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From: todd@stiatl.UUCP (Todd Merriman)
Newsgroups: comp.sys.ibm.pc
Subject: Re: Detecting ANSI.SYS
Message-ID: <4009@stiatl.UUCP>
Date: 2 Apr 89 13:44:19 GMT
References: <1920@dataio.Data-IO.COM>
Reply-To: todd@stiatl.UUCP (Todd Merriman)
Organization: Sales Technologies Inc., Atlanta, GA
Lines: 78

In article <1920@dataio.Data-IO.COM> bright@Data-IO.COM (Walter Bright) writes:
>I'm looking for a reliable and portable way of determining if ANSI.SYS or
>an equivalent driver (NANSI.SYS, FANSI.SYS, ANSI.COM, etc) is loaded.


This can be achieved by transmitting the "cursor position report"
escape sequence and waiting to see if anything comes back as in the 
following:

#ifdef DOCUMENTATION
 /*****************************************************************************
.MODULE           isansi
.LIBRARY          clib
.TYPE             function
.APPLICATION      screen
.SYSTEM           msdos
.SYSTEM           vms
.AUTHOR           Todd Merriman
.LANGUAGE         C
.DESCRIPTION
   Check for presence of ANSI terminal
.ARGUMENTS
   boolean isansi()
.NARRATIVE
   Isansi sends the report cursor escape sequence to the console.  If nothing
   is transmitted back, the function returns 0.
.RETURNS
   TRUE if an ANSI terminal is attached, FALSE otherwise.
.ENDOC            END DOCUMENTATION
 *****************************************************************************/
#endif   /* DOCUMENTATION */

#include <stdio.h>
#include "csub.h"

/****************************************************************************
   Isansi
*****************************************************************************/
boolean isansi()
{

   conflush();          /* flush type-ahead */
   cputs("\x1B[6n");    /* report cursor position command */
   delay(50);           /* delay 50 milliseconds */
   if (!kbhit())        /* key-pressed? */
   {
      conflush();
      return 0;         /* no cursor position came back */
   }
   conflush();
   return 1;
}

#ifdef TESTING             /* test program */

/*****************************************************************************
   Main entry
*****************************************************************************/
main (argc,argv)
   int argc;
   char *argv[];
{
   puts("ANSI terminal attached?");
   puts(isansi()?("YES"):("NO"));
   puts("> End <");

   exit(EXITNORMAL);
}  /* end of main */

#endif   /* TESTING */

/*****************************************************************************
   End
*****************************************************************************/

   ...!gatech!stiatl!todd
   Todd Merriman * 404-377-TOFU * Atlanta, GA
   Note:  I have no idea what my employer's views on the subject are.