1 /* Test for ntp_gettime. 2 Copyright (C) 2021-2022 Free Software Foundation, Inc. 3 This file is part of the GNU C Library. 4 5 The GNU C Library is free software; you can redistribute it and/or 6 modify it under the terms of the GNU Lesser General Public 7 License as published by the Free Software Foundation; either 8 version 2.1 of the License, or (at your option) any later version. 9 10 The GNU C Library is distributed in the hope that it will be useful, 11 but WITHOUT ANY WARRANTY; without even the implied warranty of 12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 13 Lesser General Public License for more details. 14 15 You should have received a copy of the GNU Lesser General Public 16 License along with the GNU C Library; if not, see 17 <https://www.gnu.org/licenses/>. */ 18 19 #include <time.h> 20 #include <stdlib.h> 21 #include <sys/timex.h> 22 #include <support/check.h> 23 #include <support/xtime.h> 24 25 #ifndef NTP_GETTIME_SYSCALL 26 # define NTP_GETTIME_SYSCALL ntp_gettime 27 #endif 28 29 #define STR(__s) #__s 30 31 static int do_test(void)32do_test (void) 33 { 34 struct timespec tv_before_ntp, tv_after_ntp; 35 struct ntptimeval ntv; 36 37 /* To prevent seconds rollover (which is very unlikely though), 38 loop until we do match seconds values before and after 39 call to ntp_gettime. */ 40 do 41 { 42 tv_before_ntp = xclock_now (CLOCK_REALTIME); 43 44 int ret = NTP_GETTIME_SYSCALL (&ntv); 45 if (ret == -1) 46 FAIL_EXIT1 (STR(NTP_GETTIME_SYSCALL)" failed: %m\n"); 47 48 tv_after_ntp = xclock_now (CLOCK_REALTIME); 49 } 50 while (tv_after_ntp.tv_sec != tv_before_ntp.tv_sec); 51 52 TEST_COMPARE (tv_after_ntp.tv_sec, ntv.time.tv_sec); 53 return 0; 54 } 55 56 #include <support/test-driver.c> 57