newgidmap (1)
Leading comments
Title: newgidmap
Author: [FIXME: author] [see http://docbook.sf.net/el/author]
Generator: DocBook XSL Stylesheets v1.79.1 <http://docbook.sf.net/>
Date: 08/20/2017
Manual: User Commands
Source: shadow-utils 4.2
Language: English
NAME
newgidmap - set the gid mapping of a user namespaceSYNOPSIS
- newgidmap pid gid lowergid count [pid gid lowergid count [ ... ]]
DESCRIPTION
After the pid argument, newgidmap expects sets of 3 integers:
gid
- Begining of the range of GIDs inside the user namespace.
lowergid
- Begining of the range of GIDs outside the user namespace.
count
- Length of the ranges (both inside and outside the user namespace).
newgidmap verifies that the caller is the owner of the process indicated by pid and that for each of the above sets, each of the GIDs in the range [lowergid, lowergid+count] is allowed to the caller according to /etc/subgid before setting /proc/[pid]/gid_map.
Note that newgidmap may be used only once for a given process.
OPTIONS
There currently are no options to the newgidmap command.
FILES
/etc/subgid
- List of users subordinate group IDs.
/proc/[pid]/gid_map
- Mapping of gids from one between user namespaces.
SEE ALSO
login.defs(5), newusers(8), subgid(5), useradd(8), userdel(8), usermod(8).