commit 5b686e38c465cd130039ca864be278573c9f3c79
Author: Yigid BALABAN <fyb@fybx.dev>
Date:   Sat Apr 5 00:50:12 2025 +0300

    Initial commit for rewrite

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diff --git a/Cargo.toml b/Cargo.toml
new file mode 100644
index 0000000..4bc0b6b
--- /dev/null
+++ b/Cargo.toml
@@ -0,0 +1,18 @@
+cargo-features = ["edition2024"]
+
+[package]
+name = "rpi-fan-control-oxidized"
+version = "0.1.0"
+edition = "2021"
+authors = ["Yigid BALABAN <fyb@fybx.dev>"]
+description = "A Raspberry Pi fan controller written in Rust"
+license = "MIT"
+repository = "https://github.com/fybx/rpi-fan-control-oxidized"
+
+[dependencies]
+libgpiod = "0.2.2"
+serde = { version = "1.0", features = ["derive"] }
+toml = "0.8"
+log = "0.4"
+simplelog = "0.12"
+ctrlc = "3.4"
diff --git a/default.nix b/default.nix
new file mode 100644
index 0000000..594babf
--- /dev/null
+++ b/default.nix
@@ -0,0 +1,16 @@
+{ pkgs ? import <nixpkgs> { } }:
+pkgs.rustPlatform.buildRustPackage rec {
+  pname = "rpi-fan-control";
+  version = "0.1";
+  cargoLock.lockFile = ./Cargo.lock;
+  src = pkgs.lib.cleanSource ./.;
+
+  nativeBuildInputs = with pkgs; [
+    pkg-config
+    rustPlatform.bindgenHook
+  ];
+
+  buildInputs = with pkgs; [
+    libgpiod
+  ];
+}
\ No newline at end of file
diff --git a/example_configuration.toml b/example_configuration.toml
new file mode 100644
index 0000000..d3d815b
--- /dev/null
+++ b/example_configuration.toml
@@ -0,0 +1,8 @@
+# Fan control daemon configuration
+temp_path = "/sys/class/thermal/thermal_zone0/temp"
+gpio_line = 17
+gpio_chip = 0
+log_path = "/var/log/fan_control.log"
+threshold = 55.0    # Temperature threshold in Celsius
+variance = 5.0      # Hysteresis variance in Celsius
+interval_ms = 1500  # Temperature checking interval in milliseconds
\ No newline at end of file
diff --git a/src/config.rs b/src/config.rs
new file mode 100644
index 0000000..724e925
--- /dev/null
+++ b/src/config.rs
@@ -0,0 +1,58 @@
+use serde::Deserialize;
+use std::fs;
+use std::path::Path;
+
+#[derive(Debug, Deserialize)]
+pub struct Config {
+    #[serde(default = "default_temp_path")]
+    pub temp_path: String,
+
+    #[serde(default = "default_gpio_line")]
+    pub gpio_line: u32,
+
+    #[serde(default = "default_gpio_chip")]
+    pub gpio_chip: String,
+
+    #[serde(default = "default_log_path")]
+    pub log_path: String,
+
+    #[serde(default = "default_threshold")]
+    pub threshold: f32,
+
+    #[serde(default = "default_variance")]
+    pub variance: f32,
+
+    #[serde(default = "default_interval_ms")]
+    pub interval_ms: u64,
+}
+
+fn default_temp_path() -> String {
+    String::from("/sys/class/thermal/thermal_zone0/temp")
+}
+
+fn default_gpio_line() -> u32 { 17 }
+fn default_gpio_chip() -> String { String::from("/dev/gpiochip0") }
+fn default_log_path() -> String { String::from("/var/log/fan_control.log") }
+fn default_threshold() -> f32 { 55.0 }
+fn default_variance() -> f32 { 5.0 }
+fn default_interval_ms() -> u64 { 1500 }
+
+impl Config {
+    pub fn load(config_path: &str) -> Result<Self, Box<dyn std::error::Error>> {
+        if Path::new(config_path).exists() {
+            let contents = fs::read_to_string(config_path)?;
+            let config: Config = toml::from_str(&contents)?;
+            Ok(config)
+        } else {
+            Ok(Config {
+                temp_path: default_temp_path(),
+                gpio_line: default_gpio_line(),
+                gpio_chip: default_gpio_chip(),
+                log_path: default_log_path(),
+                threshold: default_threshold(),
+                variance: default_variance(),
+                interval_ms: default_interval_ms(),
+            })
+        }
+    }
+}
\ No newline at end of file
diff --git a/src/fan.rs b/src/fan.rs
new file mode 100644
index 0000000..8f0253c
--- /dev/null
+++ b/src/fan.rs
@@ -0,0 +1,82 @@
+use log::info;
+use std::io;
+use libgpiod::line;
+use libgpiod::line::{Direction, Value};
+use libgpiod::request::Request;
+
+pub struct FanController {
+    gpio_line: Request,
+    line_num: u32,
+    is_running: bool,
+}
+
+#[allow(clippy::wrong_self_convention)]
+impl FanController {
+    // Helper method to convert libgpiod errors to io::Error
+    fn to_io_error<E>(err: E) -> io::Error 
+    where 
+        E: std::error::Error + Send + Sync + 'static
+    {
+        io::Error::new(io::ErrorKind::Other, err)
+    }
+
+    pub fn new(chip_path: String, line_num: u32) -> Result<Self, io::Error> {
+        let mut settings = line::Settings::new()
+            .map_err(Self::to_io_error)?;
+        settings
+            .set_direction(Direction::Output)
+            .map_err(Self::to_io_error)?
+            .set_output_value(Value::InActive)
+            .map_err(Self::to_io_error)?; // Ensure fan is off initially
+
+        let mut lconfig = line::Config::new()
+            .map_err(Self::to_io_error)?;
+        lconfig.add_line_settings(&[line_num], settings)
+            .map_err(Self::to_io_error)?;
+
+        let mut rconfig = libgpiod::request::Config::new()
+            .map_err(Self::to_io_error)?;
+        rconfig.set_consumer("toggle-line-value")
+            .map_err(Self::to_io_error)?;
+
+        let chip = libgpiod::chip::Chip::open(&chip_path)
+            .map_err(Self::to_io_error)?;
+        let request = chip.request_lines(Some(&rconfig), &lconfig)
+            .map_err(Self::to_io_error)?;
+
+        Ok(FanController {
+            gpio_line: request,
+            line_num,
+            is_running: false,
+        })
+    }
+
+    pub fn update(&mut self, temperature: f32, threshold: f32, variance: f32) -> Result<(), io::Error> {
+        if !self.is_running && temperature >= threshold + variance {
+            self.gpio_line.set_value(self.line_num, Value::Active)
+                .map_err(Self::to_io_error)?;
+            self.is_running = true;
+            info!("Setting pin GPIO17 to HIGH");
+        } else if self.is_running {
+            if temperature <= threshold - variance {
+                self.gpio_line.set_value(self.line_num, Value::InActive)
+                    .map_err(Self::to_io_error)?;
+                self.is_running = false;
+                info!("Setting pin GPIO17 to LOW");
+            } else {
+                info!("Pin GPIO17 is already HIGH");
+            }
+        }
+
+        Ok(())
+    }
+}
+
+impl Drop for FanController {
+    fn drop(&mut self) {
+        // Ensure fan is turned off when program exits
+        if let Err(e) = self.gpio_line.set_value(self.line_num, Value::InActive) {
+            eprintln!("Failed to turn off fan during shutdown: {}", e);
+        }
+    }
+}
diff --git a/src/main.rs b/src/main.rs
new file mode 100644
index 0000000..2d739ff
--- /dev/null
+++ b/src/main.rs
@@ -0,0 +1,84 @@
+mod config;
+mod temperature;
+mod fan;
+
+use config::Config;
+use temperature::TemperatureMonitor;
+use fan::FanController;
+use log::{info, error, LevelFilter};
+use simplelog::{WriteLogger, Config as LogConfig};
+use std::{fs::File, thread, time::Duration};
+use std::process;
+use std::sync::{Arc, atomic::{AtomicBool, Ordering}};
+
+fn main() {
+    // Set up signal handling for clean shutdown
+    let running = Arc::new(AtomicBool::new(true));
+    let r = running.clone();
+
+    ctrlc::set_handler(move || {
+        info!("Received shutdown signal, exiting...");
+        r.store(false, Ordering::SeqCst);
+    }).expect("Error setting Ctrl-C handler");
+
+    // Load configuration
+    let config_path = "fan_control_config.toml";
+    let config = match Config::load(config_path) {
+        Ok(config) => config,
+        Err(e) => {
+            eprintln!("Error loading configuration: {}", e);
+            process::exit(1);
+        }
+    };
+
+    // Initialize logging
+    if let Err(e) = WriteLogger::init(
+        LevelFilter::Info,
+        LogConfig::default(),
+        File::create(&config.log_path).unwrap_or_else(|_| {
+            eprintln!("Failed to open log file, logging to stdout");
+            process::exit(1);
+        }),
+    ) {
+        eprintln!("Failed to initialize logger: {}", e);
+        process::exit(1);
+    }
+
+    info!("Fan control daemon starting");
+    info!("Configuration: temperature path={}, GPIO chip={}, GPIO line={}, threshold={}°C, variance={}°C",
+        config.temp_path, config.gpio_chip, config.gpio_line, config.threshold, config.variance);
+
+    // Initialize temperature monitor
+    let temp_monitor = TemperatureMonitor::new(config.temp_path);
+
+    // Initialize fan controller
+    let mut fan_controller = match FanController::new(config.gpio_chip, config.gpio_line) {
+        Ok(controller) => controller,
+        Err(e) => {
+            error!("Failed to initialize fan controller: {}", e);
+            process::exit(1);
+        }
+    };
+
+    // Main loop
+    info!("Entering main control loop");
+    while running.load(Ordering::SeqCst) {
+        // Read temperature
+        match temp_monitor.read_celsius() {
+            Ok(temperature) => {
+                // Update fan state based on temperature
+                if let Err(e) = fan_controller.update(temperature, config.threshold, config.variance) {
+                    error!("Failed to update fan state: {}", e);
+                }
+            },
+            Err(e) => {
+                error!("Failed to read temperature: {}", e);
+            }
+        }
+
+        // Sleep for the configured interval
+        thread::sleep(Duration::from_millis(config.interval_ms));
+    }
+
+    info!("Fan control daemon shutting down");
+}
\ No newline at end of file
diff --git a/src/temperature.rs b/src/temperature.rs
new file mode 100644
index 0000000..f968144
--- /dev/null
+++ b/src/temperature.rs
@@ -0,0 +1,21 @@
+use std::fs;
+use std::io;
+
+pub struct TemperatureMonitor {
+    temp_path: String,
+}
+
+impl TemperatureMonitor {
+    pub fn new(temp_path: String) -> Self {
+        TemperatureMonitor { temp_path }
+    }
+
+    pub fn read_celsius(&self) -> Result<f32, io::Error> {
+        let temp_str = fs::read_to_string(&self.temp_path)?;
+        let temp_millicelsius = temp_str.trim().parse::<u32>()
+            .map_err(|e| io::Error::new(io::ErrorKind::InvalidData, e))?;
+
+        // Convert millidegrees to degrees
+        Ok(temp_millicelsius as f32 / 1000.0)
+    }
+}
\ No newline at end of file