415 lines
14 KiB
C
415 lines
14 KiB
C
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#include "precomp.h"
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#pragma hdrstop
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#define BUFFERSIZE 1024
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typedef struct _DEVICEINFO {
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BOOL DevNodeStarted;
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} DEVICEINFO, *PDEVICEINFO;
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BOOL
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IsDriverLoaded(
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PTSTR ServiceName
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)
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{
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NTSTATUS Status;
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BOOL bObjectIsLoaded = FALSE;
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UCHAR Buffer[BUFFERSIZE];
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UNICODE_STRING UnicodeStringDriver, UnicodeStringServiceName;
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OBJECT_ATTRIBUTES Attributes;
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HANDLE DirectoryHandle;
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POBJECT_DIRECTORY_INFORMATION DirInfo;
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POBJECT_NAME_INFORMATION NameInfo;
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ULONG Context = 0;
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ULONG ReturnedLength;
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RtlZeroMemory(Buffer, BUFFERSIZE);
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RtlInitUnicodeString(&UnicodeStringServiceName, ServiceName);
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RtlInitUnicodeString(&UnicodeStringDriver, TEXT("\\Driver"));
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InitializeObjectAttributes(&Attributes,
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&UnicodeStringDriver,
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OBJ_CASE_INSENSITIVE,
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NULL,
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NULL
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);
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Status = NtOpenDirectoryObject(&DirectoryHandle,
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DIRECTORY_QUERY,
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&Attributes
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);
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if (!NT_SUCCESS(Status)) {
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printf("NtOpenDirectoryObject failed with 0x%X\n", Status);
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goto clean0;
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}
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//
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// Get the actual name of the object directory object.
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//
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NameInfo = (POBJECT_NAME_INFORMATION)&Buffer[0];
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if (!NT_SUCCESS(Status = NtQueryObject(DirectoryHandle,
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ObjectNameInformation,
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NameInfo,
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BUFFERSIZE,
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(PULONG)NULL))) {
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printf( "Unexpected error obtaining actual object directory name\n" );
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printf( "Error was: %X\n", Status );
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goto clean0;
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}
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//
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// Grab the driver objects in chuncks instead of one at a time.
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//
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for (Status = NtQueryDirectoryObject(DirectoryHandle,
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&Buffer,
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BUFFERSIZE,
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FALSE,
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FALSE,
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&Context,
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&ReturnedLength
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);
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NT_SUCCESS(Status) && !bObjectIsLoaded;
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Status = NtQueryDirectoryObject(DirectoryHandle,
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&Buffer,
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BUFFERSIZE,
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FALSE,
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FALSE,
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&Context,
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&ReturnedLength
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)) {
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if (!NT_SUCCESS(Status)) {
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if (Status != STATUS_NO_MORE_FILES) {
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printf("NtQueryDirectoryObject failed with 0x%X\n", Status);
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}
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break;
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}
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DirInfo = (POBJECT_DIRECTORY_INFORMATION)&Buffer[0];
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while (TRUE) {
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//
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// Check if there is another record. If there isn't, then get out
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// of the loop now.
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//
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if (DirInfo->Name.Length == 0) {
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break;
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}
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if (RtlCompareUnicodeString(&UnicodeStringServiceName, &(DirInfo->Name), TRUE) == 0) {
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bObjectIsLoaded = TRUE;
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break;
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}
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DirInfo = (POBJECT_DIRECTORY_INFORMATION)(((PUCHAR)DirInfo) +
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sizeof(OBJECT_DIRECTORY_INFORMATION));
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}
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RtlZeroMemory(Buffer, BUFFERSIZE);
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}
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clean0:
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NtClose(DirectoryHandle);
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return bObjectIsLoaded;
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}
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BOOL
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RestartDevicesUsingService(
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LPTSTR ServiceName
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)
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{
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BOOL b = TRUE;
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CONFIGRET cr;
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DEVNODE DevNode;
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BOOL bIsDriverLoaded;
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INT count, i;
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TCHAR VetoName[512];
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ULONG VetoNameLength;
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PNP_VETO_TYPE VetoType;
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ULONG Status, Problem;
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ULONG BufferLen;
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OSVERSIONINFO osvi;
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PTSTR Buffer = NULL;
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PTSTR p;
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PDEVICEINFO DeviceInfo = NULL;
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printf("Stopping all devices that are using the service %ws\n", ServiceName);
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try {
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bIsDriverLoaded = IsDriverLoaded(ServiceName);
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printf("%ws %ws loaded\n",
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ServiceName,
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bIsDriverLoaded
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? TEXT("is")
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: TEXT("is NOT")
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);
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//
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// If this service is not loaded then we don't need to do anything.
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//
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if (!bIsDriverLoaded) {
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goto clean0;
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}
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//
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// Find out how large a buffer it will take to hold all the devices that
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// are using this service.
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//
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if (((cr = CM_Get_Device_ID_List_Size(&BufferLen,
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ServiceName,
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CM_GETIDLIST_FILTER_SERVICE
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)) != CR_SUCCESS) ||
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(BufferLen == 0)) {
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if (cr != CR_SUCCESS) {
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b = FALSE;
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printf("CM_Get_Device_ID_List_Size failed with 0x%X\n", cr);
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} else {
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printf("There are no devices using this service!\n");
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}
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goto clean0;
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}
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Buffer = LocalAlloc(LPTR, BufferLen*sizeof(TCHAR));
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if (Buffer == NULL) {
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b = FALSE;
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goto clean0;
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}
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//
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// Get all of the devices that are using this service.
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//
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if (CM_Get_Device_ID_List(ServiceName,
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Buffer,
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BufferLen,
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CM_GETIDLIST_FILTER_SERVICE | CM_GETIDLIST_DONOTGENERATE
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) != CR_SUCCESS) {
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b = FALSE;
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goto clean0;
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}
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//
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// Count up how many devices we are dealing with.
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//
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count = 0;
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for (p = Buffer; *p; p += (lstrlen(p) + 1)) {
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count++;
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}
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if (count == 0) {
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printf("There are no devices using this service!\n");
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goto clean0;
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}
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printf("%d devices are using this service\n", count);
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//
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// Allocate an array of our DEVICEINFO structures so we can keep
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// track of the Devnodes and whether a device was started or not
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// before we tried to unloade the specified driver.
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//
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DeviceInfo = LocalAlloc(LPTR, count*sizeof(DEVICEINFO));
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if (DeviceInfo == NULL) {
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b = FALSE;
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goto clean0;
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}
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//
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// Enumerate through all of the devices and stop each one.
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//
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for (p=Buffer, i=0; *p; p+=(lstrlen(p) + 1),i++) {
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printf("Stopping device %ws\n", p);
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if ((cr = CM_Locate_DevNode(&DevNode, p, 0)) == CR_SUCCESS) {
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if ((CM_Get_DevNode_Status(&Status, &Problem, DevNode, 0) == CR_SUCCESS) &&
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(Status & DN_STARTED)) {
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DeviceInfo[i].DevNodeStarted = TRUE;
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} else {
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printf("\tdevice is not started...skipping\n");
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DeviceInfo[i].DevNodeStarted = FALSE;
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continue;
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}
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//
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// We will pass in the VetoType and VetoName to
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// CM_Query_And_Remove_Subtree so we can log while a specific
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// device could not be stopped. This will also prevent the
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// kernel from poping up a dialog telling the user that the
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// device could not be removed.
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//
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// NOTE: It is important to note that on Whistler we pass in the
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// CM_REMOVE_NO_RESTART flag. This ensures that the devnode
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// will not be restarted until we call CM_Setup_DevNode to
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// restart it at a later time. Without this flag (like in
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// Windows 2000) it is possible for the device to restart again
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// due to some other program or driver triggering a
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// reenumeration.
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//
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VetoNameLength = sizeof(VetoName)/sizeof(TCHAR);
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cr = CM_Query_And_Remove_SubTree(DevNode,
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&VetoType,
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VetoName,
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VetoNameLength,
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CM_QUERY_REMOVE_UI_NOT_OK |
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CM_REMOVE_NO_RESTART
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);
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if (cr == CR_REMOVE_VETOED) {
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//
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// Someone vetoed the removal of this device!
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//
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// This is here for logging purposes only. If no logging is
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// required then there is no need for this check.
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//
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printf("\tVetoed 0x%X %ws\n", VetoType, VetoName);
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}
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if (cr != CR_SUCCESS) {
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//
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// If we couldn't stop one of the devices then we might as well
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// stop since we are going to need a reboot.
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//
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printf("\tFailed with 0x%X!\n", cr);
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b = FALSE;
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break;
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}
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} else {
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//
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// If we couldn't locate one of the devices then there is no need to
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// continue through the list since a reboot will be needed.
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//
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printf("\tCouldn't locate the devnode, error 0x%X!\n", cr);
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b = FALSE;
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break;
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}
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}
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printf("\n");
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if (b) {
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bIsDriverLoaded = IsDriverLoaded(ServiceName);
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printf("%ws %ws loaded\n\n",
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ServiceName,
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bIsDriverLoaded
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? TEXT("is")
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: TEXT("is NOT")
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);
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//
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// If the driver did not unload, even after we stopped all the
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// devices using it, the we need to reboot!
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//
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if (bIsDriverLoaded) {
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b = FALSE;
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}
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}
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//
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// At this point we need to enumerate through all the devices once again
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// and restart them all. It doesn't matter whether we succeeded or not in
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// stopping them all, we still need to restart them.
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//
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for (p=Buffer, i=0; *p; p+=(lstrlen(p) + 1), i++) {
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printf("Starting device %ws\n", p);
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if ((cr = CM_Locate_DevNode(&DevNode, p, 0)) == CR_SUCCESS) {
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//
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// NOTE: For Whistler we will call CM_Setup_DevNode with the
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// CM_SETUP_DEVNODE_RESET flag which will clear the
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// CM_REMOVE_NO_RESTART flag we set earlier. These two flags
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// ensure that the devnode will not get restarted by some other
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// program or driver until we want them to.
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//
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if ((cr = CM_Setup_DevNode(DevNode, CM_SETUP_DEVNODE_READY)) == CR_SUCCESS) {
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//
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// We successfully restarted the device, lets make sure that it
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// started and doesn't have any problems. We will only make
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// this check if the device was started before.
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//
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if (DeviceInfo[i].DevNodeStarted == TRUE) {
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if ((CM_Get_DevNode_Status(&Status, &Problem, DevNode, 0) != CR_SUCCESS) ||
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!(Status & DN_STARTED)) {
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//
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// We couldn't get the status of this device, or it did not
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// restart properly, so we will need to reboot.
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//
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printf("\tDevice could not be restarted!\n");
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b = FALSE;
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}
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}
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} else {
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//
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// We couldn't restart this device, so we will need to reboot.
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//
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printf("\tDevice could not be restarted, error 0x%X!\n", cr);
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b = FALSE;
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}
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} else {
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//
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// We couldn't locate the devnode to restart it.
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//
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printf("\tCouldn't locate the devnode, error 0x%X!\n", cr);
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b = FALSE;
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}
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}
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printf("%ws %ws loaded\n",
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ServiceName,
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IsDriverLoaded(ServiceName)
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? TEXT("is")
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: TEXT("is NOT")
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);
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} except(EXCEPTION_EXECUTE_HANDLER) {
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Buffer = Buffer;
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DeviceInfo = DeviceInfo;
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b = FALSE;
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}
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clean0:
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if (Buffer) {
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LocalFree(Buffer);
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}
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if (DeviceInfo) {
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LocalFree(DeviceInfo);
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}
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return b;
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}
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int
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__cdecl
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wmain(
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IN int argc,
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IN char *argv[]
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)
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{
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BOOL bDriverUnloaded;
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if (argc != 2) {
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printf("Usage: StopDevs X\n");
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printf("\twhere X is the name of the service.\n");
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return 0;
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}
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bDriverUnloaded = RestartDevicesUsingService((LPTSTR)argv[1]);
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if (bDriverUnloaded) {
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printf("\n\nThe driver unloaded, no need to reboot!\n\n");
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return 1;
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} else {
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||
|
|
printf("\n\nThe driver did NOT unload, a reboot is required!\n\n");
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|