Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!zaphod.mps.ohio-state.edu!usc!apple!tahoe!equinox!jra
From: jra@equinox.unr.edu (John Anderson)
Newsgroups: comp.lang.perl
Subject: ioctl() error msg
Message-ID: <6279@tahoe.unr.edu>
Date: 15 May 91 21:08:48 GMT
Sender: news@tahoe.unr.edu
Lines: 31

i'm a perl rookie... i've been reading the nutshell book, etc. and am
attempting some ioctl() stuff and am getting a generic error msg.
perhaps someone could give me a pointer to more info.

here's the chunk in question:
--
#
# $r_tty is set to "+</dev/tty1"
#
open(TTY_IN, $r_tty) || die "Can't open $r_tty ($!)";

require 'sys/termio.ph';   # h2ph'ed
require 'sys/ioctl.ph';
$termio_t = "SSSSccccccccc"; # template of struct termio <sys/termio.h>

$foo = ioctl(TTY_IN, &TCGETA, $termio) || die "Can't get termio values: $!";
--
error msg:
Return value overflowed string at hang line 31.

i'm wondering if $foo is getting overflowed or $termio?!
line 31 is the ioctl line... i've tried tweaking here and there
(hard-coding the device in open(), etc.) to no avail, am reading the
passages that ioctl() is system dependent etc. the system that i'm
running this on is an IBM rs6000 (aix3.1 - no updates), perl4.003. 
any help would be appreciated.

thanks.
jra@equinox.unr.edu
John Anderson
University of Nevada-Reno