[src/trunk]: src/lib/libc/sys add documentation of `shmflg'

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

details:   https://anonhg.NetBSD.org/src/rev/02db67feaee7
branches:  trunk
changeset: 493879:02db67feaee7
user:      assar <assar%NetBSD.org@localhost>
date:      Mon Jun 26 15:46:03 2000 +0000

description:
add documentation of `shmflg'
See PR bin/10431

diffstat:

 lib/libc/sys/shmget.2 |  23 ++++++++++++++++++++++-
 1 files changed, 22 insertions(+), 1 deletions(-)

diffs (37 lines):

diff -r 7a4829d819b7 -r 02db67feaee7 lib/libc/sys/shmget.2
--- a/lib/libc/sys/shmget.2     Mon Jun 26 15:45:43 2000 +0000
+++ b/lib/libc/sys/shmget.2     Mon Jun 26 15:46:03 2000 +0000
@@ -1,4 +1,4 @@
-.\"    $NetBSD: shmget.2,v 1.8 1999/12/02 21:42:39 kleink Exp $        
+.\"    $NetBSD: shmget.2,v 1.9 2000/06/26 15:46:03 assar Exp $ 
 .\"
 .\" Copyright (c) 1995 Frank van der Linden
 .\" All rights reserved.
@@ -45,6 +45,27 @@
 .Fn shmget
 returns the shared memory identifier associated with the key
 .Fa key .
+The
+.Fa shmflg
+should be a combination of the following flags:
+.Bl -tag -offset indent -width IPC_NOWAIT
+.It Dv IPC_CREAT
+create if segment does not exist
+.It Dv IPC_EXCL
+fail if segment already exists
+.It Dv IPC_NOWAIT
+return error instead of waiting
+.El
+.Pp
+and nine bits of access bits, based on:
+.Bl -tag -offset indent -width IPC_R
+.It Dv IPC_R
+read permission
+.It Dv IPC_W
+write permission
+.It Dv IPC_M
+changing control info permission
+.El
 .Pp
 A shared memory segment is created if either
 .Fa key