RawDevice: introduce system_path() method

src/raw_stream.rs

@@ -2,7 +2,7 @@ use std::fs::{File, OpenOptions};
 use std::io::Write;
 use std::mem::MaybeUninit;
 use std::os::unix::io::{AsRawFd, RawFd};
-use std::path::Path;
+use std::path::{Path, PathBuf};
 use std::{io, mem};
 
 use crate::constants::*;
@@ -68,6 +68,7 @@ pub struct RawDevice {
     supported_snd: Option<AttributeSet<SoundType>>,
     pub(crate) event_buf: Vec<libc::input_event>,
     grabbed: bool,
+    system_path: PathBuf,
 }
 
 #[derive(Debug, Clone)]
@@ -225,6 +226,7 @@ impl RawDevice {
             auto_repeat,
             event_buf: Vec::new(),
             grabbed: false,
+            system_path: path.to_path_buf(),
         })
     }
 
@@ -383,6 +385,11 @@ impl RawDevice {
         self.supported_snd.as_deref()
     }
 
+    /// Returns the system path used to open the device.
+    pub fn system_path(&self) -> &Path {
+        self.system_path.as_ref()
+    }
+
     /// Read a maximum of `num` events into the internal buffer. If the underlying fd is not
     /// O_NONBLOCK, this will block.
     ///