[bash cgi] trying to output parts of a file through a loop [Archive]

tynin

October 15th, 2010, 07:52 PM

I'm attempting to step through a file, and output each line. I'm actually doing much more than that and it works just fine on the command line. But trying to convert it to work in a bash cgi type fashion is giving me problems. I've stripped down this example to make it simple because once I solve this problem I'm sure I'll be fine. Here is my code:

file: index.sh

#!/bin/bash

echo "Content-type: text/html"
echo ""

cat <<EOF
<html>
<head><title>Test</title></head>
<body>
Walk through servers
<br><br>
EOF

walk=1

for x in `cat ./servers`; do
serverIP=`more +$walk ./servers | head -n 1`

echo $serverIP
echo $walk

walk=$(( walk+1 ));
done

cat <<EOF
</body>
</html>
EOF

file: servers

255.255.255.1
255.255.255.2
255.255.255.3

When I run it from the command line, it correctly steps through the IP's and displays them:
----
/var/www/cgi-bin# ./index.sh
Content-type: text/html

<html>
<head><title>Test</title></head>
<body>
Walk through servers
<br><br>
255.255.255.1
1
255.255.255.2
2
255.255.255.3
3
</body>
</html>
----

When I call it from a browser I get back the following:
-----
Walk through servers

:::::::::::::: 1 :::::::::::::: 2 :::::::::::::: 3
-----

I'm running bash 4.1.5, and apache 2.2.16. Suggestions? Thanks!

DaithiF

October 15th, 2010, 11:45 PM

slow evening here so I had a look through the more source-code. Theres some logic there which outputs '::::::::::' rather than the contents of a file when a certain condition is met ... i think when its not being run from an interactive terminal.

but as spjackson says, more isn't the tool you want. Do something like:

while read ip
do
echo $ip
echo $walk
walk=$(( walk + 1))
done < ./servers