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From: emrefan on 9 Feb 2010 23:20

Can anybody tell me the difference between the two sciptlets (assuming
the shell is korn shell) below:

scriplet 1:

[[ -f somefile-that-surely-exists && ! otherfile -ot otherfile ]] &&
echo expected behavior

scriplet 2:

if [[ -f somefile-that-surely-exists ]]; then
if [[ ! otherfile -ot otherfile ]]; then
echo expected behavior
fi
fi

I thought since the same file was compared by the "-ot" operator, the
expression "! otherfile -ot otherfile" was sure to return true, so I
expected to see "expected behavior" with scriptlet 1. Not so.
Scriptlet 2 worked as expected. But, can anybody explain why?
From: Icarus Sparry on 9 Feb 2010 23:29
On Tue, 09 Feb 2010 20:20:47 -0800, emrefan wrote:

> Can anybody tell me the difference between the two sciptlets (assuming
> the shell is korn shell) below:
>
> scriplet 1:
>
> [[ -f somefile-that-surely-exists && ! otherfile -ot otherfile ]] &&
> echo expected behavior
>
> scriplet 2:
>
> if [[ -f somefile-that-surely-exists ]]; then
> if [[ ! otherfile -ot otherfile ]]; then
> echo expected behavior
> fi
> fi
>
> I thought since the same file was compared by the "-ot" operator, the
> expression "! otherfile -ot otherfile" was sure to return true, so I
> expected to see "expected behavior" with scriptlet 1. Not so. Scriptlet
> 2 worked as expected. But, can anybody explain why?

Scriptlet 1 works for me ( /etc/password exists here).

$ [[ -f /etc/passwd && ! /etc/passwd -ot /etc/passwd ]] && echo good
good
$ echo ${.sh.version}
Version JM 93t+ 2009-05-01
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