Homebrew JS Service Framework

[Jason Robitaille]

Homebrew JS Service Framework v1.0.0

HP webOS 2.0 brought with it javascript system services. These services are run via Node.js and are amazingly powerful. So naturally, HP locked down third party services with a jailer. For homebrew however, full system root access is a must.

This homebrew js service framework remedies the situation. It adds a custom script to /var/usr/bin/run-homebrew-js-service

All a homebrew service needs to do different from standard service format is to include a custom dbus file which uses the custom script. The end result is that the service will run as root, with full system access (needed for services like FileMgr and SysToolsMgr).

SOURCE: homebrew-js-service-framework - Project Hosting on Google Code

P|C Homebrew Gallery: Homebrew JS Service Framework | PreCentral.net | The #1 Palm Pre and Pixi Community


Change Log
v1.0.0 - March 4, 2011
- Initial public release!

[GyroJoe]

Here's a good tutorial on using this. Helped me out a lot:
Using the Homebrew Javascript Service Framework « Coding for Mobile Platforms

One thing it doesn't seem to mention is that you need to reboot? to get dbus to pick up the new files.

[hemisphire]

Ok, I'm missing something here:
# ipkg install /media/internal/ca.canucksoftware.js-service-framework_1.0.1_all.ipk -force-depends

Begin installation of ca.canucksoftware.js-service-framework
Installing ca.canucksoftware.js-service-framework (1.0.1) to root...
Configuring ca.canucksoftware.js-service-framework
rmdir: 'media/cryptofs/apps/usr/palm/applications/ca.canucksoftware.js-service-framework': No such file or directory
install: can't stat 'media/cryptofs/apps/usr/bin/run-homebrew-js-service': No such file or directory

[GyroJoe]

It doesn't have an app per say - all it really does is install the run-homebrew-js-service script. The one in Preware installs, not sure if it's different.

FileMgr depends on it.

[Jason Robitaille]

Originally Posted by hemisphire

Ok, I'm missing something here:
# ipkg install /media/internal/ca.canucksoftware.js-service-framework_1.0.1_all.ipk -force-depends

Begin installation of ca.canucksoftware.js-service-framework
Installing ca.canucksoftware.js-service-framework (1.0.1) to root...
Configuring ca.canucksoftware.js-service-framework
rmdir: 'media/cryptofs/apps/usr/palm/applications/ca.canucksoftware.js-service-framework': No such file or directory
install: can't stat 'media/cryptofs/apps/usr/bin/run-homebrew-js-service': No such file or directory

Try installing with WOSQI

[FoxFireX]

I've started working on a minor little app that needs root command line access to get its job done, and was pointed to this framework. I think I have everything set up according to the steps in the tutorial linked above, but even after a restart, running the id command from my service returns a uid of prisoner in group jailusers. Any suggestions on how/where to start troubleshooting this?

[Jason Robitaille]

Originally Posted by FoxFireX

I've started working on a minor little app that needs root command line access to get its job done, and was pointed to this framework. I think I have everything set up according to the steps in the tutorial linked above, but even after a restart, running the id command from my service returns a uid of prisoner in group jailusers. Any suggestions on how/where to start troubleshooting this?

You'll want to check and make sure the replacement dbus is being put in place. May need to doublecheck that you packaged it correctly

[FoxFireX]

Looks like what I was missing was actually adding the script files to the IPK before installing. Didn't know that they wouldn't be automatically included by palm-package, though in retrospect I'm not sure why I thought they would be. Now that I'm adding those, things seem to be working better.

[Technarch]

Hi Jason: I was wondering if homebrew-js-framework needs an update for 3.0.4 compatibility? I am trying to get TouchPlayer to work, and its install validation states that the homebrew-js-service could not be found and that it's not running as root.

I have tried installing it with both preware and webosquickinstaller 4.3.1. Same results with both.

Used to work with TouchPlayer (older versions) with 3.0.2, this is why I am checking to see if 3.0.4 changed something because the script was updated before the release of 3.0.4

Thanks!

[Technarch]

root@HPTouchPad:/var/usr/bin# run-homebrew-js-service
Failure writing to tasks file "/var/palm/ls2" : {"message":"EBADF, Bad file descriptor '/var/palm/ls2'","stack":"Error: EBADF, Bad file descriptor '/var/palm/ls2'\n at Object.openSync (fs.js:221:18)\n at Object.writeFileSync (fs.js:483:15)\n at writeGroupFile (/usr/palm/services/jsservicelauncher/bootstrap-node.js:54:13)\n at Object.<anonymous> (/usr/palm/services/jsservicelauncher/bootstrap-node.js:131:9)\n at Module._compile (module.js:408:26)\n at Object..js (module.js:414:10)\n at Module.load (module.js:340:31)\n at Function._load (module.js:301:12)\n at Array.0 (module.js:427:10)\n at EventEmitter._tickCallback (node.js:136:26)","errno":9,"code":"EBADF","path":"/var/palm/ls2"}
parsing services.json failed with:SyntaxError: Unexpected end of input

node.js:144
throw e; // process.nextTick error, or 'error' event on first tick
^
TypeError: Cannot read property 'length' of undefined
at Object.<anonymous> (/usr/palm/services/jsservicelauncher/bootstrap-node.js:160:32)
at Module._compile (module.js:408:26)
at Object..js (module.js:414:10)
at Module.load (module.js:340:31)
at Function._load (module.js:301:12)
at Array.<anonymous> (module.js:427:10)
at EventEmitter._tickCallback (node.js:136:26)
root@HPTouchPad:/var/usr/bin#