Read data from the file specified by fd.
fd
The buffer that the data will be written to.
The offset within the buffer where writing will start.
An integer specifying the number of bytes to read.
An integer specifying where to begin reading from in the file. If position is null, data will be read from the current file position.
Optional
Read data from the file specified by
fd
.Param: buffer
The buffer that the data will be written to.
Param: offset
The offset within the buffer where writing will start.
Param: length
An integer specifying the number of bytes to read.
Param: position
An integer specifying where to begin reading from in the file. If position is null, data will be read from the current file position.