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156 lines
4.6 KiB
Markdown
156 lines
4.6 KiB
Markdown
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[](https://codecov.io/gh/ehmicky/human-signals)
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[](https://travis-ci.org/ehmicky/human-signals)
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[](https://www.npmjs.com/package/human-signals)
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[](https://gitter.im/ehmicky/human-signals)
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[](https://twitter.com/intent/follow?screen_name=ehmicky)
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[](https://medium.com/@ehmicky)
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Human-friendly process signals.
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This is a map of known process signals with some information about each signal.
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Unlike
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[`os.constants.signals`](https://nodejs.org/api/os.html#os_signal_constants)
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this includes:
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- human-friendly [descriptions](#description)
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- [default actions](#action), including whether they [can be prevented](#forced)
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- whether the signal is [supported](#supported) by the current OS
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# Example
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```js
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const { signalsByName, signalsByNumber } = require('human-signals')
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console.log(signalsByName.SIGINT)
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// {
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// name: 'SIGINT',
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// number: 2,
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// description: 'User interruption with CTRL-C',
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// supported: true,
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// action: 'terminate',
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// forced: false,
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// standard: 'ansi'
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// }
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console.log(signalsByNumber[8])
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// {
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// name: 'SIGFPE',
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// number: 8,
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// description: 'Floating point arithmetic error',
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// supported: true,
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// action: 'core',
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// forced: false,
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// standard: 'ansi'
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// }
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```
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# Install
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```bash
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npm install human-signals
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```
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# Usage
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## signalsByName
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_Type_: `object`
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Object whose keys are signal [names](#name) and values are
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[signal objects](#signal).
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## signalsByNumber
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_Type_: `object`
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Object whose keys are signal [numbers](#number) and values are
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[signal objects](#signal).
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## signal
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_Type_: `object`
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Signal object with the following properties.
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### name
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_Type_: `string`
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Standard name of the signal, for example `'SIGINT'`.
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### number
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_Type_: `number`
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Code number of the signal, for example `2`. While most `number` are
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cross-platform, some are different between different OS.
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### description
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_Type_: `string`
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Human-friendly description for the signal, for example
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`'User interruption with CTRL-C'`.
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### supported
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_Type_: `boolean`
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Whether the current OS can handle this signal in Node.js using
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[`process.on(name, handler)`](https://nodejs.org/api/process.html#process_signal_events).
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The list of supported signals
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[is OS-specific](https://github.com/ehmicky/cross-platform-node-guide/blob/master/docs/6_networking_ipc/signals.md#cross-platform-signals).
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### action
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_Type_: `string`<br>_Enum_: `'terminate'`, `'core'`, `'ignore'`, `'pause'`,
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`'unpause'`
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What is the default action for this signal when it is not handled.
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### forced
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_Type_: `boolean`
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Whether the signal's default action cannot be prevented. This is `true` for
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`SIGTERM`, `SIGKILL` and `SIGSTOP`.
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### standard
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_Type_: `string`<br>_Enum_: `'ansi'`, `'posix'`, `'bsd'`, `'systemv'`, `'other'`
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Which standard defined that signal.
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# Support
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If you found a bug or would like a new feature, _don't hesitate_ to
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[submit an issue on GitHub](../../issues).
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For other questions, feel free to
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[chat with us on Gitter](https://gitter.im/ehmicky/human-signals).
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Everyone is welcome regardless of personal background. We enforce a
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[Code of conduct](CODE_OF_CONDUCT.md) in order to promote a positive and
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inclusive environment.
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# Contributing
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This project was made with ❤️. The simplest way to give back is by starring and
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sharing it online.
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If the documentation is unclear or has a typo, please click on the page's `Edit`
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button (pencil icon) and suggest a correction.
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If you would like to help us fix a bug or add a new feature, please check our
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[guidelines](CONTRIBUTING.md). Pull requests are welcome!
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<!-- Thanks go to our wonderful contributors: -->
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<!-- ALL-CONTRIBUTORS-LIST:START -->
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<!-- prettier-ignore -->
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<table><tr><td align="center"><a href="https://twitter.com/ehmicky"><img src="https://avatars2.githubusercontent.com/u/8136211?v=4" width="100px;" alt="ehmicky"/><br /><sub><b>ehmicky</b></sub></a><br /><a href="https://github.com/ehmicky/human-signals/commits?author=ehmicky" title="Code">💻</a> <a href="#design-ehmicky" title="Design">🎨</a> <a href="#ideas-ehmicky" title="Ideas, Planning, & Feedback">🤔</a> <a href="https://github.com/ehmicky/human-signals/commits?author=ehmicky" title="Documentation">📖</a></td></tr></table>
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<!-- ALL-CONTRIBUTORS-LIST:END -->
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