script linux ejecutar comando y password

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

#define PASSWORD "kle"

int verify_password(char *pass) {
  int auth_flag = 0;
  char password_buffer[16];
  strcpy(password_buffer, pass);

  if(strcmp(password_buffer, PASSWORD) == 0)
  {
    auth_flag = 1;
  }
  return auth_flag;
}

int main(int argc, char *argv[]) {
  if(argc < 2)
  {
    printf("Usage: %s <password>\n", argv[0]);
    exit(0);
  }
  if(verify_password(argv[1]))
  {
    printf("\n-=-=-=-=-=-=-=-=-=-=-=-=-=-\n");
    printf("      Access Granted.\n");
    printf("-=-=-=-=-=-=-=-=-=-=-=-=-=-\n");
  }
  else