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/********************************************************/
/* ntapi: Native API core library */
/* Copyright (C) 2013--2016 Z. Gilboa */
/* Released under GPLv2 and GPLv3; see COPYING.NTAPI. */
/********************************************************/
#include <ntapi/ntapi.h>
#include <ntapi/nt_file.h>
#include "ntapi_impl.h"
int32_t __stdcall __ntapi_tt_open_physical_parent_directory(
__out void ** hparent,
__in void * hdir,
__out uintptr_t * buffer,
__in uint32_t buffer_size,
__in uint32_t desired_access,
__in uint32_t open_options,
__out int32_t * type)
{
int32_t status;
nt_oa oa;
nt_iosb iosb;
wchar16_t * wch;
wchar16_t * root;
nt_unicode_string * path;
uint32_t len;
(void)type;
path = (nt_unicode_string *)buffer;
if ((status = __ntapi->zw_query_object(
hdir,
NT_OBJECT_NAME_INFORMATION,
path,
buffer_size,
&len)))
return status;
/* integrity */
if (len == sizeof(nt_unicode_string))
return NT_STATUS_BAD_FILE_TYPE;
/* device root directory */
root = path->buffer;
wch = path->buffer + (path->strlen / sizeof(uint16_t));
if ((root[0] != '\\')
|| (root[1] != 'D') || (root[2] != 'e')
|| (root[3] != 'v') || (root[4] != 'i')
|| (root[5] != 'c') || (root[6] != 'e')
|| (root[7] != '\\'))
return NT_STATUS_INTERNAL_ERROR;
for (root=&root[8]; (root<wch) && (*root!='\\'); )
root++;
if ((uint16_t)((++root - path->buffer) * sizeof(uint16_t)) == path->strlen)
return NT_STATUS_MORE_PROCESSING_REQUIRED;
/* physical parent directory path */
for (; (wch>root) && (wch[-1]!='\\'); )
wch--;
path->strlen = sizeof(uint16_t) * (uint16_t)(wch-path->buffer);
path->maxlen = 0;
/* oa */
oa.len = sizeof(nt_oa);
oa.root_dir = 0;
oa.obj_name = path;
oa.obj_attr = 0;
oa.sec_desc = 0;
oa.sec_qos = 0;
/* default access */
desired_access = desired_access
? desired_access
: NT_SEC_SYNCHRONIZE | NT_FILE_READ_ATTRIBUTES | NT_FILE_READ_ACCESS;
/* open parent directory */
return __ntapi->zw_open_file(
hparent,
desired_access,
&oa,
&iosb,
NT_FILE_SHARE_READ | NT_FILE_SHARE_WRITE,
open_options | NT_FILE_DIRECTORY_FILE);
}
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