Moved from C++ to C.

After some consideration I decided to use C instead of C++ because:
* `libfuse` is written in C.
* C is simpler.
* My original concerns with using C turned out to be BS.

sources/main.c

@@ -0,0 +1,37 @@
+#include <stdlib.h>
+#define FUSE_USE_VERSION 31
+
+#include "sourcefs.h"
+#include <fuse3/fuse.h>
+
+const char *mountpoint;
+
+/*
+ * #In this function we need to:
+ *
+ * * Open the folder we are mounting over (and remember it).
+ * * Initialize the process table.
+ */
+static void *icfs_init(struct fuse_conn_info *conn, struct fuse_config *cfg) {
+  (void)conn; /* Explicit way to tell we ignore these arguments. */
+  (void)cfg;  /* This also silences the compiler warnings. */
+
+  return NULL;
+}
+
+static const struct fuse_operations icfs_oper = {
+    .init = icfs_init,
+};
+
+int main(int argc, char *argv[]) {
+
+  int ret;
+
+  // FUSE won't tell us the mountpoint on it's own, so we need to extract it
+  // ourselves.
+  mountpoint = realpath(argv[argc - 2], NULL);
+
+  ret = fuse_main(argc, argv, &icfs_oper, NULL);
+
+  return ret;
+}

sources/main.cpp

@@ -1,23 +0,0 @@
-
-#define FUSE_USE_VERSION 31
-
-#include <fuse3/fuse.h>
-
-static void *hello_init(struct fuse_conn_info *conn, struct fuse_config *cfg) {
-  (void)conn;
-  cfg->kernel_cache = 1;
-  return NULL;
-}
-
-static const struct fuse_operations hello_oper = {
-    .init = hello_init,
-};
-
-int main(int argc, char *argv[]) {
-
-  int ret;
-
-  ret = fuse_main(argc, argv, &hello_oper, NULL);
-
-  return ret;
-}