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Date: Sat, 28 May 2005 22:48:21 -0700
From: Yitzchak Scott-Thoennes <sthoenna AT efn DOT org>
To: cygwin AT cygwin DOT com
Subject: Re: 1.5.16: DuplicateHandle(Out) failed (e=6)
Message-ID: <20050529054820.GA3024@efn.org>
References: <1117157441 DOT 475ed70cnlm24 AT email DOT byu DOT edu>
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On Thu, May 26, 2005 at 07:30:41PM -0600, Nathan L Mullen wrote:
> I recently upgraded from Cygwin 1.5.6-1 to 1.5.16-1.  

Does it still happen with 1.5.17-1?

Did you upgrade perl at the same time?  If so, do you know what
the old version was?

> I received the following error from GNU make 3.80 when I ran ???mk??? in Cygwin 1.5.16: 
> 
> process_easy: DuplicateHandle(Out) failed (e=6)
> t:/make/380/bin/make: interrupt/Exception caught (code = 0xc0000005, addr = 0x417344) system() returned code 65280: exit code 255
> 
> As both mk and make 3.80 are big (and don???t have a lot to do with Cygwin), I have spent some time narrowing down the problem.  I have produced a set of small files that produce the same error.  A very specific script structure is needed to reproduce the error (a bash script must call a perl script, which in turn must use back-ticks to run an executable that has a call to DuplicateHandle(Out)) (that is the same script structure that mk uses--and that causes DuplicateHandle(Out) to fail).  
> 
> Here are the 3 necessary files to reproduce the error (showProb.sh, showProb.pl, showProb.c):
> 
> 
> showProb.sh: ###########################################
>     #!/bin/sh
>     perl -S showProb.pl

That's not a bash script.
Is the -S necessary?  (= search for perl script on your path)
 
> showProb.pl: ##########################################
>   system("showProb.exe"); #this DupHandle works correctly
>   $cwd = `pwd`; # This completes successfully
>   system("showProb.exe"); #now DupHandle does _NOT_ work
> 
> 
> 
> showProb.c: ###########################################
>   /*
>   * Description: A very stripped-down version of process_easy in    
>   * GNU make 3.80 (make/380/w32/subproc/sub_proc.c)
>   */
>   #include <stdlib.h>
>  #include <stdio.h>
>  #include <process.h>  /* for msvc _beginthreadex, _endthreadex */
>  #include <windows.h>
>  int main(){
>   HANDLE hOut;
>   if (DuplicateHandle(GetCurrentProcess(),
>                       GetStdHandle(STD_OUTPUT_HANDLE),
>                       GetCurrentProcess(),
>                       &hOut,
>                       0,
>                       TRUE,
>                       DUPLICATE_SAME_ACCESS) == FALSE) {
>      
>     fprintf(stderr, "\nprocess_easy: DuplicateHandle(Out) failed (e=%d)\n", GetLastError());
>     /*return INVALID_HANDLE_VALUE;*/
>   }
>   else{
>     fprintf(stderr, "\nprocess_easy: DuplicateHandle(Out) SUCCESS\n");
>   }
>   CloseHandle(hOut);
>   return 0;
> }
> 
> 
> 
> I used cl to compile showProb.c: ???cl showProb.c ???o showProb.exe???.

Does it fail for you compiled with:

 gcc -o showProb.exe -mno-cygwin showProb.c

It doesn't for me, on cygwin 1.5.17-1.

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