Initial revision

mach/sun3/libsys/sigvec.c

@@ -0,0 +1,35 @@
+#include "syscall.h"
+#include <errno.h>
+struct sigvec { int (*handler)(); int mask,flags; };
+int (*(_sigfunc[32]))();
+extern int _sigtramp();
+
+sigvec(sig,vec,ovec)
+	register struct sigvec *vec;
+	struct sigvec *ovec;
+{
+	struct sigvec tmp;
+	int (*old)();
+
+	if ((unsigned) sig >= 32) {
+		errno = EINVAL;
+		return -1;
+	}
+	old = _sigfunc[sig];
+	if (vec) {
+		tmp = *vec;
+		vec = &tmp;
+		if (vec->handler && vec->handler != (int (*)()) 1) {
+			_sigfunc[sig] = vec->handler;
+			vec->handler = _sigtramp;
+		}
+	}
+	if (syscall(SYS_sigvec,sig,vec,ovec) < 0) {
+		_sigfunc[sig] = old;
+		return -1;
+	}
+	if (ovec->handler == _sigtramp) {
+		ovec->handler = old;
+	}
+	return 0;
+}