VHANGUP(2)

NAME
vhangup - virtually hangup the current tty

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” tty 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)