Add build system scaffolding and libc headers

1 files changed, 14 insertions, 0 deletions

diff --git a/lib/libc/signal/signal.c b/lib/libc/signal/signal.c
new file mode 100644
index 00000000..c2f578eb
--- /dev/null
+++ b/lib/libc/signal/signal.c
@@ -0,0 +1,14 @@
+#include <signal.h>
+
+void (*signal(int sig, void (*func)(int)))(int)
+{
+	struct sigaction act, oact;
+
+	act.sa_handler = func;
+	act.sa_flags = SA_RESTART;
+
+	if (sigaction(sig, &act, &oact) < 0)
+		return SIG_ERR;
+
+	return oact.sa_handler;
+}