53 lines
858 B
Plaintext
53 lines
858 B
Plaintext
/*
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fixbs
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-----
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Fix bootsector of an mformat-ed hard drive FAT partition.
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Gilbert Ramirez
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Technical Services
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University Health System
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$Id: ramirez.fixbs,v 1.1.1.1 2002/08/14 22:27:25 dan Exp $
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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int main(int argc, char **argv)
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{
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char *device;
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int fd;
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char jmp[2] = { 0x3c, 0x90 };
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char dirlen[2] = { 0x00, 0x02 };
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if (argc != 2) {
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fprintf(stderr, "\nusage: %s device\n"
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"\tFixes boot sector on device\n", argv[0]);
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exit(-1);
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}
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device = argv[1];
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if ((fd = open(device, O_WRONLY)) < 0) {
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fprintf(stderr, "%s: couldn't open %s for writing\n", argv[0],
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device);
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exit(-1);
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}
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lseek(fd, 1, SEEK_SET);
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write(fd, jmp, 2);
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lseek(fd, 0x11, SEEK_SET);
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write(fd, dirlen, 2);
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close(fd);
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return 0;
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}
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