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sys_rt_sigpending(9) [centos man page]

SYS_RT_SIGPENDING(9)						   Driver Basics					      SYS_RT_SIGPENDING(9)

NAME
sys_rt_sigpending - examine a pending signal that has been raised while blocked SYNOPSIS
long sys_rt_sigpending(sigset_t __user * uset, size_t sigsetsize); ARGUMENTS
uset stores pending signals sigsetsize size of sigset_t type or larger COPYRIGHT
Kernel Hackers Manual 3.10 June 2014 SYS_RT_SIGPENDING(9)

Check Out this Related Man Page

SIGPENDING(2)						     Linux Programmer's Manual						     SIGPENDING(2)

NAME
sigpending, rt_sigpending - examine pending signals SYNOPSIS
#include <signal.h> int sigpending(sigset_t *set); Feature Test Macro Requirements for glibc (see feature_test_macros(7)): sigpending(): _POSIX_C_SOURCE 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. In the event of an error, errno is set to indicate the cause. ERRORS
EFAULT set points to memory which is not a valid part of the process address space. CONFORMING TO
POSIX.1-2001, POSIX.1-2008. NOTES
See sigsetops(3) for details on manipulating signal sets. If a signal is both blocked and has a disposition of "ignored", it is not added to the mask of pending signals when generated. The set of signals that is pending for a thread is the union of the set of signals that is pending for that thread and the set of signals that is pending for the process as a whole; see signal(7). A child created via fork(2) initially has an empty pending signal set; the pending signal set is preserved across an execve(2). C library/kernel differences The original Linux system call was named sigpending(). However, with the addition of real-time signals in Linux 2.2, the fixed-size, 32-bit sigset_t argument supported by that system call was no longer fit for purpose. Consequently, a new system call, rt_sigpending(), was added to support an enlarged sigset_t type. The new system call takes a second argument, size_t sigsetsize, which specifies the size in bytes of the signal set in set. The glibc sigpending() wrapper function hides these details from us, transparently calling rt_sigpend- ing() when the kernel provides it. 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) COLOPHON
This page is part of release 4.15 of the Linux man-pages project. A description of the project, information about reporting bugs, and the latest version of this page, can be found at https://www.kernel.org/doc/man-pages/. Linux 2017-09-15 SIGPENDING(2)
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