ZwQueryObject function (ntifs.h)

아티클
07/06/2023

The ZwQueryObject routine provides information about a supplied object.

Syntax

NTSYSAPI NTSTATUS ZwQueryObject(
  [in, optional]  HANDLE                   Handle,
  [in]            OBJECT_INFORMATION_CLASS ObjectInformationClass,
  [out, optional] PVOID                    ObjectInformation,
  [in]            ULONG                    ObjectInformationLength,
  [out, optional] PULONG                   ReturnLength
);

Parameters

[in, optional] Handle

A handle to the object to obtain information about.

[in] ObjectInformationClass

Specifies an OBJECT_INFORMATION_CLASS value that determines the type of information returned in the ObjectInformation buffer.

[out, optional] ObjectInformation

A pointer to a caller-allocated buffer that receives the requested information.

[in] ObjectInformationLength

Specifies the size, in bytes, of the ObjectInformation buffer.

[out, optional] ReturnLength

A pointer to a variable that receives the size, in bytes, of the requested key information. If ZwQueryObject returns STATUS_SUCCESS, the variable contains the amount of data returned. If ZwQueryObject returns STATUS_BUFFER_OVERFLOW or STATUS_BUFFER_TOO_SMALL, you can use the value of the variable to determine the required buffer size.

Return value

ZwQueryObject returns STATUS_SUCCESS or an appropriate error status. Possible error status codes include the following:

Return code	Description
STATUS_ACCESS_DENIED	There were insufficient permissions to perform this query.
STATUS_INVALID_HANDLE	The supplied object handle is invalid.
STATUS_INFO_LENGTH_MISMATCH	The info length is not sufficient to hold the data.

Remarks

If the call to the ZwQueryObject function occurs in user mode, you should use the name "NtQueryObject" instead of "ZwQueryObject".

For calls from kernel-mode drivers, the NtXxx and ZwXxx versions of a Windows Native System Services routine can behave differently in the way that they handle and interpret input parameters. For more information about the relationship between the NtXxx and ZwXxx versions of a routine, see Using Nt and Zw Versions of the Native System Services Routines.

Requirements

Requirement	Value
Minimum supported client	Windows 2000.
Target Platform	Universal
Header	ntifs.h (include Ntifs.h, FltKernel.h)
Library	NtosKrnl.lib
DLL	NtosKrnl.exe
IRQL	PASSIVE_LEVEL
DDI compliance rules	HwStorPortProhibitedDDIs(storport), PowerIrpDDis(wdm)

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