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Old 07-21-2005, 12:48 PM   #1
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Registered: Jun 2005
Location: Baltimore, MD
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Question Trying to do something wierd with the date command

Thanx to some help from Tink, I am now able to rename files using the date (format /data/openldaptemp/dump-yyyymmdd.ldif). However, I want to delete files older than seven days old based on the date stored in the file name. I don't want to use the date attributes of the files for a variety of reasons. Thus, this does NOT work for me -

find -name "dump*" -ctime +7 -exec rm {} \;

What I tried to do was something along these lines -

while [ -e /data/openldaptemp/dump-$(date --date='${lookback} days ago' +%Y%m%d).ldif ]
rm /data/openldaptemp/dump-$(date --date='${lookback} days ago' +%Y%m%d).ldif

However, the date command doesn't allow variables (or I can't figure out how to get it to allow variables) in the --date='' option. How should I do this?


Old 07-22-2005, 07:55 AM   #2
Registered: May 2005
Location: hanoi vietnam
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Please tell me what is tink.
What do not work for you ? Is it the command: find -name "dump*" -ctime +7 -exex rm {} \ ?
Old 07-22-2005, 10:38 AM   #3
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Post Tink and the trouble I'm having

First, Tink, or Tinker, is another member of that helped me get started using the date commmand in the first place.

As for what doesn't work, the solution Tink gave (find -name "dump*" -ctime +7 -exec rm {} \ relies on the date attribute of the files, which I do NOT want to use. I want to find files based on the date written in the file name. Is there someway to do this?
Old 07-22-2005, 05:24 PM   #4
Registered: Jul 2005
Location: Ab Ca
Distribution: Redhat EL Sun Mac OSX FC 3.0 & 4.0
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You will need to use a scripting language like perl.
Basically you will readdir for files.
Split file names by "-" dump-yyyymmdd.ldif
again with "." so you end up with yyyymmdd referencing the dump-yyyymmdd.ldif

sorta like this


my ($source, @dir, $dir, $file, $inc);
my $div = "/";

my $date = `date +%Y%m%d`;
my $source = shift; #Accepts search directory as ARG from command line
opendir(SD, "$source") or die ($!);
my @dir = grep { ! /^\./ or !-d} readdir SD; #filter out currentdirectory, 'dot' files and subdirectories
$inc = @dir;
exit(0) if $inc < 6; #If there are less than 7 files in this directory just exit
foreach $dir(@dir)
my $fname = $source.$div.$dir;
if ($dir =~ /\.ldif$/)
my @sep1 = split("-", $dir);
my @sep2 = split(/\./, $sep1[1]);
my $fdate = $sep2[0]; #Holds the numeric portion of file name;
if ($date - $fdate >= 7)
unlink($fname) or die ($!)

This works except when the month end rolls around.


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