kc3-lang/bzip2/bzgrep

Branch : - branch - master - tag - bzip2-0.1 bzip2-0.1pl2 bzip2-0.9.0c bzip2-0.9.5d bzip2-1.0.1 bzip2-1.0.2 bzip2-1.0.3 bzip2-1.0.4 bzip2-1.0.5 bzip2-1.0.6 bzip2-1.0.7 bzip2-1.0.8

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  Commit

• Author : Mark Wielaard
  Date : 2019-07-12 01:06:33
  Hash : d0b47bde
  Message : Fix bzgrep so it doesn't always return a 0 exit code with multiple archives The bzgrep wrapper always returns 0 as exit code when working on multiple archives, even when the pattern is not found. Fix from openSUSE by Kristýna Streitová <kstreitova@suse.com> https://bugzilla.suse.com/970260

• bzgrep

• #!/bin/sh
  
  # Bzgrep wrapped for bzip2, 
  # adapted from zgrep by Philippe Troin <phil@fifi.org> for Debian GNU/Linux.
  ## zgrep notice:
  ## zgrep -- a wrapper around a grep program that decompresses files as needed
  ## Adapted from a version sent by Charles Levert <charles@comm.polymtl.ca>
  
  PATH="/usr/bin:$PATH"; export PATH
  
  prog=`echo $0 | sed 's|.*/||'`
  case "$prog" in
  	*egrep)	grep=${EGREP-egrep}	;;
  	*fgrep)	grep=${FGREP-fgrep}	;;
  	*)	grep=${GREP-grep}	;;
  esac
  pat=""
  while test $# -ne 0; do
    case "$1" in
    -e | -f) opt="$opt $1"; shift; pat="$1"
             if test "$grep" = grep; then  # grep is buggy with -e on SVR4
               grep=egrep
             fi;;
    -A | -B) opt="$opt $1 $2"; shift;;
    -*)	   opt="$opt $1";;
     *)      if test -z "$pat"; then
  	     pat="$1"
  	   else
  	     break;
             fi;;
    esac
    shift
  done
  
  if test -z "$pat"; then
    echo "grep through bzip2 files"
    echo "usage: $prog [grep_options] pattern [files]"
    exit 1
  fi
  
  list=0
  silent=0
  op=`echo "$opt" | sed -e 's/ //g' -e 's/-//g'`
  case "$op" in
    *l*) list=1
  esac
  case "$op" in
    *h*) silent=1
  esac
  
  if test $# -eq 0; then
    bzip2 -cdfq | $grep $opt "$pat"
    exit $?
  fi
  
  res=0
  for i do
    if test -f "$i"; then :; else if test -f "$i.bz2"; then i="$i.bz2"; fi; fi
    if test $list -eq 1; then
      bzip2 -cdfq "$i" | $grep $opt "$pat" 2>&1 > /dev/null && echo $i
      r=$?
    elif test $# -eq 1 -o $silent -eq 1; then
      bzip2 -cdfq "$i" | $grep $opt "$pat"
      r=$?
    else
      j=$(echo "$i" | sed 's/\\/&&/g;s/|/\\&/g;s/&/\\&/g')
      j=`printf "%s" "$j" | tr '\n' ' '`
      # A trick adapted from
      # https://groups.google.com/forum/#!original/comp.unix.shell/x1345iu10eg/Nn1n-1r1uU0J
      # that has the same effect as the following bash code:
      # bzip2 -cdfq "$i" | $grep $opt "$pat" | sed "s|^|${j}:|"
      # r=${PIPESTATUS[1]}
      exec 3>&1
      eval `
        exec 4>&1 >&3 3>&-
        {
          bzip2 -cdfq "$i" 4>&-
        } | {
          $grep $opt "$pat" 4>&-; echo "r=$?;" >&4
        } | sed "s|^|${j}:|"
      `
    fi
    test "$r" -ne 0 && res="$r"
  done
  exit $res