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

[jaalto]

On 2012-03-01 09:05, Jim Meyering wrote:
| >     /dev/disk/by-uuid/492764a5-7506-4489-8fd0-82d0d284d627  6.0G  4.1G  
1.7G  72% /

| 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
|
| 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.

I'm glad to hear that next release addresses the problem somewhat.

However, from the commit it looks like it is only tackling the "uuid"
issue and not a general problem where:

    - Any mounted directory could be verly long

Although my bug report was primarily triggered by seeing the uuid
paths, I'd like to propose these options (-X, -r) to tackle a more
generic problem of:

     path first, calculations next on the same line

An example. I have other mounted directories that are *very* long:

   /mnt/extent/development/src/project/ ...

It's just not the "uuid" lines that are problematic.

Especially the --reverse option would solve lot of these long path
issues.

| > 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