From 6af23967a50abb13647fd72c5a8ae861b1a5ae30 Mon Sep 17 00:00:00 2001
From: turmary <turmary@126.com>
Date: Sun, 27 Sep 2020 09:14:54 +0100
Subject: [PATCH] Add: prevent install package again in
 download_install_debpkg()

---
 install.sh | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/install.sh b/install.sh
index a49f114..04747a0 100755
--- a/install.sh
+++ b/install.sh
@@ -103,9 +103,19 @@ function check_kernel_headers() {
 }
 
 function download_install_debpkg() {
-  local prefix name r
+  local prefix name r pkg status _name
   prefix=$1
   name=$2
+  pkg=${name%%_*}
+
+  status=$(dpkg -l $pkg | tail -1)
+  _name=$(  echo "$status" | awk '{ printf "%s_%s_%s", $2, $3, $4; }')
+  status=$(echo "$status" | awk '{ printf "%s", $1; }')
+
+  if [ "X$status" == "Xii" -a "X${name%.deb}" == "X$_name" ]; then
+    echo "debian package $name already installed."
+    return 0
+  fi
 
   for (( i = 0; i < 3; i++ )); do
     wget $prefix$name -O /tmp/$name && break