NAME
ttyaction —
ttyaction utility function
LIBRARY
library “libutil”
SYNOPSIS
#include
<util.h>
int
ttyaction(char
*ttyname, char
*action, char
*username);
DESCRIPTION
Thettyaction()
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
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.