3 # Copyright (C) 1998, 2002, 2004, 2007 Free Software Foundation
4 # Copyright (C) 1993 Jean-loup Gailly
6 # This program is free software; you can redistribute it and/or modify
7 # it under the terms of the GNU General Public License as published by
8 # the Free Software Foundation; either version 2 of the License, or
9 # (at your option) any later version.
11 # This program is distributed in the hope that it will be useful,
12 # but WITHOUT ANY WARRANTY; without even the implied warranty of
13 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 # GNU General Public License for more details.
16 # You should have received a copy of the GNU General Public License along
17 # with this program; if not, write to the Free Software Foundation, Inc.,
18 # 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
20 PATH="BINDIR:$PATH"; export PATH
22 version="znew (gzip) @VERSION@
23 Copyright (C) 2007 Free Software Foundation, Inc.
24 This is free software. You may redistribute copies of it under the terms of
25 the GNU General Public License <http://www.gnu.org/licenses/gpl.html>.
26 There is NO WARRANTY, to the extent permitted by law.
28 Written by Jean-loup Gailly."
30 usage="Usage: $0 [OPTION]... [FILE]...
31 Recompress files from .Z (compress) format to .gz (gzip) format.
35 -f Force recompression even if a .gz file already exists.
36 -t Test the new files before deleting originals.
37 -v Verbose; display name and statistics for each file compressed.
38 -9 Use the slowest compression method (optimal compression).
39 -P Use pipes for the conversion to reduce disk space usage.
40 -K Keep a .Z file when it is smaller than the .gz file.
41 --help display this help and exit
42 --version output version information and exit
44 Report bugs to <bug-gzip@gnu.org>."
55 # block is the disk block size (best guess, need not be exact)
57 warn="(does not preserve modes and timestamp)"
58 tmp=${TMPDIR-/tmp}/zfoo.$$
60 echo hi > $tmp || exit
61 if test -z "`(${CPMOD-cpmod} $tmp $tmp) 2>&1`"; then
66 if test -z "$cpmod" && ${TOUCH-touch} -r $tmp $tmp 2>/dev/null; then
67 cpmod="${TOUCH-touch}"
69 warn="(does not preserve file modes)"
72 # check if GZIP env. variable uses -S or --suffix
74 ext=`echo $tmp* | sed "s|$tmp||"`
76 if test -z "$ext"; then
77 echo znew: error determining gzip extension
80 if test "$ext" = ".Z"; then
81 echo znew: cannot use .Z as gzip extension.
88 --help) exec echo "$usage";;
89 --version) exec echo "$version";;
90 -*) opt="$opt $arg"; shift;;
95 if test $# -eq 0; then
100 opt=`echo "$opt" | sed -e 's/ //g' -e 's/-//g'`
102 *t*) check=1; opt=`echo "$opt" | sed 's/t//g'`
105 *K*) keep=1; opt=`echo "$opt" | sed 's/K//g'`
108 *P*) pipe=1; opt=`echo "$opt" | sed 's/P//g'`
110 if test -n "$opt"; then
115 n=`echo $i | sed 's/.Z$//'`
116 if test ! -f "$n.Z" ; then
120 test $keep -eq 1 && old=`wc -c < "$n.Z"`
121 if test $pipe -eq 1; then
122 if gzip -d < "$n.Z" | gzip $opt > "$n$ext"; then
123 # Copy file attributes from old file to new one, if possible.
124 test -n "$cpmod" && $cpmod $cpmodarg "$n.Z" "$n$ext" 2> /dev/null
126 echo error while recompressing $n.Z
130 if test $check -eq 1; then
131 if cp -p "$n.Z" "$n.$$" 2> /dev/null || cp "$n.Z" "$n.$$"; then
134 echo cannot backup "$n.Z"
138 if gzip -d "$n.Z"; then
141 test $check -eq 1 && mv "$n.$$" "$n.Z"
142 echo error while uncompressing $n.Z
145 if gzip $opt "$n"; then
148 if test $check -eq 1; then
149 mv "$n.$$" "$n.Z" && rm -f "$n"
150 echo error while recompressing $n
152 # compress $n (might be dangerous if disk full)
153 echo error while recompressing $n, left uncompressed
158 test $keep -eq 1 && new=`wc -c < "$n$ext"`
159 if test $keep -eq 1 && test `expr \( $old + $block - 1 \) / $block` -lt \
160 `expr \( $new + $block - 1 \) / $block`; then
161 if test $pipe -eq 1; then
163 elif test $check -eq 1; then
164 mv "$n.$$" "$n.Z" && rm -f "$n$ext"
166 gzip -d "$n$ext" && compress "$n" && rm -f "$n$ext"
168 echo "$n.Z smaller than $n$ext -- unchanged"
170 elif test $check -eq 1; then
171 if gzip -t "$n$ext" ; then
174 test $pipe -eq 0 && mv "$n.$$" "$n.Z"
176 echo error while testing $n$ext, $n.Z unchanged
179 elif test $pipe -eq 1; then