From f39138ea4813f48de95a1e7568fbda9f7493beff Mon Sep 17 00:00:00 2001
From: Thomas Haller <thaller@redhat.com>
Date: Fri, 9 Dec 2016 09:22:29 +0100
Subject: [PATCH] shared: add nm_auto_close and nm_auto_fclose

We already have gs_fd_close, which however doesn't preserve
errno and only checks for fd != -1. Add our own define.

Downside is, we have to include stdio.h and errno.h,
which effectively ends up to be included *everywhere*.

(cherry picked from commit 312cea870dfbc363da44074bd6f56ccd283c5420)
---
 shared/nm-utils/nm-macros-internal.h | 28 +++++++++++++++++++++++++++-
 1 file changed, 27 insertions(+), 1 deletion(-)

diff --git a/shared/nm-utils/nm-macros-internal.h b/shared/nm-utils/nm-macros-internal.h
index b6b6bdee42..de90e3f58b 100644
--- a/shared/nm-utils/nm-macros-internal.h
+++ b/shared/nm-utils/nm-macros-internal.h
@@ -22,7 +22,9 @@
 #ifndef __NM_MACROS_INTERNAL_H__
 #define __NM_MACROS_INTERNAL_H__
 
+#include <stdio.h>
 #include <stdlib.h>
+#include <errno.h>
 
 #include "nm-glib.h"
 
@@ -59,7 +61,31 @@ _nm_auto_free_gstring_impl (GString **str)
 }
 #define nm_auto_free_gstring nm_auto(_nm_auto_free_gstring_impl)
 
-/********************************************************/
+static inline void
+_nm_auto_close_impl (int *pfd)
+{
+	if (*pfd >= 0) {
+		int errsv = errno;
+
+		(void) close (*pfd);
+		errno = errsv;
+	}
+}
+#define nm_auto_close nm_auto(_nm_auto_close_impl)
+
+static inline void
+_nm_auto_fclose_impl (FILE **pfd)
+{
+	if (*pfd) {
+		int errsv = errno;
+
+		(void) fclose (*pfd);
+		errno = errsv;
+	}
+}
+#define nm_auto_fclose nm_auto(_nm_auto_fclose_impl)
+
+/*****************************************************************************/
 
 /* http://stackoverflow.com/a/11172679 */
 #define  _NM_UTILS_MACRO_FIRST(...)                           __NM_UTILS_MACRO_FIRST_HELPER(__VA_ARGS__, throwaway)