2 // Older verions of Node.js might not have `util.getSystemErrorName()`.
3 // In that case, fall back to a deprecated internal.
4 const util = require('util');
8 if (typeof util.getSystemErrorName === 'function') {
9 module.exports = util.getSystemErrorName;
12 uv = process.binding('uv');
14 if (typeof uv.errname !== 'function') {
15 throw new TypeError('uv.errname is not a function');
18 console.error('execa/lib/errname: unable to establish process.binding(\'uv\')', err);
22 module.exports = code => errname(uv, code);
25 // Used for testing the fallback behavior
26 module.exports.__test__ = errname;
28 function errname(uv, code) {
30 return uv.errname(code);
34 throw new Error('err >= 0');
37 return `Unknown system error ${code}`;