Added opendir and readdir.

sources/sourcefs.c

@@ -1,6 +1,7 @@
 #define _GNU_SOURCE
 
 #include "sourcefs.h"
+#include <dirent.h>
 #include <fcntl.h>
 #include <stdio.h>
 #include <sys/stat.h>
@@ -9,6 +10,8 @@ static struct source_files_handle {
   int root_fd;
 } handle;
 
+void source_fname_translate(const char *filename) {}
+
 int source_init(const char *root_path) {
   int root_fd = open(root_path, O_PATH);
 
@@ -26,3 +29,12 @@ int source_stat(const char *restrict pathname, struct stat *restrict statbuf) {
   int statret = fstatat(handle.root_fd, pathname, statbuf, 0);
   return statret;
 }
+
+DIR *source_opendir(const char *filename) {
+  int fd = openat(handle.root_fd, filename, NULL);
+  DIR *dir_pointer = fdopendir(fd);
+  return dir_pointer;
+}
+
+// Just regular readdir in disguise.
+struct dirent *source_readdir(DIR *dirp) { return readdir(dirp); }