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Update to reflect the fact that pipe() is a wrapper around the pipe2()

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system call.

Reviewed by:	jhb, wblock
MFC after:	5 days
Sponsored by:	DAPRA, AFRL
Differential Revision:	https://reviews.freebsd.org/D6948
This commit is contained in:
Brooks Davis 2016-07-20 18:02:07 +00:00
parent f0db85530e
commit a0a2a8b563
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=303104
1 changed files with 20 additions and 1 deletions
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21
lib/libc/sys/pipe.2
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@ -28,7 +28,7 @@
.\" @(#)pipe.2 8.1 (Berkeley) 6/4/93
.\" $FreeBSD$
.\"
.Dd June 22, 2016
.Dd July 20, 2016
.Dt PIPE 2
.Os
.Sh NAME
@ -109,6 +109,18 @@ The bidirectional nature of this implementation of pipes is not
portable to older systems, so it is recommended to use the convention
for using the endpoints in the traditional manner when using a
pipe in one direction.
.Sh IMPLEMENTATION NOTES
The
.Fn pipe
function calls the
.Fn pipe2
system call.
As a result, system call traces such as those captured by
.Xr dtrace 1
or
.Xr ktrace 1
will show calls to
.Fn pipe2 .
.Sh RETURN VALUES
.Rv -std pipe
.Sh ERRORS
@ -157,3 +169,10 @@ The
.Fn pipe2
function appeared in
.Fx 10.0 .
.Pp
The
.Fn pipe
function became a wrapper around
.Fn pipe2
in
.Fx 11.0 .