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Special Forums UNIX and Linux Applications Infrastructure Monitoring How to setup Email notification when storage reach certain % ? Post 302409412 by son_t on Thursday 1st of April 2010 05:01:32 AM
Old 04-01-2010
You don't need to set up an SMTP host from scratch (sendmail needs a lot of study Smilie). Use a perl script calling up the Net::SMTP module and connect to an existing SMTP host (you do have one of these, don't you?)

Here's a script that I knocked up. Call it up by piping or redirecting the message content with a message title followed by a list of users.

Code:
#!/usr/bin/perl
#(C) son_t, 2010
#Usage: sendmessage.pl "MESSAGE TITLE" <user> [<user>] < message_content_file
#Or: cat message_content_file | sendmessage.pl "MESSAGE TITLE" <user> [<user>]"

use Net::SMTP;

my $domain = "YOUR DOMAIN";
my $smtphost = "YOUR SMTP HOST";
my $sending_user = `/usr/ucb/whoami`;
chop($sending_user);
my $server = `/usr/bin/hostname`;
chop($server);

my $subject=shift(@ARGV);

my @users = @ARGV;
if (!@users) {
    print STDERR "Must specify one or more users\n";
    exit 1;
}

# qualify addresses
for (my $i = 0; $i < @users; $i++) {
    $users[$i] = $users[$i] . "\@$domain" if ($users[$i] !~ /\@/);
}

# connect
#print "connect smtphost:$smtphost server.domain:$server.$domain\n";
$smtp = Net::SMTP->new("$smtphost",Hello=>"$server.$domain");
if (!defined($smtp)) {
    print STDERR "Error connecting to server\n";
    exit 1;
}

# setup
#print "setup $sending_user\@$server.$domain\n";
$smtp->mail("$sending_user\@$server.$domain");
$smtp->recipient(@users);
$smtp->data();

# header
my $tousers = join(', ', @users);
#print "header tousers:$tousers sending_user:$sending_user\@$server.$domain subject:$subject\n";
$smtp->datasend("To: $tousers\n");
$smtp->datasend("From: $sending_user\@$server.$domain\n");
$smtp->datasend("Subject: $subject\n\n");

# body
$smtp->datasend(<STDIN>);

# finish
$smtp->dataend();
$smtp->quit;

It would be nice to see your (or anybody's) disk usage monitoring script, if you've written one. I've got one, which I found on the web and modified for my own use (which I could post if anyone is interested.)
 

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Mail::SendEasy::SMTP(3pm)				User Contributed Perl Documentation				 Mail::SendEasy::SMTP(3pm)

NAME
Mail::SendEasy::SMTP - Handles the communication with the SMTP server without dependencies. DESCRIPTION
This module will handle the communication with the SMTP server. It hasn't dependencies and supports authentication. USAGE
use Mail::SendEasy ; $smtp = Mail::SendEasy::SMTP->new( 'domain.foo' , 25 , 120 ) ; if ( !$smtp->auth ) { warn($smtp->last_response_line) ;} if ( $smtp->MAIL("FROM:<$mail{from}>") !~ /^2/ ) { warn($smtp->last_response_line) ;} if ( $smtp->RCPT("TO:<$to>") !~ /^2/ ) { warn($smtp->last_response_line) ;} if ( $smtp->RCPT("TO:<$to>") !~ /^2/ ) { warn($smtp->last_response_line) ;} if ( $smtp->DATA =~ /^3/ ) { $smtp->print("To: foo@foo") ; $smtp->print("Subject: test") ; $smtp->print(" ") ; $smtp->print("This is a sample MSG!") ; if ( $smtp->DATAEND !~ /^2/ ) { warn($smtp->last_response_line) ;} } $smtp->close ; METHODS
new ($host , $port , $timeout , $user , $pass) Create the SMTP object and connects to the server. connect Connect to the server. auth_types The authentication types supported by the SMTP server. auth($user , $pass) Does the authentication. print (data) Send data to the socket connection. cmd (CMD , @MORE) Send a command to the server. response Returns the code response. If wantarray returns an ARRAY with the response lines. last_response Returns an ARRAY with the response lines. last_response_msg The last response text. last_response_line The last response line (code and text). close QUIT and close the connection. AUTHOR
Graciliano M. P. <gm@virtuasites.com.br> COPYRIGHT
This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself. perl v5.12.4 2004-04-09 Mail::SendEasy::SMTP(3pm)
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