1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
|
/*
* Check decoding and dumping of sendto and recvfrom syscalls.
*
* Copyright (c) 2015-2016 Dmitry V. Levin <ldv@strace.io>
* Copyright (c) 2016-2021 The strace developers.
* All rights reserved.
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
#include "tests.h"
#include <assert.h>
#include <string.h>
#include <unistd.h>
#include <sys/socket.h>
#include <sys/wait.h>
static void
transpose(char *str, int len)
{
for (int i = 0; i < len / 2; ++i) {
char c = str[i];
str[i] = str[len - 1 - i];
str[len - 1 - i] = c;
}
}
int
main(int ac, char **av)
{
assert(ac == 2);
const int len = strlen(av[1]);
assert(len);
(void) close(0);
(void) close(1);
int sv[2];
if (socketpair(AF_UNIX, SOCK_STREAM, 0, sv))
perror_msg_and_skip("socketpair");
pid_t pid = fork();
if (pid < 0)
perror_msg_and_fail("fork");
if (pid) {
assert(close(1) == 0);
transpose(av[1], len);
assert(sendto(0, av[1], len, MSG_DONTROUTE, NULL, 0) == len);
assert(recvfrom(0, av[1], len, MSG_WAITALL, NULL, NULL) == len);
assert(close(0) == 0);
int status;
assert(waitpid(pid, &status, 0) == pid);
assert(status == 0);
} else {
assert(close(0) == 0);
assert(recvfrom(1, av[1], len, MSG_WAITALL, NULL, NULL) == len);
transpose(av[1], len);
assert(sendto(1, av[1], len, MSG_DONTROUTE, NULL, 0) == len);
assert(recvfrom(1, av[1], len, MSG_WAITALL, NULL, NULL) == 0);
assert(close(1) == 0);
}
return 0;
}
|
