Verify input parameter is in the list

Shell Programming and Scripting
1

I need write a Korn shell which accept input parameter. But this input paramter must match one of the string in an existsing file (listkeyword). Can someone one help, how this can be done ?

2

What do you have so far?

3

Perhaps something like this:

#!/usr/bin/env ksh

read SOMEINPUT?"Enter your input: "
FILE="/tmp/somefile"
if [[ $(grep -i -c $SOMEINPUT $FILE) -ge 1 ]]; then
    echo "$SOMEINPUT exists in $FILE."
else
    echo "No match found for $SOMEINPUT in $FILE."
fi
4

Might be worth storing the list in a variable and running a select loop on it