From 081da63d097dd5a1de360abd6dcf5c0eb01ecdfc Mon Sep 17 00:00:00 2001
From: Amaury Pouly <pamaury@rockbox.org>
Date: Thu, 24 Dec 2009 17:07:20 +0000
Subject: [PATCH] Add support for errno in plugins.

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@24109 a1c6a512-1295-4272-9138-f99709370657
---
 apps/plugin.c            | 2 ++
 apps/plugin.h            | 1 +
 firmware/include/errno.h | 4 ++++
 3 files changed, 7 insertions(+)

diff --git a/apps/plugin.c b/apps/plugin.c
index 3836d76d28..bd88da6647 100644
--- a/apps/plugin.c
+++ b/apps/plugin.c
@@ -40,6 +40,7 @@
 #include "version.h"
 #include "storage.h"
 #include "pcmbuf.h"
+#include "errno.h"
 
 #if CONFIG_CHARGING
 #include "power.h"
@@ -680,6 +681,7 @@ static const struct plugin_api rockbox_api = {
     viewportmanager_theme_enable,
     viewportmanager_theme_undo,
 #endif
+    &errno
 };
 
 int plugin_load(const char* plugin, const void* parameter)
diff --git a/apps/plugin.h b/apps/plugin.h
index 632533cb47..0a9b8a9a50 100644
--- a/apps/plugin.h
+++ b/apps/plugin.h
@@ -860,6 +860,7 @@ struct plugin_api {
                                          struct viewport *viewport);
     void (*viewportmanager_theme_undo)(enum screen_type screen, bool force_redraw);
 #endif
+    int* __errno;
 };
 
 /* plugin header */
diff --git a/firmware/include/errno.h b/firmware/include/errno.h
index 846cd0e339..3a923238fc 100644
--- a/firmware/include/errno.h
+++ b/firmware/include/errno.h
@@ -10,7 +10,11 @@
 
 #ifndef _SYS_ERRNO_H_
 
+#ifdef PLUGIN
+#define errno   (*rb->__errno)
+#else
 extern int errno;
+#endif
 
 #define	EPERM 1		/* Not super-user */
 #define	ENOENT 2	/* No such file or directory */