make shellcheck happy and randomise mac address

bootstrap

@@ -26,12 +26,16 @@ get_value() {
         secure="s"
     fi
 
+    # shellcheck source=/dev/null
     . "$CONFIG"
+
     if [ -z "${!var_name}" ]; then
         local def_val="${default_values[$var_name]}"
         read -${secure}rp "$white$prompt [$def_val]:$nocolour " value
         
         echo "export $var_name=\"${value:-$def_val}\"" >> "$CONFIG"
+        
+        # shellcheck source=/dev/null
         . "$CONFIG"
     fi
 
@@ -147,7 +151,9 @@ set_fstab() {
     local install_dev
     install_dev="$(get_value "install_dev" "installation device")"
 
-    local boot_uuid="$(blkid | grep ${install_dev}p1 | awk '{print $2}')"
+    local boot_uuid
+    boot_uuid="$(blkid | grep "${install_dev}p1" | awk '{print $2}')"
+
     cat >/mnt/etc/fstab <<EOF
 tmpfs          /tmp  tmpfs defaults,nosuid,nodev 0    0
 $boot_uuid     /boot vfat  defaults              0    0    
@@ -164,7 +170,13 @@ set_boot_scr() {
     local boot_scr="/mnt/boot/boot.scr"
     local boot_txt_mine="/mnt/boot/boot.txt.mine"
 
-    local root_uuid="$(blkid | grep ${install_dev}p2 | awk '{print $2}' | sed 's/"//g')"
+    local mac
+    mac="$(echo -n "06"; dd bs=1 count=5 if=/dev/random 2>/dev/null | hexdump -v -e '/1 " %02X"' |  tr '[:upper:]' '[:lower:]')"
+
+    local root_uuid
+    root_uuid="$(blkid | grep "${install_dev}p2" | awk '{print $2}' | sed 's/"//g')"
+
+    sed -i "s/setenv macaddr.*/setenv macadr $mac/g" "$boot_txt"
 
     sed -i "s|root=PARTUUID=|root=/dev/void/root rd.auto=1 cryptdevice=${root_uuid}:lvm|g" "$boot_txt"
     cp "$boot_txt" "$boot_txt_mine"
@@ -350,7 +362,7 @@ cmd_loop() {
     while [[ "$cmd" != "exit" ]]; do
         read -rp "${white}>$nocolour " cmd
 
-        if [[ " ${commands[@]} " =~ " ${cmd} " ]]; then
+        if [[ "${commands[*]}" == *"${cmd}"* ]]; then
            $cmd 
         else
             if [ "$cmd" != "exit" ]; then