JezK
Edit File: znew
#!/bin/sh # 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 3 of the License, 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., # 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. version="znew (gzip) 1.9 Copyright (C) 2010-2017 Free Software Foundation, Inc. This is free software. You may redistribute copies of it under the terms of 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." usage="Usage: $0 [OPTION]... [FILE]... Recompress files from .Z (compress) format to .gz (gzip) format. Options: -f Force recompression even if a .gz file already exists. -t Test the new files before deleting originals. -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; implies -t. --help display this help and exit --version output version information and exit Report bugs to <bug-gzip@gnu.org>." check=0 pipe=0 opt= files= keep=0 res=0 old=0 new=0 block=1024 # block is the disk block size (best guess, need not be exact) # Beware -s or --suffix in $GZIP. unset GZIP ext=.gz for arg do case "$arg" in --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 >&2 "$0: invalid number of operands; try \`$0 --help' for help" exit 1 fi opt=`printf '%s\n' "$opt" | sed -e 's/ //g' -e 's/-//g'` case "$opt" in *t*) check=1; opt=`printf '%s\n' "$opt" | sed 's/t//g'` esac case "$opt" in *K*) keep=1; check=1; opt=`printf '%s\n' "$opt" | sed 's/K//g'` esac case "$opt" in *P*) pipe=1; opt=`printf '%s\n' "$opt" | sed 's/P//g'` esac if test -n "$opt"; then opt="-$opt" fi for i do n=`printf '%s\n' "$i" | sed 's/.Z$//'` if test ! -f "$n.Z" ; then printf '%s\n' "$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$ext"; then # Copy file attributes from old file to new one, if possible. touch -r"$n.Z" -- "$n$ext" 2>/dev/null chmod --reference="$n.Z" -- "$n$ext" 2>/dev/null else 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.$$"; then : else printf '%s\n' "cannot backup $n.Z" res=1; continue fi fi if gzip -d "$n.Z"; then : else test $check -eq 1 && mv "$n.$$" "$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" printf '%s\n' "error while recompressing $n" else # 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 if test $pipe -eq 1; then rm -f "$n$ext" else mv "$n.$$" "$n.Z" && rm -f "$n$ext" fi printf '%s\n' "$n.Z smaller than $n$ext -- unchanged" elif test $check -eq 1; then if gzip -t "$n$ext" ; then rm -f "$n.$$" "$n.Z" else test $pipe -eq 0 && mv "$n.$$" "$n.Z" rm -f "$n$ext" printf '%s\n' "error while testing $n$ext, $n.Z unchanged" res=1; continue fi elif test $pipe -eq 1; then rm -f "$n.Z" fi done exit $res