source: trip-planner-front/node_modules/execa/lib/errname.js@ e29cc2e

'use strict';
// Older verions of Node.js might not have `util.getSystemErrorName()`.
// In that case, fall back to a deprecated internal.
const util = require('util');

let uv;

if (typeof util.getSystemErrorName === 'function') {
        module.exports = util.getSystemErrorName;
} else {
        try {
                uv = process.binding('uv');

                if (typeof uv.errname !== 'function') {
                        throw new TypeError('uv.errname is not a function');
                }
        } catch (err) {
                console.error('execa/lib/errname: unable to establish process.binding(\'uv\')', err);
                uv = null;
        }

        module.exports = code => errname(uv, code);
}

// Used for testing the fallback behavior
module.exports.__test__ = errname;

function errname(uv, code) {
        if (uv) {
                return uv.errname(code);
        }

        if (!(code < 0)) {
                throw new Error('err >= 0');
        }

        return `Unknown system error ${code}`;
}