diff --git a/libimagdiary/src/config.rs b/libimagdiary/src/config.rs
new file mode 100644
index 00000000..93749289
--- /dev/null
+++ b/libimagdiary/src/config.rs
@@ -0,0 +1,19 @@
+use toml::Value;
+
+use libimagrt::runtime::Runtime;
+
+pub fn get_default_diary_name(rt: &Runtime) -> Option<String> {
+    get_diary_config_section(rt)
+        .and_then(|config| {
+            match config.lookup("default_diary") {
+                Some(&Value::String(ref s)) => Some(s.clone()),
+                _ => None,
+            }
+        })
+}
+
+pub fn get_diary_config_section<'a>(rt: &'a Runtime) -> Option<&'a Value> {
+    rt.config()
+        .map(|config| config.config())
+        .and_then(|config| config.lookup("diary"))
+}
diff --git a/libimagdiary/src/lib.rs b/libimagdiary/src/lib.rs
index 5f4567e7..0e6256e6 100644
--- a/libimagdiary/src/lib.rs
+++ b/libimagdiary/src/lib.rs
@@ -13,6 +13,7 @@ extern crate libimagrt;
 
 module_entry_path_mod!("diary", "0.1.0");
 
+pub mod config;
 pub mod error;
 pub mod diaryid;
 pub mod diary;