From 44cd7009fb10f192e798b6e5485756ede042d096 Mon Sep 17 00:00:00 2001
From: midipix <writeonce@midipix.org>
Date: Jun 26 2020 20:48:26 +0000
Subject: helper api: added toks_uuid_from_path().


---

diff --git a/include/toksvc/toksvc.h b/include/toksvc/toksvc.h
index 1621214..a3d0806 100644
--- a/include/toksvc/toksvc.h
+++ b/include/toksvc/toksvc.h
@@ -189,6 +189,7 @@ toks_api int  toks_output_error_record  (const struct toks_driver_ctx *, const s
 toks_api int  toks_output_error_vector  (const struct toks_driver_ctx *);
 
 /* helper api */
+toks_api  int  toks_uuid_from_path      (const char *, struct _nt_guid *);
 toks_api  int  toks_string_to_guid      (const char (*)[40], struct _nt_guid *);
 toks_api  void toks_guid_to_string      (const struct _nt_guid *, char (*)[40]);
 
diff --git a/project/common.mk b/project/common.mk
index 5f8b868..3b96261 100644
--- a/project/common.mk
+++ b/project/common.mk
@@ -19,6 +19,7 @@ INTERNAL_SRCS = \
 	src/driver/toks_amain.c \
 	src/driver/toks_driver_ctx.c \
 	src/helper/toks_guid_string.c \
+	src/helper/toks_uuid_from_path.c \
 	src/internal/nolibc/toksvc_compiler.c \
 	src/internal/toksvc_dprintf_impl.c \
 	src/internal/toksvc_log_impl.c \
diff --git a/src/helper/toks_uuid_from_path.c b/src/helper/toks_uuid_from_path.c
new file mode 100644
index 0000000..34fc83a
--- /dev/null
+++ b/src/helper/toks_uuid_from_path.c
@@ -0,0 +1,89 @@
+/*********************************************************/
+/*  toksvc: a framework-native token broker service      */
+/*  Copyright (C) 2020  Z. Gilboa                        */
+/*  Released under GPLv2 and GPLv3; see COPYING.TOKSVC.  */
+/*********************************************************/
+
+#include <psxtypes/psxtypes.h>
+#include <ntapi/nt_object.h>
+#include <ntapi/nt_fsctl.h>
+#include <ntapi/nt_guid.h>
+#include <ntapi/ntapi.h>
+
+#include <toksvc/toksvc.h>
+#include "toksvc_init_impl.h"
+#include "toksvc_driver_impl.h"
+#include "toksvc_nolibc_impl.h"
+
+static int32_t toks_uuid_path_open(void ** hfile, const char * path)
+{
+	return toks_open_dir(hfile,0,path,true)
+		? toks_open_file(hfile,0,path,true)
+		: NT_STATUS_SUCCESS;
+}
+
+int toks_uuid_from_path(const char * path, struct _nt_guid * uuid)
+{
+	int32_t                         status;
+	void *				hfile;
+	void *				hevent;
+	nt_iosb                         iosb;
+	nt_file_object_id_buffer        objid;
+
+	toks_init();
+
+	if ((status = toks_uuid_path_open(&hfile,path)))
+		return status;
+
+	status = ntapi->tt_create_private_event(
+		&hevent,
+		NT_NOTIFICATION_EVENT,
+		NT_EVENT_NOT_SIGNALED);
+
+	if (status) {
+		ntapi->zw_close(hfile);
+		return status;
+	}
+
+	iosb.status = NT_STATUS_PENDING;
+
+	status = ntapi->zw_fs_control_file(
+		hfile,
+		hevent,0,0,
+		&iosb,
+		NT_FSCTL_CREATE_OR_GET_OBJECT_ID,
+		0,0,&objid,sizeof(objid));
+
+	if (status == NT_STATUS_PENDING)
+		ntapi->zw_wait_for_single_object(
+			hevent,
+			NT_SYNC_NON_ALERTABLE,
+			0);
+
+	ntapi->zw_close(hfile);
+	ntapi->zw_close(hevent);
+
+	if (iosb.status == NT_STATUS_SUCCESS) {
+		uuid->data1    = (objid.obj_id[0]);
+		uuid->data1   |= (objid.obj_id[1] << 8);
+		uuid->data1   |= (objid.obj_id[2] << 16);
+		uuid->data1   |= (objid.obj_id[3] << 24);
+
+		uuid->data2    = (objid.obj_id[4]);
+		uuid->data2   |= (objid.obj_id[5] << 8);
+
+		uuid->data3    = (objid.obj_id[6]);
+		uuid->data3   |= (objid.obj_id[7] << 8);
+
+		uuid->data4[0] = (objid.obj_id[8]);
+		uuid->data4[1] = (objid.obj_id[9]);
+		uuid->data4[2] = (objid.obj_id[10]);
+		uuid->data4[3] = (objid.obj_id[11]);
+		uuid->data4[4] = (objid.obj_id[12]);
+		uuid->data4[5] = (objid.obj_id[13]);
+		uuid->data4[6] = (objid.obj_id[14]);
+		uuid->data4[7] = (objid.obj_id[15]);
+	}
+
+	return iosb.status;
+}