From:	cgf AT cygnus DOT com (Christopher Faylor)
Subject:	RE: error when maxing out processes
5 Jun 1998 06:07:25 -0700 :
Message-ID:	<199806051254.IAA20679.cygnus.cygwin32.developers@kramden.cygnus.com>
To:	sos AT prospect DOT com DOT ru
Cc:	cygwin32-developers AT cygnus DOT com

>Geoffrey Noer wrote:
>> On Thu, Jun 04, 1998 at 10:08:27AM +0400, Sergey Okhapkin wrote:
>> [...]
>> > It's not possible to wait more than 63 childs, because of
>> > WaitForMultipleObjects() call limitation (the maximum number of handles 
>to
>> > wait is 64). I think fork() call should fail when nchildren >= 63. 
>Also,
>> > sysconf(_SC_CHILD_MAX) should return 63.
>>
>> Hmmm...  _SC_CHILD_MAX is "the number of simultaneous processes per
>> read user ID."  Isn't it more than we don't a parent process to have
>> more than 63 children?
>>
>
>I'll look into PCTS sources - it checks some value and reports an error 
>when is able to fork more than this number of processes on cygwin :-) 
>Probably, it checks _POSIX_CHILD_MAX defined in <limits.h>.

I will make some changes to fork/spawn to return errors and set errno
when the process limit is reached.  If someone can tell me what constant
I should be using/reporting I'll fix that too.

cgf

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