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Full Discussion: how to prevent multiple email notifications from monitoring script
Top Forums Shell Programming and Scripting how to prevent multiple email notifications from monitoring script Post 302120564 by cbkihong on Thursday 7th of June 2007 05:44:57 AM
Old 06-07-2007
I had an HTTP monitoring Perl script written some years ago driven by cron once every 5 minutes with similar reporting facility. What I did was even simpler - to create a state file with just "0" or "1" to indicate whether an alert mail has been sent before. When a later run sees "1", it will not send the mail again (but will still log the error). When the service is up again, the next run will reset the file content to "0". Basically, if there was no file or the file content is "0", a mail will be sent and overwrite the file with a "1" if some tests failed.

As a simple monitoring facility, it worked for me. Of course, you may wish to also save a checksum of the error message and compare against the current message to see whether the error message has changed, in which case I think another message should be sent even though some trouble mail has been sent in the past.
 

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LEARN ABOUT OSF1

mhmail

mhmail(1)						      General Commands Manual							 mhmail(1)

NAME

       mhmail - send or read mail (only available within the message handling system, mh)

SYNOPSIS

       mhmail [addrs...] [options]

OPTIONS

       Specifies  the  text  of the message. If it is specified, then the standard input is not read.  Specifies addresses to be placed in the cc:
       field of the message.  Specifies the content of the From: header of the draft. The address given is placed in the From: field of  the  mes-
       sage.  The  Sender:  field is filled in correctly by post.  Prints a list of the valid options for this command.  Specifies the mail system
       over which mail is sent. The only value allowed is smtp, which is the standard mail system.  Additional values are supported only  for  use
       with other mail systems.  Provides the text of the Subject: field of the message.

DESCRIPTION

       The  mhmail  program is intended as a replacement for the standard mail programs, bellmail and ucbmail. See binmail(1) and mail(1) for more
       details of these mail programs. When invoked without arguments, it simply invokes inc to incorporate new messages from the user's maildrop.
       When  one  or  more  users is specified, a message is read from the standard input and spooled to a temporary file. The mhmail program then
       invokes post with the name of the temporary file as its argument to deliver the message to the specified user.

       Normally, people will use comp and send to send messages.

RESTRICTIONS

       Messages with a null body part will not be sent by mhmail.  You must include some body text in all messages to be sent by mhmail.

       For this version, the -mts option only supports the value smtp. Additional values are supported for use only with other mail systems.

FILES

       Program to incorporate a maildrop into a folder.  Program to deliver a message.	Temporary copy of message.

SEE ALSO

       inc(1), post(8)

																	 mhmail(1)
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