vhangup(2) - Linux manual page (original) (raw)

vhangup(2) System Calls Manual vhangup(2)

NAME top

   vhangup - virtually hangup the current terminal

LIBRARY top

   Standard C library (_libc_, _-lc_)

SYNOPSIS top

   **#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 top

   **vhangup**() simulates a hangup on the current terminal.  This call
   arranges for other users to have a “clean” terminal at login time.

RETURN VALUE top

   On success, zero is returned.  On error, -1 is returned, and _[errno](../man3/errno.3.html)_
   is set to indicate the error.

ERRORS top

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

STANDARDS top

   Linux.

SEE ALSO top

   [init(1)](../man1/init.1.html), [capabilities(7)](../man7/capabilities.7.html)

COLOPHON top

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Linux man-pages 6.10 2024-07-23 vhangup(2)

Pages that refer to this page:login(1), syscalls(2), capabilities(7), agetty(8)