cat file with its modified date n time

coolplanet · 10-24-2009, 07:39 PM

Dear sir,

I wish to cat those file with 90 days old to a filename with its modified date then null it, is it possible? eg

for maillog in $(find /var/log -name "maillog*" -type f -mtime +90);do
cat $maillog > $maillog.(its modified date n time)
sleep 5
cat /dev/null > $maillog
done

Regards,

ta0kira · 10-24-2009, 07:53 PM

It might be better to pipe the find into a loop, i.e. find ... | while read maillog; do, in case you have a ridiculous number of files (this will also allow for spaces in file names.) You can get the file date/time using stat, which you might use with date for a custom format:

Code:

mod_date="$( date -d "$( stat "$maillog" -c%z )" +%Y%j%H%M )"
new_file="$maillog.$mod_date"

Kevin Barry

ghostdog74 · 10-24-2009, 11:56 PM

you can do that with GNU find's printf

Code:

find . -type f -mtime +90 -printf "%p:%t\n"

check the man page for more printf option.

coolplanet · 10-25-2009, 12:34 AM

mod_date="$( date -d "$( stat "$maillog" -c%z )" +%Y%j%H%M )"
new_file="$maillog.$mod_date"

I change to +%Y%m%d%H%M and it work fine to me. Thanks for the great help!

ta0kira · 10-25-2009, 12:52 PM

Quote:

Originally Posted by ghostdog74

you can do that with GNU find's printf

Code:

find . -type f -mtime +90 -printf "%p:%t\n"

check the man page for more printf option.

This would require that the file name be parsed out in order to be read, however, and it doesn't allow a custom format.
Kevin Barry

ghostdog74 · 10-25-2009, 06:58 PM

Quote:

Originally Posted by ta0kira

This would require that the file name be parsed out in order to be read, however, and it doesn't allow a custom format.
Kevin Barry

what do you mean "file name to be parsed out" ? if you are talking about that %t part, its just an example.
this

Code:

find /path -type f -name "$maillog" -printf "Name:%f, Modified time: %AY%Aj%AH%AM\n"

does the same thing as

Code:

date -d "$( stat "$maillog" -c%z )" +%Y%j%H%M

ta0kira · 10-25-2009, 07:36 PM

The point is that the loop reads one line at a time, whether that line be the file name, the date, or a combination. The loop requires the file name by itself, regardless; therefore, if the date is also fed to the loop, it will be on the same line as the file name. That means the file name must be parsed out of the current line with e.g. cut, or the file name must be sent to the loop by itself and the date for the file must be found from within the loop.
Kevin Barry

ghostdog74 · 10-25-2009, 08:44 PM

Code:

 find . -type f -name "*log" -printf "cp '%h'/'%f' '%h'/'%f_%AY%Aj%AH%AM'\n" | bash