tahoe-prune.sh

#tahoe-prune.sh
#Run tahoe-prune.sh when in a tahoe node dir to delete ONE share of files having "n" shares stored in this node
#Script performs some safety checks to ensure it is in a tahoe node dir before doing any rm
#usage:
#   tahoe-prune.sh num-of-shares [node-dir-path]
#
#A. Montero

if [ -e $2]; then
    dir=`pwd`
    echo "No node dir specified. Defaulting to $dir"
else
    dir=$2
fi

dir="${dir}/storage/shares"

file="my_nodeid"
echo "Checking if a tahoe node directory..."
if [ -f "$file" ]; then
    echo "File $file found."
else
    echo "File $file NOT found."
    echo "ABORTING"
    exit
fi

echo "Directory checking..."
if [ -d "$dir" ]; then
    echo "Share directory $dir found."
else
    echo "Share directory $dir NOT found."
    echo "ABORTING"
    exit
fi

if [ -e $1 ]; then
    echo "Share count filter not specified. Exiting."
    exit
else
    shares=$1
fi

echo "Pruning files with '$shares' shares... "

echo "Counting..."
pushd "$dir" > /dev/null
find . -type f | uniq -w 32 -c | grep " $shares " | tr -s "  " " " | cut -d " " -f 3 | wc -l
read -e -p "Display file listing? (y/n) " -i "n" DISPLAY
if [ "$DISPLAY" = "y" ]; then
    find . -type f | uniq -w 32 -c | grep " $shares " | tr -s "  " " " | cut -d " " -f 3 | less
fi
popd > /dev/null

read -e -p "Remove first share in each dir? (y/n) " -i "n" PURGE
if [ "$PURGE" = "y" ]; then
    pushd "$dir" > /dev/null
    rm --preserve-root -v `find . -type f | uniq -w 32 -c | grep " $shares " | tr -s "  " " " | cut -d " " -f 3`
    popd > /dev/null
fi