ah, I forgot the set the script's file permission.
On 2015-01-26 21:17, Suvir Bhargav wrote:
> 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
>
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