R Under development (unstable) (2023-11-16 r85542 ucrt) -- "Unsuffered Consequences"
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> library("R.utils")
Loading required package: R.oo
Loading required package: R.methodsS3
R.methodsS3 v1.8.2 (2022-06-13 22:00:14 UTC) successfully loaded. See ?R.methodsS3 for help.
R.oo v1.25.0 (2022-06-12 02:20:02 UTC) successfully loaded. See ?R.oo for help.

Attaching package: 'R.oo'

The following object is masked from 'package:R.methodsS3':

    throw

The following objects are masked from 'package:methods':

    getClasses, getMethods

The following objects are masked from 'package:base':

    attach, detach, load, save

R.utils v2.12.3 successfully loaded. See ?R.utils for help.

Attaching package: 'R.utils'

The following object is masked from 'package:utils':

    timestamp

The following objects are masked from 'package:base':

    cat, commandArgs, getOption, isOpen, nullfile, parse, warnings

> 
> message("*** systemR() ...")
*** systemR() ...
> 
> res <- systemR('--slave -e "cat(runif(1))"', intern=TRUE, verbose=TRUE)
System command: "D:/RCompile/recent/R/bin/x64/R" --slave -e "cat(runif(1))"
> cat("A random number: ", res, "\n", sep="")
A random number: 0.4069141
> 
> message("*** systemR() ... DONE")
*** systemR() ... DONE
> 
> 
> proc.time()
   user  system elapsed 
   0.29    0.04    0.81