Launchd will not execute plist. Where am I going wrong

launchd

I am trying to create a plist for a unix executable. The executable works perfectly well when I run it in Terminal. However I simply cannot get it to run from launchd. Here are the steps I took:

sudo touch /Library/LaunchDaemons/Parity.plist

sudo nano /Library/LaunchDaemons/Parity.plist

Then I input the following data:

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple Computer//DTD PLIST 1.0//EN" 
 "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
  <plist version="1.0">
    <dict>
      <key>Label</key>
        <string>Parity</string>
      <key>ProgramArguments</key>
        <array>
          <string>/usr/local/Cellar/parity/1.5.12/bin/parity</string>
          <string>start</string>
        </array>
      <key>RunAtLoad</key>
        <true/>
      <key>KeepAlive</key>
        <true/>
   </dict>
</plist>

If I run:

sudo launchctl load /Library/LaunchDaemons/parity.plist

I get the response:

/Library/LaunchDaemons/Parity.plist: service already loaded

Does anyone have any suggestions?

Best Answer

It turns out that the cause of the error was a poorly written plist - <string>start</string> was instructing the exec file to run a start command when initiating the daemon, which was causing it to crash. I erased that line from the plist and now it behaves as I had intended.

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