diff options
Diffstat (limited to 'file_cmds/gzip/znew')
| -rw-r--r-- | file_cmds/gzip/znew | 137 |
1 files changed, 137 insertions, 0 deletions
diff --git a/file_cmds/gzip/znew b/file_cmds/gzip/znew new file mode 100644 index 0000000..4a84f58 --- /dev/null +++ b/file_cmds/gzip/znew @@ -0,0 +1,137 @@ +#!/bin/sh - +# +# $NetBSD: znew,v 1.3 2008/04/27 09:07:13 nakayama Exp $ +# $OpenBSD: znew,v 1.2 2003/08/05 18:22:17 deraadt Exp $ +# +#- +# Copyright (c) 2003 Otto Moerbeek <otto@drijf.net> +# +# Permission to use, copy, modify, and distribute this software for any +# purpose with or without fee is hereby granted, provided that the above +# copyright notice and this permission notice appear in all copies. +# +# THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES +# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF +# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR +# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES +# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN +# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF +# OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. +# +# $FreeBSD: src/usr.bin/gzip/znew,v 1.3 2008/06/30 23:53:15 delphij Exp $ + +# Return 0 if the first arg file size is smaller than the second, 1 otherwise. +smaller () { + a=`du -k "$1" | awk '{ print $1 }'` + b=`du -k "$2" | awk '{ print $1 }'` + test $a -lt $b +} + +# Check gzip integrity if the -t flag is specified +checkfile () { + if test $tflag -eq 1; then + gzip -qt < "$1" + fi +} + +# Decompress a file and then gzip it +process () { + prefix="${1%.Z}" + filez="$prefix".Z + filegz="$prefix".gz + + if test ! -e "$filez"; then + echo "$prog: $filez does not exist" + return 1 + fi + if test ! -f "$filez"; then + echo "$prog: $filez is not a regular file" + return 1 + fi + if test -e "$filegz" -a $fflag -eq 0; then + echo "$prog: $filegz already exists" + return 1 + fi + + tmp=`mktemp /tmp/znewXXXXXXXXXX` || { + echo "$prog: cannot create tmp file" + return 1 + } + trap 'rm -f "$tmp"; exit 1' HUP INT QUIT PIPE TERM + + # Do the actual work, producing a file "$tmp" + if uncompress -f -c < "$filez" | gzip -f -c $gzipflags > "$tmp"; then + if test $kflag -eq 1 && smaller "$filez" "$tmp"; then + echo -n "$prog: $filez is smaller than $filegz" + echo "; keeping it" + rm -f "$tmp" + return 0 + fi + if ! checkfile "$tmp"; then + echo "$prog: integrity check of $tmp failed" + rm -f "$tmp" + return 1; + fi + + # Try to keep the mode of the original file + if ! cp -fp "$filez" "$filegz"; then + echo "$prog: warning: could not keep mode of $filez" + fi + if ! cp "$tmp" "$filegz" 2> /dev/null; then + echo "$prog: warning: could not keep mode of $filez" + if ! cp -f "$tmp" "$filegz" 2> /dev/null; then + echo "$prog: could not copy $tmp to $filegz" + rm -f "$filegz" "$tmp" + return 1 + fi + fi + if ! touch -fr "$filez" "$filegz"; then + echo -n "$prog: warning: could not keep timestamp of " + echo "$filez" + fi + rm -f "$filez" "$tmp" + else + echo "$prog: failed to process $filez" + rm -f "$tmp" + return 1 + fi +} + +prog=`basename "$0"` +usage="usage: $prog [-ftv9K] file ..." + +fflag=0 +tflag=0 +kflag=0 +gzipflags= + +# -P flag is recognized to maintain compatibility, but ignored. Pipe mode is +# always used +while getopts :ftv9PK i; do + case $i in + f) fflag=1;; + t) tflag=1;; + v) gzipflags="-v $gzipflags";; + 9) gzipflags="-9 $gzipflags";; + P) ;; + K) kflag=1;; + \?) echo "$usage"; exit 1;; + esac +done + +shift $((OPTIND - 1)) + +if test $# -eq 0; then + echo "$usage" + exit 1 +fi + +rc=0 + +while test $# -ne 0; do + if ! process "$1"; then + rc=$? + fi + shift +done +exit $rc |