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 <time.h> 31 #include <unistd.h> 32 #include <sys/syscall.h> 33 34 #if defined __NR_clock_getres \ 35 && defined __NR_clock_gettime \ 36 && defined __NR_clock_settime 37 38 int 39 main(void) 40 { 41 struct { 42 struct timespec ts; 43 uint32_t pad[2]; 44 } t = { 45 .pad = { 0xdeadbeef, 0xbadc0ded } 46 }; 47 48 if (syscall(__NR_clock_getres, CLOCK_REALTIME, &t.ts)) 49 return 77; 50 printf("clock_getres(CLOCK_REALTIME, {%jd, %jd}) = 0\n", 51 (intmax_t) t.ts.tv_sec, 52 (intmax_t) t.ts.tv_nsec); 53 54 if (syscall(__NR_clock_gettime, CLOCK_PROCESS_CPUTIME_ID, &t.ts)) 55 return 77; 56 printf("clock_gettime(CLOCK_PROCESS_CPUTIME_ID, {%jd, %jd}) = 0\n", 57 (intmax_t) t.ts.tv_sec, 58 (intmax_t) t.ts.tv_nsec); 59 60 t.ts.tv_sec = 0xdeface1; 61 t.ts.tv_nsec = 0xdeface2; 62 if (!syscall(__NR_clock_settime, CLOCK_THREAD_CPUTIME_ID, &t.ts)) 63 return 77; 64 printf("clock_settime(CLOCK_THREAD_CPUTIME_ID, {%jd, %jd})" 65 " = -1 EINVAL (Invalid argument)\n", 66 (intmax_t) t.ts.tv_sec, 67 (intmax_t) t.ts.tv_nsec); 68 69 puts("+++ exited with 0 +++"); 70 return 0; 71 } 72 73 #else 74 75 int 76 main(void) 77 { 78 return 77; 79 } 80 81 #endif 82
