Re: [LIP] how to find boot loader installed on m/c ? - LILO/grub?

On Thu, Nov 06, 2003 at 05:39:51PM +0530, Ritesh Bharati wrote:
> hi,
> On my m/c  (fedora test3) i have both rpm packages installed, so rpm -qa 
> witll not help. But yes i have /etc/lilo.conf.anaconda file and my 
> bootloader is grub.
> This test might do. Is any other way?? Any entry in MBR ..:).

Sigh. On a programming list, a program solution.

This program seems to detect all LILO installations for me. I don't have
a GRUB installation to check, however.

Usage:

1. Save the code into bootloader.c
2. Compile it - make bootloader
3. Run it - ./bootloader /dev/hda (use your disk here)

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <fcntl.h>

int main(int argc, char **argv) {
	char *dev = argv[1];
	char buf[4];
	int fd;
	fd = open (dev, O_RDONLY);
	if (fd < 0) {
		perror ("open");
		exit (1);
	}
	if (lseek (fd, 6, SEEK_SET) < 0) {
		perror ("lseek");
		exit (1);
	}
	if (read (fd, buf, 4) != 4) {
		perror ("read");
		exit (1);
	}
	if (buf[0] == 0x4c && buf[1] == 0x49 && buf[2] == 0x4c && buf[3] == 0x4f) {
		printf ("Boot Loader is LILO\n");
	} else {
		printf ("Other Boot Loader - Possibly Grub\n");
	}
	close(fd);
	return 0;
}

Binand

PS: How did I know? I ran xxd /dev/hda and looked for tell-tale signs.

-- 
Russian Roulette with Unix:
while :; do kill $RANDOM &> /dev/null && break || sleep 1; done


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