Added socket initialization

src/kiwmi/ipc.c

@@ -0,0 +1,52 @@
+/* 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 "ipc.h"
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include <sys/socket.h>
+#include <sys/un.h>
+#include <unistd.h>
+
+#include "common.h"
+
+int g_sock_fd;
+
+void
+init_socket(void)
+{
+	struct sockaddr_un sock_addr;
+
+	memset(&sock_addr, 0, sizeof(sock_addr));
+
+	char *sock_path = getenv(SOCK_ENV_VAR);
+
+	if (sock_path) {
+		strncpy(sock_addr.sun_path, sock_path, sizeof(sock_addr.sun_path));
+	} else {
+		strncpy(sock_addr.sun_path, SOCK_DEF_PATH, sizeof(sock_addr.sun_path));
+	}
+
+	sock_addr.sun_family = AF_UNIX;
+
+	if ((g_sock_fd = socket(AF_UNIX, SOCK_STREAM, 0)) < 0) {
+		die("failed to create socket\n");
+	}
+
+	unlink(sock_addr.sun_path);
+
+	if (bind(g_sock_fd, (struct sockaddr *)&sock_addr, sizeof(sock_addr)) < 0) {
+		die("failed to bind socket\n");
+	}
+
+	if (listen(g_sock_fd, 1) < 0) {
+		die("failed to listen to socket\n");
+	}
+}

src/kiwmi/ipc.h

@@ -0,0 +1,15 @@
+/* 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 IPC_H
+#define IPC_H
+
+void init_socket(void);
+
+extern int g_sock_fd;
+
+#endif /* IPC_H */

src/kiwmi/main.c

@@ -5,10 +5,12 @@
 #include <getopt.h>
 #include <limits.h>
 #include <signal.h>
+#include <sys/select.h>
 #include <sys/wait.h>
 #include <unistd.h>
 
 #include "common.h"
+#include "ipc.h"
 
 static void exec_config(const char *path);
 static void sig_handler(int sig);
@@ -68,7 +70,23 @@ main(int argc, char *argv[])
 	signal(SIGCHLD, sig_handler);
 	signal(SIGPIPE, SIG_IGN);
 
+	init_socket();
+
 	exec_config(config_path);
+
+	int max_fd = g_sock_fd + 1;
+	fd_set file_descriptors;
+
+	while (g_is_about_to_quit) {
+		FD_ZERO(&file_descriptors);
+		FD_SET(g_sock_fd, &file_descriptors);
+
+		select(max_fd, &file_descriptors, NULL, NULL, NULL);
+
+		if (FD_ISSET(g_sock_fd, &file_descriptors)) {
+			// TODO: handle client event
+		}
+	}
 }
 
 static void