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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.  In the event of an
       error, errno is set to indicate the cause.

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.

       If  a  signal is	both blocked and has a disposition of "ignored", it is
       not added to the	mask of	pending	signals	when generated.

       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),	sigse-
       tops(3),	signal(7)

COLOPHON
       This page is part of release 3.74 of the	Linux  man-pages  project.   A
       description  of	the project, information about reporting bugs, and the
       latest	 version    of	  this	  page,	   can	   be	  found	    at
       http://www.kernel.org/doc/man-pages/.

Linux				  2013-12-11			 SIGPENDING(2)

NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | ERRORS | CONFORMING TO | NOTES | BUGS | SEE ALSO | COLOPHON

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