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    FppRead

    Positional read: read from file descriptor at a certain position.

    Declaration

    Source position: bunxh.inc line 97

    function FpPRead(fd: cint; buf: PAnsiChar; nbytes: TSize; offset: TOff)
                 : TsSize;

    function FppRead(fd: cint; var buf; nbytes: TSize; offset: TOff)
                 : TsSize;

    Description

    FpPRead reads nbytes bytes from file descriptor fd into buffer buf starting at offset offset. Offset is measured from the start of the file. This function can only be used on files, not on pipes or sockets (i.e. any seekable file descriptor).

    The function returns the number of bytes actually read, or -1 on error.

    Errors

    On error, -1 is returned.

    See also

    Name Description
    FpReadV Vector read: Read into multiple buffers.
    FpPWrite Positional write: write to file descriptor at a certain position.