1 files changed, 32 insertions, 0 deletions
diff --git a/src/wait/error.rs b/src/wait/error.rs
new file mode 100644
index 0000000..bb95e81
--- /dev/null
+++ b/src/wait/error.rs
@@ -0,0 +1,32 @@
+use nix;
+use std::time::Duration;
+
+#[derive(Debug)]
+pub enum WaitError {
+    TimedOut(Duration),
+    OsError(nix::Error)
+}
+
+impl From<nix::Error> for WaitError {
+    fn from(err: nix::Error) -> Self {
+        WaitError::OsError(err)
+    }
+}
+
+impl std::fmt::Display for WaitError {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        match *self {
+            WaitError::TimedOut(dur) => write!(f, "process timed out in {:?}", dur),
+            WaitError::OsError(err) => err.fmt(f)
+        }
+    }
+}
+
+impl std::error::Error for WaitError {
+    fn source(&self) -> Option<&(dyn std::error::Error + 'static)> {
+        match *self {
+            WaitError::TimedOut(_) => None,
+            WaitError::OsError(ref e) => Some(e)
+        }
+    }
+}
+\ No newline at end of file