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From: vdburg@utrtsc.dec.com (Jur van der Burg)
Newsgroups: comp.sources.d,comp.sources.wanted,comp.unix.ultrix
Subject: Re: getty replacement wanted for Ultrx/BSD4.x
Message-ID: <16338@shlump.nac.dec.com>
Date: 15 Oct 90 15:01:04 GMT
Sender: newsdaemon@shlump.nac.dec.com
Followup-To: comp.sources.d
Organization: Digital Equipment Corporation
Lines: 205


In article <195@ncmicro.lonestar.org>, ltf@ncmicro.lonestar.org (Lance Franklin) writes...
>Let's try this again...never got any response to earlier requests.
> 
>I'm looking for sources for getty (or a getty replacement) that will
>allow a better interface to hayes-style modems that can notify the
>computer of the baud-rate of the caller.  Yes, I know that the present
.....


This hack may do what you want. I use this on a microvax 2000 with
a quattro modem, Ultrix is V3.1. (Unsupported, etc...)

Jur.

/*
 *	aa.c (AutoAnswer)	
 *
 *	for dc hayes smart modem.
 *	Listens for a modem reponse, sets the badurate accordingly,
 *	turns off verbose mode and speaker(always off) and turns on
 *	extended result codes.  exec()'s '/etc/getty' on exit.
 *
 * Use the following in /etc/gettytab:
 *
 * #
 * # Setup terminal with full 8-bit support for dialin connections
 * #
 * M8bit.300|300-baud-8bit-modem:\
 * 	:sp#300:p8:f0#01000000000:to#20:
 * M8bit.1200|1200-baud-8bit-modem:\
 * 	:sp#1200:p8:f0#01000000000:to#20:
 * M8bit.2400|2400-baud-8bit-modem:\
 * 	:sp#2400:p8:f0#01000000000:to#20:
 *
 * And the following in /etc/ttys:
 *
 * tty02 "/etc/aa M8bit.2400" dialup	on modem	# modem port
 * 
 *	Jur van der Burg - 14 apr 1990
 */

#include <ctype.h>
#include <stdio.h>
#include <sys/ioctl.h>
#include <sys/file.h>
#include <sys/types.h>
#include <time.h>
#include <errno.h>

#define  LOGFILE    "/usr/adm/aa_log"

FILE *logfp;
int modem_fp;
char *gettim(),
     *make_result();

main(argc,argv)
int argc;
char *argv[];
{
   char devname[20];

   sprintf(devname,"/dev/%s",argv[2]);  /* assemble modem line name */
   sleep(1);               /* give modem time to hang up from previous call */
   modem_fp = open(devname,O_RDWR|O_NDELAY,0); /* open line without wait */
   ioctl(modem_fp,TIOCNMODEM,(int *)1); /* ignore modem signals */
   logfp = fopen(LOGFILE,"a");          /* open the log file */
   setbuf(logfp,0);                     /* make sure we can see contents */
   init_modem();                        /* prepare the modem */
   for(;;)                              /* do this until valid response */
      switch(get_result())              /* get the response */
      {
		 case 1:
		connect("300",argv);
		break;
         case 5:
		connect("1200",argv);
		break;
         case 10:
		connect("2400",argv);
		break;
         default:
                break;
      }
}

init_modem()
{
   struct sgttyb ttybuf;

   ioctl(modem_fp,TIOCGETP,&ttybuf);
   ttybuf.sg_ispeed = ttybuf.sg_ospeed = B2400;
   ttybuf.sg_flags |= RAW;
   ttybuf.sg_flags &= ~ECHO;
   ioctl(modem_fp,TIOCSETP,&ttybuf);
   write(modem_fp,"\rATZ\r",5);
   sleep(3);
   write(modem_fp,"AT Q0 V0 M0 X3 E0 S0=1 &D2 &C1 &R1\r",35);
   sleep(1);
   ioctl(modem_fp, TIOCFLUSH, 0);
}

get_result()
{
   int result;
   char tmp;

   result = -1;
   while (result < 0) 
   {
      read(modem_fp,&tmp,1);
      switch(tmp)
      {
         case '1':
                  read(modem_fp,&tmp,1);
                  if (tmp == '\r')
                     result = 1;
                  else if (isdigit(tmp))
                     result = 10 + (tmp - '0');
                  break;
         default:
                  if (isdigit(tmp))
                     result = tmp - '0';
                  break;
      }
   }
   ioctl(modem_fp, TIOCFLUSH, 0);
   fprintf(logfp,"%s> %s\n",gettim(),make_result(result));
   return(result);
}

connect(baudrate,argv)
char *baudrate;
char *argv[];
{
   static char *args[] = {
               "+",            /* getty will accept our open line */
               "M8bit.xxxxx",
               0,
               0 };
   char *envp[1];

   strcpy(&args[1][6],baudrate);
   args[2] = argv[2];
   envp[0] = 0;
   sigsetmask(0);
   fprintf(logfp,"%s> calling getty: %s %s %s\n",gettim(),args[0],args[1],args[2]);
   fclose(logfp);
   ioctl(modem_fp,TIOCMODEM,(int *) 1);	/* set modem type line */
   ioctl(modem_fp,TIOCHPCL,0);		/* set hangup on close */
   dup2(0,1);
   dup2(0,2);
   execve("/etc/getty", args, envp);
   exit(255);
}

char *gettim()
{
   char *ctime();
   time_t tim;
   char *str;

   tim = time((long *)0);
   str = ctime(&tim);
   str[24] = '\0';         /* zap trailing newline */
   return (str);
}

char *make_result(code)
int code;
{
   switch(code)
   {
      case 0:
              return("OK");
      case 1:
              return("CONNECT");
      case 2:
              return("RING");
      case 3:
              return("NO CARRIER");
      case 4:
              return("ERROR");
      case 5:
              return("CONNECT 1200");
      case 6:
              return("NO DIALTONE");
      case 7:
              return("BUSY");
      case 8:
              return("NO ANSWER");
      case 10:
              return("CONNECT 2400");
      default:
              return("UNKNOWN");
   }
}
Jur van der Burg		DEC Easynet:  utrtsc::vdburg
Digital Equipment bv		UUCP:	      {decvax,ucbvax,allegra}!
Utrecht        			Internet:     decwrl!utrtsc.dec.com!vdburg
The Netherlands				      vdburg@utrtsc.dec.com
					      vdburg%utrtsc.dec@decwrl.dec.com

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