1 /*-
2 * Copyright (c) 1980, 1991, 1993, 1994
3 * The Regents of the University of California. All rights reserved.
4 *
5 * %sccs.include.redist.c%
6 */
7
8 #ifndef lint
9 static char copyright[] =
10 "@(#) Copyright (c) 1980, 1991, 1993, 1994\n\
11 The Regents of the University of California. All rights reserved.\n";
12 #endif /* not lint */
13
14 #ifndef lint
15 static char sccsid[] = "@(#)main.c 8.6 (Berkeley) 05/01/95";
16 #endif /* not lint */
17
18 #include <sys/param.h>
19 #include <sys/time.h>
20 #ifdef sunos
21 #include <sys/vnode.h>
22
23 #include <ufs/inode.h>
24 #include <ufs/fs.h>
25 #else
26 #include <ufs/ufs/dinode.h>
27 #include <ufs/ffs/fs.h>
28 #endif
29
30 #include <protocols/dumprestore.h>
31
32 #include <ctype.h>
33 #include <err.h>
34 #include <errno.h>
35 #include <fcntl.h>
36 #include <fstab.h>
37 #include <signal.h>
38 #include <stdio.h>
39 #include <stdlib.h>
40 #include <string.h>
41 #include <unistd.h>
42
43 #include "dump.h"
44 #include "pathnames.h"
45
46 #ifndef SBOFF
47 #define SBOFF (SBLOCK * DEV_BSIZE)
48 #endif
49
50 int notify = 0; /* notify operator flag */
51 int blockswritten = 0; /* number of blocks written on current tape */
52 int tapeno = 0; /* current tape number */
53 int density = 0; /* density in bytes/0.1" */
54 int ntrec = NTREC; /* # tape blocks in each tape record */
55 int cartridge = 0; /* Assume non-cartridge tape */
56 long dev_bsize = 1; /* recalculated below */
57 long blocksperfile; /* output blocks per file */
58 char *host = NULL; /* remote host (if any) */
59
60 static long numarg __P((char *, long, long));
61 static void obsolete __P((int *, char **[]));
62 static void usage __P((void));
63
64 int
main(argc,argv)65 main(argc, argv)
66 int argc;
67 char *argv[];
68 {
69 register ino_t ino;
70 register int dirty;
71 register struct dinode *dp;
72 register struct fstab *dt;
73 register char *map;
74 register int ch;
75 int i, anydirskipped, bflag = 0, Tflag = 0, honorlevel = 1;
76 ino_t maxino;
77
78 spcl.c_date = 0;
79 (void)time((time_t *)&spcl.c_date);
80
81 tsize = 0; /* Default later, based on 'c' option for cart tapes */
82 tape = _PATH_DEFTAPE;
83 dumpdates = _PATH_DUMPDATES;
84 temp = _PATH_DTMP;
85 if (TP_BSIZE / DEV_BSIZE == 0 || TP_BSIZE % DEV_BSIZE != 0)
86 quit("TP_BSIZE must be a multiple of DEV_BSIZE\n");
87 level = '0';
88
89 if (argc < 2)
90 usage();
91
92 obsolete(&argc, &argv);
93 while ((ch = getopt(argc, argv, "0123456789B:b:cd:f:h:ns:T:uWw")) != -1)
94 switch (ch) {
95 /* dump level */
96 case '0': case '1': case '2': case '3': case '4':
97 case '5': case '6': case '7': case '8': case '9':
98 level = ch;
99 break;
100
101 case 'B': /* blocks per output file */
102 blocksperfile = numarg("blocks per file", 1L, 0L);
103 break;
104
105 case 'b': /* blocks per tape write */
106 ntrec = numarg("blocks per write", 1L, 1000L);
107 break;
108
109 case 'c': /* Tape is cart. not 9-track */
110 cartridge = 1;
111 break;
112
113 case 'd': /* density, in bits per inch */
114 density = numarg("density", 10L, 327670L) / 10;
115 if (density >= 625 && !bflag)
116 ntrec = HIGHDENSITYTREC;
117 break;
118
119 case 'f': /* output file */
120 tape = optarg;
121 break;
122
123 case 'h':
124 honorlevel = numarg("honor level", 0L, 10L);
125 break;
126
127 case 'n': /* notify operators */
128 notify = 1;
129 break;
130
131 case 's': /* tape size, feet */
132 tsize = numarg("tape size", 1L, 0L) * 12 * 10;
133 break;
134
135 case 'T': /* time of last dump */
136 spcl.c_ddate = unctime(optarg);
137 if (spcl.c_ddate < 0) {
138 (void)fprintf(stderr, "bad time \"%s\"\n",
139 optarg);
140 exit(X_ABORT);
141 }
142 Tflag = 1;
143 lastlevel = '?';
144 break;
145
146 case 'u': /* update /etc/dumpdates */
147 uflag = 1;
148 break;
149
150 case 'W': /* what to do */
151 case 'w':
152 lastdump(ch);
153 exit(0); /* do nothing else */
154
155 default:
156 usage();
157 }
158 argc -= optind;
159 argv += optind;
160
161 if (argc < 1) {
162 (void)fprintf(stderr, "Must specify disk or filesystem\n");
163 exit(X_ABORT);
164 }
165 disk = *argv++;
166 argc--;
167 if (argc >= 1) {
168 (void)fprintf(stderr, "Unknown arguments to dump:");
169 while (argc--)
170 (void)fprintf(stderr, " %s", *argv++);
171 (void)fprintf(stderr, "\n");
172 exit(X_ABORT);
173 }
174 if (Tflag && uflag) {
175 (void)fprintf(stderr,
176 "You cannot use the T and u flags together.\n");
177 exit(X_ABORT);
178 }
179 if (strcmp(tape, "-") == 0) {
180 pipeout++;
181 tape = "standard output";
182 }
183
184 if (blocksperfile)
185 blocksperfile = blocksperfile / ntrec * ntrec; /* round down */
186 else {
187 /*
188 * Determine how to default tape size and density
189 *
190 * density tape size
191 * 9-track 1600 bpi (160 bytes/.1") 2300 ft.
192 * 9-track 6250 bpi (625 bytes/.1") 2300 ft.
193 * cartridge 8000 bpi (100 bytes/.1") 1700 ft.
194 * (450*4 - slop)
195 */
196 if (density == 0)
197 density = cartridge ? 100 : 160;
198 if (tsize == 0)
199 tsize = cartridge ? 1700L*120L : 2300L*120L;
200 }
201
202 if (strchr(tape, ':')) {
203 host = tape;
204 tape = strchr(host, ':');
205 *tape++ = '\0';
206 #ifdef RDUMP
207 if (rmthost(host) == 0)
208 exit(X_ABORT);
209 #else
210 (void)fprintf(stderr, "remote dump not enabled\n");
211 exit(X_ABORT);
212 #endif
213 }
214 (void)setuid(getuid()); /* rmthost() is the only reason to be setuid */
215
216 if (signal(SIGHUP, SIG_IGN) != SIG_IGN)
217 signal(SIGHUP, sig);
218 if (signal(SIGTRAP, SIG_IGN) != SIG_IGN)
219 signal(SIGTRAP, sig);
220 if (signal(SIGFPE, SIG_IGN) != SIG_IGN)
221 signal(SIGFPE, sig);
222 if (signal(SIGBUS, SIG_IGN) != SIG_IGN)
223 signal(SIGBUS, sig);
224 if (signal(SIGSEGV, SIG_IGN) != SIG_IGN)
225 signal(SIGSEGV, sig);
226 if (signal(SIGTERM, SIG_IGN) != SIG_IGN)
227 signal(SIGTERM, sig);
228 if (signal(SIGINT, interrupt) == SIG_IGN)
229 signal(SIGINT, SIG_IGN);
230
231 set_operators(); /* /etc/group snarfed */
232 getfstab(); /* /etc/fstab snarfed */
233 /*
234 * disk can be either the full special file name,
235 * the suffix of the special file name,
236 * the special name missing the leading '/',
237 * the file system name with or without the leading '/'.
238 */
239 dt = fstabsearch(disk);
240 if (dt != NULL) {
241 disk = rawname(dt->fs_spec);
242 (void)strncpy(spcl.c_dev, dt->fs_spec, NAMELEN);
243 (void)strncpy(spcl.c_filesys, dt->fs_file, NAMELEN);
244 } else {
245 (void)strncpy(spcl.c_dev, disk, NAMELEN);
246 (void)strncpy(spcl.c_filesys, "an unlisted file system",
247 NAMELEN);
248 }
249 (void)strcpy(spcl.c_label, "none");
250 (void)gethostname(spcl.c_host, NAMELEN);
251 spcl.c_level = level - '0';
252 spcl.c_type = TS_TAPE;
253 if (!Tflag)
254 getdumptime(); /* /etc/dumpdates snarfed */
255
256 msg("Date of this level %c dump: %s", level,
257 spcl.c_date == 0 ? "the epoch\n" : ctime(&spcl.c_date));
258 msg("Date of last level %c dump: %s", lastlevel,
259 spcl.c_ddate == 0 ? "the epoch\n" : ctime(&spcl.c_ddate));
260 msg("Dumping %s ", disk);
261 if (dt != NULL)
262 msgtail("(%s) ", dt->fs_file);
263 if (host)
264 msgtail("to %s on host %s\n", tape, host);
265 else
266 msgtail("to %s\n", tape);
267
268 if ((diskfd = open(disk, O_RDONLY)) < 0) {
269 msg("Cannot open %s\n", disk);
270 exit(X_ABORT);
271 }
272 sync();
273 sblock = (struct fs *)sblock_buf;
274 bread(SBOFF, (char *) sblock, SBSIZE);
275 if (sblock->fs_magic != FS_MAGIC)
276 quit("bad sblock magic number\n");
277 dev_bsize = sblock->fs_fsize / fsbtodb(sblock, 1);
278 dev_bshift = ffs(dev_bsize) - 1;
279 if (dev_bsize != (1 << dev_bshift))
280 quit("dev_bsize (%d) is not a power of 2", dev_bsize);
281 tp_bshift = ffs(TP_BSIZE) - 1;
282 if (TP_BSIZE != (1 << tp_bshift))
283 quit("TP_BSIZE (%d) is not a power of 2", TP_BSIZE);
284 #ifdef FS_44INODEFMT
285 if (sblock->fs_inodefmt >= FS_44INODEFMT)
286 spcl.c_flags |= DR_NEWINODEFMT;
287 #endif
288 maxino = sblock->fs_ipg * sblock->fs_ncg;
289 mapsize = roundup(howmany(maxino, NBBY), TP_BSIZE);
290 usedinomap = (char *)calloc((unsigned) mapsize, sizeof(char));
291 dumpdirmap = (char *)calloc((unsigned) mapsize, sizeof(char));
292 dumpinomap = (char *)calloc((unsigned) mapsize, sizeof(char));
293 tapesize = 3 * (howmany(mapsize * sizeof(char), TP_BSIZE) + 1);
294
295 nonodump = spcl.c_level < honorlevel;
296
297 msg("mapping (Pass I) [regular files]\n");
298 anydirskipped = mapfiles(maxino, &tapesize);
299
300 msg("mapping (Pass II) [directories]\n");
301 while (anydirskipped) {
302 anydirskipped = mapdirs(maxino, &tapesize);
303 }
304
305 if (pipeout) {
306 tapesize += 10; /* 10 trailer blocks */
307 msg("estimated %ld tape blocks.\n", tapesize);
308 } else {
309 double fetapes;
310
311 if (blocksperfile)
312 fetapes = (double) tapesize / blocksperfile;
313 else if (cartridge) {
314 /* Estimate number of tapes, assuming streaming stops at
315 the end of each block written, and not in mid-block.
316 Assume no erroneous blocks; this can be compensated
317 for with an artificially low tape size. */
318 fetapes =
319 ( tapesize /* blocks */
320 * TP_BSIZE /* bytes/block */
321 * (1.0/density) /* 0.1" / byte */
322 +
323 tapesize /* blocks */
324 * (1.0/ntrec) /* streaming-stops per block */
325 * 15.48 /* 0.1" / streaming-stop */
326 ) * (1.0 / tsize ); /* tape / 0.1" */
327 } else {
328 /* Estimate number of tapes, for old fashioned 9-track
329 tape */
330 int tenthsperirg = (density == 625) ? 3 : 7;
331 fetapes =
332 ( tapesize /* blocks */
333 * TP_BSIZE /* bytes / block */
334 * (1.0/density) /* 0.1" / byte */
335 +
336 tapesize /* blocks */
337 * (1.0/ntrec) /* IRG's / block */
338 * tenthsperirg /* 0.1" / IRG */
339 ) * (1.0 / tsize ); /* tape / 0.1" */
340 }
341 etapes = fetapes; /* truncating assignment */
342 etapes++;
343 /* count the dumped inodes map on each additional tape */
344 tapesize += (etapes - 1) *
345 (howmany(mapsize * sizeof(char), TP_BSIZE) + 1);
346 tapesize += etapes + 10; /* headers + 10 trailer blks */
347 msg("estimated %ld tape blocks on %3.2f tape(s).\n",
348 tapesize, fetapes);
349 }
350
351 /*
352 * Allocate tape buffer.
353 */
354 if (!alloctape())
355 quit("can't allocate tape buffers - try a smaller blocking factor.\n");
356
357 startnewtape(1);
358 (void)time((time_t *)&(tstart_writing));
359 dumpmap(usedinomap, TS_CLRI, maxino - 1);
360
361 msg("dumping (Pass III) [directories]\n");
362 dirty = 0; /* XXX just to get gcc to shut up */
363 for (map = dumpdirmap, ino = 1; ino < maxino; ino++) {
364 if (((ino - 1) % NBBY) == 0) /* map is offset by 1 */
365 dirty = *map++;
366 else
367 dirty >>= 1;
368 if ((dirty & 1) == 0)
369 continue;
370 /*
371 * Skip directory inodes deleted and maybe reallocated
372 */
373 dp = getino(ino);
374 if ((dp->di_mode & IFMT) != IFDIR)
375 continue;
376 (void)dumpino(dp, ino);
377 }
378
379 msg("dumping (Pass IV) [regular files]\n");
380 for (map = dumpinomap, ino = 1; ino < maxino; ino++) {
381 int mode;
382
383 if (((ino - 1) % NBBY) == 0) /* map is offset by 1 */
384 dirty = *map++;
385 else
386 dirty >>= 1;
387 if ((dirty & 1) == 0)
388 continue;
389 /*
390 * Skip inodes deleted and reallocated as directories.
391 */
392 dp = getino(ino);
393 mode = dp->di_mode & IFMT;
394 if (mode == IFDIR)
395 continue;
396 (void)dumpino(dp, ino);
397 }
398
399 spcl.c_type = TS_END;
400 for (i = 0; i < ntrec; i++)
401 writeheader(maxino - 1);
402 if (pipeout)
403 msg("DUMP: %ld tape blocks\n",spcl.c_tapea);
404 else
405 msg("DUMP: %ld tape blocks on %d volumes(s)\n",
406 spcl.c_tapea, spcl.c_volume);
407 putdumptime();
408 trewind();
409 broadcast("DUMP IS DONE!\7\7\n");
410 msg("DUMP IS DONE\n");
411 Exit(X_FINOK);
412 /* NOTREACHED */
413 }
414
415 static void
usage()416 usage()
417 {
418
419 (void)fprintf(stderr, "usage: dump [-0123456789cnu] [-B records] [-b blocksize] [-d density] [-f file]\n [-h level] [-s feet] [-T date] filesystem\n");
420 (void)fprintf(stderr, " dump [-W | -w]\n");
421 exit(1);
422 }
423
424 /*
425 * Pick up a numeric argument. It must be nonnegative and in the given
426 * range (except that a vmax of 0 means unlimited).
427 */
428 static long
numarg(meaning,vmin,vmax)429 numarg(meaning, vmin, vmax)
430 char *meaning;
431 long vmin, vmax;
432 {
433 char *p;
434 long val;
435
436 val = strtol(optarg, &p, 10);
437 if (*p)
438 errx(1, "illegal %s -- %s", meaning, optarg);
439 if (val < vmin || (vmax && val > vmax))
440 errx(1, "%s must be between %ld and %ld", meaning, vmin, vmax);
441 return (val);
442 }
443
444 void
sig(signo)445 sig(signo)
446 int signo;
447 {
448 switch(signo) {
449 case SIGALRM:
450 case SIGBUS:
451 case SIGFPE:
452 case SIGHUP:
453 case SIGTERM:
454 case SIGTRAP:
455 if (pipeout)
456 quit("Signal on pipe: cannot recover\n");
457 msg("Rewriting attempted as response to unknown signal.\n");
458 (void)fflush(stderr);
459 (void)fflush(stdout);
460 close_rewind();
461 exit(X_REWRITE);
462 /* NOTREACHED */
463 case SIGSEGV:
464 msg("SIGSEGV: ABORTING!\n");
465 (void)signal(SIGSEGV, SIG_DFL);
466 (void)kill(0, SIGSEGV);
467 /* NOTREACHED */
468 }
469 }
470
471 char *
rawname(cp)472 rawname(cp)
473 char *cp;
474 {
475 static char rawbuf[MAXPATHLEN];
476 char *dp = strrchr(cp, '/');
477
478 if (dp == NULL)
479 return (NULL);
480 *dp = '\0';
481 (void)strcpy(rawbuf, cp);
482 *dp = '/';
483 (void)strcat(rawbuf, "/r");
484 (void)strcat(rawbuf, dp + 1);
485 return (rawbuf);
486 }
487
488 /*
489 * obsolete --
490 * Change set of key letters and ordered arguments into something
491 * getopt(3) will like.
492 */
493 static void
obsolete(argcp,argvp)494 obsolete(argcp, argvp)
495 int *argcp;
496 char **argvp[];
497 {
498 int argc, flags;
499 char *ap, **argv, *flagsp, **nargv, *p;
500
501 /* Setup. */
502 argv = *argvp;
503 argc = *argcp;
504
505 /* Return if no arguments or first argument has leading dash. */
506 ap = argv[1];
507 if (argc == 1 || *ap == '-')
508 return;
509
510 /* Allocate space for new arguments. */
511 if ((*argvp = nargv = malloc((argc + 1) * sizeof(char *))) == NULL ||
512 (p = flagsp = malloc(strlen(ap) + 2)) == NULL)
513 err(1, NULL);
514
515 *nargv++ = *argv;
516 argv += 2;
517
518 for (flags = 0; *ap; ++ap) {
519 switch (*ap) {
520 case 'B':
521 case 'b':
522 case 'd':
523 case 'f':
524 case 'h':
525 case 's':
526 case 'T':
527 if (*argv == NULL) {
528 warnx("option requires an argument -- %c", *ap);
529 usage();
530 }
531 if ((nargv[0] = malloc(strlen(*argv) + 2 + 1)) == NULL)
532 err(1, NULL);
533 nargv[0][0] = '-';
534 nargv[0][1] = *ap;
535 (void)strcpy(&nargv[0][2], *argv);
536 ++argv;
537 ++nargv;
538 break;
539 default:
540 if (!flags) {
541 *p++ = '-';
542 flags = 1;
543 }
544 *p++ = *ap;
545 break;
546 }
547 }
548
549 /* Terminate flags. */
550 if (flags) {
551 *p = '\0';
552 *nargv++ = flagsp;
553 }
554
555 /* Copy remaining arguments. */
556 while (*nargv++ = *argv++);
557
558 /* Update argument count. */
559 *argcp = nargv - *argvp - 1;
560 }
561