# tmux_identity:observe/1

- **Package:** libtmux_erlang
- **Language:** Erlang
- **Kind:** function
- **Source:** https://github.com/libtmux/libtmux-erlang/blob/d1b6308440cf9eb8f6647e7ae434bce60e849368/apps/libtmux_erlang/src/tmux_identity.erl#L79
- **Page:** https://libtmux.org/en/erlang/latest/reference/tmux_identity-observe-1/

```
observe/1
-spec observe(pos_integer()) -> {ok, t()} | {error, map()}.
```

Observe a Linux PID incarnation without signalling it. Returns a tagged error if the process cannot be identified; this performs local operating-system I/O.

## Parameters

- `Pid` (`pos_integer()`)