From 6ef68d0c8356bf041fe65ca6d27c27a26f9d3a48 Mon Sep 17 00:00:00 2001
From: Mike Frysinger <vapier@gentoo.org>
Date: Sun, 3 Apr 2016 23:33:46 -0400
Subject: [PATCH] gentoo-sync: use namespaces

---
 .bin/gentoo-sync | 22 +++++++++++++++++++++-
 1 file changed, 21 insertions(+), 1 deletion(-)

diff --git a/.bin/gentoo-sync b/.bin/gentoo-sync
index 11bd717..ed2c071 100755
--- a/.bin/gentoo-sync
+++ b/.bin/gentoo-sync
@@ -10,6 +10,27 @@ GS_DEBUG=false
 conf="/etc/gentoo-sync.conf"
 [[ -e ${conf} ]] && . "${conf}"
 
+bootstrap() {
+	[[ $(id -u) -eq 0 ]] || exec sudo env -uUNSHARE HOME="$HOME" "$0" "$@"
+
+	if [[ -z ${UNSHARE} ]] ; then
+		mount_args=
+		if type -P unshare >&/dev/null ; then
+			test_arg() { unshare "$@" -- true >&/dev/null && uargs+=( "$@" ) || :; }
+			uargs=( -m )
+			test_arg -u
+			test_arg -i
+			test_arg -p -f --mount-proc
+			test_arg --propagation=private
+			UNSHARE=true exec unshare "${uargs[@]}" -- "$0" "$@"
+		fi
+	else
+		mount_args='-n'
+	fi
+	unset UNSHARE
+}
+bootstrap "$@"
+
 usage() {
 	cat <<-EOF
 	Usage: ${0##*/} [options]
@@ -58,7 +79,6 @@ for x ; do
 	esac
 done
 
-[ "${FLOCKER}" != "$0" ] && exec env FLOCKER="$0" flock -en "$0" "$0" "$@" || :
 ${GS_DEBUG} && set -x
 
 logdir="/var/log"
-- 
2.39.5