Reduce unwrap in thermal code

src/interface.rs

@@ -77,7 +77,13 @@ impl Getter for Get {
     }
 
     fn thermal(&self, raw: bool) {
-        let zones = read_thermal_zones();
+        let zones = match read_thermal_zones() {
+            Ok(zones) => zones,
+            Err(error) => {
+                println!("Error: {:?}", error);
+                return;
+            }
+        };
         if raw {
             println!("{:?}", zones)
         } else {

src/thermal.rs

@@ -1,5 +1,5 @@
 use super::system::{read_int, read_str};
-use super::Error;
+use crate::error::Error;
 use colored::*;
 use std::fmt::Display;
 use std::fmt::Formatter;
@@ -47,24 +47,23 @@ impl Display for ThermalZone {
     }
 }
 
-pub fn read_thermal_zones() -> Vec<ThermalZone> {
+pub fn read_thermal_zones() -> Result<Vec<ThermalZone>, Error> {
     let mut zones = Vec::<ThermalZone>::new();
 
     for a in read_dir(THERMAL_ZONE_DIR).expect("Could not read thermal directory") {
-        let path_string: String = format!("{}", a.unwrap().path().to_string_lossy());
+        let path_string: String = format!("{}", a?.path().to_string_lossy());
         if !path_string.starts_with(&[THERMAL_ZONE_DIR, "thermal_zone"].concat()) {
             continue;
         }
 
         let mut zone = ThermalZone::default();
 
-        zone.temp = read_int(&[&path_string, "/temp"].concat()).unwrap_or(0);
-        zone.name = read_str(&[&path_string, "/type"].concat()).unwrap_or("unknown".to_string());
-        zone.enabled = read_str(&[&path_string, "/mode"].concat()).unwrap_or("disable".to_string())
-            == "enabled";
+        zone.temp = read_int(&[&path_string, "/temp"].concat())?;
+        zone.name = read_str(&[&path_string, "/type"].concat())?;
+        zone.enabled = read_str(&[&path_string, "/mode"].concat())? == "enabled";
         zone.path = path_string;
 
         zones.push(zone);
     }
-    zones
+    Ok(zones)
 }