138 lines
3.2 KiB
Bash
138 lines
3.2 KiB
Bash
#!/bin/sh -
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#
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# $NetBSD: znew,v 1.3 2008/04/27 09:07:13 nakayama Exp $
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# $OpenBSD: znew,v 1.2 2003/08/05 18:22:17 deraadt Exp $
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#
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#-
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# Copyright (c) 2003 Otto Moerbeek <otto@drijf.net>
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#
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# Permission to use, copy, modify, and distribute this software for any
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# purpose with or without fee is hereby granted, provided that the above
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# copyright notice and this permission notice appear in all copies.
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#
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# THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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# OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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#
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# $FreeBSD$
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# Return 0 if the first arg file size is smaller than the second, 1 otherwise.
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smaller () {
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a=`du -k "$1" | awk '{ print $1 }'`
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b=`du -k "$2" | awk '{ print $1 }'`
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test $a -lt $b
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}
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# Check gzip integrity if the -t flag is specified
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checkfile () {
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if test $tflag -eq 1; then
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gzip -qt < "$1"
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fi
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}
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# Decompress a file and then gzip it
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process () {
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prefix="${1%.Z}"
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filez="$prefix".Z
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filegz="$prefix".gz
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if test ! -e "$filez"; then
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echo "$prog: $filez does not exist"
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return 1
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fi
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if test ! -f "$filez"; then
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echo "$prog: $filez is not a regular file"
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return 1
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fi
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if test -e "$filegz" -a $fflag -eq 0; then
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echo "$prog: $filegz already exists"
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return 1
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fi
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tmp=`mktemp /tmp/znewXXXXXXXXXX` || {
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echo "$prog: cannot create tmp file"
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return 1
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}
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trap 'rm -f "$tmp"; exit 1' HUP INT QUIT PIPE TERM
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# Do the actual work, producing a file "$tmp"
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if uncompress -f -c < "$filez" | gzip -f -c $gzipflags > "$tmp"; then
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if test $kflag -eq 1 && smaller "$filez" "$tmp"; then
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echo -n "$prog: $filez is smaller than $filegz"
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echo "; keeping it"
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rm -f "$tmp"
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return 0
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fi
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if ! checkfile "$tmp"; then
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echo "$prog: integrity check of $tmp failed"
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rm -f "$tmp"
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return 1;
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fi
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# Try to keep the mode of the original file
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if ! cp -fp "$filez" "$filegz"; then
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echo "$prog: warning: could not keep mode of $filez"
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fi
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if ! cp "$tmp" "$filegz" 2> /dev/null; then
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echo "$prog: warning: could not keep mode of $filez"
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if ! cp -f "$tmp" "$filegz" 2> /dev/null; then
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echo "$prog: could not copy $tmp to $filegz"
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rm -f "$filegz" "$tmp"
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return 1
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fi
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fi
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if ! touch -fr "$filez" "$filegz"; then
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echo -n "$prog: warning: could not keep timestamp of "
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echo "$filez"
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fi
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rm -f "$filez" "$tmp"
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else
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echo "$prog: failed to process $filez"
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rm -f "$tmp"
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return 1
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fi
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}
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prog=`basename "$0"`
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usage="usage: $prog [-ftv9K] file ..."
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fflag=0
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tflag=0
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kflag=0
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gzipflags=
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# -P flag is recognized to maintain compatibility, but ignored. Pipe mode is
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# always used
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while getopts :ftv9PK i; do
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case $i in
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f) fflag=1;;
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t) tflag=1;;
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v) gzipflags="-v $gzipflags";;
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9) gzipflags="-9 $gzipflags";;
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P) ;;
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K) kflag=1;;
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\?) echo "$usage"; exit 1;;
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esac
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done
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shift $((OPTIND - 1))
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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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rc=0
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while test $# -ne 0; do
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if ! process "$1"; then
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rc=$?
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fi
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shift
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done
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exit $rc
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