Python | os.setregid() 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.setregid() method in Python is used to set the current process’s real and effective group ids. However, we can set the current process’s real and effective group ids individually using os.setgid() and os.setegid() method respectively.



Note: os.setregid() 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.setregid(rgid, egid)

Parameters:
rgid: An integer value representing new group id for the current process.
egid: An integer value representing new effective group id for the current process.

Return Type: This method does not return any value.

Code: Use of os.setregid() method

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# Python program to explain os.setregid() method 
  
# importing os module 
import os
  
  
# Get the current process’s 
# real group id
# using os.getgid() method
rgid = os.getgid()
  
# Get the current process’s 
# effective group id.
# using os.getegid() method
egid = os.getegid()
  
  
# Print the current process’s
# real and effective group ids.
print("Real group id of the current process:", rgid)
print("Effective group id of the current process:", egid)
  
  
# Change the current process’s
# real and effective group ids
# using os.setregid() method
rgid = 100
egid = 200
os.setregid(rgid, egid)
print("\nReal and effective group ids changed\n")
  
  
# Get the current process’s 
# real and effective group ids
rgid = os.getgid()
egid = os.getegid()
  
  
# Print the current process’s
# real and effective group ids.
print("Real group id of the current process:", rgid)
print("Effective group id of the current process:", egid)
  
  
# We can also use os.setgid() and
# os.setegid() method to set the
# current process’s real and
# effective group ids respectively
  
  
# Change the current process’s
# real group id
# using os.setgid() method
rgid = 300
os.setgid(rgid)
  
  
# Change the current process’s
# effective group id
# using os.setegid() method
egid = 400
os.setegid(egid)
  
print("\nReal and effective group ids changed\n")
  
  
# Print the current process’s
# real and effective group ids.
print("Real group id of the current process:", rgid)
print("Effective group id of the current process:", egid)

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Output:
os.setregid() method output



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