From a67bb493af0c6e25cedcee1440a6904f9e80566e Mon Sep 17 00:00:00 2001
From: ading2210 <71154407+ading2210@users.noreply.github.com>
Date: Fri, 3 May 2024 17:10:55 +0000
Subject: [PATCH] remount without nodev/noexec, fixes #16

---
 build_rootfs.sh | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/build_rootfs.sh b/build_rootfs.sh
index 9a05f6d..84af9f2 100755
--- a/build_rootfs.sh
+++ b/build_rootfs.sh
@@ -40,6 +40,22 @@ unmount_all() {
   done
 }
 
+need_remount() {
+  local target="$1"
+  local mnt_options="$(findmnt -T "$target" | tail -n1 | rev | cut -f1 -d' '| rev)"
+  echo "$mnt_options" | grep -e "noexec" -e "nodev"
+}
+
+do_remount() {
+  local target="$1"
+  local mountpoint="$(findmnt -T "$target" | tail -n1 | cut -f1 -d' ')"
+  mount -o remount,dev,exec "$mountpoint"
+}
+
+if [ "$(need_remount "$rootfs_dir")" ]; then
+  do_remount "$rootfs_dir"
+fi
+
 debootstrap --arch amd64 $release_name $rootfs_dir http://deb.debian.org/debian/
 cp -ar rootfs/* $rootfs_dir
 cp /etc/resolv.conf $rootfs_dir/etc/resolv.conf