Mail Archives: cygwin/2005/05/29/01:48:47
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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