[ale] changing dash to bash in ubuntu

[Michael Potter]

You are correct: sh does not support pipefail.

I advocate that if one writes scripts that pipes commands together one
should use a shell that supports pipefail and one should turn that
option on.

-- 
Michael Potter

On Sat, Feb 19, 2011 at 9:27 AM, Pat Regan <thehead at patshead.com> wrote:
> On Sat, 19 Feb 2011 09:02:35 -0500
> Michael Potter <michael at potter.name> wrote:
>
>> I had never heard of dash until this thread.
>> I did a little googling and it appears that dash does not support 'set
>> -o pipefail'.
>> That alone is a deal killer for me.
>
> Some very light googling seems to suggest that old school `sh` doesn't
> support `pipefail`.  I may be wrong, googling for anything related to
> `sh` points to `bash` more often than anything else.
>
>> I have read that who are concerned about the overhead of bash should
>> consider pdksh.  pdksh support pipefail.
>>
>
> You're right about the overhead, `pdksh` looks almost identical to
> `dash`.
>
> I'm pretty am pretty ambivalent about the whole thing.  I don't really
> worry about what shell my system uses for its own scripts.  The only
> thing semi-useful that has come out of this whole thing is that it is
> finally encouraging people to declare what shell their scripts actually
> require.
>
> Pat
>



-- 
Michael Potter
Replatform Technologies, LLC
+1 770 815 6142
michael at potter.name