Launchctl ignores parameters in given launchd.plist, doesn't pass arguments

Question

*Here's my plist:*
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
<key>Debug</key>
<true/>
<key>ExitTimeOut</key>
<integer>0</integer>
<key>GroupName</key>
<string>wheel</string>
<key>KeepAlive</key>
<false/>
<key>Label</key>
<string>org.earlywine.backup.toDMG</string>
<key>LowPriorityIO</key>
<false/>
<key>Program</key>
<string>/usr/share/org.earlywine.backup/toDMG/Backup.bash</string>
<key>ProgramArguments</key>
<array>
<string>/Volumes/Home</string>
<string>/Volums/Backup/Backups</string>
</array>
<key>RunAtLoad</key>
<false/>
<key>StandardErrorPath</key>
<string>/Library/Logs/org.earlywine.backup.toDMG/stderr.txt</string>
<key>StandardOutPath</key>
<string>/Library/Logs/org.earlywine.backup.toDMG/stdout.txt</string>
<key>TimeOut</key>
<integer>0</integer>
<key>UserName</key>
<string>root</string>
<key>WorkingDirectory</key>
<string>/usr/share/org.earlywine.backup/toDMG</string>
</dict>
</plist>
*Launchctl fails to honor parameters given to it in the plist.* Specifically, as an administrator, when running sudo launchctl, then giving it the load command and following it up with a list for the job label, here's what I'm shown:
launchd% list org.earlywine.backup.toDMG
"Label" = "org.earlywine.backup.toDMG";
"LimitLoadToSessionType" = "System";
"OnDemand" = true;
"LastExitStatus" = 0;
"TimeOut" = 0;
"Program" = "/usr/share/org.earlywine.backup/toDMG/Backup.bash";
"StandardOutPath" = "/Library/Logs/org.earlywine.backup.toDMG/stdout.txt";
"StandardErrorPath" = "/Library/Logs/org.earlywine.backup.toDMG/stderr.txt";
"ProgramArguments" = (
"/Volumes/Home";
"/Volums/Backup/Backups";
It's not clear at all based upon the man pages why the following arguments in the plist are not shown: Debug, GroupName, UserName, ExitTimeOut, LowPriorityIO, and WorkingDirectory.
I can confirm, that as a regular user, after loading and starting the jog, Console logs that the GroupName and UserName properties are ignored (documented in the man page). This is expected, and results in errors when the stdout and stderr files are attempted to be opened.
*When started from any user's launchctl session, the script exits as though it wasn't given arguments.* This is evidenced by the usage() I have it print to stderr. The script checks to see if it was given 2 or more parameters, and if not, prints the usage and exits.
I'm sure the script works properly - I've given myself sudoers rights to the Bash script, and can run it by hand without issue, as in:
% sudo /usr/share/org.earlywine.backup/toDMG/Backup.bash /Volumes/Home /Volumes/Backup/Backups
The plist is symlinked at /Library/LaunchDaemons/org.earlywine.backup.toDMG.plist and is in the launchctl list when an administrator sudo's into a launchctl session.
*Behavior via the rc.shutdown.local script doesn't even equal that of a sudo'd launchctl session.*
Here's my rc.shutdown.local script:
#!/bin/bash
launchctl start org.earlywine.backup.toDMG
*Console logs the following as a result of the shutdown:*
Nov 17 21:06:19 Tiznit com.apple.SystemStarter[39]: org.earlywine.backup.toDMG: Invalid argument
Nov 17 21:06:19 Tiznit com.apple.SystemStarter[39]: launchctl start error: No such process
Nov 17 21:06:19 Tiznit SystemStarter[39]: /bin/sh exit status: 1
Based upon that message, I'd say that launchctl doesn't have the job loaded start. Despite that hunch, inserting into the shutdown script "launchctl load ..." in the line above the start makes no difference.
The manual pages for SystemStarter and launchd do not discuss the operating environment of SystemStarter and the resulting bash script that it runs.
It would be great if I could get some assistance with this, even though I'm running Leopard on an "unsupported" Mac.

Answer 1

I suggest posting to the Unix forum under OS X Technologies.