mctpd: Add meson build option to disable bus owner mode

Currently, mctpd defaults to run as a bus owner, so ctx->bus_owner is
always true. This commit adds is-bus-owner build option to meson config
so we can disable this mode without editing the source code.

Signed-off-by: Khang Nguyen <[email protected]>

Author: Khang Nguyen

meson.build

@@ -20,6 +20,10 @@ conf.set10('HAVE_LINUX_MCTP_H',
     cc.has_header('linux/mctp.h'),
     description: 'Is linux/mctp.h available?'
 )
+conf.set10('IS_BUS_OWNER',
+    get_option('is-bus-owner'),
+    description: 'Whether we are running as the bus owner'
+)
 
 config_h = configure_file(
     output: 'config.h',

meson_options.txt

@@ -0,0 +1,6 @@
+option(
+	'is-bus-owner',
+	type: 'boolean',
+	value: true,
+	description: '''Whether we are running as the bus owner'''
+)

src/mctpd.c

@@ -6,6 +6,7 @@
  * Copyright (c) 2021 Google
  */
 
+#include "config.h"
 #define _GNU_SOURCE
 
 #include <sys/socket.h>
@@ -3149,8 +3150,8 @@ static int fill_uuid(ctx *ctx)
 static int setup_config(ctx *ctx)
 {
 	int rc;
-	// TODO: this will go in a config file or arguments.
-	ctx->bus_owner = true;
+	// configure this using meson build option
+	ctx->bus_owner = IS_BUS_OWNER;
 	rc = fill_uuid(ctx);
 	if (rc < 0)
 		return rc;