From 8e6e3d387a6f9f622f1d84c444924d61069f7af3 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Karel=20Ko=C4=8D=C3=AD?= <cynerd@email.cz>
Date: Wed, 25 Jan 2023 15:24:31 +0100
Subject: tools/install.sh: import unshare from nixos-enter

This even causes nixos-enter to use our unshare as we use the same
enviroment variable.
---
 tools/install.sh | 9 +++++++++
 1 file changed, 9 insertions(+)

(limited to 'tools/install.sh')

diff --git a/tools/install.sh b/tools/install.sh
index 254b93b..5a10830 100755
--- a/tools/install.sh
+++ b/tools/install.sh
@@ -13,6 +13,15 @@ if ! command -v git >/dev/null; then
 	exec nix shell 'nixpkgs#git' -c "$0" "$@"
 fi
 
+# This is copied over from nixos-enter and prevents usage of two unshares
+if [ -z "$NIXOS_ENTER_REEXEC" ]; then
+	export NIXOS_ENTER_REEXEC=1
+	exec unshare --fork --mount --uts --mount-proc --pid -- "$0" "$@"
+else
+	mount --make-rprivate /
+fi
+
+################################################################################
 if [ ! -s "$root/.personal-secrets.key" ]; then
 	echo "Please paste the personal secret key (terminate using ^D)" >&2
 	sudo tee "$root/.personal-secrets.key" >/dev/null
-- 
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