Kernel: Add a beep() syscall that beeps the PC speaker.

Hook this up in Terminal so that the '\a' character generates a beep.
Finally emit an '\a' character in the shell line editing code when
backspacing at the start of the line.

2 files changed, 6 insertions, 0 deletions

diff --git a/LibC/unistd.cpp b/LibC/unistd.cpp
index e07463d9bf..baa99bbd5d 100644
--- a/LibC/unistd.cpp
+++ b/LibC/unistd.cpp
@@ -475,4 +475,9 @@ int donate(int tid)
     __RETURN_WITH_ERRNO(rc, rc, -1);
 }
 
+void beep()
+{
+    syscall(SC_beep);
+}
+
 }
diff --git a/LibC/unistd.h b/LibC/unistd.h
index 172cbcd8a1..b184a5a435 100644
--- a/LibC/unistd.h
+++ b/LibC/unistd.h
@@ -14,6 +14,7 @@ __BEGIN_DECLS
 
 extern char** environ;
 
+void beep();
 int systrace(pid_t);
 int gettid();
 int donate(int tid);