Update base.

src/base/io/Env.cpp

@@ -0,0 +1,153 @@
+/* XMRig
+ * Copyright 2010      Jeff Garzik <jgarzik@pobox.com>
+ * Copyright 2012-2014 pooler      <pooler@litecoinpool.org>
+ * Copyright 2014      Lucas Jones <https://github.com/lucasjones>
+ * Copyright 2014-2016 Wolf9466    <https://github.com/OhGodAPet>
+ * Copyright 2016      Jay D Dee   <jayddee246@gmail.com>
+ * Copyright 2017-2018 XMR-Stak    <https://github.com/fireice-uk>, <https://github.com/psychocrypt>
+ * Copyright 2018-2020 SChernykh   <https://github.com/SChernykh>
+ * Copyright 2016-2020 XMRig       <https://github.com/xmrig>, <support@xmrig.com>
+ *
+ *   This program is free software: you can redistribute it and/or modify
+ *   it under the terms of the GNU General Public License as published by
+ *   the Free Software Foundation, either version 3 of the License, or
+ *   (at your option) any later version.
+ *
+ *   This program 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 General Public License for more details.
+ *
+ *   You should have received a copy of the GNU General Public License
+ *   along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+
+#include "base/io/Env.h"
+#include "base/kernel/Process.h"
+#include "version.h"
+
+
+#include <regex>
+#include <uv.h>
+#include <map>
+
+
+#ifndef _WIN32
+#   include <unistd.h>
+#endif
+
+
+#ifndef UV_MAXHOSTNAMESIZE
+#   ifdef MAXHOSTNAMELEN
+#       define UV_MAXHOSTNAMESIZE (MAXHOSTNAMELEN + 1)
+#   else
+#       define UV_MAXHOSTNAMESIZE 256
+#   endif
+#endif
+
+
+namespace xmrig {
+
+
+#ifdef XMRIG_FEATURE_ENV
+static std::map<String, String> variables;
+
+
+static void createVariables()
+{
+    variables.insert({ "XMRIG_VERSION",  APP_VERSION });
+    variables.insert({ "XMRIG_KIND",     APP_KIND });
+    variables.insert({ "XMRIG_HOSTNAME", Env::hostname() });
+    variables.insert({ "XMRIG_EXE",      Process::exepath() });
+    variables.insert({ "XMRIG_EXE_DIR",  Process::location(Process::ExeLocation) });
+    variables.insert({ "XMRIG_CWD",      Process::location(Process::CwdLocation) });
+    variables.insert({ "XMRIG_HOME_DIR", Process::location(Process::HomeLocation) });
+    variables.insert({ "XMRIG_TEMP_DIR", Process::location(Process::TempLocation) });
+    variables.insert({ "XMRIG_DATA_DIR", Process::location(Process::DataLocation) });
+}
+#endif
+
+
+} // namespace xmrig
+
+
+xmrig::String xmrig::Env::expand(const char *in)
+{
+#   ifdef XMRIG_FEATURE_ENV
+    if (in == nullptr) {
+        return {};
+    }
+
+    std::string text(in);
+    if (text.size() < 4) {
+        return text.c_str();
+    }
+
+    static const std::regex env_re{R"--(\$\{([^}]+)\})--"};
+
+    std::map<std::string, String> vars;
+
+    for (std::sregex_iterator i = std::sregex_iterator(text.begin(), text.end(), env_re); i != std::sregex_iterator(); ++i) {
+        std::smatch m = *i;
+        const auto var = m.str();
+
+        if (vars.count(var)) {
+            continue;
+        }
+
+        vars.insert({ var, get(m[1].str().c_str()) });
+    }
+
+    for (const auto &kv : vars) {
+        if (kv.second.isNull()) {
+            continue;
+        }
+
+        size_t pos = 0;
+        while ((pos = text.find(kv.first, pos)) != std::string::npos) {
+            text.replace(pos, kv.first.size(), kv.second);
+            pos += kv.second.size();
+        }
+    }
+
+    return text.c_str();
+#   else
+    return in;
+#   endif
+}
+
+
+xmrig::String xmrig::Env::get(const String &name)
+{
+#   ifdef XMRIG_FEATURE_ENV
+    if (variables.empty()) {
+        createVariables();
+    }
+
+    if (variables.count(name)) {
+        return variables.at(name);
+    }
+#   endif
+
+    return static_cast<const char *>(getenv(name));
+}
+
+
+xmrig::String xmrig::Env::hostname()
+{
+    char buf[UV_MAXHOSTNAMESIZE]{};
+    size_t size = sizeof(buf);
+
+#   if UV_VERSION_HEX >= 0x010c00
+    if (uv_os_gethostname(buf, &size) == 0) {
+        return static_cast<const char *>(buf);
+    }
+#   else
+    if (gethostname(buf, size) == 0) {
+        return static_cast<const char *>(buf);
+    }
+#   endif
+
+    return {};
+}