Re: [Bug report] Incorrect handling of backslashes in read -r

[Peter Wu <peter@xxxxxxxxxxxxx>]

On Fri, Jan 04, 2019 at 01:43:16PM +0000, Harald van Dijk wrote:
> On 04/01/2019 13:20, Peter Wu wrote:
> > Hi,
> > 
> > Dash 'read' builtin with the '-r' option is not POSIX-compliant:
> > 
> >      $ printf 'omg\\bar\\x41-\\\\-\n' > input
> >      $ dash -c 'read -r x < input; cat input; echo "$x"'
> >      omg\bar\x41-\\-
> >      omar\x41-\-
> > 
> > The outputs are expected to be equal (which is the case with bash).
> > Originally found in dash 0.5.8-2.10 (Ubuntu 18.04), but also reproduced
> > with dash 0.5.10.2-1 (Arch Linux).
> 
> This isn't read giving the backslashes special treatment, it's echo. Use
> printf "%s\n" "$x" instead and you will get the same output.

Sure enough, that was the problem. Sorry for the noise and thank you for
pointing it out!

Kind regards,
Peter