Don't rely on unspecified behavior

Calling access(p, m) with p == NULL is not specified, so don't do that.  On
GNU/Hurd systems doing so will result in a SIGSEGV.

Signed-off-by: Thomas Schwinge <tschwinge@gnu.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/builtin-add.c b/builtin-add.c
index 734547994f3a35e04fc7fdea10396c0c87bc6f0d..de5c108f8f5765e78c8ca15dcad58f3796015acc 100644 (file)
--- a/builtin-add.c
+++ b/builtin-add.c
@@ -60,7 +60,7 @@ static void fill_directory(struct dir_struct *dir, const char **pathspec,
                path = git_path("info/exclude");
                if (!access(path, R_OK))
                        add_excludes_from_file(dir, path);
-               if (!access(excludes_file, R_OK))
+               if (excludes_file != NULL && !access(excludes_file, R_OK))
                        add_excludes_from_file(dir, excludes_file);
        }