Re: Unix variable question

It's parameter substitution.

Use the first one if not null, otherwise use the second.

Try this:

> TEST=${ORACLE_HOME:-NOT SET}
> echo $TEST

Now try misspelling ORACLE_HOME

> TEST=${ORACLE_JOME:-NOT SET}
> echo $TEST

In a script you may have to begin the line with a colon.

e.g. : TEST=${ORACLE_HOME:-NOT SET}

Jared

On Tuesday 25 February 2003 01:28, Sinardy Xing wrote:
> Hi all,
>
> Can someone help me understand this...
>
> ROOT # TEST=${2:-.}
> ROOT # echo $TEST
> ROOT #.
>
> what is 2:-.
>
>
> another similar code
>
> ROOT # TEST=${1:-0}
> ROOT # echo $TEST
> ROOT # 0
>
>
>
> they looks like emoticon for me
>
> Thank you
>
> Sinardy

-- 
Please see the official ORACLE-L FAQ: http://www.orafaq.net
-- 
Author: Jared Still
  INET: jkstill_at_cybcon.com

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