zforce.in

   1 #!/bin/sh
   2 # zforce: force a gz extension on all gzip files so that gzip will not
   3 # compress them twice.
   4 #
   5 # This can be useful for files with names truncated after a file transfer.
   6 # 12345678901234 is renamed to 12345678901.gz
   7
   8
   9 # Copyright (C) 2002, 2007 Free Software Foundation
  10 # Copyright (C) 1993 Jean-loup Gailly
  11
  12 # This program is free software; you can redistribute it and/or modify
  13 # it under the terms of the GNU General Public License as published by
  14 # the Free Software Foundation; either version 2 of the License, or
  15 # (at your option) any later version.
  16
  17 # This program is distributed in the hope that it will be useful,
  18 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  19 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20 # GNU General Public License for more details.
  21
  22 # You should have received a copy of the GNU General Public License along
  23 # with this program; if not, write to the Free Software Foundation, Inc.,
  24 # 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  25
  26 bindir=@bindir@
  27 case $1 in
  28 --__bindir) bindir=${2?}; shift; shift;;
  29 esac
  30 PATH=$bindir:$PATH; export PATH
  31
  32 version="zforce (gzip) @VERSION@
  33 Copyright (C) 2007 Free Software Foundation, Inc.
  34 This is free software.  You may redistribute copies of it under the terms of
  35 the GNU General Public License <http://www.gnu.org/licenses/gpl.html>.
  36 There is NO WARRANTY, to the extent permitted by law.
  37
  38 Written by Jean-loup Gailly."
  39
  40 usage="Usage: $0 [FILE]...
  41 Force a .gz extension on all compressed FILEs so that gzip will
  42 not compress them twice.
  43
  44 Report bugs to <bug-gzip@gnu.org>."
  45
  46 if test $# = 0; then
  47   echo "$usage"
  48   exit 1
  49 fi
  50
  51 res=0
  52 for i do
  53   case "$i" in
  54   --h*) exec echo "$usage";;
  55   --v*) exec echo "$version";;
  56   *[-.]z | *[-.]gz | *.t[ag]z) continue;;
  57   esac
  58
  59   if test ! -f "$i" ; then
  60     echo zforce: $i not a file
  61     res=1
  62     continue
  63   fi
  64
  65   if gzip -lv < "$i" 2>/dev/null | grep '^defl' > /dev/null; then
  66
  67     new="$i.gz"
  68     if mv "$i" "$new"; then
  69       echo $i -- replaced with $new
  70     else
  71       res=$?
  72     fi
  73   fi
  74 done
  75 exit $res