Linuxo Forumi

#!/bin/bash

###########################################################################
#
# Shell program to Convert rpm and debian files to tar.gz format.
#
# Copyright 2001, USM Bish <bish@nde.vsnl.net.in>.
#
# This program is free software;  you can redistribute it and / or
# modify it under the terms of the  GNU General Public License  as
# published by the F ree Software Foundation;  either version 2 of
# the License, or (at your option) any later version.
#
# This program 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.
#
#
# Usage:
#
# 2tgz.sh [ -h | --help ] [-d filename.deb] [-r filename.rpm]
#
# Options:
#
# -h, --help      Display this help message and exit.
# -d  filename.deb      Convert .deb file to tar.gz
# -r  filename.rpm      Convert .rpm file to tar.gz
#
#
# Revisions:
#
# Aug/02/2001 File created   .......... Ver 0.1
#       Aug/02/2001     deb converter created ... Ver 0.2
#       Aug/03/2001     rpm converter added  .... Ver 0.3  
#
#       Dependencies on other utils:
#
#       o less      In case not installed, change value of
#                   MY_PAGER to your pager (viz view/ more etc.)
#       o ar        Needed for debian file conversion
#       o rpm2cpio  Needed for rpm conversion
#       o cpio      - do -
#
###########################################################################


###########################################################################
# Constants
###########################################################################

PROGNAME=$(basename $0)
VERSION="0.3"
TEMP_FILE=/tmp/${PROGNAME}.$$

MY_PAGER=/usr/bin/less

###########################################################################
# Functions
###########################################################################

function get_prefix
{
    echo $PACKAGE > $PROGNAME.1
    rev $PROGNAME.1 > $PROGNAME.2
    cat $PROGNAME.2 | cut -b 5- > $PROGNAME.1
    rev $PROGNAME.1 > $PROGNAME.2
    PREFIX=`cat $PROGNAME.2`
}

function view_tgz
{
   tar -tvvz < $PREFIX.tar.gz > $HOME/$PROGNAME.1
   cat $HOME/$PROGNAME.1 | awk '{print $1"\t"$3"\t"$6}' > $HOME/$PROGNAME.2
   echo -en "\nConstituents of tarball : $PREFIX.tar.gz\n\n" > $HOME/$PROGNAME.1
   echo -en "Permissions     Size    Contents\n\n" >> $HOME/$PROGNAME.1
   cat $HOME/$PROGNAME.2 >> $HOME/$PROGNAME.1
   cat $HOME/$PROGNAME.1 | $MY_PAGER
   clean_up
}

function done_message
{
   echo ""
   echo "Done .... Please unpack in a temporary directory"
   echo "Check that there are no filename conflicts ....."
   echo "You may like to do an *ldd* of binaries to check"
   echo "dependencies before installing."
   echo ""
   ls $PREFIX.*
   echo -en "\nView contents of "$PREFIX.tar.gz" [y/ n] .. "
   read YN
   if [ "$YN" = "y" ]; then
       view_tgz
   fi
   echo "Bye ... "  
}
   
function clean_up
{
        rm -f ${TEMP_FILE}
        rm -f $PROGNAME.1
        rm -f $PROGNAME.2
}


function graceful_exit
{
clean_up
exit
}


function error_exit
{
echo "${PROGNAME}: ${1:-"Unknown Error"}" >&2
clean_up
exit 1
}


function term_exit
{
echo "${PROGNAME}: Terminated"
clean_up
exit
}


function int_exit
{
echo "${PROGNAME}: Aborted by user"
clean_up
exit
}


function usage
{
echo "Usage: ${PROGNAME} [-h | --help] [-d filename.deb] [-r filename.rpm]"
}

function helptext
{
#####
# Function to display help message for program
# No arguments
#####

local tab=$(echo -en "\t\t")

cat <<- -EOF-

        ${PROGNAME} ver. ${VERSION}

        This is a program to Convert rpm and debian files to tar.gz format.

        $(usage)

        Options:

        -h, --help      Display this help message and exit.
        -d  filename.deb      Convert .deb file to tar.gz
        -r  filename.rpm      Convert .rpm file to tar.gz

        Example: ${PROGNAME} -d package.deb  (to convert a .deb file)
       
-EOF-
}


###########################################################################
# Program starts here
###########################################################################

# Trap TERM, HUP, and INT signals and properly exit

trap term_exit TERM HUP
trap int_exit INT

# Process command line arguments

if [ "$1" = "--help" ]; then
    helptext
    graceful_exit
fi

if [ "$1" = "" ]; then
   if [ "$2" = "" ]; then
      helptext
      graceful_exit
   fi
fi

# Process arguments - edit to taste

while getopts ":hd:r:" opt; do

    case $opt in
   
    d ) echo $PROGNAME"  Debian .deb conversion"

        PACKAGE="$2"
        get_prefix

        if [ -e $PACKAGE ]; then
            ar -x $PACKAGE
            rm -f control.tar.gz
            rm -f debian-binary
            mv data.tar.gz $PREFIX.tar.gz
            done_message
        else              # parm entered but incorrect
            echo "Debian package [$PACKAGE] not found"
            echo "Quitting ... "
            clean_up
            exit 1  
        fi
        ;;
   
    r ) echo $PROGNAME"  RedHat .rpm conversion"

        PACKAGE="$2"
        get_prefix

        if [ -e $PACKAGE ]; then
            PD=`pwd`
            mkdir /tmp/2tgz
            rpm2cpio $PACKAGE > /tmp/2tgz/$PREFIX.cpio
            cd /tmp/2tgz
            cpio --extract --preserve-modification-time --make-directories < $PREFIX.cpio 1> /dev/null 2> /dev/null
            TARGET=`ls -d */`
            tar -cvvzf $PREFIX.tar.gz $TARGET 1> /dev/null 2> /dev/null
            cp $PREFIX.tar.gz $PD
            cd /tmp
            rm -rf 2tgz/
            cd $PD
            done_message
        else              # parm entered but incorrect
            echo "RedHat package [$PACKAGE] not found"
            echo "Quitting ... "
            clean_up
            exit 1  
        fi
        ;;

    h ) helptext
        graceful_exit ;;
       
    * ) usage
exit 1

    esac

done

graceful_exit

#############################################################