#!/bin/sh
-# Copyright (C) 1998, 2002, 2004, 2007 Free Software Foundation
+# Copyright (C) 1998, 2002, 2004, 2007, 2010-2018 Free Software Foundation,
+# Inc.
# 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 of the License, or
+# the Free Software Foundation; either version 3 of the License, or
# (at your option) any later version.
# This program is distributed in the hope that it will be useful,
# with this program; if not, write to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
-PATH="BINDIR:$PATH"; export PATH
-
version="znew (gzip) @VERSION@
-Copyright (C) 2007 Free Software Foundation, Inc.
+Copyright (C) 2010-2018 Free Software Foundation, Inc.
This is free software. You may redistribute copies of it under the terms of
-the GNU General Public License <http://www.gnu.org/licenses/gpl.html>.
+the GNU General Public License <https://www.gnu.org/licenses/gpl.html>.
There is NO WARRANTY, to the extent permitted by law.
Written by Jean-loup Gailly."
-v Verbose; display name and statistics for each file compressed.
-9 Use the slowest compression method (optimal compression).
-P Use pipes for the conversion to reduce disk space usage.
- -K Keep a .Z file when it is smaller than the .gz file.
+ -K Keep a .Z file when it is smaller than the .gz file; implies -t.
--help display this help and exit
--version output version information and exit
block=1024
# block is the disk block size (best guess, need not be exact)
-warn="(does not preserve modes and timestamp)"
-tmp=${TMPDIR-/tmp}/zfoo.$$
-set -C
-echo hi > $tmp || exit
-if test -z "`(${CPMOD-cpmod} $tmp $tmp) 2>&1`"; then
- cpmod=${CPMOD-cpmod}
- warn=""
-fi
-
-if test -z "$cpmod" && ${TOUCH-touch} -r $tmp $tmp 2>/dev/null; then
- cpmod="${TOUCH-touch}"
- cpmodarg="-r"
- warn="(does not preserve file modes)"
-fi
-
-# check if GZIP env. variable uses -S or --suffix
-gzip -q $tmp
-ext=`echo $tmp* | sed "s|$tmp||"`
-rm -f $tmp*
-if test -z "$ext"; then
- echo znew: error determining gzip extension
- exit 1
-fi
-if test "$ext" = ".Z"; then
- echo znew: cannot use .Z as gzip extension.
- exit 1
-fi
+# Beware -s or --suffix in $GZIP.
+unset GZIP
+ext=.gz
for arg
do
case "$arg" in
- --help) exec echo "$usage";;
- --version) exec echo "$version";;
+ --help) printf '%s\n' "$usage" || exit 1; exit;;
+ --version) printf '%s\n' "$version" || exit 1; exit;;
-*) opt="$opt $arg"; shift;;
*) break;;
esac
done
if test $# -eq 0; then
- echo "$usage"
+ echo >&2 "$0: invalid number of operands; try \`$0 --help' for help"
exit 1
fi
-opt=`echo "$opt" | sed -e 's/ //g' -e 's/-//g'`
+opt=`printf '%s\n' "$opt" | sed -e 's/ //g' -e 's/-//g'`
case "$opt" in
- *t*) check=1; opt=`echo "$opt" | sed 's/t//g'`
+ *t*) check=1; opt=`printf '%s\n' "$opt" | sed 's/t//g'`
esac
case "$opt" in
- *K*) keep=1; opt=`echo "$opt" | sed 's/K//g'`
+ *K*) keep=1; check=1; opt=`printf '%s\n' "$opt" | sed 's/K//g'`
esac
case "$opt" in
- *P*) pipe=1; opt=`echo "$opt" | sed 's/P//g'`
+ *P*) pipe=1; opt=`printf '%s\n' "$opt" | sed 's/P//g'`
esac
if test -n "$opt"; then
opt="-$opt"
fi
for i do
- n=`echo $i | sed 's/.Z$//'`
+ n=`printf '%s\n' "$i" | sed 's/.Z$//'`
if test ! -f "$n.Z" ; then
- echo $n.Z not found
+ printf '%s\n' "$n.Z not found"
res=1; continue
fi
test $keep -eq 1 && old=`wc -c < "$n.Z"`
if test $pipe -eq 1; then
if gzip -d < "$n.Z" | gzip $opt > "$n$ext"; then
# Copy file attributes from old file to new one, if possible.
- test -n "$cpmod" && $cpmod $cpmodarg "$n.Z" "$n$ext" 2> /dev/null
+ touch -r"$n.Z" -- "$n$ext" 2>/dev/null
+ chmod --reference="$n.Z" -- "$n$ext" 2>/dev/null
else
- echo error while recompressing $n.Z
+ printf '%s\n' "error while recompressing $n.Z"
res=1; continue
fi
else
if test $check -eq 1; then
- if cp -p "$n.Z" "$n.$$" 2> /dev/null || cp "$n.Z" "$n.$$"; then
- :
+ if cp -p "$n.Z" "$n.$$"; then
+ :
else
- echo cannot backup "$n.Z"
+ printf '%s\n' "cannot backup $n.Z"
res=1; continue
fi
fi
:
else
test $check -eq 1 && mv "$n.$$" "$n.Z"
- echo error while uncompressing $n.Z
+ printf '%s\n' "error while uncompressing $n.Z"
res=1; continue
fi
if gzip $opt "$n"; then
:
else
if test $check -eq 1; then
- mv "$n.$$" "$n.Z" && rm -f "$n"
- echo error while recompressing $n
+ mv "$n.$$" "$n.Z" && rm -f "$n"
+ printf '%s\n' "error while recompressing $n"
else
- # compress $n (might be dangerous if disk full)
- echo error while recompressing $n, left uncompressed
+ # compress $n (might be dangerous if disk full)
+ printf '%s\n' "error while recompressing $n, left uncompressed"
fi
res=1; continue
fi
fi
test $keep -eq 1 && new=`wc -c < "$n$ext"`
if test $keep -eq 1 && test `expr \( $old + $block - 1 \) / $block` -lt \
- `expr \( $new + $block - 1 \) / $block`; then
+ `expr \( $new + $block - 1 \) / $block`; then
if test $pipe -eq 1; then
rm -f "$n$ext"
- elif test $check -eq 1; then
- mv "$n.$$" "$n.Z" && rm -f "$n$ext"
else
- gzip -d "$n$ext" && compress "$n" && rm -f "$n$ext"
+ mv "$n.$$" "$n.Z" && rm -f "$n$ext"
fi
- echo "$n.Z smaller than $n$ext -- unchanged"
+ printf '%s\n' "$n.Z smaller than $n$ext -- unchanged"
elif test $check -eq 1; then
if gzip -t "$n$ext" ; then
else
test $pipe -eq 0 && mv "$n.$$" "$n.Z"
rm -f "$n$ext"
- echo error while testing $n$ext, $n.Z unchanged
+ printf '%s\n' "error while testing $n$ext, $n.Z unchanged"
res=1; continue
fi
elif test $pipe -eq 1; then
projects / debian / gzip / blobdiff