nss: Turn __nss_database_lookup into a compatibility symbol

The function uses the internal service_user type, so it is not
really usable from the outside of glibc.  Rename the function
to __nss_database_lookup2 for internal use, and change
__nss_database_lookup to always indicate failure to the caller.

__nss_next already was a compatibility symbol.  The new
implementation always fails and no longer calls __nss_next2.

unscd, the alternative nscd implementation, does not use
__nss_database_lookup, so it is not affected by this change.

1 files changed, 4 insertions, 4 deletions

diff --git a/nss/nsswitch.h b/nss/nsswitch.h
index 475e007e33..79a874e9d6 100644
--- a/nss/nsswitch.h
+++ b/nss/nsswitch.h
@@ -125,10 +125,10 @@ extern bool __nss_database_custom[NSS_DBSIDX_max] attribute_hidden;
    If there is no configuration for this database in the file,
    parse a service list from DEFCONFIG and use that.  More
    than one function can use the database.  */
-extern int __nss_database_lookup (const char *database,
-				  const char *alternative_name,
-				  const char *defconfig, service_user **ni);
-libc_hidden_proto (__nss_database_lookup)
+extern int __nss_database_lookup2 (const char *database,
+				   const char *alternative_name,
+				   const char *defconfig, service_user **ni);
+libc_hidden_proto (__nss_database_lookup2)
 
 /* Put first function with name FCT_NAME for SERVICE in FCTP.  The
    position is remembered in NI.  The function returns a value < 0 if