userspace: add feature get --config

* fix #2980

userspace/ksud/src/cli.rs

@@ -347,6 +347,9 @@ enum Feature {
     Get {
         /// Feature ID or name (su_compat, kernel_umount)
         id: String,
+        /// Read from config file
+        #[arg(long, default_value_t = false)]
+        config: bool,
     },
 
     /// Set feature value
@@ -620,7 +623,13 @@ pub fn run() -> Result<()> {
         },
 
         Commands::Feature { command } => match command {
-            Feature::Get { id } => crate::feature::get_feature(&id),
+            Feature::Get { id, config } => {
+                if config {
+                    crate::feature::get_feature_config(&id)
+                } else {
+                    crate::feature::get_feature(&id)
+                }
+            }
             Feature::Set { id, value } => crate::feature::set_feature(&id, value),
             Feature::List => {
                 crate::feature::list_features();

userspace/ksud/src/feature.rs

@@ -198,6 +198,28 @@ pub fn get_feature(id: &str) -> Result<()> {
     Ok(())
 }
 
+pub fn get_feature_config(id: &str) -> Result<()> {
+    let feature_id = parse_feature_id(id)?;
+
+    let features = load_binary_config()?;
+    let id_u32 = feature_id as u32;
+
+    println!("Feature: {} ({})", feature_id.name(), id_u32);
+    println!("Description: {}", feature_id.description());
+
+    if let Some(value) = features.get(&id_u32) {
+        println!("Value: {value}");
+        println!(
+            "Status: {}",
+            if *value != 0 { "enabled" } else { "disabled" }
+        );
+    } else {
+        println!("Not set in config");
+    }
+
+    Ok(())
+}
+
 pub fn set_feature(id: &str, value: u64) -> Result<()> {
     let feature_id = parse_feature_id(id)?;