Need to clear the keyboard buffer


 
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Operating Systems AIX Need to clear the keyboard buffer
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Old 12-20-2011
Need to clear the keyboard buffer

I'm running a ksh script that requires user interaction, and said users (myself among them) may get a little trigger happy and get ahead of ourselves and accidentally key in the wrong responses to future prompts in the script.

Naturally, I'd like to prevent that, so how does one clear that buffer prior to the ensuing read command?
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keyboard_update(3)						Svgalib User Manual						keyboard_update(3)

NAME
keyboard_update, keyboard_waitforupdate - process raw keyboard events SYNOPSIS
#include <vgakeyboard.h> int keyboard_update(void); void keyboard_waitforupdate(void); DESCRIPTION
These routines check the keyboard buffer for any raw keyboard events and do the necessary updates to the internal buffers of key- board_clearstate(3) and keyboard_keypressed(3). When there are no such events, keyboard_update() returns 0 immediately (non-zero else) whereas keyboard_waitforupdate() blocks and waits until an event occurs. vga_waitevent(3) allows to wait for keyboard and other events at the same time. SEE ALSO
svgalib(7), vgagl(7), libvga.config(5), keytest(6), eventtest(6), keyboard_seteventhandler(3), keyboard_init(3), key- board_init_return_fd(3), keyboard_close(3), keyboard_setdefaulteventhandler(3), keyboard_getstate(3), keyboard_clearstate(3), key- board_translatekeys(3), keyboard_keypressed(3), vga_waitevent(3) AUTHOR
This manual page was edited by Michael Weller <eowmob@exp-math.uni-essen.de>. The exact source of the referenced function as well as of the original documentation is unknown. It is very likely that both are at least to some extent are due to Harm Hanemaayer <H.Hanemaayer@inter.nl.net>. Occasionally this might be wrong. I hereby asked to be excused by the original author and will happily accept any additions or corrections to this first version of the svgalib manual. Svgalib (>;= 1.2.11) 27 July 1997 keyboard_update(3)