DirkGently999

function mycd()
{
    #if this directory is writable then write to directory-based history file
    #otherwise write history in the usual home-based history file                    
    tmpDir=$PWD
    echo "#"`date '+%s'` >> $HISTFILE
    echo $USER' has exited '$PWD' for '$@ >> $HISTFILE
    builtin cd "$@" # do actual cd
    if [ -w $PWD ]; then export HISTFILE="$PWD/.dir_bash_history"; touch $HISTFILE; chmod --silent 777 $HISTFILE;
    else export HISTFILE="$HOME/.bash_history";