bug#10915: 8.13: df -- overly long output lines are very hard to read

[Jim Meyering]

Jari Aalto wrote:
> With long path names, the output is very hard to read because each line is
> so long:
>
>     $ df -Hl
>
>     Filesystem                                              Size  Used Avail 
> Use% Mounted on
>     rootfs                                                  6.0G  4.1G  1.7G  
> 72% /
>     udev                                                    192M     0  192M  
>  0% /dev
>     tmpfs                                                    40M  1.5M   38M  
>  4% /run
>     /dev/disk/by-uuid/492764a5-7506-4489-8fd0-82d0d284d627  6.0G  4.1G  1.7G  
> 72% /
...

Thank you for the report and suggestions.
That has been addressed:

Lots of discussion:
  http://thread.gmane.org/gmane.comp.gnu.coreutils.general/2026

Here's the commit that fixed it:
  http://git.sv.gnu.org/cgit/coreutils.git/commit/?id=1e18d8416f9ef43bf0

> SUGGESTIONS
>
> (1) Add exclude to option to filter out items from the display, thus
> calculating the line-up column better.
>
>         -X, --exclude PATTERN
>
>     Where patterns could be preferably EREGEXP (best), or in the initial
>     implementation a simple STRING to match.
>
>     df -HlX by-uuid
>
>     $ df -Hl
>
>     Filesystem      Size  Used Avail Use% Mounted on
>     rootfs          6.0G  4.1G  1.7G  72% /
>     udev            192M     0  192M   0% /dev
>     tmpfs            40M  1.5M   38M   4% /run
>     tmpfs           5.3M     0  5.3M   0% /run/lock
>     tmpfs            79M  7.9M   71M  10% /tmp
>     tmpfs            79M     0   79M   0% /run/shm
>     /dev/sdb1        18G  8.1G  8.3G  50% /mnt/extent
>     /dev/sdb1        18G  8.1G  8.3G  50% /usr/src
>     /dev/sdb1        18G  8.1G  8.3G  50% /root/vc
>
> (2) Also add option to reverse the output to see the values first (most
> important) in a full display:
>
>         -r, --reverse
>
>     $ df -Hlr
>
>     Size  Used Avail Use% Mounted-on Filesystem
>     6.0G  4.1G  1.7G  72% /             rootfs
>     192M     0  192M   0% /dev          udev
>      40M  1.5M   38M   4% /run          tmpfs
>     6.0G  4.1G  1.7G  72% /             
> /dev/disk/by-uuid/492764a5-7506-4489-8fd0-82d0d284d627
>     5.3M     0  5.3M   0% /run/lock     tmpfs
>      79M  7.9M   71M  10% /tmp          tmpfs
>      79M     0   79M   0% /run/shm      tmpfs
>     6.0G  4.1G  1.7G  72% /srv/cante.src 
> /dev/disk/by-uuid/492764a5-7506-4489-8fd0-82d0d284d627
>     6.0G  4.1G  1.7G  72% /srv/cante.tmp 
> /dev/disk/by-uuid/492764a5-7506-4489-8fd0-82d0d284d627
>      18G  8.1G  8.3G  50% /mnt/extent   /dev/sdb1
>      18G  8.1G  8.3G  50% /usr/src      /dev/sdb1
>      18G  8.1G  8.3G  50% /root/vc      /dev/sdb1

Thanks for the suggestions.
Adding --exclude is another way to work around the duplicate
entry problem, but I'd prefer to wait a (possibly long) while,
for a solution that fixes the underlying problem.