xref: /freebsd/sbin/dump/main.c (revision e5b786625f7f82a1fa91e41823332459ea5550f9)
1 /*-
2  * SPDX-License-Identifier: BSD-3-Clause
3  *
4  * Copyright (c) 1980, 1991, 1993, 1994
5  *	The Regents of the University of California.  All rights reserved.
6  *
7  * Redistribution and use in source and binary forms, with or without
8  * modification, are permitted provided that the following conditions
9  * are met:
10  * 1. Redistributions of source code must retain the above copyright
11  *    notice, this list of conditions and the following disclaimer.
12  * 2. Redistributions in binary form must reproduce the above copyright
13  *    notice, this list of conditions and the following disclaimer in the
14  *    documentation and/or other materials provided with the distribution.
15  * 3. Neither the name of the University nor the names of its contributors
16  *    may be used to endorse or promote products derived from this software
17  *    without specific prior written permission.
18  *
19  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29  * SUCH DAMAGE.
30  */
31 
32 #ifndef lint
33 static const char copyright[] =
34 "@(#) Copyright (c) 1980, 1991, 1993, 1994\n\
35 	The Regents of the University of California.  All rights reserved.\n";
36 #endif /* not lint */
37 
38 #ifndef lint
39 #if 0
40 static char sccsid[] = "@(#)main.c	8.6 (Berkeley) 5/1/95";
41 #endif
42 #endif /* not lint */
43 
44 #include <sys/param.h>
45 #include <sys/stat.h>
46 #include <sys/mount.h>
47 #include <sys/disklabel.h>
48 
49 #include <ufs/ufs/extattr.h>
50 #include <ufs/ufs/quota.h>
51 #include <ufs/ufs/dinode.h>
52 #include <ufs/ufs/ufsmount.h>
53 #include <ufs/ffs/fs.h>
54 
55 #include <protocols/dumprestore.h>
56 
57 #include <ctype.h>
58 #include <err.h>
59 #include <errno.h>
60 #include <fcntl.h>
61 #include <fstab.h>
62 #include <libufs.h>
63 #include <limits.h>
64 #include <signal.h>
65 #include <stdint.h>
66 #include <stdio.h>
67 #include <stdlib.h>
68 #include <string.h>
69 #include <time.h>
70 #include <timeconv.h>
71 #include <unistd.h>
72 
73 #include "dump.h"
74 #include "pathnames.h"
75 
76 int	mapsize;	/* size of the state maps */
77 char	*usedinomap;	/* map of allocated inodes */
78 char	*dumpdirmap;	/* map of directories to be dumped */
79 char	*dumpinomap;	/* map of files to be dumped */
80 char	*disk;		/* name of the disk file */
81 char	*tape;		/* name of the tape file */
82 char	*popenout;	/* popen(3) per-"tape" command */
83 int	level;		/* dump level of this dump */
84 int	uflag;		/* update flag */
85 int	diskfd;		/* disk file descriptor */
86 int	pipeout;	/* true => output to standard output */
87 int	density = 0;	/* density in bytes/0.1" " <- this is for hilit19 */
88 long	tapesize;	/* estimated tape size, blocks */
89 long	tsize;		/* tape size in 0.1" units */
90 int	etapes;		/* estimated number of tapes */
91 int	nonodump;	/* if set, do not honor UF_NODUMP user flags */
92 int	unlimited;	/* if set, write to end of medium */
93 int	cachesize = 0;	/* block cache size (in bytes), defaults to 0 */
94 int	rsync_friendly;	/* be friendly with rsync */
95 int	notify = 0;	/* notify operator flag */
96 int	blockswritten = 0; /* number of blocks written on current tape */
97 int	tapeno = 0;	/* current tape number */
98 int	ntrec = NTREC;	/* # tape blocks in each tape record */
99 long	blocksperfile;	/* number of blocks per output file */
100 int	cartridge = 0;	/* Assume non-cartridge tape */
101 char	*host = NULL;	/* remote host (if any) */
102 time_t	tstart_writing;	/* when started writing the first tape block */
103 time_t	tend_writing;	/* after writing the last tape block */
104 int	passno;		/* current dump pass number */
105 struct	fs *sblock;	/* the file system super block */
106 long	dev_bsize = 1;	/* recalculated below */
107 int	dev_bshift;	/* log2(dev_bsize) */
108 int	tp_bshift;	/* log2(TP_BSIZE) */
109 int	snapdump = 0;	/* dumping live filesystem, so use snapshot */
110 
111 static char *getmntpt(char *, int *);
112 static long numarg(const char *, long, long);
113 static void obsolete(int *, char **[]);
114 static void usage(void) __dead2;
115 
116 int
117 main(int argc, char *argv[])
118 {
119 	struct stat sb;
120 	ino_t ino;
121 	int dirty;
122 	union dinode *dp;
123 	struct fstab *dt;
124 	char *map, *mntpt;
125 	int ch, mode, mntflags;
126 	int i, ret, anydirskipped, bflag = 0, Tflag = 0, honorlevel = 1;
127 	int just_estimate = 0;
128 	ino_t maxino;
129 	char *tmsg;
130 
131 	spcl.c_date = _time_to_time64(time(NULL));
132 
133 	tsize = 0;	/* Default later, based on 'c' option for cart tapes */
134 	dumpdates = _PATH_DUMPDATES;
135 	popenout = NULL;
136 	tape = NULL;
137 	if (TP_BSIZE / DEV_BSIZE == 0 || TP_BSIZE % DEV_BSIZE != 0)
138 		quit("TP_BSIZE must be a multiple of DEV_BSIZE\n");
139 	level = 0;
140 	rsync_friendly = 0;
141 
142 	if (argc < 2)
143 		usage();
144 
145 	obsolete(&argc, &argv);
146 	while ((ch = getopt(argc, argv,
147 	    "0123456789aB:b:C:cD:d:f:h:LnP:RrSs:T:uWw")) != -1)
148 		switch (ch) {
149 		/* dump level */
150 		case '0': case '1': case '2': case '3': case '4':
151 		case '5': case '6': case '7': case '8': case '9':
152 			level = 10 * level + ch - '0';
153 			break;
154 
155 		case 'a':		/* `auto-size', Write to EOM. */
156 			unlimited = 1;
157 			break;
158 
159 		case 'B':		/* blocks per output file */
160 			blocksperfile = numarg("number of blocks per file",
161 			    1L, 0L);
162 			break;
163 
164 		case 'b':		/* blocks per tape write */
165 			ntrec = numarg("number of blocks per write",
166 			    1L, 1000L);
167 			break;
168 
169 		case 'C':
170 			cachesize = numarg("cachesize", 0, 0) * 1024 * 1024;
171 			break;
172 
173 		case 'c':		/* Tape is cart. not 9-track */
174 			cartridge = 1;
175 			break;
176 
177 		case 'D':
178 			dumpdates = optarg;
179 			break;
180 
181 		case 'd':		/* density, in bits per inch */
182 			density = numarg("density", 10L, 327670L) / 10;
183 			if (density >= 625 && !bflag)
184 				ntrec = HIGHDENSITYTREC;
185 			break;
186 
187 		case 'f':		/* output file */
188 			if (popenout != NULL)
189 				errx(X_STARTUP, "You cannot use the P and f "
190 				    "flags together.\n");
191 			tape = optarg;
192 			break;
193 
194 		case 'h':
195 			honorlevel = numarg("honor level", 0L, 10L);
196 			break;
197 
198 		case 'L':
199 			snapdump = 1;
200 			break;
201 
202 		case 'n':		/* notify operators */
203 			notify = 1;
204 			break;
205 
206 		case 'P':
207 			if (tape != NULL)
208 				errx(X_STARTUP, "You cannot use the P and f "
209 				    "flags together.\n");
210 			popenout = optarg;
211 			break;
212 
213 		case 'r': /* store slightly less data to be friendly to rsync */
214 			if (rsync_friendly < 1)
215 				rsync_friendly = 1;
216 			break;
217 
218 		case 'R': /* store even less data to be friendlier to rsync */
219 			if (rsync_friendly < 2)
220 				rsync_friendly = 2;
221 			break;
222 
223 		case 'S':               /* exit after estimating # of tapes */
224 			just_estimate = 1;
225 			break;
226 
227 		case 's':		/* tape size, feet */
228 			tsize = numarg("tape size", 1L, 0L) * 12 * 10;
229 			break;
230 
231 		case 'T':		/* time of last dump */
232 			spcl.c_ddate = unctime(optarg);
233 			if (spcl.c_ddate < 0) {
234 				(void)fprintf(stderr, "bad time \"%s\"\n",
235 				    optarg);
236 				exit(X_STARTUP);
237 			}
238 			Tflag = 1;
239 			lastlevel = -1;
240 			break;
241 
242 		case 'u':		/* update /etc/dumpdates */
243 			uflag = 1;
244 			break;
245 
246 		case 'W':		/* what to do */
247 		case 'w':
248 			lastdump(ch);
249 			exit(X_FINOK);	/* do nothing else */
250 
251 		default:
252 			usage();
253 		}
254 	argc -= optind;
255 	argv += optind;
256 
257 	if (argc < 1) {
258 		(void)fprintf(stderr, "Must specify disk or file system\n");
259 		exit(X_STARTUP);
260 	}
261 	disk = *argv++;
262 	argc--;
263 	if (argc >= 1) {
264 		(void)fprintf(stderr, "Unknown arguments to dump:");
265 		while (argc--)
266 			(void)fprintf(stderr, " %s", *argv++);
267 		(void)fprintf(stderr, "\n");
268 		exit(X_STARTUP);
269 	}
270 	if (rsync_friendly && (level > 0)) {
271 		(void)fprintf(stderr, "%s %s\n", "rsync friendly options",
272 		    "can be used only with level 0 dumps.");
273 		exit(X_STARTUP);
274 	}
275 	if (Tflag && uflag) {
276 	        (void)fprintf(stderr,
277 		    "You cannot use the T and u flags together.\n");
278 		exit(X_STARTUP);
279 	}
280 	if (popenout) {
281 		tape = "child pipeline process";
282 	} else if (tape == NULL && (tape = getenv("TAPE")) == NULL)
283 		tape = _PATH_DEFTAPE;
284 	if (strcmp(tape, "-") == 0) {
285 		pipeout++;
286 		tape = "standard output";
287 	}
288 
289 	if (blocksperfile)
290 		blocksperfile = rounddown(blocksperfile, ntrec);
291 	else if (!unlimited) {
292 		/*
293 		 * Determine how to default tape size and density
294 		 *
295 		 *         	density				tape size
296 		 * 9-track	1600 bpi (160 bytes/.1")	2300 ft.
297 		 * 9-track	6250 bpi (625 bytes/.1")	2300 ft.
298 		 * cartridge	8000 bpi (100 bytes/.1")	1700 ft.
299 		 *						(450*4 - slop)
300 		 * hilit19 hits again: "
301 		 */
302 		if (density == 0)
303 			density = cartridge ? 100 : 160;
304 		if (tsize == 0)
305 			tsize = cartridge ? 1700L*120L : 2300L*120L;
306 	}
307 
308 	if (strchr(tape, ':')) {
309 		host = tape;
310 		tape = strchr(host, ':');
311 		*tape++ = '\0';
312 #ifdef RDUMP
313 		if (strchr(tape, '\n')) {
314 		    (void)fprintf(stderr, "invalid characters in tape\n");
315 		    exit(X_STARTUP);
316 		}
317 		if (rmthost(host) == 0)
318 			exit(X_STARTUP);
319 #else
320 		(void)fprintf(stderr, "remote dump not enabled\n");
321 		exit(X_STARTUP);
322 #endif
323 	}
324 	(void)setuid(getuid()); /* rmthost() is the only reason to be setuid */
325 
326 	if (signal(SIGHUP, SIG_IGN) != SIG_IGN)
327 		signal(SIGHUP, sig);
328 	if (signal(SIGTRAP, SIG_IGN) != SIG_IGN)
329 		signal(SIGTRAP, sig);
330 	if (signal(SIGFPE, SIG_IGN) != SIG_IGN)
331 		signal(SIGFPE, sig);
332 	if (signal(SIGBUS, SIG_IGN) != SIG_IGN)
333 		signal(SIGBUS, sig);
334 	if (signal(SIGSEGV, SIG_IGN) != SIG_IGN)
335 		signal(SIGSEGV, sig);
336 	if (signal(SIGTERM, SIG_IGN) != SIG_IGN)
337 		signal(SIGTERM, sig);
338 	if (signal(SIGINT, interrupt) == SIG_IGN)
339 		signal(SIGINT, SIG_IGN);
340 
341 	dump_getfstab();	/* /etc/fstab snarfed */
342 	/*
343 	 *	disk can be either the full special file name,
344 	 *	the suffix of the special file name,
345 	 *	the special name missing the leading '/',
346 	 *	the file system name with or without the leading '/'.
347 	 */
348 	dt = fstabsearch(disk);
349 	if (dt != NULL) {
350 		disk = rawname(dt->fs_spec);
351  		if (disk == NULL)
352  			errx(X_STARTUP, "%s: unknown file system", dt->fs_spec);
353 		(void)strncpy(spcl.c_dev, dt->fs_spec, NAMELEN);
354 		(void)strncpy(spcl.c_filesys, dt->fs_file, NAMELEN);
355 	} else {
356 		(void)strncpy(spcl.c_dev, disk, NAMELEN);
357 		(void)strncpy(spcl.c_filesys, "an unlisted file system",
358 		    NAMELEN);
359 	}
360 	spcl.c_dev[NAMELEN-1]='\0';
361 	spcl.c_filesys[NAMELEN-1]='\0';
362 
363 	if ((mntpt = getmntpt(disk, &mntflags)) != NULL) {
364 		if (mntflags & MNT_RDONLY) {
365 			if (snapdump != 0) {
366 				msg("WARNING: %s\n",
367 				    "-L ignored for read-only filesystem.");
368 				snapdump = 0;
369 			}
370 		} else if (snapdump == 0) {
371 			msg("WARNING: %s\n",
372 			    "should use -L when dumping live read-write "
373 			    "filesystems!");
374 		} else {
375 			char snapname[BUFSIZ], snapcmd[BUFSIZ];
376 
377 			snprintf(snapname, sizeof snapname, "%s/.snap", mntpt);
378 			if ((stat(snapname, &sb) < 0) || !S_ISDIR(sb.st_mode)) {
379 				msg("WARNING: %s %s\n",
380 				    "-L requested but snapshot location",
381 				    snapname);
382 				msg("         %s: %s\n",
383 				    "is not a directory",
384 				    "dump downgraded, -L ignored");
385 				snapdump = 0;
386 			} else {
387 				snprintf(snapname, sizeof snapname,
388 				    "%s/.snap/dump_snapshot", mntpt);
389 				snprintf(snapcmd, sizeof snapcmd, "%s %s %s",
390 				    _PATH_MKSNAP_FFS, mntpt, snapname);
391 				unlink(snapname);
392 				if (system(snapcmd) != 0)
393 					errx(X_STARTUP, "Cannot create %s: %s\n",
394 					    snapname, strerror(errno));
395 				if ((diskfd = open(snapname, O_RDONLY)) < 0) {
396 					unlink(snapname);
397 					errx(X_STARTUP, "Cannot open %s: %s\n",
398 					    snapname, strerror(errno));
399 				}
400 				unlink(snapname);
401 				if (fstat(diskfd, &sb) != 0)
402 					err(X_STARTUP, "%s: stat", snapname);
403 				spcl.c_date = _time_to_time64(sb.st_mtime);
404 			}
405 		}
406 	} else if (snapdump != 0) {
407 		msg("WARNING: Cannot use -L on an unmounted filesystem.\n");
408 		snapdump = 0;
409 	}
410 	if (snapdump == 0) {
411 		if ((diskfd = open(disk, O_RDONLY)) < 0)
412 			err(X_STARTUP, "Cannot open %s", disk);
413 		if (fstat(diskfd, &sb) != 0)
414 			err(X_STARTUP, "%s: stat", disk);
415 		if (S_ISDIR(sb.st_mode))
416 			errx(X_STARTUP, "%s: unknown file system", disk);
417 	}
418 
419 	(void)strcpy(spcl.c_label, "none");
420 	(void)gethostname(spcl.c_host, NAMELEN);
421 	spcl.c_level = level;
422 	spcl.c_type = TS_TAPE;
423 	if (rsync_friendly) {
424 		/* don't store real dump times */
425 		spcl.c_date = 0;
426 		spcl.c_ddate = 0;
427 	}
428 	if (spcl.c_date == 0) {
429 		tmsg = "the epoch\n";
430 	} else {
431 		time_t t = _time64_to_time(spcl.c_date);
432 		tmsg = ctime(&t);
433 	}
434 	msg("Date of this level %d dump: %s", level, tmsg);
435 
436 	if (!Tflag && (!rsync_friendly))
437 	        getdumptime();		/* /etc/dumpdates snarfed */
438 	if (spcl.c_ddate == 0) {
439 		tmsg = "the epoch\n";
440 	} else {
441 		time_t t = _time64_to_time(spcl.c_ddate);
442 		tmsg = ctime(&t);
443 	}
444 	if (lastlevel < 0)
445 		msg("Date of last (level unknown) dump: %s", tmsg);
446 	else
447 		msg("Date of last level %d dump: %s", lastlevel, tmsg);
448 
449 	msg("Dumping %s%s ", snapdump ? "snapshot of ": "", disk);
450 	if (dt != NULL)
451 		msgtail("(%s) ", dt->fs_file);
452 	if (host)
453 		msgtail("to %s on host %s\n", tape, host);
454 	else
455 		msgtail("to %s\n", tape);
456 
457 	sync();
458 	if ((ret = sbget(diskfd, &sblock, UFS_STDSB, UFS_NOCSUM)) != 0) {
459 		switch (ret) {
460 		case ENOENT:
461 			warn("Cannot find file system superblock");
462 			return (1);
463 		default:
464 			warn("Unable to read file system superblock");
465 			return (1);
466 		}
467 	}
468 	dev_bsize = sblock->fs_fsize / fsbtodb(sblock, 1);
469 	dev_bshift = ffs(dev_bsize) - 1;
470 	if (dev_bsize != (1 << dev_bshift))
471 		quit("dev_bsize (%ld) is not a power of 2", dev_bsize);
472 	tp_bshift = ffs(TP_BSIZE) - 1;
473 	if (TP_BSIZE != (1 << tp_bshift))
474 		quit("TP_BSIZE (%d) is not a power of 2", TP_BSIZE);
475 	maxino = sblock->fs_ipg * sblock->fs_ncg;
476 	mapsize = roundup(howmany(maxino, CHAR_BIT), TP_BSIZE);
477 	usedinomap = (char *)calloc((unsigned) mapsize, sizeof(char));
478 	dumpdirmap = (char *)calloc((unsigned) mapsize, sizeof(char));
479 	dumpinomap = (char *)calloc((unsigned) mapsize, sizeof(char));
480 	tapesize = 3 * (howmany(mapsize * sizeof(char), TP_BSIZE) + 1);
481 
482 	nonodump = spcl.c_level < honorlevel;
483 
484 	passno = 1;
485 	setproctitle("%s: pass 1: regular files", disk);
486 	msg("mapping (Pass I) [regular files]\n");
487 	anydirskipped = mapfiles(maxino, &tapesize);
488 
489 	passno = 2;
490 	setproctitle("%s: pass 2: directories", disk);
491 	msg("mapping (Pass II) [directories]\n");
492 	while (anydirskipped) {
493 		anydirskipped = mapdirs(maxino, &tapesize);
494 	}
495 
496 	if (pipeout || unlimited) {
497 		tapesize += 10;	/* 10 trailer blocks */
498 		msg("estimated %ld tape blocks.\n", tapesize);
499 	} else {
500 		double fetapes;
501 
502 		if (blocksperfile)
503 			fetapes = (double) tapesize / blocksperfile;
504 		else if (cartridge) {
505 			/* Estimate number of tapes, assuming streaming stops at
506 			   the end of each block written, and not in mid-block.
507 			   Assume no erroneous blocks; this can be compensated
508 			   for with an artificially low tape size. */
509 			fetapes =
510 			(	  (double) tapesize	/* blocks */
511 				* TP_BSIZE	/* bytes/block */
512 				* (1.0/density)	/* 0.1" / byte " */
513 			  +
514 				  (double) tapesize	/* blocks */
515 				* (1.0/ntrec)	/* streaming-stops per block */
516 				* 15.48		/* 0.1" / streaming-stop " */
517 			) * (1.0 / tsize );	/* tape / 0.1" " */
518 		} else {
519 			/* Estimate number of tapes, for old fashioned 9-track
520 			   tape */
521 			int tenthsperirg = (density == 625) ? 3 : 7;
522 			fetapes =
523 			(	  (double) tapesize	/* blocks */
524 				* TP_BSIZE	/* bytes / block */
525 				* (1.0/density)	/* 0.1" / byte " */
526 			  +
527 				  (double) tapesize	/* blocks */
528 				* (1.0/ntrec)	/* IRG's / block */
529 				* tenthsperirg	/* 0.1" / IRG " */
530 			) * (1.0 / tsize );	/* tape / 0.1" " */
531 		}
532 		etapes = fetapes;		/* truncating assignment */
533 		etapes++;
534 		/* count the dumped inodes map on each additional tape */
535 		tapesize += (etapes - 1) *
536 			(howmany(mapsize * sizeof(char), TP_BSIZE) + 1);
537 		tapesize += etapes + 10;	/* headers + 10 trailer blks */
538 		msg("estimated %ld tape blocks on %3.2f tape(s).\n",
539 		    tapesize, fetapes);
540 	}
541 
542         /*
543          * If the user only wants an estimate of the number of
544          * tapes, exit now.
545          */
546         if (just_estimate)
547                 exit(0);
548 
549 	/*
550 	 * Allocate tape buffer.
551 	 */
552 	if (!alloctape())
553 		quit(
554 	"can't allocate tape buffers - try a smaller blocking factor.\n");
555 
556 	startnewtape(1);
557 	(void)time((time_t *)&(tstart_writing));
558 	dumpmap(usedinomap, TS_CLRI, maxino - 1);
559 
560 	passno = 3;
561 	setproctitle("%s: pass 3: directories", disk);
562 	msg("dumping (Pass III) [directories]\n");
563 	dirty = 0;		/* XXX just to get gcc to shut up */
564 	for (map = dumpdirmap, ino = 1; ino < maxino; ino++) {
565 		if (((ino - 1) % CHAR_BIT) == 0)	/* map is offset by 1 */
566 			dirty = *map++;
567 		else
568 			dirty >>= 1;
569 		if ((dirty & 1) == 0)
570 			continue;
571 		/*
572 		 * Skip directory inodes deleted and maybe reallocated
573 		 */
574 		dp = getino(ino, &mode);
575 		if (mode != IFDIR)
576 			continue;
577 		(void)dumpino(dp, ino);
578 	}
579 
580 	passno = 4;
581 	setproctitle("%s: pass 4: regular files", disk);
582 	msg("dumping (Pass IV) [regular files]\n");
583 	for (map = dumpinomap, ino = 1; ino < maxino; ino++) {
584 		if (((ino - 1) % CHAR_BIT) == 0)	/* map is offset by 1 */
585 			dirty = *map++;
586 		else
587 			dirty >>= 1;
588 		if ((dirty & 1) == 0)
589 			continue;
590 		/*
591 		 * Skip inodes deleted and reallocated as directories.
592 		 */
593 		dp = getino(ino, &mode);
594 		if (mode == IFDIR)
595 			continue;
596 		(void)dumpino(dp, ino);
597 	}
598 
599 	(void)time((time_t *)&(tend_writing));
600 	spcl.c_type = TS_END;
601 	for (i = 0; i < ntrec; i++)
602 		writeheader(maxino - 1);
603 	if (pipeout)
604 		msg("DUMP: %jd tape blocks\n", (intmax_t)spcl.c_tapea);
605 	else
606 		msg("DUMP: %jd tape blocks on %d volume%s\n",
607 		    (intmax_t)spcl.c_tapea, spcl.c_volume,
608 		    (spcl.c_volume == 1) ? "" : "s");
609 
610 	/* report dump performance, avoid division through zero */
611 	if (tend_writing - tstart_writing == 0)
612 		msg("finished in less than a second\n");
613 	else
614 		msg("finished in %jd seconds, throughput %jd KBytes/sec\n",
615 		    (intmax_t)tend_writing - tstart_writing,
616 		    (intmax_t)(spcl.c_tapea /
617 		    (tend_writing - tstart_writing)));
618 
619 	putdumptime();
620 	trewind();
621 	broadcast("DUMP IS DONE!\a\a\n");
622 	msg("DUMP IS DONE\n");
623 	Exit(X_FINOK);
624 	/* NOTREACHED */
625 }
626 
627 static void
628 usage(void)
629 {
630 	fprintf(stderr,
631 		"usage: dump [-0123456789acLnSu] [-B records] [-b blocksize] [-C cachesize]\n"
632 		"            [-D dumpdates] [-d density] [-f file | -P pipecommand] [-h level]\n"
633 		"            [-s feet] [-T date] filesystem\n"
634 		"       dump -W | -w\n");
635 	exit(X_STARTUP);
636 }
637 
638 /*
639  * Check to see if a disk is currently mounted.
640  */
641 static char *
642 getmntpt(char *name, int *mntflagsp)
643 {
644 	long mntsize, i;
645 	struct statfs *mntbuf;
646 
647 	mntsize = getmntinfo(&mntbuf, MNT_NOWAIT);
648 	for (i = 0; i < mntsize; i++) {
649 		if (!strcmp(mntbuf[i].f_mntfromname, name)) {
650 			*mntflagsp = mntbuf[i].f_flags;
651 			return (mntbuf[i].f_mntonname);
652 		}
653 	}
654 	return (0);
655 }
656 
657 /*
658  * Pick up a numeric argument.  It must be nonnegative and in the given
659  * range (except that a vmax of 0 means unlimited).
660  */
661 static long
662 numarg(const char *meaning, long vmin, long vmax)
663 {
664 	char *p;
665 	long val;
666 
667 	val = strtol(optarg, &p, 10);
668 	if (*p)
669 		errx(1, "illegal %s -- %s", meaning, optarg);
670 	if (val < vmin || (vmax && val > vmax))
671 		errx(1, "%s must be between %ld and %ld", meaning, vmin, vmax);
672 	return (val);
673 }
674 
675 void
676 sig(int signo)
677 {
678 	switch(signo) {
679 	case SIGALRM:
680 	case SIGBUS:
681 	case SIGFPE:
682 	case SIGHUP:
683 	case SIGTERM:
684 	case SIGTRAP:
685 		if (pipeout)
686 			quit("Signal on pipe: cannot recover\n");
687 		msg("Rewriting attempted as response to unknown signal.\n");
688 		(void)fflush(stderr);
689 		(void)fflush(stdout);
690 		close_rewind();
691 		exit(X_REWRITE);
692 		/* NOTREACHED */
693 	case SIGSEGV:
694 		msg("SIGSEGV: ABORTING!\n");
695 		(void)signal(SIGSEGV, SIG_DFL);
696 		(void)kill(0, SIGSEGV);
697 		/* NOTREACHED */
698 	}
699 }
700 
701 char *
702 rawname(char *cp)
703 {
704 	struct stat sb;
705 
706 	/*
707 	 * Ensure that the device passed in is a raw device.
708 	 */
709 	if (stat(cp, &sb) == 0 && (sb.st_mode & S_IFMT) == S_IFCHR)
710 		return (cp);
711 
712 	/*
713 	 * Since there's only one device type now, we can't construct any
714 	 * better name, so we have to return NULL.
715 	 */
716 	return (NULL);
717 }
718 
719 /*
720  * obsolete --
721  *	Change set of key letters and ordered arguments into something
722  *	getopt(3) will like.
723  */
724 static void
725 obsolete(int *argcp, char **argvp[])
726 {
727 	int argc, flags;
728 	char *ap, **argv, *flagsp, **nargv, *p;
729 
730 	/* Setup. */
731 	argv = *argvp;
732 	argc = *argcp;
733 
734 	/*
735 	 * Return if no arguments or first argument has leading
736 	 * dash or slash.
737 	 */
738 	ap = argv[1];
739 	if (argc == 1 || *ap == '-' || *ap == '/')
740 		return;
741 
742 	/* Allocate space for new arguments. */
743 	if ((*argvp = nargv = malloc((argc + 1) * sizeof(char *))) == NULL ||
744 	    (p = flagsp = malloc(strlen(ap) + 2)) == NULL)
745 		err(1, NULL);
746 
747 	*nargv++ = *argv;
748 	argv += 2;
749 
750 	for (flags = 0; *ap; ++ap) {
751 		switch (*ap) {
752 		case 'B':
753 		case 'b':
754 		case 'd':
755 		case 'f':
756 		case 'D':
757 		case 'C':
758 		case 'h':
759 		case 's':
760 		case 'T':
761 			if (*argv == NULL) {
762 				warnx("option requires an argument -- %c", *ap);
763 				usage();
764 			}
765 			if ((nargv[0] = malloc(strlen(*argv) + 2 + 1)) == NULL)
766 				err(1, NULL);
767 			nargv[0][0] = '-';
768 			nargv[0][1] = *ap;
769 			(void)strcpy(&nargv[0][2], *argv);
770 			++argv;
771 			++nargv;
772 			break;
773 		default:
774 			if (!flags) {
775 				*p++ = '-';
776 				flags = 1;
777 			}
778 			*p++ = *ap;
779 			break;
780 		}
781 	}
782 
783 	/* Terminate flags. */
784 	if (flags) {
785 		*p = '\0';
786 		*nargv++ = flagsp;
787 	} else
788 		free(flagsp);
789 
790 	/* Copy remaining arguments. */
791 	while ((*nargv++ = *argv++));
792 
793 	/* Update argument count. */
794 	*argcp = nargv - *argvp - 1;
795 }
796