tar-backup

#!/bin/bash

# back up specified files and directories in a specified directory
# syntax: tar-backup <name> <src_dir> <src_files>
# - <name>: name for the tar file
# - <src_dir>: source directory
# - <src_files>: list of files and directories to back up

# some tools
. ./common-backup

# name
NAME=$1; shift
# target
TARGET=$1; shift

BU_DIR=/backup
DATA_DIR=$TARGET
# tar source files
TAR_FILES="$*"
# timestamp and logfile
TIMESTAMP=`date +'%Y%m%d'`
LOGFILE=$BU_DIR/$TIMESTAMP.$NAME.backup.log

# create backup directory
mkdir -p $BU_DIR
# remove old logfile
rm -f $LOGFILE

( # redirect all to logfile

# this is our backup
TARDESTFILE=$BU_DIR/$TIMESTAMP.$NAME.tar.gz
rm -f $TARDESTFILE

# tar options
TAR_PRE_OPTIONS="-czf $TARDESTFILE"
TAR_POST_OPTIONS=""

# tar takes place in the data directory
pushd $DATA_DIR >/dev/null

# now tar and compress the directories to back up
tar $TAR_PRE_OPTIONS $TAR_FILES $TAR_POST_OPTIONS
set_tar_exit $?

echo done creating backups at `date`

# clean up takes place in the backup directory
pushd $BU_DIR >/dev/null
# delete archives and logfiles older than 4 days
find . -depth \( -name '*.log' -o -name '*.tar.gz' \) -mtime +4 -exec echo deleting old file {} \; -delete
# restore directory now we are done
popd >/dev/null

# restore directory now we are done
popd >/dev/null

) 1>>${LOGFILE} 2> >( tee -a ${LOGFILE} >&2 )

echo all done at `date`

if get_tar_exit
then
   exit 0
else
   echo There were tar errors >&2
   exit 1
fi