F_OK(/readable): 0
errno: 0
R_OK(/readable): 0
errno: 0
X_OK(/readable): 0
errno: 0
W_OK(/readable): -1
errno: 13

F_OK(/writeable): 0
errno: 0
R_OK(/writeable): -1
errno: 13
X_OK(/writeable): -1
errno: 13
W_OK(/writeable): 0
errno: 0

F_OK(/allaccess): 0
errno: 0
R_OK(/allaccess): 0
errno: 0
X_OK(/allaccess): 0
errno: 0
W_OK(/allaccess): 0
errno: 0

F_OK(/forbidden): 0
errno: 0
R_OK(/forbidden): -1
errno: 13
X_OK(/forbidden): -1
errno: 13
W_OK(/forbidden): -1
errno: 13

F_OK(/nonexistent): -1
errno: 2
R_OK(/nonexistent): -1
errno: 2
X_OK(/nonexistent): -1
errno: 2
W_OK(/nonexistent): -1
errno: 2