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aredn/files/usr/local/bin/olsrd-watchdog

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bugfix: olsrd-watchdog false triggers a reboot. Using the method suggested by Henning Rogge in 2014 {{{ 1) remove file 2) wait 2 intervals 3) if file exists, go to 1) 4) restart olsr, then go to 1) }}} With the exception that we currently wait more than 2 intervals. Even if the script hits a collision at the same time the file is being written the file will already exist from one of the previous writes or the current write. Removing a file in use is safe as once the FD closes the file contents are fully released. Additional Advantages: * Should be more efficient to check if file exists instead of reading the file and comparing date stamps. * Removing the Perl code moves us one step closer to retiring Perl in the future.
2015-01-15 17:35:55 -07:00
#!/bin/sh
bugfix: Add GPLv3 license text to core BBHN Mesh files Program went GPLv3 last year but license text was never added to files Default text to give credit to David as he is listed in all commits and to reference the BBHN Austin team at the same time as they were part of the group of HAM's that started this project.
2015-01-18 12:36:49 -07:00
<<'LICENSE'
Part of BBHN Mesh -- Used for creating Amateur Radio friendly mesh networks
Copyright (C) 2015 Conrad Lara
See Contributors file for additional contributors
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation version 3 of the License.
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, see <http://www.gnu.org/licenses/>.
LICENSE
import of files/ from BBHN 1.0.0 (bbhn svn 273)
2013-11-14 23:11:16 -07:00
bugfix: olsrd-watchdog false triggers a reboot. Using the method suggested by Henning Rogge in 2014 {{{ 1) remove file 2) wait 2 intervals 3) if file exists, go to 1) 4) restart olsr, then go to 1) }}} With the exception that we currently wait more than 2 intervals. Even if the script hits a collision at the same time the file is being written the file will already exist from one of the previous writes or the current write. Removing a file in use is safe as once the FD closes the file contents are fully released. Additional Advantages: * Should be more efficient to check if file exists instead of reading the file and comparing date stamps. * Removing the Perl code moves us one step closer to retiring Perl in the future.
2015-01-15 17:35:55 -07:00
# wait for the watchdog file to appear before starting
while [ ! -f "/tmp/olsrd.watchdog" ]
do
sleep 15
done
bugfix: rework olsrd-watchdog to avoid race condition The olsrd watchdog module truncates and writes the latest timestamp every 5 seconds. The olsrd-watchdog script could catch the file during write causing an instant restart. Changed to want 3 failures before restarting olsrd reducing the chance of collision based restarts. fixes BBHN->ticket:68
2014-11-03 20:59:34 -07:00
import of files/ from BBHN 1.0.0 (bbhn svn 273)
2013-11-14 23:11:16 -07:00
bugfix: olsrd-watchdog false triggers a reboot. Using the method suggested by Henning Rogge in 2014 {{{ 1) remove file 2) wait 2 intervals 3) if file exists, go to 1) 4) restart olsr, then go to 1) }}} With the exception that we currently wait more than 2 intervals. Even if the script hits a collision at the same time the file is being written the file will already exist from one of the previous writes or the current write. Removing a file in use is safe as once the FD closes the file contents are fully released. Additional Advantages: * Should be more efficient to check if file exists instead of reading the file and comparing date stamps. * Removing the Perl code moves us one step closer to retiring Perl in the future.
2015-01-15 17:35:55 -07:00
while true
do
import of files/ from BBHN 1.0.0 (bbhn svn 273)
2013-11-14 23:11:16 -07:00
bugfix: olsrd-watchdog false triggers a reboot. Using the method suggested by Henning Rogge in 2014 {{{ 1) remove file 2) wait 2 intervals 3) if file exists, go to 1) 4) restart olsr, then go to 1) }}} With the exception that we currently wait more than 2 intervals. Even if the script hits a collision at the same time the file is being written the file will already exist from one of the previous writes or the current write. Removing a file in use is safe as once the FD closes the file contents are fully released. Additional Advantages: * Should be more efficient to check if file exists instead of reading the file and comparing date stamps. * Removing the Perl code moves us one step closer to retiring Perl in the future.
2015-01-15 17:35:55 -07:00
if [ -f "/tmp/olsrd.watchdog" ]
then
rm -f "/tmp/olsrd.watchdog"
else
uptime=`cat /proc/uptime | cut -d' ' -f1`
date=`date`
echo "$uptime $date" >> /tmp/olsrd.log
/etc/init.d/olsrd restart
fi
import of files/ from BBHN 1.0.0 (bbhn svn 273)
2013-11-14 23:11:16 -07:00
bugfix: olsrd-watchdog false triggers a reboot. Using the method suggested by Henning Rogge in 2014 {{{ 1) remove file 2) wait 2 intervals 3) if file exists, go to 1) 4) restart olsr, then go to 1) }}} With the exception that we currently wait more than 2 intervals. Even if the script hits a collision at the same time the file is being written the file will already exist from one of the previous writes or the current write. Removing a file in use is safe as once the FD closes the file contents are fully released. Additional Advantages: * Should be more efficient to check if file exists instead of reading the file and comparing date stamps. * Removing the Perl code moves us one step closer to retiring Perl in the future.
2015-01-15 17:35:55 -07:00
# With interval of 5 seconds this gives ~3 chances
# for a file write before next loop.
sleep 15
done
bugfix: rework olsrd-watchdog to avoid race condition The olsrd watchdog module truncates and writes the latest timestamp every 5 seconds. The olsrd-watchdog script could catch the file during write causing an instant restart. Changed to want 3 failures before restarting olsrd reducing the chance of collision based restarts. fixes BBHN->ticket:68
2014-11-03 20:59:34 -07:00