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Old 08-05-2005, 02:01 AM   #1
daYz
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Perl regular expressions (Solved)


Hi,

I am trying to configure swatch, a program that uses regular expressions from perl to analyse log files. When a regular expression in the config file matches a line in a log file it can be showed on the terminal etc. The problem is that I don't know how perl works.

I want for example log the lines with "su" in it. It appears like "su[8957]:" in the log files but the number varies. The "su" line won't get logged if I only use "su" in my swatch config file, I should also use a regular expression from perl to grab the "[number]:" part.

I also want to log lines with "sudo:" in it, but it won't work if I use "sudo" and "sudo:" in my swatch config file, so I am looking for a solution for that also.

Does someone know how I can handle this?

Thanks for your help

Last edited by daYz; 08-05-2005 at 12:48 PM.
 
Old 08-05-2005, 03:56 AM   #2
keefaz
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Maybe try /su/ or /su\[\d+\]/ ?
 
Old 08-05-2005, 12:47 PM   #3
daYz
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Thanks for your help. I have discovered that I can use /su*/ to log both su and sudo. Should have tried that earlier.

Last edited by daYz; 08-05-2005 at 12:53 PM.
 
Old 08-07-2005, 05:09 AM   #4
eddiebaby1023
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Quote:
Originally posted by daYz
Thanks for your help. I have discovered that I can use /su*/ to log both su and sudo. Should have tried that earlier.
If I understand perl's regexps correctly, you're matching anything with an 's' followed by zero or more occurrences of 'u'. That's fine if that's what you really want, but I'd suggest using /su.*/ which will match "su" followed by anything.
 
Old 08-11-2005, 01:06 AM   #5
daYz
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Thanks for clarifying that eddiebaby1023. What you suggest works fine, but when I also try to log sshd with /sshd.*/ all three su, sudo and sshd don't get logged.

Any suggestions on that?

Thanks
 
Old 08-11-2005, 04:53 AM   #6
keefaz
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Maybe try :
Code:
/su|sshd/

Last edited by keefaz; 08-11-2005 at 04:55 AM.
 
Old 08-11-2005, 07:27 AM   #7
daYz
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Yes!!!! This seems to work, also for the other things I want to log.

Thanks both of you.

Regards,

Ben
 
  


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