deamon finished

.gitignore

@@ -1,2 +1,3 @@
 /target
 /.direnv
+/battery.data

src/main.rs

@@ -2,6 +2,7 @@ use std::{
     error::Error,
     fs,
     io::{Read, Write},
+    os::unix::fs::FileExt,
     thread::sleep,
     time::{Duration, SystemTime},
 };
@@ -30,6 +31,7 @@ fn main() -> Result<(), Box<dyn Error>> {
         Err(err) => {
             let battery_file = fs::OpenOptions::new()
                 .read(true)
+                .write(true)
                 .create(true)
                 .open("./battery.data");
             let new_data = Data::new(battery.as_data().0);
@@ -41,6 +43,7 @@ fn main() -> Result<(), Box<dyn Error>> {
 
     let battery_file = fs::OpenOptions::new()
         .write(true)
+        .append(false)
         .open("./battery.data")
         .unwrap();
     loop {
@@ -57,8 +60,8 @@ fn main() -> Result<(), Box<dyn Error>> {
         };
         data.data_chunks.push(new_chunk);
         let raw_data = rkyv::to_bytes::<rancor::Error>(&data).unwrap();
-        battery_file.try_clone()?.write_all(&raw_data)?;
+        battery_file.try_clone()?.write_all_at(&raw_data, 0)?;
 
-        sleep(Duration::from_secs(3));
+        sleep(Duration::from_secs(5));
     }
 }