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[bug #36452] xargs needs "-I" (eye) last ...

From: Kevin
Subject: [bug #36452] xargs needs "-I" (eye) last ...
Date: Fri, 11 May 2012 17:16:29 +0000
User-agent: Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/535.19 (KHTML, like Gecko) Chrome/18.0.1025.168 Safari/535.19


                 Summary: xargs needs "-I" (eye) last ...
                 Project: findutils
            Submitted by: dalecosp
            Submitted on: Fri 11 May 2012 05:16:28 PM GMT
                Category: xargs
                Severity: 3 - Normal
              Item Group: Wrong result
                  Status: None
                 Privacy: Public
             Assigned to: None
         Originator Name: 
        Originator Email: 
             Open/Closed: Open
         Discussion Lock: Any
                 Release: 4.4.2
           Fixed Release: None



I ran an xargs(1) command in the BSD implementation with success and posted
the result at [url=http://board.phpbuilder.com/board/showthread.php?t=10384409
 PHPBuilder].  Lo & behold, it didn't work in a seven-year old version of GNU
xargs(1) ... unless we changed the invocation to put "-I" last, before

On GNU IRC's #gnu, user leo_rockway tested with findutils version 4.4.2, which
appears to be the latest available on most(?) public
[url=http://ftp.gnu.org/pub/gnu/findutils/ FTP sites].

To recap, this works in a non-GNU xargs(1) implementation:

find . -type f -print0 | xargs -I {} -0 -L 1 convert -compress JPEG -quality
75 {} {}

However, with GNU xargs(1) <=4.4.2, this results in convert complaining:

unable to open image `{}': @ error/blob.c/OpenBlob/2489.
missing an image filename `./gnu+linux.png' @

Changing the invocation of GNU xargs(1) to this:

find . -type f -print0 | xargs -0 -L 1 -I {} convert -compress JPEG -quality
75 {} {}

Allows convert to function normally and complete the command (i.e. it gets the
correct arguments).  The only difference seems to be the location of the "-I"

I do apologize if this has been fixed since 4.4.2 --- I see that several other
'releases' seem to be in the *Fixed Release* selector, but, as I mentioned, I
don't see them on the public FTP sites.  I'm a bit of a "newb" where GNU/Linux
are concerned, having spent years with the BSD family of OSen.  Thanks for
your time and contributions.


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