From 957b1298d5b7018af485fa3c57c78cc151b78aab Mon Sep 17 00:00:00 2001
From: turmary <turmary@126.com>
Date: Sun, 27 Sep 2020 08:09:25 +0100
Subject: [PATCH] Add: more convenience error message about /boot free space

---
 install.sh | 13 ++++++-------
 1 file changed, 6 insertions(+), 7 deletions(-)

diff --git a/install.sh b/install.sh
index 71685a1..32110cf 100755
--- a/install.sh
+++ b/install.sh
@@ -8,21 +8,20 @@ if [[ $EUID -ne 0 ]]; then
 fi
 
 # Check if enough space on /boot volume
-boot_line=$(df -h | grep /boot | head -n 1)
+boot_line=$(df -BM | grep /boot | head -n 1)
+MIN_BOOT_SPC=25 # MegaBytes
 if [ "x${boot_line}" = "x" ]; then
   echo "Warning: /boot volume not found .."
 else
   boot_space=$(echo $boot_line | awk '{print $4;}')
   free_space=$(echo "${boot_space%?}")
   unit="${boot_space: -1}"
-  if [[ "$unit" = "K" ]]; then
+  if [[ "$unit" != "M" ]]; then
+    echo "Warning: /boot volume not found .."
+  elif [ "$free_space" -lt "$MIN_BOOT_SPC" ]; then
     echo "Error: Not enough space left ($boot_space) on /boot"
+    echo "       at least $MIN_BOOT_SPC MB required"
     exit 1
-  elif [[ "$unit" = "M" ]]; then
-    if [ "$free_space" -lt "25" ]; then
-      echo "Error: Not enough space left ($boot_space) on /boot"
-      exit 1
-    fi
   fi
 fi