SIGPENDING
Section: Linux Programmer's Manual (2)
Updated: 2008-10-04
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),
sigsetops(3),
signal(7)
COLOPHON
This page is part of release 3.27 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/.
Index
- NAME
-
- SYNOPSIS
-
- DESCRIPTION
-
- RETURN VALUE
-
- ERRORS
-
- CONFORMING TO
-
- NOTES
-
- BUGS
-
- SEE ALSO
-
- COLOPHON
-
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