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help with bash

Started by 31337noob Sep 13, 2006 at 9:48 PM 2 replies 1k views

Original Post

Sep 13, 2006 at 9:48 PM

hi, i am making a bash script in linux and i want to know is there a way if i can tell if a key has been hit. i dont want the terminal waiting for a keypress. i would do this in c++, but i dont think kbhit() works in linux because g++ gives the error: 'kbhit' was not declared in this scope. any help would be good. thanks in advanced.

31337noob

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31337noob

Sep 13, 2006 at 10:31 PM

well, i am making an alarm clock.

crontab takes care of the time.

when it is time, it runs a bashscript

and that bashscript

opens konsole

and runs mplayer with a song

it will repeat untill a key has been pressed

and i just want to know how to get that key press without the konsole waiting for a keypress.

Bregma

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Bregma

Sep 14, 2006 at 10:07 AM

Quote:
Original post by 31337noob
well, i am making an alarm clock.
crontab takes care of the time.
when it is time, it runs a bashscript
and that bashscript opens konsole and runs mplayer with a song

Why not just have your cron job run mplayer directly, and have the user close the mplayer window instead?

As for your original question, the answer is that you'll have to put the controlling tty in raw mode and do a read on file descriprot zero. You'll want to have an exit function hooked in to your script to reset the tty mode.

Something like this (untested)

cleanup(){  stty -raw}trap cleanup 0stty rawmplayer playfile &read somechar

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