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 #include <stdio.h> 29 #include <stdint.h> 30 #include <signal.h> 31 #include <time.h> 32 #include <sys/time.h> 33 34 static void 35 handler(int signo) 36 { 37 } 38 39 int 40 main(void) 41 { 42 struct { 43 struct timespec ts; 44 uint32_t pad[2]; 45 } req = { 46 .ts = { .tv_nsec = 0xc0de1 }, 47 .pad = { 0xdeadbeef, 0xbadc0ded } 48 }, rem = { 49 .ts = { .tv_sec = 0xc0de2, .tv_nsec = 0xc0de3 }, 50 .pad = { 0xdeadbeef, 0xbadc0ded } 51 }; 52 const sigset_t set = {}; 53 const struct sigaction act = { .sa_handler = handler }; 54 const struct itimerval itv = { .it_value.tv_usec = 111111 }; 55 56 if (nanosleep(&req.ts, NULL)) 57 return 77; 58 printf("nanosleep({%jd, %jd}, NULL) = 0\n", 59 (intmax_t) req.ts.tv_sec, (intmax_t) req.ts.tv_nsec); 60 61 if (!nanosleep(NULL, &rem.ts)) 62 return 77; 63 printf("nanosleep(NULL, %p) = -1 EFAULT (Bad address)\n", &rem.ts); 64 65 if (nanosleep(&req.ts, &rem.ts)) 66 return 77; 67 printf("nanosleep({%jd, %jd}, %p) = 0\n", 68 (intmax_t) req.ts.tv_sec, (intmax_t) req.ts.tv_nsec, &rem.ts); 69 70 req.ts.tv_nsec = 1000000000; 71 if (!nanosleep(&req.ts, &rem.ts)) 72 return 77; 73 printf("nanosleep({%jd, %jd}, %p) = -1 EINVAL (Invalid argument)\n", 74 (intmax_t) req.ts.tv_sec, (intmax_t) req.ts.tv_nsec, &rem.ts); 75 76 if (sigaction(SIGALRM, &act, NULL)) 77 return 77; 78 if (sigprocmask(SIG_SETMASK, &set, NULL)) 79 return 77; 80 81 if (setitimer(ITIMER_REAL, &itv, NULL)) 82 return 77; 83 printf("setitimer(ITIMER_REAL, {it_interval={%jd, %jd}" 84 ", it_value={%jd, %jd}}, NULL) = 0\n", 85 (intmax_t) itv.it_interval.tv_sec, 86 (intmax_t) itv.it_interval.tv_usec, 87 (intmax_t) itv.it_value.tv_sec, 88 (intmax_t) itv.it_value.tv_usec); 89 90 req.ts.tv_nsec = 999999999; 91 if (!nanosleep(&req.ts, &rem.ts)) 92 return 77; 93 printf("nanosleep({%jd, %jd}, {%jd, %jd})" 94 " = ? ERESTART_RESTARTBLOCK (Interrupted by signal)\n", 95 (intmax_t) req.ts.tv_sec, (intmax_t) req.ts.tv_nsec, 96 (intmax_t) rem.ts.tv_sec, (intmax_t) rem.ts.tv_nsec); 97 puts("--- SIGALRM {si_signo=SIGALRM, si_code=SI_KERNEL} ---"); 98 99 puts("+++ exited with 0 +++"); 100 return 0; 101 } 102
