From: Jun T <takimoto-j@kba.biglobe.ne.jp>
To: zsh-workers@zsh.org
Subject: Re: zargs with -P intermittently failing in zsh 5.9 and macOS
Date: Thu, 26 May 2022 17:57:45 +0900 [thread overview]
Message-ID: <F4E8CACF-ED46-4809-8977-37213538A0FE@kba.biglobe.ne.jp> (raw)
In-Reply-To: <CAH+w=7a4-QWdF1ApCjYs8YMwafeb1+_EyrgX=6BwRM6_0cwK8w@mail.gmail.com>
> 2022/05/25 2:32, Bart Schaefer <schaefer@brasslantern.com> wrote:
>
>> +(eval):6> case 19 (<1-125>|128)
>> +(eval):8> ret=123
>>
>> at least once, even though f always returned 0.
>
> Something is causing the subshell that was running f to exit with
> status 19 even though f returned 0.
The problem can be reproduced by the following simplified script:
#!/bin/zsh
_zajobs=()
( # works OK if not run in a subshell
np=10 # try increasing this if you do not get $? = 19
for ((i=0; i<$np; ++i)); do
curl -so /dev/null 'https://example.com' & _zajobs+=( $! )
done
#sleep 1 # works OK if 'sleep 1' is added here
wait # works OK if this line is commented out
for p in $_zajobs; do
wait $p
echo $p $?
done
)
If I run this script on my Mac, a few (one or two in most cases, zero or
three sometimes) of the ten "wait $p" give $? = 19.
But all the "wait $p" return 0 if
(1) remove the "wait" before the "for p in $_zajobs", or
(2) add "sleep 1" before the "wait", or
(3) run whole script in the main shell, i.e., remove the enclosing
"(" and ")", or
(4) replace "curl -so /dev/null 'https://example.com'" by "sleep 1",
or
(5) run the script on Linux (I haven't tried other BSDs).
(1)(2) may indicate that the first "wait" (without $p) can't correctly
wait for some of the child procs...?
next prev parent reply other threads:[~2022-05-26 8:58 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-05-24 16:09 Eric Nielsen
2022-05-24 17:32 ` Bart Schaefer
2022-05-24 20:21 ` Eric Nielsen
2022-05-24 20:35 ` Bart Schaefer
2022-05-26 8:57 ` Jun T [this message]
2022-05-26 11:21 ` Jun. T
2022-05-27 3:39 ` Bart Schaefer
2022-05-27 4:18 ` Lawrence Velázquez
2022-05-27 5:29 ` Jun T
2022-05-27 16:10 ` Bart Schaefer
2022-05-27 17:25 ` Jun. T
2022-05-29 3:30 ` Bart Schaefer
2022-05-29 14:47 ` Jun. T
2022-05-29 20:07 ` Bart Schaefer
2022-05-30 11:16 ` Jun T
2022-06-07 6:51 ` Jun T
2022-06-09 2:56 ` Bart Schaefer
2022-06-12 16:43 ` Eric Nielsen
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