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7c673cae FG |
1 | #!/bin/sh |
2 | # | |
3 | # Copyright (c) 2003 Thomas Klausner. | |
4 | # | |
5 | # Redistribution and use in source and binary forms, with or without | |
6 | # modification, are permitted provided that the following conditions | |
7 | # are met: | |
8 | # 1. Redistributions of source code must retain the above copyright | |
9 | # notice, this list of conditions and the following disclaimer. | |
10 | # 2. Redistributions in binary form must reproduce the above copyright | |
11 | # notice, this list of conditions and the following disclaimer in the | |
12 | # documentation and/or other materials provided with the distribution. | |
13 | # | |
14 | # THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR | |
15 | # IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES | |
16 | # OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. | |
17 | # IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, | |
18 | # INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT | |
19 | # NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, | |
20 | # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | |
21 | # THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
22 | # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF | |
23 | # THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
24 | ||
9f95a23c TL |
25 | grep=${GREP:-grep} |
26 | zcat=${ZCAT:-zstdcat} | |
7c673cae FG |
27 | |
28 | endofopts=0 | |
29 | pattern_found=0 | |
30 | grep_args="" | |
31 | hyphen=0 | |
32 | silent=0 | |
33 | ||
9f95a23c | 34 | prog=${0##*/} |
7c673cae FG |
35 | |
36 | # handle being called 'zegrep' or 'zfgrep' | |
9f95a23c TL |
37 | case $prog in |
38 | *egrep*) prog=zegrep; grep_args='-E';; | |
39 | *fgrep*) prog=zfgrep; grep_args='-F';; | |
40 | *) prog=zstdgrep;; | |
7c673cae FG |
41 | esac |
42 | ||
43 | # skip all options and pass them on to grep taking care of options | |
44 | # with arguments, and if -e was supplied | |
45 | ||
9f95a23c TL |
46 | while [ "$#" -gt 0 ] && [ "${endofopts}" -eq 0 ]; do |
47 | case "$1" in | |
7c673cae | 48 | # from GNU grep-2.5.1 -- keep in sync! |
9f95a23c TL |
49 | -[ABCDXdefm]) |
50 | if [ "$#" -lt 2 ]; then | |
51 | printf '%s: missing argument for %s flag\n' "${prog}" "$1" >&2 | |
52 | exit 1 | |
53 | fi | |
54 | case "$1" in | |
55 | -e) | |
56 | pattern="$2" | |
57 | pattern_found=1 | |
58 | shift 2 | |
59 | break | |
60 | ;; | |
61 | *) | |
62 | ;; | |
63 | esac | |
64 | grep_args="${grep_args} $1 $2" | |
65 | shift 2 | |
66 | ;; | |
67 | --) | |
68 | shift | |
69 | endofopts=1 | |
70 | ;; | |
71 | -) | |
72 | hyphen=1 | |
73 | shift | |
74 | ;; | |
75 | -h) | |
76 | silent=1 | |
77 | shift | |
78 | ;; | |
79 | -*) | |
80 | grep_args="${grep_args} $1" | |
81 | shift | |
82 | ;; | |
83 | *) | |
84 | # pattern to grep for | |
85 | endofopts=1 | |
86 | ;; | |
7c673cae FG |
87 | esac |
88 | done | |
89 | ||
90 | # if no -e option was found, take next argument as grep-pattern | |
9f95a23c TL |
91 | if [ "${pattern_found}" -lt 1 ]; then |
92 | if [ "$#" -ge 1 ]; then | |
93 | pattern="$1" | |
94 | shift | |
95 | elif [ "${hyphen}" -gt 0 ]; then | |
96 | pattern="-" | |
7c673cae | 97 | else |
9f95a23c TL |
98 | printf '%s: missing pattern\n' "${prog}" >&2 |
99 | exit 1 | |
7c673cae FG |
100 | fi |
101 | fi | |
102 | ||
9f95a23c | 103 | EXIT_CODE=0 |
7c673cae | 104 | # call grep ... |
9f95a23c | 105 | if [ "$#" -lt 1 ]; then |
7c673cae | 106 | # ... on stdin |
9f95a23c TL |
107 | set -f # Disable file name generation (globbing). |
108 | # shellcheck disable=SC2086 | |
109 | "${zcat}" -fq - | "${grep}" ${grep_args} -- "${pattern}" - | |
110 | EXIT_CODE=$? | |
111 | set +f | |
7c673cae FG |
112 | else |
113 | # ... on all files given on the command line | |
9f95a23c TL |
114 | if [ "${silent}" -lt 1 ] && [ "$#" -gt 1 ]; then |
115 | grep_args="-H ${grep_args}" | |
7c673cae | 116 | fi |
9f95a23c TL |
117 | set -f |
118 | while [ "$#" -gt 0 ]; do | |
119 | # shellcheck disable=SC2086 | |
120 | "${zcat}" -fq -- "$1" | "${grep}" --label="${1}" ${grep_args} -- "${pattern}" - | |
121 | [ "$?" -ne 0 ] && EXIT_CODE=1 | |
122 | shift | |
7c673cae | 123 | done |
9f95a23c | 124 | set +f |
7c673cae FG |
125 | fi |
126 | ||
9f95a23c | 127 | exit "${EXIT_CODE}" |