[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
bug#32703: echo_man_error
From: |
Pádraig Brady |
Subject: |
bug#32703: echo_man_error |
Date: |
Sat, 15 Sep 2018 23:43:34 -0700 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Thunderbird/45.8.0 |
On 11/09/18 11:07, Eric Blake wrote:
> On 9/11/18 11:01 AM, Eric Blake wrote:
>
>> $ POSIXLY_CORRECT=1 /bin/echo a\\nb
>> a\nb
>>
>> Yikes! Even though we asked for POSIX correctness, we are NOT
>> interpreting backslashes. I think this is a bug in GNU coreutils' echo,
>> and could be fixed by the patch below (but the testsuite would also need
>> updates).
>
> And it might even be a regression. Reading through NEWS, I found this
> back in 5.3.0:
>
> echo now conforms to POSIX better. It supports the \0ooo syntax for
> octal escapes, and \c now terminates printing immediately. If
> POSIXLY_CORRECT is set and the first argument is not "-n", echo now
> outputs all option-like arguments instead of treating them as options.
>
> although I haven't actually tested prior versions to see if behavior has
> changed over time.
I agree that we shouldn't be divergent here.
POSIXLY_CORRECT should enable interpretation of escapes.
I don't think it's a regression though.
>From a quick review, default interpretation of escapes
was only controllable at compile time, until -e allowed
interpretation as of commit b7bfc2d2 (textutils-1.22).
Author: Jim Meyering <address@hidden>
Date: Thu Sep 25 12:58:50 1997 +0000
Make echo conform to POSIX. By default, don't
interpret backslash escape sequences.
POSIX may have changed in the meantime, but POSIXLY_CORRECT
was never used as a condition for enabling interpretation of escapes.
cheers,
Pádraig
- bug#32703: echo_man_error, 1064240043, 2018/09/11
- bug#32703: echo_man_error, Eric Blake, 2018/09/11
- bug#32703: echo_man_error, Eric Blake, 2018/09/11
- bug#32703: echo_man_error, Pádraig Brady, 2018/09/23
- bug#32703: echo_man_error, Eric Blake, 2018/09/24
- bug#32703: echo_man_error, Bernhard Voelker, 2018/09/24
- bug#32703: echo_man_error, Pádraig Brady, 2018/09/25
- bug#32703: echo_man_error, Eric Blake, 2018/09/24
- bug#32703: echo_man_error, Pádraig Brady, 2018/09/25