1 /*
2 * Copyright (c) 2015 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 #ifdef HAVE_CONFIG_H
29 # include "config.h"
30 #endif
31
32 #include <stdio.h>
33 #include <stdint.h>
34 #include <signal.h>
35 #include <time.h>
36 #include <unistd.h>
37 #include <sys/time.h>
38 #include <sys/syscall.h>
39
40 static void
handler(int signo)41 handler(int signo)
42 {
43 }
44
45 int
main(void)46 main(void)
47 {
48 struct {
49 struct timespec ts;
50 uint32_t pad[2];
51 } req = {
52 .ts = { .tv_nsec = 0xc0de1 },
53 .pad = { 0xdeadbeef, 0xbadc0ded }
54 }, rem = {
55 .ts = { .tv_sec = 0xc0de2, .tv_nsec = 0xc0de3 },
56 .pad = { 0xdeadbeef, 0xbadc0ded }
57 };
58 const sigset_t set = {};
59 const struct sigaction act = { .sa_handler = handler };
60 const struct itimerval itv = {
61 .it_interval.tv_usec = 222222,
62 .it_value.tv_usec = 111111
63 };
64
65 if (syscall(__NR_clock_nanosleep, CLOCK_REALTIME, 0, &req.ts, NULL))
66 return 77;
67 printf("clock_nanosleep(CLOCK_REALTIME, 0, {%jd, %jd}, NULL) = 0\n",
68 (intmax_t) req.ts.tv_sec, (intmax_t) req.ts.tv_nsec);
69
70 if (!syscall(__NR_clock_nanosleep, CLOCK_REALTIME, 0, NULL, &rem.ts))
71 return 77;
72 printf("clock_nanosleep(CLOCK_REALTIME, 0, NULL, %p)"
73 " = -1 EFAULT (Bad address)\n", &rem.ts);
74
75 if (syscall(__NR_clock_nanosleep, CLOCK_REALTIME, 0, &req.ts, &rem.ts))
76 return 77;
77 printf("clock_nanosleep(CLOCK_REALTIME, 0, {%jd, %jd}, %p) = 0\n",
78 (intmax_t) req.ts.tv_sec, (intmax_t) req.ts.tv_nsec, &rem.ts);
79
80 req.ts.tv_nsec = 999999999 + 1;
81 if (!syscall(__NR_clock_nanosleep, CLOCK_MONOTONIC, 0, &req.ts, &rem.ts))
82 return 77;
83 printf("clock_nanosleep(CLOCK_MONOTONIC, 0"
84 ", {%jd, %jd}, %p) = -1 EINVAL (Invalid argument)\n",
85 (intmax_t) req.ts.tv_sec, (intmax_t) req.ts.tv_nsec, &rem.ts);
86
87 if (sigaction(SIGALRM, &act, NULL))
88 return 77;
89 if (sigprocmask(SIG_SETMASK, &set, NULL))
90 return 77;
91
92 if (setitimer(ITIMER_REAL, &itv, NULL))
93 return 77;
94 printf("setitimer(ITIMER_REAL, {it_interval={%jd, %jd}"
95 ", it_value={%jd, %jd}}, NULL) = 0\n",
96 (intmax_t) itv.it_interval.tv_sec,
97 (intmax_t) itv.it_interval.tv_usec,
98 (intmax_t) itv.it_value.tv_sec,
99 (intmax_t) itv.it_value.tv_usec);
100
101 --req.ts.tv_nsec;
102 if (!syscall(__NR_clock_nanosleep, CLOCK_REALTIME, 0, &req.ts, &rem.ts))
103 return 77;
104 printf("clock_nanosleep(CLOCK_REALTIME, 0, {%jd, %jd}, {%jd, %jd})"
105 " = ? ERESTART_RESTARTBLOCK (Interrupted by signal)\n",
106 (intmax_t) req.ts.tv_sec, (intmax_t) req.ts.tv_nsec,
107 (intmax_t) rem.ts.tv_sec, (intmax_t) rem.ts.tv_nsec);
108 puts("--- SIGALRM {si_signo=SIGALRM, si_code=SI_KERNEL} ---");
109
110 if (syscall(__NR_clock_gettime, CLOCK_REALTIME, &req.ts))
111 return 77;
112 printf("clock_gettime(CLOCK_REALTIME, {%jd, %jd}) = 0\n",
113 (intmax_t) req.ts.tv_sec, (intmax_t) req.ts.tv_nsec);
114
115 ++req.ts.tv_sec;
116 rem.ts.tv_sec = 0xc0de4;
117 rem.ts.tv_nsec = 0xc0de5;
118 if (!syscall(__NR_clock_nanosleep, CLOCK_REALTIME, TIMER_ABSTIME,
119 &req.ts, &rem.ts))
120 return 77;
121 printf("clock_nanosleep(CLOCK_REALTIME, TIMER_ABSTIME, {%jd, %jd}, %p)"
122 " = ? ERESTARTNOHAND (To be restarted if no handler)\n",
123 (intmax_t) req.ts.tv_sec, (intmax_t) req.ts.tv_nsec, &rem.ts);
124 puts("--- SIGALRM {si_signo=SIGALRM, si_code=SI_KERNEL} ---");
125
126 puts("+++ exited with 0 +++");
127 return 0;
128 }
129