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vhangup

Section: System Calls (2)
Updated: 202-0-08
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NAME

vhangup - virtually hangup the current terminal

LIBRARY

Standard C library (libc,~-lc)

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 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.