1 files changed, 45 insertions, 0 deletions
diff --git a/src/power/sys/linux.rs b/src/power/sys/linux.rs
new file mode 100644
index 0000000..670498a
--- /dev/null
+++ b/src/power/sys/linux.rs
@@ -0,0 +1,45 @@
+use walkdir;
+
+pub fn power_supplies() -> Vec<super::PowerSupplyInfo> {
+    let mut power_supplies = vec![];
+    for entry in walkdir::WalkDir::new("/sys/class/power_supply/")
+        .min_depth(1)
+        .max_depth(1)
+        .follow_links(true)
+    {
+        let entry = entry.unwrap();
+
+        let name = entry
+            .path()
+            .file_name()
+            .unwrap()
+            .to_string_lossy()
+            .into_owned();
+        let ty = super::super::slurp(entry.path().join("type"))
+            .map(|t: String| super::PowerSupplyType::from_str(&t))
+            .expect("couldn't find power supply type");
+        let energy_full = super::super::slurp(entry.path().join("energy_full"));
+        let energy_now = super::super::slurp(entry.path().join("energy_now"));
+        let online =
+            super::super::slurp(entry.path().join("online")).map(|n: u8| n != 0);
+
+        power_supplies.push(super::PowerSupplyInfo {
+            name,
+            ty,
+            energy_now,
+            energy_full,
+            online,
+        })
+    }
+    power_supplies
+}
+
+impl super::PowerSupplyType {
+    fn from_str(ty: &str) -> Self {
+        match ty {
+            "Mains" => super::PowerSupplyType::AC,
+            "Battery" => super::PowerSupplyType::Battery,
+            _ => panic!("unknown power supply type {}", ty),
+        }
+    }
+}