XML : OSX: Will these plists run properly? I want them to to load and run a script at boot time AND login

I will put this plist in /Library/LaunchDaemons/

  <?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>Label</key>      <string>info.kylebirch.system.plist</string>      <key>Program</key>      <string>/etc/rc.wakeup</string>      <key>RunAtLoad</key>      <true/>  </dict>  </plist>    

and an almost exact copy in /Library/LaunchAgents

  <?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>Label</key>      <string>info.kylebirch.user.plist</string>      <key>Program</key>      <string>/etc/rc.wakeup</string>      <key>RunAtLoad</key>      <true/>  </dict>  </plist>    

Will these execute rc.wakeup on both bootup AND login? Also, are there any edge cases? Are there any extenuating circumstances that would create unpredictable output? If so, how do I handle such situations?