Prefer eprintln over println for error messages

1 files changed, 14 insertions, 14 deletions

diff --git a/src/otp.rs b/src/otp.rs
index 6e0379b..abaff66 100644
--- a/src/otp.rs
+++ b/src/otp.rs
@@ -41,10 +41,10 @@ pub trait ConfigureOtp {
     ///     Ok(admin) => {
     ///         match admin.write_hotp_slot(slot_data, 0) {
     ///             Ok(()) => println!("Successfully wrote slot."),
-    ///             Err(err) => println!("Could not write slot: {}", err),
+    ///             Err(err) => eprintln!("Could not write slot: {}", err),
     ///         }
     ///     },
-    ///     Err((_, err)) => println!("Could not authenticate as admin: {}", err),
+    ///     Err((_, err)) => eprintln!("Could not authenticate as admin: {}", err),
     /// }
     /// #     Ok(())
     /// # }
@@ -77,10 +77,10 @@ pub trait ConfigureOtp {
     ///     Ok(admin) => {
     ///         match admin.write_totp_slot(slot_data, 30) {
     ///             Ok(()) => println!("Successfully wrote slot."),
-    ///             Err(err) => println!("Could not write slot: {}", err),
+    ///             Err(err) => eprintln!("Could not write slot: {}", err),
     ///         }
     ///     },
-    ///     Err((_, err)) => println!("Could not authenticate as admin: {}", err),
+    ///     Err((_, err)) => eprintln!("Could not authenticate as admin: {}", err),
     /// }
     /// #     Ok(())
     /// # }
@@ -109,10 +109,10 @@ pub trait ConfigureOtp {
     ///     Ok(admin) => {
     ///         match admin.erase_hotp_slot(1) {
     ///             Ok(()) => println!("Successfully erased slot."),
-    ///             Err(err) => println!("Could not erase slot: {}", err),
+    ///             Err(err) => eprintln!("Could not erase slot: {}", err),
     ///         }
     ///     },
-    ///     Err((_, err)) => println!("Could not authenticate as admin: {}", err),
+    ///     Err((_, err)) => eprintln!("Could not authenticate as admin: {}", err),
     /// }
     /// #     Ok(())
     /// # }
@@ -139,10 +139,10 @@ pub trait ConfigureOtp {
     ///     Ok(admin) => {
     ///         match admin.erase_totp_slot(1) {
     ///             Ok(()) => println!("Successfully erased slot."),
-    ///             Err(err) => println!("Could not erase slot: {}", err),
+    ///             Err(err) => eprintln!("Could not erase slot: {}", err),
     ///         }
     ///     },
-    ///     Err((_, err)) => println!("Could not authenticate as admin: {}", err),
+    ///     Err((_, err)) => eprintln!("Could not authenticate as admin: {}", err),
     /// }
     /// #     Ok(())
     /// # }
@@ -175,7 +175,7 @@ pub trait GenerateOtp {
     /// let time = time::SystemTime::now().duration_since(time::UNIX_EPOCH);
     /// match time {
     ///     Ok(time) => device.set_time(time.as_secs(), false)?,
-    ///     Err(_) => println!("The system time is before the Unix epoch!"),
+    ///     Err(_) => eprintln!("The system time is before the Unix epoch!"),
     /// }
     /// #     Ok(())
     /// # }
@@ -212,8 +212,8 @@ pub trait GenerateOtp {
     /// let device = nitrokey::connect()?;
     /// match device.get_hotp_slot_name(1) {
     ///     Ok(name) => println!("HOTP slot 1: {}", name),
-    ///     Err(Error::CommandError(CommandError::SlotNotProgrammed)) => println!("HOTP slot 1 not programmed"),
-    ///     Err(err) => println!("Could not get slot name: {}", err),
+    ///     Err(Error::CommandError(CommandError::SlotNotProgrammed)) => eprintln!("HOTP slot 1 not programmed"),
+    ///     Err(err) => eprintln!("Could not get slot name: {}", err),
     /// };
     /// #     Ok(())
     /// # }
@@ -241,8 +241,8 @@ pub trait GenerateOtp {
     /// let device = nitrokey::connect()?;
     /// match device.get_totp_slot_name(1) {
     ///     Ok(name) => println!("TOTP slot 1: {}", name),
-    ///     Err(Error::CommandError(CommandError::SlotNotProgrammed)) => println!("TOTP slot 1 not programmed"),
-    ///     Err(err) => println!("Could not get slot name: {}", err),
+    ///     Err(Error::CommandError(CommandError::SlotNotProgrammed)) => eprintln!("TOTP slot 1 not programmed"),
+    ///     Err(err) => eprintln!("Could not get slot name: {}", err),
     /// };
     /// #     Ok(())
     /// # }
@@ -313,7 +313,7 @@ pub trait GenerateOtp {
     ///         let code = device.get_totp_code(1)?;
     ///         println!("Generated TOTP code on slot 1: {}", code);
     ///     },
-    ///     Err(_) => println!("Timestamps before 1970-01-01 are not supported!"),
+    ///     Err(_) => eprintln!("Timestamps before 1970-01-01 are not supported!"),
     /// }
     /// #     Ok(())
     /// # }