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§ 4.151 - [sys] Built-In

Mnemonic aid: center

This provides a means to execute a system command.

If the command creates output, it will be incorporated into the output stream.

If the command encounters a problem, the stderr results will also be incorporated into the output stream.

If you wish to suppress the output of the command with regard to the output stream, execute it within a  [comment] ) and that will prevent the results from appearing.

Other built-ins used here:  [comment] )

As shell commands can present a significant security risk, there is a means to disable this capability when instantiating the class. If noshell=True then  [sys] ) does nothing:

mod = macro(noshell=True)
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on January 10th, 2026 at 2:38 MT
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