From ea6f4afcfc31c77c338c3f0f9ce994c8da73e755 Mon Sep 17 00:00:00 2001
From: GONG Jie <gongjie@linux.vnet.ibm.com>
Date: Fri, 28 Dec 2018 15:32:30 +0800
Subject: [PATCH] Add shell script function base64decode()

---
 .../share/xcat/install/scripts/pre.rh.rhels7  | 56 +++++++++++++++++++
 1 file changed, 56 insertions(+)

diff --git a/xCAT-server/share/xcat/install/scripts/pre.rh.rhels7 b/xCAT-server/share/xcat/install/scripts/pre.rh.rhels7
index 09769e5e4..3f9aca9b6 100755
--- a/xCAT-server/share/xcat/install/scripts/pre.rh.rhels7
+++ b/xCAT-server/share/xcat/install/scripts/pre.rh.rhels7
@@ -144,7 +144,63 @@ fi
 
 /tmp/foo.py >/foo.log 2>&1 &
 
+base64decode()
+{
+    h0="0";  h1="1";  h2="2";  h3="3";  h4="4";  h5="5";  h6="6";  h7="7";
+    h8="8";  h9="9"; h10="A"; h11="B"; h12="C"; h13="D"; h14="E"; h15="F";
 
+    while :
+    do
+        i=0
+        while [ "$i" -lt 4 ]
+        do
+            read -n 1 c || return
+
+            case "${c}" in
+            "A") d=0  ;; "B") d=1  ;; "C") d=2  ;; "D") d=3  ;;
+            "E") d=4  ;; "F") d=5  ;; "G") d=6  ;; "H") d=7  ;;
+            "I") d=8  ;; "J") d=9  ;; "K") d=10 ;; "L") d=11 ;;
+            "M") d=12 ;; "N") d=13 ;; "O") d=14 ;; "P") d=15 ;;
+            "Q") d=16 ;; "R") d=17 ;; "S") d=18 ;; "T") d=19 ;;
+            "U") d=20 ;; "V") d=21 ;; "W") d=22 ;; "X") d=23 ;;
+            "Y") d=24 ;; "Z") d=25 ;; "a") d=26 ;; "b") d=27 ;;
+            "c") d=28 ;; "d") d=29 ;; "e") d=30 ;; "f") d=31 ;;
+            "g") d=32 ;; "h") d=33 ;; "i") d=34 ;; "j") d=35 ;;
+            "k") d=36 ;; "l") d=37 ;; "m") d=38 ;; "n") d=39 ;;
+            "o") d=40 ;; "p") d=41 ;; "q") d=42 ;; "r") d=43 ;;
+            "s") d=44 ;; "t") d=45 ;; "u") d=46 ;; "v") d=47 ;;
+            "w") d=48 ;; "x") d=49 ;; "y") d=50 ;; "z") d=51 ;;
+            "0") d=52 ;; "1") d=53 ;; "2") d=54 ;; "3") d=55 ;;
+            "4") d=56 ;; "5") d=57 ;; "6") d=58 ;; "7") d=59 ;;
+            "8") d=60 ;; "9") d=61 ;; "+") d=62 ;; "/") d=63 ;;
+            "=") d=0  ;;
+            *) continue ;;
+            esac
+
+            eval "a${i}=${c}"
+            eval "b${i}=${d}"
+
+            i=$(( i + 1 ))
+        done
+
+        o0=$(( ((b0 << 2) | (b1 >> 4)) & 0xff ))
+        o1=$(( ((b1 << 4) | (b2 >> 2)) & 0xff ))
+        o2=$(( ((b2 << 6) | b3) & 0xff ))
+
+        [ "${a2}" == "=" ] &&
+            eval "printf \"\\x\${h$(( o0 / 16 ))}\${h$(( o0 % 16
+                ))}\"" &&
+            return
+        [ "${a3}" == "=" ] &&
+            eval "printf \"\\x\${h$(( o0 / 16 ))}\${h$(( o0 % 16
+                ))}\\x\${h$(( o1 / 16 ))}\${h$(( o1 % 16
+                ))}\"" &&
+            return
+        eval "printf \"\\x\${h$(( o0 / 16 ))}\${h$(( o0 % 16
+            ))}\\x\${h$(( o1 / 16 ))}\${h$(( o1 % 16
+            ))}\\x\${h$(( o2 / 16 ))}\${h$(( o2 % 16 ))}\""
+    done
+}
 
 #time to ascertain fstype and PReP/UEFI/legacy
 #also, find first available block device (sda or vda likely)