--- /dev/null
+var extsprintf = require('extsprintf');
+var fs = require('fs');
+var verror = require('../lib/verror');
+
+function checkFile(filename, callback) {
+ fs.stat(filename, function (err) {
+ if (err)
+ /* Annotate the "stat" error with what we were doing. */
+ return (callback(new verror.VError(err,
+ 'failed to check "%s"', filename)));
+
+ /* ... */
+ return (callback());
+ });
+}
+
+function handleRequest(filename, callback) {
+ checkFile('/nonexistent', function (err) {
+ if (err)
+ /* Wrap the "checkFile" error. */
+ return (callback(new verror.WError(
+ err, 'request failed')));
+
+ /* ... */
+ return (callback());
+ });
+}
+
+handleRequest('/nonexistent', function (err) {
+ if (err) {
+ console.log(err.message);
+ console.log(err.toString());
+ }
+});