Re: [Help-bash] bash 4.3 escaping : (breaking script), unlike 4.2. Huh?

[B. S.]

Thanks!

Would never have found this, let alone with such efficiency!

Worst case, current code of if later bash (which I guess I should change 
to if later tar), of:

mytocommands=blah

# inserted code
if later bash {
  myshfile=mktemp
  echo $mytocommands > $myshfile
  mytocommands=myshfile
}

Letting me leave 'tar -to-command=$mytocommands' alone, works.

I expect I'll try mytocommands="bash blah", but otherwise won't waste 
further eyespace on this - I've been hunting this wumpus for many hours 
and several days now. (Saying to myself "It shouldn't be THIS hard!" 
several times along the way.)


* Thanks to everyone for having this list, and it being so responsive! A 
few minutes here, some patience == a faster path to resolution than all 
the time I spent hunting prior.


On 10/23/2016 07:41 PM, Eduardo Bustamante wrote:
> OK, so the assumption here is that your interactive shell is Bash.
> Nothing has changed in bash that would cause the escaping that you're
> seeing. Bash passes the arguments unmodified to GNU tar (another
> assumption is that you're running system's tar, which in Ubuntu 14.04
> is GNU tar 1.27.1-1 [1]).
>
> Reading through the commit logs in GNU tar code repository, you can
> find the following commit:
>
>      hp% PAGER=cat git show 61cd3f
>      commit 61cd3fd26855d40ee3a6491b2aa3611cd2aae46c
>      Author: Sergey Poznyakoff <address@hidden>
>      Date:   Thu Apr 14 11:51:38 2016 +0300
>
>          Fix argument handling when running external commands.
>
>          * src/system.c (xexec): Use sh -c to run the command.  This fixed
>          bug introduced by 7b5e80396 (tar 1.27)
>          * doc/tar.texi: Fix checkpoint examples: (1) $TAR_FILENAME
>          is not available when creating archive and (2) --checkpoint
>          can't be used as abbreviation of --checkpoint-action
>      [...]
>
> If you inspect the patch for src/system.c [2], you'll realize that
> this was fixed after version 1.27. I'm not sure what the best option
> is here, but you need to upgrade your tar command.
>
> More links to read:
>
> - Re: [Bug-tar] How one can do untar a file and gzip
> its files with one command line?
> http://osdir.com/ml/bug-tar-gnu/2016-04/msg00011.html
>
>
> [1] http://packages.ubuntu.com/trusty/tar
> [2] 
> http://git.savannah.gnu.org/cgit/tar.git/commit/?id=61cd3fd26855d40ee3a6491b2aa3611cd2aae46c