config-gui: filter out invalid boot device options

use similar filtering logic as with USB drives to provide
the user a more sane list of boot device options. Show user
only valid bootable partitions, not block devices.

There's no point in showing /dev/nvme0 and /dev/nvme0n1 (eg)
when /dev/nvme0n1p[1..n] (eg) exist, as the former are not
valid boot devices.

Signed-off-by: Matt DeVillier <matt.devillier@puri.sm>

initrd/bin/config-gui.sh

@@ -76,8 +76,21 @@ while true; do
     ;;
     "b" )
       CURRENT_OPTION=`grep 'CONFIG_BOOT_DEV=' /tmp/config | tail -n1 | cut -f2 -d '=' | tr -d '"'`
-      find /dev -name 'sd*' -o -name 'nvme*' > /tmp/filelist.txt
+      fdisk -l | grep "Disk" | cut -f2 -d " " | cut -f1 -d ":" > /tmp/disklist.txt
-      file_selector "/tmp/filelist.txt" "Choose the default /boot device.\n\nCurrently set to $CURRENT_OPTION."
+      # filter out extraneous options
+      > /tmp/boot_device_list.txt
+      for i in `cat /tmp/disklist.txt`; do
+        # remove block device from list if numeric partitions exist, since not bootable
+        let DEV_NUM_PARTITIONS=`ls -1 $i* | wc -l`-1
+        if [ ${DEV_NUM_PARTITIONS} -eq 0 ]; then
+          echo $i >> /tmp/boot_device_list.txt
+        else
+          ls $i* | tail -${DEV_NUM_PARTITIONS} >> /tmp/boot_device_list.txt
+        fi
+      done
+      file_selector "/tmp/boot_device_list.txt" \
+          "Choose the default /boot device.\n\nCurrently set to $CURRENT_OPTION." \
+          "Boot Device Selection"
       if [ "$FILE" == "" ]; then
         return
       else