From 67979d49c7c3d99c95b99994015150c92ce2d21d Mon Sep 17 00:00:00 2001
From: Benda Xu <heroxbd@gentoo.org>
Date: Mon, 9 Sep 2013 14:43:02 -0700
Subject: [PATCH] unprivileged/chown: fix bug #470992

---
 bin/ebuild-helpers/unprivileged/chown | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/bin/ebuild-helpers/unprivileged/chown b/bin/ebuild-helpers/unprivileged/chown
index cad34d947..08fa650c5 100755
--- a/bin/ebuild-helpers/unprivileged/chown
+++ b/bin/ebuild-helpers/unprivileged/chown
@@ -1,5 +1,5 @@
 #!/bin/bash
-# Copyright 2012 Gentoo Foundation
+# Copyright 2012-2013 Gentoo Foundation
 # Distributed under the terms of the GNU General Public License v2
 
 scriptpath=${BASH_SOURCE[0]}
@@ -13,6 +13,14 @@ for path in ${PATH}; do
 	IFS=$' \t\n'
 	output=$("${path}/${scriptname}" "$@" 2>&1)
 	if [[ $? -ne 0 ]] ; then
+
+		# Avoid an extreme performance problem when the
+		# output is very long (bug #470992).
+		if [[ $(wc -l <<< "${output}") -gt 100 ]]; then
+			output=$(head -n100 <<< "${output}")
+			output="${output}\n ... (further messages truncated)"
+		fi
+
 		source "${PORTAGE_BIN_PATH:-/usr/lib/portage/bin}"/isolated-functions.sh
 
 		if ! ___eapi_has_prefix_variables; then
-- 
2.26.2