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Re: "test -c com1" hangs on some WinXP systems
- From: "Curt, WE7U" <archer at eskimo dot com>
- To: cygwin at cygwin dot com
- Date: Wed, 24 Mar 2004 13:31:50 -0800 (PST)
- Subject: Re: "test -c com1" hangs on some WinXP systems
- References: <Pine.SUN.4.58.0403241253000.26969@eskimo.com>
- Reply-to: "Curt Mills, WE7U" <archer at eskimo dot com>
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
--
Curt, WE7U archer at eskimo dot com
Arlington, WA, USA http://www.eskimo.com/~archer
"Lotto: A tax on people who are bad at math." -- unknown
"Windows: Microsoft's tax on computer illiterates." -- WE7U
"The world DOES revolve around me: I picked the coordinate system!"
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