Hi Guys

Just feedback on this particular thread, this issue is SOLVED.

The reason why SYSTEM() and SHELL() was not working for me was that I was passing a linefeed character (\n, hex 0x0a) in one of the channel variables in Asterisk that was then parsed in the call to SYSTEM() and SHELL().

It appears that a big difference between 1.8 (where this code was developed)
and Asterisk 10 / 11 / 12 / 13 et al is that if SYSTEM() or SHELL()
encounters a linefeed in the parsed parameters passed in the string they are called on, they stop parsing and evaluating any other Asterisk variables passed in to the right of the parameter string given to SYSTEM() and SHELL().

I eliminated the spurious \n character from a UUID generation BASH script and SYSTEM() and SHELL() now appear to be working correctly, parsing and evaluating all Asterisk channel variables passed into them as parameters, and then calling the external BASH script 100% correctly with these parameters.

So the issue was “bad data” on my side, and the apparent fact that Asterisk
13.22.0 is sensitive to \n in parameter strings passed to the SHELL()
function and SYSTEM() dialplan application, and stops processing the string if a \n is encountered in a call to SHELL() or SYSTEM().

Hope this helps someone.

Regards

Stefan

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