This adds support to unshare for time namespaces. With the newly added
options '-t, --time' and '--monotonic' and '--boottime' it is now
possible to change CLOCK_MONOTONIC and CLOCK_BOOTTIME in a new time
namespace.
The time namespace has been merged in kernel version 5.6 and an easy way
to test it is using CLOCK_BOOTTIME and the uptime command:
# uptime
11:08:26 up 20:28, 1 user, load average: 0.00, 0.00, 0.00
# ./unshare --fork --time --boottime 100000000 uptime
11:08:29 up 1158 days, 6:15, 1 user, load average: 0.00, 0.00, 0.00
Signed-off-by: Adrian Reber <areber@redhat.com>
It's mostly wrappers for compatibility and another trivial stuff etc.
Let's keep it as public domain to make it more portable to LGPL, GPL
and BSD code.
Signed-off-by: Karel Zak <kzak@redhat.com>
CC: Sami Kerola <kerolasa@iki.fi>
CC: Ruediger Meier <ruediger.meier@ga-group.nl>
This typo causes namespace.h to always unconditionally define
CLONE_NEWNS rather than using the system definition.
Bug present since the initial version of unshare in commit
4205f1fda1.
Signed-off-by: Josh Triplett <josh@joshtriplett.org>
Signed-off-by: Anton Cherkashyn <mail@antonc.com>
Move the defitions of CLONE_NEWNS, CLONE_NEWUTS, CLONE_NEWIPC,
CLONE_NEWNET, CLONE_NEWUSER, CLONE_NEWPID into namespace.h in case
sched.h does not provide those definitions. Are there systems
around that are old enough that still need this?
Move the definitions of unshare() and setns() into namespace.h
for supporting old versions of libc that does not provice these.
I have tested this support with setns as I still have systems
old enough that glibc does not wrap setns.
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
Adrian Reber
Karel Zak
Serge Hallyn
Josh Triplett
Sami Kerola
Eric W. Biederman