155 lines
4.0 KiB
C
155 lines
4.0 KiB
C
/*++
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Copyright (c) 1989 Microsoft Corporation
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Module Name:
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copy.c
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Abstract:
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This module contains the routine to copy a file.
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Author:
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Dan Hinsley (DanHi) 24-Feb-1991
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Revision History:
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02-Feb-1994 Danl
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Fixed memory leak where ioBuffer wasn't getting free'd when doing
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an error exit from ElfpCopyFile.
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--*/
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// INCLUDES
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#include <eventp.h>
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NTSTATUS
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ElfpCopyFile(
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IN HANDLE SourceHandle,
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IN PUNICODE_STRING TargetFileName
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)
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/*++
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Routine Description:
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This routine copies or appends from the source file to the target file.
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If the target file already exists, the copy fails.
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Arguments:
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SourceHandle - An open handle to the source file.
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TargetFileName - The name of the file to copy to.
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Return Value:
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NTSTATUS - STATUS_SUCCESS or error.
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--*/
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{
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NTSTATUS Status;
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IO_STATUS_BLOCK IoStatusBlock;
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FILE_STANDARD_INFORMATION sourceStandardInfo;
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OBJECT_ATTRIBUTES ObjectAttributes;
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HANDLE TargetHandle;
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PCHAR ioBuffer;
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ULONG ioBufferSize;
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ULONG bytesRead;
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// Get the size of the file so we can set the attributes of the target
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// file.
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Status = NtQueryInformationFile(
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SourceHandle,
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&IoStatusBlock,
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&sourceStandardInfo,
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sizeof(sourceStandardInfo),
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FileStandardInformation
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);
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if (!NT_SUCCESS(Status)) {
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return(Status);
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}
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// Open the target file, fail if the file already exists.
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InitializeObjectAttributes(
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&ObjectAttributes,
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TargetFileName,
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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 = NtCreateFile(&TargetHandle,
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GENERIC_WRITE | SYNCHRONIZE,
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&ObjectAttributes,
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&IoStatusBlock,
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&(sourceStandardInfo.EndOfFile),
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FILE_ATTRIBUTE_NORMAL,
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0, // Share access
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FILE_CREATE,
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FILE_SYNCHRONOUS_IO_ALERT | FILE_SEQUENTIAL_ONLY,
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NULL, // EA buffer
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0 // EA length
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);
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if (!NT_SUCCESS(Status)) {
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return(Status);
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}
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// Allocate a buffer to use for the data copy.
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ioBufferSize = 4096;
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ioBuffer = ElfpAllocateBuffer(ioBufferSize);
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if (ioBuffer == NULL) {
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return (STATUS_NO_MEMORY);
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}
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// Copy data--read from source, write to target. Do this until
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// all the data is written or an error occurs.
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while (TRUE) {
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Status = NtReadFile(
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SourceHandle,
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NULL, // Event
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NULL, // ApcRoutine
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NULL, // ApcContext
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&IoStatusBlock,
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ioBuffer,
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ioBufferSize,
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NULL, // ByteOffset
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NULL // Key
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);
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if (!NT_SUCCESS(Status) && Status != STATUS_END_OF_FILE) {
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ElfDbgPrint(("[ELF] Copy failed reading source file - %X\n",
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Status));
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ElfpFreeBuffer(ioBuffer);
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return (Status);
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}
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if (IoStatusBlock.Information == 0 || Status == STATUS_END_OF_FILE) {
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break;
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}
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bytesRead = (ULONG)IoStatusBlock.Information;
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Status = NtWriteFile(
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TargetHandle,
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NULL, // Event
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NULL, // ApcRoutine
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NULL, // ApcContext
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&IoStatusBlock,
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ioBuffer,
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bytesRead,
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NULL, // ByteOffset
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NULL // Key
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);
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if (!NT_SUCCESS(Status)) {
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ElfDbgPrint(("[ELF] Copy failed writing target file - %X\n",
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Status));
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ElfpFreeBuffer(ioBuffer);
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return (Status);
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}
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}
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ElfpFreeBuffer(ioBuffer);
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Status = NtClose(TargetHandle);
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ASSERT(NT_SUCCESS(Status));
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return STATUS_SUCCESS;
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} // ElfpCopyFile
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