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CentOS 7.0 - man page for rt_sigpending (centos section 2)

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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 sig-
       nals 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.

       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), sigsetops(3), signal(7)

COLOPHON
       This  page  is  part of release 3.53 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					    2013-04-19				    SIGPENDING(2)
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