busybox/examples/undeb
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   1#!/bin/sh
   2#
   3# This should work with the GNU version of tar and gzip!
   4# This should work with the bash or ash shell!
   5# Requires the programs (ar, tar, gzip, and the pager more or less).
   6#
   7usage() {
   8        cat <<EOF
   9Usage: undeb -c package.deb            <Print control file info>
  10       undeb -l package.deb            <List contents of deb package>
  11       undeb -x package.deb /foo/boo   <Extract deb package to this directory,
  12                                        put . for current directory>
  13EOF
  14        exit
  15}
  16
  17deb=$2
  18
  19exist() {
  20        if [ -z "${deb}" ]; then
  21                usage
  22        elif [ ! -s "${deb}" ]; then
  23                echo "Can't find ${deb}!"
  24                exit 1
  25        fi
  26}
  27
  28if [ -z "$1" ]; then
  29        usage
  30elif [ "$1" = "-l" ]; then
  31        exist
  32        type more >/dev/null 2>&1 && pager=more
  33        type less >/dev/null 2>&1 && pager=less
  34        [ -z "${pager}" ] && echo "No pager found!" && exit 1
  35        (
  36                ar -p "${deb}" control.tar.gz | tar -xzO *control
  37                printf "\nPress enter to scroll, q to Quit!\n\n"
  38                ar -p "${deb}" data.tar.gz | tar -tzv
  39        ) | ${pager}
  40        exit
  41elif [ "$1" = "-c" ]; then
  42        exist
  43        ar -p "${deb}" control.tar.gz | tar -xzO *control
  44        exit
  45elif [ "$1" = "-x" ]; then
  46        exist
  47        if [ -z "$3" ]; then
  48                usage
  49        elif [ ! -d "$3" ]; then
  50                echo "No such directory $3!"
  51                exit 1
  52        fi
  53        ar -p "${deb}" data.tar.gz | tar -xzvpf - -C "$3" || exit
  54        echo
  55        echo "Extracted ${deb} to $3!"
  56        exit
  57else
  58        usage
  59fi
  60