Scott Kitterman
38 lines
1.4 KiB
Python
38 lines
1.4 KiB
Python
# drop_priviledges (from https://github.com/nigelb/Static-UPnP)
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# Copyright (C) 2016 NigelB
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# Copyright (C) 2018 Scott Kitterman
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License along
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# with this program; if not, write to the Free Software Foundation, Inc.,
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# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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def drop_privileges(uid_name, gid_name, umask=0o077):
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if os.getuid() != 0:
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# We're not root so, like, whatever dude
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self.logger.info("Not running as root. Cannot drop permissions.")
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return
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# Get the uid/gid from the name
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running_uid = pwd.getpwnam(uid_name).pw_uid
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running_gid = grp.getgrnam(gid_name).gr_gid
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# Remove group privileges
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os.setgroups([])
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# Try setting the new uid/gid
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os.setgid(running_gid)
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os.setuid(running_uid)
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# Ensure a very conservative umask
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old_umask = os.umask(umask)
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