Added Env class.

src/base/api/Api.cpp

@@ -37,6 +37,7 @@
 #include "base/api/requests/HttpApiRequest.h"
 #include "base/io/json/Json.h"
 #include "base/kernel/Base.h"
+#include "base/kernel/Env.h"
 #include "base/tools/Buffer.h"
 #include "base/tools/Chrono.h"
 #include "core/config/Config.h"
@@ -158,7 +159,7 @@ void xmrig::Api::exec(IApiRequest &request)
 
         auto &reply = request.reply();
         reply.AddMember("id",         StringRef(m_id),       allocator);
-        reply.AddMember("worker_id",  StringRef(m_workerId), allocator);
+        reply.AddMember("worker_id",  m_workerId.toJSON(), allocator);
         reply.AddMember("uptime",     (Chrono::currentMSecsSinceEpoch() - m_timestamp) / 1000, allocator);
         reply.AddMember("restricted", request.isRestricted(), allocator);
         reply.AddMember("resources",  getResources(request.doc()), allocator);
@@ -245,12 +246,8 @@ void xmrig::Api::genId(const String &id)
 
 void xmrig::Api::genWorkerId(const String &id)
 {
-    memset(m_workerId, 0, sizeof(m_workerId));
-
-    if (id.size() > 0) {
-        strncpy(m_workerId, id.data(), sizeof(m_workerId) - 1);
-    }
-    else {
-        gethostname(m_workerId, sizeof(m_workerId) - 1);
+    m_workerId = Env::expand(id);
+    if (m_workerId.isEmpty()) {
+        m_workerId = Env::hostname();
     }
 }

src/base/api/Api.h

@@ -32,6 +32,7 @@
 
 #include "base/kernel/interfaces/IBaseListener.h"
 #include "base/tools/Object.h"
+#include "base/tools/String.h"
 
 
 namespace xmrig {
@@ -71,7 +72,7 @@ private:
 
     Base *m_base;
     char m_id[32]{};
-    char m_workerId[128]{};
+    String m_workerId;
     const uint64_t m_timestamp;
     Httpd *m_httpd = nullptr;
     std::vector<IApiListener *> m_listeners;

src/base/base.cmake

@@ -12,6 +12,7 @@ set(HEADERS_BASE
     src/base/kernel/config/BaseConfig.h
     src/base/kernel/config/BaseTransform.h
     src/base/kernel/Entry.h
+    src/base/kernel/Env.h
     src/base/kernel/interfaces/IBaseListener.h
     src/base/kernel/interfaces/IClient.h
     src/base/kernel/interfaces/IClientListener.h
@@ -66,6 +67,7 @@ set(SOURCES_BASE
     src/base/kernel/config/BaseConfig.cpp
     src/base/kernel/config/BaseTransform.cpp
     src/base/kernel/Entry.cpp
+    src/base/kernel/Env.cpp
     src/base/kernel/Platform.cpp
     src/base/kernel/Process.cpp
     src/base/kernel/Signals.cpp

src/base/io/log/backends/FileLog.cpp

@@ -25,6 +25,7 @@
 
 
 #include "base/io/log/backends/FileLog.h"
+#include "base/kernel/Env.h"
 
 
 #include <cassert>
@@ -35,7 +36,7 @@
 xmrig::FileLog::FileLog(const char *fileName)
 {
     uv_fs_t req;
-    m_file = uv_fs_open(uv_default_loop(), &req, fileName, O_CREAT | O_APPEND | O_WRONLY, 0644, nullptr);
+    m_file = uv_fs_open(uv_default_loop(), &req, Env::expand(fileName), O_CREAT | O_APPEND | O_WRONLY, 0644, nullptr);
     uv_fs_req_cleanup(&req);
 }
 

src/base/kernel/Env.cpp

@@ -0,0 +1,106 @@
+/* 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 2018-2019 SChernykh   <https://github.com/SChernykh>
+ * Copyright 2016-2019 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/kernel/Env.h"
+
+
+#include <regex>
+#include <uv.h>
+
+
+#ifndef UV_MAXHOSTNAMESIZE
+#   ifdef MAXHOSTNAMELEN
+#       define UV_MAXHOSTNAMESIZE (MAXHOSTNAMELEN + 1)
+#   else
+#       define UV_MAXHOSTNAMESIZE 256
+#   endif
+#endif
+
+
+xmrig::String xmrig::Env::expand(const char *in)
+{
+    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();
+}
+
+
+xmrig::String xmrig::Env::get(const char *name)
+{
+    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 {};
+}

src/base/kernel/Env.h

@@ -0,0 +1,47 @@
+/* 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 2018-2019 SChernykh   <https://github.com/SChernykh>
+ * Copyright 2016-2019 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/>.
+ */
+
+#ifndef XMRIG_ENV_H
+#define XMRIG_ENV_H
+
+
+#include "base/tools/String.h"
+
+
+namespace xmrig {
+
+
+class Env
+{
+public:
+    static String expand(const char *in);
+    static String get(const char *name);
+    static String hostname();
+};
+
+
+} /* namespace xmrig */
+
+
+#endif /* XMRIG_ENV_H */