add service mgmt lib & utils

4 files changed, 354 insertions, 0 deletions

diff --git a/utils/libservice/src/service.cpp b/utils/libservice/src/service.cpp
new file mode 100644
index 0000000..1f7cbef
--- /dev/null
+++ b/utils/libservice/src/service.cpp
@@ -0,0 +1,235 @@
+/**
+ * \file
+ * \author Egor Tensin <Egor.Tensin@gmail.com>
+ * \date 2015
+ * \copyright This file is licensed under the terms of the MIT License.
+ *            See LICENSE.txt for details.
+ */
+
+#include "libservice/common.hpp"
+#include "libservice/service.hpp"
+#include "libservice/service_handle.hpp"
+#include "libservice/service_manager.hpp"
+#include "libservice/windows_error.hpp"
+
+#include <Windows.h>
+
+#include <string>
+#include <utility>
+#include <vector>
+
+namespace libservice
+{
+    namespace
+    {
+        ServiceHandle open_service(const ServiceManager& mgr, const std::string& name)
+        {
+            const auto raw = OpenServiceA(
+                static_cast<SC_HANDLE>(mgr),
+                name.c_str(),
+                SERVICE_ALL_ACCESS);
+
+            if (NULL == raw)
+            {
+                const auto ec = GetLastError();
+                throw std::system_error(ec, WinErrorCategory::get(), LIBSERVICE_ERROR_PREFIX);
+            }
+
+            return ServiceHandle(raw);
+        }
+
+        ServiceHandle install_service(
+            const ServiceManager& mgr,
+            const std::string& name,
+            const std::string& bin_path)
+        {
+            const auto raw = CreateServiceA(
+                static_cast<SC_HANDLE>(mgr),
+                name.c_str(),
+                name.c_str(),
+                SERVICE_ALL_ACCESS,
+                SERVICE_KERNEL_DRIVER,
+                SERVICE_DEMAND_START,
+                SERVICE_ERROR_NORMAL,
+                bin_path.c_str(),
+                NULL,
+                NULL,
+                NULL,
+                NULL,
+                NULL);
+
+            if (NULL == raw)
+            {
+                const auto ec = GetLastError();
+                throw std::system_error(ec, WinErrorCategory::get(), LIBSERVICE_ERROR_PREFIX);
+            }
+
+            return ServiceHandle(raw);
+        }
+
+        void start_service(const ServiceHandle& handle)
+        {
+            if (!StartService(static_cast<SC_HANDLE>(handle), 0, NULL))
+            {
+                const auto ec = GetLastError();
+                throw std::system_error(ec, WinErrorCategory::get(), LIBSERVICE_ERROR_PREFIX);
+            }
+        }
+
+        void stop_service(const ServiceHandle& handle)
+        {
+            SERVICE_STATUS service_status;
+
+            if (!ControlService(static_cast<SC_HANDLE>(handle), SERVICE_CONTROL_STOP, &service_status))
+            {
+                const auto ec = GetLastError();
+                throw std::system_error(ec, WinErrorCategory::get(), LIBSERVICE_ERROR_PREFIX);
+            }
+        }
+
+        void uninstall_service(const ServiceHandle& handle)
+        {
+            if (!DeleteService(static_cast<SC_HANDLE>(handle)))
+            {
+                const auto ec = GetLastError();
+                throw std::system_error(ec, WinErrorCategory::get(), LIBSERVICE_ERROR_PREFIX);
+            }
+        }
+        
+        SERVICE_STATUS_PROCESS query_service_status(const ServiceHandle& handle)
+        {
+            SERVICE_STATUS_PROCESS status;
+            DWORD nbreq;
+
+            if (!QueryServiceStatusEx(static_cast<SC_HANDLE>(handle),
+                                      SC_STATUS_PROCESS_INFO,
+                                      reinterpret_cast<BYTE*>(&status),
+                                      sizeof(status),
+                                      &nbreq))
+            {
+                const auto ec = GetLastError();
+                throw std::system_error(ec, WinErrorCategory::get(), LIBSERVICE_ERROR_PREFIX);
+            }
+
+            return status;
+        }
+
+        DWORD query_service_state(const ServiceHandle& handle)
+        {
+            return query_service_status(handle).dwCurrentState;
+        }
+        
+        SERVICE_STATUS_PROCESS wait_for_service_state(
+            const ServiceHandle& handle,
+            const DWORD desired_state)
+        {
+            auto status = query_service_status(handle);
+
+            DWORD old_timestamp = GetTickCount();
+
+            DWORD old_check_point = status.dwCheckPoint;
+            DWORD old_wait_hint = status.dwWaitHint;
+
+            while (desired_state != status.dwCurrentState)
+            {
+                DWORD wait_time = old_wait_hint / 10;
+
+                if (wait_time < 1000)
+                    wait_time = 1000;
+                else if (wait_time > 10000)
+                    wait_time = 10000;
+
+                Sleep(wait_time);
+
+                status = query_service_status(handle);
+
+                if (desired_state == status.dwCurrentState)
+                    break;
+
+                if (status.dwCheckPoint > old_check_point)
+                {
+                    old_timestamp = GetTickCount();
+
+                    old_check_point = status.dwCheckPoint;
+                    old_wait_hint = status.dwWaitHint;
+                }
+                else if (GetTickCount() - old_timestamp > old_wait_hint)
+                {
+                    return status;
+                }
+            }
+            return status;
+        }
+    }
+
+    Service Service::open(const ServiceManager& mgr, const std::string& name)
+    {
+        return Service(open_service(mgr, name));
+    }
+
+    Service Service::install(const ServiceManager& mgr,
+                             const std::string& name,
+                             const std::string& bin_path)
+    {
+        return Service(install_service(mgr, name, bin_path));
+    }
+
+    void Service::start() const
+    {
+        const auto state = query_service_state(m_handle);
+
+        switch (state)
+        {
+            case SERVICE_STOPPED:
+                break;
+
+            case SERVICE_STOP_PENDING:
+                wait_for_service_state(m_handle, SERVICE_STOPPED);
+                break;
+
+            default:
+                return;
+        }
+
+        start_service(m_handle);
+        wait_for_service_state(m_handle, SERVICE_RUNNING);
+    }
+
+    void Service::stop() const
+    {
+        switch (query_service_state(m_handle))
+        {
+            case SERVICE_STOPPED:
+                return;
+
+            case SERVICE_STOP_PENDING:
+                wait_for_service_state(m_handle, SERVICE_STOPPED);
+                return;
+        }
+
+        stop_service(m_handle);
+        wait_for_service_state(m_handle, SERVICE_STOPPED);
+    }
+
+    void Service::uninstall() const
+    {
+        stop();
+        uninstall_service(m_handle);
+    }
+
+    void swap(Service& a, Service& b) LIBSERVICE_NOEXCEPT
+    {
+        a.swap(b);
+    }
+}
+
+namespace std
+{
+    template <>
+    void swap<libservice::Service>(
+        libservice::Service& a,
+        libservice::Service& b) LIBSERVICE_NOEXCEPT
+    {
+        a.swap(b);
+    }
+}
diff --git a/utils/libservice/src/service_handle.cpp b/utils/libservice/src/service_handle.cpp
new file mode 100644
index 0000000..5356b50
--- /dev/null
+++ b/utils/libservice/src/service_handle.cpp
@@ -0,0 +1,30 @@
+/**
+ * \author Egor Tensin <Egor.Tensin@gmail.com>
+ * \date 2015
+ * \copyright This file is licensed under the terms of the MIT License.
+ *            See LICENSE.txt for details.
+ */
+
+#include "libservice/common.hpp"
+#include "libservice/service_handle.hpp"
+
+#include <utility>
+
+namespace libservice
+{
+    void swap(ServiceHandle& a, ServiceHandle& b) LIBSERVICE_NOEXCEPT
+    {
+        a.swap(b);
+    }
+}
+
+namespace std
+{
+    template <>
+    void swap<libservice::ServiceHandle>(
+        libservice::ServiceHandle& a,
+        libservice::ServiceHandle& b) LIBSERVICE_NOEXCEPT
+    {
+        a.swap(b);
+    }
+}
diff --git a/utils/libservice/src/service_manager.cpp b/utils/libservice/src/service_manager.cpp
new file mode 100644
index 0000000..4888406
--- /dev/null
+++ b/utils/libservice/src/service_manager.cpp
@@ -0,0 +1,48 @@
+/**
+ * \author Egor Tensin <Egor.Tensin@gmail.com>
+ * \date 2015
+ * \copyright This file is licensed under the terms of the MIT License.
+ *            See LICENSE.txt for details.
+ */
+
+#include "libservice/common.hpp"
+#include "libservice/service_handle.hpp"
+#include "libservice/service_manager.hpp"
+#include "libservice/windows_error.hpp"
+
+#include <Windows.h>
+
+#include <system_error>
+#include <utility>
+
+namespace libservice
+{
+    ServiceManager ServiceManager::open()
+    {
+        SC_HANDLE raw = OpenSCManager(NULL, NULL, SC_MANAGER_ALL_ACCESS);
+
+        if (NULL == raw)
+        {
+            const auto ec = GetLastError();
+            throw std::system_error(ec, WinErrorCategory::get());
+        }
+
+        return ServiceManager(ServiceHandle(raw));
+    }
+
+    void swap(ServiceManager& a, ServiceManager& b) LIBSERVICE_NOEXCEPT
+    {
+        a.swap(b);
+    }
+}
+
+namespace std
+{
+    template <>
+    void swap<libservice::ServiceManager>(
+        libservice::ServiceManager& a,
+        libservice::ServiceManager& b) LIBSERVICE_NOEXCEPT
+    {
+        a.swap(b);
+    }
+}
diff --git a/utils/libservice/src/windows_error.cpp b/utils/libservice/src/windows_error.cpp
new file mode 100644
index 0000000..6cc7302
--- /dev/null
+++ b/utils/libservice/src/windows_error.cpp
@@ -0,0 +1,41 @@
+/**
+ * \author Egor Tensin <Egor.Tensin@gmail.com>
+ * \date 2015
+ * \copyright This file is licensed under the terms of the MIT License.
+ *            See LICENSE.txt for details.
+ */
+
+#include "libservice/windows_error.hpp"
+
+#include <Windows.h>
+
+#include <string>
+
+namespace libservice
+{
+    std::string WinErrorCategory::message(int code) const
+    {
+        char* buf_ptr;
+
+        DWORD written = FormatMessageA(
+            FORMAT_MESSAGE_ALLOCATE_BUFFER
+            | FORMAT_MESSAGE_FROM_SYSTEM
+            | FORMAT_MESSAGE_IGNORE_INSERTS,
+            NULL,
+            code,
+            MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
+            reinterpret_cast<char*>(&buf_ptr),
+            0,
+            NULL);
+
+        if (0 == written)
+        {
+            LocalFree(buf_ptr);
+            return "Couldn't format error message";
+        }
+
+        std::string str(buf_ptr, written - 2);
+        LocalFree(buf_ptr);
+        return str;
+    }
+}