Re: reset/terminate problems; preventing multiple XWin instances

["Ehud Karni" <ehud@unix.mvs.co.il>]

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On Wed, 03 Mar 2004 23:57:22 +0200, cygwinx2eran@tromer.org wrote:
>
> On 29-02-2004 14:11, Takuma Murakami wrote:
>
>  >> As for preventing multiple instances of XWin
>  > This feature is already implemented in my local tree (not
>  > port based but mutex based detection).
>
> I see that it's in 4.3.0-50 and working well, but I don't see how the
> current implementation addresses the common task I mentioned:
>    "open an xterm; run XWin first if needed"
> If I use a batchfile that always runs XWin and then xterm, from the 2nd
> invocation onwards it will produce the error popup reporting a "Fatal
> error" and directing me a to log file... Not quite what's needed here.[1]

I have a similar problem on Linux (I use VNC virtual DISPLAY).
My solution is to use a shell script and check for the open port by
trying to connect to it. If this fails 5 times, I assume it is not
existing and do whats needed (I do check from remote computers too,
so "whats needed" varies). If the connection succeeds the application
is run with this DISPLAY. I wrote a small program that does the connect
with timeout, and a simple bash script that ensures killing the test
program if it hangs (which sometimes occurs).

Ehud.


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