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MachineInstaller.cpp

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MachineInstaller.cpp

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#include "stdafx.h"
#include "unzip.h"
#include "MachineInstaller.h"
#include "resource.h"
#include <sddl.h>
bool directoryExists(wchar_t* path) {
DWORD dwResult = GetFileAttributes(path);
if (dwResult != INVALID_FILE_ATTRIBUTES) {
return true;
}
// NB: The directory could exist but we can't access it, let's check
DWORD dwLastError = GetLastError();
if (dwLastError == ERROR_FILE_NOT_FOUND) return false;
if (dwLastError == ERROR_PATH_NOT_FOUND) return false;
return true;
}
bool MachineInstaller::ShouldSilentInstall()
{
// Figure out the package name from our own EXE name
// The name consist of [$pkgName]DeploymentTool.exe
wchar_t ourFile[MAX_PATH];
HMODULE hMod = GetModuleHandle(NULL);
GetModuleFileName(hMod, ourFile, _countof(ourFile));
CString fullPath = CString(ourFile);
CString pkgName = CString(ourFile + fullPath.ReverseFind(L'\\'));
pkgName.Replace(L"DeploymentTool.exe", L"");
wchar_t installFolder[MAX_PATH];
// NB: Users often get into the sitch where they install the MSI, then try to
// install the standalone package on top of that. In previous versions we tried
// to detect if the app was properly installed, but now we're taking the much
// more conservative approach, that if the package dir exists in any way, we're
// bailing out
// C:\Users\Username\AppData\Local\$pkgName
SHGetFolderPath(NULL, CSIDL_LOCAL_APPDATA, NULL, SHGFP_TYPE_CURRENT, installFolder);
wcscat(installFolder, L"\\");
wcscat(installFolder, pkgName);
if (directoryExists(installFolder)) {
return false;
}
// C:\ProgramData\$pkgName\$username
wchar_t username[512];
DWORD unamesize = _countof(username);
SHGetFolderPath(NULL, CSIDL_COMMON_APPDATA, NULL, SHGFP_TYPE_CURRENT, installFolder);
GetUserName(username, &unamesize);
wcscat(installFolder, L"\\");
wcscat(installFolder, pkgName);
wcscat(installFolder, L"\\");
wcscat(installFolder, username);
if (directoryExists(installFolder)) {
return false;
}
// None of these exist, we should install
return true;
}
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