[1.7] fifo regression
Christopher Faylor
cgf-use-the-mailinglist-please@cygwin.com
Sun Jul 26 01:10:00 GMT 2009
On Mon, Jul 20, 2009 at 10:27:18AM -0400, Christopher Faylor wrote:
>On Mon, Jul 20, 2009 at 01:57:59PM +0200, Corinna Vinschen wrote:
>>On Jul 19 19:35, Christopher Faylor wrote:
>>> On Tue, Jul 07, 2009 at 02:02:12PM -0400, Christopher Faylor wrote:
>>> >On Mon, Jul 06, 2009 at 10:18:39PM -0400, Christopher Faylor wrote:
>>> >>On Mon, Jul 06, 2009 at 07:03:11AM -0600, Eric Blake wrote:
>>> >>>But on cygwin 1.7, when you attempt to create multiple writers to a single
>>> >>>fifo, the second writer creates an fd just fine but then fails on any
>>> >>>attempt to write to that fd:
>>> >>
>>> >>I see the problem but I don't know how to fix it yet. It may be a
>>> >>couple of days before I can come up with a solution.
>>> >
>>> >Just an update: I now have a headache. Thanks again Microsoft for
>>> >making it all so complicated. This is YA example of a feature (Windows
>>> >Named Pipes) which behave 98% of the way you'd expect it to work. The
>>> >2% is the killer.
>>>
>>> Just an update: @#$%^&*(!
>>
>>This sounds promising.
>
>I did get Eric's test case working last night with only an addition of
>one or two hundred lines of extra code. I ended up fixing a
>long-standing bug in fhandler_base::read, and found a strange problem
>where fd's are inexplicably changed to textmode. I haven't tracked that
>one down yet.
>
>Then, as I was drifting off to sleep, I realized that my fix only goes
>75% of the way towards getting full fifo behavior. So, I probably still
>won't be checking anything in anytime soon.
I've checked this in but I'm not done yet. I was hoping to implement this
fully but I probably won't have a chance for at least a week.
cgf
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