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():
    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
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