Spawning a frontend

include/kiwmi/frontend.h

@@ -0,0 +1,19 @@
+/* Copyright (c), Niclas Meyer <niclas@countingsort.com>
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at https://mozilla.org/MPL/2.0/.
+ */
+
+#ifndef KIWMI_FRONTEND_H
+#define KIWMI_FRONTEND_H
+
+#include <stdbool.h>
+
+struct kiwmi_frontend {
+    const char *frontend_path;
+};
+
+bool frontend_init(struct kiwmi_frontend *frontend, const char *frontend_path);
+
+#endif /* KIWMI_FRONTEND_H */

include/kiwmi/server.h

@@ -8,7 +8,10 @@
 #ifndef KIWMI_SERVER_H
 #define KIWMI_SERVER_H
 
+#include <stdbool.h>
+
 #include "kiwmi/desktop/desktop.h"
+#include "kiwmi/frontend.h"
 #include "kiwmi/input/input.h"
 
 struct kiwmi_server {
@@ -17,9 +20,10 @@ struct kiwmi_server {
     const char *socket;
     struct kiwmi_desktop desktop;
     struct kiwmi_input input;
+    struct kiwmi_frontend frontend;
 };
 
-bool server_init(struct kiwmi_server *server);
+bool server_init(struct kiwmi_server *server, const char *frontend_path);
 bool server_run(struct kiwmi_server *server);
 void server_fini(struct kiwmi_server *server);
 

kiwmi/frontend.c

@@ -0,0 +1,47 @@
+/* Copyright (c), Niclas Meyer <niclas@countingsort.com>
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at https://mozilla.org/MPL/2.0/.
+ */
+
+#include "kiwmi/frontend.h"
+
+#include <stdlib.h>
+#include <string.h>
+
+#include <unistd.h>
+
+#include <wlr/util/log.h>
+
+static bool
+spawn_frontend(const char *path)
+{
+    pid_t pid = fork();
+
+    if (pid < 0) {
+        wlr_log(WLR_ERROR, "Failed to start frontend (fork)");
+        return false;
+    }
+
+    if (pid == 0) {
+        execlp(path, path, NULL);
+        wlr_log(WLR_ERROR, "Failed to start frontend (exec), continuing");
+        _exit(EXIT_FAILURE);
+    }
+
+    return true;
+}
+
+bool
+frontend_init(struct kiwmi_frontend *frontend, const char *frontend_path)
+{
+    frontend->frontend_path = frontend_path;
+
+    if (strcmp(frontend_path, "NONE") == 0) {
+        wlr_log(WLR_ERROR, "Launching without a frontend");
+        return true;
+    } else {
+        return spawn_frontend(frontend_path);
+    }
+}

kiwmi/main.c

@@ -72,7 +72,7 @@ main(int argc, char **argv)
 
     struct kiwmi_server server;
 
-    if (!server_init(&server)) {
+    if (!server_init(&server, frontend_path)) {
         wlr_log(WLR_ERROR, "Failed to initialize server");
         exit(EXIT_FAILURE);
     }

kiwmi/meson.build

@@ -1,5 +1,6 @@
 kiwmi_sources = files(
   'main.c',
+  'frontend.c',
   'server.c',
   'desktop/desktop.c',
   'desktop/output.c',

kiwmi/server.c

@@ -15,7 +15,7 @@
 #include <wlr/util/log.h>
 
 bool
-server_init(struct kiwmi_server *server)
+server_init(struct kiwmi_server *server, const char *frontend_path)
 {
     wlr_log(WLR_DEBUG, "Initializing Wayland server");
 
@@ -42,6 +42,12 @@ server_init(struct kiwmi_server *server)
         return false;
     }
 
+    if (!frontend_init(&server->frontend, frontend_path)) {
+        wlr_log(WLR_ERROR, "Failed to initialize frontend");
+        wl_display_destroy(server->wl_display);
+        return false;
+    }
+
     return true;
 }