add simple beep applet

Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>

include/applets.h

@@ -80,6 +80,7 @@ IF_ASH(APPLET(ash, _BB_DIR_BIN, _BB_SUID_DROP))
 IF_AWK(APPLET_NOEXEC(awk, awk, _BB_DIR_USR_BIN, _BB_SUID_DROP, awk))
 IF_BASENAME(APPLET_NOFORK(basename, basename, _BB_DIR_USR_BIN, _BB_SUID_DROP, basename))
 IF_BBCONFIG(APPLET(bbconfig, _BB_DIR_BIN, _BB_SUID_DROP))
+IF_BEEP(APPLET(beep, _BB_DIR_USR_BIN, _BB_SUID_DROP))
 //IF_BBSH(APPLET(bbsh, _BB_DIR_BIN, _BB_SUID_DROP))
 IF_BLKID(APPLET(blkid, _BB_DIR_SBIN, _BB_SUID_DROP))
 IF_BRCTL(APPLET(brctl, _BB_DIR_USR_SBIN, _BB_SUID_DROP))

include/usage.h

@@ -145,6 +145,16 @@
        "$ basename /foo/bar.txt .txt\n" \
        "bar"
 
+#define beep_trivial_usage \
+       "-f freq -l length -d delay -r repetitions -n"
+#define beep_full_usage "\n\n" \
+	"Options:\n" \
+     "\n	-f	Frequency in Hz" \
+     "\n	-l	Length in ms" \
+     "\n	-d	Delay in ms" \
+     "\n	-r	Repetitions" \
+     "\n	-n	Start new tone" \
+
 #define fbsplash_trivial_usage \
        "-s IMGFILE [-c] [-d DEV] [-i INIFILE] [-f CMD]"
 #define fbsplash_full_usage "\n\n" \

miscutils/Config.in

@@ -19,6 +19,12 @@ config BBCONFIG
 	  The bbconfig applet will print the config file with which
 	  busybox was built.
 
+config BEEP
+	bool "beep"
+	default n
+	help
+	  The beep applets beeps in a given freq/Hz.
+
 config CHAT
 	bool "chat"
 	default n

miscutils/Kbuild

@@ -7,6 +7,7 @@
 lib-y:=
 lib-$(CONFIG_ADJTIMEX)    += adjtimex.o
 lib-$(CONFIG_BBCONFIG)    += bbconfig.o
+lib-$(CONFIG_BEEP)        += beep.o
 lib-$(CONFIG_CHAT)        += chat.o
 lib-$(CONFIG_CHRT)        += chrt.o
 lib-$(CONFIG_CROND)       += crond.o

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 \
+*/