tcl question: Exec

[Joel Hammer]

I want to test if a file exists using tcl by calling linux (bash) functions.

These commands give the following:

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set d [ exec echo OK]
This sets d to OK
======================

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set d 0
set d [ exec \[ -e /home/jlh/junk \] ]
The second command resets d to null.
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set d [ exec \[ -e /home/jlh/junk \] && echo OK ]
This command fails with a missing bracket error.
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I would like to know why the last command fails.

Any insight appreciated,

Joel