90 lines
2.5 KiB
C
90 lines
2.5 KiB
C
// dismount.c
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#include <stdio.h>
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#include <string.h>
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#include <nt.h>
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#include <ntrtl.h>
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#include <nturtl.h>
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#include <windows.h>
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#include <ntioapi.h>
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VOID
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_cdecl
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main(
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int argc,
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char *argv[]
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)
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{
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HANDLE Volume;
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IO_STATUS_BLOCK IoStatusBlock;
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NTSTATUS Status;
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OBJECT_ATTRIBUTES ObjAttr;
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ANSI_STRING AnsiName;
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UNICODE_STRING UnicodeName;
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char DriveNameBuffer[32];
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//
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// Get parameter
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//
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if (argc < 2) {
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printf("This program dismounts a volume.\n\n");
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printf("usage: %s <driveletter>:\n", argv[0]);
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return;
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}
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strcpy( DriveNameBuffer, "\\DosDevices\\" );
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strcat( DriveNameBuffer, argv[1] );
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RtlInitAnsiString( &AnsiName, DriveNameBuffer );
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Status = RtlAnsiStringToUnicodeString( &UnicodeName, &AnsiName, TRUE );
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if (!NT_SUCCESS(Status)) {
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printf( "Error initalizing strings" );
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return;
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}
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RtlZeroMemory( &ObjAttr, sizeof(OBJECT_ATTRIBUTES) );
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ObjAttr.Length = sizeof(OBJECT_ATTRIBUTES);
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ObjAttr.ObjectName = &UnicodeName;
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ObjAttr.Attributes = OBJ_CASE_INSENSITIVE;
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Status = NtOpenFile( &Volume,
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SYNCHRONIZE | FILE_READ_DATA | FILE_WRITE_DATA,
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&ObjAttr,
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&IoStatusBlock,
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FILE_SHARE_READ | FILE_SHARE_WRITE,
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FILE_SYNCHRONOUS_IO_ALERT );
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if (Volume == INVALID_HANDLE_VALUE) {
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printf( "Error opening file %s %x\n", argv[1], GetLastError() );
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return;
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}
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Status = NtFsControlFile( Volume, // file handle
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NULL, // event
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NULL, // apc routine
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NULL, // apc context
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&IoStatusBlock, // iosb
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FSCTL_DISMOUNT_VOLUME, // FsControlCode
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NULL, // input buffer
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0, // input buffer length
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NULL, // OutputBuffer for data from the FS
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0); // OutputBuffer Length
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if (Status == STATUS_SUCCESS) {
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printf( "\nDismount succeeded." );
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} else {
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printf( "\nDismount failed with status %x", Status );
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}
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CloseHandle( Volume );
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}
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