NAME
newuidmap - set the uid mapping of a user namespaceSYNOPSIS
newuidmap
pid uid loweruid count
[uid loweruid
count [ ... ]]
DESCRIPTION
The newuidmap sets /proc/[pid]/uid_map based on its command line arguments and the uids allowed. Subuid delegation can either be managed via /etc/subuid or through the configured NSS subid module. These options are mutually exclusive. Note that the root user is not exempted from the requirement for a valid /etc/subuid entry. After the pid argument, newuidmap expects sets of 3 integers: uidBeginning of the range of UIDs inside the user
namespace.
loweruid
Beginning of the range of UIDs outside the
user namespace.
count
Length of the ranges (both inside and outside
the user namespace).
newuidmap verifies that the caller is the owner of the process indicated
by pid and that for each of the above sets, each of the UIDs in the
range [loweruid, loweruid+count) is allowed to the caller according to
/etc/subuid before setting /proc/[pid]/uid_map.
Note that newuidmap may be used only once for a given process.
OPTIONS
There currently are no options to the newuidmap command.FILES
/etc/subuidList of user's subordinate user IDs.
/proc/[pid]/uid_map
Mapping of uids from one between user
namespaces.
SEE ALSO
login.defs(5), newusers(8), subuid(5), useradd(8), usermod(8), userdel(8).| 03/23/2023 | shadow-utils 4.13 |