New configure options and macros for internal use.

* configure.ac: Add option --enable-log-clock.
* configure.ac: Add option --enable-werror.
* src/sysutils.c: New.
* src/Makefile.am (libgpg_error_la_SOURCES): Add sysutils.c
* src/gpgrt-int.h: Add internal i18n macros and hacks to make working
with sockets easier.
(es_stdin, es_stdout, es_stderr): New internal macros.
(snprintf): New macro.

Signed-off-by: Werner Koch <[email protected]>

1 files changed, 39 insertions, 0 deletions

diff --git a/src/sysutils.c b/src/sysutils.c
new file mode 100644
index 0000000..1933506
--- /dev/null
+++ b/src/sysutils.c
@@ -0,0 +1,39 @@
+/* sysutils.c - Platform specific helper functions
+ * Copyright (C) 2017 g10 Code GmbH
+ *
+ * This file is part of libgpg-error.
+ *
+ * libgpg-error is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public License
+ * as published by the Free Software Foundation; either version 2.1 of
+ * the License, or (at your option) any later version.
+ *
+ * libgpg-error is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this program; if not, see <https://www.gnu.org/licenses/>.
+ * SPDX-License-Identifier: LGPL-2.1+
+ */
+
+#include <config.h>
+#include <stdlib.h>
+#include <stdint.h>
+#include <unistd.h>
+
+#include "gpgrt-int.h"
+
+
+
+/* Return true if FD is valid.  */
+int
+_gpgrt_fd_valid_p (int fd)
+{
+  int d = dup (fd);
+  if (d < 0)
+    return 0;
+  close (d);
+  return 1;
+}