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)
                /* Annotate the "checkFile" error. */
                return (callback(new verror.VError(
                    err, 'request failed')));

        /* ... */
        return (callback());
});

}

handleRequest('/nonexistent', function (err) {

    if (err) {
            console.log(err.message);
            console.log(extsprintf.sprintf('%r', err));
    }

/* ... */

});