OT: sed + exit status

[Robert Huff]

	According to the man page:

EXIT STATUS
     The sed utility exits 0 on success, and >0 if an error occurs.


	However, what constitutes "success" is undefined.
	Consider the sed command

	s/FOO/bar/

	.  Is sed "successful" is there are no instances of FOO?  Or
only if there is at least one instance of FOO and it is successfully
replaced by bar?

	Respectfully,


					Robert Huff