GNU bug report logs - #12115
Please add tip about using tac to reverse a file byte-by-byte

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Package: coreutils;

Reported by: Reuben Thomas <rrt <at> sc3d.org>

Date: Wed, 1 Aug 2012 21:46:01 UTC

Severity: normal

Done: Paul Eggert <eggert <at> cs.ucla.edu>

Bug is archived. No further changes may be made.

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Message #29 received at 12115 <at> debbugs.gnu.org (full text, mbox):

From: "Voelker, Bernhard" <bernhard.voelker <at> siemens-enterprise.com>
To: Jim Meyering <jim <at> meyering.net>, Andreas Schwab <schwab <at> linux-m68k.org>
Cc: "12115 <at> debbugs.gnu.org" <12115 <at> debbugs.gnu.org>,
	Reuben Thomas <rrt <at> sc3d.org>
Subject: RE: bug#12115: Please add tip about using tac to reverse a file
	byte-by-byte
Date: Thu, 2 Aug 2012 12:25:02 +0000

Jim Meyering wrote (Thursday, August 02, 2012 2:08 PM):

> You need the double quotes around $nl with bash,
> but not with zsh:
> 
>     zsh$ nl='
>     quote> '
>     zsh$ printf %s $nl
> 
>    zsh$

For bash, one solution is:

	$ printf '\na\nb'|tac -rs '.\|'$(printf "\n")
	
	b
	a
	$

;-)

Have a nice day,
Berny
This bug report was last modified 12 years and 114 days ago.

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