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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 CENTOS

tcl_allowexceptions

Tcl_AllowExceptions(3)					      Tcl Library Procedures					    Tcl_AllowExceptions(3)

__________________________________________________________________________________________________________________________________________________

NAME

       Tcl_AllowExceptions - allow all exceptions in next script evaluation

SYNOPSIS

       #include <tcl.h>

       Tcl_AllowExceptions(interp)

ARGUMENTS

       Tcl_Interp *interp (in)		Interpreter in which script will be evaluated.
_________________________________________________________________

DESCRIPTION

       If  a  script is evaluated at top-level (i.e. no other scripts are pending evaluation when the script is invoked), and if the script termi-
       nates with a completion code other than TCL_OK, TCL_ERROR or TCL_RETURN, then Tcl normally converts this into a TCL_ERROR  return  with	an
       appropriate  message.  The particular script evaluation procedures of Tcl that act in the manner are Tcl_EvalObjEx, Tcl_EvalObjv, Tcl_Eval,
       Tcl_EvalEx, Tcl_GlobalEval, Tcl_GlobalEvalObj, Tcl_VarEval and Tcl_VarEvalVA.

       However, if Tcl_AllowExceptions is invoked immediately before calling one of those a procedures, then arbitrary completion codes  are  per-
       mitted from the script, and they are returned without modification.  This is useful in cases where the caller can deal with exceptions such
       as TCL_BREAK or TCL_CONTINUE in a meaningful way.

KEYWORDS

       continue, break, exception, interpreter

Tcl									7.4						    Tcl_AllowExceptions(3)
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