homebrew.mxcl.nginx.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>Label</key>
    <string>homebrew.mxcl.nginx</string>
    <key>RunAtLoad</key>
    <true/>
    <key>KeepAlive</key>
    <false/>
    <key>ProgramArguments</key>
    <array>
        <string>#{opt_prefix}/sbin/nginxsudo</string>
        <string>-g</string>
        <string>daemon off;</string>
    </array>
    <key>WorkingDirectory</key>
    <string>/usr/local</string>
  </dict>
</plist>

nginxsudo.sh

#!/bin/sh
function on_die() {
  sudo "`which nginx`" -s stop
  exit 0
}
trap on_die TERM
sudo "`which nginx`" $@ &
wait