release/src/router/busybox/examples/undeb

   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 #
   7 usage() {
   8         cat <<EOF
   9 Usage: 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>
  13 EOF
  14         exit
  15 }
  16
  17 deb=$2
  18
  19 exist() {
  20         if [ -z "${deb}" ]; then
  21                 usage
  22         elif [ ! -s "${deb}" ]; then
  23                 echo "Can't find ${deb}!"
  24                 exit 1
  25         fi
  26 }
  27
  28 if [ -z "$1" ]; then
  29         usage
  30 elif [ "$1" = "-l" ]; then
  31         exist
  32         type more >/dev/null 2>&1 && pager=more
  33         type less >/dev/null 2>&1 && pager=less
  34         [ -z "${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
  41 elif [ "$1" = "-c" ]; then
  42         exist
  43         ar -p "${deb}" control.tar.gz | tar -xzO *control
  44         exit
  45 elif [ "$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
  57 else
  58         usage
  59 fi