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NAME
       vhangup - virtually hangup the current tty


SYNOPSIS
       #include <unistd.h>

       int vhangup(void);


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)