1 /* 2 * Copyright (c) 2015 Dmitry V. Levin <ldv (at) 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 41 handler(int signo) 42 { 43 } 44 45 int 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
