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SIGPENDING(2) Linux Programmer's Manual SIGPENDING(2)
sigpending - examine pending signals
#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
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.
sigpending() returns 0 on success and -1 on error.
EFAULT set points to memory which is not a valid part of the process address
space.
POSIX.1-2001.
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).
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.
kill(2), sigaction(2), signal(2), sigprocmask(2), sigsuspend(2), sigsetops(3),
signal(7)
This page is part of release 3.32 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)
HTML rendering created 2010-12-03 by Michael Kerrisk, author of The Linux Programming Interface