Added thirdparty: boost library

thirdparty/include/boost/process/v2/detail/impl/environment_posix.ipp

@@ -0,0 +1,81 @@
+//
+// process/this_process/detail/environment_posix.hpp
+// ~~~~~~~~~~~~~~~~~~~~~~~~
+//
+// Copyright (c) 2021 Klemens D. Morgenstern (klemens dot morgenstern at gmx dot net)
+//
+// Distributed under the Boost Software License, Version 1.0. (See accompanying
+// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+//
+
+#ifndef BOOST_PROCESS_V2_DETAIL_ENVIRONMENT_WIN_HPP
+#define BOOST_PROCESS_V2_DETAIL_ENVIRONMENT_WIN_HPP
+
+#include <boost/process/v2/detail/config.hpp>
+#include <boost/process/v2/detail/last_error.hpp>
+#include <boost/process/v2/environment.hpp>
+#include <boost/process/v2/cstring_ref.hpp>
+
+#include <unistd.h>
+#include <cstring>
+
+
+BOOST_PROCESS_V2_BEGIN_NAMESPACE
+
+namespace environment
+{
+namespace detail
+{
+
+basic_cstring_ref<char_type, value_char_traits<char>> get(
+        basic_cstring_ref<char_type, key_char_traits<char_type>> key,
+        error_code & ec)
+{
+    auto res = ::getenv(key.c_str());
+    if (res == nullptr)
+    {
+        BOOST_PROCESS_V2_ASSIGN_EC(ec, ENOENT, system_category())
+        return {};
+    }
+    return res;
+}
+
+void set(basic_cstring_ref<char_type,   key_char_traits<char_type>>   key,
+         basic_cstring_ref<char_type, value_char_traits<char_type>> value,
+                error_code & ec)
+{
+    if (::setenv(key.c_str(), value.c_str(), true))
+        BOOST_PROCESS_V2_ASSIGN_LAST_ERROR(ec)
+}
+
+void unset(basic_cstring_ref<char_type, key_char_traits<char_type>> key, error_code & ec)
+{
+    if (::unsetenv(key.c_str()))
+        BOOST_PROCESS_V2_ASSIGN_LAST_ERROR(ec)
+}
+
+
+native_handle_type load_native_handle() { return ::environ; }
+
+
+native_iterator next(native_iterator nh)
+{
+    return nh + 1;
+}
+
+native_iterator find_end(native_handle_type nh)
+{
+    while (*nh != nullptr)
+        nh++;
+    return nh;
+}
+bool is_executable(const filesystem::path & p, error_code & ec)
+{
+    return filesystem::is_regular_file(p, ec) && (::access(p.c_str(), X_OK) == 0);
+}
+
+}
+}
+BOOST_PROCESS_V2_END_NAMESPACE
+
+#endif //BOOST_PROCESS_V2_DETAIL_ENVIRONMENT_WIN_HPP