76 lines
2.4 KiB
C
76 lines
2.4 KiB
C
/* $NetBSD: fixhdr.c,v 1.2 1994/11/20 20:54:56 deraadt Exp $ */
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/*
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* Copyright (c) 1993 Paul Kranenburg
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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 Paul Kranenburg.
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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 <stdio.h>
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#include <fcntl.h>
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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 fd;
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struct sun_magic {
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unsigned int a_dynamic:1;
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unsigned int a_toolversion:7;
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unsigned char a_machtype;
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#define SUN_MID_SPARC 3
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unsigned short a_magic;
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} sm;
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if (argc != 2) {
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fprintf(stderr, "Usage: fixhdr <bootfile>\n");
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exit(1);
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}
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if ((fd = open(argv[1], O_RDWR, 0)) < 0) {
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perror("open");
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exit(1);
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}
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if (read(fd, &sm, sizeof(sm)) != sizeof(sm)) {
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perror("read");
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exit(1);
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}
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sm.a_dynamic = 0;
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sm.a_toolversion = 1;
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sm.a_machtype = SUN_MID_SPARC;
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lseek(fd, 0, 0);
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if (write(fd, &sm, sizeof(sm)) != sizeof(sm)) {
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perror("write");
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exit(1);
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}
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(void)close(fd);
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return 0;
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}
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