103 lines
2.7 KiB
Bash
Executable file
103 lines
2.7 KiB
Bash
Executable file
#!/bin/bash
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#
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# Copyright (C) 2007 Karel Zak <kzak@redhat.com>
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#
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# This file is part of util-linux.
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#
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# This file is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License or
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# (at your option) any later version.
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#
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# This file is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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TS_TOPDIR="${0%/*}/../.."
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TS_DESC="system to hw"
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NTP_SERVER="0.fedora.pool.ntp.org"
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. "$TS_TOPDIR"/functions.sh
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ts_init "$*"
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ts_check_test_command "$TS_CMD_HWCLOCK"
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ts_skip_nonroot
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if [ "$TRAVIS_DIST" == "precise" ]; then
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ts_skip "https://github.com/util-linux/util-linux/issues/1082"
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fi
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if [ "$GITHUB_ACTIONS" == "true" ]; then
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ts_skip "virtual machine"
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fi
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ts_check_prog "bc"
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ts_check_prog "sntp"
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function get_offset_sys_ntp
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{
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local ip="$@"
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local out
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# using hostname instead of IP could give us more than one offset
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out=$(sntp --timeout 1 "$ip") || return 1
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# sed must deliver a signed float or empty string for sure
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out=$(echo "$out" | \
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sed -n 's/.* \(\(+\|-\)[0-9]\{1,\}\.[0-9]\{1,\}\).*/\1/1p')
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[ -n "$out" ] || return 1
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echo "$out"
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}
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function check_diff_offset
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{
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local a=${1#+}
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local b=${2#+}
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local max="$3"
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local tmp
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tmp=$(echo "$a - $b" | bc | tr -d '-')
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echo "$tmp"
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tmp=$(echo "$tmp < $max" | bc)
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[ $tmp -eq 1 ]
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}
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# we need fixed ntp IP to get comparable offsets
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NTP_IP=$(ts_resolve_host "$NTP_SERVER") \
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|| ts_skip "can't resolve hostname $NTP_SERVER"
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OFFSET_A=$(get_offset_sys_ntp "$NTP_IP") \
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|| ts_skip "can't get ntp offset 1st, $NTP_IP"
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OFFSET_B=$(get_offset_sys_ntp "$NTP_IP") \
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|| ts_skip "can't get ntp offset 2nd, $NTP_IP"
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diff=$(check_diff_offset $OFFSET_A $OFFSET_B 0.02) \
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|| ts_skip "unreliable ntp or sys clock offsets: $NTP_IP $OFFSET_A $OFFSET_B +/-$diff"
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# hwclock --show should work if we have a hw clock
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tmp=$($TS_CMD_HWCLOCK --show 2>&1)
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if [ $? != "0" ]; then
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echo "$tmp" | grep -q "Cannot access the Hardware Clock via" \
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&& ts_skip "no hardware clock found"
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ts_failed "hwclock --show"
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fi
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# call hwclock
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for i in `seq 1 10`; do
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# only *skip* on failure for now
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$TS_CMD_HWCLOCK --systohc || ts_skip "hwclock --systohc failed, $i"
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$TS_CMD_HWCLOCK --hctosys || ts_skip "hwclock --hctosys failed, $i"
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done
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OFFSET_C=$(get_offset_sys_ntp "$NTP_IP") \
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|| ts_skip "can't get ntp offset 3rd, $NTP_IP"
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diff=$(check_diff_offset "$OFFSET_B" "$OFFSET_C" 1.0) \
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|| ts_failed "offsets $NTP_IP: $OFFSET_B $OFFSET_C +/-$diff"
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ts_ok "offsets $NTP_IP: $OFFSET_B $OFFSET_C +/-$diff"
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