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Annotation of researchv10dc/man/adm/man2/pipe.2, revision 1.1

1.1     ! root        1: .TH PIPE 2
        !             2: .CT 2 comm_proc
        !             3: .SH NAME
        !             4: pipe \(mi create an interprocess channel
        !             5: .SH SYNOPSIS
        !             6: .nf
        !             7: .B int pipe(fildes)
        !             8: .B int fildes[2];
        !             9: .fi
        !            10: .SH DESCRIPTION
        !            11: .I Pipe
        !            12: creates a buffered channel for interprocess I/O communication.
        !            13: Two file descriptors returned in
        !            14: .I fildes
        !            15: are the ends of pair of cross-connected streams;
        !            16: see
        !            17: .IR stream (4).
        !            18: Data written via
        !            19: .B fildes[1]
        !            20: is available for reading via
        !            21: .B fildes[0]
        !            22: and vice versa.
        !            23: .PP
        !            24: After the pipe has been set up,
        !            25: cooperating processes
        !            26: created by subsequent
        !            27: .IR fork (2)
        !            28: calls may pass data through the
        !            29: pipe with
        !            30: .I read
        !            31: and
        !            32: .I write
        !            33: calls.
        !            34: The bytes placed on a pipe
        !            35: by one 
        !            36: .I write
        !            37: are contiguous even if many process are writing.
        !            38: .I Writes
        !            39: induce a record structure: a
        !            40: .I read
        !            41: will not return bytes from more than one 
        !            42: .IR write ;
        !            43: see
        !            44: .IR read (2).
        !            45: .PP
        !            46: Write calls on a one-ended pipe raise signal
        !            47: .BR SIGPIPE .
        !            48: Read calls on a one-ended pipe with no data in it
        !            49: return an end-of-file for the first several attempts, then raise
        !            50: .BR SIGPIPE ,
        !            51: and eventually
        !            52: .BR SIGKILL .
        !            53: .SH "SEE ALSO"
        !            54: .IR sh (1), 
        !            55: .IR fork (2),
        !            56: .IR read (2),
        !            57: .IR select (2),
        !            58: .IR stream (4)
        !            59: .SH DIAGNOSTICS
        !            60: .BR EIO ,
        !            61: .BR EMFILE ,
        !            62: .BR ENFILE ,
        !            63: .BR ENXIO
        !            64: .SH BUGS
        !            65: Buffering in pipes connecting multiple processes may cause deadlocks.
        !            66: .PP
        !            67: Some line discipline modules
        !            68: discard the record delimiters
        !            69: inserted by
        !            70: .IR write .
        !            71: .PP
        !            72: On many other versions of the system,
        !            73: only
        !            74: .B fildes[0]
        !            75: may be read
        !            76: and only
        !            77: .B fildes[1]
        !            78: may be written.

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