The sigpending() function shall store, in the location referenced
by the set argument, the set of signals that are
blocked from delivery to the calling thread and that are pending on
the process or the calling thread.
Upon successful completion, sigpending() shall return 0; otherwise,
-1 shall be returned and errno set to indicate
No errors are defined.
The following sections are informative.
sigaddset() , sigdelset() , sigemptyset() , sigfillset()
, sigismember() , sigprocmask() , the Base Definitions
IEEE Std 1003.1-2001, <signal.h>
Portions of this text are reprinted and reproduced in electronic form
from IEEE Std 1003.1, 2003 Edition, Standard for Information Technology
-- Portable Operating System Interface (POSIX), The Open Group Base
Specifications Issue 6, Copyright (C) 2001-2003 by the Institute of
Electrical and Electronics Engineers, Inc and The Open Group. In the
event of any discrepancy between this version and the original IEEE and
The Open Group Standard, the original IEEE and The Open Group Standard
is the referee document. The original Standard can be obtained online at