I have a need to frequently run an applescript on my web server. As the server is running rails, and I need access to my models before and after running the script, I thought that a daemon (via the daemons gem) might be appropriate.
In theory this is fairly easy. Below is a simplified example.
#!/usr/bin/env ruby
ENV["RAILS_ENV"] ||= "development"
require File.dirname(__FILE__) + "/../../config/application"
Rails.application.require_environment!
$running = true
Signal.trap("TERM") do
$running = false
end
while($running) do
Rails.logger.info "Daemon running at #{Time.now}.\n"
# sanity check
%x{touch /foo.txt}
# this stops working after a while
result = %x{/usr/bin/osascript -s o /path/to/the/script.scpt}
# under normal operation, my applescript spits out a string result
Rails.logger.info "Result: #{result}.\n"
sleep 30
end
For testing purposes I've replaced the (somewhat long and time consuming) production applescript with a one-liner. Here it is, in all its glory:
"It Worked!"
Because applescript treats the last line of the script as a return statement, this string gets passed into my result variable and ultimately logged in rails.
This works great - for a while. Eventually though (typically after several hours) the osascript line stops returning results. The daemon is still running but the osascript line, for all I can tell, is completely failing without explanation.
I can say with certainty that the daemon itself has not died because
I thought I'd post an update to this in case anyone out there is having a similar problem. First off, I've found a workaround. Its an ugly hack for sure, but it gets the job done and it doesn't crash every 2 hours. What I'm doing is establishing an ssh connection every time the job is run, which effectively lets the script run on a clean session.
Net::SSH.start('127.0.0.1', 'username', :password => 'password') do |ssh|
result = ssh.exec!('/usr/bin/osascript -s o /path/to/the/script.scpt')
end
And secondly, I've found a large number of crash reports in my ~/Library/Logs/DiagnosticReports directory. More and more I'm starting to believe that this whole ordeal has to do with some kind of session timeout or expiration.
Process: osascript [24884]
Path: /usr/bin/osascript
Identifier: osascript
Version: ??? (???)
Code Type: X86-64 (Native)
Parent Process: ruby [24868]
Date/Time: 2011-02-03 16:40:28.526 -0500
OS Version: Mac OS X 10.6.6 (10J567)
Report Version: 6
Exception Type: EXC_CRASH (SIGABRT)
Exception Codes: 0x0000000000000000, 0x0000000000000000
Crashed Thread: 0 Dispatch queue: com.apple.main-thread
Application Specific Information:
abort() called
LaunchServices: GetOurLSSessionIDInit() returned err #1, securitySessionID == 0x0, vers=10600000 uid=501 euid=501web1.local] [Se
/Users/greg/Applescript/fbbuildutil.scpt
Thread 0 Crashed: Dispatch queue: com.apple.main-thread
0 libSystem.B.dylib 0x00007fff86fd6616 __kill + 10
1 libSystem.B.dylib 0x00007fff87076cca abort + 83
2 com.apple.LaunchServices 0x00007fff82faec84 GetOurLSSessionIDInit() + 298
3 libSystem.B.dylib 0x00007fff86fa08da pthread_once + 95
4 com.apple.LaunchServices 0x00007fff82faf29b SetupCoreApplicationServicesCommunicationPort() + 1343
5 com.apple.LaunchServices 0x00007fff82faf68d getProcessDispatchTable() + 19
6 com.apple.LaunchServices 0x00007fff82fb17a5 LSClientSideSharedMemory::GetClientSideSharedMemory(LSSessionID, bool) + 187
7 com.apple.LaunchServices 0x00007fff82fb1e87 _LSCopyApplicationInformationItem + 43
8 com.apple.AE 0x00007fff8722b735 aeGetThisProcess() + 49
9 com.apple.AE 0x00007fff8722b6df AEEventImpl::initializeData() + 89
10 com.apple.AE 0x00007fff8722b5c4 AEEventImpl::AEEventImpl(unsigned int, unsigned int, AEDesc const*, short, int) + 76
11 com.apple.AE 0x00007fff8722f33e AECreateAppleEvent + 88
12 osascript 0x0000000100001a42 0x100000000 + 6722
13 osascript 0x0000000100000fa0 0x100000000 + 4000
Thread 1: Dispatch queue: com.apple.libdispatch-manager
0 libSystem.B.dylib 0x00007fff86fa116a kevent + 10
1 libSystem.B.dylib 0x00007fff86fa303d _dispatch_mgr_invoke + 154
2 libSystem.B.dylib 0x00007fff86fa2d14 _dispatch_queue_invoke + 185
3 libSystem.B.dylib 0x00007fff86fa283e _dispatch_worker_thread2 + 252
4 libSystem.B.dylib 0x00007fff86fa2168 _pthread_wqthread + 353
5 libSystem.B.dylib 0x00007fff86fa2005 start_wqthread + 13
Thread 2:
0 libSystem.B.dylib 0x00007fff86fa1f8a __workq_kernreturn + 10
1 libSystem.B.dylib 0x00007fff86fa239c _pthread_wqthread + 917
2 libSystem.B.dylib 0x00007fff86fa2005 start_wqthread + 13
Thread 0 crashed with X86 Thread State (64-bit):
rax: 0x0000000000000000 rbx: 0x00000000000001f5 rcx: 0x00007fff5fbfb378 rdx: 0x0000000000000000
rdi: 0x0000000000006134 rsi: 0x0000000000000006 rbp: 0x00007fff5fbfb390 rsp: 0x00007fff5fbfb378
r8: 0x000000010011d740 r9: 0x00000001001fc0a4 r10: 0x00007fff86fd2656 r11: 0x0000000000000202
r12: 0x00007fff5fbfb3c0 r13: 0x00007fff703ce328 r14: 0x00007fff82faeb5a r15: 0x00007fff70c465c0
rip: 0x00007fff86fd6616 rfl: 0x0000000000000202 cr2: 0x00000001000f8000
Binary Images:
0x100000000 - 0x100002ff7 +osascript ??? (???) <1B4A05C4-8772-DCFD-444F-31FEE356E299> /usr/bin/osascript
0x1000f1000 - 0x1000f1fff com.apple.applescript.component 2.1.2 (2.1.2) <C621AB4A-9C10-7F1D-6B4E-0B15373D5C59> /System/Library/Components/AppleScript.component/Contents/MacOS/AppleScript
0x100419000 - 0x1004adfe7 com.apple.applescript 2.1.2 (2.1.2) <E9C125A4-8743-6BF8-5A05-BE85778D4158> /System/Library/PrivateFrameworks/AppleScript.framework/Versions/A/AppleScript
0x7fff5fc00000 - 0x7fff5fc3bdef dyld 132.1 (???) <486E6C61-1197-CC7C-2197-82CE505102D7> /usr/lib/dyld
0x7fff8011d000 - 0x7fff8011efff liblangid.dylib ??? (???) <EA4D1607-2BD5-2EE2-2A3B-632EEE5A444D> /usr/lib/liblangid.dylib
0x7fff8016d000 - 0x7fff8046bfe7 com.apple.HIToolbox 1.6.4 (???) <263AD497-F4CC-9610-E7D3-B95CF6F02030> /System/Library/Frameworks/Carbon.framework/Versions/A/Frameworks/HIToolbox.framework/Versions/A/HIToolbox
0x7fff80472000 - 0x7fff804befff libauto.dylib ??? (???) <F7221B46-DC4F-3153-CE61-7F52C8C293CF> /usr/lib/libauto.dylib
0x7fff804bf000 - 0x7fff80574fe7 com.apple.ink.framework 1.3.3 (107) <8C36373C-5473-3A6A-4972-BC29D504250F> /System/Library/Frameworks/Carbon.framework/Versions/A/Frameworks/Ink.framework/Versions/A/Ink
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0x7fff808b0000 - 0x7fff8092dfef libstdc++.6.dylib 7.9.0 (compatibility 7.0.0) <35ECA411-2C08-FD7D-11B1-1B7A04921A5C> /usr/lib/libstdc++.6.dylib
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0x7fff813ae000 - 0x7fff813b4ff7 com.apple.DiskArbitration 2.3 (2.3) <857F6E43-1EF4-7D53-351B-10DE0A8F992A> /System/Library/Frameworks/DiskArbitration.framework/Versions/A/DiskArbitration
0x7fff813e6000 - 0x7fff813e9ff7 libCoreVMClient.dylib ??? (???) <609598E6-195D-E5D4-3B92-AE8D9768829C> /System/Library/Frameworks/OpenGL.framework/Versions/A/Libraries/libCoreVMClient.dylib
0x7fff813ea000 - 0x7fff813fefff libGL.dylib ??? (???) <1EB1BD0F-C17F-55DF-B8B4-8E9CF99359D4> /System/Library/Frameworks/OpenGL.framework/Versions/A/Libraries/libGL.dylib
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0x7fff8185b000 - 0x7fff81876ff7 com.apple.openscripting 1.3.1 (???) <9D50701D-54AC-405B-CC65-026FCB28258B> /System/Library/Frameworks/Carbon.framework/Versions/A/Frameworks/OpenScripting.framework/Versions/A/OpenScripting
0x7fff818b9000 - 0x7fff81901ff7 libvDSP.dylib 268.0.1 (compatibility 1.0.0) <98FC4457-F405-0262-00F7-56119CA107B6> /System/Library/Frameworks/Accelerate.framework/Versions/A/Frameworks/vecLib.framework/Versions/A/libvDSP.dylib
0x7fff81940000 - 0x7fff8194ffff com.apple.NetFS 3.2.1 (3.2.1) <E5D33870-27D2-E50B-9B35-16AA50369733> /System/Library/Frameworks/NetFS.framework/Versions/A/NetFS
0x7fff81950000 - 0x7fff81a67fef libxml2.2.dylib 10.3.0 (compatibility 10.0.0) <B2FB9DA8-6EC9-FFBC-C919-C022B9CBEB73> /usr/lib/libxml2.2.dylib
0x7fff81a98000 - 0x7fff81b51fff libsqlite3.dylib 9.6.0 (compatibility 9.0.0) <2C5ED312-E646-9ADE-73A9-6199A2A43150> /usr/lib/libsqlite3.dylib
0x7fff81b52000 - 0x7fff81c07fe7 com.apple.ColorSync 4.6.3 (4.6.3) <5A7360A8-D495-1E8D-C4B4-A363AF989ADE> /System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/ColorSync.framework/Versions/A/ColorSync
0x7fff81c08000 - 0x7fff81c33ff7 libxslt.1.dylib 3.24.0 (compatibility 3.0.0) <87A0B228-B24A-C426-C3FB-B40D7258DD49> /usr/lib/libxslt.1.dylib
0x7fff81e28000 - 0x7fff81e59fff libGLImage.dylib ??? (???) <1A8E58CF-FA2F-14F7-A097-D34EEA8A7D03> /System/Library/Frameworks/OpenGL.framework/Versions/A/Libraries/libGLImage.dylib
0x7fff81e5a000 - 0x7fff81e6cfe7 libsasl2.2.dylib 3.15.0 (compatibility 3.0.0) <76B83C8D-8EFE-4467-0F75-275648AFED97> /usr/lib/libsasl2.2.dylib
0x7fff81e6d000 - 0x7fff81f2aff7 com.apple.CoreServices.OSServices 357 (357) <7B22626F-D544-1955-CC53-240F4CACEB4A> /System/Library/Frameworks/CoreServices.framework/Versions/A/Frameworks/OSServices.framework/Versions/A/OSServices
0x7fff81f2b000 - 0x7fff81f30ff7 com.apple.CommonPanels 1.2.4 (91) <4D84803B-BD06-D80E-15AE-EFBE43F93605> /System/Library/Frameworks/Carbon.framework/Versions/A/Frameworks/CommonPanels.framework/Versions/A/CommonPanels
0x7fff81f47000 - 0x7fff81f6ffff com.apple.DictionaryServices 1.1.2 (1.1.2) <E9269069-93FA-2B71-F9BA-FDDD23C4A65E> /System/Library/Frameworks/CoreServices.framework/Versions/A/Frameworks/DictionaryServices.framework/Versions/A/DictionaryServices
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0x7fff81fe5000 - 0x7fff81ff9ff7 com.apple.speech.synthesis.framework 3.10.35 (3.10.35) <621B7415-A0B9-07A7-F313-36BEEDD7B132> /System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/SpeechSynthesis.framework/Versions/A/SpeechSynthesis
0x7fff81ffa000 - 0x7fff8201dfff com.apple.opencl 12.3 (12.3) <D30A45FC-4520-45AF-3CA5-092313DB5D54> /System/Library/Frameworks/OpenCL.framework/Versions/A/OpenCL
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0x7fff82149000 - 0x7fff823cffff com.apple.security 6.1.1 (37594) <1B4E1ABD-1BB3-DA49-F574-0EEB23E73C6A> /System/Library/Frameworks/Security.framework/Versions/A/Security
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0x7fff8287e000 - 0x7fff828a4fe7 libJPEG.dylib ??? (???) <DFA5DAC2-D1C6-D5ED-F95D-AC185E98B6E7> /System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/ImageIO.framework/Versions/A/Resources/libJPEG.dylib
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0x7fff833cc000 - 0x7fff833cdff7 libScreenReader.dylib ??? (???) <D98F32A6-4729-8040-AE06-76D2F4CF9BBB> /usr/lib/libScreenReader.dylib
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0x7fff84d5e000 - 0x7fff84d63fff libGIF.dylib ??? (???) <A7BF2D68-F489-720C-E5A9-DC2B24DC5A21> /System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/ImageIO.framework/Versions/A/Resources/libGIF.dylib
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0x7fff86738000 - 0x7fff86738ff7 com.apple.Accelerate.vecLib 3.6 (vecLib 3.6) <4CCE5D69-F1B3-8FD3-1483-E0271DB2CCF3> /System/Library/Frameworks/Accelerate.framework/Versions/A/Frameworks/vecLib.framework/Versions/A/vecLib
0x7fff8687c000 - 0x7fff868c3ff7 com.apple.coreui 2 (114) <923E33CC-83FC-7D35-5603-FB8F348EE34B> /System/Library/PrivateFrameworks/CoreUI.framework/Versions/A/CoreUI
0x7fff86ab9000 - 0x7fff86b45fef SecurityFoundation ??? (???) <F43FDB02-CAA5-F8FF-C8D7-6665E7403ECE> /System/Library/Frameworks/SecurityFoundation.framework/Versions/A/SecurityFoundation
0x7fff86b46000 - 0x7fff86b63ff7 libPng.dylib ??? (???) <667C3883-32A5-CCCC-8624-972B5DFD8EA4> /System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/ImageIO.framework/Versions/A/Resources/libPng.dylib
0x7fff86b89000 - 0x7fff86baafff libresolv.9.dylib 41.0.0 (compatibility 1.0.0) <9F322F47-0584-CB7D-5B73-9EBD670851CD> /usr/lib/libresolv.9.dylib
0x7fff86bab000 - 0x7fff86e2eff7 com.apple.Foundation 6.6.4 (751.42) <AF1E3050-3503-8714-8274-EA6BD6BE8A22> /System/Library/Frameworks/Foundation.framework/Versions/C/Foundation
0x7fff86e2f000 - 0x7fff86f6dfff com.apple.CoreData 102.1 (251) <9DFE798D-AA52-6A9A-924A-DA73CB94D81A> /System/Library/Frameworks/CoreData.framework/Versions/A/CoreData
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0x7fff8718b000 - 0x7fff8718dfff libRadiance.dylib ??? (???) <6C974488-62D2-71BA-A45E-C764A0AF7354> /System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/ImageIO.framework/Versions/A/Resources/libRadiance.dylib
0x7fff871de000 - 0x7fff8721ffef com.apple.QD 3.36 (???) <5DC41E81-32C9-65B2-5528-B33E934D5BB4> /System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/QD.framework/Versions/A/QD
0x7fff87229000 - 0x7fff87264fff com.apple.AE 496.4 (496.4) <55AAD5CA-7160-7899-1C68-562ED8160DF7> /System/Library/Frameworks/CoreServices.framework/Versions/A/Frameworks/AE.framework/Versions/A/AE
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0x7fff873cf000 - 0x7fff87418fef libGLU.dylib ??? (???) <CCE779A9-2467-A5AA-A558-691E43A1105F> /System/Library/Frameworks/OpenGL.framework/Versions/A/Libraries/libGLU.dylib
0x7fff87419000 - 0x7fff8746eff7 com.apple.framework.familycontrols 2.0.2 (2020) <A3CFF697-B9DB-A7E5-3B39-9DA9B34F0595> /System/Library/PrivateFrameworks/FamilyControls.framework/Versions/A/FamilyControls
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0x7fff884b9000 - 0x7fff884c7ff7 libkxld.dylib ??? (???) <27713C39-0E51-8F5A-877B-C5539C96A520> /usr/lib/system/libkxld.dylib
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0x7fffffe00000 - 0x7fffffe01fff libSystem.B.dylib ??? (???) <F00A8B2F-84A0-0868-1047-3A13F9114864> /usr/lib/libSystem.B.dylib
I have found out via testing about our issues. One question I had for you, is how are you starting the script? Is it started from logging on the machine and starting a terminal in the Mac OSX desktop screen? Or are you ssh'ing into the Mac and starting it from there.
On our daemon that was trying to use the Window Manager (firefox), if we started it via the Terminal.app from the logged in user. It would work fine. If we ssh'd in to start the script (which happens when you use Capistrano to start it) it would work fine until that ssh session was stopped. In the Console you can see the logs:
2/7/11 8:32:13 PM com.apple.SecurityServer[22] Session 0x22058d0 destroyed
2/7/11 8:32:13 PM com.apple.SecurityServer[22] Session 0x22058d0 dead
2/7/11 8:32:13 PM com.apple.SecurityServer[22] Killing auth hosts
This happens after we terminate the SSH session. After it terminates, we would get the errors like you did:
abort() called
LaunchServices: GetOurLSSessionIDInit() returned err #1,
securitySessionID == 0x0, vers=10600000 uid=501 euid=501
Instead of starting the script via ssh, we now have a LaunchAgent which will start the script based on WatchPaths with a ~/jobs/ directory. It works out well, and we can still restart the server with capistrano.
I would look in your logs to see if the SecurityServer is destroying a session right about the time the script fails. If so, then maybe you can figure out what is causing the timeout.