66 lines
2.0 KiB
Plaintext
66 lines
2.0 KiB
Plaintext
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#!/bin/sh
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# zforce: force a gz extension on all gzip files so that gzip will not
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# compress them twice.
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#
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# This can be useful for files with names truncated after a file transfer.
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# 12345678901234 is renamed to 12345678901.gz
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# Copyright (C) 2002, 2007, 2010-2018 Free Software Foundation, Inc.
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# Copyright (C) 1993 Jean-loup Gailly
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 3 of the License, or
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# (at your option) any later version.
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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# You should have received a copy of the GNU General Public License along
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# with this program; if not, write to the Free Software Foundation, Inc.,
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# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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version="zforce (gzip) 1.10
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Copyright (C) 2010-2018 Free Software Foundation, Inc.
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This is free software. You may redistribute copies of it under the terms of
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the GNU General Public License <https://www.gnu.org/licenses/gpl.html>.
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There is NO WARRANTY, to the extent permitted by law.
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Written by Jean-loup Gailly."
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usage="Usage: $0 [FILE]...
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Force a .gz extension on all compressed FILEs so that gzip will
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not compress them twice.
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Report bugs to <bug-gzip@gnu.org>."
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if test $# = 0; then
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printf >&2 '%s\n' "$0: invalid number of operands; try \`$0 --help' for help"
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exit 1
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fi
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res=0
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for i do
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case "$i" in
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--h*) printf '%s\n' "$usage" || exit 1; exit;;
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--v*) printf '%s\n' "$version" || exit 1; exit;;
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*[-.]z | *[-.]gz | *.t[ag]z) continue;;
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esac
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if test ! -f "$i" ; then
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printf '%s\n' "zforce: $i not a file"
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res=1
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continue
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fi
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if gzip -lv < "$i" 2>/dev/null | grep '^defl' > /dev/null; then
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new="$i.gz"
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mv "$i" "$new" && printf '%s\n' "$i -- replaced with $new" || res=1
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fi
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done
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exit $res
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