Be more portable with realpath(3)

Author: rakuco

lwan-serve-files.c

@@ -117,7 +117,7 @@ serve_files(lwan_request_t *request, void *root_directory)
  lwan_request_set_response(request, response);
 
  /* FIXME: ``canonical_root'' should be cached somewhere. */
- canonical_root = canonicalize_file_name(root_directory);
+ canonical_root = realpath(root_directory, NULL);
  if (!canonical_root)
  return (errno == EACCES) ? HTTP_FORBIDDEN : HTTP_INTERNAL_ERROR;
 
@@ -127,7 +127,7 @@ serve_files(lwan_request_t *request, void *root_directory)
  goto end;
  }
 
- canonical_path = canonicalize_file_name(path_to_canonicalize);
+ canonical_path = realpath(path_to_canonicalize, NULL);
  if (!canonical_path) {
  switch (errno) {
  case EACCES: