From: Michael Kerrisk <mtk.manpages@gmail.com>
Date: Sun, 5 May 2019 18:02:30 +0000 (-0500)
Subject: sched_setaffinity.2: Correct details of return value of sched_getaffinity() syscall
X-Git-Tag: man-pages-5.01~14
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=14a848f0f1201942ea1df7c8236c737e4d6d6ae1;p=thirdparty%2Fman-pages.git

sched_setaffinity.2: Correct details of return value of sched_getaffinity() syscall

Things changed a little with:

    commit cd3d8031eb4311e516329aee03c79a08333141f1
    Author: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
    Date:   Fri Mar 12 16:15:36 2010 +0900

Reported-by: Brice Goglin <Brice.Goglin@inria.fr>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
---

diff --git a/man2/sched_setaffinity.2 b/man2/sched_setaffinity.2
index 74bbde81c6..d6663450f4 100644
--- a/man2/sched_setaffinity.2
+++ b/man2/sched_setaffinity.2
@@ -238,9 +238,15 @@ being typed as
 .IR "unsigned long\ *" ,
 reflecting the fact that the underlying implementation of CPU
 sets is a simple bit mask.
+.PP
 On success, the raw
 .BR sched_getaffinity ()
-system call returns the size (in bytes) of the
+system call returns the number of bytes placed copied into the
+.I mask
+buffer;
+this will be the minimum of
+.I cpusetsize
+and the size (in bytes) of the
 .I cpumask_t
 data type that is used internally by the kernel to
 represent the CPU set bit mask.