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