/* The maximum size of an environment value (in bytes) */
#define MAX_ENVVAL_SIZE 1024
+extern LIST_ENTRY HandleTableListHead;
+extern EX_PUSH_LOCK HandleTableListLock;
+
FAST_MUTEX ExpEnvironmentLock;
ERESOURCE ExpFirmwareTableResource;
LIST_ENTRY ExpFirmwareTableProviderListHead;
_SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
{
ExFreePoolWithTag(Mdl, TAG_MDL);
- return _SEH2_GetExceptionCode();
+ _SEH2_YIELD(return _SEH2_GetExceptionCode());
}
_SEH2_END;
NTSTATUS
NTAPI
NtSetSystemEnvironmentValueEx(IN PUNICODE_STRING VariableName,
- IN LPGUID VendorGuid
+ IN LPGUID VendorGuid,
IN PVOID Value,
IN OUT PULONG ReturnLength,
IN OUT PULONG Attributes)
{
SpiCurrent = (PSYSTEM_PROCESS_INFORMATION) Current;
+ /* Lock the Process */
+ KeEnterCriticalRegion();
+ ExAcquirePushLockShared(&Process->ProcessLock);
+
if ((Process->ProcessExiting) &&
(Process->Pcb.Header.SignalState) &&
!(Process->ActiveThreads) &&
Process, Process->ImageFileName, Process->UniqueProcessId);
CurrentSize = 0;
ImageNameMaximumLength = 0;
+
+ /* Unlock the Process */
+ ExReleasePushLockShared(&Process->ProcessLock);
+ KeLeaveCriticalRegion();
goto Skip;
}
ProcessImageName = NULL;
}
+ /* Unlock the Process */
+ ExReleasePushLockShared(&Process->ProcessLock);
+ KeLeaveCriticalRegion();
+
/* Handle idle process entry */
Skip:
if (Process == PsIdleProcess) Process = NULL;
/* Class 16 - Handle Information */
QSI_DEF(SystemHandleInformation)
{
- PEPROCESS pr, syspr;
- ULONG curSize, i = 0;
- ULONG hCount = 0;
-
- PSYSTEM_HANDLE_INFORMATION Shi =
- (PSYSTEM_HANDLE_INFORMATION) Buffer;
+ PSYSTEM_HANDLE_INFORMATION HandleInformation;
+ PLIST_ENTRY NextTableEntry;
+ PHANDLE_TABLE HandleTable;
+ PHANDLE_TABLE_ENTRY HandleTableEntry;
+ EXHANDLE Handle;
+ ULONG Index = 0;
+ NTSTATUS Status;
+ PMDL Mdl;
+ PAGED_CODE();
DPRINT("NtQuerySystemInformation - SystemHandleInformation\n");
- if (Size < sizeof(SYSTEM_HANDLE_INFORMATION))
+ /* Set initial required buffer size */
+ *ReqSize = FIELD_OFFSET(SYSTEM_HANDLE_INFORMATION, Handles);
+
+ /* Check user's buffer size */
+ if (Size < *ReqSize)
{
- *ReqSize = sizeof(SYSTEM_HANDLE_INFORMATION);
return STATUS_INFO_LENGTH_MISMATCH;
}
- DPRINT("SystemHandleInformation 1\n");
+ /* We need to lock down the memory */
+ Status = ExLockUserBuffer(Buffer,
+ Size,
+ ExGetPreviousMode(),
+ IoWriteAccess,
+ (PVOID*)&HandleInformation,
+ &Mdl);
+ if (!NT_SUCCESS(Status))
+ {
+ DPRINT1("Failed to lock the user buffer: 0x%lx\n", Status);
+ return Status;
+ }
- /* First Calc Size from Count. */
- syspr = PsGetNextProcess(NULL);
- pr = syspr;
+ /* Reset of count of handles */
+ HandleInformation->NumberOfHandles = 0;
- do
- {
- hCount = hCount + ObGetProcessHandleCount(pr);
- pr = PsGetNextProcess(pr);
+ /* Enter a critical region */
+ KeEnterCriticalRegion();
- if ((pr == syspr) || (pr == NULL)) break;
- }
- while ((pr != syspr) && (pr != NULL));
+ /* Acquire the handle table lock */
+ ExAcquirePushLockShared(&HandleTableListLock);
- if(pr != NULL)
+ /* Enumerate all system handles */
+ for (NextTableEntry = HandleTableListHead.Flink;
+ NextTableEntry != &HandleTableListHead;
+ NextTableEntry = NextTableEntry->Flink)
{
- ObDereferenceObject(pr);
- }
+ /* Get current handle table */
+ HandleTable = CONTAINING_RECORD(NextTableEntry, HANDLE_TABLE, HandleTableList);
- DPRINT("SystemHandleInformation 2\n");
+ /* Set the initial value and loop the entries */
+ Handle.Value = 0;
+ while ((HandleTableEntry = ExpLookupHandleTableEntry(HandleTable, Handle)))
+ {
+ /* Validate the entry */
+ if ((HandleTableEntry->Object) &&
+ (HandleTableEntry->NextFreeTableEntry != -2))
+ {
+ /* Increase of count of handles */
+ ++HandleInformation->NumberOfHandles;
- curSize = sizeof(SYSTEM_HANDLE_INFORMATION) +
- ((sizeof(SYSTEM_HANDLE_TABLE_ENTRY_INFO) * hCount) -
- (sizeof(SYSTEM_HANDLE_TABLE_ENTRY_INFO)));
+ /* Lock the entry */
+ if (ExpLockHandleTableEntry(HandleTable, HandleTableEntry))
+ {
+ /* Increase required buffer size */
+ *ReqSize += sizeof(SYSTEM_HANDLE_TABLE_ENTRY_INFO);
- Shi->NumberOfHandles = hCount;
+ /* Check user's buffer size */
+ if (*ReqSize > Size)
+ {
+ Status = STATUS_INFO_LENGTH_MISMATCH;
+ }
+ else
+ {
+ POBJECT_HEADER ObjectHeader = ObpGetHandleObject(HandleTableEntry);
- if (curSize > Size)
- {
- *ReqSize = curSize;
- return (STATUS_INFO_LENGTH_MISMATCH);
- }
+ /* Filling handle information */
+ HandleInformation->Handles[Index].UniqueProcessId =
+ (USHORT)(ULONG_PTR) HandleTable->UniqueProcessId;
- DPRINT("SystemHandleInformation 3\n");
+ HandleInformation->Handles[Index].CreatorBackTraceIndex = 0;
- /* Now get Handles from all processes. */
- syspr = PsGetNextProcess(NULL);
- pr = syspr;
+#if 0 /* FIXME!!! Type field currupted */
+ HandleInformation->Handles[Index].ObjectTypeIndex =
+ (UCHAR) ObjectHeader->Type->Index;
+#else
+ HandleInformation->Handles[Index].ObjectTypeIndex = 0;
+#endif
- do
- {
- int Count = 0, HandleCount;
+ HandleInformation->Handles[Index].HandleAttributes =
+ HandleTableEntry->ObAttributes & OBJ_HANDLE_ATTRIBUTES;
- HandleCount = ObGetProcessHandleCount(pr);
+ HandleInformation->Handles[Index].HandleValue =
+ (USHORT)(ULONG_PTR) Handle.GenericHandleOverlay;
- for (Count = 0; HandleCount > 0 ; HandleCount--)
- {
- Shi->Handles[i].UniqueProcessId = (USHORT)(ULONG_PTR)pr->UniqueProcessId;
- Count++;
- i++;
- }
+ HandleInformation->Handles[Index].Object = &ObjectHeader->Body;
- pr = PsGetNextProcess(pr);
+ HandleInformation->Handles[Index].GrantedAccess =
+ HandleTableEntry->GrantedAccess;
- if ((pr == syspr) || (pr == NULL)) break;
+ ++Index;
+ }
+
+ /* Unlock it */
+ ExUnlockHandleTableEntry(HandleTable, HandleTableEntry);
+ }
+ }
+
+ /* Go to the next entry */
+ Handle.Value += sizeof(HANDLE);
+ }
}
- while ((pr != syspr) && (pr != NULL));
- if(pr != NULL) ObDereferenceObject(pr);
+ /* Release the lock */
+ ExReleasePushLockShared(&HandleTableListLock);
- DPRINT("SystemHandleInformation 4\n");
- return STATUS_SUCCESS;
+ /* Leave the critical region */
+ KeLeaveCriticalRegion();
-}
-/*
-SSI_DEF(SystemHandleInformation)
-{
+ /* Release the locked user buffer */
+ ExUnlockUserBuffer(Mdl);
- return STATUS_SUCCESS;
+ return Status;
}
-*/
/* Class 17 - Information */
QSI_DEF(SystemObjectInformation)
projects / reactos.git / blobdiff