newuidmap(1)

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 it's command line
   arguments and the uids allowed in /etc/subuid.

   After the pid argument, newuidmap expects sets of 3 integers:

   uid
       Begining of the range of UIDs inside the user namespace.

   loweruid
       Begining 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 users 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).

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