ntservice.c
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上传日期:2009-03-27
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文件大小:12k
- /*****************************************************************************
- * ntservice.c: Windows NT/2K/XP service interface
- *****************************************************************************
- * Copyright (C) 2004 VideoLAN
- * $Id: ntservice.c 9028 2004-10-21 14:33:27Z gbazin $
- *
- * Authors: Gildas Bazin <gbazin@videolan.org>
- *
- * 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 2 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, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
- *****************************************************************************/
- /*****************************************************************************
- * Preamble
- *****************************************************************************/
- #include <stdlib.h>
- #include <vlc/vlc.h>
- #include <vlc/intf.h>
- #define VLCSERVICENAME "VLC media player"
- /*****************************************************************************
- * Module descriptor
- *****************************************************************************/
- static int Activate( vlc_object_t * );
- static void Close ( vlc_object_t * );
- #define INSTALL_TEXT N_( "Install Windows Service" )
- #define INSTALL_LONGTEXT N_(
- "If enabled the interface will install the Service and exit." )
- #define UNINSTALL_TEXT N_( "Uninstall Windows Service" )
- #define UNINSTALL_LONGTEXT N_(
- "If enabled the interface will uninstall the Service and exit." )
- #define NAME_TEXT N_( "Display name of the Service" )
- #define NAME_LONGTEXT N_(
- "This allows you to change the display name of the Service." )
- #define OPTIONS_TEXT N_("Configuration options")
- #define OPTIONS_LONGTEXT N_(
- "This option allows you to specify configuration options that will be "
- "used by the Service (eg. --foo=bar --no-foobar). It should be specified "
- "at install time so the Service is properly configured.")
- #define EXTRAINTF_TEXT N_("Extra interface modules")
- #define EXTRAINTF_LONGTEXT N_(
- "This option allows you to select additional interfaces spawned by the "
- "Service. It should be specified at install time so the Service is "
- "properly configured. Use a comma separated list of interface modules. "
- "(common values are: logger, sap, rc, http)")
- vlc_module_begin();
- set_description( _("Windows Service interface") );
- add_bool( "ntservice-install", 0, NULL,
- INSTALL_TEXT, INSTALL_LONGTEXT, VLC_TRUE );
- add_bool( "ntservice-uninstall", 0, NULL,
- UNINSTALL_TEXT, UNINSTALL_LONGTEXT, VLC_TRUE );
- add_string ( "ntservice-name", VLCSERVICENAME, NULL,
- NAME_TEXT, NAME_LONGTEXT, VLC_TRUE );
- add_string ( "ntservice-options", NULL, NULL,
- OPTIONS_TEXT, OPTIONS_LONGTEXT, VLC_TRUE );
- add_string ( "ntservice-extraintf", NULL, NULL,
- EXTRAINTF_TEXT, EXTRAINTF_LONGTEXT, VLC_TRUE );
- set_capability( "interface", 0 );
- set_callbacks( Activate, Close );
- vlc_module_end();
- struct intf_sys_t
- {
- SERVICE_STATUS_HANDLE hStatus;
- SERVICE_STATUS status;
- char *psz_service;
- };
- /*****************************************************************************
- * Local prototypes
- *****************************************************************************/
- static void Run( intf_thread_t *p_intf );
- static int NTServiceInstall( intf_thread_t *p_intf );
- static int NTServiceUninstall( intf_thread_t *p_intf );
- static void WINAPI ServiceDispatch( DWORD numArgs, char **args );
- static void WINAPI ServiceCtrlHandler( DWORD control );
- /* We need this global */
- static intf_thread_t *p_global_intf;
- /*****************************************************************************
- * Activate: initialize and create stuff
- *****************************************************************************/
- static int Activate( vlc_object_t *p_this )
- {
- intf_thread_t *p_intf = (intf_thread_t*)p_this;
- /* Only works on NT/2K/XP */
- if( !IS_WINNT ) return VLC_EGENERIC;
- p_intf->pf_run = Run;
- return VLC_SUCCESS;
- }
- /*****************************************************************************
- * Close: destroy interface
- *****************************************************************************/
- void Close( vlc_object_t *p_this )
- {
- }
- /*****************************************************************************
- * Run: interface thread
- *****************************************************************************/
- static void Run( intf_thread_t *p_intf )
- {
- intf_thread_t *p_extraintf;
- SERVICE_TABLE_ENTRY dispatchTable[] =
- {
- { VLCSERVICENAME, &ServiceDispatch },
- { NULL, NULL }
- };
- p_global_intf = p_intf;
- p_intf->p_sys = alloca( sizeof( intf_sys_t ) );
- p_intf->p_sys->psz_service = config_GetPsz( p_intf, "ntservice-name" );
- p_intf->p_sys->psz_service = p_intf->p_sys->psz_service ?
- p_intf->p_sys->psz_service : strdup(VLCSERVICENAME);
- if( config_GetInt( p_intf, "ntservice-install" ) )
- {
- NTServiceInstall( p_intf );
- return;
- }
- if( config_GetInt( p_intf, "ntservice-uninstall" ) )
- {
- NTServiceUninstall( p_intf );
- return;
- }
- if( StartServiceCtrlDispatcher( dispatchTable ) == 0 )
- {
- msg_Err( p_intf, "StartServiceCtrlDispatcher failed" );
- }
- free( p_intf->p_sys->psz_service );
- /* Stop and destroy the interfaces we spawned */
- while( (p_extraintf = vlc_object_find(p_intf, VLC_OBJECT_INTF, FIND_CHILD)))
- {
- intf_StopThread( p_extraintf );
- vlc_object_detach( p_extraintf );
- vlc_object_release( p_extraintf );
- intf_Destroy( p_extraintf );
- }
- /* Make sure we exit (In case other interfaces have been spawned) */
- p_intf->p_vlc->b_die = VLC_TRUE;
- }
- /*****************************************************************************
- * NT Service utility functions
- *****************************************************************************/
- static int NTServiceInstall( intf_thread_t *p_intf )
- {
- intf_sys_t *p_sys = p_intf->p_sys;
- char psz_path[10*MAX_PATH], psz_pathtmp[MAX_PATH], *psz_extra;
- SC_HANDLE handle = OpenSCManager( NULL, NULL, SC_MANAGER_ALL_ACCESS );
- if( handle == NULL )
- {
- msg_Err( p_intf, "could not connect to SCM database" );
- return VLC_EGENERIC;
- }
- /* Find out the filename of ourselves so we can install it to the
- * service control manager */
- GetModuleFileName( NULL, psz_pathtmp, MAX_PATH );
- sprintf( psz_path, ""%s" -I "MODULE_STRING, psz_pathtmp );
- psz_extra = config_GetPsz( p_intf, "ntservice-extraintf" );
- if( psz_extra && *psz_extra )
- {
- strcat( psz_path, " --ntservice-extraintf " );
- strcat( psz_path, psz_extra );
- }
- if( psz_extra ) free( psz_extra );
- psz_extra = config_GetPsz( p_intf, "ntservice-options" );
- if( psz_extra && *psz_extra )
- {
- strcat( psz_path, " " );
- strcat( psz_path, psz_extra );
- }
- if( psz_extra ) free( psz_extra );
- SC_HANDLE service =
- CreateService( handle, p_sys->psz_service, p_sys->psz_service,
- GENERIC_READ | GENERIC_EXECUTE,
- SERVICE_WIN32_OWN_PROCESS,
- SERVICE_AUTO_START, SERVICE_ERROR_IGNORE,
- psz_path, NULL, NULL, NULL, NULL, NULL );
- if( service == NULL )
- {
- if( GetLastError() != ERROR_SERVICE_EXISTS )
- {
- msg_Err( p_intf, "could not create new service: "%s" (%s)",
- p_sys->psz_service ,psz_path );
- CloseServiceHandle( handle );
- return VLC_EGENERIC;
- }
- else
- {
- msg_Warn( p_intf, "service "%s" already exists",
- p_sys->psz_service );
- }
- }
- else
- {
- msg_Warn( p_intf, "service successfuly created" );
- }
- if( service ) CloseServiceHandle( service );
- CloseServiceHandle( handle );
- return VLC_SUCCESS;
- }
- static int NTServiceUninstall( intf_thread_t *p_intf )
- {
- intf_sys_t *p_sys = p_intf->p_sys;
- SC_HANDLE handle = OpenSCManager( NULL, NULL, SC_MANAGER_ALL_ACCESS );
- if( handle == NULL )
- {
- msg_Err( p_intf, "could not connect to SCM database" );
- return VLC_EGENERIC;
- }
- /* First, open a handle to the service */
- SC_HANDLE service = OpenService( handle, p_sys->psz_service, DELETE );
- if( service == NULL )
- {
- msg_Err( p_intf, "could not open service" );
- CloseServiceHandle( handle );
- return VLC_EGENERIC;
- }
- /* Remove the service */
- if( !DeleteService( service ) )
- {
- msg_Err( p_intf, "could not delete service "%s"",
- p_sys->psz_service );
- }
- else
- {
- msg_Dbg( p_intf, "service deleted successfuly" );
- }
- CloseServiceHandle( service );
- CloseServiceHandle( handle );
- return VLC_SUCCESS;
- }
- static void WINAPI ServiceDispatch( DWORD numArgs, char **args )
- {
- intf_thread_t *p_intf = (intf_thread_t *)p_global_intf;
- intf_sys_t *p_sys = p_intf->p_sys;
- char *psz_modules, *psz_parser;
- /* We have to initialize the service-specific stuff */
- memset( &p_sys->status, 0, sizeof(SERVICE_STATUS) );
- p_sys->status.dwServiceType = SERVICE_WIN32;
- p_sys->status.dwCurrentState = SERVICE_START_PENDING;
- p_sys->status.dwControlsAccepted = SERVICE_ACCEPT_STOP;
- p_sys->hStatus =
- RegisterServiceCtrlHandler( p_sys->psz_service, &ServiceCtrlHandler );
- if( p_sys->hStatus == (SERVICE_STATUS_HANDLE)0 )
- {
- msg_Err( p_intf, "failed to register service control handler" );
- return;
- }
- /*
- * Load background interfaces
- */
- psz_modules = config_GetPsz( p_intf, "ntservice-extraintf" );
- psz_parser = psz_modules;
- while( psz_parser && *psz_parser )
- {
- char *psz_module, *psz_temp;
- psz_module = psz_parser;
- psz_parser = strchr( psz_module, ',' );
- if( psz_parser )
- {
- *psz_parser = ' ';
- psz_parser++;
- }
- psz_temp = (char *)malloc( strlen(psz_module) + sizeof(",none") );
- if( psz_temp )
- {
- intf_thread_t *p_new_intf;
- sprintf( psz_temp, "%s,none", psz_module );
- /* Try to create the interface */
- p_new_intf = intf_Create( p_intf, psz_temp );
- if( p_new_intf == NULL )
- {
- msg_Err( p_intf, "interface "%s" initialization failed",
- psz_temp );
- free( psz_temp );
- continue;
- }
- /* Try to run the interface */
- p_new_intf->b_block = VLC_FALSE;
- if( intf_RunThread( p_new_intf ) )
- {
- vlc_object_detach( p_new_intf );
- intf_Destroy( p_new_intf );
- msg_Err( p_intf, "interface "%s" cannot run", psz_temp );
- }
- free( psz_temp );
- }
- }
- if( psz_modules )
- {
- free( psz_modules );
- }
- /* Initialization complete - report running status */
- p_sys->status.dwCurrentState = SERVICE_RUNNING;
- p_sys->status.dwCheckPoint = 0;
- p_sys->status.dwWaitHint = 0;
- SetServiceStatus( p_sys->hStatus, &p_sys->status );
- }
- static void WINAPI ServiceCtrlHandler( DWORD control )
- {
- intf_thread_t *p_intf = (intf_thread_t *)p_global_intf;
- intf_sys_t *p_sys = p_intf->p_sys;
- switch( control )
- {
- case SERVICE_CONTROL_SHUTDOWN:
- case SERVICE_CONTROL_STOP:
- p_sys->status.dwCurrentState = SERVICE_STOPPED;
- p_sys->status.dwWin32ExitCode = 0;
- p_sys->status.dwCheckPoint = 0;
- p_sys->status.dwWaitHint = 0;
- break;
- case SERVICE_CONTROL_INTERROGATE:
- /* just set the current state to whatever it is... */
- break;
- }
- SetServiceStatus( p_sys->hStatus, &p_sys->status );
- }