Windows Background Service program example

// Main function of the service program. # Include <stdio. h> // # include "stdafx. H "# include <windows. h> # include <iostream> # define szappname "serversample" // service program name # define szservicename "servicesample" // identifies the internal name of the service/internal variable bool bdebugserver = false; service_status ssstatus; service_status_handle sshstatushandle; DWORD dwerr = 0; tchar szerr [256]; // The following functions are implemented by void winapi service_main (DWORD dwargc, lptstr * lpszargv ); void winapi service_ctrl (DWORD dwctrlcode ); Void installservice (); void removeservice (); void debugservice (INT argc, char ** argv); bool reportstatustoscmgr (DWORD dwcurrentstate, DWORD dwwin32exitcode, DWORD dwwaithint ); void addtomessagelog (lptstr lpszmsg); void servicestop (); void servicepause (); void servicecontinue (); int main (INT argc, char * argv []) {service_table_entry dispatchtable [] = {text (szservicename), (lpservice_main_function) service_mai N },{ null, null }}; if (argc> 1) & (* argv [1] = '-') | (argv [1] = "/") {If (_ stricmp ("Install", argv [1] + 1) = 0) {installservice ();} else if (_ stricmp ("Remove", argv [1] + 1) = 0) {removeservice ();} else if (_ stricmp ("debug", argv [1] + 1) = 0) {bdebugserver = true; debugservice (argc, argv );} else {// If the parameter does not match the above, it may be the Service Control Manager to start the program. Call the // startservicectrldispatcher function immediately. Printf ("% s-install to install the service/N", szappname); printf ("% s-remove to remove the service/N", szappname ); printf ("% s-Debug to debug the service/N", szappname); printf ("/n startservicectrldispatcher being called. /n "); printf (" This may take several seconds. please wait. /n "); If (! Startservicectrldispatcher (dispatchtable) addtomessagelog (text ("startservicectrldispatcher failed. "); else addtomessagelog (text (" startservicectrldispatcher OK. ");} exit (0);} return 0;} // void servicestart (DWORD dwargc, lptstr * lpszargv ); // The initialization entry function void winapi service_main (DWORD dwargc, lptstr * lpszargv) {// register the Service Control Handler function sshstatushandle = registerservicectrlhandler (text (szservicename), Servic E_ctrl); // if the registration fails if (! Sshstatushandle) {goto cleanup; return;} // initialize the ssstatus. dwservicetype = service_win32_own_process; ssstatus. dwservicespecificexitcode = 0; // update the service status if (! Reportstatustoscmgr (service_start_pending, // service status, the service is starting. no_error, // exit code 3000) // wait time goto cleanup; // if the service status fails to be updated, turn to cleanup servicestart (dwargc, lpszargv); return; cleanup: // update the service status to service_stopped and exit. If (sshstatushandle) (void) reportstatustoscmgr (service_stopped, dwerr, 0);} void winapi service_ctrl (DWORD dwctrlcode) {// process control request code switch (dwctrlcode) {// update the service status to servicde_stop_pending before stopping the service. Case service_control_stop: invoke (service_stop_pending, no_error, 500); servicestop (); // return is implemented by a specific service program; // stop the service case service_control_pause: reportstatustoscmgr (service_stop_pending, no_error, 500); servicepause (); // ssstatus is implemented by a specific service program. dwcurrentstate = service_paused; return; // continue service case service_control_continue: reportstatustoscmgr (service_stop_pending, no_error, 500); servicecontinue (); // The ssstatus is implemented by a specific service program. dwcurrentstate = service_running; return; // update the service status case service_control_interrogate: break; // invalid control code default: break;} reportstatustoscmgr (ssstatus. dwcurrentstate, no_error, 0) ;}// install the void installservice () {SC _handle schservice; SC _handle schscmanager; tchar szpath [512]; // obtain the path of the program Disk File // a handle to the loaded module whose path is being requested. if this parameter is null, // get Modulefilename retrieves the path of the executable file of the current process. if (getmodulefilename (null, szpath, 512) = 0) {/* _ tprintf (text ("unable to install % s-% s/n "), text (szappname), getlasterror (); // @ 1 get the last error code returned by the call function */printf ("unable to install % s-% s/n", szappname, getlasterror (); return;} // open the service management database schscmanager = openscmanager (null, // if it is null, it refers to the local computer null, // default database SC _manager_all _ Access // requires all access permissions); If (schscmanager) {// register the service program schservice = createservice (schscmanager, // The service management database handle text (szservicename ), // service name text (szappname), // used to display the service_all_access identifier of the service, // response to all access requests service_win32_own_process, // service_deman_start of the service type, // service_error_normal of the Startup type, // error control type szpath, // service program disk file path null, // service does not belong to any group null, // No tag identifier null, // start the service or service group on which the service depends. Here, it is just an empty string null, // LocalSystem account nu Ll); If (schservice) {/* _ tprintf (text ("% s installed./N"), text (szappname); */printf ("the service created! \ N "); printf (" % s installed. /n ", szappname); closeservicehandle (schservice);} else {/* _ tprintf (text (" createservice failed-% s/n "), getlasterror ()); */printf ("createservice failed-% s/n", getlasterror ();} closeservicehandle (schscmanager);} else printf ("openscmanager failed-% s/n ", getlasterror (); // _ tprintf (text ("openscmanager failed-% s/n"), getlasterror ());} // stop and delete the installed Service Program void removeservice () {SC _handle schservice; SC _handle schscmanager; // open the service management database schscmanager = openscmanager (null, // null on the local computer, // The default database SC _manager_all_access // requires all access permissions); If (schscmanager) {// get the service program handle schservice = openservice (schscmanager, // service management database handle text (szservicename), // service name service_all_access // responds to all access requests); If (schservice) {// try to stop the service send a control code to the service; if (controlservice (schservice, // service program handle (obtained from opening the service above) service_control_stop, // stop Service Request Code & ssstatus // receives the final service status information) {/* _ tprintf (text ("Stopping % S. "), text (szappname); */printf (" Stopping % S. ", szappname); sleep (1000); // wait for the service to stop // while (queryservicestatus (schservice, & ssstatus) {If (service_stop_pending = ssstatus. dwcurrentstate) {// _ tprintf (text (". "); printf (". "); sleep (1000);} else break;} If (service_stopped = ssstatus. dwcurrentstate) printf ("/n % s stopped. /n ", szappname); // _ tprintf (text ("/n % s stopped. /n "), text (szappname); else printf ("/n % s failed to stopp. /n ", szappname); // _ tprintf (text ("/n % s failed to stopp. /n "), text (szappname);} // Delete the installed Service Program install if (deleteservice (schservice) printf (" % s removed. /n ", szappname); // _ tprintf (text (" % s removed. /n "), text (szappname); else // _ tprintf (text (" deleteservice failed-% S. /n "), getlasterror (); printf (" deleteservice failed-% S. /n ", getlasterror (); closeservicehandle (schservice);} else printf (" openservice failed-% s/n ", getlasterror ()); // _ tprintf (text ("openservice failed-% s/n"), getlasterror (); closeservicehandle (schscmanager );} else printf ("openscmanager failed-% s/n", getlasterror (); // _ tprintf (text ("openscmanager failed-% s/n "), getlasterror ();} void servicestop () {} void servicepause () {} void servicecontinue () {} void debugservice (INT argc, char ** argv) {printf ("debuging service... \ n ");} void addtomessagelog (lptstr lpszmsg) {}// void servicestart (DWORD dwargc, lptstr * lpszargv) // The initialization entry function {} bool reportstatustoscmgr (DWORD dwcurrentstate, DWORD dwwin32exitcode, DWORD dwwaithint) {return true ;}

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