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

1.1     ! root        1: .TH READ 2
        !             2: .CT 2 file_io comm_proc
        !             3: .SH NAME
        !             4: read, write \(mi read or write file
        !             5: .SH SYNOPSIS
        !             6: .nf
        !             7: .B int read(fildes, buffer, nbytes)
        !             8: .B char *buffer;
        !             9: .PP
        !            10: .B int write(fildes, buffer, nbytes)
        !            11: .B char *buffer;
        !            12: .fi
        !            13: .SH DESCRIPTION
        !            14: .I Read
        !            15: reads
        !            16: .I nbytes
        !            17: bytes of data
        !            18: from the file pointer location in the file associated with
        !            19: .I fildes
        !            20: into memory at
        !            21: .IR buffer .
        !            22: The file pointer is advanced by the number of bytes read.
        !            23: It is not guaranteed
        !            24: that all
        !            25: .I nbytes
        !            26: bytes will be read; for example
        !            27: if the file refers to a terminal at most one line
        !            28: will be returned.
        !            29: In any event the number of characters read is returned.
        !            30: A return value of
        !            31: 0 is conventionally interpreted as end of file.
        !            32: .PP
        !            33: .I Write
        !            34: writes
        !            35: .I nbytes
        !            36: bytes of data starting at
        !            37: .I buffer
        !            38: to the file associated with
        !            39: .I fildes
        !            40: at the file pointer location.
        !            41: The file pointer is advanced by the number of bytes written.
        !            42: The number of characters actually written is returned.
        !            43: It should be regarded as an error
        !            44: if this is not the same as requested.
        !            45: .PP
        !            46: Reads and writes which are aligned with file system blocks
        !            47: are more efficient than others; see
        !            48: .IR filsys (5).
        !            49: .SH "SEE ALSO"
        !            50: .IR open (2), 
        !            51: .IR dup (2),
        !            52: .IR pipe (2),
        !            53: .IR select (2),
        !            54: .IR dirread (2)
        !            55: .SH DIAGNOSTICS
        !            56: .IR read :
        !            57: .BR EBADF ,
        !            58: .BR EFAULT ,
        !            59: .BR EINTR ,
        !            60: .BR EINVAL ,
        !            61: .BR ENXIO
        !            62: .br
        !            63: .IR write :
        !            64: .BR EBADF ,
        !            65: .BR EFAULT ,
        !            66: .BR EINTR ,
        !            67: .BR EINVAL ,
        !            68: .BR EIO ,
        !            69: .BR ENXIO ,
        !            70: .BR EPIPE ,
        !            71: .BR EROFS
        !            72: .SH BUGS
        !            73: A
        !            74: .I read
        !            75: or a
        !            76: .I write
        !            77: call may fail because of a prior call to
        !            78: .IR lseek (2).

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