<div dir="ltr">Hi, <div><br>I'm not sure what is your use case, but you can check usbmount[1][2] or automount-usb[3] for example on how to use udev with systemd:</div><div><br>Regards,<br>Vincent<br><br>[1]<a href="https://github.com/rbrito/usbmount">https://github.com/rbrito/usbmount</a><br>
<span style="color:rgb(34,34,34);font-family:arial,sans-serif;font-size:small;font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;font-weight:400;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;background-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:initial;float:none;display:inline">[2]<a href="https://github.com/nefethael/meta-random/blob/master/recipes-support/usbmount/usbmount_git.bb">https://github.com/nefethael/meta-random/blob/master/recipes-support/usbmount/usbmount_git.bb</a></span>
<br>[3]<a href="https://github.com/six-k/">https://github.com/six-k/</a><span style="color:rgb(34,34,34);font-family:arial,sans-serif;font-size:small;font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;font-weight:400;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;background-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:initial;float:none;display:inline">automount-usb</span>
<br><br></div></div><div class="gmail_extra"><br><div class="gmail_quote">2018-03-02 6:44 GMT+01:00 Hongzhi, Song <span dir="ltr"><<a href="mailto:hongzhi.song@windriver.com" target="_blank">hongzhi.song@windriver.com</a>></span>:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div text="#000000" bgcolor="#FFFFFF">
<p>Hi all,</p>
<p>Does anyone have suggestion for me?</p>
<p>Thanks.</p><span class="HOEnZb"><font color="#888888">
<p>Hongzhi.Song<br>
</p></font></span><div><div class="h5">
<br>
<div class="m_3529184748491425439moz-cite-prefix">On 2018年03月01日 18:35, Hongzhi, Song
wrote:<br>
</div>
<blockquote type="cite">
<p>Defect:</p>
<p> The exiting method of automount of udev in <font face="Times New Roman, Times, serif"><i>oe-core/meta/ </i></font>is
using <br>
</p>
<p><font face="Times New Roman, Times, serif"><i>automount.rules</i></font>
which call <font face="Times New Roman, Times, serif"><i>mount.sh</i></font>
that using <i><font face="Times New Roman, Times, serif">/bin/mount</font></i>
to mount device. <br>
</p>
<p>But systemd-udevd detaches <font face="Times New Roman, Times,
serif"><i>mount()</i></font> operations done within the
service <br>
</p>
<p>from the rest of the system with MountFlag=slave， this means
host can <br>
</p>
<p>not access device. (e.g. Executing <font face="Times New
Roman, Times, serif"><i>mkfs.ext4 /dev/sda1/</i></font>
prompts <br>
</p>
<p><i><font face="Times New Roman, Times, serif">/dev/sda1 is
apparently in use by the system; will not make a filesystem
here!</font></i>)<br>
</p>
<p><br>
</p>
<p>Solution:</p>
<p> Systemd upstream suggest that the best way is to use
"systemd-mount" <br>
</p>
<p>in udev rules, which will request the mount operation to be
executed by PID 1.<br>
</p>
<p>And I have tested it was effective.</p>
<p><br>
</p>
<p>Uncertain：</p>
<p> The exiting method is designed for <font face="Times New
Roman, Times, serif"><i>SysV-init </i></font>which is not
compatible to <br>
</p>
<p>systemd-udev, at least that's what I think. So I think that we
should design</p>
<p>a new rule or organizational structure to be suitable for
systemd-udev and <br>
</p>
<p>to mount deferent device. Dose anyone help do this? Or I can
make some <br>
</p>
<p>improvements on the basis of the existing with "systemd-mount".<br>
</p>
<br>
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<br>
</blockquote>
<br>
</div></div></div>
<br>--<br>
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<br></blockquote></div><br></div>