[R-SIG-Mac] Disable readline echo in R for mac GUI

Dr Eberhard W Lisse el @ending from li@@e@n@
Thu Nov 15 14:49:09 CET 2018

On my Mojave iMac



on RStudio

	[1] "RStudio"	"--interactive"

on Mac GUI

	[1] "R"	"--no-save"	"--no-restore-data" "--gui=aqua"

and on R command line

	[1] "/Library/Frameworks/R.framework/Resources/bin/exec/R"

so maybe test for that?


On 15/11/2018 15:06, Jeroen Ooms wrote:
> When prompting the user for a password, we need to temporarily disable
> echo. In a tty we can call posix stty -echo (example below). The
> RStudio GUI has a native password entry function that can be triggered
> via getOption('askpass'). Is there simple method to prompt for a
> password in the R for Mac GUI (without depending on shiny or tcltk)?
> readline_password <- function(prompt = "Please enter password\n"){
>   if(isatty(stdin())){
>     if(system('stty -echo') == 0){
>       on.exit(system('stty echo'))
>     }
>   }
>   base::readline(prompt)
> }

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