*Conan The Librarian
Examines pending signals.
int sigpending (sigset_t *set);
A pointer to a sigset_t structure.
This function stores the set of signals that are blocked from
delivery and pending to the calling process in the location
pointed to by the set argument.
Call either the sigemptyset or the sigfillset function at least
once for each object of type sigset_t prior to any other use of
that object. If you do not initialize an object in this way and
supply an argument to the sigpending function, the result is
See sigemptyset, and sigfillset.
0 Indicates success.
-1 Indicates an error; errno is set to the
o SIGSEGV - Bad mask argument.