1#!/bin/ksh - 2# 3# $NetBSD: znew,v 1.3 2008/04/27 09:07:13 nakayama Exp $ 4# $DragonFly: src/usr.bin/gzip/znew,v 1.1 2004/10/26 11:19:31 joerg Exp $ 5# $OpenBSD: znew,v 1.2 2003/08/05 18:22:17 deraadt Exp $ 6# 7# Copyright (c) 2003 Otto Moerbeek <otto@drijf.net> 8# 9# Permission to use, copy, modify, and distribute this software for any 10# purpose with or without fee is hereby granted, provided that the above 11# copyright notice and this permission notice appear in all copies. 12# 13# THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 14# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 15# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 16# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 17# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 18# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 19# OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 20# 21 22# Return 0 if the first arg file size is smaller than the second, 1 otherwise. 23smaller () { 24 a=`du -k "$1" | awk '{ print $1 }'` 25 b=`du -k "$2" | awk '{ print $1 }'` 26 test $a -lt $b 27} 28 29# Check gzip integrity if the -t flag is specified 30checkfile () { 31 if test $tflag -eq 1; then 32 gzip -qt < "$1" 33 fi 34} 35 36# Decompress a file and then gzip it 37process () { 38 prefix="${1%.Z}" 39 filez="$prefix".Z 40 filegz="$prefix".gz 41 42 if test ! -e "$filez"; then 43 echo "$prog: $filez does not exist" 44 return 1 45 fi 46 if test ! -f "$filez"; then 47 echo "$prog: $filez is not a regular file" 48 return 1 49 fi 50 if test -e "$filegz" -a $fflag -eq 0; then 51 echo "$prog: $filegz already exists" 52 return 1 53 fi 54 55 tmp=`mktemp /tmp/znewXXXXXXXXXX` || { 56 echo "$prog: cannot create tmp file" 57 return 1 58 } 59 trap 'rm -f "$tmp"; exit 1' HUP INT QUIT PIPE TERM 60 61 # Do the actual work, producing a file "$tmp" 62 if uncompress -f -c < "$filez" | gzip -f $gzipflags > "$tmp"; then 63 64 if test $kflag -eq 1 && smaller "$filez" "$tmp"; then 65 echo -n "$prog: $filez is smaller than $filegz" 66 echo "; keeping it" 67 rm -f "$tmp" 68 return 0 69 fi 70 if ! checkfile "$tmp"; then 71 echo "$prog: integrity check of $tmp failed" 72 rm -f "$tmp" 73 return 1; 74 fi 75 76 # Try to keep the mode of the original file 77 if ! cp -fp "$filez" "$filegz"; then 78 echo "$prog: warning: could not keep mode of $filez" 79 fi 80 if ! cp "$tmp" "$filegz" 2> /dev/null; then 81 echo "$prog: warning: could not keep mode of $filez" 82 if ! cp -f "$tmp" "$filegz" 2> /dev/null; then 83 echo "$prog: could not copy $tmp to $filegz" 84 rm -f "$filegz" "$tmp" 85 return 1 86 fi 87 fi 88 if ! touch -fr "$filez" "$filegz"; then 89 echo -n "$prog: warning: could not keep timestamp of " 90 echo "$filez" 91 fi 92 rm -f "$filez" "$tmp" 93 else 94 echo "$prog: failed to process $filez" 95 rm -f "$tmp" 96 return 1 97 fi 98} 99 100prog=`basename "$0"` 101usage="usage: $prog [-9fKtv] file ..." 102 103fflag=0 104tflag=0 105kflag=0 106gzipflags= 107 108# -P flag is recognized to maintain compatibility, but ignored. Pipe mode is 109# always used 110while getopts :ftv9PK i; do 111 case $i in 112 f) fflag=1;; 113 t) tflag=1;; 114 v) gzipflags="-v $gzipflags";; 115 9) gzipflags="-9 $gzipflags";; 116 P) ;; 117 K) kflag=1;; 118 \?) echo "$usage"; exit 1;; 119 esac 120done 121 122shift OPTIND-1 123 124if test $# -eq 0; then 125 echo "$usage" 126 exit 1 127fi 128 129rc=0 130 131while test $# -ne 0; do 132 if ! process "$1"; then 133 rc=$? 134 fi 135 shift 136done 137exit $rc 138