On Sat, 1 Feb 2020 07:39:08 +0000 (UTC)
"Anon User via cygwin" wrote:
> I first reported this problem to the Mintty project at GitHub. With their
> help, I was able to debug the issue to the call to forkpty. I installed tmux
> and found it also hangs the exact same way. My guess is any process which
> makes this fork call will hang in a similar way. Rather than copy/paste the
> thread, I'd rather just refer you to there :
> https://github.com/mintty/mintty/issues/960
>
> I will also direct link to the strace log I made which includes my comment
> showing where the hang happens:
> https://github.com/mintty/mintty/files/4136651/mintty.strace.log (Line 718 is
> the hanging point.)
>
> Also Windows 10's analyze wait chain function in TaskManager shows the
> process waiting for Network I/O, but we see no evidence of network activity.
> https://i.imgur.com/Uiw9laH.png
>
> I haven't seen any other windows applications hang thusly, so I'm at a loss
> for what I've done to my windows system to have caused this. Otherwise, I'd
> expect others to share my pain. Any ideas?
What happens if you run the following test code?
#include <stdio.h>
#include <unistd.h>
#include <pty.h>
int main()
{
int pm, ps;
printf("Start.\n");
openpty(&pm, &ps, NULL, NULL, NULL);
printf("PTY opened.\n");
close(pm);
close(ps);
printf("PTY closed.\n");
return 0;
}
--
Takashi Yano <takashi.y...@nifty.ne.jp>
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