Ubuntu changes to the shutdown of the network connection before the shutdown screen appears

Mdm.conf Interface off service configuration

# MDM-MDM Display Manager
#
# The Display Manager service manages the X servers running on the
# system, providing login and Auto-login services

Description "MDM Display Manager"
Author "Linux Mint <root@linuxmint.com>"

#表示只有当事件filesystem被激活且 (when running at a level that is not shutdown and restart) and (the Dbus service is already started) and (Card0 has already been added or Udev-fallback-graphics service has been shut down), this service starts
Start On (filesystem
and RunLevel [!06]
and started Dbus
and (drm-device-added card0 Primary_device_for_display=1
or stopped udev-fallback-graphics))
or RunLevel prevlevel=s)

Turn off this service when #表示当系统运行在关机, single user, reboot state
Stop on RunLevel [016]

#以下是注册3个事件到upstart事件驱动中
Emits Login-session-start
Emits Desktop-session-start
Emits Desktop-shutdown

#以下为进行服务启动后的处理过程
Script
If [-N "$UPSTART _events"]
Then
# Check kernel command-line for inhibitors unless we are being called
# Manually
For ARG in $ (cat/proc/cmdline); Todo
If ["$ARG" = "text"]; Then
#plymouth为开机, Shutdown screen Program
Plymouth Quit | | :
Stop
Exit 0
Fi
Done

if [-f/etc/x11/default-display-manager]; Then
["$ (Cat/etc/x11/default-display-manager 2>/dev/null)" = "/USR/SBIN/MDM"] | | {stop; exit 0;}
Else
Type LIGHTDM >/dev/null 2>&1 && {stop; exit 0;} | | True
Fi

If ["$RUNLEVEL" = S-o "$RUNLEVEL" = 1]
Then
# Single-user Mode
Plymouth Quit | | :
Exit 0
Fi
Fi
Test the existence of various environment scripts and load environment variables
Test-f/etc/profile &&. /etc/profile

Back to the column page: http://www.bianceng.cnhttp://www.bianceng.cn/OS/Linux/

if [-r/etc/default/locale]; Then
. /etc/default/locale
Export LANG LANGUAGE lc_messages lc_all
elif [-r/etc/environment]; Then
. /etc/environment
Export LANG LANGUAGE lc_messages lc_all
Fi

EXEC MDM
End Script
#以下为停止此服务后需要进行的处理
Post-stop Script
If ["$UPSTART _stop_events" = RunLevel]; Then
#得到当前网络连接 (there may be multiple), turn off
Netlinklist= ' Less/proc/net/if_inet6 | Grep-v Lo | Grep-v Vmnet | awk ' {print $} '
echo "Netlist is $netlinklist" >>/home/xxx/shutdownlog1
For node in $netlinklist
Todo
echo "node is $node" >>/home/xxx/shutdownlog2
/sbin/ifconfig $node Down
Done
#激活desktop-shutdown Event triggers the shutdown screen, note the location of the Desktop-shutdown in the plymouth.conf configuration file below
Initctl Emit Desktop-shutdown
Fi
End Script

Shutdown Screen Configuration script:
# plymouth-userspace Bootsplash Utility
#
# Plymouth provides a boot splash screen on the system console using
# The Kernel framebuffer device. On boot, which is nominally started by
# The Initramfs so the Pre-start script, script and Post-start script
# parts are actually not run. These are normally run on shutdown instead.

Description "Userspace Bootsplash utility"

Start On (starting Mountall
or (RunLevel [016]
and (Desktop-shutdown
or Stopped XDm
or stopped Uxlaunch))

#此任务调用fork成为一个进程进行处理
Expect fork
#upstart对此服务最多等待60秒, over to kill this process
Kill Timeout 60

Script
If ["$RUNLEVEL" = "0"-o "$RUNLEVEL" = "1"-o "$RUNLEVEL" = "6"]; Then
#若是关机, restart, single user running state, the execution of the shutdown screen
EXEC/SBIN/PLYMOUTHD--mode=shutdown
Else
#执行开机画面
EXEC/SBIN/PLYMOUTHD--mode=boot--attach-to-session
Fi
End Script

#当服务启动后, execute the following script
Post-start Script
If ["$RUNLEVEL" = "0"-o "$RUNLEVEL" = "1"-o "$RUNLEVEL" = "6"]; Then
#执行关机动画
Exec/bin/plymouth Show-splash
Fi
End Script

#pre-stop Exec/bin/plymouth quit
Pre-stop Script
Exec/bin/plymouth quit
End Script

Author: csdn Blog Yygydjkthh