This appendix describes the protocol components and directives. The RCGI protocol establishes a conversation between an RCGI client and an RCGI server. Directives are not case sensitive and must begin at the first character of each input line.
Some directives require space-separated arguments.
Directives Commands are sent to the server as directives that force the server connection through a set of simple states. The ENV directive marks the beginning of the transmission of environment variables. The list is terminated by a single line containing a period. The CMD directive sends commands and arguments. The command, with a full or partial path, is sent along with optional arguments.