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#!/bin/bash
# homework.sh: All-purpose homework assignment solution.
# Author: M. Leo Cooper
# If you substitute your own name as author, then it is plagiarism,
#+ possibly a lesser sin than cheating on your homework!
# License: Public Domain
# This script may be turned in to your instructor
#+ in fulfillment of ALL shell scripting homework assignments.
# It's sparsely commented, but you, the student, can easily remedy that.
# The script author repudiates all responsibility!
DLA=1
P1=2
P2=4
P3=7
PP1=0
PP2=8
MAXL=9
E_LZY=99
declare -a L
L[0]="3 4 0 17 29 8 13 18 19 17 20 2 19 14 17 28"
L[1]="8 29 12 14 18 19 29 4 12 15 7 0 19 8 2 0 11 11 24 29 17 4 6 17 4 19"
L[2]="29 19 7 0 19 29 8 29 7 0 21 4 29 13 4 6 11 4 2 19 4 3"
L[3]="19 14 29 2 14 12 15 11 4 19 4 29 19 7 8 18 29"
L[4]="18 2 7 14 14 11 22 14 17 10 29 0 18 18 8 6 13 12 4 13 19 26"
L[5]="15 11 4 0 18 4 29 0 2 2 4 15 19 29 12 24 29 7 20 12 1 11 4 29"
L[6]="4 23 2 20 18 4 29 14 5 29 4 6 17 4 6 8 14 20 18 29"
L[7]="11 0 25 8 13 4 18 18 27"
L[8]="0 13 3 29 6 17 0 3 4 29 12 4 29 0 2 2 14 17 3 8 13 6 11 24 26"
L[9]="19 7 0 13 10 29 24 14 20 26"
declare -a \
alph=( A B C D E F G H I J K L M N O P Q R S T U V W X Y Z . , : ' ' )
pt_lt ()
{
echo -n "${alph[$1]}"
echo -n -e "\a"
sleep $DLA
}
b_r ()
{
echo -e '\E[31;48m\033[1m'
}
cr ()
{
echo -e "\a"
sleep $DLA
}
restore ()
{
echo -e '\033[0m' # Bold off.
tput sgr0 # Normal.
}
p_l ()
{
for ltr in $1
do
pt_lt "$ltr"
done
}
# ----------------------
b_r
for i in $(seq 0 $MAXL)
do
p_l "${L[i]}"
if [[ "$i" -eq "$P1" || "$i" -eq "$P2" || "$i" -eq "$P3" ]]
then
cr
elif [[ "$i" -eq "$PP1" || "$i" -eq "$PP2" ]]
then
cr; cr
fi
done
restore
# ----------------------
echo
exit $E_LZY
# A typical example of an obfuscated script that is difficult
#+ to understand, and frustrating to maintain.
# In your career as a sysadmin, you'll run into these critters
#+ all too often.
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