github.com/emc-advanced-dev/unik@v0.0.0-20190717152701-a58d3e8e33b7/containers/compilers/rump/nodejs/node-wrapper/node_modules/macaddress/lib/unix.js (about)

     1  var exec = require('child_process').exec;
     2  
     3  module.exports = function (iface, callback) {
     4      exec("ifconfig " + iface, function (err, out) {
     5          if (err) {
     6              callback(err, null);
     7              return;
     8          }
     9          var match = /[a-f0-9]{2}(:[a-f0-9]{2}){5}/.exec(out.toLowerCase());
    10          if (!match) {
    11              callback("did not find a mac address", null);
    12              return;
    13          }
    14          callback(null, match[0].toLowerCase());
    15      });
    16  };