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

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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;
}