From 21f8186fc54a2928a3c272ec38db57ec3c02edd0 Mon Sep 17 00:00:00 2001
From: buffet <niclas@countingsort.com>
Date: Mon, 1 Oct 2018 11:45:38 +0200
Subject: [PATCH] Added basic main loop

---
 lit/wmaffle.lit | 57 +++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 57 insertions(+)

diff --git a/lit/wmaffle.lit b/lit/wmaffle.lit
index 6979557..9814803 100644
--- a/lit/wmaffle.lit
+++ b/lit/wmaffle.lit
@@ -18,6 +18,8 @@ Here's an overview:
 
 char *argv0;
 
+int g_about_to_quit = 0;
+
 @{function definitions}
 
 int
@@ -33,6 +35,8 @@ main(int argc, char *argv[])
 
 	@{execute config}
 
+	@{main loop}
+
 	@{cleanup}
 }
 ---
@@ -292,3 +296,56 @@ We need to invoke this once all the connections are open
 --- execute config
 exec_config(config_path);
 ---
+
+@s Main loop
+
+This is the heart of wmaffle.
+
+A pretty basic loop: fetch event, decide if it's from X or the client, handle it.
+`select` is used for the first two steps.
+
+--- posix headers +=
+#include <sys/select.h>
+---
+
+--- variables local to main +=
+int max_fd;
+fd_set file_descriptors;
+---
+
+--- main loop
+max_fd = sock_fd + 1;
+
+while (!g_about_to_quit) {
+	FD_ZERO(&file_descriptors);
+	FD_SET(sock_fd, &file_descriptors);
+
+	select(max_fd, &file_descriptors, NULL, NULL, NULL);
+
+	if (FD_ISSET(sock_fd, &file_descriptors)) {
+		@{handle client event}
+	}
+}
+---
+
+@s Handle client event
+
+Until there's an actual WM, I'm just going to read messages and then print them out, so we have some sort of feedback.
+
+--- variables local to main +=
+int client_fd;
+---
+
+--- handle client event
+char msg[BUFSIZ];
+int msg_len;
+
+client_fd = accept(sock_fd, NULL, 0);
+
+if (!(client_fd < 0) && (msg_len = read(client_fd, msg, sizeof(msg))) > 0) {
+	// Client sent something
+	msg[msg_len] = '\0';
+	printf("Client sent: %s\n", msg);
+	close(client_fd);
+}
+---