add simple beep applet
Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>
diff --git a/miscutils/beep.c b/miscutils/beep.c
new file mode 100644
index 0000000..d5c3531
--- /dev/null
+++ b/miscutils/beep.c
@@ -0,0 +1,119 @@
+/* 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 \
+*/