xtrn.cpp 63.8 KB
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/* xtrn.cpp */

/* Synchronet external program support routines */

/* $Id$ */

/****************************************************************************
 * @format.tab-size 4		(Plain Text/Source Code File Header)			*
 * @format.use-tabs true	(see http://www.synchro.net/ptsc_hdr.html)		*
 *																			*
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 * Copyright 2005 Rob Swindell - http://www.synchro.net/copyright.html		*
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 *																			*
 * This program is free software; you can redistribute it and/or			*
 * modify it under the terms of the GNU General Public License				*
 * as published by the Free Software Foundation; either version 2			*
 * of the License, or (at your option) any later version.					*
 * See the GNU General Public License for more details: gpl.txt or			*
 * http://www.fsf.org/copyleft/gpl.html										*
 *																			*
 * Anonymous FTP access to the most recent released source is available at	*
 * ftp://vert.synchro.net, ftp://cvs.synchro.net and ftp://ftp.synchro.net	*
 *																			*
 * Anonymous CVS access to the development source and modification history	*
 * is available at cvs.synchro.net:/cvsroot/sbbs, example:					*
 * cvs -d :pserver:anonymous@cvs.synchro.net:/cvsroot/sbbs login			*
 *     (just hit return, no password is necessary)							*
 * cvs -d :pserver:anonymous@cvs.synchro.net:/cvsroot/sbbs checkout src		*
 *																			*
 * For Synchronet coding style and modification guidelines, see				*
 * http://www.synchro.net/source.html										*
 *																			*
 * You are encouraged to submit any modifications (preferably in Unix diff	*
 * format) via e-mail to mods@synchro.net									*
 *																			*
 * Note: If this box doesn't appear square, then you need to fix your tabs.	*
 ****************************************************************************/

#include "sbbs.h"
#include "cmdshell.h"
#include "telnet.h"

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#include <signal.h>			// kill()

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#ifdef __unix__
	#include <sys/wait.h>	// WEXITSTATUS

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	#define TTYDEFCHARS		// needed for ttydefchars definition

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#if defined(__FreeBSD__)
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	#include <libutil.h>	// forkpty()
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#elif defined(__OpenBSD__) || defined(__NetBSD__) || defined(__DARWIN__)
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	#include <util.h>
#elif defined(__linux__)
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	#include <pty.h>
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#elif defined(__QNX__)
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#if 0
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	#include <unix.h>
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#else
	#define NEEDS_FORKPTY
#endif
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#endif
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	#ifdef NEEDS_FORKPTY
	#include <grp.h>
	#endif

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	#include <termios.h>
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/*
 * Control Character Defaults
 */
#ifndef CTRL
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	#define CTRL(x)	(x&037)
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#endif
#ifndef CEOF
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	#define	CEOF		CTRL('d')
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#endif
#ifndef CEOL
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	#define	CEOL		0xff		/* XXX avoid _POSIX_VDISABLE */
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#endif
#ifndef CERASE
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	#define	CERASE		0177
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#endif
#ifndef CERASE2
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	#define	CERASE2		CTRL('h')
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#endif
#ifndef CINTR
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	#define	CINTR		CTRL('c')
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#endif
#ifndef CSTATUS
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	#define	CSTATUS		CTRL('t')
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#endif
#ifndef CKILL
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	#define	CKILL		CTRL('u')
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#endif
#ifndef CMIN
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	#define	CMIN		1
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#endif
#ifndef CQUIT
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	#define	CQUIT		034		/* FS, ^\ */
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#endif
#ifndef CSUSP
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	#define	CSUSP		CTRL('z')
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#endif
#ifndef CTIME
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	#define	CTIME		0
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#endif
#ifndef CDSUSP
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	#define	CDSUSP		CTRL('y')
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#endif
#ifndef CSTART
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	#define	CSTART		CTRL('q')
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#endif
#ifndef CSTOP
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	#define	CSTOP		CTRL('s')
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#endif
#ifndef CLNEXT
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	#define	CLNEXT		CTRL('v')
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#endif
#ifndef CDISCARD
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	#define	CDISCARD 	CTRL('o')
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#endif
#ifndef CWERASE
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	#define	CWERASE 	CTRL('w')
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#endif
#ifndef CREPRINT
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	#define	CREPRINT 	CTRL('r')
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#endif
#ifndef CEOT
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	#define	CEOT		CEOF
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#endif
/* compat */
#ifndef CBRK
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	#define	CBRK		CEOL
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#endif
#ifndef CRPRNT
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	#define CRPRNT		CREPRINT
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#endif
#ifndef CFLUSH
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	#define	CFLUSH		CDISCARD
#endif

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#ifndef TTYDEF_IFLAG
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	#define TTYDEF_IFLAG    (BRKINT | ICRNL | IMAXBEL | IXON | IXANY)
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#endif
#ifndef TTYDEF_OFLAG
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	#define TTYDEF_OFLAG    (OPOST | ONLCR)
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#endif
#ifndef TTYDEF_LFLAG
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	#define TTYDEF_LFLAG    (ECHO | ICANON | ISIG | IEXTEN | ECHOE|ECHOKE|ECHOCTL)
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#endif
#ifndef TTYDEF_CFLAG
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	#define TTYDEF_CFLAG    (CREAD | CS8 | HUPCL)
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#endif
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#if defined(__QNX__) || defined(__solaris__) || defined(__NetBSD__)
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	static cc_t     ttydefchars[NCCS] = {
        CEOF,   CEOL,   CEOL,   CERASE, CWERASE, CKILL, CREPRINT,
        CERASE2, CINTR, CQUIT,  CSUSP,  CDSUSP, CSTART, CSTOP,  CLNEXT,
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        CDISCARD, CMIN, CTIME,  CSTATUS
#ifndef __solaris__
	, _POSIX_VDISABLE
#endif
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	};
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#endif

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#endif	/* __unix__ */

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#define XTRN_IO_BUF_LEN 10000	/* 50% of IO_THREAD_BUF_SIZE */
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/*****************************************************************************/
/* Interrupt routine to expand WWIV Ctrl-C# codes into ANSI escape sequences */
/*****************************************************************************/
BYTE* wwiv_expand(BYTE* buf, ulong buflen, BYTE* outbuf, ulong& newlen
	,ulong user_misc, bool& ctrl_c)
{
    char	ansi_seq[32];
	ulong 	i,j,k;

    for(i=j=0;i<buflen;i++) {
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        if(buf[i]==CTRL_C) {	/* WWIV color escape char */
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            ctrl_c=true;
            continue;
        }
        if(!ctrl_c) {
            outbuf[j++]=buf[i];
            continue;
        }
        ctrl_c=false;
        if(user_misc&ANSI) {
            switch(buf[i]) {
                default:
                    strcpy(ansi_seq,"\x1b[0m");          /* low grey */
                    break;
                case '1':
                    strcpy(ansi_seq,"\x1b[0;1;36m");     /* high cyan */
                    break;
                case '2':
                    strcpy(ansi_seq,"\x1b[0;1;33m");     /* high yellow */
                    break;
                case '3':
                    strcpy(ansi_seq,"\x1b[0;35m");       /* low magenta */
                    break;
                case '4':
                    strcpy(ansi_seq,"\x1b[0;1;44m");     /* white on blue */
                    break;
                case '5':
                    strcpy(ansi_seq,"\x1b[0;32m");       /* low green */
                    break;
                case '6':
                    strcpy(ansi_seq,"\x1b[0;1;5;31m");   /* high blinking red */
                    break;
                case '7':
                    strcpy(ansi_seq,"\x1b[0;1;34m");     /* high blue */
                    break;
                case '8':
                    strcpy(ansi_seq,"\x1b[0;34m");       /* low blue */
                    break;
                case '9':
                    strcpy(ansi_seq,"\x1b[0;36m");       /* low cyan */
                    break;
            }
            for(k=0;ansi_seq[k];k++)
                outbuf[j++]=ansi_seq[k];
        }
    }
    newlen=j;
    return(outbuf);
}
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/*****************************************************************************/
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// Escapes Telnet IAC (255) by doubling the IAC char
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/*****************************************************************************/
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BYTE* telnet_expand(BYTE* inbuf, ulong inlen, BYTE* outbuf, ulong& newlen)
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{
	BYTE*   first_iac;
	ulong	i,outlen;

    first_iac=(BYTE*)memchr(inbuf, TELNET_IAC, inlen);

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	if(first_iac==NULL) {	/* Nothing to expand */
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		newlen=inlen;
		return(inbuf);
	}

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	outlen=first_iac-inbuf;
	memcpy(outbuf, inbuf, outlen);
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    for(i=outlen;i<inlen;i++) {
		if(inbuf[i]==TELNET_IAC)
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			outbuf[outlen++]=TELNET_IAC;
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		outbuf[outlen++]=inbuf[i];
	}
    newlen=outlen;
    return(outbuf);
}
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#define XTRN_LOADABLE_MODULE								\
	if(cmdline[0]=='*') {   /* Baja module or JavaScript */	\
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		SAFECOPY(str,cmdline+1);							\
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		p=strchr(str,' ');									\
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		if(p) {												\
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			strcpy(main_csi.str,p+1);						\
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			*p=0; 											\
		} else												\
			main_csi.str[0]=0;								\
		if(!strchr(str,'.'))								\
			strcat(str,".bin");								\
		return(exec_bin(str,&main_csi));					\
	}														
#ifdef JAVASCRIPT
	#define XTRN_LOADABLE_JS_MODULE							\
	if(cmdline[0]=='?') 	/* JavaScript */				\
		return(js_execfile(cmdline+1))						
#else
	#define XTRN_LOADABLE_JS_MODULE
#endif
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#ifdef _WIN32

#include "execvxd.h"	/* Win9X FOSSIL VxD API */

extern SOCKET node_socket[];

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// -------------------------------------------------------------------------
// GetAddressOfOpenVxDHandle
//
// This function returns the address of OpenVxDHandle. OpenVxDHandle is a 
// KERNEL32 function that returns a ring 0 event handle that corresponds to a
// given ring 3 event handle. The ring 0 handle can be used by VxDs to
// synchronize with the Win32 app.
//
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typedef HANDLE (WINAPI *OPENVXDHANDLE)(HANDLE);

OPENVXDHANDLE GetAddressOfOpenVxDHandle(void)
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{
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	return((OPENVXDHANDLE)GetProcAddress(hK32, "OpenVxDHandle"));
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}

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/*****************************************************************************/
// Expands Single CR to CRLF
/*****************************************************************************/
BYTE* cr_expand(BYTE* inbuf, ulong inlen, BYTE* outbuf, ulong& newlen)
{
	ulong	i,j;

	for(i=j=0;i<inlen;i++) {
		outbuf[j++]=inbuf[i];
		if(inbuf[i]=='\r')
			outbuf[j++]='\n';
	}
	newlen=j;
    return(outbuf);
}

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/* Clean-up resources while preserving current LastError value */
#define XTRN_CLEANUP												\
	last_error=GetLastError();										\
    if(vxd!=INVALID_HANDLE_VALUE)		CloseHandle(vxd);			\
	if(rdslot!=INVALID_HANDLE_VALUE)	CloseHandle(rdslot);		\
	if(wrslot!=INVALID_HANDLE_VALUE)	CloseHandle(wrslot);		\
	if(start_event!=NULL)				CloseHandle(start_event);	\
	if(hungup_event!=NULL)				CloseHandle(hungup_event);	\
	ReleaseMutex(exec_mutex);										\
	SetLastError(last_error)

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/****************************************************************************/
/* Runs an external program 												*/
/****************************************************************************/
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int sbbs_t::external(const char* cmdline, long mode, const char* startup_dir)
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{
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	char	str[MAX_PATH+1];
	char*	p;
	char*	env_block=NULL;
	char*	env_strings;
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	const char* p_startup_dir;
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	char	path[MAX_PATH+1];
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	char	fname[MAX_PATH+1];
    char	fullcmdline[MAX_PATH+1];
	char	realcmdline[MAX_PATH+1];
	char	comspec_str[MAX_PATH+1];
	char	title[MAX_PATH+1];
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	BYTE	buf[XTRN_IO_BUF_LEN],*bp;
    BYTE 	telnet_buf[XTRN_IO_BUF_LEN*2];
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    BYTE 	output_buf[XTRN_IO_BUF_LEN*2];
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    BYTE 	wwiv_buf[XTRN_IO_BUF_LEN*2];
    bool	wwiv_flag=false;
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    bool	native=false;			// DOS program by default
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	bool	nt=false;				// WinNT/2K? 
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    bool	was_online=true;
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	bool	rio_abortable_save=rio_abortable;
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	bool	use_pipes=false;	// NT-compatible console redirection
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	BOOL	success;
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	BOOL	processTerminated=false;
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	uint	i;
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    time_t	hungup=0;
	HANDLE	vxd=INVALID_HANDLE_VALUE;
	HANDLE	rdslot=INVALID_HANDLE_VALUE;
	HANDLE	wrslot=INVALID_HANDLE_VALUE;
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	HANDLE  start_event=NULL;
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	HANDLE	hungup_event=NULL;
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	HANDLE	rdoutpipe;
	HANDLE	wrinpipe;
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    PROCESS_INFORMATION process_info;
	DWORD	hVM;
	DWORD	rd;
    DWORD	wr;
    DWORD	len;
    DWORD	avail;
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	DWORD	dummy;
	DWORD	msglen;
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	DWORD	retval;
	DWORD	last_error;
	DWORD	loop_since_io=0;
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	struct	tm tm;
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	str_list_t	env_list;
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	sbbsexec_start_t start;
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	OPENVXDHANDLE OpenVxDHandle;
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	if(online==ON_LOCAL)
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		eprintf(LOG_INFO,"Executing external: %s",cmdline);
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	XTRN_LOADABLE_MODULE;
	XTRN_LOADABLE_JS_MODULE;
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	attr(cfg.color[clr_external]);		/* setup default attributes */
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    SAFECOPY(str,cmdline);				/* Set str to program name only */
	truncstr(str," ");
    SAFECOPY(fname,getfname(str));
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    for(i=0;i<cfg.total_natvpgms;i++)
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        if(!stricmp(fname,cfg.natvpgm[i]->name))
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            break;
    if(i<cfg.total_natvpgms || mode&EX_NATIVE)
        native=true;

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	if(mode&EX_SH || strcspn(cmdline,"<>|")!=strlen(cmdline)) 
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		sprintf(comspec_str,"%s /C ", comspec);
	else
		comspec_str[0]=0;

    if(startup_dir && cmdline[1]!=':' && cmdline[0]!='/'
    	&& cmdline[0]!='\\' && cmdline[0]!='.')
       	sprintf(fullcmdline, "%s%s%s", comspec_str, startup_dir, cmdline);
    else
    	sprintf(fullcmdline, "%s%s", comspec_str, cmdline);

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	SAFECOPY(realcmdline, fullcmdline);	// for errormsg if failed to execute
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	now=time(NULL);
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	if(localtime_r(&now,&tm)==NULL)
		memset(&tm,0,sizeof(tm));
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	OpenVxDHandle=GetAddressOfOpenVxDHandle();

	if(OpenVxDHandle==NULL) 
		nt=true;	// Windows NT/2000

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	if(!nt && !native && !(cfg.xtrn_misc&XTRN_NO_MUTEX)
		&& (retval=WaitForSingleObject(exec_mutex,5000))!=WAIT_OBJECT_0) {
		errormsg(WHERE, ERR_TIMEOUT, "exec_mutex", retval);
		return(GetLastError());
	}

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	if(native && mode&EX_OUTR && !(mode&EX_OFFLINE))
		use_pipes=true;

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 	if(native) { // Native (32-bit) external
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		if((env_list=strListInit())==NULL) {
			XTRN_CLEANUP;
        	errormsg(WHERE, ERR_CREATE, "env_list", 0);
            return(errno);
		}

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		// Current environment passed to child process
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		sprintf(str,"DSZLOG=%sPROTOCOL.LOG",cfg.node_dir);		strListPush(&env_list,str);
		sprintf(str,"SBBSNODE=%s",cfg.node_dir);				strListPush(&env_list,str);
		sprintf(str,"SBBSCTRL=%s",cfg.ctrl_dir);				strListPush(&env_list,str);
		sprintf(str,"SBBSDATA=%s",cfg.data_dir);				strListPush(&env_list,str);
		sprintf(str,"SBBSEXEC=%s",cfg.exec_dir);				strListPush(&env_list,str);
		sprintf(str,"SBBSNNUM=%d",cfg.node_num);				strListPush(&env_list,str);
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		/* date/time env vars */
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		sprintf(str,"DAY=%02u",tm.tm_mday);						strListPush(&env_list,str);
		sprintf(str,"WEEKDAY=%s",wday[tm.tm_wday]);				strListPush(&env_list,str);
		sprintf(str,"MONTHNAME=%s",mon[tm.tm_mon]);				strListPush(&env_list,str);
		sprintf(str,"MONTH=%02u",tm.tm_mon+1);					strListPush(&env_list,str);
		sprintf(str,"YEAR=%u",1900+tm.tm_year);					strListPush(&env_list,str);

		env_strings=GetEnvironmentStrings();
		env_block=strListCopyBlock(env_strings);
		if(env_strings!=NULL)
			FreeEnvironmentStrings(env_strings);
		env_block=strListAppendBlock(env_block,env_list);
		strListFree(&env_list);
		if(env_block==NULL) {
			XTRN_CLEANUP;
        	errormsg(WHERE, ERR_CREATE, "env_block", 0);
            return(errno);
		}
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    } else { // DOS external

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		sprintf(path,"%sDOSXTRN.RET", cfg.node_dir);
		remove(path);
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    	// Create temporary environment file
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    	sprintf(path,"%sDOSXTRN.ENV", cfg.node_dir);
        FILE* fp=fopen(path,"w");
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        if(fp==NULL) {
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			XTRN_CLEANUP;
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        	errormsg(WHERE, ERR_CREATE, path, 0);
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            return(errno);
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        }
        fprintf(fp, "%s\n", fullcmdline);
		fprintf(fp, "DSZLOG=%sPROTOCOL.LOG\n", cfg.node_dir);
        fprintf(fp, "SBBSNODE=%s\n", cfg.node_dir);
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        fprintf(fp, "SBBSCTRL=%s\n", cfg.ctrl_dir);
		fprintf(fp, "SBBSDATA=%s\n", cfg.data_dir);
		fprintf(fp, "SBBSEXEC=%s\n", cfg.exec_dir);
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        fprintf(fp, "SBBSNNUM=%d\n", cfg.node_num);
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		/* date/time env vars */
		fprintf(fp, "DAY=%02u\n", tm.tm_mday);
		fprintf(fp, "WEEKDAY=%s\n",wday[tm.tm_wday]);
		fprintf(fp, "MONTHNAME=%s\n",mon[tm.tm_mon]);
		fprintf(fp, "MONTH=%02u\n",tm.tm_mon+1);
		fprintf(fp, "YEAR=%u\n",1900+tm.tm_year);
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        fclose(fp);

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		SAFECOPY(str,path);	// incase GetShortPathName fails
		GetShortPathName(path,str,sizeof(str));
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        sprintf(fullcmdline, "%sDOSXTRN.EXE %s", cfg.exec_dir, str);

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		if(!(mode&EX_OFFLINE) && nt) {	// Windows NT/2000
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			i=SBBSEXEC_MODE_FOSSIL;
			if(mode&EX_INR)
           		i|=SBBSEXEC_MODE_DOS_IN;
			if(mode&EX_OUTR)
        		i|=SBBSEXEC_MODE_DOS_OUT;
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			sprintf(str," NT %u %u %u"
				,cfg.node_num,i,startup->xtrn_polls_before_yield);
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			strcat(fullcmdline,str);

			sprintf(str,"sbbsexec_hungup%d",cfg.node_num);
			if((hungup_event=CreateEvent(
				 NULL	// pointer to security attributes
				,TRUE	// flag for manual-reset event
				,FALSE  // flag for initial state
				,str	// pointer to event-object name
				))==NULL) {
511
				XTRN_CLEANUP;
512
				errormsg(WHERE, ERR_CREATE, str, 0);
513
514
515
516
517
518
				return(GetLastError());
			}

			sprintf(str,"\\\\.\\mailslot\\sbbsexec\\rd%d"
				,cfg.node_num);
			rdslot=CreateMailslot(str
519
				,sizeof(buf)/2			// Maximum message size (0=unlimited)
520
521
522
				,0						// Read time-out
				,NULL);                 // Security
			if(rdslot==INVALID_HANDLE_VALUE) {
523
				XTRN_CLEANUP;
524
525
526
527
528
529
530
531
532
533
534
535
				errormsg(WHERE, ERR_CREATE, str, 0);
				return(GetLastError());
			}
		}
		else if(!(mode&EX_OFFLINE)) {

   			// Load vxd to intercept interrupts

			sprintf(str,"\\\\.\\%s%s",cfg.exec_dir, SBBSEXEC_VXD);
			if((vxd=CreateFile(str,0,0,0
				,CREATE_NEW, FILE_FLAG_DELETE_ON_CLOSE,0))
				 ==INVALID_HANDLE_VALUE) {
536
				XTRN_CLEANUP;
537
538
539
540
541
542
543
544
545
546
				errormsg(WHERE, ERR_OPEN, str, 0);
				return(GetLastError());
			}

			if((start_event=CreateEvent(
				 NULL	// pointer to security attributes
				,TRUE	// flag for manual-reset event
				,FALSE  // flag for initial state
				,NULL	// pointer to event-object name
				))==NULL) {
547
				XTRN_CLEANUP;
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
				errormsg(WHERE, ERR_CREATE, "exec start event", 0);
				return(GetLastError());
			}

			if(OpenVxDHandle!=NULL)
				start.event=OpenVxDHandle(start_event);
			else
				start.event=start_event;

			start.mode=SBBSEXEC_MODE_FOSSIL;
			if(mode&EX_INR)
           		start.mode|=SBBSEXEC_MODE_DOS_IN;
			if(mode&EX_OUTR)
        		start.mode|=SBBSEXEC_MODE_DOS_OUT;

563
564
			sprintf(str," 95 %u %u %u"
				,cfg.node_num,start.mode,startup->xtrn_polls_before_yield);
565
566
			strcat(fullcmdline,str);

567
568
569
570
571
572
573
574
575
576
			if(!DeviceIoControl(
				vxd,					// handle to device of interest
				SBBSEXEC_IOCTL_START,	// control code of operation to perform
				&start,					// pointer to buffer to supply input data
				sizeof(start),			// size of input buffer
				NULL,					// pointer to buffer to receive output data
				0,						// size of output buffer
				&rd,					// pointer to variable to receive output byte count
				NULL 					// Overlapped I/O
				)) {
577
				XTRN_CLEANUP;
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
				errormsg(WHERE, ERR_IOCTL, SBBSEXEC_VXD, SBBSEXEC_IOCTL_START);
				return(GetLastError());
			}
		}
    }

	if(startup_dir!=NULL && startup_dir[0])
		p_startup_dir=startup_dir;
	else
		p_startup_dir=NULL;
    STARTUPINFO startup_info={0};
    startup_info.cb=sizeof(startup_info);
	if(mode&EX_OFFLINE)
		startup_info.lpTitle=NULL;
	else {
		sprintf(title,"%s running %s on node %d"
			,useron.number ? useron.alias : "Event"
			,realcmdline
			,cfg.node_num);
		startup_info.lpTitle=title;
	}
599
    if(startup->options&BBS_OPT_XTRN_MINIMIZED) {
600
601
602
    	startup_info.wShowWindow=SW_SHOWMINNOACTIVE;
        startup_info.dwFlags|=STARTF_USESHOWWINDOW;
    }
603
604
605
606
607
608
609
610
	if(use_pipes) {
		// Set up the security attributes struct.
		SECURITY_ATTRIBUTES sa;
		memset(&sa,0,sizeof(sa));
		sa.nLength= sizeof(SECURITY_ATTRIBUTES);
		sa.lpSecurityDescriptor = NULL;
		sa.bInheritHandle = TRUE;

611
612
		// Create the child output pipe (override default 4K buffer size)
		if(!CreatePipe(&rdoutpipe,&startup_info.hStdOutput,&sa,sizeof(buf))) {
613
614
615
616
617
618
			errormsg(WHERE,ERR_CREATE,"stdout pipe",0);
			return(GetLastError());
		}
		startup_info.hStdError=startup_info.hStdOutput;

		// Create the child input pipe.
619
		if(!CreatePipe(&startup_info.hStdInput,&wrinpipe,&sa,sizeof(buf))) {
620
621
622
			errormsg(WHERE,ERR_CREATE,"stdin pipe",0);
			return(GetLastError());
		}
623

624
625
626
627
628
629
630
631
632
633
634
635
636
637
		DuplicateHandle(
			GetCurrentProcess(), rdoutpipe,
			GetCurrentProcess(), &rdslot, 0, FALSE, DUPLICATE_SAME_ACCESS);

		DuplicateHandle(
			GetCurrentProcess(), wrinpipe,
			GetCurrentProcess(), &wrslot, 0, FALSE, DUPLICATE_SAME_ACCESS);

		CloseHandle(rdoutpipe);
		CloseHandle(wrinpipe);

		startup_info.dwFlags|=STARTF_USESTDHANDLES|STARTF_USESHOWWINDOW;
    	startup_info.wShowWindow=SW_HIDE;
	}
638
	if(native && !(mode&EX_OFFLINE)) {
639

640
		if(!(mode&EX_INR) && input_thread_running) {
641
			pthread_mutex_lock(&input_thread_mutex);
642
643
			input_thread_mutex_locked=true;
		}
644
645
646
647
648
649

		if(!(mode&EX_OUTR)) {	 /* Native Socket I/O program */
			/* Enable the Nagle algorithm */
			BOOL nodelay=FALSE;
			setsockopt(client_socket,IPPROTO_TCP,TCP_NODELAY,(char*)&nodelay,sizeof(nodelay));
		}
650
651
	}

652
    success=CreateProcess(
653
654
655
656
		NULL,			// pointer to name of executable module
		fullcmdline,  	// pointer to command line string
		NULL,  			// process security attributes
		NULL,   		// thread security attributes
657
		native && !(mode&EX_OFFLINE),	 			// handle inheritance flag
658
		CREATE_NEW_CONSOLE/*|CREATE_SEPARATE_WOW_VDM*/, // creation flags
659
        env_block, 		// pointer to new environment block
660
661
662
		p_startup_dir,	// pointer to current directory name
		&startup_info,  // pointer to STARTUPINFO
		&process_info  	// pointer to PROCESS_INFORMATION
663
664
665
666
667
		);

	strListFreeBlock(env_block);

	if(!success) {
668
		XTRN_CLEANUP;
669
		if(input_thread_mutex_locked && input_thread_running) {
670
671
672
			pthread_mutex_unlock(&input_thread_mutex);
			input_thread_mutex_locked=false;
		}
673
		SetLastError(last_error);	/* Restore LastError */
674
675
676
677
        errormsg(WHERE, ERR_EXEC, realcmdline, mode);
        return(GetLastError());
    }

678
679
680
681
682
683
684
685
686
687
688
#if 0
	char dbgstr[256];
	sprintf(dbgstr,"Node %d created: hProcess %X hThread %X processID %X threadID %X\n"
		,cfg.node_num
		,process_info.hProcess 
		,process_info.hThread 
		,process_info.dwProcessId 
		,process_info.dwThreadId); 
	OutputDebugString(dbgstr);
#endif

689
690
	CloseHandle(process_info.hThread);

691
692
693
694
695
	if(!native) {

		if(!(mode&EX_OFFLINE) && !nt) {
    		// Wait for notification from VXD that new VM has started
			if((retval=WaitForSingleObject(start_event, 5000))!=WAIT_OBJECT_0) {
696
				XTRN_CLEANUP;
697
                TerminateProcess(process_info.hProcess, __LINE__);
698
				CloseHandle(process_info.hProcess);
699
700
701
702
703
				errormsg(WHERE, ERR_TIMEOUT, "start_event", retval);
				return(GetLastError());
			}

			CloseHandle(start_event);
704
			start_event=NULL;	/* Mark as closed */
705
706
707
708
709
710
711
712
713
714
715

			if(!DeviceIoControl(
				vxd,					// handle to device of interest
				SBBSEXEC_IOCTL_COMPLETE,	// control code of operation to perform
				NULL,					// pointer to buffer to supply input data
				0,						// size of input buffer
				&hVM,					// pointer to buffer to receive output data
				sizeof(hVM),			// size of output buffer
				&rd,					// pointer to variable to receive output byte count
				NULL					// Overlapped I/O
				)) {
716
				XTRN_CLEANUP;
717
                TerminateProcess(process_info.hProcess, __LINE__);
718
				CloseHandle(process_info.hProcess);
719
720
721
722
723
				errormsg(WHERE, ERR_IOCTL, SBBSEXEC_VXD, SBBSEXEC_IOCTL_COMPLETE);
				return(GetLastError());
			}
		}
	}
724
    ReleaseMutex(exec_mutex);
725

726
	/* Disable Ctrl-C checking */
727
	if(!(mode&EX_OFFLINE))
728
		rio_abortable=false;
729

730
    // Executing app in foreground?, monitor
731
    retval=STILL_ACTIVE;
732
    while(!(mode&EX_BG)) {
733
734
		if(mode&EX_CHKTIME)
			gettimeleft();
735
736
        if(!online && !(mode&EX_OFFLINE)) { // Tell VXD/VDD and external that user hung-up
        	if(was_online) {
737
738
				sprintf(str,"%s hung-up in external program",useron.alias);
				logline("X!",str);
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
            	hungup=time(NULL);
				if(!native) {
					if(nt)
						SetEvent(hungup_event);
					else if(!DeviceIoControl(
						vxd,		// handle to device of interest
						SBBSEXEC_IOCTL_DISCONNECT,	// operation to perform
						&hVM,		// pointer to buffer to supply input data
						sizeof(hVM),// size of input buffer
						NULL,		// pointer to buffer to receive output data
						0,			// size of output buffer
						&rd,		// pointer to variable to receive output byte count
						NULL		// Overlapped I/O
						)) {
						errormsg(WHERE, ERR_IOCTL, SBBSEXEC_VXD, SBBSEXEC_IOCTL_DISCONNECT);
						break;
					}
				}
	            was_online=false;
            }
759
            if(hungup && time(NULL)-hungup>5 && !processTerminated) {
760
				lprintf(LOG_INFO,"Node %d Terminating process from line %d",cfg.node_num,__LINE__);
761
762
				processTerminated=TerminateProcess(process_info.hProcess, 2112);
			}
763
        }
764
765
		if((native && !use_pipes) || mode&EX_OFFLINE) {	
			/* Monitor for process termination only */
766
767
			if(WaitForSingleObject(process_info.hProcess,1000)==WAIT_OBJECT_0)
				break;
768
769
		} else {

770
			if(nt || use_pipes) {	// Windows NT/2000
771
772
773
774
775

				/* Write to VDD */

				wr=RingBufPeek(&inbuf,buf,sizeof(buf));
				if(wr) {
776
					if(!use_pipes && wrslot==INVALID_HANDLE_VALUE) {
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
						sprintf(str,"\\\\.\\mailslot\\sbbsexec\\wr%d"
							,cfg.node_num);
						wrslot=CreateFile(str
							,GENERIC_WRITE
							,FILE_SHARE_READ
							,NULL
							,OPEN_EXISTING
							,FILE_ATTRIBUTE_NORMAL
							,(HANDLE) NULL);
#if 0
						if(wrslot==INVALID_HANDLE_VALUE) {
							errormsg(WHERE,ERR_OPEN,str,0);
							break;
						}
#endif
					}
793
					
794
795
796
797
798
					/* CR expansion */
					if(use_pipes) 
						bp=cr_expand(buf,wr,output_buf,wr);
					else
						bp=buf;
799

800
					if(wrslot!=INVALID_HANDLE_VALUE
801
						&& WriteFile(wrslot,bp,wr,&len,NULL)==TRUE) {
802
803
						RingBufRead(&inbuf, NULL, len);
						wr=len;
804
						if(use_pipes && !(mode&EX_NOECHO)) {
805
							/* echo */
806
							RingBufWrite(&outbuf, bp, wr);
807
						}
808
809
810
811
812
813
					} else		// VDD not loaded yet
						wr=0;
				}

				/* Read from VDD */

814
				rd=0;
815
				len=sizeof(buf);
816
				avail=RingBufFree(&outbuf)/2;	// leave room for wwiv/telnet expansion
817
#if 0
818
				if(avail==0)
819
					lprintf("Node %d !output buffer full (%u bytes)"
820
						,cfg.node_num,RingBufFull(&outbuf));
821
#endif
822
823
				if(len>avail)
            		len=avail;
824

825
				while(rd<len) {
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
					DWORD waiting=0;

					if(use_pipes)
						PeekNamedPipe(
							rdslot,             // handle to pipe to copy from
							NULL,               // pointer to data buffer
							0,					// size, in bytes, of data buffer
							NULL,				// pointer to number of bytes read
							&waiting,			// pointer to total number of bytes available
							NULL				// pointer to unread bytes in this message
							);
					else
						GetMailslotInfo(
							rdslot,				// mailslot handle 
 							NULL,				// address of maximum message size 
							NULL,				// address of size of next message 
							&waiting,			// address of number of messages 
 							NULL				// address of read time-out 
							);
					if(!waiting)
						break;
					if(ReadFile(rdslot,buf+rd,len-rd,&msglen,NULL)==FALSE || msglen<1)
						break;
					rd+=msglen;
				}

				if(rd) {
853
854
855
856
					if(mode&EX_WWIV) {
                		bp=wwiv_expand(buf, rd, wwiv_buf, rd, useron.misc, wwiv_flag);
						if(rd>sizeof(wwiv_buf))
							errorlog("WWIV_BUF OVERRUN");
857
858
					} else if(telnet_mode&TELNET_MODE_OFF) {
						bp=buf;
859
					} else {
860
                		bp=telnet_expand(buf, rd, telnet_buf, rd);
861
862
863
						if(rd>sizeof(telnet_buf))
							errorlog("TELNET_BUF OVERRUN");
					}
864
865
866
					if(rd>RingBufFree(&outbuf)) {
						errorlog("output buffer overflow");
						rd=RingBufFree(&outbuf);
867
					}
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
					RingBufWrite(&outbuf, bp, rd);
				}
			} else {	// Windows 9x

				/* Write to VXD */

				wr=RingBufPeek(&inbuf, buf+sizeof(hVM),sizeof(buf)-sizeof(hVM));
				if(wr) {
					*(DWORD*)buf=hVM;
					wr+=sizeof(hVM);
					if(!DeviceIoControl(
						vxd,					// handle to device of interest
						SBBSEXEC_IOCTL_WRITE,	// control code of operation to perform
						buf,					// pointer to buffer to supply input data
						wr,						// size of input buffer
						&rd,					// pointer to buffer to receive output data
						sizeof(rd),				// size of output buffer
						&dummy,	 				// pointer to variable to receive output byte count
						NULL					// Overlapped I/O
						)) {
						errormsg(WHERE, ERR_IOCTL, SBBSEXEC_VXD, SBBSEXEC_IOCTL_READ);
						break;
					}
					RingBufRead(&inbuf, NULL, rd);
					wr=rd;
				}
        		/* Read from VXD */
				rd=0;
				len=sizeof(buf);
897
898
				avail=RingBufFree(&outbuf)/2;	// leave room for wwiv/telnet expansion
#if 0
899
				if(avail==0) 
900
					lprintf("Node %d !output buffer full (%u bytes)"
901
						,cfg.node_num,RingBufFull(&outbuf));
902
#endif
903

904
905
				if(len>avail)
            		len=avail;
906
				if(len) {
907
908
909
910
911
912
913
914
915
916
917
918
919
					if(!DeviceIoControl(
						vxd,					// handle to device of interest
						SBBSEXEC_IOCTL_READ,	// control code of operation to perform
						&hVM,					// pointer to buffer to supply input data
						sizeof(hVM),			// size of input buffer
						buf,					// pointer to buffer to receive output data
						len,					// size of output buffer
						&rd,					// pointer to variable to receive output byte count
						NULL					// Overlapped I/O
						)) {
						errormsg(WHERE, ERR_IOCTL, SBBSEXEC_VXD, SBBSEXEC_IOCTL_READ);
						break;
					}
920
					if(mode&EX_WWIV) {
921
                		bp=wwiv_expand(buf, rd, wwiv_buf, rd, useron.misc, wwiv_flag);
922
923
						if(rd>sizeof(wwiv_buf))
							errorlog("WWIV_BUF OVERRUN");
924
925
					} else if(telnet_mode&TELNET_MODE_OFF) {
						bp=buf;
926
					} else {
927
                		bp=telnet_expand(buf, rd, telnet_buf, rd);
928
929
930
931
932
933
934
						if(rd>sizeof(telnet_buf))
							errorlog("TELNET_BUF OVERRUN");
					}
					if(rd>RingBufFree(&outbuf)) {
						errorlog("output buffer overflow");
						rd=RingBufFree(&outbuf);
					}
935
936
937
					RingBufWrite(&outbuf, bp, rd);
				}
			}
938
#if defined(_DEBUG) && 0
939
940
941
942
943
944
			if(rd>1) {
				sprintf(str,"Node %d read %5d bytes from xtrn", cfg.node_num, rd);
				OutputDebugString(str);
			}
#endif
            if((!rd && !wr) || hungup) {
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962

				loop_since_io++;	/* number of loop iterations with no I/O */

				/* only check process termination after 300 milliseconds of no I/O */
				/* to allow for last minute reception of output from DOS programs */
				if(loop_since_io>=3
					&& WaitForSingleObject(process_info.hProcess,0)==WAIT_OBJECT_0)
					break;	/* Process Terminated */

				/* only check node for interrupt flag every 3 seconds of no I/O */
				if((loop_since_io%30)==0) {	
					// Check if the node has been interrupted
					getnodedat(cfg.node_num,&thisnode,0);
					if(thisnode.misc&NODE_INTR)
						break;
				}

				/* only send telnet GA every 30 seconds of no I/O */
963
				if((loop_since_io%300)==0) {
964
#if defined(_DEBUG)
965
966
967
968
969
970
971
					sprintf(str,"Node %d xtrn idle\n",cfg.node_num);
					OutputDebugString(str);
#endif
					// Let's make sure the socket is up
					// Sending will trigger a socket d/c detection
					if(!(startup->options&BBS_OPT_NO_TELNET_GA))
						send_telnet_cmd(TELNET_GA,0);
972
				}
973
				sem_trywait_block(&inbuf.sem,100);
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
            } else
				loop_since_io=0;
        }
	}

	if(!native && !(mode&EX_OFFLINE) && !nt) {
		if(!DeviceIoControl(
			vxd,					// handle to device of interest
			SBBSEXEC_IOCTL_STOP,	// control code of operation to perform
			&hVM,					// pointer to buffer to supply input data
			sizeof(hVM),			// size of input buffer
			NULL,					// pointer to buffer to receive output data
			0,						// size of output buffer
			&rd,					// pointer to variable to receive output byte count
			NULL					// Overlapped I/O
			)) {
			errormsg(WHERE, ERR_IOCTL, SBBSEXEC_VXD, SBBSEXEC_IOCTL_STOP);
		}
	}

994
    if(!(mode&EX_BG)) {			/* !background execution */
995

996
997
998
        if(GetExitCodeProcess(process_info.hProcess, &retval)==FALSE)
            errormsg(WHERE, ERR_CHK, "ExitCodeProcess",(DWORD)process_info.hProcess);

999
		if(retval==STILL_ACTIVE) {
1000
			lprintf(LOG_INFO,"Node %d Terminating process from line %d",cfg.node_num,__LINE__);
1001
			TerminateProcess(process_info.hProcess, GetLastError());
1002
		}	
1003

1004
	 	// Get return value
1005
1006
1007
1008
1009
1010
1011
		if(!native) {
    		sprintf(str,"%sDOSXTRN.RET", cfg.node_dir);
			FILE* fp=fopen(str,"r");
			if(fp!=NULL) {
				fscanf(fp,"%d",&retval);
				fclose(fp);
			}
1012
1013
1014
		}
	}

1015
	XTRN_CLEANUP;
1016
	CloseHandle(process_info.hProcess);
1017
1018
1019

	if(!(mode&EX_OFFLINE)) {	/* !off-line execution */

1020
		if(native) {
1021
1022
			
			/* Re-enable blocking (incase disabled by xtrn program) */
1023
1024
			ulong l=0;
			ioctlsocket(client_socket, FIONBIO, &l);
1025
1026
1027
1028
1029

			/* Re-set socket options */
			if(set_socket_options(&cfg, client_socket, str))
				lprintf(LOG_ERR,"%04d !ERROR %s",client_socket, str);

1030
			if(input_thread_mutex_locked && input_thread_running) {
1031
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				pthread_mutex_unlock(&input_thread_mutex);
				input_thread_mutex_locked=false;
			}
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		}
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		curatr=~0;			// Can't guarantee current attributes
		attr(LIGHTGRAY);	// Force to "normal"
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		rio_abortable=rio_abortable_save;	// Restore abortable state
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		/* Got back to Text/NVT mode */
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		request_telnet_opt(TELNET_DONT,TELNET_BINARY_TX);
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	}
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//	lprintf("%s returned %d",realcmdline, retval);

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	errorlevel = retval; // Baja or JS retrievable error value
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	return(retval);
}

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#else	/* !WIN32 */

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/*****************************************************************************/
// Expands Unix LF to CRLF
/*****************************************************************************/
BYTE* lf_expand(BYTE* inbuf, ulong inlen, BYTE* outbuf, ulong& newlen)
{
	ulong	i,j;

	for(i=j=0;i<inlen;i++) {
		if(inbuf[i]=='\n' && (!i || inbuf[i-1]!='\r'))
			outbuf[j++]='\r';
		outbuf[j++]=inbuf[i];
	}
	newlen=j;
    return(outbuf);
}

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#define MAX_ARGS 1000

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#ifdef NEEDS_SETENV
static int setenv(const char *name, const char *value, int overwrite)
{
	char *envstr;
	char *oldenv;
	if(overwrite || getenv(name)==NULL) {
		envstr=(char *)malloc(strlen(name)+strlen(value)+2);
		if(envstr==NULL) {
			errno=ENOMEM;
			return(-1);
		}
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		/* ToDo: (comment for shurd) */
		/* Uh... I'm pretty sure we're missing an sprintf() call here or something... */
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		putenv(envstr);
	}
	return(0);
}
#endif

#ifdef NEEDS_CFMAKERAW
void
cfmakeraw(struct termios *t)
{
	t->c_iflag &= ~(IMAXBEL|IGNBRK|BRKINT|PARMRK|ISTRIP|INLCR|IGNCR|ICRNL|IXON);
	t->c_oflag &= ~OPOST;
	t->c_lflag &= ~(ECHO|ECHONL|ICANON|ISIG|IEXTEN);
	t->c_cflag &= ~(CSIZE|PARENB);
	t->c_cflag |= CS8;
}
#endif

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#ifdef NEEDS_FORKPTY
static int login_tty(int fd)
{
	(void) setsid();
	if (!isatty(fd))
		return (-1);
	(void) dup2(fd, 0);
	(void) dup2(fd, 1);
	(void) dup2(fd, 2);
	if (fd > 2)
		(void) close(fd);
	return (0);
}

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#ifdef NEEDS_DAEMON
/****************************************************************************/
/* Daemonizes the process                                                   */
/****************************************************************************/
int
daemon(int nochdir, int noclose)
{
    int fd;

    switch (fork()) {
    case -1:
        return (-1);
    case 0:
        break;
    default:
        _exit(0);
    }

    if (setsid() == -1)
        return (-1);

    if (!nochdir)
        (void)chdir("/");

    if (!noclose && (fd = open(_PATH_DEVNULL, O_RDWR, 0)) != -1) {
        (void)dup2(fd, STDIN_FILENO);
        (void)dup2(fd, STDOUT_FILENO);
        (void)dup2(fd, STDERR_FILENO);
        if (fd > 2)
            (void)close(fd);
    }
    return (0);
}
#endif

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static int openpty(int *amaster, int *aslave, char *name, struct termios *termp, winsize *winp)
{
	char line[] = "/dev/ptyXX";
	const char *cp1, *cp2;
	int master, slave, ttygid;
	struct group *gr;

	if ((gr = getgrnam("tty")) != NULL)
		ttygid = gr->gr_gid;
	else
		ttygid = -1;

	for (cp1 = "pqrsPQRS"; *cp1; cp1++) {
		line[8] = *cp1;
		for (cp2 = "0123456789abcdefghijklmnopqrstuv"; *cp2; cp2++) {
			line[5] = 'p';
			line[9] = *cp2;
			if ((master = open(line, O_RDWR, 0)) == -1) {
				if (errno == ENOENT)
					break; /* try the next pty group */
			} else {
				line[5] = 't';
				(void) chown(line, getuid(), ttygid);
				(void) chmod(line, S_IRUSR|S_IWUSR|S_IWGRP);
				/* Hrm... SunOS doesn't seem to have revoke
				(void) revoke(line); */
				if ((slave = open(line, O_RDWR, 0)) != -1) {
					*amaster = master;
					*aslave = slave;
					if (name)
						strcpy(name, line);
					if (termp)
						(void) tcsetattr(slave,
							TCSAFLUSH, termp);
					if (winp)
						(void) ioctl(slave, TIOCSWINSZ,
							(char *)winp);
					return (0);
				}
				(void) close(master);
			}
		}
	}
	errno = ENOENT;	/* out of ptys */
	return (-1);
}

static int forkpty(int *amaster, char *name, termios *termp, winsize *winp)
{
	int master, slave, pid;

	if (openpty(&master, &slave, name, termp, winp) == -1)
		return (-1);
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	switch (pid = FORK()) {
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	case -1:
		return (-1);
	case 0:
		/*
		 * child
		 */
		(void) close(master);
		login_tty(slave);
		return (0);
	}
	/*
	 * parent
	 */
	*amaster = master;
	(void) close(slave);
	return (pid);
}
#endif /* NEED_FORKPTY */

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int sbbs_t::external(const char* cmdline, long mode, const char* startup_dir)
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{
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	char	str[MAX_PATH+1];
	char	fname[MAX_PATH+1];
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	char	fullpath[MAX_PATH+1];
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	char	fullcmdline[MAX_PATH+1];
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	char*	argv[MAX_ARGS];
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	char*	p;
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	BYTE*	bp;
	BYTE	buf[XTRN_IO_BUF_LEN];
    BYTE 	output_buf[XTRN_IO_BUF_LEN*2];
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	ulong	avail;
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    ulong	output_len;
	bool	native=false;			// DOS program by default
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	bool	rio_abortable_save=rio_abortable;
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	int		i;
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	bool	data_waiting;
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	int		rd;
	int		wr;
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	int		argc;
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	pid_t	pid;