novelloshell-bashrc

####### For NovelloShell #######
## source this file in /etc/bashrc file of the system hosting NovelloShell ##

function checkcmd
{
valid_cmds="ls ll cd ll vi cat mkdir cp mv echo "
valid_writing_cmds="vi mkdir cp mv "

if [[ $PWD != *"$VALIDDIR"* ]]
then
        echo -e "Invalid directory usage, exiting..."
        exit
fi

cmd=$(echo $BASH_COMMAND | cut -f 1 -d ' ')
arg=$(echo $BASH_COMMAND | cut -f 2- -d ' ')

if [[ "$BASH_COMMAND" != @(*"printf"*|*"PATH"*) ]]
then
        if [[ $cmd != *"bash"* ]]
        then
                if [[ "$valid_cmds" != *"$cmd "* ]]
                then
                        echo -e "Invalid command usage, exiting..."
                        exit
                fi
                if [[ "$valid_writing_cmds" == *"$cmd "* ]]
                then
                        if [[ $arg == *".."* ]]
                        then
                                echo -e "You can not access parent directory with the command writing to disk, exiting..."
                                exit
                        fi
                fi
        fi
else
echo -e ""
fi
}

if [[ "$NOVELLO" == "yes" ]]
then
        trap 'checkcmd  $VALIDDIR' debug
fi