Python中如何检查程序是否以root权限运行？Pathlib能否在Linux下查询UID？

Hey there! Let's tackle your two questions about Python on Linux:

On Linux (and all Unix-like systems), the root user has a UID (User ID) of 0. The simplest way to verify if your script is running with root privileges is to check the current process's UID using the os module:

import os

if os.getuid() == 0:
    print("Running as root")
else:
    print("Not running as root")

A quick note: This works whether you logged in directly as root or used sudo to run the script—both cases will return a UID of 0. Keep in mind this method doesn't apply to Windows, since it doesn't have a "root" equivalent.

Pathlib doesn't have a dedicated built-in method for fetching UIDs directly, but it can get you there indirectly. Every Path object has a .stat() method that returns an os.stat_result object, which includes the st_uid attribute—this represents the UID of the file/directory's owner.

Here's a practical example:

from pathlib import Path

# Replace with your target file or directory path
target_path = Path("/home/user/my_file.txt")
path_stat = target_path.stat()
owner_uid = path_stat.st_uid

print(f"The owner UID of {target_path} is {owner_uid}")

Just to clarify: This gives you the UID of the file's owner, not the UID of the current running process. If you need the current process's UID, stick with os.getuid() as shown in the first section.

内容的提问来源于stack exchange，提问作者user13604415