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 3.23 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/.