fully resolve symlinks when creating lockfiles

diff --git a/merge-recursive.c b/merge-recursive.c
index 8f72b2c079a68ac5cb9d1c90bb7b72fa779efb5f..c8539ec0bafce5e238d97d6397a9d08c2c92a09c 100644 (file)
--- a/merge-recursive.c
+++ b/merge-recursive.c
@@ -127,7 +127,7 @@ static void output(int v, const char *fmt, ...)
        va_end(args);
 }
 
-static void flush_output()
+static void flush_output(void)
 {
        struct output_buffer *b, *n;
        for (b = output_list; b; b = n) {
@@ -680,6 +680,12 @@ static int ll_xdl_merge(const struct ll_merge_driver *drv_unused,
 {
        xpparam_t xpp;
 
+       if (buffer_is_binary(orig->ptr, orig->size) ||
+                       buffer_is_binary(src1->ptr, src1->size) ||
+                       buffer_is_binary(src2->ptr, src2->size))
+               return error("Cannot merge binary files: %s vs. %s\n",
+                       name1, name2);
+
        memset(&xpp, 0, sizeof(xpp));
        return xdl_merge(orig,
                         src1, name1,