用户注销时的脚本执行（非root用户）

我在大学实验室里统一运行ubuntu 12.10，没有root权限。我需要在注销时运行脚本。这可能吗？

注意：这可能是此问题的重复，但是给出的答案是非常隐晦的，没有给出具体说明。

这是gnome_save_yourself方法的逐步过程。让我们做一个测试。

1. 将以下代码另存为~/Desktop/execute_script_on_shutdown.sh （来自http://www.linuxquestions.org/questions/linux-desktop-74/gnome-run-script-on-logout-724453/#post3560301）

   #!/usr/bin/env python
   
   #Author: Seamus Phelan
   
   #This program runs a custom command/script just before gnome shuts 
   #down.  This is done the same way that gedit does it (listening for 
   #the 'save-yourself' event).  This is different to placing scipts 
   #in /etc/rc#.d/ as the script will be run before gnome exits.
   #If the custom script/command fails with a non-zero return code, a 
   #popup dialog box will appear offering the chance to cancel logout
   #
   #Usage: 1 - change the command in the 'subprocess.call' in 
   #           function 'session_save_yourself' below to be what ever
   #           you want to run at logout.
   #       2 - Run this program at every gnome login (add via menu System 
   #           -> Preferences -> Session)
   # 
   #
   
   import sys
   import subprocess
   import datetime
   
   import gnome
   import gnome.ui
   import gtk
   
   
   class Namespace: pass
   ns = Namespace()
   ns.dialog = None
   
   
   def main():
       prog = gnome.init ("gnome_save_yourself", "1.0", gnome.libgnome_module_info_get(), sys.argv, [])
       client = gnome.ui.master_client()
       #set up call back for when 'logout'/'Shutdown' button pressed
       client.connect("save-yourself", session_save_yourself)
       client.connect("shutdown-cancelled", shutdown_cancelled)
   
   
   def session_save_yourself( *args):
           #Lets try to unmount all truecrypt volumes
   
   
       #execute shutdowwn script
       #########################################################################################
       retcode = subprocess.call("bash /home/totti/Desktop/shutdown_script.sh", shell=True)
       ##########################################################################################
       if retcode != 0:
           #command failed  
           show_error_dialog()
       return True
   
   def shutdown_cancelled( *args):
       if ns.dialog != None:
           ns.dialog.destroy()
       return True
   
   
   def show_error_dialog():
       ns.dialog = gtk.Dialog("There was a problem running your pre-shutdown script",
                              None,
                              gtk.DIALOG_MODAL | gtk.DIALOG_DESTROY_WITH_PARENT,
                              ("There was a problem running your pre-shutdown script - continue logout", gtk.RESPONSE_ACCEPT))
       if ns.test_mode == True:
           response = ns.dialog.run()
           ns.dialog.destroy()
       else:
           #when in shutdown mode gnome will only allow you to open a window using master_client().save_any_dialog()
           #It also adds the 'Cancel logout' button
           gnome.ui.master_client().save_any_dialog(ns.dialog)
   
   
   
   #Find out if we are in test mode???
   if len(sys.argv) >=2 and sys.argv[1] == "test":
       ns.test_mode = True
   else:
       ns.test_mode = False
   
   if ns.test_mode == True:
       main()
       session_save_yourself()
   else:
       main()
       gtk.main() 

2. 使它可执行：

   chmod +x ~/Desktop/execute_script_on_shutdown.sh

3. 将以下内容另存为 ~/Desktop/shutdown_script.sh

   #!/usr/bin/bash
   touch ~/Desktop/AAAAAAAAAAAAAAAAAAAAAAAAAAA  

4. 执行主脚本

   bash ~/Desktop/execute_script_on_shutdown.sh

现在您感觉脚本正在等待某事

1. 注销或关闭操作系统（Ubuntu）
2. 登录

3. 检查AAAAAAAAAAAAAAAAAAAAAAAAAAA在桌面上命名的文件。

   ls -l ~/Desktop/AAAAAAAAAAAAAAAAAAAAAAAAAAA

如果看到文件，则一切正常。现在，您可以编辑shutdown_script.sh以满足您的需要。还请记住execute_script_on_shutdown.sh在登录时执行（或使其在启动时自动可执行）。