[Bug 1888543] Re: hwclock: fails to set time on glibc 2.31

[Launchpad Bug Tracker]

This bug was fixed in the package busybox - 1:1.30.1-4ubuntu9.1

---------------
busybox (1:1.30.1-4ubuntu9.1) groovy; urgency=medium

  * cherry-pick settimeofday for glibc v2.31+ compatibility fix for upstream
    (LP: #1888543)

 -- Balint Reczey <rbalint at ubuntu.com>  Mon, 09 Nov 2020 15:55:05 +0100

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https://bugs.launchpad.net/bugs/1888543

Title:
  hwclock: fails to set time on glibc 2.31

Status in busybox package in Ubuntu:
  Fix Released
Status in busybox source package in Focal:
  Fix Released
Status in busybox source package in Groovy:
  Fix Released
Status in busybox package in Debian:
  Confirmed

Bug description:
  [Impact]
   * With glibc 2.31, hwclock from busybox is unable to set the system time
     due to the changes in settimeofday behavior.

  [Test Case]
  * Run:
    sudo busybox hwclock -s

  * It should succeed in the fixed version

  [Where problems could occur]
  * The fix calls the originally called glibc function twice, instead of passing both non-NULL parameters at once. If this compiles there should be no other issue.

  [Original Bug Text]
  With glibc 2.31, hwclock from busybox is unable to set the system time
  due to the changes in settimeofday behavior.

  The problem has been reported upstream in [1] which also contains a
  patch.

  hwclock from busybox is important as it's used on the Raspberry Pi to set the system
  time when an RTC is present.

  This bug applies to focal and groovy.

  [1] https://bugs.busybox.net/show_bug.cgi?id=12756

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