asterisk users - Sep 2005 - Voicemail() application returning -1 on a hangup

Hi,

   I am trying to insert a system() call right after the call to Voicemail() in
order to notify people that they have received new voicemail.  (In case you are
interested, I was following the tips here, but I have had to change a few
things:
http://www.voip-info.org/wiki-Asterisk+tips+callback ).

   My setup works when someone leaving a message hits # to exit the voicemail
after speaking, or lets it time out.  However, when they just hangup (which is
what 99 percent of people do) Voicemail() returns -1, which apparently stops
any further extensions from executing.

   Here is my vm macro:

[macro-vm]
exten => s,1,NoOp(At start of macro-vm---Arg1=${ARG1}  Arg2=${ARG2})
exten => s,2,Goto(s-${ARG2},1)
exten => s-BUSY,1,Voicemail(b${ARG1})   ; Voicemail Busy message
exten => s-BUSY,2,Hangup()
exten => _s-.,1,NoOp(Before Voicemail-u---Arg1=${ARG1}  Arg2=${ARG2})
exten => _s-.,2,Voicemail(u${ARG1})     ; Voicemail Unavailable message
exten => _s-.,3,NoOp(After Voicemail-u---Arg1=${ARG1}  Arg2=${ARG2})
exten => _s-.,4,system(${SCRIPTS_DIR}/voicemail_callback.sh ${ARG1})
exten => _s-.,5,NoOp(After system----Arg1=${ARG1}  Arg2=${ARG2})
exten => _s-.,6,Hangup()

; this catches the error exit (n+101) from Voicemail, such was when a person
hangs up after recording a message
; instead of hitting #  (this doesn't work)
; exten => _s-.,103,system(${SCRIPTS_DIR}/voicemail_callback.sh ${ARG1})

exten => o,1,Background(one-moment-please)      ; 0 during vm message will
hangup
exten => o,2,GotoIf($["foo${FROM_DID}"
"foo"]?from-pstn,s,1:from-pstn,${FROM_DID},1)
          
exten => h,1,system(${SCRIPTS_DIR}/voicemail_callback.sh ${ARG1})
exten => t,1,system(${SCRIPTS_DIR}/voicemail_callback.sh ${ARG1})

exten => a,2,VoiceMailMain(${ARG1})
exten => a,3,Hangup 

    The NoOp after the Voicemail call never runs if you hang up, thus the
system() never has a chance to run.  The t,1 seems to work for when you time
out.  The h,1 which I thought might catch it when a person hangs up in
Voicemail(), doesn't.

    The behavior of Voicemail() should allow you to differentiate between a real
error (out of disk space for voicemail, for example) and the most common
behaviour of message leavers (hanging up when done).  Perhaps that should be a
bug report.  But how can I work around this ?

    Would it be easy to patch the C code of app_voicemail.c to not have this
behavior ?  I looked over it but I could not make headway on the first look.

--Rob

-- 
Robert G. Ristroph
Airlink Systems
rristroph@airlinksystems.com
(512) 231-1240 x103





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