Python | os.setreuid() method

OS module in Python provides functions for interacting with the operating system. OS comes under Python’s standard utility modules. This module provides a portable way of using operating system dependent functionality.

All functions in os module raise OSError in the case of invalid or inaccessible file names and paths, or other arguments that have the correct type, but are not accepted by the operating system.

os.setreuid() method in Python is used to set the current process’s real and effective user ids.

Every user in Unix like operating system is identified by different integer number, this unique number is called as UserID. Real UserID represents account of the owner of the process. It defines which files that this process has access to. Effective UserID is normally same as Real UserID, but sometimes it is changed to enable a non-privileged user to access files that can only be accessed by root.

Note: os.setreuid() method is only available on UNIX platforms and functionality of this method is typically available only to the superuser.
Superuser means a root user or an administrative user who has all the permissions to run or execute any program in the operating system.

Syntax: os.setreuid(ruid, euid)

Parameters:
ruid: An integer value representing new user id for the current process.
euid: An integer value representing new effective user id for the current process.

Return Type: This method does not return any value.

Code: Use of os.setreuid() method

filter_none

edit
close

play_arrow

link
brightness_4
code

# Python program to explain os.setreuid() method 
  
# importing os module 
import os
  
  
# Get the current process’s 
# real user id
# using os.getuid() method
ruid = os.getuid()
  
# Get the current process’s 
# effective user id.
# using os.geteuid() method
euid = os.geteuid()
  
  
# Print the current process’s
# real and effective user id.
print("Real user id of the current process:", ruid)
print("Effective user id of the current process:", euid)
  
  
# Change the current process’s
# real and effective user ids
# using os.setreuid() method
ruid = 100
euid = 200
os.setreuid(ruid, euid)
print("\nReal and effective user ids changed\n")
  
  
# Get the current process’s 
# real and effective user ids
ruid = os.getuid()
euid = os.geteuid()
  
  
# Print the current process’s
# real and effective user id.
print("Real user id of the current process:", ruid)
print("Effective user id of the current process:", euid)

chevron_right


Output:

Real user id of the current process: 0
Effective user id of the current process: 0

Real and effective user ids changed

Real user id of the current process: 100
Effective user id of the current process: 200

os.setreuid() method output



My Personal Notes arrow_drop_up

self motivated and passionate programmer

If you like GeeksforGeeks and would like to contribute, you can also write an article using contribute.geeksforgeeks.org or mail your article to contribute@geeksforgeeks.org. See your article appearing on the GeeksforGeeks main page and help other Geeks.

Please Improve this article if you find anything incorrect by clicking on the "Improve Article" button below.




Article Tags :

Be the First to upvote.


Please write to us at contribute@geeksforgeeks.org to report any issue with the above content.