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 Forum index » Off-Topic Area » Programming
Simple "find" command problem.
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sunburnt


Joined: 08 Jun 2005
Posts: 4006
Location: Arizona, U.S.A.
PostPosted: Wed 21 Dec 2011, 03:36    Post subject:  Simple "find" command problem.  
I downloaded 6 missing libraries for ffmpeg and wanted to undeb all of them.

Tried these commands as find`s help said, both errored the same:
Code:
sh-4.1# find /mnt/sdb3/deb_bin/ffmpeg_i386 -name lib*.deb -exec undeb
find: missing argument to `-exec'

sh-4.1# find /mnt/sdb3/deb_bin/ffmpeg_i386 -name lib*.deb -exec undeb {}
find: missing argument to `-exec'
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jpeps

Joined: 31 May 2008
Posts: 2422
PostPosted: Wed 21 Dec 2011, 04:00    Post subject:  
Is it finding libs to undeb?

Code:

sh-4.1# find /mnt/sdb3/deb_bin/ffmpeg_i386 -name lib*.deb



edit: Yeah.... -exec doesn't seem to work


| xargs [command] works
Last edited by jpeps on Wed 21 Dec 2011, 04:19; edited 2 times in total
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jpeps

Joined: 31 May 2008
Posts: 2422
PostPosted: Wed 21 Dec 2011, 04:01    Post subject:  
duplicate post
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technosaurus


Joined: 18 May 2008
Posts: 3843
PostPosted: Wed 21 Dec 2011, 04:33    Post subject:  
Code:
for x in `find ...`;do
somethingto $x
done

replace the ... with whatever finds your files
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Karl Godt


Joined: 20 Jun 2010
Posts: 2689
Location: Kiel,Germany
PostPosted: Wed 21 Dec 2011, 08:32    Post subject:  
Quote:
find /mnt/sdb3/deb_bin/ffmpeg_i386 -name lib*.deb -exec undeb {}

Code:
find /mnt/sdb3/deb_bin/ffmpeg_i386 -name lib*.deb -exec undeb {} \; -exec echo {} \; -exec ls -l {} \;

I know from amigo .
I read on the net also to '{}' single quote or doubble quote the curved brackets .
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jpeps

Joined: 31 May 2008
Posts: 2422
PostPosted: Wed 21 Dec 2011, 12:30    Post subject:  
Strange---nothing worked yesterday re "-exec", today everything works..quoted or non-quoted.
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Pizzasgood


Joined: 04 May 2005
Posts: 6270
Location: Knoxville, TN, USA
PostPosted: Wed 21 Dec 2011, 13:21    Post subject:  
The error in the OP is that it needs either a \; or a \+ at the end of the -exec argument (as well as the {}). That's how find knows where the end is. The difference between \; and \+ is that with \; it runs the command once per find, whereas with \+ it combines the results into one command.

Code:
find /mnt/sdb3/deb_bin/ffmpeg_i386 -name lib\*.deb -exec undeb {} \;

#equivalent to:

undeb /mnt/sdb3/deb_bin/ffmpeg_i386/libCooper.deb
undeb /mnt/sdb3/deb_bin/ffmpeg_i386/libMarla.deb
undeb /mnt/sdb3/deb_bin/ffmpeg_i386/libStuart.deb
undeb /mnt/sdb3/deb_bin/ffmpeg_i386/libVal.deb


Code:
find /mnt/sdb3/deb_bin/ffmpeg_i386 -name lib\*.deb -exec undeb {} \+

#equivalent to:

undeb /mnt/sdb3/deb_bin/ffmpeg_i386/libCooper.deb /mnt/sdb3/deb_bin/ffmpeg_i386/libMarla.deb /mnt/sdb3/deb_bin/ffmpeg_i386/libStuart.deb /mnt/sdb3/deb_bin/ffmpeg_i386/libVal.deb


Also, it's a good idea to escape or quote name arguments that have asterisks, so that the shell doesn't try to expand them before sending them to find. Otherwise if you have any files in the local directory that match the name pattern, your name option will be expanded into them before being sent to find, which is probably not what you want.

The code technosaurus posted will work as long as the filenames don't have spaces in them. If there are spaces, it is better to use the -exec argument of find. Using -exec with the \+ can also be more efficient than a for loop, depending on what you're doing.
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sunburnt


Joined: 08 Jun 2005
Posts: 4006
Location: Arizona, U.S.A.
PostPosted: Wed 21 Dec 2011, 17:39    Post subject:  
Thanks everyone...

Pizzasgood; I seem to recall ( I think ) amigo telling me this awhile back.

Note: I thought once I tried multiple files with undeb and it didn`t work.

# I see you`re a fan of Dune Pizzasgood. The original or the remake?

Added it to my code snips.
The code snips file is getting pretty long, time for a snips/clips manager.
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Pizzasgood


Joined: 04 May 2005
Posts: 6270
Location: Knoxville, TN, USA
PostPosted: Mon 26 Dec 2011, 13:22    Post subject:  
I don't think I've ever tried undeb on multiple files.

I'm a fan of the books. Haven't gotten around to watching the movie yet. It's on my list of movies to watch sometime.
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sunburnt


Joined: 08 Jun 2005
Posts: 4006
Location: Arizona, U.S.A.
PostPosted: Mon 26 Dec 2011, 15:18    Post subject:  
The original with Kyle MacLaughlin is my favorite, but hard to find.

The remakes; Dune, and Children of Dune are very good also.
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