From: Sergey Vlasov <vsu@altlinux.ru> To: devel@lists.altlinux.org Subject: Re: [devel] bash4 Date: Fri, 13 Aug 2010 22:30:16 +0400 Message-ID: <20100813183016.GA6764@atlas.home> (raw) In-Reply-To: <20100813154321.GA7685@imap.altlinux.org> [-- Attachment #1: Type: text/plain, Size: 1267 bytes --] On Fri, Aug 13, 2010 at 07:43:21PM +0400, Alexey Tourbin wrote: > Есть ещё одна нехорошая засада - у нас /bin/sh и /bin/bash собраны > в очень разной конфигурации: у них отличается синтаксис. Я ставил > этот вопрос ещё 6 лет назад! > > $ sh -c 'diff <(echo a) <(echo b)' > sh: -c: line 0: syntax error near unexpected token `(' > sh: -c: line 0: `diff <(echo a) <(echo b)' > $ bash -c 'diff <(echo a) <(echo b)' > 1c1 > < a > --- > > b > $ Это не конфигурация, а документированная зависимость поведения bash от имени, использованного при вызове, и отключение поддержки process substitution в режиме совместимости с POSIX (документировано только в info bash, в man в явном виде не описано): $ bash --posix -c 'diff <(echo a) <(echo b)' bash: -c: line 0: syntax error near unexpected token `(' bash: -c: line 0: `diff <(echo a) <(echo b)' $ ln -s /bin/bash sh; ./sh -c 'diff <(echo a) <(echo b)' ./sh: -c: line 0: syntax error near unexpected token `(' ./sh: -c: line 0: `diff <(echo a) <(echo b)' $ sh -c 'set +o posix diff <(echo a) <(echo b)' 1c1 < a --- > b (в последнем случае нужно именно \n в строке, через разделитель ';' не сработает - видимо, переключение опции posix происходит только при разборе следующей строки). [-- Attachment #2: Digital signature --] [-- Type: application/pgp-signature, Size: 198 bytes --]
next prev parent reply other threads:[~2010-08-13 18:30 UTC|newest] Thread overview: 44+ messages / expand[flat|nested] mbox.gz Atom feed top 2010-08-09 8:40 Ildar Mulyukov 2010-08-09 9:40 ` Dmitry V. Levin 2010-08-09 10:58 ` Kirill A. Shutemov 2010-08-09 11:02 ` Michael Shigorin 2010-08-09 11:52 ` Kirill A. Shutemov 2010-08-09 11:02 ` Ildar Mulyukov 2010-08-09 11:13 ` Alexey I. Froloff 2010-08-09 11:16 ` Andrey Rahmatullin 2010-08-09 11:21 ` Ildar Mulyukov 2010-08-09 11:25 ` Alexey I. Froloff 2010-08-09 12:36 ` Alexey Gladkov 2010-08-09 12:39 ` Ildar Mulyukov 2010-08-09 12:42 ` Alexey Gladkov 2010-08-09 13:43 ` Michael Shigorin 2010-08-09 12:41 ` Andrey Rahmatullin 2010-08-09 12:56 ` Alexey Gladkov 2010-08-09 13:11 ` Alexey Gladkov 2010-08-09 13:13 ` Andrey Rahmatullin 2010-08-09 13:21 ` Alexey Gladkov 2010-08-09 13:29 ` Ildar Mulyukov 2010-08-09 13:38 ` Andrey Rahmatullin 2010-08-09 13:40 ` Alexey Gladkov 2010-08-10 12:15 ` Ildar Mulyukov 2010-08-10 12:25 ` Andrey Rahmatullin 2010-08-12 21:22 ` Michael Shigorin 2010-08-12 21:44 ` Dmitry V. Levin 2010-08-13 3:27 ` Andrey Rahmatullin 2010-08-13 12:48 ` Денис Смирнов 2010-08-13 15:43 ` Alexey Tourbin 2010-08-13 18:30 ` Sergey Vlasov [this message] 2010-08-13 19:43 ` Alexey Tourbin 2010-08-09 13:38 ` Alexey I. Froloff 2010-08-09 13:39 ` Andrey Rahmatullin 2010-08-09 13:14 ` Ildar Mulyukov 2010-08-09 13:11 ` Dmitriy Kruglikov 2010-08-09 12:47 ` Dmitry V. Levin 2010-08-16 4:14 ` Alexey Tourbin 2010-08-16 10:12 ` Dmitry V. Levin 2010-08-16 12:55 ` Денис Смирнов 2010-08-16 13:01 ` Alexey Gladkov 2010-08-16 13:07 ` Денис Смирнов 2010-08-10 12:28 ` Dmitry V. Levin 2010-08-10 12:32 ` Ildar Mulyukov 2010-08-10 13:24 ` Alexey I. Froloff
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