Shell Programming and Scripting

xVal = 10
yVal = 20
zVal = 30

grep -r -n "xVal =" fileName

##:xVal = 10

while read XV E VAL; do if [ "$XV" = "xVal" ] && break; done < file

#!/bin/sh
awk '/^xVal\=\         {VAL=$2}' OFS="\t" fileName
sed -i s/"xVal = 5"/"xVal = $VAL"/g otherFileName

#!/bin/sh

while read XV E VAL; do if [ "$XV" = "xVal" ] && break; done < file1;
sed -i s@"xVal = 60.0"@"xVal = $VAL"@g file2;

Syntax error: "done"

#!/bin/bash
# getvar.sh
echo 'xVal = 1234567890
yVal = 20
zVal = 30' > /tmp/var
# Working code start...
while read text
do
	if [ "${text:0:7}" == "xVal = " ]
	then
		value=${text:7}
		break
	fi
done < /tmp/var
# Working code end...
# The value and number of characters ensuring no leading whitespaces...
echo "$value, ${#value}"

Last login: Sun Aug 24 15:12:24 on ttys000
AMIGA:barrywalker~> chmod 755 getvar.sh
AMIGA:barrywalker~> ./getvar.sh
1234567890, 10
AMIGA:barrywalker~> _

somevar=
while read label dummy val
do
  if [ "$label" = xVal ]; then 
    somevar=$val
    break
  fi
done < file

//*********************************\\
Build   : xxxxxxxxxxxx
Date    : Aug 24 2014
Host    : linuxUser
PID      : 3004 
xVal     : 34.0
yVal     : 101.92
:
:
xVal = 10
yVal = 20
....

xVal = VALUE

  if [ "$label" = xVal ] && [ "$dummy" = '=' ]; then