Re: Three major questions.

[Stas Sergeev]

Hello.

Boris Reisig wrote:
1) To get rid splash screen "Now type ENTER to start DOSEMU" and 
automatically start dosemu without hitting a key.
"dosemu -quiet" or don't use the dosemu
startup script at all.
3) To be able to turn a comport into a telnet port. This would be 
perfect for BBS software if I could turn the com ports into telnet
ports.
You probably mean a TCP port here.

For example. If I connect to my box on port (for example) 5000,
Dosemu would redirect that as com1, port 5001 would be com2, etc.
Any chance of this?
This might be very easy as dosemu (since
very recently) can use a pseudo-terminals as
a serial ports.
I've just tried one possibility that came to
my mind first
(example of redirecting COM2 to TCP port 5000
as I see it, follows):
1. Wrote a small program "datacopy" (attached).
[Duh, something like that might be somewhere
among the generic Unix utilities, so I am sure
I've reinvented the wheel by writing it. Can
anyone point me the analog of such a prog?]
2. Configured dosemu to use a pseudo-terminal
as a serial port:
$_com2="/dev/ttyp1"
3. Started the TCP port listener that way:
faucet 5000 --in --out datacopy /dev/ptyp1
(note the difference between "ttyp1" in
step 2 and "ptyp1" here)
4. Opened a connection to that port with a
telnet:
telnet localhost 5000
5. Started dosemu.

6. Started the terminal program on COM2 and got
the communication between the DOS terminal prog
and the telnet session to ensure that the port is
redirected successfully.
"faucet" is from a "netpipes" package, but you
can also set up the [x]inetd for that work (but
using faucet is simpler).
I have never used that for anything real so I don't
know how good it suits the real life needs.
If that works for someone here, or if something is
still missing, or if there is a better solution,
please let me know. I think the current documentation
doesn't have a clear solution for that, so it must
be worked out and documented.
#include <stdio.h>
#include <fcntl.h>
#include <unistd.h>
#include <sys/time.h>
#include <sys/types.h>
int main(int argc, char *argv[])
{
   char buf[1600];
   int f,l;
   fd_set fds;
 
   if(argc < 2) {
      printf("Usage: datacopy file_name\n");
      return 1;
   }

   f = open(argv[1], O_RDWR);

   while(1){
        FD_ZERO(&fds);
        FD_SET(STDIN_FILENO, &fds);
        FD_SET(f, &fds);

        select(f + 1, &fds, NULL, NULL, NULL);

        if( FD_ISSET(f, &fds) ) {
           l = read(f,buf,sizeof(buf));
           if (l <= 0)
              break;
           write(STDOUT_FILENO,buf,l);
        }
        if( FD_ISSET(STDIN_FILENO, &fds) ) {
           l = read(STDIN_FILENO,buf,sizeof(buf));
           if (l <= 0)
              break;
           write(f,buf,l);
        }
   }
   return 0;
}