#!/bin/bash
#
# A password generator. 
#
# Thu Nov 20 08:23:44 CET 2008 hanr
# Fri Feb 26 15:32:41 CET 2010 hanr - extended with special char at the end
#

SIZE=7          # Length of password without special char

CHARARR=( q w e r t z u i o p a s d f g h j k l y x c v b n m Q W E R T Z U I O P A S D F G H J K L Y X C V B N M 1 2 3 4 5 6 7 8 9 0
)               # Array filling with chars

SPCHARARR=( ! . = + - 
)               # Array filling with special chars

TOTELEMCHAR=${#CHARARR[*]}           # Number of elements in char array
TOTELEMSPCHAR=${#SPCHARARR[*]}       # Number of elements in special char array
COUNTER=0                            # Counter for loop
while [ $COUNTER -lt $SIZE ]
do
        COUNTER=`expr $COUNTER + 1`             # Increment
        CHARINDEX=$(($RANDOM%$TOTELEMCHAR))             # Random indexnumber inside the array length with modulo
        PASS=$PASS"${CHARARR[$CHARINDEX]}"              # Attach the char in the element to the password until its length
done
if [ ! `echo $PASS |egrep [0-9] >/dev/null` ]; then     # If the passwd hasn't at least one numeric digit,
        PASS=`echo $PASS |cut -b1-6`                    # delete the last element
        PASS=$PASS"$(($RANDOM%9))"                      # and attach a random number from 0-9 at the end
fi

SPCHARINDEX=$(($RANDOM%$TOTELEMSPCHAR)) # Random indexnumber inside the array length with modulo
PASS=$PASS"${SPCHARARR[$SPCHARINDEX]}"  # Attach the special char in the element to the password

echo $PASS                              # print the password
exit 0