auto mount and unmount using udev rules

[Danishka Navin <danishka@xxxxxxxxx>]

Hi,

I am trying to mount a USB drive to given symlink and mount it to a given mount point.

Mount is working but when the device removed, I can still see the mount

cat /etc/udev/rules.d/81-hnt-usb-rule.rules
ACTION="" KERNEL=="sd?1", SUBSYSTEM=="block", ENV{ID_BUS}=="usb", \
   SYMLINK+="hanthana%n", ENV{SYSTEMD_WANTS}="hnt-usb-rule.service"

ACTION="" RUN+="/usr/bin/umount $(/usr/bin/mount | grep backup | /usr/bin/awk '{print $1}')"

------------------------------------------------------------------------------------------------
[danishka@hanthana ~]$ cat /etc/systemd/system/hnt-usb-rule.service
[Unit]
Description=USB Mount


[Service]
Type=oneshot
ExecStart=/root/hnt.sh

[Install]
WantedBy=default.target
----------------------------------------------------------------------------------------------------------
cat /root/hnt.sh
#!/bin/bash
mkdir /backup
lsblk > /var/log/hnt.log
/usr/bin/mount /dev/hanthana1 /backup

------------------------------------------------------------------------------------------------

ACTION="" RUN+="/usr/bin/umount $(/usr/bin/mount | grep backup | /usr/bin/awk '{print $1}')"


[root@hanthana ~]# echo $(/usr/bin/mount | grep backup | /usr/bin/awk '{print $1}')
/dev/sda1

Even though you can't access /backup after removing the USB, mount command shows following results (After plugin the usb and remove several times). I wonder why it automatically remove these entries as fedora normally mount USBs on default location.

/dev/sda1 on /backup type ext4 (rw, relatime, seclabel)

/dev/sdb1 on /backup type ext4 (rw, relatime, seclabel)

/dev/sdc1 on /backup type ext4 (rw, relatime, seclabel)

/dev/sdd1 on /backup type ext4 (rw, relatime, seclabel)

I was testing on both Fedora 28 Gnome and LXDE.

Regards,

--

Danishka Navin

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