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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 16:09:41 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 16:09:41 +0000
commit3271d1ac389d2ec93db9c5b9ce0991ce478476cf (patch)
tree35ff7d180e1ccc061f28535d7435b5ba1789e734 /test/kernel/ntpadjtime.c
parentInitial commit. (diff)
downloadchrony-3271d1ac389d2ec93db9c5b9ce0991ce478476cf.tar.xz
chrony-3271d1ac389d2ec93db9c5b9ce0991ce478476cf.zip
Adding upstream version 4.3.upstream/4.3upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r--test/kernel/ntpadjtime.c75
1 files changed, 75 insertions, 0 deletions
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 <errno.h>
+#include <stdio.h>
+#include <string.h>
+#include <sys/time.h>
+#include <sys/timex.h>
+
+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;
+}