access \*- test file access permission
(access = 33.; not in assembler)
points to a null-terminated string naming
is an integer less than or equal to 7.
tests to see if the real user id of the current
process has the specified access permissions on
The desired access permissions for
are constructed by adding 4 for read access, 2 for write
access, and 1 for execute access.
is set if the file cannot be found or the permission is not granted.
From C, a \*-1 return indicates an error.