Newer glibc's have a different nscd socket location #74395
(From Fedora/Redhat)

--- shadow-4.0.7/lib/nscd.c	2003-05-12 02:12:06.000000000 -0400
+++ shadow-4.0.7.jj/lib/nscd.c	2005-05-21 04:44:08.000000000 -0400
@@ -13,7 +13,8 @@
 /* Version number of the daemon interface */
 #define NSCD_VERSION 2
 /* Path for the Unix domain socket.  */
-#define _PATH_NSCDSOCKET "/var/run/.nscd_socket"
+#define _PATH_NSCDSOCKET "/var/run/nscd/socket"
+#define _PATH_NSCDSOCKET_OLD "/var/run/.nscd_socket"
 
 /* Available services.  */
 typedef enum {
@@ -57,8 +58,13 @@ static int nscd_open_socket (void)
 	assert (sizeof (addr.sun_path) >= sizeof (_PATH_NSCDSOCKET));
 	strcpy (addr.sun_path, _PATH_NSCDSOCKET);
 	if (connect (sock, (struct sockaddr *) &addr, sizeof (addr)) < 0) {
-		close (sock);
-		return -1;
+		addr.sun_family = AF_UNIX;
+		assert (sizeof (addr.sun_path) >= sizeof (_PATH_NSCDSOCKET_OLD));
+		strcpy (addr.sun_path, _PATH_NSCDSOCKET_OLD);
+		if (connect (sock, (struct sockaddr *) &addr, sizeof (addr)) < 0) {
+			close (sock);
+			return -1;
+		}
 	}
 
 	return sock;