unison_sync.sh
#!/bin/bash
pref=my_unison_pref
pid=`pgrep unison`
[ -z $pid ] && $HOME/bin/unison $pref -auto -batch
unison_sync.plist
<?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>unison_sync</string>
<key>ProgramArguments</key>
<array>