df: new option: --total to print grand totals

* src/df.c (add_uint_with_neg_flag): New function to add two integral
values with separate negation flag.
(show_dev): New parameter force_fsu to display numbers directly. Collect
summary statistics on each printed device.
(usage): Mention new option --total in --help.
(main): Initialize summary on program start. Handle new option --total.
* tests/df/total: Dummy test case for new --total option.
* tests/df/total-awk: Better test case for new --total option (requires
awk).
* doc/coreutils.texi: Mention new parameter --total.
* NEWS: Mention the change.
* TODO: Removed completed task.

1 files changed, 0 insertions, 2 deletions

diff --git a/TODO b/TODO
index 0321768af..da5e0ac33 100644
--- a/TODO
+++ b/TODO
@@ -72,8 +72,6 @@ Should printf '\0123' print "\n3"?
 
 printf: consider adapting builtins/printf.def from bash
 
-df: add `--total' option, suggested here http://bugs.debian.org/186007
-
 tail: don't use xlseek; it *exits*.
   Instead, maybe use a macro and return nonzero.