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       gtalkd - GNU talk daemon


       gtalkd [ -bfghsStv --version ]


       gtalkd  is a talk daemon which is fully compatible with ntalkd which is
       the BSD talk daemon.  gtalkd provides a talk service via the  internet.
       A user may use a talk client to send a UDP message to gtalkd which will
       then  provide  the  services  of  storing   invitations,   and   making
       announcements to a user’s terminal.

       Command line switches are:

       -b, --bsd
              Emulate  the BSD post 4.2 talk protocol by not accepting any GNU
              talk protocol extensions.

       -f, --forever
              Open a socket and loop on  it  forever.   Unlike  running  under
              inetd   during  which  stdin  and  stdout  provides  the  socket
              necessary for communication, this option lets  the  talk  daemon
              run as a separate self supporting process.

       -g, --gnu
              Run  using  the  GNU  talk  protocol  extensions.   This  is the

       -h, --help
              Print process help.

       -s, --sun
              Simulate the pre BSD 4.2 talk protocol which is  commonly  found
              on SunOS and Solaris.

       -S, --sunforward
              This  option  is run as an extended option for the --sun option.
              Instead of acting  as  a  daemon  and  answering  requests,  all
              requests  are  sent  to  the n/gtalk daemon on the same machine.
              Answers are received and forwarded back the the requester.

       -t, --tty
              Send all error and verbose messages to the controlling TTY.   In
              addition,  create and bind the correct socket by hand instead of
              inheriting it through stdin and stdout.

       -v, --verbose
              Print out verbose information, or verbose syslog information.

              Print out the current version of gtalkd.


       The GNU talk daemon can be placed in a system bin such as /usr/sbin  or
       /usr/local/sbin  and  then installed in the inetd.conf file in place of
       the normal talk  daemon  which  may  be  found  there.   The  resulting
       configuration in inetd.conf should contain the following lines:

       talk dgram udp wait root /usr/sbin/tcpd /sbin/gtalkd -Ss

       ntalk dgram udp wait root /usr/sbin/tcpd /sbin/gtalkd

       In  addition,  if you are installing on SunOS or Solaris, you will have
       to make it aware of the  ntalk  service.   This  service  is  found  in
       /etc/services.  Simply find the line which says:

       talk      517/udp

       and add the line

       ntalk          518/udp

       right after it.


              Contains  definitions  for  the  Internet  Super Server to start

              This file contains  information  relating  names  socket/service
              information  to  names.   It  is used to determine the "[n]talk"
              socket used when in forever mode.

              Accessing  /etc/passwd  in  the  usual  way  allows  gtalkd   to
              determine  a  users home directory to read their personal ringer
              file.  The ringer file allows gtalkd  to  forward  announcements
              directly to an interested process.

              Different  individuals  may  start applications which create and
              manage this file.  The file contains  a  UDP  socket  definition
              which  allows  gtalkd  to  automatically  pass  the announcement
              information directly to a process which cares.

              This is read by gtalkd to determine  of  a  pattern  matches  an
              incomming  call  for the callee.  If it does, then the requested
              response is returned.  A pattern is of the form

                         username@hostname DENY_METHOD

              The username is a string which must match the incomming caller’s
              id  exactly.   The  hostname  can be a substring of the caller’s
              host name to match.  One of username or hostname can  be  blank,
              which  conflicts  defaulting first to username only matches, and
              then to complete username,hostname combinations.

              Valid DENY_METHODS  are  ALLOW  ,  which  allows  a  pattern  to
              announce  to  you,  and NOT_HERE , which cause gtalkd to predent
              you are not logged on.  In  addition,  FAILED  sends  a  failure
              message,   and   PERMISSION_DENIED   pretends   that   you  have
              permissions turned off on your tty.   Lastly,  SELECTIVE_REFUSAL
              means  to  send  a  specific  message  back saying that you have
              chosen to specifically prevent that person from calling you.  If
              their  client  is  not GTALK compliant, then it is downgraded to

       /etc/utmp, /var/adm/utmp
              Different locations of utmp which contain login information  for
              different users.  This file is referenced to determine which TTY
              device to open in order to write an announcement message.

              Terminal devices users  are  attached  to.   These  devices  are
              opened in order to write an announcement message.


       Eric M Ludlam <>


       Report bugs to <>.  This system has never been tested in a
       high volume situation due to my limited resources.


       Copyright © 1995, 1996 Eric M. Ludlam Copyright © 1997   Free  Software


       The   newest   version   of  gtalkd  can  be  found  within  the  etalk
       distribution.  As of the writing of this manual, it  can  be  found  on*.tar.gz