From: Timo Sirainen <timo.sirainen@open-xchange.com>
Date: Thu, 10 Apr 2025 14:54:12 +0000 (+0300)
Subject: lib-settings: Add settings_key_exists()
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=9f6e3d6dbda159e9989720fbc11a50295995a65b;p=thirdparty%2Fdovecot%2Fcore.git

lib-settings: Add settings_key_exists()
---

diff --git a/src/lib-settings/settings.c b/src/lib-settings/settings.c
index 4bd815a0e3..31e8862779 100644
--- a/src/lib-settings/settings.c
+++ b/src/lib-settings/settings.c
@@ -2710,6 +2710,30 @@ settings_get_real(struct event *event,
 	return ret;
 }
 
+bool settings_key_exists(struct event *event, const char *key)
+{
+	struct settings_root *root = NULL;
+	do {
+		root = event_get_ptr(event, SETTINGS_EVENT_ROOT);
+		event = event_get_parent(event);
+	} while (root == NULL && event != NULL);
+	if (root == NULL)
+		i_panic("settings_key_exists() - event has no SETTINGS_EVENT_ROOT");
+
+	bool ret;
+	T_BEGIN {
+		size_t len = strlen(key);
+		if (len > 0 && key[len-1] == SETTINGS_APPEND_KEY_SUFFIX[0])
+			key = t_strndup(key, len - 1);
+
+		enum setting_type set_type ATTR_UNUSED;
+		const void *blocks ATTR_UNUSED;
+		ret = settings_mmap_lookup_key(root->mmap, key,
+					       &set_type, &blocks);
+	} T_END;
+	return ret;
+}
+
 struct settings_filter_array_item {
 	union {
 		unsigned int uint;
diff --git a/src/lib-settings/settings.h b/src/lib-settings/settings.h
index 5a7ee67230..59ae1584ba 100644
--- a/src/lib-settings/settings.h
+++ b/src/lib-settings/settings.h
@@ -257,6 +257,10 @@ settings_get_or_fatal(struct event *event,
 		} \
 	} STMT_END
 
+/* Returns TRUE if a setting key is valid. The settings must have been read
+   before calling this. SETTINGS_APPEND_KEY_SUFFIX is ignored in the key. */
+bool settings_key_exists(struct event *event, const char *key);
+
 /* Override a setting. */
 void settings_override(struct settings_instance *instance,
 		       const char *key, const char *value,