dnf-plugins-core/0006-Fix-boot-time-derivation-for-systems-with-no-rtc.patch
Jaroslav Rohel 022945760b Enable "leaves" and "show-leaves" plugins, backport patches
Resolves: rhbz#2182157
Resolves: rhbz#2157844
Resolves: rhbz#2182004
Resolves: rhbz#2203766
Resolves: rhbz#2134638
2023-05-15 17:52:50 +02:00

56 lines
2.1 KiB
Diff

From f65bb02d8c6fb6569c3e1db43c3b0e9f2a0ab283 Mon Sep 17 00:00:00 2001
From: Todd Lewis <todd_lewis@unc.edu>
Date: Wed, 16 Nov 2022 10:45:39 -0500
Subject: [PATCH] Fix boot time derivation for systems with no rtc
That addresses https://bugzilla.redhat.com/show_bug.cgi?id=2137935
---
plugins/needs_restarting.py | 24 +++++++++++++++++++++++-
1 file changed, 23 insertions(+), 1 deletion(-)
diff --git a/plugins/needs_restarting.py b/plugins/needs_restarting.py
index 91dbe66..03831fa 100644
--- a/plugins/needs_restarting.py
+++ b/plugins/needs_restarting.py
@@ -34,6 +34,7 @@ import functools
import os
import re
import stat
+import time
# For which package updates we should recommend a reboot
@@ -199,7 +200,28 @@ class ProcessStart(object):
@staticmethod
def get_boot_time():
- return int(os.stat('/proc/1').st_mtime)
+ """
+ We have two sources from which to derive the boot time. These values vary
+ depending on containerization, existence of a Real Time Clock, etc.
+ For our purposes we want the latest derived value.
+ - st_mtime of /proc/1
+ Reflects the time the first process was run after booting
+ This works for all known cases except machines without
+ a RTC - they awake at the start of the epoch.
+ - /proc/uptime
+ Seconds field of /proc/uptime subtracted from the current time
+ Works for machines without RTC iff the current time is reasonably correct.
+ Does not work on containers which share their kernel with the
+ host - there the host kernel uptime is returned
+ """
+
+ proc_1_boot_time = int(os.stat('/proc/1').st_mtime)
+ if os.path.isfile('/proc/uptime'):
+ with open('/proc/uptime', 'rb') as f:
+ uptime = f.readline().strip().split()[0].strip()
+ proc_uptime_boot_time = int(time.time() - float(uptime))
+ return max(proc_1_boot_time, proc_uptime_boot_time)
+ return proc_1_boot_time
@staticmethod
def get_sc_clk_tck():
--
2.40.1