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
37static 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
71static long	fssize = MAXBSIZE;
72static int	mt = -1;
73static int	pipein = 0;
74static int	pipecmdin = 0;
75static FILE	*popenfp = NULL;
76static char	*magtape;
77static int	blkcnt;
78static int	numtrec;
79static char	*tapebuf;
80static union	u_spcl endoftapemark;
81static long	byteslide = 0;
82static long	blksread;		/* blocks read since last header */
83static int64_t	tapeaddr = 0;		/* current TP_BSIZE tape record */
84static long	tapesread;
85static jmp_buf	restart;
86static int	gettingfile = 0;	/* restart has a valid frame */
87static char	*host = NULL;
88static int	readmapflag;
89
90static int	ofile;
91static char	*map;
92static char	lnkbuf[MAXPATHLEN + 1];
93static int	pathlen;
94
95int		Bcvt;		/* Swap Bytes */
96int		oldinofmt;	/* FreeBSD 1 inode format needs cvt */
97
98#define	FLUSHTAPEBUF()	blkcnt = ntrec + 1
99
100char *namespace_names[] = EXTATTR_NAMESPACE_NAMES;
101
102static void	 accthdr(struct s_spcl *);
103static int	 checksum(int *);
104static void	 findinode(struct s_spcl *);
105static void	 findtapeblksize(void);
106static char	*setupextattr(int);
107static void	 xtrattr(char *, long);
108static void	 set_extattr_link(char *, void *, int);
109static void	 set_extattr_fd(int, char *, void *, int);
110static int	 gethead(struct s_spcl *);
111static void	 readtape(char *);
112static void	 setdumpnum(void);
113static u_long	 swabl(u_long);
114static u_char	*swablong(u_char *, int);
115static u_char	*swabshort(u_char *, int);
116static void	 terminateinput(void);
117static void	 xtrfile(char *, long);
118static void	 xtrlnkfile(char *, long);
119static void	 xtrlnkskip(char *, long);
120static void	 xtrmap(char *, long);
121static void	 xtrmapskip(char *, long);
122static void	 xtrskip(char *, long);
123
124/*
125 * Set up an input source
126 */
127void
128setinput(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	/* no longer need or want root privileges */
168	if (setuid(getuid()) != 0) {
169		fprintf(stderr, "setuid failed\n");
170		done(1);
171	}
172	magtape = strdup(source);
173	if (magtape == NULL) {
174		fprintf(stderr, "Cannot allocate space for magtape buffer\n");
175		done(1);
176	}
177}
178
179void
180newtapebuf(long size)
181{
182	static int tapebufsize = -1;
183
184	ntrec = size;
185	if (size <= tapebufsize)
186		return;
187	if (tapebuf != NULL)
188		free(tapebuf - TP_BSIZE);
189	tapebuf = malloc((size+1) * TP_BSIZE);
190	if (tapebuf == NULL) {
191		fprintf(stderr, "Cannot allocate space for tape buffer\n");
192		done(1);
193	}
194	tapebuf += TP_BSIZE;
195	tapebufsize = size;
196}
197
198/*
199 * Verify that the tape drive can be accessed and
200 * that it actually is a dump tape.
201 */
202void
203setup(void)
204{
205	int i, j, *ip;
206	struct stat stbuf;
207
208	vprintf(stdout, "Verify tape and initialize maps\n");
209	if (pipecmdin) {
210		if (setenv("RESTORE_VOLUME", "1", 1) == -1) {
211			fprintf(stderr, "Cannot set $RESTORE_VOLUME: %s\n",
212			    strerror(errno));
213			done(1);
214		}
215		popenfp = popen(magtape, "r");
216		mt = popenfp ? fileno(popenfp) : -1;
217	} else
218#ifdef RRESTORE
219	if (host)
220		mt = rmtopen(magtape, 0);
221	else
222#endif
223	if (pipein)
224		mt = 0;
225	else
226		mt = open(magtape, O_RDONLY, 0);
227	if (mt < 0) {
228		fprintf(stderr, "%s: %s\n", magtape, strerror(errno));
229		done(1);
230	}
231	volno = 1;
232	setdumpnum();
233	FLUSHTAPEBUF();
234	if (!pipein && !pipecmdin && !bflag)
235		findtapeblksize();
236	if (gethead(&spcl) == FAIL) {
237		fprintf(stderr, "Tape is not a dump tape\n");
238		done(1);
239	}
240	if (pipein) {
241		endoftapemark.s_spcl.c_magic = FS_UFS2_MAGIC;
242		endoftapemark.s_spcl.c_type = TS_END;
243		ip = (int *)&endoftapemark;
244		j = sizeof(union u_spcl) / sizeof(int);
245		i = 0;
246		do
247			i += *ip++;
248		while (--j);
249		endoftapemark.s_spcl.c_checksum = CHECKSUM - i;
250	}
251	if (vflag || command == 't')
252		printdumpinfo();
253	dumptime = _time64_to_time(spcl.c_ddate);
254	dumpdate = _time64_to_time(spcl.c_date);
255	if (stat(".", &stbuf) < 0) {
256		fprintf(stderr, "cannot stat .: %s\n", strerror(errno));
257		done(1);
258	}
259	if (stbuf.st_blksize > 0 && stbuf.st_blksize < TP_BSIZE )
260		fssize = TP_BSIZE;
261	if (stbuf.st_blksize >= TP_BSIZE && stbuf.st_blksize <= MAXBSIZE)
262		fssize = stbuf.st_blksize;
263	if (((fssize - 1) & fssize) != 0) {
264		fprintf(stderr, "bad block size %ld\n", fssize);
265		done(1);
266	}
267	if (spcl.c_volume != 1) {
268		fprintf(stderr, "Tape is not volume 1 of the dump\n");
269		done(1);
270	}
271	if (gethead(&spcl) == FAIL) {
272		dprintf(stdout, "header read failed at %ld blocks\n", blksread);
273		panic("no header after volume mark!\n");
274	}
275	findinode(&spcl);
276	if (spcl.c_type != TS_CLRI) {
277		fprintf(stderr, "Cannot find file removal list\n");
278		done(1);
279	}
280	maxino = (spcl.c_count * TP_BSIZE * NBBY) + 1;
281	dprintf(stdout, "maxino = %d\n", maxino);
282	map = calloc((unsigned)1, (unsigned)howmany(maxino, NBBY));
283	if (map == NULL)
284		panic("no memory for active inode map\n");
285	usedinomap = map;
286	curfile.action = USING;
287	getfile(xtrmap, xtrmapskip, xtrmapskip);
288	if (spcl.c_type != TS_BITS) {
289		fprintf(stderr, "Cannot find file dump list\n");
290		done(1);
291	}
292	map = calloc((unsigned)1, (unsigned)howmany(maxino, NBBY));
293	if (map == (char *)NULL)
294		panic("no memory for file dump list\n");
295	dumpmap = map;
296	curfile.action = USING;
297	getfile(xtrmap, xtrmapskip, xtrmapskip);
298	/*
299	 * If there may be whiteout entries on the tape, pretend that the
300	 * whiteout inode exists, so that the whiteout entries can be
301	 * extracted.
302	 */
303	SETINO(WINO, dumpmap);
304	/* 'r' restores don't call getvol() for tape 1, so mark it as read. */
305	if (command == 'r')
306		tapesread = 1;
307}
308
309/*
310 * Prompt user to load a new dump volume.
311 * "Nextvol" is the next suggested volume to use.
312 * This suggested volume is enforced when doing full
313 * or incremental restores, but can be overridden by
314 * the user when only extracting a subset of the files.
315 */
316void
317getvol(long nextvol)
318{
319	int64_t prevtapea;
320	long i, newvol, savecnt;
321	union u_spcl tmpspcl;
322#	define tmpbuf tmpspcl.s_spcl
323	char buf[TP_BSIZE];
324
325	if (nextvol == 1) {
326		tapesread = 0;
327		gettingfile = 0;
328	}
329	prevtapea = tapeaddr;
330	savecnt = blksread;
331	if (pipein) {
332		if (nextvol != 1) {
333			panic("Changing volumes on pipe input?\n");
334			/* Avoid looping if we couldn't ask the user. */
335			if (yflag || ferror(terminal) || feof(terminal))
336				done(1);
337		}
338		if (volno == 1)
339			return;
340		goto gethdr;
341	}
342again:
343	if (pipein)
344		done(1); /* pipes do not get a second chance */
345	if (command == 'R' || command == 'r' || curfile.action != SKIP)
346		newvol = nextvol;
347	else
348		newvol = 0;
349	while (newvol <= 0) {
350		if (tapesread == 0) {
351			fprintf(stderr, "%s%s%s%s%s%s%s",
352			    "You have not read any tapes yet.\n",
353			    "If you are extracting just a few files,",
354			    " start with the last volume\n",
355			    "and work towards the first; restore",
356			    " can quickly skip tapes that\n",
357			    "have no further files to extract.",
358			    " Otherwise, begin with volume 1.\n");
359		} else {
360			fprintf(stderr, "You have read volumes");
361			strcpy(buf, ": ");
362			for (i = 0; i < 32; i++)
363				if (tapesread & (1 << i)) {
364					fprintf(stderr, "%s%ld", buf, i + 1);
365					strcpy(buf, ", ");
366				}
367			fprintf(stderr, "\n");
368		}
369		do	{
370			fprintf(stderr, "Specify next volume #: ");
371			(void) fflush(stderr);
372			if (fgets(buf, BUFSIZ, terminal) == NULL)
373				done(1);
374		} while (buf[0] == '\n');
375		newvol = atoi(buf);
376		if (newvol <= 0) {
377			fprintf(stderr,
378			    "Volume numbers are positive numerics\n");
379		}
380	}
381	if (newvol == volno) {
382		tapesread |= 1 << (volno - 1);
383		return;
384	}
385	closemt();
386	fprintf(stderr, "Mount tape volume %ld\n", newvol);
387	fprintf(stderr, "Enter ``none'' if there are no more tapes\n");
388	fprintf(stderr, "otherwise enter tape name (default: %s) ", magtape);
389	(void) fflush(stderr);
390	if (fgets(buf, BUFSIZ, terminal) == NULL)
391		done(1);
392	if (!strcmp(buf, "none\n")) {
393		terminateinput();
394		return;
395	}
396	if (buf[0] != '\n') {
397		(void) strcpy(magtape, buf);
398		magtape[strlen(magtape) - 1] = '\0';
399	}
400	if (pipecmdin) {
401		char volno[sizeof("2147483647")];
402
403		(void)sprintf(volno, "%ld", newvol);
404		if (setenv("RESTORE_VOLUME", volno, 1) == -1) {
405			fprintf(stderr, "Cannot set $RESTORE_VOLUME: %s\n",
406			    strerror(errno));
407			done(1);
408		}
409		popenfp = popen(magtape, "r");
410		mt = popenfp ? fileno(popenfp) : -1;
411	} else
412#ifdef RRESTORE
413	if (host)
414		mt = rmtopen(magtape, 0);
415	else
416#endif
417		mt = open(magtape, O_RDONLY, 0);
418
419	if (mt == -1) {
420		fprintf(stderr, "Cannot open %s\n", magtape);
421		volno = -1;
422		goto again;
423	}
424gethdr:
425	volno = newvol;
426	setdumpnum();
427	FLUSHTAPEBUF();
428	if (gethead(&tmpbuf) == FAIL) {
429		dprintf(stdout, "header read failed at %ld blocks\n", blksread);
430		fprintf(stderr, "tape is not dump tape\n");
431		volno = 0;
432		goto again;
433	}
434	if (tmpbuf.c_volume != volno) {
435		fprintf(stderr, "Wrong volume (%jd)\n",
436		    (intmax_t)tmpbuf.c_volume);
437		volno = 0;
438		goto again;
439	}
440	if (_time64_to_time(tmpbuf.c_date) != dumpdate ||
441	    _time64_to_time(tmpbuf.c_ddate) != dumptime) {
442		time_t t = _time64_to_time(tmpbuf.c_date);
443		fprintf(stderr, "Wrong dump date\n\tgot: %s", ctime(&t));
444		fprintf(stderr, "\twanted: %s", ctime(&dumpdate));
445		volno = 0;
446		goto again;
447	}
448	tapesread |= 1 << (volno - 1);
449	blksread = savecnt;
450 	/*
451 	 * If continuing from the previous volume, skip over any
452 	 * blocks read already at the end of the previous volume.
453 	 *
454 	 * If coming to this volume at random, skip to the beginning
455 	 * of the next record.
456 	 */
457	dprintf(stdout, "last rec %jd, tape starts with %jd\n",
458	    (intmax_t)prevtapea, (intmax_t)tmpbuf.c_tapea);
459 	if (tmpbuf.c_type == TS_TAPE) {
460 		if (curfile.action != USING) {
461			/*
462			 * XXX Dump incorrectly sets c_count to 1 in the
463			 * volume header of the first tape, so ignore
464			 * c_count when volno == 1.
465			 */
466			if (volno != 1)
467				for (i = tmpbuf.c_count; i > 0; i--)
468					readtape(buf);
469 		} else if (tmpbuf.c_tapea <= prevtapea) {
470			/*
471			 * Normally the value of c_tapea in the volume
472			 * header is the record number of the header itself.
473			 * However in the volume header following an EOT-
474			 * terminated tape, it is the record number of the
475			 * first continuation data block (dump bug?).
476			 *
477			 * The next record we want is `prevtapea + 1'.
478			 */
479 			i = prevtapea + 1 - tmpbuf.c_tapea;
480			dprintf(stderr, "Skipping %ld duplicate record%s.\n",
481				i, i > 1 ? "s" : "");
482 			while (--i >= 0)
483 				readtape(buf);
484 		}
485 	}
486	if (curfile.action == USING) {
487		if (volno == 1)
488			panic("active file into volume 1\n");
489		return;
490	}
491	(void) gethead(&spcl);
492	findinode(&spcl);
493	if (gettingfile) {
494		gettingfile = 0;
495		longjmp(restart, 1);
496	}
497}
498
499/*
500 * Handle unexpected EOF.
501 */
502static void
503terminateinput(void)
504{
505
506	if (gettingfile && curfile.action == USING) {
507		printf("Warning: %s %s\n",
508		    "End-of-input encountered while extracting", curfile.name);
509	}
510	curfile.name = "<name unknown>";
511	curfile.action = UNKNOWN;
512	curfile.mode = 0;
513	curfile.ino = maxino;
514	if (gettingfile) {
515		gettingfile = 0;
516		longjmp(restart, 1);
517	}
518}
519
520/*
521 * handle multiple dumps per tape by skipping forward to the
522 * appropriate one.
523 */
524static void
525setdumpnum(void)
526{
527	struct mtop tcom;
528
529	if (dumpnum == 1 || volno != 1)
530		return;
531	if (pipein) {
532		fprintf(stderr, "Cannot have multiple dumps on pipe input\n");
533		done(1);
534	}
535	tcom.mt_op = MTFSF;
536	tcom.mt_count = dumpnum - 1;
537#ifdef RRESTORE
538	if (host)
539		rmtioctl(MTFSF, dumpnum - 1);
540	else
541#endif
542		if (!pipecmdin && ioctl(mt, MTIOCTOP, (char *)&tcom) < 0)
543			fprintf(stderr, "ioctl MTFSF: %s\n", strerror(errno));
544}
545
546void
547printdumpinfo(void)
548{
549	time_t t;
550	t = _time64_to_time(spcl.c_date);
551	fprintf(stdout, "Dump   date: %s", ctime(&t));
552	t = _time64_to_time(spcl.c_ddate);
553	fprintf(stdout, "Dumped from: %s",
554	    (spcl.c_ddate == 0) ? "the epoch\n" : ctime(&t));
555	if (spcl.c_host[0] == '\0')
556		return;
557	fprintf(stderr, "Level %jd dump of %s on %s:%s\n",
558	    (intmax_t)spcl.c_level, spcl.c_filesys, spcl.c_host, spcl.c_dev);
559	fprintf(stderr, "Label: %s\n", spcl.c_label);
560}
561
562int
563extractfile(char *name)
564{
565	int flags;
566	uid_t uid;
567	gid_t gid;
568	mode_t mode;
569	int extsize;
570	struct timeval mtimep[2], ctimep[2];
571	struct entry *ep;
572	char *buf;
573
574	curfile.name = name;
575	curfile.action = USING;
576	mtimep[0].tv_sec = curfile.atime_sec;
577	mtimep[0].tv_usec = curfile.atime_nsec / 1000;
578	mtimep[1].tv_sec = curfile.mtime_sec;
579	mtimep[1].tv_usec = curfile.mtime_nsec / 1000;
580	ctimep[0].tv_sec = curfile.atime_sec;
581	ctimep[0].tv_usec = curfile.atime_nsec / 1000;
582	ctimep[1].tv_sec = curfile.birthtime_sec;
583	ctimep[1].tv_usec = curfile.birthtime_nsec / 1000;
584	extsize = curfile.extsize;
585	uid = getuid();
586	if (uid == 0)
587		uid = curfile.uid;
588	gid = curfile.gid;
589	mode = curfile.mode;
590	flags = curfile.file_flags;
591	switch (mode & IFMT) {
592
593	default:
594		fprintf(stderr, "%s: unknown file mode 0%o\n", name, mode);
595		skipfile();
596		return (FAIL);
597
598	case IFSOCK:
599		vprintf(stdout, "skipped socket %s\n", name);
600		skipfile();
601		return (GOOD);
602
603	case IFDIR:
604		if (mflag) {
605			ep = lookupname(name);
606			if (ep == NULL || ep->e_flags & EXTRACT)
607				panic("unextracted directory %s\n", name);
608			skipfile();
609			return (GOOD);
610		}
611		vprintf(stdout, "extract file %s\n", name);
612		return (genliteraldir(name, curfile.ino));
613
614	case IFLNK:
615		lnkbuf[0] = '\0';
616		pathlen = 0;
617		buf = setupextattr(extsize);
618		getfile(xtrlnkfile, xtrattr, xtrlnkskip);
619		if (pathlen == 0) {
620			vprintf(stdout,
621			    "%s: zero length symbolic link (ignored)\n", name);
622			return (GOOD);
623		}
624		if (linkit(lnkbuf, name, SYMLINK) == GOOD) {
625			if (extsize > 0)
626				set_extattr_link(name, buf, extsize);
627			(void) lchown(name, uid, gid);
628			(void) lchmod(name, mode);
629			(void) lutimes(name, ctimep);
630			(void) lutimes(name, mtimep);
631			(void) lchflags(name, flags);
632			return (GOOD);
633		}
634		return (FAIL);
635
636	case IFIFO:
637		vprintf(stdout, "extract fifo %s\n", name);
638		if (Nflag) {
639			skipfile();
640			return (GOOD);
641		}
642		if (uflag)
643			(void) unlink(name);
644		if (mkfifo(name, 0600) < 0) {
645			fprintf(stderr, "%s: cannot create fifo: %s\n",
646			    name, strerror(errno));
647			skipfile();
648			return (FAIL);
649		}
650		if (extsize == 0) {
651			skipfile();
652		} else {
653			buf = setupextattr(extsize);
654			getfile(xtrnull, xtrattr, xtrnull);
655			set_extattr_file(name, buf, extsize);
656		}
657		(void) chown(name, uid, gid);
658		(void) chmod(name, mode);
659		(void) utimes(name, ctimep);
660		(void) utimes(name, mtimep);
661		(void) chflags(name, flags);
662		return (GOOD);
663
664	case IFCHR:
665	case IFBLK:
666		vprintf(stdout, "extract special file %s\n", name);
667		if (Nflag) {
668			skipfile();
669			return (GOOD);
670		}
671		if (uflag)
672			(void) unlink(name);
673		if (mknod(name, (mode & (IFCHR | IFBLK)) | 0600,
674		    (int)curfile.rdev) < 0) {
675			fprintf(stderr, "%s: cannot create special file: %s\n",
676			    name, strerror(errno));
677			skipfile();
678			return (FAIL);
679		}
680		if (extsize == 0) {
681			skipfile();
682		} else {
683			buf = setupextattr(extsize);
684			getfile(xtrnull, xtrattr, xtrnull);
685			set_extattr_file(name, buf, extsize);
686		}
687		(void) chown(name, uid, gid);
688		(void) chmod(name, mode);
689		(void) utimes(name, ctimep);
690		(void) utimes(name, mtimep);
691		(void) chflags(name, flags);
692		return (GOOD);
693
694	case IFREG:
695		vprintf(stdout, "extract file %s\n", name);
696		if (Nflag) {
697			skipfile();
698			return (GOOD);
699		}
700		if (uflag)
701			(void) unlink(name);
702		if ((ofile = open(name, O_WRONLY | O_CREAT | O_TRUNC,
703		    0600)) < 0) {
704			fprintf(stderr, "%s: cannot create file: %s\n",
705			    name, strerror(errno));
706			skipfile();
707			return (FAIL);
708		}
709		buf = setupextattr(extsize);
710		getfile(xtrfile, xtrattr, xtrskip);
711		if (extsize > 0)
712			set_extattr_fd(ofile, name, buf, extsize);
713		(void) fchown(ofile, uid, gid);
714		(void) fchmod(ofile, mode);
715		(void) futimes(ofile, ctimep);
716		(void) futimes(ofile, mtimep);
717		(void) fchflags(ofile, flags);
718		(void) close(ofile);
719		return (GOOD);
720	}
721	/* NOTREACHED */
722}
723
724/*
725 * Set attributes for a file.
726 */
727void
728set_extattr_file(char *name, void *buf, int size)
729{
730	struct extattr *eap, *eaend;
731
732	vprintf(stdout, "Set attributes for %s:", name);
733	eaend = buf + size;
734	for (eap = buf; eap < eaend; eap = EXTATTR_NEXT(eap)) {
735		/*
736		 * Make sure this entry is complete.
737		 */
738		if (EXTATTR_NEXT(eap) > eaend || eap->ea_length <= 0) {
739			dprintf(stdout, "\n\t%scorrupted",
740				eap == buf ? "" : "remainder ");
741			break;
742		}
743		if (eap->ea_namespace == EXTATTR_NAMESPACE_EMPTY)
744			continue;
745		vprintf(stdout, "\n\t%s, (%d bytes), %*s",
746			namespace_names[eap->ea_namespace], eap->ea_length,
747			eap->ea_namelength, eap->ea_name);
748		/*
749		 * First we try the general attribute setting interface.
750		 * However, some attributes can only be set by root or
751		 * by using special interfaces (for example, ACLs).
752		 */
753		if (extattr_set_file(name, eap->ea_namespace, eap->ea_name,
754		    EXTATTR_CONTENT(eap), EXTATTR_CONTENT_SIZE(eap)) != -1) {
755			dprintf(stdout, " (set using extattr_set_file)");
756			continue;
757		}
758		/*
759		 * If the general interface refuses to set the attribute,
760		 * then we try all the specialized interfaces that we
761		 * know about.
762		 */
763		if (eap->ea_namespace == EXTATTR_NAMESPACE_SYSTEM &&
764		    !strcmp(eap->ea_name, POSIX1E_ACL_ACCESS_EXTATTR_NAME)) {
765			if (acl_set_file(name, ACL_TYPE_ACCESS,
766			    EXTATTR_CONTENT(eap)) != -1) {
767				dprintf(stdout, " (set using acl_set_file)");
768				continue;
769			}
770		}
771		if (eap->ea_namespace == EXTATTR_NAMESPACE_SYSTEM &&
772		    !strcmp(eap->ea_name, POSIX1E_ACL_DEFAULT_EXTATTR_NAME)) {
773			if (acl_set_file(name, ACL_TYPE_DEFAULT,
774			    EXTATTR_CONTENT(eap)) != -1) {
775				dprintf(stdout, " (set using acl_set_file)");
776				continue;
777			}
778		}
779		vprintf(stdout, " (unable to set)");
780	}
781	vprintf(stdout, "\n");
782}
783
784/*
785 * Set attributes for a symbolic link.
786 */
787static void
788set_extattr_link(char *name, void *buf, int size)
789{
790	struct extattr *eap, *eaend;
791
792	vprintf(stdout, "Set attributes for %s:", name);
793	eaend = buf + size;
794	for (eap = buf; eap < eaend; eap = EXTATTR_NEXT(eap)) {
795		/*
796		 * Make sure this entry is complete.
797		 */
798		if (EXTATTR_NEXT(eap) > eaend || eap->ea_length <= 0) {
799			dprintf(stdout, "\n\t%scorrupted",
800				eap == buf ? "" : "remainder ");
801			break;
802		}
803		if (eap->ea_namespace == EXTATTR_NAMESPACE_EMPTY)
804			continue;
805		vprintf(stdout, "\n\t%s, (%d bytes), %*s",
806			namespace_names[eap->ea_namespace], eap->ea_length,
807			eap->ea_namelength, eap->ea_name);
808		/*
809		 * First we try the general attribute setting interface.
810		 * However, some attributes can only be set by root or
811		 * by using special interfaces (for example, ACLs).
812		 */
813		if (extattr_set_link(name, eap->ea_namespace, eap->ea_name,
814		    EXTATTR_CONTENT(eap), EXTATTR_CONTENT_SIZE(eap)) != -1) {
815			dprintf(stdout, " (set using extattr_set_link)");
816			continue;
817		}
818		/*
819		 * If the general interface refuses to set the attribute,
820		 * then we try all the specialized interfaces that we
821		 * know about.
822		 */
823		if (eap->ea_namespace == EXTATTR_NAMESPACE_SYSTEM &&
824		    !strcmp(eap->ea_name, POSIX1E_ACL_ACCESS_EXTATTR_NAME)) {
825			if (acl_set_link_np(name, ACL_TYPE_ACCESS,
826			    EXTATTR_CONTENT(eap)) != -1) {
827				dprintf(stdout, " (set using acl_set_link_np)");
828				continue;
829			}
830		}
831		if (eap->ea_namespace == EXTATTR_NAMESPACE_SYSTEM &&
832		    !strcmp(eap->ea_name, POSIX1E_ACL_DEFAULT_EXTATTR_NAME)) {
833			if (acl_set_link_np(name, ACL_TYPE_DEFAULT,
834			    EXTATTR_CONTENT(eap)) != -1) {
835				dprintf(stdout, " (set using acl_set_link_np)");
836				continue;
837			}
838		}
839		vprintf(stdout, " (unable to set)");
840	}
841	vprintf(stdout, "\n");
842}
843
844/*
845 * Set attributes on a file descriptor.
846 */
847static void
848set_extattr_fd(int fd, char *name, void *buf, int size)
849{
850	struct extattr *eap, *eaend;
851
852	vprintf(stdout, "Set attributes for %s:", name);
853	eaend = buf + size;
854	for (eap = buf; eap < eaend; eap = EXTATTR_NEXT(eap)) {
855		/*
856		 * Make sure this entry is complete.
857		 */
858		if (EXTATTR_NEXT(eap) > eaend || eap->ea_length <= 0) {
859			dprintf(stdout, "\n\t%scorrupted",
860				eap == buf ? "" : "remainder ");
861			break;
862		}
863		if (eap->ea_namespace == EXTATTR_NAMESPACE_EMPTY)
864			continue;
865		vprintf(stdout, "\n\t%s, (%d bytes), %*s",
866			namespace_names[eap->ea_namespace], eap->ea_length,
867			eap->ea_namelength, eap->ea_name);
868		/*
869		 * First we try the general attribute setting interface.
870		 * However, some attributes can only be set by root or
871		 * by using special interfaces (for example, ACLs).
872		 */
873		if (extattr_set_fd(fd, eap->ea_namespace, eap->ea_name,
874		    EXTATTR_CONTENT(eap), EXTATTR_CONTENT_SIZE(eap)) != -1) {
875			dprintf(stdout, " (set using extattr_set_fd)");
876			continue;
877		}
878		/*
879		 * If the general interface refuses to set the attribute,
880		 * then we try all the specialized interfaces that we
881		 * know about.
882		 */
883		if (eap->ea_namespace == EXTATTR_NAMESPACE_SYSTEM &&
884		    !strcmp(eap->ea_name, POSIX1E_ACL_ACCESS_EXTATTR_NAME)) {
885			if (acl_set_fd(fd, EXTATTR_CONTENT(eap)) != -1) {
886				dprintf(stdout, " (set using acl_set_fd)");
887				continue;
888			}
889		}
890		if (eap->ea_namespace == EXTATTR_NAMESPACE_SYSTEM &&
891		    !strcmp(eap->ea_name, POSIX1E_ACL_DEFAULT_EXTATTR_NAME)) {
892			if (acl_set_file(name, ACL_TYPE_DEFAULT,
893			    EXTATTR_CONTENT(eap)) != -1) {
894				dprintf(stdout, " (set using acl_set_file)");
895				continue;
896			}
897		}
898		vprintf(stdout, " (unable to set)");
899	}
900	vprintf(stdout, "\n");
901}
902
903/*
904 * skip over bit maps on the tape
905 */
906void
907skipmaps(void)
908{
909
910	while (spcl.c_type == TS_BITS || spcl.c_type == TS_CLRI)
911		skipfile();
912}
913
914/*
915 * skip over a file on the tape
916 */
917void
918skipfile(void)
919{
920
921	curfile.action = SKIP;
922	getfile(xtrnull, xtrnull, xtrnull);
923}
924
925/*
926 * Extract a file from the tape.
927 * When an allocated block is found it is passed to the fill function;
928 * when an unallocated block (hole) is found, a zeroed buffer is passed
929 * to the skip function.
930 */
931void
932getfile(void (*datafill)(char *, long), void (*attrfill)(char *, long),
933	void (*skip)(char *, long))
934{
935	int i;
936	off_t size;
937	int curblk, attrsize;
938	void (*fillit)(char *, long);
939	static char clearedbuf[MAXBSIZE];
940	char buf[MAXBSIZE / TP_BSIZE][TP_BSIZE];
941	char junk[TP_BSIZE];
942
943	curblk = 0;
944	size = spcl.c_size;
945	attrsize = spcl.c_extsize;
946	if (spcl.c_type == TS_END)
947		panic("ran off end of tape\n");
948	if (spcl.c_magic != FS_UFS2_MAGIC)
949		panic("not at beginning of a file\n");
950	if (!gettingfile && setjmp(restart) != 0)
951		return;
952	gettingfile++;
953	fillit = datafill;
954	if (size == 0 && attrsize > 0) {
955		fillit = attrfill;
956		size = attrsize;
957		attrsize = 0;
958	}
959loop:
960	for (i = 0; i < spcl.c_count; i++) {
961		if (!readmapflag && i > TP_NINDIR) {
962			if (Dflag) {
963				fprintf(stderr, "spcl.c_count = %jd\n",
964				    (intmax_t)spcl.c_count);
965				break;
966			} else
967				panic("spcl.c_count = %jd\n",
968				    (intmax_t)spcl.c_count);
969		}
970		if (readmapflag || spcl.c_addr[i]) {
971			readtape(&buf[curblk++][0]);
972			if (curblk == fssize / TP_BSIZE) {
973				(*fillit)((char *)buf, (long)(size > TP_BSIZE ?
974				     fssize : (curblk - 1) * TP_BSIZE + size));
975				curblk = 0;
976			}
977		} else {
978			if (curblk > 0) {
979				(*fillit)((char *)buf, (long)(size > TP_BSIZE ?
980				     curblk * TP_BSIZE :
981				     (curblk - 1) * TP_BSIZE + size));
982				curblk = 0;
983			}
984			(*skip)(clearedbuf, (long)(size > TP_BSIZE ?
985				TP_BSIZE : size));
986		}
987		if ((size -= TP_BSIZE) <= 0) {
988			if (size > -TP_BSIZE && curblk > 0) {
989				(*fillit)((char *)buf,
990					(long)((curblk * TP_BSIZE) + size));
991				curblk = 0;
992			}
993			if (attrsize > 0) {
994				fillit = attrfill;
995				size = attrsize;
996				attrsize = 0;
997				continue;
998			}
999			if (spcl.c_count - i > 1)
1000				dprintf(stdout, "skipping %d junk block(s)\n",
1001					spcl.c_count - i - 1);
1002			for (i++; i < spcl.c_count; i++) {
1003				if (!readmapflag && i > TP_NINDIR) {
1004					if (Dflag) {
1005						fprintf(stderr,
1006						    "spcl.c_count = %jd\n",
1007						    (intmax_t)spcl.c_count);
1008						break;
1009					} else
1010						panic("spcl.c_count = %jd\n",
1011						    (intmax_t)spcl.c_count);
1012				}
1013				if (readmapflag || spcl.c_addr[i])
1014					readtape(junk);
1015			}
1016			break;
1017		}
1018	}
1019	if (gethead(&spcl) == GOOD && size > 0) {
1020		if (spcl.c_type == TS_ADDR)
1021			goto loop;
1022		dprintf(stdout,
1023			"Missing address (header) block for %s at %ld blocks\n",
1024			curfile.name, blksread);
1025	}
1026	if (curblk > 0)
1027		panic("getfile: lost data\n");
1028	findinode(&spcl);
1029	gettingfile = 0;
1030}
1031
1032/*
1033 * These variables are shared between the next two functions.
1034 */
1035static int extbufsize = 0;
1036static char *extbuf;
1037static int extloc;
1038
1039/*
1040 * Allocate a buffer into which to extract extended attributes.
1041 */
1042static char *
1043setupextattr(int extsize)
1044{
1045
1046	extloc = 0;
1047	if (extsize <= extbufsize)
1048		return (extbuf);
1049	if (extbufsize > 0)
1050		free(extbuf);
1051	if ((extbuf = malloc(extsize)) != NULL) {
1052		extbufsize = extsize;
1053		return (extbuf);
1054	}
1055	extbufsize = 0;
1056	extbuf = NULL;
1057	fprintf(stderr, "Cannot extract %d bytes %s for inode %d, name %s\n",
1058	    extsize, "of extended attributes", curfile.ino, curfile.name);
1059	return (NULL);
1060}
1061
1062/*
1063 * Extract the next block of extended attributes.
1064 */
1065static void
1066xtrattr(char *buf, long size)
1067{
1068
1069	if (extloc + size > extbufsize)
1070		panic("overrun attribute buffer\n");
1071	memmove(&extbuf[extloc], buf, size);
1072	extloc += size;
1073}
1074
1075/*
1076 * Write out the next block of a file.
1077 */
1078static void
1079xtrfile(char *buf, long	size)
1080{
1081
1082	if (Nflag)
1083		return;
1084	if (write(ofile, buf, (int) size) == -1) {
1085		fprintf(stderr,
1086		    "write error extracting inode %d, name %s\nwrite: %s\n",
1087			curfile.ino, curfile.name, strerror(errno));
1088	}
1089}
1090
1091/*
1092 * Skip over a hole in a file.
1093 */
1094/* ARGSUSED */
1095static void
1096xtrskip(char *buf, long size)
1097{
1098
1099	if (lseek(ofile, size, SEEK_CUR) == -1) {
1100		fprintf(stderr,
1101		    "seek error extracting inode %d, name %s\nlseek: %s\n",
1102			curfile.ino, curfile.name, strerror(errno));
1103		done(1);
1104	}
1105}
1106
1107/*
1108 * Collect the next block of a symbolic link.
1109 */
1110static void
1111xtrlnkfile(char *buf, long size)
1112{
1113
1114	pathlen += size;
1115	if (pathlen > MAXPATHLEN) {
1116		fprintf(stderr, "symbolic link name: %s->%s%s; too long %d\n",
1117		    curfile.name, lnkbuf, buf, pathlen);
1118		done(1);
1119	}
1120	(void) strcat(lnkbuf, buf);
1121}
1122
1123/*
1124 * Skip over a hole in a symbolic link (should never happen).
1125 */
1126/* ARGSUSED */
1127static void
1128xtrlnkskip(char *buf, long size)
1129{
1130
1131	fprintf(stderr, "unallocated block in symbolic link %s\n",
1132		curfile.name);
1133	done(1);
1134}
1135
1136/*
1137 * Collect the next block of a bit map.
1138 */
1139static void
1140xtrmap(char *buf, long size)
1141{
1142
1143	memmove(map, buf, size);
1144	map += size;
1145}
1146
1147/*
1148 * Skip over a hole in a bit map (should never happen).
1149 */
1150/* ARGSUSED */
1151static void
1152xtrmapskip(char *buf, long size)
1153{
1154
1155	panic("hole in map\n");
1156	map += size;
1157}
1158
1159/*
1160 * Noop, when an extraction function is not needed.
1161 */
1162/* ARGSUSED */
1163void
1164xtrnull(char *buf, long size)
1165{
1166
1167	return;
1168}
1169
1170/*
1171 * Read TP_BSIZE blocks from the input.
1172 * Handle read errors, and end of media.
1173 */
1174static void
1175readtape(char *buf)
1176{
1177	long rd, newvol, i, oldnumtrec;
1178	int cnt, seek_failed;
1179
1180	if (blkcnt + (byteslide > 0) < numtrec) {
1181		memmove(buf, &tapebuf[(blkcnt++ * TP_BSIZE) + byteslide], (long)TP_BSIZE);
1182		blksread++;
1183		tapeaddr++;
1184		return;
1185	}
1186	if (numtrec > 0)
1187		memmove(&tapebuf[-TP_BSIZE],
1188		    &tapebuf[(numtrec-1) * TP_BSIZE], (long)TP_BSIZE);
1189	oldnumtrec = numtrec;
1190	for (i = 0; i < ntrec; i++)
1191		((struct s_spcl *)&tapebuf[i * TP_BSIZE])->c_magic = 0;
1192	if (numtrec == 0)
1193		numtrec = ntrec;
1194	cnt = ntrec * TP_BSIZE;
1195	rd = 0;
1196getmore:
1197#ifdef RRESTORE
1198	if (host)
1199		i = rmtread(&tapebuf[rd], cnt);
1200	else
1201#endif
1202		i = read(mt, &tapebuf[rd], cnt);
1203	/*
1204	 * Check for mid-tape short read error.
1205	 * If found, skip rest of buffer and start with the next.
1206	 */
1207	if (!pipein && !pipecmdin && numtrec < ntrec && i > 0) {
1208		dprintf(stdout, "mid-media short read error.\n");
1209		numtrec = ntrec;
1210	}
1211	/*
1212	 * Handle partial block read.
1213	 */
1214	if ((pipein || pipecmdin) && i == 0 && rd > 0)
1215		i = rd;
1216	else if (i > 0 && i != ntrec * TP_BSIZE) {
1217		if (pipein || pipecmdin) {
1218			rd += i;
1219			cnt -= i;
1220			if (cnt > 0)
1221				goto getmore;
1222			i = rd;
1223		} else {
1224			/*
1225			 * Short read. Process the blocks read.
1226			 */
1227			if (i % TP_BSIZE != 0)
1228				vprintf(stdout,
1229				    "partial block read: %ld should be %ld\n",
1230				    i, ntrec * TP_BSIZE);
1231			numtrec = i / TP_BSIZE;
1232		}
1233	}
1234	/*
1235	 * Handle read error.
1236	 */
1237	if (i < 0) {
1238		fprintf(stderr, "Tape read error while ");
1239		switch (curfile.action) {
1240		default:
1241			fprintf(stderr, "trying to set up tape\n");
1242			break;
1243		case UNKNOWN:
1244			fprintf(stderr, "trying to resynchronize\n");
1245			break;
1246		case USING:
1247			fprintf(stderr, "restoring %s\n", curfile.name);
1248			break;
1249		case SKIP:
1250			fprintf(stderr, "skipping over inode %d\n",
1251				curfile.ino);
1252			break;
1253		}
1254		if (!yflag && !reply("continue"))
1255			done(1);
1256		i = ntrec * TP_BSIZE;
1257		memset(tapebuf, 0, i);
1258#ifdef RRESTORE
1259		if (host)
1260			seek_failed = (rmtseek(i, 1) < 0);
1261		else
1262#endif
1263			seek_failed = (lseek(mt, i, SEEK_CUR) == (off_t)-1);
1264
1265		if (seek_failed) {
1266			fprintf(stderr,
1267			    "continuation failed: %s\n", strerror(errno));
1268			done(1);
1269		}
1270	}
1271	/*
1272	 * Handle end of tape.
1273	 */
1274	if (i == 0) {
1275		vprintf(stdout, "End-of-tape encountered\n");
1276		if (!pipein) {
1277			newvol = volno + 1;
1278			volno = 0;
1279			numtrec = 0;
1280			getvol(newvol);
1281			readtape(buf);
1282			return;
1283		}
1284		if (rd % TP_BSIZE != 0)
1285			panic("partial block read: %ld should be %ld\n",
1286				rd, ntrec * TP_BSIZE);
1287		terminateinput();
1288		memmove(&tapebuf[rd], &endoftapemark, (long)TP_BSIZE);
1289	}
1290	if (oldnumtrec == 0)
1291		blkcnt = 0;
1292	else
1293		blkcnt -= oldnumtrec;
1294	memmove(buf,
1295	    &tapebuf[(blkcnt++ * TP_BSIZE) + byteslide], (long)TP_BSIZE);
1296	blksread++;
1297	tapeaddr++;
1298}
1299
1300static void
1301findtapeblksize(void)
1302{
1303	long i;
1304
1305	for (i = 0; i < ntrec; i++)
1306		((struct s_spcl *)&tapebuf[i * TP_BSIZE])->c_magic = 0;
1307	blkcnt = 0;
1308#ifdef RRESTORE
1309	if (host)
1310		i = rmtread(tapebuf, ntrec * TP_BSIZE);
1311	else
1312#endif
1313		i = read(mt, tapebuf, ntrec * TP_BSIZE);
1314
1315	if (i <= 0) {
1316		fprintf(stderr, "tape read error: %s\n", strerror(errno));
1317		done(1);
1318	}
1319	if (i % TP_BSIZE != 0) {
1320		fprintf(stderr, "Tape block size (%ld) %s (%d)\n",
1321			i, "is not a multiple of dump block size", TP_BSIZE);
1322		done(1);
1323	}
1324	ntrec = i / TP_BSIZE;
1325	numtrec = ntrec;
1326	vprintf(stdout, "Tape block size is %ld\n", ntrec);
1327}
1328
1329void
1330closemt(void)
1331{
1332
1333	if (mt < 0)
1334		return;
1335	if (pipecmdin) {
1336		pclose(popenfp);
1337		popenfp = NULL;
1338	} else
1339#ifdef RRESTORE
1340	if (host)
1341		rmtclose();
1342	else
1343#endif
1344		(void) close(mt);
1345}
1346
1347/*
1348 * Read the next block from the tape.
1349 * If it is not any valid header, return an error.
1350 */
1351static int
1352gethead(struct s_spcl *buf)
1353{
1354	long i;
1355
1356	readtape((char *)buf);
1357	if (buf->c_magic != FS_UFS2_MAGIC && buf->c_magic != NFS_MAGIC) {
1358		if (buf->c_magic == OFS_MAGIC) {
1359			fprintf(stderr,
1360			    "Format of dump tape is too old. Must use\n");
1361			fprintf(stderr,
1362			    "a version of restore from before 2002.\n");
1363			return (FAIL);
1364		}
1365		if (swabl(buf->c_magic) != FS_UFS2_MAGIC &&
1366		    buf->c_magic != NFS_MAGIC) {
1367			if (buf->c_magic == OFS_MAGIC) {
1368				fprintf(stderr,
1369				  "Format of dump tape is too old. Must use\n");
1370				fprintf(stderr,
1371				  "a version of restore from before 2002.\n");
1372			}
1373			return (FAIL);
1374		}
1375		if (!Bcvt) {
1376			vprintf(stdout, "Note: Doing Byte swapping\n");
1377			Bcvt = 1;
1378		}
1379	}
1380	if (checksum((int *)buf) == FAIL)
1381		return (FAIL);
1382	if (Bcvt) {
1383		swabst((u_char *)"8l4s1q8l2q17l", (u_char *)buf);
1384		swabst((u_char *)"l",(u_char *) &buf->c_level);
1385		swabst((u_char *)"2l4q",(u_char *) &buf->c_flags);
1386	}
1387	readmapflag = 0;
1388
1389	switch (buf->c_type) {
1390
1391	case TS_CLRI:
1392	case TS_BITS:
1393		/*
1394		 * Have to patch up missing information in bit map headers
1395		 */
1396		buf->c_size = buf->c_count * TP_BSIZE;
1397		if (buf->c_count > TP_NINDIR)
1398			readmapflag = 1;
1399		else
1400			for (i = 0; i < buf->c_count; i++)
1401				buf->c_addr[i]++;
1402		/* FALL THROUGH */
1403
1404	case TS_TAPE:
1405		if (buf->c_magic == NFS_MAGIC &&
1406		    (buf->c_flags & NFS_DR_NEWINODEFMT) == 0)
1407			oldinofmt = 1;
1408		/* FALL THROUGH */
1409
1410	case TS_END:
1411		buf->c_inumber = 0;
1412		/* FALL THROUGH */
1413
1414	case TS_ADDR:
1415	case TS_INODE:
1416		/*
1417		 * For old dump tapes, have to copy up old fields to
1418		 * new locations.
1419		 */
1420		if (buf->c_magic == NFS_MAGIC) {
1421			buf->c_tapea = buf->c_old_tapea;
1422			buf->c_firstrec = buf->c_old_firstrec;
1423			buf->c_date = _time32_to_time(buf->c_old_date);
1424			buf->c_ddate = _time32_to_time(buf->c_old_ddate);
1425			buf->c_atime = _time32_to_time(buf->c_old_atime);
1426			buf->c_mtime = _time32_to_time(buf->c_old_mtime);
1427			buf->c_birthtime = 0;
1428			buf->c_birthtimensec = 0;
1429			buf->c_extsize = 0;
1430		}
1431		break;
1432
1433	default:
1434		panic("gethead: unknown inode type %d\n", buf->c_type);
1435		break;
1436	}
1437	if (dumpdate != 0 && _time64_to_time(buf->c_date) != dumpdate)
1438		fprintf(stderr, "Header with wrong dumpdate.\n");
1439	/*
1440	 * If we're restoring a filesystem with the old (FreeBSD 1)
1441	 * format inodes, copy the uid/gid to the new location
1442	 */
1443	if (oldinofmt) {
1444		buf->c_uid = buf->c_spare1[1];
1445		buf->c_gid = buf->c_spare1[2];
1446	}
1447	buf->c_magic = FS_UFS2_MAGIC;
1448	tapeaddr = buf->c_tapea;
1449	if (dflag)
1450		accthdr(buf);
1451	return(GOOD);
1452}
1453
1454/*
1455 * Check that a header is where it belongs and predict the next header
1456 */
1457static void
1458accthdr(struct s_spcl *header)
1459{
1460	static ino_t previno = 0x7fffffff;
1461	static int prevtype;
1462	static long predict;
1463	long blks, i;
1464
1465	if (header->c_type == TS_TAPE) {
1466		fprintf(stderr, "Volume header ");
1467 		if (header->c_firstrec)
1468 			fprintf(stderr, "begins with record %jd",
1469			    (intmax_t)header->c_firstrec);
1470 		fprintf(stderr, "\n");
1471		previno = 0x7fffffff;
1472		return;
1473	}
1474	if (previno == 0x7fffffff)
1475		goto newcalc;
1476	switch (prevtype) {
1477	case TS_BITS:
1478		fprintf(stderr, "Dumped inodes map header");
1479		break;
1480	case TS_CLRI:
1481		fprintf(stderr, "Used inodes map header");
1482		break;
1483	case TS_INODE:
1484		fprintf(stderr, "File header, ino %d", previno);
1485		break;
1486	case TS_ADDR:
1487		fprintf(stderr, "File continuation header, ino %d", previno);
1488		break;
1489	case TS_END:
1490		fprintf(stderr, "End of tape header");
1491		break;
1492	}
1493	if (predict != blksread - 1)
1494		fprintf(stderr, "; predicted %ld blocks, got %ld blocks",
1495			predict, blksread - 1);
1496	fprintf(stderr, "\n");
1497newcalc:
1498	blks = 0;
1499	if (header->c_type != TS_END)
1500		for (i = 0; i < header->c_count; i++)
1501			if (readmapflag || header->c_addr[i] != 0)
1502				blks++;
1503	predict = blks;
1504	blksread = 0;
1505	prevtype = header->c_type;
1506	previno = header->c_inumber;
1507}
1508
1509/*
1510 * Find an inode header.
1511 * Complain if had to skip.
1512 */
1513static void
1514findinode(struct s_spcl *header)
1515{
1516	static long skipcnt = 0;
1517	long i;
1518	char buf[TP_BSIZE];
1519	int htype;
1520
1521	curfile.name = "<name unknown>";
1522	curfile.action = UNKNOWN;
1523	curfile.mode = 0;
1524	curfile.ino = 0;
1525	do {
1526		htype = header->c_type;
1527		switch (htype) {
1528
1529		case TS_ADDR:
1530			/*
1531			 * Skip up to the beginning of the next record
1532			 */
1533			for (i = 0; i < header->c_count; i++)
1534				if (header->c_addr[i])
1535					readtape(buf);
1536			while (gethead(header) == FAIL ||
1537			    _time64_to_time(header->c_date) != dumpdate) {
1538				skipcnt++;
1539				if (Dflag) {
1540					byteslide++;
1541					if (byteslide < TP_BSIZE) {
1542						blkcnt--;
1543						blksread--;
1544					} else
1545						byteslide = 0;
1546				}
1547			}
1548			break;
1549
1550		case TS_INODE:
1551			curfile.mode = header->c_mode;
1552			curfile.uid = header->c_uid;
1553			curfile.gid = header->c_gid;
1554			curfile.file_flags = header->c_file_flags;
1555			curfile.rdev = header->c_rdev;
1556			curfile.atime_sec = header->c_atime;
1557			curfile.atime_nsec = header->c_atimensec;
1558			curfile.mtime_sec = header->c_mtime;
1559			curfile.mtime_nsec = header->c_mtimensec;
1560			curfile.birthtime_sec = header->c_birthtime;
1561			curfile.birthtime_nsec = header->c_birthtimensec;
1562			curfile.extsize = header->c_extsize;
1563			curfile.size = header->c_size;
1564			curfile.ino = header->c_inumber;
1565			break;
1566
1567		case TS_END:
1568			/* If we missed some tapes, get another volume. */
1569			if (tapesread & (tapesread + 1)) {
1570				getvol(0);
1571				continue;
1572			}
1573			curfile.ino = maxino;
1574			break;
1575
1576		case TS_CLRI:
1577			curfile.name = "<file removal list>";
1578			break;
1579
1580		case TS_BITS:
1581			curfile.name = "<file dump list>";
1582			break;
1583
1584		case TS_TAPE:
1585			if (Dflag)
1586				fprintf(stderr, "unexpected tape header\n");
1587			else
1588				panic("unexpected tape header\n");
1589
1590		default:
1591			if (Dflag)
1592				fprintf(stderr, "unknown tape header type %d\n",
1593				    spcl.c_type);
1594			else
1595				panic("unknown tape header type %d\n",
1596				    spcl.c_type);
1597			while (gethead(header) == FAIL ||
1598			    _time64_to_time(header->c_date) != dumpdate) {
1599				skipcnt++;
1600				if (Dflag) {
1601					byteslide++;
1602					if (byteslide < TP_BSIZE) {
1603						blkcnt--;
1604						blksread--;
1605					} else
1606						byteslide = 0;
1607				}
1608			}
1609
1610		}
1611	} while (htype == TS_ADDR);
1612	if (skipcnt > 0)
1613		fprintf(stderr, "resync restore, skipped %ld %s\n",
1614		    skipcnt, Dflag ? "bytes" : "blocks");
1615	skipcnt = 0;
1616}
1617
1618static int
1619checksum(int *buf)
1620{
1621	int i, j;
1622
1623	j = sizeof(union u_spcl) / sizeof(int);
1624	i = 0;
1625	if (!Bcvt) {
1626		do
1627			i += *buf++;
1628		while (--j);
1629	} else {
1630		/* What happens if we want to read restore tapes
1631			for a 16bit int machine??? */
1632		do
1633			i += swabl(*buf++);
1634		while (--j);
1635	}
1636
1637	if (i != CHECKSUM) {
1638		fprintf(stderr, "Checksum error %o, inode %d file %s\n", i,
1639			curfile.ino, curfile.name);
1640		return(FAIL);
1641	}
1642	return(GOOD);
1643}
1644
1645#ifdef RRESTORE
1646#include <stdarg.h>
1647
1648void
1649msg(const char *fmt, ...)
1650{
1651	va_list ap;
1652	va_start(ap, fmt);
1653	(void)vfprintf(stderr, fmt, ap);
1654	va_end(ap);
1655}
1656#endif /* RRESTORE */
1657
1658static u_char *
1659swabshort(u_char *sp, int n)
1660{
1661	char c;
1662
1663	while (--n >= 0) {
1664		c = sp[0]; sp[0] = sp[1]; sp[1] = c;
1665		sp += 2;
1666	}
1667	return (sp);
1668}
1669
1670static u_char *
1671swablong(u_char *sp, int n)
1672{
1673	char c;
1674
1675	while (--n >= 0) {
1676		c = sp[0]; sp[0] = sp[3]; sp[3] = c;
1677		c = sp[2]; sp[2] = sp[1]; sp[1] = c;
1678		sp += 4;
1679	}
1680	return (sp);
1681}
1682
1683static u_char *
1684swabquad(u_char *sp, int n)
1685{
1686	char c;
1687
1688	while (--n >= 0) {
1689		c = sp[0]; sp[0] = sp[7]; sp[7] = c;
1690		c = sp[1]; sp[1] = sp[6]; sp[6] = c;
1691		c = sp[2]; sp[2] = sp[5]; sp[5] = c;
1692		c = sp[3]; sp[3] = sp[4]; sp[4] = c;
1693		sp += 8;
1694	}
1695	return (sp);
1696}
1697
1698void
1699swabst(u_char *cp, u_char *sp)
1700{
1701	int n = 0;
1702
1703	while (*cp) {
1704		switch (*cp) {
1705		case '0': case '1': case '2': case '3': case '4':
1706		case '5': case '6': case '7': case '8': case '9':
1707			n = (n * 10) + (*cp++ - '0');
1708			continue;
1709
1710		case 's': case 'w': case 'h':
1711			if (n == 0)
1712				n = 1;
1713			sp = swabshort(sp, n);
1714			break;
1715
1716		case 'l':
1717			if (n == 0)
1718				n = 1;
1719			sp = swablong(sp, n);
1720			break;
1721
1722		case 'q':
1723			if (n == 0)
1724				n = 1;
1725			sp = swabquad(sp, n);
1726			break;
1727
1728		case 'b':
1729			if (n == 0)
1730				n = 1;
1731			sp += n;
1732			break;
1733
1734		default:
1735			fprintf(stderr, "Unknown conversion character: %c\n",
1736			    *cp);
1737			done(0);
1738			break;
1739		}
1740		cp++;
1741		n = 0;
1742	}
1743}
1744
1745static u_long
1746swabl(u_long x)
1747{
1748	swabst((u_char *)"l", (u_char *)&x);
1749	return (x);
1750}
1751