transmission/daemon/daemon-win32.c

275 lines
7.0 KiB
C

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