system -notty what is it for?

[Ken Cunningham]

I noted here

https://github.com/macports/macports-base/blob/master/src/pextlib1.0/system.c <https://github.com/macports/macports-base/blob/master/src/pextlib1.0/system.c>

an option for system called “-notty”

Searching macports-ports seems to show no ports use this.

What would that option be useful for?

Thanks, K
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