add taler-config C version, useful once we depend on the next GNUnet release to avoid the LD_PRELOAD hack

src/util/taler-config.c

@@ -0,0 +1,73 @@
+/*
+     This file is part of Taler.
+     Copyright (C) 2012-2021 Taler Systems SA
+
+     Taler is free software: you can redistribute it and/or modify it
+     under the terms of the GNU Affero General Public License as published
+     by the Free Software Foundation, either version 3 of the License,
+     or (at your option) any later version.
+
+     Taler 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
+     Affero General Public License for more details.
+
+     You should have received a copy of the GNU Affero General Public License
+     along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+     SPDX-License-Identifier: AGPL3.0-or-later
+ */
+
+/**
+ * @file util/taler-config.c
+ * @brief tool to access and manipulate Taler configuration files
+ * @author Christian Grothoff
+ */
+#include "platform.h"
+#include "taler_util_lib.h"
+
+
+/**
+ * Program to manipulate configuration files.
+ *
+ * @param argc number of arguments from the command line
+ * @param argv command line arguments
+ * @return 0 ok, 1 on error
+ */
+int
+main (int argc,
+      char *const *argv)
+{
+  struct GNUNET_CONFIGURATION_ConfigSettings cs = {
+    .api_version = GNUNET_UTIL_VERSION,
+    .global_ret = EXIT_SUCCESS
+  };
+  struct GNUNET_GETOPT_CommandLineOption options[] = {
+    GNUNET_GETOPT_OPTION_END
+  };
+  enum GNUNET_GenericReturnValue ret;
+
+  if (GNUNET_OK !=
+      GNUNET_STRINGS_get_utf8_args (argc, argv,
+                                    &argc, &argv))
+    return EXIT_FAILURE;
+  TALER_OS_init ();
+  ret = GNUNET_PROGRAM_run (argc,
+                            argv,
+                            "taler-config [OPTIONS]",
+                            gettext_noop (
+                              "Manipulate Taler configuration files"),
+                            options,
+                            &GNUNET_CONFIGURATION_config_tool_run,
+                            &cs);
+  GNUNET_free_nz ((void *) argv);
+  GNUNET_CONFIGURATION_config_settings_free (&cs);
+  if (GNUNET_NO == ret)
+    return 0;
+  if (GNUNET_SYSERR == ret)
+    return EXIT_INVALIDARGUMENT;
+  return cs.global_ret;
+}
+
+
+/* end of taler-config.c */