summaryrefslogtreecommitdiffstats
path: root/sbin/dump/main.c
blob: 827ffcc129f37bd556c58fe14100262014fc28fb (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
/*-
 * Copyright (c) 1980, 1991, 1993, 1994
 *	The Regents of the University of California.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#ifndef lint
static const char copyright[] =
"@(#) Copyright (c) 1980, 1991, 1993, 1994\n\
	The Regents of the University of California.  All rights reserved.\n";
#endif /* not lint */

#ifndef lint
#if 0
static char sccsid[] = "@(#)main.c	8.6 (Berkeley) 5/1/95";
#endif
static const char rcsid[] =
  "$FreeBSD$";
#endif /* not lint */

#include <sys/param.h>
#include <sys/stat.h>
#include <sys/time.h>
#include <sys/mount.h>
#include <sys/disklabel.h>

#include <ufs/ufs/dinode.h>
#include <ufs/ufs/ufsmount.h>
#include <ufs/ffs/fs.h>

#include <protocols/dumprestore.h>

#include <ctype.h>
#include <err.h>
#include <errno.h>
#include <fcntl.h>
#include <fstab.h>
#include <limits.h>
#include <signal.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <timeconv.h>
#include <unistd.h>

#include "dump.h"
#include "pathnames.h"

int	notify = 0;	/* notify operator flag */
int	snapdump = 0;	/* dumping live filesystem, so use snapshot */
int	blockswritten = 0;	/* number of blocks written on current tape */
int	tapeno = 0;	/* current tape number */
int	density = 0;	/* density in bytes/0.1" " <- this is for hilit19 */
int	ntrec = NTREC;	/* # tape blocks in each tape record */
int	cartridge = 0;	/* Assume non-cartridge tape */
int	cachesize = 0;	/* block cache size (in bytes), defaults to 0 */
long	dev_bsize = 1;	/* recalculated below */
long	blocksperfile;	/* output blocks per file */
char	*host = NULL;	/* remote host (if any) */

/*
 * Possible superblock locations ordered from most to least likely.
 */
static int sblock_try[] = SBLOCKSEARCH;

static char *getmntpt(char *, int *);
static long numarg(const char *, long, long);
static void obsolete(int *, char **[]);
static void usage(void) __dead2;

int
main(int argc, char *argv[])
{
	struct stat sb;
	ino_t ino;
	int dirty;
	union dinode *dp;
	struct fstab *dt;
	char *map, *mntpt;
	int ch, mode, mntflags;
	int i, anydirskipped, bflag = 0, Tflag = 0, honorlevel = 1;
	int just_estimate = 0;
	ino_t maxino;
	char *tmsg;

	spcl.c_date = _time_to_time64(time(NULL));

	tsize = 0;	/* Default later, based on 'c' option for cart tapes */
	dumpdates = _PATH_DUMPDATES;
	popenout = NULL;
	tape = NULL;
	temp = _PATH_DTMP;
	if (TP_BSIZE / DEV_BSIZE == 0 || TP_BSIZE % DEV_BSIZE != 0)
		quit("TP_BSIZE must be a multiple of DEV_BSIZE\n");
	level = '0';

	if (argc < 2)
		usage();

	obsolete(&argc, &argv);
	while ((ch = getopt(argc, argv,
	    "0123456789aB:b:C:cD:d:f:h:LnP:Ss:T:uWw")) != -1)
		switch (ch) {
		/* dump level */
		case '0': case '1': case '2': case '3': case '4':
		case '5': case '6': case '7': case '8': case '9':
			level = ch;
			break;

		case 'a':		/* `auto-size', Write to EOM. */
			unlimited = 1;
			break;

		case 'B':		/* blocks per output file */
			blocksperfile = numarg("number of blocks per file",
			    1L, 0L);
			break;

		case 'b':		/* blocks per tape write */
			ntrec = numarg("number of blocks per write",
			    1L, 1000L);
			break;

		case 'C':
			cachesize = numarg("cachesize", 0, 0) * 1024 * 1024;
			break;

		case 'c':		/* Tape is cart. not 9-track */
			cartridge = 1;
			break;

		case 'D':
			dumpdates = optarg;
			break;

		case 'd':		/* density, in bits per inch */
			density = numarg("density", 10L, 327670L) / 10;
			if (density >= 625 && !bflag)
				ntrec = HIGHDENSITYTREC;
			break;

		case 'f':		/* output file */
			if (popenout != NULL)
				errx(X_STARTUP, "You cannot use the P and f "
				    "flags together.\n");
			tape = optarg;
			break;

		case 'h':
			honorlevel = numarg("honor level", 0L, 10L);
			break;

		case 'L':
			snapdump = 1;
			break;

		case 'n':		/* notify operators */
			notify = 1;
			break;

		case 'P':
			if (tape != NULL)
				errx(X_STARTUP, "You cannot use the P and f "
				    "flags together.\n");
			popenout = optarg;
			break;

		case 'S':               /* exit after estimating # of tapes */
			just_estimate = 1;
			break;

		case 's':		/* tape size, feet */
			tsize = numarg("tape size", 1L, 0L) * 12 * 10;
			break;

		case 'T':		/* time of last dump */
			spcl.c_ddate = unctime(optarg);
			if (spcl.c_ddate < 0) {
				(void)fprintf(stderr, "bad time \"%s\"\n",
				    optarg);
				exit(X_STARTUP);
			}
			Tflag = 1;
			lastlevel = '?';
			break;

		case 'u':		/* update /etc/dumpdates */
			uflag = 1;
			break;

		case 'W':		/* what to do */
		case 'w':
			lastdump(ch);
			exit(X_FINOK);	/* do nothing else */

		default:
			usage();
		}
	argc -= optind;
	argv += optind;

	if (argc < 1) {
		(void)fprintf(stderr, "Must specify disk or file system\n");
		exit(X_STARTUP);
	}
	disk = *argv++;
	argc--;
	if (argc >= 1) {
		(void)fprintf(stderr, "Unknown arguments to dump:");
		while (argc--)
			(void)fprintf(stderr, " %s", *argv++);
		(void)fprintf(stderr, "\n");
		exit(X_STARTUP);
	}
	if (Tflag && uflag) {
	        (void)fprintf(stderr,
		    "You cannot use the T and u flags together.\n");
		exit(X_STARTUP);
	}
	if (popenout) {
		tape = "child pipeline process";
	} else if (tape == NULL && (tape = getenv("TAPE")) == NULL)
		tape = _PATH_DEFTAPE;
	if (strcmp(tape, "-") == 0) {
		pipeout++;
		tape = "standard output";
	}

	if (blocksperfile)
		blocksperfile = blocksperfile / ntrec * ntrec; /* round down */
	else if (!unlimited) {
		/*
		 * Determine how to default tape size and density
		 *
		 *         	density				tape size
		 * 9-track	1600 bpi (160 bytes/.1")	2300 ft.
		 * 9-track	6250 bpi (625 bytes/.1")	2300 ft.
		 * cartridge	8000 bpi (100 bytes/.1")	1700 ft.
		 *						(450*4 - slop)
		 * hilit19 hits again: "
		 */
		if (density == 0)
			density = cartridge ? 100 : 160;
		if (tsize == 0)
			tsize = cartridge ? 1700L*120L : 2300L*120L;
	}

	if (strchr(tape, ':')) {
		host = tape;
		tape = strchr(host, ':');
		*tape++ = '\0';
#ifdef RDUMP
		if (index(tape, '\n')) {
		    (void)fprintf(stderr, "invalid characters in tape\n");
		    exit(X_STARTUP);
		}
		if (rmthost(host) == 0)
			exit(X_STARTUP);
#else
		(void)fprintf(stderr, "remote dump not enabled\n");
		exit(X_STARTUP);
#endif
	}
	(void)setuid(getuid()); /* rmthost() is the only reason to be setuid */

	if (signal(SIGHUP, SIG_IGN) != SIG_IGN)
		signal(SIGHUP, sig);
	if (signal(SIGTRAP, SIG_IGN) != SIG_IGN)
		signal(SIGTRAP, sig);
	if (signal(SIGFPE, SIG_IGN) != SIG_IGN)
		signal(SIGFPE, sig);
	if (signal(SIGBUS, SIG_IGN) != SIG_IGN)
		signal(SIGBUS, sig);
	if (signal(SIGSEGV, SIG_IGN) != SIG_IGN)
		signal(SIGSEGV, sig);
	if (signal(SIGTERM, SIG_IGN) != SIG_IGN)
		signal(SIGTERM, sig);
	if (signal(SIGINT, interrupt) == SIG_IGN)
		signal(SIGINT, SIG_IGN);

	dump_getfstab();	/* /etc/fstab snarfed */
	/*
	 *	disk can be either the full special file name,
	 *	the suffix of the special file name,
	 *	the special name missing the leading '/',
	 *	the file system name with or without the leading '/'.
	 */
	dt = fstabsearch(disk);
	if (dt != NULL) {
		disk = rawname(dt->fs_spec);
 		if (disk == NULL)
 			errx(X_STARTUP, "%s: unknown file system", dt->fs_spec);
		(void)strncpy(spcl.c_dev, dt->fs_spec, NAMELEN);
		(void)strncpy(spcl.c_filesys, dt->fs_file, NAMELEN);
	} else {
		(void)strncpy(spcl.c_dev, disk, NAMELEN);
		(void)strncpy(spcl.c_filesys, "an unlisted file system",
		    NAMELEN);
	}
	spcl.c_dev[NAMELEN-1]='\0';
	spcl.c_filesys[NAMELEN-1]='\0';

	if ((mntpt = getmntpt(disk, &mntflags)) != 0) {
		if (mntflags & MNT_RDONLY) {
			if (snapdump != 0) {
				msg("WARNING: %s\n",
				    "-L ignored for read-only filesystem.");
				snapdump = 0;
			}
		} else if (snapdump == 0) {
			msg("WARNING: %s\n",
			    "should use -L when dumping live read-write "
			    "filesystems!");
		} else {
			char snapname[BUFSIZ], snapcmd[BUFSIZ];

			snprintf(snapname, sizeof snapname, "%s/.snap", mntpt);
			if ((stat(snapname, &sb) < 0) || !S_ISDIR(sb.st_mode)) {
				msg("WARNING: %s %s\n",
				    "-L requested but snapshot location",
				    snapname);
				msg("         %s: %s\n",
				    "is not a directory",
				    "dump downgraded, -L ignored");
				snapdump = 0;
			} else {
				snprintf(snapname, sizeof snapname,
				    "%s/.snap/dump_snapshot", mntpt);
				snprintf(snapcmd, sizeof snapcmd, "%s %s %s",
				    _PATH_MKSNAP_FFS, mntpt, snapname);
				unlink(snapname);
				if (system(snapcmd) != 0)
					errx(X_STARTUP, "Cannot create %s: %s\n",
					    snapname, strerror(errno));
				if ((diskfd = open(snapname, O_RDONLY)) < 0) {
					unlink(snapname);
					errx(X_STARTUP, "Cannot open %s: %s\n",
					    snapname, strerror(errno));
				}
				unlink(snapname);
				if (fstat(diskfd, &sb) != 0)
					err(X_STARTUP, "%s: stat", snapname);
				spcl.c_date = _time_to_time64(sb.st_mtime);
			}
		}
	} else if (snapdump != 0) {
		msg("WARNING: Cannot use -L on an unmounted filesystem.\n");
		snapdump = 0;
	}
	if (snapdump == 0) {
		if ((diskfd = open(disk, O_RDONLY)) < 0)
			err(X_STARTUP, "Cannot open %s", disk);
		if (fstat(diskfd, &sb) != 0)
			err(X_STARTUP, "%s: stat", disk);
		if (S_ISDIR(sb.st_mode))
			errx(X_STARTUP, "%s: unknown file system", disk);
	}

	(void)strcpy(spcl.c_label, "none");
	(void)gethostname(spcl.c_host, NAMELEN);
	spcl.c_level = level - '0';
	spcl.c_type = TS_TAPE;

	if (spcl.c_date == 0) {
		tmsg = "the epoch\n";
	} else {
		time_t t = _time64_to_time(spcl.c_date);
		tmsg = ctime(&t);
	}
	msg("Date of this level %c dump: %s", level, tmsg);

	if (!Tflag)
	        getdumptime();		/* /etc/dumpdates snarfed */
	if (spcl.c_ddate == 0) {
		tmsg = "the epoch\n";
	} else {
		time_t t = _time64_to_time(spcl.c_ddate);
		tmsg = ctime(&t);
	}
 	msg("Date of last level %c dump: %s", lastlevel, tmsg);

	msg("Dumping %s%s ", snapdump ? "snapshot of ": "", disk);
	if (dt != NULL)
		msgtail("(%s) ", dt->fs_file);
	if (host)
		msgtail("to %s on host %s\n", tape, host);
	else
		msgtail("to %s\n", tape);

	sync();
	sblock = (struct fs *)sblock_buf;
	for (i = 0; sblock_try[i] != -1; i++) {
		sblock->fs_fsize = SBLOCKSIZE; /* needed in bread */
		bread(sblock_try[i] >> dev_bshift, (char *) sblock, SBLOCKSIZE);
		if ((sblock->fs_magic == FS_UFS1_MAGIC ||
		     (sblock->fs_magic == FS_UFS2_MAGIC &&
		      sblock->fs_sblockloc == sblock_try[i])) &&
		    sblock->fs_bsize <= MAXBSIZE &&
		    sblock->fs_bsize >= sizeof(struct fs))
			break;
	}
	if (sblock_try[i] == -1)
		quit("Cannot find file system superblock\n");
	dev_bsize = sblock->fs_fsize / fsbtodb(sblock, 1);
	dev_bshift = ffs(dev_bsize) - 1;
	if (dev_bsize != (1 << dev_bshift))
		quit("dev_bsize (%ld) is not a power of 2", dev_bsize);
	tp_bshift = ffs(TP_BSIZE) - 1;
	if (TP_BSIZE != (1 << tp_bshift))
		quit("TP_BSIZE (%d) is not a power of 2", TP_BSIZE);
	maxino = sblock->fs_ipg * sblock->fs_ncg;
	mapsize = roundup(howmany(maxino, CHAR_BIT), TP_BSIZE);
	usedinomap = (char *)calloc((unsigned) mapsize, sizeof(char));
	dumpdirmap = (char *)calloc((unsigned) mapsize, sizeof(char));
	dumpinomap = (char *)calloc((unsigned) mapsize, sizeof(char));
	tapesize = 3 * (howmany(mapsize * sizeof(char), TP_BSIZE) + 1);

	nonodump = spcl.c_level < honorlevel;

	passno = 1;
	setproctitle("%s: pass 1: regular files", disk);
	msg("mapping (Pass I) [regular files]\n");
	anydirskipped = mapfiles(maxino, &tapesize);

	passno = 2;
	setproctitle("%s: pass 2: directories", disk);
	msg("mapping (Pass II) [directories]\n");
	while (anydirskipped) {
		anydirskipped = mapdirs(maxino, &tapesize);
	}

	if (pipeout || unlimited) {
		tapesize += 10;	/* 10 trailer blocks */
		msg("estimated %ld tape blocks.\n", tapesize);
	} else {
		double fetapes;

		if (blocksperfile)
			fetapes = (double) tapesize / blocksperfile;
		else if (cartridge) {
			/* Estimate number of tapes, assuming streaming stops at
			   the end of each block written, and not in mid-block.
			   Assume no erroneous blocks; this can be compensated
			   for with an artificially low tape size. */
			fetapes =
			(	  (double) tapesize	/* blocks */
				* TP_BSIZE	/* bytes/block */
				* (1.0/density)	/* 0.1" / byte " */
			  +
				  (double) tapesize	/* blocks */
				* (1.0/ntrec)	/* streaming-stops per block */
				* 15.48		/* 0.1" / streaming-stop " */
			) * (1.0 / tsize );	/* tape / 0.1" " */
		} else {
			/* Estimate number of tapes, for old fashioned 9-track
			   tape */
			int tenthsperirg = (density == 625) ? 3 : 7;
			fetapes =
			(	  (double) tapesize	/* blocks */
				* TP_BSIZE	/* bytes / block */
				* (1.0/density)	/* 0.1" / byte " */
			  +
				  (double) tapesize	/* blocks */
				* (1.0/ntrec)	/* IRG's / block */
				* tenthsperirg	/* 0.1" / IRG " */
			) * (1.0 / tsize );	/* tape / 0.1" " */
		}
		etapes = fetapes;		/* truncating assignment */
		etapes++;
		/* count the dumped inodes map on each additional tape */
		tapesize += (etapes - 1) *
			(howmany(mapsize * sizeof(char), TP_BSIZE) + 1);
		tapesize += etapes + 10;	/* headers + 10 trailer blks */
		msg("estimated %ld tape blocks on %3.2f tape(s).\n",
		    tapesize, fetapes);
	}

        /*
         * If the user only wants an estimate of the number of
         * tapes, exit now.
         */
        if (just_estimate)
                exit(0);

	/*
	 * Allocate tape buffer.
	 */
	if (!alloctape())
		quit(
	"can't allocate tape buffers - try a smaller blocking factor.\n");

	startnewtape(1);
	(void)time((time_t *)&(tstart_writing));
	dumpmap(usedinomap, TS_CLRI, maxino - 1);

	passno = 3;
	setproctitle("%s: pass 3: directories", disk);
	msg("dumping (Pass III) [directories]\n");
	dirty = 0;		/* XXX just to get gcc to shut up */
	for (map = dumpdirmap, ino = 1; ino < maxino; ino++) {
		if (((ino - 1) % CHAR_BIT) == 0)	/* map is offset by 1 */
			dirty = *map++;
		else
			dirty >>= 1;
		if ((dirty & 1) == 0)
			continue;
		/*
		 * Skip directory inodes deleted and maybe reallocated
		 */
		dp = getino(ino, &mode);
		if (mode != IFDIR)
			continue;
		(void)dumpino(dp, ino);
	}

	passno = 4;
	setproctitle("%s: pass 4: regular files", disk);
	msg("dumping (Pass IV) [regular files]\n");
	for (map = dumpinomap, ino = 1; ino < maxino; ino++) {
		if (((ino - 1) % CHAR_BIT) == 0)	/* map is offset by 1 */
			dirty = *map++;
		else
			dirty >>= 1;
		if ((dirty & 1) == 0)
			continue;
		/*
		 * Skip inodes deleted and reallocated as directories.
		 */
		dp = getino(ino, &mode);
		if (mode == IFDIR)
			continue;
		(void)dumpino(dp, ino);
	}

	(void)time((time_t *)&(tend_writing));
	spcl.c_type = TS_END;
	for (i = 0; i < ntrec; i++)
		writeheader(maxino - 1);
	if (pipeout)
		msg("DUMP: %jd tape blocks\n", (intmax_t)spcl.c_tapea);
	else
		msg("DUMP: %jd tape blocks on %d volume%s\n",
		    (intmax_t)spcl.c_tapea, spcl.c_volume,
		    (spcl.c_volume == 1) ? "" : "s");

	/* report dump performance, avoid division through zero */
	if (tend_writing - tstart_writing == 0)
		msg("finished in less than a second\n");
	else
		msg("finished in %jd seconds, throughput %jd KBytes/sec\n",
		    (intmax_t)tend_writing - tstart_writing, 
		    (intmax_t)(spcl.c_tapea / 
		    (tend_writing - tstart_writing)));

	putdumptime();
	trewind();
	broadcast("DUMP IS DONE!\a\a\n");
	msg("DUMP IS DONE\n");
	Exit(X_FINOK);
	/* NOTREACHED */
}

static void
usage(void)
{
	fprintf(stderr,
		"usage: dump [-0123456789acLnSu] [-B records] [-b blocksize] [-C cachesize]\n"
		"            [-D dumpdates] [-d density] [-f file | -P pipecommand] [-h level]\n"
		"            [-s feet] [-T date] filesystem\n"
		"       dump -W | -w\n");
	exit(X_STARTUP);
}

/*
 * Check to see if a disk is currently mounted.
 */
static char *
getmntpt(char *name, int *mntflagsp)
{
	long mntsize, i;
	struct statfs *mntbuf;

	mntsize = getmntinfo(&mntbuf, MNT_NOWAIT);
	for (i = 0; i < mntsize; i++) {
		if (!strcmp(mntbuf[i].f_mntfromname, name)) {
			*mntflagsp = mntbuf[i].f_flags;
			return (mntbuf[i].f_mntonname);
		}
	}
	return (0);
}

/*
 * Pick up a numeric argument.  It must be nonnegative and in the given
 * range (except that a vmax of 0 means unlimited).
 */
static long
numarg(const char *meaning, long vmin, long vmax)
{
	char *p;
	long val;

	val = strtol(optarg, &p, 10);
	if (*p)
		errx(1, "illegal %s -- %s", meaning, optarg);
	if (val < vmin || (vmax && val > vmax))
		errx(1, "%s must be between %ld and %ld", meaning, vmin, vmax);
	return (val);
}

void
sig(int signo)
{
	switch(signo) {
	case SIGALRM:
	case SIGBUS:
	case SIGFPE:
	case SIGHUP:
	case SIGTERM:
	case SIGTRAP:
		if (pipeout)
			quit("Signal on pipe: cannot recover\n");
		msg("Rewriting attempted as response to unknown signal.\n");
		(void)fflush(stderr);
		(void)fflush(stdout);
		close_rewind();
		exit(X_REWRITE);
		/* NOTREACHED */
	case SIGSEGV:
		msg("SIGSEGV: ABORTING!\n");
		(void)signal(SIGSEGV, SIG_DFL);
		(void)kill(0, SIGSEGV);
		/* NOTREACHED */
	}
}

char *
rawname(char *cp)
{
	struct stat sb;

	/*
	 * Ensure that the device passed in is a raw device.
	 */
	if (stat(cp, &sb) == 0 && (sb.st_mode & S_IFMT) == S_IFCHR)
		return (cp);

	/*
	 * Since there's only one device type now, we can't construct any
	 * better name, so we have to return NULL.
	 */
	return (NULL);
}

/*
 * obsolete --
 *	Change set of key letters and ordered arguments into something
 *	getopt(3) will like.
 */
static void
obsolete(int *argcp, char **argvp[])
{
	int argc, flags;
	char *ap, **argv, *flagsp, **nargv, *p;

	/* Setup. */
	argv = *argvp;
	argc = *argcp;

	/*
	 * Return if no arguments or first argument has leading
	 * dash or slash.
	 */
	ap = argv[1];
	if (argc == 1 || *ap == '-' || *ap == '/')
		return;

	/* Allocate space for new arguments. */
	if ((*argvp = nargv = malloc((argc + 1) * sizeof(char *))) == NULL ||
	    (p = flagsp = malloc(strlen(ap) + 2)) == NULL)
		err(1, NULL);

	*nargv++ = *argv;
	argv += 2;

	for (flags = 0; *ap; ++ap) {
		switch (*ap) {
		case 'B':
		case 'b':
		case 'd':
		case 'f':
		case 'D':
		case 'C':
		case 'h':
		case 's':
		case 'T':
			if (*argv == NULL) {
				warnx("option requires an argument -- %c", *ap);
				usage();
			}
			if ((nargv[0] = malloc(strlen(*argv) + 2 + 1)) == NULL)
				err(1, NULL);
			nargv[0][0] = '-';
			nargv[0][1] = *ap;
			(void)strcpy(&nargv[0][2], *argv);
			++argv;
			++nargv;
			break;
		default:
			if (!flags) {
				*p++ = '-';
				flags = 1;
			}
			*p++ = *ap;
			break;
		}
	}

	/* Terminate flags. */
	if (flags) {
		*p = '\0';
		*nargv++ = flagsp;
	}

	/* Copy remaining arguments. */
	while ((*nargv++ = *argv++));

	/* Update argument count. */
	*argcp = nargv - *argvp - 1;
}
OpenPOWER on IntegriCloud