Description

   Calling the gsignal function has one of the following results:

   o  If gsignal specifies a sig argument that is outside the range
      defined in the <signal.h> header file, then gsignal returns 0
      and sets errno to EINVAL.

   o  If signal, ssignal, or sigvec establishes SIG_DFL (default
      action) for the signal, then gsignal does not return. The
      image is exited with the OpenVMS error code corresponding to
      the signal.

   o  If signal, ssignal, or sigvec establishes SIG_IGN (ignore
      signal) as the action for the signal, then gsignal returns its
      argument, sig.

   o  signal, ssignal, or sigvec must be used to establish an action
      routine for the signal. That function is called and its return
      value is returned by gsignal.

   See the Error and Signal Handling chapter of the C RTL Reference
   Manual for more information.

   See also raise, signal, ssignal, and sigvec.