From 1202ad0fdee7d46a7c0a6a6263bb2efd713f8cf8 Mon Sep 17 00:00:00 2001
From: John Kacur <jkacur@redhat.com>
Date: Thu, 14 Mar 2019 17:14:30 +0100
Subject: [PATCH 5/5] tuna: Exit with error msg on s390 and s390x for
 unsupported irq ops

On s390 and s390x any operations involving irqs will fail.
Try to exit cleanly with an error message that these operations are
unsupported on s390 and s390x

Signed-off-by: John Kacur <jkacur@redhat.com>
---
 tuna/tuna.py | 18 +++++++++++++++++-
 1 file changed, 17 insertions(+), 1 deletion(-)

diff --git a/tuna/tuna.py b/tuna/tuna.py
index eae0408c2fe7..42db4cfcee3f 100755
--- a/tuna/tuna.py
+++ b/tuna/tuna.py
@@ -3,6 +3,7 @@
 
 import copy, ethtool, errno, os, procfs, re, schedutils, sys, shlex
 import help, fnmatch
+import platform
 from procfs import utilist
 
 try:
@@ -334,9 +335,24 @@ def affinity_remove_cpus(affinity, cpus, nr_cpus):
 		affinity = list(set(affinity) - set(cpus))
 	return affinity
 
+# True if machine is s390 or s390x
+def is_s390():
+        machine = platform.machine()
+        if re.search('s390', machine):
+                return True
+        else:
+                return False
+
 # Shound be moved to python_linux_procfs.interrupts, shared with interrupts.parse_affinity, etc.
 def parse_irq_affinity_filename(filename, nr_cpus):
-	f = file("/proc/irq/%s" % filename)
+        try:
+	        f = open("/proc/irq/%s" % filename)
+        except IOError as err:
+                if is_s390():
+                        print >> sys.stderr, "This operation is not supported on s390"
+                        print("tuna: %s" % err)
+                        sys.exit(2)
+
 	line = f.readline()
 	f.close()
 	return utilist.bitmasklist(line, nr_cpus)
-- 
2.20.1