This library routine uses an extension of the
.Xr sigaction 2
system call that is not available in
-.Bx 4.2 ,
-hence it should not be used if backward compatibility is needed.
+.Bx 4.2 ;
+hence, it should not be used if backward compatibility is needed.
.Sh RETURN VALUES
.Rv -std siginterrupt
.Sh ERRORS