diff --git a/src/swab.rs b/src/swab.rs
index 6afed28..2cd7800 100644
--- a/src/swab.rs
+++ b/src/swab.rs
@@ -35,15 +35,9 @@ use strerror::StrError;
 #[cfg(target_os="openbsd")] extern crate openbsd;
 #[cfg(target_os="openbsd")] use openbsd::{ Promises, pledge };
 
-
-fn oserr(argv0: &str, e: Error) -> ExitCode {
+fn err(argv0: &str, e: Error, code: u8) -> ExitCode {
 	eprintln!("{}: {}", argv0, e.strerror());
-	ExitCode::from(EX_OSERR)
-}
-
-fn ioerr(argv0: &str, e: Error) -> ExitCode {
-	eprintln!("{}: {}", argv0, e.strerror());
-	ExitCode::from(EX_IOERR)
+	ExitCode::from(code)
 }
 
 fn usage(s: &str) -> ExitCode {
@@ -57,7 +51,7 @@ fn main() -> ExitCode {
 	#[cfg(target_os="openbsd")] {
 		let promises = Promises::new("stdio");
 		if let Err(e) = pledge(Some(promises), None) {
-			return oserr(&argv[0], e);
+			return err(&argv[0], e, EX_OSERR);
 		}
 	}
 
@@ -94,16 +88,16 @@ fn main() -> ExitCode {
 
 				if let Err(e) = output.write(&right)
 						.and_then(|_| output.write(&left)) {
-					break ioerr(&argv[0], e);
+					break err(&argv[0], e, EX_IOERR);
 				}
 
 			},
 			Ok(v) => { // partial read; partially write
 				if let Err(e) = output.write(&buf[..v]) {
-					break ioerr(&argv[0], e);
+					break err(&argv[0], e, EX_IOERR);
 				}
 			},
-			Err(e) => break oserr(&argv[0], e)
+			Err(e) => break err(&argv[0], e, EX_OSERR)
 		}
 	}
 }