berk_sigpause(2)                 DG/UX 5.4.2                berk_sigpause(2)


NAME
       berksigpause - set blocked signals and suspend process until a
       signal is caught

SYNOPSIS
       #include <sys/signal.h>

       int  berksigpause (signalmask)
       int  signalmask;

   where:
       signalmask    Set of signals to be blocked while waiting

DESCRIPTION
       Berksigpause assigns the set of signals specified in signalmask to
       the set of signals blocked from presentation and then suspends the
       calling process until it is presented with a signal that is set to be
       caught.  Changing the signal mask may cause previously pended signals
       to be presented immediately.

       Neither the presentation of signals that are ignored, nor the
       presentation of signals that cause the termination of the calling
       process, nor the existence of pended signals cause berksigpause to
       return.

       When a signal is caught by the calling process and control is
       returned from the signal handler, berksigpause returns.  On return,
       the previous set of signals blocked from presentation is restored.

       Signal "s" is represented by the value "SIGBIT(s)" in signalmask.

       It is not possible to block SIGKILL or SIGSTOP.  It may or may not be
       possible to block signals that are not defined by the system.  An
       attempt to block these signals will not produce an error.

ACCESS CONTROL
       None.

RETURN VALUE
       -1     An error occurred.  errno is set to indicate the error.

DIAGNOSTICS
       Errno may be set to one of the following error codes:

       EINTR     A signal interrupted the berksigpause operation.

SEE ALSO
       sigblock(2), sigpause(2), sigvec(2).









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