1 /*	$OpenBSD: readv.c,v 1.1 2011/09/13 23:50:17 fgsch Exp $	*/
2 /*
3  * Federico G. Schwindt <fgsch@openbsd.org>, 2011. Public Domain.
4  */
5 #include <sys/types.h>
6 #include <sys/uio.h>
7 #include <pthread.h>
8 #include <signal.h>
9 #include <unistd.h>
10 #include "test.h"
11 
12 volatile sig_atomic_t hits = 0;
13 
14 void
15 handler(int sig)
16 {
17 	hits++;
18 }
19 
20 void *
21 thr_readv(void *arg)
22 {
23 	struct iovec iov;
24 	int fds[2];
25 	char buf;
26 
27 	CHECKe(pipe(fds));
28 	iov.iov_base = &buf;
29 	iov.iov_len = 1;
30 	ASSERT(readv(fds[0], &iov, 1) == -1);
31 	return ((caddr_t)NULL + errno);
32 }
33 
34 int
35 main(int argc, char **argv)
36 {
37 	struct sigaction sa;
38 	pthread_t tid;
39 	void *retval;
40 
41 	bzero(&sa, sizeof(sa));
42 	sa.sa_handler = handler;
43 	sa.sa_flags = SA_RESTART;
44 	CHECKe(sigaction(SIGUSR1, &sa, NULL));
45 	sa.sa_flags = 0;
46 	CHECKe(sigaction(SIGUSR2, &sa, NULL));
47 
48 	CHECKr(pthread_create(&tid, NULL, thr_readv, NULL));
49 	sleep(2);
50 
51 	/* Should restart it. */
52 	CHECKr(pthread_kill(tid, SIGUSR1));
53 	sleep(1);
54 
55 	/* Should interrupt it. */
56 	CHECKr(pthread_kill(tid, SIGUSR2));
57 	sleep(1);
58 
59 	CHECKr(pthread_join(tid, &retval));
60 	ASSERT(retval == (void *)EINTR);
61 	ASSERT(hits == 2);
62 	SUCCEED;
63 }
64