From: Vladislav Zavjalov <slazav@altlinux.org>
To: ALT Linux Team development discussions <devel@lists.altlinux.org>
Subject: Re: [devel] [#210675] EPERM bash.git=4.2.53-alt1
Date: Fri, 27 Jul 2018 15:36:07 +0300
Message-ID: <20180727123607.GA9335@imap.altlinux.org> (raw)
In-Reply-To: <CA+qzennqHkeP53FMcsK0m8z4vO7zrg1TEghkyFud_ZZ9FEKfZw@mail.gmail.com>
On Fri, Jul 27, 2018 at 03:30:52PM +0300, Alexey Tourbin wrote:
> 2018-07-27 15:25 GMT+03:00 Paul Wolneykien <manowar@altlinux.org>:
> > А через || можно переписать, или не сработает?
> >
> > (...) || rc=$?
>
> if/or отрубает режим -e внутри кода, у которого проверяется статус
> возврата. Это известная багофича стандартного шелла, которая скорее
> всего никогда не будет исправлена. Поэтому приходится извращаться.
>
> $ sh -e -c '(false; echo a)'
> $ sh -e -c '(false; echo a) ||:'
> a
Ага, я когда-то придумывал загадку на эту тему. Угадайте результат,
не запуская команды:
$ sh -e -c '! true; echo OK'
$ sh -e -c 'false; echo OK'
$ sh -e -c 'false && false; echo OK'
$ sh -e -c 'false && true; echo OK'
$ sh -e -c 'true && false; echo OK'
prev parent reply other threads:[~2018-07-27 12:36 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-07-24 9:15 ` Aleksei Nikiforov
2018-07-24 9:25 ` Michael Shigorin
2018-07-24 9:33 ` Aleksei Nikiforov
2018-07-24 9:45 ` Alexey Tourbin
2018-07-24 11:29 ` Dmitry V. Levin
2018-07-24 12:09 ` Alexey Tourbin
2018-07-24 12:45 ` Michael Shigorin
2018-07-24 12:47 ` Anton Farygin
2018-07-24 13:07 ` Alexey Tourbin
2018-07-27 12:17 ` Alexey Tourbin
2018-07-27 12:25 ` Paul Wolneykien
2018-07-27 12:30 ` Alexey Tourbin
2018-07-27 12:36 ` Vladislav Zavjalov [this message]
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