[asterisk-users] quoting arguments to System command in dialplan

John Kiniston johnkiniston at gmail.com
Wed Jul 2 19:00:47 CDT 2014

How about using the FILTER function to strip out anything you don't like
from the CALLERID variables?


On Wed, Jul 2, 2014 at 2:25 PM, Eric Cooper <ecc at cmu.edu> wrote:

> I'm trying to invoke a program to send a received
> fax.  I'd like to *safely* pass the value of ${CALLERID(all)} as an
> argument to the program, executed by System(...).  The problem is that
> the callerid can have quotes or other dangerous characters as far as
> the shell is concerned.
> For example, the test-fax service that I'm using sets the callerid to
> (I forget the actual N digits, that's unimportant).  What's important
> is the quotation marks.
> I haven't been able to figure out a way using the QUOTE function to
> accomplish what I want.  I either get too few or too many quotes, both
> resulting in multiple arguments being passed to my program instead of one.
> I can paste some logging output if that would help.
> Any suggestions would be appreciated.
> --
> Eric Cooper             e c c @ c m u . e d u
> --
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