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Re: ${p+\"$p\"}

From: Eric Blake
Subject: Re: ${p+\"$p\"}
Date: Tue, 22 Jan 2019 20:23:50 -0600
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.4.0

On 1/22/19 6:36 PM, 積丹尼 Dan Jacobson wrote:
> OK so bash is right and dash is wrong? So I should file a dash bug?

Rather, POSIX says the behavior is undefined, so both shells are right,
and you cannot portably use " inside ${p+...} when in a double-quoted
context (such as a heredoc).

For more details:

Eric Blake, Principal Software Engineer
Red Hat, Inc.           +1-919-301-3226
Virtualization:  qemu.org | libvirt.org

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