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[netbsd-mini2440.git] / sbin / dump / main.c
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1 /* $NetBSD: main.c,v 1.63 2006/10/26 20:02:30 hannken Exp $ */
2
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 #include <sys/cdefs.h>
33 #ifndef lint
34 __COPYRIGHT("@(#) Copyright (c) 1980, 1991, 1993, 1994\
35 The Regents of the University of California. All rights reserved.");
36 #endif /* not lint */
37
38 #ifndef lint
39 #if 0
40 static char sccsid[] = "@(#)main.c 8.6 (Berkeley) 5/1/95";
41 #else
42 __RCSID("$NetBSD: main.c,v 1.63 2006/10/26 20:02:30 hannken Exp $");
43 #endif
44 #endif /* not lint */
45
46 #include <sys/param.h>
47 #include <sys/time.h>
48 #include <sys/stat.h>
49 #include <sys/mount.h>
50
51 #include <ufs/ufs/dinode.h>
52 #include <ufs/ffs/fs.h>
53 #include <ufs/ffs/ffs_extern.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 <signal.h>
63 #include <stdio.h>
64 #include <stdlib.h>
65 #include <string.h>
66 #include <time.h>
67 #include <unistd.h>
68
69 #include "dump.h"
70 #include "pathnames.h"
71 #include "snapshot.h"
72
73 int timestamp; /* print message timestamps */
74 int notify; /* notify operator flag */
75 int blockswritten; /* number of blocks written on current tape */
76 int tapeno; /* current tape number */
77 int density; /* density in bytes/0.1" */
78 int ntrec = NTREC; /* # tape blocks in each tape record */
79 int cartridge; /* Assume non-cartridge tape */
80 long dev_bsize = 1; /* recalculated below */
81 long blocksperfile; /* output blocks per file */
82 const char *host; /* remote host (if any) */
83 int readcache = -1; /* read cache size (in readblksize blks) */
84 int readblksize = 32 * 1024; /* read block size */
85 char default_time_string[] = "%T %Z"; /* default timestamp string */
86 char *time_string = default_time_string; /* timestamp string */
87
88 int main(int, char *[]);
89 static long numarg(const char *, long, long);
90 static void obsolete(int *, char **[]);
91 static void usage(void);
92
93 int
94 main(int argc, char *argv[])
95 {
96 ino_t ino;
97 int dirty;
98 union dinode *dp;
99 struct fstab *dt;
100 struct statvfs *mntinfo, fsbuf;
101 char *map, *cp;
102 int ch;
103 int i, anydirskipped, bflag = 0, Tflag = 0, Fflag = 0, honorlevel = 1;
104 int snap_internal = 0;
105 ino_t maxino;
106 time_t tnow, date;
107 int dirc;
108 char *mountpoint;
109 int just_estimate = 0;
110 char labelstr[LBLSIZE];
111 char *new_time_format;
112 char *snap_backup = NULL;
113
114 spcl.c_date = 0;
115 (void)time(&tnow);
116 spcl.c_date = tnow;
117 tzset(); /* set up timezone for strftime */
118 if ((new_time_format = getenv("TIMEFORMAT")) != NULL)
119 time_string = new_time_format;
120
121 tsize = 0; /* Default later, based on 'c' option for cart tapes */
122 if ((tape = getenv("TAPE")) == NULL)
123 tape = _PATH_DEFTAPE;
124 dumpdates = _PATH_DUMPDATES;
125 temp = _PATH_DTMP;
126 strcpy(labelstr, "none"); /* XXX safe strcpy. */
127 if (TP_BSIZE / DEV_BSIZE == 0 || TP_BSIZE % DEV_BSIZE != 0)
128 quit("TP_BSIZE must be a multiple of DEV_BSIZE\n");
129 level = '0';
130 timestamp = 0;
131
132 if (argc < 2)
133 usage();
134
135 obsolete(&argc, &argv);
136 while ((ch = getopt(argc, argv,
137 "0123456789aB:b:cd:eFf:h:k:l:L:nr:s:StT:uWwx:X")) != -1)
138 switch (ch) {
139 /* dump level */
140 case '0': case '1': case '2': case '3': case '4':
141 case '5': case '6': case '7': case '8': case '9':
142 level = ch;
143 break;
144
145 case 'a': /* `auto-size', Write to EOM. */
146 unlimited = 1;
147 break;
148
149 case 'B': /* blocks per output file */
150 blocksperfile = numarg("blocks per file", 1L, 0L);
151 break;
152
153 case 'b': /* blocks per tape write */
154 ntrec = numarg("blocks per write", 1L, 1000L);
155 bflag = 1;
156 break;
157
158 case 'c': /* Tape is cart. not 9-track */
159 cartridge = 1;
160 break;
161
162 case 'd': /* density, in bits per inch */
163 density = numarg("density", 10L, 327670L) / 10;
164 if (density >= 625 && !bflag)
165 ntrec = HIGHDENSITYTREC;
166 break;
167
168 case 'e': /* eject full tapes */
169 eflag = 1;
170 break;
171
172 case 'F': /* files-to-dump is an fs image */
173 Fflag = 1;
174 break;
175
176 case 'f': /* output file */
177 tape = optarg;
178 break;
179
180 case 'h':
181 honorlevel = numarg("honor level", 0L, 10L);
182 break;
183
184 case 'k':
185 readblksize = numarg("read block size", 0, 64) * 1024;
186 break;
187
188 case 'l': /* autoload after eject full tapes */
189 eflag = 1;
190 lflag = numarg("timeout (in seconds)", 1, 0);
191 break;
192
193 case 'L':
194 /*
195 * Note that although there are LBLSIZE characters,
196 * the last must be '\0', so the limit on strlen()
197 * is really LBLSIZE-1.
198 */
199 if (strlcpy(labelstr, optarg, sizeof(labelstr))
200 >= sizeof(labelstr)) {
201 msg(
202 "WARNING Label `%s' is larger than limit of %lu characters.\n",
203 optarg,
204 (unsigned long)sizeof(labelstr) - 1);
205 msg("WARNING: Using truncated label `%s'.\n",
206 labelstr);
207 }
208 break;
209 case 'n': /* notify operators */
210 notify = 1;
211 break;
212
213 case 'r': /* read cache size */
214 readcache = numarg("read cache size", 0, 512);
215 break;
216
217 case 's': /* tape size, feet */
218 tsize = numarg("tape size", 1L, 0L) * 12 * 10;
219 break;
220
221 case 'S': /* exit after estimating # of tapes */
222 just_estimate = 1;
223 break;
224
225 case 't':
226 timestamp = 1;
227 break;
228
229 case 'T': /* time of last dump */
230 spcl.c_ddate = unctime(optarg);
231 if (spcl.c_ddate < 0) {
232 (void)fprintf(stderr, "bad time \"%s\"\n",
233 optarg);
234 exit(X_STARTUP);
235 }
236 Tflag = 1;
237 lastlevel = '?';
238 break;
239
240 case 'u': /* update /etc/dumpdates */
241 uflag = 1;
242 break;
243
244 case 'W': /* what to do */
245 case 'w':
246 lastdump(ch);
247 exit(X_FINOK); /* do nothing else */
248
249 case 'x':
250 snap_backup = optarg;
251 break;
252
253 case 'X':
254 snap_internal = 1;
255 break;
256
257 default:
258 usage();
259 }
260 argc -= optind;
261 argv += optind;
262
263 if (argc < 1) {
264 (void)fprintf(stderr,
265 "Must specify disk or image, or file list\n");
266 exit(X_STARTUP);
267 }
268
269
270 /*
271 * determine if disk is a subdirectory, and setup appropriately
272 */
273 getfstab(); /* /etc/fstab snarfed */
274 disk = NULL;
275 disk_dev = NULL;
276 mountpoint = NULL;
277 dirc = 0;
278 for (i = 0; i < argc; i++) {
279 struct stat sb;
280
281 if (lstat(argv[i], &sb) == -1)
282 quit("Cannot stat %s: %s\n", argv[i], strerror(errno));
283 if (Fflag || S_ISCHR(sb.st_mode) || S_ISBLK(sb.st_mode)) {
284 disk = argv[i];
285 multicheck:
286 if (dirc != 0)
287 quit(
288 "Can't dump a disk or image at the same time as a file list\n");
289 break;
290 }
291 if ((dt = fstabsearch(argv[i])) != NULL) {
292 disk = dt->fs_spec;
293 mountpoint = xstrdup(dt->fs_file);
294 goto multicheck;
295 }
296 if (statvfs(argv[i], &fsbuf) == -1)
297 quit("Cannot statvfs %s: %s\n", argv[i],
298 strerror(errno));
299 disk = fsbuf.f_mntfromname;
300 if (strcmp(argv[i], fsbuf.f_mntonname) == 0)
301 goto multicheck;
302 if (mountpoint == NULL) {
303 mountpoint = xstrdup(fsbuf.f_mntonname);
304 if (uflag) {
305 msg("Ignoring u flag for subdir dump\n");
306 uflag = 0;
307 }
308 if (level > '0') {
309 msg("Subdir dump is done at level 0\n");
310 level = '0';
311 }
312 msg("Dumping sub files/directories from %s\n",
313 mountpoint);
314 } else {
315 if (strcmp(mountpoint, fsbuf.f_mntonname) != 0)
316 quit("%s is not on %s\n", argv[i], mountpoint);
317 }
318 msg("Dumping file/directory %s\n", argv[i]);
319 dirc++;
320 }
321 if (mountpoint)
322 free(mountpoint);
323
324 if (dirc == 0) {
325 argv++;
326 if (argc != 1) {
327 (void)fprintf(stderr, "Excess arguments to dump:");
328 while (--argc)
329 (void)fprintf(stderr, " %s", *argv++);
330 (void)fprintf(stderr, "\n");
331 exit(X_STARTUP);
332 }
333 }
334 if (Tflag && uflag) {
335 (void)fprintf(stderr,
336 "You cannot use the T and u flags together.\n");
337 exit(X_STARTUP);
338 }
339 if (strcmp(tape, "-") == 0) {
340 pipeout++;
341 tape = "standard output";
342 }
343
344 if (blocksperfile)
345 blocksperfile = blocksperfile / ntrec * ntrec; /* round down */
346 else if (!unlimited) {
347 /*
348 * Determine how to default tape size and density
349 *
350 * density tape size
351 * 9-track 1600 bpi (160 bytes/.1") 2300 ft.
352 * 9-track 6250 bpi (625 bytes/.1") 2300 ft.
353 * cartridge 8000 bpi (100 bytes/.1") 1700 ft.
354 * (450*4 - slop)
355 */
356 if (density == 0)
357 density = cartridge ? 100 : 160;
358 if (tsize == 0)
359 tsize = cartridge ? 1700L*120L : 2300L*120L;
360 }
361
362 if ((cp = strchr(tape, ':')) != NULL) {
363 host = tape;
364 /* This is fine, because all the const strings don't have : */
365 *cp++ = '\0';
366 tape = cp;
367 #ifdef RDUMP
368 if (rmthost(host) == 0)
369 exit(X_STARTUP);
370 #else
371 (void)fprintf(stderr, "remote dump not enabled\n");
372 exit(X_STARTUP);
373 #endif
374 }
375
376 if (signal(SIGHUP, SIG_IGN) != SIG_IGN)
377 signal(SIGHUP, sig);
378 if (signal(SIGTRAP, SIG_IGN) != SIG_IGN)
379 signal(SIGTRAP, sig);
380 if (signal(SIGFPE, SIG_IGN) != SIG_IGN)
381 signal(SIGFPE, sig);
382 if (signal(SIGBUS, SIG_IGN) != SIG_IGN)
383 signal(SIGBUS, sig);
384 #if 0
385 if (signal(SIGSEGV, SIG_IGN) != SIG_IGN)
386 signal(SIGSEGV, sig);
387 #endif
388 if (signal(SIGTERM, SIG_IGN) != SIG_IGN)
389 signal(SIGTERM, sig);
390 if (signal(SIGINT, interrupt) == SIG_IGN)
391 signal(SIGINT, SIG_IGN);
392
393 /*
394 * disk can be either the full special file name, or
395 * the file system name.
396 */
397 mountpoint = NULL;
398 mntinfo = mntinfosearch(disk);
399 if ((dt = fstabsearch(disk)) != NULL) {
400 disk = rawname(dt->fs_spec);
401 mountpoint = dt->fs_file;
402 msg("Found %s on %s in %s\n", disk, mountpoint, _PATH_FSTAB);
403 } else if (mntinfo != NULL) {
404 disk = rawname(mntinfo->f_mntfromname);
405 mountpoint = mntinfo->f_mntonname;
406 msg("Found %s on %s in mount table\n", disk, mountpoint);
407 }
408 if (mountpoint != NULL) {
409 if (dirc != 0)
410 (void)snprintf(spcl.c_filesys, sizeof(spcl.c_filesys),
411 "a subset of %s", mountpoint);
412 else
413 (void)strlcpy(spcl.c_filesys, mountpoint,
414 sizeof(spcl.c_filesys));
415 } else if (Fflag) {
416 (void)strlcpy(spcl.c_filesys, "a file system image",
417 sizeof(spcl.c_filesys));
418 } else {
419 (void)strlcpy(spcl.c_filesys, "an unlisted file system",
420 sizeof(spcl.c_filesys));
421 }
422 (void)strlcpy(spcl.c_dev, disk, sizeof(spcl.c_dev));
423 (void)strlcpy(spcl.c_label, labelstr, sizeof(spcl.c_label));
424 (void)gethostname(spcl.c_host, sizeof(spcl.c_host));
425 spcl.c_host[sizeof(spcl.c_host) - 1] = '\0';
426
427 if ((snap_backup != NULL || snap_internal) && mntinfo == NULL) {
428 msg("WARNING: Cannot use -x or -X on unmounted file system.\n");
429 snap_backup = NULL;
430 snap_internal = 0;
431 }
432
433 #ifdef DUMP_LFS
434 sync();
435 if (snap_backup != NULL || snap_internal) {
436 if (lfs_wrap_stop(mountpoint) < 0) {
437 msg("Cannot stop writing on %s\n", mountpoint);
438 exit(X_STARTUP);
439 }
440 }
441 if ((diskfd = open(disk, O_RDONLY)) < 0) {
442 msg("Cannot open %s\n", disk);
443 exit(X_STARTUP);
444 }
445 disk_dev = disk;
446 #else /* ! DUMP_LFS */
447 if (snap_backup != NULL || snap_internal) {
448 diskfd = snap_open(mntinfo->f_mntonname, snap_backup,
449 &tnow, &disk_dev);
450 if (diskfd < 0) {
451 msg("Cannot open snapshot of %s\n",
452 mntinfo->f_mntonname);
453 exit(X_STARTUP);
454 }
455 spcl.c_date = tnow;
456 } else {
457 if ((diskfd = open(disk, O_RDONLY)) < 0) {
458 msg("Cannot open %s\n", disk);
459 exit(X_STARTUP);
460 }
461 disk_dev = disk;
462 }
463 sync();
464 #endif /* ! DUMP_LFS */
465
466 needswap = fs_read_sblock(sblock_buf);
467
468 spcl.c_level = iswap32(level - '0');
469 spcl.c_type = iswap32(TS_TAPE);
470 spcl.c_date = iswap32(spcl.c_date);
471 spcl.c_ddate = iswap32(spcl.c_ddate);
472 if (!Tflag)
473 getdumptime(); /* /etc/dumpdates snarfed */
474
475 date = iswap32(spcl.c_date);
476 msg("Date of this level %c dump: %s", level,
477 spcl.c_date == 0 ? "the epoch\n" : ctime(&date));
478 date = iswap32(spcl.c_ddate);
479 msg("Date of last level %c dump: %s", lastlevel,
480 spcl.c_ddate == 0 ? "the epoch\n" : ctime(&date));
481 msg("Dumping ");
482 if (snap_backup != NULL || snap_internal)
483 msgtail("a snapshot of ");
484 if (dirc != 0)
485 msgtail("a subset of ");
486 msgtail("%s (%s) ", disk, spcl.c_filesys);
487 if (host)
488 msgtail("to %s on host %s\n", tape, host);
489 else
490 msgtail("to %s\n", tape);
491 msg("Label: %s\n", labelstr);
492
493 ufsib = fs_parametrize();
494
495 dev_bshift = ffs(dev_bsize) - 1;
496 if (dev_bsize != (1 << dev_bshift))
497 quit("dev_bsize (%ld) is not a power of 2", dev_bsize);
498 tp_bshift = ffs(TP_BSIZE) - 1;
499 if (TP_BSIZE != (1 << tp_bshift))
500 quit("TP_BSIZE (%d) is not a power of 2", TP_BSIZE);
501 maxino = fs_maxino();
502 mapsize = roundup(howmany(maxino, NBBY), TP_BSIZE);
503 usedinomap = (char *)xcalloc((unsigned) mapsize, sizeof(char));
504 dumpdirmap = (char *)xcalloc((unsigned) mapsize, sizeof(char));
505 dumpinomap = (char *)xcalloc((unsigned) mapsize, sizeof(char));
506 tapesize = 3 * (howmany(mapsize * sizeof(char), TP_BSIZE) + 1);
507
508 nonodump = iswap32(spcl.c_level) < honorlevel;
509
510 initcache(readcache, readblksize);
511
512 (void)signal(SIGINFO, statussig);
513
514 msg("mapping (Pass I) [regular files]\n");
515 anydirskipped = mapfiles(maxino, &tapesize, mountpoint,
516 (dirc ? argv : NULL));
517
518 msg("mapping (Pass II) [directories]\n");
519 while (anydirskipped) {
520 anydirskipped = mapdirs(maxino, &tapesize);
521 }
522
523 if (pipeout || unlimited) {
524 tapesize += 10; /* 10 trailer blocks */
525 msg("estimated %llu tape blocks.\n",
526 (unsigned long long)tapesize);
527 } else {
528 double fetapes;
529
530 if (blocksperfile)
531 fetapes = (double) tapesize / blocksperfile;
532 else if (cartridge) {
533 /* Estimate number of tapes, assuming streaming stops at
534 the end of each block written, and not in mid-block.
535 Assume no erroneous blocks; this can be compensated
536 for with an artificially low tape size. */
537 fetapes =
538 ( (double) tapesize /* blocks */
539 * TP_BSIZE /* bytes/block */
540 * (1.0/density) /* 0.1" / byte */
541 +
542 (double) tapesize /* blocks */
543 * (1.0/ntrec) /* streaming-stops per block */
544 * 15.48 /* 0.1" / streaming-stop */
545 ) * (1.0 / tsize ); /* tape / 0.1" */
546 } else {
547 /* Estimate number of tapes, for old fashioned 9-track
548 tape */
549 int tenthsperirg = (density == 625) ? 3 : 7;
550 fetapes =
551 ( tapesize /* blocks */
552 * TP_BSIZE /* bytes / block */
553 * (1.0/density) /* 0.1" / byte */
554 +
555 tapesize /* blocks */
556 * (1.0/ntrec) /* IRG's / block */
557 * tenthsperirg /* 0.1" / IRG */
558 ) * (1.0 / tsize ); /* tape / 0.1" */
559 }
560 etapes = fetapes; /* truncating assignment */
561 etapes++;
562 /* count the dumped inodes map on each additional tape */
563 tapesize += (etapes - 1) *
564 (howmany(mapsize * sizeof(char), TP_BSIZE) + 1);
565 tapesize += etapes + 10; /* headers + 10 trailer blks */
566 msg("estimated %llu tape blocks on %3.2f tape(s).\n",
567 (unsigned long long)tapesize, fetapes);
568 }
569 /*
570 * If the user only wants an estimate of the number of
571 * tapes, exit now.
572 */
573 if (just_estimate)
574 exit(X_FINOK);
575
576 /*
577 * Allocate tape buffer.
578 */
579 if (!alloctape())
580 quit("can't allocate tape buffers - try a smaller blocking factor.\n");
581
582 startnewtape(1);
583 (void)time((time_t *)&(tstart_writing));
584 xferrate = 0;
585 dumpmap(usedinomap, TS_CLRI, maxino - 1);
586
587 msg("dumping (Pass III) [directories]\n");
588 dirty = 0; /* XXX just to get gcc to shut up */
589 for (map = dumpdirmap, ino = 1; ino < maxino; ino++) {
590 if (((ino - 1) % NBBY) == 0) /* map is offset by 1 */
591 dirty = *map++;
592 else
593 dirty >>= 1;
594 if ((dirty & 1) == 0)
595 continue;
596 /*
597 * Skip directory inodes deleted and maybe reallocated
598 */
599 dp = getino(ino);
600 if ((DIP(dp, mode) & IFMT) != IFDIR)
601 continue;
602 (void)dumpino(dp, ino);
603 }
604
605 msg("dumping (Pass IV) [regular files]\n");
606 for (map = dumpinomap, ino = 1; ino < maxino; ino++) {
607 int mode;
608
609 if (((ino - 1) % NBBY) == 0) /* map is offset by 1 */
610 dirty = *map++;
611 else
612 dirty >>= 1;
613 if ((dirty & 1) == 0)
614 continue;
615 /*
616 * Skip inodes deleted and reallocated as directories.
617 */
618 dp = getino(ino);
619 mode = DIP(dp, mode) & IFMT;
620 if (mode == IFDIR)
621 continue;
622 (void)dumpino(dp, ino);
623 }
624
625 spcl.c_type = iswap32(TS_END);
626 for (i = 0; i < ntrec; i++)
627 writeheader(maxino - 1);
628 if (pipeout)
629 msg("%d tape blocks\n",iswap32(spcl.c_tapea));
630 else
631 msg("%d tape blocks on %d volume%s\n",
632 iswap32(spcl.c_tapea), iswap32(spcl.c_volume),
633 (iswap32(spcl.c_volume) == 1) ? "" : "s");
634 tnow = do_stats();
635 date = iswap32(spcl.c_date);
636 msg("Date of this level %c dump: %s", level,
637 spcl.c_date == 0 ? "the epoch\n" : ctime(&date));
638 msg("Date this dump completed: %s", ctime(&tnow));
639 msg("Average transfer rate: %d KB/s\n", xferrate / tapeno);
640 putdumptime();
641 trewind(0);
642 broadcast("DUMP IS DONE!\a\a\n");
643 #ifdef DUMP_LFS
644 lfs_wrap_go();
645 #endif /* DUMP_LFS */
646 msg("DUMP IS DONE\n");
647 Exit(X_FINOK);
648 /* NOTREACHED */
649 exit(X_FINOK); /* XXX: to satisfy gcc */
650 }
651
652 static void
653 usage(void)
654 {
655 const char *prog = getprogname();
656
657 (void)fprintf(stderr,
658 "usage: %s [-0123456789aceFnStuX] [-B records] [-b blocksize]\n"
659 " [-d density] [-f file] [-h level] [-k read-blocksize]\n"
660 " [-L label] [-l timeout] [-r read-cache] [-s feet]\n"
661 " [-T date] [-x snap-backup] files-to-dump\n"
662 " %s [-W | -w]\n", prog, prog);
663 exit(X_STARTUP);
664 }
665
666 /*
667 * Pick up a numeric argument. It must be nonnegative and in the given
668 * range (except that a vmax of 0 means unlimited).
669 */
670 static long
671 numarg(const char *meaning, long vmin, long vmax)
672 {
673 char *p;
674 long val;
675
676 val = strtol(optarg, &p, 10);
677 if (*p)
678 errx(X_STARTUP, "illegal %s -- %s", meaning, optarg);
679 if (val < vmin || (vmax && val > vmax))
680 errx(X_STARTUP, "%s must be between %ld and %ld",
681 meaning, vmin, vmax);
682 return (val);
683 }
684
685 void
686 sig(int signo)
687 {
688
689 switch(signo) {
690 case SIGALRM:
691 case SIGBUS:
692 case SIGFPE:
693 case SIGHUP:
694 case SIGTERM:
695 case SIGTRAP:
696 if (pipeout)
697 quit("Signal on pipe: cannot recover\n");
698 msg("Rewriting attempted as response to signal %s.\n", sys_siglist[signo]);
699 (void)fflush(stderr);
700 (void)fflush(stdout);
701 close_rewind();
702 exit(X_REWRITE);
703 /* NOTREACHED */
704 case SIGSEGV:
705 msg("SIGSEGV: ABORTING!\n");
706 (void)signal(SIGSEGV, SIG_DFL);
707 (void)kill(0, SIGSEGV);
708 /* NOTREACHED */
709 }
710 }
711
712 char *
713 rawname(char *cp)
714 {
715 static char rawbuf[MAXPATHLEN];
716 char *dp = strrchr(cp, '/');
717
718 if (dp == NULL)
719 return (NULL);
720 *dp = '\0';
721 (void)snprintf(rawbuf, sizeof rawbuf, "%s/r%s", cp, dp + 1);
722 *dp = '/';
723 return (rawbuf);
724 }
725
726 /*
727 * obsolete --
728 * Change set of key letters and ordered arguments into something
729 * getopt(3) will like.
730 */
731 static void
732 obsolete(int *argcp, char **argvp[])
733 {
734 int argc, flags;
735 char *ap, **argv, *flagsp, **nargv, *p;
736
737 /* Setup. */
738 argv = *argvp;
739 argc = *argcp;
740
741 /* Return if no arguments or first argument has leading dash. */
742 ap = argv[1];
743 if (argc == 1 || *ap == '-')
744 return;
745
746 /* Allocate space for new arguments. */
747 *argvp = nargv = xmalloc((argc + 1) * sizeof(char *));
748 p = flagsp = xmalloc(strlen(ap) + 2);
749
750 *nargv++ = *argv;
751 argv += 2;
752
753 for (flags = 0; *ap; ++ap) {
754 switch (*ap) {
755 case 'B':
756 case 'b':
757 case 'd':
758 case 'f':
759 case 'h':
760 case 's':
761 case 'T':
762 case 'x':
763 if (*argv == NULL) {
764 warnx("option requires an argument -- %c", *ap);
765 usage();
766 }
767 nargv[0] = xmalloc(strlen(*argv) + 2 + 1);
768 nargv[0][0] = '-';
769 nargv[0][1] = *ap;
770 (void)strcpy(&nargv[0][2], *argv); /* XXX safe strcpy */
771 ++argv;
772 ++nargv;
773 break;
774 default:
775 if (!flags) {
776 *p++ = '-';
777 flags = 1;
778 }
779 *p++ = *ap;
780 break;
781 }
782 }
783
784 /* Terminate flags. */
785 if (flags) {
786 *p = '\0';
787 *nargv++ = flagsp;
788 } else
789 free(flagsp);
790
791 /* Copy remaining arguments. */
792 while ((*nargv++ = *argv++) != NULL)
793 ;
794
795 /* Update argument count. */
796 *argcp = nargv - *argvp - 1;
797 }
798
799
800 void *
801 xcalloc(size_t number, size_t size)
802 {
803 void *p;
804
805 p = calloc(number, size);
806 if (p == NULL)
807 quit("%s\n", strerror(errno));
808 return (p);
809 }
810
811 void *
812 xmalloc(size_t size)
813 {
814 void *p;
815
816 p = malloc(size);
817 if (p == NULL)
818 quit("%s\n", strerror(errno));
819 return (p);
820 }
821
822 char *
823 xstrdup(const char *str)
824 {
825 char *p;
826
827 p = strdup(str);
828 if (p == NULL)
829 quit("%s\n", strerror(errno));
830 return (p);
831 }
NetBSD on the FriendlyARM MINI2440