From 951df26618973a74d8c68a80634f965c23ba0734 Mon Sep 17 00:00:00 2001
From: Philipp Gesang <phg@phi-gamma.net>
Date: Sun, 12 Dec 2021 00:42:47 +0100
Subject: =?UTF-8?q?bin:=20implement=20=E2=80=9Cleds=20set=E2=80=9D=20subco?=
 =?UTF-8?q?mmand?=
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Currently only supports setting the raw state from an integer
value:

    $ vtcol leds set -8 2
---
 src/lib.rs | 28 +++++++++++++++++++++++++++-
 1 file changed, 27 insertions(+), 1 deletion(-)

(limited to 'src/lib.rs')

diff --git a/src/lib.rs b/src/lib.rs
index 2ef43e8..6193277 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -160,7 +160,7 @@ pub mod ioctl
     }
 }
 
-#[derive(Debug)]
+#[derive(Clone, Copy, Debug)]
 pub struct KbLedState(u8);
 
 impl KbLedState
@@ -179,6 +179,12 @@ impl KbLedState
     #[inline]
     pub fn get(con: &Console) -> io::Result<Self> { ioctl::kdgetled(con) }
 
+    #[inline]
+    pub fn set(&self, con: &Console) -> io::Result<()>
+    {
+        ioctl::kdsetled(con, Some(*self))
+    }
+
     #[inline]
     pub fn cap(&self) -> bool { (self.0 & 0x4) != 0 }
 
@@ -221,6 +227,26 @@ impl From<KbLedState> for u8
     fn from(state: KbLedState) -> Self { state.0 }
 }
 
+impl TryFrom<u8> for KbLedState
+{
+    type Error = io::Error;
+
+    fn try_from(val: u8) -> io::Result<Self>
+    {
+        if val <= 0b111 {
+            Ok(Self(val))
+        } else {
+            Err(io::Error::new(
+                io::ErrorKind::Other,
+                format!(
+                    "invalid raw led value: {:#b}; must not exceed 3 b",
+                    val
+                ),
+            ))
+        }
+    }
+}
+
 #[cfg(test)]
 mod kb_led_state
 {
-- 
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