VHANGUP(2)                                          Linux Programmer's Manual                                         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)

COLOPHON
       This page is part of release 3.25 of the Linux man-pages project.  A description of the project,  and  information  about
       reporting bugs, can be found at http://www.kernel.org/doc/man-pages/.



Linux                                                      2007-07-26                                                 VHANGUP(2)