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Full Discussion: Do I need an Array for this?
Top Forums Shell Programming and Scripting Do I need an Array for this? Post 302558490 by Corona688 on Friday 23rd of September 2011 05:04:52 PM
Old 09-23-2011
FIND_OLD_DIR is holding the literal string "find . -type d -mtime +180". You used single quotes, not backticks.

You don't need backticks or eval, though. Which is good because
1) Backticks can only hold a limited number of results
2) Eval is dangerous. If someone had a file named `rm -Rf ~/*` they'd have a real rotten day.

You also want find to stop when it matches a dir and match no deeper, otherwise it may find more folders inside the folder.

Code:
# find .         Search inside .
# '!' -name '.'  ...for things not named .
# -type d        ...which are directories
# -mtime +180    ...that are 180+ days old
# -prune         ...and if they match all the above, don't search deeper
find . '!' -name '.' -type d -mtime +180 -prune |
# "echo a b c d | xargs touch" is equivalent to "touch 'a' 'b' 'c' 'd'".
# The -I{} forces xargs consider each line as one and only one argument.
        xargs -I{} tar -cf - > file.tar

If you find thousands and thousands of directories, tar might be run more than once because there'd be too many filenames to fit in one call to tar. Hunting for folders instead of files should definitely reduce the number of things that need to be fed into tar, though.

---------- Post updated at 03:04 PM ---------- Previous update was at 02:45 PM ----------

If you're in Linux, you can avoid this limitation by feeding the filenames into tar with -T:
Code:
# find .         Search inside .
# '!' -name '.'  ...for things not named .
# -type d        ...which are directories
# -mtime +180    ...that are 180+ days old
# -prune         ...and if they match all the above, don't search deeper
find . '!' -name '.' -type d -mtime +180 -prune |
# Create file.tar, reading filenames from standard input
        tar -cf file.tar -T -

Last edited by Corona688; 09-23-2011 at 05:52 PM..
 

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LEARN ABOUT SUSE

virt-tar-out

virt-tar-out(1) 					      Virtualization Support						   virt-tar-out(1)

NAME

       virt-tar-out - Pack a virtual machine disk image directory into a tarball.

SYNOPSIS

	virt-tar-out -a disk.img /dir files.tar

	virt-tar-out -d domain /dir files.tar

	virt-tar-out -d domain /dir - | gzip --best > files.tar.gz

DESCRIPTION

       "virt-tar-out" packs a virtual machine disk image directory into a tarball.

       The first parameter is the absolute path of the virtual machine directory.  The second parameter is the tar file to write.  Use "-" to
       write to standard output.

EXAMPLES

       Download the home directories from a guest:

	virt-tar-out -d MyGuest /home - | gzip --best > homes.tar.gz

JUST A SHELL SCRIPT WRAPPER AROUND GUESTFISH

       This command is just a simple shell script wrapper around the guestfish(1) "tar-out" command.  For anything more complex than a trivial
       copy, you are probably better off using guestfish directly.

OPTIONS

       Since the shell script just passes options straight to guestfish, read guestfish(1) to see the full list of options.

SEE ALSO

       guestfish(1), virt-cat(1), virt-copy-in(1), virt-copy-out(1), virt-edit(1), virt-tar-in(1), <http://libguestfs.org/>.

AUTHORS

       Richard W.M. Jones ("rjones at redhat dot com")

COPYRIGHT

       Copyright (C) 2011 Red Hat Inc.	<http://libguestfs.org/>

       This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by
       the Free Software Foundation; either version 2 of the License, or (at your option) any later version.

       This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
       MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more details.

       You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation,
       Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.

libguestfs-1.18.1						    2013-12-07							   virt-tar-out(1)
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