1/*	$NetBSD: tape.c,v 1.65 2011/08/06 20:46:42 dholland Exp $	*/
2
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#include <sys/cdefs.h>
38#ifndef lint
39#if 0
40static char sccsid[] = "@(#)tape.c	8.9 (Berkeley) 5/1/95";
41#else
42__RCSID("$NetBSD: tape.c,v 1.65 2011/08/06 20:46:42 dholland Exp $");
43#endif
44#endif /* not lint */
45
46#include <sys/param.h>
47#include <sys/file.h>
48#include <sys/ioctl.h>
49#include <sys/mtio.h>
50#include <sys/stat.h>
51
52#include <ufs/ufs/dinode.h>
53#include <protocols/dumprestore.h>
54
55#include <err.h>
56#include <errno.h>
57#include <paths.h>
58#include <setjmp.h>
59#include <stdio.h>
60#include <stdlib.h>
61#include <string.h>
62#include <time.h>
63#include <unistd.h>
64
65#include <md5.h>
66#include <rmd160.h>
67#include <sha1.h>
68
69#include "restore.h"
70#include "extern.h"
71
72static u_int32_t fssize = MAXBSIZE;
73static int	mt = -1;
74static int	pipein = 0;
75static char	magtape[BUFSIZ];
76static int	blkcnt;
77static int	numtrec;
78static char	*tapebuf;
79static union	u_spcl endoftapemark;
80static int	blksread;		/* blocks read since last header */
81static int	tpblksread = 0;		/* TP_BSIZE blocks read */
82static int	tapesread;
83static jmp_buf	restart;
84static int	gettingfile = 0;	/* restart has a valid frame */
85#ifdef RRESTORE
86static const char *host = NULL;
87#endif
88
89static int	ofile;
90static char	lnkbuf[MAXPATHLEN + 1];
91static int	pathlen;
92
93int		oldinofmt;	/* old inode format conversion required */
94int		Bcvt;		/* Swap Bytes (for CCI or sun) */
95
96const struct digest_desc *ddesc;
97
98static union digest_context {
99	MD5_CTX dc_MD5;
100	SHA1_CTX dc_SHA1;
101	RMD160_CTX dc_RMD160;
102} dcontext;
103
104/*
105 * 32 for md5; 40 for sha1 and rmd160
106 * plus a null terminator.
107 */
108#define DIGEST_BUFFER_SIZE (40 + 1)
109
110#define	FLUSHTAPEBUF()	blkcnt = ntrec + 1
111
112union u_ospcl {
113	char dummy[TP_BSIZE];
114	struct	s_ospcl {
115		int32_t   c_type;
116		int32_t   c_date;
117		int32_t   c_ddate;
118		int32_t   c_volume;
119		int32_t   c_tapea;
120		u_int16_t c_inumber;
121		int32_t   c_magic;
122		int32_t   c_checksum;
123		struct odinode {
124			unsigned short odi_mode;
125			u_int16_t odi_nlink;
126			u_int16_t odi_uid;
127			u_int16_t odi_gid;
128			int32_t   odi_size;
129			int32_t   odi_rdev;
130			char      odi_addr[36];
131			int32_t   odi_atime;
132			int32_t   odi_mtime;
133			int32_t   odi_ctime;
134		} c_odinode;
135		int32_t c_count;
136		char    c_addr[256];
137	} s_ospcl;
138};
139
140static void	 accthdr(struct s_spcl *);
141static int	 checksum(int *);
142static void	 findinode(struct s_spcl *);
143static void	 findtapeblksize(void);
144static void	 getbitmap(char **);
145static int	 gethead(struct s_spcl *);
146static void	 readtape(char *);
147static void	 setdumpnum(void);
148static void	 terminateinput(void);
149static void	 xtrfile(char *, long);
150static void	 xtrlnkfile(char *, long);
151__dead static void	 xtrlnkskip(char *, long);
152static void	 xtrskip(char *, long);
153static void	 swap_header(struct s_spcl *);
154static void	 swap_old_header(struct s_ospcl *);
155
156////////////////////////////////////////////////////////////
157// thunks for type correctness
158
159#define WRAP(alg) \
160	static void							\
161	do_##alg##Init(void *ctx)					\
162	{								\
163		alg##Init(ctx);						\
164	}								\
165									\
166	static void							\
167	do_##alg##Update(union digest_context *ctx,			\
168		const void *buf, unsigned len)				\
169	{								\
170		alg##Update(&ctx->dc_##alg, buf, len);			\
171	}								\
172									\
173	static char *							\
174	do_##alg##End(void *ctx, char *str)				\
175	{								\
176		return alg##End(ctx, str);				\
177	}
178
179WRAP(MD5);
180WRAP(SHA1);
181WRAP(RMD160);
182
183static const struct digest_desc digest_descs[] = {
184	{ "MD5",
185	  do_MD5Init,
186	  do_MD5Update,
187	  do_MD5End, },
188	{ "SHA1",
189	  do_SHA1Init,
190	  do_SHA1Update,
191	  do_SHA1End, },
192	{ "RMD160",
193	  do_RMD160Init,
194	  do_RMD160Update,
195	  do_RMD160End, },
196	{ .dd_name = NULL },
197};
198
199////////////////////////////////////////////////////////////
200
201const struct digest_desc *
202digest_lookup(const char *name)
203{
204	const struct digest_desc *dd;
205
206	for (dd = digest_descs; dd->dd_name != NULL; dd++)
207		if (strcasecmp(dd->dd_name, name) == 0)
208			return (dd);
209
210	return (NULL);
211}
212
213/*
214 * Set up an input source
215 */
216void
217setinput(const char *source)
218{
219	char *cp;
220	FLUSHTAPEBUF();
221	if (bflag)
222		newtapebuf(ntrec);
223	else
224		newtapebuf(NTREC > HIGHDENSITYTREC ? NTREC : HIGHDENSITYTREC);
225	terminal = stdin;
226
227#ifdef RRESTORE
228	if ((cp = strchr(source, ':')) != NULL) {
229		host = source;
230		/* Ok, because const strings don't have : */
231		*cp++ = '\0';
232		source = cp;
233		if (rmthost(host) == 0)
234			exit(1);
235	} else
236#endif
237	if (strcmp(source, "-") == 0) {
238		/*
239		 * Since input is coming from a pipe we must establish
240		 * our own connection to the terminal.
241		 */
242		terminal = fopen(_PATH_TTY, "r");
243		if (terminal == NULL) {
244			(void)fprintf(stderr, "cannot open %s: %s\n",
245			    _PATH_TTY, strerror(errno));
246			terminal = fopen(_PATH_DEVNULL, "r");
247			if (terminal == NULL) {
248				(void)fprintf(stderr, "cannot open %s: %s\n",
249				    _PATH_DEVNULL, strerror(errno));
250				exit(1);
251			}
252		}
253		pipein++;
254	}
255	(void) strcpy(magtape, source);
256}
257
258void
259newtapebuf(long size)
260{
261	static int tapebufsize = -1;
262
263	ntrec = size;
264	if (size <= tapebufsize)
265		return;
266	if (tapebuf != NULL)
267		free(tapebuf);
268	tapebuf = malloc(size * TP_BSIZE);
269	if (tapebuf == NULL) {
270		fprintf(stderr, "Cannot allocate space for tape buffer\n");
271		exit(1);
272	}
273	tapebufsize = size;
274}
275
276/*
277 * Verify that the tape drive can be accessed and
278 * that it actually is a dump tape.
279 */
280void
281setup(void)
282{
283	int i, j, *ip;
284	struct stat stbuf;
285
286	vprintf(stdout, "Verify tape and initialize maps\n");
287#ifdef RRESTORE
288	if (host)
289		mt = rmtopen(magtape, 0, 0);
290	else
291#endif
292	if (pipein)
293		mt = 0;
294	else
295		mt = open(magtape, O_RDONLY, 0);
296	if (mt < 0) {
297		fprintf(stderr, "%s: %s\n", magtape, strerror(errno));
298		exit(1);
299	}
300	volno = 1;
301	setdumpnum();
302	FLUSHTAPEBUF();
303	if (!pipein && !bflag)
304		findtapeblksize();
305	if (gethead(&spcl) == FAIL) {
306		blkcnt--; /* push back this block */
307		blksread--;
308		tpblksread--;
309		cvtflag++;
310		if (gethead(&spcl) == FAIL) {
311			fprintf(stderr, "Tape is not a dump tape\n");
312			exit(1);
313		}
314		fprintf(stderr, "Converting to new file system format.\n");
315	}
316	if (pipein) {
317		endoftapemark.s_spcl.c_magic = cvtflag ? OFS_MAGIC :
318		    FS_UFS2_MAGIC;
319		endoftapemark.s_spcl.c_type = TS_END;
320		ip = (int *)&endoftapemark;
321		j = sizeof(union u_spcl) / sizeof(int);
322		i = 0;
323		do
324			i += *ip++;
325		while (--j);
326		endoftapemark.s_spcl.c_checksum = CHECKSUM - i;
327	}
328	if (vflag || command == 't')
329		printdumpinfo();
330	dumptime = spcl.c_ddate;
331	dumpdate = spcl.c_date;
332	if (stat(".", &stbuf) < 0) {
333		fprintf(stderr, "cannot stat .: %s\n", strerror(errno));
334		exit(1);
335	}
336	if (stbuf.st_blksize >= TP_BSIZE && stbuf.st_blksize <= MAXBSIZE)
337		fssize = stbuf.st_blksize;
338	if (((fssize - 1) & fssize) != 0) {
339		fprintf(stderr, "bad block size %d\n", fssize);
340		exit(1);
341	}
342	if (spcl.c_volume != 1) {
343		fprintf(stderr, "Tape is not volume 1 of the dump\n");
344		exit(1);
345	}
346	if (gethead(&spcl) == FAIL) {
347		dprintf(stdout, "header read failed at %d blocks\n", blksread);
348		panic("no header after volume mark!\n");
349	}
350	findinode(&spcl);
351	if (spcl.c_type != TS_CLRI) {
352		fprintf(stderr, "Cannot find file removal list\n");
353		exit(1);
354	}
355	getbitmap(&usedinomap);
356	getbitmap(&dumpmap);
357	/*
358	 * If there may be whiteout entries on the tape, pretend that the
359	 * whiteout inode exists, so that the whiteout entries can be
360	 * extracted.
361	 */
362	if (oldinofmt == 0)
363		SETINO(WINO, dumpmap);
364}
365
366/*
367 * Prompt user to load a new dump volume.
368 * "Nextvol" is the next suggested volume to use.
369 * This suggested volume is enforced when doing full
370 * or incremental restores, but can be overrridden by
371 * the user when only extracting a subset of the files.
372 */
373void
374getvol(int nextvol)
375{
376	int newvol, savecnt, wantnext, i;
377	union u_spcl tmpspcl;
378#	define tmpbuf tmpspcl.s_spcl
379	char buf[TP_BSIZE];
380
381	newvol = savecnt = wantnext = 0;
382	if (nextvol == 1) {
383		tapesread = 0;
384		gettingfile = 0;
385	}
386	if (pipein) {
387		if (nextvol != 1)
388			panic("Changing volumes on pipe input?\n");
389		if (volno == 1)
390			return;
391		goto gethdr;
392	}
393	savecnt = blksread;
394again:
395	if (pipein)
396		exit(1); /* pipes do not get a second chance */
397	if (command == 'R' || command == 'r' || curfile.action != SKIP) {
398		newvol = nextvol;
399		wantnext = 1;
400	} else {
401		newvol = 0;
402		wantnext = 0;
403	}
404	while (newvol <= 0) {
405		if (tapesread == 0) {
406			fprintf(stderr, "%s%s%s%s%s",
407			    "You have not read any tapes yet.\n",
408			    "Unless you know which volume your",
409			    " file(s) are on you should start\n",
410			    "with the last volume and work",
411			    " towards the first.\n");
412			fprintf(stderr,
413			    "(Use 1 for the first volume/tape, etc.)\n");
414		} else {
415			fprintf(stderr, "You have read volumes");
416			strcpy(buf, ": ");
417			for (i = 1; i < 32; i++)
418				if (tapesread & (1 << i)) {
419					fprintf(stderr, "%s%d", buf, i);
420					strcpy(buf, ", ");
421				}
422			fprintf(stderr, "\n");
423		}
424		do	{
425			fprintf(stderr, "Specify next volume #: ");
426			(void) fflush(stderr);
427			(void) fgets(buf, BUFSIZ, terminal);
428		} while (!feof(terminal) && buf[0] == '\n');
429		if (feof(terminal))
430			exit(1);
431		newvol = atoi(buf);
432		if (newvol <= 0) {
433			fprintf(stderr,
434			    "Volume numbers are positive numerics\n");
435		}
436	}
437	if (newvol == volno) {
438		tapesread |= 1 << volno;
439		return;
440	}
441	closemt();
442	fprintf(stderr, "Mount tape volume %d\n", newvol);
443	fprintf(stderr, "Enter ``none'' if there are no more tapes\n");
444	fprintf(stderr, "otherwise enter tape name (default: %s) ", magtape);
445	(void) fflush(stderr);
446	(void) fgets(buf, BUFSIZ, terminal);
447	if (feof(terminal))
448		exit(1);
449	if (!strcmp(buf, "none\n")) {
450		terminateinput();
451		return;
452	}
453	if (buf[0] != '\n') {
454		(void) strcpy(magtape, buf);
455		magtape[strlen(magtape) - 1] = '\0';
456	}
457#ifdef RRESTORE
458	if (host)
459		mt = rmtopen(magtape, 0, 0);
460	else
461#endif
462		mt = open(magtape, O_RDONLY, 0);
463
464	if (mt == -1) {
465		fprintf(stderr, "Cannot open %s\n", magtape);
466		volno = -1;
467		goto again;
468	}
469gethdr:
470	volno = newvol;
471	setdumpnum();
472	FLUSHTAPEBUF();
473	if (gethead(&tmpbuf) == FAIL) {
474		dprintf(stdout, "header read failed at %d blocks\n", blksread);
475		fprintf(stderr, "tape is not dump tape\n");
476		volno = 0;
477		goto again;
478	}
479	if (tmpbuf.c_volume != volno) {
480	  	fprintf(stderr,
481		"Volume mismatch: expecting %d, tape header claims it is %d\n",
482		    volno, tmpbuf.c_volume);
483		volno = 0;
484		goto again;
485	}
486	if (tmpbuf.c_date != dumpdate || tmpbuf.c_ddate != dumptime) {
487		time_t ttime = tmpbuf.c_date;
488		fprintf(stderr, "Wrong dump date\n\tgot: %s",
489			ctime(&ttime));
490		fprintf(stderr, "\twanted: %s", ctime(&dumpdate));
491		volno = 0;
492		goto again;
493	}
494	tapesread |= 1 << volno;
495	blksread = savecnt;
496 	/*
497 	 * If continuing from the previous volume, skip over any
498 	 * blocks read already at the end of the previous volume.
499 	 *
500 	 * If coming to this volume at random, skip to the beginning
501 	 * of the next record.
502 	 */
503	dprintf(stdout, "read %ld recs, tape starts with %ld\n",
504		(long)tpblksread, (long)tmpbuf.c_firstrec);
505 	if (tmpbuf.c_type == TS_TAPE && (tmpbuf.c_flags & DR_NEWHEADER)) {
506 		if (!wantnext) {
507 			tpblksread = tmpbuf.c_firstrec;
508 			for (i = tmpbuf.c_count; i > 0; i--)
509 				readtape(buf);
510 		} else if (tmpbuf.c_firstrec > 0 &&
511			   tmpbuf.c_firstrec < tpblksread - 1) {
512			/*
513			 * -1 since we've read the volume header
514			 */
515 			i = tpblksread - tmpbuf.c_firstrec - 1;
516			dprintf(stderr, "Skipping %d duplicate record%s.\n",
517				i, i > 1 ? "s" : "");
518 			while (--i >= 0)
519 				readtape(buf);
520 		}
521 	}
522	if (curfile.action == USING) {
523		if (volno == 1)
524			panic("active file into volume 1\n");
525		return;
526	}
527	/*
528	 * Skip up to the beginning of the next record
529	 */
530	if (tmpbuf.c_type == TS_TAPE && (tmpbuf.c_flags & DR_NEWHEADER))
531		for (i = tmpbuf.c_count; i > 0; i--)
532			readtape(buf);
533	(void) gethead(&spcl);
534	findinode(&spcl);
535	if (gettingfile) {
536		gettingfile = 0;
537		longjmp(restart, 1);
538	}
539}
540
541/*
542 * Handle unexpected EOF.
543 */
544static void
545terminateinput(void)
546{
547
548	if (gettingfile && curfile.action == USING) {
549		printf("Warning: %s %s\n",
550		    "End-of-input encountered while extracting", curfile.name);
551	}
552	curfile.name = "<name unknown>";
553	curfile.action = UNKNOWN;
554	curfile.mode = 0;
555	curfile.ino = maxino;
556	if (gettingfile) {
557		gettingfile = 0;
558		longjmp(restart, 1);
559	}
560}
561
562/*
563 * handle multiple dumps per tape by skipping forward to the
564 * appropriate one.
565 */
566static void
567setdumpnum(void)
568{
569	struct mtop tcom;
570
571	if (dumpnum == 1 || volno != 1)
572		return;
573	if (pipein) {
574		fprintf(stderr, "Cannot have multiple dumps on pipe input\n");
575		exit(1);
576	}
577	tcom.mt_op = MTFSF;
578	tcom.mt_count = dumpnum - 1;
579#ifdef RRESTORE
580	if (host)
581		rmtioctl(MTFSF, dumpnum - 1);
582	else
583#endif
584		if (ioctl(mt, (int)MTIOCTOP, (char *)&tcom) < 0)
585			fprintf(stderr, "ioctl MTFSF: %s\n", strerror(errno));
586}
587
588void
589printdumpinfo(void)
590{
591	time_t ttime;
592
593	ttime = spcl.c_date;
594	fprintf(stdout, "Dump   date: %s", ctime(&ttime));
595	ttime = spcl.c_ddate;
596	fprintf(stdout, "Dumped from: %s",
597	    (spcl.c_ddate == 0) ? "the epoch\n" : ctime(&ttime));
598	fprintf(stderr, "Level %d dump of %s on %s:%s\n",
599		spcl.c_level, spcl.c_filesys,
600		*spcl.c_host? spcl.c_host: "[unknown]", spcl.c_dev);
601	fprintf(stderr, "Label: %s\n", spcl.c_label);
602
603	if (Mtreefile) {
604		ttime = spcl.c_date;
605		fprintf(Mtreefile, "#Dump   date: %s", ctime(&ttime));
606		ttime = spcl.c_ddate;
607		fprintf(Mtreefile, "#Dumped from: %s",
608		    (spcl.c_ddate == 0) ? "the epoch\n" : ctime(&ttime));
609		fprintf(Mtreefile, "#Level %d dump of %s on %s:%s\n",
610			spcl.c_level, spcl.c_filesys,
611			*spcl.c_host? spcl.c_host: "[unknown]", spcl.c_dev);
612		fprintf(Mtreefile, "#Label: %s\n", spcl.c_label);
613		fprintf(Mtreefile, "/set uname=root gname=wheel\n");
614		if (ferror(Mtreefile))
615			err(1, "error writing to mtree file");
616	}
617}
618
619int
620extractfile(char *name)
621{
622	char dbuffer[DIGEST_BUFFER_SIZE];
623	int flags;
624	uid_t uid;
625	gid_t gid;
626	mode_t mode;
627	struct timeval mtimep[2], ctimep[2];
628	struct entry *ep;
629	int setbirth;
630
631	curfile.name = name;
632	curfile.action = USING;
633	mtimep[0].tv_sec = curfile.atime_sec;
634	mtimep[0].tv_usec = curfile.atime_nsec / 1000;
635	mtimep[1].tv_sec = curfile.mtime_sec;
636	mtimep[1].tv_usec = curfile.mtime_nsec / 1000;
637
638	setbirth = curfile.birthtime_sec != 0;
639
640	if (setbirth) {
641		ctimep[0].tv_sec = curfile.atime_sec;
642		ctimep[0].tv_usec = curfile.atime_nsec / 1000;
643		ctimep[1].tv_sec = curfile.birthtime_sec;
644		ctimep[1].tv_usec = curfile.birthtime_nsec / 1000;
645	}
646	uid = curfile.uid;
647	gid = curfile.gid;
648	mode = curfile.mode;
649	flags = curfile.file_flags;
650	switch (mode & IFMT) {
651
652	default:
653		fprintf(stderr, "%s: unknown file mode 0%o\n", name, mode);
654		skipfile();
655		return (FAIL);
656
657	case IFSOCK:
658		vprintf(stdout, "skipped socket %s\n", name);
659		skipfile();
660		return (GOOD);
661
662	case IFDIR:
663		if (mflag) {
664			ep = lookupname(name);
665			if (ep == NULL || ep->e_flags & EXTRACT)
666				panic("unextracted directory %s\n", name);
667			skipfile();
668			return (GOOD);
669		}
670		vprintf(stdout, "extract file %s\n", name);
671		return (genliteraldir(name, curfile.ino));
672
673	case IFLNK:
674		lnkbuf[0] = '\0';
675		pathlen = 0;
676		getfile(xtrlnkfile, xtrlnkskip);
677		if (pathlen == 0) {
678			vprintf(stdout,
679			    "%s: zero length symbolic link (ignored)\n", name);
680			return (GOOD);
681		}
682		if (uflag)
683			(void) unlink(name);
684		if (linkit(lnkbuf, name, SYMLINK) == GOOD) {
685			if (setbirth)
686				(void) lutimes(name, ctimep);
687			(void) lutimes(name, mtimep);
688			(void) lchown(name, uid, gid);
689			(void) lchmod(name, mode);
690			if (Mtreefile) {
691				writemtree(name, "link",
692				    uid, gid, mode, flags);
693			} else
694				(void) lchflags(name, flags);
695			return (GOOD);
696		}
697		return (FAIL);
698
699	case IFCHR:
700	case IFBLK:
701		vprintf(stdout, "extract special file %s\n", name);
702		if (Nflag) {
703			skipfile();
704			return (GOOD);
705		}
706		if (uflag)
707			(void) unlink(name);
708		if (mknod(name, (mode & (IFCHR | IFBLK)) | 0600,
709		    (int)curfile.rdev) < 0) {
710			fprintf(stderr, "%s: cannot create special file: %s\n",
711			    name, strerror(errno));
712			skipfile();
713			return (FAIL);
714		}
715		skipfile();
716		if (setbirth)
717			(void) utimes(name, ctimep);
718		(void) utimes(name, mtimep);
719		(void) chown(name, uid, gid);
720		(void) chmod(name, mode);
721		if (Mtreefile) {
722			writemtree(name,
723			    ((mode & (S_IFBLK | IFCHR)) == IFBLK) ?
724			    "block" : "char",
725			    uid, gid, mode, flags);
726		} else
727			(void) chflags(name, flags);
728		return (GOOD);
729
730	case IFIFO:
731		vprintf(stdout, "extract fifo %s\n", name);
732		if (Nflag) {
733			skipfile();
734			return (GOOD);
735		}
736		if (uflag)
737			(void) unlink(name);
738		if (mkfifo(name, 0600) < 0) {
739			fprintf(stderr, "%s: cannot create fifo: %s\n",
740			    name, strerror(errno));
741			skipfile();
742			return (FAIL);
743		}
744		skipfile();
745		if (setbirth)
746			(void) utimes(name, ctimep);
747		(void) utimes(name, mtimep);
748		(void) chown(name, uid, gid);
749		(void) chmod(name, mode);
750		if (Mtreefile) {
751			writemtree(name, "fifo",
752			    uid, gid, mode, flags);
753		} else
754			(void) chflags(name, flags);
755		return (GOOD);
756
757	case IFREG:
758		vprintf(stdout, "extract file %s\n", name);
759		if (uflag)
760			(void) unlink(name);
761		if (!Nflag && (ofile = open(name, O_WRONLY | O_CREAT | O_TRUNC,
762		    0600)) < 0) {
763			fprintf(stderr, "%s: cannot create file: %s\n",
764			    name, strerror(errno));
765			skipfile();
766			return (FAIL);
767		}
768		if (Dflag)
769			(*ddesc->dd_init)(&dcontext);
770		getfile(xtrfile, xtrskip);
771		if (Dflag) {
772			(*ddesc->dd_end)(&dcontext, dbuffer);
773			for (ep = lookupname(name); ep != NULL;
774			    ep = ep->e_links)
775				fprintf(stdout, "%s (%s) = %s\n",
776				    ddesc->dd_name, myname(ep),
777				    dbuffer);
778		}
779		if (Nflag)
780			return (GOOD);
781		if (setbirth)
782			(void) futimes(ofile, ctimep);
783		(void) futimes(ofile, mtimep);
784		(void) fchown(ofile, uid, gid);
785		(void) fchmod(ofile, mode);
786		if (Mtreefile) {
787			writemtree(name, "file",
788			    uid, gid, mode, flags);
789		} else
790			(void) fchflags(ofile, flags);
791		(void) close(ofile);
792		return (GOOD);
793	}
794	/* NOTREACHED */
795}
796
797/*
798 * skip over bit maps on the tape
799 */
800void
801skipmaps(void)
802{
803
804	while (spcl.c_type == TS_BITS || spcl.c_type == TS_CLRI)
805		skipfile();
806}
807
808/*
809 * skip over a file on the tape
810 */
811void
812skipfile(void)
813{
814
815	curfile.action = SKIP;
816	getfile(xtrnull, xtrnull);
817}
818
819/*
820 * Extract a bitmap from the tape.
821 * The first bitmap sets maxino;
822 * other bitmaps must be of same size.
823 */
824void
825getbitmap(char **map)
826{
827	int i;
828	size_t volatile size = spcl.c_size;
829	size_t volatile mapsize = size;
830	char *mapptr;
831
832	curfile.action = USING;
833	if (spcl.c_type == TS_END)
834		panic("ran off end of tape\n");
835	if (spcl.c_magic != FS_UFS2_MAGIC)
836		panic("not at beginning of a file\n");
837	if (!gettingfile && setjmp(restart) != 0)
838		return;
839	gettingfile++;
840	mapptr = *map = malloc(size);
841loop:
842	if (*map == NULL)
843		panic("no memory for %s\n", curfile.name);
844	for (i = 0; i < spcl.c_count && size >= TP_BSIZE; i++) {
845		readtape(mapptr);
846		mapptr += TP_BSIZE;
847		size -= TP_BSIZE;
848	}
849	if (size != 0 || i != spcl.c_count)
850		panic("%s: inconsistent map size\n", curfile.name);
851	if (gethead(&spcl) == GOOD && spcl.c_type == TS_ADDR) {
852		size = spcl.c_count * TP_BSIZE;
853		*map = realloc(*map, mapsize + size);
854		mapptr = *map + mapsize;
855		mapsize += size;
856		goto loop;
857	}
858	if (maxino == 0)
859		maxino = mapsize * NBBY + 1;
860	else if (maxino != mapsize * NBBY + 1)
861		panic("%s: map size changed\n", curfile.name);
862	findinode(&spcl);
863	gettingfile = 0;
864}
865
866/*
867 * Extract a file from the tape.
868 * When an allocated block is found it is passed to the fill function;
869 * when an unallocated block (hole) is found, a zeroed buffer is passed
870 * to the skip function.
871 */
872void
873getfile(void (*fill)(char *buf, long size),
874	void (*skip)(char *buf, long size))
875{
876	int i;
877	int volatile curblk;
878	quad_t volatile size;
879	static char clearedbuf[MAXBSIZE];
880	char buf[MAXBSIZE / TP_BSIZE][TP_BSIZE];
881	char junk[TP_BSIZE];
882
883	curblk = 0;
884	size = spcl.c_size;
885
886	if (spcl.c_type == TS_END)
887		panic("ran off end of tape\n");
888	if (spcl.c_magic != FS_UFS2_MAGIC)
889		panic("not at beginning of a file\n");
890	if (!gettingfile && setjmp(restart) != 0)
891		return;
892	gettingfile++;
893loop:
894	for (i = 0; i < spcl.c_count; i++) {
895		if (spcl.c_addr[i]) {
896			readtape(&buf[curblk++][0]);
897			if ((uint32_t)curblk == fssize / TP_BSIZE) {
898				(*fill)((char *)buf, (long)(size > TP_BSIZE ?
899				     fssize : (curblk - 1) * TP_BSIZE + size));
900				curblk = 0;
901			}
902		} else {
903			if (curblk > 0) {
904				(*fill)((char *)buf, (long)(size > TP_BSIZE ?
905				     curblk * TP_BSIZE :
906				     (curblk - 1) * TP_BSIZE + size));
907				curblk = 0;
908			}
909			(*skip)(clearedbuf, (long)(size > TP_BSIZE ?
910				TP_BSIZE : size));
911		}
912		if ((size -= TP_BSIZE) <= 0) {
913			for (i++; i < spcl.c_count; i++)
914				if (spcl.c_addr[i])
915					readtape(junk);
916			break;
917		}
918	}
919	if (gethead(&spcl) == GOOD && size > 0) {
920		if (spcl.c_type == TS_ADDR)
921			goto loop;
922		dprintf(stdout,
923			"Missing address (header) block for %s at %d blocks\n",
924			curfile.name, blksread);
925	}
926	if (curblk > 0)
927		(*fill)((char *)buf, (long)((curblk * TP_BSIZE) + size));
928	/* Skip over Linux extended attributes. */
929	if (spcl.c_type == TS_INODE && (spcl.c_flags & DR_EXTATTRIBUTES)) {
930		for (i = 0; i < spcl.c_count; i++)
931			readtape(junk);
932		(void)gethead(&spcl);
933	}
934	findinode(&spcl);
935	gettingfile = 0;
936}
937
938/*
939 * Write out the next block of a file.
940 */
941static void
942xtrfile(char *buf, long size)
943{
944
945	if (Dflag)
946		(*ddesc->dd_update)(&dcontext, buf, size);
947	if (Nflag)
948		return;
949	if (write(ofile, buf, (int) size) == -1) {
950		fprintf(stderr,
951		    "write error extracting inode %llu, name %s\nwrite: %s\n",
952			(unsigned long long)curfile.ino, curfile.name,
953			strerror(errno));
954		exit(1);
955	}
956}
957
958/*
959 * Skip over a hole in a file.
960 */
961/* ARGSUSED */
962static void
963xtrskip(char *buf, long size)
964{
965
966	if (Dflag)
967		(*ddesc->dd_update)(&dcontext, buf, size);
968	if (Nflag)
969		return;
970	if (lseek(ofile, size, SEEK_CUR) == -1) {
971		fprintf(stderr,
972		    "seek error extracting inode %llu, name %s\nlseek: %s\n",
973			(unsigned long long)curfile.ino, curfile.name,
974			strerror(errno));
975		exit(1);
976	}
977}
978
979/*
980 * Collect the next block of a symbolic link.
981 */
982static void
983xtrlnkfile(char *buf, long size)
984{
985
986	pathlen += size;
987	if (pathlen > MAXPATHLEN) {
988		fprintf(stderr, "symbolic link name: %s->%s%s; too long %d\n",
989		    curfile.name, lnkbuf, buf, pathlen);
990		exit(1);
991	}
992	(void) strcat(lnkbuf, buf);
993}
994
995/*
996 * Skip over a hole in a symbolic link (should never happen).
997 */
998/* ARGSUSED */
999static void
1000xtrlnkskip(char *buf __unused, long size __unused)
1001{
1002
1003	fprintf(stderr, "unallocated block in symbolic link %s\n",
1004		curfile.name);
1005	exit(1);
1006}
1007
1008/*
1009 * Noop, when an extraction function is not needed.
1010 */
1011/* ARGSUSED */
1012void
1013xtrnull(char *buf __unused, long size __unused)
1014{
1015
1016	return;
1017}
1018
1019/*
1020 * Read TP_BSIZE blocks from the input.
1021 * Handle read errors, and end of media.
1022 */
1023static void
1024readtape(char *buf)
1025{
1026	int rd, newvol, i;
1027	int cnt, seek_failed;
1028
1029	if (blkcnt < numtrec) {
1030		memmove(buf, &tapebuf[(blkcnt++ * TP_BSIZE)], (long)TP_BSIZE);
1031		blksread++;
1032		tpblksread++;
1033		return;
1034	}
1035	for (i = 0; i < ntrec; i++)
1036		((struct s_spcl *)&tapebuf[i * TP_BSIZE])->c_magic = 0;
1037	if (numtrec == 0)
1038		numtrec = ntrec;
1039	cnt = ntrec * TP_BSIZE;
1040	rd = 0;
1041getmore:
1042#ifdef RRESTORE
1043	if (host)
1044		i = rmtread(&tapebuf[rd], cnt);
1045	else
1046#endif
1047		i = read(mt, &tapebuf[rd], cnt);
1048	/*
1049	 * Check for mid-tape short read error.
1050	 * If found, skip rest of buffer and start with the next.
1051	 */
1052	if (!pipein && numtrec < ntrec && i > 0) {
1053		dprintf(stdout, "mid-media short read error.\n");
1054		numtrec = ntrec;
1055	}
1056	/*
1057	 * Handle partial block read.
1058	 */
1059	if (pipein && i == 0 && rd > 0)
1060		i = rd;
1061	else if (i > 0 && i != ntrec * TP_BSIZE) {
1062		if (pipein) {
1063			rd += i;
1064			cnt -= i;
1065			if (cnt > 0)
1066				goto getmore;
1067			i = rd;
1068		} else {
1069			/*
1070			 * Short read. Process the blocks read.
1071			 */
1072			if (i % TP_BSIZE != 0)
1073				vprintf(stdout,
1074				    "partial block read: %d should be %d\n",
1075				    i, ntrec * TP_BSIZE);
1076			numtrec = i / TP_BSIZE;
1077		}
1078	}
1079	/*
1080	 * Handle read error.
1081	 */
1082	if (i < 0) {
1083		fprintf(stderr, "Tape read error while ");
1084		switch (curfile.action) {
1085		default:
1086			fprintf(stderr, "trying to set up tape\n");
1087			break;
1088		case UNKNOWN:
1089			fprintf(stderr, "trying to resynchronize\n");
1090			break;
1091		case USING:
1092			fprintf(stderr, "restoring %s\n", curfile.name);
1093			break;
1094		case SKIP:
1095			fprintf(stderr, "skipping over inode %llu\n",
1096			    (unsigned long long)curfile.ino);
1097			break;
1098		}
1099		if (!yflag && !reply("continue"))
1100			exit(1);
1101		i = ntrec * TP_BSIZE;
1102		memset(tapebuf, 0, i);
1103#ifdef RRESTORE
1104		if (host)
1105			seek_failed = (rmtseek(i, 1) < 0);
1106		else
1107#endif
1108			seek_failed = (lseek(mt, i, SEEK_CUR) == (off_t)-1);
1109
1110		if (seek_failed) {
1111			fprintf(stderr,
1112			    "continuation failed: %s\n", strerror(errno));
1113			exit(1);
1114		}
1115	}
1116	/*
1117	 * Handle end of tape.
1118	 */
1119	if (i == 0) {
1120		vprintf(stdout, "End-of-tape encountered\n");
1121		if (!pipein) {
1122			newvol = volno + 1;
1123			volno = 0;
1124			numtrec = 0;
1125			getvol(newvol);
1126			readtape(buf);
1127			return;
1128		}
1129		if (rd % TP_BSIZE != 0)
1130			panic("partial block read: %d should be %d\n",
1131				rd, ntrec * TP_BSIZE);
1132		terminateinput();
1133		memmove(&tapebuf[rd], &endoftapemark, (long)TP_BSIZE);
1134	}
1135	blkcnt = 0;
1136	memmove(buf, &tapebuf[(blkcnt++ * TP_BSIZE)], (long)TP_BSIZE);
1137	blksread++;
1138	tpblksread++;
1139}
1140
1141static void
1142findtapeblksize(void)
1143{
1144	long i;
1145
1146	for (i = 0; i < ntrec; i++)
1147		((struct s_spcl *)&tapebuf[i * TP_BSIZE])->c_magic = 0;
1148	blkcnt = 0;
1149#ifdef RRESTORE
1150	if (host)
1151		i = rmtread(tapebuf, ntrec * TP_BSIZE);
1152	else
1153#endif
1154		i = read(mt, tapebuf, ntrec * TP_BSIZE);
1155
1156	if (i <= 0) {
1157		fprintf(stderr, "tape read error: %s\n", strerror(errno));
1158		exit(1);
1159	}
1160	if (i % TP_BSIZE != 0) {
1161		fprintf(stderr, "Tape block size (%ld) %s (%ld)\n",
1162			(long)i, "is not a multiple of dump block size",
1163			(long)TP_BSIZE);
1164		exit(1);
1165	}
1166	ntrec = i / TP_BSIZE;
1167	numtrec = ntrec;
1168	vprintf(stdout, "Tape block size is %d\n", ntrec);
1169}
1170
1171void
1172closemt(void)
1173{
1174
1175	if (mt < 0)
1176		return;
1177#ifdef RRESTORE
1178	if (host)
1179		rmtclose();
1180	else
1181#endif
1182		(void) close(mt);
1183}
1184
1185/*
1186 * Read the next block from the tape.
1187 * Check to see if it is one of several vintage headers.
1188 * If it is an old style header, convert it to a new style header.
1189 * If it is not any valid header, return an error.
1190 */
1191static int
1192gethead(struct s_spcl *buf)
1193{
1194	union u_ospcl u_ospcl;
1195
1196	if (!cvtflag) {
1197		readtape((char *)buf);
1198		if (buf->c_magic != NFS_MAGIC &&
1199		    buf->c_magic != FS_UFS2_MAGIC) {
1200			if (bswap32(buf->c_magic) != NFS_MAGIC &&
1201			    bswap32(buf->c_magic) != FS_UFS2_MAGIC)
1202				return (FAIL);
1203			if (!Bcvt) {
1204				vprintf(stdout, "Note: Doing Byte swapping\n");
1205				Bcvt = 1;
1206			}
1207		}
1208		if (checksum((int *)buf) == FAIL)
1209			return (FAIL);
1210		if (Bcvt)
1211			swap_header(buf);
1212		goto good;
1213	}
1214
1215	readtape((char *)(&u_ospcl.s_ospcl));
1216	if (checksum((int *)(&u_ospcl.s_ospcl)) == FAIL)
1217		return (FAIL);
1218	if (u_ospcl.s_ospcl.c_magic != OFS_MAGIC) {
1219		if (bswap32(u_ospcl.s_ospcl.c_magic) != OFS_MAGIC)
1220			return (FAIL);
1221		if (!Bcvt) {
1222			vprintf(stdout, "Note: Doing Byte swapping\n");
1223			Bcvt = 1;
1224		}
1225		swap_old_header(&u_ospcl.s_ospcl);
1226	}
1227
1228	memset(buf, 0, TP_BSIZE);
1229	buf->c_type = u_ospcl.s_ospcl.c_type;
1230	buf->c_date = u_ospcl.s_ospcl.c_date;
1231	buf->c_ddate = u_ospcl.s_ospcl.c_ddate;
1232	buf->c_volume = u_ospcl.s_ospcl.c_volume;
1233	buf->c_tapea = u_ospcl.s_ospcl.c_tapea;
1234	buf->c_inumber = u_ospcl.s_ospcl.c_inumber;
1235	buf->c_checksum = u_ospcl.s_ospcl.c_checksum;
1236	buf->c_mode = u_ospcl.s_ospcl.c_odinode.odi_mode;
1237	buf->c_uid = u_ospcl.s_ospcl.c_odinode.odi_uid;
1238	buf->c_gid = u_ospcl.s_ospcl.c_odinode.odi_gid;
1239	buf->c_size = u_ospcl.s_ospcl.c_odinode.odi_size;
1240	buf->c_rdev = u_ospcl.s_ospcl.c_odinode.odi_rdev;
1241	buf->c_atime = u_ospcl.s_ospcl.c_odinode.odi_atime;
1242	buf->c_mtime = u_ospcl.s_ospcl.c_odinode.odi_mtime;
1243	buf->c_count = u_ospcl.s_ospcl.c_count;
1244	memmove(buf->c_addr, u_ospcl.s_ospcl.c_addr, (long)256);
1245	buf->c_magic = FS_UFS2_MAGIC;
1246good:
1247	switch (buf->c_type) {
1248
1249	case TS_CLRI:
1250	case TS_BITS:
1251		/*
1252		 * Have to patch up missing information in bit map headers
1253		 */
1254		buf->c_inumber = 0;
1255		buf->c_size = buf->c_count * TP_BSIZE;
1256		break;
1257
1258	case TS_TAPE:
1259		if ((buf->c_flags & DR_NEWINODEFMT) == 0)
1260			oldinofmt = 1;
1261		/* fall through */
1262	case TS_END:
1263		buf->c_inumber = 0;
1264		break;
1265
1266	case TS_INODE:
1267		if (buf->c_magic == NFS_MAGIC) {
1268			buf->c_tapea = buf->c_old_tapea;
1269			buf->c_firstrec = buf->c_old_firstrec;
1270			buf->c_date = buf->c_old_date;
1271			buf->c_ddate = buf->c_old_ddate;
1272			buf->c_atime = buf->c_old_atime;
1273			buf->c_mtime = buf->c_old_mtime;
1274			buf->c_birthtime = 0;
1275			buf->c_birthtimensec = 0;
1276			buf->c_atimensec = buf->c_mtimensec = 0;
1277		}
1278
1279	case TS_ADDR:
1280		break;
1281
1282	default:
1283		panic("gethead: unknown inode type %d\n", buf->c_type);
1284		break;
1285	}
1286
1287	buf->c_magic = FS_UFS2_MAGIC;
1288
1289	/*
1290	 * If we are restoring a filesystem with old format inodes,
1291	 * copy the uid/gid to the new location.
1292	 */
1293	if (oldinofmt) {
1294		buf->c_uid = buf->c_spare1[1];
1295		buf->c_gid = buf->c_spare1[2];
1296	}
1297	if (dflag)
1298		accthdr(buf);
1299	return(GOOD);
1300}
1301
1302/*
1303 * Check that a header is where it belongs and predict the next header
1304 */
1305static void
1306accthdr(struct s_spcl *header)
1307{
1308	static ino_t previno = 0x7fffffff;
1309	static int prevtype;
1310	static long predict;
1311	long blks, i;
1312
1313	if (header->c_type == TS_TAPE) {
1314		fprintf(stderr, "Volume header (%s inode format) ",
1315		    oldinofmt ? "old" : "new");
1316 		if (header->c_firstrec)
1317 			fprintf(stderr, "begins with record %lld",
1318 				(long long)header->c_firstrec);
1319 		fprintf(stderr, "\n");
1320		previno = 0x7fffffff;
1321		return;
1322	}
1323	if (previno == 0x7fffffff)
1324		goto newcalc;
1325	switch (prevtype) {
1326	case TS_BITS:
1327		fprintf(stderr, "Dumped inodes map header");
1328		break;
1329	case TS_CLRI:
1330		fprintf(stderr, "Used inodes map header");
1331		break;
1332	case TS_INODE:
1333		fprintf(stderr, "File header, ino %llu",
1334		    (unsigned long long)previno);
1335		break;
1336	case TS_ADDR:
1337		fprintf(stderr, "File continuation header, ino %llu",
1338		    (unsigned long long)previno);
1339		break;
1340	case TS_END:
1341		fprintf(stderr, "End of tape header");
1342		break;
1343	}
1344	if (predict != blksread - 1)
1345		fprintf(stderr, "; predicted %ld blocks, got %ld blocks",
1346			(long)predict, (long)(blksread - 1));
1347	fprintf(stderr, "\n");
1348newcalc:
1349	blks = 0;
1350	switch (header->c_type) {
1351	case TS_END:
1352		break;
1353	case TS_CLRI:
1354	case TS_BITS:
1355		blks = header->c_count;
1356		break;
1357	default:
1358		for (i = 0; i < header->c_count; i++)
1359			if (header->c_addr[i] != 0)
1360				blks++;
1361		break;
1362	}
1363	predict = blks;
1364	blksread = 0;
1365	prevtype = header->c_type;
1366	previno = header->c_inumber;
1367}
1368
1369/*
1370 * Find an inode header.
1371 * Complain if had to skip, and complain is set.
1372 */
1373static void
1374findinode(struct s_spcl *header)
1375{
1376	static long skipcnt = 0;
1377	long i;
1378	char buf[TP_BSIZE];
1379
1380	curfile.name = "<name unknown>";
1381	curfile.action = UNKNOWN;
1382	curfile.mode = 0;
1383	curfile.ino = 0;
1384    top:
1385	do {
1386		if (header->c_magic != FS_UFS2_MAGIC) {
1387			skipcnt++;
1388			while (gethead(header) == FAIL ||
1389			    header->c_date != dumpdate)
1390				skipcnt++;
1391		}
1392		switch (header->c_type) {
1393
1394		case TS_ADDR:
1395			/*
1396			 * Skip up to the beginning of the next record
1397			 */
1398			for (i = 0; i < header->c_count; i++)
1399				if (header->c_addr[i])
1400					readtape(buf);
1401			while (gethead(header) == FAIL ||
1402			    header->c_date != dumpdate)
1403				skipcnt++;
1404			/* We've read a header; don't drop it. */
1405			goto top;
1406
1407		case TS_INODE:
1408			curfile.mode = header->c_mode;
1409			curfile.uid = header->c_uid;
1410			curfile.gid = header->c_gid;
1411			curfile.file_flags = header->c_file_flags;
1412			curfile.rdev = header->c_rdev;
1413			curfile.atime_sec = header->c_atime;
1414			curfile.atime_nsec = header->c_atimensec;
1415			curfile.mtime_sec = header->c_mtime;
1416			curfile.mtime_nsec = header->c_mtimensec;
1417			curfile.birthtime_sec = header->c_birthtime;
1418			curfile.birthtime_nsec = header->c_birthtimensec;
1419			curfile.size = header->c_size;
1420			curfile.ino = header->c_inumber;
1421			break;
1422
1423		case TS_END:
1424			curfile.ino = maxino;
1425			break;
1426
1427		case TS_CLRI:
1428			curfile.name = "<file removal list>";
1429			break;
1430
1431		case TS_BITS:
1432			curfile.name = "<file dump list>";
1433			break;
1434
1435		case TS_TAPE:
1436			panic("unexpected tape header\n");
1437			break;
1438
1439		default:
1440			panic("unknown tape header type %d\n", spcl.c_type);
1441			break;
1442
1443		}
1444	} while (header->c_type == TS_ADDR);
1445	if (skipcnt > 0)
1446		fprintf(stderr, "resync restore, skipped %ld blocks\n",
1447		    (long)skipcnt);
1448	skipcnt = 0;
1449}
1450
1451static int
1452checksum(int *buf)
1453{
1454	int i, j;
1455
1456	j = sizeof(union u_spcl) / sizeof(int);
1457	i = 0;
1458	if(!Bcvt) {
1459		do
1460			i += *buf++;
1461		while (--j);
1462	} else {
1463		do
1464			i += bswap32(*buf++);
1465		while (--j);
1466	}
1467
1468	if (i != CHECKSUM) {
1469		fprintf(stderr, "Checksum error %o, inode %llu file %s\n", i,
1470		    (unsigned long long)curfile.ino, curfile.name);
1471		return(FAIL);
1472	}
1473	return(GOOD);
1474}
1475
1476#ifdef RRESTORE
1477#include <stdarg.h>
1478
1479void
1480msg(const char *fmt, ...)
1481{
1482	va_list ap;
1483
1484	va_start(ap, fmt);
1485	(void)vfprintf(stderr, fmt, ap);
1486	va_end(ap);
1487}
1488#endif /* RRESTORE */
1489
1490static void
1491swap_header(struct s_spcl *s)
1492{
1493	s->c_type = bswap32(s->c_type);
1494	s->c_old_date = bswap32(s->c_old_date);
1495	s->c_old_ddate = bswap32(s->c_old_ddate);
1496	s->c_volume = bswap32(s->c_volume);
1497	s->c_old_tapea = bswap32(s->c_old_tapea);
1498	s->c_inumber = bswap32(s->c_inumber);
1499	s->c_magic = bswap32(s->c_magic);
1500	s->c_checksum = bswap32(s->c_checksum);
1501
1502	s->c_mode = bswap16(s->c_mode);
1503	s->c_size = bswap64(s->c_size);
1504	s->c_old_atime = bswap32(s->c_old_atime);
1505	s->c_atimensec = bswap32(s->c_atimensec);
1506	s->c_old_mtime = bswap32(s->c_old_mtime);
1507	s->c_mtimensec = bswap32(s->c_mtimensec);
1508	s->c_rdev = bswap32(s->c_rdev);
1509	s->c_birthtimensec = bswap32(s->c_birthtimensec);
1510	s->c_birthtime = bswap64(s->c_birthtime);
1511	s->c_atime = bswap64(s->c_atime);
1512	s->c_mtime = bswap64(s->c_mtime);
1513	s->c_file_flags = bswap32(s->c_file_flags);
1514	s->c_uid = bswap32(s->c_uid);
1515	s->c_gid = bswap32(s->c_gid);
1516
1517	s->c_count = bswap32(s->c_count);
1518	s->c_level = bswap32(s->c_level);
1519	s->c_flags = bswap32(s->c_flags);
1520	s->c_old_firstrec = bswap32(s->c_old_firstrec);
1521
1522	s->c_date = bswap64(s->c_date);
1523	s->c_ddate = bswap64(s->c_ddate);
1524	s->c_tapea = bswap64(s->c_tapea);
1525	s->c_firstrec = bswap64(s->c_firstrec);
1526
1527	/*
1528	 * These are ouid and ogid.
1529	 */
1530	s->c_spare1[1] = bswap16(s->c_spare1[1]);
1531	s->c_spare1[2] = bswap16(s->c_spare1[2]);
1532}
1533
1534static void
1535swap_old_header(struct s_ospcl *os)
1536{
1537	os->c_type = bswap32(os->c_type);
1538	os->c_date = bswap32(os->c_date);
1539	os->c_ddate = bswap32(os->c_ddate);
1540	os->c_volume = bswap32(os->c_volume);
1541	os->c_tapea = bswap32(os->c_tapea);
1542	os->c_inumber = bswap16(os->c_inumber);
1543	os->c_magic = bswap32(os->c_magic);
1544	os->c_checksum = bswap32(os->c_checksum);
1545
1546	os->c_odinode.odi_mode = bswap16(os->c_odinode.odi_mode);
1547	os->c_odinode.odi_nlink = bswap16(os->c_odinode.odi_nlink);
1548	os->c_odinode.odi_uid = bswap16(os->c_odinode.odi_uid);
1549	os->c_odinode.odi_gid = bswap16(os->c_odinode.odi_gid);
1550
1551	os->c_odinode.odi_size = bswap32(os->c_odinode.odi_size);
1552	os->c_odinode.odi_rdev = bswap32(os->c_odinode.odi_rdev);
1553	os->c_odinode.odi_atime = bswap32(os->c_odinode.odi_atime);
1554	os->c_odinode.odi_mtime = bswap32(os->c_odinode.odi_mtime);
1555	os->c_odinode.odi_ctime = bswap32(os->c_odinode.odi_ctime);
1556
1557	os->c_count = bswap32(os->c_count);
1558}
1559