Mail Archives: cygwin/2009/04/02/17:04:57
Corinna Vinschen wrote:
> On Apr 2 16:21, Daniel Pocock wrote:
>
>> Corinna Vinschen wrote:
>>
>>> Did you try?
>>>
>>>
>> I have now had a chance to try it under cygrunsrv from Cygwin 1.5.25 and 1.7
>>
>> Under 1.5.25, it doesn't work because of the sockets issue
>>
>> Under 1.7, a new issue is revealed: execve doesn't maintain the same
>> process ID, so cygrunsrv thinks the service has actually stopped, and
>> the cygrunsrv process exits. This is obviously quite bad.
>>
>
> Huh? The *Windows* PID is not the same after an exec, but the
> Cygwin PID is maintained after an exec. Try this:
>
>
cygrunsrv definitely stays running when I start gmond. It stops
immediately after the execve call - it thinks the process has stopped,
but in fact a new gmond is running with a new Windows PID. I am using
the -x option to cygrunsrv and the -f (foreground) and -p (pidfile)
options to gmond. Which PID does cygrunsrv look for?
> #include <stdio.h>
> #include <unistd.h>
> #include <sys/types.h>
> #include <sys/wait.h>
> #include <windows.h>
>
> int main(int argc, char **argv)
> {
> int status;
>
> if (argc > 1)
> {
> printf ("Execed Child: Cygwin: %d Windows: %lu\n",
> getpid (), GetCurrentProcessId ());
> return 0;
> }
> printf ("Parent: Cygwin: %d Windows: %lu\n",
> getpid (), GetCurrentProcessId ());
> switch (fork ())
> {
> case 0:
> printf ("Forked Child: Cygwin: %d Windows: %lu\n",
> getpid (), GetCurrentProcessId ());
> execl ("./x", "x", "child", NULL);
> break;
> default:
> break;
> }
> wait (&status);
> return 0;
> }
>
>
>
> Corinna
>
>
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