All arguments a first joined with a space character and CRLF is appended, this string is then sent to the command server. Obtain a response from the server. Upon success the most significant digit of the status code is returned. Upon failure, timeout etc., undef is returned. Retrieve one line, delimited by CRLF, from the remote server.
Returns undef upon failure.
Unget a line of text from the server. Returns a reference to a list containing the lines, or undef upon failure. All rights reserved.