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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 SUNOS

from

from(1B)					     SunOS/BSD Compatibility Package Commands						  from(1B)

NAME

       from - display the sender and date of newly-arrived mail messages

SYNOPSIS

       /usr/ucb/from [-s sender] [username]

DESCRIPTION

       The  from utility prints out the mail header lines in your mailbox file to show you who your mail is from. If  username is specified, user-
       name's mailbox is examined instead of your own.

OPTIONS

       The following option is supported:

       -s sender       Only display headers for mail sent by  sender.

USAGE

       See largefile(5) for the description of the behavior of from when encountering files greater than or equal to 2 Gbyte ( 2**31 bytes).

FILES

       /var/mail/*

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Availability		     |SUNWscpu			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       biff(1B), mail(1B), attributes(5), largefile(5)

SunOS 5.10							    28 Jan 2004 							  from(1B)
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