utility is a server which will send a message to users currently logged in to the system. This server invokes the
command to actually write the messages to the system.
The following option is available:
Do not become a daemon. This option is only available when
rpc.rwalld is not invoked by
Messages are sent to this server by the rwall(1) command. The rpc.rwalld daemon is normally invoked by inetd(8).
The rpc.rwalld utility uses an RPC protocol defined in /usr/include/rpcsvc/rwall.x.