Shell Programming and Scripting

#!/bin/bash
# getvar.sh
# *** Create a file to work with called /tmp/var, this is from your latest reply...
echo '//*********************************\\
Build   : xxxxxxxxxxxx
Date    : Aug 24 2014
Host    : linuxUser
PID      : 3004 
xVal     : 34.0
yVal     : 101.92
:
:
xVal = 10
yVal = 20
zVal = 30' > /tmp/var
# Allocate two variables for this DEMO.
text=""
value=0
# Working code start...
while read text
do
	# (This assumes that there is a fixed width of 7 characters before the value required.)
	# Compare the first 7 characters with "xVal = " and if it exists then......
	if [ "${text:0:7}" == "xVal = " ]
	then
		# ......allocate that __number__ to variable 'value'.
		value=${text:7}
		# Once it has been detected break from the 'while' loop.
		break
	fi
# Reading from the generated file from *** above...
done < /tmp/var
# Working code end...
# The value and number of characters ensuring no leading whitespaces.
echo "The variable 'value' is $value, and the number of characters are ${#value}..."
# Exit with a return code of zero.
exit 0

Last login: Sun Aug 24 21:19:18 on ttys000
AMIGA:barrywalker~> ./getvar.sh
The variable 'value' is 10, and the number of characters are 2...
AMIGA:barrywalker~> _