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():

    Since glibc 2.21:


        _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)

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¶

init(1), capabilities(7)

COLOPHON¶

This page is part of release 4.15 of the Linux 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/.