quota: Check that quota_mail_size is not 0

diff --git a/src/plugins/quota/quota-settings.c b/src/plugins/quota/quota-settings.c
index 0760c6f00f83bf10a8a077c9d8cf741ff7b26564..1394c8fbc92319197a70afe629bea0bf85d7dcfc 100644 (file)
--- a/src/plugins/quota/quota-settings.c
+++ b/src/plugins/quota/quota-settings.c
@@ -35,6 +35,20 @@ static const struct quota_settings quota_default_settings = {
        .quota_exceeded_message = "Quota exceeded (mailbox for user is full)",
 };
 
+/* <settings checks> */
+static bool quota_settings_check(void *_set, pool_t pool ATTR_UNUSED,
+                                const char **error_r)
+{
+       const struct quota_settings *set = _set;
+       if (set->quota_mail_size == 0) {
+               *error_r = "quota_mail_size must not be 0. "
+                          "(Did you mean \"unlimited\"?)";
+               return FALSE;
+       }
+       return TRUE;
+}
+/* </settings checks> */
+
 const struct setting_parser_info quota_setting_parser_info = {
        .name = "quota",
        .plugin_dependency = "lib10_quota_plugin",
@@ -42,6 +56,7 @@ const struct setting_parser_info quota_setting_parser_info = {
        .defaults = &quota_default_settings,
        .struct_size = sizeof(struct quota_settings),
        .pool_offset1 = 1 + offsetof(struct quota_settings, pool),
+       .check_func = quota_settings_check,
 };
 
 #undef DEF