From c49541058c40623b0c337a7e95193142c8dc9947 Mon Sep 17 00:00:00 2001
From: Tomoyuki Sahara <tsahara@iij.ad.jp>
Date: Thu, 8 Aug 2013 13:58:47 +0900
Subject: use lstat(2) to check if it's a symlink

---
 src/file_test.c | 22 +++++++++++++++++++---
 1 file changed, 19 insertions(+), 3 deletions(-)

diff --git a/src/file_test.c b/src/file_test.c
index 0d40c31a8..872f7aebc 100644
--- a/src/file_test.c
+++ b/src/file_test.c
@@ -21,7 +21,7 @@
 extern struct mrb_data_type mrb_io_type;
 
 static int
-mrb_stat(mrb_state *mrb, mrb_value obj, struct stat *st)
+mrb_stat0(mrb_state *mrb, mrb_value obj, struct stat *st, int do_lstat)
 {
   mrb_value tmp;
   mrb_value io_klass, str_klass;
@@ -44,12 +44,28 @@ mrb_stat(mrb_state *mrb, mrb_value obj, struct stat *st)
 
   tmp = mrb_funcall(mrb, obj, "is_a?", 1, str_klass);
   if (mrb_test(tmp)) {
-    return stat(mrb_string_value_cstr(mrb, &obj), st);
+    if (do_lstat) {
+      return lstat(mrb_str_to_cstr(mrb, obj), st);
+    } else {
+      return stat(mrb_str_to_cstr(mrb, obj), st);
+    }
   }
 
   return -1;
 }
 
+static int
+mrb_stat(mrb_state *mrb, mrb_value obj, struct stat *st)
+{
+  return mrb_stat0(mrb, obj, st, 0);
+}
+
+static int
+mrb_lstat(mrb_state *mrb, mrb_value obj, struct stat *st)
+{
+  return mrb_stat0(mrb, obj, st, 1);
+}
+
 /*
  * Document-method: directory?
  *
@@ -142,7 +158,7 @@ mrb_filetest_s_symlink_p(mrb_state *mrb, mrb_value klass)
 
   mrb_get_args(mrb, "o", &obj);
 
-  if (mrb_stat(mrb, obj, &st) < 0)
+  if (mrb_lstat(mrb, obj, &st) == -1)
     return mrb_false_value();
   if (S_ISLNK(st.st_mode))
     return mrb_true_value();
-- 
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