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Re: Some globstar patterns produce duplicate entries and a null filename


From: Ulf Magnusson
Subject: Re: Some globstar patterns produce duplicate entries and a null filename
Date: Sun, 2 Dec 2012 17:40:52 +0100

On Sun, Dec 2, 2012 at 4:58 PM, Roman Rakus <address@hidden> wrote:
> On 12/01/2012 04:41 PM, Ulf Magnusson wrote:
>>
>> GNU bash, version 4.2.24(1)-release (i686-pc-linux-gnu)
>>
>> Take the following example, assumed to be run in an empty directory:
>>
>> $ mkdir a
>> $ echo **
>> a
>> $ echo **/**
>>   a a
>> $ echo **/**/**
>>   a a a
>>
>> I would expect the result to be just 'a' in all cases.
>>
>> You also get back a null filename, as shown by
>>
>> $ for f in **/**/**; do echo "'$f'"; done
>> ''
>> 'a'
>> 'a'
>> 'a'
>>
>> /Ulf
>>
> I can't reproduce it on my Fedora with bash 4.2.10 nor 4.2.39. Tried turn on
> and off extglob shell option.
> Can you please resend your report with `bashbug' script? Or at least say
> which linux distribution you are using?
>
> RR
>

Ubuntu 12.04. My configuration is
https://github.com/ulfalizer/Configuration-files/blob/master/bash,
which I 'source' from the standard Ubuntu ~/.bash. I noticed the bug
while implementing the _super_glob function.

bashbug information:

Machine: i686
OS: linux-gnu
Compiler: gcc
Compilation CFLAGS:  -DPROGRAM='bash' -DCONF_HOSTTYPE='i686'
-DCONF_OSTYPE='linux-gnu' -DCONF_MACHTYPE='i686-pc-linux-gnu'
-DCONF_VENDOR='pc' -DLOCALEDIR='/usr/share/locale' -DPACKAGE='bash'
-DSHELL -DHAVE_CONFIG_H   -I.  -I../bash -I../bash/include
-I../bash/lib  -D_FORTIFY_SOURCE=2 -g -O2 -fstack-protector
--param=ssp-buffer-size=4 -Wformat -Wformat-security
-Werror=format-security -Wall
uname output: Linux Huvuddator 3.2.0-32-generic-pae #51-Ubuntu SMP Wed
Sep 26 21:54:23 UTC 2012 i686 i686 i386 GNU/Linux
Machine Type: i686-pc-linux-gnu

/Ulf



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