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#!/bin/sh |
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|
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# Copyright (C) 1998, 2002, 2004, 2007 Free Software Foundation |
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# Copyright (C) 1993 Jean-loup Gailly |
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|
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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 2 of the License, or |
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# (at your option) any later version. |
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|
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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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|
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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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|
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PATH="${GZIP_BINDIR-'/usr/bin'}:$PATH"; export PATH |
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|
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version="znew (gzip) 1.3.12 |
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Copyright (C) 2007 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 <http://www.gnu.org/licenses/gpl.html>. |
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There is NO WARRANTY, to the extent permitted by law. |
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|
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Written by Jean-loup Gailly." |
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|
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usage="Usage: $0 [OPTION]... [FILE]... |
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Recompress files from .Z (compress) format to .gz (gzip) format. |
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|
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Options: |
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|
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-f Force recompression even if a .gz file already exists. |
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-t Test the new files before deleting originals. |
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-v Verbose; display name and statistics for each file compressed. |
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-9 Use the slowest compression method (optimal compression). |
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-P Use pipes for the conversion to reduce disk space usage. |
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-K Keep a .Z file when it is smaller than the .gz file. |
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--help display this help and exit |
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--version output version information and exit |
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|
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Report bugs to <bug-gzip@gnu.org>." |
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|
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check=0 |
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pipe=0 |
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opt= |
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files= |
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keep=0 |
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res=0 |
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old=0 |
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new=0 |
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block=1024 |
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# block is the disk block size (best guess, need not be exact) |
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|
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warn="(does not preserve modes and timestamp)" |
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tmp=${TMPDIR-/tmp}/zfoo.$$ |
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set -C |
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echo hi > $tmp || exit |
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if test -z "`(${CPMOD-cpmod} $tmp $tmp) 2>&1`"; then |
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cpmod=${CPMOD-cpmod} |
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warn="" |
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fi |
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|
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if test -z "$cpmod" && ${TOUCH-touch} -r $tmp $tmp 2>/dev/null; then |
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cpmod="${TOUCH-touch}" |
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cpmodarg="-r" |
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warn="(does not preserve file modes)" |
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fi |
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|
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# check if GZIP env. variable uses -S or --suffix |
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gzip -q $tmp |
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ext=`echo $tmp* | sed "s|$tmp||"` |
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rm -f $tmp* |
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if test -z "$ext"; then |
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echo znew: error determining gzip extension |
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exit 1 |
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fi |
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if test "$ext" = ".Z"; then |
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echo znew: cannot use .Z as gzip extension. |
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exit 1 |
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fi |
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|
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for arg |
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do |
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case "$arg" in |
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--help) exec echo "$usage";; |
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--version) exec echo "$version";; |
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-*) opt="$opt $arg"; shift;; |
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*) break;; |
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esac |
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done |
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|
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if test $# -eq 0; then |
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echo "$usage" |
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exit 1 |
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fi |
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|
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opt=`echo "$opt" | sed -e 's/ //g' -e 's/-//g'` |
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case "$opt" in |
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*t*) check=1; opt=`echo "$opt" | sed 's/t//g'` |
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esac |
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case "$opt" in |
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*K*) keep=1; opt=`echo "$opt" | sed 's/K//g'` |
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esac |
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case "$opt" in |
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*P*) pipe=1; opt=`echo "$opt" | sed 's/P//g'` |
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esac |
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if test -n "$opt"; then |
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opt="-$opt" |
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fi |
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|
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for i do |
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n=`echo $i | sed 's/.Z$//'` |
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if test ! -f "$n.Z" ; then |
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echo $n.Z not found |
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res=1; continue |
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fi |
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test $keep -eq 1 && old=`wc -c < "$n.Z"` |
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if test $pipe -eq 1; then |
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if gzip -d < "$n.Z" | gzip $opt > "$n$ext"; then |
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# Copy file attributes from old file to new one, if possible. |
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test -n "$cpmod" && $cpmod $cpmodarg "$n.Z" "$n$ext" 2> /dev/null |
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else |
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echo error while recompressing $n.Z |
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res=1; continue |
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fi |
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else |
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if test $check -eq 1; then |
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if cp -p "$n.Z" "$n.$$" 2> /dev/null || cp "$n.Z" "$n.$$"; then |
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: |
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else |
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echo cannot backup "$n.Z" |
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res=1; continue |
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fi |
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fi |
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if gzip -d "$n.Z"; then |
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: |
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else |
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test $check -eq 1 && mv "$n.$$" "$n.Z" |
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echo error while uncompressing $n.Z |
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res=1; continue |
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fi |
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if gzip $opt "$n"; then |
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: |
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else |
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if test $check -eq 1; then |
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mv "$n.$$" "$n.Z" && rm -f "$n" |
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echo error while recompressing $n |
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else |
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# compress $n (might be dangerous if disk full) |
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echo error while recompressing $n, left uncompressed |
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fi |
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res=1; continue |
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fi |
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fi |
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test $keep -eq 1 && new=`wc -c < "$n$ext"` |
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if test $keep -eq 1 && test `expr \( $old + $block - 1 \) / $block` -lt \ |
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`expr \( $new + $block - 1 \) / $block`; then |
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if test $pipe -eq 1; then |
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rm -f "$n$ext" |
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elif test $check -eq 1; then |
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mv "$n.$$" "$n.Z" && rm -f "$n$ext" |
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else |
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gzip -d "$n$ext" && compress "$n" && rm -f "$n$ext" |
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fi |
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echo "$n.Z smaller than $n$ext -- unchanged" |
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|
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elif test $check -eq 1; then |
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if gzip -t "$n$ext" ; then |
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rm -f "$n.$$" "$n.Z" |
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else |
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test $pipe -eq 0 && mv "$n.$$" "$n.Z" |
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rm -f "$n$ext" |
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echo error while testing $n$ext, $n.Z unchanged |
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res=1; continue |
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fi |
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elif test $pipe -eq 1; then |
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rm -f "$n.Z" |
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fi |
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done |
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exit $res |
