tcl question: Exec

[Roger Oberholtzer]

In your examples, you never told exec what to run. It would be looking
for a command called '[' somewhere in your path. '[' is the shell's
builtin version of the 'test' command. So, you would really want to be
running 'test', not 'sh' or '['.

As I wrote in another post, use the tcl 'file' command to manipulate
files and directories. It saves lots of headache. No need to exec a
command.


On Sun, 2003-12-28 at 22:08, Joel Hammer wrote:
> I want to test if a file exists using tcl by calling linux (bash) functions.
> 
> These commands give the following:
> 
> ======================
> set d [ exec echo OK]
> This sets d to OK
> ======================
> 
> =====================================
> set d 0
> set d [ exec \[ -e /home/jlh/junk \] ]
> The second command resets d to null.
> ======================================
> 
> ================================================
> set d [ exec \[ -e /home/jlh/junk \] && echo OK ]
> This command fails with a missing bracket error.
> =================================================
> 
> I would like to know why the last command fails.
> 
> Any insight appreciated,
> 
> Joel
> 
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