[Emacs-bug-tracker] bug#7157: closed (df should default to -P if output is not a tty)

[GNU bug Tracking System]

Your message dated Thu, 24 Mar 2011 00:11:40 +0000
with message-id <address@hidden>
and subject line df no longer wraps lines
has caused the GNU bug report #7157,
regarding df should default to -P if output is not a tty
to be marked as done.

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-- 
7157: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=7157
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> --- Begin Message ---
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> Subject: 
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> df should default to -P if output is not a tty
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> Date: 
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> Mon, 04 Oct 2010 11:44:15 +0200
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> User-agent: 
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> Mozilla/5.0 (X11; U; Linux i686; en-US;	rv:1.9.2.9) Gecko/20100907 Fedora/3.1.3-1.fc13 Lightning/1.0b2	Thunderbird/3.1.3
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> Hello,
>
> We just had a case where an overfull disk went unnoticed by logwatch.
>
> The reason turned out to be its long device name (/dev/mapper
> /VolGroup00-LogVol00), which caused df to break the line, messing up
> the column count. Indeed, logwatch looks for the use% in the fifth
> field, but due to this line breaking, the use% for this disk ended up
> in the _fourth_ field of the next line instead.
>
> There is an option to prevent this behavior (-P), but apparently the
> logwatch authors were not aware of it. Understandably, I might say,
> because if their test cases happen to only have disks with short names,
> they'll never stumble upon this.
>
> So, in the name of the "principle of least surprise" wouldn't it be
> possible to make -P the default if the output is not a tty (and add an
> additional flag for those rare cases where this line-breaking behavior
> is actually wanted on non-tty's)
>
> Other utilities, such as Debian's dpkg -l, also default to this
> behavior (trimming lines to window width if output is a tty, and not
> trimming it if output is not a tty). Same thing for ls (column output
> on a tty, one file-name per line on non-tty)
>
> The problem was observed on version coreutils-8.4-8.fc13.i686:
>
> # df | cat
> Filesystem           1K-blocks      Used Available Use% Mounted on
> /dev/mapper/VolGroup00-LogVol00
>                       66688656  47463424  15782956  76% /
> /dev/cciss/c0d0p1       197546     19124    168223  11% /boot
> tmpfs                   517468        12    517456   1% /dev/shm
>
> Thanks,
>
> Alain
>
>
>
> --- End Message ---
> --- Begin Message ---
>
>
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> Subject: 
>
> df no longer wraps lines
>
>
>
>
> Date: 
>
> Thu, 24 Mar 2011 00:11:40 +0000
>
>
>
>
> User-agent: 
>
> Mozilla/5.0 (X11; U; Linux i686; en-US;	rv:1.9.1.8) Gecko/20100227 Thunderbird/3.0.3
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>
>
>
> Since I've just changed df to no longer split
> entries with long device names over two lines
> (since it now aligns columns consistently),
> I'm closing these.
>
> cheers,
> Pádraig
>
>
> --- End Message ---