[R] use of "input" in system()

[Wacek Kusnierczyk]

Wacek Kusnierczyk wrote and forgot to add references:
>
> it doesn't seem to be the usual way of explaining the matters.  the bash
> reference manual [1, sec. 3.6.1] (see also man bash) says:
>   

[1] http://www.gnu.org/software/bash/manual/bashref.html

>
> in peters' expert shell scripting [2, ch. 9, p. 60] it is stated:
>   

[2] Ron Peters, Expert Shell Scripting, Apress 2009

vQ