HTML in Shell Scripting UNIX

Question

val=Mumbai

cat << 'EOF' > pkll1.htm
<html> 
<head>
<title>HTML</title>
</head>
<body>
<h1>$val</h1>
while read line
do
val1=`echo $line`
<p>$val1</p>
done<myfile.dat
</body>
</html>
EOF

Above code showing output as below instead of actual value:

$val
while read line do val1=`echo $line` 
$val1

done

How to execute it in correct way?Help me please.

ghoti · Accepted Answer · 2012-09-08 10:45:07Z

5

Do it in separate blocks, with the code in the middle.

val=Mumbai
file=pkll1.htm

cat <<EOF1 > $file
<html> 
<head>
<title>HTML</title>
</head>
<body>
<h1>$val</h1>
EOF1

while read line; do
  val1=`echo $line`
  echo "<p>$val1</p>" >> $file
done < myfile.dat

cat <<EOF2 >> $file
</body>
</html>
EOF2

answered Sep 8, 2012 at 10:45

ghoti

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2 Comments

reece Over a year ago

Note that the cat << EOF syntax treats any content up to the EOF line as input to the cat command (this will work for other commands as well). Therefore, no commands or unescaping is being performed on the text. This is like the """...""" syntax in python -- python does not execute any code within that block. This explains why @pkawar's shell script does not work as intended.

ghoti Over a year ago

Yes, and it's why I used separate chunks terminated by EOF1 and EOF2 instead.

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