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winsvc.c
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winsvc.c
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#include <windows.h>
#include <tcl.h>
#include "tclsvcmsg.h"
static VOID WINAPI SvcMain ( DWORD, LPTSTR * );
static VOID WINAPI SvcCtrlHandler ( DWORD );
VOID SvcSetStatus ( DWORD, DWORD );
VOID SvcReport ( DWORD, LPTSTR, ... );
void StartAndRunTclService ( char const * );
void TclService_NotifyStopRequested ();
static SERVICE_STATUS ServiceStatus;
static SERVICE_STATUS_HANDLE hServiceStatus;
//----------------------------------------------------------------------
//
// _tmain:
// Entry point for the process
//
//----------------------------------------------------------------------
int main ( int argc, char *argv[] )
{
SERVICE_TABLE_ENTRY dispatchTable[] = {
{ "TCLSvc", SvcMain },
{ NULL, NULL }
};
if( !StartServiceCtrlDispatcher( dispatchTable ) ) {
puts( "This program should be run as a service." );
}
return 0;
}
//----------------------------------------------------------------------
//
// SvcMain:
// Entry point for the service
//
// Parameters:
// argc - Number of arguments in the lpszArgv array
// argv - Array of strings. The first string is the name of
// the service and subsequent strings are passed by the process
// that called the StartService function to start the service.
//
//----------------------------------------------------------------------
static VOID WINAPI SvcMain ( DWORD argc, LPTSTR *argv )
{
hServiceStatus = RegisterServiceCtrlHandler( argv[0], SvcCtrlHandler );
if( !hServiceStatus ) {
SvcReport( EVENTLOG_ERROR_TYPE, "cannot register service handle" );
return;
}
// These SERVICE_STATUS members remain as set here
//
ServiceStatus.dwServiceType = SERVICE_WIN32_OWN_PROCESS;
ServiceStatus.dwServiceSpecificExitCode = 0;
SvcSetStatus( SERVICE_START_PENDING, 3000 );
StartAndRunTclService( argv[0] );
SvcSetStatus( SERVICE_STOPPED, 0 );
}
//----------------------------------------------------------------------
//
// SvcCtrlHandler:
// Called by SCM whenever a control code is sent to the service
// using the ControlService function.
//
// Parameters:
// ctrlCode - control code
//
//----------------------------------------------------------------------
static VOID WINAPI SvcCtrlHandler( DWORD ctrlCode )
{
switch( ctrlCode ) {
case SERVICE_CONTROL_SHUTDOWN:
case SERVICE_CONTROL_STOP:
SvcSetStatus( SERVICE_STOP_PENDING, 5000 );
TclService_NotifyStopRequested();
break;
case SERVICE_CONTROL_INTERROGATE:
SvcSetStatus( ServiceStatus.dwCurrentState, 0 );
break;
default:
break;
}
}
//----------------------------------------------------------------------
//
// SvcSetStatus:
// Sets the current service status and reports it to the SCM.
//
// Parameters:
// dwCurrentState - The current state (see SERVICE_STATUS)
// dwWaitHint - Estimated time for pending operation, in milliseconds
//
//----------------------------------------------------------------------
VOID SvcSetStatus( DWORD dwCurrentState, DWORD dwWaitHint )
{
ServiceStatus.dwCurrentState = dwCurrentState;
ServiceStatus.dwWaitHint = dwWaitHint;
ServiceStatus.dwWin32ExitCode = NO_ERROR;
if ( dwCurrentState == SERVICE_START_PENDING || dwCurrentState == SERVICE_STOP_PENDING ) {
ServiceStatus.dwControlsAccepted = 0;
} else {
ServiceStatus.dwControlsAccepted = SERVICE_ACCEPT_STOP | SERVICE_ACCEPT_SHUTDOWN;
}
if ( dwCurrentState == SERVICE_RUNNING || dwCurrentState == SERVICE_STOPPED ) {
ServiceStatus.dwCheckPoint = 0;
} else {
ServiceStatus.dwCheckPoint++;
}
SetServiceStatus( hServiceStatus, &ServiceStatus );
}
//----------------------------------------------------------------------
//
// SvcReport:
// Logs messages to the event log
//
// Parameters:
// type - one of the EVENTLOG_*_TYPE constants
// message - text to be added to the log
//
//----------------------------------------------------------------------
VOID SvcReport( DWORD type, LPTSTR message, ... )
{
HANDLE hEventSource = RegisterEventSource( NULL, "TCLSvc" );
if( hEventSource != NULL ) {
va_list msgArgs;
char txtbuf[BUFSIZ];
LPCTSTR args[1];
DWORD argc = 0;
va_start( msgArgs, message );
vsprintf( txtbuf, message, msgArgs );
args[argc++] = txtbuf;
DWORD eventId =
type == EVENTLOG_ERROR_TYPE ? SVC_ERROR :
type == EVENTLOG_WARNING_TYPE ? SVC_WARN : SVC_INFO ;
ReportEvent( hEventSource // event log handle
, type // event type
, 0 // event category
, eventId // event identifier
, NULL // no security identifier
, argc // size of args array
, 0 // no binary data
, args // array of strings
, NULL ); // no binary data
DeregisterEventSource( hEventSource );
va_end( msgArgs );
}
}