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SIGPENDING(2)		   Linux Programmer's Manual		 SIGPENDING(2)

NAME
       sigpending - examine pending signals

SYNOPSIS
       #include <signal.h>

       int sigpending(sigset_t *set);

   Feature Test Macro Requirements for glibc (see feature_test_macros(7)):

       sigpending(): _POSIX_C_SOURCE >= 1 || _XOPEN_SOURCE || _POSIX_SOURCE

DESCRIPTION
       sigpending()  returns  the set of signals that are pending for delivery
       to the calling thread (i.e., the signals which have been	 raised	 while
       blocked).  The mask of pending signals is returned in set.

RETURN VALUE
       sigpending() returns 0 on success and -1 on error.

ERRORS
       EFAULT set  points  to  memory which is not a valid part of the process
	      address space.

CONFORMING TO
       POSIX.1-2001.

NOTES
       See sigsetops(3) for details on manipulating signal sets.

       The set of signals that is pending for a thread is the union of the set
       of  signals that is pending for that thread and the set of signals that
       is pending for the process as a whole; see signal(7).

       A child created via fork(2) initially has an empty pending signal  set;
       the pending signal set is preserved across an execve(2).

BUGS
       In  versions  of glibc up to and including 2.2.1, there is a bug in the
       wrapper function for sigpending() which means  that  information	 about
       pending real-time signals is not correctly returned.

SEE ALSO
       kill(2), sigaction(2), signal(2), sigprocmask(2), sigsuspend(2), sigseā€
       tops(3), signal(7)

COLOPHON
       This page is part of release 3.22 of the Linux  man-pages  project.   A
       description  of	the project, and information about reporting bugs, can
       be found at http://www.kernel.org/doc/man-pages/.

Linux				  2008-10-04			 SIGPENDING(2)
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