GNU bug report logs - #19857
BUG with head "-n-0"

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

From: matshyeq <matshyeq <at> gmail.com>
To: bug-coreutils <at> gnu.org
Subject: BUG with head "-n-0"
Date: Fri, 13 Feb 2015 16:21:12 +0000

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Hi All,

I think I've found an issue when head is called with -n-0 parameter
It should return whole file but only seem to work for files with newline
character at the end.
For those that don't have it - it doesn't return anything.

BTW. I know -n-0 might be nonsensical but in my case simply pass the number
of rows to skip in a variable.

Regards,
Maciek

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Message #8 received at 19857 <at> debbugs.gnu.org (full text, mbox):

From: Pádraig Brady <P <at> draigBrady.com>
To: matshyeq <matshyeq <at> gmail.com>, 19857 <at> debbugs.gnu.org
Subject: Re: bug#19857: BUG with head "-n-0"
Date: Fri, 13 Feb 2015 17:23:15 +0000

unarchive 16329
forcemerge 19857 16329
stop

On 13/02/15 16:21, matshyeq wrote:
> Hi All,
> 
> I think I've found an issue when head is called with -n-0 parameter
> It should return whole file but only seem to work for files with newline character at the end.
> For those that don't have it - it doesn't return anything.
> 
> BTW. I know -n-0 might be nonsensical but in my case simply pass the number of rows to skip in a variable.

Fixed in version 8.23
http://git.savannah.gnu.org/gitweb/?p=coreutils.git;a=commitdiff;h=476ce370

thanks,
Pádraig.

Message #11 received at 19857 <at> debbugs.gnu.org (full text, mbox):

From: Paul Eggert <eggert <at> cs.ucla.edu>
To: matshyeq <matshyeq <at> gmail.com>, 19857 <at> debbugs.gnu.org
Subject: Re: bug#19857: BUG with head "-n-0"
Date: Fri, 13 Feb 2015 09:25:11 -0800

matshyeq wrote:
> I think I've found an issue when head is called with -n-0 parameter
> It should return whole file but only seem to work for files with newline
> character at the end.

I'm not observing this problem on Ubuntu 14.10 x86-64; see below.  Which 
platform and version of 'head' are you running?  Can you send a recipe to 
reproduce the bug?

$ printf 'abc\ndef\nghi' >t
$ head -n-0 t
abc
def
ghi$ head --version | head -n1
head (GNU coreutils) 8.23

Message #14 received at 19857 <at> debbugs.gnu.org (full text, mbox):

From: matshyeq <matshyeq <at> gmail.com>
To: Paul Eggert <eggert <at> cs.ucla.edu>
Cc: 19857 <at> debbugs.gnu.org
Subject: Re: bug#19857: BUG with head "-n-0"
Date: Fri, 21 Aug 2015 17:34:38 +0100

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I can confirm BUG exists on

CentOS Linux release 7.1.1503 (Core)
# head --version
head (GNU coreutils) 8.22
Copyright (C) 2013 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html
>.
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.

Written by David MacKenzie and Jim Meyering.

# printf 'abc\ndef\nghi\n'>head_test_ok.txt
# head -n-0 head_test_ok.txt
abc
def
ghi
# printf 'abc\ndef\nghi'>head_test_nok.txt
# head -n-0 head_test_nok.txt

Thank you,
Kind Regards
~Maciek

On Fri, Feb 13, 2015 at 5:25 PM, Paul Eggert <eggert <at> cs.ucla.edu> wrote:

> matshyeq wrote:
>
>> I think I've found an issue when head is called with -n-0 parameter
>> It should return whole file but only seem to work for files with newline
>> character at the end.
>>
>
> I'm not observing this problem on Ubuntu 14.10 x86-64; see below.  Which
> platform and version of 'head' are you running?  Can you send a recipe to
> reproduce the bug?
>
> $ printf 'abc\ndef\nghi' >t
> $ head -n-0 t
> abc
> def
> ghi$ head --version | head -n1
> head (GNU coreutils) 8.23
>
>

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