what is safe-tcl?
fish
what is safe-tcl?? and when or why should I use it??
where can I get more information about this??
thanks!
Steve Ball
Safe-Tcl is a scheme to allow untrusted Tcl scripts to be evaluated
without the danger of that script "damaging" the local computing environment
is some way (eg. by issuing the command 'exec rm -rf *').
Safe-Tcl has been incorporated into Tcl 7.5. Using the interp command, you
can create new interpreters in a Tcl application which have a completely
separate namespace. In addtion, you can make an interpreter 'safe'.
The man page interp(n) gives more details.
Safe-Tcl is used whenever you want to execute a piece of Tcl code which may
have harmful side-effects. For example, there are active e-mail applications
which allow Tcl scripts to be attached to mail messages. Also, my WWW browser,
SurfIt!, uses safe interpreters to execute downloaded Tcl scripts to
implement Web applets.
BTW, SurfIt! also includes a prototype for Safe-Tk, which does for Tk what
Safe-Tcl does for Tcl.
For more information see interp(n), and:
Borenstein, N. EMail with a Mind of its Own: The Safe-Tcl Language for Enabled
Mail. In Proceedings of ULPAA. 1994.
On-line version is at:
http://minsky.med.virginia.edu/sdm7g/Projects/Python/safe-tcl/ulpaa-94.ps.gz
see also
http://minsky.med.virginia.edu/sdm7g/Projects/Python/safe-tcl/safe-tcl.ps.gz
Cheers,
Steve Ball, ANU
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Darren New
> what is safe-tcl?? and when or why should I use it??
> where can I get more information about this??
> thanks!
SafeTcl, in it's current form, is a version of the Tcl interpreter that
provides a trusted half in which untrusted programs can be run.
It's used for "enabled email," much like Java is used for "enabled web
pages."
If you are writing to ask about Safe-Tcl, you can retrieve an overview
paper, full specs, documentation, working implementation, and examples
from:
URL ftp://ftp.fv.com/pub/code/other/safe-tcl.tar The overview
paper alone can be found in:
URL ftp://ftp.fv.com/pub/nsb/safe-tcl-ulpaa-94.{txt,ps} Or consult
the the mailing list:
safe-tcl[-request]@cs.utk.edu.
-- Darren
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Larry W. Virden
I thought Safe Tcl was a part of Tcl 7.5 now?
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