Querying a Service's Configuration

In the following example, a service configuration program uses the OpenService function to get a handle with SERVICE_QUERY_CONFIG access to an installed service object. Then the program uses the service object handle in the QueryServiceConfig function to retrieve the current configuration of the service.

VOID GetSampleServiceConfig()

{

LPQUERY_SERVICE_CONFIG lpqscBuf;

DWORD dwBytesNeeded;

// Open a handle to the service.

schService = OpenService(

schSCManager, // SCManager database

TEXT("Sample_Srv"), // name of service

SERVICE_QUERY_CONFIG); // need QUERY access

if (schService == NULL)

MyErrorExit("OpenService");

// Allocate a buffer for the information configuration.

lpqscBuf = (LPQUERY_SERVICE_CONFIG) LocalAlloc(

LPTR, 4096);

if (lpqscBuf == NULL)

MyErrorExit("LocalAlloc");

// Get and print the information configuration.

if (! QueryServiceConfig(

schService,

lpqscBuf,

4096,

&dwBytesNeeded) )

{

MyErrorExit("QueryServiceConfig");

}

printf("\nSample_Srv configuration: \n");

printf(" Type: 0x%x\n", lpqscBuf->dwServiceType);

printf(" Start Type: 0x%x\n", lpqscBuf->dwStartType);

printf(" Err Control: 0x%x\n", lpqscBuf->dwErrorControl);

printf(" Binary path: %s\n", lpqscBuf->lpBinaryPathName);

if (lpqscBuf->lpLoadOrderGroup != NULL)

printf(" Load order group: %s\n",

lpqscBuf->lpLoadOrderGroup);

if (lpqscBuf->dwTagId != 0)

printf(" Tag ID: %d\n", lpqscBuf->dwTagId);

if (lpqscBuf->lpDependencies != NULL)

printf(" Dependencies: %s\n", lpqscBuf->lpDependencies);

if (lpqscBuf->lpServiceStartName != NULL)

printf(" Start Name: %s\n",

lpqscBuf->lpServiceStartName);

LocalFree(lpqscBuf);

}

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