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.