Index: gen/sysconf.3
===================================================================
RCS file: /usr/repo/src/lib/libc/gen/sysconf.3,v
retrieving revision 1.21
diff -u -p -r1.21 sysconf.3
--- gen/sysconf.3	20 Jan 2005 09:17:02 -0000	1.21
+++ gen/sysconf.3	14 Aug 2006 12:47:42 -0000
@@ -165,6 +165,19 @@ otherwise \-1.
 Return 1 if the system supports the User Portability Utilities Option,
 otherwise \-1.
 .El
+.Pp
+These values also exist, but may not be standard:
+.Pp
+.Bl -tag -width 6n
+.Pp
+.It Li _SC_PHYS_PAGES
+The number of pages of physical memory.
+Note that it is possible for the product of this value and the value of
+.Li _SC_PAGE_SIZE
+to overflow.
+.It Li _SC_AVPHYS_PAGES
+The number of currently available pages of physical memory.
+.El
 .Sh RETURN VALUES
 If the call to
 .Fn sysconf
Index: gen/sysconf.c
===================================================================
RCS file: /usr/repo/src/lib/libc/gen/sysconf.c,v
retrieving revision 1.20
diff -u -p -r1.20 sysconf.c
--- gen/sysconf.c	17 Nov 2002 08:54:29 -0000	1.20
+++ gen/sysconf.c	14 Aug 2006 12:46:20 -0000
@@ -574,6 +574,20 @@ yesno:		if (sysctl(mib, 2, &value, &len,
 		mib[1] = HW_NCPU;
 		break;
 
+	case _SC_PHYS_PAGES:
+		path = "hw.availpages";
+		goto get_sysctl;
+	case _SC_AVPHYS_PAGES:
+		path = "vm.stats.vm.v_free_count";
+get_sysctl:
+		sverrno = errno;
+		if (sysctlbyname(path, &value, &len, NULL, 0) == -1) {
+			errno = sverrno;
+			return (-1);
+		}
+		errno = sverrno;
+		return (value);
+
 	default:
 		errno = EINVAL;
 		return (-1);