5190539ce1
Include a test program to determine how the adjtime() implementation behaves. Check the range of supported offset, support for readonly operation, and slew rate with different update intervals and offsets. Also, add a test for ntp_adjtime() to check what frequency range it supports.
75 lines
1.6 KiB
C
75 lines
1.6 KiB
C
/*
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* Copyright (C) Miroslav Lichvar 2015
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of version 2 of the GNU General Public License as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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/* Check the frequency range of the system ntp_adjtime() implementation */
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#include <errno.h>
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#include <stdio.h>
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#include <string.h>
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#include <sys/time.h>
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#include <sys/timex.h>
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static int
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try_ntpadjtime(struct timex *t)
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{
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int r;
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r = ntp_adjtime(t);
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if (r < 0)
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printf("ntp_adjtime() failed : %s ", strerror(errno));
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return r;
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}
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static void
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reset_ntpadjtime(void)
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{
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struct timex t;
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t.modes = MOD_OFFSET | MOD_FREQUENCY;
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t.offset = 0;
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t.freq = 0;
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try_ntpadjtime(&t);
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}
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static void
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test_freqrange(void)
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{
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struct timex t;
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int i;
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printf("freq range:\n");
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for (i = 0; i <= 1000; i += 50) {
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t.modes = MOD_FREQUENCY;
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t.freq = i << 16;
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printf("%4d ppm => ", i);
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if (try_ntpadjtime(&t) < 0)
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continue;
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printf("%4ld ppm : ", t.freq / (1 << 16));
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printf("%s\n", t.freq == i << 16 ? "ok" : "fail");
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}
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}
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int
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main()
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{
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test_freqrange();
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reset_ntpadjtime();
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return 0;
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}
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