Zabbix

/*

** Zabbix

** Copyright (C) 2001-2023 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 "zbxsymbols.h"

​

#include "zbxcommon.h"

#include "log.h"

​

DWORD   (__stdcall *zbx_GetGuiResources)(HANDLE, DWORD) = NULL;

BOOL    (__stdcall *zbx_GetProcessIoCounters)(HANDLE, PIO_COUNTERS) = NULL;

BOOL    (__stdcall *zbx_GetPerformanceInfo)(PPERFORMANCE_INFORMATION, DWORD) = NULL;

BOOL    (__stdcall *zbx_GlobalMemoryStatusEx)(LPMEMORYSTATUSEX) = NULL;

BOOL    (__stdcall *zbx_GetFileInformationByHandleEx)(HANDLE, ZBX_FILE_INFO_BY_HANDLE_CLASS, LPVOID, DWORD) = NULL;

​

static FARPROC  GetProcAddressAndLog(HMODULE hModule, const char *procName)

{

    FARPROC ptr;

​

    if (NULL == (ptr = GetProcAddress(hModule, procName)))

        zabbix_log(LOG_LEVEL_DEBUG, "unable to resolve symbol '%s'", procName);

​

    return ptr;

}

​

void    zbx_import_symbols(void)

{

    HMODULE hModule;

​

    if (NULL != (hModule = GetModuleHandle(TEXT("USER32.DLL"))))

        zbx_GetGuiResources = (DWORD (__stdcall *)(HANDLE, DWORD))GetProcAddressAndLog(hModule, "GetGuiResources");

    else

        zabbix_log(LOG_LEVEL_DEBUG, "unable to get handle to USER32.DLL");

​

    if (NULL != (hModule = GetModuleHandle(TEXT("KERNEL32.DLL"))))

    {

        zbx_GetProcessIoCounters = (BOOL (__stdcall *)(HANDLE, PIO_COUNTERS))GetProcAddressAndLog(hModule, "GetProcessIoCounters");

        zbx_GlobalMemoryStatusEx = (BOOL (__stdcall *)(LPMEMORYSTATUSEX))GetProcAddressAndLog(hModule, "GlobalMemoryStatusEx");

        zbx_GetFileInformationByHandleEx = (BOOL (__stdcall *)(HANDLE, ZBX_FILE_INFO_BY_HANDLE_CLASS, LPVOID,

                DWORD))GetProcAddressAndLog(hModule, "GetFileInformationByHandleEx");

    }

    else

        zabbix_log(LOG_LEVEL_DEBUG, "unable to get handle to KERNEL32.DLL");

​

    if (NULL != (hModule = GetModuleHandle(TEXT("PSAPI.DLL"))))

        zbx_GetPerformanceInfo = (BOOL (__stdcall *)(PPERFORMANCE_INFORMATION, DWORD))GetProcAddressAndLog(hModule, "GetPerformanceInfo");

    else

        zabbix_log(LOG_LEVEL_DEBUG, "unable to get handle to PSAPI.DLL");