kqueue(9): document f_copy

f_copy controls whether and how a knote is inherited by the child
process.

Sponsored by:		Netflix
Reviewed by:		kib
Differential Revision:	https://reviews.freebsd.org/D53845

This commit is contained in:

Warner Losh

2025-12-02 21:40:47 -07:00

parent 0e60cb8c6a

commit 6183477474

1 changed files with 13 additions and 1 deletions

									
										share/man/man9/kqueue.9
									
		+13
		-1
	
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					@@ -22,7 +22,7 @@

					.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF

					.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF

					.\" SUCH DAMAGE.

					.\" SUCH DAMAGE.

					.\"

					.\"

					.Dd December 18, 2023

					.Dd December 2, 2025

					.Dt KQUEUE 9

					.Dt KQUEUE 9

					.Os

					.Os

					.Sh NAME

					.Sh NAME

					@@ -197,6 +197,18 @@ function of the

					that the

					that the

					.Va knote

					.Va knote

					was added to.

					was added to.

					.It Va f_copy

					The

					.Va f_copy

					function is called to copy notes when the process forks.

					When

					.Dv NULL ,

					the current node is not duplicated to the child process.

					Filter might set

					.Dv f_copy

					to

					.Fn knote_triv_copy

					if there is no additional handling required, besides shallow copying of the knote itself.

					.El

					.El

					.Pp

					.Pp

					The function

					The function