https://github.com/mnutt/redirect-stdio

https://github.com/mnutt/redirect-stdio

Last synced: about 2 months ago
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• Host: GitHub
• URL: https://github.com/mnutt/redirect-stdio
• Owner: mnutt
• License: mit
• Created: 2023-09-24T18:49:45.000Z (over 1 year ago)
• Default Branch: main
• Last Pushed: 2023-09-24T18:57:04.000Z (over 1 year ago)
• Last Synced: 2024-04-08T15:46:08.311Z (9 months ago)
• Language: JavaScript
• Size: 5.86 KB
• Stars: 0
• Watchers: 1
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE.md

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README

        
# redirect-stdio

Utilities for redirecting node process stdout and stderr.

Note: Only works on MacOS and Linux.

## Motivation

Imagine you have a node app that logs to stdout and a bash script that

runs your node process like this:

```

node myapp.js >> access.log

```

Later, you want to add logrotate, which moves `access.log` to

`access.log.2` and then calls `SIGUSR2` on your node process. But your

node process is logging to stdout, and can't exactly "reopen"

`process.stdout`.

With `redirect-stio`, you can:

* use `pathFromFd` to find where your process's stdout is actually going

* on `SIGUSR2`, re-open the log path you just found, and write that file

descriptor over the old one to rotate logs

## Usage

```javascript

const { reopenStdout, reopenStderr } = require('redirect-stdio');

process.on('SIGUSR2', function() {

  reopenStdout();

  reopenStderr();

});

```

## License

Copyright 2023 Movable, Inc. See LICENSE.md.