Upstart 显示不存在的进程正在运行

Question

我在 Ubuntu-1210-quantal-64-minimal 上使用 upstart 1.8-0ubuntu1。

它显示 nginx 正在运行，但实际上并没有。

# service nginx status
nginx start/running, process 2543
# ps -p 2543
PID TTY          TIME CMD

我的配置：

# nginx

description "nginx http daemon"
author "George Shammas <[email protected]>"

start on (filesystem and net-device-up IFACE=lo)
stop on runlevel [!2345]

env DAEMON=/opt/nginx/sbin/nginx
env PID=/opt/nginx/logs/nginx.pid

expect fork
#respawn
#respawn limit 10 5
#oom never

pre-start script
        $DAEMON -t
        if [ $? -ne 0 ]
                then exit $?
        fi
end script

exec $DAEMON