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epoll_ctl.2: Document EPOLLWAKEUP 

Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
This commit is contained in:
NeilBrown 2014-07-07 07:32:33 +02:00 committed by Michael Kerrisk
parent 6351139b47
commit 573f05ef42
1 changed files with 20 additions and 0 deletions
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man2/epoll_ctl.2
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@ -154,6 +154,26 @@ The user must call
with
.B EPOLL_CTL_MOD
to rearm the file descriptor with a new event mask.
.TP
.BR EPOLLWAKEUP " (since Linux 3.5)"
If
.B EPOLLONESHOT
and
.B EPOLLET
are clear and the process has the
.B CAP_BLOCK_SUSPEND
.BR capability (7),
ensure that the system does not enter "suspend" or
"hibernate" while this event is pending or being processed.
The event is considered as being "processed" from when it returned by
a call to
.BR epoll_wait (2)
until the next call to
.BR epoll_wait (2)
on the same
.BR epoll (7)
file descriptor.
.\" commit 4d7e30d98939a0340022ccd49325a3d70f7e0238
.SH RETURN VALUE
When successful,
.BR epoll_ctl ()