Mailing-List:	contact cygwin-help AT cygwin DOT com; run by ezmlm
List-Subscribe:	<mailto:cygwin-subscribe AT cygwin DOT com>
List-Archive:	<http://sources.redhat.com/ml/cygwin/>
List-Post:	<mailto:cygwin AT cygwin DOT com>
List-Help:	<mailto:cygwin-help AT cygwin DOT com>, <http://sources.redhat.com/ml/#faqs>
Sender:	cygwin-owner AT cygwin DOT com
Mail-Followup-To:	cygwin AT cygwin DOT com
Delivered-To:	mailing list cygwin AT cygwin DOT com
Message-ID:	<4062B0AA.1000505@hhschmidt.de>
Date:	Thu, 25 Mar 2004 11:12:58 +0100
From:	"H. Henning Schmidt" <henning AT hhschmidt DOT de>
User-Agent:	Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.0.1) Gecko/20020823 Netscape/7.0
MIME-Version:	1.0
To:	cygwin AT cygwin DOT com
Subject:	"test -c com1" hangs on some WinXP systems
X-Provags-ID:	kundenserver.de abuse AT kundenserver DOT de auth:e9b0f294f4b6d6da7efd4652948020da

A question slightly besides your point ... but very interesting to me:

What is the benefit of using /dev/ttyS0 instead of "com1" on Cygwin?
Do you have a short explanation for me, or perhaps a pointer to some
more detailed info?

Thanks a lot,
;Henning

On Wed, 24 Mar 2004, Curt, WE7U wrote:

> Our application runs on multiple OS'es.  A few of our WinXP users
> (and perhaps Win2k, can't remember) have had "if test -c com1" hang
> during our configure stage.
>
> We've already figured out that we should be using "/dev/ttyS0"
> instead of "com1", and have switched to that.  Because of the hang
> we're trying "if test -d /proc/registry as the test".  If
> /proc/registry is found, we skip the file test for the serial device
> on Cygwin boxes, thereby avoiding the hang.
>
> Excerpt (the version that hangs sometimes):
>
>
>   AC_DEFUN([XASTIR_DETECT_DEVICES],
>   [
>   AC_MSG_CHECKING([for devices])
>   if test -c com1 ; then
>   ac_tnc_port=com1
>   ac_gps_port=com2
>   elif test -c /dev/cuaa0 ; then
>   ac_tnc_port=/dev/cuaa0
>   ac_gps_port=/dev/cuaa1
>
>
> New improved version:
>
>
>   AC_DEFUN([XASTIR_DETECT_DEVICES],
>   [
>   AC_MSG_CHECKING([for devices])
>   if test -d /proc/registry ; then
>   ac_tnc_port=/dev/ttyS0
>   ac_gps_port=/dev/ttyS1
>   elif test -c /dev/cuaa0 ; then
>   ac_tnc_port=/dev/cuaa0
>   ac_gps_port=/dev/cuaa1
>
>
> Should "if test -c com1" or "if test -c /dev/ttyS0" work on Cygwin
> across all Windows platforms it supports?
>
> We'd rather do "if test -c /dev/ttyS0" if possible, so that it's
> similar across all platforms we support.


-- 
H. Henning Schmidt
email: henning AT hhschmidt DOT de
phone: +49 (0) 6155 / 899 283
fax:   +49 (0) 6155 / 899 284



--
Unsubscribe info:      http://cygwin.com/ml/#unsubscribe-simple
Problem reports:       http://cygwin.com/problems.html
Documentation:         http://cygwin.com/docs.html
FAQ:                   http://cygwin.com/faq/

- Raw text -