From 22384accd747d63eaee73c993a5b51dc71dd3be4 Mon Sep 17 00:00:00 2001
From: kleink <kleink@NetBSD.org>
Date: Mon, 3 Aug 1998 14:41:21 +0000
Subject: [PATCH] Add support for _SC_SYNCHRONIZED_IO and _SC_IOV_MAX. 
 Rearrange documentation a bit, and actually document _SC_XOPEN_SHM.

---
 lib/libc/gen/sysconf.3 | 32 +++++++++++++++++++++++++-------
 lib/libc/gen/sysconf.c | 12 ++++++++++--
 2 files changed, 35 insertions(+), 9 deletions(-)

diff --git a/lib/libc/gen/sysconf.3 b/lib/libc/gen/sysconf.3
index 8c48808b1a05..22032aeac704 100644
--- a/lib/libc/gen/sysconf.3
+++ b/lib/libc/gen/sysconf.3
@@ -1,4 +1,4 @@
-.\"	$NetBSD: sysconf.3,v 1.8 1998/05/24 20:12:25 kleink Exp $
+.\"	$NetBSD: sysconf.3,v 1.9 1998/08/03 14:41:21 kleink Exp $
 .\"
 .\" Copyright (c) 1993
 .\"	The Regents of the University of California.  All rights reserved.
@@ -73,18 +73,37 @@ The maximum bytes of argument to
 The maximum number of simultaneous processes per user id.
 .It Li _SC_CLK_TCK
 The number of clock ticks per second.
+.It Li _SC_FSYNC
+Return 1 if the File Synchronization Option is available on this system,
+otherwise \-1.
+.It Li _SC_IOV_MAX
+The maximum number of
+.Va iovec
+structures that a process has available for use with
+.Xr preadv 2 ,
+.Xr pwritev 2 ,
+.Xr readv 2 ,
+.Xr recvmsg 2 ,
+.Xr sendmsg 2
+or
+.Xr writev 2 .
+.It Li _SC_JOB_CONTROL
+Return 1 if job control is available on this system, otherwise \-1.
 .It Li _SC_NGROUPS_MAX
 The maximum number of supplemental groups.
 .It Li _SC_OPEN_MAX
 The maximum number of open files per user id.
+.It Li _SC_PAGESIZE
+The size of a system page in bytes.
 .It Li _SC_STREAM_MAX
 The minimum maximum number of streams that a process may have open
 at any one time.
+.It Li _SC_SYNCHRONIZED_IO
+Return 1 if the Synchronized I/O Option is available on this system,
+otherwise \-1.
 .It Li _SC_TZNAME_MAX
 The minimum maximum number of types supported for the name of a
 timezone.
-.It Li _SC_JOB_CONTROL
-Return 1 if job control is available on this system, otherwise \-1.
 .It Li _SC_SAVED_IDS
 Returns 1 if saved set-group and saved set-user ID is available,
 otherwise \-1.
@@ -146,10 +165,9 @@ otherwise \-1.
 .It Li _SC_2_UPE
 Return 1 if the system supports the User Portability Utilities Option,
 otherwise \-1.
-.It Li _SC_PAGESIZE
-The size of a system page in bytes.
-.It Li _SC_FSYNC
-Return 1 if the system supports the File Synchronisation Option, otherwise \-1.
+.It Li _SC_XOPEN_SHM
+Return 1 of the system supports System V style shared memory,
+otherwise \-1.
 .El
 .Sh RETURN VALUES
 If the call to
diff --git a/lib/libc/gen/sysconf.c b/lib/libc/gen/sysconf.c
index 5d3a51a87cd3..0cea331bd66f 100644
--- a/lib/libc/gen/sysconf.c
+++ b/lib/libc/gen/sysconf.c
@@ -1,4 +1,4 @@
-/*	$NetBSD: sysconf.c,v 1.8 1998/05/24 20:12:27 kleink Exp $	*/
+/*	$NetBSD: sysconf.c,v 1.9 1998/08/03 14:41:21 kleink Exp $	*/
 
 /*-
  * Copyright (c) 1993
@@ -41,7 +41,7 @@
 #if 0
 static char sccsid[] = "@(#)sysconf.c	8.2 (Berkeley) 3/20/94";
 #else
-__RCSID("$NetBSD: sysconf.c,v 1.8 1998/05/24 20:12:27 kleink Exp $");
+__RCSID("$NetBSD: sysconf.c,v 1.9 1998/08/03 14:41:21 kleink Exp $");
 #endif
 #endif /* LIBC_SCCS and not lint */
 
@@ -127,6 +127,10 @@ sysconf(name)
 		mib[0] = CTL_KERN;
 		mib[1] = KERN_FSYNC;
 		goto yesno;
+	case _SC_SYNCHRONIZED_IO:
+		mib[0] = CTL_KERN;
+		mib[1] = KERN_SYNCHRONIZED_IO;
+		goto yesno;
 
 /* 1003.2 */
 	case _SC_BC_BASE_MAX:
@@ -199,6 +203,10 @@ sysconf(name)
 		goto yesno;
 
 /* XPG 4.2 */
+	case _SC_IOV_MAX:
+		mib[0] = CTL_KERN;
+		mib[1] = KERN_IOV_MAX;
+		break;
 	case _SC_XOPEN_SHM:
 		mib[0] = CTL_KERN;
 		mib[1] = KERN_SYSVSHM;