From: Christian Brauner <christian.brauner@ubuntu.com>
Date: Sun, 17 Feb 2019 13:31:40 +0000 (+0100)
Subject: macro: introduce steal_fd()
X-Git-Tag: lxc-4.0.0~282^2~9
X-Git-Url: https://git.proxmox.com/?a=commitdiff_plain;h=4101805bb23d3d9567050720fa2f7e8b85cf7774;p=mirror_lxc.git

macro: introduce steal_fd()

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

diff --git a/src/lxc/macro.h b/src/lxc/macro.h
index bd632dc1f..61e626f2e 100644
--- a/src/lxc/macro.h
+++ b/src/lxc/macro.h
@@ -400,4 +400,11 @@ enum {
 		_ptr_;                     \
 	})
 
+#define steal_fd(fd)             \
+	({                       \
+		int _fd_ = (fd); \
+		(fd) = -EBADF;   \
+		_fd_;            \
+	})
+
 #endif /* __LXC_MACRO_H */