1#!/bin/sh - 2# 3# $NetBSD: znew,v 1.3 2008/04/27 09:07:13 nakayama Exp $ 4# $OpenBSD: znew,v 1.2 2003/08/05 18:22:17 deraadt Exp $ 5# 6# Copyright (c) 2003 Otto Moerbeek <otto@drijf.net> 7# 8# Permission to use, copy, modify, and distribute this software for any 9# purpose with or without fee is hereby granted, provided that the above 10# copyright notice and this permission notice appear in all copies. 11# 12# THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 13# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 14# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 15# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 16# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 17# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 18# OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 19# 20 21# Return 0 if the first arg file size is smaller than the second, 1 otherwise. 22smaller () { 23 a=`du -k "$1" | awk '{ print $1 }'` 24 b=`du -k "$2" | awk '{ print $1 }'` 25 test $a -lt $b 26} 27 28# Check gzip integrity if the -t flag is specified 29checkfile () { 30 if test $tflag -eq 1; then 31 gzip -qt < "$1" 32 fi 33} 34 35# Decompress a file and then gzip it 36process () { 37 prefix="${1%.Z}" 38 filez="$prefix".Z 39 filegz="$prefix".gz 40 41 if test ! -e "$filez"; then 42 echo "$prog: $filez does not exist" 43 return 1 44 fi 45 if test ! -f "$filez"; then 46 echo "$prog: $filez is not a regular file" 47 return 1 48 fi 49 if test -e "$filegz" -a $fflag -eq 0; then 50 echo "$prog: $filegz already exists" 51 return 1 52 fi 53 54 tmp=`mktemp /tmp/znewXXXXXXXXXX` || { 55 echo "$prog: cannot create tmp file" 56 return 1 57 } 58 trap 'rm -f "$tmp"; exit 1' HUP INT QUIT PIPE TERM 59 60 # Do the actual work, producing a file "$tmp" 61 if uncompress -f -c < "$filez" | gzip -f $gzipflags > "$tmp"; then 62 63 if test $kflag -eq 1 && smaller "$filez" "$tmp"; then 64 echo -n "$prog: $filez is smaller than $filegz" 65 echo "; keeping it" 66 rm -f "$tmp" 67 return 0 68 fi 69 if ! checkfile "$tmp"; then 70 echo "$prog: integrity check of $tmp failed" 71 rm -f "$tmp" 72 return 1; 73 fi 74 75 # Try to keep the mode of the original file 76 if ! cp -fp "$filez" "$filegz"; then 77 echo "$prog: warning: could not keep mode of $filez" 78 fi 79 if ! cp "$tmp" "$filegz" 2> /dev/null; then 80 echo "$prog: warning: could not keep mode of $filez" 81 if ! cp -f "$tmp" "$filegz" 2> /dev/null; then 82 echo "$prog: could not copy $tmp to $filegz" 83 rm -f "$filegz" "$tmp" 84 return 1 85 fi 86 fi 87 if ! touch -fr "$filez" "$filegz"; then 88 echo -n "$prog: warning: could not keep timestamp of " 89 echo "$filez" 90 fi 91 rm -f "$filez" "$tmp" 92 else 93 echo "$prog: failed to process $filez" 94 rm -f "$tmp" 95 return 1 96 fi 97} 98 99prog=`basename "$0"` 100usage="usage: $prog [-9fKtv] file ..." 101 102fflag=0 103tflag=0 104kflag=0 105gzipflags= 106 107# -P flag is recognized to maintain compatibility, but ignored. Pipe mode is 108# always used 109while getopts :ftv9PK i; do 110 case $i in 111 f) fflag=1;; 112 t) tflag=1;; 113 v) gzipflags="-v $gzipflags";; 114 9) gzipflags="-9 $gzipflags";; 115 P) ;; 116 K) kflag=1;; 117 \?) echo "$usage"; exit 1;; 118 esac 119done 120 121shift $((OPTIND - 1)) 122 123if test $# -eq 0; then 124 echo "$usage" 125 exit 1 126fi 127 128rc=0 129 130while test $# -ne 0; do 131 if ! process "$1"; then 132 rc=$? 133 fi 134 shift 135done 136exit $rc 137