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May 25th. 2007:
April, 26th. 2006:
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NEWUIDMAP
Section: User Commands (1) Updated: 05/17/2017 Index
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NAME
newuidmap - set the uid mapping of a user namespace
SYNOPSIS
-
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 in
/etc/subuid. 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:
uid
-
Beginning 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/subuid
-
List 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).
Index
- NAME
-
- SYNOPSIS
-
- DESCRIPTION
-
- OPTIONS
-
- FILES
-
- SEE ALSO
-
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