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|
#! /bin/bash
#
# xpack - simple tool for handling self-extracting archives
#
# Author: Michael Towers <gradgrind[at]online[dot]de>
#
# xpack is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# xpack is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with xpack; if not, write to the Free Software Foundation, Inc.,
# 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
#
#----------------------------------------------------------------------------
#
# version 1.1
# This script serves both as packer and extracter, according to the name used
# to invoke it. When invoked as 'xpack', it will copy itself to the archive
# file (passed on the command line) and then append a tar.gz archive of the
# source directory (passed on the command line). E.g.
# ./xpack path/to/archive xarchive
# To extract the archive, simply run the resulting archive file, passing a
# directory into which it should be unpacked on the command line. E.g.
# ./xarchive newpath/to/directory
# or, bash xarchive newpath/to/directory
if [ "$( basename "$0" )" != "xpack" ]; then
# extract archive
if [ ! -d "$1" ]; then
echo "ERROR: Destination directory not found"
echo "Usage:"
echo " ${APP} <directory> - Unpack this archive to <directory> (which must exist)"
exit 1
fi
# The following lines allow the implementation of the '-r' option to xpack.
# The version of this script which is copied to the generated archive file will,
# in that case, have the '#+#' removed.
#+# # test if the script is started by root user. If not, exit
#+# if [ $UID -ne 0 ]; then
#+# echo "Only root can run $0"; exit 1
#+# fi
echo "Extracting archive to $1"
let "SKIP = $( grep --binary-files=text -n -m 1 "^#__ARCHIVE__" "$0" | cut -d ':' -f 1 ) + 1"
tail -n +$SKIP "$0" | tar -xzC "$1"
exit 0
fi
usage () {
echo
echo "Usage:"
echo " ${APP} [-dr] <directory> <archive file>"
echo " Create self-extracting archive from <directory>"
echo
echo " -d Don't include the base directory"
echo " -r Require root permissions for extracting"
echo
exit 1
}
NOBASE=""
ROOT=""
while getopts ":dr" Option
do
case ${Option} in
d ) NOBASE="-d" ;;
r ) ROOT="-r" ;;
* ) usage ;;
esac
done
shift $((${OPTIND} - 1))
if [ ! -d "$1" ]; then
echo "ERROR: Source directory not found"
usage
fi
if [ -e "$2" ]; then
echo "ERROR: Destination file exists"
usage
fi
cp $0 $2
if [ $? -ne 0 ]; then
echo "ERROR: Cannot write to destination file"
usage
fi
if [ -n "${ROOT}" ]; then
if [ $UID -ne 0 ]; then
echo "Only root can use the -r opton"
exit 1
fi
sed -i 's|^#+#||g' $2
fi
DIR="$( readlink -f $1 )"
BASE="."
if [ -z "${NOBASE}" ]; then
DIR="$( dirname ${DIR} )"
if [ $? -ne 0 ]; then echo "dirname -f ${DIR} ... failed"; usage; fi
BASE="$( basename $1 )"
fi
# tar to standard output adds a load of nulls to the output,
# which is a bit untidy and results in warnings, so do it this way:
tar czf $2_ -C ${DIR} ${BASE}
cat $2_ >> $2
rm $2_
# DO NOT delete the next line, which MUST be the last line of 'xpack'
#__ARCHIVE__
|
