sigpending(2)							 sigpending(2)

NAME
       sigpending - examine pending signals

SYNOPSIS
DESCRIPTION
       stores  the set of signals that are blocked from delivery and are pend‐
       ing to the calling thread, at the location pointed to by set.

RETURN VALUE
       Upon successful completion, returns 0. Otherwise −1 is returned and  is
       set to indicate the error.

ERRORS
       fails if the following condition is encountered:

       set	      points to an invalid address.  The reliable detection of
		      this error is implementation-dependent.

APPLICATION USAGE
   Threads Considerations
       The set of signals returned by is the union of the signals  pending  on
       the process and calling thread.	A signal may be pending on the process
       if all threads block the signal.

       The set of signals returned by is only advisory.	 Since	other  threads
       may  be	executing  at  the  time  of the call, a signal pending on the
       process may be delivered to a thread after this system call returns.

       For more information regarding signals and threads, refer to signal(5).

   LWP (Lightweight Processes) Considerations
       The set of signals returned by is the union of the signals  pending  on
       the process and calling LWP.

AUTHOR
       was derived from the IEEE POSIX 1003.1-1988 Standard.

SEE ALSO
       sigaction(2), sigsuspend(2), sigprocmask(2), sigsetops(3C), signal(5).

CHANGE HISTORY
       First release in Issue 3.

STANDARDS CONFORMANCE
       : AES, SVID3, XPG3, XPG4, FIPS 151-2, POSIX.1

								 sigpending(2)

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