🚀 go-pugleaf

In article <1dbal6INNlkt@iraul1.ira.uka.de> voss@i40s16.ira.uka.de (Stefan Voss) writes:
>Hi C experts,
>
>But, one error vanished and another has arised.
>The code that deals with the operating system (originally Unix, now GNO)
>uses a lot of IOCTL-stuff. Especially, there is a line
>
>if (gtty(0, &savetty) == -1) { ... }; \* savetty being a struct sgttyb *\
>
>with gtty as usual defined as : 
>#define gtty(fd, arg)    (ioctl(fd, TIOCGETP, arg))
>

Okay, UNIX uses 0 (stdin), 1 (stdout), 2 (stderr), but GNO uses 1 (stdin),
2 (stdout), 3 (stderr).  So, basically, when dealing with the console or
any TTY, remember this simple rule and you will be set.  So, above, change
the getty(0, &savetty) call to getty(1, &savetty) and it should then work.

>The call to gtty returns -1 (i.e. an error) with the variable 
>errno set to 20 (ENOTTY).
>Conclusion: The current controlling terminal (GNO Console driver) isn't
>a tty (whatever that is).
>
>Can I make the GNO Console driver a tty ? (Perhaps, setting a variable ?)
>Or do I have to modify/throw out the source code ?
>
>Hope, somebody can help.

And I just did :)

>     Stefan Voss       (voss@ira.uka.de)

Mike