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/*
** Zabbix
** Copyright (C) 2001-2014 Zabbix SIA
**
** 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
**/
#include "common.h"
#include "service.h"
#include "cfg.h"
#include "log.h"
#include "alias.h"
#include "zbxconf.h"
#include "perfmon.h"
#define EVENTLOG_REG_PATH TEXT("SYSTEM\\CurrentControlSet\\Services\\EventLog\\")
static SERVICE_STATUS serviceStatus;
static SERVICE_STATUS_HANDLE serviceHandle;
int application_status = ZBX_APP_RUNNING;
/* free resources allocated by MAIN_ZABBIX_ENTRY() */
void zbx_free_service_resources();
static void parent_signal_handler(int sig)
{
switch (sig)
{
case SIGINT:
case SIGTERM:
ZBX_DO_EXIT();
zabbix_log(LOG_LEVEL_INFORMATION, "Got signal. Exiting ...");
zbx_on_exit();
break;
}
}
static VOID WINAPI ServiceCtrlHandler(DWORD ctrlCode)
{
serviceStatus.dwServiceType = SERVICE_WIN32_OWN_PROCESS;
serviceStatus.dwCurrentState = SERVICE_RUNNING;
serviceStatus.dwControlsAccepted = SERVICE_ACCEPT_STOP | SERVICE_ACCEPT_SHUTDOWN;
serviceStatus.dwWin32ExitCode = 0;
serviceStatus.dwServiceSpecificExitCode = 0;
serviceStatus.dwCheckPoint = 0;
serviceStatus.dwWaitHint = 0;
switch (ctrlCode)
{
case SERVICE_CONTROL_STOP:
case SERVICE_CONTROL_SHUTDOWN:
serviceStatus.dwCurrentState = SERVICE_STOP_PENDING;
serviceStatus.dwWaitHint = 4000;
SetServiceStatus(serviceHandle, &serviceStatus);
/* notify other threads and allow them to terminate */
ZBX_DO_EXIT();
zbx_free_service_resources();
serviceStatus.dwCurrentState = SERVICE_STOPPED;
serviceStatus.dwWaitHint = 0;
serviceStatus.dwCheckPoint = 0;
serviceStatus.dwWin32ExitCode = 0;
break;
default:
break;
}
SetServiceStatus(serviceHandle, &serviceStatus);
}
static VOID WINAPI ServiceEntry(DWORD argc, wchar_t **argv)
{
wchar_t *wservice_name;
wservice_name = zbx_utf8_to_unicode(ZABBIX_SERVICE_NAME);
serviceHandle = RegisterServiceCtrlHandler(wservice_name, ServiceCtrlHandler);
zbx_free(wservice_name);
/* start service initialization */
serviceStatus.dwServiceType = SERVICE_WIN32_OWN_PROCESS;
serviceStatus.dwCurrentState = SERVICE_START_PENDING;
serviceStatus.dwControlsAccepted = SERVICE_ACCEPT_STOP | SERVICE_ACCEPT_SHUTDOWN;
serviceStatus.dwWin32ExitCode = 0;
serviceStatus.dwServiceSpecificExitCode = 0;
serviceStatus.dwCheckPoint = 0;
serviceStatus.dwWaitHint = 2000;
SetServiceStatus(serviceHandle, &serviceStatus);
/* service is running */
serviceStatus.dwCurrentState = SERVICE_RUNNING;
serviceStatus.dwWaitHint = 0;
SetServiceStatus(serviceHandle, &serviceStatus);
MAIN_ZABBIX_ENTRY();
}
void service_start()
{
int ret;
static SERVICE_TABLE_ENTRY serviceTable[2];
serviceTable[0].lpServiceName = zbx_utf8_to_unicode(ZABBIX_SERVICE_NAME);
serviceTable[0].lpServiceProc = (LPSERVICE_MAIN_FUNCTION)ServiceEntry;
serviceTable[1].lpServiceName = NULL;
serviceTable[1].lpServiceProc = NULL;
ret = StartServiceCtrlDispatcher(serviceTable);
zbx_free(serviceTable[0].lpServiceName);
if (0 == ret)
{
if (ERROR_FAILED_SERVICE_CONTROLLER_CONNECT == GetLastError())
{
zbx_error("\n\n\t!!!ATTENTION!!! Zabbix Agent started as a console application. !!!ATTENTION!!!\n");
MAIN_ZABBIX_ENTRY();
}
else
zbx_error("StartServiceCtrlDispatcher() failed: %s", strerror_from_system(GetLastError()));
}
}
static int svc_OpenSCManager(SC_HANDLE *mgr)
{
if (NULL != (*mgr = OpenSCManager(NULL, NULL, GENERIC_WRITE)))
return SUCCEED;
zbx_error("ERROR: cannot connect to Service Manager: %s", strerror_from_system(GetLastError()));
return FAIL;
}
static int svc_OpenService(SC_HANDLE mgr, SC_HANDLE *service, DWORD desired_access)
{
wchar_t *wservice_name;
int ret = SUCCEED;
wservice_name = zbx_utf8_to_unicode(ZABBIX_SERVICE_NAME);
if (NULL == (*service = OpenService(mgr, wservice_name, desired_access)))
{
zbx_error("ERROR: cannot open service [%s]: %s",
ZABBIX_SERVICE_NAME, strerror_from_system(GetLastError()));
ret = FAIL;
}
zbx_free(wservice_name);
return ret;
}
static void svc_get_fullpath(const char *path, wchar_t *fullpath, size_t max_fullpath)
{
wchar_t *wpath;
wpath = zbx_acp_to_unicode(path);
_wfullpath(fullpath, wpath, max_fullpath);
zbx_free(wpath);
}
static void svc_get_command_line(const char *path, int multiple_agents, wchar_t *cmdLine, size_t max_cmdLine)
{
wchar_t path1[MAX_PATH], path2[MAX_PATH];
svc_get_fullpath(path, path2, MAX_PATH);
if (NULL == wcsstr(path2, TEXT(".exe")))
StringCchPrintf(path1, MAX_PATH, TEXT("%s.exe"), path2);
else
StringCchPrintf(path1, MAX_PATH, path2);
if (NULL != CONFIG_FILE)
{
svc_get_fullpath(CONFIG_FILE, path2, MAX_PATH);
StringCchPrintf(cmdLine, max_cmdLine, TEXT("\"%s\" %s--config \"%s\""),
path1,
(0 == multiple_agents) ? TEXT("") : TEXT("--multiple-agents "),
path2);
}
else
StringCchPrintf(cmdLine, max_cmdLine, TEXT("\"%s\""), path1);
}
static int svc_install_event_source(const char *path)
{
HKEY hKey;
DWORD dwTypes = EVENTLOG_ERROR_TYPE | EVENTLOG_WARNING_TYPE | EVENTLOG_INFORMATION_TYPE;
wchar_t execName[MAX_PATH];
wchar_t regkey[256], *wevent_source;
svc_get_fullpath(path, execName, MAX_PATH);
wevent_source = zbx_utf8_to_unicode(ZABBIX_EVENT_SOURCE);
StringCchPrintf(regkey, ARRSIZE(regkey), EVENTLOG_REG_PATH TEXT("System\\%s"), wevent_source);
zbx_free(wevent_source);
if (ERROR_SUCCESS != RegCreateKeyEx(HKEY_LOCAL_MACHINE, regkey, 0, NULL, REG_OPTION_NON_VOLATILE,
KEY_SET_VALUE, NULL, &hKey, NULL))
{
zbx_error("unable to create registry key: %s", strerror_from_system(GetLastError()));
return FAIL;
}
RegSetValueEx(hKey, TEXT("TypesSupported"), 0, REG_DWORD, (BYTE *)&dwTypes, sizeof(DWORD));
RegSetValueEx(hKey, TEXT("EventMessageFile"), 0, REG_EXPAND_SZ, (BYTE *)execName,
(DWORD)(wcslen(execName) + 1) * sizeof(wchar_t));
RegCloseKey(hKey);
zbx_error("event source [%s] installed successfully", ZABBIX_EVENT_SOURCE);
return SUCCEED;
}
int ZabbixCreateService(const char *path, int multiple_agents)
{
SC_HANDLE mgr, service;
SERVICE_DESCRIPTION sd;
wchar_t cmdLine[MAX_PATH];
wchar_t *wservice_name;
DWORD code;
int ret = FAIL;
if (FAIL == svc_OpenSCManager(&mgr))
return ret;
svc_get_command_line(path, multiple_agents, cmdLine, MAX_PATH);
wservice_name = zbx_utf8_to_unicode(ZABBIX_SERVICE_NAME);
if (NULL == (service = CreateService(mgr, wservice_name, wservice_name, GENERIC_READ, SERVICE_WIN32_OWN_PROCESS,
SERVICE_AUTO_START, SERVICE_ERROR_NORMAL, cmdLine, NULL, NULL, NULL, NULL, NULL)))
{
if (ERROR_SERVICE_EXISTS == (code = GetLastError()))
zbx_error("ERROR: service [%s] already exists", ZABBIX_SERVICE_NAME);
else
zbx_error("ERROR: cannot create service [%s]: %s", ZABBIX_SERVICE_NAME, strerror_from_system(code));
}
else
{
zbx_error("service [%s] installed successfully", ZABBIX_SERVICE_NAME);
CloseServiceHandle(service);
ret = SUCCEED;
/* update the service description */
if (SUCCEED == svc_OpenService(mgr, &service, SERVICE_CHANGE_CONFIG))
{
sd.lpDescription = TEXT("Provides system monitoring");
if (0 == ChangeServiceConfig2(service, SERVICE_CONFIG_DESCRIPTION, &sd))
zbx_error("service description update failed: %s", strerror_from_system(GetLastError()));
CloseServiceHandle(service);
}
}
zbx_free(wservice_name);
CloseServiceHandle(mgr);
if (SUCCEED == ret)
ret = svc_install_event_source(path);
return ret;
}
static int svc_RemoveEventSource()
{
wchar_t regkey[256];
wchar_t *wevent_source;
int ret = FAIL;
wevent_source = zbx_utf8_to_unicode(ZABBIX_EVENT_SOURCE);
StringCchPrintf(regkey, ARRSIZE(regkey), EVENTLOG_REG_PATH TEXT("System\\%s"), wevent_source);
zbx_free(wevent_source);
if (ERROR_SUCCESS == RegDeleteKey(HKEY_LOCAL_MACHINE, regkey))
{
zbx_error("event source [%s] uninstalled successfully", ZABBIX_EVENT_SOURCE);
ret = SUCCEED;
}
else
{
zbx_error("unable to uninstall event source [%s]: %s",
ZABBIX_EVENT_SOURCE, strerror_from_system(GetLastError()));
}
return SUCCEED;
}
int ZabbixRemoveService()
{
SC_HANDLE mgr, service;
int ret = FAIL;
if (FAIL == svc_OpenSCManager(&mgr))
return ret;
if (SUCCEED == svc_OpenService(mgr, &service, DELETE))
{
if (0 != DeleteService(service))
{
zbx_error("service [%s] uninstalled successfully", ZABBIX_SERVICE_NAME);
ret = SUCCEED;
}
else
{
zbx_error("ERROR: cannot remove service [%s]: %s",
ZABBIX_SERVICE_NAME, strerror_from_system(GetLastError()));
}
CloseServiceHandle(service);
}
CloseServiceHandle(mgr);
if (SUCCEED == ret)
ret = svc_RemoveEventSource();
return ret;
}
int ZabbixStartService()
{
SC_HANDLE mgr, service;
int ret = FAIL;
if (FAIL == svc_OpenSCManager(&mgr))
return ret;
if (SUCCEED == svc_OpenService(mgr, &service, SERVICE_START))
{
if (0 != StartService(service, 0, NULL))
{
zbx_error("service [%s] started successfully", ZABBIX_SERVICE_NAME);
ret = SUCCEED;
}
else
{
zbx_error("ERROR: cannot start service [%s]: %s",
ZABBIX_SERVICE_NAME, strerror_from_system(GetLastError()));
}
CloseServiceHandle(service);
}
CloseServiceHandle(mgr);
return ret;
}
int ZabbixStopService()
{
SC_HANDLE mgr, service;
SERVICE_STATUS status;
int ret = FAIL;
if (FAIL == svc_OpenSCManager(&mgr))
return ret;
if (SUCCEED == svc_OpenService(mgr, &service, SERVICE_STOP))
{
if (0 != ControlService(service, SERVICE_CONTROL_STOP, &status))
{
zbx_error("service [%s] stopped successfully", ZABBIX_SERVICE_NAME);
ret = SUCCEED;
}
else
{
zbx_error("ERROR: cannot stop service [%s]: %s",
ZABBIX_SERVICE_NAME, strerror_from_system(GetLastError()));
}
CloseServiceHandle(service);
}
CloseServiceHandle(mgr);
return ret;
}
void set_parent_signal_handler()
{
signal(SIGINT, parent_signal_handler);
signal(SIGTERM, parent_signal_handler);
}
void CALLBACK ZBXEndThread(ULONG_PTR dwParam)
{
_endthreadex(SUCCEED);
}
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