linux - 无法在 systemd 中为/dev 创建自定义挂载点

Question

我在嵌入式系统中工作，我们正在从 upstart 迁移到 systemd。我正在尝试在 rootfs 中为/dev 编写 .mount 文件。但是这个失败了。有人可以帮忙吗？

#  This file is part of systemd.
#
#  systemd is free software; you can redistribute it and/or modify it
#  under the terms of the GNU Lesser General Public License as published by
#  the Free Software Foundation; either version 2.1 of the License, or
#  (at your option) any later version.

[Unit]
Description=/dev Directory
Documentation=man:hier(7)
Documentation=http://www.freedesktop.org/wiki/Software/systemd/APIFileSystems
DefaultDependencies=no
Conflicts=umount.target
Before=local-fs.target umount.target

[Mount]
What=tmpfs
Where=/dev
Type=tmpfs
Options=mode=1777

我的文件名是 dev.mount。

我收到以下错误无法为单元 dev.mount 添加依赖作业，忽略:单元 dev.mount 加载失败:参数无效

Answer 1

摘自文档 systemd.mount

Some file systems have special semantics as API file systems for kernel-to-userspace and userspace-to-userspace interfaces. Some of them may not be changed via mount units, and cannot be disabled.

另见: API file systems