python 下chmod方法简单介绍

         闲着无聊，想着如何能用python完全替代shell来管理服务器，呵呵，这个想法实在疯狂，首先来介绍下os模块下的chmod这个方法来替代shell下chmod这个命令呢，下面来看看这个方法的使用：

       os.chmod(path,mode)   这个方法应该很简单，只需要2个参数，一个是路径，一个是说明路径的模式，下面列出了这个用法中可以使用的一些常用的模式：

• stat.S_ISUID: Set user ID on execution.                      不常用
• stat.S_ISGID: Set group ID on execution.                    不常用
• stat.S_ENFMT: Record locking enforced.                                          不常用
• stat.S_ISVTX: Save text p_w_picpath after execution.                                在执行之后保存文字和图片
• stat.S_IREAD: Read by owner.                                                          
• 对于拥有者读的权限
• stat.S_IWRITE: Write by owner.                                                         
• 对于拥有者写的权限
• stat.S_IEXEC: Execute by owner.                                                       
• 对于拥有者执行的权限
• stat.S_IRWXU: Read, write, and execute by owner.                          对于拥有者读写执行的权限
• stat.S_IRUSR: Read by owner.                                                           
• 对于拥有者读的权限
• stat.S_IWUSR: Write by owner.                                                          
• 对于拥有者写的权限
• stat.S_IXUSR: Execute by owner.                                                      
• 对于拥有者执行的权限
• stat.S_IRWXG: Read, write, and execute by group.                         
• 对于同组的人读写执行的权限
• stat.S_IRGRP: Read by group.                                                            
• 对于同组读的权限
• stat.S_IWGRP: Write by group.                                                     
• 对于同组写的权限
• stat.S_IXGRP: Execute by group.                                                      
• 对于同组执行的权限
• stat.S_IRWXO: Read, write, and execute by others.                        
•   对于其他组读写执行的权限
• stat.S_IROTH: Read by others.                                                         
• 对于其他组读的权限
• stat.S_IWOTH: Write by others.                                                      
•    对于其他组写的权限
• stat.S_IXOTH: Execute by others.                                                     
• 对于其他组执行的权限

介绍以上这么多的模式，下面来看下实际的操作吧:

   1:  In [36]: import os

   2:   

   3:  In [37]: import stat

   4:   

   5:  In [38]: !touch abc

   6:   

   7:  In [39]: !ls -l abc

   8:  -rw-r--r-- 1 root root 0  6月  9 11:15 abc

   9:   

  10:  In [40]: os.chmod('abc',stat.S_IREAD)

  11:   

  12:  In [41]: !ls -l abc

  13:  -r-------- 1 root root 0  6月  9 11:15 abc

  14:   

  15:   

  16:  In [43]: os.chmod('abc',stat.S_IREAD+stat.S_IWOTH)

  17:   

  18:  In [44]: !ls -l abc

  19:  -r------w- 1 root root 0  6月  9 11:15 abc

  20:   

  21:  In [45]: os.chmod('abc',stat.S_IREAD+stat.S_IWOTH+stat.S_IXUSR)

  22:   

  23:  In [46]: !ls -l abc

  24:  -r-x----w- 1 root root 0  6月  9 11:15 abc

  25:   

  26:  In [47]: os.chmod('abc',stat.S_IREAD+stat.S_IWOTH+stat.S_IXUSR+stat.S_IRWX)

  27:  stat.S_IRWXG  stat.S_IRWXO  stat.S_IRWXU

  28:   

  29:  In [47]: os.chmod('abc',stat.S_IREAD+stat.S_IWOTH+stat.S_IXUSR+stat.S_IRWXO)

  30:   

  31:  In [48]: !ls -l abc

  32:  -r-x--x--x 1 root root 0  6月  9 11:15 abc

  33:   

  34:  In [49]: os.chmod('abc',stat.S_IRWX)

  35:  stat.S_IRWXG  stat.S_IRWXO  stat.S_IRWXU

  36:   

  37:  In [49]: os.chmod('abc',stat.S_IRWXO+stat.S_IRW)

  38:  stat.S_IRWXG  stat.S_IRWXO  stat.S_IRWXU

  39:   

  40:  In [49]: os.chmod('abc',stat.S_IRWXO+stat.S_IRWXG+stat.S_IRWX)

  41:  stat.S_IRWXG  stat.S_IRWXO  stat.S_IRWXU

  42:   

  43:  In [49]: os.chmod('abc',stat.S_IRWXO+stat.S_IRWXG+stat.S_IRWXO)

  44:   

  45:  In [50]: !ls -l abc

  46:  ---x---rw- 1 root root 0  6月  9 11:15 abc

  47:   

  48:  In [51]: