Only one backend being written to

[jefferai]

This is almost certainly me doing something wrong. :-)

I'm setting two backends: one to stdout, one to a file. The file is successfully created and opened, but nothing is ever logged to it -- only to stdout. My simplified code looks like this:

var (
    logger                  = logging.MustGetLogger("aiab")
)

func main() {
    stdOutBackend := logging.NewLogBackend(os.Stdout, "", 0)
    logFileBaseName := "aiab-" + time.Now().Format(time.RFC3339)
    logFileName := os.Getenv("AIAB_LOGS") + "/" + logFileBaseName
    logFile, err := os.OpenFile(logFileName, os.O_APPEND|os.O_CREATE, 0664)
    if err != nil {
        panic("Could not open log file: " + err.Error())
    }
    logFileBackend := logging.NewLogBackend(logFile, "", 0)
    logging.SetBackend(stdOutBackend, logFileBackend)
    logging.SetFormatter(logging.GlogFormatter)
    logging.SetLevel(logging.DEBUG, "aiab")
}

What am I doing wrong? I've perused the various docs and I've tried some variations on the above but the same result: no error is ever reported, and the file is created successfully, but nothing is written to it, only stdout.

Thanks!

[op]

Ah. Try adding a write flag to your flags, eg. O_WRONLY!

[jefferai]

Ah shucks, I stupidly figure APPEND was making that implicit. I'll try that out and reopen if it doesn't work. Thanks!