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Full Discussion: Monitor a file and send mail
Top Forums Shell Programming and Scripting Monitor a file and send mail Post 303017046 by proactiveaditya on Tuesday 8th of May 2018 11:36:56 AM
Old 05-08-2018
Monitor a file and send mail
I want to monitor the maillog file in real time and send a mail when a certain grep condition is met. Every time the grep condition is met a mail will be sent. I wish to ignore all grep conditions 30 mins after each mail and thereafter continue monitoring.

For example:
  1. Condition is met, mail is sent
  2. 30 mins no mail even if condition is met.
  3. After 30 mins again condition is met and a mail is triggered.
  4. Again for next 30 mins no mail even if condition is met.

and so on.

I am doing the following:

Code:
tail -F -n0 /var/log/maillog | \
 grep -v --line-buffered 'status=sent' | \
 grep --line-buffered -v 'relay=local' | \
 grep --line-buffered 'relay=' | \
 while read line
 do
    echo "$line" | \
    mail -s Test mail@group.com
 done

Now i am not sure how to prevent mail sending 30 mins after the event is triggered.
Last edited by rbatte1; 05-10-2018 at 08:22 AM.. Reason: Formatted numbered list with LIST=1 tags and broke up one huge line to make it more readable.
 

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LEARN ABOUT ULTRIX

zgrep

ZGREP(1)						      General Commands Manual							  ZGREP(1)

NAME

       zgrep - search possibly compressed files for a regular expression

SYNOPSIS

       zgrep [ grep_options ] [ -e ] pattern filename...

DESCRIPTION

       Zgrep  invokes  grep  on  compressed  or  gzipped  files.   These  grep	options  will  cause  zgrep  to  terminate  with  an  error  code:
       (-[drRzZ]|--di*|--exc*|--inc*|--rec*|--nu*).  All other options specified are passed directly to grep.  If no file is specified,  then  the
       standard input is decompressed if necessary and fed to grep.  Otherwise the given files are uncompressed if necessary and fed to grep.

       If the GREP environment variable is set, zgrep uses it as the grep program to be invoked.

EXIT CODE

       2 - An option that is not supported was specified.

AUTHOR

       Charles Levert (charles@comm.polymtl.ca)

SEE ALSO

       grep(1), gzexe(1), gzip(1), zdiff(1), zforce(1), zmore(1), znew(1)

																	  ZGREP(1)
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