examine signals that are blocked and pending
int sigpending(sigset_t *set);
The sigpending function retrieves those signals that have been sent
but are being blocked from delivery by the
calling process's signal mask.
The signals are stored in the space pointed to by the argument set.
On success, sigpending returns 0.
On failure, sigpending returns -1 and sets errno to identify the error.
In the following conditions, sigpending fails and sets errno to:
The set argument points outside the process's allocated address
Considerations for threads programming
The set returned is the union of
Signals pending to the calling thread but blocked by that thread's signal mask.
Signals pending to the process but blocked by every
currently running thread in the process.
In general, the status from sigpending is only advisory.
A signal pending to the containing process might be delivered to
a sibling thread (if any become eligible) after the return of this system call.
for further details.
Considerations for lightweight processes
In terms of LWPs, the set returned is the union of
Signals pending to the calling LWP but blocked by that LWP's signal mask.
Signals pending to the process but blocked by every LWP contained
in the process.
© 2004 The SCO Group, Inc. All rights reserved.
UnixWare 7 Release 7.1.4 - 25 April 2004