memory_utils: add close_prot_errno_mov()

Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>
lxc · Feb 26, 2021 · 826de44 · 826de44
1 parent f3b1c04
commit 826de44
Showing 1 changed file with 9 additions and 0 deletions.
diff --git a/src/lxc/memory_utils.h b/src/lxc/memory_utils.h
@@ -29,6 +29,15 @@
 		fd = -EBADF;        \
 	}
 
+#define close_prot_errno_move(fd, new_fd) \
+	if (fd >= 0) {                       \
+		int _e_ = errno;             \
+		close(fd);                   \
+		errno = _e_;                 \
+		fd = new_fd;                 \
+		new_fd = -EBADF;	     \
+	}
+
 static inline void close_prot_errno_disarm_function(int *fd)
 {
        close_prot_errno_disarm(*fd);