be7df01a62
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>
56 lines
1.2 KiB
C
56 lines
1.2 KiB
C
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/*
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* No copyright is claimed. This code is in the public domain; do with
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* it what you wish.
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*
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* Compat code so unshare and setns can be used with older libcs
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*/
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#ifndef UTIL_LINUX_NAMESPACE_H
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# define UTIL_LINUX_NAMESPACE_H
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# include <sched.h>
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# ifndef CLONE_NEWNS
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# define CLONE_NEWNS 0x00020000
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# endif
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# ifndef CLONE_NEWCGROUP
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# define CLONE_NEWCGROUP 0x02000000
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# endif
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# ifndef CLONE_NEWUTS
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# define CLONE_NEWUTS 0x04000000
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# endif
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# ifndef CLONE_NEWIPC
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# define CLONE_NEWIPC 0x08000000
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# endif
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# ifndef CLONE_NEWNET
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# define CLONE_NEWNET 0x40000000
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# endif
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# ifndef CLONE_NEWUSER
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# define CLONE_NEWUSER 0x10000000
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# endif
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# ifndef CLONE_NEWPID
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# define CLONE_NEWPID 0x20000000
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# endif
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# ifndef CLONE_NEWTIME
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# define CLONE_NEWTIME 0x00000080
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# endif
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# if !defined(HAVE_UNSHARE) || !defined(HAVE_SETNS)
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# include <sys/syscall.h>
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# endif
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# if !defined(HAVE_UNSHARE) && defined(SYS_unshare)
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static inline int unshare(int flags)
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{
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return syscall(SYS_unshare, flags);
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}
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# endif
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# if !defined(HAVE_SETNS) && defined(SYS_setns)
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static inline int setns(int fd, int nstype)
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{
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return syscall(SYS_setns, fd, nstype);
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}
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# endif
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#endif /* UTIL_LINUX_NAMESPACE_H */
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