usr.bin/gzip/zforce

   1 #!/bin/sh -
   2 #
   3 # $NetBSD: zforce,v 1.2 2003/12/28 12:43:43 wiz Exp $
   4 # $DragonFly: src/usr.bin/gzip/zforce,v 1.1 2004/10/26 11:19:31 joerg Exp $
   5 # $OpenBSD: zforce,v 1.2 2003/08/05 18:22:17 deraadt Exp $
   6 #
   7 # Copyright (c) 2003 Otto Moerbeek <otto@drijf.net>
   8 #
   9 # Permission to use, copy, modify, and distribute this software for any
  10 # purpose with or without fee is hereby granted, provided that the above
  11 # copyright notice and this permission notice appear in all copies.
  12 #
  13 # THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  14 # WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  15 # MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  16 # ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  17 # WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  18 # ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  19 # OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  20 #
  21 prog=`basename $0`
  22 USAGE="usage: $prog file ..."
  23 if test $# -eq 0; then
  24         echo $USAGE
  25         exit 1
  26 fi
  27
  28 ret=0
  29
  30 while test $# -ne 0; do
  31         case "$1" in
  32                 *[._-]gz)
  33                         shift
  34                         ;;
  35                 *.t[ag]z)
  36                         shift
  37                         ;;
  38                 *)
  39                         if file "$1" |
  40                                 grep -q "gzip compressed data" 2> /dev/null
  41                         then
  42                                 n="$1".gz
  43                                 if mv "$1" "$n" 2> /dev/null; then
  44                                         echo "$1" -- renamed to "$n"
  45                                 else
  46                                         ret=1
  47                                         echo $prog: cannot rename "$1" to "$n"
  48                                 fi
  49                         fi
  50                         shift
  51                         ;;
  52         esac
  53 done
  54 exit $ret