1send(0, "abcdefghijklmnopqrstuvwxyz", 26, MSG_DONTROUTE) = 26 2 | 00000 61 62 63 64 65 66 67 68 69 6a 6b 6c 6d 6e 6f 70 abcdefghijklmnop | 3 | 00010 71 72 73 74 75 76 77 78 79 7a qrstuvwxyz | 4recv(1, "abcdefghijklmnopqrstuvwxyz", 26, MSG_WAITALL) = 26 5send(1, "zyxwvutsrqponmlkjihgfedcba", 26, MSG_DONTROUTE) = 26 6recv(0, "zyxwvutsrqponmlkjihgfedcba", 26, MSG_WAITALL) = 26 7 | 00000 7a 79 78 77 76 75 74 73 72 71 70 6f 6e 6d 6c 6b zyxwvutsrqponmlk | 8 | 00010 6a 69 68 67 66 65 64 63 62 61 jihgfedcba | 9recv(0, NULL, 26, MSG_DONTWAIT) = -1 EBADF (Bad file descriptor) 10+++ exited with 0 +++ 11