1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
DUP errno: 0 f: 1 f2,f3: 1 close(f1): 0 close(f2): 0 close(f3): 0 DUP2 errno: 0 f: 1 f2,f3: 1 close(f1): 0 close(f2): 0 close(f3): -1