ejecutar comado de pgpool y colocarle la contraseña en el la terminal

char* command = "psql -h localhost -p 9999 -U postgres -c \"select * from pg_stat_activity;\"";
    FILE *fp = popen(command, "r");
    if (fp == NULL) {
      //printf("Failed to run command\n" );
      exit(1);
    }