From e9b6b3123deca092779dd30dce17579d28a7f5b9 Mon Sep 17 00:00:00 2001
From: Erik Arvstedt <erik.arvstedt@gmail.com>
Date: Sat, 21 Jan 2023 13:14:27 +0100
Subject: [PATCH] dev/dev-features: add `enter_service` helper

---
 dev/dev-features.sh | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/dev/dev-features.sh b/dev/dev-features.sh
index 8eba0e8..b06ce4f 100644
--- a/dev/dev-features.sh
+++ b/dev/dev-features.sh
@@ -53,6 +53,15 @@ ls -al /var/lib/nixos-containers/nb-test
 # The container root filesystem on NixOS systems with stateVersion < 22.05
 ls -al /var/lib/containers/nb-test
 
+# Start a shell in the context of a service process.
+# Must be run inside the container (enter with cmd `c`).
+enter_service() {
+    local name=$1
+    nsenter --all -t "$(systemctl show -p MainPID --value "$name")" \
+      --setuid "$(id -u "$name")" --setgid "$(id -g "$name")" bash
+}
+enter_service clightning
+
 #―――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――
 # bitcoind
 run-tests.sh -s bitcoind container