From: Oleg Bulatov <oleg@bulatov.me>
To: dash@vger.kernel.org
Subject: heredoc and subshell
Date: Wed, 24 Feb 2016 01:07:44 +0300 [thread overview]
Message-ID: <2978711456265264@web9h.yandex.ru> (raw)
Hello,
trying to minimize a shell code I found an unobvious moment with heredocs and subshells.
Is it specified by POSIX how next code should be parsed? dash output for this code differs from bash and zsh.
--- code
prefix() { sed -e "s/^/$1:/"; }
DASH_CODE() { :; }
prefix A <<XXX && echo "$(prefix B <<XXX
echo line 1
XXX
echo line 2)" && prefix DASH_CODE <<DASH_CODE
echo line 3
XXX
echo line 4)"
echo line 5
DASH_CODE
--- bash 4.3.42 output:
A:echo line 3
B:echo line 1
line 2
DASH_CODE:echo line 4)"
DASH_CODE:echo line 5
--- dash 0.5.8 output:
A:echo line 1
B:echo line 2)" && prefix DASH_CODE <<DASH_CODE
B:echo line 3
line 4
line 5
--
Oleg
next reply other threads:[~2016-02-23 22:16 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-02-23 22:07 Oleg Bulatov [this message]
2016-02-23 22:49 ` heredoc and subshell Eric Blake
2016-02-23 23:16 ` Eric Blake
[not found] ` <56CCE1E3.1060805-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2016-02-24 10:58 ` Joerg Schilling
[not found] ` <56cd8cd1.LdVYbpfe+0tQMm8I%Joerg.Schilling-8LS2qeF34IpklNlQbfROjRvVK+yQ3ZXh@public.gmane.org>
2016-02-24 12:27 ` Shware Systems
2016-02-24 12:32 ` Joerg Schilling
2016-02-24 20:27 ` Oleg Bulatov
2016-02-23 23:18 ` Jilles Tjoelker
2016-02-24 8:46 ` Thorsten Glaser
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