5.2.6 Player Input Handlers

$do_out_of_band_command

On any connection for which the connection-option disable-oob has not been set, any unflushed incoming lines that begin with the out-of-band prefix will be treated as out-of-band commands, meaning that if the verb $do_out_of_band_command() exists and is executable, it will be called for each such line. For more on this, see Out-of-band Processing.

$do_command

As we previously described in The Built-in Command Parser, on any logged-in connection that

• is not the subject of a read() call,
• does not have a .program command in progress, and
• has not had its connection option hold-input set,

any incoming line that

• has not been flushed
• is in-band (i.e., has not been consumed by out-of-band processing) and
• is not itself .program or one of the other four intrinsic commands

will result in a call to $do_command() provided that verb exists and is executable. If this verb suspends or returns a true value, then processing of that line ends at this point, otherwise, whether the verb returned false or did not exist in the first place, the remainder of the builtin parsing process is invoked.