Notification (misc) command, send string to serial port

[gust102]

We have a device, who can be triggered via serial communication, to call or send text message in GSM mobile network.
To trigger this, I just send string 'ALARM$' to serial port:

Code: Select all

/bin/echo 'ALARM$' > /dev/ttyS1

If I do this from the Linux promt (logged in as user nagios), it works fine.

But, if I add this as a notification (misc) commad, the notification triggers, but nothing happens.

Does anyone know what could be the problem here?

[jdalrymple]

Can we see your command definition?

My initial thought is the literal $ character. This is a special character to Nagios, you may need to escape it with a backslash '\'.

[gust102]

This is my latest try:

Code: Select all

define command{
        command_name                    notify-roc-1
        command_line                     /usr/bin/printf "%b" "ALARM$" | tee /dev/ttyS1
}

I will try escape the dollar sign (but it woks from the Linux command prompt).

[gust102]

I managed to solve it by embedding it in a script, with the string ALARM as a parameter.

Script:

Code: Select all

#!/bin/bash

/usr/bin/printf "%b" "$1"$ | tee /dev/ttyS1

Definition:

Code: Select all

define command{
        command_name                    notify-roc-1
        command_line                    /usr/lib/nagios/plugins/notify_roc_1.sh ALARM
}

Thanks for all suggestions!

[cmerchant]

We'll go ahead and close the thread. Thanks.