prevent going through systemd/upstart code, except on Linux

Fixes #809 (build issue on MacOSX)

NB: in case one day upstart is used on non-Linux platforms, this could
be relaxed to only skip systemd.

diff --git a/src/daemon/collectd.c b/src/daemon/collectd.c
index 309af1b..1b9c374 100644 (file)
--- a/src/daemon/collectd.c
+++ b/src/daemon/collectd.c
@@ -414,6 +414,7 @@ static int pidfile_remove (void)
 } /* static int pidfile_remove (const char *file) */
 #endif /* COLLECT_DAEMON */
 
+#ifdef KERNEL_LINUX
 int notify_upstart (void)
 {
     const char  *upstart_job = getenv("UPSTART_JOB");
@@ -479,6 +480,7 @@ int notify_systemd (void)
     close(fd);
     return 1;
 }
+#endif /* KERNEL_LINUX */
 
 int main (int argc, char **argv)
 {
@@ -598,9 +600,13 @@ int main (int argc, char **argv)
 
     /*
      * Only daemonize if we're not being supervised
-     * by upstart or systemd.
+     * by upstart or systemd (when using Linux).
      */
-       if (daemonize && notify_upstart() == 0 && notify_systemd() == 0)
+       if (daemonize
+#ifdef KERNEL_LINUX
+           && notify_upstart() == 0 && notify_systemd() == 0
+#endif
+       )
        {
                if ((pid = fork ()) == -1)
                {