Custom Notificaiton with Signal Messenger does not work with sink

Hi,

I have been using custom notification with telegram following this guide: [GUIDE] Use Telegram as notification service. This works very good also with OMV5.

However, I am thinking to switch to Signal Messenger. I thought I could use a similar approach. I have duplicated the Telegram OMV sink.d file and inserted this code for signal:

#!/bin/bash

sender="+49xxxxxx"
recipiant="+49yyyyyyy"

echo -e "${OMV_NOTIFICATION_SUBJECT} on the ${OMV_NOTIFICATION_DATE} \n\n $(cat ${OMV_NOTIFICATION_MESSAGE_FILE})" |signal-cli -u $sender send $recipiant

However, this script seems not to be triggered.

I tested already manual message sending with signal which works very well. Also using this commands it works without any issues:

export OMV_NOTIFICATION_SUBJECT=test
export OMV_NOTIFICATION_DATE=testdate
export OMV_NOTIFICATION_MESSAGE_FILE=/tmp/testfile 

/usr/share/openmediavault/notification/sink.d/./20signal

Any idea why it does not work automatically with custom notification and sink scripts?

Yes the script can be executed. Permission for this file is 755.

I am now using another approach. I am using signal-cli-rest-api to wrap a REST API around the signal-cli commands. This seems to work.