/*  * mysplit.c - Another handy routine for testing your tiny shell *  * usage: mysplit <n> * Fork a child that spins for <n> seconds in 1-second chunks. */#include <stdio.h>#include <unistd.h>#include <stdlib.h>#include <sys/types.h>#include <sys/wait.h>#include <signal.h>int main(int argc, char **argv) {    int i, secs;    if (argc != 2) {	fprintf(stderr, "Usage: %s <n>\n", argv[0]);	exit(0);    }    secs = atoi(argv[1]);    if (fork() == 0) { /* child */	for (i=0; i < secs; i++)	    sleep(1);	exit(0);    }    /* parent waits for child to terminate */    wait(NULL);    exit(0);}