Disabled root check, added guide for rootless config

Cargo.toml

@@ -5,7 +5,6 @@ edition = "2021"
 
 [dependencies]
 libloading = "0.8.5"
-libc = "0.2.158"
 hidapi = "2.6.3"
 cpu-monitor = "0.1.1"
 clap = { version = "4.5.16", features = ["derive"] }

README.md

@@ -97,6 +97,27 @@ Options:
 
 ```
 
+### Rootless mode
+If you need to run the program without root privilege, you can create a `udev` rule to access all necessary resources as a user.
+
+1. Locate your directory, it can be `/lib/udev/rules.d` or `/etc/udev/rules.d`.
+```bash
+cd /lib/udev/rules.d
+```
+2. Create a new file called `99-deepcool-digital.rules`.
+```bash
+sudo nano 99-deepcool-digital.rules
+```
+3. Copy the contents:
+```bash
+# Intel RAPL energy usage file
+ACTION=="add", SUBSYSTEM=="powercap", KERNEL=="intel-rapl:0", RUN+="/bin/chmod 444 /sys/class/powercap/intel-rapl/intel-rapl:0/energy_uj"
+
+# DeepCool HID raw devices
+SUBSYSTEM=="hidraw", ATTRS{idVendor}=="3633", MODE="0666"
+```
+4. Reboot your computer.
+
 # Automatic start
 
 ## Systemd (Arch, Debian, Ubuntu, Fedora, etc.)
@@ -125,7 +146,7 @@ sudo systemctl enable deepcool-digital
 ```
 *Note: The program will run automatically after the next boot.*
 
-## OpenRC (Gentoo)
+## OpenRC (Gentoo, Artix Linux, etc.)
 1. Copy the `deepcool-digital-linux` to the `/usr/sbin/` folder.
 ```bash
 sudo cp ./deepcool-digital-linux /usr/sbin/

src/main.rs

@@ -3,7 +3,6 @@ mod monitor;
 
 use clap::Parser;
 use hidapi::HidApi;
-use libc::geteuid;
 use std::process::exit;
 
 const VENDOR: u16 = 0x3633;
@@ -25,14 +24,6 @@ struct Args {
 }
 
 fn main() {
-    // Check root
-    unsafe {
-        if geteuid() != 0 {
-            println!("Try to run the program as root!");
-            exit(1);
-        }
-    }
-
     // Read args
     let args = Args::parse();
     if !["temp", "usage", "auto"].contains(&args.mode.as_str()) {