SIGPENDING(2) BSD System Calls Manual SIGPENDING(2)
sigpending -- get pending signals
The sigpending function returns a mask of the signals pending for deliv-
ery to the calling process in the location indicated by set. Signals may
be pending because they are currently masked, or transiently before
delivery (although the latter case is not normally detectable).
Upon successful completion, the value 0 is returned; otherwise the
value -1 is returned and the global variable errno is set to indicate the
The sigpending function does not currently detect any errors.
sigaction(2), sigprocmask(2), sigsetops(3)
The sigpending function is defined by IEEE Std 1003.1-2008 (``POSIX.1'').
BSD March 30, 2017 BSD