On Wed, 11 Dec 2013 12:42:51 +0100 "Gian Uberto Lauri" <sa...@eng.it> wrote:
> Sharon Kimble writes:
> > But there is no consistency with the creation date, the menu
> > itself is regenerated whenever I install a new programme, and the
> > old menu is saved with the suffix of the date and time.
>
> > I want to delete the 'menu-*' files if there are more than 7, and
> > the command is parsed when I have 'set -x' at the head of the
> > script but this line does nothing! It runs but doesn't achieve
> > anything.
>
> The find command is not your friend here, I think.
>
> If you have a single directory where these menu are regenerated
> automatically, you could exploit the fact that lines like
>
> menu-20131209-11:05
>
> have an asciibetic order (order based on the ASCII code) that matches
> the age order, but reversed, I mean newer backups come last. The
> option -t of ls fixes this.
>
> I would try with something like this:
>
> if [ `ls -1 menu-* | wc -l` -gt 7 ]
> then
> ls -t menu-* | tail $((7-`ls | wc -l`)) | xargs rm
> fi
>
> The first test ensures that you have more than 7 files.
>
> Then you list the files in reverse asciibetical order (that is older
> last), then the expression
>
> $((7-`ls | wc -l`))
>
> does the magic to compute the option to pass to tail so that it shows
> the last (number of files - 7). And finally xargs feeds rm. You can
> use rm -v to see them being deleted :)
>
> I hope this helps.
>
Thanks for this, I've just got round to testing it. I pasted it into my
bigger script which works as expected, and then it came to your lines
of code, and this is its output from it -
++ wc -l
++ ls -1 'menu-*'
ls: cannot access menu-*: No such file or directory
+ '[' 0 -gt 7 ']'
Does this help in debugging it?
For the record, this is the working parts of the script so you can see
how it all fits together -
mv ~/.fluxbox/menu{,-$(date +%Y%m%d-%R)}; mmaker fluxbox -f; sed -i
'\|\[exec[]]\s[(].*[)]\s[{]/usr/lib/xscreensaver/.*\s-root[}]|d'
~/.fluxbox/menu; sed -i '\|\[exec[]]\s[(].*[)]\s[{]\b\(xscreensaver\).*[}]|d'
~/.fluxbox/menu; perl -0777 -pi -e
's/(.*)\[end]/$1/s;s/(.*)\[end]/$1/s;s/^\s*\n//gm' ~/.fluxbox/menu; printf
'\t[end]\n\t[separator]\n\t[submenu] (My Menu)\n\t[include]
(~/.fluxbox/usermenu)\n\t[end]\n\t[end]' >>~/.fluxbox/menu
chown boudiccas: ~/.fluxbox/menu
#find /home/boudiccas/.fluxbox -type f -mtime +"$num" -name 'menu-*' -delete
if [ `ls -1 menu-* | wc -l` -gt 7 ]
then
ls -t menu-* | tail $((7-`ls | wc -l`)) | xargs rm
fi
Sharon.
--
A taste of linux = http://www.sharons.org.uk
efever = http://www.efever.blogspot.com/
efever = http://sharon04.livejournal.com/
my git repo = https://bitbucket.org/boudiccas/dots
Debian testing, Fluxbox 1.3.5, LibreOffice 4.1.3.2
Registered Linux user 561944
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