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CentOS 7.0 - man page for vhangup (centos section 2)

VHANGUP(2)						     Linux Programmer's Manual							VHANGUP(2)

NAME
vhangup - virtually hangup the current terminal
SYNOPSIS
#include <unistd.h> int vhangup(void); Feature Test Macro Requirements for glibc (see feature_test_macros(7)): vhangup(): _BSD_SOURCE || (_XOPEN_SOURCE && _XOPEN_SOURCE < 500)
DESCRIPTION
vhangup() simulates a hangup on the current terminal. This call arranges for other users to have a "clean" terminal at login time.
RETURN VALUE
On success, zero is returned. On error, -1 is returned, and errno is set appropriately.
ERRORS
EPERM The calling process has insufficient privilege to call vhangup(); the CAP_SYS_TTY_CONFIG capability is required.
CONFORMING TO
This call is Linux-specific, and should not be used in programs intended to be portable.
SEE ALSO
capabilities(7), init(8)
COLOPHON
This page is part of release 3.53 of the Linux man-pages project. A description of the project, and information about reporting bugs, can be found at http://www.kernel.org/doc/man-pages/. Linux 2007-07-26 VHANGUP(2)