dist/bzip2/bzgrep

   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=$?
  65   else
  66     j=${i//\\/\\\\}
  67     j=${j//|/\\|}
  68     j=${j//&/\\&}
  69     j=`printf "%s" "$j" | tr '\n' ' '`
  70     bzip2 -cdfq "$i" | $grep $opt "$pat" | sed "s|^|${j}:|"
  71     r=$?
  72   fi
  73   test "$r" -ne 0 && res="$r"
  74 done
  75 exit $res