diff --git a/src/main.rs b/src/main.rs
index d02c716..728f915 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -29,7 +29,7 @@ where
 	}
 }
 
-fn main() {
+fn main() -> Result<(), &'static str> {
 	let max_n: u32 = 10;
 
 	let matches = App::new(env!("CARGO_PKG_NAME"))
@@ -48,10 +48,11 @@ fn main() {
 				command.arg(arg);
 			}
 
-			command
+			Some(command)
 		}
-		_ => panic!("no command was given"),
-	};
+		_ => None,
+	}
+	.ok_or("no command was given")?;
 
 	let mut iterations: u32 = 0;
 	let mut slot_time: Option<SlotTime> = None;
@@ -65,12 +66,9 @@ fn main() {
 		iterations += 1;
 
 		match status.code() {
-			Some(0) => break,
+			Some(0) => break Ok(()),
 			Some(_) => {}
-			None => {
-				eprintln!("Child terminated by signal; breaking");
-				break;
-			}
+			None => break Err("child terminated by signal"),
 		}
 
 		if let Some(SlotTime::AutoGenerated(dur)) = &slot_time {