fix check for delayacct (#RHEL-16345)

Resolves: #RHEL-16345

iotop-0.6-delayacctcheck.patch

@@ -0,0 +1,29 @@
+diff -up iotop-0.6/iotop/data.py.delayacctcheck iotop-0.6/iotop/data.py
+--- iotop-0.6/iotop/data.py.delayacctcheck	2023-12-11 22:15:47.280664665 +0100
++++ iotop-0.6/iotop/data.py	2023-12-11 22:14:16.689868890 +0100
+@@ -27,6 +27,7 @@ import stat
+ import struct
+ import sys
+ import time
++from procfs import cmdline
+ 
+ #
+ # Check for requirements:
+@@ -455,8 +456,17 @@ class ProcessList(DumpableObject):
+ 
+ 
+ def sysctl_task_delayacct():
++    """ WAS:
+     try:
+         with open('/proc/sys/kernel/task_delayacct') as f:
+             return bool(int(f.read().strip()))
+     except FileNotFoundError:
+         return None
++
++
++    Because /proc/sys/kernel/task_delayacct doesn't exist on RHEL8,
++    it always returns None, which is equivalent to False in the end.
++
++    On RHEL8, delayacct_on kernel variable is enabled by default
++    """
++    return 'nodelayacct' not in cmdline().keys()

iotop.spec

@@ -1,6 +1,6 @@
 Name: iotop
 Version: 0.6
-Release: 17%{?dist}
+Release: 18%{?dist}
 Summary: Top like utility for I/O       
 License: GPLv2+
 URL: http://guichaz.free.fr/iotop/            
@@ -25,6 +25,10 @@ Patch6:	iotop-0.6-git9c49d59.patch
 # rhbz#1679201
 Patch7:	iotop-0.6-delayacctmsg.patch
 
+# downstream for RHEL8, #RHEL-16345
+Patch8:	iotop-0.6-delayacctcheck.patch
+
+Requires: python3-linux-procfs
 BuildArch: noarch
 BuildRequires:	python3-devel
 
@@ -36,14 +40,15 @@ show of behalf of which process is the I/O going on.
 
 %prep
 %setup -n %{name}-%{version}
-%patch0 -p1 -b .noendcurses
-%patch1 -p1 -b .python3
-%patch2	-p1
-%patch3 -p1 -b .batchprintutf8
-%patch4 -p1 -b .gitdd4fcc71
-%patch5 -p1 -b .gitab35334d
-%patch6 -p1 -b .git9c49d59
-%patch7 -p1 -b .delayacctmsg
+%patch -P 0 -p1 -b .noendcurses
+%patch -P 1 -p1 -b .python3
+%patch -P 2	-p1
+%patch -P 3 -p1 -b .batchprintutf8
+%patch -P 4 -p1 -b .gitdd4fcc71
+%patch -P 5 -p1 -b .gitab35334d
+%patch -P 6 -p1 -b .git9c49d59
+%patch -P 7 -p1 -b .delayacctmsg
+%patch -P 8 -p1 -b .delayacctcheck
 
 %build
 %py3_build
@@ -59,6 +64,9 @@ show of behalf of which process is the I/O going on.
 %{_mandir}/man8/iotop.*
 
 %changelog
+* Mon Dec 11 2023 Michal Hlavinka <mhlavink@redhat.com> - 0.6-18
+- fix check for delayacct (#RHEL-16345)
+
 * Mon Feb 14 2022 Michal Hlavinka <mhlavink@redhat.com> - 0.6-17
 - do not show DELAY_ACCT error for non-existent pids(#1679201)