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talkd(1M) talkd(1M)

NAME

talkd - remote user communication server

SYNOPSIS

talkd

DESCRIPTION

Talkd is the server that notiﬁes a user that someone wants to initiate a conversation. It acts as a reposi-

tory of invitations, responding to requests by clients wishing to initiate a conversation. To initiate a conver-

sation, the client (the talk command) sends a message of type LOOK_UP to the server (see

/usr/include/protocols/talkd.h). This causes the server to search its invitation table to check

if an invitation currently exists for the caller to talk to the callee speciﬁed in the message. If the lookup

fails, the caller then sends a message of type ANNOUNCE, which causes the server to display an announce-

ment on the callee’s terminal 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 pro-

grams establish a stream connection through which the conversation takes place.

To activate the talk service, the following entry must be added to the /etc/inetd.conf ﬁle:

ntalk dgram udp wait root /usr/lbin/ntalkd ntalkd