Add bzip2 1.0.8

third_party/bzip2/bzgrep

@@ -0,0 +1,85 @@
+#!/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