GNU bug report logs - #28316
tr -d

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Package: coreutils;

Reported by: John Pateman <jpateman <at> gmail.com>

Date: Fri, 1 Sep 2017 15:09:02 UTC

Severity: normal

Tags: notabug

Done: Eric Blake <eblake <at> redhat.com>

Bug is archived. No further changes may be made.

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Report forwarded to bug-coreutils <at> gnu.org:
bug#28316; Package coreutils. (Fri, 01 Sep 2017 15:09:02 GMT) Full text and rfc822 format available.
Acknowledgement sent to John Pateman <jpateman <at> gmail.com>:
New bug report received and forwarded. Copy sent to bug-coreutils <at> gnu.org. (Fri, 01 Sep 2017 15:09:02 GMT) Full text and rfc822 format available.

Message #5 received at submit <at> debbugs.gnu.org (full text, mbox):

From: John Pateman <jpateman <at> gmail.com>
To: bug-coreutils <at> gnu.org
Subject: tr -d
Date: Fri, 1 Sep 2017 12:28:32 +0100

[Message part 1 (text/plain, inline)]
macOS 10.12.

Problems with tr -d
Removal of character 'd' from test string when tr invoked with -d
incantation.

Example

[abc <at> xyx] ~ $ echo uuid:8ddddb8d5 | tr -d 'uuid:'

Expected output
8ddddb8d5

Actual output
8b85

[Message part 2 (text/html, inline)]
Added tag(s) notabug. Request was from Eric Blake <eblake <at> redhat.com> to control <at> debbugs.gnu.org. (Fri, 01 Sep 2017 17:10:01 GMT) Full text and rfc822 format available.
Reply sent to Eric Blake <eblake <at> redhat.com>:
You have taken responsibility. (Fri, 01 Sep 2017 17:10:02 GMT) Full text and rfc822 format available.
Notification sent to John Pateman <jpateman <at> gmail.com>:
bug acknowledged by developer. (Fri, 01 Sep 2017 17:10:03 GMT) Full text and rfc822 format available.

Message #12 received at 28316-done <at> debbugs.gnu.org (full text, mbox):

From: Eric Blake <eblake <at> redhat.com>
To: John Pateman <jpateman <at> gmail.com>, 28316-done <at> debbugs.gnu.org
Subject: Re: bug#28316: tr -d
Date: Fri, 1 Sep 2017 12:09:08 -0500

[Message part 1 (text/plain, inline)]
tag 28316 notabug
thanks

On 09/01/2017 06:28 AM, John Pateman wrote:
> macOS 10.12.
> 
> Problems with tr -d
> Removal of character 'd' from test string when tr invoked with -d
> incantation.
> 
> Example
> 
> [abc <at> xyx] ~ $ echo uuid:8ddddb8d5 | tr -d 'uuid:'

That asks tr to delete all individual instances of 'd', 'i', 'u', and
':' in the input string, regardless of their context.

> 
> Expected output
> 8ddddb8d5
> 
> Actual output
> 8b85

The behavior you observed was correct. To get what you want, you need to
use a tool that can do substring removal, rather than individual
character removal; sed and awk are such tools:

$ echo uuid:8ddddb8d5 | sed s/uuid://
8ddddb8d5

As such, I'm tagging this as not a bug; but feel free to reply with any
further questions on the topic.

-- 
Eric Blake, Principal Software Engineer
Red Hat, Inc.           +1-919-301-3266
Virtualization:  qemu.org | libvirt.org


[signature.asc (application/pgp-signature, attachment)]
bug archived. Request was from Debbugs Internal Request <help-debbugs <at> gnu.org> to internal_control <at> debbugs.gnu.org. (Sat, 30 Sep 2017 11:24:04 GMT) Full text and rfc822 format available.
This bug report was last modified 7 years and 268 days ago.

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