Monitor OPK folders using inotify and automatically add/delete links

src/monitor.cpp

@@ -0,0 +1,71 @@
+#ifdef ENABLE_INOTIFY
+#include "debug.h"
+
+#include <dirent.h>
+#include <pthread.h>
+#include <SDL.h>
+#include <signal.h>
+#include <sys/inotify.h>
+#include <unistd.h>
+
+#include "monitor.h"
+
+static void * inotify_thd(void *p)
+{
+	const char *path = (const char *) p;
+	int wd, fd;
+
+	DEBUG("Starting inotify thread for path %s...\n", path);
+
+	fd = inotify_init();
+	if (fd == -1) {
+		ERROR("Unable to start inotify\n");
+		return NULL;
+	}
+
+	wd = inotify_add_watch(fd, path, IN_MOVED_FROM | IN_MOVED_TO |
+				IN_CLOSE_WRITE | IN_DELETE);
+	if (wd == -1) {
+		ERROR("Unable to add inotify watch\n");
+		close(fd);
+		return NULL;
+	}
+
+	DEBUG("Starting watching directory %s\n", path);
+
+	for (;;) {
+		size_t len = sizeof(struct inotify_event) + NAME_MAX + 1;
+		struct inotify_event event;
+		char buf[256];
+
+		read(fd, &event, len);
+		sprintf(buf, "%s/%s", path, event.name);
+
+		/* Don't bother other files than OPKs */
+		len = strlen(event.name);
+		if (len < 5 || strncmp(event.name + len - 4, ".opk", 4))
+			continue;
+
+		SDL_UserEvent e = {
+			.type = SDL_USEREVENT,
+			.code = (int) (event.mask & (IN_MOVED_TO | IN_CLOSE_WRITE)),
+			.data1 = strdup(buf),
+			.data2 = NULL,
+		};
+
+		/* Inject an user event, that will be handled as a "repaint"
+		 * event by the InputManager */
+		SDL_PushEvent((SDL_Event *) &e);
+	}
+}
+
+Monitor::Monitor(std::string path) : path(path)
+{
+	pthread_create(&thd, NULL, inotify_thd, (void *) path.c_str());
+}
+
+Monitor::~Monitor(void)
+{
+	pthread_kill(thd, SIGINT);
+}
+#endif