Index: head/lib/libc/sys/msgget.2
===================================================================
--- head/lib/libc/sys/msgget.2
+++ head/lib/libc/sys/msgget.2
@@ -31,7 +31,7 @@
 .\" $FreeBSD$
 .\"
 .\"/
-.Dd July 9, 2009
+.Dd March 4, 2018
 .Dt MSGGET 2
 .Os
 .Sh NAME
@@ -40,8 +40,6 @@
 .Sh LIBRARY
 .Lb libc
 .Sh SYNOPSIS
-.In sys/types.h
-.In sys/ipc.h
 .In sys/msg.h
 .Ft int
 .Fn msgget "key_t key" "int msgflg"
@@ -83,7 +81,22 @@
 .It
 .Va msg_perm.mode
 is set to the lower 9 bits of
-.Fa msgflg .
+.Fa msgflg
+which are set by ORing these constants:
+.Bl -tag -width 0000
+.It Dv 0400
+Read access for user.
+.It Dv 0200
+Write access for user.
+.It Dv 0040
+Read access for group.
+.It Dv 0020
+Write access for group.
+.It Dv 0004
+Read access for other.
+.It Dv 0002
+Write access for other.
+.El
 .It
 .Va msg_cbytes ,
 .Va msg_qnum ,
Index: head/lib/libc/sys/semget.2
===================================================================
--- head/lib/libc/sys/semget.2
+++ head/lib/libc/sys/semget.2
@@ -25,7 +25,7 @@
 .\"
 .\" $FreeBSD$
 .\"
-.Dd February 7, 2016
+.Dd March 4, 2018
 .Dt SEMGET 2
 .Os
 .Sh NAME
@@ -34,8 +34,6 @@
 .Sh LIBRARY
 .Lb libc
 .Sh SYNOPSIS
-.In sys/types.h
-.In sys/ipc.h
 .In sys/sem.h
 .Ft int
 .Fn semget "key_t key" "int nsems" "int flag"
@@ -77,23 +75,22 @@
 .\" Likewise for this section, except SHM_* becomes SEM_*.
 .\"
 .Pp
-The mode of a newly created IPC object is determined by
-.Em OR Ns 'ing
-the following constants into the
+The mode of a newly created IPC object is determined by ORing these constants
+into the
 .Fa flag
 argument:
-.Bl -tag -width XSEM_WXX6XXX
-.It Dv SEM_R
+.Bl -tag -width 0000
+.It Dv 0400
 Read access for user.
-.It Dv SEM_A
+.It Dv 0200
 Alter access for user.
-.It Dv ( SEM_R>>3 )
+.It Dv 0040
 Read access for group.
-.It Dv ( SEM_A>>3 )
+.It Dv 0020
 Alter access for group.
-.It Dv ( SEM_R>>6 )
+.It Dv 0004
 Read access for other.
-.It Dv ( SEM_A>>6 )
+.It Dv 0002
 Alter access for other.
 .El
 .Pp
Index: head/lib/libc/sys/shmget.2
===================================================================
--- head/lib/libc/sys/shmget.2
+++ head/lib/libc/sys/shmget.2
@@ -25,7 +25,7 @@
 .\"
 .\" $FreeBSD$
 .\"
-.Dd August 12, 2017
+.Dd March 4, 2018
 .Dt SHMGET 2
 .Os
 .Sh NAME
@@ -34,9 +34,6 @@
 .Sh LIBRARY
 .Lb libc
 .Sh SYNOPSIS
-.In sys/types.h
-.In sys/stat.h
-.In sys/ipc.h
 .In sys/shm.h
 .Ft int
 .Fn shmget "key_t key" "size_t size" "int flag"
@@ -75,22 +72,21 @@
 .El
 .Pp
 The mode of a newly created IPC object is determined by
-.Em OR Ns 'ing
-the following constants into the
+which are set by ORing these constants into the
 .Fa flag
 argument:
-.Bl -tag -width XSHM_WXX6XXX
-.It Dv S_IRUSR
+.Bl -tag -width 0000
+.It Dv 0400
 Read access for owner.
-.It Dv S_IWUSR
+.It Dv 0200
 Write access for owner.
-.It Dv S_IRGRP
+.It Dv 0040
 Read access for group.
-.It Dv S_IWGRP
+.It Dv 0020
 Write access for group.
-.It Dv S_IROTH
+.It Dv 0004
 Read access for other.
-.It Dv S_IWOTH
+.It Dv 0002
 Write access for other.
 .El
 .\"
@@ -143,5 +139,4 @@
 .Xr shmat 2 ,
 .Xr shmctl 2 ,
 .Xr shmdt 2 ,
-.Xr stat 2 ,
 .Xr ftok 3