/sys$common/syshlp/HELPLIB.HLB  —  CRTL  pwrite  Arguments
 file_desc

    A file descriptor that refers to a file currently opened for
    writing or updating.

 buffer

    The address of contiguous storage from which the output data is
    taken.

 nbytes

    The maximum number of bytes involved in the write operation.

 offset

    The offset for the desired position inside the file.
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