6.5.2 UUCP Protocol Commands

Each protocol supports a method for sending a command to the remote system. This method is used to transmit a series of commands between the two UUCP packages. At all times, one package is the master and the other is the slave. Initially, the calling UUCP is the master.

If a protocol error occurs during the exchange of commands, both sides move immediately to the final handshake.

The master will send one of five commands: `S', `R', `X', `E', or `H'.

Any file name referred to below is either an absolute file name beginning with `/', a public directory file name beginning with `~/', a file name relative to a user's home directory beginning with `~USER/', or a spool directory file name. File names in the spool directory are not absolute, but instead are converted to file names within the spool directory by UUCP. They always begin with `C.' (for a command file created by uucp or uux), `D.' (for a data file created by uucp, uux or by an execution, or received from another system for an execution), or `X.' (for an execution file created by uux or received from another system).

6.5.2.1 The S Command
6.5.2.2 The R Command
6.5.2.3 The X Command
6.5.2.4 The E Command
6.5.2.5 The H Command