#include "stdio.h"
#include "syscall.h"
#include "string.h"
int main(int argc, char** argv) {
   int arg_idx = 0;
   while(arg_idx < argc) {
      printf("argv[%d] is %s\n", arg_idx, argv[arg_idx]);
      arg_idx++;
   }
   int pid = fork();
   if (pid) {
      int delay = 900000;
      while(delay--);
      printf("\n      I`m father prog, my pid:%d, I will show process list\n", getpid()); 
      ps();
   } else {
      char abs_path[512] = {0};
      printf("\n      I`m child prog, my pid:%d, I will exec %s right now\n", getpid(), argv[1]); 
      if (argv[1][0] != '/') {
	 getcwd(abs_path, 512);
	 strcat(abs_path, "/");
	 strcat(abs_path, argv[1]);
	 execv(abs_path, argv);
      } else {
	 execv(argv[1], argv);	 
      }
   }
   while(1);
   return 0;
}