xtrn.cpp 37.1 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)		*
 *																			*
 * Copyright 2000 Rob Swindell - http://www.synchro.net/copyright.html		*
 *																			*
 * 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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#ifdef __unix__
	#include <sys/wait.h>	// WEXITSTATUS
#endif

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#define XTRN_IO_BUF_LEN 5000

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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 */	\
		sprintf(str,"%.*s",sizeof(str)-1,cmdline+1);		\
		p=strchr(str,SP);									\
		if(p) {												\
			strcpy(main_csi.str,p+1);						\
			*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 												*/
/****************************************************************************/
int sbbs_t::external(char* cmdline, long mode, char* startup_dir)
{
	char	str[256],*p,*p_startup_dir;
	char	fname[128];
    char	fullcmdline[256];
	char	realcmdline[256];
	char	comspec_str[128];
	char	title[256];
	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;
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	bool	use_pipes=false;	// NT-compatible console redirection
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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;
	DWORD	dummy;	
	DWORD	retval;
	DWORD	last_error;
	DWORD	loop_since_io=0;
	struct	tm * tm_p;
	sbbsexec_start_t start;
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	OPENVXDHANDLE OpenVxDHandle;
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	if(online==ON_LOCAL)
		eprintf("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 */

    strcpy(str,cmdline);		/* Set str to program name only */
    p=strchr(str,SP);
    if(p) *p=0;
    strcpy(fname,str);

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    p=strrchr(fname,'/');
    if(!p) p=strrchr(fname,'\\');
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    if(!p) p=strchr(fname,':');
    if(!p) p=fname;
    else   p++;

    for(i=0;i<cfg.total_natvpgms;i++)
        if(!stricmp(p,cfg.natvpgm[i]->name))
            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);

	strcpy(realcmdline, fullcmdline);	// for errormsg if failed to execute

	now=time(NULL);
	tm_p=gmtime(&now);

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	if((retval=WaitForSingleObject(exec_mutex,5000))!=WAIT_OBJECT_0) {
		errormsg(WHERE, ERR_TIMEOUT, "exec_mutex", retval);
		return(GetLastError());
	}

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	OpenVxDHandle=GetAddressOfOpenVxDHandle();

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

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

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 	if(native || mode&EX_OFFLINE) { // Native (32-bit) external
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		// Current environment passed to child process
		sprintf(dszlog,"DSZLOG=%sPROTOCOL.LOG",cfg.node_dir);
		sprintf(sbbsnode,"SBBSNODE=%s",cfg.node_dir);
		sprintf(sbbsnnum,"SBBSNNUM=%d",cfg.node_num);
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		sprintf(sbbsctrl,"SBBSCTRL=%s",cfg.ctrl_dir);
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		putenv(dszlog); 		/* Makes the DSZ LOG active */
		putenv(sbbsnode);
		putenv(sbbsnnum);
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		putenv(sbbsctrl);
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		if(tm_p!=NULL) {		/* date/time env vars */
			sprintf(env_day			,"DAY=%02u"			,tm_p->tm_mday);
			sprintf(env_weekday		,"WEEKDAY=%s"		,wday[tm_p->tm_wday]);
			sprintf(env_monthname	,"MONTHNAME=%s"		,mon[tm_p->tm_mon]);
			sprintf(env_month		,"MONTH=%02u"		,tm_p->tm_mon+1);
			sprintf(env_year		,"YEAR=%u"			,1900+tm_p->tm_year);
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			putenv(env_day);
			putenv(env_weekday);
			putenv(env_monthname);
			putenv(env_month);
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			if(putenv(env_year))
        		errormsg(WHERE,ERR_WRITE,"environment",0);
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		}
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    } else { // DOS external

		sprintf(str,"%sDOSXTRN.RET", cfg.node_dir);
		remove(str);

    	// Create temporary environment file
    	sprintf(str,"%sDOSXTRN.ENV", cfg.node_dir);
        FILE* fp=fopen(str,"w");
        if(fp==NULL) {
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			XTRN_CLEANUP;
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        	errormsg(WHERE, ERR_CREATE, str, 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, "SBBSCTRL=%s\n", cfg.ctrl_dir);
        fprintf(fp, "SBBSNODE=%s\n", cfg.node_dir);
        fprintf(fp, "SBBSNNUM=%d\n", cfg.node_num);
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		if(tm_p!=NULL) {	/* date/time env vars */
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			fprintf(fp, "DAY=%02u\n", tm_p->tm_mday);
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			fprintf(fp, "WEEKDAY=%s\n",wday[tm_p->tm_wday]);
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			fprintf(fp, "MONTHNAME=%s\n",mon[tm_p->tm_mon]);
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			fprintf(fp, "MONTH=%02u\n",tm_p->tm_mon+1);
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			fprintf(fp, "YEAR=%u\n",1900+tm_p->tm_year);
		}
        fclose(fp);

        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) {
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				XTRN_CLEANUP;
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				errormsg(WHERE, ERR_CREATE, "exec start event", 0);
				return(GetLastError());
			}

			sprintf(str,"\\\\.\\mailslot\\sbbsexec\\rd%d"
				,cfg.node_num);
			rdslot=CreateMailslot(str
				,sizeof(buf)			// Maximum message size (0=unlimited)
				,0						// Read time-out
				,NULL);                 // Security
			if(rdslot==INVALID_HANDLE_VALUE) {
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				XTRN_CLEANUP;
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				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) {
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				XTRN_CLEANUP;
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				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) {
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				XTRN_CLEANUP;
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				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;

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

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			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
				)) {
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				XTRN_CLEANUP;
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				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;
	}
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    if(startup->options&BBS_OPT_XTRN_MINIMIZED) {
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    	startup_info.wShowWindow=SW_SHOWMINNOACTIVE;
        startup_info.dwFlags|=STARTF_USESHOWWINDOW;
    }
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	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;

		// Create the child output pipe.
		if (!CreatePipe(&rdoutpipe,&startup_info.hStdOutput,&sa,0)) {
			errormsg(WHERE,ERR_CREATE,"stdout pipe",0);
			return(GetLastError());
		}
		startup_info.hStdError=startup_info.hStdOutput;

		// Create the child input pipe.
		if (!CreatePipe(&startup_info.hStdInput,&wrinpipe,&sa,0)) {
			errormsg(WHERE,ERR_CREATE,"stdin pipe",0);
			return(GetLastError());
		}
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		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;
	}
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	if(native && !(mode&EX_OFFLINE)) {
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		/* temporary */
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		FILE* fp;
		sprintf(fname,"%sDOOR32.SYS",cfg.node_dir);
		fp=fopen(fname,"wb");
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		fprintf(fp,"%d\r\n%d\r\n38400\r\n%s%c\r\n%d\r\n%s\r\n%s\r\n%d\r\n%d\r\n"
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			"%d\r\n%d\r\n"
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			,mode&EX_OUTR ? 0 /* Local */ : 2 /* Telnet */
			,mode&EX_OUTR ? INVALID_SOCKET : client_socket_dup
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			,VERSION_NOTICE,REVISION
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			,useron.number
			,useron.name
			,useron.alias
			,useron.level
			,timeleft/60
			,useron.misc&ANSI ? 1 : 0
			,cfg.node_num);
		fclose(fp);
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		/* not temporary */
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		if(!(mode&EX_INR)) 
			pthread_mutex_lock(&input_thread_mutex);
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	}

    if(!CreateProcess(
		NULL,			// pointer to name of executable module
		fullcmdline,  	// pointer to command line string
		NULL,  			// process security attributes
		NULL,   		// thread security attributes
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		native && !(mode&EX_OFFLINE),	 			// handle inheritance flag
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		CREATE_NEW_CONSOLE/*|CREATE_SEPARATE_WOW_VDM*/, // creation flags
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        NULL,  			// pointer to new environment block
		p_startup_dir,	// pointer to current directory name
		&startup_info,  // pointer to STARTUPINFO
		&process_info  	// pointer to PROCESS_INFORMATION
		)) {
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		XTRN_CLEANUP;
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		if(native && !(mode&EX_OFFLINE))
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			pthread_mutex_unlock(&input_thread_mutex);
		SetLastError(last_error);	/* Restore LastError */
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        errormsg(WHERE, ERR_EXEC, realcmdline, mode);
        return(GetLastError());
    }

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#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

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	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) {
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				XTRN_CLEANUP;
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                TerminateProcess(process_info.hProcess, __LINE__);
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				errormsg(WHERE, ERR_TIMEOUT, "start_event", retval);
				return(GetLastError());
			}

			CloseHandle(start_event);
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			start_event=NULL;	/* Mark as closed */
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			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
				)) {
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                TerminateProcess(process_info.hProcess, __LINE__);
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				errormsg(WHERE, ERR_IOCTL, SBBSEXEC_VXD, SBBSEXEC_IOCTL_COMPLETE);
				return(GetLastError());
			}
		}
	}
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    ReleaseMutex(exec_mutex);
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	/* Disable Ctrl-C checking */
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	if(!(mode&EX_OFFLINE)) {
		rio_abortable_save=rio_abortable;
		rio_abortable=false;
	}
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    // Executing app in foreground?, monitor
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    retval=STILL_ACTIVE;
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    while(!(mode&EX_BG)) {
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        if(!online && !(mode&EX_OFFLINE)) { // Tell VXD/VDD and external that user hung-up
        	if(was_online) {
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				sprintf(str,"%s hung-up in external program",useron.alias);
				logline("X!",str);
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            	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;
            }
            if(hungup && time(NULL)-hungup>5) 
                TerminateProcess(process_info.hProcess, 2112);
        }
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		if((native && !use_pipes) || mode&EX_OFFLINE) {	
			/* Monitor for process termination only */
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            if(GetExitCodeProcess(process_info.hProcess, &retval)==FALSE) {
                errormsg(WHERE, ERR_CHK, "ExitCodeProcess"
                   ,(DWORD)process_info.hProcess);
                break;
            }
            if(retval!=STILL_ACTIVE)
                break;
        	Sleep(500);
		} else {

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			if(nt || use_pipes) {	// Windows NT/2000
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				/* Write to VDD */

				wr=RingBufPeek(&inbuf,buf,sizeof(buf));
				if(wr) {
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					if(!use_pipes && wrslot==INVALID_HANDLE_VALUE) {
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						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
					}
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					/* CR expansion */
					if(use_pipes) 
						bp=cr_expand(buf,wr,output_buf,wr);
					else
						bp=buf;
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					if(wrslot!=INVALID_HANDLE_VALUE
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						&& WriteFile(wrslot,bp,wr,&len,NULL)==TRUE) {
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						RingBufRead(&inbuf, NULL, len);
						wr=len;
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						if(use_pipes) {
							/* echo */
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							RingBufWrite(&outbuf, bp, wr);
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							sem_post(&output_sem);
						}
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					} else		// VDD not loaded yet
						wr=0;
				}

				/* Read from VDD */

				len=sizeof(buf);
				avail=RingBufFree(&outbuf);
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				if(avail==0) 
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					lprintf("Node %d !output buffer full (%u bytes)"
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						,cfg.node_num,RingBufFull(&outbuf));
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				if(len>avail)
            		len=avail;
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				rd=0;
				DWORD waiting=1;

				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
						);
 
				if(avail>=RingBufFull(&outbuf) && waiting 
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					&& ReadFile(rdslot,buf,len,&rd,NULL)==TRUE && rd>0) {
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					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");
					} else {
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                		bp=telnet_expand(buf, rd, telnet_buf, rd);
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						if(rd>sizeof(telnet_buf))
							errorlog("TELNET_BUF OVERRUN");
					}
					RingBufWrite(&outbuf, bp, rd);
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					sem_post(&output_sem);
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				}
			} 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);
				avail=RingBufFree(&outbuf);
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				if(avail==0) 
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					lprintf("Node %d !output buffer full (%u bytes)"
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						,cfg.node_num,RingBufFull(&outbuf));

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				if(len>avail)
            		len=avail;
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				if(avail>=RingBufFull(&outbuf)) {
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					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;
					}
#if 0
					if(rd>1)
                		lprintf("read %d bytes from xtrn", rd);
#endif

					if(mode&EX_WWIV)
                		bp=wwiv_expand(buf, rd, wwiv_buf, rd, useron.misc, wwiv_flag);
					else
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                		bp=telnet_expand(buf, rd, telnet_buf, rd);
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					RingBufWrite(&outbuf, bp, rd);
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					sem_post(&output_sem);
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				}
			}
            if(!rd && !wr) {
				if(++loop_since_io>=1000) {
	                if(GetExitCodeProcess(process_info.hProcess, &retval)==FALSE) {
	                    errormsg(WHERE, ERR_CHK, "ExitCodeProcess"
						,(DWORD)process_info.hProcess);
						break;
					}
					if(retval!=STILL_ACTIVE)  {
#if 0
						if(hungup)
							Sleep(5000);	// Give the application time to close files
#endif
	                    break;
					}
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					if(!(loop_since_io%3000)) {
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						OutputDebugString(".");

						// Let's make sure the socket is up
						// Sending will trigger a socket d/c detection
						sprintf(str,"%c%c",TELNET_IAC,TELNET_GA);
						putcom(str,2);

						// Check if the node has been interrupted
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						getnodedat(cfg.node_num,&thisnode,0);
						if(thisnode.misc&NODE_INTR)
							break;
					}
					Sleep(1);
				}
            } 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);
		}
	}

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    if(!(mode&EX_BG)) {			/* !background execution */
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		if(retval==STILL_ACTIVE)
			TerminateProcess(process_info.hProcess, GetLastError());
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	 	// Get return value
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    	sprintf(str,"%sDOSXTRN.RET", cfg.node_dir);
        FILE* fp=fopen(str,"r");
        if(fp!=NULL) {
			fscanf(fp,"%d",&retval);
			fclose(fp);
		}
	}

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	XTRN_CLEANUP;

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

		if(native)
			pthread_mutex_unlock(&input_thread_mutex);
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		curatr=0;	// Can't guarantee current attributes
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		rio_abortable=rio_abortable_save;	// Restore abortable state
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		/* Got back to Text/NVT mode */
		sprintf(str,"%c%c%c",TELNET_IAC,TELNET_DONT,TELNET_BINARY);
		putcom(str,3);
		telnet_mode&=~TELNET_MODE_BIN_RX;
	}
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//	lprintf("%s returned %d",realcmdline, retval);

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	errorlevel = retval; // Baja-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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int sbbs_t::external(char* cmdline, long mode, char* startup_dir)
{
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	char	str[256];
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	char	fname[128];
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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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	int		i;
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	int		rd;
	int		wr;
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	int		argc;
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	pid_t	pid;
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	int		in_pipe[2];
	int		out_pipe[2];
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	XTRN_LOADABLE_MODULE;
	XTRN_LOADABLE_JS_MODULE;
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	attr(cfg.color[clr_external]);        /* setup default attributes */

    strcpy(str,cmdline);		/* Set str to program name only */
    p=strchr(str,SP);
    if(p) *p=0;
    strcpy(fname,str);

    p=strrchr(fname,'/');
    if(!p) p=strrchr(fname,'\\');
    if(!p) p=strchr(fname,':');
    if(!p) p=fname;
    else   p++;

    for(i=0;i<cfg.total_natvpgms;i++)
        if(!stricmp(p,cfg.natvpgm[i]->name))
            break;
    if(i<cfg.total_natvpgms || mode&EX_NATIVE)
        native=true;

	if(!native) {
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		bprintf("\r\nExternal DOS programs are not yet supported in\r\n%s\r\n",VERSION_NOTICE);
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		return(-1);
	}

 	if(native) { // Native (32-bit) external

		// Current environment passed to child process
		sprintf(dszlog,"DSZLOG=%sPROTOCOL.LOG",cfg.node_dir);
		sprintf(sbbsnode,"SBBSNODE=%s",cfg.node_dir);
		sprintf(sbbsnnum,"SBBSNNUM=%d",cfg.node_num);
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		sprintf(sbbsctrl,"SBBSCTRL=%s",cfg.ctrl_dir);
		putenv(dszlog); 		/* Makes the DSZ LOG active */
		putenv(sbbsnode);
		putenv(sbbsnnum);
		if(putenv(sbbsctrl))
        	errormsg(WHERE,ERR_WRITE,"environment",0);
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	} else {
		/* setup DOSemu env here */
	}

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	if(!(mode&EX_INR))
		pthread_mutex_lock(&input_thread_mutex);
#if 1	
	if(mode&EX_INR)
		if(pipe(in_pipe)!=0) {
			errormsg(WHERE,ERR_CREATE,"in_pipe",0);
			return(-1);
		}
#endif		
	if(mode&EX_OUTR)
		if(pipe(out_pipe)!=0) {
			errormsg(WHERE,ERR_CREATE,"out_pipe",0);
			return(-1);
		}
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	if((pid=fork())==-1) {
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		pthread_mutex_unlock(&input_thread_mutex);
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		errormsg(WHERE,ERR_EXEC,cmdline,0);
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		return(-1);
	}
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	if(pid==0) {	/* child process */
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		if(startup_dir!=NULL && startup_dir[0])
			chdir(startup_dir);
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		lprintf("Node %d executing external: %s",cfg.node_num,cmdline);
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		if(mode&EX_SH || strcspn(cmdline,"<>|;")!=strlen(cmdline)) {
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			argv[0]=comspec;
			argv[1]="-c";
			argv[2]=cmdline;
			argv[3]=NULL;
		} else {
			argv[0]=cmdline;	/* point to the beginning of the string */
			argc=1;
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			for(i=0;cmdline[i] && argc<MAX_ARGS;i++)	/* Break up command line */
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				if(cmdline[i]==SP) {
					cmdline[i]=0;			/* insert nulls */
					argv[argc++]=cmdline+i+1; /* point to the beginning of the next arg */
				}
			argv[argc]=NULL;
		}
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		if(mode&EX_INR)  {
			close(in_pipe[1]);		/* close write-end of pipe */
			dup2(in_pipe[0],0);		/* redirect stdin */
			close(in_pipe[0]);		/* close excess file descriptor */
		}
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		if(mode&EX_OUTR) {
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			close(out_pipe[0]);		/* close read-end of pipe */
			dup2(out_pipe[1],1);	/* stdout */
			dup2(out_pipe[1],2);	/* stderr */
			close(out_pipe[1]);		/* close excess file descriptor */
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		}	

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		execvp(argv[0],argv);
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		sprintf(str,"!ERROR %d executing %s",errno,argv[0]);
		errorlog(str);
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		exit(-1);	/* should never get here */
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	}
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	if(mode&EX_OUTR) {
		close(out_pipe[1]);	/* close write-end of pipe */
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		while(!terminated) {
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			if(waitpid(pid, &i, WNOHANG)!=0)	/* child exited */
				break;
			
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			if(!online && !(mode&EX_OFFLINE)) {
				sprintf(str,"%s hung-up in external program",useron.alias);
				logline("X!",str);
				break;
			}

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			/* Input */	
			if(mode&EX_INR && RingBufFull(&inbuf)) {
				if((wr=RingBufRead(&inbuf,buf,sizeof(buf)))!=0)
					write(in_pipe[1],buf,wr);
			}
				
			/* Output */
			ioctl(out_pipe[0],FIONREAD,&rd);	/* peek at input */
			if(!rd) {
				mswait(1);
				continue;
			}
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			avail=RingBufFree(&outbuf);
			if(avail==0) {
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				lprintf("Node %d !output buffer full (%u bytes)"
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					,cfg.node_num,RingBufFull(&outbuf));
				mswait(1);
				continue;
			}

			if(rd>avail)
				rd=avail;
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			if(rd>sizeof(buf))
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				rd=sizeof(buf);

			if((rd=read(out_pipe[0],buf,rd))<1) {
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				mswait(1);
				continue;
			}
			if(mode&EX_BIN)	/* telnet IAC expansion */
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           		bp=telnet_expand(buf, rd, output_buf, output_len);
1055
1056
1057
			else			/* LF to CRLF expansion */
				bp=lf_expand(buf, rd, output_buf, output_len);
			
1058
1059
			/* Does expanded size fit? */
			if(output_len>RingBufFree(&outbuf)) {
1060
				lprintf("Node %d !output buffer overflow (%u bytes)"
1061
1062
1063
1064
1065
					,cfg.node_num,output_len);
				mswait(1);
				continue;
			}

1066
1067
1068
			RingBufWrite(&outbuf, bp, output_len);
			sem_post(&output_sem);	
		}
1069

1070
1071
1072
		if(waitpid(pid, &i, WNOHANG)==0)  {		// Child still running? 
			kill(pid, SIGHUP);					// Tell child user has hung up
			time_t start=time(NULL);			// Wait up to 10 seconds
1073
			while(time(NULL)-start<10) {		// for child to terminate
1074
1075
1076
1077
1078
1079
1080
				if(waitpid(pid, &i, WNOHANG)!=0)
					break;
				mswait(500);
			}
			if(waitpid(pid, &i, WNOHANG)==0)	// Child still running?
				kill(pid, SIGKILL);				// terminate child process
		}
1081
1082
1083
1084
		/* close unneeded descriptors */
		if(mode&EX_INR)
			close(in_pipe[1]);
		close(out_pipe[0]);
1085
	}
1086

1087
1088
	if(!(mode&EX_BG))	/* !background execution, wait for child to terminate */
		waitpid(pid, &i, 0);
1089
1090
1091
1092

	pthread_mutex_unlock(&input_thread_mutex);

	return(WEXITSTATUS(i));
1093
1094
1095
1096
}

#endif	/* !WIN32 */

1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
uint fakeriobp=0xffff;

/*****************************************************************************/
/* Returns command line generated from instr with %c replacments             */
/*****************************************************************************/
char * sbbs_t::cmdstr(char *instr, char *fpath, char *fspec, char *outstr)
{
	char	str[256],*cmd;
    int		i,j,len;

    if(outstr==NULL)
        cmd=cmdstr_output;
    else
        cmd=outstr;
    len=strlen(instr);
    for(i=j=0;i<len && j<sizeof(cmdstr_output);i++) {
        if(instr[i]=='%') {
            i++;
            cmd[j]=0;
            switch(toupper(instr[i])) {
                case 'A':   /* User alias */
                    strcat(cmd,useron.alias);
                    break;
                case 'B':   /* Baud (DTE) Rate */
                    strcat(cmd,ultoa(dte_rate,str,10));
                    break;
                case 'C':   /* Connect Description */
                    strcat(cmd,connection);
                    break;
                case 'D':   /* Connect (DCE) Rate */
                    strcat(cmd,ultoa((ulong)cur_rate,str,10));
                    break;
                case 'E':   /* Estimated Rate */
                    strcat(cmd,ultoa((ulong)cur_cps*10,str,10));
                    break;
                case 'F':   /* File path */
                    strcat(cmd,fpath);
                    break;
                case 'G':   /* Temp directory */
                    strcat(cmd,cfg.temp_dir);
                    break;
                case 'H':   /* Port Handle or Hardware Flow Control */
1139
1140
1141
#if defined(__unix__)
					strcat(cmd,ultoa(client_socket,str,10));
#else
1142
                    strcat(cmd,ultoa(client_socket_dup,str,10));
1143
#endif
1144
1145
                    break;
                case 'I':   /* UART IRQ Line */
1146
                    strcat(cmd,ultoa(cfg.com_irq,str,10));
1147
1148
1149
1150
1151
1152
1153
1154
                    break;
                case 'J':
                    strcat(cmd,cfg.data_dir);
                    break;
                case 'K':
                    strcat(cmd,cfg.ctrl_dir);
                    break;
                case 'L':   /* Lines per message */
1155
                    strcat(cmd,ultoa(cfg.level_linespermsg[useron.level],str,10));
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
                    break;
                case 'M':   /* Minutes (credits) for user */
                    strcat(cmd,ultoa(useron.min,str,10));
                    break;
                case 'N':   /* Node Directory (same as SBBSNODE environment var) */
                    strcat(cmd,cfg.node_dir);
                    break;
                case 'O':   /* SysOp */
                    strcat(cmd,cfg.sys_op);
                    break;
                case 'P':   /* COM Port */
1167
                    strcat(cmd,ultoa(online==ON_LOCAL ? 0:cfg.com_port,str,10));
1168
1169
1170
1171
1172
                    break;
                case 'Q':   /* QWK ID */
                    strcat(cmd,cfg.sys_id);
                    break;
                case 'R':   /* Rows */
1173
                    strcat(cmd,ultoa(rows,str,10));
1174
1175
1176
1177
1178
1179
                    break;
                case 'S':   /* File Spec */
                    strcat(cmd,fspec);
                    break;
                case 'T':   /* Time left in seconds */
                    gettimeleft();
1180
                    strcat(cmd,ultoa(timeleft,str,10));
1181
1182
                    break;
                case 'U':   /* UART I/O Address (in hex) */
1183
                    strcat(cmd,ultoa(cfg.com_base,str,16));
1184
1185
1186
1187
1188
1189
                    break;
                case 'V':   /* Synchronet Version */
                    sprintf(str,"%s%c",VERSION,REVISION);
                    break;
                case 'W':   /* Time-slice API type (mswtype) */
#if 0 //ndef __FLAT__
1190
                    strcat(cmd,ultoa(mswtyp,str,10));
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
#endif
                    break;
                case 'X':
                    strcat(cmd,cfg.shell[useron.shell]->code);
                    break;
                case '&':   /* Address of msr */
                    sprintf(str,"%lu",&fakeriobp);
                    strcat(cmd,str);
                    break;
                case 'Y':
1201
                    strcat(cmd,comspec);
1202
1203
1204
1205
                    break;
                case 'Z':
                    strcat(cmd,cfg.text_dir);
                    break;
1206
1207
				case '~':	/* DOS-compatible (8.3) filename */
#ifdef _WIN32
1208
					char sfpath[MAX_PATH+1];
1209
1210
1211
1212
1213
1214
1215
					strcpy(sfpath,fpath);
					GetShortPathName(fpath,sfpath,sizeof(sfpath));
					strcat(cmd,sfpath);
#else
                    strcat(cmd,fpath);
#endif			
					break;
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
                case '!':   /* EXEC Directory */
                    strcat(cmd,cfg.exec_dir);
                    break;
                case '#':   /* Node number (same as SBBSNNUM environment var) */
                    sprintf(str,"%d",cfg.node_num);
                    strcat(cmd,str);
                    break;
                case '*':
                    sprintf(str,"%03d",cfg.node_num);
                    strcat(cmd,str);
                    break;
                case '$':   /* Credits */
                    strcat(cmd,ultoa(useron.cdt+useron.freecdt,str,10));
                    break;
                case '%':   /* %% for percent sign */
                    strcat(cmd,"%");
                    break;
1233
1234
1235
1236
				case '?':	/* Platform */
#ifdef __OS2__
					strcpy(str,"OS2");
#else
1237
					strcpy(str,PLATFORM_DESC);
1238
1239
1240
1241
#endif
					strlwr(str);
					strcat(cmd,str);
					break;
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
                default:    /* unknown specification */
                    if(isdigit(instr[i])) {
                        sprintf(str,"%0*d",instr[i]&0xf,useron.number);
                        strcat(cmd,str); }
                    break; }
            j=strlen(cmd); }
        else
            cmd[j++]=instr[i]; }
    cmd[j]=0;

    return(cmd);
}