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Date: Sun, 22 Dec 2024 10:59:11 +0900
Message-ID: <CAA3frXRiiLrsjOyG+Zx+Ni2ZckjBvbnvETxTsV5Vmie2+7Jkkg@mail.gmail.com>
Subject: Re: zsh (oh-my-zsh) hangs on cygwin-3.5.5-1
To: cygwin@cygwin.com
From: Daisuke Fujimura via Cygwin <cygwin@cygwin.com>
Reply-To: Daisuke Fujimura <booleanlabel@gmail.com>
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> Could you please test if additional SIGCHLD can release hanging?

Start mintty and check the process from another bash.

$ ps
PID PPID PGID WINPID TTY UID STIME COMMAND
1713 1662 1713 6800 cons0 197609 04:26:01 /usr/bin/ps
1671 1 1671 6072 ? 197609 04:25:47 /usr/bin/mintty
I 1672 1671 1672 2096 pty0 197609 04:25:48 /usr/bin/zsh
1662 1 1662 4696 cons0 197609 04:24:21 /usr/bin/bash

After typing enter into zsh several times, the prompt is not returned.

$ ps
PID PPID PGID WINPID TTY UID STIME COMMAND
1728 1727 1672 3948 pty0 197609 04:26:10 /usr/bin/zsh
1731 1662 1731 7644 cons0 197609 04:26:14 /usr/bin/ps
1727 1672 1672 4076 pty0 197609 04:26:10 /usr/bin/zsh
1671 1 1671 6072 ? 197609 04:25:47 /usr/bin/mintty
1672 1671 1672 2096 pty0 197609 04:25:48 /usr/bin/zsh
1662 1 1662 4696 cons0 197609 04:24:21 /usr/bin/bash

SIGCHLD is sent to zsh with mintty as parent, but nothing seems to change.

$ kill -CHLD 1672
$ ps
PID PPID PGID WINPID TTY UID STIME COMMAND
1728 1727 1672 3948 pty0 197609 04:26:10 /usr/bin/zsh
1727 1672 1672 4076 pty0 197609 04:26:10 /usr/bin/zsh
1671 1 1671 6072 ? 197609 04:25:47 /usr/bin/mintty
1672 1671 1672 2096 pty0 197609 04:25:48 /usr/bin/zsh
1733 1662 1733 5388 cons0 197609 04:33:39 /usr/bin/ps
1662 1 1662 4696 cons0 197609 04:24:21 /usr/bin/bash

If SIGKILL is accepted, zsh will exit with mintty, but zsh's
descendant processes will remain.

> Are any additional settings necessary?

- zsh is specified by the environment variable SHELL.
- HOME is a symbolic link. (`/home/myname` -> `/cygdrive/c/Users/myname`)
- My cygwin environment is arm64 (M1 MacBook Pro). Windows is
installed on UTM. ( https://mac.getutm.app/ )
- Since I have several packages that I built myself, they may be
causing the problem.


On Sat, Dec 21, 2024 at 7:47 PM Takashi Yano via Cygwin
<cygwin@cygwin.com> wrote:
>
> On Sat, 21 Dec 2024 19:40:59 +0900
> Takashi Yano wrote:
> > On Sat, 21 Dec 2024 12:30:02 +0900
> > Daisuke Fujimura wrote:
> > > Sometimes the prompt does not return.
> > >
> > > $ ps
> > > PID PPID PGID WINPID TTY UID STIME COMMAND
> > > 378 294 378 5544 pty0 197609 11:26:16 /usr/bin/ps
> > > 351 1 294 6552 pty0 197609 10:13:07 /usr/bin/zsh
> > > 293 1 293 4984 ? 197609 10:13:03 /usr/bin/mintty
> > > 294 293 294 2840 pty0 197609 10:13:04 /usr/bin/zsh
> > > $
> > > # Pressing enter only without typing anything may not return a prompt.
> > > (Send SIGINT by Ctrl-C)
> > > $ ps
> > > PID PPID PGID WINPID TTY UID STIME COMMAND
> > > 351 1 294 6552 pty0 197609 10:13:07 /usr/bin/zsh
> > > 407 294 407 1976 pty0 197609 11:26:24 /usr/bin/ps
> > > 293 1 293 4984 ? 197609 10:13:03 /usr/bin/mintty
> > > 404 1 294 9660 pty0 197609 11:26:19 /usr/bin/zsh
> > > 294 293 294 2840 pty0 197609 10:13:04 /usr/bin/zsh
> > >
> > >
> > > $ zsh --version
> > > zsh 5.8 (x86_64-pc-cygwin)
> > >
> > > $ uname -srvmpio
> > > CYGWIN_NT-10.0-22000 3.5.5-1.x86_64 2024-12-20 16:19 UTC x86_64
> > > unknown unknown Cygwin
> > >
> > > $ cd /path/to/oh-my-zsh
> > > $ git log --oneline -1
> > > b9e73b4 (HEAD -> master, origin/master) docs(per-directory-history):
> > > add variable docs (#12844)
> > >
> > > Removing `source /path/to/oh-my-zsh/oh-my-zsh.sh` from `~/.zshrc` will
> > > not cause such problems.
> > >
> > > Cygwin-3.5.4-1 does not have this problem.
> >
> > Could you please test if additional SIGCHLD can release hanging?
> > kill -SIGCHLD <pid_of_hanging_zsh>
>
> Oops!
> s/SIGCHLD/CHLD/
>
> --
> Takashi Yano <takashi.yano@nifty.ne.jp>
>
> --
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