Generate password like in wp

genpwd

#!/bin/bash

rand() {
    RANGE=$2
    rand=$RANDOM
    let "rand %= $RANGE"
}

generate_password() {
    chars='abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789'
    if $specialchars ; then
        chars+='!@#$%^&*()'
    fi
    if $extraspecialchars ; then
        chars+='-_ []{}<>~`+=,.;:/?|'
    fi
    
    password=''
    i=0
    while [  $i -lt $length ]; do
        #echo $i
        let i=i+1
        len=${#chars}
        let "len -= 1"
        rand=0
        rand 0 len
        password+=${chars:$rand:1}
    done
    echo $password
}

length=12
if [ -n "$1" ]; then
    length=$1
fi

specialchars=true
nospecialchars=false
extraspecialchars=false

args=(`echo "${@:2}" | egrep -o "\-\-(.*)( |=(.*)|$)"`)

for arg in ${args[@]}; do
    arg=`echo $arg | sed "s/^--//g"`
    
    name=$arg
    value=true

    name=`echo "$name" | sed "s/[^0-9a-zA-Z_]//g"`

    eval "$name=\$value"
done

if $nospecialchars ; then
    specialchars=false
fi

generate_password

curl -L -# -o 'genpwd' https://goo.gl/KqqHM7 && chmod +x genpwd && sudo mv genpwd /usr/local/bin/