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Re: makecab.exe hangs on cygwin 3.1
- From: Takashi Yano <takashi dot yano at nifty dot ne dot jp>
- To: cygwin at cygwin dot com
- Date: Fri, 10 Jan 2020 20:51:07 +0900
- Subject: Re: makecab.exe hangs on cygwin 3.1
- Dkim-filter: OpenDKIM Filter v2.10.3 conssluserg-03.nifty.com 00ABowBk030238
- References: <97c2e912-8f7d-8ca8-8f7c-bbfaeec26b39@collabora.com>
On Thu, 9 Jan 2020 20:21:46 +0300
Mike Kaganski wrote:
> Using cygwin 3.1.2-1, I get a hang running a makecab.exe job started
> from a perl script.
>
> The version of perl is 5.26.3-2; Windows 10.0.18363 x64.
>
> I was able to create a minimal reproducer in perl:
>
> ############
>
> select STDERR; # non-buffering output - just to see printed messages
> print "Preparing 80 MiB of random data... ";
> open my $randfile, '<:raw', "/dev/random" or die;
> open my $testbin, '>:raw', "test.bin" or die;
> for ( my $i = 0; $i < 20480; $i++ )
> {
> my $buf = '';
> read $randfile, $buf, 4*1024;
> print $testbin $buf;
> }
> close $randfile;
> close $testbin;
> print "done!\n";
>
> my $syscall = "C:/Windows/System32/makecab.exe /V3 test.bin 2\>\&1 |";
> my @makecaboutput = ();
> print "Now the actual test: this hangs with cygwin 3.1 ... ";
> open (CAB, $syscall);
> while (<CAB>) { push(@makecaboutput, $_); }
> close (CAB);
> print "makecab finished!\n"; # <<< this never prints
>
> for ( my $i = 0; $i <= $#makecaboutput; $i++ )
> {
> print $makecaboutput[$i];
> }
>
> ############
>
> I put this code to c:/makecab/test.pm, and run from mintty as
>
> $ perl c:/makecab/test.pm
>
> The text "makecab finished!" never appears with cygwin 3.1; it appears
> as expected (several seconds, most of which is creation of random test
> data) with cygwin 3.0.7-1.
Thanks for the report. I looked into this problem and found
this occurs after commit:
commit e1a0775dc0545b5f9c81b09a327fc110c538b7b4
Author: Takashi Yano <takashi.yano@nifty.ne.jp>
Date: Thu Sep 26 19:52:46 2019 +0900
Cygwin: pty: Fix PTY so that cygwin setup shows help with -h option.
- After commit 169d65a5774acc76ce3f3feeedcbae7405aa9b57, cygwin
setup fails to show help message when -h option is specified, as
reported in https://cygwin.com/ml/cygwin/2019-09/msg00248.html.
This patch fixes the problem.
I have submitted a patch for this issue just now.
--
Takashi Yano <takashi.yano@nifty.ne.jp>
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