# test.TestServer.daemon_pid

- **Module:** test.TestServer
- **Package:** libtmux
- **Language:** Rust
- **Kind:** method
- **Source:** https://github.com/libtmux/libtmux-rs/blob/f0e37052c232636b61d095817046e6bfc8f2ca40/crates/libtmux/src/test.rs#L830
- **Page:** https://libtmux.org/en/rs/latest/reference/test-testserver-daemon_pid/

```
test.TestServer.daemon_pid(self) -> u32
```

Return the retained foreground daemon PID.

This is the PID captured at spawn time, not a liveness probe.

## Example

```rust
let guard = libtmux::test::TestServer::new().await?;
assert!(guard.daemon_pid() > 1);
guard.shutdown().await?;
```