3 # zgrep -- a wrapper around a grep program that decompresses files as needed
4 # Adapted from a version sent by Charles Levert <charles@comm.polymtl.ca>
6 # Copyright (C) 1998, 2001, 2002, 2006, 2007 Free Software Foundation
7 # Copyright (C) 1993 Jean-loup Gailly
9 # This program is free software; you can redistribute it and/or modify
10 # it under the terms of the GNU General Public License as published by
11 # the Free Software Foundation; either version 2 of the License, or
12 # (at your option) any later version.
14 # This program is distributed in the hope that it will be useful,
15 # but WITHOUT ANY WARRANTY; without even the implied warranty of
16 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 # GNU General Public License for more details.
19 # You should have received a copy of the GNU General Public License along
20 # with this program; if not, write to the Free Software Foundation, Inc.,
21 # 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
23 PATH=${GZIP_BINDIR-'/bin'}:$PATH
26 version='z$grep (gzip) 1.3.12
27 Copyright (C) 2007 Free Software Foundation, Inc.
28 This is free software. You may redistribute copies of it under the terms of
29 the GNU General Public License <http://www.gnu.org/licenses/gpl.html>.
30 There is NO WARRANTY, to the extent permitted by law.
32 Written by Jean-loup Gailly.'
34 usage="Usage: $0 [OPTION]... [-e] PATTERN [FILE]...
35 Look for instances of PATTERN in the input FILEs, using their
36 uncompressed contents if they are compressed.
38 OPTIONs are the same as for 'grep'.
40 Report bugs to <bug-gzip@gnu.org>."
42 # sed script to escape all ' for the shell, and then (to handle trailing
43 # newlines correctly) turn trailing X on last line into '.
45 s/'\''/'\''\\'\'''\''/g
52 files_without_matches=0
56 while test $# -ne 0; do
62 (-[0123456789abcdhHiIKLlnoqrRsTuUvVwxyzZ]?*)
63 arg2=-\'$(expr "X${option}X" : 'X-.[0-9]*\(.*\)' | sed "$escape")
64 eval "set -- $arg2 "'${1+"$@"}'
65 option=$(expr "X$option" : 'X\(-.[0-9]*\)');;
66 (--binary-*=* | --[lm]a*=* | --reg*=*)
68 (-[ABCDefm] | --binary-* | --file | --[lm]a* | --reg*)
69 case ${1?"$option option requires an argument"} in
71 optarg=" '"$(printf '%sX\n' "$1" | sed "$escape");;
83 operands="$operands '"$(printf '%sX\n' "$option" | sed "$escape");;
85 operands="$operands '$option'";;
87 ${POSIXLY_CORRECT+break}
92 (-[drRzZ] | --di* | --exc* | --inc* | --rec* | --nu*)
93 printf >&2 '%s: %s: option not supported\n' "$0" "$option"
95 (-[ef]* | --file | --file=* | --reg*)
96 # The pattern is coming from a file rather than the command-line.
97 # If the file is actually stdin then we need to do a little
98 # magic, (since we use stdin to pass the gzip output to grep).
99 # So find a free fd and change the argument to then use this
100 # file descriptor for the pattern.
102 (" '-'" | " '/dev/stdin'" | " '/dev/fd/0'")
104 # Start search from 6 since the script already uses 3 and 5
105 for fd in $(seq 6 254); do
106 if test ! -e /dev/fd/$fd; then
111 optarg=/dev/fd/$pat_fd;
114 (--h | --he | --hel | --help)
115 echo "$usage" || exit 2
117 (-H | --wi | --wit | --with | --with- | --with-f | --with-fi \
118 | --with-fil | --with-file | --with-filen | --with-filena | --with-filenam \
122 (-l | --files-with-*)
123 files_with_matches=1;;
124 (-L | --files-witho*)
125 files_without_matches=1;;
128 (-V | --v | --ve | --ver | --vers | --versi | --versio | --version)
129 echo "$version" || exit 2
135 option=\'$(expr "X${option}X" : 'X\(.*\)' | sed "$escape");;
140 grep="$grep $option$optarg"
143 eval "set -- $operands "'${1+"$@"}'
145 if test $have_pat -eq 0; then
146 case ${1?"missing pattern; try \`$0 --help' for help"} in
148 grep="$grep -- '"$(printf '%sX\n' "$1" | sed "$escape");;
150 grep="$grep -- '$1'";;
155 if test $# -eq 0; then
164 # Fail if gzip or grep (or sed) fails.
167 if test $pat_on_stdin -eq 1; then
168 eval "exec $pat_fd<&0"
170 (gzip -cdfq -- "$i" 5>&-; echo $? >&5) 3>&- |
171 if test $files_with_matches -eq 1; then
172 eval "$grep" >/dev/null && { printf '%s\n' "$i" || exit 2; }
173 elif test $files_without_matches -eq 1; then
174 eval "$grep" >/dev/null || {
176 if test $r -eq 1; then
177 printf '%s\n' "$i" || r=2
181 elif test $with_filename -eq 0 &&
182 { test $# -eq 1 || test $no_filename -eq 1; }; then
187 '* | *'&'* | *'\'* | *'|'*)
188 i=$(printf '%s\n' "$i" |
195 sed_script="s|^|$i:|"
197 # Fail if grep or sed fails.
200 (eval "$grep" 4>&-; echo $? >&4) 3>&- | sed "$sed_script" >&3 4>&-
206 test "$gzip_status" -eq 0 || test "$gzip_status" -eq 2 || r=2
207 test $res -lt $r && res=$r