Shell Programming and Scripting

#include <stdlib.h> 
#include <stdio.h> 
#include <string.h> 
#include <errno.h> 
#include <unistd.h> 
 
#include "rutines.h" 
 
int main(int argc, char *argv[]) 
{ 
    char cmd[256]; 
    int a; 
     
    if (argc<2) 
        Error("Insufficient arguments: exec_in <sec> <cmd> [args...]"); 
         
    sleep(atoi(argv[1])); 
     
    cmd[0]='\0'; 
    for(a=2;a<argc;a++) 
    { 
        strcat(cmd,argv[a]); 
        strcat(cmd," "); 
    } 
     
    system(cmd); 
         
    exit(0); 
}