1#!@POSIX_SHELL@ 2 3# xzgrep -- a wrapper around a grep program that decompresses files as needed 4# Adapted from a version sent by Charles Levert <charles@comm.polymtl.ca> 5 6# Copyright (C) 1998, 2001, 2002, 2006, 2007 Free Software Foundation 7# Copyright (C) 1993 Jean-loup Gailly 8 9# Modified for XZ Utils by Andrew Dudman and Lasse Collin. 10 11# This program is free software; you can redistribute it and/or modify 12# it under the terms of the GNU General Public License as published by 13# the Free Software Foundation; either version 2 of the License, or 14# (at your option) any later version. 15 16# This program is distributed in the hope that it will be useful, 17# but WITHOUT ANY WARRANTY; without even the implied warranty of 18# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 19# GNU General Public License for more details. 20 21#SET_PATH - This line is a placeholder to ease patching this script. 22 23# Instead of unsetting XZ_OPT, just make sure that xz will use file format 24# autodetection. This way memory usage limit and thread limit can be 25# specified via XZ_OPT. With gzip and bzip2 it's OK to just unset the 26# environment variables. 27xz='@xz@ --format=auto' 28unset GZIP BZIP BZIP2 29 30case ${0##*/} in 31 *egrep*) prog=xzegrep; grep=${GREP:-egrep};; 32 *fgrep*) prog=xzfgrep; grep=${GREP:-fgrep};; 33 *) prog=xzgrep; grep=${GREP:-grep};; 34esac 35 36version="$prog (@PACKAGE_NAME@) @VERSION@" 37 38usage="Usage: ${0##*/} [OPTION]... [-e] PATTERN [FILE]... 39Look for instances of PATTERN in the input FILEs, using their 40uncompressed contents if they are compressed. 41 42OPTIONs are the same as for '$grep'. 43 44Report bugs to <@PACKAGE_BUGREPORT@>." 45 46# sed script to escape all ' for the shell, and then (to handle trailing 47# newlines correctly) turn trailing X on last line into '. 48escape=' 49 s/'\''/'\''\\'\'''\''/g 50 $s/X$/'\''/ 51' 52operands= 53have_pat=0 54files_with_matches=0 55files_without_matches=0 56no_filename=0 57with_filename=0 58 59while test $# -ne 0; do 60 option=$1 61 shift 62 optarg= 63 64 case $option in 65 (-[0123456789abcdhHiIKLlnoqrRsTuUvVwxyzZ]?*) 66 arg2=-\'$(expr "X${option}X" : 'X-.[0-9]*\(.*\)' | sed "$escape") 67 eval "set -- $arg2 "'${1+"$@"}' 68 option=$(expr "X$option" : 'X\(-.[0-9]*\)');; 69 (--binary-*=* | --[lm]a*=* | --reg*=*) 70 ;; 71 (-[ABCDefm] | --binary-* | --file | --[lm]a* | --reg*) 72 case ${1?"$option option requires an argument"} in 73 (*\'*) 74 optarg=" '"$(printf '%sX\n' "$1" | sed "$escape");; 75 (*) 76 optarg=" '$1'";; 77 esac 78 shift;; 79 (--) 80 break;; 81 (-?*) 82 ;; 83 (*) 84 case $option in 85 (*\'*) 86 operands="$operands '"$(printf '%sX\n' "$option" | sed "$escape");; 87 (*) 88 operands="$operands '$option'";; 89 esac 90 ${POSIXLY_CORRECT+break} 91 continue;; 92 esac 93 94 case $option in 95 (-[drRzZ] | --di* | --exc* | --inc* | --rec* | --nu*) 96 printf >&2 '%s: %s: Option not supported\n' "$0" "$option" 97 exit 2;; 98 (-[ef]* | --file | --file=* | --reg*) 99 have_pat=1;; 100 (--h | --he | --hel | --help) 101 echo "$usage" || exit 2 102 exit;; 103 (-H | --wi | --wit | --with | --with- | --with-f | --with-fi \ 104 | --with-fil | --with-file | --with-filen | --with-filena | --with-filenam \ 105 | --with-filename) 106 with_filename=1 107 continue;; 108 (-l | --files-with-*) 109 files_with_matches=1;; 110 (-L | --files-witho*) 111 files_without_matches=1;; 112 (-h | --no-f*) 113 no_filename=1;; 114 (-V | --v | --ve | --ver | --vers | --versi | --versio | --version) 115 echo "$version" || exit 2 116 exit;; 117 esac 118 119 case $option in 120 (*\'?*) 121 option=\'$(expr "X${option}X" : 'X\(.*\)' | sed "$escape");; 122 (*) 123 option="'$option'";; 124 esac 125 126 grep="$grep $option$optarg" 127done 128 129if test $files_with_matches -eq 1 || test $files_without_matches -eq 1; then 130 grep="$grep -q" 131fi 132 133eval "set -- $operands "'${1+"$@"}' 134 135if test $have_pat -eq 0; then 136 case ${1?"Missing pattern; try \`${0##*/} --help' for help"} in 137 (*\'*) 138 grep="$grep -- '"$(printf '%sX\n' "$1" | sed "$escape");; 139 (*) 140 grep="$grep -- '$1'";; 141 esac 142 shift 143fi 144 145if test $# -eq 0; then 146 set -- - 147fi 148 149exec 3>&1 150 151# res=1 means that no file matched yet 152res=1 153 154for i; do 155 case $i in 156 *[-.][zZ] | *_z | *[-.]gz | *.t[ag]z) uncompress="gzip -cdfq";; 157 *[-.]bz2 | *[-.]tbz | *.tbz2) uncompress="bzip2 -cdfq";; 158 *) uncompress="$xz -cdfq";; 159 esac 160 # Fail if xz or grep (or sed) fails. 161 xz_status=$( 162 exec 5>&1 163 ($uncompress -- "$i" 5>&-; echo $? >&5) 3>&- | 164 if test $files_with_matches -eq 1; then 165 eval "$grep" && { printf '%s\n' "$i" || exit 2; } 166 elif test $files_without_matches -eq 1; then 167 eval "$grep" || { 168 r=$? 169 if test $r -eq 1; then 170 printf '%s\n' "$i" || r=2 171 fi 172 exit $r 173 } 174 elif test $with_filename -eq 0 && 175 { test $# -eq 1 || test $no_filename -eq 1; }; then 176 eval "$grep" 177 else 178 case $i in 179 (*' 180'* | *'&'* | *'\'* | *'|'*) 181 i=$(printf '%s\n' "$i" | 182 sed ' 183 $!N 184 $s/[&\|]/\\&/g 185 $s/\n/\\n/g 186 ');; 187 esac 188 sed_script="s|^|$i:|" 189 190 # Fail if grep or sed fails. 191 r=$( 192 exec 4>&1 193 (eval "$grep" 4>&-; echo $? >&4) 3>&- | sed "$sed_script" >&3 4>&- 194 ) || r=2 195 exit $r 196 fi >&3 5>&- 197 ) 198 r=$? 199 200 # fail occured previously, nothing worse can happen 201 test $res -gt 1 && continue 202 203 test "$xz_status" -eq 0 || test "$xz_status" -eq 2 \ 204 || test "$(kill -l "$xz_status" 2> /dev/null)" = "PIPE" || r=2 205 206 # still no match 207 test $r -eq 1 && continue 208 209 # 0 == match, >=2 == fail 210 res=$r 211done 212exit $res 213