1/*
2 * Copyright (c) 2015-2016 Dmitry V. Levin <ldv@altlinux.org>
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 * 3. The name of the author may not be used to endorse or promote products
14 *    derived from this software without specific prior written permission.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 */
27
28/*
29 * Based on test by Dr. David Alan Gilbert <dave@treblig.org>
30 */
31
32#include "tests.h"
33#include "nsig.h"
34#include <assert.h>
35#include <stdio.h>
36#include <unistd.h>
37#include <sys/select.h>
38#include <asm/unistd.h>
39#include <sys/time.h>
40
41#ifdef __NR_pselect6
42
43static fd_set set[3][0x1000000 / sizeof(fd_set)];
44
45static void
46handler(int signo)
47{
48}
49
50int main(int ac, char **av)
51{
52	int fds[2];
53	struct {
54		struct timespec ts;
55		int pad[2];
56	} tm_in = {
57		.ts = { .tv_sec = 0xc0de1, .tv_nsec = 0xc0de2 },
58		.pad = { 0xdeadbeef, 0xbadc0ded }
59	}, tm = tm_in;
60	sigset_t mask;
61	const struct sigaction act = { .sa_handler = handler };
62	const struct itimerval itv = { .it_value.tv_usec = 111111 };
63
64	sigemptyset(&mask);
65	sigaddset(&mask, SIGHUP);
66	sigaddset(&mask, SIGCHLD);
67
68	if (pipe(fds))
69		perror_msg_and_fail("pipe");
70
71	/*
72	 * Start with a nice simple pselect.
73	 */
74	FD_SET(fds[0], set[0]);
75	FD_SET(fds[1], set[0]);
76	FD_SET(fds[0], set[1]);
77	FD_SET(fds[1], set[1]);
78	FD_SET(1, set[2]);
79	FD_SET(2, set[2]);
80	int rc = pselect(fds[1] + 1, set[0], set[1], set[2], NULL, NULL);
81	if (rc < 0)
82		perror_msg_and_skip("pselect");
83	assert(rc == 1);
84	printf("pselect6(%d, [%d %d], [%d %d], [1 2], NULL, {NULL, %u}) "
85	       "= 1 (out [%d])\n",
86	       fds[1] + 1, fds[0], fds[1],
87	       fds[0], fds[1],
88	       NSIG_BYTES, fds[1]);
89
90	/*
91	 * Another simple one, with a timeout.
92	 */
93	FD_SET(1, set[1]);
94	FD_SET(2, set[1]);
95	FD_SET(fds[0], set[1]);
96	FD_SET(fds[1], set[1]);
97	assert(syscall(__NR_pselect6, fds[1] + 1, NULL, set[1], NULL, &tm.ts, NULL) == 3);
98	printf("pselect6(%d, NULL, [1 2 %d %d], NULL, "
99	       "{tv_sec=%lld, tv_nsec=%lld}, NULL) = 3 (out [1 2 %d], left "
100	       "{tv_sec=%lld, tv_nsec=%lld})\n",
101	       fds[1] + 1, fds[0], fds[1],
102	       (long long) tm_in.ts.tv_sec, (long long) tm_in.ts.tv_nsec,
103	       fds[1],
104	       (long long) tm.ts.tv_sec, (long long) tm.ts.tv_nsec);
105
106	/*
107	 * Now the crash case that trinity found, negative nfds
108	 * but with a pointer to a large chunk of valid memory.
109	 */
110	FD_ZERO(set[0]);
111	FD_SET(fds[1],set[0]);
112	assert(pselect(-1, NULL, set[0], NULL, NULL, &mask) == -1);
113	printf("pselect6(-1, NULL, %p, NULL, NULL, {[HUP CHLD], %u}) "
114	       "= -1 EINVAL (%m)\n", set[0], NSIG_BYTES);
115
116	/*
117	 * Another variant, with nfds exceeding FD_SETSIZE limit.
118	 */
119	FD_ZERO(set[0]);
120	FD_SET(fds[0],set[0]);
121	FD_ZERO(set[1]);
122	tm.ts.tv_sec = 0;
123	tm.ts.tv_nsec = 123;
124	assert(pselect(FD_SETSIZE + 1, set[0], set[1], NULL, &tm.ts, &mask) == 0);
125	printf("pselect6(%d, [%d], [], NULL, {tv_sec=0, tv_nsec=123}, "
126	       "{[HUP CHLD], %u}) = 0 (Timeout)\n",
127	       FD_SETSIZE + 1, fds[0], NSIG_BYTES);
128
129	/*
130	 * See how timeouts are decoded.
131	 */
132	assert(sigaction(SIGALRM, &act, NULL) == 0);
133	assert(setitimer(ITIMER_REAL, &itv, NULL) == 0);
134
135	tm.ts.tv_nsec = 222222222;
136	assert(pselect(0, NULL, NULL, NULL, &tm.ts, &mask) == -1);
137	printf("pselect6(0, NULL, NULL, NULL, {tv_sec=0, tv_nsec=222222222}, "
138	       "{[HUP CHLD], %u}) = "
139	       "? ERESTARTNOHAND (To be restarted if no handler)\n",
140	       NSIG_BYTES);
141	puts("--- SIGALRM {si_signo=SIGALRM, si_code=SI_KERNEL} ---");
142
143	puts("+++ exited with 0 +++");
144	return 0;
145}
146
147#else
148
149SKIP_MAIN_UNDEFINED("__NR_pselect6")
150
151#endif
152