I can successfully replicate Raul's experiment, except that from the
cygwin prompt, I need to say
/cygdrive/c/j601/j
to invoke J. The filename remapping done by cygwin is a generic source of
problems in mixed-mode programming.
Is the problem that Bill's external program terminates? If so, the window
flashes 0 and goes away. The output can be redirected to a file, which
can be displayed.
Best wishes,
John
Miller, Raul D wrote:
> Bill Harris wrote:
>> I'm trying to execute an external program compiled under cygwin from J.
>>
>> I tried forms such as
>>
>> wd'winexec "c:\cygwin\home\Bill Harris\myprogram.exe c:\cygwin\howe\Bill
>> Harris\mydata.txt" sw_shownormal'
>>
>> That flashes a new window on the screen temporarily and returns a 0, and
> ...
>> Is there a way to accomplish what I'm trying to do?
>
> Is cygwin's bin directory in your path?
>
> Here's a quick test I did, from a cygwin shell (hand copied
> because that machine is not networked, but hopefully I've
> not introduced any horrible mistakes). ($ represents the
> cygwin prompt, ^D represents control-D.)
>
> $ cd /tmp
> $ cat >abcd.c
> #include <stdio.h>
> main(){printf("Hello\n");
> getchar();}
> ^D
> $ make abcd
> $ ./abcd
> Hello
>
> $ c:/j601/j
>
> Now I have a cygwin program that displays something
> and waits for me to hit Enter before it exits. And,
> I have a J session with cygwin's bin directory in its
> path. In that session I type:
>
> wd 'winexec c:\cygwin\tmp\abcd.exe'
>
> This pops up a new window, which displays some text and
> is waiting for me to hit enter. Meanwhile, wd has returned 0.
> If I mis-spell the executable name, wd would instead give me
> a domain error.
>
> Seems to work for me...
>
> --
> Raul
> ----------------------------------------------------------------------
> For information about J forums see http://www.jsoftware.com/forums.htm
>
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