112 lines
2.3 KiB
C
112 lines
2.3 KiB
C
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/*++
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Copyright (c) 1991 Microsoft Corporation
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Module Name:
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getconfg.c
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Abstract:
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This routine calls GetComputerName[A,W] to obtain the computer name
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in both Ansi and Unicode
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Author:
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Dan Lafferty (danl) 09-Apr-1991
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Environment:
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User Mode -Win32 (also uses nt RTL routines)
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Revision History:
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09-Apr-1991 danl
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created
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--*/
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#include <nt.h> // DbgPrint prototype
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#include <ntrtl.h> // DbgPrint prototype
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#include <nturtl.h>
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#include <ntdef.h>
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#include <windef.h>
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#include <winbase.h> // LocalAlloc
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DWORD
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ElfpGetComputerName (
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OUT LPSTR *ComputerNamePtrA,
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OUT LPWSTR *ComputerNamePtrW
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)
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/*++
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Routine Description:
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This routine obtains the computer name from a persistent database,
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by calling the GetcomputerName[A,W] Win32 Base APIs
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This routine assumes the length of the computername is no greater
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than MAX_COMPUTERNAME_LENGTH, space for which it allocates using
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LocalAlloc. It is necessary for the user to free that space using
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LocalFree when finished.
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Arguments:
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ComputerNamePtrA - Pointer to the location of the Ansi computer name
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ComputerNamePtrW - Pointer to the location of the Unicode computer name
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Return Value:
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NO_ERROR - If the operation was successful.
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Any other Win32 error if unsuccessful
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--*/
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{
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DWORD dwError = NO_ERROR;
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DWORD nSize = MAX_COMPUTERNAME_LENGTH + 1;
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//
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// Allocate a buffer to hold the largest possible computer name.
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//
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*ComputerNamePtrA = LocalAlloc(LMEM_ZEROINIT, nSize);
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*ComputerNamePtrW = LocalAlloc(LMEM_ZEROINIT, nSize * sizeof(WCHAR));
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if (*ComputerNamePtrA == NULL || *ComputerNamePtrW == NULL) {
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goto CleanExit;
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}
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//
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// Get the computer name string into the locally allocated buffers
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// by calling the Win32 GetComputerName[A,W] APIs.
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//
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if (!GetComputerNameA(*ComputerNamePtrA, &nSize)) {
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goto CleanExit;
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}
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//
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// GetComputerName always updates nSize
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//
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nSize = MAX_COMPUTERNAME_LENGTH + 1;
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if (!GetComputerNameW(*ComputerNamePtrW, &nSize)) {
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goto CleanExit;
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}
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return (NO_ERROR);
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CleanExit:
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dwError = GetLastError();
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LocalFree(*ComputerNamePtrA);
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LocalFree(*ComputerNamePtrW);
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*ComputerNamePtrA = NULL;
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*ComputerNamePtrW = NULL;
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return (dwError);
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}
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