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Dump accepts ext3 filesystems. Checking the superblock features.
[dump.git] / dump / main.c
1 /*
2 * Ported to Linux's Second Extended File System as part of the
3 * dump and restore backup suit
4 * Remy Card <card@Linux.EU.Org>, 1994-1997
5 * Stelian Pop <pop@cybercable.fr>, 1999
6 */
7
8 /*-
9 * Copyright (c) 1980, 1991, 1993, 1994
10 * The Regents of the University of California. All rights reserved.
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 * 1. Redistributions of source code must retain the above copyright
16 * notice, this list of conditions and the following disclaimer.
17 * 2. Redistributions in binary form must reproduce the above copyright
18 * notice, this list of conditions and the following disclaimer in the
19 * documentation and/or other materials provided with the distribution.
20 * 3. All advertising materials mentioning features or use of this software
21 * must display the following acknowledgement:
22 * This product includes software developed by the University of
23 * California, Berkeley and its contributors.
24 * 4. Neither the name of the University nor the names of its contributors
25 * may be used to endorse or promote products derived from this software
26 * without specific prior written permission.
27 *
28 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
29 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
30 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
31 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
32 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
33 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
34 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
35 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
36 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
37 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
38 * SUCH DAMAGE.
39 */
40
41 #ifndef lint
42 static const char rcsid[] =
43 "$Id: main.c,v 1.7 1999/11/21 02:24:47 tiniou Exp $";
44 #endif /* not lint */
45
46 #include <sys/param.h>
47 #include <sys/time.h>
48 #ifdef __linux__
49 #include <linux/ext2_fs.h>
50 #include <sys/stat.h>
51 #include <bsdcompat.h>
52 #else
53 #ifdef sunos
54 #include <sys/vnode.h>
55
56 #include <ufs/inode.h>
57 #include <ufs/fs.h>
58 #else
59 #include <ufs/ufs/dinode.h>
60 #include <ufs/ffs/fs.h>
61 #endif
62 #endif
63
64 #include <protocols/dumprestore.h>
65
66 #include <ctype.h>
67 #include <compaterr.h>
68 #include <fcntl.h>
69 #include <fstab.h>
70 #include <signal.h>
71 #include <stdio.h>
72 #include <stdlib.h>
73 #include <string.h>
74 #include <unistd.h>
75
76 #ifdef __linux__
77 #include <ext2fs/ext2fs.h>
78 #endif
79
80 #include "dump.h"
81 #include "pathnames.h"
82
83 #ifndef SBOFF
84 #define SBOFF (SBLOCK * DEV_BSIZE)
85 #endif
86
87 int notify = 0; /* notify operator flag */
88 int blockswritten = 0; /* number of blocks written on current tape */
89 int tapeno = 0; /* current tape number */
90 int density = 0; /* density in bytes/0.1" " <- this is for hilit19 */
91 int ntrec = NTREC; /* # tape blocks in each tape record */
92 int cartridge = 0; /* Assume non-cartridge tape */
93 int dokerberos = 0; /* Use Kerberos authentication */
94 long dev_bsize = 1; /* recalculated below */
95 long blocksperfile; /* output blocks per file */
96 char *host = NULL; /* remote host (if any) */
97
98 #ifdef __linux__
99 char *__progname;
100 #endif
101
102 int maxbsize = 64*1024; /* XXX MAXBSIZE from sys/param.h */
103 static long numarg __P((const char *, long, long));
104 static void obsolete __P((int *, char **[]));
105 static void usage __P((void));
106
107 int
108 main(int argc, char *argv[])
109 {
110 register ino_t ino;
111 register int dirty;
112 register struct dinode *dp;
113 register struct fstab *dt;
114 register char *map;
115 register int ch;
116 int i, anydirskipped, bflag = 0, Tflag = 0, honorlevel = 1;
117 ino_t maxino;
118 #ifdef __linux__
119 errcode_t retval;
120 char directory[NAME_MAX];
121 char pathname[NAME_MAX];
122 #endif
123 time_t tnow;
124 char labelstr[LBLSIZE];
125
126 spcl.c_date = 0;
127 #ifdef __linux__
128 (void)time4(&spcl.c_date);
129 #else
130 (void)time((time_t *)&spcl.c_date);
131 #endif
132
133 #ifdef __linux__
134 __progname = argv[0];
135 directory[0] = 0;
136 initialize_ext2_error_table();
137 #endif
138
139 tsize = 0; /* Default later, based on 'c' option for cart tapes */
140 if ((tape = getenv("TAPE")) == NULL)
141 tape = _PATH_DEFTAPE;
142 dumpdates = _PATH_DUMPDATES;
143 temp = _PATH_DTMP;
144 strcpy(labelstr, "none"); /* XXX safe strcpy. */
145 if (TP_BSIZE / DEV_BSIZE == 0 || TP_BSIZE % DEV_BSIZE != 0)
146 quit("TP_BSIZE must be a multiple of DEV_BSIZE\n");
147 level = '0';
148
149 if (argc < 2)
150 usage();
151
152 obsolete(&argc, &argv);
153 #ifdef KERBEROS
154 #define optstring "0123456789aB:b:cd:f:h:kL:ns:T:uWw"
155 #else
156 #define optstring "0123456789aB:b:cd:f:h:L:ns:T:uWw"
157 #endif
158 while ((ch = getopt(argc, argv, optstring)) != -1)
159 #undef optstring
160 switch (ch) {
161 /* dump level */
162 case '0': case '1': case '2': case '3': case '4':
163 case '5': case '6': case '7': case '8': case '9':
164 level = ch;
165 break;
166
167 case 'a': /* `auto-size', Write to EOM. */
168 unlimited = 1;
169 break;
170
171 case 'B': /* blocks per output file */
172 blocksperfile = numarg("number of blocks per file",
173 1L, 0L);
174 break;
175
176 case 'b': /* blocks per tape write */
177 ntrec = numarg("number of blocks per write",
178 1L, 1000L);
179 if (ntrec > maxbsize/1024) {
180 msg("Please choose a blocksize <= %dKB\n",
181 maxbsize/1024);
182 exit(X_STARTUP);
183 }
184 bflag = 1;
185 break;
186
187 case 'c': /* Tape is cart. not 9-track */
188 cartridge = 1;
189 break;
190
191 case 'd': /* density, in bits per inch */
192 density = numarg("density", 10L, 327670L) / 10;
193 if (density >= 625 && !bflag)
194 ntrec = HIGHDENSITYTREC;
195 break;
196
197 case 'f': /* output file */
198 tape = optarg;
199 break;
200
201 case 'h':
202 honorlevel = numarg("honor level", 0L, 10L);
203 break;
204
205 #ifdef KERBEROS
206 case 'k':
207 dokerberos = 1;
208 break;
209 #endif
210
211 case 'L':
212 /*
213 * Note that although there are LBLSIZE characters,
214 * the last must be '\0', so the limit on strlen()
215 * is really LBLSIZE-1.
216 */
217 strncpy(labelstr, optarg, LBLSIZE);
218 labelstr[LBLSIZE-1] = '\0';
219 if (strlen(optarg) > LBLSIZE-1) {
220 msg(
221 "WARNING Label `%s' is larger than limit of %d characters.\n",
222 optarg, LBLSIZE-1);
223 msg("WARNING: Using truncated label `%s'.\n",
224 labelstr);
225 }
226 break;
227
228 case 'n': /* notify operators */
229 notify = 1;
230 break;
231
232 case 's': /* tape size, feet */
233 tsize = numarg("tape size", 1L, 0L) * 12 * 10;
234 break;
235
236 case 'T': /* time of last dump */
237 spcl.c_ddate = unctime(optarg);
238 if (spcl.c_ddate < 0) {
239 (void)fprintf(stderr, "bad time \"%s\"\n",
240 optarg);
241 exit(X_STARTUP);
242 }
243 Tflag = 1;
244 lastlevel = '?';
245 break;
246
247 case 'u': /* update dumpdates */
248 uflag = 1;
249 break;
250
251 case 'W': /* what to do */
252 case 'w':
253 lastdump(ch);
254 exit(X_FINOK); /* do nothing else */
255
256 default:
257 usage();
258 }
259 argc -= optind;
260 argv += optind;
261
262 if (argc < 1) {
263 (void)fprintf(stderr, "Must specify disk or filesystem\n");
264 exit(X_STARTUP);
265 }
266 disk = *argv++;
267 argc--;
268 if (argc >= 1) {
269 (void)fprintf(stderr, "Unknown arguments to dump:");
270 while (argc--)
271 (void)fprintf(stderr, " %s", *argv++);
272 (void)fprintf(stderr, "\n");
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 (strcmp(tape, "-") == 0) {
281 pipeout++;
282 tape = "standard output";
283 }
284
285 if (blocksperfile)
286 blocksperfile = blocksperfile / ntrec * ntrec; /* round down */
287 else if (!unlimited) {
288 /*
289 * Determine how to default tape size and density
290 *
291 * density tape size
292 * 9-track 1600 bpi (160 bytes/.1") 2300 ft.
293 * 9-track 6250 bpi (625 bytes/.1") 2300 ft.
294 * cartridge 8000 bpi (100 bytes/.1") 1700 ft.
295 * (450*4 - slop)
296 * hilit19 hits again: "
297 */
298 if (density == 0)
299 density = cartridge ? 100 : 160;
300 if (tsize == 0)
301 tsize = cartridge ? 1700L*120L : 2300L*120L;
302 }
303
304 if (strchr(tape, ':')) {
305 host = tape;
306 tape = strchr(host, ':');
307 *tape++ = '\0';
308 #ifdef RDUMP
309 if (index(tape, '\n')) {
310 (void)fprintf(stderr, "invalid characters in tape\n");
311 exit(X_STARTUP);
312 }
313 if (rmthost(host) == 0)
314 exit(X_STARTUP);
315 #else
316 (void)fprintf(stderr, "remote dump not enabled\n");
317 exit(X_STARTUP);
318 #endif
319 }
320 (void)setuid(getuid()); /* rmthost() is the only reason to be setuid */
321
322 if (signal(SIGHUP, SIG_IGN) != SIG_IGN)
323 signal(SIGHUP, sig);
324 if (signal(SIGTRAP, SIG_IGN) != SIG_IGN)
325 signal(SIGTRAP, sig);
326 if (signal(SIGFPE, SIG_IGN) != SIG_IGN)
327 signal(SIGFPE, sig);
328 if (signal(SIGBUS, SIG_IGN) != SIG_IGN)
329 signal(SIGBUS, sig);
330 if (signal(SIGSEGV, SIG_IGN) != SIG_IGN)
331 signal(SIGSEGV, sig);
332 if (signal(SIGTERM, SIG_IGN) != SIG_IGN)
333 signal(SIGTERM, sig);
334 if (signal(SIGINT, interrupt) == SIG_IGN)
335 signal(SIGINT, SIG_IGN);
336 set_operators(); /* /etc/group snarfed */
337 getfstab(); /* /etc/fstab snarfed */
338 /*
339 * disk can be either the full special file name,
340 * the suffix of the special file name,
341 * the special name missing the leading '/',
342 * the file system name with or without the leading '/'.
343 */
344 if ((dt = fstabsearch(disk)) != NULL) {
345 disk = rawname(dt->fs_spec);
346 (void)strncpy(spcl.c_dev, dt->fs_spec, NAMELEN);
347 (void)strncpy(spcl.c_filesys, dt->fs_file, NAMELEN);
348 #ifdef __linux__
349 } else {
350 /*
351 * The argument was not found in the fstab
352 * assume that this is a subtree and search for it
353 */
354 #ifdef HAVE_REALPATH
355 if (realpath(disk, pathname) == NULL)
356 #endif
357 strcpy(pathname, disk);
358 dt = fstabsearchdir(pathname, directory);
359 if (dt != NULL) {
360 char name[MAXPATHLEN];
361 (void)sprintf(name, "%s (dir %s)",
362 dt->fs_spec, directory);
363 (void)strncpy(spcl.c_dev, name, NAMELEN);
364 (void)strncpy(spcl.c_filesys, dt->fs_file, NAMELEN);
365 disk = rawname(dt->fs_spec);
366 } else {
367 (void)strncpy(spcl.c_dev, disk, NAMELEN);
368 (void)strncpy(spcl.c_filesys, "an unlisted file system",
369 NAMELEN);
370 }
371 }
372 #else
373 } else {
374 (void)strncpy(spcl.c_dev, disk, NAMELEN);
375 (void)strncpy(spcl.c_filesys, "an unlisted file system",
376 NAMELEN);
377 }
378 #endif
379 spcl.c_dev[NAMELEN-1]='\0';
380 spcl.c_filesys[NAMELEN-1]='\0';
381 (void)strncpy(spcl.c_label, labelstr, sizeof(spcl.c_label) - 1);
382 (void)gethostname(spcl.c_host, NAMELEN);
383 spcl.c_level = level - '0';
384 spcl.c_type = TS_TAPE;
385 if (!Tflag)
386 getdumptime(uflag); /* dumpdates snarfed */
387
388 if (spcl.c_ddate == 0 && spcl.c_level) {
389 msg("WARNING: There is no inferior level dump on this filesystem\n");
390 msg("WARNING: Assuming a level 0 dump by default\n");
391 level = '0';
392 spcl.c_level = 0;
393 }
394
395 msg("Date of this level %c dump: %s", level,
396 #ifdef __linux__
397 spcl.c_date == 0 ? "the epoch\n" : ctime4(&spcl.c_date));
398 #else
399 spcl.c_date == 0 ? "the epoch\n" : ctime(&spcl.c_date));
400 #endif
401 msg("Date of last level %c dump: %s", lastlevel,
402 #ifdef __linux__
403 spcl.c_ddate == 0 ? "the epoch\n" : ctime4(&spcl.c_ddate));
404 #else
405 spcl.c_ddate == 0 ? "the epoch\n" : ctime(&spcl.c_ddate));
406 #endif
407 msg("Dumping %s ", disk);
408 if (dt != NULL)
409 msgtail("(%s) ", dt->fs_file);
410 if (host)
411 msgtail("to %s on host %s\n", tape, host);
412 else
413 msgtail("to %s\n", tape);
414 msg("Label: %s\n", labelstr);
415
416 #ifdef __linux__
417 retval = dump_fs_open(disk, &fs);
418 if (retval) {
419 com_err(disk, retval, "while opening filesystem");
420 if (retval == EXT2_ET_REV_TOO_HIGH)
421 printf ("Get a newer version of dump!\n");
422 exit(X_STARTUP);
423 }
424 if (fs->super->s_rev_level > DUMP_CURRENT_REV) {
425 com_err(disk, retval, "while opening filesystem");
426 printf ("Get a newer version of dump!\n");
427 exit(X_STARTUP);
428 }
429 if ((diskfd = open(disk, O_RDONLY)) < 0) {
430 msg("Cannot open %s\n", disk);
431 exit(X_STARTUP);
432 }
433 sync();
434 dev_bsize = DEV_BSIZE;
435 dev_bshift = ffs(dev_bsize) - 1;
436 if (dev_bsize != (1 << dev_bshift))
437 quit("dev_bsize (%d) is not a power of 2", dev_bsize);
438 tp_bshift = ffs(TP_BSIZE) - 1;
439 if (TP_BSIZE != (1 << tp_bshift))
440 quit("TP_BSIZE (%d) is not a power of 2", TP_BSIZE);
441 maxino = fs->super->s_inodes_count;
442 #if 0
443 spcl.c_flags |= DR_NEWINODEFMT;
444 #endif
445 #else /* __linux __*/
446 if ((diskfd = open(disk, O_RDONLY)) < 0) {
447 msg("Cannot open %s\n", disk);
448 exit(X_STARTUP);
449 }
450 sync();
451 sblock = (struct fs *)sblock_buf;
452 bread(SBOFF, (char *) sblock, SBSIZE);
453 if (sblock->fs_magic != FS_MAGIC)
454 quit("bad sblock magic number\n");
455 dev_bsize = sblock->fs_fsize / fsbtodb(sblock, 1);
456 dev_bshift = ffs(dev_bsize) - 1;
457 if (dev_bsize != (1 << dev_bshift))
458 quit("dev_bsize (%d) is not a power of 2", dev_bsize);
459 tp_bshift = ffs(TP_BSIZE) - 1;
460 if (TP_BSIZE != (1 << tp_bshift))
461 quit("TP_BSIZE (%d) is not a power of 2", TP_BSIZE);
462 #ifdef FS_44INODEFMT
463 if (sblock->fs_inodefmt >= FS_44INODEFMT)
464 spcl.c_flags |= DR_NEWINODEFMT;
465 #endif
466 maxino = sblock->fs_ipg * sblock->fs_ncg;
467 #endif /* __linux__ */
468 mapsize = roundup(howmany(maxino, NBBY), TP_BSIZE);
469 usedinomap = (char *)calloc((unsigned) mapsize, sizeof(char));
470 dumpdirmap = (char *)calloc((unsigned) mapsize, sizeof(char));
471 dumpinomap = (char *)calloc((unsigned) mapsize, sizeof(char));
472 tapesize = 3 * (howmany(mapsize * sizeof(char), TP_BSIZE) + 1);
473
474 nonodump = spcl.c_level < honorlevel;
475
476 #if defined(SIGINFO)
477 (void)signal(SIGINFO, statussig);
478 #endif
479
480 msg("mapping (Pass I) [regular files]\n");
481 #ifdef __linux__
482 if (directory[0] == 0)
483 anydirskipped = mapfiles(maxino, &tapesize);
484 else
485 anydirskipped = mapfilesfromdir(maxino, &tapesize, directory);
486 #else
487 anydirskipped = mapfiles(maxino, &tapesize);
488 #endif
489
490 msg("mapping (Pass II) [directories]\n");
491 while (anydirskipped) {
492 anydirskipped = mapdirs(maxino, &tapesize);
493 }
494
495 if (pipeout || unlimited) {
496 tapesize += 10; /* 10 trailer blocks */
497 msg("estimated %ld tape blocks.\n", tapesize);
498 } else {
499 double fetapes;
500
501 if (blocksperfile)
502 fetapes = (double) tapesize / blocksperfile;
503 else if (cartridge) {
504 /* Estimate number of tapes, assuming streaming stops at
505 the end of each block written, and not in mid-block.
506 Assume no erroneous blocks; this can be compensated
507 for with an artificially low tape size. */
508 fetapes =
509 ( (double) tapesize /* blocks */
510 * TP_BSIZE /* bytes/block */
511 * (1.0/density) /* 0.1" / byte " */
512 +
513 (double) tapesize /* blocks */
514 * (1.0/ntrec) /* streaming-stops per block */
515 * 15.48 /* 0.1" / streaming-stop " */
516 ) * (1.0 / tsize ); /* tape / 0.1" " */
517 } else {
518 /* Estimate number of tapes, for old fashioned 9-track
519 tape */
520 int tenthsperirg = (density == 625) ? 3 : 7;
521 fetapes =
522 ( (double) tapesize /* blocks */
523 * TP_BSIZE /* bytes / block */
524 * (1.0/density) /* 0.1" / byte " */
525 +
526 (double) tapesize /* blocks */
527 * (1.0/ntrec) /* IRG's / block */
528 * tenthsperirg /* 0.1" / IRG " */
529 ) * (1.0 / tsize ); /* tape / 0.1" " */
530 }
531 etapes = fetapes; /* truncating assignment */
532 etapes++;
533 /* count the dumped inodes map on each additional tape */
534 tapesize += (etapes - 1) *
535 (howmany(mapsize * sizeof(char), TP_BSIZE) + 1);
536 tapesize += etapes + 10; /* headers + 10 trailer blks */
537 msg("estimated %ld tape blocks on %3.2f tape(s).\n",
538 tapesize, fetapes);
539 }
540
541 /*
542 * Allocate tape buffer.
543 */
544 if (!alloctape())
545 quit(
546 "can't allocate tape buffers - try a smaller blocking factor.\n");
547
548 startnewtape(1);
549 #ifdef __linux__
550 (void)time4(&(tstart_writing));
551 #else
552 (void)time((time_t *)&(tstart_writing));
553 #endif
554 dumpmap(usedinomap, TS_CLRI, maxino - 1);
555
556 msg("dumping (Pass III) [directories]\n");
557 dirty = 0; /* XXX just to get gcc to shut up */
558 for (map = dumpdirmap, ino = 1; ino < maxino; ino++) {
559 if (((ino - 1) % NBBY) == 0) /* map is offset by 1 */
560 dirty = *map++;
561 else
562 dirty >>= 1;
563 if ((dirty & 1) == 0)
564 continue;
565 /*
566 * Skip directory inodes deleted and maybe reallocated
567 */
568 dp = getino(ino);
569 if ((dp->di_mode & IFMT) != IFDIR)
570 continue;
571 #ifdef __linux__
572 (void)dumpdirino(dp, ino);
573 #else
574 (void)dumpino(dp, ino);
575 #endif
576 }
577
578 msg("dumping (Pass IV) [regular files]\n");
579 for (map = dumpinomap, ino = 1; ino < maxino; ino++) {
580 int mode;
581
582 if (((ino - 1) % NBBY) == 0) /* map is offset by 1 */
583 dirty = *map++;
584 else
585 dirty >>= 1;
586 if ((dirty & 1) == 0)
587 continue;
588 /*
589 * Skip inodes deleted and reallocated as directories.
590 */
591 dp = getino(ino);
592 mode = dp->di_mode & IFMT;
593 if (mode == IFDIR)
594 continue;
595 (void)dumpino(dp, ino);
596 }
597
598 #ifdef __linux__
599 (void)time4(&(tend_writing));
600 #else
601 (void)time((time_t *)&(tend_writing));
602 #endif
603 spcl.c_type = TS_END;
604 for (i = 0; i < ntrec; i++)
605 writeheader(maxino - 1);
606 if (pipeout)
607 msg("DUMP: %ld tape blocks\n", spcl.c_tapea);
608 else
609 msg("DUMP: %ld tape blocks on %d volumes(s)\n",
610 spcl.c_tapea, spcl.c_volume);
611
612 /* report dump performance, avoid division through zero */
613 if (tend_writing - tstart_writing == 0)
614 msg("finished in less than a second\n");
615 else
616 msg("finished in %d seconds, throughput %d KBytes/sec\n",
617 tend_writing - tstart_writing,
618 spcl.c_tapea / (tend_writing - tstart_writing));
619
620 tnow = do_stats();
621 putdumptime();
622 #ifdef __linux__
623 msg("DUMP: Date of this level %c dump: %s", level,
624 spcl.c_date == 0 ? "the epoch\n" : ctime4(&spcl.c_date));
625 #else
626 msg("DUMP: Date of this level %c dump: %s", level,
627 spcl.c_date == 0 ? "the epoch\n" : ctime(&spcl.c_date));
628 #endif
629 msg("DUMP: Date this dump completed: %s", ctime(&tnow));
630
631 msg("DUMP: Average transfer rate: %ld KB/s\n", xferrate / tapeno);
632
633 trewind();
634 broadcast("DUMP IS DONE!\7\7\n");
635 msg("DUMP IS DONE\n");
636 Exit(X_FINOK);
637 /* NOTREACHED */
638 return 0; /* gcc - shut up */
639 }
640
641 static void
642 usage(void)
643 {
644 char white[MAXPATHLEN];
645 int i;
646
647 strncpy(white, __progname, MAXPATHLEN-1);
648 white[MAXPATHLEN-1] = '\0';
649 for (i=0; i<MAXPATHLEN; ++i)
650 if (white[i] != '\0') white[i] = ' ';
651
652 fprintf(stderr,
653 "%s %s\n", __progname, _DUMP_VERSION);
654 fprintf(stderr,
655 "usage:\t%s [-0123456789ac"
656 #ifdef KERBEROS
657 "k"
658 #endif
659 "nu] [-B records] [-b blocksize] [-d density]\n"
660 "\t%s [-f file] [-h level] [-s feet] [-T date] filesystem\n"
661 "\t%s [-W | -w]\n", __progname, white, __progname);
662 exit(X_STARTUP);
663 }
664
665 /*
666 * Pick up a numeric argument. It must be nonnegative and in the given
667 * range (except that a vmax of 0 means unlimited).
668 */
669 static long
670 numarg(const char *meaning, long vmin, long vmax)
671 {
672 char *p;
673 long val;
674
675 val = strtol(optarg, &p, 10);
676 if (*p)
677 errx(X_STARTUP, "illegal %s -- %s", meaning, optarg);
678 if (val < vmin || (vmax && val > vmax))
679 errx(X_STARTUP, "%s must be between %ld and %ld", meaning, vmin, vmax);
680 return (val);
681 }
682
683 void
684 sig(int signo)
685 {
686 switch(signo) {
687 case SIGALRM:
688 case SIGBUS:
689 case SIGFPE:
690 case SIGHUP:
691 case SIGTERM:
692 case SIGTRAP:
693 if (pipeout)
694 quit("Signal on pipe: cannot recover\n");
695 msg("Rewriting attempted as response to unknown signal.\n");
696 (void)fflush(stderr);
697 (void)fflush(stdout);
698 close_rewind();
699 exit(X_REWRITE);
700 /* NOTREACHED */
701 case SIGSEGV:
702 msg("SIGSEGV: ABORTING!\n");
703 (void)signal(SIGSEGV, SIG_DFL);
704 (void)kill(0, SIGSEGV);
705 /* NOTREACHED */
706 }
707 }
708
709 char *
710 rawname(char *cp)
711 {
712 #ifdef __linux__
713 return cp;
714 #else /* __linux__ */
715 static char rawbuf[MAXPATHLEN];
716 char *dp = strrchr(cp, '/');
717
718 if (dp == NULL)
719 return (NULL);
720 *dp = '\0';
721 (void)strncpy(rawbuf, cp, MAXPATHLEN - 1);
722 rawbuf[MAXPATHLEN-1] = '\0';
723 *dp = '/';
724 (void)strncat(rawbuf, "/r", MAXPATHLEN - 1 - strlen(rawbuf));
725 (void)strncat(rawbuf, dp + 1, MAXPATHLEN - 1 - strlen(rawbuf));
726 return (rawbuf);
727 #endif /* __linux__ */
728 }
729
730 /*
731 * obsolete --
732 * Change set of key letters and ordered arguments into something
733 * getopt(3) will like.
734 */
735 static void
736 obsolete(int *argcp, char **argvp[])
737 {
738 int argc, flags;
739 char *ap, **argv, *flagsp=NULL, **nargv, *p=NULL;
740
741 /* Setup. */
742 argv = *argvp;
743 argc = *argcp;
744
745 /* Return if no arguments or first argument has leading dash. */
746 ap = argv[1];
747 if (argc == 1 || *ap == '-')
748 return;
749
750 /* Allocate space for new arguments. */
751 if ((*argvp = nargv = malloc((argc + 1) * sizeof(char *))) == NULL ||
752 (p = flagsp = malloc(strlen(ap) + 2)) == NULL)
753 err(X_STARTUP, "malloc new args");
754
755 *nargv++ = *argv;
756 argv += 2;
757
758 for (flags = 0; *ap; ++ap) {
759 switch (*ap) {
760 case 'B':
761 case 'b':
762 case 'd':
763 case 'f':
764 case 'h':
765 case 's':
766 case 'T':
767 if (*argv == NULL) {
768 warnx("option requires an argument -- %c", *ap);
769 usage();
770 }
771 if ((nargv[0] = malloc(strlen(*argv) + 2 + 1)) == NULL)
772 err(X_STARTUP, "malloc arg");
773 nargv[0][0] = '-';
774 nargv[0][1] = *ap;
775 (void)strcpy(&nargv[0][2], *argv);
776 ++argv;
777 ++nargv;
778 break;
779 default:
780 if (!flags) {
781 *p++ = '-';
782 flags = 1;
783 }
784 *p++ = *ap;
785 break;
786 }
787 }
788
789 /* Terminate flags. */
790 if (flags) {
791 *p = '\0';
792 *nargv++ = flagsp;
793 }
794
795 /* Copy remaining arguments. */
796 while ((*nargv++ = *argv++));
797
798 /* Update argument count. */
799 *argcp = nargv - *argvp - 1;
800 }
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