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
handler(int sig)15 handler(int sig)
16 {
17 hits++;
18 }
19
20 void *
thr_readv(void * arg)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
main(int argc,char ** argv)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