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Top Forums Programming How do you detect keystrokes in canonical mode? Post 302573674 by Ultrix on Tuesday 15th of November 2011 08:33:09 AM
Old 11-15-2011
How do you detect keystrokes in canonical mode?

I'm writing a command shell, and I want to be able to detect when the user presses an arrow key (otherwise it just prints [[A, [[B, etc.). I know it's relatively easy (although somewhat more time-consuming) to detect keystrokes in noncanonical mode, but I've noticed that the bash shell detects arrow keys in canonical mode. Originally I thought that there was some process signal that the shell receives when an escaped character is entered, but I've tested all the process signals in signal.h (defined in bits/signum.h) and none of them get sent when I press the arrow keys. How can you detect arrow keys in canonical mode?
 

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exsample(3alleg4)						  Allegro manual						 exsample(3alleg4)

NAME
exsample - Playing digital samples. Allegro game programming library. SYNOPSIS
#include <allegro.h> Example exsample DESCRIPTION
This program demonstrates how to play samples. You have to use this example from the command line to specify as first parameter a WAV or VOC sound file to play. If the file is loaded successfully, the sound will be played in an infinite loop. While it is being played, you can use the left and right arrow keys to modify the panning of the sound. You can also use the up and down arrow keys to modify the pitch. SEE ALSO
END_OF_MAIN(3alleg4), SAMPLE(3alleg4), SCREEN_H(3alleg4), SCREEN_W(3alleg4), adjust_sample(3alleg4), allegro_error(3alleg4), alle- gro_init(3alleg4), allegro_message(3alleg4), clear_to_color(3alleg4), desktop_palette(3alleg4), destroy_sample(3alleg4), font(3alleg4), install_keyboard(3alleg4), install_sound(3alleg4), install_timer(3alleg4), key(3alleg4), load_sample(3alleg4), makecol(3alleg4), play_sam- ple(3alleg4), poll_keyboard(3alleg4), rest(3alleg4), screen(3alleg4), set_gfx_mode(3alleg4), set_palette(3alleg4), textprintf_cen- tre_ex(3alleg4) Allegro version 4.4.2 exsample(3alleg4)
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