",
796 				eap == buf ? "" : "remainder ");
797 			break;
798 		}
799 		if (eap->ea_namespace == EXTATTR_NAMESPACE_EMPTY)
800 			continue;
801 		vprintf(stdout, "\n\t%s, (%d bytes), %*s",
802 			namespace_names[eap->ea_namespace], eap->ea_length,
803 			eap->ea_namelength, eap->ea_name);
804 		/*
805 		 * First we try the general attribute setting interface.
806 		 * However, some attributes can only be set by root or
807 		 * by using special interfaces (for example, ACLs).
808 		 */
809 		if (extattr_set_link(name, eap->ea_namespace, eap->ea_name,
810 		    EXTATTR_CONTENT(eap), EXTATTR_CONTENT_SIZE(eap)) != -1) {
811 			dprintf(stdout, " (set using extattr_set_link)");
812 			continue;
813 		}
814 		/*
815 		 * If the general interface refuses to set the attribute,
816 		 * then we try all the specialized interfaces that we
817 		 * know about.
818 		 */
819 		if (eap->ea_namespace == EXTATTR_NAMESPACE_SYSTEM &&
820 		    !strcmp(eap->ea_name, POSIX1E_ACL_ACCESS_EXTATTR_NAME)) {
821 			if (acl_set_link_np(name, ACL_TYPE_ACCESS,
822 			    EXTATTR_CONTENT(eap)) != -1) {
823 				dprintf(stdout, " (set using acl_set_link_np)");
824 				continue;
825 			}
826 		}
827 		if (eap->ea_namespace == EXTATTR_NAMESPACE_SYSTEM &&
828 		    !strcmp(eap->ea_name, POSIX1E_ACL_DEFAULT_EXTATTR_NAME)) {
829 			if (acl_set_link_np(name, ACL_TYPE_DEFAULT,
830 			    EXTATTR_CONTENT(eap)) != -1) {
831 				dprintf(stdout, " (set using acl_set_link_np)");
832 				continue;
833 			}
834 		}
835 		vprintf(stdout, " (unable to set)");
836 	}
837 	vprintf(stdout, "\n");
838 }
839 
840 /*
841  * Set attributes on a file descriptor.
842  */
843 static void
844 set_extattr_fd(int fd, char *name, void *buf, int size)
845 {
846 	struct extattr *eap, *eaend;
847 
848 	vprintf(stdout, "Set attributes for %s:", name);
849 	eaend = buf + size;
850 	for (eap = buf; eap < eaend; eap = EXTATTR_NEXT(eap)) {
851 		/*
852 		 * Make sure this entry is complete.
853 		 */
854 		if (EXTATTR_NEXT(eap) > eaend || eap->ea_length <= 0) {
855 			dprintf(stdout, "\n\t%scorrupted",
856 				eap == buf ? "" : "remainder ");
857 			break;
858 		}
859 		if (eap->ea_namespace == EXTATTR_NAMESPACE_EMPTY)
860 			continue;
861 		vprintf(stdout, "\n\t%s, (%d bytes), %*s",
862 			namespace_names[eap->ea_namespace], eap->ea_length,
863 			eap->ea_namelength, eap->ea_name);
864 		/*
865 		 * First we try the general attribute setting interface.
866 		 * However, some attributes can only be set by root or
867 		 * by using special interfaces (for example, ACLs).
868 		 */
869 		if (extattr_set_fd(fd, eap->ea_namespace, eap->ea_name,
870 		    EXTATTR_CONTENT(eap), EXTATTR_CONTENT_SIZE(eap)) != -1) {
871 			dprintf(stdout, " (set using extattr_set_fd)");
872 			continue;
873 		}
874 		/*
875 		 * If the general interface refuses to set the attribute,
876 		 * then we try all the specialized interfaces that we
877 		 * know about.
878 		 */
879 		if (eap->ea_namespace == EXTATTR_NAMESPACE_SYSTEM &&
880 		    !strcmp(eap->ea_name, POSIX1E_ACL_ACCESS_EXTATTR_NAME)) {
881 			if (acl_set_fd(fd, EXTATTR_CONTENT(eap)) != -1) {
882 				dprintf(stdout, " (set using acl_set_fd)");
883 				continue;
884 			}
885 		}
886 		if (eap->ea_namespace == EXTATTR_NAMESPACE_SYSTEM &&
887 		    !strcmp(eap->ea_name, POSIX1E_ACL_DEFAULT_EXTATTR_NAME)) {
888 			if (acl_set_file(name, ACL_TYPE_DEFAULT,
889 			    EXTATTR_CONTENT(eap)) != -1) {
890 				dprintf(stdout, " (set using acl_set_file)");
891 				continue;
892 			}
893 		}
894 		vprintf(stdout, " (unable to set)");
895 	}
896 	vprintf(stdout, "\n");
897 }
898 
899 /*
900  * skip over bit maps on the tape
901  */
902 void
903 skipmaps(void)
904 {
905 
906 	while (spcl.c_type == TS_BITS || spcl.c_type == TS_CLRI)
907 		skipfile();
908 }
909 
910 /*
911  * skip over a file on the tape
912  */
913 void
914 skipfile(void)
915 {
916 
917 	curfile.action = SKIP;
918 	getfile(xtrnull, xtrnull, xtrnull);
919 }
920 
921 /*
922  * Extract a file from the tape.
923  * When an allocated block is found it is passed to the fill function;
924  * when an unallocated block (hole) is found, a zeroed buffer is passed
925  * to the skip function.
926  */
927 void
928 getfile(void (*datafill)(char *, long), void (*attrfill)(char *, long),
929 	void (*skip)(char *, long))
930 {
931 	int i;
932 	off_t size;
933 	int curblk, attrsize;
934 	void (*fillit)(char *, long);
935 	static char clearedbuf[MAXBSIZE];
936 	char buf[MAXBSIZE / TP_BSIZE][TP_BSIZE];
937 	char junk[TP_BSIZE];
938 
939 	curblk = 0;
940 	size = spcl.c_size;
941 	attrsize = spcl.c_extsize;
942 	if (spcl.c_type == TS_END)
943 		panic("ran off end of tape\n");
944 	if (spcl.c_magic != FS_UFS2_MAGIC)
945 		panic("not at beginning of a file\n");
946 	if (!gettingfile && setjmp(restart) != 0)
947 		return;
948 	gettingfile++;
949 	fillit = datafill;
950 	if (size == 0 && attrsize > 0) {
951 		fillit = attrfill;
952 		size = attrsize;
953 		attrsize = 0;
954 	}
955 loop:
956 	for (i = 0; i < spcl.c_count; i++) {
957 		if (!readmapflag && i > TP_NINDIR) {
958 			if (Dflag) {
959 				fprintf(stderr, "spcl.c_count = %jd\n",
960 				    (intmax_t)spcl.c_count);
961 				break;
962 			} else
963 				panic("spcl.c_count = %jd\n",
964 				    (intmax_t)spcl.c_count);
965 		}
966 		if (readmapflag || spcl.c_addr[i]) {
967 			readtape(&buf[curblk++][0]);
968 			if (curblk == fssize / TP_BSIZE) {
969 				(*fillit)((char *)buf, (long)(size > TP_BSIZE ?
970 				     fssize : (curblk - 1) * TP_BSIZE + size));
971 				curblk = 0;
972 			}
973 		} else {
974 			if (curblk > 0) {
975 				(*fillit)((char *)buf, (long)(size > TP_BSIZE ?
976 				     curblk * TP_BSIZE :
977 				     (curblk - 1) * TP_BSIZE + size));
978 				curblk = 0;
979 			}
980 			(*skip)(clearedbuf, (long)(size > TP_BSIZE ?
981 				TP_BSIZE : size));
982 		}
983 		if ((size -= TP_BSIZE) <= 0) {
984 			if (size > -TP_BSIZE && curblk > 0) {
985 				(*fillit)((char *)buf,
986 					(long)((curblk * TP_BSIZE) + size));
987 				curblk = 0;
988 			}
989 			if (attrsize > 0) {
990 				fillit = attrfill;
991 				size = attrsize;
992 				attrsize = 0;
993 				continue;
994 			}
995 			if (spcl.c_count - i > 1)
996 				dprintf(stdout, "skipping %d junk block(s)\n",
997 					spcl.c_count - i - 1);
998 			for (i++; i < spcl.c_count; i++) {
999 				if (!readmapflag && i > TP_NINDIR) {
1000 					if (Dflag) {
1001 						fprintf(stderr,
1002 						    "spcl.c_count = %jd\n",
1003 						    (intmax_t)spcl.c_count);
1004 						break;
1005 					} else
1006 						panic("spcl.c_count = %jd\n",
1007 						    (intmax_t)spcl.c_count);
1008 				}
1009 				if (readmapflag || spcl.c_addr[i])
1010 					readtape(junk);
1011 			}
1012 			break;
1013 		}
1014 	}
1015 	if (gethead(&spcl) == GOOD && size > 0) {
1016 		if (spcl.c_type == TS_ADDR)
1017 			goto loop;
1018 		dprintf(stdout,
1019 			"Missing address (header) block for %s at %ld blocks\n",
1020 			curfile.name, blksread);
1021 	}
1022 	if (curblk > 0)
1023 		panic("getfile: lost data\n");
1024 	findinode(&spcl);
1025 	gettingfile = 0;
1026 }
1027 
1028 /*
1029  * These variables are shared between the next two functions.
1030  */
1031 static int extbufsize = 0;
1032 static char *extbuf;
1033 static int extloc;
1034 
1035 /*
1036  * Allocate a buffer into which to extract extended attributes.
1037  */
1038 static char *
1039 setupextattr(int extsize)
1040 {
1041 
1042 	extloc = 0;
1043 	if (extsize <= extbufsize)
1044 		return (extbuf);
1045 	if (extbufsize > 0)
1046 		free(extbuf);
1047 	if ((extbuf = malloc(extsize)) != NULL) {
1048 		extbufsize = extsize;
1049 		return (extbuf);
1050 	}
1051 	extbufsize = 0;
1052 	extbuf = NULL;
1053 	fprintf(stderr, "Cannot extract %d bytes %s for inode %d, name %s\n",
1054 	    extsize, "of extended attributes", curfile.ino, curfile.name);
1055 	return (NULL);
1056 }
1057 
1058 /*
1059  * Extract the next block of extended attributes.
1060  */
1061 static void
1062 xtrattr(char *buf, long size)
1063 {
1064 
1065 	if (extloc + size > extbufsize)
1066 		panic("overrun attribute buffer\n");
1067 	memmove(&extbuf[extloc], buf, size);
1068 	extloc += size;
1069 }
1070 
1071 /*
1072  * Write out the next block of a file.
1073  */
1074 static void
1075 xtrfile(char *buf, long	size)
1076 {
1077 
1078 	if (Nflag)
1079 		return;
1080 	if (write(ofile, buf, (int) size) == -1) {
1081 		fprintf(stderr,
1082 		    "write error extracting inode %d, name %s\nwrite: %s\n",
1083 			curfile.ino, curfile.name, strerror(errno));
1084 	}
1085 }
1086 
1087 /*
1088  * Skip over a hole in a file.
1089  */
1090 /* ARGSUSED */
1091 static void
1092 xtrskip(char *buf, long size)
1093 {
1094 
1095 	if (lseek(ofile, size, SEEK_CUR) == -1) {
1096 		fprintf(stderr,
1097 		    "seek error extracting inode %d, name %s\nlseek: %s\n",
1098 			curfile.ino, curfile.name, strerror(errno));
1099 		done(1);
1100 	}
1101 }
1102 
1103 /*
1104  * Collect the next block of a symbolic link.
1105  */
1106 static void
1107 xtrlnkfile(char *buf, long size)
1108 {
1109 
1110 	pathlen += size;
1111 	if (pathlen > MAXPATHLEN) {
1112 		fprintf(stderr, "symbolic link name: %s->%s%s; too long %d\n",
1113 		    curfile.name, lnkbuf, buf, pathlen);
1114 		done(1);
1115 	}
1116 	(void) strcat(lnkbuf, buf);
1117 }
1118 
1119 /*
1120  * Skip over a hole in a symbolic link (should never happen).
1121  */
1122 /* ARGSUSED */
1123 static void
1124 xtrlnkskip(char *buf, long size)
1125 {
1126 
1127 	fprintf(stderr, "unallocated block in symbolic link %s\n",
1128 		curfile.name);
1129 	done(1);
1130 }
1131 
1132 /*
1133  * Collect the next block of a bit map.
1134  */
1135 static void
1136 xtrmap(char *buf, long size)
1137 {
1138 
1139 	memmove(map, buf, size);
1140 	map += size;
1141 }
1142 
1143 /*
1144  * Skip over a hole in a bit map (should never happen).
1145  */
1146 /* ARGSUSED */
1147 static void
1148 xtrmapskip(char *buf, long size)
1149 {
1150 
1151 	panic("hole in map\n");
1152 	map += size;
1153 }
1154 
1155 /*
1156  * Noop, when an extraction function is not needed.
1157  */
1158 /* ARGSUSED */
1159 void
1160 xtrnull(char *buf, long size)
1161 {
1162 
1163 	return;
1164 }
1165 
1166 /*
1167  * Read TP_BSIZE blocks from the input.
1168  * Handle read errors, and end of media.
1169  */
1170 static void
1171 readtape(char *buf)
1172 {
1173 	long rd, newvol, i, oldnumtrec;
1174 	int cnt, seek_failed;
1175 
1176 	if (blkcnt + (byteslide > 0) < numtrec) {
1177 		memmove(buf, &tapebuf[(blkcnt++ * TP_BSIZE) + byteslide], (long)TP_BSIZE);
1178 		blksread++;
1179 		tapeaddr++;
1180 		return;
1181 	}
1182 	if (numtrec > 0)
1183 		memmove(&tapebuf[-TP_BSIZE],
1184 		    &tapebuf[(numtrec-1) * TP_BSIZE], (long)TP_BSIZE);
1185 	oldnumtrec = numtrec;
1186 	for (i = 0; i < ntrec; i++)
1187 		((struct s_spcl *)&tapebuf[i * TP_BSIZE])->c_magic = 0;
1188 	if (numtrec == 0)
1189 		numtrec = ntrec;
1190 	cnt = ntrec * TP_BSIZE;
1191 	rd = 0;
1192 getmore:
1193 #ifdef RRESTORE
1194 	if (host)
1195 		i = rmtread(&tapebuf[rd], cnt);
1196 	else
1197 #endif
1198 		i = read(mt, &tapebuf[rd], cnt);
1199 	/*
1200 	 * Check for mid-tape short read error.
1201 	 * If found, skip rest of buffer and start with the next.
1202 	 */
1203 	if (!pipein && !pipecmdin && numtrec < ntrec && i > 0) {
1204 		dprintf(stdout, "mid-media short read error.\n");
1205 		numtrec = ntrec;
1206 	}
1207 	/*
1208 	 * Handle partial block read.
1209 	 */
1210 	if ((pipein || pipecmdin) && i == 0 && rd > 0)
1211 		i = rd;
1212 	else if (i > 0 && i != ntrec * TP_BSIZE) {
1213 		if (pipein || pipecmdin) {
1214 			rd += i;
1215 			cnt -= i;
1216 			if (cnt > 0)
1217 				goto getmore;
1218 			i = rd;
1219 		} else {
1220 			/*
1221 			 * Short read. Process the blocks read.
1222 			 */
1223 			if (i % TP_BSIZE != 0)
1224 				vprintf(stdout,
1225 				    "partial block read: %ld should be %ld\n",
1226 				    i, ntrec * TP_BSIZE);
1227 			numtrec = i / TP_BSIZE;
1228 		}
1229 	}
1230 	/*
1231 	 * Handle read error.
1232 	 */
1233 	if (i < 0) {
1234 		fprintf(stderr, "Tape read error while ");
1235 		switch (curfile.action) {
1236 		default:
1237 			fprintf(stderr, "trying to set up tape\n");
1238 			break;
1239 		case UNKNOWN:
1240 			fprintf(stderr, "trying to resynchronize\n");
1241 			break;
1242 		case USING:
1243 			fprintf(stderr, "restoring %s\n", curfile.name);
1244 			break;
1245 		case SKIP:
1246 			fprintf(stderr, "skipping over inode %d\n",
1247 				curfile.ino);
1248 			break;
1249 		}
1250 		if (!yflag && !reply("continue"))
1251 			done(1);
1252 		i = ntrec * TP_BSIZE;
1253 		memset(tapebuf, 0, i);
1254 #ifdef RRESTORE
1255 		if (host)
1256 			seek_failed = (rmtseek(i, 1) < 0);
1257 		else
1258 #endif
1259 			seek_failed = (lseek(mt, i, SEEK_CUR) == (off_t)-1);
1260 
1261 		if (seek_failed) {
1262 			fprintf(stderr,
1263 			    "continuation failed: %s\n", strerror(errno));
1264 			done(1);
1265 		}
1266 	}
1267 	/*
1268 	 * Handle end of tape.
1269 	 */
1270 	if (i == 0) {
1271 		vprintf(stdout, "End-of-tape encountered\n");
1272 		if (!pipein) {
1273 			newvol = volno + 1;
1274 			volno = 0;
1275 			numtrec = 0;
1276 			getvol(newvol);
1277 			readtape(buf);
1278 			return;
1279 		}
1280 		if (rd % TP_BSIZE != 0)
1281 			panic("partial block read: %ld should be %ld\n",
1282 				rd, ntrec * TP_BSIZE);
1283 		terminateinput();
1284 		memmove(&tapebuf[rd], &endoftapemark, (long)TP_BSIZE);
1285 	}
1286 	if (oldnumtrec == 0)
1287 		blkcnt = 0;
1288 	else
1289 		blkcnt -= oldnumtrec;
1290 	memmove(buf,
1291 	    &tapebuf[(blkcnt++ * TP_BSIZE) + byteslide], (long)TP_BSIZE);
1292 	blksread++;
1293 	tapeaddr++;
1294 }
1295 
1296 static void
1297 findtapeblksize(void)
1298 {
1299 	long i;
1300 
1301 	for (i = 0; i < ntrec; i++)
1302 		((struct s_spcl *)&tapebuf[i * TP_BSIZE])->c_magic = 0;
1303 	blkcnt = 0;
1304 #ifdef RRESTORE
1305 	if (host)
1306 		i = rmtread(tapebuf, ntrec * TP_BSIZE);
1307 	else
1308 #endif
1309 		i = read(mt, tapebuf, ntrec * TP_BSIZE);
1310 
1311 	if (i <= 0) {
1312 		fprintf(stderr, "tape read error: %s\n", strerror(errno));
1313 		done(1);
1314 	}
1315 	if (i % TP_BSIZE != 0) {
1316 		fprintf(stderr, "Tape block size (%ld) %s (%d)\n",
1317 			i, "is not a multiple of dump block size", TP_BSIZE);
1318 		done(1);
1319 	}
1320 	ntrec = i / TP_BSIZE;
1321 	numtrec = ntrec;
1322 	vprintf(stdout, "Tape block size is %ld\n", ntrec);
1323 }
1324 
1325 void
1326 closemt(void)
1327 {
1328 
1329 	if (mt < 0)
1330 		return;
1331 	if (pipecmdin) {
1332 		pclose(popenfp);
1333 		popenfp = NULL;
1334 	} else
1335 #ifdef RRESTORE
1336 	if (host)
1337 		rmtclose();
1338 	else
1339 #endif
1340 		(void) close(mt);
1341 }
1342 
1343 /*
1344  * Read the next block from the tape.
1345  * If it is not any valid header, return an error.
1346  */
1347 static int
1348 gethead(struct s_spcl *buf)
1349 {
1350 	long i;
1351 
1352 	readtape((char *)buf);
1353 	if (buf->c_magic != FS_UFS2_MAGIC && buf->c_magic != NFS_MAGIC) {
1354 		if (buf->c_magic == OFS_MAGIC) {
1355 			fprintf(stderr,
1356 			    "Format of dump tape is too old. Must use\n");
1357 			fprintf(stderr,
1358 			    "a version of restore from before 2002.\n");
1359 			return (FAIL);
1360 		}
1361 		if (swabl(buf->c_magic) != FS_UFS2_MAGIC &&
1362 		    buf->c_magic != NFS_MAGIC) {
1363 			if (buf->c_magic == OFS_MAGIC) {
1364 				fprintf(stderr,
1365 				  "Format of dump tape is too old. Must use\n");
1366 				fprintf(stderr,
1367 				  "a version of restore from before 2002.\n");
1368 			}
1369 			return (FAIL);
1370 		}
1371 		if (!Bcvt) {
1372 			vprintf(stdout, "Note: Doing Byte swapping\n");
1373 			Bcvt = 1;
1374 		}
1375 	}
1376 	if (checksum((int *)buf) == FAIL)
1377 		return (FAIL);
1378 	if (Bcvt) {
1379 		swabst((u_char *)"8l4s1q8l2q17l", (u_char *)buf);
1380 		swabst((u_char *)"l",(u_char *) &buf->c_level);
1381 		swabst((u_char *)"2l4q",(u_char *) &buf->c_flags);
1382 	}
1383 	readmapflag = 0;
1384 
1385 	switch (buf->c_type) {
1386 
1387 	case TS_CLRI:
1388 	case TS_BITS:
1389 		/*
1390 		 * Have to patch up missing information in bit map headers
1391 		 */
1392 		buf->c_size = buf->c_count * TP_BSIZE;
1393 		if (buf->c_count > TP_NINDIR)
1394 			readmapflag = 1;
1395 		else
1396 			for (i = 0; i < buf->c_count; i++)
1397 				buf->c_addr[i]++;
1398 		/* FALL THROUGH */
1399 
1400 	case TS_TAPE:
1401 		if (buf->c_magic == NFS_MAGIC &&
1402 		    (buf->c_flags & NFS_DR_NEWINODEFMT) == 0)
1403 			oldinofmt = 1;
1404 		/* FALL THROUGH */
1405 
1406 	case TS_END:
1407 		buf->c_inumber = 0;
1408 		/* FALL THROUGH */
1409 
1410 	case TS_ADDR:
1411 	case TS_INODE:
1412 		/*
1413 		 * For old dump tapes, have to copy up old fields to
1414 		 * new locations.
1415 		 */
1416 		if (buf->c_magic == NFS_MAGIC) {
1417 			buf->c_tapea = buf->c_old_tapea;
1418 			buf->c_firstrec = buf->c_old_firstrec;
1419 			buf->c_date = _time32_to_time(buf->c_old_date);
1420 			buf->c_ddate = _time32_to_time(buf->c_old_ddate);
1421 			buf->c_atime = _time32_to_time(buf->c_old_atime);
1422 			buf->c_mtime = _time32_to_time(buf->c_old_mtime);
1423 			buf->c_birthtime = 0;
1424 			buf->c_birthtimensec = 0;
1425 			buf->c_extsize = 0;
1426 		}
1427 		break;
1428 
1429 	default:
1430 		panic("gethead: unknown inode type %d\n", buf->c_type);
1431 		break;
1432 	}
1433 	if (dumpdate != 0 && _time64_to_time(buf->c_date) != dumpdate)
1434 		fprintf(stderr, "Header with wrong dumpdate.\n");
1435 	/*
1436 	 * If we're restoring a filesystem with the old (FreeBSD 1)
1437 	 * format inodes, copy the uid/gid to the new location
1438 	 */
1439 	if (oldinofmt) {
1440 		buf->c_uid = buf->c_spare1[1];
1441 		buf->c_gid = buf->c_spare1[2];
1442 	}
1443 	buf->c_magic = FS_UFS2_MAGIC;
1444 	tapeaddr = buf->c_tapea;
1445 	if (dflag)
1446 		accthdr(buf);
1447 	return(GOOD);
1448 }
1449 
1450 /*
1451  * Check that a header is where it belongs and predict the next header
1452  */
1453 static void
1454 accthdr(struct s_spcl *header)
1455 {
1456 	static ino_t previno = 0x7fffffff;
1457 	static int prevtype;
1458 	static long predict;
1459 	long blks, i;
1460 
1461 	if (header->c_type == TS_TAPE) {
1462 		fprintf(stderr, "Volume header ");
1463  		if (header->c_firstrec)
1464  			fprintf(stderr, "begins with record %jd",
1465 			    (intmax_t)header->c_firstrec);
1466  		fprintf(stderr, "\n");
1467 		previno = 0x7fffffff;
1468 		return;
1469 	}
1470 	if (previno == 0x7fffffff)
1471 		goto newcalc;
1472 	switch (prevtype) {
1473 	case TS_BITS:
1474 		fprintf(stderr, "Dumped inodes map header");
1475 		break;
1476 	case TS_CLRI:
1477 		fprintf(stderr, "Used inodes map header");
1478 		break;
1479 	case TS_INODE:
1480 		fprintf(stderr, "File header, ino %d", previno);
1481 		break;
1482 	case TS_ADDR:
1483 		fprintf(stderr, "File continuation header, ino %d", previno);
1484 		break;
1485 	case TS_END:
1486 		fprintf(stderr, "End of tape header");
1487 		break;
1488 	}
1489 	if (predict != blksread - 1)
1490 		fprintf(stderr, "; predicted %ld blocks, got %ld blocks",
1491 			predict, blksread - 1);
1492 	fprintf(stderr, "\n");
1493 newcalc:
1494 	blks = 0;
1495 	if (header->c_type != TS_END)
1496 		for (i = 0; i < header->c_count; i++)
1497 			if (readmapflag || header->c_addr[i] != 0)
1498 				blks++;
1499 	predict = blks;
1500 	blksread = 0;
1501 	prevtype = header->c_type;
1502 	previno = header->c_inumber;
1503 }
1504 
1505 /*
1506  * Find an inode header.
1507  * Complain if had to skip.
1508  */
1509 static void
1510 findinode(struct s_spcl *header)
1511 {
1512 	static long skipcnt = 0;
1513 	long i;
1514 	char buf[TP_BSIZE];
1515 	int htype;
1516 
1517 	curfile.name = "<name unknown>";
1518 	curfile.action = UNKNOWN;
1519 	curfile.mode = 0;
1520 	curfile.ino = 0;
1521 	do {
1522 		htype = header->c_type;
1523 		switch (htype) {
1524 
1525 		case TS_ADDR:
1526 			/*
1527 			 * Skip up to the beginning of the next record
1528 			 */
1529 			for (i = 0; i < header->c_count; i++)
1530 				if (header->c_addr[i])
1531 					readtape(buf);
1532 			while (gethead(header) == FAIL ||
1533 			    _time64_to_time(header->c_date) != dumpdate) {
1534 				skipcnt++;
1535 				if (Dflag) {
1536 					byteslide++;
1537 					if (byteslide < TP_BSIZE) {
1538 						blkcnt--;
1539 						blksread--;
1540 					} else
1541 						byteslide = 0;
1542 				}
1543 			}
1544 			break;
1545 
1546 		case TS_INODE:
1547 			curfile.mode = header->c_mode;
1548 			curfile.uid = header->c_uid;
1549 			curfile.gid = header->c_gid;
1550 			curfile.file_flags = header->c_file_flags;
1551 			curfile.rdev = header->c_rdev;
1552 			curfile.atime_sec = header->c_atime;
1553 			curfile.atime_nsec = header->c_atimensec;
1554 			curfile.mtime_sec = header->c_mtime;
1555 			curfile.mtime_nsec = header->c_mtimensec;
1556 			curfile.birthtime_sec = header->c_birthtime;
1557 			curfile.birthtime_nsec = header->c_birthtimensec;
1558 			curfile.extsize = header->c_extsize;
1559 			curfile.size = header->c_size;
1560 			curfile.ino = header->c_inumber;
1561 			break;
1562 
1563 		case TS_END:
1564 			/* If we missed some tapes, get another volume. */
1565 			if (tapesread & (tapesread + 1)) {
1566 				getvol(0);
1567 				continue;
1568 			}
1569 			curfile.ino = maxino;
1570 			break;
1571 
1572 		case TS_CLRI:
1573 			curfile.name = "<file removal list>";
1574 			break;
1575 
1576 		case TS_BITS:
1577 			curfile.name = "<file dump list>";
1578 			break;
1579 
1580 		case TS_TAPE:
1581 			if (Dflag)
1582 				fprintf(stderr, "unexpected tape header\n");
1583 			else
1584 				panic("unexpected tape header\n");
1585 
1586 		default:
1587 			if (Dflag)
1588 				fprintf(stderr, "unknown tape header type %d\n",
1589 				    spcl.c_type);
1590 			else
1591 				panic("unknown tape header type %d\n",
1592 				    spcl.c_type);
1593 			while (gethead(header) == FAIL ||
1594 			    _time64_to_time(header->c_date) != dumpdate) {
1595 				skipcnt++;
1596 				if (Dflag) {
1597 					byteslide++;
1598 					if (byteslide < TP_BSIZE) {
1599 						blkcnt--;
1600 						blksread--;
1601 					} else
1602 						byteslide = 0;
1603 				}
1604 			}
1605 
1606 		}
1607 	} while (htype == TS_ADDR);
1608 	if (skipcnt > 0)
1609 		fprintf(stderr, "resync restore, skipped %ld %s\n",
1610 		    skipcnt, Dflag ? "bytes" : "blocks");
1611 	skipcnt = 0;
1612 }
1613 
1614 static int
1615 checksum(int *buf)
1616 {
1617 	int i, j;
1618 
1619 	j = sizeof(union u_spcl) / sizeof(int);
1620 	i = 0;
1621 	if (!Bcvt) {
1622 		do
1623 			i += *buf++;
1624 		while (--j);
1625 	} else {
1626 		/* What happens if we want to read restore tapes
1627 			for a 16bit int machine??? */
1628 		do
1629 			i += swabl(*buf++);
1630 		while (--j);
1631 	}
1632 
1633 	if (i != CHECKSUM) {
1634 		fprintf(stderr, "Checksum error %o, inode %d file %s\n", i,
1635 			curfile.ino, curfile.name);
1636 		return(FAIL);
1637 	}
1638 	return(GOOD);
1639 }
1640 
1641 #ifdef RRESTORE
1642 #include <stdarg.h>
1643 
1644 void
1645 msg(const char *fmt, ...)
1646 {
1647 	va_list ap;
1648 	va_start(ap, fmt);
1649 	(void)vfprintf(stderr, fmt, ap);
1650 	va_end(ap);
1651 }
1652 #endif /* RRESTORE */
1653 
1654 static u_char *
1655 swabshort(u_char *sp, int n)
1656 {
1657 	char c;
1658 
1659 	while (--n >= 0) {
1660 		c = sp[0]; sp[0] = sp[1]; sp[1] = c;
1661 		sp += 2;
1662 	}
1663 	return (sp);
1664 }
1665 
1666 static u_char *
1667 swablong(u_char *sp, int n)
1668 {
1669 	char c;
1670 
1671 	while (--n >= 0) {
1672 		c = sp[0]; sp[0] = sp[3]; sp[3] = c;
1673 		c = sp[2]; sp[2] = sp[1]; sp[1] = c;
1674 		sp += 4;
1675 	}
1676 	return (sp);
1677 }
1678 
1679 static u_char *
1680 swabquad(u_char *sp, int n)
1681 {
1682 	char c;
1683 
1684 	while (--n >= 0) {
1685 		c = sp[0]; sp[0] = sp[7]; sp[7] = c;
1686 		c = sp[1]; sp[1] = sp[6]; sp[6] = c;
1687 		c = sp[2]; sp[2] = sp[5]; sp[5] = c;
1688 		c = sp[3]; sp[3] = sp[4]; sp[4] = c;
1689 		sp += 8;
1690 	}
1691 	return (sp);
1692 }
1693 
1694 void
1695 swabst(u_char *cp, u_char *sp)
1696 {
1697 	int n = 0;
1698 
1699 	while (*cp) {
1700 		switch (*cp) {
1701 		case '0': case '1': case '2': case '3': case '4':
1702 		case '5': case '6': case '7': case '8': case '9':
1703 			n = (n * 10) + (*cp++ - '0');
1704 			continue;
1705 
1706 		case 's': case 'w': case 'h':
1707 			if (n == 0)
1708 				n = 1;
1709 			sp = swabshort(sp, n);
1710 			break;
1711 
1712 		case 'l':
1713 			if (n == 0)
1714 				n = 1;
1715 			sp = swablong(sp, n);
1716 			break;
1717 
1718 		case 'q':
1719 			if (n == 0)
1720 				n = 1;
1721 			sp = swabquad(sp, n);
1722 			break;
1723 
1724 		case 'b':
1725 			if (n == 0)
1726 				n = 1;
1727 			sp += n;
1728 			break;
1729 
1730 		default:
1731 			fprintf(stderr, "Unknown conversion character: %c\n",
1732 			    *cp);
1733 			done(0);
1734 			break;
1735 		}
1736 		cp++;
1737 		n = 0;
1738 	}
1739 }
1740 
1741 static u_long
1742 swabl(u_long x)
1743 {
1744 	swabst((u_char *)"l", (u_char *)&x);
1745 	return (x);
1746 }
1747