text: #include "types.h"
  #include "stat.h"
  #include "user.h"
  
  #define FAIL_STATUS 0
  #define PASS_STATUS 1
  
  int
  main(int argc, char **argv)
  {
    int i;
  
    if(argc < 2){
      printf(2, "usage: kill pid...\n");
      exit(FAIL_STATUS);
    }
    for(i=1; i<argc; i++)
      kill(atoi(argv[i]));
    exit(PASS_STATUS);
  }
  