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SIGPENDING(2) Linux Programmer's Manual SIGPENDING(2)
sigpending - examine pending signals
int sigpending(sigset_t *set);
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.
sigpending() returns 0 on success and -1 on error.
EFAULT set points to memory which is not a valid part of the process
See sigsetops(3) for details on manipulating signal sets.
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.
kill(2), sigaction(2), signal(2), sigprocmask(2), sigsuspend(2), sigsetops(3)
Linux 2.6.13 2005-09-15 SIGPENDING(2)
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