Alexander L Belikoff <[EMAIL PROTECTED]> writes:
> Package: lintian
> Version: 1.23.22
> Severity: normal
> Currently, lintian reports the shell construct 'if [[ ... ]]' as
> bashism. I am not sure this is correct, since all POSIX 1003.2 resources
> available to me declare '[[' and ']]' a standard conditional expression
> check in POSIX sh (don't confuse with older Bourne sh).
Nope. [[ and ]] indicate built-in test evaluation, which is not a
required feature of a POSIX shell. See:
<http://www.opengroup.org/onlinepubs/009695399/utilities/xcu_chap02.html>
and observe that [[ and ]] are mentioned only in the following text:
The following words may be recognized as reserved words on some
implementations (when none of the characters are quoted), causing
unspecified results:
[[ ]] function select
So the behavior of [[ and ]] is unspecified in a pure POSIX shell.
If you want to use [[ or ]], you need to use #!/bin/bash or some
equivalent.
--
Russ Allbery ([EMAIL PROTECTED]) <http://www.eyrie.org/~eagle/>
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