1 
2 #include <sys/types.h>
3 #include <sys/event.h>
4 #include <sys/time.h>
5 #include <sys/socket.h>
6 #include <sysexits.h>
7 
8 #include <err.h>
9 #include <stdio.h>
10 #include <stdlib.h>
11 #include <unistd.h>
12 
13 int
14 main()
15 {
16     int sock[2];
17     struct kevent kc;
18     int kq;
19     char foo[1024];
20 
21     if (socketpair(PF_LOCAL, SOCK_STREAM, 0, sock) < 0)
22         err(EX_TEMPFAIL, "socketpair");
23 
24     if (write(sock[0], foo, sizeof(foo)) < 0)
25         err(EX_TEMPFAIL, "write");
26 
27     close(sock[0]);
28 
29     EV_SET(&kc, sock[1], EVFILT_READ, EV_ADD | EV_CLEAR, 0, 0, 0);
30 
31     kq = kqueue();
32     if (kevent(kq, &kc, 1, NULL, 0, NULL) < 0)
33         err(EX_TEMPFAIL, "kqueue");
34 
35     if (kevent(kq, NULL, 0, &kc, 1, NULL) < 0)
36         err(EX_TEMPFAIL, "kevent1");
37     printf("kevent1 done, flags: %04x\n", kc.flags);
38 
39     if (kc.flags & EV_EOF) {
40         printf("kevent1 reported EOF, exiting\n");
41         exit(0);
42     }
43 
44     if (kevent(kq, NULL, 0, &kc, 1, NULL) < 0)
45         err(EX_TEMPFAIL, "kevent2");
46     printf("kevent2 done, flags: %04x\n", kc.flags);
47 
48     exit(0);
49 }
50