Hi, in man 2 gettimeofday (2009-03-25), section DESCRIPTION, it is said: "If either tv or tz is NULL, ..." However, if the first arg is NULL, the compiler (gcc 4.3.4) issues a warning that it shouldn't be NULL. Felix -- To unsubscribe from this list: send the line "unsubscribe linux-man" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html