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/********************************************************/
/* ntapi: Native API core library */
/* Copyright (C) 2013--2017 Z. Gilboa */
/* Released under GPLv2 and GPLv3; see COPYING.NTAPI. */
/********************************************************/
#include <ntapi/ntapi.h>
#include <ntapi/nt_file.h>
#include <ntapi/nt_fsctl.h>
#include <ntapi/nt_mount.h>
#include <ntapi/nt_stat.h>
#include "ntapi_impl.h"
int32_t __stdcall __ntapi_tt_stat(
__in void * hfile,
__out nt_stat * stat,
__in uint32_t infolen,
__out uintptr_t * buffer,
__in uint32_t buffer_size,
__in uint32_t flags)
{
int32_t status;
nt_iosb iosb;
nt_unicode_string * sdev;
nt_fai * fai;
wchar16_t * wch;
wchar16_t * wch_mark;
uint32_t hash;
uint32_t written;
/* validation */
if (infolen < sizeof(*stat))
return NT_STATUS_INFO_LENGTH_MISMATCH;
/* init */
__ntapi->tt_aligned_block_memset(
stat,0,sizeof(*stat));
stat->hfile = hfile;
stat->dev_name_maxlen = (uint16_t)infolen - sizeof(*stat);
/* sigh */
if (buffer_size >= 65536)
buffer_size = 65535;
/* system-unique device name */
if ((status = __ntapi->zw_query_information_file(
hfile,
&iosb,
buffer,
buffer_size,
NT_FILE_ALL_INFORMATION)))
return status;
/* copy file info minus name */
__ntapi->tt_aligned_block_memcpy(
(uintptr_t *)stat,
(uintptr_t *)buffer,
__offsetof(nt_fai,name_info));
/* record volume-relative file name length */
fai = (nt_fai *)buffer;
stat->file_name_length = fai->name_info.file_name_length;
/* file system size information */
if ((status = __ntapi->zw_query_volume_information_file(
hfile,
&iosb,
&(stat->fssi),
sizeof(stat->fssi),
NT_FILE_FS_SIZE_INFORMATION)))
return status;
/* system-unique device name */
if ((status = __ntapi->zw_query_object(
hfile,
NT_OBJECT_NAME_INFORMATION,
buffer,
buffer_size,
&written)))
return status;
sdev = (nt_unicode_string *)buffer;
wch = sdev->buffer;
if (sdev->strlen < __DEVICE_PATH_PREFIX_LEN)
return NT_STATUS_NOT_SUPPORTED;
if ((wch[0] != '\\')
|| (wch[1] != 'D')
|| (wch[2] != 'e')
|| (wch[3] != 'v')
|| (wch[4] != 'i')
|| (wch[5] != 'c')
|| (wch[6] != 'e')
|| (wch[7] != '\\'))
return NT_STATUS_NOT_SUPPORTED;
if ((sdev->strlen >= __DEVICE_MUP_PREFIX_LEN)
&& (wch[8]=='M')
&& (wch[9]=='u')
&& (wch[10]=='p')
&& (wch[11]=='\\')) {
hash = __DEVICE_MUP_PREFIX_HASH;
stat->flags |= NT_STAT_MUP_DEVICE;
wch_mark = &wch[12];
wch = wch_mark;
for (; *wch!='\\'; )
wch++;
wch++;
} else {
wch_mark = &wch[8];
wch = wch_mark;
hash = __DEVICE_PATH_PREFIX_HASH;
}
for (; *wch!='\\'; )
wch++;
stat->obj_name_strlen = sdev->strlen;
stat->obj_name_maxlen = stat->dev_name_maxlen;
stat->dev_name_strlen = sizeof(uint16_t) * (uint16_t)(wch - sdev->buffer);
stat->dev_name_hash = __ntapi->tt_buffer_crc32(
hash,wch_mark,
sizeof(wchar16_t) * (wch - wch_mark));
if (!(flags & NT_STAT_DEV_NAME_COPY))
return NT_STATUS_SUCCESS;
else if (stat->dev_name_maxlen < sdev->strlen)
return NT_STATUS_BUFFER_TOO_SMALL;
__ntapi->tt_memcpy_utf16(
(wchar16_t *)stat->dev_name,
(wchar16_t *)sdev->buffer,
sdev->strlen);
return NT_STATUS_SUCCESS;
}
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