Shell Programming and Scripting

#!/usr/bin/env bash

# @(#) s1	Demonstrate terminal color codes on disk.

# Utility functions: print-as-echo, print-line-with-visual-space.
pe() { for i;do printf "%s" "$i";done; printf "\n"; }
pl() { pe;pe "-----" ;pe "$*"; }

# Write codes and text to scratch file t1.
{
printf "\033[32m"
printf "%-20s\n" "Orange colour"
printf "\033[mo"
} > t1

pl " Results of dump of file t1, showing codes exist:"
od -bc t1

exit 0

% ./s1

-----
 Results of dump of file t1, showing codes exist:
0000000 033 133 063 062 155 117 162 141 156 147 145 040 143 157 154 157
        033   [   3   2   m   O   r   a   n   g   e       c   o   l   o
0000020 165 162 040 040 040 040 040 040 040 012 033 133 155 157
          u   r                              \n 033   [   m   o
0000036

Environment: LC_ALL = C, LANG = C
(Versions displayed with local utility "version")
OS, ker|rel, machine: Linux, 2.6.26-2-amd64, x86_64
Distribution        : Debian GNU/Linux 5.0 
GNU bash 3.2.39
printf - is a shell builtin [bash]