From 130fde81307984e4616b6a0bcdd38b640e732d76 Mon Sep 17 00:00:00 2001
From: Paul Sokolovsky <pfalcon@users.sourceforge.net>
Date: Wed, 16 Dec 2015 00:38:05 +0200
Subject: [PATCH] uos: Add errno() function to get/set errno value.

---
 unix/modos.c        | 11 +++++++++++
 unix/qstrdefsport.h |  1 +
 2 files changed, 12 insertions(+)

diff --git a/unix/modos.c b/unix/modos.c
index abc96e638d..9293d59d0f 100644
--- a/unix/modos.c
+++ b/unix/modos.c
@@ -201,8 +201,19 @@ STATIC mp_obj_t mod_os_ilistdir(mp_uint_t n_args, const mp_obj_t *args) {
 }
 STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(mod_os_ilistdir_obj, 0, 1, mod_os_ilistdir);
 
+STATIC mp_obj_t mod_os_errno(mp_uint_t n_args, const mp_obj_t *args) {
+    if (n_args == 0) {
+        return MP_OBJ_NEW_SMALL_INT(errno);
+    }
+
+    errno = mp_obj_get_int(args[0]);
+    return mp_const_none;
+}
+STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(mod_os_errno_obj, 0, 1, mod_os_errno);
+
 STATIC const mp_rom_map_elem_t mp_module_os_globals_table[] = {
     { MP_ROM_QSTR(MP_QSTR___name__), MP_ROM_QSTR(MP_QSTR_uos) },
+    { MP_ROM_QSTR(MP_QSTR_errno), MP_ROM_PTR(&mod_os_errno_obj) },
     { MP_ROM_QSTR(MP_QSTR_stat), MP_ROM_PTR(&mod_os_stat_obj) },
     #if MICROPY_PY_OS_STATVFS
     { MP_ROM_QSTR(MP_QSTR_statvfs), MP_ROM_PTR(&mod_os_statvfs_obj) },
diff --git a/unix/qstrdefsport.h b/unix/qstrdefsport.h
index 9965c030c4..d761c0f541 100644
--- a/unix/qstrdefsport.h
+++ b/unix/qstrdefsport.h
@@ -44,6 +44,7 @@ Q(unlink)
 Q(getenv)
 Q(mkdir)
 Q(ilistdir)
+Q(errno)
 
 Q(uselect)
 Q(poll)