cs_function

#!/bin/bash

# This script defines a function, named 'cs',
# which wraps the original bulti in 'cd' function,
# adding the functionality of storing the current
# PWD location and persist this location across
# another instances of the BASH shell.

# To be effective it needs to be called at each
# bash starting, on possible way to do this is
# to call it in your .bashrc file:

# source ~/scripts/cs_function

# File to store the current PWD location 
CS_TMP="$HOME/.tmp_current_dir"

# A 'cd' function wrapper
function cs()
{
    # check if the 'cs' function has some arguments
    if [ $# -eq 0 ]
    then
        cd
    else
        cd "$*"
    fi

    # Saving the PWD location
    echo $PWD > $CS_TMP
}

# Loading the previously stored PWD location and
# defining it as the current one
if [ -f "$CS_TMP" ]
then
    cd "`cat $CS_TMP`"
fi

# Replacing the original 'cd' function by its 'cs'
# wrapper:
alias cd="cs"