From aa692f0dcdeefc846d7fa11222d6b2f6af17f5fa Mon Sep 17 00:00:00 2001
From: cbdev <cb@cbcdn.com>
Date: Sat, 17 Jun 2023 23:04:38 +0200
Subject: Core loop base

---
 nfcommander.c | 52 +++++++++++++++++++++++++++++++++++++++++++++++++---
 1 file changed, 49 insertions(+), 3 deletions(-)

(limited to 'nfcommander.c')

diff --git a/nfcommander.c b/nfcommander.c
index de50ef4..ceadec7 100644
--- a/nfcommander.c
+++ b/nfcommander.c
@@ -1,21 +1,54 @@
 #include <stdio.h>
+#include <signal.h>
+#include <sys/epoll.h>
+#include <unistd.h>
 
 #include "nfcommander.h"
 #include "config.h"
 #include "reader.h"
 #include "control.h"
 
-int usage(char* fn){
-	printf("NFCommander - trigger actions based on near-field tags\n");
+static volatile sig_atomic_t shutdown_requested = 0;
+static int epoll_fd = -1;
+
+static void signal_handler(int signum){
+	shutdown_requested = 1;
+}
+
+static int usage(char* fn){
+	printf("NFCommander %s - trigger actions based on near-field tags\n",
+			NFCOMMANDER_VERSION);
 	printf("\tUsage: %s <config-file>\n", fn);
 	return EXIT_FAILURE;
 }
 
+int core_manage_fd(int fd, int manage, notification_target_t system){
+	struct epoll_event event = {
+		.events = EPOLLIN,
+		.data.u32 = system
+	};
+
+	if(epoll_ctl(epoll_fd, manage ? EPOLL_CTL_ADD : EPOLL_CTL_DEL, fd, &event)){
+		fprintf(stderr, "Failed to modify epoll instance\n");
+		shutdown_requested = 1;
+		return 1;
+	}
+	return 0;
+}
+
 int main(int argc, char** argv){
 	if(argc < 2){
 		return usage(argv[0]);
 	}
 
+	//set up epoll instance
+	struct epoll_event events[10];
+	epoll_fd = epoll_create1(EPOLL_CLOEXEC);
+	if(epoll_fd < 0){
+		printf("Failed to create epoll instance\n");
+		return EXIT_FAILURE;
+	}
+
 	//read configuration
 	if(config_read(argv[1])){
 		return usage(argv[0]);
@@ -27,10 +60,23 @@ int main(int argc, char** argv){
 	//start control api
 	control_start();
 
+	//handle signals
+	signal(SIGINT, signal_handler);
+	signal(SIGPIPE, SIG_IGN);
+
 	//handle events
-	//TODO
+	while(!shutdown_requested){
+		int event_count = epoll_wait(epoll_fd, events, sizeof(events) / sizeof(struct epoll_event), 1000);
+		if(event_count < 0){
+			break;
+		}
+
+		printf("%d events\n", event_count);
+	}
 	
 	//clean up
+	close(epoll_fd);
+	epoll_fd = -1;
 	reader_free();
 	control_free();
 	config_free();
-- 
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