ocr: he lirst: argument to open()is a file name; the second argument specifies how the file is to be opened. If there are no errors, the function returns a file descriptor; otherwise, the value-1 IS returned. The identifier in fd is mnemonic for "in file descriptor. I On our system, the symbolic constant 0 RDONLY is given in fcntl.h. It is mnemonic for "open for reading only. -
