1 files changed, 22 insertions, 0 deletions

diff --git a/src/tmux.rs b/src/tmux.rs
index e3efbd5..b1f1af2 100644
--- a/src/tmux.rs
+++ b/src/tmux.rs
@@ -13,6 +13,9 @@ pub struct Tmux {
     /// tmux socket-name, equivelent to `tmux -L <socket-name>`
     #[arg(short = 'L', long = "tmux_socket", default_value = "ssh")]
     pub socket: String,
+
+    #[arg(short = 'E', long)]
+    pub exclude_attached: bool,
 }
 
 impl Tmux {
@@ -34,6 +37,24 @@ impl Tmux {
             .collect::<Result<_, _>>()
             .map_err(Into::into)
     }
+
+    pub fn attached(&self) -> Result<Session, Error> {
+        let stdout = Command::new("tmux")
+            .arg("-L")
+            .arg(&self.socket)
+            .arg("display")
+            .arg("-p")
+            .arg(Self::SESSION_FORMAT)
+            .output()?
+            .stdout;
+
+        std::str::from_utf8(&stdout)?
+            .lines()
+            .map(ron::from_str)
+            .last()
+            .transpose()?
+            .ok_or(Error::NotFound)
+    }
 }
 
 #[cfg(test)]
@@ -59,6 +80,7 @@ mod tests {
 
         let tmux = Tmux {
             socket: SOCKET.to_owned(),
+            exclude_attached: false,
         };
         let sessions: Vec<_> = tmux.list()?.into_iter().map(|s| s.name).collect();