# LibTmux.Query.Client.pid

- **Package:** libtmux-haskell
- **Language:** Haskell
- **Kind:** function
- **Source:** https://github.com/libtmux/libtmux-haskell/blob/663e212622a02aa74a9bdc8ff71e2b45fcb1d4d5/src/LibTmux/Query/Client.hs#L21
- **Page:** https://libtmux.org/en/haskell/latest/reference/libtmux-query-client-v-pid/

```haskell
pid :: Field Client Integer
```

Signature types: [`Field`](/en/haskell/latest/reference/libtmux-query-t-field/), [`Client`](/en/haskell/latest/reference/libtmux-snapshot-t-client/), [`Integer`](https://hackage.haskell.org/package/base-4.22.0.0/docs/Prelude.html#t:Integer).

Positive operating-system process ID, for observation rather than signalling.

## Referenced declarations

- [`LibTmux.Snapshot.Client`](/en/haskell/latest/reference/libtmux-snapshot-t-client/) (data type)
- [`LibTmux.Query.Field`](/en/haskell/latest/reference/libtmux-query-t-field/) (data type)