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We now turn to consider the case where a program wishes to reference a file which already exists.
“namei” is called (5770) with a second parameter of zero to locate the named file. (“u.u_arg[0]” contains the address in the user space of a character string which defines a file path name.)
“u.u_arg[1]” has to be incremented by one, because there is a mismatch between the user programming conventions and the internal data representations.)
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