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

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* 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.
This commit is contained in:
Kamil Dudka
2008-09-03 10:33:06 +02:00
committed by Jim Meyering
parent ef6a361a07
commit ea2887bbe4
8 changed files with 208 additions and 8 deletions
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doc/coreutils.texi
+7
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@@ -9692,6 +9692,13 @@ pseudo-file-systems, such as automounter entries.
Scale sizes by @var{size} before printing them (@pxref{Block size}).
For example, @option{-BG} prints sizes in units of 1,073,741,824 bytes.
@itemx --total
@opindex --total
@cindex grand total of disk size, usage and available space
Print a grand total of all arguments after all arguments have
been processed. This can be used to find out the total disk size, usage
and available space of all listed devices.
@optHumanReadable
@item -H