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Expert Shell Scripting
book

Expert Shell Scripting

by Ron Peters
December 2008
Intermediate to advanced content levelIntermediate to advanced
320 pages
6h 45m
English
Apress
Content preview from Expert Shell Scripting

CHAPTER 18User Input Timeout

Sometimes you want a program that accepts user input to run automatically. If the user does not type anything within a specified amount of time, the program should continue running and use a default value for input.

A boot loader is a good example of this type of application. It would give the user a prompt where they will be able to choose the OS or kernel to be booted, but if the user lets the timeout expire, the boot loader uses a previously defined default operating system to boot the system.

An automated system-build script is another example. I wrote one to perform an automated system build while running from a bootable CD. This script would allow the user to choose how to build the system. If there were no ...

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Publisher Resources

ISBN: 9781430218418Purchase book