HELPLIB.HLB  —  CRTL  sigsetmask
    Establishes those signals that are blocked from delivery.

    Format

      #include  <signal.h>

      int sigsetmask  (int mask);

1  –  Argument

 mask

    The signals to be blocked.

2  –  Description

    See the sigblock function for information about the mask
    argument.

3  –  Return Value

    x                  The previous set of masked signals.
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