prefer getpass.getuser() over os.getlogin()

os.getlogin() returns an undesired value in a runuser environment and is
not overridable with environment.

1 files changed, 2 insertions, 1 deletions

diff --git a/linuxnamespaces/idmap.py b/linuxnamespaces/idmap.py
index a10ec12..8f33d70 100644
--- a/linuxnamespaces/idmap.py
+++ b/linuxnamespaces/idmap.py
@@ -7,6 +7,7 @@ namespace.
 
 import bisect
 import dataclasses
+import getpass
 import os
 import subprocess
 import typing
@@ -21,7 +22,7 @@ def subidranges(
     user. Return all ranges as (start, count) pairs.
     """
     if login is None:
-        login = os.getlogin()
+        login = getpass.getuser()
     with open(f"/etc/sub{kind}") as filelike:
         for line in filelike:
             parts = line.strip().split(":")