1 /* Check that clock_gettime does not clobber errno on success. 2 Copyright (C) 2021 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 <errno.h> 20 #include <time.h> 21 #include <support/check.h> 22 #include <stdio.h> 23 24 static void test_clock(clockid_t clk)25test_clock (clockid_t clk) 26 { 27 printf ("info: testing clock: %d\n", (int) clk); 28 29 for (int original_errno = 0; original_errno < 2; ++original_errno) 30 { 31 errno = original_errno; 32 struct timespec ts; 33 if (clock_gettime (clk, &ts) == 0) 34 TEST_COMPARE (errno, original_errno); 35 } 36 } 37 38 static int do_test(void)39do_test (void) 40 { 41 test_clock (CLOCK_BOOTTIME); 42 test_clock (CLOCK_BOOTTIME_ALARM); 43 test_clock (CLOCK_MONOTONIC); 44 test_clock (CLOCK_MONOTONIC_COARSE); 45 test_clock (CLOCK_MONOTONIC_RAW); 46 test_clock (CLOCK_PROCESS_CPUTIME_ID); 47 test_clock (CLOCK_REALTIME); 48 test_clock (CLOCK_REALTIME_ALARM); 49 test_clock (CLOCK_REALTIME_COARSE); 50 #ifdef CLOCK_TAI 51 test_clock (CLOCK_TAI); 52 #endif 53 test_clock (CLOCK_THREAD_CPUTIME_ID); 54 return 0; 55 } 56 57 #include <support/test-driver.c> 58