From e5980f83e69c6c6ede89ecd02db5e84687921122 Mon Sep 17 00:00:00 2001
From: wollman <wollman@FreeBSD.org>
Date: Sun, 27 Oct 2002 18:03:02 +0000
Subject: Update limits and configuration parameters for 1003.1/TC1/D6.
 Implement new sysconf keys.  Change the implenentation of _SC_ASYNCHRONOUS_IO
 in preparation for the next set of changes.

Move some limits which had been in <sys/syslimits.h> to <limits.h> where
they belong.  They had only ever been in syslimits.h to provide for the
kernel implementation of the CTL_USER MIB branch, which went away with
newsysctl years ago.  (There is a #error in <sys/syslimits.h> which I
will downgrade in the next commit.)
---
 lib/libc/gen/sysconf.c | 24 +++++++++++++++++++++++-
 1 file changed, 23 insertions(+), 1 deletion(-)

(limited to 'lib/libc')

diff --git a/lib/libc/gen/sysconf.c b/lib/libc/gen/sysconf.c
index ee596a2..2f1dcca 100644
--- a/lib/libc/gen/sysconf.c
+++ b/lib/libc/gen/sysconf.c
@@ -44,6 +44,7 @@ __FBSDID("$FreeBSD$");
 #include <sys/time.h>
 #include <sys/sysctl.h>
 #include <sys/resource.h>
+#include <sys/socket.h>
 
 #include <errno.h>
 #include <limits.h>
@@ -176,9 +177,13 @@ do_NAME_MAX:
 		return (value);
 
 	case _SC_ASYNCHRONOUS_IO:
+#if _POSIX_ASYNCHRONOUS_IO == 0
 		mib[0] = CTL_P1003_1B;
 		mib[1] = CTL_P1003_1B_ASYNCHRONOUS_IO;
-		goto yesno;
+		break;
+#else
+		return (_POSIX_ASYNCHRONOUS_IO);
+#endif
 	case _SC_MAPPED_FILES:
 		return (_POSIX_MAPPED_FILES);
 	case _SC_MEMLOCK:
@@ -545,6 +550,23 @@ yesno:		if (sysctl(mib, 2, &value, &len, NULL, 0) == -1)
 	case _SC_XOPEN_XCU_VERSION:
 		return (_XOPEN_XCU_VERSION);
 #endif
+	case _SC_SYMLOOP_MAX:
+		return (MAXSYMLINKS);
+	case _SC_RAW_SOCKETS:
+		return (_POSIX_RAW_SOCKETS);
+	case _SC_IPV6:
+#if _POSIX_IPV6 == 0
+		sverrno = errno;
+		value = socket(PF_INET6, SOCK_DGRAM, 0);
+		errno = sverrno;
+		if (value >= 0) {
+			close(value);
+			return (200112L);
+		} else
+			return (0);
+#else
+		return (_POSIX_IPV6);
+#endif
 
 	case _SC_NPROCESSORS_CONF:
 	case _SC_NPROCESSORS_ONLN:
-- 
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