NAME¶

vhangup - virtually hangup the current terminal

LIBRARY¶

Standard C library (libc, -lc)

SYNOPSIS¶

#include <unistd.h>

int vhangup(void);

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 to indicate the error.

ERRORS¶

EPERM

The calling process has insufficient privilege to call vhangup(); the CAP_SYS_TTY_CONFIG capability is required.

STANDARDS¶

Linux.

SEE ALSO¶

init(1), capabilities(7)