TALKD(8) | System Manager's Manual | TALKD(8) |
talkd
— remote
user communication server
talkd |
The talkd
utility is the server that
notifies a user that someone else wants to initiate a conversation. It acts
as a repository of invitations, responding to requests by clients wishing to
rendezvous to hold a conversation. In normal operation, a client, the
caller, initiates a rendezvous by sending a CTL_MSG to the server of type
LOOK_UP (see
<protocols/talkd.h>
). This
causes the server to search its invitation tables to check if an invitation
currently exists for the caller (to speak to the callee specified in the
message).
If the lookup fails, the caller then sends an ANNOUNCE message causing the server to broadcast an announcement on the callee's login ports requesting contact.
When the callee responds, the local server uses the recorded invitation to respond with the appropriate rendezvous address and the caller and callee client programs establish a stream connection through which the conversation takes place.
The talkd
utility is managed by
launchd(8) as specified in the
ntalk.plist property list. By default the property
list contains the
Disabled
key set to true, so talkd
is never invoked.
Execute the following command as root to enable
talkd
:
launchctl load -w
/System/Library/LaunchDaemons/ntalk.plist
The talkd
utility appeared in
4.3BSD.
August 21, 2008 | macOS 14.6 |