Re: Unix variable question

From: Sergey V Dolgov <dsv_at_pptus.oilnet.ru>
Date: Tue, 25 Feb 2003 02:49:34 -0800
Message-ID: <F001.005582B1.20030225024934@fatcity.com>

Hello Sinardy,

Tuesday, February 25, 2003, 3:28:42 PM, you wrote:

SX> Hi all,

SX> Can someone help me understand this...

SX> ROOT # TEST=${2:-.}
SX> ROOT # echo $TEST
SX> ROOT #.

SX> what is 2:-.

The construction ${A:-B} is just like oracle nvl function. If variable A is defined and not null then result is A else B.

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Best regards,

 Sergey                            mailto:dsv_at_pptus.oilnet.ru

 ICQ 160079606
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Author: Sergey V Dolgov
  INET: dsv_at_pptus.oilnet.ru

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