Add support to sysconf(3) for the variables _SC_NPROCESSORS_CONF and

_SC_NPROCESSORS_ONLN, implemented by AIX/Tru64/Solaris/Linux/SCO/FreeBSD/NetBSD.
Bump libc minor.

From Brad, ok deraadt@ guenther@

3 files changed, 22 insertions, 4 deletions

diff --git a/lib/libc/gen/sysconf.3 b/lib/libc/gen/sysconf.3
index 38ed8d1d09e..e5f3caf10d1 100644
--- a/lib/libc/gen/sysconf.3
+++ b/lib/libc/gen/sysconf.3
@@ -1,4 +1,4 @@
-.\"	$OpenBSD: sysconf.3,v 1.25 2008/06/25 17:45:07 jmc Exp $
+.\"	$OpenBSD: sysconf.3,v 1.26 2010/01/15 08:35:47 sthen Exp $
 .\"
 .\" Copyright (c) 1993
 .\"	The Regents of the University of California.  All rights reserved.
@@ -27,7 +27,7 @@
 .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 .\" SUCH DAMAGE.
 .\"
-.Dd $Mdocdate: June 25 2008 $
+.Dd $Mdocdate: January 15 2010 $
 .Dt SYSCONF 3
 .Os
 .Sh NAME
@@ -168,6 +168,10 @@ functions.
 The maximum length of a login name.
 .It Li _SC_THREAD_SAFE_FUNCTIONS
 The level of support for thread-safe (re-entrant) functions.
+.It Li _SC_NPROCESSORS_CONF
+The number of processors configured.
+.It Li _SC_NPROCESSORS_ONLN
+The number of processors online (capable of running processes).
 .El
 .Sh RETURN VALUES
 If the call to
@@ -202,6 +206,11 @@ The
 .Fn sysconf
 function conforms to
 .St -p1003.1-88 .
+The constants
+.Li _SC_NPROCESSORS_CONF
+and
+.Li _SC_NPROCESSORS_ONLN
+are not part of the standard, but are provided by many systems.
 .Sh HISTORY
 The
 .Fn sysconf
diff --git a/lib/libc/gen/sysconf.c b/lib/libc/gen/sysconf.c
index ea5eff13a53..97adeed047c 100644
--- a/lib/libc/gen/sysconf.c
+++ b/lib/libc/gen/sysconf.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: sysconf.c,v 1.10 2008/06/25 14:54:44 millert Exp $ */
+/*	$OpenBSD: sysconf.c,v 1.11 2010/01/15 08:35:47 sthen Exp $ */
 /*-
  * Copyright (c) 1993
  *	The Regents of the University of California.  All rights reserved.
@@ -238,6 +238,15 @@ yesno:		if (sysctl(mib, namelen, &value, &len, NULL, 0) == -1)
 		return (vmtotal.t_free);
 	}
 
+	case _SC_NPROCESSORS_CONF:
+		mib[0] = CTL_HW;
+		mib[1] = HW_NCPU;
+		break;
+	case _SC_NPROCESSORS_ONLN:
+		mib[0] = CTL_HW;
+		mib[1] = HW_NCPU;
+		break;
+
 	default:
 		errno = EINVAL;
 		return (-1);
diff --git a/lib/libc/shlib_version b/lib/libc/shlib_version
index 5db4ec0a7ac..b6d2a137e28 100644
--- a/lib/libc/shlib_version
+++ b/lib/libc/shlib_version
@@ -1,4 +1,4 @@
 major=53
-minor=0
+minor=1
 # note: If changes were made to include/thread_private.h or if system
 # calls were added/changed then libpthread must also be updated.