tests: add win32 setenv implementation

tests/include/win32/setenv.h

@@ -0,0 +1,52 @@
+/*  Fluent Bit
+ *  ==========
+ *  Copyright (C) 2015-2023 The Fluent Bit Authors
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+
+/**
+ * This file provides windows wrappers for libc's setenv and unsetenv by using
+ * the _putenv_s function, which behaves in a similar manner.
+ *
+ * setenv man page: 
+ * https://man7.org/linux/man-pages/man3/setenv.3.html
+ * SetEnvironmentVariable docs: 
+ * https://learn.microsoft.com/en-us/windows/win32/api/winbase/nf-winbase-setenvironmentvariable
+ *
+ * - Braydon Kains, @braydonk
+ */
+
+#ifndef SET_ENV_H_
+#define SET_ENV_H_
+
+/**
+ * Just in case some silly goose includes it in a non-Windows build.
+ */
+#ifdef _WIN32
+
+#include <stdlib.h>
+
+int setenv(char *name, char *value, int overwrite) 
+{
+    return _putenv_s(name, value);
+}
+
+int unsetenv(char *name)
+{
+    return _putenv_s(name, "");
+}
+
+#endif /* _WIN32 */
+
+#endif /* SET_ENV_H_ */

tests/internal/parser.c

@@ -11,6 +11,10 @@
 #include <string.h>
 #include "flb_tests_internal.h"
 
+#ifdef _WIN32
+#include "../include/win32/setenv.h"
+#endif
+
 /* Parsers configuration */
 #define JSON_PARSERS  FLB_TESTS_DATA_PATH "/data/parser/json.conf"
 #define REGEX_PARSERS FLB_TESTS_DATA_PATH "/data/parser/regex.conf"

tests/internal/parser_json.c

@@ -27,6 +27,10 @@
 #include <math.h>
 #include "flb_tests_internal.h"
 
+#ifdef _WIN32
+#include "../include/win32/setenv.h"
+#endif
+
 static int msgpack_strncmp(char* str, size_t str_len, msgpack_object obj)
 {
     int ret = -1;

tests/internal/parser_logfmt.c

@@ -27,6 +27,10 @@
 #include <math.h>
 #include "flb_tests_internal.h"
 
+#ifdef _WIN32
+#include "../include/win32/setenv.h"
+#endif
+
 static int msgpack_strncmp(char* str, size_t str_len, msgpack_object obj)
 {
     int ret = -1;

tests/internal/parser_ltsv.c

@@ -27,6 +27,10 @@
 #include <math.h>
 #include "flb_tests_internal.h"
 
+#ifdef _WIN32
+#include "../include/win32/setenv.h"
+#endif
+
 static int msgpack_strncmp(char* str, size_t str_len, msgpack_object obj)
 {
     int ret = -1;

tests/internal/parser_regex.c

@@ -27,6 +27,10 @@
 #include <math.h>
 #include "flb_tests_internal.h"
 
+#ifdef _WIN32
+#include "../include/win32/setenv.h"
+#endif
+
 static int msgpack_strncmp(char* str, size_t str_len, msgpack_object obj)
 {
     int ret = -1;

tests/runtime/filter_parser.c

@@ -5,6 +5,10 @@
 #include <fluent-bit/flb_parser.h>
 #include "flb_tests_runtime.h"
 
+#ifdef _WIN32
+#include "../include/win32/setenv.h"
+#endif
+
 #define FLUSH_INTERVAL "1.0"
 
 pthread_mutex_t result_mutex = PTHREAD_MUTEX_INITIALIZER;