Avoid opening /dev/stdout when printing

This fixes a test failure during build in ppc64le arch

Related: RHEL-111239

Signed-off-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>

0012-keylime-policy-avoid-opening-dev-stdout.patch

@@ -0,0 +1,37 @@
+From e9a6615ea3ab60b9248377071ea2f5cc7b45dfda Mon Sep 17 00:00:00 2001
+From: Sergio Correia <scorreia@redhat.com>
+Date: Thu, 28 Aug 2025 14:33:59 +0100
+Subject: [PATCH] policy/sign: use print() when writing to /dev/stdout
+
+Signed-off-by: Sergio Correia <scorreia@redhat.com>
+---
+ keylime/policy/sign_runtime_policy.py | 9 +++++++--
+ 1 file changed, 7 insertions(+), 2 deletions(-)
+
+diff --git a/keylime/policy/sign_runtime_policy.py b/keylime/policy/sign_runtime_policy.py
+index 87529065d..316ee15aa 100644
+--- a/keylime/policy/sign_runtime_policy.py
++++ b/keylime/policy/sign_runtime_policy.py
+@@ -2,6 +2,7 @@
+ 
+ import argparse
+ import json
++import sys
+ from json.decoder import JSONDecodeError
+ from typing import TYPE_CHECKING, Any, Optional
+ 
+@@ -191,8 +192,12 @@ def sign_runtime_policy(args: argparse.Namespace) -> Optional[str]:
+         return None
+ 
+     try:
+-        with open(args.output_file, "wb") as f:
+-            f.write(signed_policy.encode("UTF-8"))
++        if args.output_file == "/dev/stdout":
++            # Let's simply print to stdout the regular way.
++            print(signed_policy, file=sys.stdout)
++        else:
++            with open(args.output_file, "wb") as f:
++                f.write(signed_policy.encode("UTF-8"))
+     except Exception as exc:
+         logger.error("Unable to write signed policy to destination file '%s': %s", args.output_file, exc)
+         return None

keylime.spec

@@ -45,6 +45,8 @@ Patch: 0010-mba-normalize-vendor_db-in-EV_EFI_VARIABLE_AUTHORITY.patch
 
 # Backported from https://github.com/keylime/keylime/pull/1794
 Patch: 0011-fix-malformed-certs-workaround.patch
+# Backported from https://github.com/keylime/keylime/pull/1795
+Patch: 0012-keylime-policy-avoid-opening-dev-stdout.patch
 
 # Main program: Apache-2.0
 # Icons: MIT