# types.RunOptions.signal

- **Module:** types
- **Package:** libtmux
- **Language:** TypeScript
- **Kind:** property
- **Source:** https://github.com/libtmux/libtmux-ts/blob/ad09eaef7ffff40f510989ee0695852c44a31576/packages/libtmux/src/types.ts#L618
- **Page:** https://libtmux.org/en/ts/latest/reference/types-runoptions-signal/

Stop the program when this fires; the call rejects with [`TmuxTransportError`](/en/ts/latest/reference/errors-tmuxtransporterror/) of kind `cancelled`, the signal's reason as its [`cause`](/en/ts/latest/reference/errors-exceptionoptions-cause/). Its `delivery` is [`written`](/en/ts/latest/reference/selection-clientwhere-written/) once the program had started, which may have done part of its work, and as for [`SpawnOptions.signal`](/en/ts/latest/reference/types-spawnoptions-signal/) before.