Have you ever wanted a way to make your system audibly alert you when something [interesting,good,bad] happens? Using a very simple C-program, you can. I've configured my Linux box to beep when users login, and when the system restarts. With a little work, you can also configure a Bash script to call beep if Apache encounters a 403 Forbidden error. I use this a lot when running a long build; I'll start the build such that it will "beep" when it's done, I'll go do something else, and wait for the audible alert before I return to my system. Multitasking at its finest. Continue reading for the code.
Here's the C code. Note you need to be root to run it, or configure sudoers accordingly.
To compile, run:
#/> gcc -o beep beep.c
As root, run:
(root)#/> ./beep Hz Duration
First argument is frequency of the beep in Hz. The second is the duration of the beep in milliseconds. Some of my favorites include ...
When something bad happens, a low and short 100 ms flurp:
(root)#/> ./beep 300 100
When someone logs in:
(root)#/> ./beep 1000 200
If you want to see how to do this in x86 assembly, perhaps you would find this interesting.
Enjoy.
#include <stdlib.h>
#include <fcntl.h>
#include <linux/kd.h>
int main(int argc, char *argv[]) {
int fd = open("/dev/tty10", O_RDONLY);
if (fd == -1 || argc != 3) return -1;
return ioctl(fd, KDMKTONE, (atoi(argv[2])<<16)+(1193180/atoi(argv[1])));
}
To compile, run:
#/> gcc -o beep beep.c
As root, run:
(root)#/> ./beep Hz Duration
First argument is frequency of the beep in Hz. The second is the duration of the beep in milliseconds. Some of my favorites include ...
When something bad happens, a low and short 100 ms flurp:
(root)#/> ./beep 300 100
When someone logs in:
(root)#/> ./beep 1000 200
If you want to see how to do this in x86 assembly, perhaps you would find this interesting.
Enjoy.
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