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, 2009-2016 Free Software Foundation,
9 # Copyright (C) 1993 Jean-loup Gailly
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 3 of the License, or
14 # (at your option) any later version.
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.
21 # You should have received a copy of the GNU General Public License along
22 # with this program; if not, write to the Free Software Foundation, Inc.,
23 # 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
25 grep='${GREP-'\''@GREP@'\''}'
27 version='zgrep (gzip) @VERSION@
28 Copyright (C) 2010-2016 Free Software Foundation, Inc.
29 This is free software. You may redistribute copies of it under the terms of
30 the GNU General Public License <http://www.gnu.org/licenses/gpl.html>.
31 There is NO WARRANTY, to the extent permitted by law.
33 Written by Jean-loup Gailly.'
35 usage="Usage: $0 [OPTION]... [-e] PATTERN [FILE]...
36 Look for instances of PATTERN in the input FILEs, using their
37 uncompressed contents if they are compressed.
39 OPTIONs are the same as for 'grep', except that the following 'grep'
40 options are not supported: --dereference-recursive (-R), --directories (-d),
41 --exclude, --exclude-from, --exclude-dir, --include, --null (-Z),
42 --null-data (-z), and --recursive (-r).
44 Report bugs to <bug-gzip@gnu.org>."
46 # sed script to escape all ' for the shell, and then (to handle trailing
47 # newlines correctly) append ' to the last line.
49 s/'\''/'\''\\'\'''\''/g
55 files_without_matches=0
59 while test $# -ne 0; do
65 (-[0123456789EFGHIKLPRTUVZabchilnoqrsuvwxyz]*[!0123456789]*)
66 arg2=-\'$(expr "X$option" : 'X-.[0-9]*\(.*\)' | sed "$escape")
67 eval "set -- $arg2 "'${1+"$@"}'
68 option=$(expr "X$option" : 'X\(-.[0-9]*\)');;
69 (--binary-*=* | --[lm]a*=* | --reg*=*)
71 (-[ABCDXdefm] | binary-* | --file | --[lm]a* | --reg*)
72 case ${1?"$option option requires an argument"} in
74 optarg=" '"$(printf '%s\n' "$1" | sed "$escape");;
80 optarg=" '"$(expr "X$option" : 'X-f\(.*\)' | sed "$escape")
83 optarg=" '"$(expr "X$option" : 'X-f\(.*\)')\'
86 optarg=" '"$(expr "X$option" : 'X--file=\(.*\)' | sed "$escape")
89 optarg=" '"$(expr "X$option" : 'X--file=\(.*\)')\'
98 operands="$operands '"$(printf '%s\n' "$option" | sed "$escape");;
100 operands="$operands '$option'";;
102 ${POSIXLY_CORRECT+break}
107 (-[drRzZ] | --di* | --exc* | --inc* | --rec* | --nu*)
108 printf >&2 '%s: %s: option not supported\n' "$0" "$option"
113 # The pattern is coming from a file rather than the command-line.
114 # If the file is actually stdin then we need to do a little
115 # magic, since we use stdin to pass the gzip output to grep.
116 # Turn the -f option into an -e option by copying the file's
117 # contents into OPTARG.
119 (" '-'" | " '/dev/stdin'" | " '/dev/fd/0'")
121 optarg=" '"$(sed "$escape") || exit 2;;
124 (--h | --he | --hel | --help)
125 echo "$usage" || exit 2
127 (-H | --wi | --wit | --with | --with- | --with-f | --with-fi \
128 | --with-fil | --with-file | --with-filen | --with-filena | --with-filenam \
132 (-l | --files-with-*)
133 files_with_matches=1;;
134 (-L | --files-witho*)
135 files_without_matches=1;;
138 (-V | --v | --ve | --ver | --vers | --versi | --versio | --version)
139 echo "$version" || exit 2
145 option=\'$(printf '%s\n' "$option" | sed "$escape");;
150 grep="$grep $option$optarg"
153 eval "set -- $operands "'${1+"$@"}'
155 if test $have_pat -eq 0; then
156 case ${1?"missing pattern; try \`$0 --help' for help"} in
158 grep="$grep -- '"$(printf '%s\n' "$1" | sed "$escape");;
160 grep="$grep -- '$1'";;
165 if test $# -eq 0; then
174 # Fail if gzip or grep (or sed) fails.
177 (gzip -cdfq -- "$i" 5>&-; echo $? >&5) 3>&- |
178 if test $files_with_matches -eq 1; then
179 eval "$grep" >/dev/null && { printf '%s\n' "$i" || exit 2; }
180 elif test $files_without_matches -eq 1; then
181 eval "$grep" >/dev/null || {
183 if test $r -eq 1; then
184 printf '%s\n' "$i" || r=2
186 test 256 -le $r && r=$(expr 128 + $r % 128)
189 elif test $with_filename -eq 0 &&
190 { test $# -eq 1 || test $no_filename -eq 1; }; then
195 '* | *'&'* | *'\'* | *'|'*)
196 i=$(printf '%s\n' "$i" |
203 sed_script="s|^|$i:|"
205 # Fail if grep or sed fails.
208 (eval "$grep" 4>&-; echo $? >&4) 3>&- | sed "$sed_script" >&3 4>&-
209 ) || { r=$?; test $r -lt 2 && r=2; }
210 test 256 -le $r && r=$(expr 128 + $r % 128)
216 # Ignore gzip status 2, as it is just a warning.
217 # gzip status 1 is an error, like grep status 2.
218 test $gzip_status -eq 2 && gzip_status=0
219 test $gzip_status -eq 1 && gzip_status=2
221 # Use the more serious of the grep and gzip statuses.
222 test $r -lt $gzip_status && r=$gzip_status
224 # Accumulate the greatest status, except consider 0 to be greater than 1.
225 if test $r -le 1 && test $res -le 1; then
231 # Exit immediately on a serious error.
232 test 126 -le $res && break
235 test 128 -le $res && kill -$(expr $res % 128) $$