NetBSD/sys/arch/sparc/stand/fixhdr.c

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1994-11-20 23:51:32 +03:00
/* $NetBSD: fixhdr.c,v 1.2 1994/11/20 20:54:56 deraadt Exp $ */
/*
* Copyright (c) 1993 Paul Kranenburg
* 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 Paul Kranenburg.
* 4. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
*/
1994-02-26 13:57:09 +03:00
#include <stdio.h>
#include <fcntl.h>
main(argc, argv)
int argc;
char *argv[];
{
int fd;
struct sun_magic {
unsigned int a_dynamic:1;
unsigned int a_toolversion:7;
unsigned char a_machtype;
#define SUN_MID_SPARC 3
unsigned short a_magic;
} sm;
if (argc != 2) {
fprintf(stderr, "Usage: fixhdr <bootfile>\n");
exit(1);
}
if ((fd = open(argv[1], O_RDWR, 0)) < 0) {
perror("open");
exit(1);
}
if (read(fd, &sm, sizeof(sm)) != sizeof(sm)) {
perror("read");
exit(1);
}
sm.a_dynamic = 0;
sm.a_toolversion = 1;
sm.a_machtype = SUN_MID_SPARC;
lseek(fd, 0, 0);
if (write(fd, &sm, sizeof(sm)) != sizeof(sm)) {
perror("write");
exit(1);
}
(void)close(fd);
return 0;
}