Python| os.geteuid() 和 seteuid() 方法
Python中的OS 模块提供了与操作系统交互的功能。操作系统属于 Python 的标准实用程序模块。该模块提供了一种使用操作系统相关功能的可移植方式。
os 模块中的所有函数在文件名和路径无效或不可访问的情况下,或具有正确类型但操作系统不接受的其他参数的情况下引发OSError 。
Python中的os.geteuid()
方法用于获取当前进程的有效用户id, os.seteuid()
方法用于设置当前进程的有效用户id。
有效用户 ID :通常与真实用户 ID 相同,但已更改为允许非特权用户访问只能由 root 访问的文件。有效用户 ID 用于大多数访问检查。它还用作进程创建的文件的所有者。
注意: os.seteuid()
和os.geteuid()
方法仅在 UNIX 平台上可用,并且os.seteuid()
方法的功能通常仅对超级用户可用,因为只有超级用户可以更改用户 ID。
超级用户是指具有在操作系统中运行或执行任何程序的所有权限的 root 用户或管理用户。
os.geteuid() 方法
Syntax: os.geteuid()
Parameter: No parameter is required
Return Type: This method returns an integer value which represents the current process’s effective user id.
# Python program to explain os.geteuid() method
# importing os module
import os
# Get the effective user ID
# of the current process
# using os.geteuid() method
euid = os.geteuid()
# Print the effective user ID
# of the current process
print("Effective user ID of the current process:", euid)
Effective user ID of the current process: 1000
os.seteuid() 方法
Syntax: os.seteuid(euid)
Parameter:
euid: An integer value representing new effective user ID for the current process.
Return Type: This method does not return any value.
# Python program to explain os.seteuid() method
# importing os module
import os
# Get the effective user ID
# of the current process
# using os.geteuid() method
euid = os.geteuid()
# Print the effective user ID
# of the current process
print("Effective user ID of the current process:", euid)
# Change effective user ID
# of the current process
# using os.seteuid() method
euid = 100
os.seteuid(euid)
print("Effective user ID changed")
# Print the effective user ID
# of the current process
euid = os.geteuid()
print("Effective user ID of the current process:", euid)
Effective user ID of the current process: 0
Effective user ID changed
Effective user ID of the current process: 1000