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

long gethostid()
{
	FILE *f;
	long rv = 0;

	f = fopen("/etc/hostid", "reb");
	if (f) {
		if (fread(&rv, 4, 1, f) == 0) {
			rv = 0;
		}
		fclose(f);
	}

	return rv;
}