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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>
This commit is contained in:
Michael Kerrisk 2019-05-05 13:02:30 -05:00
parent f19efb02df
commit 14a848f0f1
1 changed files with 7 additions and 1 deletions
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8
man2/sched_setaffinity.2
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@ -238,9 +238,15 @@ being typed as
.IR "unsigned long\ *" , .IR "unsigned long\ *" ,
reflecting the fact that the underlying implementation of CPU reflecting the fact that the underlying implementation of CPU
sets is a simple bit mask. sets is a simple bit mask.
.PP
On success, the raw On success, the raw
.BR sched_getaffinity () .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 .I cpumask_t
data type that is used internally by the kernel to data type that is used internally by the kernel to
represent the CPU set bit mask. represent the CPU set bit mask.