Shell scripting - suppressing and eliminating error messages

[Oliver Fromme]

Paul Schmehl wrote:
 > --On Tuesday, May 20, 2008 17:36:26 -0500 Paul Schmehl <pauls at utdallas.edu> 
 > wrote:
 > > if ( ${BATCH} ); then
 > > [...]
 > > 1: not found
 > 
 > Never mind....forgot to use [ ] for test instead of ( ).

If the value of $BATCH is always either 0 and 1, a neat
trick is to define two shell functions:

0() { false; }
1() { true; }

Then you can savely write:

if ( $BATCH ); then

Or even:

if $BATCH; then

Best regards
   Oliver

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