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etc/alternatives/lzegrep

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+#!/bin/sh
+
+# xzgrep -- a wrapper around a grep program that decompresses files as needed
+# Adapted from a version sent by Charles Levert <charles@comm.polymtl.ca>
+
+# Copyright (C) 1998, 2001, 2002, 2006, 2007 Free Software Foundation
+# Copyright (C) 1993 Jean-loup Gailly
+
+# Modified for XZ Utils by Andrew Dudman and Lasse Collin.
+
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2 of the License, or
+# (at your option) any later version.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+
+#SET_PATH - This line is a placeholder to ease patching this script.
+
+# Instead of unsetting XZ_OPT, just make sure that xz will use file format
+# autodetection. This way memory usage limit and thread limit can be
+# specified via XZ_OPT. With gzip, bzip2, and lzop it's OK to just unset the
+# environment variables.
+xz='xz --format=auto'
+unset GZIP BZIP BZIP2 LZOP
+
+case ${0##*/} in
+  *egrep*) prog=xzegrep; grep=${GREP:-egrep};;
+  *fgrep*) prog=xzfgrep; grep=${GREP:-fgrep};;
+  *)       prog=xzgrep; grep=${GREP:-grep};;
+esac
+
+version="$prog (XZ Utils) 5.2.4"
+
+usage="Usage: ${0##*/} [OPTION]... [-e] PATTERN [FILE]...
+Look for instances of PATTERN in the input FILEs, using their
+uncompressed contents if they are compressed.
+
+OPTIONs are the same as for '$grep'.
+
+Report bugs to <lasse.collin@tukaani.org>."
+
+# sed script to escape all ' for the shell, and then (to handle trailing
+# newlines correctly) turn trailing X on last line into '.
+escape='
+  s/'\''/'\''\\'\'''\''/g
+  $s/X$/'\''/
+'
+operands=
+have_pat=0
+files_with_matches=0
+files_without_matches=0
+no_filename=0
+with_filename=0
+
+while test $# -ne 0; do
+  option=$1
+  shift
+  optarg=
+
+  case $option in
+  (-[0123456789abcdhHiIKLlnoqrRsTuUvVwxyzZ]?*)
+    arg2=-\'$(expr "X${option}X" : 'X-.[0-9]*\(.*\)' | sed "$escape")
+    eval "set -- $arg2 "'${1+"$@"}'
+    option=$(expr "X$option" : 'X\(-.[0-9]*\)');;
+  (--binary-*=* | --[lm]a*=* | --reg*=*)
+    ;;
+  (-[ABCDefm] | --binary-* | --file | --[lm]a* | --reg*)
+    case ${1?"$option option requires an argument"} in
+    (*\'*)
+      optarg=" '"$(printf '%sX\n' "$1" | sed "$escape");;
+    (*)
+      optarg=" '$1'";;
+    esac
+    shift;;
+  (--)
+    break;;
+  (-?*)
+    ;;
+  (*)
+    case $option in
+    (*\'*)
+      operands="$operands '"$(printf '%sX\n' "$option" | sed "$escape");;
+    (*)
+      operands="$operands '$option'";;
+    esac
+    ${POSIXLY_CORRECT+break}
+    continue;;
+  esac
+
+  case $option in
+  (-[drRzZ] | --di* | --exc* | --inc* | --rec* | --nu*)
+    printf >&2 '%s: %s: Option not supported\n' "$0" "$option"
+    exit 2;;
+  (-[ef]* | --file | --file=* | --reg*)
+    have_pat=1;;
+  (--h | --he | --hel | --help)
+    echo "$usage" || exit 2
+    exit;;
+  (-H | --wi | --wit | --with | --with- | --with-f | --with-fi \
+  | --with-fil | --with-file | --with-filen | --with-filena | --with-filenam \
+  | --with-filename)
+    with_filename=1
+    continue;;
+  (-l | --files-with-*)
+    files_with_matches=1
+    continue;;
+  (-L | --files-witho*)
+    files_without_matches=1
+    continue;;
+  (-h | --no-f*)
+    no_filename=1;;
+  (-V | --v | --ve | --ver | --vers | --versi | --versio | --version)
+    echo "$version" || exit 2
+    exit;;
+  esac
+
+  case $option in
+  (*\'?*)
+    option=\'$(expr "X${option}X" : 'X\(.*\)' | sed "$escape");;
+  (*)
+    option="'$option'";;
+  esac
+
+  grep="$grep $option$optarg"
+done
+
+if test $files_with_matches -eq 1 || test $files_without_matches -eq 1; then
+  grep="$grep -q"
+fi
+
+eval "set -- $operands "'${1+"$@"}'
+
+if test $have_pat -eq 0; then
+  case ${1?"Missing pattern; try \`${0##*/} --help' for help"} in
+  (*\'*)
+    grep="$grep -- '"$(printf '%sX\n' "$1" | sed "$escape");;
+  (*)
+    grep="$grep -- '$1'";;
+  esac
+  shift
+fi
+
+if test $# -eq 0; then
+  set -- -
+fi
+
+exec 3>&1
+
+# res=1 means that no file matched yet
+res=1
+
+for i; do
+  case $i in
+    *[-.][zZ] | *_z | *[-.]gz | *.t[ag]z) uncompress="gzip -cdfq";;
+    *[-.]bz2 | *[-.]tbz | *.tbz2) uncompress="bzip2 -cdfq";;
+    *[-.]lzo | *[-.]tzo) uncompress="lzop -cdfq";;
+    *) uncompress="$xz -cdfq";;
+  esac
+  # Fail if xz or grep (or sed) fails.
+  xz_status=$(
+    exec 5>&1
+    ($uncompress -- "$i" 5>&-; echo $? >&5) 3>&- |
+    if test $files_with_matches -eq 1; then
+      eval "$grep" && { printf '%s\n' "$i" || exit 2; }
+    elif test $files_without_matches -eq 1; then
+      eval "$grep" || {
+        r=$?
+        if test $r -eq 1; then
+          printf '%s\n' "$i" || r=2
+        fi
+        exit $r
+      }
+    elif test $with_filename -eq 0 &&
+         { test $# -eq 1 || test $no_filename -eq 1; }; then
+      eval "$grep"
+    else
+      # Append a colon so that the last character will never be a newline
+      # which would otherwise get lost in shell command substitution.
+      i="$i:"
+
+      # Escape & \ | and newlines only if such characters are present
+      # (speed optimization).
+      case $i in
+      (*'
+'* | *'&'* | *'\'* | *'|'*)
+        i=$(printf '%s\n' "$i" | LC_ALL=C sed 's/[&\|]/\\&/g; $!s/$/\\/');;
+      esac
+
+      # $i already ends with a colon so don't add it here.
+      sed_script="s|^|$i|"
+
+      # Fail if grep or sed fails.
+      r=$(
+        exec 4>&1
+        (eval "$grep" 4>&-; echo $? >&4) 3>&- |
+            LC_ALL=C sed "$sed_script" >&3 4>&-
+      ) || r=2
+      exit $r
+    fi >&3 5>&-
+  )
+  r=$?
+
+  # fail occured previously, nothing worse can happen
+  test $res -gt 1 && continue
+
+  test "$xz_status" -eq 0 || test "$xz_status" -eq 2 \
+      || test "$(kill -l "$xz_status" 2> /dev/null)" = "PIPE" || r=2
+
+  # still no match
+  test $r -eq 1 && continue
+
+  # 0 == match, >=2 == fail
+  res=$r
+done
+exit $res