[ale] SOLUTION Re: Keep space separated values sane in a bash "for" loop?
Jerry Yu
jjj863 at gmail.com
Mon Apr 9 23:48:32 EDT 2007
The answer is as simple as "find . -maxdepth 1 -mindepth 1 -type d -print0 |
xargs -0 du -sh", without the two extra sed parsing attempts. That was my
initial answer on Apr 5. It even worked on my cygwin port of
bash/find/xargs/du.
/home/jerry/1# find . -maxdepth 1 -mindepth 1 -type d -print0 | xargs -0 du
-sh
0 ./ leading space
8.0K ./1 4
0 ./1 4 8
8.0K ./trailing space
On 4/9/07, Christopher Bergeron <christopher at bergeron.com > wrote:
>
> Jerry - I appreciate your input, but your solution does not work as I
> described it. James' solution works; however it doesn't work in an
> alias as he described.
>
> Your solution:
> find . -maxdepth 1 -mindepth 1 -type d -print0 | sed 's/\ /\\ /g'|sed
> 's/.\///'| xargs -0 du -sh
> does not work as you purported, however, I do appreciate your suggestion.
>
> Kind regards,
> CB
>
>
>
>
> Jerry Yu wrote:
> > your missed the -print0 for find and -0 for xargs. This combo uses
> > NULL to separate fields. Check out my initial reply as well as James's.
> >
> > On 4/9/07, *Christopher Bergeron* <christopher at bergeron.com
> > <mailto:christopher at bergeron.com>> wrote:
> >
> > Aha!
> > James, I think you've _mostly_ solved my problem. I used your
> > cmdline
> > (which works), however, it didn't work the way I was applying
> > it: as an
> > alias!
> >
> > For example:
> > find . -maxdepth 1 -mindepth 1 -type d | sed 's/\ /\\ /g'|sed
> > 's/.\///'|xargs du -sh == works perfectly
> >
> > however...
> >
> > alias diskpie="find . -maxdepth 1 -mindepth 1 -type d | sed 's/\ /\\
> > /g'|sed 's/.\///'|xargs du -sh" == does not work
> >
> > I have it feeling it has something to do with escaping the quotes,
> but
> > I'm surprised that alias mungs the string it runs (actually, I'm not
> > really surprised)...
> >
> > Kind regards,
> > CB
> >
> >
> >
> >
> >
> >
> > James P. Kinney III wrote:
> > > On Mon, 2007-04-09 at 18:11 -0400, Christopher Bergeron wrote:
> > >
> > >> This solution doesn't work with "du" for some reason.
> > >>
> > >> #!/bin/bash
> > >> oldifs=$IFS
> > >> export IFS=","
> > >> for i in `ls -m|sed 's/, /,/g'`
> > >> do
> > >> du -sH \"$i\"
> > >> done
> > >> export IFS=$oldifs
> > >>
> > >> It appears its turning all of the elements $i into a single
> > variable.
> > >>
> > >> This code demonstrates:
> > >>
> > >> #!/bin/bash
> > >> oldifs=$IFS
> > >> export IFS=","
> > >> for i in `ls -m|sed 's/, /,/g'`
> > >> do
> > >> echo du -sh \"$i\"
> > >> done
> > >> export IFS=$oldifs
> > >>
> > >>
> > >> What I'm trying to do is create a script that will do "du -sh"
> > on each
> > >> directory listed in the current directory. This is what I have
> > so far:
> > >>
> > >> alias diskpie='for i in `\ls -l | grep drwx | tr -s " " | cut
> > -f9 -d "
> > >> "`; do du -sh $i; done'
> > >>
> > >> It works great unless it encounters a directory with a space in
> > the name.
> > >>
> > >> Anyone have any other ideas?
> > >>
> > >>
> > >
> > > find . -maxdepth 1 -mindepth 1 -type d | sed 's/\ /\\ /g'|sed
> > 's/.\///'|
> > > xargs du -sh
> > >
> > >
> > >> Kind regards,
> > >> Chris
> > >>
> > >>
> > >>
> > >>
> > >>
> > >>
> > >>
> > >>
> > >> Robert Story wrote:
> > >>
> > >>> On Fri, 6 Apr 2007 12:18:08 -0400 Robert wrote:
> > >>> RS> On Thu, 5 Apr 2007 20:13:06 -0400 aaron wrote:
> > >>> RS> A> Here's technique that might help. I whipped this up for
> > dealing with
> > >>> RS> A> spaced names common to audio file that I wanted to
> > batch convert
> > >>> RS> A> to mp3. Works with bash on Mac -- should work with
> > Linux bash as
> > >>> RS> A> well. The trick was to pipe the file listing to READ
> > from STDIN instead
> > >>> RS> A> of letting a FOR loop parse the input:
> > >>> RS>
> > >>> RS> This works great for embedded spaces, but not so much for
> > spaces at the
> > >>> RS> beginning or end of a file name...
> > >>>
> > >>>
> > >>> I've had this same problem for a while, and have always done
> > manual clean-up.
> > >>> After trying these solutions and reading the ls man page, I
> > now have a working
> > >>> solution that handles spaces anywhere in the name.
> > >>>
> > >>> #!/bin/bash
> > >>> oldifs=$IFS
> > >>> export IFS=","
> > >>> for i in `ls -m|sed 's/, /,/g'`
> > >>> do
> > >>> echo \"$i\"
> > >>> done
> > >>> export IFS=$oldifs
> > >>>
> > >>>
> > >>> Of course, the above will break for files with a ',' in them,
> > but I can live
> > >>> with that... the paranoid could add an initial ls|grep to
> > check and warn for
> > >>> that case...
> > >>> _______________________________________________
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> > >>>
> > >>>
> > >>>
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