warn if no suffix or no init function are present

servers/slapd/backend.c

@@ -172,6 +172,8 @@ int backend_init(void)
 		binfo[nBackendInfo].bi_type != NULL;
 		nBackendInfo++ )
 	{
+		assert( binfo[nBackendInfo].bi_init );
+
 		rc = binfo[nBackendInfo].bi_init( &binfo[nBackendInfo] );
 
 		if(rc != 0) {
@@ -223,6 +225,21 @@ int backend_add(BackendInfo *aBackendInfo)
 {
    int rc = 0;
 
+   if ( aBackendInfo->bi_init == NULL ) {
+#ifdef NEW_LOGGING
+       	LDAP_LOG( BACKEND, ERR, 
+                  "backend_add:  backend type \"%s\" does not have the "
+		  "(mandatory)init function\n",
+                  aBackendInfo->bi_type, 0, 0 );
+#else
+      Debug( LDAP_DEBUG_ANY,
+                  "backend_add:  backend type \"%s\" does not have the "
+		  "(mandatory)init function\n",
+                  aBackendInfo->bi_type, 0, 0 );
+#endif
+      return -1;
+   }
+
    if ((rc = aBackendInfo->bi_init(aBackendInfo)) != 0) {
 #ifdef NEW_LOGGING
        	LDAP_LOG( BACKEND, ERR, 
@@ -360,6 +377,20 @@ int backend_startup(Backend *be)
 
 		LDAP_TAILQ_INIT( &backendDB[i].be_pending_csn_list );
 
+		if ( backendDB[i].be_suffix == NULL ) {
+#ifdef NEW_LOGGING
+			LDAP_LOG( BACKEND, CRIT, 
+				"backend_startup: warning, database %d (%s) "
+				"has no suffix\n",
+				i, backendDB[i].bd_info->bi_type, 0 );
+#else
+			Debug( LDAP_DEBUG_ANY,
+				"backend_startup: warning, database %d (%s) "
+				"has no suffix\n",
+				i, backendDB[i].bd_info->bi_type, 0 );
+#endif
+		}
+
 		if ( backendDB[i].bd_info->bi_db_open ) {
 			rc = backendDB[i].bd_info->bi_db_open(
 				&backendDB[i] );