Karel Zak
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From 0967f9a3f18e0320571db8dbc347c1e38b97f286 Mon Sep 17 00:00:00 2001
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From: J William Piggott <elseifthen@gmx.com>
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Date: Fri, 21 Feb 2020 20:03:47 -0500
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Subject: [PATCH] hwclock: make glibc 2.31 compatible
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______________________________________________________
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GNU C Library NEWS -- history of user-visible changes.
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Version 2.31
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Deprecated and removed features, and other changes affecting compatibility:
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* The settimeofday function can still be used to set a system-wide time
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zone when the operating system supports it. This is because the Linux
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kernel reused the API, on some architectures, to describe a system-wide
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time-zone-like offset between the software clock maintained by the kernel,
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and the "RTC" clock that keeps time when the system is shut down.
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However, to reduce the odds of this offset being set by accident,
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settimeofday can no longer be used to set the time and the offset
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simultaneously. If both of its two arguments are non-null, the call
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will fail (setting errno to EINVAL).
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Callers attempting to set this offset should also be prepared for the call
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to fail and set errno to ENOSYS; this already happens on the Hurd and on
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some Linux architectures. The Linux kernel maintainers are discussing a
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more principled replacement for the reused API. After a replacement
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becomes available, we will change settimeofday to fail with ENOSYS on all
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platforms when its 'tzp' argument is not a null pointer.
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settimeofday itself is obsolescent according to POSIX. Programs that set
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the system time should use clock_settime and/or the adjtime family of
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functions instead. We may cease to make settimeofday available to newly
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linked binaries after there is a replacement for Linux's time-zone-like
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offset API.
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______________________________________________________
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hwclock(8) had one settimeofday(2) call where both args were set for
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--hctosys when the RTC was ticking UTC. This allowed setting the system
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time, timezone, and locking the warp_clock function with a single call.
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That operation now takes 3 calls of settimeofday(2).
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Although this common operation now takes three calls, the overall logic
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for the set_system_clock() function was simplified.
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Co-Author: Karel Zak <kzak@redhat.com>
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Signed-off-by: J William Piggott <elseifthen@gmx.com>
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---
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sys-utils/hwclock.c | 71 +++++++++++++++++++++++----------------------
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1 file changed, 37 insertions(+), 34 deletions(-)
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diff --git a/sys-utils/hwclock.c b/sys-utils/hwclock.c
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index e736da717..1191a8571 100644
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--- a/sys-utils/hwclock.c
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+++ b/sys-utils/hwclock.c
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@@ -643,28 +643,28 @@ display_time(struct timeval hwctime)
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* tz.tz_minuteswest argument and sets PCIL (see below). At boot settimeofday(2)
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* has one-shot access to this function as shown in the table below.
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*
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- * +-------------------------------------------------------------------+
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- * | settimeofday(tv, tz) |
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- * |-------------------------------------------------------------------|
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- * | Arguments | System Time | PCIL | | warp_clock |
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- * | tv | tz | set | warped | set | firsttime | locked |
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- * |---------|---------|---------------|------|-----------|------------|
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- * | pointer | NULL | yes | no | no | 1 | no |
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- * | pointer | pointer | yes | no | no | 0 | yes |
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- * | NULL | ptr2utc | no | no | no | 0 | yes |
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- * | NULL | pointer | no | yes | yes | 0 | yes |
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- * +-------------------------------------------------------------------+
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+ * +-------------------------------------------------------------------------+
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+ * | settimeofday(tv, tz) |
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+ * |-------------------------------------------------------------------------|
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+ * | Arguments | System Time | TZ | PCIL | | warp_clock |
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+ * | tv | tz | set | warped | set | set | firsttime | locked |
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+ * |---------|---------|---------------|-----|------|-----------|------------|
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+ * | pointer | NULL | yes | no | no | no | 1 | no |
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+ * | NULL | ptr2utc | no | no | yes | no | 0 | yes |
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+ * | NULL | pointer | no | yes | yes | yes | 0 | yes |
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+ * +-------------------------------------------------------------------------+
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* ptr2utc: tz.tz_minuteswest is zero (UTC).
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* PCIL: persistent_clock_is_local, sets the "11 minute mode" timescale.
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* firsttime: locks the warp_clock function (initialized to 1 at boot).
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+ * Since glibc v2.31 settimeofday() will fail if both args are non NULL
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*
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* +---------------------------------------------------------------------------+
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* | op | RTC scale | settimeofday calls |
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* |---------|-----------|-----------------------------------------------------|
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* | systz | Local | 1) warps system time*, sets PCIL* and kernel tz |
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* | systz | UTC | 1st) locks warp_clock* 2nd) sets kernel tz |
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- * | hctosys | Local | 1st) sets PCIL* 2nd) sets system time and kernel tz |
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- * | hctosys | UTC | 1) sets system time and kernel tz |
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+ * | hctosys | Local | 1st) sets PCIL* & kernel tz 2nd) sets system time |
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+ * | hctosys | UTC | 1st) locks warp* 2nd) sets tz 3rd) sets system time |
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* +---------------------------------------------------------------------------+
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* * only on first call after boot
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*/
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@@ -675,42 +675,45 @@ set_system_clock(const struct hwclock_control *ctl,
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struct tm broken;
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int minuteswest;
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int rc = 0;
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- const struct timezone tz_utc = { 0 };
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localtime_r(&newtime.tv_sec, &broken);
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minuteswest = -get_gmtoff(&broken) / 60;
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if (ctl->verbose) {
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- if (ctl->hctosys && !ctl->universal)
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- printf(_("Calling settimeofday(NULL, %d) to set "
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- "persistent_clock_is_local.\n"), minuteswest);
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- if (ctl->systz && ctl->universal)
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+ if (ctl->universal) {
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puts(_("Calling settimeofday(NULL, 0) "
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- "to lock the warp function."));
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+ "to lock the warp_clock function."));
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+ if (!( ctl->universal && !minuteswest ))
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+ printf(_("Calling settimeofday(NULL, %d) "
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+ "to set the kernel timezone.\n"),
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+ minuteswest);
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+ } else
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+ printf(_("Calling settimeofday(NULL, %d) to warp "
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+ "System time, set PCIL and the kernel tz.\n"),
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+ minuteswest);
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+
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if (ctl->hctosys)
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- printf(_("Calling settimeofday(%ld.%06ld, %d)\n"),
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- newtime.tv_sec, newtime.tv_usec, minuteswest);
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- else {
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- printf(_("Calling settimeofday(NULL, %d) "), minuteswest);
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- if (ctl->universal)
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- puts(_("to set the kernel timezone."));
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- else
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- puts(_("to warp System time."));
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- }
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+ printf(_("Calling settimeofday(%ld.%06ld, NULL) "
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+ "to set the System time.\n"),
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+ newtime.tv_sec, newtime.tv_usec);
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}
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if (!ctl->testing) {
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+ const struct timezone tz_utc = { 0 };
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const struct timezone tz = { minuteswest };
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- if (ctl->hctosys && !ctl->universal) /* set PCIL */
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- rc = settimeofday(NULL, &tz);
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- if (ctl->systz && ctl->universal) /* lock warp_clock */
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+ /* If UTC RTC: lock warp_clock and PCIL */
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+ if (ctl->universal)
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rc = settimeofday(NULL, &tz_utc);
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- if (!rc && ctl->hctosys)
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- rc = settimeofday(&newtime, &tz);
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- else if (!rc)
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+
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+ /* Set kernel tz; if localtime RTC: warp_clock and set PCIL */
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+ if (!rc && !( ctl->universal && !minuteswest ))
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rc = settimeofday(NULL, &tz);
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+ /* Set the System Clock */
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+ if ((!rc || errno == ENOSYS) && ctl->hctosys)
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+ rc = settimeofday(&newtime, NULL);
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+
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if (rc) {
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warn(_("settimeofday() failed"));
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return EXIT_FAILURE;
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--
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2.25.2
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@ -7,7 +7,6 @@ password include system-auth
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# pam_selinux.so close should be the first session rule
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session required pam_selinux.so close
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session required pam_loginuid.so
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session optional pam_console.so
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# pam_selinux.so open should only be followed by sessions to be executed in the user context
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session required pam_selinux.so open
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session required pam_namespace.so
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@ -2,7 +2,7 @@
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Summary: A collection of basic system utilities
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Name: util-linux
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Version: 2.35.1
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Release: 7%{?dist}
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Release: 8%{?dist}
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License: GPLv2 and GPLv2+ and LGPLv2+ and BSD with advertising and Public Domain
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URL: http://en.wikipedia.org/wiki/Util-linux
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@ -113,6 +113,8 @@ Patch1: 0001-libfdisk-script-accept-sector-size-ignore-unknown-he.patch
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Patch2: 0002-fstrim-do-not-use-Protect-setting-in-systemd-service.patch
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# https://github.com/ibm-s390-tools/s390-tools/issues/80
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Patch3: 0003-lsblk-fix-P-regression-from-v2.34.patch
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# 1823463 - hwclock unable to set system time
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Patch4: 0004-hwclock-make-glibc-2.31-compatible.patch
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%description
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The util-linux package contains a large variety of low-level system
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@ -939,6 +941,10 @@ fi
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%{_libdir}/python*/site-packages/libmount/
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%changelog
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* Wed Apr 15 2020 Kalev Lember <klember@redhat.com> - 2.35.1-8
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- fix #1822226 - remove pam_console dependency
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- fix #1823463 - hwclock unable to set system time
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* Tue Mar 24 2020 Kalev Lember <klember@redhat.com> - 2.35.1-7
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- Another attempt at enabling fstrim.timer on F32 upgrades (#1811506)
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