ulogd: provide default configure implementation

Provide a default implementation for the configure hook which simply
calls ulogd_parse_configfile(), so simple plugins only need to provide
the config_keyset. This also triggers an "unknown key" error if a
plugin defines no config_keyset (aka it has no options), but the config
file contains directives for it.

Signed-off-by: Corubba Smith <corubba@gmx.de>
Signed-off-by: Florian Westphal <fw@strlen.de>

2 files changed, 24 insertions, 9 deletions

diff --git a/src/conffile.c b/src/conffile.c
index 955956a..e55ff30 100644
--- a/src/conffile.c
+++ b/src/conffile.c
@@ -158,7 +158,12 @@ int config_parse_file(const char *section, struct config_keyset *kset)
 	}
 
 	if (!found) {
-		err = -ERRSECTION;
+		if (kset->num_ces == 0) {
+			/* If there are no options, then no section isnt an error. */
+			err = 0;
+		} else {
+			err = -ERRSECTION;
+		}
 		goto cpf_error;
 	}
 
diff --git a/src/ulogd.c b/src/ulogd.c
index c844767..b146f94 100644
--- a/src/ulogd.c
+++ b/src/ulogd.c
@@ -856,19 +856,29 @@ create_stack_resolve_keys(struct ulogd_pluginstance_stack *stack)
 
 	/* pre-configuration pass */
 	llist_for_each_entry_reverse(pi_cur, &stack->list, list) {
+		int ret;
+
 		ulogd_log(ULOGD_DEBUG, "traversing plugin `%s'\n", 
 			  pi_cur->plugin->name);
 		/* call plugin to tell us which keys it requires in
 		 * given configuration */
 		if (pi_cur->plugin->configure) {
-			int ret = pi_cur->plugin->configure(pi_cur, 
-							    stack);
-			if (ret < 0) {
-				ulogd_log(ULOGD_ERROR, "error during "
-					  "configure of plugin %s\n",
-					  pi_cur->plugin->name);
-				return ret;
-			}
+			ret = pi_cur->plugin->configure(pi_cur, stack);
+		} else {
+			struct config_keyset empty_kset = {.num_ces=0};
+			struct config_keyset *kset = &empty_kset;
+
+			if (pi_cur->config_kset)
+				kset = pi_cur->config_kset;
+
+			ret = ulogd_parse_configfile(pi_cur->id, kset);
+		}
+
+		if (ret < 0) {
+			ulogd_log(ULOGD_ERROR, "error during "
+				  "configure of plugin %s\n",
+				  pi_cur->plugin->name);
+			return ret;
 		}
 	}