}
	return fmt.Errorf("%s exists but is not a plain file, cannot continue", projectsFile)
}

func lockFile(file *os.File) error {
	return unix.Flock(int(file.Fd()), unix.LOCK_EX)
}

func unlockFile(file *os.File) error {
	return unix.Flock(int(file.Fd()), unix.LOCK_UN)
}

// openAndLockProjectFiles opens /etc/projects and /etc/projid locked.
// Creates them if they don't exist