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TTYACTION(3)               Library Functions Manual               TTYACTION(3)

NAME
     ttyaction - ttyaction utility function

LIBRARY
     System Utilities Library (libutil, -lutil)

SYNOPSIS
     #include <util.h>

     int
     ttyaction(char *ttyname, char *action, char *username);

DESCRIPTION
     The ttyaction() function is used by login(1), getty(8), telnetd(8) and
     rlogind(8) to execute site-specific commands when a login session begins
     and ends.

     The ttyaction() function scans the /etc/ttyaction file for any records
     that match the current ttyname and action parameters, and for each
     matching record, runs the shell command shown in that record.  The record
     format is described in ttyaction(5).  The parameter username is the name
     of the new owner of the ttyname device.  Note that the ttyname parameter
     may be passed as a fully qualified pathname, and the ttyaction() function
     will skip the leading "/dev/" part of the string.  (This is a convenience
     for login and getty.)

RETURN VALUES
     ttyaction() returns the status of the last command it executed, or zero
     if no matching commands were found.

FILES
     /dev/*
     /etc/ttyaction

SEE ALSO
     ttyaction(5)

HISTORY
     The ttyaction() function appeared in NetBSD 1.3.

AUTHORS
     Gordon W. Ross <gwr@NetBSD.org>,
     Chris G. Demetriou <cgd@NetBSD.org>,
     Ty Sarna <tsarna@NetBSD.org>.

BUGS
     There should be some other mechanism to allow selection of different
     access control policies on a per-line basis.  It has been suggested that
     the same ttyaction() mechanism should also be used for determining access
     control, but it was decided (after much discussion) that ttyaction()
     should only describe actions to be performed after the system has decided
     to change the ownership of some tty.  Access control policies will be
     handled by a separate mechanism.

NetBSD 10.99                      May 4, 2010                     NetBSD 10.99