gui-init: Add System Info menu option

Adapted from github.com/osresearch/heads/pull/760

initrd/bin/gui-init

@@ -246,6 +246,7 @@ while true; do
         'y' ' Default boot' \
         'r' ' Refresh TOTP/HOTP' \
         'a' ' Options -->' \
+        'S' ' System Info' \
         'P' ' Power Off' \
         2>/tmp/whiptail || recovery "GUI menu failed"
 
@@ -403,6 +404,15 @@ while true; do
     continue
   fi
 
+  if [ "$totp_confirm" = "S" ]; then
+    memtotal=$(cat /proc/meminfo | grep 'MemTotal' | tr -s ' ' | cut -f2 -d ' ')
+    memtotal=$((${memtotal} / 1024 / 1024 + 1))
+    cpustr=$(cat /proc/cpuinfo | grep 'model name' | uniq | sed -r 's/\(R\)//;s/\(TM\)//;s/CPU //;s/model name.*: //')
+    whiptail --title 'System Info' \
+      --msgbox "VER: ${FW_VER}\n\nCPU: ${cpustr}\nRAM: ${memtotal} MB\n\n$(fdisk -l | grep -e '/dev/sd.:' -e '/dev/nvme.*:' | sed 's/B,.*/B/')" 16 60
+    continue
+  fi
+
   if [ "$totp_confirm" = "F" ]; then
     oem-factory-reset
     continue

initrd/init

@@ -101,6 +101,9 @@ fi
 combine_configs
 . /tmp/config
 
+# export firmware version
+export FW_VER=$(dmesg | grep 'DMI' | grep -o 'BIOS.*' | cut -f2 -d ' ')
+
 # Add our boot devices into the /etc/fstab, if they are defined
 # in the configuration file.
 if [ ! -z "$CONFIG_BOOT_DEV" ]; then