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root/win-scm.c @ 8d5aad54

e592f8f7 Hamish Coleman
/*
* win-scm.c - windows service control manager functions
*
* Copyright (c) 2008 Hamish Coleman <hamish@zot.org>
* 2003 Benjamin Schweizer <gopher at h07 dot org>
* 1998 Stephen Early <Stephen.Early@cl.cam.ac.uk>
*
*
* 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., 675 Mass Ave, Cambridge, MA 02139, USA.
*/

#include <windows.h>
#include <winsvc.h>
#include <stdio.h>
#include <stdlib.h>

#include "scm.h"

/* Service status: our current status, and handle on service manager */
SERVICE_STATUS svcStatus;
SERVICE_STATUS_HANDLE svcHandle;

/* global pointer to our service definition */
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struct SCM_def *global_sd;
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VOID WINAPI ServiceCtrlHandler(DWORD opcode) {
svcStatus.dwWin32ExitCode = NO_ERROR;
if (opcode == SERVICE_CONTROL_STOP) {
svcStatus.dwCurrentState = SERVICE_STOP_PENDING;
SetServiceStatus( svcHandle, &svcStatus );
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global_sd->stop(0);
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return;
}
SetServiceStatus( svcHandle, &svcStatus );
}

VOID WINAPI ServiceMain(DWORD argc, LPSTR *argv)
{
int err;
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struct SCM_def *sd = global_sd;
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svcHandle = RegisterServiceCtrlHandler(sd->name,ServiceCtrlHandler);
if (!svcHandle) {
/* FIXME - use SvcReportEvent() */
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printf("RegisterServiceCtrlHandler failed %d\n", GetLastError());
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return;
}

svcStatus.dwServiceType = SERVICE_WIN32_OWN_PROCESS;
svcStatus.dwCurrentState = 0;
svcStatus.dwControlsAccepted = SERVICE_ACCEPT_STOP;
svcStatus.dwWin32ExitCode = NO_ERROR;
svcStatus.dwServiceSpecificExitCode = 0;
svcStatus.dwCheckPoint = 0;
svcStatus.dwWaitHint = 5000;

/* Report initial status to the SCM. */
svcStatus.dwCurrentState = SERVICE_START_PENDING;
SetServiceStatus( svcHandle, &svcStatus );

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sd->mode=SVC_OK;
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if ((err=sd->init(argc,argv))!=0) {
svcStatus.dwCurrentState = SERVICE_STOPPED;
svcStatus.dwWin32ExitCode = err;
SetServiceStatus( svcHandle, &svcStatus );
return;
}

svcStatus.dwCurrentState = SERVICE_RUNNING;
svcStatus.dwWin32ExitCode = NO_ERROR;
SetServiceStatus( svcHandle, &svcStatus );

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err=sd->main(0);
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svcStatus.dwCurrentState = SERVICE_STOPPED;
svcStatus.dwWin32ExitCode = NO_ERROR;
SetServiceStatus( svcHandle, &svcStatus );
return;
}

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int SCM_Start_Console(int argc, char **argv) {
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global_sd->mode=SVC_CONSOLE;
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int err = global_sd->init(argc,argv);
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if (err!=0) {
return SVC_FAIL;
}

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global_sd->main(0);
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return SVC_OK;
}

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int SCM_Start(struct SCM_def *sd, int argc, char **argv) {
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SERVICE_TABLE_ENTRY ServiceTable[] = {
{ "", ServiceMain },
{ NULL, NULL }
};

global_sd = sd;

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/* If we have commandline args, then we cannot have been started
* by the Windows SCM
*/
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if (argc>1) {
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return SCM_Start_Console(argc,argv);
}

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/* try to run as a service */
if (StartServiceCtrlDispatcher(ServiceTable)==0) {
int err = GetLastError();

if (err == ERROR_FAILED_SERVICE_CONTROLLER_CONNECT) {
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return SCM_Start_Console(argc,argv);
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}

/* any other error, assume fatal */
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printf("StartServiceCtrlDispatcher failed %d\n", err);
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return SVC_FAIL;
}
return SVC_OK;
}

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char *SCM_Install(struct SCM_def *sd) {
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SC_HANDLE schSCManager, schService;

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static char path[MAX_PATH];
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if( !GetModuleFileName( NULL, path, MAX_PATH ) ) {
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printf("GetModuleFileName failed %d\n", GetLastError());
return NULL;
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}

schSCManager = OpenSCManager(NULL, NULL, SC_MANAGER_ALL_ACCESS);

schService = CreateService(
schSCManager,
sd->name,
sd->desc,
SERVICE_ALL_ACCESS,
SERVICE_WIN32_OWN_PROCESS,
SERVICE_AUTO_START,
SERVICE_ERROR_NORMAL,
path,
NULL, NULL, NULL, NULL, NULL);

if (schService == NULL) {
printf("CreateService failed\n");
CloseServiceHandle(schService);
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return NULL;
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}
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CloseServiceHandle(schService);
return (char *)&path;
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}

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int SCM_Remove(struct SCM_def *sd) {
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SC_HANDLE schSCManager, schService;

schSCManager = OpenSCManager(NULL, NULL, SC_MANAGER_ALL_ACCESS);
if (schSCManager == NULL) {
printf("Couldn't open service manager\n");
return -1;
}

schService = OpenService(schSCManager, sd->name, DELETE);
if (schService == NULL) {
printf("Couldn't open %s service\n",sd->name);
return -1;
}

if (!DeleteService(schService)) {
printf("Couldn't delete %s service\n",sd->name);
return -1;
}

CloseServiceHandle(schService);
return 0;
}