= Implement name service switch modules (NSS modules). NSS modules

  may be built into libc (`static NSS modules') or dynamically loaded
  via dlopen (`dynamic NSS modules').  Modules are loaded/initialized
  at configuration time (i.e.  when nsdispatch is called and nsswitch.conf
  is read or re-read).

= Make the nsdispatch(3) core thread-safe.

= New status code for nsdispatch(3) `NS_RETURN', currently used to
  signal ERANGE-type issues.

= syslog(3) problems, don't warn/err/abort.

= Try harder to avoid namespace pollution.

= Implement some shims to assist in porting NSS modules written for
  the GNU C Library nsswitch interface.

Sponsored by:	DARPA, Network Associates Laboratories

1 files changed, 56 insertions, 0 deletions

diff --git a/include/nss.h b/include/nss.h
new file mode 100644
index 0000000..86a08ed
--- /dev/null
+++ b/include/nss.h
@@ -0,0 +1,56 @@
+/*-
+ * Copyright (c) 2003 Networks Associates Technology, Inc.
+ * All rights reserved.
+ *
+ * This software was developed for the FreeBSD Project by
+ * Jacques A. Vidrine, Safeport Network Services, and Network
+ * Associates Laboratories, the Security Research Division of Network
+ * Associates, Inc. under DARPA/SPAWAR contract N66001-01-C-8035
+ * ("CBOSS"), as part of the DARPA CHATS research program.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * $FreeBSD$
+ *
+ * Compatibility header for the GNU C Library-style nsswitch interface.
+ */
+#ifndef _NSS_H_
+#define _NSS_H_
+
+#include <nsswitch.h>
+
+enum nss_status {
+	NSS_STATUS_TRYAGAIN = -2,
+	NSS_STATUS_UNAVAIL,
+	NSS_STATUS_NOTFOUND,
+	NSS_STATUS_SUCCESS,
+	NSS_STATUS_RETURN
+};
+
+#define __nss_compat_result(rv)			\
+((rv == NSS_STATUS_TRYAGAIN) ? NS_TRYAGAIN :	\
+ (rv == NSS_STATUS_UNAVAIL)  ? NS_UNAVAIL  :	\
+ (rv == NSS_STATUS_NOTFOUND) ? NS_NOTFOUND :	\
+ (rv == NSS_STATUS_SUCCESS)  ? NS_SUCCESS  :	\
+ (rv == NSS_STATUS_RETURN)   ? NS_RETURN   : 0)
+
+#endif