在Mac OS X中，/etc/rc.common的默认内容是什么？

#!/bin/sh
##
# rc.common
#
# This script is executed at the end of each multiuser runlevel.
# Make sure that the script will "exit 0" on success or any other
# value on error.
##

# Set the system-wide PATH variable
export PATH="/usr/bin:/bin:/usr/sbin:/sbin"

# Load system-wide environment variables
if [ -r /etc/paths ]; then
    source /etc/paths
fi

# Load system-wide shell configuration
if [ -r /etc/bashrc ]; then
    source /etc/bashrc
fi

# Start system daemons
if [ -x /usr/sbin/syslogd ]; then
    /usr/sbin/syslogd
fi

if [ -x /usr/sbin/ntpd ]; then
    /usr/sbin/ntpd -n -g -p /var/run/ntpd.pid
fi

# Run additional startup scripts
if [ -d /etc/rc.d ]; then
    for file in /etc/rc.d/*; do
        if [ -x "$file" ]; then
            "$file"
        fi
    done
fi

exit 0