Difference of _NSIG between the kernel UAPI header and libc header

Xi Ruoyao <[email protected]> Fri, 03 Jul 2026 15:30:44 +0800

Newsgroups	gmane.comp.lib.glibc.alpha
Message-ID	<[email protected]>

Hi,

In the kernel UAPI header, _NSIG is defined with the same value of
SIGRTMAX; but in the libc header, _NSIG is defined as SIGRTMAX + 1.

I'm wondering: what is the rationale of the difference here?

-- 
Xi Ruoyao <[email protected]>

lmpx.com only provides a reader for public news (NNTP) servers. It is not affiliated with the servers or forums shown here and is not responsible for the content of articles, which is written by their respective authors.