_W_INT
#define _WSTATUS(x) (_W_INT(x) & 0177)
#define WIFCONTINUED(x) (_W_INT(x) == _WCONTINUED)
#define WSTOPSIG(x) ((int)(((unsigned int)_W_INT(x)) >> 8) & 0xff)
#define WEXITSTATUS(x) ((int)(((unsigned int)_W_INT(x)) >> 8) & 0xff)
#define WCOREDUMP(x) (_W_INT(x) & WCOREFLAG)