xtrn.cpp

/* 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 2009 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"

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

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

	#define TTYDEFCHARS		// needed for ttydefchars definition

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

	#ifdef NEEDS_FORKPTY
	#include <grp.h>
	#endif

	#include <termios.h>

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

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

#endif	/* __unix__ */

#define XTRN_IO_BUF_LEN 10000	/* 50% of IO_THREAD_BUF_SIZE */

/*****************************************************************************/
/* 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++) {
        if(buf[i]==CTRL_C) {	/* WWIV color escape char */
            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':