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Full Discussion: Help--understanding the script
Top Forums Shell Programming and Scripting Help--understanding the script Post 302832963 by gnnsprapa on Tuesday 16th of July 2013 04:02:16 AM
Old 07-16-2013
sendNotice_sp() # define a function called sendNotice
{
ATTACH=${LNXLOG:-} # Assign the value of the "LNXLOG:-" variable to the variable ATTACH, seriously who named that?
if [ ! -z ${ATTACH} ]; then # If the ATTACH variable is not empty
if [ -f $ATTACH ]; then # if the ATTACH variable is a valid filename
mail -s "$ERR_MSG" $ERR_EMAIL_TO < $ATTACH # Send a mail with the value of ERR_MSG as the subject line and The contents of the file to the address in ERR_EMAIL_TO
fi # end filename check
else # ATTACH has no value
mail -s "$ERR_MSG" $ERR_EMAIL_TO < /dev/null # send an empty message with the error message as the subject line to the ERR_EMAIL_TO address
fi
}

thanx Skrynesaver for ur explanantion...can u plz verfy this,
ATTACH=${LNXLOG:-} # Assign the value of the "LNXLOG:-" variable to the variable
here are we assigning value of LNXLOG:- variable value to attach variable or we are assigning LNXLOG:-(as a string) to attach variable..please correct me if m worng..and why used {} while assigning attach variable
 

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LEARN ABOUT CENTOS

font::ttf::gdef

Font::TTF::GDEF(3)					User Contributed Perl Documentation					Font::TTF::GDEF(3)

NAME

       Font::TTF::GDEF - Opentype GDEF table support

DESCRIPTION

       The GDEF table contains various global lists of information which are apparantly used in other places in an OpenType renderer. But
       precisely where is open to speculation...

INSTANCE VARIABLES

       There are up to 5 tables in the GDEF table, each with their own structure:

       GLYPH
	   This is an Font::TTF::Coverage Class Definition table containing information as to what type each glyph is.

       ATTACH
	   The attach table consists of a coverage table and then attachment points for each glyph in the coverage table:

	   COVERAGE
		   This is a coverage table

	   POINTS  This is an array of point elements. Each element is an array of curve points corresponding to the attachment points on that
		   glyph. The order of the curve points in the array corresponds to the attachment point number specified in the MARKS coverage
		   table (see below).

       LIG This contains the ligature caret positioning information for ligature glyphs

	   COVERAGE
		   A coverage table to say which glyphs are ligatures

	   LIGS    An array of elements for each ligature. Each element is an array of information for each caret position in the ligature (there
		   being number of components - 1 of these, generally)

		   FMT	       This is the format of the information and is important to provide the semantics for the value. This value must be
			       set correctly before output

		   VAL	       The value which has meaning according to FMT

		   DEVICE      For FMT = 3, a device table is also referenced which is stored here

       MARKS
	   This class definition table defines the classes of mark glyphs that can be selected for processing using the MarkAttachmentType field
	   of lookup FLAG words.

       MARKSETS
	   Contains an array of coverage tables indexed by the FILTER value of a lookup.

METHODS

   $t->read
       Reads the table into the data structure

   $t->out($fh)
       Writes out this table.

   $t->update
       Sort COVERAGE tables.

perl v5.16.3							    2012-08-08							Font::TTF::GDEF(3)
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