Exploring Expect

Exercises

1. Write a pattern to match hexadecimal numbers. Write a pattern to match Roman numbers.

2. Write a pattern to match the literal string timeout. Write a pattern to match the literal string "timeout" (with the double quotes).

3. Write a script that takes a string and produces a pattern which will match the string. Make the script prompt for the string to avoid any interpretation of it by the shell.

4. On page 101, I described what happens if the spawned process closes the connection first and what happens if the script closes the connection first. What happens if both the script and the spawned process close the connection simultaneously?

5. Write a script that automatically retrieves the latest release of Expect and installs it. In what ways can you generalize the script so that it can retrieve and install other software?