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Full Discussion: Understanding Email notification script
Top Forums UNIX for Dummies Questions & Answers Understanding Email notification script Post 302371422 by Ariean on Saturday 14th of November 2009 04:34:50 PM
Old 11-14-2009
Understanding Email notification script
Hello All,

1) I am trying to understand the shell script written already, below is the code in this code i am seeing a variable $EMAIL_ID which was not defined in entire script, neither it is passed as a parameter while executing shell script nor it is defined in .profile, could you please tell me where this might have been defined and how could i see the value defined for this variable.

Code:
(echo "to:$EMAIL_ID"; echo "subject:Oracle-UCV_DWH Load  - Invalid User Id/Password"; echo "Invalid UserId/Password logon denied to sqlplus") | mail $EMAIL_ID

2) In the below code it seems they are calling a function, may i know what is the purpose and when it would be invoked and can it be defined in a shell script and will script would invoke this function whenever it encounters an error?

Code:
FATAL_EXIT()
{
	echo "`date '+%D %T'`: ERROR: $*";
	exit 1;
}

3) What would be the output of ERROR: $* in the above script.

Thanks,
Ariean.
 

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LEARN ABOUT SUNOS

script

script(1)							   User Commands							 script(1)

NAME

       script - make record of a terminal session

SYNOPSIS

       script [-a] [filename]

DESCRIPTION

       The  script  utility  makes a record of everything printed on your screen. The record is written to filename. If no file name is given, the
       record is saved in the file typescript. See WARNINGS.

       The script command forks and creates a sub-shell, according to the value of $SHELL, and records the text from this session. The script ends
       when the forked shell exits or when Control-d is typed.

OPTIONS

       The following option is supported:

       -a	Appends the session record to filename, rather than overwriting it.

NOTES

       script places everything that appears on the screen in filename, including prompts.

ATTRIBUTES

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

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Availability		     |SUNWcsu			   |
       +-----------------------------+-----------------------------+
       |CSI			     |Enabled			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       attributes(5)

WARNINGS

       script  can  pose  a  security risk when used in directories that are writable by other users (for example, /tmp), especially when run by a
       privileged user, that is, root. Be sure that typescript is not a link before running script.

SunOS 5.10							    30 Jan 2004 							 script(1)
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