The Android Open Source Project | cfb3b27 | 2009-03-03 19:29:20 -0800 | [diff] [blame] | 1 | #!/bin/sh |
| 2 | |
| 3 | # Bzgrep wrapped for bzip2, |
| 4 | # adapted from zgrep by Philippe Troin <phil@fifi.org> for Debian GNU/Linux. |
| 5 | ## zgrep notice: |
| 6 | ## zgrep -- a wrapper around a grep program that decompresses files as needed |
| 7 | ## Adapted from a version sent by Charles Levert <charles@comm.polymtl.ca> |
| 8 | |
| 9 | PATH="/usr/bin:$PATH"; export PATH |
| 10 | |
| 11 | prog=`echo $0 | sed 's|.*/||'` |
| 12 | case "$prog" in |
| 13 | *egrep) grep=${EGREP-egrep} ;; |
| 14 | *fgrep) grep=${FGREP-fgrep} ;; |
| 15 | *) grep=${GREP-grep} ;; |
| 16 | esac |
| 17 | pat="" |
| 18 | while test $# -ne 0; do |
| 19 | case "$1" in |
| 20 | -e | -f) opt="$opt $1"; shift; pat="$1" |
| 21 | if test "$grep" = grep; then # grep is buggy with -e on SVR4 |
| 22 | grep=egrep |
| 23 | fi;; |
| 24 | -A | -B) opt="$opt $1 $2"; shift;; |
| 25 | -*) opt="$opt $1";; |
| 26 | *) if test -z "$pat"; then |
| 27 | pat="$1" |
| 28 | else |
| 29 | break; |
| 30 | fi;; |
| 31 | esac |
| 32 | shift |
| 33 | done |
| 34 | |
| 35 | if test -z "$pat"; then |
| 36 | echo "grep through bzip2 files" |
| 37 | echo "usage: $prog [grep_options] pattern [files]" |
| 38 | exit 1 |
| 39 | fi |
| 40 | |
| 41 | list=0 |
| 42 | silent=0 |
| 43 | op=`echo "$opt" | sed -e 's/ //g' -e 's/-//g'` |
| 44 | case "$op" in |
| 45 | *l*) list=1 |
| 46 | esac |
| 47 | case "$op" in |
| 48 | *h*) silent=1 |
| 49 | esac |
| 50 | |
| 51 | if test $# -eq 0; then |
| 52 | bzip2 -cdfq | $grep $opt "$pat" |
| 53 | exit $? |
| 54 | fi |
| 55 | |
| 56 | res=0 |
| 57 | for i do |
| 58 | if test -f "$i"; then :; else if test -f "$i.bz2"; then i="$i.bz2"; fi; fi |
| 59 | if test $list -eq 1; then |
| 60 | bzip2 -cdfq "$i" | $grep $opt "$pat" 2>&1 > /dev/null && echo $i |
| 61 | r=$? |
| 62 | elif test $# -eq 1 -o $silent -eq 1; then |
| 63 | bzip2 -cdfq "$i" | $grep $opt "$pat" |
| 64 | r=$? |
| 65 | else |
Elliott Hughes | 8645cf6 | 2021-12-08 15:07:46 -0800 | [diff] [blame] | 66 | j=$(echo "$i" | sed 's/\\/&&/g;s/|/\\&/g;s/&/\\&/g') |
The Android Open Source Project | cfb3b27 | 2009-03-03 19:29:20 -0800 | [diff] [blame] | 67 | j=`printf "%s" "$j" | tr '\n' ' '` |
Elliott Hughes | 8645cf6 | 2021-12-08 15:07:46 -0800 | [diff] [blame] | 68 | # A trick adapted from |
| 69 | # https://groups.google.com/forum/#!original/comp.unix.shell/x1345iu10eg/Nn1n-1r1uU0J |
| 70 | # that has the same effect as the following bash code: |
| 71 | # bzip2 -cdfq "$i" | $grep $opt "$pat" | sed "s|^|${j}:|" |
| 72 | # r=${PIPESTATUS[1]} |
| 73 | exec 3>&1 |
| 74 | eval ` |
| 75 | exec 4>&1 >&3 3>&- |
| 76 | { |
| 77 | bzip2 -cdfq "$i" 4>&- |
| 78 | } | { |
| 79 | $grep $opt "$pat" 4>&-; echo "r=$?;" >&4 |
| 80 | } | sed "s|^|${j}:|" |
| 81 | ` |
The Android Open Source Project | cfb3b27 | 2009-03-03 19:29:20 -0800 | [diff] [blame] | 82 | fi |
| 83 | test "$r" -ne 0 && res="$r" |
| 84 | done |
| 85 | exit $res |