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diff --git a/src/transport/transport-testing-filenames2.c b/src/transport/transport-testing-filenames2.c
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+++ b/src/transport/transport-testing-filenames2.c
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+/*
+ This file is part of GNUnet.
+ Copyright (C) 2006, 2009, 2015, 2016 GNUnet e.V.
+
+ GNUnet 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.
+
+ GNUnet 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 transport-testing-filenames.c
+ * @brief convenience string manipulation functions for tests
+ * @author Matthias Wachs
+ * @author Christian Grothoff
+ */
+#include "transport-testing2.h"
+
+
+/**
+ * Removes all directory separators from absolute filename
+ *
+ * @param file the absolute file name, e.g. as found in argv[0]
+ * @return extracted file name, has to be freed by caller
+ */
+static char *
+extract_filename (const char *file)
+{
+ char *pch = GNUNET_strdup (file);
+ char *backup = pch;
+ char *filename = NULL;
+ char *res;
+
+ if (NULL != strstr (pch, "/"))
+ {
+ pch = strtok (pch, "/");
+ while (pch != NULL)
+ {
+ pch = strtok (NULL, "/");
+ if (pch != NULL)
+ {
+ filename = pch;
+ }
+ }
+ }
+ else
+ filename = pch;
+
+ res = GNUNET_strdup (filename);
+ GNUNET_free (backup);
+ return res;
+}
+
+
+/**
+ * Extracts the test filename from an absolute file name and removes
+ * the extension
+ *
+ * @param file absolute file name
+ * @return the result
+ */
+char *
+GNUNET_TRANSPORT_TESTING_get_test_name (const char *file)
+{
+ char *backup = extract_filename (file);
+ char *filename = backup;
+ char *dotexe;
+ char *ret;
+
+ if (NULL == filename)
+ return NULL;
+
+ /* remove "lt-" */
+ filename = strstr (filename, "test");
+ if (NULL == filename)
+ {
+ GNUNET_free (backup);
+ return NULL;
+ }
+
+ /* remove ".exe" */
+ if (NULL != (dotexe = strstr (filename, ".exe")))
+ dotexe[0] = '\0';
+ ret = GNUNET_strdup (filename);
+ GNUNET_free (backup);
+ return ret;
+}
+
+
+/**
+ * Extracts the filename from an absolute file name and removes the extension
+ *
+ * @param file absolute file name
+ * @return the result
+ */
+char *
+GNUNET_TRANSPORT_TESTING_get_test_source_name (const char *file)
+{
+ char *src = extract_filename (file);
+ char *split;
+
+ split = strstr (src, ".");
+ if (NULL != split)
+ split[0] = '\0';
+ return src;
+}
+
+
+/**
+ * Extracts the plugin name from an absolute file name and the test name
+ *
+ * @param file absolute file name
+ * @param test test name
+ * @return the result
+ */
+char *
+GNUNET_TRANSPORT_TESTING_get_test_plugin_name (const char *file,
+ const char *test)
+{
+ char *filename;
+ char *dotexe;
+ char *e = extract_filename (file);
+ char *t = extract_filename (test);
+ char *ret;
+
+ if (NULL == e)
+ goto fail;
+ /* remove "lt-" */
+ filename = strstr (e, "tes");
+ if (NULL == filename)
+ goto fail;
+ /* remove ".exe" */
+ if (NULL != (dotexe = strstr (filename, ".exe")))
+ dotexe[0] = '\0';
+
+ /* find last _ */
+ filename = strstr (filename, t);
+ if (NULL == filename)
+ goto fail;
+ /* copy plugin */
+ filename += strlen (t);
+ if ('\0' != *filename)
+ filename++;
+ ret = GNUNET_strdup (filename);
+ goto suc;
+fail:
+ ret = NULL;
+suc:
+ GNUNET_free (t);
+ GNUNET_free (e);
+ return ret;
+}
+
+
+/**
+ * This function takes the filename (e.g. argv[0), removes a "lt-"-prefix and
+ * if existing ".exe"-prefix and adds the peer-number
+ *
+ * @param file filename of the test, e.g. argv[0]
+ * @param count peer number
+ * @return the result
+ */
+char *
+GNUNET_TRANSPORT_TESTING_get_config_name (const char *file,
+ int count)
+{
+ char *filename = extract_filename (file);
+ char *backup = filename;
+ char *dotexe;
+ char *ret;
+
+ if (NULL == filename)
+ return NULL;
+ /* remove "lt-" */
+ filename = strstr (filename, "test");
+ if (NULL == filename)
+ goto fail;
+ /* remove ".exe" */
+ if (NULL != (dotexe = strstr (filename, ".exe")))
+ dotexe[0] = '\0';
+ GNUNET_asprintf (&ret,
+ "%s_peer%u.conf",
+ filename,
+ count);
+ GNUNET_free (backup);
+ return ret;
+fail:
+ GNUNET_free (backup);
+ return NULL;
+}
+
+
+/* end of transport-testing-filenames.c */