Library search paths, daemon startupitem and launchd

[Tom Davis]

Hello,

I'm trying to write a portfile for iguanaIR (http://iguanaworks.net/projects/IguanaIR). I'm having difficulties starting a daemon using startupitem.executable. When I try to start the daemon with:

	sudo launchctl load -w /Library/LaunchDaemons/org.macports.iguanaIR.plist

igdaemon crashes. Here's part of the CrashReporter log:

	Dyld Error Message:
	  Library not loaded: libiguanaIR.dylib
	  Referenced from: /opt/local/bin/igdaemon
	  Reason: image not found

The libiguanaIR.dylib library is part of the iguanaIR distribution and is in /opt/local/lib after a port install. otool shows that libiguanaIR.dylib is the only library without an absolute path:

	Rett:~ tom$ otool -L /opt/local/bin/igdaemon
	/opt/local/bin/igdaemon:
	/System/Library/Frameworks/CoreFoundation.framework/Versions/A/CoreFoundation (compatibility version 150.0.0, 			current version 550.13.0)
	/System/Library/Frameworks/IOKit.framework/Versions/A/IOKit (compatibility version 1.0.0, current version 275.0.0)
	libiguanaIR.dylib (compatibility version 1.0.0, current version 1.0.0)
	/opt/local/lib/libpopt.0.dylib (compatibility version 1.0.0, current version 1.0.0)
	/opt/local/lib/libusb-0.1.4.dylib (compatibility version 9.0.0, current version 9.4.0)
	/usr/lib/libSystem.B.dylib (compatibility version 1.0.0, current version 125.0.0)

I'm guessing this is because it's not linked with the -l switch because libiguanaIR.dylib is not installed at the time igdaemon is built.

My .profile is setup to search /opt/local/lib for libraries:

	Rett:~ tom$ env | grep LIB
	DYLD_FALLBACK_LIBRARY_PATH=/opt/local/lib:
	LIBRARY_PATH=/opt/local/lib
	DYLD_LIBRARY_PATH=/Applications/MATLAB_R2009a.app/bin/mac:/Applications/MATLAB_R2009a.app/sys/os/mac:

If I run igdaemon from the command line, everything works fine. 

If I copy libiguanaIR.dylib to /usr/local/lib and use launchctl, everything works fine.  If I add the following lines to org.macports.iguanaIR.plist:

	<key>EnvironmentVariables</key>
	<dict>
	 <key>DYLD_FALLBACK_LIBRARY_PATH</key> <string>/opt/local/lib</string>
	 </dict>

or
	<key>WorkingDirectory</key>
	<string>/opt/local/lib</string>

then everything works fine. 

/Library/LaunchDaemons must be started by sudo, But sudo strips environmental variables such as DYLD_FALLBACK_LIBRARY_PATH for security reasons. 

So, what is the correct way to get a daemon to search /op/local/lib? Is there a way to add the EnvironmentVariables key to the launchctl plist using portfile settings? 

Tom