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zforce
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2003-07-24
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59 lines
#!/bin/sh
# zforce: force a gz extension on all gzip files so that gzip will not
# compress them twice.
#
# This can be useful for files with names truncated after a file transfer.
# 12345678901234 is renamed to 12345678901.gz
# Copyright (C) 2002 Free Software Foundation
# Copyright (C) 1993 Jean-loup Gailly
# 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 Free Software Foundation; either version 2, 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.
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
# 02111-1307, USA.
PATH="/usr/bin:$PATH"; export PATH
x=`basename $0`
if test $# = 0; then
echo "force a '.gz' extension on all gzip files"
echo usage: $x files...
exit 1
fi
res=0
for i do
if test ! -f "$i" ; then
echo ${x}: $i not a file
res=1
continue
fi
case "$i" in
*[-.]z | *[-.]gz | *.t[ag]z) continue;;
esac
if gzip -lv < "$i" 2>/dev/null | grep '^defl' > /dev/null; then
new="$i.gz"
if mv "$i" "$new"; then
echo $i -- replaced with $new
else
res=$?
fi
fi
done
exit $res