Section: Linux Programmer's Manual (2)
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sigpending - examine pending signals
int sigpending(sigset_t *set);
Feature Test Macro Requirements for glibc (see
_POSIX_C_SOURCE >= 1 || _XOPEN_SOURCE || _POSIX_SOURCE
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
returns 0 on success and -1 on error.
In the event of an error,
is set to indicate the cause.
points to memory which is not a valid part of the process address space.
for details on manipulating signal sets.
If a signal is both blocked and has a disposition of "ignored", it is
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
A child created via
initially has an empty pending signal set;
the pending signal set is preserved across an
In versions of glibc up to and including 2.2.1,
there is a bug in the wrapper function for
which means that information about pending real-time signals
is not correctly returned.
This page is part of release 3.74 of the Linux
A description of the project,
information about reporting bugs,
and the latest version of this page,
can be found at
- RETURN VALUE
- CONFORMING TO
- SEE ALSO