bug#7176: Feature request: add option to display full units in -h and -- (original) (raw)

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From: Pádraig Brady
Subject: bug#7176: Feature request: add option to display full units in -h and --si output
Date: Fri, 08 Oct 2010 23:45:11 +0100
User-agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9.1.8) Gecko/20100227 Thunderbird/3.0.3

On 08/10/10 17:52, Mihai Capotă wrote:

The output of -h or --si looks identical (if K/k doesn't show up). It would be useful to be able to differentiate between the two by having the full units in the output, e.g., MiB and MB, respectively, instead of just M.

Actually, the manual [1] does say "si is similar [to h], but uses powers of 1000 and appends ‘B’", but that seems to be a bug, as a similar wording in the ls manual was corrected [2].

Maybe there's a way to generate this full-unit output with the existing options, but I don't see it. Specifying a unit in --block-size (e.g., "MiB or MB") results in everything being displayed only in that unit, not in the usage of the whole spectrum of units, as with -h and --si.

Also there is some inconsistency in how specified units are handled pb-laptop:$ BLOCKSIZE=1K df . Filesystem 1K-blocks Used Available Use% Mounted on /dev/sda5 5034364 4815560 167700 97% / pb-laptop:$ BLOCKSIZE=K df . Filesystem 1K-blocks Used Available Use% Mounted on /dev/sda5 5034364K 4815560K 167700K 97% / pb-laptop:$ BLOCKSIZE=Ki df . Filesystem 1K-blocks Used Available Use% Mounted on /dev/sda5 5034364 4815560 167700 97% / pb-laptop:$ BLOCKSIZE=KiB df . Filesystem 1KiB-blocks Used Available Use% Mounted on /dev/sda5 5034364KiB 4815560KiB 167700KiB 97% / pb-laptop:~$ BLOCKSIZE=k df . Filesystem 1K-blocks Used Available Use% Mounted on /dev/sda5 5034364K 4815560K 167700K 97% /

We must look into that.

I see two possible solutions:

(1) add a new flag, say --full-units (2) add two more options for --block-size, say "decimal" and "binary"

(3) get "1024" mode to always output the extra 'i' But that would mean ls -lh would output the 'i' by default, which I'm not sure is acceptable.

I think (2) is a good option.

Though in saying that, supporting this isn't that important I think, as the relative sizes are what's important given that the values are truncated in any case. So I'm 50:50 about making that change.

cheers, Pádraig.