119 lines
3.9 KiB
C
119 lines
3.9 KiB
C
/*
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* Copyright (c) 1980, 1986, 1990 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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* from: @(#)installboot.c 7.2 (Berkeley) 12/16/90
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* $Id: installboot.c,v 1.2 1993/05/22 07:59:00 cgd Exp $
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*/
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#ifndef lint
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char copyright[] =
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"Copyright (c) 1980, 1986, 1990 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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/* from: static char sccsid[] = "@(#)installboot.c 7.2 (Berkeley) 12/16/90"; */
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static char rcsid[] = "$Id: installboot.c,v 1.2 1993/05/22 07:59:00 cgd Exp $";
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#endif /* not lint */
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#include "sys/param.h"
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#include "ufs/fs.h"
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char block[1024];
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int maxbootsize = 16 * 7 * 512; /* XXX */
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/*
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* HPs are a kludge.
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* The boot program won't fit in the boot area of a file system so we
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* have to place it outside the file systems. By convention, this means
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* that if the 'a' partition is being used for '/', it is offset one
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* cylinder into the disk and the boot program goes into that one cylinder.
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* Also by convention, the 'c' partition is defined to be the entire disk
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* including this boot cylinder. If these conventions are not adhered to,
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* the potential for disaster is enormous.
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*/
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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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int ifd, ofd, len;
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char *dev, *standalonecode;
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int bsize = 1024;
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if (argc != 3)
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usage();
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dev = argv[2];
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len = strlen(dev);
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if (dev[len-1] != 'c')
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usage();
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standalonecode = argv[1];
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ifd = open(standalonecode, 0);
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if (ifd < 0) {
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perror(standalonecode);
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exit(1);
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}
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ofd = open(dev, 1);
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if (ofd < 0) {
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perror(dev);
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exit(1);
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}
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while ((len = read(ifd, block, bsize)) > 0) {
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if ((maxbootsize -= bsize) < 0) {
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printf("%s: too big\n", standalonecode);
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exit(2);
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}
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if (len < bsize)
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bzero(&block[len], bsize-len);
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if (write(ofd, block, bsize) != bsize) {
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perror(dev);
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exit(2);
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}
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}
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if (len < 0) {
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perror(standalonecode);
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exit(2);
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}
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exit(0);
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}
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usage()
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{
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printf("Usage: installboot bootprog device\n");
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printf("where:\n");
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printf("\t\"bootprog\" is a LIF format file < %d bytes long\n",
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maxbootsize);
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printf("\t\"device\" must be the 'c' partition of a bootable disk\n");
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printf("WARNING!! If the 'c' partition contains a file system, %s\n",
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"DON'T RUN THIS!!");
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exit(1);
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}
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