mirror of https://github.com/aredn/aredn.git
74 lines
2.4 KiB
Bash
Executable File
74 lines
2.4 KiB
Bash
Executable File
#!/bin/sh
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true <<'LICENSE'
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On boot, and every 24 hours, update the clock from the first
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available NTP server we find on the network.
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Part of AREDN® -- Used for creating Amateur Radio Emergency Data Networks
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Copyright (C) 2022 Tim Wilkinson KN6PLV
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See Contributors file for additional contributors
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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 the GNU General Public License as published by
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the Free Software Foundation version 3 of the License.
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This program 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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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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Additional Terms:
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Additional use restrictions exist on the AREDN® trademark and logo.
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See AREDNLicense.txt for more info.
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Attributions to the AREDN® Project must be retained in the source code.
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If importing this code into a new or existing project attribution
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to the AREDN® project must be added to the source code.
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You must not misrepresent the origin of the material contained within.
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Modified versions must be modified to attribute to the original source
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and be marked in reasonable ways as differentiate it from the original
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version.
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LICENSE
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exec 2> /dev/null
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# If real ntp is running, we don't need to do this
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if [ "$(pidof ntpd)" != "" ]; then
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if [ -f /var/state/ntp-stratum ] && [ $(cat /var/state/ntp-stratum) -lt 16 ]; then
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echo -n "ntp" > /tmp/timesync
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exit 0
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fi
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fi
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for candidate in $(uci -q get system.ntp.server)
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do
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if $(ntpd -n -q -p ${candidate}); then
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echo -n "ntp" > /tmp/timesync
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logger -p notice -t update-time "Update clock from ${candidate}"
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exit 0
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fi
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done
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# NTP servers tend to be poorly advertised, so we have to use a bit of
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# heuristics to find them
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for candidate in $(grep -i ntp /var/run/services_olsr | sed "s/^.*:\/\/\(.*\):.*$/\1/")
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do
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if $(ntpd -n -q -p ${candidate}); then
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echo -n "ntp" > /tmp/timesync
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logger -p notice -t update-time "Update clock from ${candidate}"
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exit 0
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fi
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done
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rm -f /tmp/timesync
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logger -p notice -t update-time "Failed to update clock: No reachable ntpd servers."
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exit 1
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