.\" 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 4.15 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/.