#!/bin/sh

# script for remove old backup files v0.09.3 pfzim (c) 2010 (44f5709e242b975305161941b30d1573)

# save last ${storage_time} days old backups, all 1 and 15 day of month

# backups other will be deleted

storage_path=''

storage_time=0

no_permanent=no

expired_cmd='rm -f'

awkcmd='awk'

while [ $# -gt 0 ]; do

key="$1"

case $key in

-p|--path)

storage_path="$2"

shift

shift

;;

-d|--days)

storage_time="$2"

shift

shift

;;

-n|--no-permanent)

no_permanent=yes

shift

;;

-h|--help)

storage_time=0

break

;;

*)

echo "Unknown argument: $1"

exit 1

;;

esac

done

echo 'Script for remove old backup files v0.09.3 pfzim (c) 2010'

if [ -z "${storage_path}" -o -z "${storage_time}" -o "${storage_time}" -le 0 ] ; then

echo 'Usage: rotate.sh -p /var/backups -d 14'

echo 'Options:'

echo ' -p|--path - path to stored backups'

echo ' -d|--days - how long store backups'

echo ' -n|--no-permanent - do not skip files for 1 and 15 days'

echo ' -h|--help - this help'

exit 1

fi

curdate=`date '+%Y-%m-%d-%H-%M-%S'`

#curdate=`mysql -h 127.0.0.1 -u LOGIN -pPASSWORD -s --skip-column-names -e "SELECT DATE_FORMAT(NOW(), '%Y-%m-%d-%H-%i-%S');"`

year=`echo $curdate | ${awkcmd} -F- '{ print $1+0; }'`

month=`echo $curdate | ${awkcmd} -F- '{ print $2+0; }'`

day=`echo $curdate | ${awkcmd} -F- '{ print $3+0; }'`

hour=`echo $curdate | ${awkcmd} -F- '{ print $4+0; }'`

minute=`echo $curdate | ${awkcmd} -F- '{ print $5+0; }'`

second=`echo $curdate | ${awkcmd} -F- '{ print $6+0; }'`

echo "Today is ${day}.${month}.${year}"

echo "Path: ${storage_path}"

echo "Days: ${storage_time}"

echo "No permanent: ${no_permanent}"

#[ "backup" "<" "backup-2010-04-14-test.tar.gz" ] || ( echo TEST1 ERROR; exit )

#[ "backup" "<" "db_dump.sql.gz" ] && ( echo TEST2 ERROR; exit )

#for filename in `find $storage_path -type f -name 'backup-*' -print`; do

for filename in ${storage_path}/backup-* ; do

#filename=`basename $filename`

filename=`echo $filename | ${awkcmd} -F/ '{ print $NF; }'`

echo -n "$filename"

if [ ! -f "${storage_path}/${filename}" ] ; then

echo " : something gone wrong. file not exist"

continue

fi

# if [ ! "backup" "<" "$filename" ] ; then

# echo " invalid file name"

# continue

# fi

y=`echo $filename | ${awkcmd} -F- '{ print $2+0; }'`

m=`echo $filename | ${awkcmd} -F- '{ print $3+0; }'`

d=`echo $filename | ${awkcmd} -F- '{ print $4+0; }'`

if [ \( "$d" -lt 1 \) -o \( "$d" -gt 31 \) -o \( "$y" -lt 1 \) ] ; then

echo " : invalid date in file name"

continue

fi

if [ \( "$no_permanent" != "yes" \) -a \( \( "$d" -eq 1 \) -o \( "$d" -eq 15 \) \) ] ; then

echo " : never deleted"

continue

fi

d=$(($d+$storage_time))

check_again=1

while [ $check_again -ne 0 ]; do

check_again=0

case $(($m)) in

1|3|5|7|8|10|12) dpm=31 ;;

4|6|9|11) dpm=30 ;;

2) if [ \( $(($y % 4)) -eq 0 \) -a \( \( $(($y % 100)) -ne 0 \) -o \( $(($y % 400)) -eq 0 \) \) ]; then

dpm=29

else

dpm=28

fi

;;

*) echo " : invalid month value: $m"; continue 2 ;;

esac

if [ $d -gt $dpm ]; then

m=$(($m+1))

d=$(($d-$dpm))

if [ $m -gt 12 ]; then

y=$(($y+1))

m=1

fi

check_again=1

fi

done

outdated=0

if [ $year -gt $y ]; then

outdated=1

elif [ $year -lt $y ]; then

outdated=-1

elif [ $month -gt $m ]; then

outdated=1

elif [ $month -lt $m ]; then

outdated=-1

elif [ $day -gt $d ]; then

outdated=1

elif [ $day -lt $d ]; then

outdated=-1

fi

if [ $outdated -gt 0 ]; then

echo " : deleted. expired at ${d}.${m}.${y}"

${expired_cmd} "${storage_path}/${filename}"

else

echo " : saved until ${d}.${m}.${y}"

fi

done