NAME
newgidmap - set the gid mapping of a user namespaceSYNOPSIS
newgidmap
pid gid lowergid count
[gid lowergid
count [ ... ]]
DESCRIPTION
The newgidmap sets /proc/[pid]/gid_map based on its command line arguments and the gids allowed. Subgid delegation can either be managed via /etc/subgid or through the configured NSS subid module. These options are mutually exclusive. Note that the root group is not exempted from the requirement for a valid /etc/subgid entry. After the pid argument, newgidmap expects sets of 3 integers: gidBeginning of the range of GIDs inside the user
namespace.
lowergid
Beginning 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/subgidList of user's 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).| 03/23/2023 | shadow-utils 4.13 |