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| author | Joseph Parmelee | 2013-03-18 05:48:57 +0100 |
|---|---|---|
| committer | Karel Zak | 2013-03-18 10:31:32 +0100 |
| commit | d53f8ecfbf036eddb2aef737dc0973a613d80ced (patch) | |
| tree | 8530b3f24f23de976a01fbaec92e2693f2fbcebe /include/colors.h | |
| parent | fsck.cramfs: fix compiler warnings (diff) | |
| download | kernel-qcow2-util-linux-d53f8ecfbf036eddb2aef737dc0973a613d80ced.tar.gz kernel-qcow2-util-linux-d53f8ecfbf036eddb2aef737dc0973a613d80ced.tar.xz kernel-qcow2-util-linux-d53f8ecfbf036eddb2aef737dc0973a613d80ced.zip | |
hwclock: make hwclock leap-second-aware
Attached is a patch file leap_seconds.patch against util-linux-2.22.2
that allows leap seconds to be included in hwclock --show or --hctosys.
The current code uses the default UTC zonefile in reading the hardware
RTC with mktime(). This zonefile usually does not include leap
seconds. As of this date there have been a total of 25 leap seconds
added since the epoch (start of 1970). This is particularly a problem
for systems using ntp to maintain their system clocks because ntp does
take leap seconds into account. A user can specify a leap-second-aware
zonefile via /etc/localtime. By defining the environment variable
TZUTC, mktime() can be induced to use a matching UTC zonefile that
includes leap seconds. The default behavior (TZUTC undefined) is
unchanged.
Regards,
Joseph Parmelee
jparmele at wildbear.com
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