Re: MC no longer working with cygwin 3.1.x

[Ken Brown <kbrown@cornell.edu>]

On 12/21/2019 2:26 PM, Corinna Vinschen wrote:
> Hi Ken,
> 
> On Dec 21 15:48, Ken Brown wrote:
>> [Moving from cygwin to cygwin-developers.]
>>
>> Hi Corinna,
>>
>> On 12/19/2019 4:24 AM, Corinna Vinschen wrote:
>>> Ken, btw., we should add a PIPE_REJECT_REMOTE_CLIENTS flag, just for
>>> paranoia.
>>
>> Should this be FILE_PIPE_REJECT_REMOTE_CLIENTS?  It seems that most of the flags
>> for NtCreateNamedPipeFile start with "FILE_".
> 
> Right, it's FILE_PIPE_REJECT_REMOTE_CLIENTS, sorry about that.
> 
>> And which argument of NtCreateNamedPipeFile should that flag be in?  None of
>> them seem quite right to me.  Or is there some other function that should be
>> called after NtCreateNamedPipeFile to set that flag?
> 
> AFAICS it's a flag added to the message type, i.e.
> 
>    FILE_PIPE_MESSAGE_TYPE | FILE_PIPE_REJECT_REMOTE_CLIENTS

OK, I'll give that a try.  I wouldn't have guessed that from the documentation, 
which suggests that the pipe type argument is BOOLEAN and is supposed to be 
FILE_PIPE_MESSAGE_TYPE == 1 or FILE_PIPE_BYTE_STREAM_MODE == 0.  On the other 
hand, the defines in /usr/include/w32api/ddk/ntifs.h show that

FILE_PIPE_TYPE_VALID_MASK == FILE_PIPE_MESSAGE_TYPE | 
FILE_PIPE_REJECT_REMOTE_CLIENTS,

which is consistent with what you said.

>> Last question: The only documentation I found for NtCreateNamedPipeFile is here:
>>   
>> http://undocumented.ntinternals.net/index.html?page=UserMode%2FUndocumented%20Functions%2FNT%20Objects%2FFile%2FNtCreateFile.html
>>
>> Is there anything better?
> 
> Not that I'm aware of.   There's only this and the Reactos source.

Thanks, I didn't know about Reactos.

Ken