BSD 4_3_Net_2 release

[unix-history] / usr / src / sys / hp300 / stand / installboot.c

/*
* Copyright (c) 1980, 1986, 1990 The Regents of the University of California.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
*    notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
*    notice, this list of conditions and the following disclaimer in the
*    documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
*    must display the following acknowledgement:
*      This product includes software developed by the University of
*      California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
*    may be used to endorse or promote products derived from this software
*    without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
*      @(#)installboot.c       7.2 (Berkeley) 12/16/90
*/

#ifndef lint
char copyright[] =
"@(#) Copyright (c) 1980, 1986, 1990 The Regents of the University of California.\n\
All rights reserved.\n";
#endif /* not lint */

#ifndef lint
static char sccsid[] = "@(#)installboot.c       7.2 (Berkeley) 12/16/90";
#endif /* not lint */

#include "sys/param.h"
#include "ufs/fs.h"

char block[1024];
int maxbootsize = 16 * 7 * 512;         /* XXX */

/*
* HPs are a kludge.
* The boot program won't fit in the boot area of a file system so we
* have to place it outside the file systems.  By convention, this means
* that if the 'a' partition is being used for '/', it is offset one
* cylinder into the disk and the boot program goes into that one cylinder.
* Also by convention, the 'c' partition is defined to be the entire disk
* including this boot cylinder.  If these conventions are not adhered to,
* the potential for disaster is enormous.
*/
main(argc, argv)
       int argc;
       char *argv[];
{
       int ifd, ofd, len;
       char *dev, *standalonecode;
       int bsize = 1024;

       if (argc != 3)
               usage();
       dev = argv[2];
       len = strlen(dev);
       if (dev[len-1] != 'c')
               usage();
       standalonecode = argv[1];
       ifd = open(standalonecode, 0);
       if (ifd < 0) {
               perror(standalonecode);
               exit(1);
       }
       ofd = open(dev, 1);
       if (ofd < 0) {
               perror(dev);
               exit(1);
       }
       while ((len = read(ifd, block, bsize)) > 0) {
               if ((maxbootsize -= bsize) < 0) {
                       printf("%s: too big\n", standalonecode);
                       exit(2);
               }
               if (len < bsize)
                       bzero(&block[len], bsize-len);
               if (write(ofd, block, bsize) != bsize) {
                       perror(dev);
                       exit(2);
               }
       }
       if (len < 0) {
               perror(standalonecode);
               exit(2);
       }
       exit(0);
}

usage()
{
       printf("Usage: installboot bootprog device\n");
       printf("where:\n");
       printf("\t\"bootprog\" is a LIF format file < %d bytes long\n",
              maxbootsize);
       printf("\t\"device\" must be the 'c' partition of a bootable disk\n");
       printf("WARNING!!  If the 'c' partition contains a file system, %s\n",
              "DON'T RUN THIS!!");
       exit(1);
}