1 files changed, 32 insertions, 0 deletions
diff --git a/ext/tmpdir/tmpdir.c b/ext/tmpdir/tmpdir.c
new file mode 100644
index 0000000000..f046713b63
--- /dev/null
+++ b/ext/tmpdir/tmpdir.c
@@ -0,0 +1,32 @@
+#include <ruby/ruby.h>
+#include <ruby/encoding.h>
+
+#define numberof(array) (sizeof(array) / sizeof(*array))
+
+#ifdef HAVE_RB_W32_SYSTEM_TMPDIR
+UINT rb_w32_system_tmpdir(WCHAR *path, UINT len);
+VALUE rb_w32_conv_from_wchar(const WCHAR *wstr, rb_encoding *enc);
+#endif
+
+static VALUE
+system_tmpdir(void)
+{
+#ifdef HAVE_RB_W32_SYSTEM_TMPDIR
+    WCHAR path[_MAX_PATH];
+    UINT len = rb_w32_system_tmpdir(path, numberof(path));
+    if (!len) return Qnil;
+    return rb_w32_conv_from_wchar(path, rb_filesystem_encoding());
+#else
+    return rb_filesystem_str_new_cstr("/tmp");
+#endif
+}
+
+/*
+ * sets Dir.@@systmpdir.
+ */
+void
+Init_tmpdir(void)
+{
+    rb_cvar_set(rb_cDir, rb_intern_const("@@systmpdir"),
+		rb_obj_freeze(system_tmpdir()));
+}