Fix detection of BootDrive in my Docker container

[mhaas]

Hi,

I am now running Storage.sh inside a Ubuntu Docker container on Home Assistant Operating System. It seems that Docker is introducing some extra output in the findmnt command used to detect the device:

root@a1910f57cf49:/# findmnt -n -o SOURCE --target /mnt/
/dev/sda8[/benchmark]

The following patch makes this work for me:

root@a1910f57cf49:/# diff -u Storage.sh.1 Storage.sh   
--- Storage.sh.1	2022-08-14 05:49:27.207017311 +0000
+++ Storage.sh	2022-08-14 05:50:27.025675373 +0000
@@ -339,7 +339,7 @@
     BootDrive=$(df -H | grep -m 1 boot | awk 'NR==1{ print $1 }' | sed 's/\[\/\@\]//g')
   fi
 else
-  BootDrive=$(findmnt -n -o SOURCE --target "$ChosenPartition" | sed 's/\[\/\@\]//g')
+  BootDrive=$(findmnt -n -o SOURCE --target "$ChosenPartition" | sed -e 's/\[\/.*\]//g')
 fi
 
 # Detect BootDrive suffix

This patch might be required also for other instances of that sed call.

For reference, this is how I start the container:

docker run --privileged -ti -v /mnt/data/benchmark/:/mnt/ -v /dev/:/dev/  ubuntu:jammy

And this is how mount looks like inside the container:

/dev/sda8 on /etc/resolv.conf type ext4 (rw,relatime)
/dev/sda8 on /etc/hostname type ext4 (rw,relatime)
/dev/sda8 on /etc/hosts type ext4 (rw,relatime)

root@a1910f57cf49:/# findmnt --version
findmnt from util-linux 2.37.2
root@a1910f57cf49:/# uname -a
Linux a1910f57cf49 5.15.32-v8 #1 SMP PREEMPT Sat Jul 23 18:06:19 UTC 2022 aarch64 aarch64 aarch64 GNU/Linux

[TheRemote]

Got it. Doesn't seem to be causing any problems from my testing. It should be in here now!