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Subject: RE: [cygcheck] produces repeated output - 6 times!
Date: Mon, 4 May 2009 10:35:46 -0500
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From: "Thrall, Bryan" <bryan DOT thrall AT flightsafety DOT com>
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Christopher Faylor wrote on Monday, May 04, 2009 10:18 AM:

> On Mon, May 04, 2009 at 03:11:02PM +0000, Greg Chicares wrote:
>> On 2009-05-04 14:44Z, Thrall, Bryan wrote:
>>> Corinna Vinschen wrote on Monday, May 04, 2009 3:25 AM:
>>>> On Apr 28 11:47, Julio Costa wrote:
>>>>> Bug in cygcheck? Or bug in user? :)
>>>>=20
>>>> Bug in user as far as the position of the -v option is concerned.
>>>=20
>>> I can reproduce it; some more details:
>>>=20
>>> - 'cygcheck /bin/ash.exe -v' returns 127
>>> - it doesn't happen if run from cmd.exe
>>> - '/bin/ash.exe -v' from inside bash works just fine
>>>=20
>>> Isn't there a feature of Cygwin where it tries 5 or 6 times to
restart
>>> Windows apps (such as cygcheck) if they fail in a certain way? That
>>> could explain the repeated output (i.e. cygcheck is trying to do the
>>> documented 'cygcheck [PROGRAM] -v' thing but there's a bug), but my
>>> search fu wasn't able to bring up any results.
>>=20
>> Search for 'proc_retry' in the User's Guide.
>>=20
>> Try setting
>>  CYGWIN=3Dproc_retry:1
>> to see whether that's what's happening in this case.

Thanks, Greg, for the pointer!

> If it is, then cygcheck would be exiting with a bad status and bash
> would be causing cygcheck to restart.  You wouldn't see the problem
from
> the windows command line.

Aren't those the exact symptoms I described?

> cygcheck itself would not be redoing anything because 1) it isn't a
true
> cygwin program and 2) it isn't starting a process when it displays dll
> information.

Unfortunately, unless I'm doing something wrong, it isn't due to
proc_retry:

thrall AT pc1163-8413-xp ~
$ echo $CYGWIN

thrall AT pc1163-8413-xp ~
$ cygcheck /bin/ash.exe -v
C:\cygwin_1.7\bin\ash.exe
  C:\cygwin_1.7\bin\cygwin1.dll
    C:\WINDOWS\system32\ADVAPI32.DLL
      C:\WINDOWS\system32\ntdll.dll
      C:\WINDOWS\system32\KERNEL32.dll
      C:\WINDOWS\system32\RPCRT4.dll

<5 more copies of the DLL info>

thrall AT pc1163-8413-xp ~
$ export CYGWIN=3Dproc_retry:1
thrall AT pc1163-8413-xp ~
$ cygcheck /bin/ash.exe -v
C:\cygwin_1.7\bin\ash.exe
  C:\cygwin_1.7\bin\cygwin1.dll
    C:\WINDOWS\system32\ADVAPI32.DLL
      C:\WINDOWS\system32\ntdll.dll
      C:\WINDOWS\system32\KERNEL32.dll
      C:\WINDOWS\system32\RPCRT4.dll

<5 more copies of the DLL info>

Oh well, at least I learned something :)
--=20
Bryan Thrall
FlightSafety International
bryan DOT thrall AT flightsafety DOT com

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