Homework & Coursework Questions

Use and complete the template provided. The entire template must be completed. If you don't, your post may be deleted!

1. The problem statement, all variables and given/known data:
Try running 'phone4 xyz' and see what happens.

Modify your program so that if no matching name is found, an appropriate
message is displayed: "Name 'xyz' not in directory".

You could use an 'if' statement to check the value of $? to see if the grep
command was successful (remember, '0' indicates success). If the grep is
NOT successful, then echo the message (which includes the value of $name).
Give it a try.

Make sure this works with both command line arguments and with a name read
in from the user, and make sure you use the message EXACTLY as shown.



2. Relevant commands, code, scripts, algorithms:



3. The attempts at a solution (include all code and scripts):

#!/bin/bash

Code:

name=$1
if [ "$name" = "" ]
then echo -n "Name 'xyz' not in directory"
read name
fi
grep -i cheryl ~uli101/uli101/phonebook
grep -i $name ~uli101/uli101/phonebook

4. Complete Name of School (University), City (State), Country, Name of Professor, and Course Number (Link to Course):

Seneca@York toronto,ontario, Canada, Joseph Hughes, ULI 101

Note: Without school/professor/course information, you will be banned if you post here! You must complete the entire template (not just parts of it).

Your problem statement clearly states to use special shell variable $? which holds the exit status of the last command executed, that is the key.

Search for examples using this special variable and you will get an idea on how to use it in your assignment.