From 7f47430907b92bf277f3fabb6b4cb569b50ac503 Mon Sep 17 00:00:00 2001
From: Mike Frysinger <vapier@gentoo.org>
Date: Wed, 19 Oct 2016 22:20:23 -0400
Subject: [PATCH 1/1] custom-chroot: mount /dev/pts as newinstance manually

---
 .bin/custom-chroot | 14 ++++++++++++--
 1 file changed, 12 insertions(+), 2 deletions(-)

diff --git a/.bin/custom-chroot b/.bin/custom-chroot
index 67da2ea..e76d525 100755
--- a/.bin/custom-chroot
+++ b/.bin/custom-chroot
@@ -20,13 +20,18 @@ bootstrap() {
 	unset UNSHARE
 }
 
+is_mounted() {
+	local dst=$1
+	grep -sq "${dst}" /proc/mounts
+}
+
 maybe_mount() {
 	local src=/$1 dst=${chroot}/${2:-$1}
 	[[ -d ${src} ]] || return 0
 	if ! mkdir -p "${dst}" ; then
 		[[ -w ${chroot} ]] && exit 1 || return 0
 	fi
-	grep -sq "${dst}" /proc/mounts || mount ${mount_args} --bind "${src}" "${dst}"
+	is_mounted "${dst}" || mount ${mount_args} --bind "${src}" "${dst}"
 }
 
 get_type() {
@@ -108,7 +113,7 @@ usage() {
 main() {
 	bootstrap "$@"
 
-	local mounts=( proc sys tmp dev dev/pts dev/shm run usr/portage usr/portage/distfiles usr/local/src )
+	local mounts=( proc sys tmp dev dev/shm run usr/portage usr/portage/distfiles usr/local/src )
 
 	local chroot=${0%/*}
 	case ${chroot} in
@@ -138,6 +143,11 @@ main() {
 	for m in "${mounts[@]}" ; do
 		maybe_mount ${m}
 	done
+	# Handle special mounts that we don't want to just bind mount.
+	if ! is_mounted "${chroot}/dev/pts" ; then
+		mount -t devpts devpts "${chroot}/dev/pts" \
+			-o nosuid,noexec,newinstance,ptmxmode=0666,mode=0620,gid=5
+	fi
 
 	init_chroot
 
-- 
2.39.2