Shell Programming and Scripting

Hi,
I am new to unix shell scripting.
I have a requirement.
Could anyone help me writing the script for the same?
Here goes the requirement:
I have a config file let's say temp.config.
Here is the data in the config file
temp.config :
-------------
name=victor
age=42
state=texas
place=houston
zip=77477

Now I have to write a shell script which will check for a string (e.g. "state=") in the config file
and give me the result corresponding to that string (i.e. "texas" in this case) and if at all the search string is not
present then it'll just display "string not present" in the console.

Code:

awk -F= -v name='state' '$1 == name {value=$2;exit} END { print (value)?value:state "not found"}' temp.config

Thanks @vgersh99...
I've a doubt.
Let's say I have a parent script named parent_script.sh
and I'm calling sub_Script_1.sh, sub_Script_2.sh and sub_Script_3.sh inside that parent script.

The above code that you have posted is a part of sub_Script_1.sh
and in case the search string is not found then I want to exit out of the Parent script (i.e I don't want to execute anything after that) by just printing "not found" in the console. Can I do that? If yes, then could you kindly help me getting some kind of sample code?

Code:

#!/bin/ksh

# this is sub_Script_1.sh
name=$(awk -F= -v name='state' '$1 == name {value=$2;exit} END { print (value)?value:state "not found"}' temp.config)

if [ "${name}" = "not found" ]; then
   echo "WARNING: 'state' not found - bailing out from parent"
   exit 1
fi

echo "name->[${name}] - all happy - continuing on"

Code:

res=`grep state temp.conf`
if [ $? -eq 0 ];then
IFS="="
set $res
echo $2
else
echo "string not present"
fi

Thanks a lot @vgersh99 and @summer_cherry
I really appreciate the help you people have provided...

---------- Post updated at 05:51 PM ---------- Previous update was at 10:56 AM ----------

Hi,

I implemented the code as below. I'm facing some issue.

Here is my script:
testScript.sh
---------------
#!/bin/sh
arg_1=$1
echo "arg passed by user is:${arg_1}"
mapping=$(awk -F= -v name=${arg_1} '$1 == name {value=$2;exit} END { print (value)?value:"not found"}' testing.conf)
echo "mapping is $mapping"
if [ "${mapping}" = "not found" ]; then
echo "mapping passed as argument is not correct"
help
exit 1
fi

key=param_file_${mapping}
echo "key:${key}:"
param_file=`grep '${key}=' testing.conf | awk -F"=" '{print $2}'`
echo "param file is:${param_file}"

--------------------------------------------------------------------

The config file is as below:
testing.conf:
---------------
ram=219
param_file_219=/home/testDir
-----------------------------------------------------------------------
Now when I run the script as ./testScript.sh ram the output I get is as below:

output
--------------------
arg passed by user is:ram
mapping is 219
:eyaram_file_219
param file is:

Could anyone kindly let me know what's wrong in the script?