Пример #1
0
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;
	rsync_friendly = 0;

	if (argc < 2)
		usage();

	obsolete(&argc, &argv);
	while ((ch = getopt(argc, argv,
	    "0123456789aB:b:C:cD:d:f:h:LnP:RrSs: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 = 10 * level + ch - '0';
			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 'r': /* store slightly less data to be friendly to rsync */
			if (rsync_friendly < 1)
				rsync_friendly = 1;
			break;

		case 'R': /* store even less data to be friendlier to rsync */
			if (rsync_friendly < 2)
				rsync_friendly = 2;
			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 = -1;
			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 (rsync_friendly && (level > 0)) {
		(void)fprintf(stderr, "%s %s\n", "rsync friendly options",
		    "can be used only with level 0 dumps.");
		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 (strchr(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;
	spcl.c_type = TS_TAPE;
	if (rsync_friendly) {
		/* don't store real dump times */
		spcl.c_date = 0;
		spcl.c_ddate = 0;
	}
	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 %d dump: %s", level, tmsg);

	if (!Tflag && (!rsync_friendly))
	        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);
	}
	if (lastlevel < 0)
		msg("Date of last (level unknown) dump: %s", tmsg);
	else
		msg("Date of last level %d 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 */
}
Пример #2
0
int
main(int argc, char **argv)
{
	struct stat sb;
	ufs1_ino_t ino;
	int dirty;
	struct ufs1_dinode *dp;
	struct	fstab *dt;
	char *map;
	int ch;
	int i, anydirskipped, bflag = 0, Tflag = 0, honorlevel = 1;
	int just_estimate = 0;
	ufs1_ino_t maxino;

	spcl.c_date = 0;
	time((time_t *)&spcl.c_date);

	tsize = 0;	/* Default later, based on 'c' option for cart tapes */
	if ((tape = getenv("TAPE")) == NULL)
		tape = _PATH_DEFTAPE;
	dumpdates = _PATH_DUMPDATES;
	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);
#ifdef KERBEROS
#define optstring "0123456789aB:b:cd:f:h:kns:ST:uWwD:C:"
#else
#define optstring "0123456789aB:b:cd:f:h:ns:ST:uWwD:C:"
#endif
	while ((ch = getopt(argc, argv, optstring)) != -1)
#undef optstring
		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':		/* Tape is cart. not 9-track */
			cartridge = 1;
			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 */
			tape = optarg;
			break;

		case 'D':
			dumpdates = optarg;
			break;

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

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

#ifdef KERBEROS
		case 'k':
			dokerberos = 1;
			break;
#endif

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

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

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

		case 'T':		/* time of last dump */
			spcl.c_ddate = unctime(optarg);
			if (spcl.c_ddate < 0) {
				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) {
		fprintf(stderr, "Must specify disk or filesystem\n");
		exit(X_STARTUP);
	}
	disk = *argv++;
	argc--;
	if (argc >= 1) {
		fprintf(stderr, "Unknown arguments to dump:");
		while (argc--)
			fprintf(stderr, " %s", *argv++);
		fprintf(stderr, "\n");
		exit(X_STARTUP);
	}
	if (Tflag && uflag) {
	        fprintf(stderr, "You cannot use the T and u flags together.\n");
		exit(X_STARTUP);
	}
	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, ':')) {
		char *ehost;
		if ((host = strdup(tape)) == NULL)
			err(1, "strdup failed");
		ehost = strchr(host, ':');
		*ehost++ = '\0';
		tape = ehost;
#ifdef RDUMP
		if (strchr(tape, '\n')) {
		    fprintf(stderr, "invalid characters in tape\n");
		    exit(X_STARTUP);
		}
		if (rmthost(host) == 0)
			exit(X_STARTUP);
#else
		fprintf(stderr, "remote dump not enabled\n");
		exit(X_STARTUP);
#endif
	}
	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);
		strncpy(spcl.c_dev, dt->fs_spec, NAMELEN);
		strncpy(spcl.c_filesys, dt->fs_file, NAMELEN);
	} else {
		strncpy(spcl.c_dev, disk, NAMELEN);
		strncpy(spcl.c_filesys, "an unlisted file system", NAMELEN);
	}
	spcl.c_dev[NAMELEN-1]='\0';
	spcl.c_filesys[NAMELEN-1]='\0';
	strcpy(spcl.c_label, "none");
	gethostname(spcl.c_host, NAMELEN);
	spcl.c_level = level - '0';
	spcl.c_type = TS_TAPE;
	if (!Tflag)
	        getdumptime();		/* /etc/dumpdates snarfed */

	msg("Date of this level %c dump: %s", level,
		spcl.c_date == 0 ? "the epoch\n" : ctime((const time_t *)&spcl.c_date));
 	msg("Date of last level %c dump: %s", lastlevel,
		spcl.c_ddate == 0 ? "the epoch\n" : ctime((const time_t *)&spcl.c_ddate));
	msg("Dumping %s ", 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);

	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);
	sync();
	sblock = (struct fs *)sblock_buf;
	bread(SBOFF, (char *) sblock, SBSIZE);
	if (sblock->fs_magic != FS_MAGIC)
		quit("bad sblock magic number\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);
#ifdef FS_44INODEFMT
	if (sblock->fs_inodefmt >= FS_44INODEFMT)
		spcl.c_flags |= DR_NEWINODEFMT;
#endif
	maxino = sblock->fs_ipg * sblock->fs_ncg;
	mapsize = roundup(howmany(maxino, NBBY), 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);
	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) % NBBY) == 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);
		if ((dp->di_mode & IFMT) != IFDIR)
			continue;
		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++) {
		int mode;

		if (((ino - 1) % NBBY) == 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 = dp->di_mode & IFMT;
		if (mode == IFDIR)
			continue;
		dumpino(dp, ino);
	}

	time(&tend_writing);
	spcl.c_type = TS_END;
	for (i = 0; i < ntrec; i++)
		writeheader(maxino - 1);
	if (pipeout)
		msg("DUMP: %ld tape blocks\n", (long)spcl.c_tapea);
	else
		msg("DUMP: %ld tape blocks on %d volume%s\n",
		    (long)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 %ld seconds, throughput %ld KBytes/sec\n",
		    (long)(tend_writing - tstart_writing),
		    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 */
}
Пример #3
0
int
main(int argc, char *argv[])
{
    ino_t ino;
    int dirty;
    union dinode *dp;
    struct fstab *dt;
    struct statvfs *mntinfo, fsbuf;
    char *map, *cp;
    int ch;
    int i, anydirskipped, bflag = 0, Tflag = 0, Fflag = 0, honorlevel = 1;
    int snap_internal = 0;
    ino_t maxino;
    time_t tnow, date;
    int dirc;
    char *mountpoint;
    int just_estimate = 0;
    char labelstr[LBLSIZE];
    char buf[MAXPATHLEN], rbuf[MAXPATHLEN];
    char *new_time_format;
    char *snap_backup = NULL;

    spcl.c_date = 0;
    (void)time(&tnow);
    spcl.c_date = tnow;
    tzset(); /* set up timezone for strftime */
    if ((new_time_format = getenv("TIMEFORMAT")) != NULL)
        time_string = new_time_format;

    tsize = 0;	/* Default later, based on 'c' option for cart tapes */
    if ((tape = getenv("TAPE")) == NULL)
        tape = _PATH_DEFTAPE;
    dumpdates = _PATH_DUMPDATES;
    temp = _PATH_DTMP;
    strcpy(labelstr, "none");	/* XXX safe strcpy. */
    if (TP_BSIZE / DEV_BSIZE == 0 || TP_BSIZE % DEV_BSIZE != 0)
        quit("TP_BSIZE must be a multiple of DEV_BSIZE\n");
    level = '0';
    timestamp = 0;

    if (argc < 2)
        usage();

    obsolete(&argc, &argv);
    while ((ch = getopt(argc, argv,
                        "0123456789aB:b:cd:eFf:h:ik:l:L:nr:s:StT:uWwx:X")) != -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("blocks per file", 1L, 0L);
            break;

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

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

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

        case 'e':		/* eject full tapes */
            eflag = 1;
            break;

        case 'F':		/* files-to-dump is an fs image */
            Fflag = 1;
            break;

        case 'f':		/* output file */
            tape = optarg;
            break;

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

        case 'i':	/* "true incremental" regardless level */
            level = 'i';
            trueinc = 1;
            break;

        case 'k':
            readblksize = numarg("read block size", 0, 64) * 1024;
            break;

        case 'l':		/* autoload after eject full tapes */
            eflag = 1;
            lflag = numarg("timeout (in seconds)", 1, 0);
            break;

        case 'L':
            /*
             * Note that although there are LBLSIZE characters,
             * the last must be '\0', so the limit on strlen()
             * is really LBLSIZE-1.
             */
            if (strlcpy(labelstr, optarg, sizeof(labelstr))
                    >= sizeof(labelstr)) {
                msg(
                    "WARNING Label `%s' is larger than limit of %lu characters.\n",
                    optarg,
                    (unsigned long)sizeof(labelstr) - 1);
                msg("WARNING: Using truncated label `%s'.\n",
                    labelstr);
            }
            break;
        case 'n':		/* notify operators */
            notify = 1;
            break;

        case 'r':		/* read cache size */
            readcache = numarg("read cache size", 0, 512);
            break;

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

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

        case 't':
            timestamp = 1;
            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 */

        case 'x':
            snap_backup = optarg;
            break;

        case 'X':
            snap_internal = 1;
            break;

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

    if (argc < 1) {
        (void)fprintf(stderr,
                      "Must specify disk or image, or file list\n");
        exit(X_STARTUP);
    }


    /*
     *	determine if disk is a subdirectory, and setup appropriately
     */
    getfstab();		/* /etc/fstab snarfed */
    disk = NULL;
    disk_dev = NULL;
    mountpoint = NULL;
    dirc = 0;
    for (i = 0; i < argc; i++) {
        struct stat sb;
        int error;

        error = lstat(argv[i], &sb);
        if (Fflag || (!error && (S_ISCHR(sb.st_mode) || S_ISBLK(sb.st_mode)))) {
            if (error)
                quit("Cannot stat %s: %s\n", argv[i], strerror(errno));
            disk = argv[i];
multicheck:
            if (dirc != 0)
                quit("Can't dump a disk or image at the same time as a file list\n");
            break;
        }
        if ((dt = fstabsearch(argv[i])) != NULL) {
            disk = argv[i];
            mountpoint = xstrdup(dt->fs_file);
            goto multicheck;
        }
        if (statvfs(argv[i], &fsbuf) == -1)
            quit("Cannot statvfs %s: %s\n", argv[i],
                 strerror(errno));
        disk = fsbuf.f_mntfromname;
        if (strcmp(argv[i], fsbuf.f_mntonname) == 0)
            goto multicheck;
        if (mountpoint == NULL) {
            mountpoint = xstrdup(fsbuf.f_mntonname);
            if (uflag) {
                msg("Ignoring u flag for subdir dump\n");
                uflag = 0;
            }
            if (level > '0') {
                msg("Subdir dump is done at level 0\n");
                level = '0';
            }
            msg("Dumping sub files/directories from %s\n",
                mountpoint);
        } else {
            if (strcmp(mountpoint, fsbuf.f_mntonname) != 0)
                quit("%s is not on %s\n", argv[i], mountpoint);
        }
        msg("Dumping file/directory %s\n", argv[i]);
        dirc++;
    }
    if (mountpoint)
        free(mountpoint);

    if (dirc == 0) {
        argv++;
        if (argc != 1) {
            (void)fprintf(stderr, "Excess 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 (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)
         */
        if (density == 0)
            density = cartridge ? 100 : 160;
        if (tsize == 0)
            tsize = cartridge ? 1700L*120L : 2300L*120L;
    }

    if ((cp = strchr(tape, ':')) != NULL) {
        host = tape;
        /* This is fine, because all the const strings don't have : */
        *cp++ = '\0';
        tape = cp;
#ifdef RDUMP
        if (rmthost(host) == 0)
            exit(X_STARTUP);
#else
        (void)fprintf(stderr, "remote dump not enabled\n");
        exit(X_STARTUP);
#endif
    }

    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 0
    if (signal(SIGSEGV, SIG_IGN) != SIG_IGN)
        signal(SIGSEGV, sig);
#endif
    if (signal(SIGTERM, SIG_IGN) != SIG_IGN)
        signal(SIGTERM, sig);
    if (signal(SIGINT, interrupt) == SIG_IGN)
        signal(SIGINT, SIG_IGN);

    /*
     *	disk can be either the full special file name, or
     *	the file system name.
     */
    mountpoint = NULL;
    mntinfo = mntinfosearch(disk);
    if ((dt = fstabsearch(disk)) != NULL) {
        if (getfsspecname(buf, sizeof(buf), dt->fs_spec) == NULL)
            quit("%s (%s)", buf, strerror(errno));
        if (getdiskrawname(rbuf, sizeof(rbuf), buf) == NULL)
            quit("Can't get disk raw name for `%s' (%s)",
                 buf, strerror(errno));
        disk = rbuf;
        mountpoint = dt->fs_file;
        msg("Found %s on %s in %s\n", disk, mountpoint, _PATH_FSTAB);
    } else if (mntinfo != NULL) {
        if (getdiskrawname(rbuf, sizeof(rbuf), mntinfo->f_mntfromname)
                == NULL)
            quit("Can't get disk raw name for `%s' (%s)",
                 mntinfo->f_mntfromname, strerror(errno));
        disk = rbuf;
        mountpoint = mntinfo->f_mntonname;
        msg("Found %s on %s in mount table\n", disk, mountpoint);
    }
    if (mountpoint != NULL) {
        if (dirc != 0)
            (void)snprintf(spcl.c_filesys, sizeof(spcl.c_filesys),
                           "a subset of %s", mountpoint);
        else
            (void)strlcpy(spcl.c_filesys, mountpoint,
                          sizeof(spcl.c_filesys));
    } else if (Fflag) {
        (void)strlcpy(spcl.c_filesys, "a file system image",
                      sizeof(spcl.c_filesys));
    } else {
        (void)strlcpy(spcl.c_filesys, "an unlisted file system",
                      sizeof(spcl.c_filesys));
    }
    (void)strlcpy(spcl.c_dev, disk, sizeof(spcl.c_dev));
    (void)strlcpy(spcl.c_label, labelstr, sizeof(spcl.c_label));
    (void)gethostname(spcl.c_host, sizeof(spcl.c_host));
    spcl.c_host[sizeof(spcl.c_host) - 1] = '\0';

    if ((snap_backup != NULL || snap_internal) && mntinfo == NULL) {
        msg("WARNING: Cannot use -x or -X on unmounted file system.\n");
        snap_backup = NULL;
        snap_internal = 0;
    }

#ifdef DUMP_LFS
    sync();
    if (snap_backup != NULL || snap_internal) {
        if (lfs_wrap_stop(mountpoint) < 0) {
            msg("Cannot stop writing on %s\n", mountpoint);
            exit(X_STARTUP);
        }
    }
    if ((diskfd = open(disk, O_RDONLY)) < 0) {
        msg("Cannot open %s\n", disk);
        exit(X_STARTUP);
    }
    disk_dev = disk;
#else /* ! DUMP_LFS */
    if (snap_backup != NULL || snap_internal) {
        diskfd = snap_open(mntinfo->f_mntonname, snap_backup,
                           &tnow, &disk_dev);
        if (diskfd < 0) {
            msg("Cannot open snapshot of %s\n",
                mntinfo->f_mntonname);
            exit(X_STARTUP);
        }
        spcl.c_date = tnow;
    } else {
        if ((diskfd = open(disk, O_RDONLY)) < 0) {
            msg("Cannot open %s\n", disk);
            exit(X_STARTUP);
        }
        disk_dev = disk;
    }
    sync();
#endif /* ! DUMP_LFS */

    needswap = fs_read_sblock(sblock_buf);

    /* true incremental is always a level 10 dump */
    spcl.c_level = trueinc? iswap32(10): iswap32(level - '0');
    spcl.c_type = iswap32(TS_TAPE);
    spcl.c_date = iswap32(spcl.c_date);
    spcl.c_ddate = iswap32(spcl.c_ddate);
    if (!Tflag)
        getdumptime();		/* /etc/dumpdates snarfed */

    date = iswap32(spcl.c_date);
    msg("Date of this level %c dump: %s", level,
        spcl.c_date == 0 ? "the epoch\n" : ctime(&date));
    date = iswap32(spcl.c_ddate);
    msg("Date of last level %c dump: %s", lastlevel,
        spcl.c_ddate == 0 ? "the epoch\n" : ctime(&date));
    msg("Dumping ");
    if (snap_backup != NULL || snap_internal)
        msgtail("a snapshot of ");
    if (dirc != 0)
        msgtail("a subset of ");
    msgtail("%s (%s) ", disk, spcl.c_filesys);
    if (host)
        msgtail("to %s on host %s\n", tape, host);
    else
        msgtail("to %s\n", tape);
    msg("Label: %s\n", labelstr);

    ufsib = fs_parametrize();

    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 = fs_maxino();
    mapsize = roundup(howmany(maxino, NBBY), TP_BSIZE);
    usedinomap = (char *)xcalloc((unsigned) mapsize, sizeof(char));
    dumpdirmap = (char *)xcalloc((unsigned) mapsize, sizeof(char));
    dumpinomap = (char *)xcalloc((unsigned) mapsize, sizeof(char));
    tapesize = 3 * (howmany(mapsize * sizeof(char), TP_BSIZE) + 1);

    nonodump = iswap32(spcl.c_level) < honorlevel;

    initcache(readcache, readblksize);

    (void)signal(SIGINFO, statussig);

    msg("mapping (Pass I) [regular files]\n");
    anydirskipped = mapfiles(maxino, &tapesize, mountpoint,
                             (dirc ? argv : NULL));

    msg("mapping (Pass II) [directories]\n");
    while (anydirskipped) {
        anydirskipped = mapdirs(maxino, &tapesize);
    }

    if (pipeout || unlimited) {
        tapesize += 10;	/* 10 trailer blocks */
        msg("estimated %llu tape blocks.\n",
            (unsigned long long)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 =
                (	  tapesize	/* blocks */
                      * TP_BSIZE	/* bytes / block */
                      * (1.0/density)	/* 0.1" / byte */
                      +
                      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 %llu tape blocks on %3.2f tape(s).\n",
            (unsigned long long)tapesize, fetapes);
    }
    /*
     * If the user only wants an estimate of the number of
     * tapes, exit now.
     */
    if (just_estimate)
        exit(X_FINOK);

    /*
     * 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));
    xferrate = 0;
    dumpmap(usedinomap, TS_CLRI, maxino - 1);

    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) % NBBY) == 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);
        if ((DIP(dp, mode) & IFMT) != IFDIR)
            continue;
        (void)dumpino(dp, ino);
    }

    msg("dumping (Pass IV) [regular files]\n");
    for (map = dumpinomap, ino = 1; ino < maxino; ino++) {
        int mode;

        if (((ino - 1) % NBBY) == 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 = DIP(dp, mode) & IFMT;
        if (mode == IFDIR)
            continue;
        (void)dumpino(dp, ino);
    }

    spcl.c_type = iswap32(TS_END);
    for (i = 0; i < ntrec; i++)
        writeheader(maxino - 1);
    if (pipeout)
        msg("%lld tape blocks\n",(long long)iswap64(spcl.c_tapea));
    else
        msg("%lld tape blocks on %d volume%s\n",
            (long long)iswap64(spcl.c_tapea), iswap32(spcl.c_volume),
            (iswap32(spcl.c_volume) == 1) ? "" : "s");
    tnow = do_stats();
    date = iswap32(spcl.c_date);
    msg("Date of this level %c dump: %s", level,
        spcl.c_date == 0 ? "the epoch\n" : ctime(&date));
    msg("Date this dump completed:  %s", ctime(&tnow));
    msg("Average transfer rate: %d KB/s\n", xferrate / tapeno);
    putdumptime();
    trewind(0);
    broadcast("DUMP IS DONE!\a\a\n");
#ifdef DUMP_LFS
    lfs_wrap_go();
#endif /* DUMP_LFS */
    msg("DUMP IS DONE\n");
    Exit(X_FINOK);
    /* NOTREACHED */
    exit(X_FINOK);		/* XXX: to satisfy gcc */
}
Пример #4
0
int
main(int argc, char *argv[])
{
	ino_t ino;
	int dirty;
	union dinode *dp;
	struct	fstab *dt;
	char *map;
	int ch, mode;
	struct tm then;
	struct statfs fsbuf;
	int i, anydirskipped, bflag = 0, Tflag = 0, honorlevel = 1;
	ino_t maxino;
	time_t t;
	int dirlist;
	char *toplevel, *str, *mount_point = NULL;

	spcl.c_date = (int64_t)time(NULL);

	tsize = 0;	/* Default later, based on 'c' option for cart tapes */
	if ((tape = getenv("TAPE")) == NULL)
		tape = _PATH_DEFTAPE;
	dumpdates = _PATH_DUMPDATES;
	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:cd:f:h:ns: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 'B':		/* blocks per output file */
			blocksperfile = numarg("blocks per file", 1L, 0L);
			break;

		case 'b':		/* blocks per tape write */
			ntrec = numarg("blocks per write", 1L, 1000L);
			if (ntrec > maxbsize/1024) {
				msg("Please choose a blocksize <= %dKB\n",
				    maxbsize/1024);
				exit(X_STARTUP);
			}
			bflag = 1;
			break;

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

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

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

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

		case 'T':		/* time of last dump */
			str = strptime(optarg, "%a %b %e %H:%M:%S %Y", &then);
			then.tm_isdst = -1;
			if (str == NULL || (*str != '\n' && *str != '\0'))
				spcl.c_ddate = -1;
			else
				spcl.c_ddate = (int64_t)mktime(&then);
			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 */
			break;

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

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

	if (argc < 1) {
		(void)fprintf(stderr, "Must specify disk or filesystem\n");
		exit(X_STARTUP);
	}

	/*
	 *	determine if disk is a subdirectory, and setup appropriately
	 */
	dirlist = 0;
	toplevel = NULL;
	for (i = 0; i < argc; i++) {
		struct stat sb;

		if (lstat(argv[i], &sb) == -1) {
			msg("Cannot lstat %s: %s\n", argv[i], strerror(errno));
			exit(X_STARTUP);
		}
		if (!S_ISDIR(sb.st_mode) && !S_ISREG(sb.st_mode))
			break;
		if (statfs(argv[i], &fsbuf) == -1) {
			msg("Cannot statfs %s: %s\n", argv[i], strerror(errno));
			exit(X_STARTUP);
		}
		if (strcmp(argv[i], fsbuf.f_mntonname) == 0) {
			if (dirlist != 0) {
				msg("Can't dump a mountpoint and a filelist\n");
				exit(X_STARTUP);
			}
			break;		/* exit if sole mountpoint */
		}
		if (!disk) {
			if ((toplevel = strdup(fsbuf.f_mntonname)) == NULL) {
				msg("Cannot malloc diskname\n");
				exit(X_STARTUP);
			}
			disk = toplevel;
			if (uflag) {
				msg("Ignoring u flag for subdir dump\n");
				uflag = 0;
			}
			if (level > '0') {
				msg("Subdir dump is done at level 0\n");
				level = '0';
			}
			msg("Dumping sub files/directories from %s\n", disk);
		} else {
			if (strcmp(disk, fsbuf.f_mntonname) != 0) {
				msg("%s is not on %s\n", argv[i], disk);
				exit(X_STARTUP);
			}
		}
		msg("Dumping file/directory %s\n", argv[i]);
		dirlist++;
	}
	if (dirlist == 0) {
		disk = *argv++;
		if (argc != 1) {
			(void)fputs("Excess arguments to dump:", stderr);
			while (--argc) {
				(void)putc(' ', stderr);
				(void)fputs(*argv++, stderr);
			}
			(void)putc('\n', stderr);
			exit(X_STARTUP);
		}
	}
	if (Tflag && uflag) {
	        (void)fprintf(stderr,
		    "You cannot use the T and u flags together.\n");
		exit(X_STARTUP);
	}
	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)
		 */
		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 (rmthost(host) == 0)
			exit(X_STARTUP);
#else
		(void)fprintf(stderr, "remote dump not enabled\n");
		exit(X_STARTUP);
#endif
	}

	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);

	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 '/'.
	 */
	if (!statfs(disk, &fsbuf) && !strcmp(fsbuf.f_mntonname, disk)) {
		/* mounted disk? */
		disk = rawname(fsbuf.f_mntfromname);
		if (!disk) {
			(void)fprintf(stderr, "cannot get raw name for %s\n",
			    fsbuf.f_mntfromname);
			exit(X_STARTUP);
		}
		mount_point = fsbuf.f_mntonname;
		(void)strlcpy(spcl.c_dev, fsbuf.f_mntfromname,
		    sizeof(spcl.c_dev));
		if (dirlist != 0) {
			(void)snprintf(spcl.c_filesys, sizeof(spcl.c_filesys),
			    "a subset of %s", mount_point);
		} else {
			(void)strlcpy(spcl.c_filesys, mount_point,
			    sizeof(spcl.c_filesys));
		}
	} else if ((dt = fstabsearch(disk)) != NULL) {
		/* in fstab? */
		disk = rawname(dt->fs_spec);
		mount_point = dt->fs_file;
		(void)strlcpy(spcl.c_dev, dt->fs_spec, sizeof(spcl.c_dev));
		if (dirlist != 0) {
			(void)snprintf(spcl.c_filesys, sizeof(spcl.c_filesys),
			    "a subset of %s", mount_point);
		} else {
			(void)strlcpy(spcl.c_filesys, mount_point,
			    sizeof(spcl.c_filesys));
		}
	} else {
		/* must be a device */
		(void)strlcpy(spcl.c_dev, disk, sizeof(spcl.c_dev));
		(void)strlcpy(spcl.c_filesys, "an unlisted file system",
		    sizeof(spcl.c_filesys));
	}
	(void)strlcpy(spcl.c_label, "none", sizeof(spcl.c_label));
	(void)gethostname(spcl.c_host, sizeof(spcl.c_host));
	spcl.c_level = level - '0';
	spcl.c_type = TS_TAPE;
	if (!Tflag)
	        getdumptime();		/* /etc/dumpdates snarfed */

	t = (time_t)spcl.c_date;
	msg("Date of this level %c dump: %s", level,
		t == 0 ? "the epoch\n" : ctime(&t));
	t = (time_t)spcl.c_ddate;
 	msg("Date of last level %c dump: %s", lastlevel,
		t == 0 ? "the epoch\n" : ctime(&t));
	msg("Dumping %s ", disk);
	if (mount_point != NULL)
		msgtail("(%s) ", mount_point);
	if (host)
		msgtail("to %s on host %s\n", tape, host);
	else
		msgtail("to %s\n", tape);

	if ((diskfd = open(disk, O_RDONLY)) < 0) {
		msg("Cannot open %s\n", disk);
		exit(X_STARTUP);
	}
	sync();
	sblock = (struct fs *)sblock_buf;
	for (i = 0; sblock_try[i] != -1; i++) {
		ssize_t n = pread(diskfd, sblock, SBLOCKSIZE,
		    (off_t)sblock_try[i]);
		if (n == SBLOCKSIZE && (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 filesystem 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 (%d) is not a power of 2\n", dev_bsize);
	tp_bshift = ffs(TP_BSIZE) - 1;
	if (TP_BSIZE != (1 << tp_bshift))
		quit("TP_BSIZE (%d) is not a power of 2\n", TP_BSIZE);
#ifdef FS_44INODEFMT
	if (sblock->fs_magic == FS_UFS2_MAGIC ||
	    sblock->fs_inodefmt >= FS_44INODEFMT)
		spcl.c_flags |= DR_NEWINODEFMT;
#endif
	maxino = sblock->fs_ipg * sblock->fs_ncg;
	mapsize = roundup(howmany(maxino, NBBY), 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;

	(void)signal(SIGINFO, statussig);

	msg("mapping (Pass I) [regular files]\n");
	anydirskipped = mapfiles(maxino, &tapesize, toplevel,
	    (dirlist ? argv : NULL));

	msg("mapping (Pass II) [directories]\n");
	while (anydirskipped) {
		anydirskipped = mapdirs(maxino, &tapesize);
	}

	if (pipeout || unlimited) {
		tapesize += 10;	/* 10 trailer blocks */
		msg("estimated %lld 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 =
			(	  tapesize	/* blocks */
				* TP_BSIZE	/* bytes/block */
				* (1.0/density)	/* 0.1" / byte */
			  +
				  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 =
			(	  tapesize	/* blocks */
				* TP_BSIZE	/* bytes / block */
				* (1.0/density)	/* 0.1" / byte */
			  +
				  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 %lld tape blocks on %3.2f tape(s).\n",
		    tapesize, fetapes);
	}

	/*
	 * 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));
	xferrate = 0;
	dumpmap(usedinomap, TS_CLRI, maxino - 1);

	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) % NBBY) == 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);
	}

	msg("dumping (Pass IV) [regular files]\n");
	for (map = dumpinomap, ino = 1; ino < maxino; ino++) {
		if (((ino - 1) % NBBY) == 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);
	}

	spcl.c_type = TS_END;
	for (i = 0; i < ntrec; i++)
		writeheader(maxino - 1);
	if (pipeout)
		msg("%lld tape blocks\n", spcl.c_tapea);
	else
		msg("%lld tape blocks on %d volume%s\n",
		    spcl.c_tapea, spcl.c_volume,
		    (spcl.c_volume == 1) ? "" : "s");
	t = (time_t)spcl.c_date;
	msg("Date of this level %c dump: %s", level,
	    t == 0 ? "the epoch\n" : ctime(&t));
	t = do_stats();
	msg("Date this dump completed:  %s", ctime(&t));
	msg("Average transfer rate: %ld KB/s\n", xferrate / tapeno);
	putdumptime();
	trewind();
	broadcast("DUMP IS DONE!\7\7\n");
	msg("DUMP IS DONE\n");
	Exit(X_FINOK);
	/* NOTREACHED */
}