PING_CMD
if (CHECK_FAIL(system(PING_CMD)))
CHECK_FAIL(system(PING_CMD));
CHECK_FAIL(system(PING_CMD));
CHECK_FAIL(system(PING_CMD));
CHECK_FAIL(system(PING_CMD));
CHECK_FAIL(system(PING_CMD));
if (CHECK(!system(PING_CMD), "ping_fail",
if (CHECK(!system(PING_CMD), "ping_fail",
if (CHECK(system(PING_CMD), "ping_ok", "ping failed\n"))
if (CHECK(!system(PING_CMD), "ping_fail",
if (CHECK(system(PING_CMD), "ping_ok", "ping failed\n"))
CHECK_FAIL(system(PING_CMD));
err = SYS_NOFAIL(PING_CMD);
err = SYS_NOFAIL(PING_CMD);
err = SYS_NOFAIL(PING_CMD);
err = SYS_NOFAIL(PING_CMD);
err = SYS_NOFAIL(PING_CMD);
err = SYS_NOFAIL(PING_CMD);