Initial commit

Makefile

@@ -0,0 +1,7 @@
+all: dungeon plugins
+
+dungeon: dungeon.c
+	cc -g -o dungeon dungeon.c -ldl -D_GNU_SOURCE
+
+plugins:
+	make -f plugins/*/Makefile

dungeon.c

@@ -0,0 +1,46 @@
+#include <stdio.h>
+#include <dlfcn.h>
+#include <stdlib.h>
+#include <assert.h>
+#include <dirent.h>
+#include <string.h>
+
+static void *load_plugin(const char *name)
+{
+	size_t len = strlen(name);
+	char filename[1 + 1 + 7 + 1 + len + 1 + len + 1 + 2 + 1];
+	sprintf(filename, "./plugins/%s/%s.so", name, name);
+
+	void *plugin_handle = dlmopen(LM_ID_BASE, filename, RTLD_NOW | RTLD_GLOBAL);
+
+	if (! plugin_handle) {
+		printf("%s\n", dlerror());
+		exit(EXIT_FAILURE);
+	}
+
+	return plugin_handle;
+}
+
+int main()
+{
+	void *main_plugin = load_plugin("game");
+
+	DIR *dir = opendir("plugins");
+	assert(dir);
+
+	struct dirent *dp;
+
+	while (dp = readdir(dir)) {
+		if (dp->d_name[0] != '.' && strcmp(dp->d_name, "game") != 0) {
+			load_plugin(dp->d_name);
+		}
+	}
+
+	closedir(dir);
+
+	void (*game_func)() = dlsym(main_plugin, "game");
+	assert(game_func);
+
+	game_func();
+}
+