From b2d2d555a704148968cb7e566735a2a1b1a2f189 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Tue, 9 Apr 2024 14:48:01 +0200 Subject: Adding upstream version 4.5. Signed-off-by: Daniel Baumann --- test/kernel/ntpadjtime.c | 75 ++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 75 insertions(+) create mode 100644 test/kernel/ntpadjtime.c (limited to 'test/kernel/ntpadjtime.c') diff --git a/test/kernel/ntpadjtime.c b/test/kernel/ntpadjtime.c new file mode 100644 index 0000000..4af96b4 --- /dev/null +++ b/test/kernel/ntpadjtime.c @@ -0,0 +1,75 @@ +/* + * Copyright (C) Miroslav Lichvar 2015 + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of version 2 of the GNU General Public License as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. + */ + +/* Check the frequency range of the system ntp_adjtime() implementation */ + +#include +#include +#include +#include +#include + +static int +try_ntpadjtime(struct timex *t) +{ + int r; + r = ntp_adjtime(t); + if (r < 0) + printf("ntp_adjtime() failed : %s ", strerror(errno)); + return r; +} + +static void +reset_ntpadjtime(void) +{ + struct timex t; + + t.modes = MOD_OFFSET | MOD_FREQUENCY; + t.offset = 0; + t.freq = 0; + try_ntpadjtime(&t); +} + +static void +test_freqrange(void) +{ + struct timex t; + int i; + + printf("freq range:\n"); + + for (i = -1000; i <= 1000; i += 50) { + t.modes = MOD_FREQUENCY; + t.freq = i * (1 << 16); + printf("%4d ppm => ", i); + if (try_ntpadjtime(&t) < 0) + continue; + + printf("%4ld ppm : ", t.freq / (1 << 16)); + printf("%s\n", t.freq == i * (1 << 16) ? "ok" : "fail"); + } +} + +int +main() +{ + test_freqrange(); + + reset_ntpadjtime(); + + return 0; +} -- cgit v1.2.3