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Michael Kerrisk bccacb94dd gettimeofday.2, clock_getres.2: ERRORS: EINVAL can occur if new real time is less than monotonic clock 
Attempts (settimeofday(), clcok_settime(CLOCK_REALTIME)) to set
the real time clock to a value less than the current value of the
CLOCK_MONOTONIC clock result in EINVAL.

In the kernel source file kernel/time/timekeeping.c::do_settimeofday64(),
there is this check:

        if (timespec64_compare(&tk->wall_to_monotonic, &ts_delta) > 0) {
                ret = -EINVAL;
                goto out;
        }

It appears that the check was added in Linux 4.3:

    commit e1d7ba8735551ed79c7a0463a042353574b96da3
    Author: Wang YanQing <udknight@gmail.com>
    Date:   Tue Jun 23 18:38:54 2015 +0800

        time: Always make sure wall_to_monotonic isn't positive

Reported-by: Jens Thoms Toerring <jt@toerring.de>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
 		2018-05-13 16:21:03 +02:00
man1 iconv.1, bpf.2, copy_file_range.2, fcntl.2, memfd_create.2, mlock.2, mount.2, mprotect.2, perf_event_open.2, pkey_alloc.2, prctl.2, read.2, recvmmsg.2, s390_sthyi.2, seccomp.2, sendmmsg.2, syscalls.2, unshare.2, write.2, errno.3, fgetpwent.3, fts.3, pthread_rwlockattr_setkind_np.3, fuse.4, veth.4, capabilities.7, cgroups.7, ip.7, man-pages.7, namespaces.7, network_namespaces.7, sched.7, socket.7, user_namespaces.7, iconvconfig.8: tstamp 2018-02-02 07:38:54 +01:00
man2 gettimeofday.2, clock_getres.2: ERRORS: EINVAL can occur if new real time is less than monotonic clock 2018-05-13 16:21:03 +02:00
man3 termios.3: Minor tweaks to Eugene's text 2018-05-02 12:46:09 +02:00
man4 iconv.1, bpf.2, copy_file_range.2, fcntl.2, memfd_create.2, mlock.2, mount.2, mprotect.2, perf_event_open.2, pkey_alloc.2, prctl.2, read.2, recvmmsg.2, s390_sthyi.2, seccomp.2, sendmmsg.2, syscalls.2, unshare.2, write.2, errno.3, fgetpwent.3, fts.3, pthread_rwlockattr_setkind_np.3, fuse.4, veth.4, capabilities.7, cgroups.7, ip.7, man-pages.7, namespaces.7, network_namespaces.7, sched.7, socket.7, user_namespaces.7, iconvconfig.8: tstamp 2018-02-02 07:38:54 +01:00
man5 proc.5: Mention choom(1) in discussion of /proc/[pid]/oom_score_adj 2018-05-01 11:07:11 +02:00
man6 intro.6: wfix 2017-08-25 21:41:03 +02:00
man7 inotify.7: Note ENOTDIR error that can occur for IN_ONLYDIR 2018-05-06 10:22:13 +02:00
man8 execve.2, fallocate.2, getrlimit.2, io_submit.2, membarrier.2, mmap.2, msgget.2, open.2, ptrace.2, readv.2, semget.2, shmget.2, shutdown.2, syscall.2, wait.2, wait4.2, crypt.3, encrypt.3, fseek.3, getcwd.3, makedev.3, pthread_create.3, puts.3, tsearch.3, elf.5, filesystems.5, group.5, passwd.5, sysfs.5, mount_namespaces.7, posixoptions.7, time.7, unix.7, vdso.7, xattr.7, ld.so.8: tstamp 2018-04-30 17:41:31 +02:00
scripts man_show_fixme.sh: Fix rendering issue 2016-12-27 09:36:23 +01:00
Changes Start of man-pages-4.17: updating Changes and Changes.old 2018-04-30 21:34:48 +02:00
Changes.old Start of man-pages-4.17: updating Changes and Changes.old 2018-04-30 21:34:48 +02:00
Makefile Makefile: Remove a redundant comment 2017-11-20 10:38:10 +01:00
README README: tfix 2017-05-13 20:14:15 +02:00
man-pages-4.17.Announce Start of man-pages-4.17: updating .Announce and .lsm files 2018-04-30 21:34:48 +02:00
man-pages-4.17.lsm Start of man-pages-4.17: updating .Announce and .lsm files 2018-04-30 21:34:48 +02:00

README 

This package contains Linux man pages for sections 1 through 8.  Some
more information is given in the 'man-pages-x.y.Announce' file.

Installing and uninstalling
===========================
"make install" will copy these man pages to /usr/share/man/man[1-8].

To install to a path different from /usr, use
"make install prefix=/install/path".

"make remove" or "make uninstall" will remove any man page in this
distribution from its destination.  Use with caution, and remember to
use "prefix" if desired, as with the "install" target.

"make" or "make all" will perform "make uninstall" followed by "make
install".

Man page overlap and duplication
================================
Note that sometimes these pages are duplicates of pages also distributed
in other packages.  This has been reported about:

man page                also found in
-------------------------------------
resolver.3              bind-utils, bind9utils
resolv.conf.5           "
passwd.5                shadow, passwd
mailaddr.7              ?

Copyrights
==========
See the 'man-pages-x.y.Announce' file.

Homepage
========
For much more about the Linux man-pages project, see
http://www.kernel.org/doc/man-pages/index.html.