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Symlink/Shortcut support [message #24830]

Mon, 01 February 2010 08:02

koldo
Messages: 3432
Registered: August 2008

Senior Veteran

Hello all

Now symlinks-shortcuts are supported in Core only in Linux with:

FindFile::IsSymLink();

It would be good to have a wider support in Linux and Windows.

The proposal is to add IsSymlink() for both OS and a new function like

bool GetSymLinkPath(const char *linkPath, String &filePath);

to get the real path of the symlink.

The implementation could be (some parts has been borrowed from U++):

bool IsSymLink(const char *path) {
#ifdef PLATFORM_WIN32	
	return GetFileExt(path) == ".lnk";
#else
	struct stat stf;
	lstat(path, &stf);
	return S_ISLNK(stf.st_mode);
#endif
}

bool GetSymLinkPath(const char *linkPath, String &filePath)
{
#ifdef PLATFORM_WIN32	
	HRESULT hres;
	IShellLink* psl;
	IPersistFile* ppf;
	CoInitialize(NULL);
	hres = CoCreateInstance(CLSID_ShellLink, NULL, CLSCTX_INPROC_SERVER, IID_IShellLink,
	                        (PVOID *) &psl);
	if(SUCCEEDED(hres)) {
		hres = psl->QueryInterface(IID_IPersistFile, (PVOID *) &ppf);
		if(SUCCEEDED(hres)) {
			hres = ppf->Load(ToSystemCharsetW(linkPath), STGM_READ);
			if(SUCCEEDED(hres)) {
				char fileW[_MAX_PATH] = {0};
				psl->GetPath(fileW, _MAX_PATH, NULL, 0); 
				filePath = FromSystemCharset(fileW);
			} else
				return false;
			ppf->Release();
		} else
			return false;
		psl->Release();
	} else
		return false;
	CoUninitialize();
	return true;
#else
	char buff[_MAX_PATH + 1];
	bool ret;
	int len = readlink(linkPath, buff, _MAX_PATH);
	if (ret = (len > 0 && len < _MAX_PATH))
		buff[len] = '\0';
	else 
		*buff = '\0';
	filePath = buff;
	return ret;
#endif
}

Best regards
Iñaki

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