.\" Copyright 1993 Rickard E. Faith (faith@cs.unc.edu)
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.\" Modified, 27 May 2004, Michael Kerrisk <mtk.manpages@gmail.com>
.\"     Added notes on capability requirements
.\"
.TH VHANGUP 2 2016-03-15 "Linux" "Linux Programmer's Manual"
.SH NAME
vhangup \- virtually hangup the current terminal
.SH SYNOPSIS
.B #include <unistd.h>
.PP
.B int vhangup(void);
.PP
.in -4n
Feature Test Macro Requirements for glibc (see
.BR feature_test_macros (7)):
.in
.PP
.ad l
.BR vhangup ():
.nf
    Since glibc 2.21:
.\"		commit 266865c0e7b79d4196e2cc393693463f03c90bd8
        _DEFAULT_SOURCE
    In glibc 2.19 and 2.20:
        _DEFAULT_SOURCE || (_XOPEN_SOURCE && _XOPEN_SOURCE\ <\ 500)
    Up to and including glibc 2.19:
        _BSD_SOURCE || (_XOPEN_SOURCE && _XOPEN_SOURCE\ <\ 500)
.fi
.ad b
.SH DESCRIPTION
.BR vhangup ()
simulates a hangup on the current terminal.
This call arranges for other
users to have a \*(lqclean\*(rq terminal 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 init (1),
.BR capabilities (7)
.SH COLOPHON
This page is part of release 5.04 of the Linux
.I man-pages
project.
A description of the project,
information about reporting bugs,
and the latest version of this page,
can be found at
\%https://www.kernel.org/doc/man\-pages/.