From 21df56d546c43c600e339e6ad46a1cfbcfaa7f64 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Lauren=C8=9Biu=20Nicola?= <lnicola@dend.ro>
Date: Mon, 9 Mar 2026 12:50:50 +0200
Subject: [PATCH] Fix booted to work as expected when systemd is not running

---
 CHANGELOG.md |  2 ++
 src/lib.rs   | 13 ++++++++++---
 2 files changed, 12 insertions(+), 3 deletions(-)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index e1bbf1b..4d1c9a0 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -9,6 +9,8 @@
  - the MSRV is now defined as 1.82
 
  ### Fixed
+
+ - fixed `booted` to return `Ok(false)` when not running under systemd
  - fixed `watchdog_enabled` to handle missing `WATCHDOG_PID`
 
 ## [0.4.5] - 2025-01-18
diff --git a/src/lib.rs b/src/lib.rs
index ddc9fdc..03e0bd3 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -131,11 +131,18 @@ impl NotifyState<'_> {
 /// # Example
 ///
 /// ```no_run
-/// let _ = sd_notify::booted();
+/// match sd_notify::booted() {
+///     Ok(true) => { println!("System is booted under systemd")},
+///     Ok(false) => { println!("System is not booted under systemd")},
+///     Err(e) => { println!("Error: {}", e)},
+/// }
 /// ```
 pub fn booted() -> io::Result<bool> {
-    let m = fs::symlink_metadata("/run/systemd/system")?;
-    Ok(m.is_dir())
+    match fs::symlink_metadata("/run/systemd/system") {
+        Ok(m) => Ok(m.is_dir()),
+        Err(e) if matches!(e.kind(), ErrorKind::NotFound) => Ok(false),
+        Err(e) => Err(e),
+    }
 }
 
 // Constants for env variable names so that we don't typo them.