Linux::Setns - Perl extension for switching the current process namespace to another namespace pointed by a path to the ns file descriptor.
use Linux::setns qw(setns CLONE_ALL CLONE_NEWIPC CLONE_NEWNET CLONE_NEWUTS CLONE_NEWUSER CLONE_NEWPID); die "setns() requires root privileges\n" if $>; setns("/proc/PID/ns/mnt", CLONE_ALL); # now your process is in the same namespaces(IPC,NET,UTS,PID,USER,MOUNT) as the /proc/PID/ns/mnt # If you want to change only one of your namespaces you can use any of the bellow examples: # Switch your current Mount namespace to the one pointed by /proc/PID/ns/mnt setns("/proc/PID/ns/mnt", CLONE_NEWNS); # Switch your current IPC namespace to the one pointed by /proc/PID/ns/ipc setns("/proc/PID/ns/ipc", CLONE_NEWIPC); # Switch your current Network namespace to the one pointed by /proc/PID/ns/net setns("/proc/PID/ns/net", CLONE_NEWNET); # Switch your current UTS namespace to the one pointed by /proc/PID/ns/uts setns("/proc/PID/ns/uts", CLONE_NEWUTS); # Switch your current Pid namespace to the one pointed by /proc/PID/ns/pid setns("/proc/PID/ns/pid", CLONE_NEWPID); # Switch your current User namespace to the one pointed by /proc/PID/ns/user setns("/proc/PID/ns/user", CLONE_NEWUSER); # Switch your current Cgroup namespace to the one pointed by /proc/PID/ns/user setns("/proc/PID/ns/user", CLONE_NEWCGROUP);
This trivial module provides interface to the Linux setns system call. It also provides the CLONE_* constants that are used to specify which kind of namespace you are entering. Also a new CLONE_ALL constat is provided so you can join/switch to any type of namespace.
The setns system call allows a process to 'join/switch' one of its namespaces to namespaces pointed by a file descriptor(usually located in /proc/PID/ns/{ipc,mnt,net,pid,user,uts}).
Note: keep in mind that using any specific CLONE_NEW* constant will fail if the FD path you gave is not of that type.
RETRUN VALUE 1 on success 0 on failure
setns - the subroutine CLONE_ALL - flag that tells that the path can be of any namespace type CLONE_NEWNS - when this flag is used the path must be from another Mount namespace CLONE_NEWIPC - when this flag is used the path must be from another IPC namespace CLONE_NEWNET - when this flag is used the path must be from another Network namespace CLONE_NEWUTS - when this flag is used the path must be from another UTS namespace CLONE_NEWPID - when this flag is used the path must be from another PID namespace CLONE_NEWUSER - when this flag is used the path must be from another User namespace CLONE_NEWCGROUP - when this flag is used the path must be from another Cgroup namespace
setns(s) Linux man page.
Marian HackMan Marinov, <hackman@cpan.org>
Copyright (C) 2017-2017 by Marian HackMan Marinov
This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself, either Perl version 5.10.1 or, at your option, any later version of Perl 5 you may have available.
To install Linux::Setns, copy and paste the appropriate command in to your terminal.
cpanm
cpanm Linux::Setns
CPAN shell
perl -MCPAN -e shell install Linux::Setns
For more information on module installation, please visit the detailed CPAN module installation guide.