From e65c0f896a3938738e861325f39b87d6e1114442 Mon Sep 17 00:00:00 2001
From: Simon Hafner <hafnersimon@gmail.com>
Date: Thu, 22 Oct 2015 22:26:51 +0200
Subject: [PATCH] simpler way to check if systemd is the init system

According to
http://www.freedesktop.org/software/systemd/man/sd_booted.html
check if the directory /run/systemd/system/ exists.
---
 system/service.py | 17 +----------------
 1 file changed, 1 insertion(+), 16 deletions(-)

diff --git a/system/service.py b/system/service.py
index f9a8b1e24c1..227d34c1463 100644
--- a/system/service.py
+++ b/system/service.py
@@ -403,22 +403,7 @@ class LinuxService(Service):
                 self.svc_initscript = initscript
 
         def check_systemd():
-            # verify systemd is installed (by finding systemctl)
-            if not location.get('systemctl', False):
-                return False
-
-            # Check if init is the systemd command, using comm as cmdline could be symlink
-            try:
-                f = open('/proc/1/comm', 'r')
-            except IOError, err:
-                # If comm doesn't exist, old kernel, no systemd
-                return False
-
-            for line in f:
-                if 'systemd' in line:
-                    return True
-
-            return False
+            return os.path.exists("/run/systemd/system/")
 
         # Locate a tool to enable/disable a service
         if location.get('systemctl',False) and check_systemd():