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NAME

       sigpending - examine pending signals

SYNOPSIS

       #include <signal.h>

       int sigpending(sigset_t *set);

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.

NOTES

       See sigsetops(3) for details on manipulating signal sets.

CONFORMING TO

       POSIX.1-2001.

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)