1#!/bin/sh
2#
3#    zipgrep: Use unzip and egrep to search the specified members of a
4# Zip archive for a string or pattern.  Search all members if no members
5# are specified explicitly.  The script attempts to handle egrep's "-h"
6# and "-l" options internally.
7#
8# This script assumes that the desired "unzip" and "egrep" (and "sed")
9# programs are on the user's PATH.
10#
11
12pat=""
13opt=""
14while test $# -ne 0; do
15  case "$1" in
16  -e | -f) opt="$opt $1"; shift; pat="$1";;
17  -*)      opt="$opt $1";;
18   *)      if test -z "$pat"; then
19             pat="$1"
20           else
21             break;
22           fi;;
23  esac
24  shift
25done
26
27if test $# = 0; then
28  echo usage: `basename "$0"` "[egrep_options] pattern zipfile [members...]"
29  echo Uses unzip and egrep to search the zip members for a string or pattern.
30  exit 1
31fi
32zipfile="$1"; shift
33
34list=0
35silent=0
36opt=`echo "$opt" | sed -e 's/ //g' -e 's/-//g'`
37case "$opt" in
38  *l*) list=1; opt=`echo $opt | sed s/l//`
39esac
40case "$opt" in
41  *h*) silent=1
42esac
43if test -n "$opt"; then
44  opt="-$opt"
45fi
46
47status_grep_global=1
48IFS='
49'
50
51# Escape shell-special characters in "pat".
52pat=` echo "$pat" | \
53 sed -e 's/\\\\/\\\\\\\\/g' -e 's/|/\\\|/g' -e 's/&/\\\&/g' `
54
55# Use "unzip -Z1" to get a listing of the specified members from the
56# specified archive.  Escape any backslashes in a file name.
57for i in `unzip -Z1 "$zipfile" ${1+"$@"} | sed -e 's/\\\\/\\\\\\\\/g' `; do
58  if test $list -eq 1; then
59    # "-l": Show only the archive member name, not the matching line(s).
60    unzip -p-L "$zipfile" "$i" | \
61     egrep $opt "$pat" > /dev/null && echo "$i"
62    status_grep=$?
63  elif test $silent -eq 1; then
64    # "-h": Show only the matching line(s), not the archive member name.
65    # ("-s" in "opt" will silence "egrep", stopping all output.)
66    unzip -p-L "$zipfile" "$i" | \
67     egrep $opt "$pat"
68    status_grep=$?
69  else
70    # Escape (or re-escape) shell-special characters in the archive
71    # member name, "i".
72    i=` echo "$i" | \
73     sed -e 's/\\\\/\\\\\\\\/g' -e 's/|/\\\|/g' -e 's/&/\\\&/g' `
74
75    # Globally, send fd 4 to stdout.  In the pipeline, send normal
76    # stdout to fd 4, and send grep status to fd 3.  Collect fd 3
77    # with ``.
78    exec 4>&1
79    status_grep=` ( \
80     ( unzip -p-L "$zipfile" "$i" | \
81     egrep $opt "$pat" 1>&4 ; echo $? >&3 ) 4>&1 | \
82     sed "s|^|${i}:|" 1>&4 \
83     ) 3>&1 `
84  fi
85
86  # Save the primary command status.  (May be the grep status.)
87  sts=$?
88  # If this grep status was zero, set the global grep status to zero.
89  test "$status_grep" -eq 0 && status_grep_global=0
90  # If this grep status was not zero or one, exit now.
91  test "$status_grep" -gt 1 && exit "$status_grep"
92
93done
94
95# If "sts" is good (0), then exit with the global grep status.
96# Else, when "sts" is bad, exit with the worst status we can find.
97if test $sts -eq 0 ; then
98  exit $status_grep_global
99else
100  if test "$status_grep" -gt 1 ; then
101    exit "$status_grep"
102  else
103    exit $sts
104  fi
105fi
106