]> granicus.if.org Git - strace/blob - tests/mmsg.c
Use printnum_int64 instead of print_loff_t
[strace] / tests / mmsg.c
1 #ifdef HAVE_CONFIG_H
2 # include "config.h"
3 #endif
4 #include <sys/socket.h>
5 #include <unistd.h>
6 #include <fcntl.h>
7 #include <errno.h>
8 #include <assert.h>
9
10 int
11 main(void)
12 {
13 #if defined(HAVE_SENDMMSG) && defined(HAVE_STRUCT_MMSGHDR)
14         const int R = 0, W = 1;
15         int fd;
16         int sv[2];
17         char one[] = "one";
18         char two[] = "two";
19         char three[] = "three";
20
21         struct iovec iov[] = {
22                 {
23                         .iov_base = one,
24                         .iov_len = sizeof(one) - 1
25                 }, {
26                         .iov_base = two,
27                         .iov_len = sizeof(two) - 1
28                 }, {
29                         .iov_base = three,
30                         .iov_len = sizeof(three) - 1
31                 }
32         };
33
34         struct mmsghdr mmh[] = {
35                 {
36                         .msg_hdr = {
37                                 .msg_iov = iov + 0,
38                                 .msg_iovlen = 2,
39                         }
40                 }, {
41                         .msg_hdr = {
42                                 .msg_iov = iov + 2,
43                                 .msg_iovlen = 1,
44                         }
45                 }
46         };
47 #define n_mmh (sizeof(mmh)/sizeof(mmh[0]))
48
49         /*
50          * Following open/dup2/close calls make the output of strace
51          * more predictable, so we can just compare the output and
52          * expected output (mmsg.expected) for testing purposes.
53          */
54         while ((fd = open("/dev/null", O_RDWR)) < 3)
55                 assert(fd >= 0);
56         (void) close(3);
57
58         assert(socketpair(AF_UNIX, SOCK_DGRAM, 0, sv) == 0);
59
60         assert(dup2(sv[W], W) == W);
61         assert(close(sv[W]) == 0);
62         assert(dup2(sv[R], R) == R);
63         assert(close(sv[R]) == 0);
64
65         int r = sendmmsg(W, mmh, n_mmh, 0);
66         if (r < 0 && errno == ENOSYS)
67                 return 77;
68         assert((size_t)r == n_mmh);
69         assert(close(W) == 0);
70
71         assert(recvmmsg(R, mmh, n_mmh, 0, NULL) == n_mmh);
72         assert(close(R) == 0);
73
74         return 0;
75 #else
76         return 77;
77 #endif
78 }