mirror of
https://github.com/transmission/transmission
synced 2024-12-23 00:04:06 +00:00
1ee88c019f
* refactor: compile daemon/ and utils/ as C++ Co-authored-by: Mike Gelfand <mikedld@mikedld.com>
268 lines
6.9 KiB
C++
268 lines
6.9 KiB
C++
/*
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* This file Copyright (C) 2015 Mnemosyne LLC
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*
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* It may be used under the GNU GPL versions 2 or 3
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* or any future license endorsed by Mnemosyne LLC.
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*
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*/
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#include <process.h> /* _beginthreadex() */
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#include <windows.h>
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#include <libtransmission/transmission.h>
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#include <libtransmission/error.h>
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#include <libtransmission/log.h>
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#include <libtransmission/tr-macros.h>
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#include <libtransmission/utils.h>
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#include "daemon.h"
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/***
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****
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***/
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#ifndef SERVICE_ACCEPT_PRESHUTDOWN
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#define SERVICE_ACCEPT_PRESHUTDOWN 0x00000100
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#endif
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#ifndef SERVICE_CONTROL_PRESHUTDOWN
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#define SERVICE_CONTROL_PRESHUTDOWN 0x0000000F
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#endif
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static dtr_callbacks const* callbacks = NULL;
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static void* callback_arg = NULL;
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static LPCWSTR const service_name = L"TransmissionDaemon";
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static SERVICE_STATUS_HANDLE status_handle = NULL;
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static DWORD current_state = SERVICE_STOPPED;
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static HANDLE service_thread = NULL;
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static HANDLE service_stop_thread = NULL;
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/***
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****
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***/
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static void set_system_error(tr_error** error, DWORD code, char const* message)
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{
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char* const system_message = tr_win32_format_message(code);
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tr_error_set(error, code, "%s (0x%08lx): %s", message, code, system_message);
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tr_free(system_message);
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}
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static void do_log_system_error(char const* file, int line, tr_log_level level, DWORD code, char const* message)
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{
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char* const system_message = tr_win32_format_message(code);
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tr_logAddMessage(file, line, level, "[dtr_daemon] %s (0x%08lx): %s", message, code, system_message);
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tr_free(system_message);
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}
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#define log_system_error(level, code, message) \
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do \
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{ \
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DWORD const local_code = (code); \
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\
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if (tr_logLevelIsActive((level))) \
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{ \
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do_log_system_error(__FILE__, __LINE__, (level), local_code, (message)); \
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} \
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} while (0)
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/***
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****
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***/
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static BOOL WINAPI handle_console_ctrl(DWORD control_type)
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{
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TR_UNUSED(control_type);
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callbacks->on_stop(callback_arg);
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return TRUE;
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}
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static void update_service_status(
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DWORD new_state,
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DWORD win32_exit_code,
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DWORD service_specific_exit_code,
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DWORD check_point,
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DWORD wait_hint)
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{
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SERVICE_STATUS status;
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status.dwServiceType = SERVICE_WIN32_OWN_PROCESS;
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status.dwCurrentState = new_state;
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status.dwControlsAccepted = new_state != SERVICE_RUNNING ?
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0 :
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SERVICE_ACCEPT_PRESHUTDOWN | SERVICE_ACCEPT_SHUTDOWN | SERVICE_ACCEPT_STOP | SERVICE_ACCEPT_PARAMCHANGE;
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status.dwWin32ExitCode = service_specific_exit_code == 0 ? win32_exit_code : ERROR_SERVICE_SPECIFIC_ERROR;
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status.dwServiceSpecificExitCode = service_specific_exit_code;
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status.dwCheckPoint = check_point;
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status.dwWaitHint = wait_hint;
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if (SetServiceStatus(status_handle, &status))
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{
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current_state = new_state;
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}
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else
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{
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log_system_error(TR_LOG_DEBUG, GetLastError(), "SetServiceStatus() failed");
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}
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}
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#define TR_MAX(a, b) (((a) > (b)) ? (a) : (b))
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static unsigned int __stdcall service_stop_thread_main(void* param)
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{
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callbacks->on_stop(callback_arg);
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DWORD const sleep_time = 500;
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DWORD wait_time = (DWORD)(UINT_PTR)param;
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for (DWORD checkpoint = 2; WaitForSingleObject(service_thread, sleep_time) == WAIT_TIMEOUT; ++checkpoint)
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{
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wait_time = wait_time >= sleep_time ? wait_time - sleep_time : 0;
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update_service_status(SERVICE_STOP_PENDING, NO_ERROR, 0, checkpoint, TR_MAX(wait_time, sleep_time * 2));
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}
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return 0;
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}
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static void stop_service(void)
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{
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if (service_stop_thread != NULL)
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{
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return;
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}
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DWORD const wait_time = 30 * 1000;
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update_service_status(SERVICE_STOP_PENDING, NO_ERROR, 0, 1, wait_time);
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service_stop_thread = (HANDLE)_beginthreadex(NULL, 0, &service_stop_thread_main, (LPVOID)(UINT_PTR)wait_time, 0, NULL);
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if (service_stop_thread == NULL)
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{
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log_system_error(TR_LOG_DEBUG, GetLastError(), "_beginthreadex() failed, trying to stop synchronously");
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service_stop_thread_main((LPVOID)(UINT_PTR)wait_time);
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}
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}
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static DWORD WINAPI handle_service_ctrl(DWORD control_code, DWORD event_type, LPVOID event_data, LPVOID context)
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{
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TR_UNUSED(event_type);
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TR_UNUSED(event_data);
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TR_UNUSED(context);
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switch (control_code)
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{
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case SERVICE_CONTROL_PRESHUTDOWN:
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case SERVICE_CONTROL_SHUTDOWN:
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case SERVICE_CONTROL_STOP:
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stop_service();
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return NO_ERROR;
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case SERVICE_CONTROL_PARAMCHANGE:
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callbacks->on_reconfigure(callback_arg);
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return NO_ERROR;
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case SERVICE_CONTROL_INTERROGATE:
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update_service_status(current_state, NO_ERROR, 0, 0, 0);
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return NO_ERROR;
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}
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return ERROR_CALL_NOT_IMPLEMENTED;
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}
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static unsigned int __stdcall service_thread_main(void* context)
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{
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TR_UNUSED(context);
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return callbacks->on_start(callback_arg, false);
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}
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static VOID WINAPI service_main(DWORD argc, LPWSTR* argv)
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{
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TR_UNUSED(argc);
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TR_UNUSED(argv);
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status_handle = RegisterServiceCtrlHandlerExW(service_name, &handle_service_ctrl, NULL);
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if (status_handle == NULL)
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{
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log_system_error(TR_LOG_ERROR, GetLastError(), "RegisterServiceCtrlHandlerEx() failed");
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return;
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}
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update_service_status(SERVICE_START_PENDING, NO_ERROR, 0, 1, 1000);
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service_thread = (HANDLE)_beginthreadex(NULL, 0, &service_thread_main, NULL, 0, NULL);
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if (service_thread == NULL)
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{
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log_system_error(TR_LOG_ERROR, GetLastError(), "_beginthreadex() failed");
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return;
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}
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update_service_status(SERVICE_RUNNING, NO_ERROR, 0, 0, 0);
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if (WaitForSingleObject(service_thread, INFINITE) != WAIT_OBJECT_0)
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{
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log_system_error(TR_LOG_ERROR, GetLastError(), "WaitForSingleObject() failed");
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}
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if (service_stop_thread != NULL)
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{
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WaitForSingleObject(service_stop_thread, INFINITE);
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CloseHandle(service_stop_thread);
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}
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DWORD exit_code;
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if (!GetExitCodeThread(service_thread, &exit_code))
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{
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exit_code = 1;
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}
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CloseHandle(service_thread);
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update_service_status(SERVICE_STOPPED, NO_ERROR, exit_code, 0, 0);
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}
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/***
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****
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***/
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bool dtr_daemon(dtr_callbacks const* cb, void* cb_arg, bool foreground, int* exit_code, tr_error** error)
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{
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callbacks = cb;
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callback_arg = cb_arg;
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*exit_code = 1;
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if (foreground)
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{
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if (!SetConsoleCtrlHandler(&handle_console_ctrl, TRUE))
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{
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set_system_error(error, GetLastError(), "SetConsoleCtrlHandler() failed");
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return false;
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}
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*exit_code = cb->on_start(cb_arg, true);
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}
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else
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{
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SERVICE_TABLE_ENTRY const service_table[] = {
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{ (LPWSTR)service_name, &service_main },
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{ NULL, NULL },
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};
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if (!StartServiceCtrlDispatcherW(service_table))
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{
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set_system_error(error, GetLastError(), "StartServiceCtrlDispatcher() failed");
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return false;
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}
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*exit_code = 0;
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}
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return true;
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}
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