$OpenBSD: patch-lib_compat_getent_c,v 1.1 2017/11/10 21:58:26 steven Exp $
work around different getent API, adapted from
https://github.com/balabit/syslog-ng/commit/8b33cbe143b00d6af72cb5145fecd67e6158a9dd

Index: lib/compat/getent.c
--- lib/compat/getent.c.orig
+++ lib/compat/getent.c
@@ -0,0 +1,60 @@
+/*
+ * Copyright (c) 2017 Balabit
+ *
+ * This library 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.
+ *
+ * This library 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 library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ * As an additional exemption you are allowed to compile & link against the
+ * OpenSSL libraries as published by the OpenSSL project. See the file
+ * COPYING for details.
+ *
+ */
+
+#if defined(sun) || defined(__sun) || defined(__OpenBSD__)
+
+#include "compat/getent-bb.h"
+#include <errno.h>
+
+int bb__getprotobynumber_r(int proto,
+                           struct protoent *result_buf, char *buf,
+                           size_t buflen, struct protoent **result)
+{
+  *result = getprotobynumber_r(proto, result_buf, buf, buflen);
+  return (*result ? NULL : errno);
+}
+
+int bb__getprotobyname_r(const char *name,
+                         struct protoent *result_buf, char *buf,
+                         size_t buflen, struct protoent **result)
+{
+  *result = getprotobyname_r(name, result_buf, buf, buflen);
+  return (*result ? NULL : errno);
+}
+
+int bb__getservbyport_r(int port, const char *proto,
+                        struct servent *result_buf, char *buf,
+                        size_t buflen, struct servent **result)
+{
+  *result =  getservbyport_r(port, proto, result_buf, buf, buflen);
+  return (*result ? NULL : errno);
+}
+
+int bb__getservbyname_r(const char *name, const char *proto,
+                        struct servent *result_buf, char *buf,
+                        size_t buflen, struct servent **result)
+{
+  *result =  getservbyname_r(name, proto, result_buf, buf, buflen);
+  return (*result ? NULL : errno);
+}
+#endif
