Function RunCommandNB

utils/exec.go:72–106

RunCommandNB starts a non-blocking command.

(bin string, args []string, processName string, workingDir string, logDir string, toStd bool)

// RunCommandNB starts a non-blocking command.
func RunCommandNB(bin string, args []string, processName string, workingDir string, logDir string, toStd bool) (cmd *CMD, err error) {
	cmd = new(CMD)
	err = os.Chdir(workingDir)
	if err != nil {
		log.WithField("wd", workingDir).Error("change working dir failed")
		return
	}

	cmd.LogPath = FJ(logDir, processName+".log")
	cmd.LogFD, err = os.Create(cmd.LogPath)
	if err != nil {
		log.WithField("path", cmd.LogPath).WithError(err).Error("create log file failed")
		return
	}

	cmd.Cmd = exec.Command(bin, args...)

	if toStd {
		cmd.Cmd.Stdout = io.MultiWriter(os.Stdout, cmd.LogFD)
		cmd.Cmd.Stderr = io.MultiWriter(os.Stderr, cmd.LogFD)
	} else {
		cmd.Cmd.Stdout = cmd.LogFD
		cmd.Cmd.Stderr = cmd.LogFD
	}

	err = cmd.Cmd.Start()
	if err != nil {
		log.WithError(err).Error("cmd.Start() failed")
		_ = cmd.LogFD.Close()
		cmd = nil
		return
	}

	return
}