Piping find into tar...
bonomi at mail.r-bonomi.com
Wed May 4 13:04:05 UTC 2011
> From owner-freebsd-questions at freebsd.org Wed May 4 02:26:32 2011
> Date: Wed, 4 May 2011 01:25:39 -0600
> From: Modulok <modulok at gmail.com>
> To: FreeBSD Questions <freebsd-questions at freebsd.org>
> Subject: Piping find into tar...
> I've been playing with the find command lately. Is there a way I can pipe
> the putput list of files from find, into the tar command to create an
> archive which contains the files which find lists? I tried the following,
> but it didn't work
> find -E . '.*\.txt$' -print | tar -cjf result.tgz
You're asking 'the wrong question'.
tar _requires_ the filenames to be listed as parameters to the command.
There are at least four ways to accomplish this, given the specific
example you show.
1) The simplest: tar -cjf result.tbz .*.txt *.txt
2) in-line substitution: tar -cjf result.tbz `find -E . '.*\.txt$' -print`
3) using the '-T' option:
find -E . '.*\.txt$' -print0 | tar -c -j --null -T - -f result.tbz
3) using xargs:
find -E . '.*\.txt$' -print0 | xargs tar -rjf result.tar; bzip2 result.tar
Options 1) or 2) will fail 'immediately', if the pattern expands to an
excessively long set of filenames.
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