Re: programs

[Matthew Woehlke]

Juhapekka Tolvanen wrote:
> On Fri, 08 Jan 2010, +06:42:05 EET (UTC +0200), Matthew Woehlke wrote:
> > Juhapekka Tolvanen wrote:
> > > On Thu, 31 Dec 2009, +14:51:44 EET (UTC +0200),
> > > Eric Blake pressed some keys:
> > >
> > > > According to Juhapekka Tolvanen on 12/30/2009 4:35 PM:
> > > > > I wanted to do this: Give sizes of each files and directories located
> > > > > in $PWD in human-readable-format AND sort output according to sizes of
> > > > > those files and directories.
> > > >
> > > > What's wrong with:
> > > >
> > > > du -sh0 * | sort -hz | tr '\0' '\n'
> > > >
> > > > besides needing coreutils 7.5 or newer?
> > >
> > > What if size of one directory is rounded UP to 1M and size of other
> > > directory is rounded DOWN to 1M? How sort-command can know know, which
> > > one is bigger? I am sure, that sorting must be done according to size
> > > in bytes, not according to size of human-readable units.
> >
> > Okay. What is wrong with:
> >
> > du -B 1 -s -0 * \
> >    | sort -nz \
> >    | awk -v RS='\0' '{print $2}' \
> >    | xargs -d '\0' du -sh
> >
> > ?
>
> It does not work for me:

Meh, guess I should try it. Should be:

du -B 1 -s -0 * \
    | sort -nz \
    | awk -v RS='\0' '{printf "%s\0", $2}' \
    | xargs -0 du -sh

But that doesn't work when files have spaces in them. (I took the '$2' 
from your original script, btw.)

You'd do better to replace the bits after 'sort' with:

awk -v RS='\0' '{
   if ( $1>  0x3F000000 )
     printf "%6.1fG\t", $1 / 0x40000000 ;
   else if ( $1>  0xF0000 )
     printf "%6.1fM\t", $1 / 0x100000 ;
   else if ( $1>  0x300 )
     printf "%6.1fK\t", $1 / 0x400 ;
   else
     printf "%6i\t", $1 ;
   $1="" ;
   print $0 ;
}'

This should output the file names without any sort of mangling (I 
think), but even if it does, it's just output at this stage; you aren't 
trying to re-stat the files, so you won't get errors even if mangling 
occurs.

> How that awk-snippet is actually used? Can you provide it as a
> shell-script-file?

You pipe 'du's output into it, i.e. 'du <args> | sort -nz | <snippet>'.

The attached script acts like 'du -h' with sorted output; some arguments 
might mess it up but generally you can pass other 'du' arguments to it 
(and of course file names).

--
Matthew
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sdu
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