I use this code to get pending windows updates and also most of the informations of the update:
static List<PendingUpdate> GetPendingUpdates()
{
var updateSession = new UpdateSession();
var updateSearcher = updateSession.CreateUpdateSearcher();
updateSearcher.Online = false; //set to true if you want to search online
List<PendingUpdate> pendingUpdates = new List<PendingUpdate>();
try
{
var searchResult = updateSearcher.Search("IsInstalled=0 And IsHidden=0");
if (searchResult.Updates.Count > 0)
{
Console.WriteLine("There are updates available for installation");
foreach (IUpdate windowsUpdate in searchResult.Updates)
{
PendingUpdate update = new PendingUpdate();
update.Title = windowsUpdate.Title;
update.Description = windowsUpdate.Description;
update.Downloaded = windowsUpdate.IsDownloaded;
update.Urls = new List<string>();
foreach (string url in windowsUpdate.MoreInfoUrls)
{
update.Urls.Add(url);
}
foreach (dynamic category in windowsUpdate.Categories)
{
update.Categories += category.Name + ", ";
}
pendingUpdates.Add(update);
}
}
}
catch (Exception ex)
{
Console.WriteLine("ERROR");
throw ex;
}
return pendingUpdates;
}
I also use this code to get to know if the computer currently needs a restart to finish installed updates:
static bool needsRestart()
{
ISystemInformation systemInfo = new SystemInformation();
return systemInfo.RebootRequired;
}
Now my question is, is it possible to get to know if an pending update needs a computer restart to finish? In the first code I get a IUpdate object but I dont see informations about a needed restart after installing this update. I there a way to get this information?
For the asynchronous installation I use something like this:
rebootRequired = false;
UpdateSession updateSession = new UpdateSession();
updateSession.ClientApplicationID = SusClientID;
IUpdateInstaller updatesInstaller = updateSession.CreateUpdateInstaller();
IInstallationJob job = updatesInstaller.BeginInstall(InstallProgressCallback, installComplete, installState);
// here is your installer code and the checking if the installation is completed
IInstallationProgress jobProgress = job.GetProgress();
for (int updateindex = 0; updateindex < updatesInstaller.Updates.Count; updateindex++)
{
IUpdateInstallationResult updateInstallResult = jobProgress.GetUpdateResult(updateindex);
rebootRequired |= updateInstallResult.RebootRequired;
}
if(rebootRequired)
{
// any of the updates need a reboot
}
I'm looking to parse the WebCacheV01.dat file using C# to find the last file location for upload in an Internet browser.
%LocalAppData%\Microsoft\Windows\WebCache\WebCacheV01.dat
I using the Managed Esent nuget package.
Esent.Isam
Esent.Interop
When I try and run the below code it fails at:
Api.JetGetDatabaseFileInfo(filePath, out pageSize, JET_DbInfo.PageSize);
Or if I use
Api.JetSetSystemParameter(instance, JET_SESID.Nil, JET_param.CircularLog, 1, null);
at
Api.JetAttachDatabase(sesid, filePath, AttachDatabaseGrbit.ReadOnly);
I get the following error:
An unhandled exception of type
'Microsoft.Isam.Esent.Interop.EsentFileAccessDeniedException' occurred
in Esent.Interop.dll
Additional information: Cannot access file, the file is locked or in use
string localAppDataPath = Environment.GetFolderPath(Environment.SpecialFolder.LocalApplicationData);
string filePathExtra = #"\Microsoft\Windows\WebCache\WebCacheV01.dat";
string filePath = string.Format("{0}{1}", localAppDataPath, filePathExtra);
JET_INSTANCE instance;
JET_SESID sesid;
JET_DBID dbid;
JET_TABLEID tableid;
String connect = "";
JET_SNP snp;
JET_SNT snt;
object data;
int numInstance = 0;
JET_INSTANCE_INFO [] instances;
int pageSize;
JET_COLUMNDEF columndef = new JET_COLUMNDEF();
JET_COLUMNID columnid;
Api.JetCreateInstance(out instance, "instance");
Api.JetGetDatabaseFileInfo(filePath, out pageSize, JET_DbInfo.PageSize);
Api.JetSetSystemParameter(JET_INSTANCE.Nil, JET_SESID.Nil, JET_param.DatabasePageSize, pageSize, null);
//Api.JetSetSystemParameter(instance, JET_SESID.Nil, JET_param.CircularLog, 1, null);
Api.JetInit(ref instance);
Api.JetBeginSession(instance, out sesid, null, null);
//Do stuff in db
Api.JetEndSession(sesid, EndSessionGrbit.None);
Api.JetTerm(instance);
Is it not possible to read this without making modifications?
Viewer
http://www.nirsoft.net/utils/ese_database_view.html
Python
https://jon.glass/attempts-to-parse-webcachev01-dat/
libesedb
impacket
Issue:
The file is probably in use.
Solution:
in order to free the locked file, please stop the Schedule Task -\Microsoft\Windows\Wininet\CacheTask.
The Code
public override IEnumerable<string> GetBrowsingHistoryUrls(FileInfo fileInfo)
{
var fileName = fileInfo.FullName;
var results = new List<string>();
try
{
int pageSize;
Api.JetGetDatabaseFileInfo(fileName, out pageSize, JET_DbInfo.PageSize);
SystemParameters.DatabasePageSize = pageSize;
using (var instance = new Instance("Browsing History"))
{
var param = new InstanceParameters(instance);
param.Recovery = false;
instance.Init();
using (var session = new Session(instance))
{
Api.JetAttachDatabase(session, fileName, AttachDatabaseGrbit.ReadOnly);
JET_DBID dbid;
Api.JetOpenDatabase(session, fileName, null, out dbid, OpenDatabaseGrbit.ReadOnly);
using (var tableContainers = new Table(session, dbid, "Containers", OpenTableGrbit.ReadOnly))
{
IDictionary<string, JET_COLUMNID> containerColumns = Api.GetColumnDictionary(session, tableContainers);
if (Api.TryMoveFirst(session, tableContainers))
{
do
{
var retrieveColumnAsInt32 = Api.RetrieveColumnAsInt32(session, tableContainers, columnIds["ContainerId"]);
if (retrieveColumnAsInt32 != null)
{
var containerId = (int)retrieveColumnAsInt32;
using (var table = new Table(session, dbid, "Container_" + containerId, OpenTableGrbit.ReadOnly))
{
var tableColumns = Api.GetColumnDictionary(session, table);
if (Api.TryMoveFirst(session, table))
{
do
{
var url = Api.RetrieveColumnAsString(
session,
table,
tableColumns["Url"],
Encoding.Unicode);
var downloadedFileName = Api.RetrieveColumnAsString(
session,
table,
columnIds2["Filename"]);
if(string.IsNullOrEmpty(downloadedFileName)) // check for download history only.
continue;
// Order by access Time to find the last uploaded file.
var accessedTime = Api.RetrieveColumnAsInt64(
session,
table,
columnIds2["AccessedTime"]);
var lastVisitTime = accessedTime.HasValue ? DateTime.FromFileTimeUtc(accessedTime.Value) : DateTime.MinValue;
results.Add(url);
}
while (Api.TryMoveNext(session, table.JetTableid));
}
}
}
} while (Api.TryMoveNext(session, tableContainers));
}
}
}
}
}
catch (Exception ex)
{
// log goes here....
}
return results;
}
Utils
Task Scheduler Wrapper
You can use Microsoft.Win32.TaskScheduler.TaskService Wrapper to stop it using c#, just add this Nuget package [nuget]:https://taskscheduler.codeplex.com/
Usage
public static FileInfo CopyLockedFileRtl(DirectoryInfo directory, FileInfo fileInfo, string remoteEndPoint)
{
FileInfo copiedFileInfo = null;
using (var ts = new TaskService(string.Format(#"\\{0}", remoteEndPoint)))
{
var task = ts.GetTask(#"\Microsoft\Windows\Wininet\CacheTask");
task.Stop();
task.Enabled = false;
var byteArray = FileHelper.ReadOnlyAllBytes(fileInfo);
var filePath = Path.Combine(directory.FullName, "unlockedfile.dat");
File.WriteAllBytes(filePath, byteArray);
copiedFileInfo = new FileInfo(filePath);
task.Enabled = true;
task.Run();
task.Dispose();
}
return copiedFileInfo;
}
I was not able to get Adam's answer to work. What worked for me was making a copy with AlphaVSS (a .NET class library that has a managed API for the Volume Shadow Copy Service). The file was in "Dirty Shutdown" state, so I additionally wrote this to handle the exception it threw when I opened it:
catch (EsentErrorException ex)
{ // Usually after the database is copied, it's in Dirty Shutdown state
// This can be verified by running "esentutl.exe /Mh WebCacheV01.dat"
logger.Info(ex.Message);
switch (ex.Error)
{
case JET_err.SecondaryIndexCorrupted:
logger.Info("Secondary Index Corrupted detected, exiting...");
Api.JetTerm2(instance, TermGrbit.Complete);
return false;
case JET_err.DatabaseDirtyShutdown:
logger.Info("Dirty shutdown detected, attempting to recover...");
try
{
Api.JetTerm2(instance, TermGrbit.Complete);
Process.Start("esentutl.exe", "/p /o " + newPath);
Thread.Sleep(5000);
Api.JetInit(ref instance);
Api.JetBeginSession(instance, out sessionId, null, null);
Api.JetAttachDatabase(sessionId, newPath, AttachDatabaseGrbit.None);
}
catch (Exception e2)
{
logger.Info("Could not recover database " + newPath + ", will try opening it one last time. If that doesn't work, try using other esentutl commands", e2);
}
break;
}
}
I'm thinking about using the 'Recent Items' folder as when you select a file to upload an entry is written here:
C:\Users\USER\AppData\Roaming\Microsoft\Windows\Recent
string recent = (Environment.GetFolderPath(Environment.SpecialFolder.Recent));
I'm not a developer so maybe the answer is out there for a different solution but I can't really translate it from python or something else.
I'm trying to use the AWS .NET SDK to find an instance and then get the instance's tags. I've gotten as far as being able to determine if an instance is up and running or not. I also see how I can create and delete tags (not in code example below). But I don't see an easy way to actually check if a tag exists and get the value of the tag if it does exist.
Sorry if I'm missing the obvious but this is all new to me. Here's an example of the code I'm using to check if an instance is running.
instanceID = "i-myInstanceID";
do {
var myrequest = new DescribeInstanceStatusRequest();
DescribeInstanceStatusResponse myresponse = ec2.DescribeInstanceStatus(myrequest);
int isCount = myresponse.DescribeInstanceStatusResult.InstanceStatuses.Count;
for (int isc=0; isc < isCount; isc++) {
InstanceStatus instanceStatus = myresponse.DescribeInstanceStatusResult.InstanceStatuses[isc];
if (instanceStatus.InstanceId.Contains(instanceID)) {
Console.WriteLine("It looks like instance "+instanceID+" is running.");
idIdx = isc;
foundID = true;
break;
}
}
if ((foundID==false) && (secondCounter==1)) {
Console.Write("Looking for instance "+instanceID);
} else {
Console.Write(".");
}
Thread.Sleep(1000);
secondCounter++;
if (secondCounter > 5) {
break;
}
} while (foundID == false) ;
First send a DescribeInstancesRequest to get the list of Instances:
public DescribeInstancesResult GetInstances(Ec2Key ec2Key)
{
_logger.Debug("GetInstances Start.");
AmazonEC2 ec2 = CreateAmazonEc2Client(ec2Key);
var ec2Request = new DescribeInstancesRequest();
DescribeInstancesResponse describeInstancesResponse = ec2.DescribeInstances(ec2Request);
DescribeInstancesResult result = describeInstancesResponse.DescribeInstancesResult;
_logger.Debug("GetInstances End.");
return result;
}
Then loop through the instances until you find the one you want, and then use the Tag.GetTagValueByKey method:
// This just calls the above code
DescribeInstancesResult ec2Instances = _ec2ResourceAccess.GetInstances(ec2Key);
var returnInstances = new List<Ec2UtilityInstance>();
foreach (var reservation in ec2Instances.Reservation)
{
foreach (var runningInstance in reservation.RunningInstance)
{
var returnInstance = new Ec2UtilityInstance();
returnInstance.InstanceId = runningInstance.InstanceId;
returnInstance.InstanceName = runningInstance.Tag.GetTagValueByKey("Name");
returnInstance.Status = (Ec2UtilityInstanceStatus)Enum.Parse(typeof(Ec2UtilityInstanceStatus), runningInstance.InstanceState.Name, true);
returnInstance.DefaultIp = runningInstance.Tag.GetTagValueByKey("DefaultIp");
returnInstance.InstanceType = runningInstance.InstanceType;
returnInstance.ImageId = runningInstance.ImageId;
returnInstances.Add(returnInstance);
}
}
Here is the link for full source that this was taken from:
https://github.com/escherrer/EC2Utilities
Common\Manager
and
Common\ResourceAccess
I am looking for the best way how to lookup LDAP directory for users by given criteria. At the moment the best performance seems to offer usage of ADsDSObject provider. The code will run in ASP.NET web site.
I would like to confirm how to properly dispose the resources. Here is the code used at the moment. Is the code releasing resources correctly or need to be improved?
public static List<LookupValues> FindBy(LdapSearchCriteria criteria)
{
List<LookupValues> usersMatchingCriteria = new List<LookupValues>();
ADODB.Command adoCommand = new ADODB.Command();
ADODB.Connection adoConnection = new ADODB.Connection();
ADODB.Recordset adoResultSet = new ADODB.Recordset();
adoConnection.ConnectionString = connectionString;
adoConnection.Open();
adoCommand.ActiveConnection = adoConnection;
adoCommand.CommandText = BuildSelectStatmentFrom(criteria);
object dummy = Type.Missing;
try
{
adoResultSet = adoCommand.Execute(out dummy, ref dummy, 0);
if (adoResultSet != null)
{
while (adoResultSet.EOF == false)
{
LookupValues value = new LookupValues();
for (int i = 0; i < adoResultSet.Fields.Count; i++)
{
switch (adoResultSet.Fields[i].Name)
{
case "a-foreignGivenName":
value.FirstName = (adoResultSet.Fields[i].Value).ToString();
break;
case "a-foreignSn":
value.LastName = (adoResultSet.Fields[i].Value).ToString();
break;
}
}
usersMatchingCriteria.Add(value);
adoResultSet.MoveNext();
}
}
}
finally
{
if (adoResultSet != null)
{
adoResultSet.Close();
adoResultSet = null;
}
if (adoConnection != null)
{
adoConnection.Close();
adoConnection = null;
}
}
return usersMatchingCriteria;
}
I found equivalent and even a bit faster to use classes from System.DirectoryServices.Protocols namespace. Equivalent code using .NET classes
public List<LookupValues> FindBy(LdapSearchCriteria criteria)
{
List<LookupValues> usersMatchingCriteria = new List<LookupValues>();
NetworkCredential credentials = new NetworkCredential(connectionDetails.UserName, connectionDetails.Password, connectionDetails.Domain);
LdapDirectoryIdentifier directoryIdentifier = new LdapDirectoryIdentifier(connectionDetails.Server, connectionDetails.Port, false, false);
using (LdapConnection connection = CreateConnection(directoryIdentifier))
{
connection.Bind(credentials);
SearchRequest search = CreateSearchRequest(criteria);
SearchResponse response = connection.SendRequest(search) as SearchResponse;
foreach (SearchResultEntry entry in response.Entries)
{
LookupValues foundUser = GetUserDetailsFrom(entry);
usersMatchingCriteria.Add(foundUser);
}
}
return usersMatchingCriteria;
}
In my application I need to check whether or not I have permissions to write to a folder. I use the following method:
public bool IsAvailable(string path)
{
bool hasPermissions = false;
if (Directory.Exists(path))
{
var permission = new FileIOPermission(FileIOPermissionAccess.Write, path);
try
{
permission.Demand();
hasPermissions = true;
}
catch(SecurityException e)
{
hasPermissions = false;
}
}
return hasPermissions;
}
When I give it a path to a Folder that I know for certain no one has access to it (I've removed all permission for all users in the Security Tab of the Folder Properties), it doesn't throw any exception. It just continues along the try block.
Any ideas why or how to do this check better?
The AppDomain.PermissionSet Property related answers I found on other question had no succes.
Thank you in advance.
I had used the following method to get it done:
public static bool HasWritePermissionOnDir(string path)
{
var writeAllow = false;
var writeDeny = false;
var accessControlList = Directory.GetAccessControl(path);
if (accessControlList == null)
return false;
var accessRules = accessControlList.GetAccessRules(true, true, typeof(System.Security.Principal.SecurityIdentifier));
if (accessRules == null)
return false;
foreach (FileSystemAccessRule rule in accessRules)
{
if ((FileSystemRights.Write & rule.FileSystemRights) != FileSystemRights.Write) continue;
if (rule.AccessControlType == AccessControlType.Allow)
writeAllow = true;
else if (rule.AccessControlType == AccessControlType.Deny)
writeDeny = true;
}
return writeAllow && !writeDeny;
}
Please let me know if it helped you and if yes mark it too
This method (ask if accessible, then do something) is prone to race conditions. Between your check and an actual access to content in that directory, the permissions may change.
Better just try to read/write something in that directory, and catch a potential exception.
So don't
if(IsAvailable(path)) {
try {
doSomething();
} catch (...) {
}
}
but rather
try {
doSomething();
} catch (...) {
}
Grace Hopper quote:
“It’s always easier to ask forgiveness than it is to get permission.”
var permissionSet = new PermissionSet(PermissionState.None);
var writePermission = new FileIOPermission(FileIOPermissionAccess.Write, filename);
permissionSet.AddPermission(writePermission);
if (permissionSet.IsSubsetOf(AppDomain.CurrentDomain.PermissionSet))
{}