CODEWITHSUNDEEP
tcltk-toolkit
user1616295
user1616295

Reputation: 41

How to make Tcl interpreter source a file and open a pipe from shell command simultaneously?

Is there a way to make Tcl interpreter source a file and open a pipe from shell command parallel?

In more details, I have a GUI built from tcl/tk. I want my tcl script to source a setting file for GUI variables, and at the same time, open a pipe from [tclsh setting_file] to redirect the output to my GUI stdout.

Thank you very much!

Upvotes: 2

Views: 399

Answers (1)

Donal Fellows
Donal Fellows

Reputation: 137767

I'm not convinced that running the processing of the settings command in a subprocess is a good idea. Maybe a safe interpreter would be better?

Re trapping the output, you could pick a technique for doing stdout capture and then show the contents of the captured buffer in the GUI (after using encoding convertfrom to get the characters back if you're using my solution to that problem) but you've got a general issue that it is possible for user code to block things up if it takes a long time to run. You could work around that by using threads, but I suspect it is easier to avoid the complexity and to just let badly-written setup code cause problems that the user will have to fix. (The catch command can help you recover from any outright errors during the sourcing of the settings file.)

Upvotes: 2

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