shell 多进程打包备份脚本

#!/bin/sh
##############################################
#                                                                                                                    #
#                                                                                                                    #
#     tar the all backup data and saved                                                  #
#       in backuptar directory                                                                      #
#                                                                                                                    #
##############################################

DATE=`date +%Y%m%d`
DATE_START=`date +%Y%m%d-%H:%M:%S`
Mail="test@example.com"
LogName=`echo $0 | cut -d. -f1`
pid_file="/tmp/$LogName.pid"
BACKUP_DIR="file1 file2 file3"

tmp_fifofile="/tmp/$$.fifo"

function pid_check(){
###check the rsync scrpits have finished
count=0
for i in 1 2 3
do
if [ -f "/tmp/rsync_backup.pid" ];then
sleep 60
((count++))
fi
done
if [ $count -eq 3 ];then
echo -e "Rsync the backup files maybe have problesm,the cn_backup.pid exits." | mail -s "Tarball failure,can not continue `hostnae -i`" $Mail
exit 43
fi
}

function pid_lock(){
if [ -f "$pid_file" ];then
backup_tar_pid=`cat $pid_file`
echo -e "Tarball failure for Backup Server: \n
PID:     $backup_tar_pid
DATE:    $DATE
Script:  $0 " | mail -s "Tarball failure for Backup Server `hostname -i`" $Mail
echo "Tarball failure" >> /home/opsuser/backup_log/${LogName}_$DATE.log
exit 44
else
echo $$ > $pid_file
fi
}

function pid_free(){
rm $pid_file
if [ -f "$pid_file" ];then
echo "$pid_file exist, please check the pid file" >> /home/opsuser/backup_log/${LogName}_$DATE.log
fi
}

function Tarball(){
mkfifo $tmp_fifofile
exec 6<>$tmp_fifofile
rm $tmp_fifofile
Num=`echo $BACKUP_DIR | tr ' ' '\n' | wc -l`

thread=8
for ((i=0;i < $thread;i++))
do
echo
done >& 6

for i in $BACKUP_DIR
do
read -u6
{
sleep 3
Name=`echo ${i##*/}`
cd $i
if [ $i = "/data/config_bak/httpd_201" ]
then
tar zcf ${Name}_${DATE}.tgz backup --exclude downloads
else
tar zcf ${Name}_${DATE}.tgz backup
fi
#ls -l ${Name}_${DATE}.tgz              #It is using for test

echo >& 6
} &
done

wait

exec 6>&-

DATE_END=`date +%Y%m%d-%H:%M:%S`

echo "Make tarball SUCCEED on $DATE" >> /home/opsuser/backup_log/${LogName}_$DATE.log
echo -e "Tarball succeed for Backup Server: \n
PID:   $$
DATE:  $DATE \n
START: $DATE_START
END:   $DATE_END \n" > /tmp/backuptar.mail

}

function SendMail(){
cat /tmp/backuptar.mail | mail -s "Tarball SUCCEED for Backup Server Data `hostname -i`" $Mail
rm /tmp/backuptar.mail
}

pid_check
pid_lock
Tarball
SendMail
pid_free