498 lines
13 KiB
C
498 lines
13 KiB
C
/*-
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* Copyright (c) 1980, 1991 The Regents of the University of California.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef lint
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char copyright[] =
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"@(#) Copyright (c) 1980, 1991 The Regents of the University of California.\n\
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All rights reserved.\n";
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#endif /* not lint */
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#ifndef lint
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/*static char sccsid[] = "from: @(#)dumpmain.c 5.16 (Berkeley) 4/24/91";*/
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static char rcsid[] = "$Id: dumpmain.c,v 1.5 1993/08/01 18:27:47 mycroft Exp $";
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#endif /* not lint */
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#include <sys/param.h>
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#include <ufs/dir.h>
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#include <ufs/dinode.h>
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#include <ufs/fs.h>
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#include <protocols/dumprestore.h>
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#include <signal.h>
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#ifdef __STDC__
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#include <time.h>
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#endif
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#include <fcntl.h>
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#include <fstab.h>
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#include <stdio.h>
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#ifdef __STDC__
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#include <unistd.h>
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#include <stdlib.h>
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#include <string.h>
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#endif
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#include "dump.h"
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#include "pathnames.h"
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int notify = 0; /* notify operator flag */
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int blockswritten = 0; /* number of blocks written on current tape */
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int tapeno = 0; /* current tape number */
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int density = 0; /* density in bytes/0.1" */
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int ntrec = NTREC; /* # tape blocks in each tape record */
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int cartridge = 0; /* Assume non-cartridge tape */
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long dev_bsize = 1; /* recalculated below */
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long blocksperfile; /* output blocks per file */
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#ifdef RDUMP
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char *host;
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int rmthost();
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#endif
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main(argc, argv)
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int argc;
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char **argv;
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{
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register ino_t ino;
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register int dirty;
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register struct dinode *dp;
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register struct fstab *dt;
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register char *map;
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register char *cp;
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int i, anydirskipped, bflag = 0;
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float fetapes;
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ino_t maxino;
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time(&(spcl.c_date));
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tsize = 0; /* Default later, based on 'c' option for cart tapes */
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tape = _PATH_DEFTAPE;
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dumpdates = _PATH_DUMPDATES;
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temp = _PATH_DTMP;
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if (TP_BSIZE / DEV_BSIZE == 0 || TP_BSIZE % DEV_BSIZE != 0)
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quit("TP_BSIZE must be a multiple of DEV_BSIZE\n");
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level = '0';
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argv++;
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argc -= 2;
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for (cp = *argv++; cp && *cp; cp++) {
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switch (*cp) {
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case '-':
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continue;
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case 'w':
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lastdump('w'); /* tell us only what has to be done */
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exit(0);
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case 'W': /* what to do */
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lastdump('W'); /* tell us state of what is done */
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exit(0); /* do nothing else */
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case 'f': /* output file */
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if (argc < 1)
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break;
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tape = *argv++;
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argc--;
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continue;
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case 'd': /* density, in bits per inch */
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if (argc < 1)
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break;
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density = atoi(*argv) / 10;
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if (density < 1) {
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fprintf(stderr, "bad density \"%s\"\n", *argv);
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Exit(X_ABORT);
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}
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argc--;
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argv++;
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if (density >= 625 && !bflag)
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ntrec = HIGHDENSITYTREC;
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continue;
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case 's': /* tape size, feet */
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if (argc < 1)
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break;
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tsize = atol(*argv);
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if (tsize < 1) {
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fprintf(stderr, "bad size \"%s\"\n", *argv);
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Exit(X_ABORT);
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}
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argc--;
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argv++;
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tsize *= 12 * 10;
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continue;
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case 'b': /* blocks per tape write */
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if (argc < 1)
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break;
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bflag++;
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ntrec = atoi(*argv);
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if (ntrec < 1) {
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fprintf(stderr, "%s \"%s\"\n",
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"bad number of blocks per write ", *argv);
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Exit(X_ABORT);
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}
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argc--;
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argv++;
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continue;
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case 'B': /* blocks per output file */
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if (argc < 1)
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break;
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blocksperfile = atol(*argv);
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if (blocksperfile < 1) {
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fprintf(stderr, "%s \"%s\"\n",
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"bad number of blocks per file ", *argv);
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Exit(X_ABORT);
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}
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argc--;
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argv++;
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continue;
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case 'c': /* Tape is cart. not 9-track */
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cartridge++;
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continue;
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case '0': /* dump level */
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case '1':
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case '2':
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case '3':
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case '4':
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case '5':
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case '6':
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case '7':
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case '8':
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case '9':
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level = *cp;
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continue;
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case 'u': /* update /etc/dumpdates */
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uflag++;
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continue;
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case 'n': /* notify operators */
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notify++;
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continue;
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default:
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fprintf(stderr, "bad key '%c'\n", *cp);
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Exit(X_ABORT);
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}
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fprintf(stderr, "missing argument to '%c'\n", *cp);
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Exit(X_ABORT);
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}
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if (argc < 1) {
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fprintf(stderr, "Must specify disk or filesystem\n");
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Exit(X_ABORT);
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} else {
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disk = *argv++;
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argc--;
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}
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if (argc >= 1) {
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fprintf(stderr, "Unknown arguments to dump:");
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while (argc--)
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fprintf(stderr, " %s", *argv++);
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fprintf(stderr, "\n");
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Exit(X_ABORT);
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}
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if (strcmp(tape, "-") == 0) {
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pipeout++;
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tape = "standard output";
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}
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if (blocksperfile)
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blocksperfile = blocksperfile / ntrec * ntrec; /* round down */
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else {
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/*
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* Determine how to default tape size and density
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*
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* density tape size
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* 9-track 1600 bpi (160 bytes/.1") 2300 ft.
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* 9-track 6250 bpi (625 bytes/.1") 2300 ft.
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* cartridge 8000 bpi (100 bytes/.1") 1700 ft.
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* (450*4 - slop)
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*/
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if (density == 0)
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density = cartridge ? 100 : 160;
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if (tsize == 0)
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tsize = cartridge ? 1700L*120L : 2300L*120L;
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}
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#ifdef RDUMP
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{ char *index();
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host = tape;
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tape = index(host, ':');
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if (tape == 0) {
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msg("need keyletter ``f'' and device ``host:tape''\n");
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exit(1);
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}
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*tape++ = 0;
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if (rmthost(host) == 0)
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exit(X_ABORT);
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}
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setuid(getuid()); /* rmthost() is the only reason to be setuid */
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#endif
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if (signal(SIGHUP, SIG_IGN) != SIG_IGN)
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signal(SIGHUP, sighup);
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if (signal(SIGTRAP, SIG_IGN) != SIG_IGN)
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signal(SIGTRAP, sigtrap);
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if (signal(SIGFPE, SIG_IGN) != SIG_IGN)
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signal(SIGFPE, sigfpe);
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if (signal(SIGBUS, SIG_IGN) != SIG_IGN)
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signal(SIGBUS, sigbus);
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if (signal(SIGSEGV, SIG_IGN) != SIG_IGN)
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signal(SIGSEGV, sigsegv);
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if (signal(SIGTERM, SIG_IGN) != SIG_IGN)
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signal(SIGTERM, sigterm);
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if (signal(SIGINT, interrupt) == SIG_IGN)
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signal(SIGINT, SIG_IGN);
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set_operators(); /* /etc/group snarfed */
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getfstab(); /* /etc/fstab snarfed */
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/*
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* disk can be either the full special file name,
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* the suffix of the special file name,
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* the special name missing the leading '/',
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* the file system name with or without the leading '/'.
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*/
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dt = fstabsearch(disk);
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if (dt != 0) {
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disk = rawname(dt->fs_spec);
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strncpy(spcl.c_dev, dt->fs_spec, NAMELEN);
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strncpy(spcl.c_filesys, dt->fs_file, NAMELEN);
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} else {
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strncpy(spcl.c_dev, disk, NAMELEN);
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strncpy(spcl.c_filesys, "an unlisted file system", NAMELEN);
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}
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strcpy(spcl.c_label, "none");
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gethostname(spcl.c_host, NAMELEN);
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spcl.c_level = level - '0';
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spcl.c_type = TS_TAPE;
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getdumptime(); /* /etc/dumpdates snarfed */
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msg("Date of this level %c dump: %s", level,
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spcl.c_date == 0 ? "the epoch\n" : ctime(&spcl.c_date));
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msg("Date of last level %c dump: %s", lastlevel,
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spcl.c_ddate == 0 ? "the epoch\n" : ctime(&spcl.c_ddate));
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msg("Dumping %s ", disk);
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if (dt != 0)
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msgtail("(%s) ", dt->fs_file);
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#ifdef RDUMP
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msgtail("to %s on host %s\n", tape, host);
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#else
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msgtail("to %s\n", tape);
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#endif
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if ((diskfd = open(disk, O_RDONLY)) < 0) {
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msg("Cannot open %s\n", disk);
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Exit(X_ABORT);
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}
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sync();
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sblock = (struct fs *)buf;
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bread(SBOFF, sblock, SBSIZE);
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if (sblock->fs_magic != FS_MAGIC)
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quit("bad sblock magic number\n");
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dev_bsize = sblock->fs_fsize / fsbtodb(sblock, 1);
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dev_bshift = ffs(dev_bsize) - 1;
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if (dev_bsize != (1 << dev_bshift))
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quit("dev_bsize (%d) is not a power of 2", dev_bsize);
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tp_bshift = ffs(TP_BSIZE) - 1;
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if (TP_BSIZE != (1 << tp_bshift))
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quit("TP_BSIZE (%d) is not a power of 2", TP_BSIZE);
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maxino = sblock->fs_ipg * sblock->fs_ncg - 1;
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mapsize = roundup(howmany(sblock->fs_ipg * sblock->fs_ncg, NBBY),
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TP_BSIZE);
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usedinomap = (char *)calloc(mapsize, sizeof(char));
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dumpdirmap = (char *)calloc(mapsize, sizeof(char));
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dumpinomap = (char *)calloc(mapsize, sizeof(char));
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tapesize = 3 * (howmany(mapsize * sizeof(char), TP_BSIZE) + 1);
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msg("mapping (Pass I) [regular files]\n");
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anydirskipped = mapfiles(maxino, &tapesize);
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msg("mapping (Pass II) [directories]\n");
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while (anydirskipped) {
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anydirskipped = mapdirs(maxino, &tapesize);
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}
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if (pipeout)
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tapesize += 10; /* 10 trailer blocks */
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else {
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if (blocksperfile)
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fetapes = (float) tapesize / blocksperfile;
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else if (cartridge) {
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/* Estimate number of tapes, assuming streaming stops at
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the end of each block written, and not in mid-block.
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Assume no erroneous blocks; this can be compensated
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for with an artificially low tape size. */
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fetapes =
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( tapesize /* blocks */
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* TP_BSIZE /* bytes/block */
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* (1.0/density) /* 0.1" / byte */
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+
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tapesize /* blocks */
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* (1.0/ntrec) /* streaming-stops per block */
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* 15.48 /* 0.1" / streaming-stop */
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) * (1.0 / tsize ); /* tape / 0.1" */
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} else {
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/* Estimate number of tapes, for old fashioned 9-track
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tape */
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int tenthsperirg = (density == 625) ? 3 : 7;
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fetapes =
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( tapesize /* blocks */
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* TP_BSIZE /* bytes / block */
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* (1.0/density) /* 0.1" / byte */
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+
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tapesize /* blocks */
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* (1.0/ntrec) /* IRG's / block */
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* tenthsperirg /* 0.1" / IRG */
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) * (1.0 / tsize ); /* tape / 0.1" */
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}
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etapes = fetapes; /* truncating assignment */
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etapes++;
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/* count the dumped inodes map on each additional tape */
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tapesize += (etapes - 1) *
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(howmany(mapsize * sizeof(char), TP_BSIZE) + 1);
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tapesize += etapes + 10; /* headers + 10 trailer blks */
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}
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if (pipeout)
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msg("estimated %ld tape blocks.\n", tapesize);
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else
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msg("estimated %ld tape blocks on %3.2f tape(s).\n",
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tapesize, fetapes);
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alloctape(); /* Allocate tape buffer */
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startnewtape();
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time(&(tstart_writing));
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dumpmap(usedinomap, TS_CLRI, maxino);
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msg("dumping (Pass III) [directories]\n");
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for (map = dumpdirmap, ino = 0; ino < maxino; ) {
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if ((ino % NBBY) == 0)
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dirty = *map++;
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else
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dirty >>= 1;
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ino++;
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if ((dirty & 1) == 0)
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continue;
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/*
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* Skip directory inodes deleted and maybe reallocated
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*/
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dp = getino(ino);
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if ((dp->di_mode & IFMT) != IFDIR)
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continue;
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dumpino(dp, ino);
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}
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msg("dumping (Pass IV) [regular files]\n");
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for (map = dumpinomap, ino = 0; ino < maxino; ) {
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if ((ino % NBBY) == 0)
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dirty = *map++;
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else
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dirty >>= 1;
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ino++;
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if ((dirty & 1) == 0)
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continue;
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/*
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* Skip inodes deleted and reallocated as directories.
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*/
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dp = getino(ino);
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if ((dp->di_mode & IFMT) == IFDIR)
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continue;
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dumpino(dp, ino);
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}
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spcl.c_type = TS_END;
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#ifndef RDUMP
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for (i = 0; i < ntrec; i++)
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writeheader(maxino);
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#endif
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if (pipeout)
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msg("DUMP: %ld tape blocks\n",spcl.c_tapea);
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else
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msg("DUMP: %ld tape blocks on %d volumes(s)\n",
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spcl.c_tapea, spcl.c_volume);
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msg("DUMP IS DONE\n");
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putdumptime();
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#ifndef RDUMP
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if (!pipeout) {
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close(tapefd);
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trewind();
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}
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#else
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for (i = 0; i < ntrec; i++)
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writeheader(curino);
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trewind();
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#endif
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broadcast("DUMP IS DONE!\7\7\n");
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Exit(X_FINOK);
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/* NOTREACHED */
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}
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void
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sigAbort()
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{
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if (pipeout)
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quit("Unknown signal, cannot recover\n");
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msg("Rewriting attempted as response to unknown signal.\n");
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fflush(stderr);
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fflush(stdout);
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close_rewind();
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exit(X_REWRITE);
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}
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void sighup(){ msg("SIGHUP() try rewriting\n"); sigAbort();}
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void sigtrap(){ msg("SIGTRAP() try rewriting\n"); sigAbort();}
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void sigfpe(){ msg("SIGFPE() try rewriting\n"); sigAbort();}
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void sigbus(){ msg("SIGBUS() try rewriting\n"); sigAbort();}
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void sigsegv(){ msg("SIGSEGV() ABORTING!\n"); abort();}
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void sigalrm(){ msg("SIGALRM() try rewriting\n"); sigAbort();}
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void sigterm(){ msg("SIGTERM() try rewriting\n"); sigAbort();}
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char *
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rawname(cp)
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char *cp;
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{
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static char rawbuf[32];
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char *rindex();
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char *dp = rindex(cp, '/');
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if (dp == 0)
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return (0);
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*dp = 0;
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strcpy(rawbuf, cp);
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*dp = '/';
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strcat(rawbuf, "/r");
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strcat(rawbuf, dp+1);
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return (rawbuf);
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}
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