--- /dev/null
+#define NSIG 17
+
+#define SIGHUP 1 /* hangup */
+#define SIGINT 2 /* interrupt */
+#define SIGQUIT 3 /* quit */
+#define SIGILL 4 /* illegal instruction (not reset when caught) */
+#define SIGTRAP 5 /* trace trap (not reset when caught) */
+#define SIGIOT 6 /* IOT instruction */
+#define SIGEMT 7 /* EMT instruction */
+#define SIGFPE 8 /* floating point exception */
+#define SIGKILL 9 /* kill (cannot be caught or ignored) */
+#define SIGBUS 10 /* bus error */
+#define SIGSEGV 11 /* segmentation violation */
+#define SIGSYS 12 /* bad argument to system call */
+#define SIGPIPE 13 /* write on a pipe with no one to read it */
+#define SIGALRM 14 /* alarm clock */
+#define SIGTERM 15 /* software termination signal from kill */
+
+int (*signal())();
+#define SIG_DFL (int (*)())0
+#define SIG_IGN (int (*)())1