detect when the wifi device is soft/hard blocked

Author: pythops

src/lib.rs

@@ -29,3 +29,5 @@ pub mod adapter;
 pub mod access_point;
 
 pub mod cli;
+
+pub mod rfkill;

src/main.rs

@@ -1,10 +1,10 @@
 use impala::app::{App, AppResult};
-use impala::cli;
 use impala::config::Config;
 use impala::event::{Event, EventHandler};
 use impala::handler::handle_key_events;
 use impala::help::Help;
 use impala::tui::Tui;
+use impala::{cli, rfkill};
 use iwdrs::modes::Mode;
 use ratatui::backend::CrosstermBackend;
 use ratatui::Terminal;
@@ -15,6 +15,8 @@ use std::sync::Arc;
 async fn main() -> AppResult<()> {
     let args = cli::cli().get_matches();
 
+    rfkill::check()?;
+
     let config = Arc::new(Config::new());
 
     let help = Help::new(config.clone());

src/rfkill.rs

@@ -0,0 +1,42 @@
+use std::fs;
+
+use crate::app::AppResult;
+
+pub fn check() -> AppResult<()> {
+    let entries = fs::read_dir("/sys/class/rfkill/")?;
+
+    for entry in entries {
+        let entry = entry?;
+        let entry_path = entry.path();
+
+        if let Some(_file_name) = entry_path.file_name() {
+            let name = fs::read_to_string(entry_path.join("type"))?;
+
+            if name.trim() == "wlan" {
+                let state_path = entry_path.join("state");
+                let state = fs::read_to_string(state_path)?.trim().parse::<u8>()?;
+
+                // https://www.kernel.org/doc/Documentation/ABI/stable/sysfs-class-rfkill
+                match state {
+                    0 => {
+                        eprintln!(
+                            r#"
+The wifi device is soft blocked
+Run the following command to unblock it
+$ sudo rfkill unblock wlan
+                    "#
+                        );
+                        std::process::exit(1);
+                    }
+                    2 => {
+                        eprintln!("The wifi device is hard blocked");
+                        std::process::exit(1);
+                    }
+                    _ => {}
+                }
+                break;
+            }
+        }
+    }
+    Ok(())
+}