vhangup(2)                 DG/UX 4.30                  vhangup(2)



     NAME
          vhangup - Virtually hang up the current control terminal.

     SYNOPSIS
          void   vhangup  ( )

     PARAMETERS
          None.

     DESCRIPTION
          This function provides capabilities that are inherently
          implementation dependent.  It may change or cease to exist
          in the future.

          Vhangup revokes read and write access to the calling
          process's controlling terminal for all processes (including
          the calling process).  Further attempts to access this
          terminal will cause I/O errors (EBADF).  If the subject
          terminal has a process group associated with it, a hangup
          signal (SIGHUP) is sent to that process group.

     ACCESS CONTROL
          The calling process's effective user id must be superuser.

     RETURN VALUE
          None.

     EXCEPTIONS
          None.

     SEE ALSO
          The related manual section:  init(8).























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