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#define _W_INT(i) (i)
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#define _WSTATUS(x) (_W_INT(x) & 0177)
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#define _WSTOPPED 0177 /* _WSTATUS if process is stopped */
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#define WIFSTOPPED(x) (_WSTATUS(x) == _WSTOPPED)
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#define WSTOPSIG(x) (_W_INT(x) >> 8)
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#define WIFSIGNALED(x) (_WSTATUS(x) != _WSTOPPED && _WSTATUS(x) != 0 && (x) != 0x13)
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#define WTERMSIG(x) (_WSTATUS(x))
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#define WIFEXITED(x) (_WSTATUS(x) == 0)
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#define WEXITSTATUS(x) (_W_INT(x) >> 8)
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#define WIFCONTINUED(x) (x == 0x13) /* 0x13 == SIGCONT */
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#if __BSD_VISIBLE
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#define WCOREDUMP(x) (_W_INT(x) & WCOREFLAG)
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#define W_EXITCODE(ret, sig) ((ret) << 8 | (sig))
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#define W_STOPCODE(sig) ((sig) << 8 | _WSTOPPED)
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#endif
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/*
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* Option bits for the third argument of wait4. WNOHANG causes the
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* wait to not hang if there are no stopped or terminated processes, rather
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* returning an error indication in this case (pid==0). WUNTRACED
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* indicates that the caller should receive status about untraced children
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* which stop due to signals. If children are stopped and a wait without
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* this option is done, it is as though they were still running... nothing
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* about them is returned. WNOWAIT only request information about zombie,
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* leaving the proc around, available for later waits.
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*/
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#define WNOHANG 1 /* Don't hang in wait. */
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#define WUNTRACED 2 /* Tell about stopped, untraced children. */
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#define WSTOPPED WUNTRACED /* SUS compatibility */
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#define WCONTINUED 4 /* Report a job control continued process. */
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#define WNOWAIT 8 /* Poll only. Don't delete the proc entry. */
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#define WEXITED 16 /* Wait for exited processes. */
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#define WTRAPPED 32 /* Wait for a process to hit a trap or
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a breakpoint. */
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