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ecc at cmu.edu
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 Posted: Wed Jul 02, 2014 4:25 pm Post subject: [asterisk-users] quoting arguments to System command in dial |
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I'm trying to invoke a program to send a received
fax. I'd like to *safely* pass the value of ${CALLERID(all)} as an
argument to the program, executed by System(...). The problem is that
the callerid can have quotes or other dangerous characters as far as
the shell is concerned.
For example, the test-fax service that I'm using sets the callerid to
"UNAVAILABLE " <888NNNNNNN>
(I forget the actual N digits, that's unimportant). What's important
is the quotation marks.
I haven't been able to figure out a way using the QUOTE function to
accomplish what I want. I either get too few or too many quotes, both
resulting in multiple arguments being passed to my program instead of one.
I can paste some logging output if that would help.
Any suggestions would be appreciated.
--
Eric Cooper e c c @ c m u . e d u
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johnkiniston at gmail.com
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| Posted: Wed Jul 02, 2014 7:01 pm Post subject: [asterisk-users] quoting arguments to System command in dial |
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How about using the FILTER function to strip out anything you don't like from the CALLERID variables?
Set(CIDNAME=${FILTER(A-Z,${CALLERID(NAME)})})
Set(CIDNUM=${FILTER(0-9,${CALLERID(NUM)})})
On Wed, Jul 2, 2014 at 2:25 PM, Eric Cooper <ecc@cmu.edu (ecc@cmu.edu)> wrote:
| Quote: | I'm trying to invoke a program to send a received
fax. I'd like to *safely* pass the value of ${CALLERID(all)} as an
argument to the program, executed by System(...). The problem is that
the callerid can have quotes or other dangerous characters as far as
the shell is concerned.
For example, the test-fax service that I'm using sets the callerid to
"UNAVAILABLE " <888NNNNNNN>
(I forget the actual N digits, that's unimportant). What's important
is the quotation marks.
I haven't been able to figure out a way using the QUOTE function to
accomplish what I want. I either get too few or too many quotes, both
resulting in multiple arguments being passed to my program instead of one.
I can paste some logging output if that would help.
Any suggestions would be appreciated.
--
Eric Cooper e c c @ c m u . e d u
--
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New to Asterisk? Join us for a live introductory webinar every Thurs:
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A human being should be able to change a diaper, plan an invasion, butcher a hog, conn a ship, design a building, write a sonnet, balance accounts, build a wall, set a bone, comfort the dying, take orders, give orders, cooperate, act alone, solve equations, analyze a new problem, pitch manure, program a computer, cook a tasty meal, fight efficiently, die gallantly. Specialization is for insects.
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ecc at cmu.edu
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| Posted: Fri Jul 04, 2014 12:30 pm Post subject: [asterisk-users] quoting arguments to System command in dial |
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On Wed, Jul 02, 2014 at 05:00:47PM -0700, John Kiniston wrote:
| Quote: | How about using the FILTER function to strip out anything you don't like from
the CALLERID variables?
Set(CIDNAME=${FILTER(A-Z,${CALLERID(NAME)})})
Set(CIDNUM=${FILTER(0-9,${CALLERID(NUM)})})
|
Thanks for the suggestion; I'll try it. I'm still bothered that I
can't figure out how to reliably quote the characters rather than just
stripping them out.
--
Eric Cooper e c c @ c m u . e d u
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jnovack at stromberg-c...
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| Posted: Fri Jul 04, 2014 1:21 pm Post subject: [asterisk-users] quoting arguments to System command in dial |
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Eric Cooper wrote:
| Quote: | On Wed, Jul 02, 2014 at 05:00:47PM -0700, John Kiniston wrote:
| Quote: | How about using the FILTER function to strip out anything you don't like from
the CALLERID variables?
Set(CIDNAME=${FILTER(A-Z,${CALLERID(NAME)})})
Set(CIDNUM=${FILTER(0-9,${CALLERID(NUM)})})
|
Thanks for the suggestion; I'll try it. I'm still bothered that I
can't figure out how to reliably quote the characters rather than just
stripping them out.
|
I have found that this varies from version to version
The parser in 1.4 is quite different than in 1.8 or 11
I ran into this with MSQL commands within the dialplan
Escapes (\) single and double quotes are not uniform from 1.4 through 11.
YMMV
John Novack
--
Dog is my Co-pilot
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