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.

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 3.25 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)