Re: Shell substitution with quotes in bash-4.1

[Julien Thomas]

jthomas@blackbird:~$ foo=aXb ; echo "$BASH_VERSION : ${foo/X/\'}"
4.2.53(1)-release : a\'b

jthomas@blackbird:~$ foo=aXb ; echo "$BASH_VERSION : ${foo/X/$'\x27'}"
bash: bad substitution: no closing `}' in "$BASH_VERSION : ${foo/X/'}"

jthomas@blackbird:~$ q=$'\x27'; foo=aXb ; echo "$BASH_VERSION : ${foo/X/$q}"
4.2.53(1)-release : a'b

Julien

On 02/26/2015 02:20 PM, Corentin Peuvrel wrote:
> Hello,
>
> I found a bug in bash-4.1 (CentOS 6) that was fixed (at least) in
> bash-4.3 (Fedora 21).
>
> $ foo=aXb ; echo "$BASH_VERSION : ${foo/X/\'}"
> 4.3.33(1)-release : a'b
>
> $ foo=aXb ; echo "$BASH_VERSION : ${foo/X/\'}"
> 4.1.2(1)-release : a\'b
>
> The shell substitution add the backslash before the quote, but it
> shouldn't (and ${foo/X/'} fail because it wait for an ending quote).
>
> I was wondering if it was possible to backport a fix in 4.1 ?
>
>
> Thank you,