dln_find.c: regular files only

* dln_find.c (dln_find_1): search regular files only.  based on
  the patch by Alex Coomans in [ruby-core:67766].  [Bug #10776]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@49391 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ChangeLog

@@ -1,3 +1,8 @@
+Sat Jan 24 19:56:25 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+
+	* dln_find.c (dln_find_1): search regular files only.  based on
+	  the patch by Alex Coomans in [ruby-core:67766].  [Bug #10776]
+
 Fri Jan 23 23:57:05 2015  Misumi Rize  <r@ayase-e.li>
 
 	* vm_insnhelper.c (vm_throw_start): search the target to break

dln_find.c

@@ -278,11 +278,10 @@ dln_find_1(const char *fname, const char *path, char *fbuf, size_t size,
 	}
 #endif /* _WIN32 or __EMX__ */
 
-	if (stat(fbuf, &st) == 0) {
+	if (stat(fbuf, &st) == 0 && !S_ISDIR(st.st_mode)) {
 	    if (exe_flag == 0) return fbuf;
 	    /* looking for executable */
-	    if (!S_ISDIR(st.st_mode) && eaccess(fbuf, X_OK) == 0)
-		return fbuf;
+	    if (eaccess(fbuf, X_OK) == 0) return fbuf;
 	}
       next:
 	/* if not, and no other alternatives, life is bleak */