From: Christian Brauner <christian.brauner@ubuntu.com>
Date: Sat, 7 Dec 2019 16:21:53 +0000 (+0100)
Subject: macro: add ret_errno()
X-Git-Tag: lxc-4.0.0~78^2~42
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=9958e6fe7f69871a8452cebf48e9e8da019fa6a0;p=thirdparty%2Flxc.git

macro: add ret_errno()

Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>
---

diff --git a/src/lxc/macro.h b/src/lxc/macro.h
index e011596d2..b4c9f4e7c 100644
--- a/src/lxc/macro.h
+++ b/src/lxc/macro.h
@@ -454,6 +454,12 @@ enum {
 		__ret__;                  \
 	})
 
+#define ret_errno(__errno__)       \
+	({                         \
+		errno = __errno__; \
+		-__errno__;        \
+	})
+
 #define free_replace_move_ptr(a, b) \
 	({                          \
 		free(a);            \