#!/bin/bash

LOG_DIR=/var/log/3proxy
ARCHIVE_DIR=/var/log/3proxy/archives
ARCHIVER=bzip2
for file in `find -L $LOG_DIR -maxdepth 1 -regextype posix-extended -type f -mmin +100 -regex "^.*log.*"`
do
    filename=`basename $file`
    mv $file $ARCHIVE_DIR && $ARCHIVER $ARCHIVE_DIR/$filename
done

used=`df $LOG_DIR | tail -1 | awk {'print $5;'} | sed s/%//`

while (( $used > 85 ))
do
    # remove the oldest archive file
    file=`ls -tr $ARCHIVE_DIR | head -1`
    # bail out if no archive files left
    if [ -z "$file" ]; then
        echo "No files in $ARCHIVE_DIR to remove"
        exit 1
    fi
    rm -f $ARCHIVE_DIR/$file
    used=`df $LOG_DIR | tail -1 | awk {'print $5;'} | sed s/%//`
done