subsystem interfaces: integrated sysv semaphore client-side interfaces.

8 files changed, 823 insertions, 0 deletions

diff --git a/src/internal/ntapi.c b/src/internal/ntapi.c
index 42812c0..2459534 100644
--- a/src/internal/ntapi.c
+++ b/src/internal/ntapi.c
@@ -191,6 +191,16 @@ static int32_t __fastcall __ntapi_init_once(ntapi_vtbl ** pvtbl)
 	__ntapi->ipc_init_section_by_port			= __ntapi_ipc_init_section_by_port;
 	__ntapi->ipc_disconnect_unmap_section_by_port		= __ntapi_ipc_disconnect_unmap_section_by_port;
 
+	/* nt_sem.h */
+	__ntapi->sem_create					= __ntapi_sem_create;
+	__ntapi->sem_open					= __ntapi_sem_open;
+	__ntapi->sem_fcntl					= __ntapi_sem_fcntl;
+	__ntapi->sem_ioctl					= __ntapi_sem_ioctl;
+	__ntapi->sem_query					= __ntapi_sem_query;
+	__ntapi->sem_set					= __ntapi_sem_set;
+	__ntapi->sem_cancel					= __ntapi_sem_cancel;
+	__ntapi->sem_free					= __ntapi_sem_free;
+
 	/* nt_ldr.h */
 	__ntapi->ldr_load_system_dll				= __ntapi_ldr_load_system_dll;
 	__ntapi->ldr_create_state_snapshot			= __ntapi_ldr_create_state_snapshot;
diff --git a/src/internal/ntapi_fnapi.h b/src/internal/ntapi_fnapi.h
index 39f8ac3..e7cb5ae 100644
--- a/src/internal/ntapi_fnapi.h
+++ b/src/internal/ntapi_fnapi.h
@@ -59,6 +59,16 @@ ntapi_ipc_disconnect_unmap_section_by_port	__ntapi_ipc_disconnect_unmap_section_
 ntapi_ipc_create_pipe				__ntapi_ipc_create_pipe_v1;
 ntapi_ipc_create_pipe				__ntapi_ipc_create_pipe_v2;
 
+/* nt_sem.h */
+ntapi_sem_create				__ntapi_sem_create;
+ntapi_sem_open					__ntapi_sem_open;
+ntapi_sem_fcntl					__ntapi_sem_fcntl;
+ntapi_sem_ioctl					__ntapi_sem_ioctl;
+ntapi_sem_query					__ntapi_sem_query;
+ntapi_sem_set					__ntapi_sem_set;
+ntapi_sem_cancel				__ntapi_sem_cancel;
+ntapi_sem_free					__ntapi_sem_free;
+
 /* nt_ldr */
 ntapi_ldr_load_system_dll			__ntapi_ldr_load_system_dll;
 ntapi_ldr_create_state_snapshot			__ntapi_ldr_create_state_snapshot;
diff --git a/src/sem/ntapi_sem_connect.c b/src/sem/ntapi_sem_connect.c
new file mode 100644
index 0000000..32c3610
--- /dev/null
+++ b/src/sem/ntapi_sem_connect.c
@@ -0,0 +1,335 @@
+/********************************************************/
+/*  ntapi: Native API core library                      */
+/*  Copyright (C) 2013--2017  Z. Gilboa                 */
+/*  Released under GPLv2 and GPLv3; see COPYING.NTAPI.  */
+/********************************************************/
+
+#include <psxtypes/psxtypes.h>
+#include <ntapi/nt_file.h>
+#include <ntapi/nt_string.h>
+#include <ntapi/nt_atomic.h>
+#include <ntapi/nt_port.h>
+#include <ntapi/nt_ipc.h>
+#include <ntapi/nt_sem.h>
+#include <ntapi/ntapi.h>
+#include "ntapi_impl.h"
+
+static const nt_guid	g_sempid    = NT_IPC_GUID_SEMPID;
+static const wchar16_t	p_sempid[6] = NT_IPC_OBJDIR_PREFIX_SEMPID;
+
+static int32_t __semctl_get_service_attr(
+	nt_rtdata *		rtdata,
+	nt_tty_service_info *	semctl)
+{
+	nt_iosb iosb;
+
+	/* inherited runtime data? */
+	if (rtdata->semctl_keys[0]) {
+		semctl->attr.ver_major = 0;
+		semctl->attr.ver_minor = 0;
+		semctl->attr.options   = 0;
+		semctl->attr.flags     = 0;
+
+		semctl->attr.type    = rtdata->semctl_type;
+		semctl->attr.subtype = rtdata->semctl_subtype;
+
+		semctl->attr.keys.key[0] = rtdata->semctl_keys[0];
+		semctl->attr.keys.key[1] = rtdata->semctl_keys[1];
+		semctl->attr.keys.key[2] = rtdata->semctl_keys[2];
+		semctl->attr.keys.key[3] = rtdata->semctl_keys[3];
+		semctl->attr.keys.key[4] = rtdata->semctl_keys[4];
+		semctl->attr.keys.key[5] = rtdata->semctl_keys[5];
+
+		__ntapi->tt_guid_copy(
+			&semctl->attr.guid,
+			&rtdata->semctl_guid);
+
+		return NT_STATUS_SUCCESS;
+	}
+
+	/* obtain service info */
+	return __ntapi->tty_query_information_service(
+		0,&iosb,
+		semctl,&(nt_guid)NT_PORT_GUID_SEMCTL,
+		0,0);
+}
+
+static int32_t __semctl_server_connect(
+	nt_rtdata *		rtdata,
+	nt_tty_service_info *	semctl)
+{
+	int32_t status;
+
+	/* already cononected? */
+	if (rtdata->hsemctl)
+		return NT_STATUS_SUCCESS;
+
+	/* connect */
+	if ((status = __ntapi->ipc_connect_by_attr(
+			&rtdata->hsemctl,
+			&semctl->attr)))
+		return status;
+
+	/* update */
+	rtdata->semctl_type    = semctl->attr.type;
+	rtdata->semctl_subtype = semctl->attr.subtype;
+
+	rtdata->semctl_keys[0] = semctl->attr.keys.key[0];
+	rtdata->semctl_keys[1] = semctl->attr.keys.key[1];
+	rtdata->semctl_keys[2] = semctl->attr.keys.key[2];
+	rtdata->semctl_keys[3] = semctl->attr.keys.key[3];
+	rtdata->semctl_keys[4] = semctl->attr.keys.key[4];
+	rtdata->semctl_keys[5] = semctl->attr.keys.key[5];
+
+	__ntapi->tt_guid_copy(
+		&rtdata->semctl_guid,
+		&semctl->attr.guid);
+
+	return NT_STATUS_SUCCESS;
+}
+
+static int32_t __sempid_symlink_set(
+	nt_rtdata *		rtdata,
+	nt_tty_service_info *	semctl)
+{
+	int32_t			status;
+	void *			hpiddir;
+	nt_port_name		svcname;
+	nt_unicode_string	str;
+
+	if (rtdata->hsempid)
+		return NT_STATUS_SUCCESS;
+
+	if (!rtdata->hsempiddir) {
+		if ((status = __ntapi->tt_open_ipc_object_directory(
+				&hpiddir,
+				NT_DIRECTORY_ALL_ACCESS,
+				p_sempid,&g_sempid)))
+			return status;
+
+		if (at_locked_cas((intptr_t *)&rtdata->hsempiddir,0,(intptr_t)hpiddir))
+			__ntapi->zw_close(hpiddir);
+	}
+
+	__ntapi->tt_port_name_from_attr(
+		&svcname,&semctl->attr);
+
+	str.strlen = (uint16_t)(size_t)(&(((nt_port_name *)0)->null_termination));
+	str.maxlen = sizeof(nt_port_name);
+	str.buffer = svcname.base_named_objects;
+
+	return __ntapi->tt_create_ipc_object_directory_entry(
+		&rtdata->hsempid,
+		NT_SEC_STANDARD_RIGHTS_ALL,
+		rtdata->hsempiddir,
+		0,&str,
+		pe_get_current_process_id());
+
+}
+
+static int32_t	__stdcall __sem_open(
+	void *			hipc,
+	nt_sem_info *		sem,
+	uint32_t		access,
+	nt_object_attributes *	oa,
+	nt_iosb *		iosb,
+	uint32_t		share,
+	uint32_t		semslots,
+	uint32_t		key,
+	uint32_t		id,
+	uint32_t		opcode)
+{
+	int32_t			status;
+	nt_tty_port_msg		msg;
+	nt_iosb			siosb;
+	nt_tty_service_info	semctl;
+	nt_runtime_data *	rtdata;
+
+	/* init */
+	rtdata = (__ntapi_internals())->rtdata;
+
+	/* semctl service attributes */
+	if (!rtdata->hsempid)
+		if ((status = __semctl_get_service_attr(rtdata,&semctl)))
+			return status;
+
+	/* semctl server */
+	if ((status = __semctl_server_connect(rtdata,&semctl)))
+		return status;
+
+	/* sempid symlink */
+	if ((status = __sempid_symlink_set(rtdata,&semctl)))
+		return status;
+
+	/* hipc */
+	if (!hipc && (opcode == NT_TTY_SEM_ALLOC))
+		hipc = (__ntapi_internals())->rtdata->hsemctl;
+
+	/* obtain sem info */
+	__ntapi->tt_aligned_block_memset(
+		&msg,0,sizeof(msg));
+
+	if (!iosb)
+		iosb = &siosb;
+
+	msg.header.msg_type		= NT_LPC_NEW_MESSAGE;
+	msg.header.data_size		= sizeof(nt_sem_info_msg) - sizeof(msg.header);
+	msg.header.msg_size		= sizeof(msg);
+	msg.ttyinfo.opcode		= opcode;
+
+	msg.seminfo.semkey		= (int32_t)key;
+	msg.seminfo.semid		= (int32_t)id;
+	msg.seminfo.semslots		= semslots;
+
+	msg.seminfo.ntattr		= oa->obj_attr;
+	msg.seminfo.ntaccess		= access;
+	msg.seminfo.ntshare		= share;
+
+	if ((status = __ntapi->zw_request_wait_reply_port(hipc,&msg,&msg)))
+		return status;
+	else if (msg.ttyinfo.status)
+		return msg.ttyinfo.status;
+
+	iosb->info   = sizeof(msg.svcinfo);
+	iosb->status = NT_STATUS_SUCCESS;
+
+	/* new semaphore? */
+	if (opcode == NT_TTY_SEM_ALLOC)
+		if ((status = __ntapi->ipc_connect_by_attr(
+				&hipc,&msg.svcinfo.attr)))
+			return status;
+
+	/* all done */
+	__ntapi->tt_aligned_block_memset(
+		(uintptr_t *)sem,
+		0,sizeof(*sem));
+
+	sem->semkey = msg.svcinfo.key;
+	sem->semid  = msg.svcinfo.id;
+
+	sem->hport = hipc;
+
+	return NT_STATUS_SUCCESS;
+}
+
+
+int32_t	__ntapi_sem_create(
+	__in	void *			hport,
+	__out	nt_sem_info *		sem,
+	__in	uint32_t		access,
+	__in	nt_object_attributes *	oa,
+	__out	nt_iosb *		iosb,
+	__in	uint32_t		share,
+	__in	uint32_t		nslots)
+{
+	uint32_t key;
+
+	/* validate */
+	if (!oa->root_dir)
+		return NT_STATUS_DIRECTORY_SERVICE_REQUIRED;
+
+	if (oa->obj_name && !oa->obj_name->strlen) {
+		key = 0;
+
+	} else if (oa->obj_name) {
+		if (oa->obj_name->strlen != 8 * sizeof(wchar16_t))
+			return NT_STATUS_OBJECT_NAME_INVALID;
+
+		if (__ntapi->tt_hex_utf16_to_uint32(oa->obj_name->buffer,&key))
+			return NT_STATUS_OBJECT_NAME_INVALID;
+
+	} else {
+		key = 0;
+	}
+
+	/* open semaphore */
+	return __sem_open(
+		hport,sem,access,
+		oa,iosb,share,nslots,
+		key,0,NT_TTY_SEM_ALLOC);
+}
+
+
+int32_t	__stdcall __ntapi_sem_open(
+	__in	void *			hport,
+	__out	nt_sem_info *		sem,
+	__in	uint32_t		access,
+	__in	nt_object_attributes *	oa,
+	__out	nt_iosb *		iosb,
+	__in	uint32_t		share,
+	__in	uint32_t		nslots)
+{
+	int32_t		status;
+	uint32_t	key;
+	uint32_t	id;
+	void *		hsymlink;
+	nt_oa		ipcoa;
+	void *		hipc;
+
+	/* validate */
+	if (!oa->root_dir)
+		return NT_STATUS_DIRECTORY_SERVICE_REQUIRED;
+
+	if (!oa->obj_name)
+		return NT_STATUS_INVALID_PARAMETER;
+
+	if (oa->obj_name->strlen != 8 * sizeof(wchar16_t))
+		return NT_STATUS_OBJECT_NAME_INVALID;
+
+	if (__ntapi->tt_hex_utf16_to_uint32(oa->obj_name->buffer,&key))
+		return NT_STATUS_OBJECT_NAME_INVALID;
+
+	/* open symlink */
+	ipcoa.len      = sizeof(ipcoa);
+	ipcoa.root_dir = oa->root_dir;
+	ipcoa.obj_name = oa->obj_name;
+	ipcoa.obj_attr = 0;
+	ipcoa.sec_desc = oa->sec_desc;
+	ipcoa.sec_qos  = oa->sec_qos;
+
+	status = __ntapi->zw_open_symbolic_link_object(
+		&hsymlink,
+		NT_SEC_STANDARD_RIGHTS_READ | NT_GENERIC_READ,
+		&ipcoa);
+
+	switch (status) {
+		case NT_STATUS_SUCCESS:
+			break;
+
+		case NT_STATUS_OBJECT_NAME_NOT_FOUND:
+		case NT_STATUS_OBJECT_PATH_NOT_FOUND:
+			if (oa->obj_attr & NT_OBJ_OPENIF)
+				return __sem_open(
+					hport,sem,access,
+					oa,iosb,share,nslots,
+					key,0,NT_TTY_SEM_ALLOC);
+			else
+				return status;
+
+		default:
+			return status;
+	}
+
+	/* ipc connect */
+	status = __ntapi->ipc_connect_by_symlink(
+		&hipc,hsymlink);
+
+	__ntapi->zw_close(
+		hsymlink);
+
+	if (status)
+		return status;
+
+	/* open by id? */
+	if (oa->obj_attr & NT_OBJ_OPENLINK) {
+		id  = key;
+		key = 0;
+	} else {
+		id  = 0;
+	}
+
+	return __sem_open(
+		hipc,sem,access,
+		oa,iosb,share,nslots,
+		key,id,NT_TTY_SEM_OPEN);
+}
diff --git a/src/sem/ntapi_sem_fcntl.c b/src/sem/ntapi_sem_fcntl.c
new file mode 100644
index 0000000..d48557f
--- /dev/null
+++ b/src/sem/ntapi_sem_fcntl.c
@@ -0,0 +1,41 @@
+/********************************************************/
+/*  ntapi: Native API core library                      */
+/*  Copyright (C) 2013--2017  Z. Gilboa                 */
+/*  Released under GPLv2 and GPLv3; see COPYING.NTAPI.  */
+/********************************************************/
+
+#include <psxtypes/psxtypes.h>
+#include <ntapi/nt_file.h>
+#include <ntapi/nt_string.h>
+#include <ntapi/nt_atomic.h>
+#include <ntapi/nt_port.h>
+#include <ntapi/nt_ipc.h>
+#include <ntapi/nt_sem.h>
+#include <ntapi/ntapi.h>
+#include "ntapi_impl.h"
+
+int32_t	__stdcall __ntapi_sem_fcntl(
+	__in	nt_sem_info *		sem,
+	__in	void *			hevent			__optional,
+	__in	nt_io_apc_routine *	apc_routine		__optional,
+	__in	void *			apc_context		__optional,
+	__out	nt_iosb *		iosb,
+	__in	uint32_t		fs_control_code,
+	__in	void *			input_buffer		__optional,
+	__in	uint32_t		input_buffer_length,
+	__out	void *			output_buffer		__optional,
+	__in	uint32_t		output_buffer_length)
+{
+	(void)sem;
+	(void)hevent;
+	(void)apc_routine;
+	(void)apc_context;
+	(void)iosb;
+	(void)fs_control_code;
+	(void)input_buffer;
+	(void)input_buffer_length;
+	(void)output_buffer;
+	(void)output_buffer_length;
+
+	return 0;
+}
diff --git a/src/sem/ntapi_sem_fdio.c b/src/sem/ntapi_sem_fdio.c
new file mode 100644
index 0000000..5840226
--- /dev/null
+++ b/src/sem/ntapi_sem_fdio.c
@@ -0,0 +1,65 @@
+/********************************************************/
+/*  ntapi: Native API core library                      */
+/*  Copyright (C) 2013--2017  Z. Gilboa                 */
+/*  Released under GPLv2 and GPLv3; see COPYING.NTAPI.  */
+/********************************************************/
+
+#include <psxtypes/psxtypes.h>
+#include <ntapi/nt_file.h>
+#include <ntapi/nt_string.h>
+#include <ntapi/nt_atomic.h>
+#include <ntapi/nt_port.h>
+#include <ntapi/nt_ipc.h>
+#include <ntapi/nt_sem.h>
+#include <ntapi/ntapi.h>
+#include "ntapi_impl.h"
+
+static int32_t __sem_fdio(
+	nt_sem_info *		sem,
+	nt_iosb *		iosb,
+	uint32_t		opcode)
+{
+	int32_t		status;
+	nt_sem_info_msg	msg;
+
+	/* validate */
+	if (!iosb)
+		return NT_STATUS_INVALID_PARAMETER;
+
+	/* msg */
+	__ntapi->tt_aligned_block_memset(
+		&msg,0,sizeof(msg));
+
+	msg.header.msg_type		= NT_LPC_NEW_MESSAGE;
+	msg.header.data_size		= sizeof(msg.data);
+	msg.header.msg_size		= sizeof(msg);
+	msg.data.ttyinfo.opcode		= opcode;
+
+	msg.data.seminfo.semkey		= sem->semkey;
+	msg.data.seminfo.semid		= sem->semid;
+	msg.data.seminfo.sempid		= sem->sempid;
+
+	if ((status = __ntapi->zw_request_wait_reply_port(sem->hport,&msg,&msg)))
+		return status;
+	else if (msg.data.ttyinfo.status)
+		return msg.data.ttyinfo.status;
+
+	iosb->status = NT_STATUS_SUCCESS;
+	iosb->info   = 0;
+
+	return NT_STATUS_SUCCESS;
+}
+
+int32_t	__stdcall __ntapi_sem_cancel(
+	__in	nt_sem_info *		sem,
+	__out	nt_iosb *		iosb)
+{
+	return __sem_fdio(sem,iosb,NT_TTY_SEM_CANCEL);
+}
+
+int32_t	__stdcall __ntapi_sem_free(
+	__in	nt_sem_info *		sem,
+	__out	nt_iosb *		iosb)
+{
+	return __sem_fdio(sem,iosb,NT_TTY_SEM_FREE);
+}
diff --git a/src/sem/ntapi_sem_ioctl.c b/src/sem/ntapi_sem_ioctl.c
new file mode 100644
index 0000000..2e7ac37
--- /dev/null
+++ b/src/sem/ntapi_sem_ioctl.c
@@ -0,0 +1,115 @@
+/********************************************************/
+/*  ntapi: Native API core library                      */
+/*  Copyright (C) 2013--2017  Z. Gilboa                 */
+/*  Released under GPLv2 and GPLv3; see COPYING.NTAPI.  */
+/********************************************************/
+
+#include <psxtypes/psxtypes.h>
+#include <ntapi/nt_file.h>
+#include <ntapi/nt_string.h>
+#include <ntapi/nt_atomic.h>
+#include <ntapi/nt_port.h>
+#include <ntapi/nt_ipc.h>
+#include <ntapi/nt_sem.h>
+#include <ntapi/ntapi.h>
+#include "ntapi_impl.h"
+
+static int32_t __sem_ioctl_return(
+	intptr_t *	hlock,
+	int32_t		status)
+{
+	at_store(hlock,0);
+	return status;
+}
+
+
+int32_t	__stdcall __ntapi_sem_ioctl(
+	__in	nt_sem_info *		sem,
+	__in	void *			hevent			__optional,
+	__in	nt_io_apc_routine *	apc_routine		__optional,
+	__in	void *			apc_context		__optional,
+	__out	nt_iosb *		iosb,
+	__in	uint32_t		io_control_code,
+	__in	void *			input_buffer		__optional,
+	__in	uint32_t		input_buffer_length,
+	__out	void *			output_buffer		__optional,
+	__in	uint32_t		output_buffer_length)
+{
+	int32_t			status;
+	void *			hsection;
+	void *			secaddr;
+	size_t			secsize;
+	nt_sem_info_msg		msg;
+	intptr_t *		hlock;
+
+	(void)output_buffer;
+	(void)output_buffer_length;
+
+	/* validate */
+	if (io_control_code)
+		return NT_STATUS_NOT_SUPPORTED;
+
+	else if (!iosb)
+		return NT_STATUS_INVALID_PARAMETER;
+
+	else if (!input_buffer_length)
+		return NT_STATUS_INVALID_PARAMETER;
+
+	else if (input_buffer_length % sizeof(nt_sem_op))
+		return NT_STATUS_INFO_LENGTH_MISMATCH;
+
+	/* section */
+	if (sem->section_addr) {
+		hsection = sem->section;
+		secaddr  = sem->section_addr;
+		secsize  = sem->section_size;
+
+	} else if ((status = __ntapi->ipc_init_section_by_port(
+			sem->hport,&hsection,
+			&secaddr,&secsize)))
+		return status;
+
+	if (input_buffer_length > secsize)
+		return NT_STATUS_INFO_LENGTH_MISMATCH;
+
+	/* lock */
+	hlock = &(__ntapi_internals()->hlock);
+
+	if (at_locked_cas(hlock,0,1))
+		return NT_STATUS_RESOURCE_NOT_OWNED;
+
+	/* semop array to section */
+	__ntapi->tt_generic_memcpy(
+		secaddr,input_buffer,
+		input_buffer_length);
+
+	/* msg */
+	__ntapi->tt_aligned_block_memset(
+		&msg,0,sizeof(msg));
+
+	msg.header.msg_type		= NT_LPC_NEW_MESSAGE;
+	msg.header.data_size		= sizeof(msg.data);
+	msg.header.msg_size		= sizeof(msg);
+	msg.data.ttyinfo.opcode		= NT_TTY_SEM_IOCTL;
+
+	msg.data.seminfo.semkey		= sem->semkey;
+	msg.data.seminfo.semid		= sem->semid;
+	msg.data.seminfo.sempid		= sem->sempid;
+	msg.data.seminfo.section_addr	= secaddr;
+	msg.data.seminfo.section_size	= input_buffer_length;
+
+	msg.data.seminfo.hevent[0]	= hevent;
+	msg.data.seminfo.apc_routine	= apc_routine;
+	msg.data.seminfo.apc_context	= apc_context;
+	msg.data.seminfo.riosb		= iosb;
+
+	if ((status = __ntapi->zw_request_wait_reply_port(sem->hport,&msg,&msg)))
+		return __sem_ioctl_return(hlock,status);
+	else if (msg.data.ttyinfo.status)
+		return __sem_ioctl_return(hlock,msg.data.ttyinfo.status);
+
+	iosb->status = NT_STATUS_SUCCESS;
+	iosb->info   = 0;
+
+	return __sem_ioctl_return(hlock,NT_STATUS_SUCCESS);
+}
diff --git a/src/sem/ntapi_sem_query.c b/src/sem/ntapi_sem_query.c
new file mode 100644
index 0000000..816d50d
--- /dev/null
+++ b/src/sem/ntapi_sem_query.c
@@ -0,0 +1,130 @@
+/********************************************************/
+/*  ntapi: Native API core library                      */
+/*  Copyright (C) 2013--2017  Z. Gilboa                 */
+/*  Released under GPLv2 and GPLv3; see COPYING.NTAPI.  */
+/********************************************************/
+
+#include <psxtypes/psxtypes.h>
+#include <ntapi/nt_file.h>
+#include <ntapi/nt_string.h>
+#include <ntapi/nt_atomic.h>
+#include <ntapi/nt_port.h>
+#include <ntapi/nt_ipc.h>
+#include <ntapi/nt_sem.h>
+#include <ntapi/ntapi.h>
+#include "ntapi_impl.h"
+
+static int32_t __sem_query_return(
+	intptr_t *	hlock,
+	int32_t		status,
+	int32_t		cmd)
+{
+	if (cmd == NT_SEM_CMD_GETALL)
+		at_store(hlock,0);
+
+	return status;
+}
+
+int32_t	__stdcall __ntapi_sem_query(
+	__in	nt_sem_info *		sem,
+	__out	nt_io_status_block *	iosb,
+	__out	void *			sem_info,
+	__in	uint32_t		sem_info_length,
+	__in	int32_t			sem_ipc_cmd)
+{
+	int32_t			status;
+	void *			hsection;
+	void *			secaddr;
+	size_t			secsize;
+	nt_sem_info_msg		msg;
+	intptr_t *		hlock;
+
+	/* validate */
+	if (!iosb)
+		return NT_STATUS_INVALID_PARAMETER;
+
+	else if (!sem_info)
+		return NT_STATUS_INVALID_PARAMETER;
+
+	else if (!sem_info_length)
+		return NT_STATUS_INVALID_PARAMETER;
+
+	else if (sem_ipc_cmd != NT_SEM_CMD_GETALL)
+		if (sem_info_length != sizeof(nt_sem_info))
+			return NT_STATUS_INFO_LENGTH_MISMATCH;
+
+	/* section */
+	hsection = 0;
+	secaddr  = 0;
+	secsize  = 0;
+
+	if (sem_ipc_cmd == NT_SEM_CMD_GETALL) {
+		if (sem->section_addr) {
+			hsection = sem->section;
+			secaddr  = sem->section_addr;
+			secsize  = sem->section_size;
+
+		} else if ((status = __ntapi->ipc_init_section_by_port(
+				sem->hport,&hsection,
+				&secaddr,&secsize)))
+			return status;
+
+		/* lock */
+		hlock = &(__ntapi_internals()->hlock);
+
+		if (at_locked_cas(hlock,0,1))
+			return NT_STATUS_RESOURCE_NOT_OWNED;
+	}
+
+	/* msg */
+	__ntapi->tt_aligned_block_memset(
+		&msg,0,sizeof(msg));
+
+	msg.header.msg_type		= NT_LPC_NEW_MESSAGE;
+	msg.header.data_size		= sizeof(msg.data);
+	msg.header.msg_size		= sizeof(msg);
+	msg.data.ttyinfo.opcode		= NT_TTY_SEM_QUERY;
+
+	msg.data.seminfo.semcmd		= sem_ipc_cmd;
+	msg.data.seminfo.semkey		= sem->semkey;
+	msg.data.seminfo.semid		= sem->semid;
+	msg.data.seminfo.semnum		= sem->semnum;
+	msg.data.seminfo.section_addr	= secaddr;
+	msg.data.seminfo.section_size	= secsize;
+
+	if ((status = __ntapi->zw_request_wait_reply_port(sem->hport,&msg,&msg)))
+		return __sem_query_return(hlock,status,sem_ipc_cmd);
+	else if (msg.data.ttyinfo.status)
+		return __sem_query_return(hlock,msg.data.ttyinfo.status,sem_ipc_cmd);
+
+	/* reply */
+	if (sem_ipc_cmd == NT_SEM_CMD_GETALL) {
+		if (msg.data.seminfo.section_size > sem_info_length)
+			return __sem_query_return(
+				hlock,
+				NT_STATUS_BUFFER_TOO_SMALL,
+				sem_ipc_cmd);
+
+		__ntapi->tt_generic_memcpy(
+			sem_info,secaddr,
+			msg.data.seminfo.section_size);
+
+		at_store(hlock,0);
+
+		iosb->status = NT_STATUS_SUCCESS;
+		iosb->info   = msg.data.seminfo.section_size;
+	} else {
+		if (msg.header.data_size != sizeof(msg.data))
+			return NT_STATUS_UNEXPECTED_IO_ERROR;
+
+		__ntapi->tt_generic_memcpy(
+			sem_info,
+			&msg.data.seminfo,
+			sizeof(msg.data.seminfo));
+
+		iosb->status = NT_STATUS_SUCCESS;
+		iosb->info   = sizeof(msg.data.seminfo);
+	}
+
+	return NT_STATUS_SUCCESS;
+}
diff --git a/src/sem/ntapi_sem_set.c b/src/sem/ntapi_sem_set.c
new file mode 100644
index 0000000..813de30
--- /dev/null
+++ b/src/sem/ntapi_sem_set.c
@@ -0,0 +1,117 @@
+/********************************************************/
+/*  ntapi: Native API core library                      */
+/*  Copyright (C) 2013--2017  Z. Gilboa                 */
+/*  Released under GPLv2 and GPLv3; see COPYING.NTAPI.  */
+/********************************************************/
+
+#include <psxtypes/psxtypes.h>
+#include <ntapi/nt_file.h>
+#include <ntapi/nt_string.h>
+#include <ntapi/nt_atomic.h>
+#include <ntapi/nt_port.h>
+#include <ntapi/nt_ipc.h>
+#include <ntapi/nt_sem.h>
+#include <ntapi/ntapi.h>
+#include "ntapi_impl.h"
+
+static int32_t __sem_set_return(
+	intptr_t *	hlock,
+	int32_t		status,
+	int32_t		cmd)
+{
+	if (cmd == NT_SEM_CMD_SETALL)
+		at_store(hlock,0);
+
+	return status;
+}
+
+int32_t	__stdcall __ntapi_sem_set(
+	__in	nt_sem_info *		sem,
+	__out	nt_io_status_block *	iosb,
+	__in	void *			sem_info,
+	__in	uint32_t		sem_info_length,
+	__in	int32_t			sem_ipc_cmd)
+{
+	int32_t			status;
+	void *			hsection;
+	void *			secaddr;
+	size_t			secsize;
+	nt_sem_info_msg		msg;
+	intptr_t *		hlock;
+
+	/* validate */
+	if (!iosb)
+		return NT_STATUS_INVALID_PARAMETER;
+
+	else if (!sem_info)
+		return NT_STATUS_INVALID_PARAMETER;
+
+	else if (!sem_info_length)
+		return NT_STATUS_INVALID_PARAMETER;
+
+	else if (sem_ipc_cmd != NT_SEM_CMD_SETALL)
+		if (sem_info_length != sizeof(nt_sem_info))
+			return NT_STATUS_INFO_LENGTH_MISMATCH;
+
+	/* section */
+	hsection = 0;
+	secaddr  = 0;
+	secsize  = 0;
+
+	/* SETALL */
+	if (sem_ipc_cmd == NT_SEM_CMD_SETALL) {
+		if (sem->section_addr) {
+			hsection = sem->section;
+			secaddr  = sem->section_addr;
+			secsize  = sem->section_size;
+
+		} else if ((status = __ntapi->ipc_init_section_by_port(
+				sem->hport,&hsection,
+				&secaddr,&secsize)))
+			return status;
+
+		/* data size */
+		if (secsize < sem_info_length)
+			return NT_STATUS_DATA_OVERRUN;
+
+		/* lock */
+		hlock = &(__ntapi_internals()->hlock);
+
+		if (at_locked_cas(hlock,0,1))
+			return NT_STATUS_RESOURCE_NOT_OWNED;
+
+		/* data copy */
+		__ntapi->tt_generic_memcpy(
+			secaddr,sem_info,
+			sem_info_length);
+	} else
+		hlock = 0;
+
+	/* msg */
+	__ntapi->tt_aligned_block_memset(
+		&msg,0,sizeof(msg));
+
+	msg.header.msg_type		= NT_LPC_NEW_MESSAGE;
+	msg.header.data_size		= sizeof(msg.data);
+	msg.header.msg_size		= sizeof(msg);
+	msg.data.ttyinfo.opcode		= NT_TTY_SEM_SET;
+
+	msg.data.seminfo.semcmd		= sem_ipc_cmd;
+	msg.data.seminfo.semkey		= sem->semkey;
+	msg.data.seminfo.semid		= sem->semid;
+	msg.data.seminfo.semnum		= sem->semnum;
+	msg.data.seminfo.semval		= sem->semval;
+	msg.data.seminfo.section_addr	= secaddr;
+	msg.data.seminfo.section_size	= sem_info_length;
+
+	if ((status = __ntapi->zw_request_wait_reply_port(sem->hport,&msg,&msg)))
+		return __sem_set_return(hlock,status,sem_ipc_cmd);
+	else if (msg.data.ttyinfo.status)
+		return __sem_set_return(hlock,msg.data.ttyinfo.status,sem_ipc_cmd);
+
+	/* reply */
+	iosb->status = NT_STATUS_SUCCESS;
+	iosb->info   = 0;
+
+	return __sem_set_return(hlock,NT_STATUS_SUCCESS,sem_ipc_cmd);
+}