From 9760dfc501d300b06043584328d450c86ac3a720 Mon Sep 17 00:00:00 2001
From: Bruce Leidl <bruce@subgraph.com>
Date: Mon, 4 Oct 2021 06:22:33 -0400
Subject: [PATCH] Added pid_namespace() method to Realm

---
 libcitadel/src/realm/realm.rs | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/libcitadel/src/realm/realm.rs b/libcitadel/src/realm/realm.rs
index aa25b27..d41797d 100644
--- a/libcitadel/src/realm/realm.rs
+++ b/libcitadel/src/realm/realm.rs
@@ -389,6 +389,11 @@ impl Realm {
         self.leader_pid().map(|pid| PathBuf::from(format!("/proc/{}/root", pid)))
     }
 
+    pub fn pid_namespace(&self) -> Option<String> {
+        let pid = self.leader_pid()?;
+        let path = symlink::read(format!("/proc/{}/ns/pid", pid))?;
+        path.to_str().map(|s| s.to_owned())
+    }
 
     /// Query for 'leader pid' of realm nspawn instance with machinectl.
     /// The leader pid is the 'pid 1' of the realm container as seen from