Mailing-List: contact cygwin-help@cygwin.com; run by ezmlm List-Subscribe: List-Archive: List-Post: List-Help: , Sender: cygwin-owner@cygwin.com Mail-Followup-To: cygwin@cygwin.com Delivered-To: mailing list cygwin@cygwin.com Reply-To: Cygwin List Message-Id: <6.0.1.1.0.20040324194546.03cadb00@127.0.0.1> X-Sender: Date: Wed, 24 Mar 2004 19:48:00 -0500 To: "Curt Mills, WE7U" , cygwin@cygwin.com From: Larry Hall Subject: Re: "test -c com1" hangs on some WinXP systems In-Reply-To: References: Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" At 04:31 PM 3/24/2004, you wrote: >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. > >I should have completed more of the function above, as it's possible >that it is one of the other tests that hangs on Cygwin/WinXP. >Unlikely, but possible. I expect it hangs on the first test for >"com1". Tack the following code onto the end of either code example >above: > > > elif test -c /dev/ttyS0 ; then > ac_tnc_port=/dev/ttyS0 > ac_gps_port=/dev/ttyS1 > elif test -c /dev/cua/a ; then > ac_tnc_port=/dev/cua/a > ac_gps_port=/dev/cua/b > else > ac_tnc_port=none > ac_gps_port=none > fi > "com" is a reserved name in Windows. It's best to steer clear of it in any context you can. You may be catching it in your "if test -c com1" version. -- Larry Hall http://www.rfk.com RFK Partners, Inc. (508) 893-9779 - RFK Office 838 Washington Street (508) 893-9889 - FAX Holliston, MA 01746 -- 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/