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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 signals 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), sigse-
       tops(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)