inital commit of elkscmd/beep

LICENSE

@@ -1,5 +1,5 @@
 The ELKS kernel is licensed under the GNU General Public License version 2.
 
-Software incldued beside the ELKS kernel (i.e. elkscmd) may be under different licensing terms, but all licenses are free software licenses that are legally permissible to distribute with the GPLv2 kernel code. If you are interested in the license information for a particular component, check its subdirectory or the top of its source code file(s) for its individual licensing details.
+Software included beside the ELKS kernel (i.e. elkscmd) may be under different licensing terms, but all licenses are free software licenses that are legally permissible to distribute with the GPLv2 kernel code. If you are interested in the license information for a particular component, check its subdirectory or the top of its source code file(s) for its individual licensing details.
 
 In the unlikely event that you discover a component with unclear, contradictory, or missing license information, please email Jody Bruchon <[email protected]> to resolve the issue.

elkscmd/Applications

@@ -93,6 +93,7 @@ sys_utils/sercat                :sysutil                :1200k
 sys_utils/console               :sysutil                :1200k
 #sys_utils/who                  :sysutil                :1200k
 sys_utils/unreal16              :sysutil
+sys_utils/beep                  :sysutil
 screen/screen                   :screen                 :1200k
 cron/cron                       :cron                   :1200k
 cron/crontab                    :cron                   :1200k

elkscmd/sys_utils/Makefile

@@ -34,6 +34,7 @@ PRGS = \
 	chmem \
 	clock \
 	unreal16 \
+	beep \
 	mouse \
 	sercat \
 	console \
@@ -114,6 +115,9 @@ makeboot: makeboot.o $(TINYPRINTF)
 unreal.o: $(ELKS_LIB)/unreal.S
 	$(LD) -melks-libc -mcmodel=small -c $(ELKS_LIB)/unreal.S -o unreal.o
 
+beep: beep.o
+	$(LD) $(LDFLAGS) -o beep beep.o $(LDLIBS)
+
 unreal16: unreal16.o unreal.o
 	$(LD) -melks-libc -mcmodel=small -c unreal16.S -o unreal16.o
 	$(LD) -melks-libc -mcmodel=small -nostdlib -o unreal16 unreal16.o unreal.o

elkscmd/sys_utils/beep.c

@@ -0,0 +1,60 @@
+/* beep - This file is part of the ELKS project
+ * authors: Florian Zimmermann et al.
+ * Free software "as-is"
+ * Takes one optional parameter: the beep duration
+ */
+#include "stdio.h"
+#include "stdlib.h"
+#include "unistd.h"
+#include "signal.h"
+#include "arch/io.h"
+
+static void beep(int freq)
+{
+    //Set the PIT to the desired frequency
+    unsigned int d = 1193180 / freq;
+    outb(0xb6, 0x43);
+    outb((unsigned int)(d), 0x42);
+    outb((unsigned int)(d >> 8), 0x42);
+
+    //And play the sound using the PC speaker
+    unsigned int tmp = inb(0x61);
+    if (tmp != (tmp | 3)) {
+        outb(tmp | 3, 0x61);
+    }
+}
+
+static void silent()
+{
+    unsigned int tmp = inb(0x61) & 0xFC;
+    outb(tmp, 0x61);
+}
+
+void beep_signal(int sig)
+{
+    switch(sig) {
+	case SIGKILL: /* I'm falling */
+	case SIGTERM: /* I'm falling */
+        case SIGINT:
+            silent();
+            exit(sig);
+    }
+}
+
+int main(int ac, char **av)
+{
+    long duration = 333L;
+    if(ac >= 2) {
+        duration = atoi(av[1]);
+    }
+
+    signal(SIGKILL, beep_signal);
+    signal(SIGINT,  beep_signal);
+    signal(SIGTERM, beep_signal);
+
+    beep(1000);
+    usleep(duration * 1000L);
+    silent();
+
+    return 0;
+}

qemu.sh

@@ -110,11 +110,14 @@ NET="-netdev user,id=mynet,$FWD -device ne2k_isa,irq=12,netdev=mynet"
 # Enable network dump here:
 # NETDUMP="-net dump"
 
+# Enable PC-Speaker here:
+AUDIO="-audiodev pa,id=speaker -machine pcspk-audiodev=speaker"
+
 # Determine display type ("Darwin" = OSX)
 [ `uname` != 'Darwin' ] && QDISPLAY="-display sdl"
 
 # Configure QEMU as pure ISA system
 
-exec $QEMU $CONSOLE -nodefaults -name ELKS -machine isapc -cpu 486,tsc -m 4M \
+exec $QEMU $AUDIO $CONSOLE -nodefaults -name ELKS -machine isapc -cpu 486,tsc -m 4M \
 $KEYBOARD $QDISPLAY -vga std -rtc base=utc $SERIAL \
 $NET $NETDUMP $IMAGE $DISK2 $@