From 3699b154364dca2879c6ef9a4f10abde07ca3e28 Mon Sep 17 00:00:00 2001 From: Michael Kerrisk Date: Sun, 22 Mar 2015 11:31:35 +0100 Subject: [PATCH] sigprocmask.2: Note treatment of signals used internally by NPTL The glibc wrapper silently ignores attempts to block the two real-time signals used by NPTL. Signed-off-by: Michael Kerrisk --- man2/sigprocmask.2 | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/man2/sigprocmask.2 b/man2/sigprocmask.2 index d9c99be6d..c2babf5e5 100644 --- a/man2/sigprocmask.2 +++ b/man2/sigprocmask.2 @@ -143,6 +143,14 @@ See for details on manipulating signal sets. .\" .SS C library/kernel ABI differences +The glibc wrapper function for +.BR sigprocmask () +silently ignores attempts to block the two real-time signals that +are used internally by the NPTL threading implementation. +See +.BR nptl (7) +for details. + The original Linux system call was named .BR sigprocmask (). However, with the addition of real-time signals in Linux 2.2,