fix: use tty command instead of reading /dev/tty link for TTY meta plugin

Co-authored-by: aider (openai/andrew.openrouter.qwen.qwen3-coder) <aider@aider.chat>

src/meta_plugin/system.rs

@@ -373,6 +373,16 @@ impl TtyMetaPlugin {
 }
 
 impl MetaPlugin for TtyMetaPlugin {
+    fn is_supported(&self) -> bool {
+        // Check if the 'tty' command is available
+        std::process::Command::new("sh")
+            .arg("-c")
+            .arg("command -v tty")
+            .output()
+            .map(|output| output.status.success())
+            .unwrap_or(false)
+    }
+
     fn create(&self) -> Result<Box<dyn Write>> {
         Ok(Box::new(io::sink()))
     }
@@ -385,9 +395,21 @@ impl MetaPlugin for TtyMetaPlugin {
             }
         }
         
-        // Try to get TTY from /dev/tty (this will give us the current terminal)
-        match std::fs::read_link("/dev/tty") {
-            Ok(path) => Ok(format!("/dev/{}", path.to_string_lossy())),
+        // Use the tty command to get the current terminal
+        match std::process::Command::new("tty").output() {
+            Ok(output) => {
+                if output.status.success() {
+                    let tty_path = String::from_utf8_lossy(&output.stdout);
+                    let trimmed = tty_path.trim();
+                    if trimmed.is_empty() || trimmed == "not a tty" {
+                        Ok("not a tty".to_string())
+                    } else {
+                        Ok(trimmed.to_string())
+                    }
+                } else {
+                    Ok("not a tty".to_string())
+                }
+            }
             Err(_) => Ok("not a tty".to_string()),
         }
     }
@@ -399,4 +421,8 @@ impl MetaPlugin for TtyMetaPlugin {
     fn meta_name(&mut self) -> String {
         self.meta_name.clone()
     }
+    
+    fn program_info(&self) -> Option<(&str, Vec<&str>)> {
+        Some(("tty", vec![]))
+    }
 }