Glauber Costa <glommer@xxxxxxxxxxxxx> writes: > On 01/22/2013 01:11 PM, Eric W. Biederman wrote: >> >> The kernel support for user namespaces allows ordinary users to use >> multiple uids and gids if they can get a trusted program to tell the >> kernel the set of subordinate uids and gids they are allowed to use. >> >> This is my work to make that trusted program. >> Two new files are added /etc/subuid /etc/subgid that specify >> ranges of uids and gids that users may uses. >> >> useradd, and newusers are modifed to add users to those files. >> >> userdel is modeifed to remove users from those files. >> >> usermod is modified to give manual control of what goes in those files. >> >> newuidmap and newgidmap read the new files and update >> /proc/[pid]/uid_map and /proc/[pid]/gid_map respectively >> as requested by their command line parameters and as allowed >> by the /etc/subuid and /etc/subgid. >> >> The following patches are against the current developent trunk >> of pkg-shadow svn rev 3745. With minor tweaking of man/Makefile.am >> these patches also apply to shadow 4.1.5. >> >> Eric W. Biederman (11): >> Documentation for /etc/subuid and /etc/subgid >> login.defs.5: Document the new variables in login.defs >> Implement commonio_append. >> Add backend support for suboridnate uids and gids >> Implement find_new_sub_uids find_new_sub_gids >> userdel: Add support for removing subordinate user and group ids. >> useradd: Add support for subordinate user identifiers >> Add support for detecting busy subordinate user ids >> usermod: Add support for subordinate uids and gids. >> newusers: Add support for assiging subordinate uids and gids. >> newuidmap,newgidmap: New suid helpers for using subordinate uids and gids > > Hi, > > Is there any intention to merge this (or any later version thereof) ? > I intend to start excluding uid ranges for containers usage in OpenVZ, > and support for that in tooling would come in handy. I don't know what the state of the main pkg-shadow package is. I have heard anything and the repository seems to have been dormant since the last release almost a year ago. However the last I heard Serge was working on getting these changes into Ubuntu. So the intention is to get this code merged but I don't know what more needs to be done at this point. Eric _______________________________________________ Containers mailing list Containers@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linuxfoundation.org/mailman/listinfo/containers
