Created
December 17, 2019 11:05
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Convenient short term user change
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| #! /usr/bin/env python3 | |
| # | |
| # with_identity.py - Jani Tammi <[email protected]> | |
| # | |
| # Convenient way to assume another user identity for limited work. | |
| # Created for installation scripts that run as root. | |
| # | |
| import os | |
| import pwd | |
| import grp | |
| class Identity(): | |
| def __init__(self, user: str, group: str = None): | |
| self.uid = pwd.getpwnam(user).pw_uid | |
| if not group: | |
| self.gid = pwd.getpwnam(user).pw_gid | |
| else: | |
| self.gid = grp.getgrnam(group).gr_gid | |
| def __enter__(self): | |
| self.original_uid = os.getuid() | |
| self.original_gid = os.getgid() | |
| os.setegid(self.uid) | |
| os.seteuid(self.gid) | |
| def __exit__(self, type, value, traceback): | |
| os.seteuid(self.original_uid) | |
| os.setegid(self.original_gid) | |
| if __name__ == '__main__': | |
| with Identity('pi', 'www-data'): | |
| with open("/var/www/hello.html", "w") as f: | |
| f.write("<html><body>Hello World!</body></html>") | |
| # 'with' context ends, effecive user and group are restored | |
| # EOF |
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