[src/trunk]: src/lib/libc/gen Correct outdated note that posix_spawn(3) is im...

[kamil <kamil%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/4c376f4057c3
branches:  trunk
changeset: 451900:4c376f4057c3
user:      kamil <kamil%NetBSD.org@localhost>
date:      Tue Jun 11 12:47:34 2019 +0000

description:
Correct outdated note that posix_spawn(3) is implemented with vfork(2)

The original FreeBSD libc code uses vfork(2), it's not the case for NetBSD
as there is a dedicated kernel syscall.

diffstat:

 lib/libc/gen/posix_spawn.3 |  12 +++++-------
 1 files changed, 5 insertions(+), 7 deletions(-)

diffs (33 lines):

diff -r 9444f9fa3406 -r 4c376f4057c3 lib/libc/gen/posix_spawn.3
--- a/lib/libc/gen/posix_spawn.3        Tue Jun 11 11:57:14 2019 +0000
+++ b/lib/libc/gen/posix_spawn.3        Tue Jun 11 12:47:34 2019 +0000
@@ -1,4 +1,4 @@
-.\" $NetBSD: posix_spawn.3,v 1.6 2014/02/02 16:59:06 wiz Exp $
+.\" $NetBSD: posix_spawn.3,v 1.7 2019/06/11 12:47:34 kamil Exp $
 .\"
 .\" Copyright (c) 2008 Ed Schouten <ed%FreeBSD.org@localhost>
 .\" All rights reserved.
@@ -36,7 +36,7 @@
 .\"
 .\" $FreeBSD: src/lib/libc/gen/posix_spawn.3,v 1.2.2.1.4.1 2010/06/14 02:09:06 kensmith Exp $
 .\"
-.Dd February 2, 2014
+.Dd June 11, 2019
 .Dt POSIX_SPAWN 3
 .Os
 .Sh NAME
@@ -312,11 +312,9 @@
 .Fn execve
 had been called by the child process to execute the new process image.
 .Pp
-The implementation uses vfork(), thus the fork handlers are not run when
-.Fn posix_spawn
-or
-.Fn posix_spawnp
-is called.
+This implementation does not run
+.Xr pthread_atfork 3
+callbacks.
 .Sh RETURN VALUES
 Upon successful completion,
 .Fn posix_spawn