From dc3e71dcd34b649a22ff9094a8888f8a26b47091 Mon Sep 17 00:00:00 2001
From: Asger Hautop Drewsen <asger@princh.com>
Date: Tue, 19 Aug 2025 14:30:17 +0200
Subject: [PATCH] Add function to check if current process is running as a
 service

---
 src/service.rs | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/src/service.rs b/src/service.rs
index 3fe426d..d0729ba 100644
--- a/src/service.rs
+++ b/src/service.rs
@@ -1989,6 +1989,20 @@ fn escape_wide(s: impl AsRef<OsStr>) -> ::std::result::Result<WideString, Contai
     Ok(wide.to_ustring())
 }
 
+/// Returns whether this process is running as a service
+pub fn is_running_as_service() -> crate::Result<bool> {
+    let pid = std::process::id();
+
+    let mut session_id = 0u32;
+
+    let success = unsafe { RemoteDesktop::ProcessIdToSessionId(pid, &raw mut session_id) };
+    if success == 0 {
+        Err(Error::Winapi(io::Error::last_os_error()))
+    } else {
+        Ok(session_id == 0)
+    }
+}
+
 #[cfg(test)]
 mod tests {
     use super::*;