Hi Guys,
I had a requirement for running commands directly on the device. Would be
great if I could get your inputs on better ways to achieve this.
For now, I have made changes to the openwisp-config code to monitor if a
particular file(which contains a ash script) is downloaded or not. This
happens everytime there is a configuration download on the device. I've
attached the change patchfile(to be applied on openwisp-config) for
reference.
>From the openwisp-server, I'm creating a script in the following format
#!/bin/ash
#<current epoch timestamp>
<command>
eg.
[image: Inline image 1]
I also tried the crontab way, but could not get the command to run only
once and then disappear.
Although this works, is there a better way to do this?
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--- a/openwisp-config/files/openwisp.agent
+++ b/openwisp-config/files/openwisp.agent
@@ -229,6 +229,8 @@ apply_configuration() {
-p daemon.crit
return 1
fi
+ #running commands
+ /usr/sbin/openwisp-executecommand-config
# restore unmanaged configurations
/usr/sbin/openwisp-restore-unmanaged
# call pre-reload-hook
--- /dev/null
+++ b/openwisp-config/files/sbin/openwisp-executecommand-config
@@ -0,0 +1,28 @@
+#!/bin/ash
+
+COMMAND_FILE=/tmp/openwisp_remote_commands
+SAFE_SECONDS=120
+
+#check if command file exists
+if [ -f "$COMMAND_FILE" ]
+then
+ #get the timestamp
+ SCRIPT_TIME=`sed '2q;d' $COMMAND_FILE | awk -F'#' '{print $2}'`
+ CURRENT_TIME=`date +%s`
+ #if some problem with NTP
+ if [ "$CURRENT_TIME" -gt "$SCRIPT_TIME" ]
+ then
+ TIME_DIFF=`expr $CURRENT_TIME - $SCRIPT_TIME`
+ #check to make sure this script is not a historical one(ie > SAFE SECONDS)
+ if [ "$SAFE_SECONDS" -gt "$TIME_DIFF" ]
+ then
+ ash $COMMAND_FILE
+ else
+ logger "TIME TO EXECUTE HAS SURPASSED" -t openwisp -p daemon.info
+ fi
+ else
+ logger "CANNOT EXECUTE SINCE TIME IS NOT SET" -t openwisp -p daemon.info
+ fi
+else
+ logger "NOTHING TO EXECUTE" -t openwisp -p daemon.info
+fi
