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May 25th. 2007:
April, 26th. 2006:
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NEWGIDMAP
Section: User Commands (1) Updated: 05/17/2017 Index
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NAME
newgidmap - set the gid mapping of a user namespace
SYNOPSIS
-
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 in
/etc/subgid. Note that the root user is not exempted from the requirement for a valid
/etc/subgid
entry.
After the pid argument,
newgidmap
expects sets of 3 integers:
gid
-
Beginning 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/subgid
-
List 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).
Index
- NAME
-
- SYNOPSIS
-
- DESCRIPTION
-
- OPTIONS
-
- FILES
-
- SEE ALSO
-
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