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/* vi: set sw=4 ts=4: */
/*
* beep implementation for busybox
*
* Copyright (C) 2009 Bernhard Reutner-Fischer
*
* Licensed under the GPL v2 or later, see the file LICENSE in this tarball.
*
*/
#include "libbb.h"
#include <linux/kd.h>
#ifndef CLOCK_TICK_RATE
#define CLOCK_TICK_RATE 1193180
#endif
#define OPT_f (1<<0)
#define OPT_l (1<<1)
#define OPT_d (1<<2)
#define OPT_r (1<<3)
/* defaults */
#define FREQ (4440)
#define LENGTH (50)
#define DELAY (0)
#define REPETITIONS (1)
#define GET_ARG do { if (!*++opt) opt = *++argv; if (opt == NULL) bb_show_usage();} while (0)
#define NEW_BEEP() { \
freq = FREQ; \
length = LENGTH; \
delay = DELAY; \
rep = REPETITIONS; \
}
int beep_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
int beep_main(int argc UNUSED_PARAM, char **argv)
{
int speaker = get_console_fd_or_die();
unsigned freq, length, delay, rep;
unsigned long ioctl_arg;
char *opt = NULL;
bool do_parse = true;
NEW_BEEP()
while (*argv && *++argv) {
opt = *argv;
while (*opt == '-')
++opt;
if (do_parse)
switch (*opt) {
case 'f':
GET_ARG;
freq = xatoul(opt);
continue;
case 'l':
GET_ARG;
length = xatoul(opt);
continue;
case 'd':
GET_ARG;
delay = xatoul(opt);
continue;
case 'r':
GET_ARG;
rep = xatoul(opt);
continue;
case 'n':
break;
default:
bb_show_usage();
break;
}
again:
while (rep) {
//bb_info_msg("rep[%d] freq=%d, length=%d, delay=%d", rep, freq, length, delay);
ioctl_arg = (int)(CLOCK_TICK_RATE/freq);
xioctl(speaker, KIOCSOUND, (void*)ioctl_arg);
usleep(1000 * length);
ioctl(speaker, KIOCSOUND, 0);
if (rep--)
usleep(delay);
}
if (opt && *opt == 'n')
NEW_BEEP()
if (!do_parse && *argv == NULL)
goto out;
}
do_parse = false;
goto again;
out:
if (ENABLE_FEATURE_CLEAN_UP)
close(speaker);
return EXIT_SUCCESS;
}
/*
* so, e.g. Beethoven's 9th symphony "Ode an die Freude" would be
* something like:
a=$((220*3))
b=$((247*3))
c=$((262*3))
d=$((294*3))
e=$((329*3))
f=$((349*3))
g=$((392*3))
#./beep -f$d -l200 -r2 -n -f$e -l100 -d 10 -n -f$c -l400 -f$g -l200
./beep -f$e -l200 -r2 \
-n -d 100 -f$f -l200 \
-n -f$g -l200 -r2 \
-n -f$f -l200 \
-n -f$e -l200 \
-n -f$d -l200 \
-n -f$c -l200 -r2 \
-n -f$d -l200 \
-n -f$e -l200 \
-n -f$e -l400 \
-n -f$d -l100 \
-n -f$d -l200 \
*/
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