# libtmux:client-open-p

- **Package:** libtmux
- **Language:** Common Lisp
- **Kind:** function
- **Source:** https://github.com/libtmux/libtmux-lisp/blob/c2e5fc4ed3befda21f45dfa5d5868c38fd138311/src/client.lisp#L80
- **Public owner:** libtmux
- **Page:** https://libtmux.org/en/lisp/latest/reference/libtmux-client-open-p/

```
(client-open-p client)
```

Return whether CLIENT's lifecycle is open; no tmux I/O.
An active operation may still cause CLIENT-BUSY when new work is attempted.

## Parameters

- `client`