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

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#define XTRN_IO_BUF_LEN 5000
/*****************************************************************************/
/* 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 */
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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);
}
/*****************************************************************************/
// Escapes Telnet IAC (255) by doubling the IAC char
/*****************************************************************************/
BYTE* telnet_expand(BYTE* inbuf, ulong inlen, BYTE* outbuf, ulong& newlen)
{
BYTE* first_iac;
ulong i,outlen;
first_iac=(BYTE*)memchr(inbuf, TELNET_IAC, inlen);
if(first_iac==NULL) { /* Nothing to expand */
newlen=inlen;
return(inbuf);
}
outlen=first_iac-inbuf;
memcpy(outbuf, inbuf, outlen);
for(i=outlen;i<inlen;i++) {
if(inbuf[i]==TELNET_IAC)
outbuf[outlen++]=inbuf[i];
}
newlen=outlen;
return(outbuf);
}
#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
#ifdef _WIN32
#include "execvxd.h" /* Win9X FOSSIL VxD API */
extern SOCKET node_socket[];
// -------------------------------------------------------------------------
// 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.
//
typedef HANDLE (WINAPI *OPENVXDHANDLE)(HANDLE);
OPENVXDHANDLE GetAddressOfOpenVxDHandle(void)
return((OPENVXDHANDLE)GetProcAddress(hK32, "OpenVxDHandle"));
/*****************************************************************************/
// 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);
}
/* 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)
/****************************************************************************/
/* 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];
BYTE output_buf[XTRN_IO_BUF_LEN*2];
BYTE wwiv_buf[XTRN_IO_BUF_LEN*2];
bool wwiv_flag=false;

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bool native=false; // DOS program by default
bool nt=false; // WinNT/2K?

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bool rio_abortable_save;
bool use_pipes=false; // NT-compatible console redirection

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uint i;
time_t hungup=0;
HANDLE vxd=INVALID_HANDLE_VALUE;
HANDLE rdslot=INVALID_HANDLE_VALUE;
HANDLE wrslot=INVALID_HANDLE_VALUE;
HANDLE start_event=NULL;
HANDLE rdoutpipe;
HANDLE wrinpipe;
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;
OPENVXDHANDLE OpenVxDHandle;
if(online==ON_LOCAL)
eprintf("Executing external: %s",cmdline);
XTRN_LOADABLE_MODULE;
XTRN_LOADABLE_JS_MODULE;
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(mode&EX_SH || strcspn(cmdline,"<>|")!=strlen(cmdline))
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=localtime(&now);

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if((retval=WaitForSingleObject(exec_mutex,5000))!=WAIT_OBJECT_0) {
errormsg(WHERE, ERR_TIMEOUT, "exec_mutex", retval);
return(GetLastError());
}
OpenVxDHandle=GetAddressOfOpenVxDHandle();
if(OpenVxDHandle==NULL)
nt=true; // Windows NT/2000
if(native && mode&EX_OUTR && !(mode&EX_OFFLINE))
use_pipes=true;
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);
sprintf(sbbsctrl,"SBBSCTRL=%s",cfg.ctrl_dir);
putenv(dszlog); /* Makes the DSZ LOG active */
putenv(sbbsnode);
putenv(sbbsnnum);
putenv(sbbsctrl);
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);
putenv(env_day);
putenv(env_weekday);
putenv(env_monthname);
putenv(env_month);
if(putenv(env_year))
errormsg(WHERE,ERR_WRITE,"environment",0);
} 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;
errormsg(WHERE, ERR_CREATE, str, 0);
}
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);
if(tm_p!=NULL) { /* date/time env vars */

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fprintf(fp, "DAY=%02u\n", tm_p->tm_mday);
fprintf(fp, "WEEKDAY=%s\n",wday[tm_p->tm_wday]);
fprintf(fp, "MONTHNAME=%s\n",mon[tm_p->tm_mon]);

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fprintf(fp, "MONTH=%02u\n",tm_p->tm_mon+1);
fprintf(fp, "YEAR=%u\n",1900+tm_p->tm_year);
}
fclose(fp);
sprintf(fullcmdline, "%sDOSXTRN.EXE %s", cfg.exec_dir, str);
if(!(mode&EX_OFFLINE) && nt) { // Windows NT/2000
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);
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) {
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) {
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) {
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) {
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);
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
)) {
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;
}
if(startup->options&BBS_OPT_XTRN_MINIMIZED) {
startup_info.wShowWindow=SW_SHOWMINNOACTIVE;
startup_info.dwFlags|=STARTF_USESHOWWINDOW;
}
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());
}
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;
}
if(native && !(mode&EX_OFFLINE)) {
FILE* fp;
sprintf(fname,"%sDOOR32.SYS",cfg.node_dir);
fp=fopen(fname,"wb");
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"
,mode&EX_OUTR ? 0 /* Local */ : 2 /* Telnet */
,mode&EX_OUTR ? INVALID_SOCKET : client_socket_dup
,VERSION_NOTICE,REVISION
,useron.number
,useron.name
,useron.alias
,useron.level
,timeleft/60
,useron.misc&ANSI ? 1 : 0
,cfg.node_num);
fclose(fp);
/* not temporary */
if(!(mode&EX_INR))
pthread_mutex_lock(&input_thread_mutex);
}
if(!CreateProcess(
NULL, // pointer to name of executable module
fullcmdline, // pointer to command line string
NULL, // process security attributes
NULL, // thread security attributes
native && !(mode&EX_OFFLINE), // handle inheritance flag
CREATE_NEW_CONSOLE/*|CREATE_SEPARATE_WOW_VDM*/, // creation flags
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
)) {
if(native && !(mode&EX_OFFLINE))
pthread_mutex_unlock(&input_thread_mutex);
SetLastError(last_error); /* Restore LastError */
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
CloseHandle(process_info.hThread);
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) {
TerminateProcess(process_info.hProcess, __LINE__);
CloseHandle(process_info.hProcess);
errormsg(WHERE, ERR_TIMEOUT, "start_event", retval);
return(GetLastError());
}
CloseHandle(start_event);
start_event=NULL; /* Mark as closed */
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
)) {
TerminateProcess(process_info.hProcess, __LINE__);
CloseHandle(process_info.hProcess);
errormsg(WHERE, ERR_IOCTL, SBBSEXEC_VXD, SBBSEXEC_IOCTL_COMPLETE);
return(GetLastError());
}
}
}

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ReleaseMutex(exec_mutex);
/* 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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while(!(mode&EX_BG)) {
if(mode&EX_CHKTIME)
gettimeleft();
if(!online && !(mode&EX_OFFLINE)) { // Tell VXD/VDD and external that user hung-up
if(was_online) {
sprintf(str,"%s hung-up in external program",useron.alias);
logline("X!",str);
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);
}
if((native && !use_pipes) || mode&EX_OFFLINE) {
/* Monitor for process termination only */
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 {
if(nt || use_pipes) { // Windows NT/2000
/* Write to VDD */
wr=RingBufPeek(&inbuf,buf,sizeof(buf));
if(wr) {
if(!use_pipes && wrslot==INVALID_HANDLE_VALUE) {
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
}
/* CR expansion */
if(use_pipes)
bp=cr_expand(buf,wr,output_buf,wr);
else
bp=buf;
if(wrslot!=INVALID_HANDLE_VALUE
&& WriteFile(wrslot,bp,wr,&len,NULL)==TRUE) {
RingBufRead(&inbuf, NULL, len);
wr=len;
if(use_pipes) {
/* echo */
RingBufWrite(&outbuf, bp, wr);
sem_post(&output_sem);
}
} else // VDD not loaded yet
wr=0;
}
/* Read from VDD */
len=sizeof(buf);
avail=RingBufFree(&outbuf);
if(avail==0)
lprintf("Node %d !output buffer full (%u bytes)"
,cfg.node_num,RingBufFull(&outbuf));
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
&& ReadFile(rdslot,buf,len,&rd,NULL)==TRUE && rd>0) {
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 {
bp=telnet_expand(buf, rd, telnet_buf, rd);
if(rd>sizeof(telnet_buf))
errorlog("TELNET_BUF OVERRUN");
}
RingBufWrite(&outbuf, bp, rd);
sem_post(&output_sem);
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738
739
740
741
742
743
744
745
746
747
748
}
} 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);
if(avail==0)
lprintf("Node %d !output buffer full (%u bytes)"
,cfg.node_num,RingBufFull(&outbuf));
if(avail>=RingBufFull(&outbuf)) {
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
bp=telnet_expand(buf, rd, telnet_buf, rd);
RingBufWrite(&outbuf, bp, rd);
sem_post(&output_sem);
}
}
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;
}

rswindell
committed

rswindell
committed
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
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
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);
}
}
if(!(mode&EX_BG)) { /* !background execution */
if(retval==STILL_ACTIVE)
TerminateProcess(process_info.hProcess, GetLastError());
sprintf(str,"%sDOSXTRN.RET", cfg.node_dir);
FILE* fp=fopen(str,"r");
if(fp!=NULL) {
fscanf(fp,"%d",&retval);
fclose(fp);
}
}
CloseHandle(process_info.hProcess);
if(!(mode&EX_OFFLINE)) { /* !off-line execution */
if(native)
pthread_mutex_unlock(&input_thread_mutex);

rswindell
committed
curatr=0; // Can't guarantee current attributes

rswindell
committed
rio_abortable=rio_abortable_save; // Restore abortable state

rswindell
committed
/* 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;
}
// lprintf("%s returned %d",realcmdline, retval);
errorlevel = retval; // Baja-retrievable error value

rswindell
committed
/*****************************************************************************/
// 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);
}
#define MAX_ARGS 1000
int sbbs_t::external(char* cmdline, long mode, char* startup_dir)
{
char* argv[MAX_ARGS];

rswindell
committed
BYTE* bp;
BYTE buf[XTRN_IO_BUF_LEN];
BYTE output_buf[XTRN_IO_BUF_LEN*2];
ulong avail;

rswindell
committed
ulong output_len;
bool native=false; // DOS program by default

rswindell
committed
int rd;
int wr;

rswindell
committed
int argc;

rswindell
committed
int in_pipe[2];
int out_pipe[2];
XTRN_LOADABLE_MODULE;
XTRN_LOADABLE_JS_MODULE;
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) {
bprintf("\r\nExternal DOS programs are not yet supported in\r\n%s\r\n",VERSION_NOTICE);
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);
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);
} else {
/* setup DOSemu env here */
}

rswindell
committed
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);
}
pthread_mutex_unlock(&input_thread_mutex);
errormsg(WHERE,ERR_EXEC,cmdline,0);

rswindell
committed
if(pid==0) { /* child process */
if(startup_dir!=NULL && startup_dir[0])
chdir(startup_dir);
lprintf("Node %d executing external: %s",cfg.node_num,cmdline);
if(mode&EX_SH || strcspn(cmdline,"<>|;")!=strlen(cmdline)) {
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;
for(i=0;cmdline[i] && argc<MAX_ARGS;i++) /* Break up command line */
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;
}

rswindell
committed
if(mode&EX_INR) {
close(in_pipe[1]); /* close write-end of pipe */