Re: [LTP] [PATCH] Convert if [[ -z $var ]] to if [ -z $var ]

[Dan K. <da...@ke...>]

Manoj Iyer wrote:
> You have a very valid point here, I subscribe to the same view point 
> that everything should be standard complient POSIX or otherwise. I am 
> running into some similar problems myslef! In fact the quick and "ugly" 
> fix to my problem is to have a staticly linked bash on my system. Also 
> another problems I am facing is that ash does not support functoins very 
> well.
> 
> Most often programs written in shell script use awk, sed etc, on 
> embedded systems these commands may not be available, so is there an 
> acceptable minimum set of support commands & utilities in the embedded 
> community??
> 
> If we can lay out the ground rules now it will be easy for any furure 
> development.
> 
> In fact I have a ton of tests (shell scripts) heavily tied to bash that 
> I plan to drop in the near  future. Clearly these will break on your 
> system like it is breaking on mine. :-)

I wish I really knew what the "right" way to procede was.
Pragmatically, if we had a reference posix shell we could
all test with (that had no extensions), that would help quite a bit;
then the scripts would run on any posix-compliant shell.

I'm afraid the only thing I can suggest is that we use busybox
(with all optional features enabled) as an approximation of
a minimal posix environment.  It does support a small awk and sed,
I think, though I haven't really checked.  I may get more into
this as I continue to coax LTP to run well on my systems.

In case anyone thinks I'm dissing bash, really, I'm not.  I love bash.

Hey, one other environment that uses ash is Cygwin.  Anyone tried
running LTP on Cygwin?  It'd be cool if that passed...
- Dan


-- 
Dan Kegel
http://www.kegel.com
http://counter.li.org/cgi-bin/runscript/display-person.cgi?user=78045