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Name

timer - counts down to zero from a user supplied number.

Description

Displays a count down to zero from a number supplied by the user at the command line. Supports pausing and unpausing the countdown.

Countdown is done by ones, one second at a time.

While the program is runnng, typing p will pause the countdown and typing u will unpause it. echoing of characters is disabled while the program is running.

Sample Usage

timer 60 begins the countdown

Hints

man 3 sleep

uses struct termios

uses VSTART and VSTOP