Nucleus

diff --git a/include/sys/signal.h b/include/sys/signal.h
new file mode 100644
index 0000000..f80c669
--- /dev/null
+++ b/include/sys/signal.h
@@ -0,0 +1,48 @@
+#ifndef _SYS_SIGNAL_H
+#define _SYS_SIGNAL_H
+
+#include <sys/types.h>
+
+typedef unsigned long int __sigset_t;
+#ifndef sigset_t
+typedef __sigset_t sigset_t;
+#endif
+#ifndef sig_atomic_t
+typedef int sig_atomic_t;
+#endif
+
+typedef void (*sighandler_t)(int);
+
+#define SIG_ERR (sighandler_t) -1
+#define SIG_IGNORE 0
+#define SIG_DFL 1
+#define SIG_BLOCK 2
+#define SIG_UNBLOCK 3
+#define SIG_SETMASK 4
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+enum Signal {
+	SIGHUP = 1,
+	SIGINT,
+	SIGQUIT,
+	SIGILL,
+	SIGABRT,
+	SIGFPE,
+	SIGKILL,
+	SIGSEGV,
+	SIGPIPE,
+};
+
+int tgkill(pid_t tgid, pid_t tid, int sig);
+int kill(pid_t pid, int sig);
+sighandler_t signal(int signum, sighandler_t handler);
+int sigprocmask(int how, const sigset_t *set, sigset_t *oldset);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif