use of "input" in system()
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