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Annotation of researchv10dc/dist/man/v4/man2/wait.2, revision 1.1

1.1     ! root        1: .th WAIT II 8/5/73
        !             2: .sh NAME
        !             3: wait \*- wait for process to die
        !             4: .sh SYNOPSIS
        !             5: (wait = 7.)
        !             6: .br
        !             7: .ft B
        !             8: sys  wait
        !             9: .s3
        !            10: wait(status)
        !            11: .br
        !            12: int *status;
        !            13: .ft R
        !            14: .sh DESCRIPTION
        !            15: .it Wait
        !            16: causes its caller to delay until one of its child
        !            17: processes terminates.
        !            18: If any child has died since the last
        !            19: .it wait,
        !            20: return is immediate;
        !            21: if there are no children, return is immediate with
        !            22: the error bit set
        !            23: (resp. with a value of \*-1 returned).
        !            24: In the case of several children several
        !            25: .it wait
        !            26: calls are needed
        !            27: to learn of all the deaths.
        !            28: .s3
        !            29: If no error is indicated on return,
        !            30: the r1 high byte (resp. the high byte stored into
        !            31: .it status
        !            32: ) contains the low byte of the
        !            33: child process r0 (resp. the argument of
        !            34: .it exit
        !            35: ) when it terminated.
        !            36: The r1 (resp.
        !            37: .it status
        !            38: ) low byte contains the termination status
        !            39: of the process.
        !            40: See signal(II) for
        !            41: a list of termination statuses (signals);
        !            42: 0 status indicates normal termination.
        !            43: If the 040 bit of the termination status
        !            44: is set,
        !            45: a core image of the process was produced
        !            46: by the system.
        !            47: .sh "SEE ALSO"
        !            48: exit(II), fork(II), signal(II)
        !            49: .sh DIAGNOSTICS
        !            50: The error bit
        !            51: (c-bit) on if no children not previously waited for.
        !            52: From C, a returned value of \*-1 indicates an error.

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