Blame src/ptycon.c

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/*********************************************************/
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/*  ptycon: a pty-console bridge                         */
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/*  Copyright (C) 2016--2017  Z. Gilboa                  */
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/*  Released under GPLv2 and GPLv3; see COPYING.PTYCON.  */
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/*********************************************************/
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#include <pemagine/pemagine.h>
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#include <ntapi/ntapi.h>
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#include <ptycon/ptycon.h>
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#include "ptycon_init_impl.h"
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#include "ptycon_driver_impl.h"
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static const nt_guid ptycon_daemon_guid = PTYC_PORT_GUID_DAEMON;
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static void ptycon_exit(int code)
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{
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	/* posix exit code? */
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	if (code <= 0xff)
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		code <<= 8;
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	ntapi->zw_terminate_process(
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		NT_CURRENT_PROCESS_HANDLE,
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		code);
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}
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static int ptycon_dbg_helper(int32_t status)
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{
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	return status ? -1 : 0;
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}
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static int ptycon_dbg_init(char ** argv)
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{
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	if (argv[1] && !(ntapi->tt_strcmp_multibyte(argv[1],"--wait")))
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		return ptycon_dbg_helper(
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			ntapi->tt_wait_for_dummy_event());
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	return 0;
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}
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static int32_t ptycon_start(char ** argv, char ** envp)
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{
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	int32_t				status;
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	nt_runtime_data *		rtdata;
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	nt_port_attr			port_attr;
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        nt_pty_client_info		client_info;
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	nt_iosb				iosb;
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	/* rtdata */
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	if ((status = ntapi->tt_get_runtime_data(&rtdata,0)))
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		return status;
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	if (rtdata->argv) {
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		argv = rtdata->argv;
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		envp = rtdata->envp;
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	}
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	/* early debug (optional) */
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	ptycon_dbg_init(argv);
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	/* daemon */
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	if (!(ntapi->tt_guid_compare(
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			&rtdata->srv_guid,
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			&(nt_guid)NT_PORT_GUID_DEFAULT)))
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		ntapi->tt_guid_copy(
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			&rtdata->srv_guid,
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			&ptycon_daemon_guid);
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	/* no tty session? */
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	if (!rtdata->tty_keys[0])
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		return ptyc_main(argv,envp);
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	/* tty */
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	ntapi->tt_aligned_block_memset(
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		&port_attr,0,sizeof(port_attr));
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	port_attr.type		= NT_PORT_TYPE_SUBSYSTEM;
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	port_attr.subtype	= NT_PORT_SUBTYPE_DEFAULT;
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	port_attr.keys.key[0]	= rtdata->tty_keys[0];
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	port_attr.keys.key[1]	= rtdata->tty_keys[1];
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	port_attr.keys.key[2]	= rtdata->tty_keys[2];
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	port_attr.keys.key[3]	= rtdata->tty_keys[3];
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	port_attr.keys.key[4]	= rtdata->tty_keys[4];
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	port_attr.keys.key[5]	= rtdata->tty_keys[5];
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	ntapi->tt_guid_copy(
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		&port_attr.guid,
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		&rtdata->tty_guid);
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	if ((status = ntapi->tty_join_session(
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			&rtdata->hsession,0,
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			&port_attr,
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			NT_TTY_SESSION_PRIMARY)))
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		return status;
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	/* pty */
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	if ((status = ntapi->pty_inherit_runtime_ctty(
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			rtdata->hsession,
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			rtdata)))
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		return status;
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	/* ctty identification */
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	if (rtdata->hctty) {
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		client_info.any[0] = 0;
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		client_info.any[1] = 0;
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		client_info.any[2] = 0;
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		client_info.any[3] = 0;
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		if ((status = ntapi->pty_set(
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				rtdata->hctty,&iosb,
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				&client_info,sizeof(client_info),
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				NT_PTY_CLIENT_INFORMATION)))
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			return status;
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	}
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	/* ready */
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	if (rtdata->hready)
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		if ((status = ntapi->zw_set_event(rtdata->hready,0)))
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			return status;
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	/* main */
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	return ptyc_main(argv,envp);
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}
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static int __stdcall ptycon_daemon_entry_point(void * hswap)
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{
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	int32_t		status;
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	int		argc;
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	char **		argv;
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	char **		envp;
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	ntapi->zw_set_event(hswap,0);
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	ntapi->zw_close(hswap);
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	if ((status = ntapi->tt_get_argv_envp_utf8(
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			&argc,&argv,&envp,
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			0,0,0)))
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		ptycon_exit(status);
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	ptycon_exit(ptycon_start(argv,envp));
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	return NT_STATUS_INTERNAL_ERROR;
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}
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int ptycon_entry_point(void)
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{
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	int32_t			status;
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	nt_thread_params	params;
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	void *			hswap;
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	if ((status = ptyc_init()))
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		return status;
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	if ((status = ntapi->tt_create_private_event(
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			&hswap,
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			NT_NOTIFICATION_EVENT,
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			NT_EVENT_NOT_SIGNALED)))
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		return status;
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	ntapi->tt_aligned_block_memset(
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		&params,0,sizeof(params));
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	params.hprocess		  = NT_CURRENT_PROCESS_HANDLE;
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	params.start		  = ptycon_daemon_entry_point;
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	params.arg                = hswap;
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	params.stack_size_commit  = 128 * 1024;
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	params.stack_size_reserve = 128 * 1024;
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	params.creation_flags	  = NT_CREATE_LOCAL_THREAD;
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	if ((status = ntapi->tt_create_thread(&params)))
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		ptycon_exit(status);
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	ntapi->zw_wait_for_single_object(
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		hswap,NT_SYNC_NON_ALERTABLE,0);
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	ntapi->zw_close(
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		params.hthread);
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	ntapi->zw_terminate_thread(
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		NT_CURRENT_THREAD_HANDLE,
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		NT_STATUS_SUCCESS);
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	return NT_STATUS_INTERNAL_ERROR;
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}