#include <sys/types.h>
#include  <sys/stat.h>

main(int argc, char *argv[])
{
        int r;
        if(argc != 4) {
                printf("Usage : mknod fichier majeur mineur");
                exit(1);
        }
        r=mknod(argv[1], S_IFCHR|0777, makedev(atoi(argv[2]), atoi(argv[3])));
        if(r < 0) {
                perror("mknod");
                exit(1);
        }
}