On Tue, 27 Jan 2004 at 15:23:56 -0800, Ryan Finnie wrote:
>
> I was looking for a way to set up a cron job to, once per day, scan only
> files that have changed in the last day. find works pretty well for that,
> but the question is how to get the data to clamscan. My first thought was
> xargs, but xargs isn't the most consistent when dealing with spaces/quotes
> in filenames,
For a tip, read on...
> and plus you have a limit on the total size of args passed
> to a program. The current best working solution would be to do this:
>
> find /path -ctime -1 -exec clamscan \{\} \;
>
> but that invokes clamscan for EVERY matching file found. Instead, I would
To minimize wasting time and resources on invoking clamscan for multiple
files, use clamdscan.
> like to request that a new flag, say -f, be added to clamscan/clamdscan
> that takes a list of files, one file per line, from a file (-f file) or
> stdin (-f -). That way you could do:
>
> find /path -ctime -1 | clamscan -i -f -
>
> or:
>
> find /path -ctime -1 > /tmp/toscan
> clamscan -i -f /tmp/toscan
>
> and put it in a nightly cron job. What do you think?
>
> RF
Tips related to filenames with spaces, quotes etc.:
find /path -ctime -1 -print0 | xargs -0r command
man find:
-print0
True; print the full file name on the standard out
put, followed by a null character. This allows
file names that contain newlines to be correctly
interpreted by programs that process the find out
put.
man xargs:
--null, -0
Input filenames are terminated by a null character
instead of by whitespace, and the quotes and back
slash are not special (every character is taken
literally). Disables the end of file string, which
is treated like any other argument. Useful when
arguments might contain white space, quote marks,
or backslashes. The GNU find -print0 option pro
duces input suitable for this mode.
--no-run-if-empty, -r
If the standard input does not contain any non
blanks, do not run the command. Normally, the com
mand is run once even if there is no input.
--
Tomasz Papszun SysAdm @ TP S.A. Lodz, Poland | And it's only
[EMAIL PROTECTED] http://www.lodz.tpsa.pl/ | ones and zeros.
[EMAIL PROTECTED] http://www.ClamAV.net/ A GPL virus scanner
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