Redirecting stderr to stdout through pipe doesn't work the way it does in Linux

cyg Simple cygsimple@gmail.com
Thu Dec 6 16:21:00 GMT 2018


On 12/5/2018 5:25 PM, David Karr wrote:
> On Wed, Dec 5, 2018 at 11:44 AM cyg Simple <cygsimple@gmail.com> wrote:
> 
>> On 12/5/2018 1:33 PM, David Karr wrote:
>>> On Wed, Dec 5, 2018 at 9:43 AM cyg Simple <cygsimple@gmail.com> wrote:
>>>
>>>>
>>>> Your query got me interested in looking and I believe that winpty needs
>>>> to be at the front of all the commands so that it can communicate with
>>>> mintty properly.  To overcome the need to remember you could add an
>>>> alias to execute the command; `alias FOO="winpty FOO"'.
>>>>
>>>
>>> Sigh. What a mess. I can't get this to work.  It was easy enough when a
>>> single script has to execute "kubectl", having "winpty" prefix that call,
>>> but I'm trying to write a script that calls that other script, and even
>> in
>>> a pipeline.
>>>
>>> If I have "winpty" prefix the call to the script that calls "kubectl", it
>>> says:
>>>
>>>       winpty: error: cannot start '...': Not found in PATH
>>>
>>> When I changed it so it references the absolute path, it then says "%1 is
>>> not a valid Win32 application. (error 0xc1)".  So, this makes it clear
>> that
>>> winpty can only directly execute Windows applications, which makes sense.
>>>
>>> So how can I call a Windows application from more than just the top-level
>>> script?
>>>
>>
>> What does cygcheck say about your winpty?  You are using the Cygwin
>> compiled version, correct?
>>
> 
> By "say", I assume you mean the output from running "cygcheck winpty"?
> This is what I get:
> 

Yes that is what I meant by my colloquial phrase.

>      Found:
> C:\Users\myuid\frameworks\winpty-0.4.3-cygwin-2.8.0-x64\bin\winpty.exe
>      C:\Users\myuid\frameworks\winpty-0.4.3-cygwin-2.8.0-x64\bin\winpty.exe
>        C:\cygwin64\bin\cygwin1.dll
>          C:\Windows\system32\KERNEL32.dll
>            C:\Windows\system32\API-MS-Win-Core-RtlSupport-L1-1-0.dll
>            C:\Windows\system32\ntdll.dll
>            C:\Windows\system32\KERNELBASE.dll
>            C:\Windows\system32\API-MS-Win-Core-ProcessThreads-L1-1-0.dll
>            C:\Windows\system32\API-MS-Win-Core-Heap-L1-1-0.dll
>            C:\Windows\system32\API-MS-Win-Core-Memory-L1-1-0.dll
>            C:\Windows\system32\API-MS-Win-Core-Handle-L1-1-0.dll
>            C:\Windows\system32\API-MS-Win-Core-Synch-L1-1-0.dll
>            C:\Windows\system32\API-MS-Win-Core-File-L1-1-0.dll
>            C:\Windows\system32\API-MS-Win-Core-IO-L1-1-0.dll
>            C:\Windows\system32\API-MS-Win-Core-ThreadPool-L1-1-0.dll
>            C:\Windows\system32\API-MS-Win-Core-LibraryLoader-L1-1-0.dll
>            C:\Windows\system32\API-MS-Win-Core-NamedPipe-L1-1-0.dll
>            C:\Windows\system32\API-MS-Win-Core-Misc-L1-1-0.dll
>            C:\Windows\system32\API-MS-Win-Core-SysInfo-L1-1-0.dll
>            C:\Windows\system32\API-MS-Win-Core-Localization-L1-1-0.dll
>            C:\Windows\system32\API-MS-Win-Core-ProcessEnvironment-L1-1-0.dll
>            C:\Windows\system32\API-MS-Win-Core-String-L1-1-0.dll
>            C:\Windows\system32\API-MS-Win-Core-Debug-L1-1-0.dll
>            C:\Windows\system32\API-MS-Win-Core-ErrorHandling-L1-1-0.dll
>            C:\Windows\system32\API-MS-Win-Core-Fibers-L1-1-0.dll
>            C:\Windows\system32\API-MS-Win-Core-Util-L1-1-0.dll
>            C:\Windows\system32\API-MS-Win-Core-Profile-L1-1-0.dll
>            C:\Windows\system32\API-MS-Win-Security-Base-L1-1-0.dll
>        C:\Users\myuid\frameworks\winpty-0.4.3-cygwin-2.8.0-x64\bin\winpty.dll
>          C:\Windows\system32\ADVAPI32.dll
>            C:\Windows\system32\msvcrt.dll
>              C:\Windows\system32\API-MS-Win-Core-Console-L1-1-0.dll
>              C:\Windows\system32\API-MS-Win-Core-DateTime-L1-1-0.dll
>            C:\Windows\system32\API-MS-WIN-Service-Core-L1-1-0.dll
>            C:\Windows\system32\API-MS-WIN-Service-winsvc-L1-1-0.dll
>            C:\Windows\system32\API-MS-WIN-Service-Management-L1-1-0.dll
>            C:\Windows\system32\API-MS-WIN-Service-Management-L2-1-0.dll
>            C:\Windows\system32\API-MS-Win-Core-LocalRegistry-L1-1-0.dll
>            C:\Windows\system32\RPCRT4.dll
>              C:\Windows\system32\API-MS-Win-Core-Interlocked-L1-1-0.dll
>              C:\Windows\system32\API-MS-Win-Core-DelayLoad-L1-1-0.dll
>          C:\Windows\system32\USER32.dll
>            C:\Windows\system32\GDI32.dll
>              C:\Windows\system32\LPK.dll
>                C:\Windows\system32\USP10.dll
> 

I see nothing wrong here, time to ask winpty community what might be wrong.

-- 
cyg Simple

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