[asterisk-bugs] [Asterisk 0016905]: system() dialplan function does not work

[Asterisk Bug Tracker]

The following issue has been UPDATED. 
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https://issues.asterisk.org/view.php?id=16905 
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Reported By:                ip-rob
Assigned To:                
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Project:                    Asterisk
Issue ID:                   16905
Category:                   Applications/app_system
Reproducibility:            always
Severity:                   major
Priority:                   normal
Status:                     new
Asterisk Version:           1.6.2.4 
JIRA:                        
Regression:                 No 
Reviewboard Link:            
SVN Branch (only for SVN checkouts, not tarball releases): N/A 
SVN Revision (number only!):  
Request Review:              
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Date Submitted:             2010-02-25 14:51 CST
Last Modified:              2010-03-01 18:43 CST
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Summary:                    system() dialplan function does not work
Description: 
You can put any script passed as an argument to the system() command in a
dialplan and it will not execute.  In my example, I created the following
script:

#!/bin/bash
ls -l /tmp > /usr/src/temp.txt

in file /usr/src/temp.sh.  temp.sh is 755 so any user can execute it.  In
the dialplan I put a simple call to system using this dialplan

exten => 101,1,Set(__FROM_DID=${EXTEN})
exten => 101,n,system(/usr/src/temp.sh)

The asterisk log shows

[Feb 25 15:12:11] VERBOSE[23375] pbx.c:     -- Executing
[101 at from-trunk:1] ^[[1;36mSet^[[0m("^[[1;35mSIP/DefaultOut-00000006^[[0m",
"^[[1;35m__FROM_DID=[Feb 25 15:12:11] VERBOSE[23375] pbx.c:     --
Executing [101 at from-trunk:2]
^[[1;36mSystem^[[0m("^[[1;35mSIP/DefaultOut-00000006^[[0m",
"^[[1;35m/usr/src/temp.sh^[[0m") in new stack

The script does not execute as there is no output file /usr/src/temp.txt.

Executing the command from the asterisk command line as
"!/usr/src/temp.sh" DOES work without issue.

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---------------------------------------------------------------------- 
 (0118728) ip-rob (reporter) - 2010-03-01 18:43
 https://issues.asterisk.org/view.php?id=16905#c118728 
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Additional testing has shown the following:

- ExecIf does not always have an issue.  Running my previous temp.sh
scripts work ok.

- The dialplan below will not work.  The problem is clearly with the
ExecIf since the exact same command will work with a direct System function
call.  But when ExecIf is added, it does not work.

- The condition has been verified to be true.

[ext-fax]
include => ext-fax-custom
exten => s,1,Macro(user-callerid,)
exten => s,n,Noop(Receiving Fax for: ${FAX_RX_EMAIL} , From:
${CALLERID(all)})
exten => s,n(receivefax),ReceiveFAX(${ASTSPOOLDIR}/fax/${UNIQUEID}.tif)
exten => h,1,GotoIf($["${FAXSTATUS:0:6}" = "FAILED"]?failed)
exten => h,n(process),ExecIf($["${FAX_RX_EMAIL}" !=
""]?system(${ASTVARLIBDIR}/bin/fax-process.pl --to ${FAX_RX_EMAIL} --from
"myfax at freepbx.org" --dest "${FROM_DID}" --subject "New fax from
${URIENCODE(${CALLERID(name)})} ${URIENCODE(<${CALLERID(number)}>)}"
--attachment fax_${URIENCODE(${CALLERID(number)})}.pdf --type
application/pdf --file ${ASTSPOOLDIR}/fax/${UNIQUEID}.tif))
exten => h,n(end),Macro(hangupcall,)
exten => h,process+101(failed),Noop(FAX ${FAXSTATUS} for: ${FAX_RX_EMAIL}
, From: ${CALLERID(all)})
exten => h,n,Macro(hangupcall,)

FreePBX has worked around the problem by changing from ExecIf to GotoIf. 
Several FreePBX users have the same issue on 1.6.2. 

See
http://www.freepbx.org/forum/freepbx/users/fax-process-pl-not-executing-under-1-6-2-2#comment-24434

and

http://www.freepbx.org/trac/ticket/4096 

Issue History 
Date Modified    Username       Field                    Change               
====================================================================== 
2010-03-01 18:43 ip-rob         Note Added: 0118728                          
2010-03-01 18:43 ip-rob         Status                   closed => new       
2010-03-01 18:43 ip-rob         Resolution               unable to reproduce =>
reopened
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