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Subject: Re: zsh hanging when exec'd from bash at login
From: dana <dana@dana.is>
In-Reply-To: <20191021204703.GA18764@freshley.cjoffline.com>
Date: Mon, 21 Oct 2019 21:33:26 -0500
Cc: zsh-users <zsh-users@zsh.org>
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Message-Id: <08FEC4A0-3C40-4855-861A-49A4F055494B@dana.is>
References: <20191021204703.GA18764@freshley.cjoffline.com>
To: Aaron Hall <ahall@vitaphone.net>
X-Mailer: Apple Mail (2.3445.104.11)

It seems to be hanging in acquire_pgrp() (see annotated strace below). I =
guess
it's trying to make itself the process group leader and take over the =
TTY? But
i don't understand what it's getting stuck on

(Maybe should move this to workers)

dana


jobs.c@2929: getpgrp()                               =3D 6976
jobs.c@2935: rt_sigprocmask(SIG_BLOCK, [TSTP TTIN TTOU], [], 8) =3D 0

jobs.c@2936: ioctl(10, TIOCGPGRP, [7096])            =3D 0
jobs.c@2937: getpgrp()                               =3D 6976
jobs.c@2945: ioctl(10, TIOCGPGRP, [7096])            =3D 0
jobs.c@2947: rt_sigprocmask(SIG_SETMASK, [], [TSTP TTIN TTOU], 8) =3D 0
jobs.c@2948: read(0, NULL, 0)                        =3D -1 EIO =
(Input/output error)
jobs.c@2949: rt_sigprocmask(SIG_BLOCK, [TSTP TTIN TTOU], [], 8) =3D 0
jobs.c@2950: getpgrp()                               =3D 6976

jobs.c@2936: ioctl(10, TIOCGPGRP, [7096])            =3D 0
jobs.c@2937: getpgrp()                               =3D 6976
jobs.c@2945: ioctl(10, TIOCGPGRP, [7096])            =3D 0
jobs.c@2947: rt_sigprocmask(SIG_SETMASK, [], [TSTP TTIN TTOU], 8) =3D 0
jobs.c@2948: read(0, NULL, 0)                        =3D -1 EIO =
(Input/output error)
jobs.c@2949: rt_sigprocmask(SIG_BLOCK, [TSTP TTIN TTOU], [], 8) =3D 0
jobs.c@2950: getpgrp()                               =3D 6976

jobs.c@2936: ioctl(10, TIOCGPGRP, [7096])            =3D 0
jobs.c@2937: getpgrp()                               =3D 6976
jobs.c@2945: ioctl(10, TIOCGPGRP, [7096])            =3D 0
jobs.c@2947: rt_sigprocmask(SIG_SETMASK, [], [TSTP TTIN TTOU], 8) =3D 0
jobs.c@2948: read(0, NULL, 0)                        =3D -1 EIO =
(Input/output error)
...