WTRAPPED
if ((options & (WTRAPPED|WSTOPPED)) != 0 &&
options |= WEXITED | WTRAPPED;
#define WSELECTOPTS (WEXITED|WUNTRACED|WCONTINUED|WTRAPPED)
wait6(P_PID,(a),(b),(c)|WEXITED|WTRAPPED,NULL,NULL)
waitid(P_PID,(a),NULL,(c)|WEXITED|WTRAPPED)
WTRAPPED | WEXITED | TWAIT_OPTION, NULL, NULL) == -1);
WTRAPPED,
WTRAPPED,
WTRAPPED | WEXITED | TWAIT_OPTION) == -1);