Date: Tue, 17 Feb 2004 11:00:07 -0500 (EST) From: Dru <dlavigne6@sympatico.ca> To: Erik Trulsson <ertr1013@student.uu.se> Cc: questions@freebsd.org Subject: Re: copying files with same name Message-ID: <20040217105935.D629@genisis.domain.org> In-Reply-To: <20040217154814.GA46529@falcon.midgard.homeip.net> References: <20040216163818.R609@genisis.domain.org> <20040217100421.R629@genisis.domain.org> <20040217154814.GA46529@falcon.midgard.homeip.net>
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On Tue, 17 Feb 2004, Erik Trulsson wrote:
> On Tue, Feb 17, 2004 at 10:16:18AM -0500, Dru wrote:
> > On Mon, 16 Feb 2004, Erik Trulsson wrote:
> >
> > > On Mon, Feb 16, 2004 at 04:49:37PM -0500, Dru wrote:
> > > >
> > > > Okay, I must be missing something obvious here. How do you do a batch copy
> > > > while renaming the destination files? I want to copy all of the configure
> > > > scripts in /usr/ports to ~/scripts. I can get find to find the files, I
> > > > can get sed to rename them, but I can't get the timing down right.
> > > >
> > > > cp -v `find /usr/ports -name configure -print | sed 's:/:=:g'` .
> > > >
> > > > renames the files nicely (so they're not all named configure), but does it
> > > > too soon--the source no longer exists.
> > > >
> > > > cp -v `find /usr/ports -name configure -print -exec sed 's:/:=:g' {} \;` .
> > > >
> > > > gives a syntax error (missing }) and
> > > >
> > > > cp -v `find /usr/ports -name configure -print | sed 's:/:=:g'` .
> > > >
> > > > has sed complain of extra characters at the end of a p command, followed
> > > > by all my destination files being named configure.
> > > >
> > > > Is there a way to do this as a one-liner, or does one have to write a
> > > > shell script with a while loop?
> > >
> > > First you should note that there are two ways of using cp(1).
> > > The first one is of teh form 'cp src-file dst-file' and the second one
> > > is of the form 'cp src-file1 src-file2 src-file3 ... dstdir'
> > > So if you don't want the dest-file to have the same name as the source,
> > > you must invoke cp(1) once for each file.
> > >
> > > You will have to use some kind of loop to do this. A for loop iterating
> > > over the output of find(1) would seem to be better suited for this
> > > problem than a while loop.
> >
> >
> > Well, I played some more and piping to cpio did the trick. I couldn't do
> > it in one go as pass mode doesn't support the interactively rename switch,
> > but a temporary copy out followed by an interactive copy in worked.
> >
> > I then tried pax -rwi which was even more efficient as it let me rename
> > while find was creating the list.
>
> Doing the renaming interactively sounds a bit cumbersome if there are
> many files.
>
> The following for-loop ought to do the trick nicely and doesn't require
> any interactive actions:
> (Assuming you have want to name the destination files as your examples
> above indicate, and also assuming you want to copy the files to the
> current directory.)
>
> for i in `find /usr/ports -name configure -print`
> do
> cp $i ./`echo $i | sed 's:/:=:g'`
> done
>
>
> You could either put that in a shell-script or type it in directly at
> the commandline. It works with both /bin/sh and zsh, and ought to work
> with bash and ksh as well.
>
> The above for-loop is actually a bit inefficient since it doesn't
> start to do any copying until after find has found all the files to be
> copied, and this can also give a very long command-line after the
> expansion of find's output which might cause trouble.
>
> An better alternative is to do the copying as find(1) goes down the
> tree with something like the following one-liner:
>
> find /usr/ports -name configure -exec sh -c 'cp {} `echo {} | sed s:/:=:g`' \;
Thanks. This one and Peder's accomplish the exact same thing :-)
Dru
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