Hi,
I have a update job for updating the system (let's say it engine for now). Now
i need to invoke it during wifi up only. On other states, update job must be in
stop state.
The problem is my system is pretty old and i don't have access to nice
upstart-file-bridge. Hence i'm calling a script from the job to chehck for
status and controlling the update job from the script itself.
For the whole sc, i have two jobs and one script. as:
The engine job .conf file:
------------------------------------------------------------------------------
# engine update
#
# Takes care of updating of the system.
description "engine update"
# removing start, it will be started by wifi-job
#start on file FILE_PATH=/var/run/engine/wifiState and started engine
stop on stopped engine or rw_mode
respawn# sinnce its a network job, hence keeping it respawn
respawn limit 10 5
------------------------------------------------------------------------------
Chechk wifi_status job
------------------------------------------------------------------------------
start on started engine
stop on stopped engine or rw_mode
respawn
respawn limit 10 5
script
sleep 10;
/etc/engine/wifi_update.sh
end script
------------------------------------------------------------------------------
And, finally the wifi_update.sh script which basically chehcks for the status
and calls engine update job.
------------------------------------------------------------------------------------------------------------------------------------------------------------
#!/bin/bash
# we check for wifistate and stop/start service based on it.
WIFI_FILE='/var/run/engine/wifiState' #chehck the status here
function update_onwifi () {
if grep -q "^up" /var/run/engine/wifiState && \
initctl status engine | grep -q "start/running"
then
start engine-update
elif grep -q "^down" /var/run/engine/wifiState; then
stop engine-update
fi
}
#check if inotify-tools is installed
type -P inotifywait &>/dev/null || { echo "inotifywait command not found."; }
# it takes some time for wifi status to appear. so we read the directory for
changes.
while inotifywait --format '%f' -e modify,attrib,close_write,move,create,delete
/var/run/engine/ ; do
# it takes some time after boot for the file to appear, hence check.
if [ -f "$WIFI_FILE" ]; then
# we basically chehck everytime someone touch the directory
var/run/engine.
update_onwifi
else
echo "$WIFI_FILE not found."
fi
done
------------------------------------------------------------------------------------------------------------------------------------------------------------
Upon boot, my wifi status job keeps respwaning as it says it has been
terminated. I tested the script independently and it works fine.
May be my appraoch to handle inotify case isn't the right one. Would be happy
if someone has any suggestion
/Suvir
________________________________
NOTE FROM MOBITEC: This e-mail message stream in its entirety, including any
attachments, is confidential and proprietary and intended only for the person
or persons originally addressed, or originally intended to be addressed.
Further, it may be protected by certain agreements, legal privilege, legal
precedent or law. It must not be read by or disclosed to any person other than
the intended recipient without the express permission of the sender. Any
confidential or proprietary interests are not waived or lost by reason of
delivery to you. If this e-mail message is received by anyone other than the
designated recipient, please delete it, including all attachments, and notify
the sender immediately by return e-mail.
--
upstart-devel mailing list
upstart-devel@lists.ubuntu.com
Modify settings or unsubscribe at:
https://lists.ubuntu.com/mailman/listinfo/upstart-devel
