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#!/bin/bash
#
# Copyright (c) 2002, 2003, 2004, 2005 Peter Palfrader <peter@palfrader.org>
#
# All rights reserved.
#
umask 037
set -e
set -u
DATE=`date "+%Y%m%d-%H%M%S"`
if [ -d /var/backups/local/mysql ]; then
TARGET=/var/backups/local/mysql
elif [ -d /var/local/backup/mysql ]; then
TARGET=/var/local/backup/mysql
else
echo "Cannot find a backup target directory" >&2
exit 1
fi
HOSTS="$@"
if [ -z "$HOSTS" ]; then
HOSTS="localhost"
fi
for host in $HOSTS; do
if [ "$host" = "localhost" ]; then
prefix="";
postfix="";
else
shorthost=`echo "$host" | sed -e 's/\..*//'`
prefix="$shorthost--";
postfix="--$shorthost";
fi
mysqlcnf="$HOME/.my.cnf$postfix"
if ! [ -e "$mysqlcnf" ]; then
echo "Cannot find my.cnf for host $host: $mysqlcnf" >&2
exit 1
fi
DBs=$(
echo 'SHOW DATABASES;' | mysql --defaults-file="$mysqlcnf" --host="$host" | tail -n +2 |
while read db; do
if [ "$db" = "innodb" -o "$db" = "test" ] ; then
continue;
fi
echo $db;
done
);
for db in $DBs; do
file="$TARGET/$DATE-$prefix$db"
mysqldump --defaults-file="$mysqlcnf" --host="$host" --opt --lock-tables -- "$db" > "$file"
done
for db in $DBs; do
file="$TARGET/$DATE-$prefix$db"
echo $file
done | xargs --no-run-if-empty --max-procs 4 -n 1 bzip2
for db in $DBs; do
file="$TARGET/$DATE-$prefix$db"
md5=`md5sum -- "$file.bz2" | awk '{print $1}'`
if [ -e "$TARGET/MD5-$md5" ]; then
rm -- "$file.bz2"
ln "$TARGET/MD5-$md5" "$file.bz2"
else
ln "$file.bz2" "$TARGET/MD5-$md5"
fi
done
done
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