Re: Conditionals in BASH

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Matthew Saltzman wrote:
The conditionals && and || in bash are short-circuit, so that once a
term is evaluated that determines the success or failure of the entire
expression, evaluation of the remaining alternatives is skipped.

In a test expression (enclosed in [ ... ]), are the conditionals -a and
-o also short-circuit?  The O'Reilly BASH book seems to suggest that
they are not, but the description seems to me to be ambiguous.
To my knowledge, all conditionals are evaluated left-to-right.  As
soon as one comparison fails, there is no need to evaluate the remainder
as the true-false condition has been met and the test is aborted with
a "false" result.  The only time the right-most comparison (or top level
comparison if nested) is evaluated is if all other comparisons are

- Rick Stevens, Systems Engineer                       [email protected] -
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