From 8165c33c808ce3e86173d14a30471fe8474eacf7 Mon Sep 17 00:00:00 2001
From: matt <matt@NetBSD.org>
Date: Thu, 14 Aug 2008 16:19:25 +0000
Subject: [PATCH] Implement following constants and add support their to the
 UFS family of file systems: 	_PC_2_SYMLINKS 	_PC_SYMLINK_MAX

From andy dot shevchenko at gmail dot com.
---
 lib/libc/sys/pathconf.2 |  9 ++++++++-
 sys/sys/unistd.h        |  4 +++-
 sys/ufs/ufs/ufs_vnops.c | 10 ++++++++--
 3 files changed, 19 insertions(+), 4 deletions(-)

diff --git a/lib/libc/sys/pathconf.2 b/lib/libc/sys/pathconf.2
index 8c50cbb41e93..4be85403b96e 100644
--- a/lib/libc/sys/pathconf.2
+++ b/lib/libc/sys/pathconf.2
@@ -1,4 +1,4 @@
-.\"	$NetBSD: pathconf.2,v 1.19 2005/08/14 07:28:29 jmmv Exp $
+.\"	$NetBSD: pathconf.2,v 1.20 2008/08/14 16:19:25 matt Exp $
 .\"
 .\" Copyright (c) 1993
 .\"	The Regents of the University of California.  All rights reserved.
@@ -105,6 +105,13 @@ If the maximum size file that could ever exist on the mounted file system is
 .Dv maxsize ,
 then the returned value is 2 plus the floor of the base 2 logarithm of
 .Dv maxsize .
+.It Li _PC_SYMLINK_MAX
+The maximum number of bytes in a symbolic link.
+.It Li _PC_2_SYMLINKS
+When referring to a directory the system supports the creation of symbolic
+links within that directory; for nondirectory files, the meaning of
+.Dv {_PC_2_SYMLINKS}
+is undefined.
 .El
 .Sh RETURN VALUES
 If the call to
diff --git a/sys/sys/unistd.h b/sys/sys/unistd.h
index a606534252da..605cd70d8675 100644
--- a/sys/sys/unistd.h
+++ b/sys/sys/unistd.h
@@ -1,4 +1,4 @@
-/*	$NetBSD: unistd.h,v 1.44 2008/08/06 17:17:03 matt Exp $	*/
+/*	$NetBSD: unistd.h,v 1.45 2008/08/14 16:19:25 matt Exp $	*/
 
 /*
  * Copyright (c) 1989, 1993
@@ -156,6 +156,8 @@
 #define	_PC_VDISABLE		 9
 #define	_PC_SYNC_IO		10
 #define	_PC_FILESIZEBITS	11
+#define	_PC_SYMLINK_MAX		12
+#define	_PC_2_SYMLINKS		13
 
 /* configurable system variables; use as argument to sysconf(3) */
 /*
diff --git a/sys/ufs/ufs/ufs_vnops.c b/sys/ufs/ufs/ufs_vnops.c
index c5b09d661d68..2fc3027f87b6 100644
--- a/sys/ufs/ufs/ufs_vnops.c
+++ b/sys/ufs/ufs/ufs_vnops.c
@@ -1,4 +1,4 @@
-/*	$NetBSD: ufs_vnops.c,v 1.168 2008/08/12 10:14:38 hannken Exp $	*/
+/*	$NetBSD: ufs_vnops.c,v 1.169 2008/08/14 16:19:25 matt Exp $	*/
 
 /*-
  * Copyright (c) 2008 The NetBSD Foundation, Inc.
@@ -66,7 +66,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: ufs_vnops.c,v 1.168 2008/08/12 10:14:38 hannken Exp $");
+__KERNEL_RCSID(0, "$NetBSD: ufs_vnops.c,v 1.169 2008/08/14 16:19:25 matt Exp $");
 
 #if defined(_KERNEL_OPT)
 #include "opt_ffs.h"
@@ -2153,6 +2153,12 @@ ufs_pathconf(void *v)
 	case _PC_FILESIZEBITS:
 		*ap->a_retval = 42;
 		return (0);
+	case _PC_SYMLINK_MAX:
+		*ap->a_retval = MAXPATHLEN;
+		return (0);
+	case _PC_2_SYMLINKS:
+		*ap->a_retval = 1;
+		return (0);
 	default:
 		return (EINVAL);
 	}