Manual page for VHANGUP(2)
vhangup - virtually ``hangup'' the current control terminal
SYNOPSIS
vhangup()
DESCRIPTION
Vhangup
is used by the initialization process
init.8
(among others) to arrange that users are given
``clean''' terminals at login,
by revoking access of the previous users' processes to the terminal.
To effect this,
vhangup
searches the system tables for references to the control terminal
of the invoking process, revoking access permissions
on each instance of the terminal that it finds.
Further attempts to access the terminal by the affected processes
will yield i/o errors (EBADF).
Finally,
a hangup signal (SIGHUP) is sent to the process group of the
control terminal.
SEE ALSO
init (8)
BUGS
Access to
the control terminal via
/dev/tty
is still possible.
This call should be replaced by an automatic mechanism that
takes place on process exit.
Created by unroff & hp-tools.
© somebody (See intro for details). All Rights Reserved.
Last modified 11/5/97
