Here are the Perl functions, listed alphabetically.
Returns the absolute value of VALUE. VALUE can be a number (such as -7), or an expression (such as int(5/2)).
accept NEWSOCKET, GENERICSOCKET
accept is used to accept an incoming socket connection. If the connection is successful, the packed address is returned, otherwise, FALSE is returned. Identical to the accept(2) system call.
The alarm function sends a SIGALRM to the program after the number of seconds specified in SECONDS has elapsed. Only one timer can be running at a time, so if you call this function and a timer is already running, it will be replaced by the more recent call. Calling this function with ...