Automatically use systemd journal and run in foreground when under sy…

…stemd

Signed-off-by: Florian Schmaus <flo@geekplace.eu>

irqbalance.c

@@ -616,6 +616,16 @@ int main(int argc, char** argv)
 
 	parse_command_line(argc, argv);
 
+	/*
+	 * Check if we are run under systemd and enable journal_logging
+	 * and run in foreground if so. Systemd v232 or later will set
+	 * INVOCATION_ID.
+	 */
+	if (getenv("INVOCATION_ID")) {
+		journal_logging=1;
+		foreground_mode=1;
+	}
+
 	/*
  	 * Open the syslog connection
  	 */

misc/irqbalance.service

@@ -8,7 +8,7 @@ ConditionCPUs=>1
 [Service]
 EnvironmentFile=-/usr/lib/irqbalance/defaults.env
 EnvironmentFile=-/path/to/irqbalance.env
-ExecStart=/usr/sbin/irqbalance --foreground $IRQBALANCE_ARGS
+ExecStart=/usr/sbin/irqbalance $IRQBALANCE_ARGS
 ReadOnlyPaths=/
 ReadWritePaths=/proc/irq
 RestrictAddressFamilies=AF_UNIX AF_NETLINK