vhangup(2) System Calls Manual vhangup(2)
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 ar-
ranges 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
This call is Linux-specific, and should not be used in programs in-
tended to be portable.
SEE ALSO
init(1), capabilities(7)
Linux man-pages 6.03 2022-10-30 vhangup(2)
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