Initial commit (reqd by ASLR_check.sh)

ch7/color.sh

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+#!/bin/bash
+# color.sh
+# ***************************************************************
+# * This program is part of the source code released for the book
+# *  "Linux Kernel Programming"
+# *  (c) Author: Kaiwan N Billimoria
+# *  Publisher:  Packt
+# *  GitHub repository:
+# *  https://github.com/PacktPublishing/Linux-Kernel-Programming
+# *
+# * From: Ch 6 : Kernel and Memory Management Internals Essentials
+# ****************************************************************
+# * Brief Description:
+# [K]ASLR = [Kernel] Address Space Layout Randomization
+# This script provides basic color support
+# ****************************************************************
+# Ref: https://stackoverflow.com/questions/5947742/how-to-change-the-output-color-of-echo-in-linux
+# [Ans by Drew Noakes]
+# Useful Ref! https://i.stack.imgur.com/a2S4s.png
+
+#--- Foreground Colors
+fg_black() { tput setaf 0 
+}
+fg_red() { tput setaf 1
+}
+fg_orange() { tput setaf 202
+}
+fg_green() { tput setaf 22 
+}
+fg_purple() { tput setaf 53 
+}
+fg_yellow() { tput setaf 3
+}
+fg_blue() { tput setaf 4
+}
+fg_magenta() { tput setaf 5
+}
+fg_cyan() { tput setaf 6
+}
+fg_white() { tput setaf 7
+}
+fg_grey() { tput setaf 8
+}
+ 
+#--- Background Colors
+bg_white() { tput setab 15
+}
+bg_gray() { tput setab 250
+}
+bg_red() { tput setab 1
+}
+bg_green() { tput setab 2
+}
+bg_yellow() { tput setab 3
+}
+bg_blue() { tput setab 4
+}
+bg_cyan() { tput setab 6
+}
+
+#  Reset text attributes to normal without clearing screen.
+color_reset()
+{ 
+   tput sgr0 
+} 
+
+# Try me!
+test_256()
+{
+for i in $(seq 0 255)
+do
+  tput setab $i
+  printf '%03d ' $i
+done
+color_reset
+}