msgctl.2, msgget.2, msgop.2, semctl.2, semget.2, semop.2, shmctl.2, shmget.2: NOTES: <sys/types.h> and <sys/ipc.h> aren't strictly needed

Add text to NOTES to say that the <sys/types.h> and <sys/ipc.h>
header files aren't required by Linux or the standards, but may
be needed for portability to old systems.

Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>

man2/msgctl.2

@@ -32,7 +32,7 @@
 .\"	Added msqid_ds and ipc_perm structure definitions
 .\" 2005-08-02, mtk: Added IPC_INFO, MSG_INFO, MSG_STAT descriptions
 .\"
-.TH MSGCTL 2 2008-08-06 "Linux" "Linux Programmer's Manual"
+.TH MSGCTL 2 2012-05-31 "Linux" "Linux Programmer's Manual"
 .SH NAME
 msgctl \- message control operations
 .SH SYNOPSIS
@@ -310,6 +310,19 @@ capability).
 SVr4, POSIX.1-2001.
 .\" SVID does not document the EIDRM error condition.
 .SH NOTES
+The inclusion of
+.I <sys/types.h>
+and
+.I <sys/ipc.h>
+isn't required on Linux or by any version of POSIX.
+However,
+some old implementations required the inclusion of these header files,
+and the SVID also documented their inclusion.
+Applications intended to be portable to such old systems may need
+to include these header files.
+.\" Like Linux, the FreeBSD man pages still document
+.\" the inclusion of these header files.
+
 The
 .BR IPC_INFO ,
 .B MSG_STAT

man2/msgget.2

@@ -30,7 +30,7 @@
 .\"	Language and formatting clean-ups
 .\"	Added notes on /proc files
 .\"
-.TH MSGGET 2 2004-05-27 "Linux" "Linux Programmer's Manual"
+.TH MSGGET 2 2012-05-31 "Linux" "Linux Programmer's Manual"
 .SH NAME
 msgget \- get a message queue identifier
 .SH SYNOPSIS
@@ -181,6 +181,19 @@ would be exceeded.
 .SH "CONFORMING TO"
 SVr4, POSIX.1-2001.
 .SH NOTES
+The inclusion of
+.I <sys/types.h>
+and
+.I <sys/ipc.h>
+isn't required on Linux or by any version of POSIX.
+However,
+some old implementations required the inclusion of these header files,
+and the SVID also documented their inclusion.
+Applications intended to be portable to such old systems may need
+to include these header files.
+.\" Like Linux, the FreeBSD man pages still document
+.\" the inclusion of these header files.
+
 .B IPC_PRIVATE
 isn't a flag field but a
 .I key_t

man2/msgop.2

@@ -35,7 +35,7 @@
 .\"	Added notes on /proc files
 .\" FIXME . Add example programs to this page.
 .\"
-.TH MSGOP 2 2008-04-23 "Linux" "Linux Programmer's Manual"
+.TH MSGOP 2 2012-05-31 "Linux" "Linux Programmer's Manual"
 .SH NAME
 msgrcv, msgsnd \- message operations
 .SH SYNOPSIS
@@ -397,6 +397,19 @@ and no message of the requested type existed on the message queue.
 .SH "CONFORMING TO"
 SVr4, POSIX.1-2001.
 .SH NOTES
+The inclusion of
+.I <sys/types.h>
+and
+.I <sys/ipc.h>
+isn't required on Linux or by any version of POSIX.
+However,
+some old implementations required the inclusion of these header files,
+and the SVID also documented their inclusion.
+Applications intended to be portable to such old systems may need
+to include these header files.
+.\" Like Linux, the FreeBSD man pages still document
+.\" the inclusion of these header files.
+
 The
 .I msgp
 argument is declared as \fIstruct msgbuf *\fP with

man2/semctl.2

@@ -36,7 +36,7 @@
 .\"	Added semid_ds and ipc_perm structure definitions
 .\" 2005-08-02, mtk: Added IPC_INFO, SEM_INFO, SEM_STAT descriptions.
 .\"
-.TH SEMCTL 2 2009-09-27 "Linux" "Linux Programmer's Manual"
+.TH SEMCTL 2 2012-05-31 "Linux" "Linux Programmer's Manual"
 .SH NAME
 semctl \- semaphore control operations
 .SH SYNOPSIS
@@ -461,6 +461,19 @@ or greater than the implementation limit
 SVr4, POSIX.1-2001.
 .\" SVr4 documents more error conditions EINVAL and EOVERFLOW.
 .SH NOTES
+The inclusion of
+.I <sys/types.h>
+and
+.I <sys/ipc.h>
+isn't required on Linux or by any version of POSIX.
+However,
+some old implementations required the inclusion of these header files,
+and the SVID also documented their inclusion.
+Applications intended to be portable to such old systems may need
+to include these header files.
+.\" Like Linux, the FreeBSD man pages still document
+.\" the inclusion of these header files.
+
 The
 .BR IPC_INFO ,
 .B SEM_STAT

man2/semget.2

@@ -31,7 +31,7 @@
 .\"	Rewrote BUGS note about semget()'s failure to initialize
 .\"		semaphore values
 .\"
-.TH SEMGET 2 2004-05-27 "Linux" "Linux Programmer's Manual"
+.TH SEMGET 2 2012-05-31 "Linux" "Linux Programmer's Manual"
 .SH NAME
 semget \- get a semaphore set identifier
 .SH SYNOPSIS
@@ -219,6 +219,19 @@ SVr4, POSIX.1-2001.
 .\" SVr4 documents additional error conditions EFBIG, E2BIG, EAGAIN,
 .\" ERANGE, EFAULT.
 .SH NOTES
+The inclusion of
+.I <sys/types.h>
+and
+.I <sys/ipc.h>
+isn't required on Linux or by any version of POSIX.
+However,
+some old implementations required the inclusion of these header files,
+and the SVID also documented their inclusion.
+Applications intended to be portable to such old systems may need
+to include these header files.
+.\" Like Linux, the FreeBSD man pages still document
+.\" the inclusion of these header files.
+
 .B IPC_PRIVATE
 isn't a flag field but a
 .I key_t

man2/semop.2

@@ -30,7 +30,7 @@
 .\" 2005-04-08, mtk, Noted kernel version numbers for semtimedop()
 .\" 2007-07-09, mtk, Added an EXAMPLE code segment.
 .\"
-.TH SEMOP 2 2012-05-10 "Linux" "Linux Programmer's Manual"
+.TH SEMOP 2 2012-05-31 "Linux" "Linux Programmer's Manual"
 .SH NAME
 semop, semtimedop \- semaphore operations
 .SH SYNOPSIS
@@ -401,6 +401,19 @@ first appeared in version 2.3.3.
 SVr4, POSIX.1-2001.
 .\" SVr4 documents additional error conditions EINVAL, EFBIG, ENOSPC.
 .SH NOTES
+The inclusion of
+.I <sys/types.h>
+and
+.I <sys/ipc.h>
+isn't required on Linux or by any version of POSIX.
+However,
+some old implementations required the inclusion of these header files,
+and the SVID also documented their inclusion.
+Applications intended to be portable to such old systems may need
+to include these header files.
+.\" Like Linux, the FreeBSD man pages still document
+.\" the inclusion of these header files.
+
 The
 .I sem_undo
 structures of a process aren't inherited by the child produced by

man2/shmctl.2

@@ -40,7 +40,7 @@
 .\"	attaches to a segment that has already been marked for deletion.
 .\" 2005-08-02, mtk: Added IPC_INFO, SHM_INFO, SHM_STAT descriptions.
 .\"
-.TH SHMCTL 2 2008-08-07 "Linux" "Linux Programmer's Manual"
+.TH SHMCTL 2 2012-05-31 "Linux" "Linux Programmer's Manual"
 .SH NAME
 shmctl \- shared memory control
 .SH SYNOPSIS
@@ -369,6 +369,19 @@ SVr4, POSIX.1-2001.
 .\" ENOENT, ENOSPC, ENOMEM, EEXIST.  Neither SVr4 nor SVID documents
 .\" an EIDRM error condition.
 .SH NOTES
+The inclusion of
+.I <sys/types.h>
+and
+.I <sys/ipc.h>
+isn't required on Linux or by any version of POSIX.
+However,
+some old implementations required the inclusion of these header files,
+and the SVID also documented their inclusion.
+Applications intended to be portable to such old systems may need
+to include these header files.
+.\" Like Linux, the FreeBSD man pages still document
+.\" the inclusion of these header files.
+
 The
 .BR IPC_INFO ,
 .B SHM_STAT

man2/shmget.2

@@ -33,7 +33,7 @@
 .\"	Language and formatting clean-ups
 .\"	Added notes on /proc files
 .\"
-.TH SHMGET 2 2006-05-02 "Linux" "Linux Programmer's Manual"
+.TH SHMGET 2 2012-05-31 "Linux" "Linux Programmer's Manual"
 .SH NAME
 shmget \- allocates a shared memory segment
 .SH SYNOPSIS
@@ -233,6 +233,19 @@ SVr4, POSIX.1-2001.
 .B SHM_HUGETLB
 is a nonportable Linux extension.
 .SH NOTES
+The inclusion of
+.I <sys/types.h>
+and
+.I <sys/ipc.h>
+isn't required on Linux or by any version of POSIX.
+However,
+some old implementations required the inclusion of these header files,
+and the SVID also documented their inclusion.
+Applications intended to be portable to such old systems may need
+to include these header files.
+.\" Like Linux, the FreeBSD man pages still document
+.\" the inclusion of these header files.
+
 .B IPC_PRIVATE
 isn't a flag field but a
 .I key_t