sigpending(2)							System Calls Manual						     sigpending(2)

NAME

       sigpending - examine pending signals

SYNOPSIS

DESCRIPTION

       stores the set of signals that are blocked from delivery and are pending 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)