CODEWITHSUNDEEP
rascal
josh
josh

Reputation: 1554

Executing built-in commands

I would like to execute an external program from inside a Rascal program without creating a new process using createProcess() and killProcess(). Is this possible or have I missed something in the documentation?

Thanks.

Upvotes: 1

Views: 76

Answers (2)

Jurgen Vinju
Jurgen Vinju

Reputation: 6696

It's a matter of calling the readEntireStream function:

rascal>readEntireStream(createProcess("ls", ["-l","-a"]))
str: "total 192drwxr-xr-x@ 5 jurgenv  admin    170 Mar 24 21:10 .drwxr-xr-x@ 5 jurgenv  admin    170 Mar  3 20:05 ..-rwxr-xr-x  1 jurgenv  admin  25160 Feb  4 18:43 eclipse-rw-r--r--@ 1 jurgenv  admin    637 Apr  3 13:58 eclipse.ini-rw-r--r--  1 jurgenv  admin  64679 Mar 24 21:10 hs_err_pid25121.log"

Upvotes: 1

Paul Klint
Paul Klint

Reputation: 1406

If you mean by "execute a command": execute a command of the Operating System you are running on, then the answer is no this not possible. OS commands are always executed in a separate process. Can you give an example of your use case?

Upvotes: 0

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