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Old 05-21-2006, 08:02 AM   #1
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Registered: Nov 2005
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Question A regularly executing "find" command without my intention freaks me

Hello everyone,
There is a find command running on some regular intervals without my intention, and I want to understand what it does. It has may regex in it and I am a bit alien to those regex stuff, so can someone please translate it to me (especially this \(^/mnt$\)\|\(^/cdrom$\).... part)? and how come there is some parenthesis after directory to be searched? Anyway, here's the output of the command via
 ps -aux | grep 'find'
: Thanks in advance!

/usr/bin/find / ( -fstype nfs -o -fstype NFS -o -fstype proc -o -fstype afs -o -fstype proc -o -fstype smbfs -o -fstype autofs -o -fstype iso9660 -o -fstype ncpfs -o -fstype coda -o -fstype devpts -o -fstype ftpfs -o -fstype devfs -o -fstype mfs -o -fstype sysfs -o -fstype shfs -o -type d -regex \(^/mnt$\)\|\(^/cdrom$\)\|\(^/tmp$\)\|\(^/usr/tmp$\)\|\(^/var/tmp$\)\|\(^/var/spool$\)\|\(^/proc$\)\|\(^/media$\) ) -prune -o -print0
Old 05-21-2006, 10:04 AM   #2
Registered: Mar 2005
Location: UK
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^ means 'not'
$ means at the end of end of a line
| means or
Brackets make an expression rather than a list of separate characters, so here brakcets makes /tmp an expression and not / and t and m and p.
The backslashes \ seem to be the syntax for this particular command (?)

It looks like this regex is excluding a list of directories from being searched.
Old 05-21-2006, 10:29 AM   #3
spirit receiver
Registered: May 2006
Location: Frankfurt, Germany
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Originally Posted by rjwilmsi
^ means 'not'
To my knowledge it represents the beginning of a line unless contained in square brackets. So the regular expression tells find which directories to examine.

The parentheses are just logical grouping. I guess that this command is issued by one of the scripts in /etc/cron.daily, but I couldn't find it in SUSE 10.1. If that's the case, moving the script to /etc/cron.weekly probably won't do much harm, so that it won't be executed that often at least.



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