Log subsystem rewritten, to handle both color and not color logs simultaneously and overall simplicity.

src/base/base.cmake

@@ -1,6 +1,9 @@
 set(HEADERS_BASE
     src/base/io/Console.h
     src/base/io/Json.h
+    src/base/io/log/backends/ConsoleLog.h
+    src/base/io/log/backends/FileLog.h
+    src/base/io/log/Log.h
     src/base/io/Watcher.h
     src/base/kernel/Entry.h
     src/base/kernel/interfaces/IClientListener.h
@@ -8,6 +11,7 @@ set(HEADERS_BASE
     src/base/kernel/interfaces/IConsoleListener.h
     src/base/kernel/interfaces/IDnsListener.h
     src/base/kernel/interfaces/ILineListener.h
+    src/base/kernel/interfaces/ILogBackend.h
     src/base/kernel/interfaces/ISignalListener.h
     src/base/kernel/interfaces/IStrategy.h
     src/base/kernel/interfaces/IStrategyListener.h
@@ -37,6 +41,9 @@ set(HEADERS_BASE
 set(SOURCES_BASE
     src/base/io/Console.cpp
     src/base/io/Json.cpp
+    src/base/io/log/backends/ConsoleLog.cpp
+    src/base/io/log/backends/FileLog.cpp
+    src/base/io/log/Log.cpp
     src/base/io/Watcher.cpp
     src/base/kernel/Entry.cpp
     src/base/kernel/Process.cpp
@@ -61,3 +68,12 @@ if (WIN32)
 else()
     set(SOURCES_OS src/base/io/Json_unix.cpp)
 endif()
+
+
+if (NOT WIN32)
+    CHECK_INCLUDE_FILE (syslog.h HAVE_SYSLOG_H)
+    if (HAVE_SYSLOG_H)
+        add_definitions(/DHAVE_SYSLOG_H)
+        set(SOURCES_SYSLOG src/base/log/backends/SysLog.h src/base/log/backends/SysLog.cpp)
+    endif()
+endif()

src/base/io/log/Log.cpp

@@ -0,0 +1,245 @@
+/* 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 2019      Spudz76     <https://github.com/Spudz76>
+ * 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/>.
+ */
+
+
+#ifdef WIN32
+#   include <winsock2.h>
+#   include <windows.h>
+#endif
+
+
+#include <string>
+#include <time.h>
+#include <uv.h>
+#include <vector>
+
+
+#include "base/io/log/Log.h"
+#include "base/kernel/interfaces/ILogBackend.h"
+
+
+namespace xmrig {
+
+
+static const char *colors_map[] = {
+    RED_BOLD_S,    // EMERG
+    RED_BOLD_S,    // ALERT
+    RED_BOLD_S,    // CRIT
+    RED_S,         // ERR
+    YELLOW_S,      // WARNING
+    WHITE_BOLD_S,  // NOTICE
+    nullptr,       // INFO
+#   ifdef WIN32
+    BLACK_BOLD_S   // DEBUG
+#   else
+    BRIGHT_BLACK_S // DEBUG
+#   endif
+};
+
+
+
+class LogPrivate
+{
+public:
+    inline LogPrivate() :
+        m_buf()
+    {
+        uv_mutex_init(&m_mutex);
+    }
+
+
+    inline ~LogPrivate()
+    {
+        uv_mutex_destroy(&m_mutex);
+
+        for (ILogBackend *backend : m_backends) {
+            delete backend;
+        }
+    }
+
+
+    inline void add(ILogBackend *backend) { m_backends.push_back(backend); }
+
+
+    void print(Log::Level level, const char *fmt, va_list args)
+    {
+        size_t size   = 0;
+        size_t offset = 0;
+
+        lock();
+        timestamp(level, size, offset);
+        color(level, size);
+
+        int rc = vsnprintf(m_buf + size, sizeof (m_buf) - offset - 32, fmt, args);
+        if (rc < 0) {
+            return unlock();
+        }
+
+        size += static_cast<size_t>(rc);
+        endl(size);
+
+        std::string txt(m_buf);
+        size_t i;
+        while ((i = txt.find(CSI)) != std::string::npos) {
+            txt.erase(i, txt.find('m', i) - i + 1);
+        }
+
+        if (!m_backends.empty()) {
+            for (ILogBackend *backend : m_backends) {
+                backend->print(level, m_buf, offset, size, true);
+                backend->print(level, txt.c_str(), offset, txt.size(), false);
+            }
+        }
+        else {
+            fputs(txt.c_str(), stdout);
+            fflush(stdout);
+        }
+
+        unlock();
+    }
+
+
+private:
+    inline void lock()   { uv_mutex_lock(&m_mutex); }
+    inline void unlock() { uv_mutex_unlock(&m_mutex); }
+
+
+    inline void timestamp(Log::Level level, size_t &size, size_t &offset)
+    {
+        if (level == Log::NONE) {
+            return;
+        }
+
+        time_t now = time(nullptr);
+        tm stime;
+
+#       ifdef _WIN32
+        localtime_s(&stime, &now);
+#       else
+        localtime_r(&now, &stime);
+#       endif
+
+        const int rc = snprintf(m_buf, sizeof(m_buf) - 1, "[%d-%02d-%02d %02d:%02d:%02d] ",
+                                stime.tm_year + 1900,
+                                stime.tm_mon + 1,
+                                stime.tm_mday,
+                                stime.tm_hour,
+                                stime.tm_min,
+                                stime.tm_sec
+                                );
+
+        if (rc > 0) {
+            size = offset = static_cast<size_t>(rc);
+        }
+    }
+
+
+    inline void color(Log::Level level, size_t &size)
+    {
+        if (level == Log::NONE) {
+            return;
+        }
+
+        const char *color = colors_map[level];
+        if (color == nullptr) {
+            return;
+        }
+
+        const size_t s = strlen(color);
+        memcpy(m_buf + size, color, s);
+
+        size += s;
+    }
+
+
+    inline void endl(size_t &size)
+    {
+#       ifdef _WIN32
+        memcpy(m_buf + size, CLEAR "\r\n", 7);
+        size += 6;
+#       else
+        memcpy(m_buf + size, CLEAR "\n", 6);
+        size += 5;
+#       endif
+    }
+
+
+    char m_buf[4096];
+    std::vector<ILogBackend*> m_backends;
+    uv_mutex_t m_mutex;
+};
+
+
+bool Log::colors   = true;
+LogPrivate *Log::d = new LogPrivate();
+
+
+} /* namespace xmrig */
+
+
+
+void xmrig::Log::add(ILogBackend *backend)
+{
+    if (d) {
+        d->add(backend);
+    }
+}
+
+
+void xmrig::Log::destroy()
+{
+    delete d;
+    d = nullptr;
+}
+
+
+void xmrig::Log::print(const char *fmt, ...)
+{
+    if (!d) {
+        return;
+    }
+
+    va_list args;
+    va_start(args, fmt);
+
+    d->print(NONE, fmt, args);
+
+    va_end(args);
+}
+
+
+void xmrig::Log::print(Level level, const char *fmt, ...)
+{
+    if (!d) {
+        return;
+    }
+
+    va_list args;
+    va_start(args, fmt);
+
+    d->print(level, fmt, args);
+
+    va_end(args);
+}

src/base/io/log/Log.h

@@ -0,0 +1,129 @@
+/* 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 2019      Spudz76     <https://github.com/Spudz76>
+ * 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_LOG_H
+#define XMRIG_LOG_H
+
+
+namespace xmrig {
+
+
+class ILogBackend;
+class LogPrivate;
+
+
+class Log
+{
+public:
+    enum Level : int {
+        NONE = -1,
+        EMERG,   // system is unusable
+        ALERT,   // action must be taken immediately
+        CRIT,    // critical conditions
+        ERR,     // error conditions
+        WARNING, // warning conditions
+        NOTICE,  // normal but significant condition
+        INFO,    // informational
+        DEBUG,   // debug-level messages
+    };
+
+    static void add(ILogBackend *backend);
+    static void destroy();
+    static void print(const char *fmt, ...);
+    static void print(Level level, const char *fmt, ...);
+
+    static bool colors;
+
+private:
+    static LogPrivate *d;
+};
+
+
+#define CSI            "\x1B["     // Control Sequence Introducer (ANSI spec name)
+#define CLEAR          CSI "0m"    // all attributes off
+#define BRIGHT_BLACK_S CSI "0;90m" // somewhat MD.GRAY
+#define BLACK_S        CSI "0;30m"
+#define BLACK_BOLD_S   CSI "1;30m" // another name for GRAY
+#define RED_S          CSI "0;31m"
+#define RED_BOLD_S     CSI "1;31m"
+#define GREEN_S        CSI "0;32m"
+#define GREEN_BOLD_S   CSI "1;32m"
+#define YELLOW_S       CSI "0;33m"
+#define YELLOW_BOLD_S  CSI "1;33m"
+#define BLUE_S         CSI "0;34m"
+#define BLUE_BOLD_S    CSI "1;34m"
+#define MAGENTA_S      CSI "0;35m"
+#define MAGENTA_BOLD_S CSI "1;35m"
+#define CYAN_S         CSI "0;36m"
+#define CYAN_BOLD_S    CSI "1;36m"
+#define WHITE_S        CSI "0;37m" // another name for LT.GRAY
+#define WHITE_BOLD_S   CSI "1;37m" // actually white
+
+//color wrappings
+#define BLACK(x)        BLACK_S x CLEAR
+#define BLACK_BOLD(x)   BLACK_BOLD_S x CLEAR
+#define RED(x)          RED_S x CLEAR
+#define RED_BOLD(x)     RED_BOLD_S x CLEAR
+#define GREEN(x)        GREEN_S x CLEAR
+#define GREEN_BOLD(x)   GREEN_BOLD_S x CLEAR
+#define YELLOW(x)       YELLOW_S x CLEAR
+#define YELLOW_BOLD(x)  YELLOW_BOLD_S x CLEAR
+#define BLUE(x)         BLUE_S x CLEAR
+#define BLUE_BOLD(x)    BLUE_BOLD_S x CLEAR
+#define MAGENTA(x)      MAGENTA_S x CLEAR
+#define MAGENTA_BOLD(x) MAGENTA_BOLD_S x CLEAR
+#define CYAN(x)         CYAN_S x CLEAR
+#define CYAN_BOLD(x)    CYAN_BOLD_S x CLEAR
+#define WHITE(x)        WHITE_S x CLEAR
+#define WHITE_BOLD(x)   WHITE_BOLD_S x CLEAR
+
+
+#define LOG_EMERG(x, ...)  xmrig::Log::print(xmrig::Log::EMERG,   x, ##__VA_ARGS__)
+#define LOG_ALERT(x, ...)  xmrig::Log::print(xmrig::Log::ALERT,   x, ##__VA_ARGS__)
+#define LOG_CRIT(x, ...)   xmrig::Log::print(xmrig::Log::CRIT,    x, ##__VA_ARGS__)
+#define LOG_ERR(x, ...)    xmrig::Log::print(xmrig::Log::ERR,     x, ##__VA_ARGS__)
+#define LOG_WARN(x, ...)   xmrig::Log::print(xmrig::Log::WARNING, x, ##__VA_ARGS__)
+#define LOG_NOTICE(x, ...) xmrig::Log::print(xmrig::Log::NOTICE,  x, ##__VA_ARGS__)
+#define LOG_INFO(x, ...)   xmrig::Log::print(xmrig::Log::INFO,    x, ##__VA_ARGS__)
+
+#ifdef APP_DEBUG
+#   define LOG_DEBUG(x, ...) xmrig::Log::print(xmrig::Log::DEBUG, x, ##__VA_ARGS__)
+#else
+#   define LOG_DEBUG(x, ...)
+#endif
+
+#if defined(APP_DEBUG) || defined(APP_DEVEL)
+#   define LOG_DEBUG_ERR(x, ...)  xmrig::Log::print(xmrig::Log::ERR,     x, ##__VA_ARGS__)
+#   define LOG_DEBUG_WARN(x, ...) xmrig::Log::print(xmrig::Log::WARNING, x, ##__VA_ARGS__)
+#else
+#   define LOG_DEBUG_ERR(x, ...)
+#   define LOG_DEBUG_WARN(x, ...)
+#endif
+
+
+} /* namespace xmrig */
+
+
+#endif /* XMRIG_LOG_H */

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

@@ -0,0 +1,97 @@
+/* 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 2019      Spudz76     <https://github.com/Spudz76>
+ * 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 <stdio.h>
+
+
+#include "base/tools/Handle.h"
+#include "base/io/log/backends/ConsoleLog.h"
+#include "base/io/log/Log.h"
+
+
+xmrig::ConsoleLog::ConsoleLog() :
+    m_stream(nullptr)
+{
+    m_tty = new uv_tty_t;
+
+    if (uv_tty_init(uv_default_loop(), m_tty, 1, 0) < 0) {
+        Log::colors = false;
+        return;
+    }
+
+    uv_tty_set_mode(m_tty, UV_TTY_MODE_NORMAL);
+    m_stream = reinterpret_cast<uv_stream_t*>(m_tty);
+
+#   ifdef WIN32
+    HANDLE handle = GetStdHandle(STD_INPUT_HANDLE);
+    if (handle != INVALID_HANDLE_VALUE) {
+        DWORD mode = 0;
+        if (GetConsoleMode(handle, &mode)) {
+           mode &= ~ENABLE_QUICK_EDIT_MODE;
+           SetConsoleMode(handle, mode | ENABLE_EXTENDED_FLAGS);
+        }
+    }
+#   endif
+}
+
+
+xmrig::ConsoleLog::~ConsoleLog()
+{
+    Handle::close(m_tty);
+}
+
+
+void xmrig::ConsoleLog::print(int, const char *line, size_t, size_t size, bool colors)
+{
+    if (Log::colors != colors) {
+        return;
+    }
+
+#   ifdef _WIN32
+    uv_buf_t buf = uv_buf_init(const_cast<char *>(line), static_cast<unsigned int>(size));
+#   else
+    uv_buf_t buf = uv_buf_init(const_cast<char *>(line), size);
+#   endif
+
+    if (!isWritable()) {
+        fputs(line, stdout);
+        fflush(stdout);
+    }
+    else {
+        uv_try_write(m_stream, &buf, 1);
+    }
+}
+
+
+bool xmrig::ConsoleLog::isWritable() const
+{
+    if (!m_stream || uv_is_writable(m_stream) != 1) {
+        return false;
+    }
+
+    const uv_handle_type type = uv_guess_handle(1);
+    return type == UV_TTY || type == UV_NAMED_PIPE;
+}

src/base/io/log/backends/ConsoleLog.h

@@ -0,0 +1,60 @@
+/* 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 2019      Spudz76     <https://github.com/Spudz76>
+ * 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_CONSOLELOG_H
+#define XMRIG_CONSOLELOG_H
+
+
+typedef struct uv_stream_s uv_stream_t;
+typedef struct uv_tty_s uv_tty_t;
+
+
+#include "base/kernel/interfaces/ILogBackend.h"
+
+
+namespace xmrig {
+
+
+class ConsoleLog : public ILogBackend
+{
+public:
+    ConsoleLog();
+    ~ConsoleLog() override;
+
+protected:
+    void print(int level, const char *line, size_t offset, size_t size, bool colors) override;
+
+private:
+    bool isWritable() const;
+
+    uv_stream_t *m_stream;
+    uv_tty_t *m_tty;
+};
+
+
+} /* namespace xmrig */
+
+
+#endif /* XMRIG_CONSOLELOG_H */

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

@@ -0,0 +1,66 @@
+/* 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 2019      Spudz76     <https://github.com/Spudz76>
+ * 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 <uv.h>
+
+
+#include "base/io/log/backends/FileLog.h"
+
+
+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);
+    uv_fs_req_cleanup(&req);
+}
+
+
+void xmrig::FileLog::print(int, const char *line, size_t, size_t size, bool colors)
+{
+    if (m_file < 0 || colors) {
+        return;
+    }
+
+#   ifdef _WIN32
+    uv_buf_t buf = uv_buf_init(strdup(line), static_cast<unsigned int>(size));
+#   else
+    uv_buf_t buf = uv_buf_init(strdup(line), size);
+#   endif
+
+    uv_fs_t *req = new uv_fs_t;
+    req->data = buf.base;
+
+    uv_fs_write(uv_default_loop(), req, m_file, &buf, 1, -1, FileLog::onWrite);
+}
+
+
+void xmrig::FileLog::onWrite(uv_fs_t *req)
+{
+    delete [] static_cast<char *>(req->data);
+
+    uv_fs_req_cleanup(req);
+    delete req;
+}

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

@@ -0,0 +1,58 @@
+/* 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 2019      Spudz76     <https://github.com/Spudz76>
+ * 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_FILELOG_H
+#define XMRIG_FILELOG_H
+
+
+typedef struct uv_fs_s uv_fs_t;
+
+
+#include "base/kernel/interfaces/ILogBackend.h"
+
+
+namespace xmrig {
+
+
+class FileLog : public ILogBackend
+{
+public:
+    FileLog(const char *fileName);
+
+
+protected:
+    void print(int level, const char *line, size_t offset, size_t size, bool colors) override;
+
+private:
+    static void onWrite(uv_fs_t *req);
+
+    int m_file;
+};
+
+
+} /* namespace xmrig */
+
+
+#endif /* XMRIG_FILELOG_H */

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

@@ -0,0 +1,53 @@
+/* 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 2019      Spudz76     <https://github.com/Spudz76>
+ * 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 <syslog.h>
+
+
+#include "base/io/log/backends/SysLog.h"
+#include "version.h"
+
+
+xmrig::SysLog::SysLog()
+{
+    openlog(APP_ID, LOG_PID, LOG_USER);
+}
+
+
+xmrig::SysLog::~SysLog()
+{
+    closelog();
+}
+
+
+void xmrig::SysLog::print(int level, const char *line, size_t offset, size_t, bool colors)
+{
+    if (colors) {
+        return;
+    }
+
+    syslog(level == -1 ? LOG_INFO : level, line + offset);
+}

src/base/io/log/backends/SysLog.h

@@ -0,0 +1,50 @@
+/* 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 2019      Spudz76     <https://github.com/Spudz76>
+ * 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_SYSLOG_H
+#define XMRIG_SYSLOG_H
+
+
+#include "base/kernel/interfaces/ILogBackend.h"
+
+
+namespace xmrig {
+
+
+class SysLog : public ILogBackend
+{
+public:
+    SysLog();
+    ~SysLog();
+
+protected:
+    void print(int level, const char *line, size_t offset, size_t size, bool colors) override;
+};
+
+
+} /* namespace xmrig */
+
+
+#endif /* XMRIG_SYSLOG_H */

src/base/kernel/interfaces/ILogBackend.h

@@ -0,0 +1,49 @@
+/* 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 2019      Spudz76     <https://github.com/Spudz76>
+ * 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_ILOGBACKEND_H
+#define XMRIG_ILOGBACKEND_H
+
+
+#include <stdarg.h>
+#include <stddef.h>
+
+
+namespace xmrig {
+
+
+class ILogBackend
+{
+public:
+    virtual ~ILogBackend() = default;
+
+    virtual void print(int level, const char *line, size_t offset, size_t size, bool colors) = 0;
+};
+
+
+} /* namespace xmrig */
+
+
+#endif // XMRIG_ILOGBACKEND_H

src/base/net/stratum/Pools.cpp

@@ -164,21 +164,21 @@ void xmrig::Pools::print() const
         if (Log::colors) {
             const int color = pool.isEnabled() ? (pool.isTLS() ? 32 : 36) : 31;
 
-            Log::i()->text(GREEN_BOLD(" * ") WHITE_BOLD("POOL #%-7zu") "\x1B[1;%dm%s\x1B[0m variant " WHITE_BOLD("%s"),
-                           i,
-                           color,
-                           pool.url().data(),
-                           pool.algorithm().variantName()
-                           );
+            Log::print(GREEN_BOLD(" * ") WHITE_BOLD("POOL #%-7zu") "\x1B[1;%dm%s\x1B[0m variant " WHITE_BOLD("%s"),
+                       i,
+                       color,
+                       pool.url().data(),
+                       pool.algorithm().variantName()
+                       );
         }
         else {
-            Log::i()->text(" * POOL #%-7zu%s%s variant=%s %s",
-                           i,
-                           pool.isEnabled() ? "" : "-",
-                           pool.url().data(),
-                           pool.algorithm().variantName(),
-                           pool.isTLS() ? "TLS" : ""
-                           );
+            Log::print(" * POOL #%-7zu%s%s variant=%s %s",
+                       i,
+                       pool.isEnabled() ? "" : "-",
+                       pool.url().data(),
+                       pool.algorithm().variantName(),
+                       pool.isTLS() ? "TLS" : ""
+                       );
         }
 
         i++;