2020-01-13 03:39:52 -06:00
|
|
|
|
|
|
|
/*
|
|
|
|
* No copyright is claimed. This code is in the public domain; do with
|
|
|
|
* it what you wish.
|
|
|
|
*
|
|
|
|
* Compat code so unshare and setns can be used with older libcs
|
|
|
|
*/
|
2013-01-16 18:36:32 -06:00
|
|
|
#ifndef UTIL_LINUX_NAMESPACE_H
|
2013-01-20 12:04:56 -06:00
|
|
|
# define UTIL_LINUX_NAMESPACE_H
|
2013-01-16 18:36:32 -06:00
|
|
|
|
2013-01-20 12:04:56 -06:00
|
|
|
# include <sched.h>
|
2013-01-16 18:36:32 -06:00
|
|
|
|
2013-03-08 13:43:17 -06:00
|
|
|
# ifndef CLONE_NEWNS
|
2013-01-20 12:04:56 -06:00
|
|
|
# define CLONE_NEWNS 0x00020000
|
|
|
|
# endif
|
2016-03-02 19:53:42 -06:00
|
|
|
# ifndef CLONE_NEWCGROUP
|
|
|
|
# define CLONE_NEWCGROUP 0x02000000
|
|
|
|
# endif
|
2013-01-20 12:04:56 -06:00
|
|
|
# ifndef CLONE_NEWUTS
|
|
|
|
# define CLONE_NEWUTS 0x04000000
|
|
|
|
# endif
|
|
|
|
# ifndef CLONE_NEWIPC
|
|
|
|
# define CLONE_NEWIPC 0x08000000
|
|
|
|
# endif
|
|
|
|
# ifndef CLONE_NEWNET
|
|
|
|
# define CLONE_NEWNET 0x40000000
|
|
|
|
# endif
|
|
|
|
# ifndef CLONE_NEWUSER
|
|
|
|
# define CLONE_NEWUSER 0x10000000
|
|
|
|
# endif
|
|
|
|
# ifndef CLONE_NEWPID
|
|
|
|
# define CLONE_NEWPID 0x20000000
|
|
|
|
# endif
|
unshare: support the time namespace
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>
2020-03-06 05:05:00 -06:00
|
|
|
# ifndef CLONE_NEWTIME
|
|
|
|
# define CLONE_NEWTIME 0x00000080
|
|
|
|
# endif
|
2013-01-16 18:36:32 -06:00
|
|
|
|
2013-03-20 08:40:19 -05:00
|
|
|
# if !defined(HAVE_UNSHARE) || !defined(HAVE_SETNS)
|
2013-01-20 12:04:56 -06:00
|
|
|
# include <sys/syscall.h>
|
2013-03-20 08:40:19 -05:00
|
|
|
# endif
|
|
|
|
|
2013-04-17 09:58:00 -05:00
|
|
|
# if !defined(HAVE_UNSHARE) && defined(SYS_unshare)
|
2013-01-16 18:36:32 -06:00
|
|
|
static inline int unshare(int flags)
|
|
|
|
{
|
|
|
|
return syscall(SYS_unshare, flags);
|
|
|
|
}
|
2013-01-20 12:04:56 -06:00
|
|
|
# endif
|
2013-01-16 18:36:32 -06:00
|
|
|
|
2013-04-17 09:58:00 -05:00
|
|
|
# if !defined(HAVE_SETNS) && defined(SYS_setns)
|
2013-01-16 18:36:32 -06:00
|
|
|
static inline int setns(int fd, int nstype)
|
|
|
|
{
|
|
|
|
return syscall(SYS_setns, fd, nstype);
|
|
|
|
}
|
2013-01-20 12:04:56 -06:00
|
|
|
# endif
|
2013-01-16 18:36:32 -06:00
|
|
|
|
2013-01-20 12:04:56 -06:00
|
|
|
#endif /* UTIL_LINUX_NAMESPACE_H */
|