Thanks for your explanations.

Regards,
Benoit


2014-03-27 17:00 GMT+01:00 Pádraig Brady <P@draigbrady.com>:

> tag 17121 notabug
> close 17121
> stop
>
> On 03/27/2014 09:43 AM, Benoît DUNAND-LAISIN wrote:
> > Problem discovered in tr (GNU coreutils) 8.13 on a Ubuntu 12.04.
> >
> > Running those commands:
> >
> > cd $HOME
> > echo "Linux" | tr [:upper:] [:lower:]
> >
> > will result: linux
> >
> > Running the same from /usr/bin:
> >
> > cd /usr/bin
> > echo "Linux" | tr [:upper:] [:lower:]
> >
> > will result: winux
> > which is obviously a bad answer.
> >
> > In debug mode:
> >
> > sh -xc "echo "Linux" | tr [:upper:] [:lower:]"
> > + echo Linux
> > + tr [:upper:] w
> > winux
>
> You debugged correctly but failed to see that
> tr was getting passed the wrong options. See 'w' above.
> That's because the shell is interpreting the [...]
> You need to quote it:
>
> $ echo 'Linux' | tr '[:upper:]' '[:lower:]'
>
> thanks,
> Pádraig.
>
> p.s. cd without the $HOME changes to the home directory
>