[R] function call

[vincent at 7d4.com]

Dear R-users,

When a function f1() is called, is there a way to know,
from inside the function f1(), if f1() is directly called from the
R console, or indirectly from another function f2() ?

Of course, I may add an argument to f1(..., callbyf2=FALSE) only used
by f2() giving explicitely this info, but I would like to know
if there may be a more generic way ?

Thanks for any info or pointer