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Iskustvo's questions

Martin Hope
Iskustvo
Asked: 2018-08-27 12:20:52 +0800 CST
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有一段时间，我有一个有效的 udev 规则来自动挂载媒体设备。

/etc/udev/rules.d/61-mount_media_by_label.rules

#
# To propagate udev's mountpoint to the user space, MountFlags must have a value "shared" in the /usr/lib/systemd/system/systemd-udevd.service.
#

# Ignore devices that aren't storage block-devices and block-devices that are already listed in /etc/fstab.
KERNEL!="sd[a-z][1-9]*", GOTO="mount_media_by_label_end"
PROGRAM="/bin/grep -e '^UUID=%E{ID_FS_UUID}' /etc/fstab", RESULT!="", GOTO="mount_media_by_label_end"

# Decide the name for device's mountpoint directory, based on device's label.
ENV{ID_FS_LABEL}!="", ENV{mountpoint}="%E{ID_FS_LABEL}"
ENV{ID_FS_LABEL}=="", ENV{mountpoint}="usb-%k"

# If device is being plugged in, set options for mount command.
ACTION=="add", ENV{mount_options}="relatime"
ACTION=="add", ENV{ID_FS_TYPE}=="vfat|ntfs", ENV{mount_options}="%E{mount_options},utf8,gid=100,umask=002"

# If device is being plugged in, create mountpoint directory in /media and mount device node to it.
ACTION=="add", RUN+="/bin/mkdir -p /media/%E{mountpoint}", RUN+="/bin/mount -o %E{mount_options} /dev/%k /media/%E{mountpoint}"

# If device is being plugged out, unmount it and delete its mountpoint directory.
ACTION=="remove", ENV{mountpoint}!="", RUN+="/bin/umount -l /media/%E{mountpoint}", RUN+="/bin/rmdir /media/%E{mountpoint}"

# Label for early exit.
LABEL="mount_media_by_label_end"

为了使这个规则起作用，我只需将MountFlags选项的值更改shared为
/usr/lib/systemd/system/systemd-udevd.service
在我更新systemd到 version后239，这个文件看起来就不同了。
我注意到 2 个可能有问题的更改：

  1. MountFlags默认设置中未指定该选项。
  2. 有一个新选项PrivateMounts设置为yes。

从systemd的文档中我发现现在我只需要设置PrivateMounts=no和传播挂载点就可以到达用户空间。

然而，这种情况并非如此。
我努力了

  1. 改变PrivateMounts=no
  2. 更改PrivateMounts=no和添加MountFlags=shared

但两者都不起作用。

systemd v239从 udev 规则及以后安装媒体设备的正确方法是什么？

mount systemd