Working with the Unix OS

Unix Tools
# loop until user selects exit
while true ; do
# display menu
echo '
Would you like to:
1. Look someone up
2. Add someone to the phone book
3. Remove someone from the phone book
4. Change an entry in the phone book
5. Show all entries in phone book
6. Quit
Please select one of the above (1-6):\c'
# read and process selection
read choice
echo
case "$choice" in
1 | l) echo "Enter name to look up: \c"
read name
if [ -z "$name" ]; then
echo "Lookup ignored"
else
rololu "$name"
fi;;
2 | a) roloadd ;;
3 | r) echo "Enter name to remove: \c"
read name
if [ -z "$name" ]; then
echo "remove ignored"
else
roloremove "$name"
fi;;
4 | c) echo "Enter name to change: \c"
read name
if [ -z "$name" ]; then
echo "change ingored"
else
rolochange "$name"
fi;;
5 | s) roloshowall;;
6 | q) exit 0;;
*) echo "Bad choice\007";;
esac
done
#!/bin/sh
# @(#)rololu - look up someone in the phone book
if [ "$#" -ne 1 ]; then
echo "Incorrect number of arguments"
echo "usage: rololu name"
exit 1
fi
name=$1
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