childProcess.exec(cmd, (error, stdout, stderr) => {
clearTimeout(failTimer);
if (error) {
return temp.reject(error);
}
if (stderr) {
if (dfu._missingDevicePermissions(stderr) && systemSupportsUdev()) {
const error = new Error('Missing permissions to use DFU');
return promptAndInstallUdevRules(error).then(() => temp.reject(error), e => temp.reject(e));
}
}
// find DFU devices that match specs
stdout = stdout || '';
let dfuIds = dfu._dfuIdsFromDfuOutput(stdout);
let dfuDevices = dfuIds.map((d) => {
return {
type: specs[d].productName,
dfuId: d,
specs: specs[d]
};
});
temp.resolve(dfuDevices);
});
return promptAndInstallUdevRules(error).then(() => temp.reject(error), e => temp.reject(e));