Recycle bin in bash problem

I need to make a recycle bin code using bash. Here is what I have done so far. My problem is that when I move a file with the same name into the trash folder it just overwrites the previous file. Can you give me any suggestions on how to开发者_如何学Go approach this problem?

#!/bin/bash

mkdir -p "$HOME/Trash"
if [ $1 = -restore ]; then
    while read file; do
    mv $HOME/Trash/$2 /$file
    done < try.txt
else
    if [ $1 = -restoreall ]; then
        mv $HOME/Trash/* /$PWD
    else
        if [ $1 = -empty ]; then
            rm -rfv /$HOME/Trash/*
        else
            mv $PWD/"$1"/$HOME/Trash
            echo -n "$PWD" >> /$HOME/Bash/try
        fi
    fi
fi

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You could append the timestamp of the time of deletion to the filename in your Trash folder. Upon restore, you could strip this off again.

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To add a timestamp to your file, use something like this:

DT=$(date +'%Y%m%d-%H%M%S')
mv $PWD/"$1" "/$HOME/Trash/${1}.${DT}"

This will, e.g., create a file like initrd.img-2.6.28-11-generic.20110615-140159 when moving initrd.img-2.6.28-11-generic.

To get the original filename, strip everything starting from the last dot, like with:

NAME_WITHOUT_TIMESTAMP=${file%.*-*}

The pattern is on the right side after the percentage char. (.* would also be enough to match.)

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Take a look how trash-cli does it. It's written in Python and uses the same trash bin as desktop environments. Trash-cli is available at least in the big Linux distributions.

http://code.google.com/p/trash-cli/

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Probably the easiest thing to do is simply add -i to the invocation of mv. That will prompt the user whether or not to replace. If you happen to have access to gnu cp (eg, on Linux), you could use cp --backup instead of mv.