337 lines
10 KiB
C
337 lines
10 KiB
C
/* $NetBSD: installboot.c,v 1.6 2001/02/19 22:48:58 cgd Exp $ */
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/*
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* Copyright (c) 1999 Ross Harvey. 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 Ross Harvey
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* for the NetBSD Project.
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* 4. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* Copyright (c) 1999 Christopher G. Demetriou. 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 Christopher G. Demetriou
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* for the NetBSD Project.
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* 4. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/param.h> /* XXX for roundup, howmany */
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#include <sys/stat.h>
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#include <sys/disklabel.h>
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#include <sys/endian.h>
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#include <isofs/cd9660/iso.h>
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#include <assert.h>
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#include <err.h>
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#include <fcntl.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include <unistd.h>
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#include <dev/dec/dec_boot.h>
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#include "installboot.h"
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static void usage(void);
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static void clr_bootstrap(const char *disk);
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static void set_bootstrap(const char *disk, const char *bootstrap);
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static void set_sunsum(struct pmax_boot_block *bb);
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int verbose, nowrite, append, isoblock, sunsum;
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struct stat disksb;
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static void
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usage()
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{
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fprintf(stderr, "usage:\n");
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fprintf(stderr, "\t%s [-nsv] [-i block | -a] disk bootstrap\n",
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getprogname());
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fprintf(stderr, "\t%s [-nsv] -c disk\n", getprogname());
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exit(EXIT_FAILURE);
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}
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int
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main(int argc, char **argv)
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{
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const char *disk, *bootstrap;
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int c, clearflag;
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clearflag = verbose = nowrite = append = isoblock = sunsum = 0;
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while ((c = getopt(argc, argv, "aci:nsv")) != -1) {
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switch (c) {
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case 'a':
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/* Append to disk (image) */
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append = 1;
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break;
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case 'c':
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/* Clear any existing boot block */
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clearflag = 1;
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break;
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case 'i':
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/* Load bootstrap at iso block number */
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if ((isoblock = atoi(optarg)) <= 0)
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errx(1, "%s: bad iso block number", optarg);
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break;
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case 'n':
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/* Do not actually write the boot file */
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nowrite = 1;
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break;
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case 's':
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/* Recompute the sun checksum */
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sunsum = 1;
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break;
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case 'v':
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/* Chat */
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verbose = 1;
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break;
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default:
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usage();
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}
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}
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argc -= optind;
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argv += optind;
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if ((clearflag && argc != 1) || (!clearflag && argc != 2))
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usage();
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if (append && isoblock)
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usage();
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disk = argv[0];
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bootstrap = argv[1]; /* NULL if argc == 1 */
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if (verbose) {
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fprintf(stderr, "disk: %s\n", disk);
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fprintf(stderr, "bootstrap: %s\n",
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bootstrap != NULL ? bootstrap : "to be cleared");
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if (sunsum){fprintf(stderr, "will restore sun checksum\n");}
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}
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if (sizeof (struct pmax_boot_block) != PMAX_BOOT_BLOCK_BLOCKSIZE)
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errx(EXIT_FAILURE,
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"boot_block structure badly sized (build error)");
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if (append) {
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/* Only append to a regular file */
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if (stat(disk, &disksb) == -1)
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err(EXIT_FAILURE, "stat %s", disk);
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if (!S_ISREG(disksb.st_mode))
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errx(EXIT_FAILURE, "%s must be a regular file to append to", bootstrap);
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}
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if (clearflag)
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clr_bootstrap(disk);
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else
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set_bootstrap(disk, bootstrap);
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exit(EXIT_SUCCESS);
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}
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static void
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clr_bootstrap(const char *disk)
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{
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struct pmax_boot_block bb;
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ssize_t rv;
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int diskfd;
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if ((diskfd = open(disk, nowrite ? O_RDONLY : O_RDWR)) == -1)
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err(EXIT_FAILURE, "open %s", disk);
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rv = pread(diskfd, &bb, sizeof bb, PMAX_BOOT_BLOCK_OFFSET);
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if (rv == -1)
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err(EXIT_FAILURE, "read %s", disk);
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else if (rv != sizeof bb)
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errx(EXIT_FAILURE, "read %s: short read", disk);
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if (htole32(bb.magic) != PMAX_BOOT_MAGIC) {
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fprintf(stderr, "old boot block magic number invalid (%#x)\n",
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bb.magic);
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fprintf(stderr, "boot block invalid\n");
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goto done;
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}
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bb.map[0].num_blocks = bb.map[0].start_block = bb.mode = 0;
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bb.magic = htole32(PMAX_BOOT_MAGIC);
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/* restore sun checksum */
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if (sunsum)
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set_sunsum(&bb);
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fprintf(stderr, "new boot block start sector: %#x\n",
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le32toh(bb.map[0].start_block));
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fprintf(stderr, "new boot block size: %#x\n",
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le32toh(bb.map[0].num_blocks));
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if (nowrite) {
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if (verbose)
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fprintf(stderr, "not writing\n");
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goto done;
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}
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if (verbose)
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fprintf(stderr, "writing\n");
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rv = pwrite(diskfd, &bb, sizeof bb, PMAX_BOOT_BLOCK_OFFSET);
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if (rv == -1)
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err(EXIT_FAILURE, "write %s", disk);
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else if (rv != sizeof bb)
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errx(EXIT_FAILURE, "write %s: short write", disk);
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done:
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(void)close(diskfd);
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}
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static void
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set_bootstrap(const char *disk, const char *bootstrap)
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{
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struct stat bootstrapsb;
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struct pmax_boot_block bb;
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int diskfd, startblock;
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char *bootstrapbuf;
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size_t bootstrapsize;
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u_int32_t bootstrapload, bootstrapexec;
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ssize_t rv;
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/* Open the input file and check it out */
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if (stat(bootstrap, &bootstrapsb) == -1)
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err(EXIT_FAILURE, "stat %s", bootstrap);
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if (!S_ISREG(bootstrapsb.st_mode))
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errx(EXIT_FAILURE, "%s must be a regular file", bootstrap);
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load_bootstrap(bootstrap, &bootstrapbuf, &bootstrapload, &bootstrapexec,
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&bootstrapsize);
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if ((diskfd = open(disk, nowrite ? O_RDONLY : O_RDWR)) == -1)
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err(EXIT_FAILURE, "open %s", disk);
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rv = pread(diskfd, &bb, sizeof bb, PMAX_BOOT_BLOCK_OFFSET);
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if (rv == -1)
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err(EXIT_FAILURE, "read %s", disk);
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else if (rv != sizeof bb)
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errx(EXIT_FAILURE, "read %s: short read", disk);
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/* fill in the updated boot block fields */
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if (append) {
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startblock = howmany(disksb.st_size, PMAX_BOOT_BLOCK_BLOCKSIZE);
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} else if (isoblock) {
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startblock = isoblock * (ISO_DEFAULT_BLOCK_SIZE / PMAX_BOOT_BLOCK_BLOCKSIZE);
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} else {
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startblock = PMAX_BOOT_BLOCK_OFFSET / PMAX_BOOT_BLOCK_BLOCKSIZE + 1;
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}
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bb.map[0].start_block = htole32(startblock);
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bb.map[0].num_blocks = htole32(howmany(bootstrapsize, PMAX_BOOT_BLOCK_BLOCKSIZE));
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bb.magic = htole32(PMAX_BOOT_MAGIC);
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bb.load_addr = htole32(bootstrapload);
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bb.exec_addr = htole32(bootstrapexec);
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bb.mode = htole32(PMAX_BOOTMODE_CONTIGUOUS);
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/* restore sun checksum */
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if (sunsum)
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set_sunsum(&bb);
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if (verbose) {
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fprintf(stderr, "bootstrap starting sector: %i\n",
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le32toh(bb.map[0].start_block));
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fprintf(stderr, "bootstrap sector count: %i\n",
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le32toh(bb.map[0].num_blocks));
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fprintf(stderr, "bootstrap load address: %#x\n",
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le32toh(bb.load_addr));
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fprintf(stderr, "bootstrap execute address: %#x\n",
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le32toh(bb.exec_addr));
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}
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if (nowrite) {
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if (verbose)
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fprintf(stderr, "not writing\n");
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goto done;
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}
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if (verbose)
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fprintf(stderr, "writing bootstrap\n");
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rv = pwrite(diskfd, bootstrapbuf, bootstrapsize,
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startblock * PMAX_BOOT_BLOCK_BLOCKSIZE);
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if (rv == -1)
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err(EXIT_FAILURE, "write %s", disk);
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else if (rv != bootstrapsize)
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errx(EXIT_FAILURE, "write %s: short write", disk);
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if (verbose)
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fprintf(stderr, "writing boot block\n");
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rv = pwrite(diskfd, &bb, sizeof bb, PMAX_BOOT_BLOCK_OFFSET);
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if (rv == -1)
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err(EXIT_FAILURE, "write %s", disk);
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else if (rv != sizeof bb)
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errx(EXIT_FAILURE, "write %s: short write", disk);
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done:
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(void)close(diskfd);
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}
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static void
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set_sunsum(struct pmax_boot_block *bb)
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{
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u_int16_t *sp, sum;
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sp = (u_int16_t *)bb;
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sum = 0;
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while (sp < (u_int16_t *)((bb)+1) - 1) {
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sum ^= *sp++; /* XXX no need to ntohs/htons for XOR */
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}
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sp = (u_int16_t *)bb;
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#define bb_sunsum sp[PMAX_BOOT_BLOCK_BLOCKSIZE/2 - 1]
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if (verbose) {
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fprintf(stderr,"old sun checksum: 0x%04x\n",be16toh(bb_sunsum));
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fprintf(stderr,"recalculated sun checksum: 0x%04x\n",be16toh(sum));
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}
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bb_sunsum = sum;
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}
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