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.\" Hey Emacs! This file is -*- nroff -*- source.
.\"
.\" Copyright 1993 Rickard E. Faith (faith@cs.unc.edu)
.\"
.\" Permission is granted to make and distribute verbatim copies of this
.\" manual provided the copyright notice and this permission notice are
.\" preserved on all copies.
.\"
.\" Permission is granted to copy and distribute modified versions of this
.\" manual under the conditions for verbatim copying, provided that the
.\" entire resulting derived work is distributed under the terms of a
.\" permission notice identical to this one.
.\"
.\" Since the Linux kernel and libraries are constantly changing, this
.\" manual page may be incorrect or out-of-date. The author(s) assume no
.\" responsibility for errors or omissions, or for damages resulting from
.\" the use of the information contained herein. The author(s) may not
.\" have taken the same level of care in the production of this manual,
.\" which is licensed free of charge, as they might when working
.\" professionally.
.\"
.\" Formatted or processed versions of this manual, if unaccompanied by
.\" the source, must acknowledge the copyright and authors of this work.
.\" Modified, 27 May 2004, Michael Kerrisk <mtk16@ext.canterbury.ac.nz>
.\" Added notes on capability requirements
.\"
.TH VHANGUP 2 2004-05-27 "Linux 2.6.6" "Linux Programmer's Manual"
.SH NAME
vhangup \- virtually hangup the current tty
.SH SYNOPSIS
.B #include <unistd.h>
.sp
.B int vhangup(void);
.SH DESCRIPTION
.B vhangup
simulates a hangup on the current terminal. This call arranges for other
users to have a \*(lqclean\*(rq tty at login time.
.SH "RETURN VALUE"
On success, zero is returned. On error, \-1 is returned, and
.I errno
is set appropriately.
.SH ERRORS
.TP
.B EPERM
The calling process has insufficient privilege to call
.BR vhangup ;
the
.B CAP_SYS_TTY_CONFIG
capability is required.
.SH "CONFORMING TO"
This call is Linux-specific, and should not be used in programs
intended to be portable.
.SH "SEE ALSO"
.BR capabilities (7),
.BR init (8)
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