12-04-2011
No problem^^
NR stands for the awk built-in variable "Number Record". It automatically has the current line number assigned as value. If you have more than one file as input, there is also FNR which stands for "File Number Record".
Basically it is the line number of the current file that is being processed.
RS is the "Record Separator" variable, that stores the char that separates lines. Per default that is a newline "\n". By deleting that, awk automatically takes an expression like "\n\n+" as RS. That means that 1 or more empty lines will separate lines/records in terms of awk.
Since the text of the mail is in the second block, we just check if NR==2 and this evaluates to true, the commands inside {} will be executed. I took printf as it leaves out the additional blank line that would be displayed else.
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LEARN ABOUT CENTOS
script-email
SCRIPT-EMAIL(8) System Administration Commands SCRIPT-EMAIL(8)
NAME
script-email - Amanda script to send email notifications
DESCRIPTION
script-email is an Amanda script implementing the Script API. It should not be run by users directly. It sends a notification email to the
addresses specified in the MAILTO property.
PROPERTIES
This section lists the properties that control script-email's functionality. See amanda-scripts(7) for information on the Script API,
script configuration.
MAILTO
List of email addresses that will receive an email on command execution. It is a multi-valued property:
property "MAILTO" "amanda@domain.com" "sysadmin@domain.com" "amandauser@domain.com"
EXAMPLE
In this example, script-email is scheduled to be run before the DLE, on the server. The unqualified email address amanda will be passed to
the email system unchanged. The script is then attached to a dumptype, which can then be specified for any DLEs which require
notification.
define script-tool pre-email {
comment "email me before this DLE is backed up"
plugin "script-email"
execute-on pre-dle-backup
execute-where server
property "mailto" "amanda"
}
define dumptype user-tar-email {
user-tar
script "pre-email"
}
SEE ALSO
amanda(8), amanda.conf(5), amanda-client.conf(5), amanda-scripts(7)
The Amanda Wiki: : http://wiki.zmanda.com/
AUTHORS
Jean-Louis Martineau <martineau@zmanda.com>
Zmanda, Inc. (http://www.zmanda.com)
Dustin J. Mitchell <dustin@zmanda.com>
Zmanda, Inc. (http://www.zmanda.com)
Amanda 3.3.3 01/10/2013 SCRIPT-EMAIL(8)