entered advanced internal development stage.

1 files changed, 129 insertions, 0 deletions

diff --git a/src/fs/ntapi_tt_stat.c b/src/fs/ntapi_tt_stat.c
new file mode 100644
index 0000000..51cc55a
--- /dev/null
+++ b/src/fs/ntapi_tt_stat.c
@@ -0,0 +1,129 @@
+/********************************************************/
+/*  ntapi: Native API core library                      */
+/*  Copyright (C) 2013,2014,2015  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,
+	__in	void *			hroot	__optional,
+	__in	nt_unicode_string *	path,
+	__out	nt_stat *		stat,
+	__out	uintptr_t *		buffer,
+	__in	uint32_t		buffer_size,
+	__in	uint32_t		open_options,
+	__in	uint32_t		flags)
+{
+	int32_t			status;
+	nt_oa			oa;
+	nt_iosb			iosb;
+	nt_unicode_string *	sdev;
+	nt_fai *		fai;
+
+	/* validation */
+	if (!hfile && !path)
+		return NT_STATUS_INVALID_HANDLE;
+
+	/* hfile */
+	if (!hfile) {
+		/* oa */
+		oa.len = sizeof(nt_oa);
+		oa.root_dir = hroot;
+		oa.obj_name = path;
+		oa.obj_attr = 0;
+		oa.sec_desc = 0;
+		oa.sec_qos = 0;
+
+		/* open file/folder */
+		status = __ntapi->zw_open_file(
+			&hfile,
+			NT_SEC_SYNCHRONIZE | NT_FILE_READ_ATTRIBUTES | NT_FILE_READ_ACCESS,
+			&oa,
+			&iosb,
+			NT_FILE_SHARE_READ | NT_FILE_SHARE_WRITE,
+			open_options | NT_FILE_SYNCHRONOUS_IO_ALERT);
+
+		if (status != NT_STATUS_SUCCESS)
+			return status;
+
+		stat->flags_out = NT_STAT_NEW_HANDLE;
+	}
+
+	stat->hfile    = hfile;
+	stat->flags_in = flags;
+
+	/* system-unique device name */
+	status = __ntapi->zw_query_information_file(
+		hfile,
+		&iosb,
+		buffer,
+		buffer_size,
+		NT_FILE_ALL_INFORMATION);
+
+	if (status != NT_STATUS_SUCCESS)
+		return status;
+
+	/* copy file info minus name */
+	fai = (nt_fai *)buffer;
+	__ntapi->tt_aligned_block_memcpy(
+		(uintptr_t *)stat,
+		(uintptr_t *)fai,
+		((size_t)(&((nt_fai *)0)->name_info)));
+
+	/* record the file name length, but do not hash */
+	stat->file_name_length = fai->name_info.file_name_length;
+	stat->file_name_hash   = 0;
+
+
+	/* file system size information */
+	status = __ntapi->zw_query_volume_information_file(
+		hfile,
+		&iosb,
+		&(stat->fssi),
+		sizeof(stat->fssi),
+		NT_FILE_FS_SIZE_INFORMATION);
+
+	if (status != NT_STATUS_SUCCESS)
+		return status;
+
+	/* system-unique device name (simpler than statfs) */
+	iosb.info = 0;
+	status = __ntapi->zw_query_object(
+		hfile,
+		NT_OBJECT_NAME_INFORMATION,
+		buffer,
+		buffer_size,
+		(uint32_t *)&iosb.info);
+
+	if (status != NT_STATUS_SUCCESS)
+		return status;
+
+	sdev = (nt_unicode_string *)buffer;
+	stat->dev_name_strlen = sdev->strlen - (uint16_t)stat->file_name_length;
+
+	stat->dev_name_hash = __ntapi->tt_buffer_crc32(
+		0,
+		sdev->buffer,
+		stat->dev_name_strlen);
+
+	if (flags & NT_STAT_DEV_NAME_COPY) {
+		if (stat->dev_name_maxlen < sdev->strlen)
+			/* does not justify failure */
+			*stat->dev_name = 0;
+		else
+			__ntapi->tt_memcpy_utf16(
+				(wchar16_t *)stat->dev_name,
+				(wchar16_t *)sdev->buffer,
+				stat->dev_name_strlen);
+	} else
+		*stat->dev_name = 0;
+
+	return status;
+}