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